Limiting structure of valve lock

Abstract

The utility model discloses a limiting structure of a valve lock, which relates to the technical field of valve locks, and comprises a valve main body, one side of the valve main body is rotatably connected with a valve hand wheel, one side of the valve hand wheel is provided with the valve lock, both sides of the valve lock are provided with mounting holes, and the interiors of the mounting holes are fixedly connected with lock cylinders. By the adoption of the structure, the valve lock is installed on the valve hand wheel, the through hole for the valve rod to pass through is formed in the middle of the valve lock, the two lock cylinders are installed on the two sides of the valve lock, and the lock cylinders are connected with the baffle through the transmission assembly. The lock cylinder drives the baffles to rotate through the transmission assembly, the threaded valve rod can be limited by closing the through hole through the two baffles, the stability of the state of the hand wheel is improved through the design, the mistaken touch risk is effectively reduced, and a powerful guarantee is provided for normal operation of the valve and safe operation of a system.

Description

Technical Field

[0001] This utility model belongs to the field of valve lock technology, and specifically relates to a limiting structure for a valve lock. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control parameters of the transported medium, such as temperature, pressure, and flow rate. Valve locks are key devices used to lock valves and prevent others from opening them, thus preventing safety accidents caused by misoperation.

[0003] For example, Chinese patent CN219119933U discloses a gate valve locking handwheel structure, including a guide sleeve. Two connecting brackets are fixedly installed on the outer surface of the guide sleeve, and a top ring is fixedly installed between the top ends of the two connecting brackets. In this gate valve locking handwheel structure, the handwheel moves downward under the guidance of the sliding groove and the slider, driving the insert to move downward in the groove. The compression spring contracts and generates a rebound force, causing the locking block to disengage from the locking teeth. At this time, rotating the handwheel clockwise or counterclockwise drives the threaded tube to rotate through the interference of the sliding groove and the slider, driving the threaded rod, valve stem, and valve disc in the valve body to move upward or downward. After adjustment, releasing the handwheel pushes the insert to move upward and reset under the rebound force of the spring, causing the locking block to re-insert into the gap of the locking teeth. This interferes with the rotation of the insert and the handwheel, thus effectively maintaining the position of the handwheel after adjustment.

[0004] Although the aforementioned patent has solved the problem of poor handwheel positioning and state retention after adjustment, the slider, groove, and spring structure it uses still has certain limitations in practical applications. Specifically, this structure is relatively unstable and easy to operate, thus increasing the risk of accidental contact to some extent. Such accidental contact may lead to unexpected changes in the handwheel state, thereby affecting the normal operation of the valve and the safe operation of the system, which is obviously not conducive to practical application. Utility Model Content

[0005] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a limiting structure for a valve lock to solve the problems mentioned in the background art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A limiting structure for a valve lock includes a valve body, a valve handwheel rotatably connected to one side of the valve body, a valve lock mounted on one side of the valve handwheel, mounting holes on both sides of the valve lock, a lock cylinder fixedly connected inside the mounting holes, a keyhole at the top of the lock cylinder, a transmission assembly connected inside the valve lock via the lock cylinder, a baffle plate connected to the lock cylinder via the transmission assembly, a through hole in the middle of the valve lock, two baffle plates covering the through hole, and a guide assembly located below the baffle plate inside the valve lock.

[0008] As a preferred technical solution, the transmission assembly includes a connecting block, which is connected to the bottom side of the lock cylinder. A transmission plate is connected to one side of the connecting block, and a bending plate is fixedly connected to the side of the transmission plate away from the connecting block. The side of the bending plate away from the transmission plate is fixedly connected to the side of the baffle. A connecting hole is provided on one side of the transmission plate, and the connecting block is movably connected to the connecting hole.

[0009] As a preferred technical solution, a limiting hexagonal block is fixedly connected to the bottom end of the connecting block, and one side of the limiting hexagonal block is in contact with one side of the transmission plate.

[0010] As a preferred technical solution, the bottom of the valve lock is connected to a mounting plate by screws. The mounting plate is located below the valve handwheel, and one side of the mounting plate is in contact with one side of the valve handwheel. A semi-annular groove is provided on one side of the mounting plate.

[0011] As a preferred technical solution, the guide assembly includes a guide post, which is disposed inside the valve lock. The bottom end of the guide post has a mating groove, and the top end of the guide post is fixedly connected to a gasket. The top end of the gasket is movably connected to the bottom end of one of the baffles.

