Multi-turn locking device

Abstract

A multi-turn locking device, relating to the technical field of valve protection. The multi-turn locking device comprises a flip cover and a valve lock. The flip cover is hinged to a valve housing, and is provided with a lock notch. The valve lock is fixed to the flip cover, and comprises a lock cylinder and a profiled bolt, the lock cylinder and the profiled bolt being fixed together. The valve housing is provided with a fitting notch. When the lock notch and the fitting notch are aligned with each other, by inserting a key and rotating the lock cylinder, one end of the profiled bolt extends into or disengages from the fitting notch, thereby locking and fixing or releasing the flip cover and the valve housing.

Description

Multi-rotation locking device TECHNICAL FIELD

[0001] The present application relates to the technical field of valve protection, in particular to a multi-rotation locking device. BACKGROUND

[0002] There are a large number of manually operated devices such as valves in the petroleum, chemical, power and high-risk manufacturing industries. Accidents caused by misoperation are common, and according to statistics, 70% of accidents in the petroleum and natural gas industries are caused by human operation errors. With the rapid development of modern industry, users hope to have a device that does not change or damage the original valve equipment and reduces human misoperation.

[0003] Investigation shows that most small-diameter valves do not have valve limiting devices. These valves will mostly appear self-closing or self-opening phenomenon when installed on a pipeline with large flow, high pressure and vibration, so there is an urgent need for a locking device to prevent the valve from self-closing or self-opening and to improve the reliability of the valve. SUMMARY

[0004] In view of the above-mentioned deficiencies existing at present, the present application provides a multi-rotation locking device which can realize the limitation of opening or closing of a multi-rotation small-diameter valve, effectively prevent accidental touch and random rotation operation, is safe and reliable, can be customized on the basis of not changing 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-mentioned purpose, the embodiments of the present application adopt the following technical solutions:

[0006] The multi-rotation locking device is installed on a valve housing, and comprises a flip cover and a valve lock. The flip cover is hinged to the valve housing, and a lock slot is arranged on the flip cover. The valve lock is fixed to the flip cover, and comprises a lock core and a special-shaped lock tongue which are fixed together. A matching slot is arranged on the valve housing. When the lock slot and the matching slot are aligned, the lock core is inserted and rotated by a key, so that one end of the special-shaped lock tongue extends into or separates from the matching slot, thereby locking and fixing the flip cover to the valve housing or loosening the connection between the flip cover and the valve housing.

[0007] According to one aspect of the present application, a lock pin is further included, which is connected to the flip cover. When the flip cover is rotated to cover the valve housing, the lock pin is inserted into a tooth-shaped slot of a main shaft of the valve housing.

[0008] According to one aspect of the present application, the lock pin is rigidly fixed to the flip cover.

[0009] According to one aspect of the present application, 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, and 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 application, the valve lock further comprises a lock body fixed with the cover, and the lock cylinder is installed in the lock body.

[0011] According to one aspect of the present application, the lock cylinder and the special-shaped lock tongue are fixed by a sunken groove pull piece and a countersunk head internal hexagonal screw.

[0012] The advantages of the present application are as follows: when the valve hand wheel or valve rod is not concentric with the remote transmission shaft, the remote transmission shaft will swing in the center of the adapter when the remote transmission mechanism is operated, that is, the swing shaft will not be in the center position of the fixed disc, the rotation torque of the remote transmission shaft is transmitted to the fixed disc through the yoke connected with the swing shaft, and then transmitted to the valve hand wheel or valve rod, so as to finally realize the opening or closing of the valve; in this way, the adapter can reduce the use of universal joints or couplings, reduce the use cost, and solve the problems of small installation adapter space and installation deviation of the traditional remote transmission mechanism; the adapter can not only have the function of adjusting the universal joint, but also can use the original space, and has the advantages of simple structure and reliability. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0014] Fig. 1 is a structural schematic view of the lock valve state in the application;

[0015] Fig. 2 is a sectional structural schematic view of the lock valve state in the application;

[0016] Fig. 3 is a structural schematic view of the unlock valve state in the application.

