Valve anti-seizure structure

Abstract

The utility model discloses a valve anti -slip silk structure, including valve stem and valve frame still include: base, it sets up on the valve frame, the limiting ring of being adapted with base is rotationally arranged on the valve stem, limiting clamp, it is at least three, each limiting clamp evenly distributed along the circumference of limiting ring, and along the radial direction of limiting ring outward extension setting, the circumference of base is equipped with the second through -hole of being matched with each limiting clamp clamping, the utility model provides a valve anti -slip silk structure, in the process of valve stem axial movement, when limiting ring and base contact, namely to valve stem forms axial location, restricts its to continue to drop, valve spool and valve seat in the valve have realized complete sealing closing, after the axial location of valve stem is completed, rotates limiting ring to make each limiting clamp and the second through -hole on base one -to -one and clamping cooperation, and then lock the circumferential position of limiting ring, and the maximum drop stroke of valve stem is limited through the limiting structure of this device.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically to a valve anti-slip wire structure. Background Technology

[0002] As is well known, valves are the core basic components of fluid control systems and are widely used in various industries. By adjusting the opening and closing of internal channels or cross-sectional area, they can achieve functions such as fluid shut-off, regulation, and sealing. Valves are classified into ball valves, butterfly valves, and gate valves. Among them, gate valves are forced-sealing straight-through valves and are suitable for small low-pressure systems.

[0003] The specific operation procedure of the gate valve is as follows: rotate the handwheel counterclockwise, the valve stem and valve frame drive the valve stem to rise through threaded transmission, the valve core separates from the valve seat, observe the fluid state through the pipeline pressure gauge, rotate the handwheel clockwise, the valve stem descends, the valve core and valve seat fit together to achieve a seal, and observe whether the pressure gauge remains at zero.

[0004] The valve stem and valve holder of the aforementioned gate valve are usually connected by threaded engagement. When the valve is closed, if improper force is applied during operation, the threads may be over-tightened, causing stress concentration in the local thread profile of the valve stem and valve holder. After repeated operation over a long period of time, the load it bears exceeds its structural bearing limit, which in turn causes the thread profile to be squeezed and deformed or the tooth surface to crack, or even the thread to strip, affecting the normal opening and closing of the valve. Utility Model Content

[0005] In view of the above-mentioned problems existing in the prior art, one objective of this utility model is to provide a valve anti-slip wire structure to solve the above-mentioned shortcomings of the prior art.

[0006] To achieve the above objectives, this utility model provides a valve anti-slip wire structure, including a valve stem and a valve frame, and further including: a base disposed on the valve frame; a limiting ring adapted to the base is rotatably disposed on the valve stem; at least three limiting clamps, each of which is evenly distributed along the circumference of the limiting ring and extends outward along the radial direction of the limiting ring; the base has a second through hole on its circumference that engages with each of the limiting clamps; when the valve stem descends, the limiting ring contacts the base and forms an axial limit, and by rotating the limiting ring, each of the limiting clamps engages with each of the second through holes.

[0007] Preferably, the limiting ring is an inverted trapezoidal structure, and a groove is provided on the radial side of the limiting ring to slide and cooperate with each of the limiting clamps.

[0008] Preferably, each of the limiting clamps consists of a lever and a protrusion connected to the lever, and each of the protrusions is specifically a round rod structure.

[0009] Preferably, each of the grooves is provided with a first through hole that matches each of the protrusions.

[0010] Preferably, the base has a wedge-shaped portion that matches the bottom of the limiting ring.

[0011] Preferably, the inner diameter of the base is larger than the diameter of the valve stem.

[0012] Preferably, the valve also includes a shut-off valve body, and the valve holder is disposed on the shut-off valve body.

[0013] Preferably, the valve frame has a threaded portion that is threaded to the valve stem, and one end of the valve stem extends into the body of the shut-off valve.

[0014] Preferably, the shut-off valve body is provided with a water inlet and a water outlet that are connected to each other.

[0015] Preferably, the valve stem is provided with a handwheel, and the handwheel is in the form of a circular ring.

