A tool for opening and closing manual valves

Abstract

The present invention belongs to the technical field of tools for manual valve switching in power plants, and specifically relates to a tool for switching manual valves. The tip of a V-shaped spring buckle A faces the fixed rod A and is embedded in the fixed rod A tube until the marble of the V-shaped spring buckle A just pops out from the round ball hole A. Two telescopic rods A are sleeved on both sides of the fixed rod A. The marble of the V-shaped spring buckle A passes through the round ball hole A on the telescopic rod A, so that the telescopic rod A can be fixed, and the marble of the V-shaped spring buckle A can also be separated from the round ball hole A on the telescopic rod A as needed; one end of the spring is welded on the outer shell A, and the other end is sleeved on the cylindrical protrusion on one side of the stop pin. The stop pin can move left and right, and the cam is located between the upper surface of the stop pin and the outer shell A. The cylinder below the manual knob passes through the round hole on the outer shell A and is fixed together with the round hole of the cam. The present invention solves the problem that the F wrench cannot operate the valve in some narrow spaces and causes the anti-corrosion paint of the valve handwheel to fall off.

Description

Technical Field

[0001] The invention belongs to the technical field of tools for opening and closing manual valves in power plants, and in particular relates to a tool for opening and closing manual valves. Background Art

[0002] Valves are a type of equipment that is extremely common in modern power plants and is frequently operated. During the commissioning and normal operation of nuclear power plants, valves often need to be manually operated to change the state of the system. Traditional manual valve switches in power plants generally use F wrenches, but F wrenches are limited by the need for a certain operating space and cannot be used to operate valves in some narrow areas. In addition, using F wrenches to switch valves will inevitably cause the anti-corrosion paint on the valve handwheel to fall off, causing valve corrosion. Summary of the invention

[0003] The purpose of the present invention is to provide a tool for opening and closing manual valves, which can replace the traditional F wrench to open and close the manual valves of the power plant, so as to solve the problem that the F wrench cannot operate the valve in some narrow spaces and causes the anti-corrosion paint of the valve handwheel to fall off.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A tool for opening and closing a manual valve, comprising a T-shaped handle, a stop mechanism and an adjustable gripping mechanism, wherein the T-shaped handle comprises a round tubular operating handle and a straight hexagonal tubular transmission rod, wherein the round tubular operating handle comprises a fixed rod A, two telescopic rods A, and two V-shaped snap buckles A, wherein the straight hexagonal tubular transmission rod comprises two telescopic rods B, a V-shaped snap buckle B, a solid cylindrical rod, and a fixed rod B, wherein the stop mechanism comprises a housing A, a manual knob, a cam, a spring, a stop pin, and a brake gear, wherein the adjustable gripping mechanism comprises a housing B, two adjustable claws, and a driving gear, wherein the adjustable claw comprises a plurality of latch teeth and two cat claws;

[0006] The tip of the V-shaped spring buckle A faces the fixed rod A and is embedded in the fixed rod A tube until the marble of the V-shaped spring buckle A just pops out from the round ball hole A. The two telescopic rods A are sleeved on both sides of the fixed rod A. The marble of the V-shaped spring buckle A passes through the round ball hole A on the telescopic rod A, so that the telescopic rod A can be fixed. The marble of the V-shaped spring buckle A can also be separated from the round ball hole A on the telescopic rod A as needed to achieve the sliding adjustment arm of the telescopic rod A on the fixed rod A; the tip of the V-shaped spring buckle B faces the fixed rod B and is embedded in the fixed rod B tube until the marble of the V-shaped spring buckle B just pops out from the round ball hole B. The telescopic rod B is sleeved on the fixed rod B, and the marble of the V-shaped spring buckle B passes through the round ball hole B on the telescopic rod B, so that the telescopic rod B can be fixed. The marble of the V-shaped spring buckle B can also be separated from the round ball hole B on the telescopic rod B as needed to achieve the sliding of the telescopic rod B on the fixed rod B; the solid cylindrical rod is installed at the lower end of the telescopic rod B; the upper end of the fixed rod B is connected to the fixed rod A;

[0007] One end of the spring is welded on the housing A, and the other end is sleeved on the cylindrical protrusion on one side of the stop pin. The stop pin can move left and right. The cam is located between the upper surface of the stop pin and the housing A. The cylinder below the manual knob passes through the circular hole on the housing A and is fixed together with the circular hole of the cam. The manual knob drives the cam to rotate by rotating. The rotation of the cam squeezes the protrusion above the stop pin, driving the stop pin to translate left and right to squeeze and release the spring, thereby driving the latching teeth on the stop pin to engage and disengage with the latching teeth on the brake gear.

