Valve with locking and fixing functions

Abstract

The utility model relates to the technical field of valves, in particular to a valve with a locking and fixing function. Comprising a valve body, a valve rod, a hand wheel and a locking mechanism. One end of the valve rod is arranged in the valve body, and the other end of the valve rod extends out of the valve body and is fixedly connected with the hand wheel; the locking mechanism is arranged outside the valve rod in a sleeving mode and located between the valve body and the hand wheel. A plurality of limiting blocks are arranged on the locking mechanism, a limiting ring is arranged at the bottom of the hand wheel, a plurality of limiting grooves are formed in the limiting ring, and the limiting blocks can be inserted into the limiting grooves. The locking mechanism is arranged between the hand wheel and the valve body, and the limiting block arranged on the locking mechanism is clamped with the limiting groove formed in the bottom of the hand wheel, so that the hand wheel is locked and fixed when the valve is maintained, and the situation that the valve is opened due to the fact that other workers open the hand wheel by mistake or reset due to external force collision is prevented; and safety accidents that fingers of maintenance workers are pinched and the like are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve with locking and fixing functions. Background Art

[0002] The valve is a control component in the fluid delivery system, which has the functions of shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. The valves used in fluid control systems are of various types and specifications, from the simplest shutoff valve to the various valves used in extremely complex automatic control systems. However, most existing valves do not have a locking and fixing function. During the process of troubleshooting the valve, the valve is usually closed to facilitate maintenance personnel to perform maintenance. If the valve is opened due to misoperation by other staff or external force collision during the maintenance process, there will be a safety hazard of pinching the fingers of the maintenance personnel. Therefore, the utility model is proposed. Utility Model Content

[0003] The utility model aims to provide a valve with a locking and fixing function, which can be locked and fixed to avoid safety accidents such as pinching fingers of maintenance workers.

[0004] The utility model provides a valve with a locking and fixing function, comprising a valve body, a valve stem, a handwheel and a locking mechanism; one end of the valve stem is arranged in the valve body, and the other end of the valve stem extends out of the valve body and is fixedly connected to the handwheel; the locking mechanism is sleeved on the outside of the valve stem and is located between the valve body and the handwheel; a plurality of limit blocks are provided on the locking mechanism, a limit ring is provided at the bottom of the handwheel, a plurality of limit grooves are provided on the limit ring, and the limit blocks can be inserted into the limit grooves.

[0005] Furthermore, the locking mechanism comprises a telescopic tube, the top of the telescopic tube is provided with the limit block, the bottom of the telescopic tube is fixed with an annular mounting plate, and the annular mounting plate is fixedly connected to the top of the valve body.

[0006] Furthermore, the telescopic tube includes a first tube body and a second tube body, the bottom of the first tube body is fixedly connected to the annular mounting plate; the second tube body is slidably connected to the inner wall of the first tube body, and the limit block is fixed to the top of the second tube body; a positioning assembly is provided between the first tube body and the second tube body.

[0007] Furthermore, the positioning assembly includes positioning holes and spring plungers, the upper part of the first tube body is provided with a plurality of the positioning holes along the circumferential direction, the lower part of the outer wall of the second tube body is provided with a plurality of the spring plungers along the circumferential direction, and the spring plungers can be inserted into the positioning holes.

[0008] Furthermore, it also includes a reinforcement piece, which is a U-shaped rod, and the U-shaped rod is clamped on the connecting rib of the hand wheel, and the two ends of the U-shaped rod are clamped with the annular mounting plate.

[0009] Furthermore, the annular mounting plate is provided with two mounting grooves, and the two ends of the U-shaped rod are respectively inserted into the mounting grooves.

[0010] Furthermore, a tightening bolt is provided on a side wall of the installation groove, and the tightening bolt is connected to the U-shaped rod.

[0011] Furthermore, an unlocking ring is slidably connected to the outside of the first tube body, and the unlocking ring is provided with a plurality of through holes corresponding to the positioning holes, and a push block is provided in the through hole.

[0012] Furthermore, a sliding groove is provided on the side wall of the through hole, and the push block is slidably connected in the sliding groove.

[0013] Furthermore, a return spring is fixed on the side wall of the slide groove close to the first tube body, and the push block is fixedly connected to the return spring.

