Electric stop valve

Abstract

The utility model provides an electric stop valve which comprises a shell structure, a valve element structure and a driving part, a valve port is formed in the shell structure, the valve element structure is rotationally arranged in the shell structure, the two ends of the valve element structure are a rotating end and a sealing end respectively, a cavity where the sealing end is located is a valve cavity, and the sealing end is used for opening and closing the valve port. The driving component comprises a driving shell, a driving assembly and a driving output shaft, the driving shell is in sealed connection with the shell structure, the driving assembly is arranged in a driving cavity of the driving shell, and the driving assembly drives the rotating end to rotate through the driving output shaft; the valve port and the valve cavity are respectively connected with an external pipeline, a balance channel is arranged in the electric stop valve, and the valve cavity is communicated with the driving cavity through the balance channel. According to the scheme, the valve cavity is communicated with the driving cavity provided with the driving assembly through the balance channel, so that the pressures at different positions are equal, and the situation that smooth rotation of the valve element structure is affected due to the fact that the valve element structure and the driving output shaft have obvious pressure difference in the axial direction is avoided.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to an electric shut-off valve. Background Technology

[0002] Electric shut-off valves are used in equipment such as air conditioning systems. They control the opening and closing of the valve port through electric drive, thereby controlling the flow of the pipeline. Specifically, a drive assembly rotates the output shaft, which in turn drives the valve core structure to open and close the valve port. The pressure changes within the valve chamber of an electric shut-off valve due to fluid flow and the switching on / off states are significant. In related technologies, the valve chamber and the drive chamber where the drive assembly is installed are independent. This creates an axial pressure difference on the valve core structure or the drive output shaft, and the force generated by this pressure difference affects the smooth rotation of the valve core structure. Utility Model Content

[0003] This invention provides an electric shut-off valve to avoid affecting the smooth rotation of the valve core structure due to pressure difference.

[0004] To achieve the above objectives, this utility model provides an electric shut-off valve, comprising a shell structure, a valve core structure, and a drive component. A valve port is provided within the shell structure, and the valve core structure is rotatably disposed within the shell structure. The two ends of the valve core structure are a rotating end and a sealing end, respectively. The cavity containing the sealing end is the valve chamber, and the sealing end is used to open and close the valve port. The drive component includes a drive housing, a drive assembly, and a drive output shaft. The drive housing and the shell structure are sealed together. The drive assembly is disposed within the drive chamber of the drive housing, and the drive assembly drives the rotating end to rotate via the drive output shaft. The valve port and the valve chamber are respectively connected to external pipelines. A balance channel is provided within the electric shut-off valve, connecting the valve chamber and the drive chamber.

[0005] Furthermore, the balance channel includes a valve core channel disposed within the valve core structure and an output shaft channel disposed within the drive output shaft, wherein one end of the valve core channel is connected to the valve cavity, the other end of the valve core channel is connected to one end of the output shaft channel, and the other end of the output shaft channel is connected to the drive cavity.

[0006] Furthermore, the valve core structure includes a valve core body, a connecting rod, and a valve core sealing block connected in sequence. The valve core sealing block forms a sealing end, and one end of the valve core body forms a rotating end. The valve core channel passes through the valve core body, and the connecting rod avoids the valve core channel.

[0007] Furthermore, the valve core body includes a plate-shaped block, a columnar segment, and a disc-shaped segment connected in sequence. The plate-shaped block and the drive output shaft are circumferentially limited and fitted. The outer diameter of the disc-shaped segment is larger than the outer diameter of the columnar segment. The connecting rod is connected to the disc-shaped segment. The valve core channel includes an axial channel and a radial channel. The axial channel passes through the plate-shaped block, the columnar segment, and the disc-shaped segment. The radial channel passes through the thickness direction of the plate-shaped block and communicates with the axial channel.

