Control valve

Abstract

The control valve comprises a valve body part, a switch part and a valve element part, the valve body part comprises a main valve port, the valve element part is located in an inner cavity of the valve body part, the valve element part comprises a valve element, the valve element comprises a valve element guide section and a valve element sealing section, the valve element sealing section comprises an auxiliary valve port, the switch part comprises a pin, and the pin comprises a pin guide section. The outer wall of the pin guide section is in sliding fit with the inner wall of the valve core guide section; the control valve comprises a first fluid port and a second fluid port, the valve element comprises a communication channel, the pin can open or close the auxiliary valve port, and the pin is matched with the valve element to open or close the main valve port; when the pin opens the auxiliary valve port, the second fluid port, the communication channel, the auxiliary valve port, the main valve port and the first fluid port are communicated. The control valve has the throttling function and the cut-off function, the action reliability of the valve element is high, and in addition, the invention further discloses another control valve with the same effects.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a control valve. Background Art

[0002] Fig.12 The control valve includes a valve body 01 made of a brass casting by lathe processing, and a valve core 02, a plunger 03 and a steel ball 04 fixed to the lower end of the plunger 03 are arranged inside the valve body 01, i.e., inside the control valve.

[0003] As shown in the figure, the internal structure of the control valve is complex, that is, in addition to the valve core 02, a steel ball is connected under the plunger. When the control valve enters from the second port 07 and flows out from the first port 06, the fluid flows out of the joint 06 through the valve port 08 on the valve body 01 and the gap 05 between the outer wall of the valve core 02 and the inner wall of the valve body 01. The valve core 02 needs to be guided by the inner wall of the valve body 01. If the gap 05 between the outer wall of the valve core 02 and the inner wall of the valve body 01 is too small, the valve core 02 is at risk of being stuck, and if the gap between the two is too large, it will affect the guidance of the valve body 01 to the valve core 02. Summary of the invention

[0004] An object of the present invention is to provide a control valve, which has a simple internal structure and reliable valve core movement compared to the background art.

[0005] The control valve provided by the present invention comprises a valve body component, a switch component and a valve core component, the valve body component comprises a main valve port, the valve core component is located in the inner cavity of the valve body component, the valve core component comprises a valve core, the valve core comprises a valve core guide section and a valve core sealing section, the valve core sealing section comprises an auxiliary valve port, the switch component comprises a pin, the pin comprises a pin guide section, the outer wall of the pin guide section slides with the inner wall of the valve core guide section; the control valve comprises a first fluid port and a second fluid port, the valve core comprises a connecting channel, the pin can open or close the auxiliary valve port, and the pin and the valve core can open or close the main valve port by cooperation; when the pin opens the auxiliary valve port, the second fluid port, the connecting channel, the auxiliary valve port, the main valve port and the first fluid port are connected.

[0006] The control valve structure of the above scheme has throttling function and cut-off function. On the one hand, compared with the background technology, the pin guides the valve core and can also close the auxiliary valve port. The internal structure of the control valve is simple and the valve core operation reliability is high.

[0007] The present invention also provides another control valve having the above functions, comprising a valve body component, a switch component and a valve core component, wherein the valve body component comprises a main valve port, the valve core component is located in the inner cavity of the valve body component, the valve core component comprises a valve core, the switch component comprises a pin, the pin is at least partially located in the inner cavity of the valve body component, the pin is threadedly connected to the valve body component, the pin has a first relative position and a second relative position relative to the valve body component, the valve core is sleeved with the pin, the valve core can slide relative to the pin, the valve core comprises a communication channel and a secondary valve port, and the valve body component comprises a first fluid port and a second fluid port , defining the fluid flowing in from the second fluid port as forward, and defining the fluid flowing in from the first fluid port as reverse, then: when the fluid flows in reverse and the pin is in the first relative position, the main valve port connects the first fluid port and the second fluid port; when the fluid flows in from the forward direction and the pin is in the first relative position, the second fluid port, the connecting channel, the auxiliary valve port, the main valve port, and the first fluid port are connected in sequence; when the fluid flows in from the forward direction and the pin is in the second relative position, the connecting channel is not connected to the auxiliary valve port, and the second fluid port is not connected to the first fluid port. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the control valve of the present application in the first working mode of the first embodiment;

[0009] Figure 1A Shown Figure 1 Schematic diagram of the structure of the middle valve cap, switch component and connecting sleeve;

[0010] Figure 1B Shown Figure 1 A schematic structural diagram of a housing of the control valve shown;

[0011] Figure 2 The figure shows a schematic diagram of the structure of the control valve in the second working mode shown in the first embodiment of the present application;

[0012] Figure 3 It is a schematic diagram of the structure of the control valve in the third working mode shown in the first embodiment of the present application;

[0013] Figure 4 Shown Figure 1 A three-dimensional schematic diagram of a valve core of the control valve shown;

[0014] Figure 5 Shown Figure 4 A schematic cross-sectional view of the valve core shown;

[0015] Figure 6 Shown Figure 4A structural schematic diagram of a modified example of the valve core shown;

[0016] Figure 7 Shown Figure 1 A modified example of the seat body of the control valve shown;

[0017] Figure 8 The figure shows the structure diagram of the second embodiment of the control valve of the present application;

[0018] Fig. 9 The figure shows the structure diagram of the third embodiment of the control valve of the present application;

[0019] Fig.10 FIG. 1 is a schematic structural diagram of another modified example of a valve core of a control valve;

[0020] Fig.11 The figure shows a schematic structural diagram of a third modified example of a valve core of a control valve;

[0021] Fig.12 Shown is a structural schematic diagram of a control valve in the background technology. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below with reference to the accompanying drawings.

