CN210920262U - Pilot valve and four-way reversing valve - Google Patents

Abstract

The utility model provides a pilot valve and four-way reversing valve, this pilot valve includes: the valve body is integrally stretched to form a cylinder with one open end and the other closed end, the closed end is defined as a first end, the open end is defined as a second end, the first end of the valve body is provided with an inlet, a cavity is formed in the valve body, and the inlet is communicated with the cavity; the inlet pipe is connected with the first end of the valve body, and the pipe orifice of the inlet pipe is communicated with the inlet; and the limiting structure is arranged between the first end of the valve body and the inlet pipe and is used for limiting the relative position of the inlet pipe relative to the valve body. Through the technical scheme provided by the application, the problems of complex structure and high cost in the prior art can be solved.

Description

Pilot valve and four-way reversing valve

Technical Field

The utility model relates to a four-way reversing valve technical field particularly, relates to a pilot valve and four-way reversing valve.

Background

Generally, the pilot valve includes a valve body, an end cap disposed at one end of the valve body, and an inlet tube disposed through the end cap to communicate the inlet tube with the valve body.

However, in the prior art, the end cover is a separately arranged part, so that the number of parts of the device is large, and the end cover is arranged on the valve body in a welding manner, so that the production cost of the device is high. Therefore, the prior art has the problems of complex structure and high cost.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pilot valve and four-way reversing valve to solve the problem that the structure is complicated among the prior art, with high costs.

According to an aspect of the utility model, a pilot valve is provided, the pilot valve includes: the valve body is integrally stretched to form a cylinder with one open end and the other closed end, the closed end is defined as a first end, the open end is defined as a second end, the first end of the valve body is provided with an inlet, a cavity is formed in the valve body, and the inlet is communicated with the cavity; the inlet pipe is connected with the first end of the valve body, and the pipe orifice of the inlet pipe is communicated with the inlet; and the limiting structure is arranged between the first end of the valve body and the inlet pipe and is used for limiting the relative position of the inlet pipe relative to the valve body.

Further, the mounting hole section has on the terminal surface of the first end of valve body, and the mounting hole section extends towards the inside of valve body, advances the pipe and wears to establish in the mounting hole section, and the import is located the mounting hole section, and limit structure is located the mounting hole section and advances between the pipe.

Furthermore, the mounting hole section has first end and the second end of relative setting, and the second end of mounting hole section is located inside the valve body, and the pore wall of the second end of mounting hole section is buckled in order to form the import to the axis direction of mounting hole section.

Further, the cross section size of the pipe entering close to the second end of the mounting hole section is larger than the size of the inlet, and the end part of the pipe entering is abutted against the end face of the second end of the mounting hole section to form a limiting structure.

Furthermore, the inlet pipe is provided with a first diameter expanding section, the first diameter expanding section is arranged in the mounting hole section in a penetrating mode, the pilot valve further comprises a filter screen, the filter screen is arranged in the first diameter expanding section, and the filter screen is abutted to the end face of the second end of the mounting hole section.

Furthermore, a second diameter expanding section is arranged on the inlet pipe and comprises a first section and a second section which are connected with each other, the first section is located on the outer side of the mounting hole section, the second section is arranged in the mounting hole section in a penetrating mode, the diameter of the first section is larger than that of the second section, and the diameter of the second section is smaller than the aperture of the mounting hole section.

Furthermore, the pilot valve also comprises a filter screen, and the filter screen is arranged in the first section.

Further, the pilot valve also includes a valve core assembly, the valve core assembly including: the core iron is movably arranged in the valve body; the core iron is in driving connection with the bracket; the sliding block is arranged on the bracket; the pressing piece is provided with a first end and a second end which are oppositely arranged, the first end of the pressing piece is arranged between the bracket and the core iron, and the second end of the pressing piece is abutted to the sliding block.

The valve seat is arranged on the side wall of the valve body, the first valve port, the second valve port and the third valve port are sequentially arranged on the valve seat, the inlet forms a fourth valve port, the sliding block is movably arranged on the valve seat, and the sliding block is used for controlling the communication condition of the first valve port, the third valve port and the second valve port.

According to the utility model discloses a on the other hand provides a four-way reversing valve, and four-way reversing valve includes the above-mentioned pilot valve that provides.

