CN223708657U - A pipeline check valve to improve sealing performance - Google Patents

Abstract

This utility model discloses a pipeline check valve with improved sealing performance, belonging to the technical field of check valves. It includes a valve body and a valve core. The valve body has an opening adapted to be blocked by the valve core. The plane containing the opening forms an acute angle with the vertical plane, and the opening faces upwards. The upper end of the valve core is rotatably connected to the inner wall of the valve body. A spring acting on the side of the valve core facing away from the opening is provided within the valve body. After the valve core is fitted with the opening, it still tends to deflect downwards under its own weight, pressing the valve core firmly against the opening, thus ensuring a tight seal. Compared to designs with a vertically positioned opening, this utility model offers better and more stable sealing performance, resulting in a better backflow prevention effect.

Description

Pipeline check valve capable of improving tightness

Technical Field

The utility model mainly relates to the technical field of check valves, in particular to a pipeline check valve for improving tightness.

Background

A check valve is a valve for controlling the one-way flow of fluid in a pipe, for preventing the backflow of fluid, for protecting the safety operation of equipment and piping, and for maintaining the flow control of fluid, and is automatically opened when the flow direction of fluid is consistent with the design requirements of the check valve, allowing the fluid to pass through, and is automatically closed when the flow direction of fluid is opposite to the design requirements, preventing the fluid from flowing.

At present, in the pipeline check valve structure that the leakproofness is good of publication No. CN219159619U, through the gravity self-closing characteristic of case mechanism to and the supplementary closure characteristic of elasticity canceling release mechanical system, it can improve the closure sealing performance of case on the one hand, avoids the valve to appear the condition of gap in the self-closing in-process, and on the other hand has good dual supplementary closure performance, can ensure the stability of case closure check, improves the life of check valve. However, the through hole of the valve body inner cavity and the valve core, which are matched to play a role in closing, is positioned on the vertical surface, and when the valve core rotates to a vertical state, the self gravity of the valve core mechanism almost does not play a role in promoting the closing sealing any more, so that the closing sealing performance of the valve core to the through hole is still to be improved.

Disclosure of utility model

The technical scheme of the utility model aims at the technical problem that the prior art is too single, provides a solution which is obviously different from the prior art, and mainly provides the pipeline check valve for improving the tightness, so as to solve the technical problem that the sealing performance of the valve core on the through hole is still to be improved in the prior art.

The technical scheme adopted for solving the technical problems is as follows:

The pipeline check valve comprises a valve body and a valve core, wherein a through hole which is suitable for the valve core to be plugged is formed in an inner cavity of the valve body, an acute angle relation is formed between a plane where the through hole is located and a vertical plane, the through hole is arranged upwards, the upper end of the valve core is rotationally connected with the inner wall of the valve body, and a spring which acts on one side of the valve core opposite to the through hole is arranged in the valve body.

Further, an upper protruding piece is arranged at the lower part of the valve body inner cavity corresponding to the through hole, and the upper protruding piece is of a inverted V-shaped structure.

Further, the upward protruding piece comprises an upward inclined edge and a downward inclined edge, the upper end of the upward protruding piece forms a joint edge for joint with the valve core, one end of the joint edge is connected with the upper end of the upward inclined edge, and the other end of the joint edge is connected with the downward inclined edge through a vertical edge.

Further, an elastic block is arranged at one side of the lower end of the valve core, which is away from the through hole.

Further, the upper end of the valve core is rotationally connected with the inner wall of the valve body through a hinge shaft.

Further, a fixing piece with a containing cavity is arranged in the valve body, and the spring is arranged in the containing cavity of the fixing piece.

Further, the spring is a torsion spring, a connecting shaft is arranged in the fixing piece, the spring is arranged on the connecting shaft, and one end of the spring is abutted against or connected to one side of the valve core, which is opposite to the through hole.

Further, two ends of the valve body are respectively provided with a water inlet end connecting piece and a water outlet end connecting piece.

Further, the water inlet end connecting piece and the water outlet end connecting piece are both connecting flanges or are both internal thread connecting pipes.

Further, at least one through hole is formed in the valve body, and the valve cores and the through holes are arranged in one-to-one correspondence.

