CN213629049U

CN213629049U - Novel check valve

Info

Publication number: CN213629049U
Application number: CN202022591596.0U
Authority: CN
Inventors: 傅贞
Original assignee: Xiamen Yibaike Sanitary Technology Co ltd
Current assignee: Xiamen Yibaike Sanitary Technology Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-07-06
Anticipated expiration: 2030-11-11

Abstract

The utility model provides a novel check valve, which comprises a valve shell, a piston, a spring and a water outlet bottom cover with a water outlet hole, wherein the valve shell is provided with a water inlet, a water outlet and a water passing channel communicated with the water inlet and the water outlet, the water passing channel is divided into a sealing matching section and a containing section with the aperture larger than that of the sealing matching section along the direction from the water inlet to the water outlet, the piston is assembled in the water passing channel, and the piston is provided with a first sealing ring which is used for being in sealing matching with the sealing matching section; a water inlet hole is formed in the end part, close to the water inlet, of the piston, a through water passing hole is formed in the outer wall of the water inlet hole, and a limiting boss extends outwards in the radial direction from the end part, close to the water outlet, of the piston; the water outlet bottom cover is assembled at the water outlet of the valve shell, the spring is arranged between the piston and the water outlet bottom cover and applies elastic force towards the water inlet direction to the piston so that the first sealing ring on the piston is in sealing and abutting connection with the sealing matching section to realize sealing.

Description

Novel check valve

Technical Field

The utility model relates to a water pipe part field, concretely relates to novel check valve.

Background

The non-return valve is a relatively common backflow-preventing component, and the general principle of the non-return valve is as follows: when the fluid flows in the positive direction, the piston is pushed to give way to communicate the channel, so that normal circulation is realized; when the positive flow is stopped, the piston can reset under the operation of the elastic piece to block the channel, so that the non-return is realized.

However, the existing check valve generally has the problem of poor size control (namely clearance control) due to the sealing fit between the piston and the valve shell, so that the function is failed. Further improvements are needed.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a novel check valve can effectively solve above-mentioned problem.

In order to achieve the above purpose, the utility model provides a technical scheme as follows:

a novel check valve comprises a valve shell, a piston, a spring and a water outlet bottom cover with a water outlet hole, wherein the valve shell is provided with a water inlet, a water outlet and a water passing channel communicated with the water inlet and the water outlet, the water passing channel is divided into a sealing matching section and an accommodating section with the aperture larger than that of the sealing matching section along the direction from the water inlet to the water outlet, the piston is assembled in the water passing channel, and the piston is provided with a first sealing ring in sealing matching with the sealing matching section; a water inlet hole is formed in the end part, close to the water inlet, of the piston, a through water passing hole is formed in the outer wall of the water inlet hole, and a limiting boss extends outwards in the radial direction from the end part, close to the water outlet, of the piston; the water outlet bottom cover is assembled at the water outlet of the valve shell, the spring is arranged between the piston and the water outlet bottom cover and applies elastic force towards the water inlet direction to the piston so that the first sealing ring on the piston is in sealing and abutting connection with the sealing matching section.

When the switch-on water source, the rivers of forward circulation flow in through the water inlet of valve housing, strike the piston, and the elasticity that the spring was overcome to the piston removes towards the delivery port direction under this impact, when removing to crossing the water hole and when holding the section intercommunication, rivers flow to holding the section through the water hole, flow to the bottom of water outlet by holding the section again, flow through the apopore of bottom of water outlet, realize the normal circulation of forward rivers. When the positive water flow stops, the piston loses the impact force of the water flow and moves towards the water inlet again under the action of the spring until the first sealing ring is in sealing fit with the sealing fit section again, and the non-return is realized.

Furthermore, corresponding assembly groove holes are formed in the water outlet bottom cover and the piston, and two ends of the spring are respectively assembled in the assembly groove holes of the water outlet bottom cover and the piston.

Further, the opening of the sealing and matching section corresponding to the accommodating section is a horn-shaped opening.

Further, a second annular sealing groove is formed in the outer peripheral surface of the valve housing, and a second sealing ring is assembled on the second annular sealing groove.

