CN219953794U - Screw thread cartridge formula return circuit flushing valve - Google Patents

Abstract

The utility model provides a threaded plug-in type loop flushing valve which comprises a valve core, a left valve seat, a right valve seat, a left spring, a right spring and a valve sleeve, wherein the valve sleeve sequentially increases in size from left to right, a left step and a right step are arranged on the valve sleeve, a first opening is arranged between the left step and the right step, and a second opening is arranged on the right side of the right step; the valve core is movably arranged in the valve sleeve, the left valve seat is connected with the valve core for controlling the opening and closing of the valve sleeve cavity at the left side of the first opening, and the right valve seat is connected with the valve core for controlling the opening and closing of the valve sleeve cavity at the right side of the first opening; the left spring is arranged on one side of the left valve seat, and the right spring is arranged on one side of the right valve seat. The application range of the flushing valve can be expanded by the structure.

Description

Screw thread cartridge formula return circuit flushing valve

Technical Field

The utility model mainly relates to the technical field related to hydraulic elements, in particular to a threaded plug-in type loop flushing valve.

Background

In the prior art, US patent No. 6371149B 1 by EATON discloses a hot oil flush shuttle valve for use in a closed hydraulic circuit, which has a simple structure and is easy to work and reliable in parts machining. However, this valve also has significant drawbacks: that is, the valve can only be installed and applied to the occasion of processing the through hole, when the size of the part is large and the through hole can not be processed, the valve can not be installed and used, so the application of the flushing shuttle valve is greatly limited.

Disclosure of Invention

In order to solve the defects of the prior art, the utility model combines the prior art, and provides the threaded plug-in type loop flushing valve which can expand the application range of the flushing valve from practical application.

The technical scheme of the utility model is as follows:

the threaded plug-in type loop flushing valve comprises a valve core, a left valve seat, a right valve seat, a left spring, a right spring and a valve sleeve, wherein the size of the valve sleeve is sequentially increased from left to right, a left step and a right step are arranged on the valve sleeve, a first opening is arranged between the left step and the right step, and a second opening is arranged on the right side of the right step;

the valve core is movably arranged in the valve sleeve, the left valve seat is connected with the valve core for controlling the opening and closing of the valve sleeve cavity at the left side of the first opening, and the right valve seat is connected with the valve core for controlling the opening and closing of the valve sleeve cavity at the right side of the first opening;

the left spring is arranged on one side of the left valve seat, and the right spring is arranged on one side of the right valve seat.

Further, a first sealing element is arranged at the left step, and a second sealing element is arranged at the right step.

Further, the right end of the valve sleeve is provided with a plug, the plug is positioned on the right side of the second opening, and a third sealing piece is arranged at the plug.

Further, the plug is in threaded connection with the valve sleeve.

Further, an external thread is arranged at the outer diameter of the right end of the valve sleeve.

Further, a left conical surface or a left arc surface is arranged at the position on the valve sleeve matched with the left valve seat;

and a right conical surface or a right arc surface is arranged at the position on the valve sleeve matched with the right valve seat.

Further, a left limiting boss for limiting the left valve seat and a right limiting boss for limiting the right valve seat are arranged on the valve core.

Further, the flushing valve is arranged in the base body for use, and the base body is provided with a first oil inlet cavity, a second oil inlet cavity and an oil outlet cavity;

the left end of the flushing valve is communicated with the first oil inlet cavity, the first opening of the flushing valve is communicated with the oil outlet cavity, and the second opening of the flushing valve is communicated with the second oil inlet cavity.

The utility model has the beneficial effects that:

1. according to the utility model, the problem that the blind hole of the original flushing valve cannot be installed can be solved by adding the structural design of the valve sleeve and the plug, so that the application range of the valve is widened.

2. In the utility model, besides the valve sleeve, the plug, the sealing element and other parts are all through holes for installing the parts, so that the universality of the parts is realized, and the designed valve sleeve structure has the advantages of convenient processing and convenient assembly.

Drawings

FIG. 1 is a schematic view of a cartridge-type flush valve according to the present utility model.

Fig. 2 is a schematic view of the valve housing structure of the present utility model.

FIG. 3 is a schematic view of the use of the flush valve of the present utility model.

Detailed Description

The utility model will be further described with reference to the accompanying drawings and specific embodiments. It is to be understood that these examples are illustrative of the present utility model and are not intended to limit the scope of the present utility model. Further, it will be understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the utility model, and equivalents thereof fall within the scope of the utility model as defined by the claims.

The present embodiment provides a threaded cartridge loop flush valve.

The whole structure of the threaded plug-in type loop flushing valve is shown in fig. 1, and mainly comprises a valve core 4, a left valve seat 2, a right valve seat 7, a left spring 1, a right spring 8 and a valve sleeve 5. As shown in fig. 2, the valve sleeve 5 is designed to be sequentially enlarged from left to right (the left and right are based on the left and right in the drawing, i.e. the left side of the axis of the valve core 4 is left and the right side of the axis is right), so as to facilitate the installation of the flushing valve in the hole. The valve sleeve 5 is provided with a left step 5a and a right step 5b, the size of the left step 5a is smaller than that of the right step 5b, a first opening 5c is arranged between the left step 5a and the right step 5b, and a second opening 5d is arranged on the right side of the right step 5 b.