[0008] Furthermore, the drive output shaft includes an output shaft body and an output disk connected to each other. The outer diameter of the output disk is larger than the outer diameter of the output shaft body. The drive assembly drives the output disk to rotate, and the output shaft body drives the rotating end to rotate. The output shaft channel includes an output shaft axial channel, an output shaft radial channel, and a disk axial channel. The output shaft axial channel passes through the output shaft body along the axial direction. The output shaft radial channel passes through the output shaft body along the radial direction and communicates with the output shaft axial channel. The output shaft radial channel is located at the end of the output shaft body connected to the output disk. The disk axial channel passes through the thickness direction of the output disk and communicates with the output shaft radial channel. Both the disk axial channel and the output shaft axial channel face the drive assembly.

[0009] Furthermore, the electric shut-off valve also includes a preload sleeve and a positioning bearing installed within the housing structure. The preload sleeve axially limits the valve core structure and has an assembly hole through which at least one of the drive output shaft and the valve core structure passes. The positioning bearing is sleeved on the drive output shaft.

[0010] Furthermore, there is an installation cavity between the preload sleeve and the positioning bearing, and the balance channel also includes a preload channel disposed in the preload sleeve. The preload channel communicates with the installation cavity. The drive output shaft and / or valve core structure have an assembly gap with the inner wall of the assembly hole. The valve core channel and / or output shaft channel communicate with the preload channel through the assembly gap.

[0011] Furthermore, the drive assembly includes a drive rotor and a planetary reduction assembly, which are connected in a drive connection. The planetary reduction assembly drives the drive output shaft to rotate, and the balance channel is connected to the cavity where the planetary reduction assembly is located.

[0012] Furthermore, the outer shell structure includes a valve body sealing block, with a circumferential notch forming a valve port. The valve core structure includes a valve core body, a connecting rod, and a valve core sealing block connected in sequence. The end face of the valve core sealing block abuts against the end face of the valve body sealing block, forming a sealing end. The valve core sealing block has a solid structure and a clearance notch in the circumferential direction. The valve port is closed when the solid structure of the valve core sealing block corresponds to the valve port, and the valve port is opened when the clearance notch of the valve core sealing block corresponds to the valve port.

[0013] Furthermore, the housing structure includes a connecting seat and a valve seat that are interconnected, a valve core structure is installed inside the valve seat, and the connecting seat and the drive housing are sealed together.

[0014] In this design, the electric shut-off valve is equipped with a balance channel that connects the valve chamber and the drive chamber where the drive assembly is installed. This makes the chamber where the valve core structure and the drive output shaft are located connected. Fluid fills the chamber, making the pressure equal at different positions in the chamber. This avoids a significant pressure difference in the axial direction between the valve core structure and the drive output shaft, which would affect the smooth rotation of the valve core structure. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0016] Figure 1 A schematic diagram of the structure of the electric shut-off valve provided in an embodiment of the present invention is shown;

[0017] Figure 2 It shows Figure 1 A three-dimensional view of the valve core body and connecting rod in the valve core structure;

[0018] Figure 3 It shows Figure 2 A sectional view of the structure in the middle;

[0019] Figure 4 It shows Figure 1 A schematic diagram of the drive output shaft in the diagram;

[0020] Figure 5 It shows Figure 1 A schematic diagram of the pre-tightening sleeve in the diagram.

[0021] The above figures include the following reference numerals:

[0022] 150. Locating bearing;

[0023] 201. Valve cavity; 202. Valve port; 210. Valve seat; 220. Preload sleeve; 221. Assembly hole; 224. Preload channel; 225. Mounting cavity; 230. Valve body sealing block;

[0024] 300. Valve core structure; 310. Valve core body; 311. Plate-shaped block; 312. Columnar section; 313. Disc-shaped section; 320. Connecting rod; 330. Valve core sealing block; 340. Valve core channel; 341. Valve core axial channel; 342. Valve core radial channel;

[0025] 400. Drive component; 410. Drive output shaft; 414. Output shaft channel; 4141. Output shaft axial channel; 4142. Output shaft radial channel; 4143. Disc axial channel; 415. Output shaft body; 416. Output disc;

