KR20210141756A - Pilot valve, pilot valve mounting assembly and reversing valve group - Google Patents

Abstract

A pilot valve, a pilot valve mounting assembly, and a reversing valve group are disclosed. The pilot valve 100 includes a conduit 10; pilot valve seats 20, 20a accommodated in conduit 10; a core iron assembly 30 accommodated in the conduit 10 and positioned at one side of the pilot valve seats 20 and 20a; and a bracket assembly 50 fixedly connected to the core iron assembly 30 and slidably connected to the pilot valve seats 20 and 20a. The bracket assembly 50 may reciprocate in the conduit 10 along the core iron assembly 30 . The pilot valve 100 further includes collars 40 and 40a. Collars 40 , 40a are received in conduit 10 located between pilot valve seats 20 , 20a and core iron assembly 30 . The pilot valve seats 20, 20a abut against the collars 40, 40a to determine the position of the core iron assembly 30 by the collars 40, 40a. In the pilot valve, by extending collars 40 and 40a between the core iron assembly 30 and the pilot valve seats 20 and 20a, the core iron assembly 30 and the pilot valve seats 20 and 20a directly collide. prevent it and prolong its service life.

Description

Pilot valve, pilot valve mounting assembly and reversing valve group

The present application relates to the invention of "Pilot valve core iron positioning structure and solenoid valve four-way reversing valve" of application number 201920621120.1 filed on April 25, 2019, "pilot valve and main valve" of application number 201920621137.7 filed on April 30, 2019 Claims priority to the Chinese patent application for the invention of the "guide valve of the four-way valve" of the invention of "valve fixing structure and solenoid valve four-way reversing valve", application number 201920580853.5, filed on April 25, 2019, which is hereby incorporated for reference cited in its entirety.

TECHNICAL FIELD This application relates to the field of fluid control technology, and more particularly, to a pilot valve, a pilot valve mounting assembly, and a reversing valve group.

The reversing valve group is an important component in a refrigeration system. In the reversing valve group, the reversing valve implements switching of the refrigeration system heating and cooling function through its own reversing action on the medium flow path under the control assistance action of the pilot valve. However, conventional reversing valve groups do not meet all demands of refrigeration systems in terms of many performance aspects. For example, in the reversing valve group, the production cost of the pilot valve is still relatively high and the service life is relatively short.

In consideration of this, there is a need to provide an improved pilot valve, a pilot valve mounting assembly and a reversing valve group, which has a low production cost and a long lifespan, and thus has a wide application prospect.

The present application provides a pilot valve.

These include conduits;

a pilot valve seat accommodated in the conduit;

a core iron assembly accommodated in the conduit and positioned at one side of the pilot valve seat; and

and a bracket assembly fixedly connected to the core iron assembly and slidably connected to the pilot valve seat. The bracket assembly may slide reciprocally in the conduit along the core iron assembly.

The pilot valve further includes a collar. The collar is received in the conduit located between the pilot valve seat and the core iron assembly. The pilot valve seat abuts against the collar to position the core iron assembly by the collar.

In addition, the pilot valve seat is divided into an upper half area and a lower half area in a cross section facing the core iron assembly from top to bottom. The upper half region extends along the core iron assembly and displaces the lower half region. A positioning step is formed between the shifted upper half region and the lower half region. The pilot valve seat is clamped to the collar by the positioning step.

The collar also includes a first connection part and a second connection part connected to the first connection part. An annular opening is established on the first connection portion. The positioning step abuts against the inner wall of the annular opening.

Also, the pilot valve seat has a planar cross-section toward the core iron assembly. The pilot valve seat abuts the collar by a cross-section facing the core iron assembly.

The collar also includes a first connection portion, a second connection portion and a third connection portion. The second connection part is connected between the first connection part and the third connection part. The first connecting portion, the second connecting portion and the third connecting portion define a receiving area matching the pilot valve seat. One end of the pilot valve seat is in contact with the first connection part, and the other end is in contact with the third connection part.

In addition, the first connecting portion and the third connecting portion are symmetrically distributed with respect to the second connecting portion.

The bracket assembly also includes a bracket, a slider and a spring piece. The bracket is connected to the core iron assembly. The slider is installed on the bracket. The spring piece includes a mounting portion and an abutting portion. The mounting portion is connected to the bracket, and the abutting portion abuts against the slider. A blocking piece is installed on the other side of the butt portion with respect to the slider, and the blocking piece is curved or bent to extend along an edge of the butt portion.

In addition, a connection portion for connecting the mounting portion and the butt portion is further installed on the spring piece. The connecting portion is connected obliquely between the butt portion and the mounting portion.

In addition, the blocking piece is installed perpendicular to the plane in which the butt part is located.

In addition, the blocking piece and the abutting portion are integrally molded structures.

Alternatively, the blocking piece and the butt portion are installed separately.

In addition, a pressing portion extending toward the slider and used to press the slider is installed on one side of the butt portion.

The present application further provides a pilot valve mounting assembly, which includes a first support, a second support, and any one of the pilot valves described above.

At least one first fixing part welded to the pilot valve is installed at one side of the first support. A first welding surface is installed on the other side of the first support with respect to the first fixing part, and a positioning boss is installed on the first welding surface.

At least one second fixing part welded to the reversing valve is installed at one side of the second support. In the second support, a second welding surface is installed on the other side of the second fixing part. A positioning hole through which the positioning boss passes is opened on the second welding surface.

The positioning boss is inserted into the positioning hole, and the first welding surface is welded and fixed on the second welding surface.

In addition, the positioning boss has a waist shape, and the positioning hole is a waist-shaped hole corresponding to the positioning boss.

In addition, a surface of the first fixing part welding and fixing the pilot valve is a first connection surface, and the first connection surface has an arc shape and is joined to an outer surface of a pipe wall of the pilot valve.

