False opening prevention hand pull valve with self-locking function

Abstract

The utility model discloses a mistaken opening prevention hand-pull valve with a self-locking function, which relates to the technical field of hand-pull valves, and comprises a hand-pull valve main body, one end of the hand-pull valve main body is provided with an operation pull rod, the outer end of the operation pull rod is fixedly connected with a pull rod handle, and the pull rod handle is fixedly sleeved with a handle clamping sleeve. A self-locking hydraulic rod sleeve is fixedly connected to one side of the hand pulling valve body, a hydraulic piston is slidably connected to an inner cavity of the self-locking hydraulic rod sleeve, a movable inner rod is fixedly connected to the outer end of the hydraulic piston, and the outer end of the movable inner rod penetrates through the self-locking hydraulic rod sleeve and then is fixedly connected with a handle clamping sleeve. And through the arranged switching mechanism and hydraulic oil on the two sides of the hydraulic piston, the situation that a traditional hand pulling valve is possibly unlocked accidentally in the vibration environment is effectively avoided, and the stability and safety of the system are improved. Meanwhile, the switching mechanism is easy and convenient to operate, the fatigue feeling of operators is relieved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of manual valve technology, specifically to a manual valve with a self-locking function to prevent accidental opening. Background Technology

[0002] Pneumatic manual valves play a crucial role in industrial automation and hydraulic systems, requiring frequent state switching to meet diverse operational needs. This process often necessitates continuous force to maintain the valve's position. Over extended periods, this sustained force can easily lead to operator fatigue. Due to their critical role in automation systems, the performance of pneumatic manual valves directly impacts the overall system efficiency and reliability. Therefore, we propose a self-locking manual valve to prevent accidental opening. Utility Model Content

[0003] The purpose of this invention is to address the problem that traditional hand-operated valves typically achieve one-way locking through ratchet or latch mechanisms to ensure valve stability in a specific direction. However, when unlocking is required, the operator must manually rotate the handle to a specific angle, often requiring continuous force to maintain the valve's position. Over prolonged operation, this continuous force can easily lead to operator fatigue. Furthermore, in environments with strong vibrations, wear on the ratchet may cause accidental unlocking, affecting system stability and safety, and potentially disrupting the entire production process. This invention provides a self-locking hand-operated valve to prevent accidental unlocking.

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0005] A self-locking anti-accidental opening hand-operated valve includes a hand-operated valve body. One end of the hand-operated valve body is provided with an operating lever, and the outer end of the operating lever is fixedly connected to a lever handle. A handle sleeve is fixedly fitted onto the lever handle, and a self-locking hydraulic rod sleeve is fixedly connected to one side of the hand-operated valve body. A hydraulic piston is slidably connected to the inner cavity of the self-locking hydraulic rod sleeve, and a movable inner rod is fixedly connected to the outer end of the hydraulic piston. The outer end of the movable inner rod passes through the self-locking hydraulic rod sleeve and is fixedly connected to the handle sleeve. A switching mechanism is provided at the front end of the handle sleeve corresponding to the center of the movable inner rod, and hydraulic oil is filled into both sides of the inner cavity of the self-locking hydraulic rod sleeve corresponding to the hydraulic piston.

[0006] Furthermore, the switching mechanism includes a switching inner rod, which is slidably inserted into the center of the movable inner rod. One end of the switching inner rod corresponding to the hydraulic piston passes through the hydraulic piston and is fixedly connected to a switching sealing plug. The outer ring of the hydraulic piston is provided with a connecting hole connecting both sides of the hydraulic piston, and the switching sealing plug is positioned to cover the connecting hole.

[0007] Furthermore, a button groove is provided on the outer side of the handle sleeve corresponding to the outer end of the movable inner rod, and a switching button is fixedly connected to the outer end of the switching inner rod after passing through the button groove. The switching button is movably inserted into the button groove, and a compression spring is sleeved on the outer wall of the switching inner rod between the inner side of the switching button and the bottom of the button groove.

[0008] Furthermore, the hydraulic piston has a tapered groove with a large opening facing outwards on its outer side, and the switching sealing plug has a tapered protrusion on the side facing the hydraulic piston. The tapered protrusion of the switching sealing plug matches the tapered groove on the outer side of the hydraulic piston. One end of the outer ring connecting hole of the hydraulic piston is located outside the movable inner rod, and the other end is located in the middle of the tapered groove of the hydraulic piston.

