High-pressure valve capable of preventing valve rod from retreating

Abstract

The high-pressure valve capable of preventing the valve rod from returning comprises a valve body and a hand wheel, the inner side of the hand wheel is fixedly connected with a positioning sleeve, the top of the valve body is fixedly connected with a limiting ring, the top of the inner side of the limiting ring is provided with an adjusting concave hole, the inner side of the limiting ring is provided with a movable seat, and the movable seat is fixedly connected with the positioning sleeve. A fixed ring is fixedly connected to the lower end of the outer surface of the movable seat, a positioning column is fixedly connected to the top of the fixed ring, an upper movable ring is arranged at the upper end of the inner side of the movable seat, positioning rods are fixedly connected to the periphery of the top of the upper movable ring, and springs are fixedly connected to the periphery of the bottom of the upper movable ring; and the other end of the spring is fixedly connected with a lower movable ring. The position of the valve rod can be locked through the hand wheel in an inserting and positioning mode, the structural use stability is good, frequent maintenance is not needed, meanwhile, pressing type operation is simple, and operation of a user is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure valves, in particular to a high-pressure valve capable of preventing a valve stem from retreating. Background Art

[0002] Valves are control components in fluid delivery systems and have functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. High-pressure valves are a type of valve. Because the valve body can control the flow of higher-pressure fluids, it is called a high-pressure valve. When in use, high-pressure valves are exposed to the outside world, and non-operating personnel may turn them by mistake, or the pressure may be too high, causing the valve stem to retreat, which will change the flow and affect the normal operation of the connected instruments.

[0003] The upper turntable of the above technical solution rotates synchronously with the lower turntable through a linkage assembly. The knob is turned to drive the screw and the connecting seat to rotate to change the longitudinal position of the friction check plate until its bottom end abuts against the top of the brake pad. The rotation of the lower turntable is controlled by the friction force provided by the friction check plate. However, the valve stem is prone to retraction after long-term use, which is not convenient for manual adjustment and fixing, and the combined installation is not convenient and labor-saving enough.

[0004] At present, a utility model patent with publication number CN220581818U discloses a high-pressure valve that can prevent the valve stem from retreating. By setting a threaded connection between the threaded valve stem and the first screw hole on the fixed seat, with the cooperation of the hand wheel, it is easy to adjust the threaded valve stem to move up and down, and the valve core moves up and down in the valve body to achieve internal pipeline connection or disconnection, thereby achieving fluid flow regulation. The limit seat fixes the position of the threaded valve stem with the cooperation of two fixing bolts to prevent the threaded valve stem from retreating under the action of internal pressure due to long-term use, thereby affecting the adjustment effect.

[0005] However, the structure of the existing high-pressure valve that can prevent the valve stem from retreating is easy to loosen after long-term use, and the rubber pad needs to be replaced frequently, and the operation is relatively cumbersome. Therefore, we propose a high-pressure valve that can prevent the valve stem from retreating. Utility Model Content

[0006] The utility model aims to provide a high-pressure valve capable of preventing the valve stem from retreating, which has the advantages of good locking effect and convenient operation, and solves the problem that the structure of the existing high-pressure valve capable of preventing the valve stem from retreating is easy to loosen after long-term use, and the rubber pad needs to be replaced frequently, and the operation is relatively cumbersome.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-pressure valve that can prevent the valve stem from retreating, comprising a valve body and a handwheel, a positioning sleeve fixedly connected to the inner side of the handwheel, a limiting ring fixedly connected to the top of the valve body, an adjusting recessed hole is opened at the top of the inner side of the limiting ring, a movable seat is arranged on the inner side of the limiting ring, a fixing ring is fixedly connected to the lower end of the outer surface of the movable seat, a positioning column is fixedly connected to the top of the fixing ring, an upper movable ring is arranged on the upper end of the inner side of the movable seat, positioning rods are fixedly connected to the top of the upper movable ring, springs are fixedly connected to the bottom of the upper movable ring, the other end of the spring is fixedly connected to the lower movable ring, and push plates are fixedly connected to the front and rear sides of the upper movable ring.

[0008] Preferably, both left and right ends of the valve body are fixedly connected with connecting flanges, and the inner surface of the connecting flange is provided with a mounting hole, a valve core is arranged on the inner side of the valve body, a valve stem is arranged on the top of the valve core, and a handwheel is fixedly connected to the upper end of the outer surface of the valve stem.

