CN114215810A

CN114215810A - Cartridge valve for flow distribution according to load pressure

Info

Publication number: CN114215810A
Application number: CN202111569263.0A
Authority: CN
Inventors: 郭晓春
Original assignee: Wuxi Hanwei Hydraulic Pneumatic Co ltd
Current assignee: Wuxi Hanwei Hydraulic Pneumatic Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-03-22

Abstract

The utility model provides a cartridge valve that carries out flow distribution according to load pressure, includes outer valve barrel and main valve core, still includes adjusting part, main valve core reset part, pilot valve subassembly, and outer valve barrel has first valve pocket and the second valve pocket that link up each other, and adjusting part pegs graft in first valve pocket and extends to in the second valve pocket, main valve core installs in adjusting screw bottom and it has the case chamber, and main valve core and adjusting screw bottom are sealed, the connection that floats, and reset part installs between interior valve barrel and main valve core and is used for the resetting of main valve core, and pilot valve subassembly installation case intracavity, pilot valve subassembly include the pilot valve core and establish the pressure part, and the pilot valve core setting is in adjusting screw bottom pilot valve core bottom and the cooperation setting of third valve mouth, establishes the pressure part and cup joints on the pilot valve core outer wall. The invention has simple structure, high integrated function, small volume and low cost, can be used for various systems which need to distribute according to load pressure, and relates to a feeding hydraulic system for biomass power generation and the like.

Description

Cartridge valve for flow distribution according to load pressure

Technical Field

The invention relates to the technical field of valve bodies, in particular to a cartridge valve for flow distribution according to load pressure.

Background

For some working conditions with higher requirements and more complex working conditions, a single universal regulating valve cannot meet the requirements, and a plurality of valve bodies and a complex electric control system are required to be combined for use, but the mode enables the whole combined valve body to be large in size, brings great disadvantages to installation and use, is high in cost, and cannot be adaptively switched according to loads.

For example, a floating type double-valve-seat double-valve-element regulating valve with application number 2017206894045 has a complicated structure and high manufacturing cost, and cannot be adaptively switched according to load.

Therefore, a cartridge valve which has a simple structure, a small volume and a low cost and can be adaptively switched according to the load is urgently needed.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a cartridge valve, a hydraulic system and a material forming method which have the advantages of simple structure, high integrated function, small volume and low cost and can distribute flow according to load pressure.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a cartridge valve for flow distribution according to load pressure comprises an outer valve sleeve, a main valve core, an adjusting component, a main valve core resetting component and a pilot valve component,

the outer valve pocket is provided with a first valve cavity and a second valve cavity which are communicated with each other, the outer valve pocket is provided with a first oil port, a second oil port and a third oil port which are communicated with the first valve cavity and the second valve cavity, the third oil port is arranged at the bottom of the second valve cavity,

the adjusting assembly is inserted in the first valve cavity and extends into the second valve cavity, the adjusting assembly comprises an adjusting screw rod and an inner valve sleeve, the adjusting screw rod is inserted in the first valve cavity and extends into the second valve cavity, and the inner valve sleeve is installed at the top of the outer valve sleeve and is in threaded connection with the inner valve sleeve.

The main valve core is arranged at the bottom of the adjusting screw and is provided with a valve core cavity, the main valve core is provided with a first valve port, a second valve port and a third valve port which are communicated with the valve core cavity, the main valve core is connected with the bottom of the adjusting screw in a sealing and floating way,

the reset component is arranged between the inner valve sleeve and the main valve core and is used for resetting the main valve core,

the pilot valve assembly is installed in the valve core cavity and comprises a pilot valve core and a pressure setting part, the pilot valve core is arranged at the bottom of the adjusting screw rod and is coaxial with the adjusting screw rod, the bottom of the pilot valve core is matched with the third valve port, and the pressure setting part is sleeved on the outer wall of the pilot valve core.

Further, the inner diameter of the first valve cavity is larger than that of the second valve cavity.

