Valve device and assembling method thereof

Abstract

The invention provides a valve device and an assembling method thereof.The valve device comprises a valve body assembly, the valve body assembly comprises a filtering mechanism and a valve body, and the filtering mechanism comprises a partition component, a first filtering unit and a second filtering unit; the blocking component is fixedly connected with the valve body and is in sealing fit with the valve body, the valve device is provided with a first cavity and a second cavity which are located on different sides of the blocking component, a first filtering unit and a second filtering unit are distributed in the axial direction and are both installed on the blocking component, the first filtering unit is located in the first cavity, and the second filtering unit is located in the second cavity. The second filtering unit is positioned in the second chamber; the valve body assembly is provided with a first connector, a second connector and a valve port, the first connector and the second connector are used for inflow or outflow of media, the first cavity is communicated with the first connector, the second cavity is communicated with the second connector, and the first cavity and the second cavity can be communicated through the valve port. The scheme can simplify the installation and reduce the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve, in particular to a valve device and an assembling method thereof. BACKGROUND

[0002] As shown in Figure 13 , 14 , Figure 13 is a structural schematic diagram of an electronic expansion valve; Figure 14 is Figure 13 a structural schematic diagram of a valve body assembly, which is an axial cross-sectional view.

[0003] The electronic expansion valve comprises a valve body assembly 001 and a coil component 002. As shown in Figure 14 , the valve body assembly 001 comprises a rotor component 01, a nut 02, a valve rod component 03 and a valve seat 04, the valve seat 04 is provided with a valve port 04a, the coil component 002 is energized to drive the rotor component 01 to rotate, the rotor component 01 drives the valve rod component 03 to rotate, the valve rod component 03 and the nut 02 are threadedly engaged, and then move axially to open and close the valve port 04a.

[0004] If impurities exist in the medium entering the electronic expansion valve, the impurities will enter the electronic expansion valve, and then affect the working performance of the electronic expansion valve. As shown in Figure 13 , in order to reduce the influence of impurities on the electronic expansion valve, the air conditioner main machine manufacturer will be equipped with a first filter 003 and a second filter 004 when using the electronic expansion valve, the first filter 003 is connected to one interface of the valve body assembly 001 through a first pipeline 005, and the second filter 004 is connected to another interface of the valve body assembly 001 through a second pipeline 006.

[0005] However, in this way, when the electronic expansion valve is installed in the air conditioning system, the pipelines need to be welded separately before and after the electronic expansion valve to connect the filters, which is complicated to install and increases the cost. SUMMARY

[0006] The purpose of the present application is to provide a valve device and an assembling method thereof, which can simplify the installation and reduce the cost.

[0007] The present application provides a valve device, comprising a valve body assembly, the valve body assembly comprising a filtering mechanism and a valve body, the filtering mechanism comprising a blocking component, a first filter unit and a second filter unit; the blocking component is fixedly connected with the valve body and sealingly cooperates with the valve body, the valve device has a first chamber and a second chamber located at different sides of the blocking component, the first filter unit and the second filter unit are distributed along the axial direction and are both installed on the blocking component, the first filter unit is located in the first chamber, and the second filter unit is located in the second chamber;

[0008] The valve body assembly has a first interface and a second interface for inflow or outflow of a medium, the first chamber and the first interface are in communication, the second chamber and the second interface are in communication, and the first chamber and the second chamber can be communicated through the valve port.

[0009] The valve device comprises a valve body assembly comprising a filter mechanism, the filter mechanism comprising a partition component, a first filter unit and a second filter unit; the valve device has a first chamber and a second chamber, the partition component is used to separate the first chamber and the second chamber, the first filter unit and the second filter unit are distributed in an axial direction and are both mounted on the partition component, the first filter unit is located in the first chamber, and the second filter unit is located in the second chamber.

[0010] The valve body assembly has a first interface and a second interface for inflow or outflow of a medium, the first chamber and the first interface are in communication, the second chamber and the second interface are in communication, and the first chamber and the second chamber can be communicated through the opened valve port, the first filter unit is arranged on a path from the first interface to the valve port, and the second filter unit is arranged on a path from the second interface to the valve port.

[0011] The application also provides an assembly method of a valve device, which is used to assemble the valve device in any one of the third to eleventh items, and comprises the following steps:

[0012] Assembling the filter mechanism into the valve body;

[0013] Assembling the valve seat core and the filter mechanism to realize sealing cooperation between the valve seat core and the annular plate;

[0014] Assembling to form the valve device.

