A locking structure for interchangeable devices

Abstract

This utility model discloses a locking structure for an interchangeable device, including a connecting plate and a valve stem passing through a shaft hole in the connecting plate. A positioning plate is disposed on the connecting plate, and the valve stem passes through a shaft hole in the positioning plate. The connecting plate has a fixing groove, and the positioning plate has a fixing hole corresponding to the fixing groove. The connecting plate and the positioning plate are fixed by inserting a lock cylinder into the fixing hole and the fixing groove. The lock cylinder has retractable pins on both sides, and the pins are locked by engaging the locking holes in the fixing groove. The lock cylinder can be pulled out by retracting the pins with a key. This utility model can realize a quick and low-cost switching between valve operation by handle and worm gear operation, improve the valve's adaptability to operating conditions, and prevent unauthorized operation during switching, making the operation process safer.

Description

Technical Field

[0001] This utility model relates to the field of valve operating device technology, and more specifically to a locking structure for interchangeable devices. Background Technology

[0002] In the field of industrial fluid control, valves, as key devices for controlling fluid flow, are of great importance to industrial production and management due to the flexibility and safety of their operation. With the increasing level of industrial automation and the diversification of application environments, the need for switching valve operation modes is growing. Currently, industrial valves mainly have two operation modes: manual and mechanical, each suitable for different working environments and operational requirements.

[0003] Existing technologies include improved designs for valve locking structures. For example, CN2473282Y discloses a key-unmoldable locking valve where the valve body is fixedly connected to a lock, and a locking structure exists between the lock and the valve stem or handle. A specially designed key engages with the lock cylinder to prevent unauthorized opening of the valve. Existing valve locking structures primarily focus on the safety of valve operation and preventing unauthorized operation. However, traditional valve designs typically employ fixed operating methods, such as handle operation or worm gear box operation. While this design may meet specific operating conditions during initial installation, changes in the operating environment or requirements often necessitate replacing the entire valve, resulting in resource waste and additional costs. Existing locking structures lack consideration for flexible switching of valve operating methods. Therefore, this invention proposes a locking structure with interchangeable devices. Utility Model Content

[0004] The purpose of this utility model is to provide a locking structure with interchangeable devices, which can realize the quick and low-cost switching of valve between handle operation and worm gear operation, improve the valve's adaptability to operating conditions, and prevent unauthorized operation during the switching operation, making the operation process safer.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A locking structure for an interchangeable device includes a connecting plate and a valve stem passing through a shaft hole in the connecting plate. A positioning plate is disposed on the connecting plate, and the valve stem passes through a shaft hole in the positioning plate. The connecting plate has a fixing groove, and the positioning plate has a fixing hole. The connecting plate and the positioning plate are fixed by inserting a lock cylinder into the fixing hole and the corresponding fixing groove. The lock cylinder has retractable pins on both sides, and the pins are locked by engaging the locking holes in the fixing groove. The lock cylinder can be pulled out by using a key to retract the pins.

[0006] Furthermore, there are two fixing slots.

[0007] Furthermore, the lock cylinder has a cylindrical structure with mounting holes for installing pins on its side wall. A spring is pre-installed in the mounting hole, with one end of the spring fixedly connected to the bottom of the mounting hole and the other end fixedly connected to the pin.

[0008] Furthermore, the lock cylinder is embedded with a permanent magnetic material block, the key insertion end is made of permanent magnetic material, and the magnetic poles of the permanent magnetic material block and the key insertion end are opposite magnetic poles.

[0009] Furthermore, a lock hole is provided on one side of the lock cylinder, and the cross-sectional shape and size of the key insertion end are completely consistent with the cross-sectional shape and size of the lock hole, and the two are in clearance fit, and a key ring is fixedly provided on one end of the key.

[0010] Furthermore, a screw is fixedly provided on the connecting plate by a threaded connection. The screw is located on both sides of the connecting plate, and the end of the screw abuts against the side wall of the positioning piece.

[0011] Furthermore, the valve stem is fitted with a shaft elastic retaining ring on the upper end of the positioning plate, and the lower end face of the shaft elastic retaining ring is in contact with the upper end face of the positioning plate.