Further, the adjusting assembly further comprises a clamping nut which is arranged at the top of the inner valve sleeve and used for locking the adjusting screw rod.

Further, a sealing piece is installed at the bottom of the adjusting screw rod.

Further, the reset component is a first spring, and the pressure setting component is a second spring.

Furthermore, the pilot valve core is inserted in the adjusting screw rod, and the pilot valve core is fixedly connected with the adjusting screw rod or integrally formed.

Furthermore, sealing elements are arranged between the first oil port and the second oil port, between the inner valve sleeve and the outer valve sleeve, on the side wall of the top of the outer valve sleeve and on the side wall of the bottom of the outer valve sleeve.

In another embodiment, the valve body further has a fourth oil port penetrating the first valve chamber.

The invention has the following beneficial effects:

1. a cartridge valve structure is adopted, so that the valve block is small and compact in size;

2. the function integration is high, the combined actions of several valves are integrated, the volume is reduced, and the cost is reduced;

3. the valve can be directly integrated in the oil cylinder, so that the structural volume is further reduced;

4. the independent hydraulic system or the material extrusion method can be adaptively switched according to the load condition, so that a complex electric control system is omitted, the system can be used for various systems needing distribution according to the load pressure, and relates to new energy conveying systems such as feeding hydraulic pressure of biomass power generation and the like, and carbon emission reduction is really realized.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic illustration of a cartridge valve;

FIG. 2 is a system diagram of a hydraulic drive system under low load fast-out conditions;

FIG. 3 is a schematic structural view of the cartridge valve in a high load slow outlet condition;

FIG. 4 is a system diagram of the hydraulic drive system during a high load slow-out condition;

FIG. 5 is a schematic diagram of a hydraulic drive system switching state;

in the figure: 1. an outer valve housing; 11. a first valve chamber; 12. a second valve cavity; 13. a first oil port; 14. a second oil port; 15. a third oil port; 2. a main valve element; 21. a spool cavity; 22. a first valve port; 23. a second valve port; 24. a third valve port; 3. an adjustment assembly; 31. adjusting the screw rod; 32. an inner valve housing; 33. tightening the nut; 4. a main spool reset component; 5. a pilot valve assembly; 51. a pilot valve spool; 52. a pressure setting component; 6. a first cylinder; 7. a second cylinder; 8. a hydraulic station; 9. a cartridge valve.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention more readily understood by those skilled in the art, and thus will more clearly and distinctly define the scope of the invention.

As shown in fig. 1-5, in the first embodiment:

a cartridge valve 9 for flow distribution according to load pressure comprises an outer valve sleeve 1, a main valve element 2, an adjusting component 3, a main valve element 2 resetting component and a pilot valve component 5,

the outer valve pocket 1 has a first valve cavity 11 and a second valve cavity 12 which are communicated with each other, the inner diameter of the first valve cavity 11 is larger than that of the second valve cavity 12, the outer valve pocket 1 has a first oil port 13, a second oil port 14 and a third oil port 15 which are communicated with the first valve cavity 11 and the second valve cavity 12, the third oil port 15 is arranged at the bottom of the second valve cavity 12,

the adjusting assembly 3 is inserted in the first valve cavity 11 and extends into the second valve cavity 12, the adjusting assembly 3 comprises an adjusting screw 31, an inner valve housing 32 and a clamping nut 33, the adjusting screw 31 is inserted in the first valve cavity 11 and can extend into the second valve cavity 12, the inner valve housing 32 is mounted at the top of the outer valve housing 1 and is in threaded connection with the inner valve housing 32, and the clamping nut 33 is mounted on the pressure adjusting screw 31 in a sleeved mode and is used for mounting the pressure adjusting screw 31 at the outer end of the adjusting guide nut.