[0016] In the above technical solution, the valve anti-slip thread structure provided by this utility model has the following beneficial effects: When the valve is closed, the valve stem and valve frame are threaded together to achieve axial descent. During the axial movement of the valve stem, when the limiting ring contacts the base, it forms an axial limit on the valve stem, restricting its continued descent. At this time, the valve core and valve seat inside the valve have achieved complete sealing and closure. After the valve stem completes the axial limit, the limiting ring is rotated so that each limiting clamp corresponds to and engages with the second through hole on the base, thereby locking the circumferential position of the limiting ring and improving the axial stability of the valve stem. This device limits the maximum descent stroke of the valve stem through the limiting structure, weakening or even avoiding the problem of excessive thread tightening caused by improper operation when closing the valve. This avoids the risk of the thread profile being subjected to loads exceeding its structural bearing limit after long-term repeated improper operation, which could lead to thread profile extrusion deformation, tooth surface cracking, or thread stripping. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a partially enlarged structural diagram of the limiting ring after implementation of this utility model;

[0020] Figure 3 This is a partially enlarged structural diagram of the limiting ring of this utility model during implementation;

[0021] Figure 4 This is a partially enlarged exploded structural diagram of the valve stem and valve frame of this utility model;

[0022] Figure 5 This is an exploded view of the limiting ring and base of this utility model;

[0023] Figure 6 This is a partially enlarged exploded structural diagram of the valve stem and threaded portion of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Gate valve body; 2. Handwheel; 3. Base; 1.1. Inlet; 1.2. Outlet; 1.3. Valve frame; 1.4. Threaded part; 2.1. Valve stem; 2.2. Limiting ring; 2.3. Limiting clamp; 2.4. Protrusion; 2.5. First through hole; 3.1. Second through hole; 3.2. Wedge-shaped part. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Please see Figure 1-6 This utility model provides a technical solution, including the following embodiments:

[0028] Example 1

[0029] Combination Figure 2 , Figure 3 as well as Figure 6 As shown, the device includes a valve stem 2.1 and a valve frame 1.3, and also includes: a base 3, which is mounted on the valve frame 1.3; a limiting ring 2.2 adapted to the base 3 is rotatably mounted on the valve stem 2.1; at least three limiting clamps 2.3, each limiting clamp 2.3 is evenly distributed along the circumference of the limiting ring 2.2 and extends outward along the radial direction of the limiting ring 2.2; the base 3 has a second through hole 3.1 on its circumference that engages with each limiting clamp 2.3; when the valve stem 2.1 descends, the limiting ring 2.2 contacts the base 3 and forms an axial limit, and by rotating the limiting ring 2.2, each limiting clamp 2.3 engages with each second through hole 3.1.

[0030] When the valve is closed, the valve stem 2.1 and the valve holder 1.3 are threadedly engaged to achieve axial descent. During the axial movement of the valve stem 2.1, when the limiting ring 2.2 contacts the base 3, it forms an axial limit on the valve stem 2.1, restricting its further descent. At this time, the valve core and valve seat inside the valve have achieved complete sealing and closure. After the valve stem 2.1 completes the axial limit, the limiting ring 2.2 is rotated so that each limiting clamp 2.3 corresponds to and engages with the second through hole 3.1 on the base 3, thereby locking the circumferential position of the limiting ring 2.2 and improving the axial stability of the valve stem 2.1. This device limits the maximum descent stroke of the valve stem 2.1 through the limiting structure, weakening or even avoiding the problem of excessive thread tightening caused by improper operation when closing the valve. This avoids the risk of thread profile extrusion deformation, tooth surface cracking, or thread stripping caused by long-term repeated improper operation where the load on the thread profile exceeds its structural bearing limit.

[0031] In this embodiment, after the limiting ring 2.2 is engaged with the base 3, the circumferential limitation of the limiting ring 2.2 indirectly improves the stability of the valve stem 2.1 after threaded transmission. The valve stem 2.1 achieves a combined axial movement and circumferential rotation through threaded transmission. When the valve stem 2.1 descends to the point where the limiting ring 2.2 contacts the base 3, axial limitation is first formed (restricting the valve stem from further axial movement). At this time, the limiting clamp 2.3 engages with the second through hole 3.1 to fix the limiting ring 2.2 circumferentially, that is, to limit the limiting ring 2.2 axially, thereby preventing the valve stem 2.1 from moving axially, thus improving the structural stability of the valve stem 2.1 after threaded transmission.