[0015] The valve device in the application is internally provided with a filter mechanism, the first filter unit and the second filter unit of the filter mechanism enclose a filter chamber, and the valve port is located in the filter chamber, so that the first interface to the valve port and the second interface to the valve port are both provided with corresponding filter units, impurities are not easy to enter the position of the valve port, and the reliability of cooperation between the valve rod component and the valve port is beneficial to be ensured. Moreover, the filter mechanism is provided with a partition component to isolate the first chamber and the second chamber on both sides of the valve port, to maintain the function that the two chambers can only be communicated through the valve port, and the two filter units can be installed, so that the filter units are directly arranged in the interior of the valve device, without an external filter as described in the background art, the system structure can be simplified, and the installation difficulty and cost are reduced. The assembly method of the valve device has the same technical effects, and also makes the assembly of the valve device provided with the filter mechanism relatively simple. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a structural diagram of a valve device in an embodiment of the present application;

[0017] Figure 2 Fig. 2 is a structural diagram of a valve body assembly in an embodiment of the present application; Figure 1

[0018] Fig. 3 is a structural diagram of a valve body in an embodiment of the present application; Figure 3 Figure 2 Fig. 4 is a structural diagram of a filter mechanism in an embodiment of the present application;

[0019] Figure 4 Figure 3 Fig. 5 is a structural diagram of a filter mechanism in an embodiment of the present application;

[0020] Figure 5 Fig. 6 is a structural diagram of a barrier member in an embodiment of the present application; Figure 4

[0021] Fig. 7 is a structural diagram of a first filter unit in an embodiment of the present application; Figure 6 Figure 4 Fig. 8 is a structural diagram of a first filter unit in an embodiment of the present application;

[0022] Figure 7 Figure 6 Fig. 9 is an axial sectional view of a first filter unit in an embodiment of the present application;

[0023] Figure 8 Fig. 10 is a structural diagram of a second filter unit in an embodiment of the present application; Figure 4

[0024] Fig. 11 is an axial sectional view of a second filter unit in an embodiment of the present application; Figure 9 Figure 8 Fig. 12 is a structural diagram of a valve body and a filter mechanism in an embodiment of the present application;

[0025] Figure 10 Figure 2 Fig. 13 is a structural diagram of a valve body in an embodiment of the present application;

[0026] Figure 11 Fig. 14 is a structural diagram of an end cap in an embodiment of the present application; Figure 10

[0027] Fig. 15 is a structural diagram of an end cap in an embodiment of the present application; Figure 12 Figure 10 Fig. 16 is a structural diagram of an electronic expansion valve in an embodiment of the present application;

[0028] Figure 13 Fig. 17 is a structural diagram of a valve body assembly in an embodiment of the present application, and is a view from an axial sectional view angle.

[0029] Figure 14 Figure 13 Fig. 18 is a structural diagram of a valve body assembly in an embodiment of the present application, and is a view from an axial sectional view angle.

[0030] Reference signs in the above-described drawings are explained as follows:

[0031] ​​​​​​​​100 - valve body assembly;

[0032] 100A - first chamber; 100B - second chamber;

[0033] 10 - valve base; 20 - rotor member; 30 - transmission member; 40 - valve stem member;

[0034] 50 - filtering mechanism; 51 - first filtering unit; 511 - first clamping hoop; 512 - first filtering screen; 5121 - first cylindrical filtering screen; 5122 - top filtering screen; 5122a - filtering screen through hole; 52 - second filtering unit; 521 - second clamping hoop; 522 - second filtering screen; 5221 - second cylindrical filtering screen; 5222 - bottom filtering screen; 53 - blocking member; 531 - cylindrical portion; 5311 - first cylindrical segment; 5312 - second cylindrical segment; 53121 - annular band; 5313 - third cylindrical segment; 5314 - first cylindrical portion inner wall segment; 5315 - second cylindrical portion inner wall segment; 532 - annular plate; 532a - middle portion through hole;

[0035] 60 - housing; 70 - coil fixing frame; 80 - valve body; 801 - first valve body inner wall segment; 802 - second valve body inner wall segment; 803 - third valve body inner wall segment; 80a - first interface; 120 - end cover; 120a - second interface; 1201 - second stepped sidewall; 1202 - second stepped surface; 90 - valve seat core; 90a - inlet hole; 90b - valve port; 901 - first stepped sidewall; 110 - sealing member;

[0036] 200 - coil member;

[0037] 301 - first connecting pipe; 302 - second connecting pipe;

[0038] 001 - valve body assembly; 002 - coil member; 003 - first filter; 004 - second filter; 005 - first pipeline; 006 - second pipeline; 01 - rotor member; 02 - nut; 03 - valve stem member; 04 - valve seat; 04a - valve port. DETAILED DESCRIPTION

[0039] In order to make the personnel in the technical field better understand the present application scheme, the present application is further described in detail below in combination with the drawings and specific embodiments.