Furthermore, a water through hole or a water notch is arranged on the limiting boss of the piston.

Through the utility model provides a technical scheme has following beneficial effect:

1. adopt first sealing washer to seal up the cooperation, the piston can form the direction cooperation with water channel, has solved because of the piston card that piston and water channel's fit clearance control problem caused dies, and then leads to the function problem of inefficacy.

2. The piston is close to the tip radial outside extension of delivery port and has the restriction boss, and the restriction boss plays and stops the effect, so set up, can effectively avoid first sealing washer to cause first sealing washer to drop at high water pressure in the twinkling of an eye, this water velocity.

Drawings

FIG. 1 is a sectional view of the check valve of the embodiment in a check state;

fig. 2 is a structural sectional view of the novel check valve in the water-passing state in the embodiment.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Referring to fig. 1 and 2, the novel check valve provided in this embodiment includes a valve housing 10, a piston 20, a spring 30, and a water outlet bottom cover 40 having a water outlet hole 42, where the valve housing 10 has a water inlet 11, a water outlet (not shown, located at a lower end opening position in fig. 1 and 2), and a water passage communicating the water inlet 11 and the water outlet, the water outlet bottom cover 40 covers the water outlet hole of the valve housing 10, the piston 20 is disposed in the water passage, the water passage is divided into a sealing fitting section 101 and an accommodating section 102 having a larger aperture than the sealing fitting section 101 along a direction from the water inlet 11 to the water outlet (i.e., from top to bottom), a first annular sealing groove 23 is formed in a middle position of the piston 20, and a first sealing ring 51 is mounted on the first annular sealing groove 23; a water inlet hole 211 is formed in the end portion, close to the water inlet 11, of the piston 20, a through water passing hole 212 is formed in the outer wall of the water inlet hole 211, and a limiting boss 22 extends radially outwards from the end portion, close to the water outlet, of the piston 20; the spring 30 is disposed between the piston 20 and the water outlet bottom cover 40, and applies an elastic force to the piston 20 in a direction toward the water inlet 11, so that the first sealing ring 51 on the piston 20 is in sealing contact with the sealing engagement section 101, thereby achieving sealing.

When the water source is connected, the water flowing in the forward direction flows in through the water inlet 11 of the valve housing 10, the piston 20 is impacted, the piston 20 overcomes the elastic force of the spring 30 to move towards the direction of the water outlet (downward direction in fig. 1 and fig. 2) under the impact action, when the piston moves to the water passing hole 212 and is communicated with the containing section 102, as shown in fig. 2, the water flows to the containing section 102 through the water hole 212, then flows to the water outlet bottom cover 40 through the containing section 102, and flows out through the water outlet 42 of the water outlet bottom cover 40, so that the normal flowing of the forward water flow is realized. When the positive water flow stops, the piston 20 loses the impact force of the water flow and moves towards the water inlet again under the action of the spring 30 until the first sealing ring 51 is in sealing fit with the sealing fit section 101 again to realize non-return.

The scheme has the following advantages:

1. the first sealing ring 51 is adopted for sealing matching, the size between the piston 20 and the water passing channel only needs to meet the guiding requirement to a certain degree, the requirement on size precision is not high, a certain gap is allowed (preferably) to exist, and the gap is formed as shown in fig. 1 and fig. 2, so that the problem of functional failure caused by piston locking due to the gap control problem between the piston 20 and the water passing channel is solved.

2 the piston 20 has the restriction boss 22 near the radial outside extension of the tip of delivery port, and restriction boss 22 plays the effect that blocks first sealing washer 51, so set up, can effectively avoid first sealing washer 51 to cause in the twinkling of an eye high water pressure, this water velocity and drop.

Simultaneously, the setting of restriction boss 22, when moving towards water inlet 11 direction under the spring 30 effect, restriction boss 22 can carry out the butt with sealed cooperation section 101 and hold the step between the section 102 spacing, as shown in fig. 1, and then the biggest displacement of fine restriction piston 20 water inlet 11 direction removal prevents that piston 20 from excessively removing and making the cooperation between first sealing washer 51 and the sealed cooperation section 101 too tight. The assembly of the outlet bottom cover 40 also has a maximum displacement that limits the movement of the piston 20 in the direction of the outlet.