And/or the second fixing part has one surface for fixing the reversing valve by welding is defined as a second connection surface, and the second connection surface is connected to the outer surface of the tube wall of the reversing valve in an arc shape.

In addition, the number of the first fixing parts is three or more, and the three or more first fixing parts are divided into two groups and respectively located on opposite sides of the positioning boss.

Alternatively, the number of the second fixing parts is three or more, and the three or more second fixing parts are divided into two groups and located on opposite sides of the positioning hole, respectively.

Also, the first support includes at least one first bottom plate and at least two first connecting plates. The positioning boss is fixed on one side of the first bottom plate. The other side of the first bottom plate with respect to the positioning boss is fixedly connected to the two first connecting plates. The two first connecting plates are respectively fixed to the two first fixing parts.

In addition, the second support includes at least one second bottom plate and at least two second connecting plates. The positioning hole is opened on the second bottom plate. The two second connecting plates are fixed on the second bottom plate. The two second connecting plates are respectively fixedly connected to the two second fixing parts.

The present application further provides a reversing valve group. This includes a reversing valve and a pilot valve mounting assembly coupled to the reversing valve. The pilot valve mounting assembly is any one of the guide valve mounting assemblies described above.

The pilot valve provided in the present application serves to guide the positioning of the core iron assembly by using the inner wall of the annular opening in the collar by extending the collar between the core iron assembly and the pilot valve seat. This improves the positioning accuracy when assembling the core iron assembly. In addition, it prevents direct collision between the core iron assembly and the pilot valve seat during long-term operation, thereby performing a certain cushioning role. Therefore, it guarantees the stability of the core iron assembly positioning and extends the service life.

Hereinafter, the above and other beneficial effects of the present invention will be described in more detail.

1 is a cross-sectional structural view of a pilot valve according to a first embodiment of the present application.
FIG. 2 is a three-dimensional structural diagram of the pilot valve seat in FIG. 1 .
FIG. 3 is a structural diagram of a collar among the pilot valves in FIG. 1 .
4 is a structural diagram of a pilot valve according to a second embodiment of the present application.
FIG. 5 is a three-dimensional structural diagram of a collar among the pilot valves in FIG. 4 .
6 is a structural diagram of a pilot valve according to a third embodiment of the present application.
7 is a three-dimensional structural diagram of a spring piece of the pilot valve in FIG. 6 .
8 is a three-dimensional structural diagram showing the spring piece in FIG. 6 from another angle.
9 is a three-dimensional structural diagram of a spring piece employed in a pilot valve according to a fourth embodiment of the present application.
10 is a structural diagram of a reversing valve group provided in the present application.
11 is a structural diagram of a first support of the reversing valve group in FIG. 10 .
12 is a structural diagram of a second support of the reversing valve group in FIG. 10 .
13 is a structural diagram of a reversing valve group according to a fifth embodiment of the present application.
14 is a structural diagram of a reversing valve group according to a sixth embodiment of the present application.
In the drawing, 100 is a pilot valve, 10 is a conduit, 20 is a pilot valve seat, 20a is a pilot valve seat, 21 is a pilot valve port, 22 is a positioning step, 23 is an upper half area, 24 is a lower half area, 30 is a core iron assembly , 31 core iron, 32 aspirator, 33 elastic element, 40 collar, 40a collar, 41 first connection, 42 second connection, 41a first connection, 42a second connection, 411 annular opening, 43 a third connecting part, 44 receiving area, 50 bracket assembly, 51 bracket, 52 spring piece, 53 slider, 54 fixing seat, 521 mounting part, 522 butt part, 523 blocking piece , 524 connecting part, 525 pressing part, 52a spring piece, 523a blocking piece, 522a butt part, 60 capillary assembly, 61 E capillary, 62 S capillary, 63 C capillary, 64 D capillary, 200 is a reversing valve group, 201 is a reversing valve, 202 is a pilot valve mounting assembly, 300 is a first support, 301 is a first fixing part, 304 is a first welding surface, 303 is a positioning boss, 305 is a first Base plate, 306 is a first connecting plate, 302 is a first connecting surface, 400 is a second support, 401 is a second fixing part, 404 is a second welding surface, 403 is a positioning hole, 405 is a second bottom plate, 406 is a second connecting plate, 402 is a second connecting surface, 301a is a first fixing part, 401a is a second fixing part, 301b is a first fixing part, 401b is a second fixing part.

Hereinafter, the technical solutions of the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings of the embodiments of the present application. The described embodiments are only some, not all, of the present application. All other embodiments obtained by those skilled in the art without creative work based on the embodiments of the present application fall within the protection scope of the present application.

Note that when a component is described as being “mounted” to another component, it may be directly mounted on the other component or a component may exist in the middle. When it is described that one component is "installed" on another component, it may be directly installed on the other component, or the component may exist simultaneously in the middle. When it is described that one component is "fixed" to another component, it may be directly fixed to the other component, or the component may exist simultaneously in the middle.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the specification of the present application herein is for the purpose of describing specific embodiments, and is not intended to limit the present application. As used herein, the term “or/and” includes any and all combinations of one or more related listed items.

The present application provides a pilot valve (100). The pilot valve 100 is used to drive the opening and closing of the external control valve.

In this embodiment, the pilot valve 100 is applied to a refrigeration system. The external control valve at this time is a reversing valve in the refrigeration system. The pilot valve 100 drives the reversing valve to change its own operating state and to switch the flow direction of the refrigerant in the refrigeration system through pilot control of the reversing valve in the refrigeration system.

In another embodiment, as long as the pilot valve 100 provided in the present application can be applied to the pipeline system, it can be understood that the pilot valve 100 may be applied to a pipeline system other than a refrigeration system.

