A valve for an adjustable handwheel torque feedback device

Abstract

This utility model relates to the field of valve technology, specifically disclosing a valve with an adjustable handwheel torque feedback device, comprising: a valve body, a mounting frame fixedly mounted on the top of the valve body, a pressure cap fixedly mounted on the top of the valve body, a valve stem mounted on the valve body, a connecting rod mounted on the top of the mounting frame, and a handwheel body fixedly mounted on the outer wall of the connecting rod; this utility model drives the adjusting screw to move by rotating the adjusting knob, and then pushes the adjusting block to compress or release the compression spring through the movable rod, thereby adjusting the clamping force between the two friction plates, realizing flexible adjustment of the handwheel operation torque feedback threshold. When the valve stem rotation resistance exceeds the preset torque value, slippage will occur between the friction plates, effectively cutting off the torque transmission and preventing mechanical damage to the valve stem, threads, and sealing components caused by overload operation, fundamentally avoiding safety accidents such as valve stem breakage and media leakage.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a valve with an adjustable handwheel torque feedback device. Background Technology

[0002] Valves are switches in pipelines that control the flow of fluid, regulate flow rate, and prevent backflow. They function to cut off, throttle, prevent backflow, and reduce pressure, ensuring the safe operation of the system. Valves are key control components in fluid transport systems. They are driven by a handwheel to rotate or lift the valve stem, which in turn moves the valve core to open, close, or regulate flow rate. The operating torque of the handwheel is an important indicator for measuring the performance and condition of the valve.

[0003] In existing technologies, most valve handwheels and valve stems are rigidly connected or fitted with a simple keyway. This structure has many drawbacks: First, when turning the valve handwheel, the operator relies entirely on their own feel to judge the valve's status and resistance. When the valve's operating torque increases due to factors such as excessively tight internal packing, sealing surface adhesion, media crystallization, or corrosion, the operator finds it difficult to accurately perceive the critical point of force. This can easily lead to the use of extended-rod "F-wrenches" or excessive force during operation. Such overload operation can directly cause serious consequences such as valve stem torsion deformation or even breakage, damage to valve stem threads, and valve core detachment. This not only causes permanent damage to the valve, leading to media leakage and safety and environmental accidents, but also results in high maintenance and replacement costs.

[0004] Secondly, although some valves in the existing technology have simple overload protection structures, such as shear pin safety clutches, their functions are limited. When overloaded, the shear pin is sheared, which can protect the valve stem, but operation can only be resumed after the machine is stopped and the pin is replaced. Automatic reset cannot be achieved, which affects the continuity of the production process and the use of the valve. Utility Model Content

[0005] The purpose of this invention is to provide a valve for an adjustable handwheel torque feedback device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A valve with an adjustable handwheel torque feedback device includes: a valve body, a mounting frame fixedly mounted on the top of the valve body, a pressure cap fixedly mounted on the top of the valve body, a valve stem provided on the valve body, a connecting rod provided on the top of the mounting frame, a handwheel body fixedly mounted on the outer wall of the connecting rod, two symmetrically arranged fixing blocks fixedly mounted on the inner wall of the mounting frame, and rotating block one and rotating block two respectively rotatably connected to the inner walls of the two fixing blocks via bearings, rotating block one and rotating block two being provided with a transmission mechanism, and a connecting assembly being provided between rotating block two and the valve stem;

[0008] The transmission mechanism includes mounting blocks respectively disposed at the top of the second rotating block and the bottom of the first rotating block. Friction plates are fixedly disposed on the outer side walls of the two mounting blocks at opposite ends. The outer side walls of the two friction plates are in contact. An adjustment component is provided between the first rotating block and the mounting block at the corresponding position. The outer side wall of the second rotating block and the outer side wall of the mounting block at the corresponding position are fixedly disposed.

[0009] Preferably, the adjustment assembly includes a mounting cavity formed inside the rotating block, a movable block and an adjustment block are slidably disposed inside the mounting cavity, a plurality of compression springs are fixedly disposed between the movable block and the adjustment block, and a lifting assembly is provided on the adjustment block.

