Multi-turn locking device
By designing a multi-rotary locking device, using components such as flip cover, valve lock and lock core, the problem of small-pipe valves being easily self-closed or opened under high pressure and vibration conditions is solved, and effective locking and safe and reliable operation of small-diameter valves are achieved.
Patent Information
- Application Number
- CN202422389265.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-30
AI Technical Summary
Small-pipe valves are prone to self-closing or self-opening on high flow, high pressure, and vibrating pipes, resulting in frequent misoperation accidents. The prior art lacks effective locking devices to prevent such phenomena.
A multi-rotary locking device is designed, including a flip cover, a valve lock, a lock core, a special-shaped lock tongue and a lock pin. The lock core is inserted and rotated through the key, so that the special-shaped lock tongue extends into or out of the mating notch, thereby locking or unlocking the connection between the flip cover and the valve housing.
It effectively prevents the accidental collision and random rotation of small-diameter valves, improves the reliability and safety of the valves, and does not change the original equipment, is simple to install, flexible to operate and has a long service life.
Smart Images
Figure CN223004547U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valve protection, in particular to a multi-turn locking device. Background Art
[0002] There are a large number of manually operated devices in the fields of petroleum, chemical industry, electric power and high-risk manufacturing industries, such as valves. Accidents caused by misoperation are common. According to statistics, 70% of the accidents in the oil and gas industry are caused by human operation errors. With the rapid development of modern industry, users hope to have a device that does not modify or damage the original valve equipment and reduces human misoperation.
[0003] It is found in the research that most of the small-diameter valves do not have valve limiting devices. Once these valves are installed on pipelines with large flow rates, high pressures and vibrations, the valves will mostly self-close or self-open. Therefore, there is an urgent need for a locking device to prevent the valve from self-closing or self-opening and improve the reliability of the valve. Summary of the Utility Model
[0004] In view of the above-mentioned deficiencies existing at present, the utility model provides a multi-turn locking device, which can realize the limitation of the opening or closing of multi-turn small-diameter valves, effectively prevent accidental touch and random rotation operation, is safe and reliable, can be customized on the basis of not modifying or damaging the original equipment, is simple to install, flexible to operate, has a long service life and strong applicability.
[0005] To achieve the above object, the embodiments of the utility model adopt the following technical solutions:
[0006] The multi-turn locking device is installed on the valve housing. The multi-turn locking device includes a flip cover and a valve lock. The flip cover is hinged to the valve housing. A lock slot is provided on the flip cover. The valve lock is fixed to the flip cover. The valve lock includes a lock core and a special-shaped lock tongue, which are fixed. A mating slot is provided on the valve housing. When the lock slot and the mating slot are aligned, by inserting and rotating the lock core with a key, one end of the special-shaped lock tongue extends into or disengages from the mating slot, so as to lock and fix or release the connection between the flip cover and the valve housing.
[0007] According to one aspect of the utility model, a lock pin is further included. The lock pin is connected to the flip cover. When the flip cover rotates to cover the valve housing, the lock pin is inserted into the toothed slot of the main shaft in the valve housing.
[0008] According to one aspect of the utility model, the lock pin is rigidly fixed to the flip cover.
[0009] According to one aspect of the utility model, an outer cover and a spring are further included. The outer cover is fixed to the flip cover. The spring is arranged in the outer cover. One end of the lock pin is connected to the spring and the other end is sleeved in the flip cover.
[0010] According to one aspect of the present utility model, the valve lock further includes a lock body, which is fixed to the flip cover, and the lock core is installed in the lock body.
[0011] According to one aspect of the present utility model, the lock core and the special-shaped lock tongue are tightly fixed by a sunk groove tab and a countersunk socket head cap screw.
[0012] Advantages of the implementation of the present utility model: When the valve handwheel or the valve stem is not concentric with the remote transmission drive shaft, when operating the remote transmission mechanism at this time, the remote transmission drive shaft will swing the transmission torque at the center of this adapter, that is, the swing core shaft will not be at the center position of the fixed disk. The rotation torque of the remote transmission drive shaft is transmitted to the fixed disk through the fork connected to the swing core shaft, and then transmitted to the valve handwheel or the valve stem, and finally the valve is opened or closed; in this way, this adapter can reduce the use of universal joints or couplings, reduce the use cost, and can solve problems such as the narrow installation space and installation deviation of the traditional remote transmission mechanism installation adapter; this adapter can not only have the universal joint adjustment function, but also borrow its original use space, with a simple structure, reliable and durable. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0014] Figure 1 It is a schematic structural diagram of the present utility model when locking the valve state during application;
[0015] Figure 2 It is a schematic cross-sectional structural diagram of the present utility model when locking the valve state during application;
[0016] Figure 3 It is a schematic structural diagram of the present utility model when unlocking the valve state during application.
