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A disclosed pig trap door device serves as a tool for opening and/or closing a pig trap door of a pipeline. The pig trap door device may be fixed to a hinge portion of the pig trap door at a hinge attachment and may also be movably coupled to the pig trap door with a force actuator at a door attachm

A disclosed pig trap door device serves as a tool for opening and/or closing a pig trap door of a pipeline. The pig trap door device may be fixed to a hinge portion of the pig trap door at a hinge attachment and may also be movably coupled to the pig trap door with a force actuator at a door attachment. Operation of the force actuator causes the door attachment to rotate the pig trap door with sufficient torque to seal and/or remove the pig trap door.

대표청구항 ▼

1. A pig trap door device comprising: a hinge attachment configured for mounting to a stationary portion of a pig trap of a pipeline;a door attachment configured for mounting to a pig trap door of the pig trap, wherein the pig trap door rotates with respect to the pig trap for opening and closing; a

1. A pig trap door device comprising: a hinge attachment configured for mounting to a stationary portion of a pig trap of a pipeline;a door attachment configured for mounting to a pig trap door of the pig trap, wherein the pig trap door rotates with respect to the pig trap for opening and closing; anda ratchet device that couples to the hinge attachment and the door attachment, wherein the ratchet device includes a linear force member;wherein the door attachment includes a shaped portion configured to mate with an open fixture of the pig trap door; andwherein the shaped portion of the door attachment is substantially triangular in shape, and wherein the open fixture of the pig trap door is a triangular opening created by two adjacent flanges of the pig trap door. 2. The pig trap door device of claim 1, wherein the hinge attachment is configured for bolting to a portion of a door hinge supporting the pig trap door. 3. The pig trap door device of claim 1, wherein the hinge attachment includes mounting posts for receiving an end portion of the ratchet device. 4. The pig trap door device of claim 3, wherein the end portion of the ratchet device is a bushing that mates with the mounting posts. 5. The pig trap door device of claim 1, wherein the door attachment includes two parallel plates between which the linear force member may be placed. 6. The pig trap door device of claim 5, wherein the two parallel plates are configured to mate with a retaining element to apply force between the ratchet device and the door attachment. 7. The pig trap door device of claim 6, wherein the retaining element is cylindrical in shape. 8. The pig trap door device of claim 6, wherein the linear force member is a threaded rod, and wherein the ratchet device includes a threaded collar configured for threading to the threaded rod. 9. The pig trap door device of claim 1, wherein the ratchet device is configured to apply a force against the door attachment to open the pig trap door. 10. The pig trap door device of claim 1, wherein the ratchet device is configured to apply a force against the door attachment to close the pig trap door. 11. The pig trap door device of claim 10, wherein the force to close the pig trap door is a predetermined value.