CN210397828U

CN210397828U - One-way valve for cleaning machine

Info

Publication number: CN210397828U
Application number: CN201921005101.2U
Authority: CN
Inventors: 徐志敏
Original assignee: Zhejiang Zhengmao Pneumatic Machinery Co ltd
Current assignee: Zhejiang Zhengmao Pneumatic Machinery Co ltd
Priority date: 2019-06-30
Filing date: 2019-06-30
Publication date: 2020-04-24
Anticipated expiration: 2029-06-30

Abstract

The utility model belongs to the technical field of high pressure cleaner's accessory, concretely relates to a check valve for cleaning machine, the on-line screen storage device comprises a base, be equipped with the case on the base, the case is provided with ring groove, the cover is equipped with the case sealing washer between base and the case, the shaping has the fixture block with draw-in groove matched with on the case sealing washer, be equipped with the case guide holder on the case, the fixed valve cage that is provided with on the base, case guide holder lower extreme shaping has the stand pipe, has seted up in the stand pipe and has subtracted the silo, case guide holder cover is equipped with the check valve spring. The utility model discloses after the case sealing washer has been established to the cover on the case for the check valve not only can be when pressurized the play liquid high pressure of remain stable, when the pressure that the atress chamber of check valve received is less than the threshold value that the check valve set up moreover, under the drive of check valve spring, the fluid passage is stopped up rapidly with the case to the case sealing washer, has strengthened the leakproofness greatly, effectively prevents the liquid reflux.

Description

One-way valve for cleaning machine

Technical Field

The utility model belongs to the technical field of high pressure cleaner's accessory, concretely relates to check valve for cleaning machine.

Background

The high-pressure cleaning machine is a machine which uses a power device to enable a high-pressure plunger pump to generate high-pressure water to wash the surface of an object. It can peel off and wash away dirt, and reaches the purpose of cleaning the object surface. The check valve is an important part in the high-pressure cleaning machine and can ensure that the cleaning liquid can be discharged as required when being sucked and discharged.

Chinese patent No. CN207634750, publication No. 2018, 7/20/2018, which discloses a check valve device for a high pressure cleaner, including a check valve body, a check valve cover, a check valve core, and a valve core spring, and has the disadvantage that when the check valve is pressed strongly, the tightness is not sufficient, which easily causes the check valve to open the valve core before the pressure of the force does not reach the set high pressure threshold, or when the check valve is pressed, which causes the liquid to flow back because the tightness is not sufficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a check valve for cleaning machine through install the case sealing washer additional on the case, solves the check valve leakproofness not strong, can not stabilize the highly compressed problem of liquid.

The purpose of the utility model is realized like this:

the one-way valve for the cleaning machine comprises a base, wherein a valve core is arranged on the base, an annular clamping groove is formed in the valve core, a valve core sealing ring is sleeved between the base and the valve core, a clamping block matched with the clamping groove is formed in the valve core sealing ring, a valve core guide seat is arranged on the valve core, a valve cage is fixedly arranged on the base, a guide pipe is formed at the lower end of the valve core guide seat, a material reducing groove is formed in the guide pipe, and a one-way valve spring is sleeved on the valve core guide seat.

Preferably, the base is provided with a fluid channel, and an arc-shaped notch is formed at an opening at the upper side of the base.

Preferably, one end of the valve core is formed with a first arc surface matched with the arc notch, and the valve core is provided with a stress cavity sinking towards the interior of the valve core.

Preferably, a second arc surface matched with the arc-shaped notch is formed on the valve core sealing ring.

Preferably, the material reducing groove penetrates through the guide pipe, an annular groove is formed in the valve core, the guide pipe extends into the annular groove, and a certain distance is reserved between one end of the guide pipe and the bottom of the annular groove.

Preferably, the valve core guide seat is provided with an annular boss, and a closed cavity is formed between the lower end of the valve core guide seat and the valve core.