[0023] Herein, the forward direction is defined as the fluid flowing from the second fluid port B to the first fluid port A, and the reverse direction is defined as the fluid flowing from the first fluid port A to the second fluid port B. The "longitudinal direction" mentioned below refers to the operating direction of the switch component of the control valve.

[0024] like Figure 1-3 As shown, the control valve of this embodiment includes a valve body component 1, a switch component 2 and a valve core component 3.

[0025] The valve body component 1 includes a main valve body 11 and a connecting sleeve 12. The main valve body 11 includes a shell 111 and a seat 112. The shell 111 is a tubular structure made of stainless steel material. The shell 111 is an integral structure. In this embodiment, the shell 111 can form a first fluid port A at one end thereof through a flaring process for fluid to enter or flow out, and an annular protrusion 1110 is drawn out on its side wall through a drawing hole process, and one end of the annular protrusion 1110 serves as a first interface B1. That is, the shell 111 can be processed through a stainless steel pipe.

[0026] The seat body 112 is made of a stainless steel plate by stamping. The seat body 112 is located in the shell 111. The seat body 112 is welded and fixed to the shell 111. The two can be furnace welded or laser welded. A main valve port 1120 is formed on the seat body 112. Specifically, the seat body 112 includes a circular plate portion 1121 and an annular portion 1122. The plate portion 1121 has an axial through hole, which serves as the main valve port 1120. The annular portion 1122 extends from the outer edge of the plate portion 1121 toward the first fluid port A. The outer wall of the annular portion 1122 is interference-fitted with the inner wall of the shell 111 and is welded and fixed.

[0027] like Figure 1 and Figure 1B As shown, the housing 111 includes a first straight cylinder portion 1111, a first cone ring portion 1112, a second straight cylinder portion 1113, a second cone ring portion 1114, and a third straight cylinder portion 1115. The first cone ring portion 1112 connects the first straight cylinder portion 1111 and the second straight cylinder portion 1113, the inner diameter of the first straight cylinder portion 1111 is greater than the inner diameter of the second straight cylinder portion 1113, and the inner diameter of one end of the first cone ring portion 1112 connected to the first straight cylinder portion 1111 is greater than the inner diameter of one end of the first cone ring portion 1112 connected to the second straight cylinder portion 1113. Thus, the first cone ring portion 1112 can play an axial pre-positioning role on the seat body 112 during assembly. The seat body 112 is located in the first straight cylinder portion 1111 and is welded and fixed to the first straight cylinder portion 1111.

[0028] The second cone ring portion 1114 connects the second straight tube portion 1113 and the third straight tube portion 1115. The inner diameter of the third straight tube portion 1115 is larger than the inner diameter of the second straight tube portion 1113, and the inner diameter of one end of the second cone ring portion 1114 connected to the second straight tube portion 1113 is smaller than the inner diameter of one end of the second cone ring portion 1114 connected to the third straight tube portion 1115. That is, the third straight tube portion 1115 is flared, which serves as the connection portion Z described below.

[0029] The shell 111 may be processed by stretching / expanding a stainless steel tube having the same diameter as the second straight tube portion 1113 on both sides, or by shrinking, stretching, and expanding a stainless steel tube having the same diameter as the first straight tube portion 1111, or by shrinking, stretching, and expanding a stainless steel tube having the same diameter as the third straight tube portion 1115.

[0030] In the above solution, the housing 111 and the seat 112 not only meet the lead-free material requirements, but also have a small number of parts. The seat 112 is welded inside the housing 111, and no leaking welding points of the control valve are added.

[0031] The connecting sleeve 12 is also made of stainless steel. In this embodiment, the connecting sleeve 12 is specifically a machined part. The connecting sleeve 12 is specifically cylindrical and is welded and fixed to the end of the first straight tube portion 1111 away from the first fluid port A. The two can be fixed by laser welding.

[0032] like Figure 2 As shown, the valve body component 1 also includes a joint 13. The joint 13 is also made of stainless steel material. The joint 13 is an axially through cylindrical structure. The joint 13 includes a through hole 131, and the through hole 131 is connected to the inner cavity of the housing 111. One end of the joint 13 extends from the annular protrusion 1110 into the housing 111, and the outer wall of the joint 13 is welded and fixed to the annular protrusion 1110. The end of the joint 13 away from the housing 111 forms a second fluid port B (i.e., the end of the through hole 131 away from the housing 111) for fluid to enter or flow out.

[0033] It should be noted that, in the embodiments described herein, the connector 13 may not be provided, and the first interface B1 may be directly used as the second fluid port B.

[0034] like Figure 1 As shown, the control valve further includes a first filter element 4, which is at least partially located in the annular portion 1122 of the seat body 112, and the first filter element 4 is welded and fixed to the seat body 112. The function of the first filter element 4 is to filter the fluid. The first filter element 4 is also made of stainless steel.

