A fool-proof valve stem blowout prevention structure

Abstract

The application discloses a fool-proof valve rod blowout prevention structure, which comprises a valve body and a valve rod fixed at one end of the valve body; one end of the valve rod is partially inserted into the valve body, and the valve body is provided with a blowout prevention mechanism on one side; a packing is arranged on the outer side of the valve rod, and one end of the blowout prevention mechanism is inserted into the packing; the blowout prevention mechanism comprises a first safety screw plug and a second safety screw plug which are connected in cooperation, one end of the first safety screw plug is provided with a connecting rod, the outer side of one end of the connecting rod is provided with a protrusion, and a disc spring is arranged between the first safety screw plug and the second safety screw plug; the first safety screw plug is fixed in the valve rod by rotating the blowout prevention mechanism by 90 degrees and clamping through the disc spring, and a stable structure is formed through the cooperation of the second safety screw plug and the first safety screw plug. During use, even if the second safety plug is accidentally screwed out, the first safety screw plug can still effectively protect the valve rod and prevent it from being blown out due to the mechanical limiting of the protrusion at the end of the connecting rod.

Description

Technical Field

[0001] This utility model relates to the field of valve stem fixing technology, specifically to a foolproof valve stem anti-blowout structure. Background Technology

[0002] The existing valve stem anti-blowout structure lacks a two-stage safety plug. When replacing the valve packing, if the safety plug is accidentally unscrewed completely or partially, the internal pressure balance of the ball valve will be disrupted. Under the pressure of the medium, the valve stem may be blown out of the valve body at high speed. Furthermore, the existing anti-blowout structure lacks a protrusion at the end of the safety plug, making it difficult to secure by rotation. Accidental operation of the safety plug can easily cause it to detach from the packing gasket. Utility Model Content

[0003] The purpose of this utility model is to provide a foolproof valve stem anti-blowout structure, including: a valve body and a valve stem fixed to one end of the valve body;

[0004] One end of the valve stem is inserted into the valve body, and an anti-blowout mechanism is provided on one side of the valve body;

[0005] A packing pad is provided on the outside of the valve stem, and one end of the anti-blowout mechanism is inserted into the packing pad.

[0006] The anti-blowout mechanism includes a first safety plug and a second safety plug that are connected in a mating manner. A connecting rod is provided at one end of the first safety plug, and an outer protrusion is provided at one end of the connecting rod. A disc spring is provided on the outer side of the first safety plug.

[0007] In one preferred embodiment, the first safety plug and the second safety plug are connected by a threaded connection.

[0008] In one preferred embodiment, there are two protrusions, which are symmetrically arranged on the outer side of one end of the connecting rod.

[0009] In one preferred embodiment, a through hole is provided on one side of the connecting rod, and two grooves matching the protrusion are provided on the inner wall of the through hole.

[0010] In a preferred embodiment, a pressure sleeve and a packing are further provided on the outer side of the connecting rod, with the packing disposed between the pressure sleeve and the packing pad.

[0011] In a preferred embodiment, one end of the pressure sleeve abuts against the end of the valve body, and the other end of the pressure sleeve is provided with a pressure plate, which is sleeved on the outside of the valve stem.

[0012] In one preferred embodiment, bolts are provided at each of the four corners of the pressure plate, and one end of each bolt is fixedly installed at one end of the valve body.

[0013] Due to the application of the above technical solution, the beneficial effects of this application compared with the prior art are as follows:

[0014] This application discloses a foolproof valve stem anti-blowout structure. A disc spring clamps the valve stem, and by rotating the anti-blowout mechanism 90 degrees, a first safety plug is fixed inside the valve stem. A second safety plug cooperates with the first safety plug to form a stable structure. During use, even if the second safety plug is accidentally unscrewed, the first safety plug effectively protects the valve stem and prevents it from being blown out due to the mechanical restraint provided by the protrusion at the end of the connecting rod. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below.

[0016] Obviously, the accompanying drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram showing the connection between the valve body and the anti-blowout mechanism of this utility model;

[0018] Figure 2 This is a schematic diagram showing the connection between the valve stem and the anti-blowout mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the anti-blowout structure of this utility model.

[0020] In the diagram: 1. Valve body, 2. Pressure sleeve, 3. Valve stem, 4. Pressure plate, 5. Bolt, 6. Anti-blowout mechanism, 601. First safety plug, 602. Disc spring, 603. Second safety plug, 604. Connecting rod, 605. Protrusion, 606. Sealing gasket; 7. Packing, 8. Packing pad. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0023] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the present invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0024] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0025] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] Figures 1-3 The present invention provides a foolproof valve stem anti-blowout structure, comprising: a valve body 1 and a valve stem fixed to one end of the valve body 1;

[0029] One end of the valve stem is inserted into the valve body 1, and an anti-blowout mechanism 6 is provided on one side of the valve body 1;

[0030] A packing pad is installed on the outside of the valve stem, and one end of the anti-blowout mechanism is inserted into the packing pad;

[0031] The anti-blowout mechanism 6 includes a first safety plug 601 and a second safety plug 603 that are connected in a mating manner. A connecting rod 604 is provided at one end of the first safety plug 601, and an outer protrusion 605 is provided at one end of the connecting rod 604. A disc spring 602 is provided on the outer side of the first safety plug 601 near the end of the second safety plug 603.

