CN216200982U

CN216200982U - Pilot valve and four-way valve

Info

Publication number: CN216200982U
Application number: CN202122368721.6U
Authority: CN
Inventors: 杜飞龙; 张飞
Original assignee: Nanchang Zhonghao Machinery Co ltd
Current assignee: Nanchang Zhonghao Machinery Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-04-05
Anticipated expiration: 2031-09-28

Abstract

The utility model provides a pilot valve and a four-way valve, wherein the pilot valve comprises: the valve body is provided with a valve cavity, and the side wall of the valve body is provided with a mounting hole communicated with the valve cavity; the valve seat is arranged in the mounting hole and is provided with a valve hole and a circulation hole which are communicated with each other, the valve hole is communicated with the valve cavity, and the circulation hole is used for connecting a pipe; the three valve holes are communicated with the three circulation holes in a one-to-one correspondence manner, the three valve holes are arranged at intervals, and connecting lines of circle centers of the three circulation holes form an isosceles triangle; the isosceles triangle comprises a first inner angle A, a second inner angle B and a third inner angle F, wherein the angle B is equal to or less than the angle F, and the angle B is equal to or more than 18 degrees and is equal to or less than 22 degrees; a sliding portion slidably disposed within the valve chamber. By the technical scheme provided by the utility model, the process requirement of the connecting pipe butted with the circulation hole is ensured, the circulation area between the valve hole and the circulation hole is increased, and the performance of the pilot valve and the four-way valve is improved.

Description

Pilot valve and four-way valve

Technical Field

The utility model relates to the technical field of pilot valves, in particular to a pilot valve and a four-way valve.

Background

At present, a pilot valve is provided with a plurality of circulation holes, a plurality of capillary tubes are butted in the plurality of circulation holes one by one, and for the spatial position relationship of the plurality of circulation holes on the pilot valve, an eccentric design mode is usually adopted to ensure the processing technology requirements of the capillary tubes butted with the circulation holes and prevent the plurality of butted capillary tubes from interfering.

The eccentric angle of the eccentric design of the circulation hole in the prior art can not ensure the maximum utilization of the circulation area between the valve hole and the circulation hole, so that the product performance is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pilot valve and a four-way valve, which are used for improving the performance of the pilot valve in the prior art.

In order to solve the above-mentioned problems, according to an aspect of the present invention, there is provided a pilot valve including: the valve body is provided with a valve cavity, and the side wall of the valve body is provided with a mounting hole communicated with the valve cavity; the valve seat is arranged in the mounting hole and is provided with a valve hole and a circulation hole which are communicated with each other, the valve hole is communicated with the valve cavity, and the circulation hole is used for connecting a pipe; the three valve holes are communicated with the three circulation holes in a one-to-one correspondence manner, the three valve holes are arranged at intervals, and connecting lines of circle centers of the three circulation holes form an isosceles triangle; the isosceles triangle comprises a first inner angle A, a second inner angle B and a third inner angle F, wherein the angle B is equal to or less than the angle F, and the angle B is equal to or more than 18 degrees and is equal to or less than 22 degrees; a sliding portion slidably disposed within the valve chamber.

Furthermore, the distance between two adjacent circulation holes is L1, and L1 is more than or equal to 0.4 mm.

Further, the circulation hole comprises a first hole section and a second hole section which are communicated with each other, the diameter of the first hole section is larger than that of the second hole section, the diameter of the second hole section is larger than that of the valve hole, the second hole section is communicated with the valve hole, and the first hole section is used for connecting the pipe.

Furthermore, the diameter of the valve hole is D1, D1 is more than or equal to 0.7mm and less than or equal to 1.0mm, the center distance between every two adjacent valve holes is L2, and L2 is more than or equal to 1.5mm and less than or equal to 2.0 mm.

Furthermore, the diameter of the first hole section is D2, D2 is more than or equal to 2.4mm and less than or equal to 2.6mm, and the diameter of the second hole section is D3, and D3 is more than or equal to 2.0 mm.

Further, the mounting hole includes spacing hole section and the guiding hole section of intercommunication each other, and spacing hole section communicates with the valve pocket, and the lateral wall of disk seat and the spacing cooperation of the inner wall of spacing hole section, the radial dimension of guiding hole section is crescent in spacing hole section axial towards the guiding hole section.

Furthermore, the axes of the three valve holes and the three circulation holes are all arranged in parallel, the centers of circles of the projections of the three valve holes are all located on a first straight line on a projection plane in the radial direction of the valve holes, the centers of circles of the projections of the three circulation holes are respectively an E point, an S point and a C point, wherein the SEC is equal to the ECS and the E point and the C point are both on a second straight line.