[0017] The names corresponding to the serial numbers in the figure are as follows:
[0018] 1. Handle body; 2. Handle sleeve; 3. Ball screw; 4. Flip cover; 5. Roll pin; 6. Valve housing; 7. Main shaft; 8. Socket head cap screw; 9. Valve end adapter; 10. Valve stem nut; 11. Key; 12. Outer cover; 13. Spring; 14. Lock pin; 15. Special-shaped lock tongue; 16. Lock core; 17. Sunk groove tab; 18. Countersunk socket head cap screw; 19. Valve stem; 20. Lock groove opening; 21. Matching groove opening. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0020] Embodiment 1
[0021] As Figure 1 、 Figure 2 、 Figure 3 shown, a multi-turn locking device is installed on the valve housing 6 of a multi-turn small-bore valve to restrict the opening or closing of the small-bore valve, effectively preventing accidental touching and random rotation operations. The multi-turn locking device includes a flap 4 and a valve lock; the flap 4 is hinged to the valve housing 6 through a roll pin 5, and the flap 4 can be flipped 180°. A lock slot 20 is provided on the flap 4, which is in the shape of an arc groove; the valve lock is fixed to the flap 4, and the valve lock includes a lock body, a lock core 16, and a special-shaped lock tongue 15. The lock body is welded and fixed to the flap 4, the lock core 16 is fitted and installed in the lock body, and the special-shaped lock tongue 15 and the lock core 16 are tightened and fixed by a sunk groove tab 17 and a countersunk head socket head cap screw 18. The special-shaped lock tongue 15 and the lock core 16 are adapted to be linked, and both can be rotated 0° to 90° by a key 11; a mating slot 21 is provided on the valve housing 6. When the flap 4 is at 0° or covers the valve housing 6, that is, when the lock slot 20 of the flap 4 and the mating slot 21 of the valve housing 6 are aligned, by inserting and rotating the lock core 16 (and the special-shaped lock tongue 15) with the key 11, one end of the special-shaped lock tongue 15 extends into or disengages from the mating slot 21, so as to lock and fix or release the connection between the flap 4 and the valve housing 6. When this device is used, by controlling the authorized key 11, the multi-turn small-bore valve is supervised and restricted, and it can be opened or closed only when the predetermined process requirements are met.
[0022] In this embodiment, the key 11 and the lock core 16 are unique. The special-shaped lock tongue 15 is in the shape of a combined structure of a square plate and a triangular plate or a trapezoidal plate. The mating slot 21 is a wide slot or a rectangular slot, and its structural shape is adapted to the structural shape of the lock slot 20. The lock body is in the shape of a cylindrical barrel, which can play the roles of installing, protecting, and dust-proofing internal components such as the lock core 16. The engraved content on the panel of the key 11 and the dust-proof cover of the lock core 16 or the panel of the lock body can be customized to meet the coding requirements of customers for different devices.
[0023] In this embodiment, the main material of the multi-turn locking device is 316 stainless steel, which has particularly good corrosion resistance, atmospheric corrosion resistance, and high-temperature strength, and can be used under harsh conditions.
[0024] The working principle of this embodiment is as follows:
[0025] Flip the flip cover 4 to 0° to cover the valve housing 6, align the lock groove opening 20 of the flip cover 4 with the mating groove opening 21 of the valve housing 6. At this time, insert and rotate the key 11 into the lock core 16 (and the special-shaped lock tongue 15), so that one end of the special-shaped lock tongue 15 extends into the mating groove opening 21 (that is, the special-shaped lock tongue 15 is stuck between the lock groove opening 20 and the mating groove opening 21), thereby restricting the flipping of the flip cover 4, that is, locking and fixing the flip cover 4 to the valve housing 6. At this time, the valve is locked; conversely, insert and rotate the key 11 into the lock core 16 (and the special-shaped lock tongue 15), so that one end of the special-shaped lock tongue 15 withdraws from the mating groove opening 21, thereby releasing the connection between the flip cover 4 and the movable end of the valve housing 6, that is, lifting the flipping restriction of the flip cover 4. At this time, the flip cover 4 can be flipped outwards to the 180° position, and the valve is in the unlocked state at this time. At this time, a corresponding handle assembly can be connected to the valve (that is, connected to the valve rod assembly in the valve housing 6) to open and close the valve.