[0032] According to an embodiment of the present invention, the first safety plug 601 and the second safety plug 603 are connected by a threaded connection.

[0033] According to the embodiment of this utility model, there are two protrusions 605, which are symmetrically arranged on the outer side of one end of the connecting rod 604. The connecting rod 604 and the first safety plug 601 are integrally formed. In addition, a sealing gasket 606 is sleeved on the outer side of the first safety plug 601, and the sealing is achieved by loading the disc spring on the first safety plug.

[0034] According to an embodiment of the present invention, a through hole is provided on one side of the connecting rod 604, and two grooves matching the protrusion 605 are provided on the inner wall of the through hole.

[0035] It should be noted that the valve body is equipped with a two-stage safety plug structure, forming a dual protection mechanism. The first safety plug 601 adopts a rotation limit design. During operation, rotating it 90° clockwise or counterclockwise will cause the protrusion 605 at the front of the first safety plug 601 to precisely embed into the corresponding groove, achieving mechanical limit fixation and ensuring that the first safety plug will not accidentally loosen under high pressure, thus guaranteeing sealing reliability.

[0036] The second safety plug 603 serves as a backup protection unit. When the first safety plug 601 fails to seal or the preload decreases, the second safety plug 603 can be manually adjusted to apply a tightening force, adding safety redundancy to the sealing system. Through dual-stage pressure compensation, the risk of media leakage is effectively reduced, and the operational safety and stability of the valve body under harsh conditions are significantly improved.

[0037] According to an embodiment of the present invention, a pressure sleeve 2 and a packing 7 are also provided on the outer side of the connecting rod 604, and the packing 7 is disposed between the pressure sleeve 2 and the packing pad 8.

[0038] According to an embodiment of the present invention, one end of the pressure sleeve 2 abuts against the end of the valve body 1, and the other end of the pressure sleeve 2 is provided with a pressure plate 4, which is sleeved on the outside of the valve stem 3.

[0039] According to the embodiment of this utility model, bolts 5 are provided at all four corners of the pressure plate 4, and one end of the bolt 5 is fixedly installed at one end of the valve body 1.

[0040] In summary, the foolproof valve stem anti-blowout structure of this application uses a disc spring 602 for clamping. Rotating the anti-blowout mechanism 6 by 90 degrees fixes the first safety plug 601 inside the valve stem 3. The second safety plug 603 cooperates with the first safety plug 601 to form a stable structure. During packing replacement, even if the second safety plug is accidentally unscrewed, the protrusion 605 at the end of the connecting rod 604 provides a mechanical limit, and the first safety plug 601 can still apply a certain pressure to the packing pad. The first and second safety plugs, through the packing pad, form a reverse constraint on the valve stem. When the pressure of the medium in the pipeline attempts to push the valve stem out, the limiting structure formed by the first and second safety plugs and the packing pad generates sufficient resistance to counteract the thrust of the medium pressure on the valve stem, thereby firmly fixing the valve stem inside the valve body.

[0041] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A foolproof valve stem anti-blowout structure, comprising: A valve body and a valve stem fixed to one end of the valve body; characterized in that, One end of the valve stem is inserted into the valve body, and an anti-blowout mechanism is provided on one side of the valve body; A packing pad is provided on the outside of the valve stem, and one end of the anti-blowout mechanism is inserted into the packing pad. The anti-blowout mechanism includes a first safety plug and a second safety plug that are connected in a mating manner. A connecting rod is provided at one end of the first safety plug, and an outer protrusion is provided at one end of the connecting rod. A disc spring is provided on the outer side of the first safety plug.

2. The foolproof valve stem anti-blowout structure as described in claim 1, characterized in that, The first safety plug and the second safety plug are connected by a threaded connection.

3. The foolproof valve stem anti-blowout structure as described in claim 1, characterized in that, There are two protrusions, which are symmetrically arranged on the outer side of one end of the connecting rod.

4. The foolproof valve stem anti-blowout structure as described in claim 3, characterized in that, A through hole is provided on one side of the connecting rod, and two grooves matching the protrusion are provided on the inner wall of the through hole.

5. The foolproof valve stem anti-blowout structure as described in claim 4, characterized in that, The outer side of the connecting rod is also provided with a pressure sleeve and a packing, and the packing is disposed between the pressure sleeve and the packing pad.

6. The foolproof valve stem anti-blowout structure as described in claim 5, characterized in that, One end of the pressure sleeve abuts against the end of the valve body, and the other end of the pressure sleeve is provided with a pressure plate, which is sleeved on the outside of the valve stem.

7. The foolproof valve stem anti-blowout structure as described in claim 6, characterized in that, Bolts are provided at all four corners of the pressure plate, and one end of each bolt is fixedly installed at one end of the valve body.

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