Compared with the prior art, the utility model has the beneficial effects that:

(1) Based on the fact that the plane where the through hole is located and the vertical plane are in an acute angle relation, the through hole is arranged upwards, after the valve core is attached to the through hole, the valve core still has a downward deflection trend under the self gravity, and the valve core is pressed at the through hole, so that the closing sealing effect of the through hole of the valve core pair can be guaranteed. Compared with the scheme that the through hole is vertically arranged, the utility model has better and more stable closing sealing performance, thereby being capable of playing better backflow preventing effect.

(2) The spring acts on one side of the valve core, which is opposite to the through hole, and can further push the valve core to close the through hole, so that the backflow prevention function is realized. Meanwhile, the spring can provide buffering and damping effects, and when fluid flows reversely, the spring can absorb impact force and pressure fluctuation of the fluid, so that damage to the valve body and the valve core caused by the impact force and the pressure fluctuation is reduced.

(3) In the optimization scheme of the utility model, the upper protruding part is arranged at the lower part of the valve body inner cavity corresponding to the position of the through hole, and the structure of the upper protruding part is used for optimizing design, so that on one hand, the formation of the upward through hole 11 is promoted, and on the other hand, a higher obstruction member can be provided, the backflow of bottom fluid is better prevented, and the backflow preventing function is further enhanced.

The utility model will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the internal structure of a valve body in a second embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of the structure of the area A in FIG. 1;

Fig. 3 is a schematic perspective view of a front view in a second embodiment of the present utility model;

Fig. 4 is a schematic perspective view of a third embodiment of the present utility model.

The valve comprises a valve body, a valve core, a through hole, a protruding part, a lifting bevel edge, a fitting edge, a vertical edge, a sinking bevel edge, a connecting shaft, a hinge shaft, a valve core, a 41 elastic block, a 5, a spring, a 6, a fixing part, a 7, a water inlet end connecting part and a 8, water outlet end connecting part, wherein the reference numeral is 1.

Detailed Description

In order that the utility model may be more fully understood, a more particular description of the utility model will be rendered by reference to the appended drawings, in which several embodiments of the utility model are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the utility model.

It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to the other element, it may be directly connected to the other element or intervening elements may also be present, the terms "vertical", "horizontal", "left", "right" and the like are used herein for the purpose of illustration only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly connected to one of ordinary skill in the art to which this utility model belongs, and the knowledge of terms used in the description of this utility model herein for the purpose of describing particular embodiments is not intended to limit the utility model, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-3, a pipe check valve for improving sealing performance includes:

The valve body 1 is internally provided with a transverse channel, a through hole 11 which is adapted to the plugging of the valve core 4 is arranged in an inner cavity of the valve body, an acute angle relation is formed between a plane where the through hole 11 is positioned and a vertical plane, and the through hole 11 is arranged upwards;

The connecting shaft 2 is arranged in a fixing piece 6 at the top of the valve body 1 and is used for installing a spring 5;

the hinge shaft 3 is arranged at the upper end of the valve core 4 and is connected with the inner wall of the valve body 1 through a bearing;

The valve core 4 is a water baffle, the upper end of the valve core is rotationally connected with the inner wall of the valve body 1 through the hinge shaft 3, and the valve core can seal the through hole 11 under the action of self gravity;

the spring 5 is arranged in the fixing piece 6 at the top of the valve body 1, the spring 5 adopts a torsion spring, the spring 5 is arranged on the connecting shaft 2, and one end of the spring 5 is abutted against or connected with one side of the valve core 4, which is opposite to the through hole 11;

The fixing piece 6 is internally provided with a containing cavity, and the fixing piece 6 is internally provided with a connecting shaft 2 for installing the spring 5. The fixing piece 6 is connected with the device main body 1 through bolts, the stability of the structure can be enhanced through the fixing piece 6, and the object is ensured not to move or loosen accidentally under normal use or external force;

A water inlet end connecting piece 7 connected to the water inlet end of the valve body 1;

the water outlet end connecting piece 8 is connected with the water outlet end of the valve body 1.

In this embodiment, please refer to fig. 2, which is suitable for small-caliber pipes, the water inlet end connecting piece 7 and the water outlet end connecting piece 8 are both connecting pipes with internal threads, and the outer profile is of a hexagonal structure (or other polygonal structures) so as to facilitate rotational connection.

In this embodiment, please refer to fig. 1, two through openings 11 are provided in the valve body 1, and two valve cores 4 and related structures are correspondingly provided. The two backflow prevention mechanisms are arranged in the way, and when one backflow prevention mechanism is damaged, the other backflow prevention mechanism can still play a backflow prevention function, so that the action and effect of the check valve are guaranteed.

