CN205841880U - A kind of anti-jamming spring loaded check valve - Google Patents

Abstract

An anti-seize spring check valve, including a valve body, a top cover, a check plate, a valve stem and a valve stem sleeve, the valve body is a hollow structure with upper and lower openings, the lower opening of the valve body is a water inlet, and the top of the valve body The sealing cover at the opening is provided with a top cover, which is opened with a water outlet connected to the inside of the valve body, and the center of the lower part of the top cover is fixedly connected with a valve stem sleeve, which is a vertical hollow pipe, and a valve is installed in the valve stem sleeve. Stem, the valve stem is slidingly connected with the valve stem sleeve, the bottom of the valve stem is connected with a check plate, the check plate is located inside the valve body, the check plate is in sealing contact with the inner wall of the valve, and the diameter of the check plate is smaller than that of the upper part of the check plate. The diameter of the valve body, the outer sleeve of the valve stem sleeve is equipped with a spring, one end of the spring is in contact with the upper part of the check plate, and the other end is in contact with the lower part of the top cover, and the top cover has a diversion hole connected with the valve stem sleeve. The utility model can discharge accumulated water or air in the valve stem sleeve smoothly without forming resistance to the valve stem, so that the check valve can be opened and closed more smoothly, and the maintenance cost can be reduced.

Description

An anti-seize spring check valve

technical field

The utility model relates to the field of valves, in particular to an anti-seize spring check valve.

Background technique

Check valve, also known as check valve, one-way valve or check valve, is used to ensure the directional flow of the fluid medium in the pipeline without backflow. There is a matching gap between the valve stem and the valve stem sleeve of the existing spring-type check valve, and water or air is easy to accumulate in the valve stem sleeve, causing the check valve to fail to open. In addition, when the check valve is closed, if there is water or air in the valve stem sleeve, a negative pressure will be formed inside the valve stem sleeve, so that the check valve cannot be closed normally.

Contents of the invention

In order to overcome the above disadvantages, the utility model provides an anti-seize spring check valve, which can discharge the accumulated water or air in the valve stem sleeve smoothly without forming resistance to the valve stem. The check valve opens and closes more smoothly, reducing maintenance costs and maintenance intensity.

The technical scheme that the utility model adopts is as follows:

An anti-seize spring check valve, comprising a valve body, a top cover, a check plate, a valve stem and a valve stem sleeve, the valve body is a hollow structure with upper and lower openings, the lower opening of the valve body is a water inlet, the valve The sealing cover at the top opening of the body is provided with a top cover, which is opened with a water outlet connected to the inside of the valve body. The center of the lower part of the top cover is fixedly connected with a valve stem sleeve. The valve stem sleeve is a vertical hollow pipe, and the valve stem sleeve is installed inside. There is a valve stem, the valve stem is slidingly connected with the valve stem sleeve, the bottom of the valve stem is connected with a check plate, the check plate is located inside the valve body, the check plate is in sealing contact with the inner wall of the valve, and the diameter of the check plate is smaller than that of the check plate The diameter of the valve body in the upper part, the outer part of the valve stem sleeve is covered with a spring, one end of the spring is in contact with the upper part of the non-return plate, and the other end is in contact with the lower part of the top cover, and the top cover is provided with a diversion hole communicating with the valve stem sleeve . The function of the diversion hole is to discharge the water or air in the valve stem sleeve to make the opening and closing of the check valve more smooth.

Preferably, the guide hole is located at the center of the top cover.

Preferably, the diameter of the diversion hole is 8mm. According to the needs in actual work, the diameter of the diversion hole is 8mm, which can well realize the function of the utility model. Of course, the check valve of the diversion hole with other diameters also falls into the protection scope of the utility model.

Preferably, the non-return plate is a circular sheet structure.

Preferably, a rubber pad is sheathed on the outside of the non-return plate. A rubber pad is sheathed on the outside of the circular sheet structure, which can improve the sealing effect of the non-return plate and make the closing effect of the non-return plate better.

Preferably, the distance d between the valve stem and the inner wall of the valve stem sleeve is less than 1mm.

Preferably, there are two water outlets, which are crescent-shaped and symmetrical about the center of the top cover. This setting is not only conducive to the smooth discharge of water flow, but also enables the top cover to be removed from the valve body more smoothly.

Preferably, the top cover is threadedly connected with the valve body. Such arrangement can make the top cover be detached from the valve body smoothly.

Compared with the prior art, the beneficial effects of the utility model are:

Through the guide hole in the center of the top cover connected to the valve stem sleeve, the accumulated water or air in the valve stem sleeve can be quickly discharged, so that the check valve can be opened and closed more smoothly, disassembly is more convenient, and maintenance costs and maintenance intensity are reduced.

Description of drawings

Fig. 1 is the front sectional view of the utility model;

Fig. 2 is a top view of the utility model.

detailed description

Now in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figures 1 and 2, an anti-seize spring check valve includes a top cover 1, a valve body 2 and a check plate 4, the valve body 2 is a hollow structure with upper and lower openings, and the lower part of the valve body 2 is open For the water inlet 8, the lower side wall of the valve body 2 is recessed inward. Both the outer edge of the top surface and the outer edge of the bottom surface of the valve body 2 are provided with screw holes 10 for installing the check valve at a desired position.

