CN221054372U - Self-closing valve - Google Patents

Abstract

The utility model discloses a self-closing valve, which comprises a valve body, wherein a limiting ring table is arranged in the valve body, a valve rod is movably arranged in the limiting ring table, the outer diameter of the valve rod is smaller than the inner diameter of the limiting ring table, the lower end of the valve rod is closed, a central slot hole is arranged in the valve rod, the upper end of the valve rod is provided with an opening communicated with the central slot hole, the outer wall of the upper part of the valve rod is provided with an air inlet communicated with the central slot hole, the outer wall of the lower part of the valve rod is provided with a positioning convex ring, a sealing ring is sleeved on the outer wall of the valve rod between the upper end surface of the positioning convex ring and the lower end surface of the limiting ring table, an adjusting nut is connected in the lower part of the valve body in an internal rotating way, and a jacking spring is arranged between the adjusting nut and the positioning convex ring. The utility model aims to overcome the defects in the prior art, and provides the automatic closing device which has a simple structure, does not need a manual switch and can be automatically closed when being separated from a pressure gauge; and the self-closing valve can be automatically opened when being screwed with the pressure gauge.

Description

Self-closing valve

Technical Field

The utility model relates to the technical field of valves, in particular to a self-closing valve.

Background

The valve is a control component in the fluid conveying system, has the functions of stopping, adjusting, guiding, preventing backflow, stabilizing pressure, splitting flow or overflow pressure relief and the like, and generally needs to select a valve which is suitable for the conveying requirement of the fluid system.

The existing self-closing valve on the market is generally a one-way valve, and can be opened when the pressure reaches a rated value, and can not be opened if the pressure is insufficient or the direction is not opposite.

When the pressure gauge is installed on the air pipeline of the pressure vessel, the general flow is to install a ball valve, the pressure gauge is installed at the rear part of the ball valve, if the ball valve is forgotten to be opened, the pressure gauge cannot work normally, or the pressure gauge is closed when the pressure gauge is forgotten to be disassembled, and a certain danger exists. Moreover, a large space is reserved for installing the ball valve, when the space in the valve box is limited, the ball valve is often inconvenient to open and close in many times

Therefore, the existing valve for being matched with the pressure gauge needs to be further improved.

Disclosure of utility model

The utility model aims to overcome the defects in the prior art, and provides the automatic closing device which has a simple structure, does not need a manual switch and can be automatically closed when being separated from a pressure gauge; and the self-closing valve can be automatically opened when being screwed with the pressure gauge.

In order to achieve the above purpose, the present utility model adopts the following scheme: a self-closing valve, characterized in that: the valve comprises a valve body, wherein a limiting ring table is arranged in the valve body, a valve rod is movably arranged in the limiting ring table, the outer diameter of the valve rod is smaller than the inner diameter of the limiting ring table, the lower end of the valve rod is closed, a central slot hole is formed in the valve rod, an opening communicated with the central slot hole is formed in the upper end of the valve rod, an air inlet hole communicated with the central slot hole is formed in the outer wall of the upper portion of the valve rod, a positioning convex ring is arranged on the outer wall of the lower portion of the valve rod, a sealing ring is sleeved on the outer wall of the valve rod between the upper end face of the positioning convex ring and the lower end face of the limiting ring table, an adjusting nut is connected in the lower portion of the valve body in an internal rotation mode, and a jacking spring is arranged between the adjusting nut and the positioning convex ring.

As another improvement of the self-closing valve, a connecting inner screw tooth is arranged in the valve body at the upper side of the limiting ring table.

As another improvement of the self-closing valve, the outer wall of the lower part of the valve body is provided with a connecting outer screw tooth.

As another improvement of the self-closing valve of the present utility model, a sealing conical surface is provided in the opening.

As another improvement of the self-closing valve, a circular groove is arranged on the valve rod, and the sealing ring is arranged in the circular groove.

As another improvement of the self-closing valve, an inner connecting screw tooth is arranged in the lower part of the valve body, and an outer connecting screw tooth is arranged on the outer wall of the adjusting nut.

As another improvement of the self-closing valve, an inner hexagonal groove is arranged in the lower end of the adjusting nut.

In summary, compared with the prior art, the utility model has the following beneficial effects: 1. the utility model has compact structure, does not need to reserve large installation space and does not need to separately reserve space. 2. The utility model has strong universality, the specification of the connecting screw is universal, and the adapter is not required to be added when the pipeline is installed. 3. The utility model has stable structure, the inside is mainly mechanical structure, the structure is simple and reliable, and the stability is strong. 4. The utility model does not need a manual switch, and can be automatically closed when being separated from the pressure gauge; can be automatically opened when screwed with the pressure gauge.

Drawings

Fig. 1 is a schematic perspective view of the present utility model.

FIG. 2 is a schematic cross-sectional view of the present utility model.

Fig. 3 is a schematic perspective view of a valve stem of the present utility model.

Fig. 4 is a reference diagram of the usage state of the present utility model.

In the figure: 1. a valve body; 2. a limiting ring table; 3. a valve stem; 4. a central slot; 5. an opening; 51. a first buckle; 52. a second buckle; 6. an air inlet hole; 61. a mounting hole; 7. positioning the convex ring; 8. a seal ring; 9. an adjusting nut; 10. a pressing spring; 11. connecting the inner screw teeth; 12. connecting the outer screw teeth; 13. sealing the conical surface; 14. a circular groove; 15. the inner connecting screw thread; 16. the outer part is connected with a screw thread; 17. an inner hexagonal groove.

Detailed Description

The above and further technical features and advantages of the present utility model are described in more detail below with reference to the accompanying drawings.