[0026] In practical applications, components such as a valve stem 19, a valve stem nut 10, a valve end adapter 9, and a main shaft 7 are provided in the valve housing 6 of the multi-turn small-bore valve. There is a toothed groove above the end of the main shaft 7, and an arc groove is provided on the outer contour of the end of the main shaft 7. The valve stem nut 10 is fixed to the end of the valve stem 19. The threaded end of the valve stem nut 10 is screwed into the internal thread of the flange end of the main shaft 7. The waist-shaped end of the valve stem nut 10 is adapted and linked with the valve end adapter 9. The flange end of the main shaft 7 and the valve end adapter 9 are connected by an internal hexagonal screw 8. The handle assembly includes a handle body 1 and a handle sleeve 2, which are connected. A ball screw 3 is provided inside the handle sleeve 2; when installing the handle, dock the handle sleeve 2 with the main shaft 7 of the valve, so that the ball of the ball screw 3 is pressed into the arc groove of the main shaft 7 to prevent the handle from coming off.
[0027] The beneficial effects of this embodiment are as follows:
[0028] 1. This device adopts a modular design and is compatible with different types of multi-turn small-bore valves;
[0029] 2. Without modifying or damaging the original equipment, it is customized, easy to install, flexible to operate, can effectively prevent accidental touch and random rotation operation, and is safe and reliable;
[0030] 3. Use mechanical limit to achieve interlock, with high reliability and long service life, and can be used under harsh conditions;
[0031] 4. There is no disassembly part in the exposed part of the multi-turn locking device. Only by obtaining the authorized key 11 and unlocking the special-shaped lock tongue 15 and opening the flip cover 4 can the valve be opened, closed or disassembled, etc. The safety performance of the structure is strong.
[0032] Embodiment Two
[0033] The difference between this embodiment and the first embodiment is that the multi-rotation locking device further comprises a locking pin 14 , which is connected to the flip cover 4 . When the flip cover 4 rotates to cover the valve housing 6 , the locking pin 14 is inserted into the toothed groove of the main shaft 7 in the valve housing 6 .
[0034] In this embodiment, the locking pin 14 is rigidly fixed to the flip cover 4, and the two can be welded or integrally formed.
[0035] The working principle of this embodiment is as follows:
[0036] The flip cover 4 is flipped to 0° to cover the valve housing 6, so that the lock notch 20 of the flip cover 4 is aligned with the matching notch 21 of the valve housing 6, and the lock pin 14 is inserted into the toothed groove of the main shaft 7 to achieve self-locking. At this time, the key 11 is inserted and the lock core 16 (and the special-shaped lock tongue 15) is rotated, so that one end of the special-shaped lock tongue 15 extends into the matching notch 21 (that is, the special-shaped lock tongue 15 is stuck between the lock notch 20 and the matching notch 21), thereby limiting the flipping of the flip cover 4, that is, the flip cover 4 and the valve housing 6 are locked and fixed, and the valve is locked at this time. On the contrary, by inserting the key 11 and rotating the lock core 16 (and the special-shaped lock tongue 15), one end of the special-shaped lock tongue 15 is withdrawn from the matching notch 21, thereby loosening the connection between the flip cover 4 and the movable end of the valve housing 6, that is, releasing the flip restriction of the flip cover 4. At this time, the flip cover 4 can be flipped outward to a position of 180°, and the lock pin 14 is disengaged from the toothed groove, and the valve is in an unlocked state. At this time, the corresponding handle assembly can be used to connect the valve (that is, connected to the valve stem assembly in the valve housing 6) to open and close the valve.
[0037] The beneficial effects of this embodiment are as follows:
[0038] 1. The main shaft 7 cooperates with the lock pin 14 to achieve self-locking, which can not only ensure the structure is safer and more reliable together with the special-shaped lock tongue 15, but also offset the lifting force when the valve stem nut 10 drives the valve stem to rotate when opening and closing the valve;
[0039] 2. Provides a variety of locking methods, more convenient to use and more applicable.