Use the technical scheme of the utility model, this pilot valve includes the valve body, advances pipe and limit structure. Wherein, the valve body is the open other end confined barrel of tensile formation one end as an organic whole, and the definition blind end is first end, opens the end and is the second end, and the first end of valve body is provided with the import, and the valve body is inside to have the cavity, and import and cavity intercommunication advance the pipe to be connected with the first end of valve body, and the mouth of pipe and the import intercommunication of advancing the pipe. And, set up limit structure between the first end of valve body and advancing the pipe, can utilize limit structure to restrict into the relative position of pipe relative valve body. By adopting the structure, the end cover is not required to be arranged, the parts of the device can be reduced, the structure of the device can be simplified, the cost of the device can be reduced, the process of welding the end cover can be omitted, and the cost of the device can be further reduced.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a pilot valve provided in an embodiment of the present invention;

FIG. 2 shows a schematic structural view of the valve body of FIG. 1;

FIG. 3 shows a cross-sectional view of the valve body of FIG. 1;

FIG. 4 shows a further schematic structural view of the valve body of FIG. 1;

fig. 5 shows a schematic structural diagram of a pilot valve provided in the second embodiment of the present invention;

FIG. 6 shows a schematic structural view of the valve body of FIG. 5;

FIG. 7 shows a cross-sectional view of the valve body of FIG. 5;

FIG. 8 shows a further schematic structural view of the valve body of FIG. 5;

fig. 9 shows a schematic structural view of the inlet pipe in fig. 5.

Wherein the figures include the following reference numerals:

10. a valve body; 11. an inlet; 12. a cavity; 13. a mounting hole section; 131. a first end; 132. a second end;

20. feeding a pipe; 21. a first diameter expanding section; 22. a second diameter expanding section; 221. a first stage; 222. a second stage;

30. a limiting structure; 40. a filter screen;

50. a valve core assembly; 51. a core iron; 52. a bracket; 53. a slider; 54. tabletting;

60. a valve seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 4, a pilot valve according to a first embodiment of the present invention includes a valve body 10, an inlet tube 20, and a limiting structure 30. Wherein, the valve body 10 is the open cylinder of another end confined of tensile formation one end as an organic whole, and the definition blind end is first end, opens the end and is the second end, and the first end of valve body 10 is provided with import 11, and valve body 10 is inside to have cavity 12, and import 11 and cavity 12 intercommunication, and valve body 10 is the integrated into one piece structure. By adopting the structure, an end cover is not required to be arranged, the parts of the device can be reduced, the structure of the device can be simplified, and the cost of the device can be reduced. Specifically, the inlet pipe 20 is connected to the first end of the valve body 10, and the nozzle of the inlet pipe 20 is communicated with the inlet 11, so that the refrigerant can enter the valve body 10 through the inlet pipe 20. In addition, a limiting structure 30 is disposed between the first end of the valve body 10 and the inlet pipe 20, so that the limiting structure 30 can be used to limit the relative position of the inlet pipe 20 with respect to the valve body 10, and the inlet pipe 20 is prevented from extending into the valve body 10 too long or being separated from the valve body 10.

By applying the pilot valve provided by the embodiment, the valve body 10 is integrally stretched to form the cylinder with one open end and the other closed end, so that an end cover is not required to be arranged, the parts of the device can be reduced, the structure of the device can be simplified, the cost of the device can be reduced, the process of welding the end cover can be omitted, and the cost of the device can be further reduced. In the prior art, the end cover is welded on the valve body 10, and the welding position has a leakage risk, the valve body 10 of the pilot valve in the embodiment is of an integrally formed structure, so that the leakage risk of the pilot valve does not exist, and the quality control cost in production can be reduced.

Specifically, the end face of the first end of the valve body 10 is provided with a mounting hole section 13, the mounting hole section 13 extends towards the inside of the valve body 10, and the pipe 20 is inserted into the mounting hole section 13, so that the assembly of the pipe 20 and the valve body 10 can be realized. Wherein, the inlet 11 is located in the mounting hole section 13, and the limiting structure 30 is located between the mounting hole section 13 and the inlet pipe 20, so that the limiting structure 30 can be used to limit the relative position of the inlet pipe 20 relative to the valve body 10, and the inlet pipe 20 can be communicated with the valve body 10. In this embodiment, the inlet pipe 20 is inserted into the installation hole section 13 by interference fit.

Wherein, mounting hole section 13 has relative first end 131 and the second end 132 that sets up, and the first end 131 of mounting hole section 13 is connected with the end wall of valve body 10, and the second end 132 of mounting hole section 13 is located inside the valve body 10, will advance pipe 20 and wear to establish in mounting hole section 13, can realize advancing the intercommunication of pipe 20 and valve body 10. Wherein, the hole wall of the second end 132 of the mounting hole section 13 is bent towards the axial direction of the mounting hole section 13 to form the inlet 11, and the opening of the inlet pipe 20 is communicated with the inlet 11.