[0014] In summary, compared with the prior art, the utility model has the following advantages:

[0015] The technical solution of the utility model is to provide a locking mechanism between the handwheel and the valve body, and a limit block provided on the locking mechanism is clamped with a limit groove provided at the bottom of the handwheel. When the valve is repaired, the handwheel is locked and fixed to prevent other staff from accidentally opening the handwheel or external force collision and resetting to cause the valve to open, thereby avoiding safety accidents such as pinching the fingers of the maintenance staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the valve in Example 1 of the utility model;

[0018] Figure 2 This is a disassembly diagram of the locking mechanism in Example 1 of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the locking mechanism in Example 1 of the utility model when locking the hand wheel;

[0020] Figure 4 This is a schematic diagram of the structure of the valve in Example 2 of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the first tube body in Example 3 of the utility model;

[0022] Figure 6 It is a cross-sectional view of the unlocking ring in Example 3 of the utility model.

[0023] Explanation of the reference numerals: 1-valve body; 2-valve stem; 3-hand wheel; 4-locking mechanism; 401-limiting block; 402-first tube body; 403-second tube body; 404-annular mounting plate; 4041-mounting groove; 4042-tightening bolt; 405-positioning hole; 406-spring plunger; 5-limiting ring; 6-U-shaped rod; 7-unlocking ring; 701-through hole; 702-slide groove; 703-push block; 704-reset spring. DETAILED DESCRIPTION

[0024] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Example 1

[0028] A valve with locking and fixing function, such as Figure 1 As shown, it includes a valve body 1, a valve stem 2, a hand wheel 3 and a locking mechanism 4; a valve cover is fixed on the top of the valve body 1, one end of the valve stem 2 passes through the valve cover and is arranged in the valve body 1, and the other end extends out of the valve body 1 and is fixedly connected to the hand wheel 3, and the valve stem 2 is used to control the opening size of the valve; the locking mechanism 4 is sleeved on the valve stem 2 and is located between the valve body 1 and the hand wheel 3; a limit block 401 is provided on the locking mechanism 4, and a limit ring 5 is fixed at the bottom of the hand wheel 3, and the limit ring 5 is sleeved on the outside of the valve stem 2, as shown in FIG. Figure 2 and Figure 3 As shown ( Figure 2 and Figure 3 The handwheel is omitted in the figure, and a limiting groove is provided at the bottom of the limiting ring 5, and the limiting block 401 can be inserted into the limiting groove. The limiting block 401 is engaged with the limiting groove to realize the positioning of the handwheel 3, avoid the problem that the handwheel 3 is easily reset by external force collision and causes the valve to open, and ensure the safety of the maintenance personnel.

[0029] like Figure 2 and Figure 3 As shown, the locking mechanism 4 includes a telescopic tube and an annular mounting plate 404, the telescopic tube includes a first tube body 402 and a second tube body 403; a threaded hole is provided on the annular mounting plate 404, and is fixedly connected to the valve cover of the valve body 1 by bolts; the first tube body 402 is fixed on the top of the annular mounting plate 404, the second tube body 403 is slidably connected to the inner wall of the first tube body 402, and a limiting block 401 is fixed on the top of the second tube body 403. A sliding groove can be provided on the inner wall of the first tube body 402, and a slider is provided on the outer wall of the second tube body 403. The slider and the sliding groove ensure that the second tube body 403 can slide smoothly inside the first tube body 402.

[0030] A positioning assembly is also provided between the first tube body 402 and the second tube body 403. The positioning assembly in this embodiment includes a positioning hole 405 and a spring plunger 406. The upper part of the first tube body 402 is evenly provided with a plurality of positioning holes 405 along the circumferential direction, and the lower part of the outer wall of the second tube body 403 is evenly provided with a plurality of spring plungers 406 along the circumferential direction. The spring plunger 406 can be inserted into the positioning hole 405. When the hand wheel 3 needs to be locked and fixed, the second tube body 403 is slid upward, the spring plunger 406 is inserted into the corresponding positioning hole 405, and the limit block 401 is inserted into the limit groove at the same time, and the telescopic tube is kept at a certain height to fix the hand wheel. When the hand wheel 3 does not need to be fixed, the spring plunger 406 is directly pushed inward to disengage the spring plunger 406 from the positioning hole 405, and the second tube body 403 is slid downward to reduce the height of the telescopic tube to the initial state. During design and production, the height of the second tube 403, the position of the positioning hole 405 and the spring plunger 406 need to ensure that the spring plunger 406 is inserted into the positioning hole 405, and at least half of the height of the limiting block 401 can be inserted into the limiting groove.