The valve core 4 is movably arranged in the valve sleeve 5, namely, the valve core 4 can move left and right in the valve sleeve 5 along the axial direction, the left valve seat 2 is sleeved on one side of the valve core 4 and limited by a left limiting boss on the valve core 4, the left valve seat 2 is used for controlling the opening and closing of a cavity in the valve sleeve 5 on the left side of the first opening 5c, namely, when the left valve seat 2 moves leftwards under the pushing of the valve core 4, a channel on the left side of the valve sleeve 5 can be opened, the first opening 5c is communicated with the first oil inlet cavity A, and when the left valve seat 2 moves rightwards under the driving of the left spring 1, the channel on the left side of the valve sleeve 5 can be closed. Further, in order to ensure sealing performance, a left conical surface or a left arc surface 5e is arranged on the valve sleeve 5 at a position matched with the left valve seat 2.

The right valve seat 7 is sleeved on the other side of the valve core 4 and is limited by a right limiting boss on the valve core 4, the right valve seat 2 is used for controlling the opening and closing of the cavity in the valve sleeve 5 on the right side of the first opening 5c, namely, when the right valve seat 7 is pushed by the valve core 4 to move rightwards, a channel on the right side of the valve sleeve 5 can be opened, the first opening 5c is communicated with the second opening 5d, and when the right valve seat 7 is driven by the right spring 8 to move leftwards, the channel on the right side of the valve sleeve 5 can be closed. Further, in order to ensure sealing performance, a right conical surface or a right circular arc surface 5f is arranged on the valve sleeve 5 at a position matched with the right valve seat 7.

The right end of the valve sleeve 5 is provided with external threads, so that the flushing valve can be fixedly arranged in the through hole or the blind hole in a spiral screwing mode. Meanwhile, a plug 10 is screw-mounted at the right end.

Preferably, in order to ensure the sealing effect of the flush valve in use, a first seal 3 is provided at the left step 5a, a second seal 6 is provided at the right step 5b, and a third seal 9 is provided at the stopper 10.

Referring to fig. 3, the present flush valve is assembled in a product. The seat body is provided with a first oil inlet cavity A, a second oil inlet cavity B and an oil outlet cavity F, wherein the first oil inlet cavity A and the second oil inlet cavity B are high-pressure cavities, and when the seat body works, one cavity is always high-pressure, and the oil outlet cavity F is a low-pressure cavity and is connected with a shell cavity of the pump through a damping hole or a valve.

The first seal 3, the second seal 6 and the third seal 9 partition the first oil intake chamber a, the second oil intake chamber B and the oil outlet chamber F in the drawing. The first opening 5c communicates with the oil outlet chamber F, and the second opening 5d communicates with the second oil inlet chamber B.

In the working process, when the first oil inlet cavity A is a high-pressure cavity, the valve core 4 can be pushed to move rightwards, so that the second oil inlet cavity B is communicated with the oil outlet cavity F, when the second oil inlet cavity B is a high-pressure cavity, the valve core 4 can be pushed to move leftwards, so that the first oil inlet cavity A is communicated with the oil outlet cavity F, high-pressure oil in a system can be replaced, the temperature of the system is reduced, and system impurities can be removed.

In the embodiment, the problem of blind hole installation of the traditional flushing valve can be solved by adding a valve sleeve and a plug, and the improved flushing valve can be applied to blind holes or through holes. In addition, in the overall structural design of the embodiment, the valve sleeve, the plug and the like are easy to process, other parts can be universal parts directly, the overall assembly is simple and quick, the cost can be reduced, and the universality of the valve is improved.

Claims (8)

1. The threaded plug-in type loop flushing valve comprises a valve core, a left valve seat, a right valve seat, a left spring and a right spring, and is characterized by further comprising a valve sleeve, wherein the valve sleeve sequentially increases in size from left to right, a left step and a right step are arranged on the valve sleeve, a first opening is arranged between the left step and the right step, and a second opening is arranged on the right side of the right step;

the valve core is movably arranged in the valve sleeve, the left valve seat is connected with the valve core for controlling the opening and closing of the valve sleeve cavity at the left side of the first opening, and the right valve seat is connected with the valve core for controlling the opening and closing of the valve sleeve cavity at the right side of the first opening;

the left spring is arranged on one side of the left valve seat, and the right spring is arranged on one side of the right valve seat.

2. The thread cartridge circuit flush valve according to claim 1, wherein a first seal is provided at the left step and a second seal is provided at the right step.

3. The thread cartridge loop flush valve of claim 1, wherein the right end of the valve housing is provided with a plug positioned to the right of the second opening, and a third seal is provided at the plug.

4. The threaded cartridge circuit flush valve of claim 3, wherein the plug is threadably connected to the valve housing.

5. The thread cartridge circuit flush valve according to claim 1, wherein the valve housing has external threads at an outer diameter of the right end.

6. The thread cartridge circuit flush valve according to claim 1, wherein a left conical surface or a left circular arc surface is provided on the valve housing at a position where the valve housing is engaged with the left valve seat;

and a right conical surface or a right arc surface is arranged at the position on the valve sleeve matched with the right valve seat.

7. The thread cartridge type loop flushing valve of claim 1, wherein a left limit boss for left valve seat limit and a right limit boss for right valve seat limit are provided on the valve core.

8. The threaded cartridge circuit flush valve according to any one of claims 1 to 7, wherein the flush valve is mounted for use in a housing having a first oil inlet chamber, a second oil inlet chamber, and an oil outlet chamber;

the left end of the flushing valve is communicated with the first oil inlet cavity, the first opening of the flushing valve is communicated with the oil outlet cavity, and the second opening of the flushing valve is communicated with the second oil inlet cavity.