[0035] like Figure 1-3 As shown, the connecting sleeve 12 has internal threads and external threads, the first valve bonnet 5 of the control valve is externally mounted on the connecting sleeve 12 , the first valve bonnet 5 has internal threads, and the first valve bonnet 5 is threadedly connected to the external threads of the connecting sleeve 12 .

[0036] The switch component 2 includes a pin 21, which includes an external thread. The pin 21 is at least partially located in the connecting sleeve 12. The pin 21 is threadedly connected to the connecting sleeve 12. The pin 21 can rotate relative to the connecting sleeve 12 under the action of external force and control the longitudinal displacement of the valve in the axial direction of the connecting sleeve 12, that is, the longitudinal direction of the control valve.

[0037] like Figure 1-3As shown, the outer wall of the connecting sleeve 12 includes a first external thread section 121, a first insertion section 122 and a first radially outwardly protruding section 123. The first external thread section 121 has an external thread. The first radially outwardly protruding section 123 is located between the first external thread section 121 and the first insertion section 122. The first radially outwardly protruding section 123 radially protrudes outward relative to the root of the first external thread section 121 and the outer wall of the first insertion section 122. The first insertion section 122 is inserted into the housing 111. In the longitudinal direction of the control valve, the first radially outwardly protruding section 123 abuts against the upper end of the first straight cylinder portion 1111 of the housing 111. The outer wall of the first insertion section 122 is interference fit with the inner wall of the housing 111. The upper end of the first straight cylinder portion 1111 is welded and fixed to the connecting sleeve 12. The design of the first insertion section 122 and the first radially outwardly protruding section 123 facilitates the radial positioning and axial positioning of the connecting sleeve 12 and the housing 111.

[0038] like Figure 1 As shown, the inner wall of the connecting sleeve 12 includes a first internal thread segment 124, a first radial inward convex segment 125, and a first guide segment 126. The first internal thread segment 124 has an internal thread, and the first radial inward convex segment 125 radially protrudes inward relative to the root of the first internal thread segment 124 and the first guide segment 126. The inner diameter of the first guide segment 126 is larger than the inner diameter of the first radial inward convex segment 125, and the first guide segment 126 can guide the axial movement of the switch component 2.

[0039] The pin 21 includes a second external thread section 211, a second radially outwardly protruding section 212, a third radially outwardly protruding section 213, a seal installation section 214, and a pin guide section 215. The seal installation section 214 is cylindrical, and the seal 22 is sleeved on the seal installation section 214. The seal 22 abuts against the outer wall of the seal installation section 214 and the inner wall of the first guide section 126 of the connecting sleeve 12. The outer wall of the second radially outwardly protruding section 212 and the outer wall of the third radially outwardly protruding section 213 protrude radially outward relative to the outer wall of the seal installation section 214. In the longitudinal direction of the control valve, the second radially outwardly protruding section 212 and the third radially outwardly protruding section 213 limit the seal 22 in the axial direction. The first radially inwardly protruding section 125 of the connecting sleeve 12 cooperates with the second radially outwardly protruding section 212 of the pin 21, so that the switch component 2 will not fall out from the upper end of the connecting sleeve 12 in the longitudinal direction of the control valve. That is, the first radially inner convex section 125 has an axially upward anti-detachment effect on the switch component 2. The pin 21 is installed from the lower end of the connecting sleeve 12, and the connecting sleeve 12 does not need to be separately provided with a part to prevent the pin 21 from detaching from the connecting sleeve 12, thereby reducing the number of parts and simplifying the assembly process. Specifically in this embodiment, the cross-sections of the first radially inner convex section 125 and the second radially outer convex section 212 are both circular, and the outer diameter of the second radially outer convex section 212 is greater than the inner diameter of the first radially inner convex section 125.

[0040] The cross section of the third radial outward protrusion section 213 is also circular. The outer diameters of the second radial outward protrusion section 212 and the third radial outward protrusion section 213 may be equal or unequal. In this embodiment, as a preferred solution, the outer diameters of the two are equal to facilitate processing.

[0041] The second radial outward convex section 212, the third radial outward convex section 213 and the seal 22 are located in the connecting sleeve 12. The second radial outward convex section 212, the third radial outward convex section 213 and the seal 22 are slidably matched with the first guide section 126 of the connecting sleeve 12, and the seal 22 is dynamically sealed with the first guide section 126.

[0042] The pin guide section 215 is located at the lower side of the third radially outwardly protruding section 213. In the present embodiment, the pin guide section 215 is specifically cylindrical. Of course, the shape of the pin guide section 215 is not limited to cylindrical, as long as it can adapt to the valve core component 3 to realize its function.

[0043] The pin guide section 215 is provided with a valve core component 3. In this embodiment, the valve core component 3 is specifically a valve core 31, which is made of a non-metallic material. The valve core 31 is selected from a material with high efficiency sealing and excellent temperature resistance. The valve core 31 can be made of a polymer material such as polytetrafluoroethylene with good creep resistance. The pin 21 is made of stainless steel. The valve core 31 includes a secondary valve port 30, and the pin 21 can open or close the secondary valve port 30.