Further, in the present embodiment, in order to further stabilize the assembly of the spring 30, the water outlet bottom cover 40 and the piston 20 are formed with corresponding assembly slots (i.e. the assembly slot 41 on the water outlet bottom cover 40 and the assembly slot 221 on the piston 20), and both ends of the spring 30 are further respectively assembled in the assembly slot 41 on the water outlet bottom cover 40 and the assembly slot 221 on the piston 20, so that the spring 30 can be better fixed, and the spring 30 is prevented from being deviated or even separated. Of course, in other embodiments, the assembly of the spring 30 is not so limited.

Further, in this embodiment, the opening 1011 of the corresponding accommodating section 102 of the sealing and matching section 101 is a horn-shaped opening, and the horn-shaped opening 1011 also has a guiding function, so that the first sealing ring 51 can be guided and positioned and can be in sealing and matching with the first sealing ring 51 (that is, the sealing and matching section 101 is in sealing and matching with the first sealing ring 51 through the horn-shaped opening 1011), so that the sealing and matching is more accurate and stable. Of course, in other embodiments, this is not limiting.

Further, since the limiting boss 22 divides the accommodating section 102 into two parts, such as the upper chamber 1021 and the lower chamber 1022 shown in fig. 2, although a certain gap is allowed to enable the upper chamber 1021 and the lower chamber 1022 to be communicated, after all, the flux of the gap is limited, in order to ensure smooth water flow, in this embodiment, the limiting boss 22 is provided with a water passing hole 222 (in other embodiments, a water passing notch or the like is also available), so that the flux between the upper chamber 1021 and the lower chamber 1022 is increased, and the water flow can be ensured well. Of course, in other embodiments, if the gap between the limiting boss 22 and the accommodating section 102 can satisfy the flow capacity, the structure of the water passing hole 222 or the water passing notch may not be needed.

Further, in this embodiment, a second annular sealing groove 12 is formed on the outer circumferential surface of the valve housing 10, a second sealing ring 52 is assembled on the second annular sealing groove 12, and when the check valve is assembled in a water pipe, the second sealing ring 52 is in sealing fit with the inner wall of the water pipe, so that the structure is simple and the sealing effect is good. Of course, in other embodiments, this is not limiting.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A novel check valve is characterized in that: the valve comprises a valve shell, a piston, a spring and a water outlet bottom cover with a water outlet hole, wherein the valve shell is provided with a water inlet, a water outlet and a water passing channel communicated with the water inlet and the water outlet, the water passing channel is divided into a sealing matching section and an accommodating section with the aperture larger than that of the sealing matching section along the direction from the water inlet to the water outlet, the piston is assembled in the water passing channel, and the piston is provided with a first sealing ring used for being in sealing matching with the sealing matching section; a water inlet hole is formed in the end part, close to the water inlet, of the piston, a through water passing hole is formed in the outer wall of the water inlet hole, and a limiting boss extends outwards in the radial direction from the end part, close to the water outlet, of the piston; the water outlet bottom cover is assembled at the water outlet of the valve shell, the spring is arranged between the piston and the water outlet bottom cover and applies elastic force towards the water inlet direction to the piston so that the first sealing ring on the piston is in sealing and abutting connection with the sealing matching section.

2. The novel check valve as claimed in claim 1, characterized in that: and the water outlet bottom cover and the piston are provided with corresponding assembly groove holes, and two ends of the spring are respectively assembled in the assembly groove holes of the water outlet bottom cover and the piston.

3. The novel check valve as claimed in claim 1, characterized in that: the opening of the sealing matching section corresponding to the accommodating section is a horn-shaped opening.

4. The novel check valve as claimed in claim 1, characterized in that: and a second annular sealing groove is formed in the peripheral surface of the valve shell, and a second sealing ring is assembled on the second annular sealing groove.

5. The novel check valve as claimed in claim 1, characterized in that: and a water passing through hole or a water passing notch is formed in the limiting boss of the piston.