[0040] Please refer to Figure 1 , 2 , Figure 1 is a structural schematic view of the valve device in the embodiments of the present application, which is an axial cross-sectional view; Figure 2 is Figure 1 a structural schematic view of the valve body assembly 100 in the embodiments of the present application.

[0041] The valve device in this embodiment includes a valve body assembly 100 and a coil component 200. The coil component 200 is sleeved on the outside of the valve body assembly 100. The valve body assembly 100 is also provided with a coil fixing frame 70, which can position the coil component 200. The valve device is also provided with a first connecting pipe 301 and a second connecting pipe 302, having a first interface 80a and a second interface 120a. The first connecting pipe 301 is installed on the first interface 80a of the valve body assembly 100, and the second connecting pipe 302 is installed on the second interface 120a of the valve body assembly 100. The first connecting pipe 301 is used to introduce the medium into the valve body assembly 100, and the second connecting pipe 302 is used to discharge the medium out of the valve body assembly 100. The valve device can be a two-way valve, that is, the medium can also enter the valve body assembly 100 through the second connecting pipe 302 and then be discharged through the first connecting pipe 301. The valve device can be applied to an air-conditioning system, and the medium is correspondingly a refrigerant.

[0042] The valve body assembly 100 in this embodiment is as follows Figure 2 As shown, it includes a rotor component 20, a transmission component 30, a valve stem component 40, a valve seat core 90, a valve base 10, a shell 60 and a valve body 80. The valve body 80 in this embodiment is specifically a sleeve structure, and also includes an end cover 120 arranged at the lower end of the valve body 80. The shell 60 includes a tubular structure, and a top cover is also integrally provided on the top of the tubular structure. The lower end of the shell 60 is open, at least a portion of the rotor component 20 is arranged in the shell 60, the valve base 10 is axially arranged between the valve body 80 and the shell 60, and the valve seat core 90 is installed on the valve base 10. The valve body 80, the valve base 10, and the outer shell 60 constitute the entire shell structure of the valve body assembly 100. It can be seen that the shell structure of the valve body assembly 100 is not limited to such a setting. It only needs to construct an inner cavity for installing internal components such as the rotor component 20 and the valve stem component 40. For example, the valve body 80 and the end cover 120 can be set as an integral whole, or the valve body 80 and the valve base 10 can be set as an integral whole. The valve body is not limited to the structure of the valve body 80. Considering the difficulty of processing and the ease of assembly, a split setting is performed here.

[0043] In detail, the first interface 80a of the valve body assembly 100 is provided on the valve body 80, and the first interface 80a is specifically provided on the side of the valve body 80, and the second interface 120a is provided at one axial end of the valve body assembly 100, which is the end away from the rotor component 20, specifically provided at Figure 2 The end cover 120 shown in FIG has an axially extending through hole as the second interface 120a. The valve seat core 90 has a valve port 90b of the valve device, which can connect the first interface 80a with the second interface 120a or disconnect the first interface 80a from the second interface 120a.

[0044] The valve device in this embodiment is an electronic expansion valve, the coil component 200 is energized to control the rotation of the rotor component 20, the rotor component 20 drives the rotation of the valve stem component 40, the transmission component 30 is provided with internal threads, which cooperates with the external threads of the valve stem component 40, so that when the valve stem component 40 rotates, the valve stem component 40 can also move axially under the cooperation of the threaded transmission, so that the valve stem component 40 can move away to open the valve port 90b, the first interface 80a and the second interface 120a are connected, or the valve stem component 40 approaches to close the valve port 90b, the first interface 80a and the second interface 120a are disconnected.

[0045] It should be emphasized that the valve body assembly 100 of the valve device in this embodiment includes a filtering mechanism 50, which includes a blocking component 53, a first filtering unit 51 and a second filtering unit 52. The valve body assembly 100 has a first chamber 100A and a second chamber 100B, which can be the inner cavity of the valve body 80, or the inner cavity including the valve body 80, as shown in Figure 2 The first chamber 100A and the second chamber 100 are located on different sides of the blocking component 53, specifically on both sides of the blocking component 53 in the axial direction, and the blocking component 53 is used to separate the first chamber 100A and the second chamber 100B. The first filtering unit 51 and the second filtering unit 52 are distributed along the axial direction and are both installed on the blocking component 53. At this time, the first filtering unit 51 is located in the first chamber 100A, and the second filtering unit 52 is located in the second chamber 100B. Among them, the first chamber 100A and the first interface 80a remain connected, and the second chamber 100B and the second interface 120a remain connected. Although the first chamber 100A and the second chamber 100B are separated by the blocking component 53, the first chamber 100A and the second chamber 100B can only be connected through the valve port 90b, that is, only when the valve port 90b is open, the first chamber 100A and the second chamber 100B are connected, and when the valve port 90b is closed, the first chamber 100A and the second chamber 100B are not connected. In addition, the first filtering unit 51 is arranged on one side of the valve port 90b in the axial direction, and the second filtering unit 52 is arranged on the other side of the valve port 90b in the axial direction. In other words, the first filtering unit 51 is arranged on the path from the first interface 80a to the valve port 90b, and the second filtering unit 51 is arranged on the path from the second interface 120a to the valve port 90b. In this way, the medium needs to pass through two filtering units before entering the valve port 90b, that is, the medium entering from the first interface 80a needs to pass through the first filtering unit 51 before reaching the valve port 90b, and the medium entering from the second interface 120a needs to pass through the second filtering unit 52 before reaching the valve port 90b.