[0010] Preferably, the bottom of the movable block and the top of the mounting block are fixedly connected, and the mounting cavity has a movable opening adapted to the mounting block.

[0011] Preferably, the bottom of the connecting rod and the top of the rotating block are fixedly connected, and sliders are fixedly provided on the outer walls of both the movable block and the adjusting block. A groove adapted to the slider is provided on the inner wall of the mounting cavity.

[0012] Preferably, the lifting assembly includes a movable rod fixedly disposed on the top of the adjusting block, the bottom of the movable rod being fixedly disposed at the center position of the adjusting block, and a through groove adapted to the movable rod being opened on the inner side wall of the rotating block, the top of the movable rod being inserted into the through groove.

[0013] Preferably, an adjustment knob is rotatably provided on the top of the rotating block, and an adjustment screw is fixedly provided at the bottom of the adjustment knob. The adjustment screw and the top of the movable rod are threadedly connected, and a threaded groove adapted to the adjustment screw is opened on the inner side wall of the movable rod.

[0014] Preferably, the connecting assembly includes a key block fixedly disposed on the top of the valve stem, and the bottom of the rotating block two is provided with a keyway adapted to the key block, and the key block is inserted into the keyway.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] Rotating the adjustment knob drives the adjustment screw to move, which in turn pushes the adjustment block to compress or release the compression spring via the movable rod, thereby adjusting the clamping force between the two friction plates. This allows for flexible adjustment of the handwheel operation torque feedback threshold. When the valve stem rotation resistance exceeds the preset torque value, slippage will occur between the friction plates, effectively cutting off torque transmission and preventing mechanical damage to the valve stem, threads, and sealing components caused by overload operation. This fundamentally avoids safety accidents such as valve stem breakage and media leakage. Attached Figure Description

[0017] Figure 1This is a perspective view of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the mounting frame in this utility model;

[0019] Figure 3 This is a cross-sectional view of the rotating block 1 in this utility model;

[0020] Figure 4 This is a schematic diagram of the connecting component in this utility model;

[0021] In the diagram: 1. Valve body; 2. Mounting frame; 3. Gland; 4. Valve stem; 5. Connecting rod; 6. Handwheel body; 7. Fixed block; 8. Rotating block one; 9. Rotating block two; 10. Mounting block; 11. Friction plate; 12. Movable block; 13. Adjusting block; 14. Compression spring; 15. Movable rod; 16. Adjusting knob; 17. Adjusting screw; 18. Key block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] Please see Figure 1 - Figure 4 As shown, a valve with an adjustable handwheel torque feedback device includes: a valve body 1, a mounting frame 2 fixedly mounted on the top of the valve body 1, a pressure cap 3 fixedly mounted on the top of the valve body 1, a valve stem 4 mounted on the valve body 1, a connecting rod 5 mounted on the top of the mounting frame 2, a handwheel body 6 fixedly mounted on the outer wall of the connecting rod 5, and two symmetrically arranged fixing blocks 7 fixedly mounted on the inner wall of the mounting frame 2. The inner walls of the two fixing blocks 7 are respectively rotatably connected to a rotating block 1 8 and a rotating block 2 9 via bearings. The rotating block 1 8 and the rotating block 2 9 are provided with a transmission mechanism, and a connecting assembly is provided between the rotating block 2 9 and the valve stem 4.

[0025] The transmission mechanism includes mounting blocks 10 respectively disposed on the top of rotating block 2 9 and the bottom of rotating block 1 8. Friction plates 11 are fixedly disposed on the outer side walls of the two mounting blocks 10 at opposite ends. The outer side walls of the two friction plates 11 are in contact. An adjustment component is provided between rotating block 1 8 and the mounting block 10 at the corresponding position. The outer side wall of rotating block 2 9 and the outer side wall of mounting block 10 at the corresponding position are fixedly disposed.