[0012] In summary, the present invention has the following main advantages:

[0013] First, this utility model, by installing a valve lock on the valve handwheel, has a through hole in the middle for the valve stem to pass through, and two lock cylinders installed on both sides of the valve lock. The lock cylinders are connected to baffles through a transmission assembly. When it is necessary to close the valve lock, the key is inserted into the keyhole of the lock cylinder, causing the lock cylinder to drive the baffle to rotate through the transmission assembly. The two baffles close the through hole, thus limiting the threaded valve stem. This design not only improves the stability of the handwheel state, but also effectively reduces the risk of accidental contact, providing a strong guarantee for the normal operation of the valve and the safe operation of the system.

[0014] Secondly, this utility model, by installing a guide component inside the valve lock and mounting the guide component on the threaded valve stem, utilizes the contact between the gasket in the guide component and the baffle to achieve a better limiting effect and enhance its limiting reliability, thus providing a stronger guarantee for the stable operation of the valve. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a bottom view schematic diagram of the valve lock structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure between the lock cylinder and the transmission assembly of this utility model;

[0018] Figure 4 This is a schematic diagram of the lock cylinder structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the separate structure of the lock cylinder and transmission assembly of this utility model.

[0020] Reference numerals: 1. Valve body; 2. Valve handwheel; 3. Valve lock; 4. Keyhole; 5. Lock cylinder; 6. Transmission assembly; 61. Connecting block; 62. Transmission plate; 63. Connecting hole; 64. Limiting hexagonal block; 65. Bending plate; 7. Baffle; 8. Through hole; 9. Mounting plate; 10. Semi-annular groove; 11. Guide assembly; 111. Guide column; 112. Connecting groove; 113. Gasket; 12. Mounting hole. Detailed Implementation

[0021] Example

[0022] refer to Figures 1 to 5 The limiting structure of a valve lock described in this embodiment includes a valve body 1. A valve handwheel 2 is rotatably connected to one side of the valve body 1. A valve lock 3 is installed on one side of the valve handwheel 2. Mounting holes 12 are provided on both sides of the valve lock 3. A lock cylinder 5 is fixedly connected inside the mounting holes 12. A keyhole 4 is provided at the top of the lock cylinder 5. A transmission assembly 6 is connected to the inside of the valve lock 3 through the lock cylinder 5. A baffle 7 is connected to the lock cylinder 5 through the transmission assembly 6. A through hole 8 is provided in the middle of the valve lock 3. The two baffles 7 cover the through hole 8. A guide assembly 11 is provided inside the valve lock 3 below the baffles 7. With the above settings, when the valve lock 3 is in the locked state, the two baffles 7 will tightly cover the through hole 8, thereby effectively restricting the movement of the valve stem and providing a strong guarantee for the safe operation of the valve.

[0023] refer to Figure 4The transmission assembly 6 includes a connecting block 61, which is connected to the bottom side of the lock cylinder 5. A transmission plate 62 is connected to one side of the connecting block 61. A bending plate 65 is fixedly connected to the side of the transmission plate 62 away from the connecting block 61. The side of the bending plate 65 away from the transmission plate 62 is fixedly connected to one side of the baffle 7. A connecting hole 63 is provided on one side of the transmission plate 62. The connecting block 61 is movably connected to the connecting hole 63. By setting the transmission assembly 6, a rectangular connecting block 61 is installed at the bottom of the lock cylinder 5, and a rectangular connecting hole 63 is provided in the transmission plate 62. The rectangular connecting block 61 is connected to the rectangular connecting hole 63. The rectangular structure design facilitates force distribution, allowing the lock cylinder 5 to drive the baffle 7 to rotate. Specifically, the lock cylinder 5 drives the bending plate 65 to move through the transmission plate 62, and the bending plate 65 drives the baffle 7 to rotate.

[0024] refer to Figure 4 The bottom end of the connecting block 61 is fixedly connected to a limiting hexagonal block 64, and one side of the limiting hexagonal block 64 is in contact with one side of the transmission plate 62. By setting the limiting hexagonal block 64, the installation position of the transmission plate 62 can be limited, the position of the transmission plate 62 can be stabilized, and the transmission plate 62 can be prevented from separating from the connecting block 61.