[0046] Therefore, the first filter unit 51 and the second filter unit 52 in the embodiment enclose a filter cavity, the valve port 90b is located in the filter cavity, and the filter units are arranged on both sides of the valve port 90b. Impurities are not easy to enter the position of the valve port 90b. The main performance influence of impurities on the valve device is that the impurities stay in the valve port part, thereby affecting the reliability of the cooperation between the valve rod part 40 and the valve port 90b. As long as the impurities are reduced or prevented from entering the position of the valve port 90b, the reliability of the cooperation between the valve rod part 40 and the valve port 90b can be ensured. Moreover, the filter mechanism 50 in the embodiment is provided with the blocking part 53 to isolate the first chamber 100A and the second chamber 100B on the two sides of the valve port 90b in the axial direction, to maintain the function that the two chambers are only communicated through the valve port 90b, and the two filter units can be installed. In this way, the filter units are directly arranged in the interior of the valve device, without the need to externally connect a filter to the valve device as described in the background art. The system structure can be simplified, and the installation difficulty and cost can be reduced.

[0047] In addition, in the background art, since the external filter needs to be welded separately, the leakage probability of the welding position is also increased. The built-in filter mechanism 50 in the embodiment can reduce the leakage probability. Moreover, if the valve device is applied to an air conditioning system, the installation space required by the pipeline assembly of the air conditioning system is large if the external filter in the background art is used. In this way, the main machine needs to be designed to have a larger accommodation space, which may lead to an increase in the overall size of the machine and an increase in the complexity of the pipeline design of the main machine. The scheme of the embodiment of the application can obviously reduce the installation space and facilitate the design of the main machine. In addition, in the background art, the external filter is a certain distance away from the valve cavity and the valve port of the valve device and needs to be communicated through an external pipeline. The passageway of the filter is large, and the passageway of the external pipeline connected thereto is small. The medium flows through the filter from the external pipeline and then flows to the valve cavity through the external pipeline, and needs to pass through multiple flow passage changes. This may increase the flow noise of the medium. The built-in filter mechanism 50 in the embodiment of the application can reduce the noise caused by the change in the passageway of the external pipeline and the filter.

[0048] Please continue to refer to Figures 3 to 5 , Figure 3 for Figure 2 the structural schematic view of the valve body 80 and the filter mechanism 50 in the embodiment; Figure 4 for Figure 3 the structural schematic view of the filter mechanism 50 in the embodiment; Figure 5 for Figure 4 the structural schematic view of the blocking part 53 in the embodiment.

[0049] The valve device in this embodiment includes a valve body 80, the inner cavity of which includes a portion of the aforementioned first chamber 100A (the other portion of the first chamber 100A is formed by the valve base 10) and a second chamber 100B. The barrier component 53 includes a cylindrical portion 531. At least a portion of the outer wall of the cylindrical portion 531 seals against the inner wall of the valve body 80 along its entire circumference, thereby separating the first chamber 100A from the second chamber B. For example, the cylindrical portion 531 can have an interference fit with the inner wall of the valve body 80. The cylindrical portion 531 can be press-fitted into the valve body 80, simplifying installation and providing a seal while securing the inner wall. Alternatively, the cylindrical portion 531 can be welded to the inner wall of the valve body 80. The welding can be performed by laser penetrating circumferential welding, i.e., welding the cylindrical portion 531 and the valve body 80 from the outside along their entire circumference. Both interference fit and welding can also be performed simultaneously. In this way, the blocking component 53 can be reliably fixed to the valve body 80 and maintained relatively sealed with the valve body 80, thereby blocking the first chamber 100A and the second chamber 100B on both sides of the blocking component 53, and preventing the chambers on both sides from being directly connected without passing through the valve port 90b.

