Valve seat assembly machining method, valve seat assembly and electric valve

Abstract

The invention relates to a valve seat assembly machining method, a valve seat assembly and an electric valve.The valve seat assembly machining method comprises the following steps that a valve seat and a valve port piece are pre-machined, a containing cavity is formed in the valve seat, a valve port is formed in one end of the valve port piece, and the valve port is used for being in sealing fit with a valve element; the valve port piece is installed in the containing cavity and fixedly connected with the valve seat, and the valve port is made to communicate with the containing cavity; a first through hole is formed in the side wall of the valve seat; a connector is formed in the side wall of the valve port piece through the first through hole, and the first through hole and the connector are coaxially arranged. According to the valve seat assembly machining method, the assembling difficulty of the valve seat and the valve port piece can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric valve processing, in particular to a valve seat assembly processing method, a valve seat assembly and an electric valve. BACKGROUND

[0002] The electric valve is used for cutting off or passing through the medium, and mainly comprises a valve core, a valve seat, an inlet connector and an outlet connector. The valve seat is provided with a valve port. The inlet connector is connected to the valve seat, and the outlet connector is connected to the valve seat through the valve port. The valve core can block or open the valve port to separate or connect the inlet connector and the outlet connector.

[0003] A common electric valve is provided with an inlet connector and an outlet connector which are coaxially arranged on the side wall of the valve seat through a first through hole and a second through hole respectively. The valve seat is provided with a valve port member. One end of the valve port member is used to form the valve port and cooperate with the valve core. The side wall of the other end is provided with an interface for conducting the inlet connector or the outlet connector. When the valve core and the valve port member are assembled, the first through hole or the second through hole and the interface need to be located on the same straight line to facilitate the installation of the inlet connector and the outlet connector. However, the assembly precision of the valve seat and the valve port member is high, which leads to high assembly difficulty. SUMMARY

[0004] Therefore, it is necessary to provide a valve seat assembly processing method, a valve seat assembly and an electric valve which can reduce the assembly difficulty of the valve seat and the valve port member.

[0005] A valve seat assembly processing method comprises the following steps: a valve seat and a valve port member are respectively pre-processed. The valve seat has a receiving cavity. One end of the valve port member has a valve port which is used to seal and cooperate with the valve core. The valve port member is installed in the receiving cavity and fixedly connected with the valve seat, and the valve port is connected with the receiving cavity. A first through hole is formed on the side wall of the valve seat. An interface is formed on the side wall of the valve port member through the first through hole, and the first through hole and the interface are coaxially arranged.

[0006] In one embodiment, the valve seat assembly processing method further comprises: a second through hole is formed on the side wall of the valve seat, and the second through hole is coaxially arranged with the first through hole.

[0007] In one embodiment, after the first through hole, the interface and the second through hole are processed, the valve seat assembly processing method further comprises: a cooperation surface is processed on the inner wall of the valve port, and the cooperation surface is used to seal and cooperate with the edge of the valve core.

[0008] In one embodiment, after the first through hole, the interface and the second through hole are processed, the valve seat assembly processing method further comprises: a stop step is processed on the valve seat, and a guide sleeve is connected to the stop step; wherein the guide sleeve is sleeved on the outer periphery of the valve core and is used to guide the movement of the valve core.

[0009] In one of the embodiments, the stop step and the matching surface are machined by one clamping.

[0010] In one of the embodiments, after the matching surface and the stop step are machined, the valve seat assembly machining method further comprises: inserting the first connecting pipe into the first through hole and inserting it into the interface; and inserting the second connecting pipe into the second through hole.

[0011] In one of the embodiments, the valve seat, the guide sleeve, the first connecting pipe and the second connecting pipe are integrally welded by furnace welding, and a valve seat assembly is formed.

[0012] In one of the embodiments, during the pre-machining of the valve seat, a positioning groove is formed at the bottom of the accommodating cavity, and the positioning groove is used to install the valve port piece.

[0013] In one of the embodiments, the pre-machining mode of the valve seat and the valve port piece is configured as bar stock pre-machining.

[0014] A valve seat assembly is machined by the valve seat assembly machining method of any one of the above embodiments, and the inner wall of the valve port is provided with a matching surface for sealing cooperation with the edge of the valve core. The matching surface is configured as a conical surface, and the radius of the matching surface shows a decreasing trend along the direction from the valve core to the valve port piece.