The second embodiment is different from the first embodiment in that:

In this embodiment, please refer to fig. 2, the protruding member 12 includes a raised bevel 121 and a sunk bevel 124, and an attaching edge 122 for attaching the valve core 4 is formed at the upper end of the protruding member 12, one end of the attaching edge 122 is connected to the upper end of the raised bevel 121, and the other end of the attaching edge 122 is connected to the sunk bevel 124 through a vertical edge 123. Better interception can be achieved by the vertical edge 123 and the sinking bevel edge 124 compared to the separate bevel edge structure, so as to better ensure the backflow prevention effect on the bottom fluid.

In this embodiment, please refer to fig. 1, an elastic block 41 is disposed at a side of the lower end of the valve core 4 facing away from the through hole 11, and when the valve core 4 is opened at a larger angle and touches the top wall of the inner cavity of the valve body 1, damage caused by hard collision can be avoided by the elastic block 41.

Other embodiments are the same as the first embodiment.

The third embodiment is different from the second embodiment in that:

In this embodiment, please refer to fig. 4, which is suitable for a large-caliber pipeline, the water inlet end connector 7 and the water outlet end connector 8 are both connecting flanges.

And the other is the same as the second embodiment.

The fourth embodiment is different from the second embodiment in that:

in this embodiment, a through hole 11 is provided in the valve body 1, and a valve core 4 and its related structure are correspondingly provided.

And the other is the same as the second embodiment.

While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the utility model is not limited to the embodiments described above, but is intended to be within the scope of the utility model, as long as such insubstantial modifications are made by the method concepts and technical solutions of the utility model, or the concepts and technical solutions of the utility model are applied directly to other occasions without any modifications.

Claims (10)

1. The pipeline check valve with improved tightness comprises a valve body (1) and a valve core (4), wherein a through hole (11) which is matched with the valve core (4) and is blocked is formed in an inner cavity of the valve body (1), the pipeline check valve is characterized in that the plane where the through hole (11) is located is in an acute angle relation with a vertical plane, the through hole (11) is arranged upwards, the upper end of the valve core (4) is rotationally connected with the inner wall of the valve body (1), and a spring (5) which acts on one side of the valve core (4) opposite to the through hole (11) is arranged in the valve body (1).

2. The pipeline check valve for improving tightness according to claim 1, wherein an upward protruding piece (12) is arranged at the lower part of the inner cavity of the valve body (1) corresponding to the through hole (11), and the upward protruding piece (12) is in a inverted V-shaped structure.

3. A pipe check valve with improved sealing performance according to claim 2, wherein the upward protruding member (12) comprises an upward sloping side (121) and a downward sloping side (124), the upper end of the upward protruding member (12) forms an attaching edge (122) for attaching the valve core (4), one end of the attaching edge (122) is connected to the upper end of the upward sloping side (121), and the other end of the attaching edge (122) is connected with the downward sloping side (124) through a vertical edge (123).

4. The pipeline check valve with improved tightness according to claim 1, wherein an elastic block (41) is arranged at one side of the lower end of the valve core (4) facing away from the through hole (11).

5. The pipeline check valve for improving tightness according to claim 1, wherein the upper end of the valve core (4) is rotationally connected with the inner wall of the valve body (1) through a hinge shaft (3).

6. The pipeline check valve for improving tightness according to claim 1, wherein the valve body (1) is provided with a fixing piece (6) with a cavity inside, and the spring (5) is arranged in the cavity of the fixing piece (6).

7. The pipeline check valve for improving tightness according to claim 6, wherein the spring (5) is a torsion spring, the connecting shaft (2) is arranged in the fixing piece (6), the spring (5) is arranged on the connecting shaft (2), and one end of the spring (5) is abutted against or connected with one side of the valve core (4) opposite to the through hole (11).

8. The pipeline check valve for improving tightness according to claim 1, wherein the two ends of the valve body (1) are respectively provided with a water inlet end connecting piece (7) and a water outlet end connecting piece (8).

9. The pipeline check valve with improved tightness according to claim 8, wherein the water inlet end connecting piece (7) and the water outlet end connecting piece (8) are both connecting flanges or are both internally threaded connecting pipes.

10. The pipeline check valve for improving tightness according to any one of claims 1 to 9, wherein at least one through hole (11) is arranged in the valve body (1), and the valve cores (4) are arranged in one-to-one correspondence with the through holes (11).