Further, the first straight line and the second straight line are arranged in parallel, and the first straight line is positioned between the second straight line and the point F; or the first straight line and the second straight line are superposed; or the first straight line and the second straight line are arranged in a crossing manner.

According to another aspect of the present invention, there is provided a four-way valve comprising a main valve and a pilot valve as described above.

Furthermore, the main valve comprises a main valve body, a D connecting pipe, an E connecting pipe, an S connecting pipe and a C connecting pipe which are fixedly connected with the main valve body, and the four-way valve further comprises four capillary tubes, wherein one ends of the four capillary tubes are connected with the pilot valve, and the other ends of the four capillary tubes are respectively connected with the D connecting pipe, the S connecting pipe and two ends of the main valve body.

The technical scheme of the utility model provides a pilot valve, which comprises: the valve body is provided with a valve cavity, and the side wall of the valve body is provided with a mounting hole communicated with the valve cavity; the valve seat is arranged in the mounting hole and is provided with a valve hole and a circulation hole which are communicated with each other, the valve hole is communicated with the valve cavity, and the circulation hole is used for connecting a pipe; the three valve holes are communicated with the three circulation holes in a one-to-one correspondence manner, the three valve holes are arranged at intervals, and connecting lines of circle centers of the three circulation holes form an isosceles triangle; the isosceles triangle comprises a first inner angle A, a second inner angle B and a third inner angle F, wherein the angle B is equal to or less than the angle F, and the angle B is equal to or more than 18 degrees and is equal to or less than 22 degrees; a sliding portion slidably disposed within the valve chamber. By adopting the scheme, the connection lines of the circle centers of the three circulation holes form an isosceles triangle, so that the circulation areas between the two circulation holes for reversing and the valve hole are ensured to be the same, and the flow and the speed of the fluid flowing into different circulation holes are ensured to be the same when the pilot valve reverses. The second inner angle B and the third inner angle F of the isosceles triangle are equal and are both located between 18 degrees and 22 degrees, and the isosceles triangle is arranged, so that the process requirement of the butt joint pipe butted with the circulation hole is guaranteed, the circulation area of flow between the valve hole and the circulation hole is increased, if the angle value of the angle B and the angle F is greater than 22 degrees, the circulation area between the circulation hole and the valve hole is reduced, the product flow is reduced, the product reversing is influenced, if the angle value of the angle B and the angle F is less than 18 degrees, the unilateral distance L1 between the butt joint pipes butted on two adjacent circulation holes is reduced, the butt joint pipe is easy to damage in the processing process, the product performance is influenced, the stability of the pilot valve is ensured, and the product performance of the pilot valve is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 illustrates a schematic structural diagram of a pilot valve provided by an embodiment of the utility model;

FIG. 2 shows a schematic of the structure of a valve seat in the pilot valve of FIG. 1;

FIG. 3 shows a schematic view of the interior angle of the valve seat of FIG. 2;

FIG. 4 shows a rear view of the valve seat of FIG. 2;

FIG. 5 shows a cross-sectional view of the valve seat of FIG. 2;

FIG. 6 illustrates a schematic structural view of a valve body in the pilot valve of FIG. 1;

FIG. 7 shows a schematic of the first and second linear spacings in the valve seat of FIG. 5;

FIG. 8 shows a schematic view of the first and second lines in the valve seat of FIG. 5 coinciding;

FIG. 9 is a schematic diagram of a four-way valve according to another embodiment of the present invention;

FIG. 10 shows a side view of the four-way valve of FIG. 9.

Wherein the figures include the following reference numerals:

10. a valve body; 11. a valve cavity; 12. mounting holes; 121. a limiting hole section; 122. a pilot hole segment; 20. a valve seat; 21. a valve bore; 22. a flow-through hole; 221. a first bore section; 222. a second bore section; 23. a pipe connecting hole; 30. a sliding part; 41. a first straight line; 42. a second straight line; 50. a main valve; 51. a main valve body; 60. a capillary tube.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 8, an embodiment of the present invention provides a pilot valve, including: the valve comprises a valve body 10, wherein the valve body 10 is provided with a valve cavity 11, and the side wall of the valve body 10 is provided with a mounting hole 12 communicated with the valve cavity 11; the valve seat 20, the valve seat 20 is set up in the mounting hole 12, the valve seat 20 has valve hole 21 and circulation hole 22 communicating with each other, the valve hole 21 communicates with valve chamber 11, the circulation hole 22 is used for taking over; the number of the valve holes 21 and the number of the circulation holes 22 are three, the three valve holes 21 are communicated with the three circulation holes 22 in a one-to-one correspondence manner, the three valve holes 21 are arranged at intervals, and the connection lines of the circle centers of the three circulation holes 22 form an isosceles triangle; the isosceles triangle comprises a first inner angle A, a second inner angle B and a third inner angle F, wherein the angle B is equal to or less than the angle F, and the angle B is equal to or more than 18 degrees and is equal to or less than 22 degrees; and the sliding part 30, wherein the sliding part 30 is slidably arranged in the valve cavity 11.