[0015] An electric valve comprises a transmission assembly, a valve core and the valve seat assembly of the above embodiments. The valve core is movably arranged in the valve seat, and the transmission assembly is used to drive the valve core to move towards the direction of approaching or moving away from the valve port, so as to open or close the valve port.

[0016] In one of the embodiments, a balance channel is formed on the valve core, and the balance channel penetrates through one end of the valve core close to the valve port and one end of the valve core away from the valve port.

[0017] Compared with the prior art, the valve seat assembly machining method, the valve seat assembly and the electric valve provided by the application have the following advantages. The valve port piece is first fixedly installed into the accommodating cavity of the valve seat, then the first through hole is formed on the side wall of the valve seat by punching operation, and then the interface is formed on the side wall of the valve port piece through the first through hole by punching operation. Therefore, the first through hole and the interface can be coaxial. Therefore, during the installation of the valve port piece into the accommodating cavity of the valve seat, the circumferential installation angle and the axial installation angle of the valve port piece do not need to be considered. Therefore, the precision requirement during the assembly of the valve port piece and the valve seat is greatly reduced, and thus the assembly difficulty of the valve seat and the valve port piece can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative effort based on these drawings.

[0019] Figure 1 An axial sectional view of an electric valve provided by the present application;

[0020] Figure 2 A sectional view of a valve seat formed by pre-machining provided by the present application;

[0021] Figure 3 A sectional view of a valve port member formed by pre-machining provided by the present application;

[0022] Figure 4 A sectional view of the valve seat and the valve port member when assembled;

[0023] Figure 5 A sectional view of a valve seat assembly.

[0024] Reference signs: 10, valve seat; 11, accommodating cavity; 12, first through hole; 13, second through hole; 14, stop step; 15, positioning groove; 20, valve port member; 21, valve port; 211, mating surface; 22, interface; 30, first connecting pipe; 40, second connecting pipe; 50, valve core; 51, balance passage; 60, guide sleeve; 70, transmission assembly; 71, screw rod; 72, threaded sleeve; 73, rotor; 80, sleeve; 90, valve seat assembly. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when an assembly is referred to as "fixed to" or "disposed on" another assembly, it can be directly on the other assembly or there can be a middle assembly. When an assembly is referred to as "connected to" another assembly, it can be directly connected to the other assembly or there can be a middle assembly. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the specification of the present application are for illustrative purposes only and do not represent the only implementation.

[0027] Furthermore, the terms "first", "second", etc. are used herein for descriptive purposes only and are not to be construed as indicating or implying relative importance or a quantity of indicated technical features. Thus, a feature defined with "first", "second" can include at least one of the feature explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise explicitly and specifically defined.

[0028] In the present application, unless otherwise explicitly specified and defined, "on", "under", "below", "above", and "over" of a first feature to a second feature can mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, "on", "above", and "over" of a first feature to a second feature can mean that the first feature is directly above or obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. "Under", "below", and "underneath" of a first feature to a second feature can mean that the first feature is directly below or obliquely below the second feature, or only means that the first feature is horizontally lower than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The use of the term "and / or" in the description of the present application includes any and all combinations of one or more of the associated listed items.

[0030] Please refer to Figure 1 and Figure 5 , the present application provides an electric valve, the electric valve includes a valve seat assembly 90, a valve core 50 and a transmission assembly 70. Wherein, the valve seat assembly 90 includes a valve seat 10 and a valve port piece 20, the valve port piece 20 is installed in the valve seat 10, and the valve port piece 20 is provided with a valve port 21, and the transmission assembly 70 is used to drive the valve core 50 to move towards the direction of approaching or away from the valve port 21, so as to open or close the valve port 21.