[0026] As can be seen from the above, by setting the mounting frame 2, the fixing block 7, the rotating block 1 8, the rotating block 2 9 and the transmission mechanism, a complete torque transmission and protection structure is constructed. When the operator rotates the handwheel body 6, the torque is transmitted to the rotating block 1 8 through the connecting rod 5, and then to the rotating block 2 9 through the friction plates 11, and finally drives the valve stem 4 to rotate through the connecting assembly.

[0027] The positive pressure between the two friction plates 11 can be adjusted by adjusting knob 16, thereby adjusting the torque protection threshold. When the valve is operating normally, the static friction between the friction plates 11 is sufficient to drive the valve stem 4 to rotate synchronously. However, when the valve encounters abnormal jamming or the operating torque exceeds the preset value, relative sliding will occur between the friction plates 11, effectively cutting off the torque transmission path. This design not only achieves immediate protection against overload conditions, preventing mechanical failures such as valve stem 4 breakage and thread damage, but also avoids media leakage safety accidents caused by overload operation. At the same time, the device can automatically reset after slippage, without the need to stop the machine to replace parts, greatly ensuring the continuity and stability of the production process.

[0028] Specifically, regarding the aforementioned adjustment assembly, the adjustment assembly includes a mounting cavity opened inside the rotating block 8, a movable block 12 and an adjustment block 13 are slidably arranged inside the mounting cavity, a plurality of compression springs 14 are fixedly arranged between the movable block 12 and the adjustment block 13, and a lifting assembly is provided on the adjustment block 13.

[0029] The bottom of the movable block 12 is fixedly connected to the top of the mounting block 10, and the mounting cavity has an movable opening that is adapted to the mounting block 10;

[0030] The bottom of the connecting rod 5 and the top of the rotating block 8 are fixedly connected. The outer walls of the movable block 12 and the adjusting block 13 are both fixedly equipped with sliders. The inner side wall of the mounting cavity is provided with a sliding groove that matches the slider.

[0031] As can be seen from the above, the spring force of the compression spring 14 provides the clamping force required for the friction plate 11. When the adjustment knob 16 is rotated, the movable rod 15 and the adjustment block 13 are pushed to move smoothly in the direction defined by the slide groove in the mounting cavity through the threaded transmission, changing the compression amount of the multiple compression springs 14. The change in spring pressure is directly converted into the thrust on the movable block 12 and the mounting block 10, thereby accurately controlling the contact normal pressure between the two friction plates 11. The matching design of the slider and the slide groove ensures the linearity and stability of the movable block 12 and the adjustment block 13 when they move, preventing skew and jamming, making the torque adjustment more accurate and reliable. This mechanical adjustment method has a simple structure, sensitive response and good durability, and can quickly set the appropriate protection torque according to different working conditions.

[0032] Specifically, regarding the aforementioned lifting assembly, the lifting assembly includes a movable rod 15 fixedly mounted on the top of the adjusting block 13, with the bottom of the movable rod 15 fixedly mounted at the center of the adjusting block 13, and a through groove adapted to the movable rod 15 being opened on the inner side wall of the rotating block 18, with the top of the movable rod 15 inserted into the through groove.

[0033] The top of the rotating block 8 is equipped with an adjustment knob 16, and the bottom of the adjustment knob 16 is fixedly equipped with an adjustment screw 17. The adjustment screw 17 and the top of the movable rod 15 are threadedly connected, and the inner side wall of the movable rod 15 is provided with a threaded groove that matches the adjustment screw 17.

[0034] As can be seen from the above, when the operator rotates the adjustment knob 16 located at the top, it drives the adjustment screw 17 to rotate. Since the adjustment screw 17 and the threaded groove at the top of the movable rod 15 form a threaded pair, and the movable rod 15 is constrained by the through groove and the adjustment block 13 and can only move axially, the rotational motion of the adjustment screw 17 is converted into the precise linear lifting motion of the movable rod 15. The movable rod 15 pushes the adjustment block 13, thereby changing the preload of the compression spring 14, converting the rotational operation into linear displacement and finally into pressure control, realizing stepless and precise adjustment of the protection torque. The operation is convenient and intuitive, with high adjustment accuracy and good repeatability and stability.