The main valve element 2 is installed at the bottom of the adjusting screw 31 and is provided with a valve element cavity 21, the main valve element 2 is provided with a first valve port 22, a second valve port 23 and a third valve port 24 which are communicated with the valve element cavity 21, the main valve element 2 is in sealed floating connection with the bottom of the adjusting screw 31, and a sealing element which can be a sealing ring is arranged at the bottom of the adjusting screw 31.

The reset member is installed between inner valve housing 32 and main spool 2 and is used for resetting main spool 2, and the reset member is a first spring.

The pilot valve assembly 5 is installed in the valve core cavity 21, the pilot valve assembly 5 includes a pilot valve core 51 and a pressure setting component 52, the pilot valve core 51 is arranged at the bottom of the adjusting screw 31 and is coaxially arranged with the adjusting screw 31, the pilot valve core 51 is inserted into the adjusting screw 31, the pilot valve core 51 is fixedly connected with the adjusting screw 31 or integrally formed, the bottom of the pilot valve core 51 is matched with the third valve port 24, the pressure setting component 52 is sleeved on the outer wall of the pilot valve core 51, and the pressure setting component 52 is a second spring.

Further, sealing elements are arranged between the first oil port 13 and the second oil port 14, between the inner valve sleeve 32 and the outer valve sleeve 1, on the top side wall of the outer valve sleeve 1 and on the bottom side wall of the outer valve sleeve 1, and the sealing elements may be sealing rings.

Example two: different from the first embodiment, the valve body further has a fourth oil port penetrating through the first valve chamber 11.

The following is to specifically explain the cartridge valve 9 in combination with a hydraulic system, and a hydraulic drive system comprises a first oil cylinder 6, a second oil cylinder 7 and a hydraulic station 8, wherein piston rods of the first oil cylinder 6 and the second oil cylinder 7 are connected and move synchronously, the hydraulic drive system further comprises a cartridge valve 9 for flow distribution according to load pressure, the hydraulic station 8 is respectively connected with a third oil port 15 of the cartridge valve 9 and a rodless cavity of the first oil cylinder 6, a rod cavity of the first oil cylinder 6 is connected with an oil tank of the hydraulic station 8 through an oil return pipeline, a rod cavity of the second oil cylinder 7 is connected with a rod cavity of the first oil cylinder 6, a rodless cavity of the second oil cylinder 7 is connected with a second oil port 14 of the cartridge valve 9, and a first oil port 13 of the cartridge valve 9 is connected with the oil return pipeline.

The best mode (embodiment one) of the present invention is combined with an oil cylinder system, and the working principle of the cartridge valve 9 is explained as follows:

for the adjustment of the pressure value, the oil passage switching pressure value of the cartridge valve 9 is determined by the spring force value of the spring, and the spring force of the spring can be set in advance by adjusting the position of the adjustment screw 31.

For the adjustment of the adjusting screw 31, the nut 33 is first loosened and tightened, and then the adjusting screw 31 is rotated to raise or lower the adjusting screw 31, and when the adjusting screw 31 is raised, the adjusting screw 31 releases the pressure setting member 52, the elastic force of the pressure setting member 52 becomes small, and the oil passage switching pressure value becomes small, and when the adjusting screw 31 is lowered, the adjusting screw 31 compresses the pressure setting member 52, and the elastic force of the pressure setting member 52 becomes large, and the oil passage switching pressure value becomes large. When the adjusting screw 31 is rotated to a desired position, the nut 33 is tightened to lock the adjusting screw 31, and the elastic force of the reset component is used for resetting the pilot valve.

If the oil path switching pressure value of the cartridge valve 9 is PT, when the loads borne by the first oil cylinder 6 and the second oil cylinder 7 are small and the hydraulic pressure value of the third oil port 15 is smaller than PT, the working state of the hydraulic driving system of the first oil cylinder 6 and the second oil cylinder 7 is as shown in fig. 2, the pressure of the third oil port 15 is not enough to drive the pilot valve to overcome the elastic force of the reset component to rise, and the pilot valve is in the position shown in fig. 1 under the pressure of the reset component.