[0031] Please refer to Figure 5The valve seat assembly 90 further comprises a first connector pipe 30 and a second connector pipe 40. The valve seat 10 has a receiving cavity 11 inside. The valve seat 10 has a first through hole 12 and a second through hole 13 on the sidewall of the valve seat 10, which are in communication with the receiving cavity 11. The valve port piece 20 is installed in the receiving cavity 11. The valve port piece 20 has an interface 22 which is in communication with the valve port 21. The interface 22 is coaxial with the first through hole 12. The first connector pipe 30 extends into the receiving cavity 11 through the first through hole 12 and is inserted into the interface 22. The second connector pipe 40 extends into the receiving cavity 11 through the second through hole 13. The valve core 50 is movably installed in the receiving cavity 11. When the valve core 50 moves to open the valve port 21 following the transmission assembly 70, the valve port 21 is in communication with the receiving cavity 11, and the first connector pipe 30 and the second connector pipe 40 are in communication. When the valve core 50 moves to close the valve port 21 following the transmission assembly 70, the valve port 21 is not in communication with the receiving cavity 11, and the first connector pipe 30 and the second connector pipe 40 are blocked.

[0032] The first through hole 12 and the second through hole 13 are coaxial. In this way, the first connector pipe 30 and the second connector pipe 40 are on the same straight line.

[0033] In an embodiment, as shown in Figure 4 The inner wall of the valve port 21 has a matching surface 211 which is used for sealingly matching with the edge of the valve core 50.

[0034] Optionally, the matching surface 211 is configured as a conical surface, and the radius of the matching surface 211 has a decreasing trend along the direction from the valve core 50 to the valve port piece 20. In this way, when the outer edge of the valve core 50 abuts against the matching surface 211, the matching surface 211 can simultaneously provide the valve core 50 with axial support force and radial support force, so that the valve port 21 is tightly closed. Moreover, the outer edge of the valve core 50 can form a line seal with the matching surface 211, thereby facilitating the improvement of the sealing precision between the valve core 50 and the valve port 21 when the valve port 21 is closed. Moreover, by adjusting the depth of the valve core 50 extending into the valve port 21, the opening size of the valve port 21 can be adjusted, thereby playing a role of flow regulation.

[0035] In an embodiment, as shown in Figure 1 The bottom of the receiving cavity 11 is provided with a positioning groove 15, and the valve port piece 20 is installed in the positioning groove 15. The positioning groove 15 can play a positioning role on the valve port piece 20, facilitating the installation of the valve port piece 20 at a predetermined position, so as to ensure the coaxiality between the valve seat 10 and the valve port piece 20. Moreover, by providing the positioning groove 15, the contact area between the valve seat 10 and the valve port piece 20 can be increased, thereby facilitating the firm connection between the valve seat 10 and the valve port piece 20. Specifically, the valve seat 10 and the valve port piece 20 can be welded.

[0036] The valve seat assembly 90 further comprises a guide sleeve 60 fixedly connected with the valve seat 10, and a containing cavity 11 is formed between the guide sleeve 60 and the valve seat 10. The valve core 50 is movably arranged in the guide sleeve 60, and one end of the valve core 50 can extend into the containing cavity 11 to close or open the valve port 21. The guide sleeve 60 can guide the movement of the valve core 50.

[0037] As shown in the drawings, a stop step 14 is arranged on the inner wall of the valve seat 10, and the guide sleeve 60 extends into the valve seat 10 and stops at the stop step 14. The stop step 14 plays a role of installation and positioning. Figure 1

[0038] Optionally, the outer circumferential wall of the guide sleeve 60 is in interference fit with the inner circumferential wall of the stop step 14, so that the guide sleeve 60 can be prevented from deviating, thereby facilitating the guarantee of the coaxiality between the guide sleeve 60 and the valve port 20.

[0039] Optionally, in an embodiment, the transmission assembly 70 comprises a screw rod 71 and a threaded sleeve 72. The threaded sleeve 72 is sleeved on one end of the guide sleeve 60 away from the containing cavity 11 and is in transition fit with the outer wall of the guide sleeve 60, and the threaded sleeve 72 is fixedly connected with the valve seat 10. Alternatively, the connection mode among the threaded sleeve 72, the valve seat 10 and the guide sleeve 60 can also be that the threaded sleeve 72 is sleeved on one end of the guide sleeve 60 away from the containing cavity 11 and is fixedly connected with the guide sleeve 60, and the threaded sleeve 72 is fixedly connected with the valve seat 10. Alternatively, the connection mode among the threaded sleeve 72, the valve seat 10 and the guide sleeve 60 can also be that the threaded sleeve 72 is sleeved on one end of the guide sleeve 60 away from the containing cavity 11 and is fixedly connected with the guide sleeve 60.