[0044] Specifically, if Figure 1-3 and Figure 4 and Figure 5 As shown, in this embodiment, the valve core 31 is cylindrical as a whole. Of course, its structure is not limited to this, as long as it can cooperate with the pin 21 to achieve its function. In this embodiment, the valve core 31 is cylindrical as a whole with an axial through hole, that is, the valve core 31 is an axial through structure, and the valve core 31 includes an axially through valve core guide section 311 and an axially through valve core sealing section 312. The flow area of ​​the valve core guide section 311 is larger than the flow area of ​​the valve core sealing section 312. In this embodiment, the valve core 31 includes a large-diameter section and a small-diameter section. The large-diameter section serves as the valve core guide section 311, and the small-diameter section serves as the valve core sealing section 312.

[0045] The cross-sections of the inner holes of the valve core guide section 311 and the valve core sealing section 312 are both circular, and the inner diameter of the valve core guide section 311 is larger than the inner diameter of the valve core sealing section 312. The portion below the valve core guide section 311 is the valve core sealing section 312. The pin guide section 215 is at least partially located in the valve core guide section 311 and can be slidably matched with the valve core guide section 311. The pin guide section 215 can guide the sliding of the valve core 31. The pin guide section is directly formed on the pin 21, which improves the reliability of the operation of the valve core 31.

[0046] In the longitudinal direction of the control valve, the projection of the outer edge of the valve core guide section 311 of the valve core 31 is located within the projection of the inner wall of the first guide section 126 of the connecting sleeve 12, so that when the control valve is in the first working mode, the valve core guide section 311 of the valve core 31 is at least partially located in the first guide section 126, which is conducive to the rational use of space and the reduction of the longitudinal size of the control valve. In addition, in the process of switching from the second working mode or the third working mode described below to the first working mode, the first guide section 126 of the connecting sleeve 12 can further guide the axial movement of the valve core 31, that is, starting from the upper end of the valve core 31 sliding into the first guide section 126, the inner side of the valve core 31 is guided by the pin guide section 215, and the outer side of the valve core 31 is also guided by the first guide section 126 of the connecting sleeve 12. The valve core 31 is well guided, and the valve core 31 does not deflect axially during its axial displacement, thereby improving the operation reliability of the valve core 31 and preventing it from getting stuck.

[0047] like Figure 4 and Figure 5 As shown, the side wall of the valve core guide section 311 includes a communication channel. When the pin 21 opens the auxiliary valve port 30, the communication channel can be communicated with the auxiliary valve port 30. Specifically, in this embodiment, the communication channel is a through hole provided on the side wall of the valve core guide section 311. The communication channel communicates with the side wall and outer wall of the large hole section 311. In this embodiment, it is specifically a radial through hole that penetrates the side wall of the valve core guide section 311. The communication channel includes a first communication channel 3111 and a second communication channel 3112. The first communication channel 3111 and the second communication channel 3112 are radially connected on the valve core guide section 311, which is convenient for processing. The valve core sealing section 312 of the valve core 31 has the aforementioned auxiliary valve port 30. The pin 21 can open or close the auxiliary valve port 30. In this embodiment, the valve core sealing section 312 is located at the lower side of the pin guide section 215. Of course, it can be understood that the lower end of the pin guide section 215 can also be directly used as the valve core sealing section. It is understandable that the communication channel may also be of other structural designs, for example, it may be Fig.10 As shown, the valve core 31A includes a valve core guide section 311A, and the inner wall of the valve core guide section 311A ​​has a groove 300, and the groove 300 extends to the upper surface of the valve core guide section 311A. In the second working mode described in this article, the first fluid port A and the second fluid port B can be connected through the groove 300, the auxiliary valve port 30 and the main valve port 1120. There is no restriction on the number and specific shape. It should be noted that in this embodiment, only one example of the valve core 31A is shown, and the groove 300 in the valve core 31A is not limited to the shape of vertically passing through the valve core guide side section 311A ​​from top to bottom as shown in the figure. It can also be a straight-through structure extending from the upper surface of the valve core 31A to the lower surface of the valve core 31A, as long as it is not connected with the auxiliary valve port and does not affect the valve core 31A and the pin 21 to close the main valve port.

[0048] Alternatively, the valve core structure is as follows Fig.11 As shown, the valve core 31B includes at least one notch, the notch passes through the inner side and the outer side of the valve core guide section 311B, and the notch extends to the upper surface of the valve core guide section 311B.

[0049] like Figure 2 As shown, the control valve further includes a second filter element 6, which is located in the valve body component 1. In this embodiment, the second filter element 6 is located in the inner cavity of the housing 111, and the second filter element 6 is welded and fixed to one end of the connector 13 close to the valve core 31. The function of the second filter element 6 is to filter the fluid entering from the second fluid port B. The second filter element 6 is also made of stainless steel.

[0050] The control valve of the present application not only has a simple internal structure, but also can realize the following three working modes:

[0051] The first working mode:

[0052] like Figure 1 , which shows a schematic diagram of the structure of the control valve of the first embodiment in the first working mode. The pin 21 is in a first relative position relative to the connecting sleeve 12, and the fluid enters from the first fluid port A. Under the action of the fluid pressure difference, the fluid flows to the main valve port 1120 and then pushes the valve core 31 open, so that the valve core 31 slides axially upward relative to the pin 21, and the valve core 31 leaves the main valve port 1120, and the first fluid port A is connected with the second fluid port B.