[0026] 420. Drive rotor; 430. Planetary reduction gear assembly; 440. Drive housing; 444. Drive cavity;

[0027] 500. Connector. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] like Figures 1 to 5 As shown, an embodiment of this utility model provides an electric shut-off valve, including a housing structure, a valve core structure 300, and a drive component 400. A valve port 202 is provided within the housing structure. The valve core structure 300 is rotatably disposed within the housing structure, with a rotating end and a sealing end at its two ends. The cavity containing the sealing end is the valve chamber 201, used to open and close the valve port 202. The drive component 400 includes a drive housing 440, a drive assembly, and a drive output shaft 410. The drive housing 440 is sealed to the housing structure. The drive assembly is disposed within the drive chamber 444 of the drive housing 440, and drives the rotating end to rotate via the drive output shaft 410. The valve port 202 and the valve chamber 201 are respectively connected to external pipelines. A balance channel is provided within the electric shut-off valve, connecting the valve chamber 201 and the drive chamber 444.

[0030] The valve port 202 and valve chamber 201 are connected to different external pipelines. Due to the external pipeline connected to valve chamber 201, a pressure difference will be formed between it and the drive chamber. In this solution, a balancing channel is provided inside the electric shut-off valve. The balancing channel connects valve chamber 201 and drive chamber 444, which is equipped with the drive assembly. In this way, the cavity where valve core structure 300 and drive output shaft 410 are located becomes a connected cavity. Fluid fills the cavity, and there is no pressure difference between valve chamber 201 and drive chamber 444. This makes the pressure equal at different positions in the cavity, thereby avoiding a significant axial pressure difference between valve core structure 300 and drive output shaft 410, which would affect the smooth rotation of valve core structure and the sealing performance of valve core structure 300 when closing the valve.

[0031] Specifically, the balancing channel includes a valve core channel 340 disposed within the valve core structure 300 and an output shaft channel 414 disposed within the drive output shaft 410. One end of the valve core channel 340 is connected to the valve cavity 201, and the other end of the valve core channel 340 is connected to one end of the output shaft channel 414. The other end of the output shaft channel 414 is connected to the drive cavity 444. In this way, the valve cavity 201, the valve core channel 340, the output shaft channel 414, and the drive cavity 444 are sequentially connected, thereby achieving communication between the valve cavity 201 and the drive cavity 444, making the fluid pressures in both equal.

[0032] like Figures 1 to 3 As shown, the valve core structure 300 includes a valve core body 310, a connecting rod 320 and a valve core sealing block 330 connected in sequence. The valve core sealing block 330 forms a sealing end, and one end of the valve core body 310 forms a rotating end. The valve core channel 340 passes through the valve core body 310, and the connecting rod 320 avoids the valve core channel 340.

[0033] In this design, connecting rod 320 connects valve core body 310 and valve core sealing block 330. Rotation of valve core body 310 drives valve core sealing block 330 to rotate, thereby opening or closing valve port 202. Valve cavity 201 and output shaft channel 414 are connected through valve core channel 340 located in valve core body 310.

[0034] Specifically, the valve core body 310 includes a plate-shaped block 311, a columnar section 312, and a disc-shaped section 313 connected in sequence. The plate-shaped block 311 and the drive output shaft 410 are circumferentially limited to achieve torque transmission. The outer diameter of the disc-shaped section 313 is larger than the outer diameter of the columnar section 312. The connecting rod 320 is connected to the disc-shaped section 313, so that the connecting rod 320 can avoid the middle area of ​​the columnar section 312.

[0035] The valve core channel 340 includes an axial valve core channel 341 and a radial valve core channel 342. The axial valve core channel 341 passes through the plate-shaped block 311, the columnar segment 312, and the disc-shaped segment 313. The radial valve core channel 342 passes through the thickness direction of the plate-shaped block 311 and communicates with the axial valve core channel 341. In this way, the axial valve core channel 341 and the radial valve core channel 342 achieve communication with the output shaft channel 414, thereby connecting the valve cavity 201 with the drive cavity 444.