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.

It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

Referring to fig. 1-4, the self-closing valve of the utility model comprises a valve body 1, wherein a limiting ring table 2 is arranged in the valve body 1, a valve rod 3 is movably arranged in the limiting ring table 2, the outer diameter of the valve rod 3 is smaller than the inner diameter of the limiting ring table 2, the lower end of the valve rod 3 is closed, a central slot hole 4 is arranged in the valve rod 3, an opening 5 communicated with the central slot hole 4 is arranged at the upper end of the valve rod 3, an air inlet hole 6 communicated with the central slot hole 4 is arranged on the outer wall of the upper part of the valve rod 3, a positioning convex ring 7 is arranged on the outer wall of the lower part of the valve rod 3, a sealing ring 8 is sleeved on the outer wall of the valve rod 3 between the upper end surface of the positioning convex ring 7 and the lower end surface of the limiting ring table 2, an adjusting nut 9 is connected in the lower part of the valve body 1, and a pressing spring 10 is arranged between the adjusting nut 9 and the positioning convex ring 7. In the utility model, the lower end of the jacking spring 10 is jacked on the adjusting nut 9, and the upper end of the jacking spring 10 is jacked on the lower end surface of the positioning convex ring 7, so as to drive the valve rod 3 to be jacked upwards; the sealing ring 8 arranged on the positioning convex ring 7 and the lower end surface of the limiting ring table 2 are mutually sealed. Referring to fig. 4, when the self-closing valve 100 is used in cooperation with a pressure gauge, the self-closing valve 100 is connected with the three-way joint 20 of the pipeline 10, the pressure gauge 30 is connected with the self-closing valve, when the pressure gauge 30 is twisted into the self-closing valve, the center of the valve rod 3 of the self-closing valve is propped against the valve rod 3 of the self-closing valve, the valve rod 3 is forced to move downwards under the action of external force, the sealing ring 8 and the limiting ring table 2 are separated from each other, and because a ventilation gap exists between the positioning convex ring 7 and the inner wall of the valve body 1, in addition, the external diameter of the valve rod 3 is smaller than the internal diameter of the limiting ring table 2, gas of the 10 enters the self-closing valve along the three-way joint 20, and then enters the pressure gauge 30 through a channel opened by the self-closing valve, so that the pressure gauge 30 displays correct numbers, and the self-closing valve is not required to ventilate. When the pressure gauge is disassembled, the unscrewed pressure gauge moves upwards, and the valve rod 3 of the self-closing valve is reset under the action of the jacking spring 10; the passage is closed to prevent the gas in the pipe from flowing into the atmosphere.

In the utility model, a connecting inner screw thread 11 is arranged in a valve body 1 at the upper side of a limiting ring table 2. The connection with the pressure gauge 30 can be facilitated by connecting the inner screw 11. The outer wall of the lower part of the valve body 1 is provided with a connecting outer screw thread 12. Can be conveniently connected with the three-way joint 20.

The utility model is provided with a sealing conical surface 13 in the opening 5. The connection between the pressure gauge 30 and the valve rod 3 can be made more tight by the sealing cone 13.

In the utility model, a circular groove 14 is arranged on the valve rod 3, and the sealing ring 8 is arranged in the circular groove 14. The sealing ring 8 can synchronously move along with the valve rod 3 through the circular groove 14, so that the sealing ring 8 is effectively prevented from being adhered to the lower end surface of the limiting ring table 2.

In the utility model, an inner connecting screw tooth 15 is arranged in the lower part of the valve body 1, and an outer connecting screw tooth 16 is arranged on the outer wall of the adjusting nut 9. An inner hexagonal groove 17 is arranged in the lower end of the adjusting nut 9. According to the utility model, the pressure of the jacking spring 10 can be regulated through the regulating nut 9, so that the sealing performance between the sealing ring 8 and the limiting ring table 2 is ensured.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (7)

1. A self-closing valve, characterized in that: including valve body (1) be equipped with spacing ring platform (2) in valve body (1) spacing ring platform (2) internalization is provided with valve rod (3), the external diameter of valve rod (3) is less than the internal diameter of spacing ring platform (2), valve rod (3) lower extreme is sealed be equipped with central slotted hole (4) in valve rod (3), valve rod (3) upper end is equipped with opening (5) that are linked together with central slotted hole (4) valve rod (3) upper portion outer wall is equipped with inlet port (6) that are linked together with central slotted hole (4) valve rod (3) lower part outer wall is equipped with location bulge loop (7) valve rod (3) outer wall cover between location bulge loop (7) up end and spacing ring platform (2) lower extreme face is equipped with sealing washer (8) valve body (1) lower part internal rotation has connect adjusting nut (9) be equipped with between adjusting nut (9) and location bulge loop (7) top pressure spring (10).

2. The self-closing valve according to claim 1, characterized in that a connecting inner screw thread (11) is arranged in the valve body (1) at the upper side of the limiting ring table (2).

3. A self-closing valve according to claim 1, characterized in that the outer wall of the lower part of the valve body (1) is provided with connecting outer threads (12).

4. A self-closing valve according to claim 1, characterized in that a sealing cone (13) is provided in the opening (5).

5. A self-closing valve according to claim 1, characterized in that a circular groove (14) is provided on the valve stem (3), the sealing ring (8) being arranged in the circular groove (14).

6. A self-closing valve according to claim 1, characterized in that an inner connecting screw (15) is provided in the lower part of the valve body (1), and an outer connecting screw (16) is provided on the outer wall of the adjusting nut (9).

7. A self-closing valve according to claim 1, characterized in that an internal hexagonal groove (17) is provided in the lower end of the adjusting nut (9).