[0012] Furthermore, a tee is fitted on the upper end of the valve stem at the elastic retaining ring of the shaft, the center hole of the tee is fitted with the outer peripheral wall of the valve stem, and the tee is fixed to the valve stem by two screws.

[0013] Furthermore, it also includes an extension rod, which passes through the tee and is fixed to the tee by a screw.

[0014] Beneficial Effects: This utility model, through the core cooperative structure of the connecting plate, positioning plate, lock cylinder, and key, enables flexible switching between handle operation and worm gear operation for the same valve. When operating conditions change due to factors such as system pressure variations, diameter expansion, or operating frequency adjustments, there is no need to repurchase the entire valve; only the adaptable actuator needs to be replaced to meet the new requirements. This effectively solves the technical bottleneck of traditional valves having fixed operating methods at the factory, allowing the valve to easily cope with dynamic changes in operating conditions throughout its entire life cycle. The lock cylinder and key design prevent unauthorized personnel from forcibly unlocking the valve using common tools, reducing the risk of malicious disassembly or misoperation, and making the operation process safer. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the exploded structure of this utility model; Figure 3 This is a side view cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the connecting disc structure of this utility model; Figure 5 This is a top view of the structure of this utility model; Figure 6 This utility model Figure 3 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the lock cylinder structure of this utility model.

[0017] Reference numerals in the attached diagram: 1. Connecting disc; 101. Shaft hole one; 102. Fixing groove; 103. Snap hole; 2. Tumbler; 201. Spring; 3. Key; 301. Key ring; 4. Lock cylinder; 401. Lock hole; 402. Mounting hole; 5. Positioning piece; 501. Shaft hole two; 502. Fixing hole; 6. Screw two; 7. Screw three; 8. Extension rod; 9. T-joint; 10. Valve stem; 11. Shaft elastic retaining ring; 12. Screw one; 13. Permanent magnetic material block. Detailed Implementation

[0018] like Figures 1 to 3 As shown in this specific embodiment, a locking structure for an interchangeable device includes a connecting plate 1 and a valve stem 10 penetrating the shaft hole 101 of the connecting plate 1. The connecting plate 1 is fixedly connected to the valve body. The connecting plate 1 conforms to the ISO 5211 standard, which provides a universal interface specification for the connection of industrial actuators (such as worm gear boxes). This allows the valve to be directly adapted to various actuators on the market that conform to this standard, without the need for custom development of dedicated connection components. In the initial procurement stage, if the working conditions permit in the early stages of the project, the worm gear box can be temporarily omitted, and only the handle operation component can be configured, significantly reducing the initial investment. In the later modification stage, when changing the operation mode, it is not necessary to replace the valve body; only the ISO 5211 standard needs to be purchased. The 5211 standard worm gear box or other actuators can be used, and the replacement process does not require complicated disassembly and assembly. The modification cost is effectively reduced compared to purchasing new valves. In terms of inventory management, enterprises do not need to keep both handle-operated and worm gear-operated valves at the same time. They only need to keep standardized actuators, reducing the types of inventory and capital occupation, and reducing warehousing management costs. The positioning plate 5 is set on the connecting plate 1. The valve stem 10 passes through the shaft hole 501 of the positioning plate 5. The valve stem 10 is located on the upper end of the positioning plate 5 and a shaft elastic retaining ring 11 is sleeved. The lower end face of the shaft elastic retaining ring 11 fits against the upper end face of the positioning plate 5. The shaft elastic retaining ring 11 plays an axial limiting role for the positioning plate 5, preventing the positioning plate 5 from moving axially along the valve stem 10 during valve operation and ensuring the stability of the operating force transmission.

[0019] A tee 9 is fitted on the upper end of the elastic retaining ring 11 of the valve stem 10. The center hole of the tee 9 fits against the outer peripheral wall of the valve stem 10. The tee 9 is fixed to the valve stem 10 by screw 2 6. As an independent component, the tee 9 is fixed to the valve stem 10 by screw 2 6. It can be separated by simply unscrewing screw 2 6 during disassembly, which is convenient for individual replacement or maintenance and reduces the repair cost after component damage. It also includes an extension rod 8, which passes through the tee 9 and is fixed to the tee 9 by screw 3 7. During disassembly, it does not affect other components such as the valve stem 10 and the tee 9, making the disassembly of the handle operation structure more efficient. Moreover, the extension rod 8 can be replaced individually according to actual needs, improving the adaptability of the structure.