[0040] The screw rod 71 is sequentially arranged in the threaded sleeve 72 and the guide sleeve 60 and is in threaded connection with the threaded sleeve 72, and one end of the screw rod 71 is connected with the valve core 50. With the rotation of the screw rod 71 relative to the threaded sleeve 72, the screw rod 71 can drive the valve core 50 to move along the guide sleeve 60 towards the direction of approaching or moving away from the valve port 21.

[0041] Of course, the cooperation mode of the screw rod 71 and the threaded sleeve 72 can also be that the screw rod 71 is connected with the valve seat 10 in axial limit, the threaded sleeve 72 is circumferentially limited on the valve seat 10, the valve core 50 is connected with the threaded sleeve 72, and with the circumferential rotation of the screw rod 71, the threaded sleeve 72 can drive the valve core 50 to move axially. In other embodiments, the transmission assembly 70 can also be configured in the mode that the moving iron core and the static iron core are attracted to each other. As long as it can drive the valve core 50 to move towards the direction of approaching or moving away from the valve port 20. Hereinafter, the cooperation process of the transmission assembly 70 driving the valve core 50 will be introduced by taking the example that the threaded sleeve 72 is fixedly connected with one end of the guide sleeve 60 away from the valve seat 10, and the screw rod 71 drives the valve core 50 to move along the guide sleeve 60 towards the direction of approaching or moving away from the valve port 21. ​

[0042] Further, as shown in Figure 1 , the electric valve further comprises a sleeve 80 fixedly connected to the valve seat 10, and the transmission assembly 70 further comprises a rotor 73 movably arranged in the sleeve 80 and fixedly connected to the screw rod 71 at an end away from the valve port piece 20. Since the screw rod 71 is threadedly connected to the threaded sleeve 72, when the rotor 73 rotates to drive the screw rod 71 to rotate, the screw rod 71 can move axially relative to the threaded sleeve 72 and the valve seat 10 to approach or move away from the valve port 21.

[0043] Please continue to refer to Figure 1 , the valve core 50 is provided with a balance channel 51 penetrating through the valve core 50 at an end close to the valve port 21 and an end away from the valve port 21. When the valve core 50 blocks the valve port 21 and the first connecting pipe 30 is used as an outlet pipe, since the pressure at the first connecting pipe 30 is relatively small and the pressure in the containing cavity 11 is relatively large, the valve core 50 will be subjected to a pressure directed to the valve port 21, resulting in that a relatively large force needs to be provided by the screw rod 71 to the valve core 50 to overcome the pressure on the valve core 50 and drive the valve core 50 to move in a direction away from the valve port 21. In the embodiment, the balance channel 51 is provided on the valve core 50 to make the first connecting pipe 30 communicate with the guide sleeve 60, so that the end face of the valve core 50 close to the valve port piece 20 and the end face away from the valve port piece 20 are subjected to the same pressure, thereby facilitating the screw rod 71 to drive the valve core 50 to move in a direction away from the valve port piece 20 to open the valve port piece 20.

[0044] A sealing member is arranged between the valve core 50 and the guide sleeve 60, which can be arranged on the valve core 50 or the guide sleeve 60, and the inner ring of the sealing member is in contact with the valve core 50 and the outer ring of the sealing member is in contact with the guide sleeve 60. The sealing member can be configured as a sealing ring.

[0045] The application further provides a valve seat assembly processing method, and the valve seat assembly of the electric valve in the above embodiment is processed by the valve seat assembly processing method. Please refer to Figures 2 to 5 , specifically, the valve seat assembly processing method comprises the following steps:

[0046] S110, respectively pre-process the valve seat 10 and the valve port piece 20;

[0047] S120, install the valve port piece 20 in the containing cavity 11 and fixedly connect the valve port piece 20 with the valve seat 10;

[0048] S130, open the first through hole 12 on the side wall of the valve seat 10;

[0049] S140, open the interface 22 on the side wall of the valve port piece 20 through the first through hole 12, and make the first through hole 12 and the interface 22 oppositely arranged;

[0050] S150, a second through hole 13 is formed on the side wall of the valve seat 10.