[0050] Figure 5 In the embodiment, the barrier member 53 includes an annular plate 532 having a central through hole 532a. The radial outer side of the annular plate 532 is connected to the inner wall of the cylindrical portion 531. The annular plate 532 and the cylindrical portion 531 can be integrally or separately provided. In this case, the cross section of the barrier member 53 along the axial direction is substantially H-shaped. Figure 2 As shown, the valve body assembly 100 in this embodiment includes a valve seat core 90, which is mounted on the valve base 10 and has a valve port 90b. At least a portion of the valve seat core 90 is located in the first chamber 100A. One end of the valve seat core 90 is inserted into the central through-hole 532a of the annular plate 532 and is sealed to the annular plate 532. The chamber of the valve body assembly 100 on one axial side of the annular plate 532 is the first chamber 100A, and the chamber on the other axial side of the annular plate 532 is the second chamber 100B. Because the valve port 90b is provided on the valve seat core 90, the valve seat core 90 and the annular plate 532 require a sealed connection to prevent the first chamber 100A and the second chamber 100B from communicating directly without passing through the valve port 90b. This configuration facilitates the separation of the first chamber 100A and the second chamber 100B by the annular plate 532, and also facilitates the installation of the valve seat core 90. Of course, the annular plate 532 may not be provided. For example, the lower end of the valve seat core 90 may extend radially and directly seal with the inner wall of the cylindrical portion 531 .

[0051] Alternatively, it is known that the valve device may not be provided with the valve seat core 90, for example, the central through hole 532a of the annular plate 532 is directly provided as the valve port 90b, and the valve stem component 40 can be sealed with the central through hole 532a. In this case, the annular plate 532 still needs to withstand the impact of the valve stem component 40 blocking.Figure 2 The valve seat core 90 is provided with a valve port 90b and is installed on the valve base 10, and the structure is more reliable. In addition, a plurality of inlet holes 90a can be provided on the side of the valve seat core 90 in the circumferential direction, so that the medium entering from the first interface 80a of the valve body 80 can flow to the valve port 90b relatively uniformly, and the plurality of inlet holes 90a can also be used as throttling holes.

[0052] As shown in Figure 2 , one end of the valve seat core 90 is provided with a first annular stepped portion, a first stepped side wall 901 extending in the axial direction is inserted into the middle through hole 532a, and a sealing member 110 is arranged between the first stepped surface of the first annular stepped portion and the annular plate 532, for example, an O-ring, a gasket, etc. In this way, the sealing connection between the valve seat core 90 and the blocking member 53 is easy to achieve and simple and reliable. Of course, the valve seat core 90 and the annular plate 532 of the blocking member 53 can also be sealed in other ways, for example, one end of the valve seat core 90 is directly and tightly fitted into the middle through hole 532a, or a sealing ring is arranged between the hole wall of the middle through hole 532a and the valve seat core 90, but because the annular plate 532 mainly plays a blocking role, the thickness is relatively thin, and the sealing member 110 is arranged between the first stepped surface and the upper surface of the annular plate 532, the sealing is more reliable. For another example, the valve seat core 90 and the middle through hole 532 do not need to be inserted, the valve seat core 90 can directly abut to the upper surface of the annular plate 532, and a sealing member is arranged therebetween, at this time, the middle through hole 532 only plays a role of connecting the valve port 90b and the second interface 120a, compared with, the middle through hole 532 of the annular plate 532 in the embodiment simultaneously plays the roles of installation and connection.

[0053] Please continue to refer to Figure 2 , 4 , and understand in combination with Figures 6-9 , Figure 6 , the structure diagram of the first filter unit 51 in the embodiment is shown in Figure 4 ; Figure 7 , the axial sectional view of the first filter unit 51 in the embodiment is shown in Figure 6 ; Figure 8 , the structure diagram of the second filter unit 52 in the embodiment is shown in Figure 4 ; Figure 9 , the axial sectional view of the second filter unit 52 in the embodiment is shown in Figure 8 .

[0054] The first filter unit 51 in the embodiment includes a first filter screen 512 and an annular first clamp 511, the first filter screen 512 includes a first cylindrical filter screen 5121 and a top filter screen 5122 located at the top end of the first cylindrical filter screen 5121, and the first filter screen 512 is arranged in the first clamp 511 in the axial direction. Figure 2For the view angle, the top end is the upper end, the bottom end is the lower end, the direction of the valve stem component 40 moving to open the valve port 90b is upward, and vice versa. The first clamp 511 has an annular groove, and the bottom end of the first cylindrical filter screen 5121 is clamped in the annular groove of the first clamp 511 to maintain fixed connection with the first clamp 511. Since the valve port 90b is located between the first filter unit 51 and the second filter unit 52, the top filter screen 5122 of the first filter screen 512 needs to be provided with a filter screen through hole 5122a, and the valve seat core 90 passes through the filter screen through hole 5122a, so that the valve port 90b is located between the first filter unit 51 and the second filter unit 52. The outer wall of the valve seat core 90 and the filter screen through hole 5122a can be tightly matched to reduce the medium directly entering the valve seat core 90 without passing through the first filter unit 51. At this time, the first clamp 511 of the first filter unit 51 is installed in the cylindrical part 531 of the blocking component 53. The first clamp 511 is provided to reinforce the first cylindrical filter screen 5121, making the installation of the first filter screen 512 and the cylindrical part 531 more reliable. The first clamp 511 is made of metal or other hard material, for example.