There are two water outlets 9 on the top cover 1. The water outlets 9 are crescent-shaped and symmetrical to the center of the top cover 1. The top cover 1 is sealed and connected to the upper opening of the valve body 2. What this embodiment uses is threaded connection. This kind of connection can make the top cover 1 easily disassembled from the valve body 2, which is convenient for cleaning and maintenance.

The lower part of the top cover 1 is fixedly connected with the valve stem sleeve 7, the valve stem 3 is installed in the valve stem sleeve 7, the valve stem 3 is slidingly connected with the valve stem sleeve 7, the lower part of the valve stem 3 is connected with the upper center of the check plate 4, The return plate 4 is located inside the valve body, the check plate 4 is a circular sheet structure, and the outside of the check plate 4 is covered with rubber pads. The check plate 4 is in sealing contact with the inner wall of the valve body. The diameter of the check plate 4 is smaller than the diameter of the valve body located on the upper part of the check plate 4, which is conducive to the smooth opening of the check plate 4. The side wall of the valve body 2 at the lower part of the plate 4 is recessed inward, and the side wall of the valve body 2 at the upper part of the check plate 4 protrudes outward.

A spring 6 is sheathed on the outside of the stem sleeve 7 , one end of the spring 6 contacts the bottom of the top cover 1 , and the other end contacts the top of the non-return plate 4 .

The center of the top cover 1 is provided with a guide hole 5 communicating with the stem sleeve 7 . The diversion hole 5 can quickly discharge the accumulated water or gas in the valve stem sleeve 7, so as to ensure that the valve stem 3 can rise and fall smoothly, and ensure that the check valve will not be stuck during the working process.

In this embodiment, the diversion hole 5 is opened at the center of the top cover 7, the diameter of the diversion hole 5 is 8 mm, and the distance between the valve stem 3 and the inner wall of the valve stem sleeve 7 is d<1 mm.

The specific working process is as follows. Install the check valve at the required position. At this time, the check valve is in a closed state. When water flows in from the water inlet 8, due to the effect of water pressure, the check plate 4 is pushed open, so that the water flow Enter the valve body 2 and flow out from the water outlet 9. When the water flow stops, due to insufficient water pressure, under the action of the spring 6, the non-return plate 4 is closed, thereby preventing the water flow from flowing backward. When liquid or air enters the valve stem sleeve 7, due to the existence of the flow guide hole 5, the liquid or air can be quickly removed to ensure the normal operation of the check valve. When the check valve needs to be repaired or cleaned, just unscrew the top cover 1 from the valve body 2, and then the valve stem 3, check plate 4 and spring 6 can be taken out from the valve body 1, so that the entire check valve valve for repair. At the same time, if some components are damaged, only some components need to be replaced, so the structure is simpler and the use is more convenient.

What is described above is only the embodiment of the utility model, and common knowledge such as the specific structure and characteristic known in the scheme is not described too much here. It should be pointed out that for those skilled in the art, under the premise of not departing from the structure of the utility model, some deformations and improvements can also be made, and these should also be regarded as the protection scope of the utility model, and these will not affect the utility model. Implementation effects of utility models and practicability of patents. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification may be used to interpret the content of the claims.

Claims (8)

1. an anti-jamming spring loaded check valve, it is characterised in that: include valve body, top cover, check plate, valve rod and valve stem sleeve, institute Stating the hollow structure that valve body is upper and lower opening, the under shed of valve body is water inlet, and body top opening part seals and is covered with top cover, Having the outlet of connection valve inner on top cover, the lower central of top cover is fixedly connected with valve stem sleeve, valve stem sleeve be vertical in Vacant duct, is provided with valve rod in valve stem sleeve, valve rod is slidably connected with valve stem sleeve, and the bottom of valve rod connects check plate, check plate Being positioned at valve inner, check plate and valve interior wall are in sealing contact and the diameter of check plate is less than the valve diameter on check plate top, The outer cover of valve stem sleeve is equipped with the lower contacts of the upper contact of spring, spring one end and check plate, the other end and top cover, described The pod apertures connected with valve stem sleeve is had on top cover.

The anti-jamming spring loaded check valve of one the most according to claim 1, it is characterised in that: described pod apertures is positioned at top cover Center.

The anti-jamming spring loaded check valve of one the most according to claim 1, it is characterised in that: described pod apertures a diameter of 8mm。

The anti-jamming spring loaded check valve of one the most according to claim 1, it is characterised in that: described check plate is circular piece Shape structure.

The anti-jamming spring loaded check valve of one the most according to claim 4, it is characterised in that: described check plate is outside sheathed There is rubber cushion.

The anti-jamming spring loaded check valve of one the most according to claim 1, it is characterised in that: described valve rod and described valve rod Spacing d < the 1mm of set inwall.

The anti-jamming spring loaded check valve of one the most according to claim 1, it is characterised in that: described outlet has two, Profile is crescent and the centrosymmetry about top cover.

The anti-jamming spring loaded check valve of one the most according to claim 1, it is characterised in that: top cover is with valve body screw thread even Connect.