CN109268546B

CN109268546B - Overflow system

Info

Publication number: CN109268546B
Application number: CN201811181877.XA
Authority: CN
Inventors: 朱蔚
Original assignee: Ningbo Huaxun Cleaning Machinery Co ltd
Current assignee: Ningbo Huaxun Cleaning Machinery Co ltd
Priority date: 2018-10-11
Filing date: 2018-10-11
Publication date: 2024-05-03
Anticipated expiration: 2038-10-11
Also published as: CN109268546A

Abstract

The invention relates to the technical field of high-pressure cleaning machines, in particular to an overflow system, which comprises a valve seat (1), a sealing ring (2) embedded in the valve seat (1), a valve rod (3) arranged in the valve seat (1), a valve core (4) sleeved on the valve rod (3) and a spring (5) used for propping against the valve core (4), wherein the outer circumference of the valve core (4) is in interference fit with the sealing ring (2), the valve core (4) is divided into three parts along the valve rod direction, namely a first part, a second part and a third part in sequence from top to bottom, an upper overflow groove (6) is arranged on the outer circumference of the first part, and a lower overflow groove (7) is arranged on the outer circumference of the third part. The overflow system has longer service life and lower noise.

Description

Overflow system

Technical Field

The invention relates to the technical field of high-pressure cleaning machines, in particular to an overflow system.

Background

The overflow system is an important component of the high pressure washer. The prior art overflow system, as shown in fig. 1, mainly comprises a valve seat 1', a sealing ring 2' embedded in the valve seat, a valve rod 3' arranged in the valve seat, a valve core 4' sleeved on the valve rod and a spring 5' for supporting the valve core, wherein the valve core adopts a shuttle-like structure, so that the valve core is not always contacted and supported by the sealing ring, and a certain overflow clearance is required to be reserved between the valve core and the valve seat for overflow, thus the following defects are caused:

1. Because the valve core is not always in contact with the sealing ring, the sealing ring is easy to deform too much after the valve core moves to press the sealing ring under the action of pressure, so that the service life of the sealing ring is lower;

2. Because the valve core is not always contacted and abutted with the sealing ring, the valve core is equivalent to that the valve rod and the valve core are always supported by only one supporting point at the lower part, and the upper part is not always supported by the supporting point, so that when the valve core is easy to move, the valve core can shake left and right and collide with the inner wall of the valve seat, and the service life of the valve core is lower;

3. because a certain overflow clearance exists between the valve core and the valve seat, the overflow system is easy to generate whistle sound of a piercing lug because the valve core swings left and right during operation.

Disclosure of Invention

The technical problems to be solved by the invention are as follows: an overflow system with longer service life and less noise is provided.

The technical scheme adopted by the invention is as follows: the utility model provides an overflow system, includes the disk seat, inlays the sealing washer of establishing in the disk seat, sets up in the disk seat valve rod, the case of cover on the valve rod and be used for supporting the spring of case, case periphery and sealing washer interference fit, and the case divide into triplex along the valve rod direction, from the top down is first part, second part and third part in proper order, and is equipped with the overflow launder on the first part periphery, is equipped with down the overflow launder on the third part periphery.

Compared with the prior art, the invention has the following advantages: the outer circumference of the valve core is in interference fit with the sealing ring instead of being made into a shuttle shape, so that the valve core always keeps contact with and props against the sealing ring in the working process of the valve core, the sealing ring is more uniform in stress, the situation of overlarge deformation is not easy to occur, and the service life of the sealing ring is longer; the valve core is always contacted and abutted with the sealing ring when in operation, so that the upper end and the lower end of the combined body of the valve rod and the valve core are respectively provided with a supporting point, the valve core cannot shake left and right when in operation, and the service life of the valve core is longer; the valve core does not shake left and right when working, so that the generated noise is small; finally, an upper overflow groove and a lower overflow groove are arranged, so that the overflow function can be conveniently realized under the condition that the valve core is always contacted and abutted with the sealing ring.

Preferably, the valve core is cylindrical. The distance between the outer circumference of the valve core and the sealing ring is the same when the valve core moves, so that the sealing ring is stressed uniformly when the valve core moves.

Preferably, the upper overflow channels are uniformly disposed on the outer circumference of the first portion, and the lower overflow channels are uniformly disposed on the outer circumference of the third portion. Thus, the overflow effect is good.