[0055] The structure of the second filter unit 52 is similar to that of the first filter unit 51. The second filter unit 52 includes a second filter screen 522 and an annular second clamp 521. The second filter screen 522 includes a second cylindrical filter screen 5221 and a bottom filter screen 5222 located at the bottom end of the second cylindrical filter screen 5221. The second clamp 521 has an annular groove, and the top end of the second cylindrical filter screen 5221 is clamped in the annular groove of the second clamp 521. The second clamp 521 is installed in the cylindrical part 531. The second clamp 521 is provided to reinforce the second cylindrical filter screen 5221, making the installation of the second filter screen 522 and the cylindrical part 531 more reliable. The second clamp 521 is also made of metal or other hard material. The bottom filter screen 5222 of the second filter screen 522 does not need to be provided with a filter screen through hole 5122a, because the second filter screen 522 and the valve seat core 90 have no assembly relationship. The medium flowing from the second interface 120a can be filtered by the bottom filter screen 5222 and the second cylindrical filter screen 5221, then enter the inner cavity of the second filter screen 522, and then flow to the valve port 90b.

[0056] It can be understood that the first filter unit 51 is provided with the first cylindrical filter screen 5121 due to the cooperation with the valve seat core 90, and the medium can pass through the first cylindrical filter screen 5121 to enter the inlet hole 90a. The top end of the first filter unit 51 is actually provided with no top filter screen 5122, and the top end of the first cylindrical filter screen 5121 can be in abutting cooperation with the outer wall of the valve seat core 90, and the opening of the top end of the first cylindrical filter screen 5121 is the filter screen through hole at this time. As for the second filter unit 52, it has no cooperation with the valve seat core 90, and only needs to filter the medium entering the valve port 90b from the second interface 120a. At this time, the structure of the second filter unit 52 is more flexible, for example, it can be directly provided as a circular filter screen. Of course, the second filter unit 52 is also provided with the second cylindrical filter screen 5221, and the filtering area can be increased relatively, so as to improve the filtering effect and reduce the resistance to the medium. When the second filter unit 52 is combined with the second clamp 521 and installed on the blocking part 53, it is more reliable and convenient.

[0057] As shown in Figure 4 , the first clamp 511 and the second clamp 521 are in interference fit with the inner wall of the cylindrical part 531. The inner wall of the cylindrical part 531 is divided into the first cylindrical inner wall segment 5314 and the second cylindrical inner wall segment 5315 along the axial direction by the annular plate 532. The first clamp 511 is in interference fit with the first cylindrical inner wall segment 5314, and the second clamp 521 is in interference fit with the second cylindrical inner wall segment 5315. The first clamp 511 and the second clamp 521 are arranged to facilitate the interference fit with the cylindrical part 531 of the blocking part 53. The interference fit installation method is relatively simple and reliable. It can be understood that the connection mode of the first filter unit 51 and the second filter unit 52 with the blocking part 53 is not limited to interference fit, for example, it can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53.

[0058] It can be understood that the first filter unit 51 is provided with the first cylindrical filter screen 5121 due to the cooperation with the valve seat core 90, and the medium can pass through the first cylindrical filter screen 5121 to enter the inlet hole 90a. The top end of the first filter unit 51 is actually provided with no top filter screen 5122, and the top end of the first cylindrical filter screen 5121 can be in abutting cooperation with the outer wall of the valve seat core 90, and the opening of the top end of the first cylindrical filter screen 5121 is the filter screen through hole at this time. As for the second filter unit 52, it has no cooperation with the valve seat core 90, and only needs to filter the medium entering the valve port 90b from the second interface 120a. At this time, the structure of the second filter unit 52 is more flexible, for example, it can be directly provided as a circular filter screen. Of course, the second filter unit 52 is also provided with the second cylindrical filter screen 5221, and the filtering area can be increased relatively, so as to improve the filtering effect and reduce the resistance to the medium. When the second filter unit 52 is combined with the second clamp 521 and installed on the blocking part 53, it is more reliable and convenient. Figure 4 , 7 , 9It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53.

[0058] It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53. Figure 4 , 7 , 9It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53.

[0058] It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53. Figure 4 , 7 , 9It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53.

[0058] It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53. Figure 4 , 7 , 9It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53.

[0058] It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53. Figure 4 , 7 , 9It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53.

[0058] It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53. Figure 4 , 7 , 9It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53.

