The invention discloses a tilting disc check valve, which includes a left valve body (1), a right valve body (2), a large valve plate (3), a small valve plate (4) and a diaphragm control group (5), wherein the left valve body (1) and the right valve body (2) are butted into a whole through oblique o
The invention discloses a tilting disc check valve, which includes a left valve body (1), a right valve body (2), a large valve plate (3), a small valve plate (4) and a diaphragm control group (5), wherein the left valve body (1) and the right valve body (2) are butted into a whole through oblique openings; the oblique openings are inclined in a manner that upper parts are inclined towards the right valve body (2); the diaphragm control group (5) is arranged on the left valve body (1); the large valve plate (3) is arranged along the oblique openings; the large valve plate (3) is positioned in a valve cavity formed by the left valve body (1) and the right valve body (2); the large valve plate (3) is suspended on shaft holes of the left valve body (3) through valve shafts (6); the small valve plate (4) is connected with the diaphragm control group (5); and the small valve plate (4) is mounted at a slow closing valve port of the large valve plate (3) through a small valve plate pin shaft (7). According to the tilting disc check valve, a two-stage valve closing process where the large valve plate is quickly closed and the small valve plate at a drain hole of the large valve plate is slowly closed within adjustable time can be implemented, and the aims of reducing backflow of a water body and eliminating pump starting and stopping water hammer are fulfilled.
대표청구항▼
1. A tilting disc check valve, comprising a first valve body, a second valve body, a large valve plate, a small valve plate and a diaphragm control group, wherein the first valve body has an oblique opening and the second valve body has an oblique opening wherein both openings are abutted against ea
1. A tilting disc check valve, comprising a first valve body, a second valve body, a large valve plate, a small valve plate and a diaphragm control group, wherein the first valve body has an oblique opening and the second valve body has an oblique opening wherein both openings are abutted against each other and joined to form a combined valve body comprising the first valve body and the second valve body;the oblique openings are abutted at a matching angle from vertical such that an upper portion of the abutted oblique openings is positioned further towards the second valve body than a lower portion of the abutted oblique openings;the diaphragm control group is arranged on the first valve body;the large valve plate is arranged to be able to move within the combined valve body to a position aligned with the oblique openings;the large valve plate is suspended on shaft holes of the first valve body through valve shafts;the small valve plate is connected with the diaphragm control group;the small valve plate is mounted at a slow closing valve port of the large valve plate through a small valve plate pin shaft;an opening indication device is connected to a valve shaft, wherein the valve shaft is hollow;the opening indication device comprises an opening positioning column, an opening indication rod, an opening pointer and an opening label;the opening positioning column is arranged at a portion of the valve shaft connected with the large valve plate;the opening indication rod is arranged in the hollow valve shaft;one end of the opening indication rod is connected with the opening positioning column, and the other end of the opening indication rod is exposed from the valve shaft, and penetrates through an end cover;the opening pointer is arranged on the opening indication rod penetrating through the end cover; andthe opening pointer points to the opening label. 2. The tilting disc check valve according to claim 1, wherein an included angle between each of the oblique openings or the large valve plate and a horizontal plane is 56 to 65 degrees. 3. The tilting disc check valve according to claim 1, wherein the diaphragm control group comprises a valve rod;the valve rod is connected with a connecting rod and/or a slider; andthe diaphragm control group is connected with the small valve plate through the connecting rod and/or the slider so as to ensure that the valve rod of the diaphragm control group is linked with the small valve plate. 4. The tilting disc check valve according to claim 1, wherein the valve shafts are symmetrically arranged on two sides of the large valve plate;valve plate bearings are arranged on the valve shafts;thrust bearings are arranged at intermediate faces of the valve shafts (6); andthe valve plate bearings and the thrust bearings are all self-lubricating bearings. 5. The tilting disc check valve according to claim 1, wherein a streamlined sunken portion which is concave recessed is arranged on an outer surface of the large valve plate facing into the second valve body;the large valve plate is further provided with a clump weight;a center-of-gravity position of the large valve plate with the sunken part and the clump weight is configured so that the large valve plate can be completely closed under the action of its own weight; andan area of a plate surface of the small valve plate is 3 to 10 percent of that of a plate surface of the large valve plate. 