Preferably, the upper overflow trough and the lower overflow trough are both arranged in the direction of the valve rod. The overflow groove is convenient to process, and therefore the processing cost is low.

Preferably, the groove depth of the upper overflow groove and the lower overflow groove is smaller than the diameter of the sealing ring. By the arrangement, the sealing ring is not excessively embedded into the overflow groove, so that the overflow groove is blocked.

Preferably, the valve seat is also provided with a limiting step for limiting the moving distance of the valve core. This arrangement can prevent the spring from being compressed and deformed due to excessive compression amount to affect the spring force.

Drawings

Fig. 1 is a cross-sectional view of a prior art overflow system.

Fig. 2 is a cross-sectional view of the overflow system of the present invention.

As shown in the figure: 1', valve seat of prior art overflow system; 2', sealing rings of prior art overflow systems; 3', valve stem of prior art overflow system; 4', valve cartridge of prior art overflow system; 5', springs of prior art overflow systems; 1. a valve seat; 2. a seal ring; 3. a valve stem; 4. a valve core; 5. a spring; 6. an upper overflow trough; 7. a lower overflow trough; 8. a limit step; 9. a seal; 10. a slide block; 11. and a micro-switch.

Detailed Description

The present invention will be further described with reference to the drawings and the embodiments, but the present invention is not limited to the following embodiments.

The first embodiment of the invention is an overflow system, comprising a valve seat 1, a sealing ring 2 embedded in the valve seat 1, a valve rod 3 arranged in the valve seat 1, a valve core 4 sleeved on the valve rod 3 and a spring 5 for propping against the valve core 4, wherein:

The valve core 4 is cylindrical, the outer circumference of the valve core 4 is in interference fit with the sealing ring, and the valve core 4 is always matched with the sealing ring 2 in the process that the valve core 4 moves back and forth in the valve seat 1; the valve core 4 is divided into three parts along the valve rod direction, namely a first part, a second part and a third part from top to bottom, wherein an upper overflow groove 6 is arranged on the outer circumference of the first part, a lower overflow groove 7 is arranged on the outer circumference of the third part, and the specific thickness of the three parts is determined according to the actual situation, but in the specific embodiment, the thickness of the first part is the same as that of the third part. And the clearance between the valve core and the valve seat is set to be 0.01-0.1mm, which is much smaller than the clearance in the prior art.

A sealing element 9 is also arranged between the lower end of the valve rod 3 and the valve seat 1.

And in the embodiment, the valve rod 3 further comprises a sliding block 10 and a micro switch 11, the bottom of the valve rod 3 is propped against the sliding block 10, when the valve rod 3 moves downwards, the sliding block 10 is pushed to move, and the sliding block 10 can press the contact of the micro switch 11.

The upper overflow groove 6 is mainly used for discharging water when the gun is shut down and stopping, and the lower overflow groove 7 is mainly used for discharging residual pressure of water when working.

The second embodiment differs from the first embodiment in that the valve element 4 in the second embodiment is cylindrical.

The third embodiment is different from the first embodiment in that a limiting step 8 is further arranged in the valve seat in the third embodiment, so that the valve core 4 is blocked by the limiting step 8 when moving.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; while the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications may be made to the techniques described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides an overflow system, includes disk seat (1), inlays sealing washer (2) of establishing in disk seat (1), sets up valve rod (3) in disk seat (1), case (4) and spring (5) that are used for supporting case (4) of cover on valve rod (3), its characterized in that: the valve core (4) is in interference fit with the sealing ring (2), the valve core (4) is divided into three parts along the valve rod direction, namely a first part, a second part and a third part from top to bottom in sequence, an upper overflow groove (6) is formed in the outer circumference of the first part, and a lower overflow groove (7) is formed in the outer circumference of the third part.

2. The overflow system of claim 1, wherein: the valve core (4) is cylindrical.

3. The overflow system of claim 1, wherein: the upper overflow grooves (6) are uniformly arranged on the outer circumference of the first part, and the lower overflow grooves (7) are uniformly arranged on the outer circumference of the third part.

4. The overflow system of claim 1, wherein: the upper overflow groove (6) and the lower overflow groove (7) are arranged along the valve rod direction.

5. The overflow system of claim 1, wherein: the groove depth of the upper overflow groove (6) and the lower overflow groove (7) is smaller than the diameter of the sealing ring (2).

6. The overflow system of claim 1, wherein: the valve seat (1) is also provided with a limiting step (8) for limiting the moving distance of the valve core (4).