[0009] Furthermore, a fixing block is fitted on the outer side of the self-locking hydraulic rod sleeve, and connecting blocks are fixedly connected to both ends of the fixing block. The connecting blocks abut against one side of the fixing block, and connecting screws are fixedly connected to the side of the connecting blocks facing the hand-operated valve body. Connecting pressure plates are fitted on the rear ends of the two connecting screws on the same side, and the connecting pressure plates abut against the opposite side of the hand-operated valve body through rubber pads. The connecting screws are threaded with wing nuts after passing through the connecting pressure plates.

[0010] Furthermore, an oil supply connector is provided at the end of the self-locking hydraulic rod sleeve away from the movable inner rod.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. This utility model utilizes a self-locking hydraulic rod sleeve, which is directly installed on the outside of the finished hand-operated valve body. A movable inner rod and a hydraulic piston are connected, with the inner rod linked to the handle handle via a handle sleeve. The hydraulic piston slides left and right within the self-locking hydraulic rod sleeve. A switching mechanism and hydraulic oil on both sides of the hydraulic piston allow the handle handle to be pulled to operate the hand-operated valve body. When the hand-operated valve body needs to be operated, the switching mechanism is opened, allowing the hydraulic oil on both sides of the hydraulic piston to flow freely left and right. When the valve reaches the designated position, the switching mechanism is closed, locking the handle position and achieving a self-locking function. The handle cannot be moved without opening the switching mechanism, preventing accidental opening of the hand-operated valve. This effectively avoids the accidental unlocking that may occur with traditional hand-operated valves in vibrating environments, improving system stability and safety. Furthermore, the switching mechanism is simple and convenient to operate, reducing operator fatigue and improving work efficiency.

[0013] 2. This utility model uses a switching inner rod to push the switching sealing plug to move, thereby realizing the contact and separation between the switching sealing plug and the hydraulic piston. When the switching sealing plug contacts the hydraulic piston, it blocks the connecting hole, preventing the hydraulic oil on both sides of the hydraulic piston from flowing to each other, thus locking the position of the hydraulic piston. Furthermore, the position of the lever handle is locked by fixing the lever handle with the handle sleeve.

[0014] 3. The present invention, through the setting of conical groove and conical protrusion, facilitates automatic alignment when the switching sealing plug is connected to the hydraulic piston, avoids misalignment of the switching sealing plug, and ensures reliable operation of the switching mechanism. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention;

[0016] Figure 2 This is a bottom sectional view of the present invention;

[0017] Figure 3 This is a utility model Figure 2 Enlarged view of point A in the middle;

[0018] Figure 4 This is a utility model Figure 2 Enlarged view of point B in the middle.

[0019] Reference numerals: 1. Hand valve body; 2. Operating lever; 3. Lever handle; 4. Handle sleeve; 5. Fixing block; 6. Self-locking hydraulic rod sleeve; 7. Movable inner rod; 8. Hydraulic piston; 9. Switching inner rod; 10. Switching sealing plug; 11. Switching button; 12. Button groove; 13. Compression spring; 14. Connecting block; 15. Connecting screw; 16. Connecting pressure plate; 17. Wing nut; 18. Oil supply connector. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0021] Please see Figures 1-4This utility model provides a self-locking anti-accidental opening hand-operated valve, including a hand-operated valve body 1. One end of the hand-operated valve body 1 is provided with an operating lever 2, and the outer end of the operating lever 2 is fixedly connected to a lever handle 3. A handle sleeve 4 is sleeved and fixed on the lever handle 3. A self-locking hydraulic rod sleeve 6 is fixedly connected to one side of the hand-operated valve body 1. A hydraulic piston 8 is slidably connected to the inner cavity of the self-locking hydraulic rod sleeve 6, and a movable inner rod 7 is fixedly connected to the outer end of the hydraulic piston 8. The outer end of the movable inner rod 7 passes through the self-locking hydraulic rod sleeve 6 and is fixedly connected to the handle sleeve 4. A switching mechanism is provided at the front end of the handle sleeve 4 corresponding to the center of the movable inner rod 7. Hydraulic oil is filled into both sides of the inner cavity of the self-locking hydraulic rod sleeve 6 corresponding to the hydraulic piston 8.