[0036] like Figure 1 and Figure 4As shown, the drive output shaft 410 includes an output shaft body 415 and an output disk 416 connected to each other. The outer diameter of the output disk 416 is larger than the outer diameter of the output shaft body 415. The drive assembly drives the output disk 416 to rotate, and the output shaft body 415 drives the rotating end to rotate. The output shaft channel 414 includes an output shaft axial channel 4141, an output shaft radial channel 4142, and a disk axial channel 4143. The output shaft axial channel 4141 passes through the output shaft body 415 along the axial direction. The output shaft radial channel 4142 passes through the output shaft body 415 along the radial direction and communicates with the output shaft axial channel 4141. The output shaft radial channel 4142 is located at the end of the output shaft body 415 connected to the output disk 416. The disk axial channel 4143 passes through the thickness direction of the output disk 416 and communicates with the output shaft radial channel 4142. Both the disk axial channel 4143 and the output shaft axial channel 4141 face the drive assembly.

[0037] With the above configuration, the through-through output shaft axial channel 4141 can be directly connected to the drive cavity 444. Furthermore, the output shaft axial channel 4141 can be connected to the drive cavity 444 through the output shaft radial channel 4142 and the disc axial channel 4143, thereby connecting the valve cavity 201 with the drive cavity 444.

[0038] like Figure 1 As shown, the electric shut-off valve also includes a preload sleeve 220 and a positioning bearing 150 installed in the housing structure. The preload sleeve 220 axially limits the valve core structure 300. The preload sleeve 220 has an assembly hole 221. At least one of the drive output shaft 410 and the valve core structure 300 passes through the assembly hole 221. The positioning bearing 150 is sleeved on the drive output shaft 410.

[0039] The preload sleeve 220 can limit the axial movement of the valve core structure 300, preventing it from moving axially. The preload sleeve 220 also limits the radial movement of the valve core structure 300, and the positioning bearing 150 limits the radial movement of the drive output shaft 410, thus ensuring the coaxiality of the valve core structure 300 and the drive output shaft 410.

[0040] like Figure 1 As shown, there is an installation cavity 225 between the preload sleeve 220 and the positioning bearing 150. The balance channel also includes a preload channel 224 disposed in the preload sleeve 220. The preload channel 224 communicates with the installation cavity 225. The drive output shaft 410 and / or the valve core structure 300 have an assembly gap with the inner wall of the assembly hole 221. The valve core channel 340 and / or the output shaft channel 414 communicate with the preload channel 224 through the assembly gap.

[0041] Through the above arrangement, the valve chamber 201, valve core channel 340 and / or output shaft channel 414, assembly gap, preload channel 224, and mounting cavity 225 are sequentially connected, thereby achieving communication between the valve chamber 201 and the mounting cavity 225. This ensures that the fluid pressure in the mounting cavity 225 is equal to the fluid pressure in the valve chamber 201 and drive chamber 444, achieving pressure equality in different spaces within the outer casing structure and avoiding or reducing the impact of pressure differences on various components.

[0042] Specifically, the drive assembly includes a drive rotor 420 and a planetary reduction assembly 430, which are connected in a drive connection. The planetary reduction assembly 430 drives the drive output shaft 410 to rotate, and the balance channel is connected to the cavity where the planetary reduction assembly 430 is located.

[0043] In this design, a planetary reduction gear assembly 430 is used, which enables the reduction of the drive rotor 420 and increases the output torque within a compact space. This provides sufficient torque to drive the drive output shaft 410 and the valve core structure 300 to rotate, while preventing the valve core structure 300 from rotating too fast and making it easy to control the rotation angle. Furthermore, the above structure makes the electric shut-off valve compact and space-saving. The balance channel is connected to the cavity containing the planetary reduction gear assembly 430, preventing pressure differences from affecting the operation of the planetary reduction gear assembly 430.