[0008] Each cat's claw is connected by a mechanical arm with a latching tooth and a mechanical arm without a latching tooth. The mechanical arm with a latching tooth of a cat's claw and the mechanical arm of another cat's claw overlap each other vertically, and the overlapping part is just placed in the track of the shell B.

[0009] The solid cylindrical rod passes through the circular holes on the housing A, the brake gear, the housing B and the driving gear in sequence and is welded together with the brake gear and the driving gear.

[0010] The surface of the telescopic rod A is surrounded by a plastic sleeve with grooves and anti-slip function.

[0011] A plastic gasket is bonded to the inner side of the cat's paw.

[0012] There are no teeth from the latching tooth farthest from the cat's claw to the end of the robotic arm. The height of this area is consistent with the height of the top of the latching tooth, and the length of the untoothed area is greater than the length of each tooth stroke of the driving gear, so that the driving gear will be stopped when it rotates to this untoothed area.

[0013] The stop pin is matched with the brake gear, and the drive gear is matched with the latching gear.

[0014] The number of teeth on the brake gear is greater than the number of teeth on the drive gear.

[0015] When in use, the user first rotates the manual knob to make the cam press against the stop pin to compress the spring, thereby making the stop pin disengage from the brake gear, and then rotates the T-handle clockwise to drive the driving gear, and the driving gear drives the latching teeth to expand the distance between the two adjustable claws, until the distance between the two adjustable claws can buckle the handwheel diameter, buckle the two adjustable claws at the position of the maximum diameter of the handwheel, and then rotate the T-handle counterclockwise. At this time, the plastic gaskets of the two adjustable claws will firmly grasp the handwheel, and then rotate the manual knob to make the cam disengage from the stop pin and be compressed. The spring pushes the stop pin to engage the brake gear, so that when the T-handle is rotated counterclockwise or clockwise, the two adjustable claws will firmly grasp the handwheel, and then the valve can be closed and opened by rotating the T-handle; after the operation is completed, the user manually rotates the manual knob to make the cam press against the stop pin to compress the spring, so that the stop pin is separated from the brake gear, and then the driving gear is driven by rotating the T-handle clockwise, and the driving gear drives the latching teeth to expand the distance between the two adjustable claws. When the plastic gasket is separated from the handwheel, the tool for switching the manual valve is removed.

[0016] The term "clockwise" refers to looking from above the T-handle toward the adjustable gripping mechanism.

[0017] The term "counterclockwise" refers to looking from above the T-handle toward the adjustable gripping mechanism.

[0018] When the valve is opened or closed, the requirements on the moment and the space conditions on site are met by adjusting the telescopic length of the telescopic rod A and the telescopic rod B.

[0019] The beneficial effects achieved by the present invention are:

[0020] This tool is easy to operate, suitable for operation in different spaces, suitable for handwheels of various sizes, can adjust the torque more labor-saving, the two claws bear the force to make the handwheel force balanced, and it is not easy to damage the anti-corrosion paint on the handwheel surface. This tool has obvious effects, low cost, strong practicality, and is suitable for wide promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A front view of a tool for opening and closing a manual valve;

[0022] Figure 2 It is a schematic diagram of the exploded three-dimensional structure of the tool for opening and closing the manual valve;