[0051] It can be understood that the valve port piece 20 is first fixedly installed into the accommodating cavity 11 of the valve seat 10, and then the first through hole 12 is processed by punching the side wall of the valve seat 10, and then the interface 22 is processed by punching the side wall of the valve port piece 20 through the first through hole 12, so that the first through hole 12 and the interface 22 can be coaxially opposite. Therefore, during the installation of the valve port piece 20 into the accommodating cavity 11 of the valve seat 10, the circumferential installation angle and the axial installation angle requirements of the valve port piece 20 do not need to be considered. Therefore, the precision requirement in the assembly process of the valve port piece 20 and the valve seat 10 is greatly reduced, and thus the assembly difficulty of the valve seat 10 and the valve port piece 20 can be reduced. Moreover, during the step 150, the first through hole 12 is used as a reference to ensure that the second through hole 13 is coaxial with the first through hole 12.

[0052] In an embodiment, the step S110 includes: forming a positioning groove 15 at the bottom of the accommodating cavity 11.

[0053] Optionally, the pre-processing mode in the step 110 is configured as bar stock pre-processing. That is, the pre-processing mode of the valve seat 10 and the valve port piece 20 is configured as bar stock pre-processing.

[0054] Optionally, in the step 120, the valve port piece 20 is welded to the valve seat 10.

[0055] The valve seat assembly processing method further includes the following steps:

[0056] S160, a matching surface 211 is processed on the inner wall of the valve port 21.

[0057] It can be understood that since the matching surface 211 is used for sealing cooperation with the edge of the valve core 50, the processing precision requirement of the matching surface 211 is relatively high in order to ensure the sealing performance of the valve port 21 when it is closed. By placing the step of processing the matching surface 211 after the steps of forming the first through hole 12, the second through hole 13 and the interface 22, the deformation of the matching surface 211 caused by the influence of the installation clamp and the hole turning on the valve seat 10 and the valve port piece 20 during the punching operation can be avoided. Therefore, it is beneficial to improve the sealing performance of the valve port 21 when it is closed. In other embodiments, as shown in Figure 3 , in the step 110, the inner wall of the valve port piece 20 can also be preliminarily processed, as long as a processing allowance for processing the matching surface 211 in the subsequent step 160 can be reserved.

[0058] The valve seat assembly processing method further includes the following steps:

[0059] S170, a stop step 14 is processed on the valve seat 10.

[0060] It can be understood that, since the guide sleeve 60 is sleeved on the outer periphery of the valve core 50 and is used to support the valve core 50, whether the stop step 14 is machined in place will affect whether the guide sleeve 60 and the valve seat 10 are assembled in place, and then will affect the coaxiality between the valve core 50 and the valve port piece 20, and will affect whether the valve core 50 can seal the valve port 21. By placing the step of machining the stop step 14 after the steps of opening the first through hole 12, the second through hole 13 and the interface 22, the deformation of the stop step 14 caused by the influence of the installation clamp and the hole turning on the valve seat 10 and the valve port piece 20 when the valve seat 10 and the valve port piece 20 are punched can be avoided. Moreover, since the positioning groove 15 is opened at the bottom of the accommodating cavity 11 in step 110, when step 170 is subsequently performed, the stop step 14 can be machined with the positioning groove 15 as a reference, thereby being beneficial to guarantee the coaxiality between the guide sleeve 60 and the valve seat 10, and then guarantee the coaxiality between the valve core 50 and the valve port piece 20.

[0061] Optionally, the machining of the stop step 14 and the machining of the matching surface 211 are performed through one-time clamping. In this way, compared with the separate machining of the matching surface 211 and the stop step 14, the one-time clamping machining forming makes the positioning reference of the machining of the matching surface 211 and the stop step 14 the same, avoids the influence of clamping in the machining process, can improve the coaxiality of the matching surface 211 and the stop step 14, and thereby is beneficial to improve the coaxiality of the valve port 21 and the valve core 50.

[0062] The valve seat assembly machining method further includes the following steps:

[0063] S180, the first connecting pipe 30 is arranged in the first through hole 12 and is inserted into the interface 22;

[0064] S190, and the second connecting pipe 40 is inserted into the second through hole 13.

[0065] There is no sequence between the step 180 and the step 190, and the step 180 can be performed first, or the step 190 can be performed first; or the step 180 and the step 190 are performed simultaneously.