Specifically, the pilot valve 100 includes a conduit 10 , a pilot valve seat 20 , a core iron assembly 30 , a collar 40 , a bracket assembly 50 , and a capillary assembly 60 . The pilot valve seat 20 , the core iron assembly 30 , the collar 40 , and the bracket assembly 50 are all installed inside the conduit 10 . The pilot valve seat 20 and the core iron assembly 30 are installed to face each other and are fixedly connected to the conduit 10 and the capillary assembly 60 . The collar 40 is installed between the pilot valve seat 20 and the core iron assembly 30 . The bracket assembly 50 is fixedly connected to the core iron assembly 30 . The capillary assembly 60 is fixedly connected to the conduit 10 and communicates with an external reversing valve.

Conduit 10 is used to receive pilot valve seat 20 , core iron assembly 30 , collar 40 and bracket assembly 50 . The pilot valve seat 20 is used to secure the capillary assembly 60 and support some bracket assemblies 50 . The core iron assembly 30 is used to drive the bracket assembly 50 to reciprocate. The collar 40 is used to position the core iron assembly 30 and prevent direct collision between the core iron assembly 30 and the pilot valve seat 20 . The bracket assembly 50 is used to control and regulate the running state of the fluid medium in the capillary assembly 60 .

When the core iron assembly 30 is switched between the power-down state and the power loss state, the reciprocating sliding of the core iron assembly 30 within the conduit 10 causes the bracket assembly 50 to similarly slide reciprocally within the conduit 10 . can be driven to A change in the position of the bracket assembly 50 on the pilot valve seat 20 changes the distribution relationship of different capillaries within the capillary assembly 60 . Therefore, it implements the change of the flow direction of the fluid medium and the actuation of the external reversing valve state control.

In this embodiment, the conduit 10 is an annular tubular body having a round cross section, and the inside of the conduit 10 is hollow and cylindrical. The conduit 10 is made of stainless steel material. In other embodiments, the cross-section of the conduit 10 may adopt a shape other than a round annular shape, such as a square or the like. The material of the conduit 10 may use a material other than stainless steel, such as brass. This is possible as long as the shape and material of the conduit 10 do not affect the implementation of the basic function of the pilot valve 100 .

Referring to FIG. 2 together, FIG. 2 is a three-dimensional structural diagram of the pilot valve seat 20 in FIG. 1 . The pilot valve seat 20 is in contact with the inner wall of the conduit 10 and is fixedly connected to the capillary assembly 60 . A plurality of pilot valve ports 21 are opened on the pilot valve seat 20 . The pilot valve port 21 communicates the capillary in the capillary assembly 60 . When the bracket assembly 50 is constantly sliding on the surface of the pilot valve seat 20 , the bracket assembly 50 can make the different pilot valve ports 21 communicate. Accordingly, different capillaries in the capillary assembly 60 are communicated, and a control function for the fluid medium in the capillary assembly 60 is implemented.

In this embodiment, the number of pilot valve ports 21 is three. The three pilot valve ports 21 are spaced apart from each other. It is understood that in another embodiment, the number of pilot valve ports 21 can be adjusted to exceed three according to the working conditions.

The cross-section of the pilot valve seat 20 is generally semicircular, and the longitudinal cross-section is generally rectangular. In order to improve the matchability with the conduit 10 in this embodiment, the pilot valve seat 20 is also made of a stainless steel material. Of course, in another embodiment, the pilot valve seat 20 may use a material other than stainless steel, such as brass.

In this embodiment, the pilot valve seat 20 has a cross section facing the core iron assembly 30 divided into an upper half region 23 and a lower half region 24 from top to bottom. The upper half region 23 extends along the core iron assembly 30 and deviates from the lower half region 24 . A positioning step 22 is formed between the shifted upper half region 23 and the lower half region 24 .

The positioning step 22 on the pilot valve seat 20 provided in this embodiment is formed by misaligning the upper half region 23 and the lower half region 24 of the pilot valve seat 20 . Positioning step 22 to protrude directly on the inner wall of the conduit 10 or on the inner wall of the valve body (in the conventional structure, it is installed separately from the conduit 10 and is used to support the member of the capillary assembly 60) Compared with the installation method, the processing difficulty of the valve body itself can be lowered effectively. In addition, the processing of the positioning step 22 may directly depend on the processing of the pilot valve seat 20, for example, a process such as stamping molding may be adopted, which is not only convenient but also improves processing efficiency. .

The core iron assembly 30 includes a core iron 31 , a suction element 32 and an elastic element 33 . The core iron 31 abuts against the inner wall of the conduit 10 and is connected to the bracket assembly 50 . One end of the elastic element 33 abuts against the suction element 32 , and the other end abuts against the core iron 31 .

When the sucker 32 is in the energized state, the sucker 32 attracts the core iron 31 through its own magnetic force to overcome the resistance of the elastic element 33 and move toward the sucker 32 . can At this time, the core iron 31 simultaneously drives the bracket assembly 50 to move toward the sucker 32 , and the bracket assembly 50 slides on the pilot valve seat 20 in a direction adjacent to the sucker 32 . appears to be

When the sucker 32 is in a power loss state, the springback of the elastic element 33 after being pressured may drive the core iron 31 to move away from the sucker 32 . . At this time, the core iron 31 simultaneously drives the bracket assembly 50 to move in a direction away from the suction device 32 , and the bracket assembly 50 moves on the pilot valve seat 20 in a direction away from the suction device 32 . appears to be sliding.

In this embodiment, the elastic element 33 is a spring. In other embodiments, the elastic element 33 may be an element other than a spring, such as an elastic sphere.

Referring to FIG. 3 together, FIG. 3 is a structural diagram of the collar 40 of the pilot valve 100 in FIG. 1 . The collar 40 is received in the portion between the pilot valve seat 20 and the core iron assembly 30 in the conduit 10 . The collar 40 includes a first connecting portion 41 and a second connecting portion 42 connected to each other.

The first connecting portion 41 is an annular body whose body is annular in cross section. The first connection part 41 and the inner wall of the conduit 10 are fixed to each other by welding or the like. An annular opening 411 with a hollow is opened in the middle of the first connecting portion 41, and the first connecting portion 41 is equally divided into an upper annular region and a lower annular region along the horizontal direction.