[0025] refer to Figure 2 The bottom of the valve lock 3 is connected to a mounting plate 9 by screws. The mounting plate 9 is located below the valve handwheel 2, and one side of the mounting plate 9 is in contact with one side of the valve handwheel 2. A semi-annular groove 10 is provided on one side of the mounting plate 9. By setting two mounting plates 9, which are in contact with the valve handwheel 2, and then fixed with screws, the valve lock 3 can be installed, which is convenient for the installation of the valve lock 3.

[0026] refer to Figure 3 The guide assembly 11 includes a guide post 111, which is located inside the valve lock 3. The bottom end of the guide post 111 has a mating groove 112, and the top end of the guide post 111 is fixedly connected to a gasket 113. The top end of the gasket 113 is movably connected to the bottom end of a baffle 7. By setting the guide assembly 11, the valve stem of the valve body 1 is connected and fixed to the mating groove 112 by screws, so that the guide post 111 is installed on the valve stem. The top end of the guide post 111 is fixed with the gasket 113. When the valve stem moves upward, the gasket 113 on the valve stem contacts the baffle 7, which plays a limiting role and can also protect the baffle 7 from large impact damage. It should be noted that the gasket 113 is made of high-quality wear-resistant and corrosion-resistant material to ensure its long-term reliability and durability.

[0027] Operating principle and advantages: Two mounting plates 9 are attached to the underside of the valve handwheel 2, and the mounting plates 9 are fixed to the bottom of the valve lock 3 inside with screws, so that the valve lock 3 is installed on the valve body 1. When the valve handwheel 2 needs to be operated, the key is inserted into the keyhole 4 of the lock cylinder 5. When the lock cylinder 5 rotates, the connecting block 61 will drive the transmission plate 62 to rotate in the forward direction. The transmission plate 62 drives the bending plate 65 to rotate, and the bending plate 65 drives the baffle 7 to rotate. After the two baffles 7 leave the through hole 8 of the valve lock 3, The operable valve handwheel 2 can be locked by inserting a key and turning the lock cylinder 5. The lock cylinder 5 drives the connecting block 61 to rotate, which in turn drives the transmission plate 62 to rotate in the opposite direction. The transmission plate 62 drives the bending plate 65 to rotate, which in turn drives the baffle 7 to rotate. The two baffles 7 block the through hole 8 of the valve lock 3, thus limiting the threaded valve stem. This design not only improves the stability of the handwheel but also effectively reduces the risk of accidental contact, providing a strong guarantee for the normal operation of the valve and the safe operation of the system.

Claims

1. A valve lock stop structure comprising a valve body, characterized by: One side of the valve body is rotationally connected with a valve hand wheel, one side of the valve hand wheel is installed with a valve lock, both sides of the valve lock are equipped with installation holes, the inside of the installation holes is fixedly connected with a lock core, the top of the lock core is equipped with a key hole, the inside of the valve lock is connected with a transmission assembly through the lock core, the lock core is drivingly connected with a baffle through the transmission assembly, the middle of the valve lock is equipped with a through hole, two baffles cover the through hole, the inside of the valve lock below the baffles is equipped with a guide assembly.

2. The valve lock limit structure of claim 1, wherein: The transmission assembly comprises a connecting block, the connecting block is connected with the bottom side of the lock core, one side of the connecting block is connected with a transmission plate, the side away from the connecting block of the transmission plate is fixedly connected with a bent plate, the side away from the transmission plate of the bent plate is fixedly connected with one side of the baffle.

3. The valve lock stop according to claim 2, wherein: One side of the transmission plate is equipped with a connecting hole, the connecting block is movably connected with the connecting hole.

4. The valve lock stop structure of claim 2, wherein: The bottom end of the connecting block is fixedly connected with a limiting hexagonal block, one side of the limiting hexagonal block is abutted against one side of the transmission plate.

5. The valve lock stop according to claim 1, wherein: The inside of the valve lock is connected with an installation plate through a screw at the bottom end, the installation plate is located below the valve hand wheel, one side of the installation plate is abutted against one side of the valve hand wheel, one side of the installation plate is equipped with a half ring groove.

6. The valve lock stop according to claim 1, wherein: The guide assembly comprises a guide column, the guide column is arranged in the inside of the valve lock, the bottom end of the guide column is equipped with a butt joint groove, the top of the guide column is fixedly connected with a gasket, the top of the gasket is movably connected with the bottom end of one baffle.

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