In this embodiment, the connection lines of the centers of the three circulation holes 22 form an isosceles triangle, so as to ensure that the circulation areas between the two circulation holes 22 for reversing and the valve hole 21 are the same, thereby ensuring that the flow rates and speeds of the fluids flowing into different circulation holes 22 are the same when the pilot valve reverses. The second inner angle B and the third inner angle F of the isosceles triangle are equal, and are both located between 18 degrees and 22 degrees, so the arrangement is carried out, the technological requirements of the butt joint pipe butted with the circulation hole 22 are guaranteed, the circulation area between the valve hole 21 and the circulation hole 22 is maximized, if the angle values of the angle B and the angle F are greater than 22 degrees, the circulation area between the circulation hole 22 and the valve hole 21 is reduced, the product flow is reduced, the product reversing is influenced, if the angle values of the angle B and the angle F are less than 18 degrees, the unilateral distance L1 between two butt joint pipes butted on two adjacent circulation holes 22 is reduced, the butt joint pipe is easy to damage in the processing process, the product performance is influenced, the stability of the pilot valve is guaranteed, and the product performance of the pilot valve is improved.

Specifically, the axes of the three circulation holes 22 are arranged in parallel, the axes of the three valve holes 21 are also arranged in parallel, and the connecting line of the centers of the three circulation holes 22 is positioned on the projection plane perpendicular to the axes of the valve holes 21, so that the valve holes 21 and the circulation holes 22 can be conveniently machined, and the machining cost is reduced.

As shown in FIG. 2, the distance between two adjacent flow holes 22 is L1, and L1 is more than or equal to 0.4 mm. With this arrangement, when the flow hole 22 is machined, the flow hole 22 is prevented from being damaged due to the excessively close distance between two adjacent flow holes 22, and the performance of the pilot valve is improved.

As shown in fig. 2 to 5, the valve hole 21 and the circulation hole 22 are straight holes, the circulation hole 22 includes a first hole section 221 and a second hole section 222 which are communicated with each other, the diameter of the first hole section 221 is larger than that of the second hole section 222, the diameter of the second hole section 222 is larger than that of the valve hole 21, the second hole section 222 is communicated with the valve hole 21, and the first hole section 221 is used for connecting a pipe. The arrangement is that a step surface is formed between the first hole section 221 and the second hole section 222, when the valve body is butted with a butt joint pipe, the axial direction of the butt joint pipe can be limited through the step surface, the valve hole 21 is communicated with the circulation hole 22, so that fluid in the pilot valve can enter the butt joint pipe through the valve hole 21 and the circulation hole 22, and the use performance of the pilot valve is ensured.

As shown in FIG. 4, the diameter of the valve hole 21 is D1, D1 is more than or equal to 0.7mm and less than or equal to 1.0mm, the center distance between every two adjacent valve holes 21 is L2, and L2 is more than or equal to 1.5mm and less than or equal to 2.0 mm. According to the arrangement, the flow area between the valve hole 21 and the flow hole 22 is adjusted by adjusting the size of the valve hole 21, the center distance L2 is changed along with the change of the valve hole 21, when the diameter D1 of the valve hole 21 is changed from small to large, the center distance L2 is also changed along with the increase, and when the diameter D1 of the valve hole 21 is changed from large to small, the center distance L2 is also changed along with the decrease, so that a certain processing distance is ensured between two adjacent valve holes 21, and the processing reliability of the valve hole 21 is ensured.

Specifically, the diameter of the first hole section 221 is D2, 2.4 mm. ltoreq. D2. ltoreq.2.6 mm, and the diameter of the second hole section 222 is D3, 2.0 mm. ltoreq. D3. By the arrangement, the processing requirement of the butt joint pipe butted with the circulation hole 22 is ensured by limiting the size of the first hole section 221, and D3 is larger than or equal to 2mm, so that the second hole section 222 of the circulation hole 22 can be communicated with the valve hole 21, and the reliability of the pilot valve is ensured.