[0044] like Figure 1 As shown, the outer shell structure has a valve body sealing block 230, and the valve body sealing block 230 has a circumferential notch to form a valve port 202. The valve core structure 300 includes a valve core body 310, a connecting rod 320 and a valve core sealing block 330 connected in sequence. The end face of the valve core sealing block 330 abuts against the end face of the valve body sealing block 230, and the valve core sealing block 330 forms a sealing end. The valve core sealing block 330 has a solid structure and a clearance notch in the circumferential direction. The valve port 202 is closed when the solid structure of the valve core sealing block 330 corresponds to the valve port 202, and the valve port 202 is opened when the clearance notch of the valve core sealing block 330 corresponds to the valve port 202.

[0045] With the above configuration, the rotation of the valve core body 310 and the connecting rod 320 drives the valve core sealing block 330 to rotate, thereby changing the physical structure of the valve core sealing block 330 and the position of the clearance notch in the circumferential direction. When the physical structure of the valve core sealing block 330 corresponds to the valve port 202, the valve port 202 is blocked, and the valve port 202 is disconnected from the valve cavity 201. When the clearance notch of the valve core sealing block 330 corresponds to the valve port 202, the valve port 202 is connected to the clearance notch. Since the clearance notch is connected to the valve cavity 201, the connection between the valve port 202 and the valve cavity 201 is achieved.

[0046] Specifically, the housing structure includes a connecting seat 500 and a valve seat 210 connected to each other. The valve core structure 300 is installed inside the valve seat 210, which has a valve cavity 201. The connecting seat 500 and the drive housing 440 are sealed together. The connecting seat 500 and the valve seat 210 can be configured as an integral structure or separate structures. The sealed connection between the connecting seat 500 and the drive housing 440 avoids leakage at the connection point and ensures the reliability of the electric shut-off valve.

[0047] The above description is merely an optional embodiment of this solution and is not intended to limit the solution. Various modifications and variations can be made to this solution by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this solution should be included within the scope of protection of this solution.

[0048] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0049] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] In the description of this solution, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing this solution and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this solution. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0051] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0052] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this solution.

Claims

1. An electric shut-off valve, characterized in that, The device includes a housing structure, a valve core structure (300), and a drive component (400). The housing structure has a valve port (202). The valve core structure (300) is rotatably disposed within the housing structure. The two ends of the valve core structure (300) are a rotating end and a sealing end, respectively. The cavity where the sealing end is located is a valve cavity (201). The sealing end is used to open and close the valve port (202). The drive component (400) includes a drive housing (440), a drive assembly, and a drive output shaft (410). The drive housing (440) is sealed to the housing structure. The drive assembly is disposed in the drive cavity (444) of the drive housing (440). The drive assembly drives the rotating end to rotate through the drive output shaft (410). The valve port (202) and the valve cavity (201) are respectively connected to external pipelines. The electric shut-off valve has a balance channel that connects the valve cavity (201) and the drive cavity (444).

2. The electric shut-off valve according to claim 1, characterized in that, The balance channel includes a valve core channel (340) disposed in the valve core structure (300) and an output shaft channel (414) disposed in the drive output shaft (410), wherein one end of the valve core channel (340) is connected to the valve cavity (201), the other end of the valve core channel (340) is connected to one end of the output shaft channel (414), and the other end of the output shaft channel (414) is connected to the drive cavity (444).

3. The electric shut-off valve according to claim 2, characterized in that, The valve core structure (300) includes a valve core body (310), a connecting rod (320), and a valve core sealing block (330) connected in sequence. The valve core sealing block (330) forms the sealing end, and one end of the valve core body (310) forms the rotating end. The valve core channel (340) passes through the valve core body (310), and the connecting rod (320) avoids the valve core channel (340).