[0058] It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53. Figure 4 , 7 , 9It can be understood that the first filter unit 51 and the second filter unit 52 with the blocking part 53 are not limited to interference fit, for example, they can also be connected by fasteners such as screws, buckles, etc. It is not necessary to set the clamp, and the filter screen itself can be fixedly connected with the blocking part 53.

[0059] like Figure 5 As shown, the cylindrical portion 531 of the blocking component 53 includes a first cylindrical section 5311, a second cylindrical section 5312 and a third cylindrical section 5313 distributed in sequence along the axial direction. The outer wall of the second cylindrical section 5312 is sealed with the inner wall of the valve body 80. The outer diameter of the first cylindrical section 5311 and the outer diameter of the third cylindrical section 5313 are both smaller than the outer diameter of the second cylindrical section 5312. The first cylindrical section 5311 and the first filter unit 51 are fixed by riveting, and the third cylindrical section 5313 and the second filter unit 52 are fixed by riveting. That is, the first clamp 511 and the second clamp 521 are not only interference-fitted with the blocking component 53, but are also fixed by riveting at both ends of the cylindrical portion 531 in the axial direction, so that the fixation is more reliable. Specifically, as Figure 5 As shown, the outer walls of the first and third cylindrical sections 5311, 5313 are inclined, that is, their outer diameters taper away from the annular plate 532, facilitating press riveting. Furthermore, the outer wall of the second cylindrical section 5312 is not limited to integrally fitting with the inner wall of the valve body 80. The outer wall of the second cylindrical section 5312 can be provided with two or more axially distributed annular bands 53121, which protrude radially. This facilitates press assembly and laser penetration welding from the outside of the valve body 80.

[0060] Look again Figures 10-12 , Figure 10 for Figure 2 A schematic structural diagram of the middle valve body 80, the end cover 120 and the filter mechanism 50; Figure 11 for Figure 10 A schematic structural diagram of the middle valve body 80; Figure 12 for Figure 10 Schematic diagram of the structure of the middle end cover 120.

[0061] like Figure 10 As shown, the side of the valve body 80 is provided with a first interface 80a for assembly and connection with the first connecting pipe 301. The medium can flow from the first connecting pipe 301 to the first interface 80a and then enter the inner cavity of the valve body 80. The inner wall of the valve body 80 is composed of the first valve body inner wall section 801, the second valve body inner wall section 802 and the third valve body inner wall section 803 along the axial direction from top to bottom. The first valve body inner wall section 801 and the third valve body inner wall section 803 are both equal diameter wall sections, and the diameter of the first valve body inner wall section 801 is smaller than the diameter of the third valve body inner wall section 803. The second valve body inner wall section 802 is designed with a gradual diameter change to connect the first valve body inner wall section 801 and the third valve body inner wall section 803. Figure 10It is understood that the filtering mechanism 50 can be assembled into the valve body 80 from bottom to top, the second valve body inner wall segment 802 plays a guiding role, the outer diameter of the cylindrical part 531 of the filtering mechanism 50 is smaller than the diameter of the third valve body inner wall segment 803 and larger than the diameter of the first valve body inner wall segment 801, so that it can be gradually in interference fit with the first valve body inner wall segment 801 during assembly.

[0062] The end cover 120 in this embodiment is installed at the bottom of the valve body 80, the end cover 120 is provided with an axial through hole as a second interface 120a, and the end cover 120 is also provided with a second annular stepped part, forming an upward second stepped surface 1202 and a second stepped side wall 1201 extending in the axial direction. The inner wall of the lower end of the valve body 80 can be in interference fit with the second stepped side wall 1201 of the end cover 120, and the end surface of the lower end of the valve body 80 can abut on the second stepped surface 1202 and be welded and fixed with the second stepped surface 1202, so that the installation is more reliable. Figure 12 In this embodiment, the second stepped side wall 1201 can also be provided with a radially protruding annular band to facilitate and reliably assemble the interference fit.

[0063] This embodiment also provides an assembly method of a valve device, comprising the following steps:

[0064] S1, assembling the filtering mechanism 50 into the valve body 80;

[0065] That is, the filtering mechanism 50 is assembled as a whole with the valve body 80, the first filtering unit 51 and the second filtering unit 52 can be interference fitted into the blocking part 53, and then the filtering mechanism 50 is interference fitted into the valve body 80. After pressing, laser penetration welding can be performed on the filtering mechanism 50 and the valve body 80. It can be seen that all welding steps can be performed uniformly.

[0066] S2, assembling the valve seat core 90 and the filtering mechanism 50 to make the valve seat core 90 and the annular plate 532 in sealing fit;

[0067] The valve seat core 90 is inserted into the first filtering unit 51 and is in sealing fit with the blocking part 50. For example, the sealing part 110 is placed on the annular plate 532 of the blocking part 50 in advance, so that after the valve seat core 90 is inserted into position, the sealing part 110 is automatically pressed tightly, or the valve seat core 90 is only pressed into the middle through hole 532a of the annular plate 532, and the sealing fit can also be achieved.

