CN220792178U - Leak-proof one-way valve structure - Google Patents

Abstract

The utility model discloses a leakage-proof one-way valve structure, which comprises a seat body and a spring, wherein the seat body is of a revolving body structure penetrating up and down, an end cover is connected to the lower end port of the seat body in a screwed manner, a valve sleeve is connected to the lower portion of an inner cavity of the seat body in a screwed manner and concentric with the seat body in a screwed manner, a conical valve cavity is arranged in the middle of the upper side of the valve sleeve, a conical valve clack is clamped in the valve cavity in an adapting manner, an output port communicated with the inner cavity is arranged at the upper end of the seat body, a circular pipe portion extending inwards is arranged at the lower end of the output port, a plurality of through holes are uniformly formed in the lower end of the circular pipe portion in a sealing manner along the circumference, the spring is connected between the lower end of the circular pipe portion and the valve clack, the spring is used for applying thrust to the valve cavity, and an input pipe is arranged at the lower end of the valve sleeve and penetrates through the end cover and is in clearance fit with the end cover. After the input end reaches the opening pressure, the valve clack is pushed by the hydraulic pressure to move upwards, a gap is formed between the valve clack and the valve cavity for liquid circulation, the valve clack and the valve cavity are in conical surface contact, the contact area is large, and leakage is prevented when the valve clack is blocked reversely.

Description

Leak-proof one-way valve structure

Technical Field

The utility model relates to the technical field of valves, in particular to a leakage-proof one-way valve structure.

Background

The principle of the one-way valve itself is that the medium inside flows in one direction, preventing reverse flow. Normally, the valve works automatically, when the valve clack is opened to reversely flow under the action of the liquid pressure of unidirectional flow, the valve clack is overlapped on the valve seat through the liquid pressure and the valve clack, so that the flow is cut off, the unidirectional valve is arranged at the outlet position of the pump, the damage to the oil pump caused by the rising of the pressure of the system can be effectively avoided, and the non-return effect is realized. The prior check valve mostly adopts a spring and steel ball structure (Chinese patent publication No. CN219282510U and CN 218625539U), when the check valve is connected with reverse pressure, the steel ball is tightly pressed with the valve sleeve for blocking, but the steel ball is generally in line contact with the valve sleeve, and the sealing and leakage preventing effects are not ideal.

Disclosure of utility model

The utility model aims to provide a leakage-proof one-way valve structure so as to solve the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a leak protection check valve structure, includes pedestal and spring, the pedestal is the solid of revolution structure that runs through from top to bottom in the middle part, the lower port spiro union of pedestal has the end cover, and the inner chamber lower part spiro union of pedestal has the valve pocket, and the valve pocket is solid of revolution structure and with the pedestal concentricity, the upside middle part of valve pocket is equipped with conical valve pocket, the looks adaptation joint has conical valve clack in the valve pocket, the upper end of pedestal is equipped with the delivery outlet with the inner chamber intercommunication, and the lower extreme of delivery outlet is equipped with inwards extending pipe portion, and the lower extreme of pipe portion is sealed and is equipped with a plurality of through-holes along the circumference evenly, connects the spring between the lower extreme of pipe portion and the valve clack, and the spring is used for applys the thrust to the valve pocket, and the lower extreme of valve pocket is equipped with the input tube, the input tube runs through the end cover and its clearance fit, the inner end of input tube and the little mouth end intercommunication of valve pocket.

Preferably, the lower extreme fixed mounting of pipe portion has concentric round bar, and the middle part of valve clack is equipped with axial jack, and the lower extreme and the jack phase-match grafting of round bar, the spring cup joints in the outside of round bar.

Preferably, the valve clack is provided with at least two annular grooves on the conical surface, and sealing rings are respectively arranged in the annular grooves.

Compared with the prior art, the utility model has the beneficial effects that: after the input end reaches the opening pressure, the valve clack is pushed by the hydraulic pressure to move upwards, a gap is formed between the valve clack and the valve cavity for liquid circulation, the valve clack and the valve cavity are in conical surface contact, the contact area is large, and leakage is prevented when the valve clack is blocked reversely.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

Fig. 2 is a schematic diagram of a front view structure of the present utility model.