[0032] Example 2

[0033] Combination Figure 3 and Figure 5As shown, this embodiment further describes the limiting ring 2.2 provided in Embodiment 1. Optionally, the limiting ring 2.2 has a rectangular structure and an inverted trapezoidal structure. Preferably, the limiting ring 2.2 is specifically an inverted trapezoidal structure. The limiting ring 2.2 has a sliding groove on its radial side that slides with each limiting clamp 2.3. Each limiting clamp 2.3 consists of a lever and a protrusion 2.4 connected to the lever. Each protrusion 2.4 is specifically a round rod structure. Each sliding groove has a first through hole 2.5 that matches each protrusion 2.4. Further, the inverted trapezoidal limiting ring 2.2 matches the wedge-shaped part 3.2 of the base 3, under the valve stem 2.1. During descent, the guide limiting ring 2.2 precisely fits against the base 3. Its inverted trapezoidal side is a wedge-shaped surface, forming a surface contact with the base 3. This disperses the axial impact force of the valve stem 2.1 during descent, weakening or even preventing local stress concentration in the limiting ring 2.2 or the base 3, thus extending the structural service life. A groove is radially opened along the limiting ring 2.2, restricting the radial sliding of the limiting clamp 2.3. This ensures that after the limiting ring 2.2 is rotated and adjusted, the protrusion 2.4 can align with the first through hole 2.5 and the second through hole 3.1 of the base, and engage in a snap-fit ​​mechanism. Figure 2 As shown in the diagram, the lever acts as the force-bearing end of the limiting clamp 2.3, increasing the contact area for hand operation. This facilitates the user's rotation of the limiting ring 2.2, simultaneously causing the limiting clamp 2.3 to slide and align with the second through hole 3.1. The first through hole 2.5 communicates with the slide groove, and its diameter matches the cylindrical protrusion 2.4, ensuring that the protrusion 2.4 and the second through hole 3.1 are completely fitted together without any wobbling during engagement. Before engaging the limiting clamp 2.3, each limiting clamp 2.3 is moved inward to retract to the end of its stroke (the protrusion 2.4 is located inside the slide groove, not reaching the outside of the limiting ring 2.2). Figure 3 As shown in the diagram, after the limiting ring 2.2 contacts the base 3, the limiting ring 2.2 is rotated to adjust the limiting clamp 2.3 to correspond with and engage with each of the second through holes 3.1.

[0034] Example 3

[0035] Combination Figure 3 and Figure 6 As shown, this embodiment is an optimization based on the base 3 provided in Embodiment 2. The base 3 has a wedge-shaped portion 3.2 that matches the bottom of the limiting ring 2.2. The inner diameter of the base 3 is larger than the diameter of the valve stem 2.1. Furthermore, the inclined surface of the wedge-shaped portion 3.2 complements the inverted trapezoidal structure at the bottom of the limiting ring 2.2. When the valve stem 2.1 descends, the bottom of the limiting ring 2.2 aligns with the inclined surface of the wedge-shaped portion 3.2. The fact that the inner diameter of the base 3 is larger than the diameter of the valve stem 2.1 facilitates its passage through the base 3. Figure 6 As shown in the diagram, the valve stem 2.1 passes through the base 3 and is threadedly connected to the threaded portion 1.4 on the valve holder 1.3.

[0036] Example 4

[0037] Combination Figure 3 As shown, this embodiment further describes the structure and installation of the valve stem 2.1 provided in Embodiment 1. It also includes a stop valve body 1, with a valve bracket 1.3 mounted on the stop valve body 1. The valve bracket 1.3 has a threaded portion 1.4 that is threadedly connected to the valve stem 2.1, and one end of the valve stem 2.1 extends into the stop valve body 1. The stop valve body 1 has a connected inlet portion 1.1 and an outlet portion 1.2. Furthermore, the stop valve body 1, as the core load-bearing component, is based on existing technology. It integrates the valve bracket 1.3, the inlet portion 1.1, and the outlet portion 1.2 into a unified installation standard. The valve bracket 1.3 is fixed to the stop valve body 1, providing rigid support for the threaded portion 1.4. The threaded portion 1.4 engages with the threaded portion 1.4 of the valve stem 2.1, achieving a precise conversion from circumferential rotation to axial movement. The threaded portion 1.4 of the valve stem 2.1... The thread pitch can precisely match the stroke of the valve core when it is fully closed. That is, when the valve stem 2.1 is axially limited by the limiting ring 2.2, the valve core (and valve seat) in the gate valve body 1 are simultaneously fully sealed, avoiding the problem of the thread not being tightened properly or being over-tightened. This can be determined by those skilled in the art through logical analysis and reasoning or limited experiments. One end of the valve stem 2.1 extends into the gate valve body 1 and is used to connect the valve core (not shown in the figure). That is, when the valve stem 2.1 descends to the point where the limiting ring 2.2 is in contact with the base 3, the valve core at the extended end of the valve stem 2.1 is exactly fully sealed with the valve seat, thereby achieving the synchronous achievement of axial limiting and sealing closure, avoiding the risk of thread stripping caused by over-tightening of the valve stem 2.1 after the valve core and valve seat are sealed.