[0053] like Figure 1 As shown, the control valve includes a first flow channel X for fluid to flow from the first fluid port A to the main valve port 1120, and the minimum flow area of ​​the first flow channel X is greater than the flow area of ​​the main valve port 1120, so that the main valve port 1120 has a throttling function in this working mode. When the control valve is applied to an air-conditioning system, in this working mode, the control valve realizes the throttling function in the cooling state.

[0054] The second working mode:

[0055] like Figure 2 , which shows a structural schematic diagram of the control valve of the first embodiment when it is in the second working mode.

[0056] As shown in the figure, the pin 21 is in the first relative position relative to the connecting sleeve 12, and the fluid enters from the second fluid port B. The valve core 31 can slide relative to the pin 21 toward the main valve port 1120 under its own gravity and close the main valve port. At this time, the fluid can flow out in sequence through the connecting channel of the valve core 31, the interior of the valve core 31, the auxiliary valve port 30, the main valve port 1120 and the first fluid port A. When the control valve is used in an air-conditioning system, in this working mode, the control valve realizes the throttling function in the heating state.

[0057] In this mode, if Figure 4 and Figure 5 As shown, since the valve core 31 is designed with a valve core guide section 311 and a valve core sealing section 312, the minimum flow area of ​​the valve core sealing section 312 is smaller than the flow area of ​​the main valve port 1120, and the valve core sealing section 312 has a certain length in the axial direction of the valve core, then the benefit of the valve core sealing section 312 is that it is equivalent to adding a throttling line between the main valve port 1120 and the second fluid port B, which is also equivalent to extending the throttling time or extending the length of the throttling flow channel, thereby improving the heating effect when it is used in an air-conditioning system.

[0058] The third working mode:

[0059] like Figure 3 As shown in the figure, in this working mode, the control valve has a cut-off function. Specifically, as shown in the figure, compared with Figure 1 or Figure 2 The pin 21 is shown in a first relative position relative to the connecting sleeve 12. Figure 3 In the state shown, the pin 21 is in a second relative position relative to the connecting sleeve 12. The second relative position is in the first relative position state. Figure 2 In the state shown, the pin 21 is threadedly rotated relative to the connecting sleeve 12 in the direction close to the main valve port 1120, and the pin 21 is axially closed to the auxiliary valve port 30 of the valve core 31 according to the specified torque. The valve core 31 is further pressed against the seat body 112 through force transmission, so that the valve core 31 further closes the main valve port 1120, thereby improving the leakage of the control valve at the main valve port 1120, and the valve core 31 can cut off the connection between the first fluid port A and the second fluid port B.

[0060] When the main valve port 1120 needs to be opened, the pin 21 is moved upward relative to the connecting sleeve 12 , and then the valve core 31 can leave the main valve port 1120 under the action of the fluid pressure entering from the first fluid port A.

[0061] The pin 21 can not only guide the valve core 31 but also close the auxiliary valve port. Compared with the background technology, there is no need to separately connect parts for closing the auxiliary valve port, and the internal structure of the control valve is also simpler than the background technology.

[0062] like Figure 4 and Figure 5 As shown in the figure, the lower end surface of the valve core 31 abuts against the upper end surface of the seat body 112 to close the main valve port 1120. In order to further improve the sealing performance of the cooperation between the two, at least one annular groove 3121A surrounding the auxiliary valve port 30 is designed on the lower end surface of the valve core 31, that is, the end surface of the valve core sealing section 312 facing the main valve port 1120, or as shown in the figure, Figure 6 The end surface of the valve core sealing section 312 facing the main valve port 1120 is designed with at least one circle of lower annular ribs 3121B surrounding the auxiliary valve port 30, or it can also be as shown in FIG. Figure 7 As shown, an upper annular rib 1121A is designed around the main valve port 1120 and surrounds the main valve port 1120 in at least one circle toward the lower end surface of the valve core, as shown in FIG. Figure 7 As shown, the upper annular rib 1121A is provided on the plate portion 1121 of the seat body 112. The contact area between the valve core 31 and the seat body 112 is reduced by the aforementioned annular groove 3121A, or the lower annular rib 3121B or the upper annular rib 1121A, thereby increasing the sealing pressure ratio and improving the sealing effect.

[0063] It can be known from the above that the pin 21 cooperates with the valve core 31 to open or close the main valve port 1120 .

[0064] like Figure 8 As shown in FIG. 1 , it is a schematic diagram of the structure of the control valve of the second embodiment of the present application. Figure 1 The differences between the first embodiment and the second embodiment are described in detail. The same parts of the present embodiment and the first embodiment are referenced to the present embodiment using the same figure marks, and their structures are not described repeatedly.