[0023] In the figure: a tool for switching a manual valve 1, a T-shaped handle 2, a stop mechanism 3, an adjustable gripping mechanism 4, a round tubular operating handle 21, a straight hexagonal tubular transmission rod 22, a fixed rod A211, a telescopic rod A212, a V-shaped spring buckle A213, a ball hole A214, a plastic sleeve 2121 with a groove anti-slip function, a telescopic rod B221, a V-shaped spring buckle B222, a ball hole B223, a solid cylindrical rod 224, a fixed rod B225, a housing A31, a manual knob 32, a cam 33, a spring 34, a stop pin 35, a brake gear 36, a housing B41, an adjustable claw 42, a drive gear 43, a latch tooth 421, a plastic gasket 422, and a cat claw 423. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1 , Figure 2 As shown, a tool 1 for switching a manual valve comprises a T-shaped handle 2, a stop mechanism 3 and an adjustable gripping mechanism 4, wherein the T-shaped handle 2 comprises a round tubular operating handle 21 and a straight hexagonal tubular transmission rod 22, wherein the round tubular operating handle 21 comprises a fixed rod A211, two telescopic rods A212, two V-shaped spring buckles A213, and four round ball holes A214, wherein the surface of the telescopic rod A212 is surrounded by a plastic sleeve 2121 having a groove anti-slip function, wherein the straight hexagonal tubular transmission rod 2 ... The movable rod 22 includes two telescopic rods B221, a V-shaped spring buckle B222, two ball holes B223 and a solid cylindrical rod 224, and a fixed rod B225. The stopping mechanism 3 includes a shell A31, a manual knob 32, a cam 33, a spring 34, a stop pin 35, and a brake gear 36. The adjustable grasping mechanism 4 includes a shell B41, two adjustable claws 42, and a driving gear 43. The adjustable claw 42 includes a plurality of latch teeth 421, two plastic gaskets 422, and a cat claw 423.

[0026] The retractable rods A212 on both sides of the circular tubular operating handle 21 in the T-handle 2 are respectively tightly fitted to the surface by plastic sleeves A2121 with groove anti-slip function to play the role of anti-slip and protecting the operator's hands. The tip of the V-shaped spring buckle A213 faces the fixed rod A211 and is embedded in the fixed rod A211 tube until the marble of the V-shaped spring buckle just pops out from the round ball hole A214. The two retractable rods A212 are sleeved on both sides of the fixed rod A211, and the marble of the V-shaped spring buckle A213 passes through the round ball hole A214 on the retractable rod A212, so that the retractable rod A212 can be fixed. The marble of the V-shaped spring buckle A213 can also be separated from the round ball hole A214 on the retractable rod A212 as needed to achieve the sliding adjustment force arm of the retractable rod A212 on the fixed rod A211. The tip of the V-shaped spring buckle B222 faces the fixed rod B225 and is embedded in the fixed rod B225 tube until the marble of the V-shaped spring buckle just pops out from the round ball hole B223. The telescopic rod B221 is sleeved on the fixed rod B225, and the marble of the V-shaped spring buckle B222 passes through the round ball hole B223 on the telescopic rod B221, so that the telescopic rod B221 can be fixed. The marble of the V-shaped spring buckle B222 can also be separated from the round ball hole B223 on the telescopic rod B221 as needed to achieve the sliding of the telescopic rod B221 on the fixed rod B225. The solid cylindrical rod 224 is installed at the lower end of the telescopic rod B221. The upper end of the fixed rod B225 is connected to the fixed rod A211.

[0027] One end of the spring 34 in the stop mechanism 3 is welded to the shell A31, and the other end is sleeved on the cylindrical protrusion on one side of the stop pin 35. The upper and lower surfaces of the stop pin 35 are not fixed on the shell A31 and the shell B41 and can move left and right. The cam 33 is located between the upper surface of the stop pin 35 and the shell A31. The cylinder below the manual knob 32 passes through the circular hole on the shell A31 and is fixed to the circular hole of the cam 33. The manual knob 32 is not welded to the shell A31 and can rotate. Similarly, the cam 33 is not connected to the shell A31 and the upper surface of the stop pin 35. The manual knob 32 can drive the cam 33 to rotate by rotating. The cam 33 rotates to squeeze the protrusion above the stop pin 35, driving the stop pin 35 to translate left and right to squeeze and release the spring 34, thereby driving the latching teeth on the stop pin 35 to engage and disengage with the latching teeth on the brake gear 36, wherein the brake gear 36 is not fixed to the shell A31 and the shell B41.

[0028] The plastic gasket 422 in the adjustable gripping mechanism 4 is bonded to the inner side of the two cat claws 423 of the adjustable claw 42 to increase friction and protect the gripped device from mechanical damage. Each cat claw 423 is connected by a mechanical arm with a latch 421 and a mechanical arm without a latch 421. The mechanical arm of the cat claw 423 with the latch 421 and the mechanical arm of the other cat claw 423 overlap each other up and down, and the overlapping part is just placed in the track of the shell B41. The adjustable claw 42 is movable and not welded to the shell B41. The latch 421 farthest from the cat claw 423 side to the end area of ​​the mechanical arm is not toothed. The height of this area is consistent with the height of the top of the latch 421 and the length of the untoothed area is greater than the length of each tooth stroke of the driving gear 43, so that the driving gear 43 will be stopped when it turns to this untoothed area.