[0035] Example 2:

[0036] The connecting assembly includes a key block 18 fixedly mounted on the top of the valve stem 4, and a keyway adapted to the key block 18 is provided at the bottom of the rotating block 2 9, with the key block 18 inserted into the keyway.

[0037] As can be seen from the above, the connection assembly adopts the key block 18 and keyway cooperation method to realize the power transmission between the rotating block 2 9 and the valve stem 4. This connection method has a simple and reliable structure, can transmit a large torque, and at the same time ensures the coaxiality between the two, making the transmission more stable. The advantage of key connection is that it is easy to disassemble and assemble. When it is necessary to replace or repair the lower part of the valve, the handwheel torque feedback device can be easily separated from the valve stem 4, which greatly improves the convenience of maintenance work.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A valve with an adjustable handwheel torque feedback device, characterized by, include: A valve body (1) is provided with a mounting frame (2) fixedly installed on the top of the valve body (1), a pressure cap (3) fixedly installed on the top of the valve body (1), a valve stem (4) provided on the valve body (1), a connecting rod (5) provided on the top of the mounting frame (2), a handwheel body (6) fixedly installed on the outer wall of the connecting rod (5), and two symmetrically arranged fixing blocks (7) fixedly installed on the inner wall of the mounting frame (2). The inner walls of the two fixing blocks (7) are respectively rotatably connected to rotating block one (8) and rotating block two (9) through bearings. The rotating block one (8) and rotating block two (9) are provided with a transmission mechanism. A connecting component is provided between the rotating block two (9) and the valve stem (4). The transmission mechanism includes mounting blocks (10) respectively disposed on the top of rotating block two (9) and the bottom of rotating block one (8). Friction plates (11) are fixedly disposed on the outer side walls of the two mounting blocks (10) at opposite ends. The outer side walls of the two friction plates (11) are in contact. An adjustment component is provided between rotating block one (8) and the mounting block (10) at the corresponding position. The outer side wall of rotating block two (9) is fixedly disposed between the outer side wall of the mounting block (10) at the corresponding position.

2. A valve with an adjustable handwheel torque feedback device according to claim 1, characterized in that: The adjustment assembly includes an installation cavity opened inside the rotating block (8), and a movable block (12) and an adjustment block (13) are slidably arranged inside the installation cavity. Multiple compression springs (14) are fixedly arranged between the movable block (12) and the adjustment block (13), and a lifting assembly is provided on the adjustment block (13).

3. A valve with an adjustable handwheel torque feedback device as defined in claim 2, wherein: The bottom of the movable block (12) and the top of the mounting block (10) are fixedly connected, and the mounting cavity has an movable opening that is adapted to the mounting block (10).

4. A valve with an adjustable handwheel torque feedback device as defined in claim 2, wherein: The bottom of the connecting rod (5) and the top of the rotating block (8) are fixedly connected. The outer walls of the movable block (12) and the adjusting block (13) are both fixedly provided with sliders. The inner side wall of the mounting cavity is provided with a sliding groove that matches the slider.

5. A valve with an adjustable handwheel torque feedback device as defined in claim 2, wherein: The lifting assembly includes a movable rod (15) fixedly installed on the top of the adjusting block (13). The bottom of the movable rod (15) is fixedly installed at the center of the adjusting block (13). The inner side wall of the rotating block (8) is provided with a through groove that matches the movable rod (15). The top of the movable rod (15) is inserted into the through groove.

6. A valve having an adjustable handwheel torque feedback device as defined in claim 5, wherein: The top of the rotating block (8) is provided with an adjustment knob (16), and the bottom of the adjustment knob (16) is fixedly provided with an adjustment screw (17). The adjustment screw (17) and the top of the movable rod (15) are threadedly connected. The inner side wall of the movable rod (15) is provided with a threaded groove that matches the adjustment screw (17).

7. A valve with an adjustable handwheel torque feedback device as defined in claim 1, wherein: The connecting assembly includes a key block (18) fixedly mounted on the top of the valve stem (4), and the bottom of the rotating block (9) is provided with a keyway that matches the key block (18), and the key block (18) is inserted into the keyway.

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