[0065] like Figure 8 As shown, combined with Figure 1-Figure 3 The difference between this embodiment and the first embodiment mainly lies in the structural difference of the main valve body 11A. Figure 8 As shown, the main valve body 11A includes a shell and a seat body 112. The shell includes a first shell 111A and a second shell 111B. The first shell 111A and the second shell 111B are made of stainless steel and are tubular. One end of the second shell 111B is welded and fixed to the seat body 112 or the first shell 111A. Figure 8In the embodiment shown, the seat body 112 is made of a stainless steel plate by stamping, and its structure is the same as the seat body structure shown in the first embodiment. The outer wall of the annular portion 1122 of the seat body 112 is welded and fixed to the first shell 111A, and the second shell 111B is welded and fixed to the inner wall of the annular portion 1122. The first shell 111A has an annular protrusion 1110 drawn out of its side wall by a drawing hole process, one end of the annular protrusion 1110 serves as the first interface B1, one end of the connector 13 extends from the annular protrusion 1110 into the first shell 111A, and the outer wall of the connector 13 is welded and fixed to the annular protrusion 1110. One end of the second shell 111B can form a first fluid port A for fluid to enter or flow out through a flaring process, or the second shell 111B can also form the first fluid port A through a shrinking process. The other end of the second shell 111B extends into the annular portion 1122 of the seat body 112, and the seat body 112, the first shell 111A and the second shell 111B are welded and fixed. The first filter element 4 is located in the second shell 111B and is welded and fixed to the seat body 112. That is, in this embodiment, the shell is a split structure. The advantage is that, on the one hand, the processing technology of the shell is simpler than that of the shell 111 in the first embodiment.

[0066] In this embodiment, the first shell 111A, the second shell 111B, the seat body 112 and the first filter element 4 can be fixed by one-time furnace welding, or by resistance welding or laser welding.

[0067] like Fig. 9 As shown in FIG. 1 , it is a schematic diagram of the structure of the control valve of the third embodiment of the present application. Figure 1 The differences between the first embodiment and the second embodiment are described in detail. The same parts of the present embodiment and the first embodiment are referenced to the present embodiment using the same figure marks, and their structures are not described repeatedly.

[0068] like Fig. 9As shown, the difference between this embodiment and the first embodiment mainly lies in the structural difference of the main valve body. In this embodiment, the control valve includes a main valve body 11C, and the main valve body 11C includes a first shell 111C and a second shell 112C. The first shell 111C is a stainless steel pipe. The first shell 111C is drawn out of an annular protrusion 1110 on its side wall by a drawing hole process. One end of the annular protrusion 1110 serves as a first interface B1. One end of the connector 13 extends from the annular protrusion 1110 into the first shell 111C, and the outer wall of the connector 13 is welded and fixed to the annular protrusion 1110. The second shell 112C is made of a stainless steel sheet by stretching and punching, or is made of a stainless steel pipe by rolling at one end thereof to form 1122C below. The second shell 112C is an integrated structure, that is, a part. The second shell 112C includes a cylindrical portion 1121C and a plate portion 1122C. The first shell 111C is welded and fixed to the second shell 112C. Specifically, the cylindrical portion 1121C partially extends into the first housing 111C and its inner wall is welded and fixed to the first housing 111C. The end of the cylindrical portion 1121C away from the first housing 111C includes a first fluid port A. The plate portion 1122C includes a main valve port 1120, and the plate portion 1122C is located in the first housing 111C. The first filter element 4 is located in the second housing 112C and below the plate portion 1122C, and can filter the fluid entering from the first fluid port A.

[0069] Compared with the main valve body shown in the second embodiment, the main valve body of this embodiment has fewer parts and components, and compared with the main valve body shown in the first embodiment, the processing difficulty is relatively small.

[0070] The control valves of the above-mentioned embodiments may further include a connection portion Z connected to the main valve body for welding with an external component. When the control valve includes the connection portion Z, the first fluid port A may be formed at the connection portion Z. The housing 111 in the first embodiment is connected to the connection portion Z, the second housing 111B in the second embodiment is connected to the connection portion Z, and the second housing 112C in the third embodiment is connected to the connection portion Z. The connection portion Z may be a copper layer attached to the housing 111 or the second housing 111B or the second housing 112C, or the connection portion Z may be a copper sleeve connected to the housing 111 or the second housing 111B or the second housing 112C.

[0071] The control valve of the present application has both throttling and shut-off functions, and the valve core has high reliability of operation. In addition, the control valve shown in the above embodiments does not need to use brass material, which not only reduces material costs but also helps to achieve lightweight and miniaturization of the control valve.

[0072] In addition, the parts processed using stainless steel described in the above embodiments can also be made of carbon steel, iron, or copper.

[0073] The above description is only an example of a specific embodiment of the present invention and should not be construed as a limitation on the protection points of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A control valve, comprising a valve body component, a switch component and a valve core component, wherein the valve body component comprises a main valve port, the valve core component is located in an inner cavity of the valve body component, the valve core component comprises a valve core, the valve core comprises a valve core guide section and a valve core sealing section, the valve core sealing section comprises an auxiliary valve port, the switch component comprises a pin, the pin comprises a pin guide section, and the outer wall of the pin guide section is slidably matched with the inner wall of the valve core guide section; The control valve includes a first fluid port and a second fluid port, the valve core includes a connecting channel, the pin can open or close the auxiliary valve port, and the pin and the valve core can open or close the main valve port in cooperation; when the pin opens the auxiliary valve port, the second fluid port, the connecting channel, the auxiliary valve port, the main valve port and the first fluid port are connected.