[0029] The solid cylindrical rod 224 in the T-shaped handle 2 passes through the circular holes on the housing A31 , the braking gear 36 , the housing B41 , and the driving gear 43 in sequence and is welded together with the braking gear 36 and the driving gear 43 .

[0030] In a preferred solution, the stop pin 35 is matched with the brake gear 36 , the drive gear 43 is matched with the latching tooth 421 , and the brake gear 36 has significantly more teeth than the drive gear 43 .

[0031] When in use, the user first rotates the manual knob 32 so that the cam 33 presses against the stop pin 35 and compresses the spring 34, so that the stop pin 35 is disengaged from the brake gear 36, and then drives the driving gear 43 by rotating the T-handle 2 clockwise (from the top of the T-handle 2 to the gripping mechanism 4), and the driving gear 43 drives the latching tooth 421 to expand the distance between the two adjustable claws 42, until the distance between the two adjustable claws 42 can buckle the handwheel diameter, buckle the two adjustable claws 42 at the position of the maximum diameter of the handwheel, and then rotate the T-handle 2 counterclockwise (from the top of the T-handle 2 to the gripping mechanism 4), at this time The plastic of the two adjustable claws 42 The gasket 422 will firmly grasp the handwheel, and then the manual knob 32 is rotated to make the cam 33 disengage from the stop pin 35, and the compressed spring pushes the stop pin 35 to engage the brake gear 36, so that no matter whether the T-handle 2 is rotated counterclockwise or clockwise (looking from the top of the T-handle 2 to the grasping mechanism 4), the two adjustable claws will firmly grasp the handwheel, and then the valve can be closed and opened by rotating the T-handle 2. When opening and closing the valve, the requirements for torque and on-site space conditions can be met by adjusting the telescopic length of the telescopic rod A212 of the circular tubular operating handle 21 of the T-handle 2 and the telescopic rod B221 of the straight hexagonal tubular transmission rod 22. After the operation is completed, the user manually rotates the manual knob 32 so that the cam 33 presses against the stop pin 35 and compresses the spring 34, thereby disengaging the stop pin 35 from the brake gear 36. Then, the user rotates the T-handle 2 clockwise (as viewed from the top of the T-handle 2 toward the gripping mechanism 4) to drive the drive gear 43, which drives the latching tooth 421 to expand the distance between the two adjustable claws 42. When the plastic gasket 422 is disengaged from the handwheel, the tool 1 for switching the manual valve can be removed.