Specifically, the radial dimension of the interface tube interfacing with the flow opening 22 is typically 2.5mm, and the radial dimension of the second bore section 222 is slightly smaller than the outer diameter of the interface tube, thereby limiting the depth of the interface tube extending into the flow opening 22.

As shown in fig. 6, the mounting hole 12 includes a limiting hole section 121 and a guiding hole section 122 which are communicated with each other, the limiting hole section 121 is communicated with the valve cavity 11, the side wall of the valve seat 20 is in limiting fit with the inner wall of the limiting hole section 121, and the radial dimension of the guiding hole section 122 is gradually increased in the axial direction of the limiting hole section 121 toward the guiding hole section 122. By the arrangement, the guide hole section 122 can guide the valve seat 20 in the installation process of the valve seat 20, so that the valve seat 20 is prevented from being installed in a deviation manner, and the stability of the pilot valve is ensured.

Specifically, the axes of the three valve holes 21 and the three circulation holes 22 are all arranged in parallel, the centers of the projections of the three valve holes 21 are all located on a first straight line 41 on a projection plane in the radial direction of the valve holes 21, and the centers of the projections of the three circulation holes 22 are points E, S and C, respectively, wherein the point E and the point C are both on a second straight line 42.

In this embodiment, the three valve holes 21 are arranged on the first straight line 41 at intervals, the connecting lines of the centers of the projected circles of the three circulation holes 22 form an isosceles triangle, and the points E and C are both arranged on the second straight line 42, so that the positional relationship between the three circulation holes 22 and the three corresponding valve holes 21 can be conveniently adjusted without damaging the isosceles triangle, and the circulation area between the circulation holes 22 and the valve holes 21 can be increased.

As shown in fig. 7 and 8, the first straight line 41 and the second straight line 42 are arranged in parallel, and the first straight line 41 is located between the second straight line 42 and the point S; or the first straight line 41 and the second straight line 42 are arranged in a superposition way; or the first straight line 41 and the second straight line 42 are arranged to intersect.

Set up like this, can be through adjusting the position relation between first straight line 41 and the second straight line 42, under the prerequisite of guaranteeing that the angle requires that the line of the projected centre of a circle of angle B is less than or equal to 22 and three valve opening 21 to be less than or equal to 18, realize opening 22 and set up the diversification of position, under the prerequisite of guaranteeing that flow area does not influence the switching-over, guarantee that the pilot valve has multiple opening 22's the mode of setting, can be applicable to different processing environment.

As shown in fig. 7, the first straight line 41 and the second straight line 42 are arranged in parallel, so that the flow area between the valve hole 21 and the flow hole 22 is increased more easily, and the performance of the pilot valve is improved.

As shown in fig. 8, the first straight line 41 and the second straight line 42 are arranged to coincide with each other, so that the position of the valve hole 21 is easily determined to determine the flow hole 22, and the process is easy and reliable.

In the embodiment not shown in the drawings, the first straight line 41 and the second straight line 42 are arranged in a crossed manner, so that the flow hole 22 of the pilot valve can be arranged in more ways on the premise of ensuring that the flow area between the valve hole 21 and the flow hole 22 does not influence the reversing, and the pilot valve can be suitable for different environmental working conditions.

As shown in fig. 9 and 10, another embodiment of the present invention provides a four-way valve including a main valve 50 and the above-described pilot valve.

In this embodiment, constitute isosceles triangle through the line that makes the centre of a circle of three opening 22 in the pilot valve, flow into the fluidic flow and the speed in different opening 22 when guaranteeing the pilot valve switching-over is the same, isosceles triangle's second interior angle B and third interior angle F equal, and all be located 18 between to 22, set up like this, when having guaranteed the technological requirement with the capillary of opening 22 butt joint, make flow area's maximize between valve opening 21 and the opening 22, when having guaranteed the stability of cross valve, the product property ability of cross valve has been improved.

Specifically, the main valve 50 includes a main valve body 51, and a D connection pipe, an E connection pipe, an S connection pipe, and a C connection pipe fixedly connected to the main valve body 51, and the four-way valve further includes four capillary tubes 60, each of the four capillary tubes 60 has one end connected to the pilot valve, and the other end connected to the D connection pipe, the S connection pipe, and two ends of the main valve body 51. The pilot valve is connected with the main valve 50 through a capillary tube 60, and the main valve 50 is adjusted by adjusting the pilot valve, so that the main valve 50 is reversed, and the operation is simple and convenient.

Specifically, the above-mentioned butt joint pipe communicating with the pilot valve flow hole 22 is the capillary tube 60.