In this embodiment, the lower annular region of the first connecting portion 41 is clamped and fixed with the outer edge of the positioning step 22, and the upper half region 23 in which the pilot valve seat 20 is displaced is formed by the annular opening of the annular body. (411) is penetrated in. This is similar to the structure of snap rings and annular snap blocks.

The first connecting portion 41 is a round annular shape in this embodiment. As long as it does not affect the assembly between the first connecting portion 41 and the pilot valve seat 20 and the positioning step 22, the first connecting portion 41 may have other shapes, such as a square annular shape.

In this embodiment, the second connecting portion 42 is a cylinder whose body is semi-cylindrical. The second connection part 42 is installed to directly face the top of the pilot valve seat 20 , and may be fixed on the pipe wall of the conduit 10 by welding or the like. Therefore, the overall stability can be improved. The second connection portion 42 is fixed to the upper annular region of the first connection portion 41 , and is located on one side relatively far from the core iron assembly 30 .

In this embodiment, the connection method between the first connection part 41 and the second connection part 42 may be integral stamping molding or a separate welding fixing method. As long as it does not affect the assembly between the collar 40 and the positioning step 22, other connection methods may be used.

When assembling, the pilot valve seat 20 having the positioning step 22 is mounted in the conduit 10 first, and then the collar 40 and the positioning step 22 are assembled. Then, after making the lower annular region of the first connecting portion 41 contact the outer edge of the positioning step 22 , the upper half region 23 of the pilot valve seat 20 is connected to the annular opening of the first connecting portion 41 . (411) is passed through. Through this, clamping and fixing of the first connecting portion 41 and the positioning step 22 is completed. After that, between the collar 40 and the conduit 10 is fixed together by welding or the like, and then subsequent assembly between each other member is performed.

The bracket assembly 50 is secured on the core iron assembly 30 and extends generally along the axial direction of the conduit 10 to the point of the pilot valve seat 20 . The bracket assembly 50 includes a bracket 51 , a spring piece 52 , a slider 53 , and a fixing seat 54 . One end of the bracket 51 is fixedly connected to the core iron 31 , and both the slider 53 and the fixed seat 54 are installed to cover the bracket 51 and are fixedly connected. One end of the spring piece 52 is sandwiched between the bracket 51 and the fixed seat 54 , and the other end is in contact with the surface of the slider 53 under the pressing action of the fixed seat 54 . This presses the slider 53 onto the surface of the pilot valve seat 20 .

The reciprocating sliding of the core iron 31 in the conduit 10 may drive the slider 53 to slide on the pilot valve seat 20 via the bracket 51 . When the slider 53 slides on the pilot valve seat 20 , the apertures outlined on the slider 53 can communicate different capillaries in the capillary assembly 60 .

In this embodiment, the slider 53 is a sliding bowl with the opening facing down. In another embodiment, as long as the slider 53 can realize communication between different capillaries, it can be understood that the slider 53 may use a structure other than that shown.

Capillary assembly 60 includes four capillaries, each of which is an E capillary 61 , an S capillary 62 , a C capillary 63 and a D capillary 64 . Correspondingly, on the pilot valve seat 20, an E capillary tube 61, an S capillary tube 62, and a C capillary tube 63 are opened, respectively, corresponding to the E capillary interface, the S capillary interface, and the C capillary interface, respectively. The D capillary 64 is insertedly connected to one end distal from the core iron assembly 30 in the conduit 10 and communicated with the conduit 10 to better match the D capillary 64 to the tubular shape of the conduit 10 .

It can be understood that the present application does not limit the specific quantity of the capillary, and the specific quantity of the capillary may be selected according to the actual production demand.

The pilot valve 100 pushes the resilient element 33 so that the core iron 31 slides toward the positioning step 22 and collides with the collar 40 when the suction element 32 is powered off. At this time, the first connecting portion 41 in the collar 40 generates a certain cushioning action against the core iron 31 , and prevents the core iron 31 and the positioning step 22 from being damaged by direct contact. At the same time, the core iron 31 pushes the bracket 51 and the slider 53 to slide toward the positioning step 22 to communicate the E capillary 61 and the S capillary 62, and the C capillary 63 and D capillary (64) are communicated.

When the suction element 32 is energized, the pilot valve 100 sucks the core iron 31 so that the core iron 31 slides away from the positioning step 22, so that the first connection part of the collar 40 is energized. (41) and the core iron (31) are separated. The core iron 31 drives the bracket 51 and the slider 53 to slide away from the positioning step 22 to communicate the S capillary 62 and the C capillary 63, and the E capillary 61 ) and D capillary (64) are connected.

The pilot valve 100 provided in the first embodiment of the present application accommodates the pilot valve seat 20 and the core iron assembly 30 in the same conduit 10, thereby reducing the volume of the entire facility and reducing the processing difficulty and lowered production cost. At the same time, the problem of relatively poor sealing properties between the valve body and the conduit in the conventional pilot valve was also prevented.

In addition, the positioning step 22 was installed on the pilot valve seat 20 to effectively lower the machining difficulty. Also, by extending the collar 40 between the core iron assembly 30 and the pilot valve seat 20, the inner wall of the annular opening 411 in the collar 40 is used to guide the positioning of the core iron assembly 30. played a role. Through this, the accuracy of positioning when assembling the core iron assembly 30 was improved. In addition, a certain cushioning role was performed by preventing the core iron assembly 30 and the pilot valve seat 20 from directly collided in the long-term working process. Therefore, the stability of positioning of the core iron assembly 30 is ensured and the service life is extended.

4 and 5 together, FIG. 4 is a structural diagram of a pilot valve 100 according to a second embodiment of the present application, and FIG. 5 is a three-dimensional structural diagram of the collar 40a of the pilot valve 100 in FIG. am.