2. The control valve according to claim 1, characterized in that: The valve core guide section includes the communication channel. When the pin opens the auxiliary valve port, the second fluid port, the communication channel, the main valve port, and the first fluid port are connected in sequence.

3. The control valve according to claim 1, characterized in that: The valve core includes a large-diameter section and a small-diameter section, the large-diameter section serves as the valve core guide section, the small-diameter section serves as the valve core sealing section, the connecting passage is a through hole connecting the inner wall and the outer wall of the valve core guide section, and the control valve includes a first working mode, a second working mode and a third working mode. In the first working mode, the valve core opens the main valve port, the pin closes the auxiliary valve port, and the first fluid port is connected with the second fluid port through the main valve port; In the second working mode, the pin does not close the auxiliary valve port, and the first fluid port is connected with the second fluid port through the through hole, the auxiliary valve port and the main valve port; In the third working mode, the pin cooperates with the valve core to close the main valve port, the pin closes the auxiliary valve port, and the first fluid port is not connected to the second fluid port.

4. The control valve according to claim 1, characterized in that: The inner wall of the valve core guide section has a groove, and the groove extends to the upper surface of the valve core guide section. The groove serves as the communication channel. The control valve includes a first working mode, a second working mode and a third working mode. In the first working mode, the valve core opens the main valve port, the pin closes the auxiliary valve port, and the first fluid port is connected with the second fluid port through the main valve port; In the second working mode, the valve core closes the main valve port, the pin does not close the auxiliary valve port, and the first fluid port is connected with the second fluid port through the groove, the auxiliary valve port and the main valve port; In the third working mode, the pin cooperates with the valve core to close the main valve port, the pin closes the auxiliary valve port, and the first fluid port is not connected to the second fluid port.

5. The control valve according to claim 1, characterized in that: The valve core guide section includes at least one notch, the notch passes through the inner side and the outer side of the valve core guide section, and the notch extends to the upper surface of the valve core guide section, the notch serves as the communication channel, and the control valve includes a first working mode, a second working mode and a third working mode. In the first working mode, the valve core opens the main valve port, the pin closes the auxiliary valve port, and the first fluid port is connected with the second fluid port through the main valve port; In the second working mode, the valve core closes the main valve port, the pin does not close the auxiliary valve port, and the first fluid port is connected with the second fluid port through the notch, the auxiliary valve port and the main valve port; In the third working mode, the pin cooperates with the valve core to close the main valve port, the pin closes the auxiliary valve port, and the first fluid port is not connected to the second fluid port.

6. The control valve according to any one of claims 1 to 5, characterized in that: The valve core is made of non-metallic material, the flow area of ​​the valve core sealing section is smaller than the flow area of ​​the main valve port, a first flow channel is included between the main valve port and the first fluid port, and the flow area of ​​the main valve port is smaller than the flow area of ​​the first flow channel.

7. The control valve according to any one of claims 1 to 5, characterized in that: The valve body component includes a connecting sleeve and a main valve body, the connecting sleeve is made of stainless steel, the main valve body includes a shell and a seat body, the shell is an integral structure, the shell is made of stainless steel, the shell is tubular, the shell is welded and fixed to the connecting sleeve, the seat body is located in the shell, the seat body is made of stainless steel, the seat body is welded and fixed to the shell, and the seat body includes the main valve port.

8. The control valve according to claim 7, characterized in that: The seat body is made by stamping a plate material, and includes a plate portion and an annular portion. The plate portion includes the main valve port, and the annular portion extends from the outer edge of the plate portion toward the first fluid port. The annular portion is welded and fixed to the shell.

9. The control valve according to claim 8, characterized in that The shell includes a first straight cylinder portion, a first conical ring portion, a second straight cylinder portion, a second conical ring portion and a third straight cylinder portion, the first conical ring portion connects the first straight cylinder portion and the second straight cylinder portion, the second conical ring portion connects the second straight cylinder portion and the third straight cylinder portion, the third straight cylinder portion includes the first fluid port, the inner diameter of the first straight cylinder portion is greater than the inner diameter of the second straight cylinder portion, and the seat body is located in the first straight cylinder portion.

10. The control valve according to any one of claims 1 to 5, characterized in that: The valve body component includes a connecting sleeve and a main valve body, the connecting sleeve is made of stainless steel material, the main valve body includes a shell and a seat body, the shell includes a first shell and a second shell, the first shell is made of stainless steel material, the first shell is tubular, the first shell is welded and fixed to the connecting sleeve, the second shell is made of stainless steel material, the second shell is tubular, the seat body is made of stainless steel material, the seat body includes the main valve port, and the first shell, the seat body, and the second shell are welded and fixed.

11. The control valve according to claim 10, characterized in that The seat body is made by stamping a plate material, and the seat body includes a plate portion and an annular portion. The plate portion includes the main valve port, and the annular portion extends from the outer edge of the plate portion toward the first fluid port. The outer wall of the annular portion is welded and fixed to the first shell, and the inner wall of the annular portion is welded and fixed to the second shell.