6. The tilting disc check valve according to claim 1, wherein an oblique valve seat having a conical inner surface is arranged between the first valve body and the second valve body;a valve plate sealing ring having a spherical outer surface is arranged on the large valve plate;the valve plate sealing ring and the oblique valve seat form a large valve plate sealing pair, wherein the conical inner surface of the oblique valve seat and the spherical outer surface of the valve plate sealing ring can form a seal; andthe valve plate sealing ring is made of a metal hard sealing material and/or a flexible sealing material. 7. The tilting disc check valve according to claim 1, wherein oblique flanges are arranged on the oblique openings of the first valve body and the second valve body;the oblique valve seat is clamped between the oblique flange of the first valve body and the oblique flange of the second valve body; andthe oblique valve seat is a detachable part or a non-detachable integrated unit. 8. The tilting disc check valve according to claim 1, wherein a reserved interface is provided in a bottom of the tilting disc check valve, anda sealing cover or a damper is mounted on the reserved interface. 9. The tilting disc check valve according to claim 1, wherein the diaphragm control group comprises a diaphragm seat, a rubber diaphragm and a valve cover;a chamber formed by the diaphragm seat and the valve cover is divided into two parts, i.e. an upper diaphragm cavity and a lower diaphragm cavity, through which no water passes, in a manner that the rubber diaphragm serves as an interface;the upper diaphragm cavity is communicated with an outlet of the valve through an upper bypass pipe;the lower diaphragm cavity is communicated with an inlet of the valve through a lower bypass pipe;the diaphragm control group further comprises a valve rod bushing, the valve rod and diaphragm pressure plates;the diaphragm pressure plates are closely attached to the rubber diaphragm;the valve rod bushing is fixed on the diaphragm seat;an upper part of the valve rod penetrates through the rubber diaphragm and the diaphragm pressure plates, and is fixed on an overlapped part formed by the rubber diaphragm and the diaphragm pressure plates;a middle part of the valve rod is sleeved with the valve rod bushing;a lower end of the valve rod is connected to the small valve plate;a slider and/or a connecting rod are/is arranged at the lower end of the valve rod, wherein: the valve rod is connected with the small valve plate through the connecting rod, ora sliding chute is further provided in the small valve plate, and the slider is matched with the sliding chute to connect the valve rod with the small valve plate, orthe valve rod is connected with the small valve plate through a combined part of the slider and the connecting rod;the valve rod is kept in a vertical direction through the sliding of the slider in the sliding chute or through the connecting rod; andvolumes of the upper diaphragm cavity and the lower diaphragm cavity change under the influence of a water pressure difference between an inlet of the valve and an outlet of the valve, changes in the volumes drive the valve rod to move up and down in the valve rod bushing, and the up-and-down movement is transmitted to the small valve plate through the slider and/or the connecting rod to make the small valve plate rotate around the small valve plate pin shaft. 10. The tilting disc check valve according to claim 1, wherein one end of each valve shaft is connected to the first valve body through a movable shaft, the other end of each valve shaft is connected to the large valve plate through a thrust bearing, a bearing positioning sleeve, a valve plate bearing and an end cover,the valve shafts position the large valve plate to make the large valve plate only rotate along the valve plate bearings without axial play, andthe valve shafts enable rotation of the large valve plate, and a limiting block limits the rotation of the large valve plate around the valve shafts. 11. The tilting disc check valve according to claim 1, wherein the diaphragm control group further comprises a valve rod bushing,the valve rod bushing comprises an upper valve rod bushing and a lower valve rod bushing, andthe valve rod simultaneously penetrates through the upper valve rod bushing and the lower valve rod bushing. 12. A tilting disc check valve, comprising a large valve plate and a small valve plate, wherein the tilting disc check valve further comprises a diaphragm control group,the small valve plate is connected with the diaphragm control group,the diaphragm control group comprises a valve rod,a slider and/or a connecting rod are/is arranged at a lower end of the valve rod, wherein the valve rod is connected with the small valve plate through the connecting rod, ora sliding chute is further provided in the small valve plate, the slider is matched with the sliding chute to connect the valve rod with the small valve plate, orthe valve rod is connected with the small valve plate through a combined part of the slider and the connecting rod;the large valve plate is connected to valve shafts,an opening indication device is connected to a valve shaft, wherein the valve shaft is hollow;the opening indication device comprises an opening positioning column, an opening indication rod, an opening pointer and an opening label;the opening positioning column is arranged at a portion of the valve shaft connected with the large valve plate;the opening indication rod is arranged in the hollow valve shaft;one end of the opening indication rod is connected with the opening positioning column, and the other end of the opening indication rod is exposed from the valve shaft, and penetrates through an end cover;the opening pointer is arranged on the opening indication rod penetrating through the end cover; andthe opening pointer points to the opening label. 