[0068] S3, assembling to form a valve device.

[0069] Specifically, the valve base 10 and the valve body 80, the valve seat core 90 can be assembled first, and then the rotor part 20, the transmission part 30, the valve rod part 40 and the housing 60 are assembled to form a valve device.

[0070] The housing 60 and the valve base 10, and the valve body 80 and the valve base 10 can be press-fitted and simultaneously welded. This assembly method realizes the assembly of the valve device in a relatively simple manner.

[0071] The principles and implementations of the present application are described in the specific examples herein, and the above examples are only used to help understand the method and its core idea of the present application. It should be pointed out that, for ordinary skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A valve device, characterized by The valve body assembly comprises a filter mechanism and a valve body, the filter mechanism comprises a barrier component, a first filter unit and a second filter unit; the barrier component is fixedly connected with the valve body and sealingly cooperates with the valve body, the valve device has a first chamber and a second chamber located at different sides of the barrier component, the first filter unit and the second filter unit are distributed in an axial direction and are both installed on the barrier component, the first filter unit is located in the first chamber, and the second filter unit is located in the second chamber; The valve body assembly has a first interface and a second interface for inflow or outflow of medium, the first chamber and the first interface are communicated, the second chamber and the second interface are communicated, and the first chamber and the second chamber can be communicated through the valve port.

2. The valve device of claim 1, wherein The inner cavity of the valve body comprises at least part of the first chamber and the second chamber, the barrier component is arranged in the valve body, and the barrier component comprises a cylindrical portion, at least part of the outer wall of the cylindrical portion and the inner wall of the valve body sealingly cooperate in the whole circumferential direction.

3. The valve device of claim 2, wherein The barrier component comprises an annular plate with a central through hole, the radial outer side of the annular plate is connected with the inner wall of the cylindrical portion; The valve device further comprises a valve seat core, at least part of the valve seat core is located in the first chamber, the valve seat core is arranged with the valve port, and the valve seat core and the annular plate sealingly cooperate; or the central through hole is the valve port.

4. The valve device of claim 3, wherein One end of the valve seat core is inserted into the central through hole and sealingly connected with the annular plate.

5. The valve device of claim 4, wherein The valve seat core is arranged with a first annular stepped portion, a first stepped side wall of the first annular stepped portion extending in an axial direction is inserted into the central through hole, and a sealing component is arranged between the first stepped surface of the first annular stepped portion and the annular plate.

6. The valve device of claim 3, wherein The first filter unit comprises a first filter screen and an annular first clamp, the first filter screen comprises a first cylindrical filter screen, the first clamp has an annular groove, the bottom end of the first cylindrical filter screen is clamped into the annular groove of the first clamp, the top end of the first filter screen has a filter screen through hole, the valve seat core passes through the filter screen through hole, and the first clamp is installed in the cylindrical portion.

7. The valve device of claim 6, wherein The second filter unit comprises a second filter screen and an annular second clamp, the second filter screen comprises a second cylindrical filter screen and a bottom filter screen located at the bottom end of the second cylindrical filter screen, the second clamp has an annular groove, the top end of the second cylindrical filter screen is clamped into the annular groove of the second clamp, and the second clamp is installed in the cylindrical portion.

8. The valve device of claim 7, wherein The first clamp and the second clamp are both in interference fit with the inner wall of the cylindrical portion.

9. The valve device of claim 8, wherein The first cylindrical filter screen gradually increases in radial dimension in a direction close to the annular plate; and the second cylindrical filter screen gradually increases in radial dimension in a direction close to the annular plate.

10. Valve device according to any of claims 2-9, characterized in that The cylindrical part comprises a first cylindrical section, a second cylindrical section and a third cylindrical section arranged in sequence along the axial direction, the outer wall of the second cylindrical section is in sealing fit with the inner wall of the valve body, the outer diameter of the first cylindrical section and the outer diameter of the third cylindrical section are both smaller than the outer diameter of the second cylindrical section, the first cylindrical section and the first filter unit are fixed by riveting, and the third cylindrical section and the second filter unit are fixed by riveting.

11. Valve device according to any of claims 2-9, characterized in that The cylindrical part and the inner wall of the valve body are in interference fit, or are welded, or are in interference fit and welded at the same time.

12. A method of assembling a valve device, characterized by The valve device is assembled by using the method, and the valve device comprises: The filter mechanism is assembled into the valve body; The valve seat core and the filter mechanism are assembled to be in sealing fit with the annular plate; The valve device is assembled.

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