[0022] In this embodiment, preferably, the switching mechanism includes a switching inner rod 9, which is slidably inserted into the center of the movable inner rod 7. One end of the switching inner rod 9, corresponding to the hydraulic piston 8, passes through the hydraulic piston 8 and is fixedly connected to a switching sealing plug 10. The outer ring of the hydraulic piston 8 is provided with a connecting hole connecting both sides of the hydraulic piston 8, and the switching sealing plug 10 is positioned to cover the connecting hole. Through the switching inner rod 9, the switching inner rod 9 can push the switching sealing plug 10 to move, thereby realizing the contact and separation between the switching sealing plug 10 and the hydraulic piston 8. When the switching sealing plug 10 contacts the hydraulic piston 8, it blocks the connecting hole, preventing the hydraulic oil on both sides of the hydraulic piston 8 from flowing to each other, thereby locking the position of the hydraulic piston 8. Then, the position of the pull rod handle 3 is locked by fixing it with the handle sleeve 4.

[0023] In this embodiment, preferably, a button groove 12 is provided on the outer side of the handle sleeve 4 corresponding to the outer end of the movable inner rod 7, and a switching button 11 is fixedly connected to the outer end of the switching inner rod 9 after passing through the button groove 12. The switching button 11 is movably inserted into the button groove 12, and a compression spring 13 is sleeved on the outer wall of the switching inner rod 9 between the inner side of the switching button 11 and the bottom of the button groove 12. Through the provided switching button 11, the switching button 11 is movably inserted into the button groove 12 and is kept pushing outward under the return force of the compression spring 13, thereby driving the switching inner rod 9 to press the switching sealing plug 10 and the hydraulic piston 8 together. When it is necessary to open the connection of hydraulic oil on both sides of the hydraulic piston 8, simply press the switching button 11 to operate and release the switching button 11. The switching inner rod 9 will then reset under the return force of the compression spring 13. The operation is simple and convenient.

[0024] In this embodiment, preferably, the outer side of the hydraulic piston 8 is provided with a conical groove with a large opening facing outwards, and the switching sealing plug 10 is provided with a conical protrusion on the side facing the hydraulic piston 8. The conical protrusion of the switching sealing plug 10 matches the conical groove on the outer side of the hydraulic piston 8. One end of the outer ring connecting hole of the hydraulic piston 8 is located outside the movable inner rod 7, and the other end is provided in the middle of the conical groove of the hydraulic piston 8. The conical groove and conical protrusion facilitate automatic alignment when the switching sealing plug 10 is docked with the hydraulic piston 8, avoid misalignment of the switching sealing plug 10, and ensure reliable operation of the switching mechanism.

[0025] In this embodiment, preferably, a fixing block 5 is fitted on the outer side of the self-locking hydraulic rod sleeve 6, and connecting blocks 14 are fixedly connected to both ends of the fixing block 5. The connecting blocks 14 abut against one side of the fixing block 5, and connecting screws 15 are fixedly connected to the opposite side of the hand valve body 1 facing the connecting block 14. Connecting plates 16 are fitted on the rear ends of the two connecting screws 15 on the same side, and the connecting plates 16 abut against the opposite side of the hand valve body 1 through rubber pads. The connecting screws 15 pass through the connecting plates 16 and are threaded with wing nuts 17. Through the fixed block 5, the fixed block 5 can be fixed to the side wall of the hand valve body 1 through the cooperation of the connecting blocks 14 and the connecting screws 15, which facilitates the clamping and installation of the self-locking hydraulic rod sleeve 6 by the fixed block 5, facilitates the modification of the existing finished hand valve body 1, and facilitates its widespread use.

[0026] In this embodiment, preferably, an oil supply connector 18 is provided at the end of the self-locking hydraulic rod sleeve 6 away from the movable inner rod 7; through the provided oil supply connector 18, a pipeline connecting the two ends of the inner cavity of the self-locking hydraulic rod sleeve 6 is provided inside the oil supply connector 18, and a sealing plug is installed at each pipeline interface. When it is necessary to remotely control the hand-operated valve body 1, the sealing plug can be removed, and a hydraulic pump can be connected through the oil supply pipeline. Thus, the hydraulic pump inputs hydraulic oil into the inner cavity of the self-locking hydraulic rod sleeve 6 to control the movement of the hydraulic piston 8, thereby remotely controlling the lever handle 3 and realizing the automation transformation of the hand-operated valve.