4. The electric shut-off valve according to claim 3, characterized in that, The valve core body (310) includes a plate-shaped block (311), a columnar segment (312), and a disc-shaped segment (313) connected in sequence. The plate-shaped block (311) and the drive output shaft (410) are in circumferential limiting fit. The outer diameter of the disc-shaped segment (313) is larger than the outer diameter of the columnar segment (312). The connecting rod (320) is connected to the disc-shaped segment (313). The valve core channel (340) includes a valve core axial channel (341) and a valve core radial channel (342). The valve core axial channel (341) passes through the plate-shaped block (311), the columnar segment (312), and the disc-shaped segment (313). The valve core radial channel (342) passes through the thickness direction of the plate-shaped block (311) and communicates with the valve core axial channel (341).

5. The electric shut-off valve according to claim 2, characterized in that, The drive output shaft (410) includes an output shaft body (415) and an output disk (416) connected to each other. The outer diameter of the output disk (416) is larger than the outer diameter of the output shaft body (415). The drive assembly drives the output disk (416) to rotate, and the output shaft body (415) drives the rotating end to rotate. The output shaft channel (414) includes an output shaft axial channel (4141), an output shaft radial channel (4142), and a disk axial channel (4143). The output shaft axial channel (4141) passes through the output shaft body (415) along the axial direction of the output shaft body (415). The shaft body (415) has an output shaft radial channel (4142) that passes through the output shaft body (415) radially and communicates with the output shaft axial channel (4141). The output shaft radial channel (4142) is located at one end of the output shaft body (415) that connects to the output disk (416). The disk axial channel (4143) passes through the thickness direction of the output disk (416) and communicates with the output shaft radial channel (4142). Both the disk axial channel (4143) and the output shaft axial channel (4141) face the drive assembly.

6. The electric shut-off valve according to claim 2, characterized in that, The electric shut-off valve further includes a preload sleeve (220) and a positioning bearing (150) installed in the housing structure. The preload sleeve (220) axially limits the valve core structure (300). The preload sleeve (220) has an assembly hole (221). At least one of the drive output shaft (410) and the valve core structure (300) passes through the assembly hole (221). The positioning bearing (150) is sleeved on the drive output shaft (410).

7. The electric shut-off valve according to claim 6, characterized in that, There is an installation cavity (225) between the preload sleeve (220) and the positioning bearing (150). The balance channel also includes a preload channel (224) disposed in the preload sleeve (220). The preload channel (224) communicates with the installation cavity (225). The drive output shaft (410) and / or the valve core structure (300) have an assembly gap with the inner wall of the assembly hole (221). The valve core channel (340) and / or the output shaft channel (414) communicate with the preload channel (224) through the assembly gap.

8. The electric shut-off valve according to claim 1, characterized in that, The drive assembly includes a drive rotor (420) and a planetary reduction assembly (430). The drive rotor (420) and the planetary reduction assembly (430) are drivenly connected. The planetary reduction assembly (430) drives the drive output shaft (410) to rotate. The balance channel is connected to the cavity where the planetary reduction assembly (430) is located.

9. The electric shut-off valve according to claim 1, characterized in that, The outer casing structure includes a valve body sealing block (230), which forms the valve port (202) through a circumferential notch. The valve core structure (300) includes a valve core body (310), a connecting rod (320), and a valve core sealing block (330) connected in sequence. The end face of the valve core sealing block (330) abuts against the end face of the valve body sealing block (230), forming the sealing end. The valve core sealing block (330) has a solid structure and a clearance notch in the circumferential direction. The valve port (202) is closed when the solid structure of the valve core sealing block (330) corresponds to the valve port (202), and the valve port (202) is opened when the clearance notch of the valve core sealing block (330) corresponds to the valve port (202).

10. The electric shut-off valve according to claim 1, characterized in that, The housing structure includes a connecting seat (500) and a valve seat (210) connected to each other. The valve core structure (300) is installed inside the valve seat (210). The connecting seat (500) and the drive housing (440) are sealed together.

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