[0038] Example 5

[0039] Combination Figure 1 As shown, a handwheel 2 is provided on the valve stem 2.1. Optionally, the handwheel 2 can be a straight rod structure or a ring structure. Preferably, the handwheel 2 is a ring structure. The handwheel 2 is connected to the valve stem 2.1. The force points of the ring structure handwheel 2 are evenly distributed along the circumference, ensuring that the valve stem 2.1 can be raised and lowered smoothly along the axial direction without tilting or eccentricity. Compared with the straight rod structure (single force point, easy to generate radial load), it can reduce the stress concentration on one side of the thread profile of the thread 1.4, extend the service life of the thread, and indirectly enhance the anti-slip effect. In addition, the ring structure has a larger gripping area and no protruding sharp parts. Users can hold it with both hands or apply force at any angle. The center of gravity is stable when rotating, avoiding accidental collisions caused by hand slippage. At the same time, the ring grip can distribute hand pressure, reduce fatigue after long-term operation, and improve the user experience. Furthermore, the overall rigidity of the ring structure is better than that of the straight rod structure. It is not easy to deform or wobble when rotating. The force distribution of the ring structure is more reasonable and can withstand greater torque.

[0040] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A valve anti-slip wire structure, comprising a valve stem (2.1) and a valve holder (1.3), characterized in that, Also includes: A base (3) is disposed on the valve frame (1.3); A limiting ring (2.2) adapted to the base (3) is rotatably provided on the valve stem (2.1); There are at least three limiting clips (2.3), each of which is evenly distributed around the circumference of the limiting ring (2.2) and extends outward along the radial direction of the limiting ring (2.2); The base (3) has a second through hole (3.1) on its circumference that engages with each of the limiting clips (2.3); When the valve stem (2.1) descends, the limiting ring (2.2) contacts the base (3) and forms an axial limit. By rotating the limiting ring (2.2), each limiting clamp (2.3) engages with each of the second through holes (3.1).

2. The valve anti-slip wire structure according to claim 1, characterized in that, The limiting ring (2.2) is specifically an inverted trapezoidal structure, and the limiting ring (2.2) has a sliding groove on its radial side that slides in cooperation with each of the limiting clamps (2.3).

3. The valve anti-slip wire structure according to claim 2, characterized in that, Each of the limiting clamps (2.3) consists of a lever and a protrusion (2.4) connected to the lever, and each of the protrusions (2.4) is specifically a round rod structure.

4. The valve anti-slip wire structure according to claim 3, characterized in that, Each of the grooves is provided with a first through hole (2.5) that is adapted to each of the protrusions (2.4).

5. The valve anti-slip wire structure according to claim 1, characterized in that, The base (3) has a wedge-shaped part (3.2) that is adapted to the bottom of the limiting ring (2.2).

6. The valve anti-slip wire structure according to claim 5, characterized in that, The inner diameter of the base (3) is larger than the diameter of the valve stem (2.1).

7. The valve anti-slip wire structure according to claim 1, characterized in that, It also includes a shut-off valve body (1), and the valve holder (1.3) is disposed on the shut-off valve body (1).

8. The valve anti-slip wire structure according to claim 7, characterized in that, The valve frame (1.3) has a threaded portion (1.4) that is threaded to the valve stem (2.1), and one end of the valve stem (2.1) extends into the shut-off valve body (1).

9. The valve anti-slip wire structure according to claim 8, characterized in that, The shut-off valve body (1) is provided with a water inlet (1.1) and a water outlet (1.2) that are connected to each other.

10. The valve anti-slip wire structure according to claim 1, characterized in that, A handwheel (2) is provided on the valve stem (2.1), and the handwheel (2) is in the shape of a ring.

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