12. The control valve according to any one of claims 1 to 5, characterized in that: The valve body component includes a connecting sleeve and a main valve body, the connecting sleeve is made of stainless steel, the main valve body includes a first shell and a second shell, the first shell is made of stainless steel, the first shell is tubular, the first shell is welded and fixed to the connecting sleeve, the second shell is made of stainless steel, the second shell is an integral structure, the second shell includes a cylindrical portion and a plate portion, the cylindrical portion includes the first fluid port, the outer wall of the cylindrical portion is welded and fixed to the first shell, and the plate portion includes the main valve port.

13. The control valve according to any one of claims 1 to 5, characterized in that: The valve body component includes a main valve body and a connecting sleeve, the connecting sleeve is made of stainless steel, the pin is threadedly connected to the connecting sleeve, the connecting sleeve is welded and fixed to the main valve body, the main valve body is made of stainless steel, the main valve body includes a plate portion, the plate portion includes the main valve port, the control valve also includes a connecting portion, the connecting portion is used to connect the main valve body and an external component, the connecting portion is a copper layer or a red copper joint sleeve.

14. The control valve according to claim 7, characterized in that The main valve body includes a joint, which is made of stainless steel material and includes a through hole. The side wall of the shell includes an annular protrusion, one end of the joint extends into the annular protrusion, the joint is welded and fixed to the annular protrusion, and the joint includes the second fluid port.

15. The control valve according to claim 7, characterized in that The valve core is made of non-metallic material, and the seat body is made of stainless steel; The end of the valve core facing the main valve port includes at least one annular groove, and the annular groove surrounds the auxiliary valve port; Alternatively, the end of the valve core facing the main valve port includes at least one circle of lower annular ribs, and the lower annular ribs surround the auxiliary valve port; Alternatively, the seat body includes at least one circle of annular ribs, and the annular ribs surround the main valve port.

16. A control valve, comprising a valve body component, a switch component and a valve core component, wherein the valve body component comprises a main valve port, the valve core component is located in an inner cavity of the valve body component, the valve core component comprises a valve core, the switch component comprises a pin, the pin is at least partially located in the inner cavity of the valve body component, the pin is threadedly connected to the valve body component, and the pin has a first relative position and a second relative position relative to the valve body component, The valve core is sleeved with the pin, and the valve core can slide relative to the pin. The valve core includes a communication channel and a secondary valve port. The valve body component includes a first fluid port and a second fluid port. The flow of fluid from the second fluid port is defined as a positive direction, and the flow of fluid from the first fluid port is defined as a negative direction. Then: When the fluid flows in reverse and the pin is in the first relative position, the main valve port communicates with the first fluid port and the second fluid port; When the fluid flows in from the positive direction and the pin is in the first relative position, the second fluid port, the communication channel, the auxiliary valve port, the main valve port, and the first fluid port are connected in sequence; When fluid flows in from the forward direction and the pin is in the second relative position, the communication passage is not in communication with the auxiliary valve port, and the second fluid port is not in communication with the first fluid port.

17. The control valve according to claim 16, characterized in that The valve core includes a large-diameter section and a small-diameter section, the large-diameter section serves as a valve core guide section, the small-diameter section serves as a valve core sealing section, and the connecting channel is a through hole connecting the inner wall and the outer wall of the valve core guide section.

18. The control valve according to claim 16, characterized in that The inner wall of the valve core guide section is provided with a groove, the groove extends to the upper surface of the valve core guide section, and the groove serves as the communication channel.

19. The control valve according to claim 16, characterized in that The valve core guide section includes at least one notch, the notch passes through the inner side and the outer side of the valve core guide section, and the notch extends to the upper surface of the valve core guide section, and the notch serves as the communication channel.

20. The control valve according to any one of claims 16 to 19, characterized in that: The valve core is made of non-metallic material, the flow area of ​​the valve core sealing section is smaller than the flow area of ​​the main valve port, a first flow channel is included between the main valve port and the first fluid port, and the flow area of ​​the main valve port is smaller than the flow area of ​​the first flow channel.

21. The control valve according to any one of claims 16 to 19, characterized in that: The valve body component includes a connecting sleeve and a main valve body, and the main valve body includes a shell and a seat body. The shell is an integral structure, and the shell is tubular. The shell is welded and fixed to the connecting sleeve, and the seat body is located in the shell. The seat body is welded and fixed to the shell, and the seat body includes the main valve port.

22. The control valve according to claim 21, characterized in that The seat body is made by stamping a plate material, and includes a plate portion and an annular portion. The plate portion includes the main valve port, and the annular portion extends from the outer edge of the plate portion toward the first fluid port. The annular portion is welded and fixed to the shell.

23. The control valve according to any one of claims 16 to 19, characterized in that: The valve body component includes a connecting sleeve and a main valve body, the main valve body includes a shell and a seat body, the shell includes a first shell and a second shell, the first shell is tubular, the first shell is welded and fixed to the connecting sleeve, the second shell is tubular, the first shell, the seat body and the second shell are welded and fixed.

24. The control valve according to claim 23, characterized in that The seat body is made by stamping a plate material, and the seat body includes a plate portion and an annular portion. The plate portion includes the main valve port, and the annular portion extends from the outer edge of the plate portion toward the first fluid port. The outer wall of the annular portion is welded and fixed to the first shell, and the inner wall of the annular portion is welded and fixed to the second shell.

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