Preferably, the upper end of the valve cage is provided with a limiting block, a positioning part is formed on the limiting block, and a valve core channel for accommodating the valve core guide seat to move up and down is formed in the positioning part.

Preferably, a plurality of limiting columns which are in a step shape and used for limiting the transverse movement of the one-way valve spring are arranged on the periphery of the valve cage.

Preferably, a plurality of limiting rings parallel to the limiting blocks are arranged between the limiting columns.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

the utility model discloses after the case sealing washer has been established to the cover on the case for the check valve not only can be when pressurized the play liquid high pressure of remain stable, when the pressure that the atress chamber of check valve received is less than the threshold value that the check valve set up moreover, under the drive of check valve spring, the fluid passage is stopped up rapidly with the case to the case sealing washer, has strengthened the leakproofness greatly, effectively prevents the liquid reflux.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment.

FIG. 2 is a schematic cross-sectional view of a first embodiment.

Fig. 3 is an exploded view of the structure according to the first embodiment.

Reference numerals:

1-a base; 1 a-a fluid channel; 1 b-an arc-shaped recess; 2-a valve core; 2 a-a force-bearing cavity; 2 b-a card slot;

2 c-an annular groove; 2 d-cambered surface one; 3-valve core sealing ring; 3 a-a fixture block; 3 b-cambered surface two;

4-valve core guide seat; 4 a-boss; 4 b-a guide tube; 4 c-a cavity; 4 d-material reducing tank; 5-a one-way valve spring;

6-a valve cage; 6 a-a limiting column; 6 b-a limiting block; 6 c-a positioning section; 6 d-spool passage; 6 e-stop collar.

Detailed Description

The following describes the present invention in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1 and 3, the one-way valve for the cleaning machine comprises a base 1, a valve cage 6, a valve core guide seat 4 and a one-way valve spring 5.

As shown in fig. 2, a fluid channel 1a penetrating through the base 1 is formed in the base 1, an arc-shaped notch 1b is formed at an opening on the upper side of the base 1, a valve core 2 is arranged on the arc-shaped notch 1b, an arc-shaped surface 2d which protrudes outwards and is matched with the arc-shaped notch 1b is formed at one end, close to the base 1, of the valve core 2, and a stress cavity 2a recessed towards the inside of the valve core 2 is formed in the middle of the valve core 2.

The outer side of the middle of the valve core 2 is provided with an annular clamping groove 2b, a valve core sealing ring 3 is sleeved between the base 1 and the valve core 2, a clamping block 3a matched with the clamping groove 2b is formed on the valve core sealing ring 3, the clamping block 3a is embedded into the clamping groove 2b, the valve core sealing ring 3 is tightly combined with the valve core 2, a cambered surface two 3b matched with the cambered surface notch 1b is formed on the valve core sealing ring 3, the gap between the valve core 2 and the base 1 is filled by the valve core sealing ring 3, the sealing performance is enhanced, liquid backflow is prevented, and high liquid pressure can be stably discharged when the liquid is pressed.

The improved structure of the valve core is characterized in that a clamping ring 2c protruding outwards is arranged at the upper end of the valve core 2, a valve core guide seat 4 is arranged outside the clamping ring 2c, an annular boss 4a is arranged on one side, close to the valve core 2, of the valve core guide seat 4, the contact area between the valve core guide seat 4 and the valve core 2 is increased, the stability is enhanced, a guide pipe 4b is formed on the valve core guide seat 4, the guide pipe 4b extends downwards to the inside of the clamping ring 2c, a certain distance is reserved between one end, close to the valve core 2, of the guide pipe 4b and the upper end face of the valve core 2, a sealed cavity 4c is formed between the lower end of the valve core guide seat 4 and the valve core 2, and a material reducing groove 4d penetrating.