The difference between the second embodiment of the present application and the first embodiment of the present application is that the pilot valve seat 20a and the collar 40a of the second embodiment of the present application are the pilot valve seat 20 according to the first embodiment of the present application and It is different from the collar (40).

The pilot valve seat 20a according to the second embodiment of the present application synchronously extends in the upper half region 23 and the lower half region 24 facing the cross section of the core iron assembly 30 . Further, the extension lengths of the upper half region 23 and the lower half region 24 of the pilot valve seat 20a are the same. That is, the positioning step 22 no longer exists in the pilot valve seat 20a, and the cross section from the pilot valve seat 20a toward the core iron assembly 30 is flat. At this time, the pilot valve seat 20a abuts against the collar 40a at the same time through the upper half region 23 and the lower half region 24 (ie, the cross section facing the core iron assembly 30 ).

In addition, one third connecting portion 43 was further added in the collar 40a. The third connecting portion 43 is an annular having a round cross-section and is an annular body substantially matching the first connecting portion 41a. The third connection part 43 is fixed to one side far from the first connection part 41a in the second connection part 42a.

In this embodiment, the third connecting portion 43 is a round annular shape, may be a square annular shape. The third connection 43 may have other shapes as long as it does not affect the assembly between itself and the pilot valve 20a. Preferably, the shapes and dimensions of the third connecting portion 43 and the first connecting portion 41a are maintained to match.

The first connecting portion 41a, the second connecting portion 42a and the third connecting portion 43 are connected to each other and form a receiving area 44 matching the pilot valve seat 20a. In this case, the collar 40a has a double-sided symmetrical structure as a whole, and the stability is higher. The receiving area 44 configured by connecting the first connecting portion 41a, the second connecting portion 42a, and the third connecting portion 43 is better matched with the pilot valve seat 20a of the second embodiment of the present application, so that the pilot It prevents relative sliding between the valve seat 20a and the collar 40a from occurring.

In this embodiment, the connection method between the first connection part 41a, the second connection part 42a, and the third connection part 43 may be integral stamping molding or a separate welding fixing method. Other connection methods may be used as long as they do not affect the assembly between the collar 40a and the pilot valve seat 20a.

The pilot valve 100 provided in the second embodiment of the present application is a core iron assembly ( 30) is located. Similarly, by using the positioning function of the collar 40a, it is not necessary to install the boss so as to protrude on the inner wall of the valve body or the conduit 10, thereby effectively lowering the processing difficulty of the pilot valve 100.

In addition, the symmetrical structure of the collar 40a further improves the connection stability of the pilot valve seat 20a within the collar 40a and extends the service life.

6 to 8 together, FIG. 6 is a structural diagram of a pilot valve 100 according to a third embodiment of the present application. 7 is a three-dimensional structural diagram of the spring piece 52 of the pilot valve 100 in FIG. 6 , and FIG. 8 is a three-dimensional structural diagram showing the spring piece 52 in FIG. 6 from a different angle.

The spring piece 52 used in the third embodiment of the present application was applied only to the pilot valve 100 shown in FIG. 6 of the present application, but the spring piece 52 provided in the third embodiment of the present application is It can be understood that the same can be applied to the first embodiment ( FIG. 1 ) and the second embodiment ( FIG. 4 ) of the application.

The spring piece 52 includes a mounting portion 521 and a butt portion 522 . The mounting portion 521 is connected to the bracket 51 , and one side of the butt portion 522 is in contact with the top of the slider 53 and presses the slider 53 . The spring piece 52 has a certain elasticity, and by preventing the slider 53 from sliding along the axial direction of the mounting hole from leaving the mounting hole, the normal operation of the pilot valve 100 can be ensured.

Comprehensively considering the action and economical effectiveness of the spring piece 52, the material of the spring piece 52 generally selects a metal having relatively excellent elastic performance. By forming the thin-walled spring piece 52 through simple stamping and bending, it is possible to satisfy the slider pressing requirement of the spring piece 52 to prevent the slider from leaving the bracket. It can also reduce costs and improve economic efficiency.

The butt portion 522 is further provided with a blocking piece 523 on the side facing the slider 53 . If the pressure of the medium flowing in the conduit is excessively large, the medium may hit the slider 53 . When the force that the medium collides with the slider 53 is greater than the force that the spring piece 52 presses on the slider 53 , the slider 53 moves the spring piece 52 toward the inner wall of the conduit 10 . drive As the force that the medium acts on the slider 53 increases, the blocking piece 523 on the spring piece 52 may come into contact with the inner wall of the conduit 10, limiting the further movement of the spring piece 52, It is possible to prevent the slider 53 from moving further from the bracket 51 . When the spring piece 52 and the inner wall of the conduit 10 contact or collide with a relatively large force, deformation occurs in the blocking piece 523 and the spring piece 52 causes the slider 53 to separate from the bracket 51 . The purpose of limiting it may be lost. Accordingly, the blocking piece 523 is curved or bent and extended along the edge of the butt portion 522 . Since the blocking piece 523 has a curved or bent-extended structure, its structural rigidity is higher than that of a flat thin-walled structure. When the blocking piece 523 and the inner wall of the conduit 10 collide, the deformation of the blocking piece 523 can be effectively reduced.

In the present embodiment, there is an arc-shaped section in the edge portion of the butt portion 522, the blocking piece 523 is curvedly extended along the edge portion of the abutment portion 522. Accordingly, a semi-enclosed structure is formed with respect to the abutting portion 522 , and further, the strength of the blocking piece 523 is strengthened. Also, when the spring piece 52 receives a relatively large impact force, the blocking piece 523 is prevented from being bent due to collision between the blocking piece 523 and the inner wall of the conduit 10 . This helps the spring piece 52 to press the slider 53 better and ensures the normal operation of the pilot valve 100 .