In this embodiment, the valve seat 20 of the pilot valve further has a pipe connecting hole 23, three flow holes 22 on the valve seat 20 are an E flow hole, an S flow hole and a C flow hole, respectively, the circle center of the E flow hole is an E point, the circle center of the S flow hole is an S point, the circle center of the C flow hole is a C point, the capillary tube 60 includes a D capillary tube, an S capillary tube and two long capillary tubes, one end of the D capillary tube is connected with the D pipe connecting pipe, and the other end is connected with the pipe connecting hole 23 on the valve seat 20 of the pilot valve; one end of the capillary tube S is connected with the connecting tube S, and the other end of the capillary tube S is communicated with an S circulation hole on the pilot valve seat 20; one end of each of the two long capillaries is connected to the E flow hole and the C flow hole, and the other end is connected to both ends of the main valve body 51.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pilot valve, comprising:

the valve body (10), the valve body (10) has a valve cavity (11), and the side wall of the valve body (10) is provided with a mounting hole (12) communicated with the valve cavity (11);

a valve seat (20), wherein the valve seat (20) is arranged in the mounting hole (12), the valve seat (20) is provided with a valve hole (21) and a through hole (22) which are communicated with each other, the valve hole (21) is communicated with the valve cavity (11), and the through hole (22) is used for connecting a pipe; the number of the valve holes (21) is three, the three valve holes (21) are communicated with the three circulation holes (22) in a one-to-one correspondence manner, the three valve holes (21) are arranged at intervals, and connecting lines of circle centers of the three circulation holes (22) form an isosceles triangle;

the isosceles triangle comprises a first inner angle A, a second inner angle B and a third inner angle F, wherein the angle B is equal to the angle F, and the angle B is more than or equal to 18 degrees and less than or equal to 22 degrees;

a sliding portion (30), the sliding portion (30) being slidably disposed within the valve cavity (11).

2. A pilot valve as claimed in claim 1,

the distance between two adjacent circulation holes (22) is L1, and L1 is more than or equal to 0.4 mm.

3. A pilot valve as claimed in claim 1,

the valve hole (21) and the circulation hole (22) are straight holes, the circulation hole (22) comprises a first hole section (221) and a second hole section (222) which are communicated with each other, the diameter of the first hole section (221) is larger than that of the second hole section (222), the diameter of the second hole section (222) is larger than that of the valve hole (21), the second hole section (222) is communicated with the valve hole (21), and the first hole section (221) is used for connecting a pipe.

4. A pilot valve as claimed in claim 1,

the diameter of each valve hole (21) is D1, D1 is more than or equal to 0.7mm and less than or equal to 1.0mm, the center distance between every two adjacent valve holes (21) is L2, and L2 is more than or equal to 1.5mm and less than or equal to 2.0 mm.

5. A pilot valve as claimed in claim 3,

the diameter of the first hole section (221) is D2, D2 is more than or equal to 2.4mm and less than or equal to 2.6mm, and the diameter of the second hole section (222) is D3, D3 is more than or equal to 2.0 mm.

6. A pilot valve as claimed in claim 1,

the mounting hole (12) comprises a limiting hole section (121) and a guide hole section (122) which are communicated with each other, the limiting hole section (121) is communicated with the valve cavity (11), the side wall of the valve seat (20) is in limiting fit with the inner wall of the limiting hole section (121), and the radial size of the guide hole section (122) is gradually increased towards the axial direction of the guide hole section (122) from the limiting hole section (121).

7. A pilot valve as claimed in claim 1,

the axes of the three valve holes (21) and the three circulation holes (22) are all arranged in parallel, the centers of circles of the projections of the three valve holes (21) are all located on a first straight line (41) on a radial projection plane of the valve holes (21), the centers of circles of the projections of the three circulation holes (22) are respectively a point E, a point S and a point C, wherein the point E and the point C are both on a second straight line (42).

8. A pilot valve according to claim 7, characterised in that said first line (41) and said second line (42) are arranged in parallel and that said first line (41) is located between said second line (42) and a point S; or the first straight line (41) and the second straight line (42) are arranged in a superposition manner; or the first straight line (41) and the second straight line (42) are arranged crosswise.

9. A four-way valve, characterized in that it comprises a main valve (50) and a pilot valve according to any of claims 1-8.

10. The four-way valve according to claim 9, wherein the main valve (50) comprises a main valve body (51), and a D connection pipe, an E connection pipe, an S connection pipe and a C connection pipe fixedly connected to the main valve body (51), and the four-way valve further comprises four capillary tubes (60), and each of the four capillary tubes (60) has one end connected to the pilot valve and the other end connected to the D connection pipe, the S connection pipe and both ends of the main valve body (51).