[0017] The names corresponding to the serial numbers in the drawings are as follows:

[0018] 1, handle body; 2, handle sleeve; 3, wave bead screw; 4, cover; 5, knurled pin; 6, valve housing; 7, main shaft; 8, internal hexagonal screw; 9, valve end adapter; 10, valve rod nut; 11, key; 12, cover; 13, spring; 14, lock pin; 15, special-shaped lock tongue; 16, lock cylinder; 17, sunken groove pull piece; 18, countersunk head internal hexagonal screw; 19, valve rod; 20, lock slot; 21, matching slot. DETAILED DESCRIPTION

[0019] With reference to the accompanying drawings, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of the present application.

[0020] Embodiment one

[0021] As shown in FIG. 1, FIG. 2 and FIG. 3, the multi-rotation locking device is installed on the valve housing 6 of the multi-rotation small-bore valve to limit the opening or closing of the small-bore valve, effectively preventing accidental touch and random rotation operation. The multi-rotation locking device comprises a flap 4 and a valve lock. The flap 4 is hinged to the valve housing 6 through a knurled pin 5, and the flap 4 can be turned by 180°. The flap 4 is provided with a lock slot 20 in the shape of an arc-shaped groove. The valve lock is fixed to the flap 4, and the valve lock comprises a lock body, a lock cylinder 16 and a special-shaped lock tongue 15. The lock body is welded and fixed to the flap 4, the lock cylinder 16 is fitted in the lock body, the special-shaped lock tongue 15 and the lock cylinder 16 are fixed by a sunken slot pull tab 17 and a countersunk head hexagonal screw 18, and the special-shaped lock tongue 15 and the lock cylinder 16 are adapted to linkage and can be rotated by 0°-90° by a key 11. The valve housing 6 is provided with a matching slot 21. When the flap 4 is at 0° or covers the valve housing 6, that is, when the lock slot 20 of the flap 4 is aligned with the matching slot 21 of the valve housing 6, the lock cylinder 16 (and the special-shaped lock tongue 15) is inserted and rotated by the key 11, so that one end of the special-shaped lock tongue 15 extends into or out of the matching slot 21, thereby locking and fixing the flap 4 to the valve housing 6 or loosening the connection between the flap 4 and the valve housing 6. When the device is used, the authorized key 11 is controlled to supervise and limit the multi-rotation small-bore valve, so that the valve can be opened or closed only when it meets the predetermined process requirements.

[0022] In this embodiment, the key 11 and the lock cylinder 16 are unique. The special-shaped lock tongue 15 is in the shape of an integrated combination of a square plate and a triangular plate or a trapezoidal plate. The matching slot 21 is a wide slot or a rectangular slot, and its structure and shape are adapted to the structure and shape of the lock slot 20. The lock body is in the shape of a cylindrical cylinder, which can install, protect and dustproof the internal components such as the lock cylinder 16. The inscription content on the faceplate of the key 11 and the dust cover of the lock cylinder 16 or the faceplate of the lock body can be customized to meet the coding needs of customers for different equipment.

[0023] In this embodiment, the main material of the multi-rotation locking device is 316 stainless steel, which has excellent corrosion resistance, atmospheric corrosion resistance and high temperature strength, and can be used in harsh conditions.

[0024] The working principle of the embodiment is as follows:

[0025] The flip cover 4 is turned to 0° to cover the valve housing 6, so that the lock slot 20 of the flip cover 4 and the matching slot 21 of the valve housing 6 are aligned, at this time, the lock core 16 (and the special-shaped lock tongue 15) is inserted and rotated by the key 11, so that one end of the special-shaped lock tongue 15 extends into the matching slot 21 (that is, the special-shaped lock tongue 15 is clamped between the lock slot 20 and the matching slot 21), thereby limiting the turning of the flip cover 4, that is, the flip cover 4 is locked and fixed with the valve housing 6, at this time the valve is locked; conversely, the lock core 16 (and the special-shaped lock tongue 15) is inserted and rotated by the key 11, so that one end of the special-shaped lock tongue 15 exits the matching slot 21, thereby releasing the connection between the flip cover 4 and the movable end of the valve housing 6, that is, the turning of the flip cover 4 is released, at this time the flip cover 4 can be turned outward to a position of 180°, and at this time the valve is in an unlocked state, at this time a corresponding handle assembly can be used to connect with the valve (that is, connected with the valve rod assembly in the valve housing 6) to open and close the valve.