[0031] In order to increase the stability of the connection, four limit blocks and four limit grooves are set on the limit ring 5, and the limit blocks and the limit grooves are evenly spaced at the bottom of the limit ring 5. At the same time, four limit blocks and four limit grooves are also set on the top of the second tube body 403. The limit blocks and limit grooves on the limit ring 5 correspond to the limit grooves and limit blocks at the top of the second tube body 403 respectively.

[0032] When repairing the valve in this embodiment, close the valve, slide the second tube body 403 upward, insert the spring plunger 406 into the positioning hole 405, and at the same time, make the second tube body 403 and the limiting block on the limiting ring 5 engage with the limiting groove, complete the locking and fixing of the hand wheel 3, and then carry out the repair work. After the repair work is completed, push the spring plunger 406 inward to disengage the spring plunger 406 from the positioning hole 405, slide the second tube body 403 downward to separate the limiting block from the limiting groove, release the locking and fixing of the hand wheel 3, and adjust the valve according to normal operation.

[0033] The limit block 401 provided in this embodiment is fixedly connected, and the second tube body 403 can only slide vertically upward or downward, so it is only suitable for locking and fixing the hand wheel when the valve is fully closed.

[0034] Example 2

[0035] A valve with locking and fixing function, such as Figure 4 As shown, the technical solution of this embodiment is basically the same as that of embodiment 1, except that a reinforcement is also provided in this embodiment to provide double protection to avoid the problem that the locking effect cannot be guaranteed when the spring plunger 406 of the locking mechanism 4 fails.

[0036] In this embodiment, the reinforcement member is a U-shaped rod 6, which is clamped on the connecting rib of the hand wheel 3, and the two ends of the U-shaped rod 6 are clamped with the annular mounting plate 404. Two mounting grooves 4041 are fixed on the annular mounting plate 404, and the two ends of the U-shaped rod 6 are respectively inserted into one mounting groove 4041. The side wall of the mounting groove 4041 is provided with a tightening bolt 4042, and the end of the U-shaped rod 6 is provided with a threaded hole matched with the tightening bolt 4042. The tightening bolt 4042 is provided to make the connection between the U-shaped rod 6 and the mounting groove 4041 more stable.

[0037] The method of using the valve in this embodiment is as follows: when the valve needs to be repaired, close the valve, clamp the U-shaped rod 6 on one of the connecting ribs of the hand wheel 3, and insert the two ends of the U-shaped rod 6 into the corresponding installation grooves 4041 respectively, and fix them with tightening bolts 4042, and then adjust the locking mechanism 4 to make the limit block engage with the limit groove, and lock and fix the hand wheel 3. After the maintenance is completed, first separate the limit block from the limit groove, and finally rotate the tightening bolts 4042 to separate it from the U-shaped rod 6, remove the U-shaped rod 6, release the locking fixation of the hand wheel 3, and adjust the valve according to normal operation.

[0038] In this embodiment, the hand wheel 3 is quickly locked and fixed by the U-shaped rod 6, and double protection is provided to avoid the problem that the locking mechanism 4 fails and causes poor locking and fixing effect of the hand wheel 3.

[0039] Example 3

[0040] A valve with a locking and fixing function. The technical solution in this embodiment is basically the same as that in Embodiment 2, except that an unlocking ring 7 is also provided in this embodiment to quickly separate the spring plunger 406 from the positioning hole 405.

[0041] like Figure 5 As shown, the unlocking ring 7 is sleeved on the outside of the first tube 402, and is slidably connected to the first tube 405 by providing a sliding groove and a slider. Figure 6 As shown, the unlocking ring 7 is provided with a plurality of through holes 701, each of which corresponds to a positioning hole 405. A slide groove 702 is provided on the side wall of the through hole 701, and a push block 703 is slidably connected in the slide groove 702. The push block 703 in this embodiment is L-shaped, and the vertical section of the push block 703 is aligned with the central axis of the through hole 701, and the horizontal section of the push block 703 is slidably connected with the slide groove 702. A return spring 704 is fixed on the side wall of the slide groove 702 close to the first tube body 402, and one end of the return spring 704 is fixed to the horizontal section of the push block 703. When in use, the unlocking ring 7 is slid upward to align the through hole 701 with the positioning hole 405, and the push block 703 is pushed. The push block 703 pushes the spring plunger 406 out of the positioning hole 405, and the spring plunger 406 can be quickly separated from the positioning hole 405, so that the limit block is separated from the limit groove.