[0009] Preferably, there are multiple adjustment recessed holes, and the angles between two adjacent adjustment recessed holes are equal.

[0010] Preferably, the number of the positioning posts and the adjusting recessed holes is the same, and the positioning posts are inserted into the inner sides of the adjusting recessed holes.

[0011] Preferably, the positioning rod and the positioning sleeve are matched, and the positioning rod is inserted into the inner side of the positioning sleeve.

[0012] Preferably, guide grooves are provided on both the front and rear sides of the movable seat, and one end of the push plate slides on the inner side of the guide groove.

[0013] Preferably, the longitudinal section of the limiting ring is an L-shaped structure, and the fixing ring moves inside the limiting ring.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] The utility model can lock the position of the valve stem by means of a hand wheel in a plug-in positioning manner, and the structure has good stability in use and does not require frequent maintenance. At the same time, the push-type operation is simple, which is convenient for users to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model from the first perspective;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model from a second viewing angle;

[0018] Figure 3 This is a schematic diagram of the structure of the movable seat of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the limiting ring of the utility model.

[0020] In the figure: 1. valve body; 2. limit ring; 3. hand wheel; 4. valve stem; 5. positioning sleeve; 6. connecting flange; 7. valve core; 8. movable seat; 9. positioning rod; 10. spring; 11. adjusting recess; 12. fixing ring; 13. lower movable ring; 14. upper movable ring; 15. push plate; 16. guide groove; 17. positioning column. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0022] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The valve body 1, limit ring 2, handwheel 3, valve stem 4, positioning sleeve 5, connecting flange 6, valve core 7, movable seat 8, positioning rod 9, spring 10, adjustment recess 11, fixed ring 12, lower movable ring 13, upper movable ring 14, push plate 15, guide groove 16 and positioning column 17 components of the present application are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0025] See also Figure 1-4 A high-pressure valve that can prevent a valve stem from retreating comprises a valve body 1 and a hand wheel 3, a positioning sleeve 5 is fixedly connected to the inner side of the hand wheel 3, a limiting ring 2 is fixedly connected to the top of the valve body 1, an adjusting recess 11 is provided at the top of the inner side of the limiting ring 2, a movable seat 8 is arranged on the inner side of the limiting ring 2, a fixing ring 12 is fixedly connected to the lower end of the outer surface of the movable seat 8, a positioning column 17 is fixedly connected to the top of the fixing ring 12, an upper movable ring 14 is arranged on the upper end of the inner side of the movable seat 8, positioning rods 9 are fixedly connected to the top of the upper movable ring 14, springs 10 are fixedly connected to the bottom of the upper movable ring 14, the other end of the spring 10 is fixedly connected to the lower movable ring 13, and push plates 15 are fixedly connected to the front and rear sides of the upper movable ring 14.

[0026] The left and right ends of the valve body 1 are fixedly connected with connecting flanges 6, and the inner surface of the connecting flange 6 is provided with a mounting hole. A valve core 7 is arranged on the inner side of the valve body 1, and a valve stem 4 is arranged on the top of the valve core 7. The upper end of the outer surface of the valve stem 4 is fixedly connected with a handwheel 3.

[0027] Through the above technical solution, the valve can be operated conveniently through the setting of the hand wheel 3.

[0028] There are multiple adjustment recessed holes 11 , and the angles between two adjacent adjustment recessed holes 11 are equal.

[0029] Through the above technical solution, by adjusting the setting of the concave hole 11, it is convenient to adjust the position of the movable seat 8 at multiple angles.

[0030] The number of the positioning posts 17 is the same as the number of the adjusting recessed holes 11 , and the positioning posts 17 are inserted into the inner side of the adjusting recessed holes 11 .

[0031] Through the above technical solution, the position of the movable seat 8 can be positioned by setting the positioning column 17 and the adjustment recessed hole 11.

[0032] The positioning rod 9 is matched with the positioning sleeve 5 , and the positioning rod 9 is inserted into the inner side of the positioning sleeve 5 .

[0033] Through the above technical solution, through the arrangement of the positioning rod 9 and the positioning sleeve 5, the position of the valve stem 4 can be locked through the hand wheel 3.