In the figure: 1. a base; 2. an end cap; 3. a valve sleeve; 4. an input tube; 5. a valve cavity; 6. a valve flap; 7. a spring; 8. a round bar; 9. a circular tube part; 10. and an output port.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-2, the present utility model provides a technical solution: the utility model provides a leak protection check valve structure, including pedestal 1 and spring 7, pedestal 1 is the solid of revolution structure that runs through from top to bottom in the middle part, pedestal 1's lower port spiro union has end cover 2, pedestal 1's inner chamber lower part spiro union has valve pocket 3, valve pocket 3 is solid of revolution structure and concentric with pedestal 1, valve pocket 3's upside middle part is equipped with conical valve pocket 5, the diameter of valve pocket 5 input one end is less than the diameter of output one end, the looks adaptation joint has conical valve clack 6 in valve pocket 5, valve clack 6 is equipped with two at least annular at the conical surface, install the sealing washer in the annular respectively, when there is liquid pressure in the upside of valve clack 6, valve clack 6 receives decurrent pressure, compress tightly between valve clack 6 and the valve pocket 5 and realize sealing.

The upper end of the seat body 1 is provided with an output port 10 communicated with the inner cavity, and the output port 10 is provided with a step with a smaller diameter so as to be convenient for plugging with a pipeline. The lower extreme of delivery outlet 10 is equipped with inwards extending pipe portion 9, and pipe portion 9 and the inner chamber of pedestal 1 exist annular clearance, and the lower extreme of pipe portion 9 is sealed and evenly is equipped with a plurality of through-holes along the circumference. A spring 7 is connected between the lower end of the circular tube part 9 and the valve clack 6, the spring 7 is used for applying thrust to the valve clack 6 to the valve cavity 5, and after the input liquid pressure overcomes the elasticity of the spring 7, the one-way valve is opened. The lower extreme fixed mounting of pipe portion 9 has concentric round bar 8, and the middle part of valve clack 6 is equipped with axial jack, and the lower extreme and the jack assorted grafting of round bar 8, and round bar 8 are used for maintaining the stability of valve clack 6 axial displacement, and spring 7 cup joints in the outside of round bar 8. The lower end of the valve sleeve 3 is provided with an input pipe 4, the input pipe 4 penetrates through the end cover 2 and is in clearance fit with the end cover, and the inner end of the input pipe 4 is communicated with the small opening end of the valve cavity 5.

Working principle: after the input pipe 4 is connected with hydraulic pressure and reaches the opening pressure, the hydraulic pressure pushes the valve clack 6 to move upwards, a gap is formed between the valve clack 6 and the valve cavity 5 for liquid circulation, and the larger the input pressure is, the larger the opening gap is. The valve clack 6 is in conical surface contact with the valve cavity 5, so that the contact area is large, and leakage is prevented during reverse cut-off.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. The utility model provides a leak protection check valve structure, includes pedestal (1) and spring (7), and pedestal (1) are solid of revolution structure that runs through from top to bottom in the middle part, its characterized in that: the utility model discloses a valve pocket, including valve pocket (3), valve pocket (5) in the lower port spiro union of pedestal (1) has end cover (2), and the inner chamber lower part spiro union of pedestal (1) has valve pocket (3), valve pocket (3) upside middle part is equipped with conical valve pocket (5), adaptation joint has conical valve clack (6) in valve pocket (5), the upper end of pedestal (1) is equipped with delivery outlet (10) with the inner chamber intercommunication, and the lower extreme of delivery outlet (10) is equipped with inwards extension pipe portion (9), and the lower extreme of pipe portion (9) is sealed and is equipped with a plurality of through-holes along the circumference evenly, connects spring (7) between the lower extreme of pipe portion (9) and valve clack (6), and spring (7) are used for exerting thrust to valve pocket (5) to valve clack (6), and the lower extreme of valve pocket (3) is equipped with input tube (4), input tube (4) run through end cover (2) and with clearance fit thereof, the inner end of input tube (4) communicates with the little mouth end of valve pocket (5).

2. The leak-proof check valve structure as defined in claim 1, wherein: the lower extreme fixed mounting of pipe portion (9) has concentric round bar (8), and the middle part of valve clack (6) is equipped with axial jack, and the lower extreme and the jack phase-match grafting of round bar (8), outside at round bar (8) is cup jointed to spring (7).

3. The leak-proof check valve structure as defined in claim 1, wherein: the valve clack (6) is provided with at least two annular grooves on the conical surface, and sealing rings are respectively arranged in the annular grooves.