Specifically, the cross-sectional dimension of the inlet pipe 20 near the second end 132 of the mounting hole section 13 is larger than the dimension of the inlet 11, and the end of the inlet pipe 20 abuts against the end surface of the second end 132 of the mounting hole section 13 to form the limiting structure 30. With the above structure, the end face of the second end 132 of the mounting hole section 13 can limit the inlet pipe 20, thereby preventing the inlet pipe 20 from extending into the valve body 10 too long. After the inlet pipe 20 is inserted into the installation hole section 13, the inlet pipe 20 may be further fixed by welding to prevent the inlet pipe 20 from being separated from the installation hole section 13.

In the present embodiment, the inlet pipe 20 is provided with a first diameter-expanding section 21, and the first diameter-expanding section 21 is provided close to the valve body 10. Specifically, the first diameter-expanding section 21 is inserted into the mounting hole section 13. The pilot valve also comprises a filter screen 40, and impurities in the refrigerant can be filtered by using the filter screen 40, so that the pilot valve is prevented from being blocked by the impurities in the refrigerant. Specifically, the filter screen 40 is disposed in the first expanded diameter section 21, and the filter screen 40 abuts against an end surface of the second end 132 of the mounting hole section 13. With the above structure, the end surface of the second end 132 of the mounting hole section 13 can limit the filter screen 40, and the filter screen 40 is prevented from being separated from the inlet pipe 20. In the prior art, the filter screen is usually disposed in the valve body 10 and not in the inlet pipe 20. In this embodiment, by press-fitting the filter screen 40 into the inlet pipe 20, the filter screen 40 is easily disassembled and assembled, and the post-maintenance is easily performed.

In this embodiment, the pilot valve further includes a valve core assembly 50, and the valve core assembly 50 includes a core iron 51, a bracket 52, a slider 53, and a presser plate 54. Wherein, the core iron 51 is movably arranged in the valve body 10, and the core iron 51 is in driving connection with the bracket 52, and the bracket 52 can be driven by the core iron 51 to move in the valve body 10. Specifically, the slider 53 is disposed on the bracket 52, and the slider 53 can move relative to the plurality of valve ports under the driving of the bracket 52, so as to control the communication condition of the plurality of valve ports. The pressing piece 54 has a first end and a second end which are oppositely arranged, the first end of the pressing piece 54 is arranged between the bracket 52 and the core iron 51, and the second end of the pressing piece 54 is abutted with the sliding block 53.

Specifically, the pilot valve further includes a valve seat 60, the valve seat 60 is disposed on a sidewall of the valve body 10, a first valve port, a second valve port and a third valve port are sequentially disposed on the valve seat 60, the inlet 11 forms a fourth valve port, the slider 53 is movably disposed on the valve seat 60, and the slider 53 is used for controlling communication between the first valve port and the second valve port and communication between the third valve port and the second valve port. When the working mode of the pilot valve needs to be switched, the core iron 51 can be controlled to move in the valve body 10, so that the core iron 51 drives the sliding block 53 to move relative to the first valve port, the second valve port and the third valve port through the bracket 52, and the switching of the working mode is realized.

As shown in fig. 5 to 9, a second embodiment of the present invention provides a pilot valve, which differs from the first embodiment in that a second diameter-expanding section 22 is provided on the inlet pipe 20, and the second diameter-expanding section 22 includes a first section 221 and a second section 222 connected to each other. Specifically, the first section 221 is located outside the installation hole section 13, the second section 222 is disposed in the installation hole section 13 in a penetrating manner, the diameter of the first section 221 is larger than that of the second section 222, and the diameter of the second section 222 is smaller than the aperture of the installation hole section 13. With the structure, after the inlet pipe 20 is inserted into the mounting hole section 13, the first section 221 can limit the inlet pipe 20, and the inlet pipe 20 is prevented from extending into the valve body 10 too long. After the second section 222 is inserted into the installation hole section 13, the inlet pipe 20 may be further fixed by welding to prevent the inlet pipe 20 from being separated from the installation hole section 13.