[0026] In actual application, the valve housing 6 of the multi-rotation small-bore valve is provided with valve stem 19, valve stem nut 10, valve end adapter 9, main shaft 7 and other components, the top of the end of the main shaft 7 is provided with a tooth-shaped groove, the outer contour of the end of the main shaft 7 is provided with a circular arc groove, the valve stem nut 10 is fixed at the end of the valve stem 19, the threaded end of the valve stem nut 10 is screwed with 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, and the flange end of the main shaft 7 is connected with the valve end adapter 9 through the internal hexagonal screw 8. The handle assembly includes a handle body 1 and a handle sleeve 2, which are connected, and the handle sleeve 2 is provided with a wave bead screw 3; when the handle is to be installed, the handle sleeve 2 is butted with the main shaft 7 of the valve, so that the ball of the wave bead screw 3 is pressed into the circular arc groove of the main shaft 7, thereby preventing the handle from being pulled out.

[0027] The beneficial effects of the embodiment are as follows:

[0028] The device adopts modular design and is compatible with different types of multi-rotation small-bore valves;

[0029] The original equipment is not damaged or destroyed, and the device is tailor-made, simple to install, flexible to operate, safe and reliable, and can effectively prevent accidental touch and random rotation operation;

[0030] The mechanical limit is used to realize interlocking, has high reliability and long service life, and can be used in harsh conditions;

[0031] The exposed part of the multi-rotation locking device has no disassembly part, and only when the authorized key 11 is obtained and the special-shaped lock tongue 15 is unlocked and the flip cover 4 is opened, the valve can be opened and closed or disassembled, and the safety performance of the structure is strong.

[0032] Embodiment two

[0033] The difference between the embodiment and the embodiment one is that the multi-rotation locking device further comprises a locking pin 14, which is connected with the cover 4, and when the cover 4 is rotated to cover the valve housing 6, the locking pin 14 is inserted into the tooth-shaped groove of the main shaft 7 of the valve housing 6.

[0034] In the embodiment, the locking pin 14 is rigidly fixed with the cover 4, and the two can be welded or integrally formed.

[0035] The working principle of the embodiment is as follows:

[0036] When the cover 4 is turned to 0° to cover the valve housing 6, the locking slot 20 of the cover 4 and the matching slot 21 of the valve housing 6 are aligned, and at the same time, the locking pin 14 is inserted into the tooth-shaped groove of the main shaft 7 to achieve self-locking. At this time, by inserting and rotating the lock core 16 (and the special-shaped lock tongue 15) with the key 11, the special-shaped lock tongue 15 is inserted into the matching slot 21 (i.e. the special-shaped lock tongue 15 is clamped between the locking slot 20 and the matching slot 21), thereby limiting the turning of the cover 4, i.e. locking and fixing the cover 4 and the valve housing 6, and at this time, the valve is locked. Conversely, by inserting and rotating the lock core 16 (and the special-shaped lock tongue 15) with the key 11, the special-shaped lock tongue 15 is withdrawn from the matching slot 21, thereby releasing the connection between the cover 4 and the movable end of the valve housing 6, i.e. releasing the turning limitation of the cover 4. At this time, the cover 4 can be turned outward to a position of 180°, and at the same time, the locking pin 14 is separated from the tooth-shaped groove, and at this time, the valve is in an unlocked state. At this time, a corresponding handle assembly can be used to connect with the valve (i.e. to connect with the valve rod assembly in the valve housing 6) to open and close the valve.

[0037] The beneficial effects of the embodiment are as follows:

[0038] By cooperating with the locking pin 14, the main shaft 7 can achieve self-locking, which can not only ensure the structure to be more safe and reliable together with the special-shaped lock tongue 15, but also can offset the lifting force when the valve rod nut 10 drives the valve rod to rotate during opening and closing the valve;

[0039] A variety of locking modes are provided, which is more convenient to use and has stronger applicability.