Claims

1. A tool for opening and closing a manual valve, characterized in that: It comprises a T-shaped handle, a stop mechanism and an adjustable gripping mechanism, wherein the T-shaped handle comprises a round tubular operating handle and a straight hexagonal tubular transmission rod, wherein the round tubular operating handle comprises a fixed rod A, two telescopic rods A, and two V-shaped snap buckles A, wherein the straight hexagonal tubular transmission rod comprises two telescopic rods B, a V-shaped snap buckle B, a solid cylindrical rod, and a fixed rod B, wherein the stop mechanism comprises a housing A, a manual knob, a cam, a spring, a stop pin, and a brake gear, wherein the adjustable gripping mechanism comprises a housing B, two adjustable claws, and a driving gear, wherein the adjustable claw comprises a plurality of latch teeth and two cat claws; The tip of the V-shaped spring buckle A faces the fixed rod A and is embedded in the fixed rod A tube until the marble of the V-shaped spring buckle A just pops out from the round ball hole A. The two telescopic rods A are sleeved on both sides of the fixed rod A. The marble of the V-shaped spring buckle A passes through the round ball hole A on the telescopic rod A, so that the telescopic rod A can be fixed. The marble of the V-shaped spring buckle A can also be separated from the round ball hole A on the telescopic rod A as needed to achieve the sliding adjustment arm of the telescopic rod A on the fixed rod A; the tip of the V-shaped spring buckle B faces the fixed rod B and is embedded in the fixed rod B tube until the marble of the V-shaped spring buckle B just pops out from the round ball hole B. The telescopic rod B is sleeved on the fixed rod B, and the marble of the V-shaped spring buckle B passes through the round ball hole B on the telescopic rod B, so that the telescopic rod B can be fixed. The marble of the V-shaped spring buckle B can also be separated from the round ball hole B on the telescopic rod B as needed to achieve the sliding of the telescopic rod B on the fixed rod B; the solid cylindrical rod is installed at the lower end of the telescopic rod B; the upper end of the fixed rod B is connected to the fixed rod A; One end of the spring is welded on the housing A, and the other end is sleeved on the cylindrical protrusion on one side of the stop pin. The stop pin can move left and right. The cam is located between the upper surface of the stop pin and the housing A. The cylinder below the manual knob passes through the circular hole on the housing A and is fixed together with the circular hole of the cam. The manual knob drives the cam to rotate by rotating. The rotation of the cam squeezes the protrusion above the stop pin, driving the stop pin to translate left and right to squeeze and release the spring, thereby driving the latching teeth on the stop pin to engage and disengage with the latching teeth on the brake gear. Each cat's claw is connected by a mechanical arm with a latching tooth and a mechanical arm without a latching tooth. The mechanical arm with a latching tooth of a cat's claw and the mechanical arm of another cat's claw overlap each other vertically, and the overlapping part is just placed in the track of the shell B. The solid cylindrical rod passes through the circular holes on the housing A, the brake gear, the housing B and the driving gear in sequence and is welded together with the brake gear and the driving gear.

2. The tool for opening and closing a manual valve according to claim 1, characterized in that: The surface of the telescopic rod A is surrounded by a plastic sleeve with grooves and anti-slip function.

3. The tool for opening and closing a manual valve according to claim 1, characterized in that: A plastic gasket is bonded to the inner side of the cat's paw.

4. The tool for opening and closing a manual valve according to claim 1, characterized in that: There are no teeth from the latching tooth farthest from the cat's claw to the end of the robotic arm. The height of this area is consistent with the height of the top of the latching tooth, and the length of the untoothed area is greater than the length of each tooth stroke of the driving gear, so that the driving gear will be stopped when it rotates to this untoothed area.

5. The tool for opening and closing a manual valve according to claim 1, characterized in that: The stop pin is matched with the brake gear, and the drive gear is matched with the latching gear.

6. The tool for opening and closing a manual valve according to claim 5, characterized in that: The number of teeth on the brake gear is greater than the number of teeth on the drive gear.

7. The tool for opening and closing a manual valve according to claim 3, characterized in that: When in use, the user first rotates the manual knob to make the cam press against the stop pin to compress the spring, thereby making the stop pin disengage from the brake gear, and then rotates the T-handle clockwise to drive the driving gear, and the driving gear drives the latching teeth to expand the distance between the two adjustable claws, until the distance between the two adjustable claws can buckle the handwheel diameter, buckle the two adjustable claws at the position of the maximum diameter of the handwheel, and then rotate the T-handle counterclockwise. At this time, the plastic gaskets of the two adjustable claws will firmly grasp the handwheel, and then rotate the manual knob to make the cam disengage from the stop pin and be compressed. The spring pushes the stop pin to engage the brake gear, so that when the T-handle is rotated counterclockwise or clockwise, the two adjustable claws will firmly grasp the handwheel, and then the valve can be closed and opened by rotating the T-handle; after the operation is completed, the user manually rotates the manual knob to make the cam press against the stop pin to compress the spring, so that the stop pin is separated from the brake gear, and then the driving gear is driven by rotating the T-handle clockwise, and the driving gear drives the latching teeth to expand the distance between the two adjustable claws. When the plastic gasket is separated from the handwheel, the tool for switching the manual valve is removed.

8. The tool for opening and closing a manual valve according to claim 7, characterized in that: The term "clockwise" refers to looking from above the T-handle toward the adjustable gripping mechanism.

9. The tool for opening and closing a manual valve according to claim 7, characterized in that: The term "counterclockwise" refers to looking from above the T-handle toward the adjustable gripping mechanism.

10. The tool for opening and closing a manual valve according to claim 7, characterized in that: When the valve is opened or closed, the requirements on the moment and the space conditions on site are met by adjusting the telescopic length of the telescopic rod A and the telescopic rod B.

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