The valve seat is characterized in that a valve cage 6 is fixedly connected to the base 1, a plurality of stepped limiting columns 6a are arranged on the periphery of the valve cage 6, a limiting block 6b is formed at the upper end of the valve cage 6, a cylindrical positioning portion 6c protruding outwards is arranged in the middle of the limiting block 6b, and a valve core channel 6d for accommodating the guide seat to move up and down is arranged in the positioning portion 6 c.

The valve core guide seat 4 is provided with a one-way valve spring 5, one end of the one-way valve spring 5 is fixedly connected with the limiting column 6a, and the other end of the one-way valve spring is tightly attached to the boss 4a of the valve core 2.

The specific working process of the scheme is as follows:

when the high-pressure cleaning liquid impacts the stress cavity 2a of the valve core 2, the valve core 2 pushes the valve core guide seat 4 to quickly press upwards after the pressure of the high-pressure cleaning liquid reaches the set pressure threshold value of the one-way valve. When the pressure intensity is smaller than the threshold value of the one-way valve spring 5, the valve core 2 is gradually reset under the action of the one-way valve spring 5, the cambered surface I2 d of the valve core 2 and the valve core sealing ring 3 are tightly attached to the cambered notch 1b of the base 1, and the cleaning liquid is prevented from flowing back.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A check valve for a washing machine, comprising a base (1), characterized in that: the valve is characterized in that a valve core (2) is arranged on the base (1), an annular clamping groove (2b) is formed in the valve core (2), a valve core sealing ring (3) is sleeved between the base (1) and the valve core (2), a clamping block (3a) matched with the clamping groove (2b) is formed in the valve core sealing ring (3), a valve core guide seat (4) is arranged on the valve core (2), a valve cage (6) is fixedly arranged on the base (1), a guide pipe (4b) is formed at the lower end of the valve core guide seat (4), a material reducing groove (4d) is formed in the guide pipe (4b), and a one-way valve spring (5) is sleeved on the valve core guide seat (4.

2. A one-way valve for a washing machine as claimed in claim 1, characterized in that: the fluid channel (1a) is formed in the base (1), and an arc-shaped notch (1b) is formed in an opening at the upper side of the base (1).

3. A one-way valve for a washing machine as claimed in claim 2, characterized in that: one end of the valve core (2) is formed with a first arc surface (2d) matched with the arc-shaped notch (1b), and the valve core (2) is provided with a stress cavity (2a) sunken towards the interior of the valve core (2).

4. A check valve for a washing machine as claimed in any one of claims 2 or 3, wherein: and a second cambered surface (3b) matched with the cambered notch (1b) is formed on the valve core sealing ring (3).

5. A one-way valve for a washing machine as claimed in claim 1, characterized in that: the material reducing groove (4d) penetrates through the guide pipe (4b), an annular groove (2c) is formed in the valve core (2), the guide pipe (4b) extends into the annular groove (2c), and a certain distance is reserved between one end of the guide pipe (4b) and the bottom of the annular groove (2 c).

6. A check valve for a washing machine as claimed in claim 5, wherein: an annular boss (4a) is arranged on the valve core guide seat (4), and a closed cavity (4c) is formed between the lower end of the valve core guide seat (4) and the valve core (2).

7. A one-way valve for a washing machine as claimed in claim 1, characterized in that: the valve is characterized in that a limiting block (6b) is arranged at the upper end of the valve cage (6), a positioning part (6c) is formed on the limiting block (6b), and a valve core channel (6d) for accommodating the valve core guide seat (4) to move up and down is arranged in the positioning part (6 c).

8. A check valve for a washing machine as claimed in claim 7, wherein: and a plurality of limiting columns (6a) which are in a step shape and used for limiting the transverse movement of the one-way valve spring (5) are arranged on the periphery of the valve cage (6).

9. A one-way valve for a washing machine as claimed in claim 8, characterized in that: a plurality of limiting rings (6e) parallel to the limiting blocks (6b) are arranged between the limiting columns (6 a).