[0020] Screw 12 is fixedly installed on the connecting plate 1 by threaded connection. Screw 12 is located on both sides of the connecting plate 1. The end of screw 12 abuts against the side wall of the positioning plate 5. The setting of screw 12 can not only restrict the radial movement of the positioning plate 5 and ensure that the positioning plate 5 does not deviate during operation, but also avoid rigid fixation of the positioning plate 5 (such as welding), which facilitates the subsequent replacement of the actuator.

[0021] The positioning plate 5 is provided with a fixing hole 502. The connecting plate 1 and the positioning plate 5 are fixed by inserting the lock core 4 into the fixing hole 502 and the corresponding fixing groove 102. The fixing of the positioning plate 5 and the connecting plate 1 prevents the valve stem 10 from being operated and rotated at will, effectively preventing the valve stem from shifting and making it more stable.

[0022] The connecting plate 1 is provided with two fixing slots 102. When installing the worm gear box, the positioning piece 5 can be removed as needed to expose the mounting hole of the worm gear box, thereby enabling the subsequent installation of the worm gear box. When the worm gear box and other components are in operation, the valve stem 10 can be controlled to drive the valve core to open and close.

[0023] The lock cylinder 4 has retractable pins 2 on both sides. The pins 2 are locked by engaging the locking holes 103 of the fixing groove 102. The lock cylinder 4 can be pulled out by retracting the pins 2 using the key 3. The lock cylinder 4 has a cylindrical structure and its side wall has mounting holes 402 for mounting the pins 2. A spring 201 is pre-installed in the mounting holes 402. One end of the spring 201 is fixedly connected to the bottom of the mounting hole 402, and the other end is fixedly connected to the pin 2. The lock cylinder 4 has a permanent magnetic material block 13 embedded inside. The insertion end of the key 3 is also made of permanent magnetic material, and the magnetic poles of the permanent magnetic material block 13 and the insertion end of the key 3 are opposite magnetic poles. The attraction force of the opposite magnetic poles drives the pin 2 to retract. Compared with the push-pull unlocking of the traditional mechanical key 3, it does not require complex toothed engagement. Magnetic unlocking does not require heavy turning or special tools, reducing the operator's workload. Magnetic drive has no mechanical wear, extending the service life of the lock cylinder 4 and the pin 2. Furthermore, unlocking can only be triggered by the key 3 with a specific magnetic pole, preventing unauthorized personnel from forcibly unlocking with general tools, avoiding misoperation or malicious disassembly, reducing the risk of system downtime due to improper operation, and improving the safety of valve operation mode switching. It is especially suitable for equipment management in industrial scenarios. The lock cylinder 4 has a lock hole 401 on one side. The cross-sectional shape and size of the key 3 insertion end are completely consistent with the cross-sectional shape and size of the lock hole 401, and the two are in clearance fit, so as to ensure that the key 3 can be smoothly inserted into the lock hole 401, avoiding the problem of not being able to be inserted or not being able to drive after being inserted tightly due to size deviation, and improving the smoothness of the unlocking action. A key ring 3 is fixedly provided on one end of the key 3.

[0024] After key 3 is inserted, the ball 2 is driven back by the attraction force of the opposite magnetic pole, which quickly releases the lock between the positioning plate 5 and the connecting plate 1. No special tools are required. Subsequent removal of components such as extension rod 8 and tee 9 only requires the removal of screw 2 6 and screw 1 12. The entire switching process can be completed by one operator within 30 minutes. Compared with the traditional valve replacement process that requires several hours of downtime, this greatly shortens the system downtime and reduces production interruption losses caused by maintenance.