[0066] The valve seat assembly machining method further includes the following steps:

[0067] S200, the valve seat 10, the guide sleeve 60, the first connecting pipe 30 and the second connecting pipe 40 are integrally welded through furnace welding, and a valve seat assembly 90 is formed.

[0068] Compared with other welding methods such as flame welding, integrally welding the valve seat 10, the guide sleeve 60, the first connecting pipe 30 and the second connecting pipe 40 through furnace welding can reduce the deformation amount of the valve seat 10, the guide sleeve 60, the first connecting pipe 30 and the second connecting pipe 40.

[0069] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0070] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A valve seat assembly machining method characterized by, The valve seat assembly processing method comprises the following steps: Respectively pre-process the valve seat (10) and the valve port piece (20), the valve seat (10) has a containing cavity (11) therein, one end of the valve port piece (20) has a valve port (21) for sealing cooperation with the valve core (50); The valve port piece (20) is installed in the containing cavity (11) and fixedly connected with the valve seat (10), and the valve port (21) is communicated with the containing cavity (11); A first through hole (12) is formed on the side wall of the valve seat (10); An interface (22) is formed on the side wall of the valve port piece (20) through the first through hole (12), and the first through hole (12) is coaxially arranged with the interface (22).

2. The valve seat assembly machining method of claim 1, wherein, A second through hole (13) is formed on the side wall of the valve seat (10), and the second through hole (13) is coaxially arranged with the first through hole (12).

3. The valve seat assembly machining method of claim 2, wherein, After the first through hole (12), the interface (22) and the second through hole (13) are processed, the valve seat assembly processing method further comprises: A matching surface (211) is processed on the inner wall of the valve port (21), and the matching surface (211) is used for sealing cooperation with the edge of the valve core (50).

4. The valve seat assembly machining method of claim 3, wherein, After the first through hole (12), the interface (22) and the second through hole (13) are processed, the valve seat assembly processing method further comprises: A stop step (14) is processed on the valve seat (10), A guide sleeve (60) is connected to the stop step (14), Wherein, the guide sleeve (60) is sleeved on the outer periphery of the valve core (50), and is used for guiding the movement of the valve core (50).

5. The valve seat assembly machining method of claim 4, wherein, The stop step (14) and the matching surface (211) are processed by one clamping.

6. The valve seat assembly machining method of claim 4, wherein, After the matching surface (211) and the stop step (14) are processed, the valve seat assembly processing method further comprises: A first connecting pipe (30) is arranged in the first through hole (12) and inserted into the interface (22); A second connecting pipe (40) is inserted into the second through hole (13).

7. The valve seat assembly machining method of claim 6, wherein, The valve seat (10), the guide sleeve (60), the first connecting pipe (30) and the second connecting pipe (40) are integrally welded by furnace welding, and a valve seat assembly (90) is formed.

8. The valve seat assembly machining method of claim 1, wherein, During the pre-processing of the valve seat (10), a positioning groove (15) is formed at the bottom of the containing cavity (11), and the positioning groove (15) is used for installing the valve port piece (20).

9. The valve seat assembly machining method of claim 1, wherein, The pre-processing mode of the valve seat (10) and the valve port piece (20) is configured as bar stock pre-processing.

10. A valve seat assembly characterized by, The valve seat assembly is processed by the valve seat assembly processing method in any one of claims 1-8, the inner wall of the valve port (21) is provided with a matching surface (211), the matching surface (211) is used for sealing cooperation with the edge of the valve core (50), the matching surface (211) is configured as a conical surface, and along the direction from the valve core (50) to the valve port piece (20), the radius of the matching surface (211) shows a decreasing trend.

11. An electrically powered valve characterised in that, The electric valve comprises a transmission assembly (70), a valve core (50) and a valve seat assembly (90) as claimed in claim 10, the valve core (50) is movably arranged in the valve seat (10), the transmission assembly (70) is used to drive the valve core (50) to move towards or away from the valve port (21) to open or close the valve port (21).

12. The motorized valve of claim 11, wherein, The valve core (50) is provided with a balance channel (51), the balance channel (51) penetrates one end of the valve core (50) close to the valve port (21) and one end of the valve core (50) away from the valve port (21).

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