In this embodiment, the blocking piece 523 is curved and extended along three edges adjacent to the butt portion 522 to form the blocking piece 523 having a semi-enclosed structure. In another embodiment, the blocking piece 523 may be a semi-enclosed structure formed by curvedly extending along two edges adjacent to the butt portion 522 or a full enveloping structure formed with respect to the abutment portion 522 . By providing the blocking piece 523 extending in a curved manner, the rigidity of the impact deformation resistance of the blocking piece 523 is strengthened to ensure that bending does not occur when the blocking piece 523 and the inner wall of the conduit 10 collide. This is specifically limited I never do that.

Also, the spring piece 52 further includes a connecting portion 524 . The connection part 524 is installed between the mounting part 521 and the butt part 522 . One end of the connection part 524 is connected to the mounting part 521 , and the other end of the connection part 524 is connected to the butt part 522 . The connecting portion 524 is obliquely connected between the mounting portion 521 and the abutting portion 522 . Accordingly, the horizontal position of the butt portion 522 is higher than the horizontal position of the mounting portion 521 .

This installation is advantageous in that the butt portion 522 is matched to press the slider 53 . Since the spring piece 52 has a certain elasticity, when the force exerted by the medium on the slider 53 is greater than the force exerted by the abutting portion 522 on the slider 53, the spring piece 52 is elastic. may cause deformation. In addition, since the obliquely installed connection part 524 is used as a deformable part, the degree of inclination may increase under the action of a force. When the force that the medium acts on the slider 53 is gradually reduced and the abutting portion 522 becomes smaller than the force acting on the slider 53, the deformed connecting portion 524 recovers its original shape. Therefore, the butt portion 522 is implemented to always press the slider 53 to reliably prevent the slider 53 from being separated from the bracket 51 .

The blocking piece 523 installed on the butt portion 522 is installed basically perpendicular to the plane on which the abutment portion 522 is located. When the medium pressure is excessively large and collides with the slider 53 , the butt portion 522 is pushed upward due to the impact force of the slider 53 . When the butt portion 522 is pushed to some extent, the blocking piece 523 and the inner wall of the conduit 10 come into contact with each other, and the plane on which the blocking piece 523 and the butt portion 522 are located is basically perpendicular. Therefore, when the inner wall of the conduit 10 applies a force to the blocking piece 523 , the blocking piece 523 is not easily bent to another angle, which is advantageous for the normal operation of the pilot valve 100 .

In this embodiment, the blocking piece 523 is an integrally formed structure in which the butt portion 522 is flanged, so that the blocking piece 523 is easy to process and advantageous for mass production. Of course, in another embodiment, the blocking piece 523 and the butt portion 522 may have a separate structure. The blocking piece 523 may be connected to the butt portion 522 with an adhesive or fixed by welding, which is not specifically limited.

In addition, the spring piece 52 is further provided with a pressing portion 525 on one side for pressing the slider 53 in the butt portion 522 , and the butt portion 522 has the slider 53 through the pressing portion 525 . pressure This is advantageous in making the butt portion 522 better apply the force to the slider 53 , and further prevents the slider 53 from disengaging from the bracket 51 .

Referring to FIG. 9 together, FIG. 9 is a three-dimensional structural diagram of the spring piece 52a used in the pilot valve 100 according to the fourth embodiment of the present application.

The difference between the structure of the spring piece 52a according to the fourth embodiment of the present application and the spring piece 52 according to the third embodiment of the present application is that the edge portions of the butt portion 522a are all straight sections. The blocking piece 523a is bent and extended along the edge portion of the abutting portion 522a, so that the strength of the blocking piece 523a can be strengthened and bending of the blocking piece 523a can be prevented.

Of course, the three edges adjacent to the butt portion 522a in the blocking piece 523a are bent and extended, but the same is not specifically limited. In another embodiment, as described above, the blocking piece 523a has a semi-enveloping structure formed with respect to the butt portion 522a, in which two edges adjacent to the abutting portion 522a are curved and extended, or the butt portion 522a). It may be a fully enveloping structure extending along the edge portion.

10 to 12 together, FIG. 10 is a structural diagram of the reversing valve group 200 provided in the present application. 11 is a structural diagram of the first support 300 of the reversing valve group 200 in FIG. 10 , and FIG. 12 is a structural diagram of the second support 400 of the reversing valve group 200 in FIG. 10 .

The reversing valve group 200 includes a reversing valve 201 and a pilot valve mounting assembly 202 mounted on the reversing valve 201 . The pilot valve mounting assembly 202 includes the pilot valve 100 , a first support 300 , and a second support 400 . The pilot valve 100 is mounted on the reversing valve 201 through the first support 300 and the second support 400 .

In the reversing valve group 200 provided in the present application, between the reversing valve 201 and the pilot valve 100 is not a conventional mechanical riveting structure. The reversing valve 201 implements a fixed connection with the pilot valve 100 through insertion matching between the first support 300 and the second support 400 . Therefore, it is possible to overcome the technical defects of the conventional reversing valve group 200, which is difficult to assemble, tends to be biased and riveted, and has a low resonance frequency.

At least one first fixing part 301 used for welding the pilot valve 100 is installed on one side of the first support 300 . A first welding surface 304 is installed on the other side of the first support 300 with respect to the first fixing part 301 , and a positioning boss 303 is installed on the first welding surface 304 .

At least one second fixing part 401 used for welding the reversing valve 201 is installed on one side of the second support 400 . A second welding surface 404 is installed on the other side of the second support 400 with respect to the second fixing part 401, and the positioning boss 303 is provided on the second welding surface 404 to pass through. A hole 403 is opened.

Here, the positioning boss 303 is inserted into the positioning hole 403 and the first welding surface 304 is welded and fixed on the second welding surface 404 . In another embodiment, the first welding surface 304 and the second welding surface 404 may be fixedly connected by laser welding. The positioning boss 303 may have a waist shape, and the positioning hole 403 may also be a waist shape hole to correspond to it.