In this embodiment, the pilot valve further includes a filter screen 40, and the filter screen 40 is clamped in the first section 221. By adopting the structure, other limit structures do not need to be arranged on the filter screen 40, and the filter screen 40 can be clamped in the first section 221 by utilizing the difference value of the diameter sizes of the first section 221 and the second section 222, so that the filter screen 40 is prevented from being separated from the inlet pipe 20.

The embodiment of the utility model provides a third provides a four-way reversing valve, and this four-way reversing valve includes the above-mentioned pilot valve that provides.

Through the device that this embodiment provided, through setting up valve body 10 as an organic whole tensile formation one end and open the other end confined barrel, need not to set up the end cover so, can reduce the spare part of device, and then can simplify the structure of device, reduce the cost of device to can also save and carry out welded process to the end cover, can further reduce the cost of device.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary 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, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

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 (10)

1. A pilot valve, comprising:

the valve body (10) is integrally stretched to form a cylinder with one open end and the other closed end, the closed end is defined as a first end, the open end is defined as a second end, the first end of the valve body (10) is provided with an inlet (11), a cavity (12) is formed in the valve body (10), and the inlet (11) is communicated with the cavity (12);

the inlet pipe (20) is connected with the first end of the valve body (10), and the pipe orifice of the inlet pipe (20) is communicated with the inlet (11);

the limiting structure (30) is arranged between the first end of the valve body (10) and the inlet pipe (20), and the limiting structure (30) is used for limiting the relative position of the inlet pipe (20) relative to the valve body (10).

2. The pilot valve of claim 1, wherein the valve body (10) has a mounting hole section (13) on an end surface of the first end, the mounting hole section (13) extends toward an inside of the valve body (10), the inlet tube (20) is inserted into the mounting hole section (13), the inlet (11) is located in the mounting hole section (13), and the limiting structure (30) is located between the mounting hole section (13) and the inlet tube (20).

3. The pilot valve of claim 2, wherein the mounting bore section (13) has a first end (131) and a second end (132) that are disposed opposite each other, the second end (132) of the mounting bore section (13) is located inside the valve body (10), and a bore wall of the second end (132) of the mounting bore section (13) is bent toward an axial direction of the mounting bore section (13) to form the inlet (11).

4. The pilot valve of claim 3, wherein the cross-sectional dimension of the inlet tube (20) proximate the second end (132) of the mounting bore section (13) is greater than the dimension of the inlet opening (11), the end of the inlet tube (20) abutting the end face of the second end (132) of the mounting bore section (13) to form the stop formation (30).

5. The pilot valve of claim 3, wherein a first diameter-expanding section (21) is arranged on the inlet pipe (20), the first diameter-expanding section (21) is arranged in the mounting hole section (13) in a penetrating manner, the pilot valve further comprises a filter screen (40), the filter screen (40) is arranged in the first diameter-expanding section (21), and the filter screen (40) abuts against the end face of the second end (132) of the mounting hole section (13).

6. The pilot valve of claim 2, wherein a second diameter-expanding section (22) is arranged on the inlet pipe (20), the second diameter-expanding section (22) comprises a first section (221) and a second section (222) which are connected with each other, the first section (221) is positioned on the outer side of the mounting hole section (13), the second section (222) is arranged in the mounting hole section (13) in a penetrating mode, the diameter of the first section (221) is larger than that of the second section (222), and the diameter of the second section (222) is smaller than the hole diameter of the mounting hole section (13).

7. The pilot valve of claim 6, further comprising a filter screen (40), wherein the filter screen (40) is snapped into the first section (221).

8. The pilot valve of claim 1, further comprising a valve core assembly (50), the valve core assembly (50) comprising:

a core iron (51) movably disposed within the valve body (10);

a carriage (52), wherein the core iron (51) is in driving connection with the carriage (52);

a slider (53) provided on the bracket (52);

a pressing piece (54), wherein the pressing piece (54) is provided with a first end and a second end which are oppositely arranged, the first end of the pressing piece (54) is arranged between the bracket (52) and the core iron (51), and the second end of the pressing piece (54) is abutted to the sliding block (53).

9. The pilot valve of claim 8, further comprising a valve seat (60), wherein the valve seat (60) is disposed on a sidewall of the valve body (10), the valve seat (60) is sequentially provided with a first valve port, a second valve port and a third valve port, the inlet (11) forms a fourth valve port, the slider (53) is movably disposed on the valve seat (60), and the slider (53) is used for controlling the communication between the first valve port and the second valve port and the communication between the third valve port and the second valve port.

10. A four-way reversing valve, characterized in that it comprises a pilot valve according to any one of claims 1 to 9.

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