13. The tilting disc check valve according to claim 12, wherein the tilting disc check valve comprises a first valve body and a second valve body,the first valve body has an oblique opening and the second valve body has an oblique opening wherein both openings are abutted against each other and joined to form a combined valve body comprising the first valve body and the second valve body;the oblique openings are abutted at a matching angle from vertical such that an upper portion of the abutted oblique openings is positioned further towards the second valve body than a lower portion of the abutted oblique openings;the diaphragm control group is arranged on the first valve body;the large valve plate is arranged to be able to move within the combined valve body to a position aligned with the oblique openings;the large valve plate is suspended on shaft holes of the first valve body through the valve shafts,the small valve plate is mounted at a slow closing valve port of the large valve plate through a small valve plate pin shaft. 14. The tilting disc check valve according to claim 13, wherein one end of each valve shaft is connected to the first valve body through a movable shaft, the other end of each valve shaft is connected to the large valve plate through a thrust bearing, a bearing positioning sleeve, a valve plate bearing and an end cover,the valve shafts position the large valve plate to make the large valve plate only rotate along the valve plate bearings without axial play, andthe valve shafts enable rotation of the large valve plate, and a limiting block limits the rotation of the large valve plate around the valve shafts. 15. The tilting disc check valve according to claim 12, wherein the diaphragm control group further comprises a diaphragm seat, a rubber diaphragm, diaphragm pressure plates, a valve cover, and a valve rod bushing,the diaphragm pressure plates and the rubber diaphragm are arranged in a diaphragm cavity formed by the diaphragm seat and the valve cover,the diaphragm pressure plates are closely attached to upper and lower diaphragm surfaces of the rubber diaphragm respectively,an overlapped part formed by the diaphragm pressure plates and the rubber diaphragm is fixed with a top end of the valve rod;the rubber diaphragm divides the diaphragm cavity into an upper diaphragm cavity and a lower diaphragm cavity, through which no water passes, andthe upper diaphragm cavity is communicated with a pipeline of an outlet of the valve through an upper bypass pipe and the lower diaphragm cavity is communicated with a pipeline of an inlet of the valve through a lower bypass pipe. 16. The tilting disc check valve according to claim 12, wherein a reserved interface is provided in a bottom of the oblique plate check valve, anda sealing cover or a damper is mounted on the reserved interface. 17. The tilting disc check valve according to claim 12, wherein the diaphragm control group further comprises a valve rod bushing, diaphragm pressure plates, a diaphragm seat, a rubber diaphragm and a valve cover;a chamber formed by the diaphragm seat and the valve cover is divided into two parts, i.e. an upper diaphragm cavity and a lower diaphragm cavity, through which no water passes, in a manner that the rubber diaphragm serves as an interface;the upper diaphragm cavity is communicated with an outlet of the valve through an upper bypass pipe;the lower diaphragm cavity is communicated with an inlet of the valve through a lower bypass pipe;the diaphragm pressure plates are closely attached to the rubber diaphragm;the valve rod bushing is fixed on the diaphragm seat;an upper part of the valve rod penetrates through the rubber diaphragm and the diaphragm pressure plates, and is fixed on an overlapped part formed by the rubber diaphragm and the diaphragm pressure plates;a middle part of the valve rod is sleeved with the valve rod bushing;a lower end of the valve rod is connected to the small valve plate;the valve rod is kept in a vertical direction through the sliding of the slider in the sliding chute or through the connecting rod; andvolumes of the upper diaphragm cavity and the lower diaphragm cavity change under the influence of a water pressure difference between an inlet of the valve and an outlet of the valve, changes in the volumes drive the valve rod to move up and down in the valve rod bushing, and the up-and-down movement is transmitted to the small valve plate through the slider and/or the connecting rod to make the small valve plate rotate around the small valve plate pin shaft. 18. The tilting disc check valve according to claim 12, wherein the diaphragm control group further comprises the valve rod bushing,the valve rod bushing comprises an upper valve rod bushing and a lower valve rod bushing, andthe valve rod simultaneously penetrates through the upper valve rod bushing and the lower valve rod bushing.
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이 특허에 인용된 특허 (12)
Ucciardi Frank J., Air flow reversal prevention door assembly.
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