[0040] Embodiment 3
[0041] The difference between this embodiment and the second embodiment is that the lock pin 14 and the flip cover 4 are not rigidly fixed, and one end of the lock pin 14 passes through and extends out of the flip cover 4; the multi-rotation locking device also includes an outer cover 12 and a spring 13, wherein the outer cover 12 is fixed on the flip cover 4, the spring 13 is arranged in the outer cover 12, one end of the lock pin 14 is connected to the spring 13, and the other end is sleeved in the flip cover 4.
[0042] In this embodiment, the outer cover 12 is cylindrical and welded to the flip cover 4. When the flip cover 4 rotates to cover the valve housing 6, the locking pin 14 is pressed downward into the toothed groove of the main shaft 7 under the elastic force of the spring 13 to lock the main shaft 7.
[0043] The working principle of this embodiment is as follows:
[0044] Flip the flip cover 4 to 0° to cover the valve housing 6, so that the locking groove opening 20 of the flip cover 4 is aligned with the mating groove opening 21 of the valve housing 6. At the same time, the locking pin 14 is pressed downward into the toothed groove of the main shaft 7 under the elastic force of the spring 13 to achieve self-locking. At this time, insert and rotate the key 11 into the lock core 16 (and the special-shaped locking tongue 15), so that one end of the special-shaped locking tongue 15 extends into the mating groove opening 21 (that is, the special-shaped locking tongue 15 is stuck between the locking groove opening 20 and the mating groove opening 21), thereby restricting the flipping of the flip cover 4, that is, locking and fixing the flip cover 4 to the valve housing 6. At this time, the valve is locked; conversely, insert and rotate the key 11 into the lock core 16 (and the special-shaped locking tongue 15), so that one end of the special-shaped locking tongue 15 withdraws from the mating groove opening 21, thereby loosening the connection between the movable end of the flip cover 4 and the valve housing 6, that is, releasing the flipping restriction of the flip cover 4. At this time, the flip cover 4 can be flipped outward to the 180° position, and at the same time, the locking pin 14 disengages from the toothed groove, and the valve is in the unlocked state at this time. At this time, a corresponding handle assembly can be connected to the valve (that is, connected to the valve rod assembly in the valve housing 6) to open and close the valve.
[0045] The beneficial effects of this embodiment are as follows:
[0046] 1. The self-locking is achieved through the cooperation of the main shaft 7 and the locking pin 14, which can not only ensure the structure is safer and more reliable together with the special-shaped locking tongue 15, but also offset the lifting force when the valve rod nut 10 drives the valve rod to rotate when opening and closing the valve;
[0047] 2. Multiple locking methods are provided, which are more convenient to use, have stronger applicability, the structural design is more standardized and reasonable, and it is more adaptable to the valve structure.
[0048] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims
1. A multi-turn locking device, mounted on a valve housing (6), characterized in that: The multi-turn locking device comprises a flap (4) and a valve lock. The flap (4) is hinged to the valve housing (6). A lock notch (20) is provided on the flap (4). The valve lock is fixed to the flap (4). The valve lock comprises a lock core (16) and a special-shaped lock tongue (15). The two are fixed. A matching notch (21) is provided on the valve housing (6). When the lock notch (20) and the matching notch (21) are aligned, the lock core (16) is inserted and rotated by a key (11), so that one end of the special-shaped lock tongue (15) extends into or out of the matching notch (21), thereby locking or releasing the flap (4) and the valve housing (6).
2. The multi-turn locking device according to claim 1, characterized in that: It also comprises a locking pin (14) which is connected to the flip cover (4). When the flip cover (4) rotates to cover the valve housing (6), the locking pin (14) is inserted into the toothed groove of the main shaft (7) in the valve housing (6).
3. The multi-turn locking device according to claim 2, characterized in that: The locking pin (14) is rigidly fixed to the flip cover (4).
4. The multi-turn locking device according to claim 2, characterized in that: It also comprises an outer cover (12) and a spring (13), wherein the outer cover (12) is fixed on the flip cover (4), the spring (13) is arranged in the outer cover (12), and one end of the lock pin (14) is connected to the spring (13) and the other end is sleeved in the flip cover (4).
5. The multi-turn locking device according to claim 1, characterized in that: The valve lock also includes a lock body, the lock body is fixed to the flip cover (4), and the lock core (16) is installed in the lock body.
6. The multi-turn locking device according to claim 1, characterized in that: The lock core (16) and the special-shaped lock tongue (15) are tightened and fixed by using a recessed pull tab (17) and a countersunk hexagon socket screw (18).