The pilot valve mounting assembly 202 provided in the present application designs a support for the pilot valve 100 and the reversing valve 201, respectively, and then welds and fixes the corresponding support and the pilot valve 100 and the reversing valve. Realize the indirect fixation of the structure without mechanical riveting between the 201 . Therefore, it is possible to overcome the technical defects of the conventional structure, which is difficult to assemble, is prone to bias riveting, and has a low resonant frequency.

In order for the first fixing part 301 to be better joined with the outer surface of the pipe wall of the pilot valve 100 , the first fixing part 301 has one surface for fixing the pilot valve 100 by welding the first connection surface ( 302) is defined. The first connecting surface 302 is arc-shaped and is joined to the outer surface of the pipe wall of the pilot valve 100 .

In order for the second fixing part 401 to be better joined with the outer surface of the pipe wall of the reversing valve 201 , the second fixing part 401 has one surface for fixing the reversing valve 201 by welding the second connection. It is defined by face 402 . The second connecting surface 402 is arc-shaped and is joined to the outer surface of the tube wall of the reversing valve 201 .

In this embodiment, the number of the first fixing parts 301 is two, and the two first fixing parts 301 are respectively located on opposite sides of the positioning boss 303 . The number of the second fixing parts 401 is also two, and the two second fixing parts 401 are respectively located on opposite sides of the positioning hole 403 . Of course, the quantity of the first fixing part 301 may be one or more, and the quantity of the second fixing part 401 may also be one or more.

In this embodiment, the first support 300 includes the first bottom plate 305 , the two first connecting plates 306 , the two first fixing parts 301 and the positioning boss 303 . may include The positioning boss 303 is fixed on one side of the first bottom plate 305 , and two first connecting plates 306 are fixed on the opposite side of the first bottom plate 305 . The two first connecting plates 306 may be installed to face each other on the first bottom plate 305 and may respectively fix the two first fixing parts 301 .

The second support 400 may include a second bottom plate 405 , two second connecting plates 406 , two second fixing parts 401 , and the positioning hole 403 . The positioning hole 403 is opened on the second bottom plate 405 , and two second connecting plates 406 are fixed on the second bottom plate 405 . The two second connecting plates 406 may be oppositely installed on the second bottom plate 405 , and may respectively fix the two second fixing parts 401 .

In addition, in order to strengthen the structural strength of the pilot valve and the reversing valve fixing structure, both supports may adopt an integrally formed structure.

The following implementation steps may be adopted when fixing the pilot valve 100 and the reversing valve 201 .

The first support 300 and the pilot valve 100 are welded and fixed to each other through laser welding, furnace brazing, or the like.

The second support 400 and the reversing valve 201 are welded and fixed to each other through laser welding, in-furnace soldering, or the like.

The positioning boss 303 of the first support 300 is inserted into the positioning hole 403 of the second support 400 .

Again, the first welding surface 304 of the first support 300 and the second welding surface 404 of the second support 400 are connected through laser welding or the like.

Referring to FIG. 13 together, FIG. 13 is a structural diagram of a reversing valve group 200 according to a fifth embodiment of the present application.

In this embodiment, the number of the first fixing parts 301a of the first support 300 in the reversing valve group 200 is one. The first fixing part 301a corresponds to two first fixing parts 301 extending to face each other and forming an integral body in FIG. 11 . In this case, the first fixing part 301a may be welded to the pilot valve 100 with a relatively large area.

Similarly, the number of the second fixing part 401a in the second support 400 is one. The second fixing part 401a corresponds to two second fixing parts 401 extending oppositely and forming an integral body in FIG. 12 . In this case, the second fixing part 401a may be welded to the pilot valve 100 with a relatively large area.

Referring to FIG. 14 together, FIG. 14 is a structural diagram of a reversing valve group 200 according to a sixth embodiment of the present application.

In this embodiment, the number of the first fixing parts 301b of the first support 300 in the reversing valve group 200 is three. The three first fixing parts 301b are divided into two groups and are respectively located on opposite sides of the positioning boss 303 .

The number of the second fixing parts 401b is also plural, and the plurality of second fixing parts 401b are divided into two groups and located on opposite sides of the positioning hole 403 , respectively.

The pilot valve mounting assembly 202 and the reversing valve group 200 having the pilot valve mounting assembly 202 provided in the present application realize a stable connection between the reversing valve 201 and the pilot valve 100 . can In addition, it is possible to overcome the technical defects of the conventional structure, which is difficult to assemble, is easy to be biased and riveted, and has a low resonant frequency, and thus has a wide application prospect.

The technical features of the above-described embodiments may be arbitrarily combined. All possible combinations of technical features according to the above-described embodiments have not been described for concise description, but all possible combinations of technical features should be regarded as within the scope described in the present invention unless there is a contradiction in the combinations of technical features.

Those skilled in the art to which the present invention pertains understand that the above examples are for explaining the present application, and do not limit the present application. Appropriate changes and modifications to the above embodiments within the spirit scope of the present application all fall within the protection scope of the present application.