[0040] Embodiment three

[0041] The difference between the embodiment and the embodiment two is that the locking pin 14 is not rigidly fixed with the cover 4, and one end of the locking pin 14 penetrates and extends out of the cover 4. The multi-rotation locking device further comprises an outer cover 12 and a spring 13, wherein the outer cover 12 is fixed on the cover 4, the spring 13 is arranged in the outer cover 12, one end of the locking pin 14 is connected with the spring 13, and the other end of the locking pin 14 is sleeved in the cover 4.

[0042] In the embodiment, the outer cover 12 is in a cylindrical shape and is welded with the cover 4. When the cover 4 is rotated to cover the valve housing 6, the locking pin 14 is pressed downward into the tooth-shaped groove of the main shaft 7 under the elastic force of the spring 13, thereby locking the main shaft 7.

[0043] The working principle of the embodiment is as follows:

[0044] The flip cover 4 is flipped to 0° to cover the valve housing 6, so that the lock slot 20 of the flip cover 4 and the matching slot 21 of the valve housing 6 are aligned, and the lock pin 14 is pressed downward into the tooth-shaped slot of the main shaft 7 under the elastic force of the spring 13 to achieve self-locking. At this time, the key 11 is inserted and rotated 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 matching slot 21 (i.e., the special-shaped lock tongue 15 is clamped between the lock slot 20 and the matching slot 21), thereby limiting the flipping of the flip cover 4, i.e., locking and fixing the flip cover 4 with the valve housing 6, and at this time the valve is locked. Conversely, the key 11 is inserted and rotated into the lock core 16 (and the special-shaped lock tongue 15), so that one end of the special-shaped lock tongue 15 exits the matching slot 21, thereby releasing the connection between the flip cover 4 and the movable end of the valve housing 6, i.e., releasing the flipping limitation of the flip cover 4. At this time, the flip cover 4 can be flipped outward to a position of 180°, and at the same time the lock pin 14 is separated from the tooth-shaped slot, and the valve is in an unlocked state at this time. At this time, a corresponding handle assembly can be used to connect with the valve (i.e., to connect with the valve rod assembly in the valve housing 6) to open and close the valve.

[0045] The beneficial effects of the embodiment are as follows:

[0046] The self-locking is achieved by the cooperation of the main shaft 7 and the lock pin 14, which can not only ensure the structure to be more safe and reliable together with the special-shaped lock tongue 15, but also can offset the lifting force when the valve rod nut 10 drives the valve rod to rotate;

[0047] A variety of locking modes are provided, which are more convenient to use, have stronger applicability, and have more reasonable and standardized structure design, and are more suitable for the valve structure.

[0048] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed in the present application can be easily thought of by those skilled in the art, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. Multi-rotation locking device, mounted on a valve housing (6), characterized in that, The multi-rotation locking device comprises a cover (4) and a valve lock, the cover (4) is hinged with a valve housing (6), the cover (4) is provided with a lock notch (20), the valve lock is fixed with the cover (4), the valve lock comprises a lock core (16) and a special-shaped lock tongue (15), both of which are fixed, the valve housing (6) is provided with a matching notch (21), 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 and fixing the cover (4) and the valve housing (6) or loosening the connection between the cover (4) and the valve housing (6).

2. The multi-revolution locking device of claim 1, wherein Further comprising a lock pin (14), the lock pin (14) is connected with the cover (4), when the cover (4) is rotated to cover the valve housing (6), the lock pin (14) is inserted into the tooth-shaped groove of the main shaft (7) of the valve housing (6).

3. The multi-revolution locking device of claim 2, wherein, The lock pin (14) is rigidly fixed with the cover (4).

4. The multi-revolution locking device of claim 2, wherein, Further comprising an outer cover (12) and a spring (13), the outer cover (12) is fixed on the cover (4), the spring (13) is arranged in the outer cover (12), one end of the lock pin (14) is connected with the spring (13), and the other end of the lock pin (14) is sleeved in the cover (4).

5. The multi-revolution locking device of claim 1, wherein, The valve lock further comprises a lock body, the lock body is fixed with the cover (4), and the lock core (16) is installed in the lock body.

6. The multi-revolution locking device of claim 1, wherein, The lock core (16) and the special-shaped lock tongue (15) are fixed by a sunken notch pull tab (17) and a countersunk head inner hexagonal screw (18).

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