[0034] A guide slot 16 is formed at both the front and rear sides of the movable seat 8 , and one end of the push plate 15 slides inside the guide slot 16 .

[0035] Through the above technical solution, the movement of the push plate 15 is facilitated by the provision of the guide slide groove 16 .

[0036] The longitudinal section of the limiting ring 2 is an L-shaped structure, and the fixing ring 12 moves inside the limiting ring 2 .

[0037] Through the above technical solution, the movement of the fixing ring 12 can be restricted and guided by the setting of the limiting ring 2.

[0038] When in use, the upper movable ring 14 is driven by the push plate 15 to move downward in the movable seat 8, and the spring 10 is compressed with the assistance of the lower movable ring 13. As the spring 10 is compressed, the movable seat 8 drives the fixed ring 12 to move downward synchronously in the limit ring 2 under the influence of gravity, so that the positioning column 17 exits the adjusting recess 11. Then, the valve stem 4 is driven by the hand wheel 3 to move, so that the valve core 7 seals the valve body 1. According to the position of the positioning sleeve 5, the fixed ring 12 is driven by the movable seat 8 to rotate in the limit ring 2. After the positioning rod 9 is directly below the positioning sleeve 5, the push plate 15 is released, and the spring 10 can drive the upper movable ring 14 to be tensioned and reset. While the upper movable ring 14 moves, after the top of the upper movable ring 14 contacts the top of the inner side of the movable seat 8, the movable seat 8 can be synchronously driven to move upward, so that the positioning rod 9 can be inserted into the positioning sleeve 5 and the positioning column 17 can enter the adjusting recess 11, and then the position of the valve stem 4 can be locked by the hand wheel 3.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-pressure valve capable of preventing a valve stem from retreating, comprising a valve body (1) and a hand wheel (3), characterized in that: The inner side of the hand wheel (3) is fixedly connected with a positioning sleeve (5), the top of the valve body (1) is fixedly connected with a limiting ring (2), the top of the inner side of the limiting ring (2) is provided with an adjusting recessed hole (11), the inner side of the limiting ring (2) is provided with a movable seat (8), the lower end of the outer surface of the movable seat (8) is fixedly connected with a fixing ring (12), the top of the fixing ring (12) is fixedly connected with a positioning column (17), the upper end of the inner side of the movable seat (8) is provided with an upper movable ring (14), the top of the upper movable ring (14) is fixedly connected with positioning rods (9) on all sides, the bottom of the upper movable ring (14) is fixedly connected with springs (10) on all sides, the other end of the spring (10) is fixedly connected with a lower movable ring (13), and the front and rear sides of the upper movable ring (14) are fixedly connected with push plates (15).

2. A high pressure valve capable of preventing the valve stem from retreating according to claim 1, characterized in that: The left and right ends of the valve body (1) are fixedly connected to connecting flanges (6), and the inner surface of the connecting flange (6) is provided with a mounting hole. A valve core (7) is arranged on the inner side of the valve body (1), a valve stem (4) is arranged on the top of the valve core (7), and a hand wheel (3) is fixedly connected to the upper end of the outer surface of the valve stem (4).

3. A high pressure valve capable of preventing valve stem from retreating according to claim 1, characterized in that: The number of the adjustment recessed holes (11) is multiple, and the angles between two adjacent adjustment recessed holes (11) are equal.

4. A high pressure valve capable of preventing valve stem from retreating according to claim 1, characterized in that: The number of the positioning posts (17) and the adjusting recessed holes (11) is the same, and the positioning posts (17) are inserted into the inner side of the adjusting recessed holes (11).

5. A high pressure valve capable of preventing valve stem from retreating according to claim 1, characterized in that: The positioning rod (9) and the positioning sleeve (5) are matched, and the positioning rod (9) is inserted into the inner side of the positioning sleeve (5).

6. A high pressure valve capable of preventing valve stem from retreating according to claim 1, characterized in that: The movable seat (8) is provided with guide slots (16) on both the front and rear sides, and one end of the push plate (15) slides on the inner side of the guide slot (16).

7. A high pressure valve capable of preventing valve stem from retreating according to claim 1, characterized in that: The longitudinal section of the limiting ring (2) is an L-shaped structure, and the fixing ring (12) moves inside the limiting ring (2).

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