If the oil path switching pressure value of the cartridge valve 9 is PT, when the load borne by the first oil cylinder 6 and the second oil cylinder 7 is large and the hydraulic pressure value of the third oil port 15 is greater than PT, the working state of the hydraulic driving system of the first oil cylinder 6 and the second oil cylinder 7 is as shown in fig. 4, the pressure of the third oil port 15 is sufficient to drive the pilot valve to overcome the elastic force of the reset component to rise, and the pilot valve is in the position shown in fig. 3 under the pressure of the reset component.

It should be noted that, in the following description,

1. the cartridge valve 9 is suitable for applications where the flow distribution mode is switched according to the load;

2. the load switching pressure point is set by an elastic component;

3. the switching pressure of the flow distribution switching point is set to be PT, and when the load pressure is less than PT, the working state of the system is as shown in the figure 1-2 (figure 1 is the working condition of the cartridge valve 9 when the oil cylinder is in low load and is quickly discharged):

a. the pressure oil is fully supplied to the rodless cavity of the first oil cylinder 6, and the rod cavity of the first oil cylinder 6 is communicated with the two cavities of the second oil cylinder 7;

b. because the first oil cylinder 6 and the second oil cylinder 7 are synchronous by the frame, when the first oil cylinder 6 is pushed out, the second oil cylinder 7 passively stretches out;

c. oil in rod cavities of the first oil cylinder 6 and the second oil cylinder 7 is supplemented into a rodless cavity of the oil cylinders, and redundant oil is discharged back to the oil tank through a one-way valve;

d. in the state, all oil liquid enters the rodless cavity of the first oil cylinder 6, the pressure is low, and the system works as a small load to quickly discharge;

4. when the load pressure is greater than PT, the system operating state is as shown in fig. 3-4:

a. the valve core is pushed by pressure oil, the rodless cavities of the first oil cylinder 6 and the second oil cylinder 7 are communicated, the rod cavities of the first oil cylinder 6 and the second oil cylinder 7 are communicated, and the oil way of the upper rodless cavity is blocked;

b. the first oil cylinder 6 and the second oil cylinder 7 simultaneously exert thrust and push upwards, and oil liquid in rod cavities of the two cylinders flows back to the oil tank through the one-way valve;

c. in the state, oil enters two cylinder rodless cavities at the same time, the pressure is high, and the system works as a large load and slowly discharges.

Compared with the prior art, the invention has the advantages of simple structure, high integrated function, small volume and low cost, and can carry out flow distribution according to the load pressure.

In all examples shown and described herein, any particular value should be construed as merely exemplary, and not as a limitation, and thus other examples of example embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "disposed," "provided," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Finally, it should be noted that: the above-mentioned embodiments are merely specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.

Claims

1. A cartridge valve for flow distribution according to load pressure, comprising an outer valve housing and a main valve element, characterized in that: also comprises an adjusting component, a main valve core resetting component and a pilot valve component,

2. The cartridge of claim 1 wherein the first valve chamber has an inner diameter greater than an inner diameter of the second valve chamber.

3. The cartridge valve according to claim 2, wherein the adjustment assembly further comprises a jam nut mounted on the top of the inner housing and adapted to lock the adjustment screw.

4. A cartridge valve for dispensing a flow based on load pressure as in claim 3 wherein the adjustment screw has a seal mounted to the bottom thereof.

5. The cartridge of claim 4 wherein the return member is a first spring and the pressure setting member is a second spring.

6. The cartridge valve according to claim 5, wherein the pilot valve cartridge is inserted into the adjusting screw, and the pilot valve cartridge is fixedly connected to or integrally formed with the adjusting screw.

7. The cartridge valve according to claim 6, wherein a sealing member is disposed between the first port and the second port, between the inner valve housing and the outer valve housing, on the top side wall of the outer valve housing, and on the bottom side wall of the outer valve housing.

8. The cartridge valve of claim 1 wherein the valve body further comprises a fourth port extending through the first chamber.