[0025] Working principle: This invention utilizes a combination of mechanical locking and magnetic unlocking, along with a modular component design, to enable flexible switching between handle operation and worm gear operation of the valve. Regarding the mechanical locking, the connecting disc 1 and the positioning plate 5 serve as the basic carriers for fixing the operation mode. They are locked together by a mechanical structure consisting of the lock cylinder 4, the ball bearing 2, and the spring 201, effectively preventing the valve stem 10 from rotating arbitrarily during handle operation. The lock cylinder 4 is a cylindrical structure with a ball bearing 2 mounting hole 402 on its side wall. A spring 201 is pre-installed in the hole. Under normal conditions (when no key 3 is inserted), the spring 201 is in its naturally extended state, generating a radial thrust that pushes the ball bearing 2 outward from the lock cylinder 4. When the lock cylinder 4 passes through the fixing hole 502 of the positioning plate 5 and inserts into the fixing groove 102 of the connecting disc 1, the protruding end of the ball bearing 2 precisely engages with the locking hole 103 within the fixing groove 102, forming an axial limit between the lock cylinder 4 and the connecting disc 1, restricting the axial movement of the lock cylinder 4. Meanwhile, the screw 12 fixed by the thread on the connecting plate 1 abuts against the side wall of the positioning piece 5, restricting the positioning piece 5 from moving radially along the connecting plate 1. The double limit ensures that there is no relative displacement between the positioning piece 5 and the connecting plate 1, providing a stable foundation for fixing the handle to prevent misoperation. Regarding magnetic unlocking, the lock cylinder 4 has a permanent magnetic material block 13 embedded in it, and the key 3 insertion end is a permanent magnetic material, and the two are opposite magnetic poles. The cross-sectional shape and size of the key 3 insertion end and the lock hole 401 of the lock cylinder 4 are completely matched, ensuring that the key 3 can be accurately inserted into the lock hole 401. When the key 3 is fully inserted into the lock hole 401, the opposite magnetic poles generate a radial attraction force. This attraction force is greater than the thrust of the spring 201, causing the pin 2 to retract along the mounting hole 402 into the lock cylinder 4 until the protruding end of the pin 2 is flush with the side wall of the lock cylinder 4, disengaging from the locking hole 103 of the connecting plate 1, and releasing the axial restriction between the lock cylinder 4 and the connecting plate 1. At this time, the lock cylinder 4 can be pulled out from the connecting plate 1 and the positioning piece 5, clearing the way for subsequent switching. Regarding the handle operation transmission, the valve stem 10 passes through the connecting plate 1 and the positioning piece 5, and the upper end is successively fitted with a shaft elastic retaining ring 11 and a tee 9. The shaft elastic retaining ring 11 restricts the axial movement of the positioning piece 5 and the tee 9. The tee 9 is fixed to the valve stem 10 by screw 2 6, and the extension rod 8 is fixed to the tee 9 by screw 3 7. When the operator rotates the extension rod 8, the torque is transmitted to the valve stem 10 through the tee 9, driving the valve to open and close, thus realizing handle operation. Regarding the worm gear operation adaptation, the connecting plate 1 conforms to the ISO 5211 design standard. After removing the handle operation related components (extension rod 8, tee 9, etc.), it can be directly connected to the worm gear box assembly that conforms to the standard. The output shaft of the worm gear box is coaxially connected to the connecting plate 1. Through the speed reduction and torque increase characteristics of the worm gear, the driving force of the worm gear box is transmitted to the valve stem 10, driving the valve stem 10 to rotate. Changing the worm gear operation does not require modification of the valve body structure, ensuring the transmission reliability of the two operation methods.