[0042] The method of using the valve in this embodiment is as follows: after the valve maintenance work is completed, slide the unlocking ring 7 upward to align the through hole 701 with the positioning hole 405, push the push block 703 in the through hole 701, and make one end of the push block 703 extend from the through hole 701 into the positioning hole 405 to push the spring plunger 406, so that the spring plunger 406 is separated from the positioning hole 405, and at the same time slide the second tube body 403 downward to separate the limit block 401 from the limit groove, thereby completing the unlocking of the locking mechanism 4; after the unlocking is completed, release the push block 703, and the push block 703 returns to the through hole 701 under the action of the reset spring 704. When unlocking using the unlocking ring 7, each time a push block 703 is pushed to a suitable position, an auxiliary tool such as a bolt or a steel bar can be inserted into the through hole 701 to position the push block 703 to prevent one of the push blocks from returning to its initial state (i.e., the push block 703 is located as a whole in the through hole 701) under the action of the reset spring 704 when operating other push blocks. After each set of spring plungers 406 are separated from the positioning holes 405, the auxiliary tools can be removed at the same time.

[0043] The valve with locking and fixing function provided by the utility model is provided with a locking mechanism, which uses a limit block and a limit groove to lock and fix the hand wheel, thereby preventing other staff from operating the hand wheel incorrectly during maintenance and causing the fingers of the maintenance staff to be pinched. The set reinforcement piece provides double protection to avoid the problem of poor locking effect caused by failure of the spring plunger on the locking mechanism. The unlocking ring is used to quickly unlock the locking mechanism, which is more convenient to use.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A valve with locking and fixing function, characterized in that: The valve body (1) comprises a valve stem (2), a hand wheel (3) and a locking mechanism (4); one end of the valve stem (2) is arranged in the valve body (1), and the other end of the valve stem (2) extends out of the valve body (1) and is fixedly connected to the hand wheel (3); the locking mechanism (4) is sleeved on the outside of the valve stem (2) and is located between the valve body (1) and the hand wheel (3); a plurality of limit blocks (401) are arranged on the locking mechanism (4), a limit ring (5) is arranged at the bottom of the hand wheel (3), a plurality of limit grooves are arranged on the limit ring (5), and the limit blocks (401) can be inserted into the limit grooves.

2. The valve with locking and fixing function according to claim 1, characterized in that: The locking mechanism (4) comprises a telescopic tube, the top of which is provided with the limit block (401), the bottom of which is fixed with an annular mounting plate (404), and the annular mounting plate (404) is fixedly connected to the top of the valve body (1).

3. The valve with locking and fixing function according to claim 2, characterized in that: The telescopic tube comprises a first tube body (402) and a second tube body (403); the bottom of the first tube body (402) is fixedly connected to the annular mounting plate (404); the second tube body (403) is slidably connected to the inner wall of the first tube body (402); the limit block (401) is fixed to the top of the second tube body (403); and a positioning assembly is provided between the first tube body (402) and the second tube body (403).

4. The valve with locking and fixing function according to claim 3, characterized in that: The positioning assembly comprises positioning holes (405) and spring plungers (406); the upper portion of the first tube body (402) is provided with a plurality of the positioning holes (405) along the circumferential direction; the lower portion of the outer wall of the second tube body (403) is provided with a plurality of the spring plungers (406) along the circumferential direction; the spring plungers (406) can be inserted into the positioning holes (405).

5. The valve with locking and fixing function according to claim 2, characterized in that: It also includes a reinforcement piece, which is a U-shaped rod (6). The U-shaped rod (6) is clamped on the connecting rib of the hand wheel (3), and the two ends of the U-shaped rod (6) are clamped with the annular mounting plate (404).

6. The valve with locking and fixing function according to claim 5, characterized in that: The annular mounting plate (404) is provided with two mounting grooves (401), and the two ends of the U-shaped rod (6) are respectively inserted into the mounting grooves (4041).

7. The valve with locking and fixing function according to claim 6, characterized in that: A tightening bolt (4042) is provided on the side wall of the installation groove (4041), and the tightening bolt (4042) is connected to the U-shaped rod (6).

8. The valve with locking and fixing function according to claim 4, characterized in that: The outside of the first tube body (402) is slidably connected to an unlocking ring (7), and the unlocking ring (7) is provided with a plurality of through holes (701) corresponding to the positioning holes (405), and a push block (703) is provided in the through hole (701).

9. The valve with locking and fixing function according to claim 8, characterized in that: A sliding groove (702) is provided on the side wall of the through hole (701), and the push block (703) is slidably connected in the sliding groove (702).

10. The valve with locking and fixing function according to claim 9, characterized in that: A return spring (704) is fixed on the side wall of the slide groove (702) close to the first tube body (402), and the push block (703) is fixedly connected to the return spring (704).

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