[0027] The working principle and usage process of this utility model are as follows: When in use, the self-locking hydraulic rod sleeve 6 is directly installed on the outside of the finished hand-operated valve body 1. A movable inner rod 7 and a hydraulic piston 8 are connected. The movable inner rod 7 is linked to the pull rod handle 3 via a handle sleeve 4. The hydraulic piston 8 slides left and right within the inner cavity of the self-locking hydraulic rod sleeve 6. Through a switching mechanism and hydraulic oil on both sides of the hydraulic piston 8, when the pull rod handle 3 needs to be pulled to operate the hand-operated valve body 1, the switching mechanism is opened, allowing the hydraulic oil on both sides of the hydraulic piston 8 to connect and slide freely left and right. When it reaches the designated position, the switching mechanism is closed, thus locking the position of the pull rod handle 3 and achieving the self-locking function of the hand-operated valve handle. Without opening the switching mechanism, the pull rod handle 3 cannot be moved, preventing accidental opening of the hand-operated valve. This effectively avoids the accidental unlocking that may occur with traditional hand-operated valves under vibration, improving the stability and safety of the system. At the same time, the switching mechanism is simple and convenient to operate, reducing operator fatigue and improving work efficiency.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mistaken opening prevention hand-pull valve with self-locking function, comprising a hand-pull valve main body (1), one end of the hand-pull valve main body (1) is provided with an operation pull rod (2), and the outer end of the operation pull rod (2) is fixedly connected with a pull rod handle (3), characterized in that: The handle sleeve (4) is sleeved and fixed on the pull rod handle (3), one side of the handle valve body (1) is fixedly connected with a self-locking hydraulic rod sleeve (6), the inner cavity of the self-locking hydraulic rod sleeve (6) is slidably connected with a hydraulic piston (8), the outer end of the hydraulic piston (8) is fixedly connected with a movable inner rod (7), the outer end of the movable inner rod (7) penetrates through the self-locking hydraulic rod sleeve (6) and is fixedly connected with the handle sleeve (4), the front end of the handle sleeve (4) is provided with a switching mechanism corresponding to the center of the movable inner rod (7), and the inner cavity of the self-locking hydraulic rod sleeve (6) is filled with hydraulic oil corresponding to the two sides of the hydraulic piston (8).

2. A mistake-proof hand-pull valve with self-locking function according to claim 1, characterized in that: The switching mechanism comprises a switching inner rod (9), the switching inner rod (9) is slidably inserted into the center of the movable inner rod (7), one end of the switching inner rod (9) penetrates through the hydraulic piston (8) and is fixedly connected with a switching sealing plug (10) corresponding to one end of the hydraulic piston (8), the outer ring of the hydraulic piston (8) is provided with a communication hole communicating the two sides of the hydraulic piston (8), and the switching sealing plug (10) is arranged at the position covering the communication hole.

3. A mistake-proof hand-pull valve with self-locking function according to claim 2, characterized in that: The outer end of the switching inner rod (9) penetrates through the button groove (12) and is fixedly connected with a switching button (11), the switching button (11) is movably inserted into the button groove (12), and the outer wall of the switching inner rod (9) between the inner side of the switching button (11) and the bottom of the button groove (12) is sleeved with a compression spring (13).

4. A mistake-proof hand-pull valve with self-locking function according to claim 2, characterized in that: The outer side of the hydraulic piston (8) is provided with a large-mouth outward taper groove, and the switching sealing plug (10) is provided with a tapered protrusion on one side facing the hydraulic piston (8), the tapered protrusion of the switching sealing plug (10) matches the tapered groove on the outer side of the hydraulic piston (8), and one end of the communication hole of the outer ring of the hydraulic piston (8) is located on the outer side of the movable inner rod (7), and the other end corresponds to the middle part of the tapered groove of the hydraulic piston (8).

5. A mistake-proof hand-pull valve with self-locking function according to claim 1, characterized in that: The outer side of the self-locking hydraulic rod sleeve (6) is sleeved with a fixed pressing block (5), both ends of the fixed pressing block (5) are fixedly connected with a connecting block (14), the connecting block (14) abuts one side of the fixed pressing block (5), and the connecting block (14) is fixedly connected with a connecting screw rod (15) on the side opposite to the handle valve body (1), the rear ends of the two connecting screw rods (15) on the same side are sleeved with a connecting pressing plate (16), and the connecting pressing plate (16) abuts the side opposite to the handle valve body (1) through a rubber pad, and the connecting screw rod (15) penetrates through the connecting pressing plate (16) and is threadedly connected with a butterfly nut (17).

6. A mistake-proof hand-pull valve with self-locking function according to claim 1, characterized in that: The self-locking hydraulic rod sleeve (6) is provided with an oil inlet (18) away from the movable inner rod (7).

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