[0026] Regarding the operating procedure, after completing the installation of the connecting plate 1, the positioning plate 5, the lock cylinder 4, the shaft elastic retaining ring 11, and the T-joint 9 and extension rod 8, the device is in the handle operation ready state. During daily operation, the operator needs to insert the key 3, remove the lock cylinder 4 and screw 12, hold the extension rod 8, and rotate it clockwise or counterclockwise. The torque is transmitted sequentially through the T-joint 9 to the valve stem 10. The valve stem 10 drives the valve core inside the valve to rotate, realizing the opening and closing of the valve or flow regulation. During operation, the positioning plate 5, in conjunction with the shaft elastic retaining ring 11, provides axial limitation. The rotation of the valve stem 10 drives the positioning plate 5 to rotate, ensuring that the valve stem 10 transmission is secure and the operation is precise. After the valve stem 10 is rotated into position, the operator can insert the lock cylinder 4 into the corresponding fixing hole 502 and fixing groove 102 to achieve operation. The valve stem 10 is limited, and screwing in screw 12 can further limit the valve stem to prevent accidental rotation. When switching to worm gear operation, align the key 3 insertion end with the lock hole 401 of the lock cylinder 4 and slowly insert it until the key 3 and the lock cylinder 4 are completely in contact. At this time, the attraction force of the key 3 and the embedded magnetic block in the lock cylinder 4 will cause the ball 2 to retract and disengage from the locking hole 103. Pull the key 3 upward, and the lock cylinder 4 will be pulled out simultaneously. Use a wrench to unscrew screw 6 and screw 12, pull the tee 9 upward along the axis, and take out the shaft elastic retaining ring 11 to complete the removal of the core components of the handle operation. Remove the positioning piece 5 to expose the mounting holes of the worm gear box. Then fix the worm gear box to the connecting plate 1. Select a worm gear box assembly that conforms to the ISO 5211 standard and align the hole at its output end with the standard hole at the connecting plate 1. Then fix the worm gear box to the valve body. Check the operating feel of the worm gear box. Manually rotate the worm gear box handle. The worm drives the worm wheel to rotate, and the worm wheel drives the valve stem 10 to rotate smoothly, thus completing the switch from handle operation to worm wheel operation.

[0027] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A locking structure for interchangeable devices, characterized in that, The device includes a connecting plate (1) and a valve stem (10) that passes through the first shaft hole (101) of the connecting plate (1). A positioning piece (5) is provided on the connecting plate (1). The valve stem (10) passes through the second shaft hole (501) of the positioning piece (5). The connecting plate (1) is provided with a fixing groove (102). The positioning piece (5) is provided with a fixing hole (502). The connecting plate (1) and the positioning piece (5) are fixed by inserting the lock cylinder (4) into the fixing hole (502) and the corresponding fixing groove (102). The lock cylinder (4) is provided with retractable pins (2) on both sides. The pins (2) are locked by engaging the locking holes (103) of the fixing groove (102). The lock cylinder (4) can be pulled out by using a key (3) to retract the pins (2).

2. The locking structure of an interchangeable device according to claim 1, characterized in that, There are two fixing slots (102).

3. The locking structure of an interchangeable device according to claim 1, characterized in that, The lock cylinder (4) is a cylindrical structure with a mounting hole (402) for installing a ball (2) on its side wall. A spring (201) is pre-installed in the mounting hole (402). One end of the spring (201) is fixedly connected to the bottom of the mounting hole (402), and the other end is fixedly connected to the ball (2).

4. The locking structure of an interchangeable device according to claim 3, characterized in that, The lock cylinder (4) is embedded with a permanent magnetic material block (13), the insertion end of the key (3) is a permanent magnetic material, and the magnetic poles of the permanent magnetic material block (13) and the insertion end of the key (3) are opposite magnetic poles.

5. The locking structure of an interchangeable device according to claim 4, characterized in that, The lock cylinder (4) has a lock hole (401) on one side. The cross-sectional shape and size of the key (3) insertion end are completely consistent with the cross-sectional shape and size of the lock hole (401), and the two are in clearance fit. One end of the key (3) is fixedly provided with a key (3) ring.

6. The locking structure of an interchangeable device according to claim 1, characterized in that, A screw (12) is fixedly provided on the connecting plate (1) by a threaded connection. The screw (12) is located on both sides of the connecting plate (1), and the end of the screw (12) abuts against the side wall of the positioning piece (5).

7. The locking structure of an interchangeable device according to claim 6, characterized in that, The valve stem (10) is fitted with a shaft elastic retaining ring (11) on the upper end of the positioning plate (5), and the lower end face of the shaft elastic retaining ring (11) is in contact with the upper end face of the positioning plate (5).

8. The locking structure of an interchangeable device according to claim 7, characterized in that, The valve stem (10) is fitted with a tee (9) on the upper end of the shaft elastic retaining ring (11). The center hole of the tee (9) fits against the outer peripheral wall of the valve stem (10). The tee (9) is fixed to the valve stem (10) by screw two (6).

9. The locking structure of an interchangeable device according to claim 8, characterized in that, It also includes an extension rod (8), which passes through the tee (9) and is fixed to the tee (9) by screw three (7).

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