Claims (18)

In the pilot valve 100,
conduit 10;
a pilot valve seat (20, 20a) accommodated in the conduit (10);
a core iron assembly 30 accommodated in the conduit 10 and positioned at one side of the pilot valve seats 20 and 20a; and
and a bracket assembly fixedly connected to the core iron assembly 30 and slidably connected to the pilot valve seats 20 and 20a, the bracket assembly 50 being disposed in the conduit 10 along the core iron assembly 30 . It can slide back and forth,
The pilot valve 100 further includes a collar 40 , 40a , the collar 40 , 40a having the conduit 10 positioned between the pilot valve seat 20 , 20a and the core iron assembly 30 . ), wherein the pilot valve seat (20, 20a) abuts against the collar (40, 40a) to determine the position of the core iron assembly (30) by the collar (40, 40a) pilot valve. According to claim 1,
The pilot valve seat 20 has a cross section facing the core iron assembly 30 divided into an upper half region 23 and a lower half region 24 from top to bottom, and the upper half region 23 is the core iron assembly 30 . is extended along and is displaced from the lower half region 24, and a positioning step 22 is formed between the displaced upper half region 23 and the lower half region 24, and the pilot valve seat 20 is A pilot valve, characterized in that it is clamped to the collar (40) by a step (22). 3. The method of claim 2,
The collar 40 includes a first connection part 41 and a second connection part 42 connected to the first connection part 41, and an annular opening 411 is opened on the first connection part 41, the The positioning step (22) abuts against the inner wall of the annular opening (411). According to claim 1,
The pilot valve seat 20a has a flat cross-section toward the core iron assembly 30, and the pilot valve seat 20a abuts against the collar 40a with a cross-section toward the core iron assembly 30. Features a pilot valve. 5. The method of claim 4,
The collar 40a includes a first connection part 41a, a second connection part 42a and a third connection part 43, and the second connection part 42a includes the first connection part 41a and the third connection part ( 43), the first connecting portion 41a, the second connecting portion 42a, and the third connecting portion 43 forming a receiving area 44 matching the pilot valve seat 20a, the pilot One end of the valve seat (20a) abuts against the first connecting portion (41a), and the other end of the valve seat (20a) abuts against the third connecting portion (43). 6. The method of claim 5,
The pilot valve, characterized in that the first connecting portion (41a) and the third connecting portion (43) are symmetrically distributed with respect to the second connecting portion (42a). According to claim 1,
The bracket assembly (50) includes a bracket (51), a slider (53), and spring pieces (52, 52a), the bracket (51) is connected to the core iron assembly (30), and the slider (53) is installed on the bracket 51 , the spring pieces 52 and 52a include a mounting portion 521 and a butt portion 522 , the mounting portion 521 is connected to the bracket 51 , and the The butt portion 522 abuts against the slider 53 , the butt portion 522 is provided with a blocking piece 523 on the other side of the slider 53 , and the blocking piece 523 is the abutment A pilot valve, characterized in that it extends curved or bent along the edge of the portion (522). 8. The method of claim 7,
A connection portion 524 for connecting the mounting portion 521 and the butt portion 522 is further installed on the spring piece 52 , and the connection portion 524 includes the butt portion 522 and the mounting portion 521 . Pilot valve, characterized in that it is connected at an angle between. 8. The method of claim 7,
The blocking piece (523) is a pilot valve, characterized in that it is installed perpendicular to the plane in which the butt portion (522) is located. 8. The method of claim 7,
the blocking piece 523 and the abutting portion 522 are integrally formed; or
The pilot valve, characterized in that the blocking piece (523) and the butt portion (522) are separately installed. 8. The method of claim 7,
A pilot valve, characterized in that a pressing part (525) extending toward the slider (53) and used to press the slider (53) is installed on one side of the butt part (522). A pilot valve mounting assembly (202) comprising:
A first support 300, a second support 400, and a pilot valve 100 according to any one of claims 1 to 11,
At least one first fixing part 301 fixed by welding to the pilot valve 100 is installed on one side of the first support 300 , and the first fixing part 301 in the first support 300 is installed. On the other side of the first welding surface 304 is installed, the positioning boss 303 is installed on the first welding surface 304,
At least one second fixing part 401 welded and fixed to the reversing valve 201 is installed on one side of the second support 400 , and the second fixing part 401 in the second support 400 . ), a second welding surface 404 is installed on the other side, and a positioning hole 403 provided for the positioning boss 303 to pass is opened on the second welding surface 404,
The positioning boss (303) is inserted into the positioning hole (403), and the first welding surface (304) is welded and fixed on the second welding surface (404). 202). 13. The method of claim 12,
The positioning boss (303) has a waist shape, and the positioning hole (403) is a waist-shaped hole corresponding to the positioning boss (303). 13. The method of claim 12,
The first fixing part 301 has a first connection surface 302 on one side surface for fixing the pilot valve 100 by welding, and the first connection surface 302 has an arc shape outside the pipe wall of the pilot valve 100 . bonded to the surface and to each other; and
As for the second fixing part 401, one surface for welding and fixing the reversing valve 201 is defined as a second connection surface 402, and the second connection surface 402 is arc-shaped and the reversing valve ( Pilot valve mounting assembly (202), characterized in that at least one of the tube wall outer surface of 201 and joined to each other. 13. The method of claim 12,
The number of the first fixing parts 301 is three or more, and the three or more first fixing parts 301 are divided into two groups and located on opposite sides of the positioning boss 303, respectively, or
The number of the second fixing parts 401 is three or more, and the three or more second fixing parts 401 are divided into two groups and are respectively located on opposite sides of the positioning hole 403. a pilot valve mounting assembly (202). 13. The method of claim 12,
The first support 300 includes at least one first bottom plate 305 and at least two first connecting plates 306 , and the positioning boss 303 is the It is fixed on one side, and the other side of the first bottom plate 305 with respect to the positioning boss 303 is fixedly connected to the two first connecting plates 306 , and the two first connecting plates 306 are fixed on one side. ) is a pilot valve mounting assembly (202), characterized in that each fixing the two first fixing parts (301). 13. The method of claim 12,
The second support 400 includes at least one second bottom plate 405 and at least two second connecting plates 406 , and the positioning hole 403 is formed on the second bottom plate 405 . The two second connecting plates 406 are fixed on the second bottom plate 405 , and the two second connecting plates 406 each have two second fixing parts 401 . Pilot valve mounting assembly (202) characterized in that the fixed connection. In the reversing valve group 200,
16 , comprising a reversing valve ( 201 ) and a pilot valve mounting assembly connected to the reversing valve, wherein the pilot valve mounting assembly is a guide valve mounting assembly ( 202 ) according to claim 1 . Reversing valve group (200) characterized.

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