Electric shut-off valve
By welding the valve seat and drive housing together, and combining structures such as annular mating steps and positioning bearings, the leakage problem at the connection of the electric gate valve housing was solved, achieving a low-cost and high-sealing electric gate valve design.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO LTD
- Filing Date
- 2025-12-31
- Publication Date
- 2026-07-09
Smart Images
Figure CN2025148317_09072026_PF_FP_ABST
Abstract
Description
Electric shut-off valve
[0001] This application claims priority to the patent application filed on January 2, 2025 with the China National Intellectual Property Administration, application number 202520008608.2, entitled "Electric Shut-off Valve". Technical Field
[0002] This application relates to the field of valve technology, and more specifically, to an electric shut-off valve. Background Technology
[0003] Electric shut-off valves are used in equipment such as air conditioning systems. They are controlled by electric drive to open and close the valve port, thereby controlling the flow of pipelines. Electric shut-off valves mainly consist of two parts: a valve body and a drive unit. In related technologies, the outer shell of the valve body and the outer shell of the drive unit are directly connected by threads or indirectly connected through other shell structures.
[0004] These connection methods pose a risk of leakage at the connection points with the outer casing. To avoid leakage, a specialized sealing structure needs to be designed at the connection points, resulting in higher manufacturing costs.
[0005] Application content
[0006] This application provides an electrically operated shut-off valve to reduce the risk of leakage and lower manufacturing costs.
[0007] To achieve the above objectives, this application provides an electric shut-off valve, including a valve body component and a drive component. The valve body component includes a valve seat and a valve core structure rotatably disposed within the valve seat. A valve port is provided within the valve seat, and the valve core structure opens and closes the valve port by rotation. The drive component includes a drive housing, which is welded to the valve seat, and the drive component drives the valve core structure to rotate.
[0008] Furthermore, the outer periphery of the valve seat has an annular mating step, the annular mating step having a step circumferential surface and a step bottom surface, wherein the inner wall of the drive housing mates with the step circumferential surface, and the end face of the drive housing mates with and is welded to the step bottom surface.
[0009] Furthermore, the outer periphery of the drive housing has an annular mating step, the annular mating step having a step circumferential surface and a step bottom surface, wherein the inner wall of the valve seat mates with the step circumferential surface, and the end face of the valve seat mates with and is welded to the step bottom surface.
[0010] Furthermore, the driving component includes a driving output shaft that drives the valve core structure to rotate, and the valve body component also includes a positioning bearing, the outer ring of which mates with the inner wall of the valve seat, and the inner ring of which mates with the outer wall of the driving output shaft.
[0011] Furthermore, the inner wall of the valve seat has a valve body limiting surface, which limits the outer ring of the positioning bearing on the side facing the valve port.
[0012] Furthermore, the outer wall of the drive output shaft has an output shaft limiting surface, which is matched with the inner ring of the positioning bearing on the side away from the valve port.
[0013] Furthermore, the valve body component also includes a pre-tightening sleeve, which is installed inside the valve seat. The pre-tightening sleeve has an assembly hole. The two ends of the valve core structure are a rotating end and a sealing end, respectively. The rotating end is rotatably engaged with the assembly hole. The pre-tightening sleeve and the valve core structure are axially limited and engaged. The sealing end opens and closes the valve port by rotating the valve, and the driving component drives the rotating end to rotate.
[0014] Furthermore, the valve body component also includes a thrust bearing, the valve core structure has a thrust limiting surface, the two ends of the thrust bearing are respectively limited and matched with the thrust limiting surface and the end face of the preload sleeve, the preload sleeve and the valve seat are threadedly connected, and the preload sleeve applies a force toward the valve port to the valve core structure through the thrust bearing.
[0015] Furthermore, the valve seat has a valve body sealing block, and the valve body sealing block forms a valve port through a circumferential notch. 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. 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.
[0016] Furthermore, the drive component also includes a drive rotor, a planetary reduction gear assembly, and a drive output shaft. The drive rotor and the planetary reduction gear assembly are connected in a drive connection, and the planetary reduction gear assembly drives the valve core structure to rotate through the drive output shaft.
[0017] In this design, a valve core structure is installed inside the valve seat. The valve core structure is driven to rotate by a drive component, thereby opening and closing the valve port. In this design, the valve seat in the valve body component and the drive housing in the drive component are directly connected by welding. Compared with direct connection using threads or indirect connection through other housing structures, direct welding provides better sealing performance, reduces the risk of leakage, and is easier to implement with lower manufacturing costs. Attached Figure Description
[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:
[0019] Figure 1 shows a schematic diagram of the structure of the electric shut-off valve provided in an embodiment of this application;
[0020] Figure 2 shows a schematic diagram of the valve seat in Figure 1.
[0021] The above-mentioned figures include the following reference numerals: 100, valve body component; 150, positioning bearing; 160, thrust bearing; 202, valve port; 210, valve seat; 211, valve body limiting surface; 213, annular mating step; 220, preload sleeve; 221, assembly hole; 230, valve body sealing block; 300, valve core structure; 301, thrust limiting surface; 310, valve core body; 320, connecting rod; 330, valve core sealing block; 400, drive component; 410, drive output shaft; 412, output shaft limiting surface; 420, drive rotor; 430, planetary reduction gear assembly; 440, drive housing. Detailed Implementation
[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0023] As shown in Figures 1 and 2, an embodiment of this application provides an electric shut-off valve, including a valve body component 100 and a drive component 400. The valve body component 100 includes a valve seat 210 and a valve core structure 300 rotatably disposed within the valve seat 210. A valve port 202 is provided within the valve seat 210. The valve core structure 300 opens and closes the valve port 202 by rotation. The drive component 400 includes a drive housing 440, which is welded to the valve seat 210. The drive component 400 drives the valve core structure 300 to rotate.
[0024] In this design, a valve core structure 300 is housed within the valve seat 210. The valve core structure 300 is rotated by the drive component 400, thereby opening and closing the valve port 202. In this design, the valve seat 210 in the valve body component 100 and the drive housing 440 in the drive component 400 are directly connected by welding. Compared to direct connection using threads or indirect connection through other housing structures, direct welding offers better sealing, reduces the risk of leakage, and is easier to implement with lower manufacturing costs.
[0025] As shown in Figure 2, the outer periphery of the valve seat 210 has an annular mating step 213, which has a step circumferential surface and a step bottom surface. The inner wall of the drive housing 440 mates with the step circumferential surface, thereby limiting the radial movement. The end face of the drive housing 440 mates with the step bottom surface and is welded, thereby achieving a reliable connection between the valve seat 210 and the drive housing 440 and achieving a seal at the connection position.
[0026] The inner wall of the drive housing 440 and the circumferential surface of the annular step 213 are interference-fitted, which ensures the coaxiality of the valve seat 210 and the drive housing 440 after assembly. This results in a high degree of coaxiality between the valve core structure 300 and the drive component 400 installed in the valve seat 210, ensuring the reliability of the transmission.
[0027] Alternatively, in some embodiments not shown, the outer periphery of the drive housing 440 has an annular mating step 213, which has a step circumferential surface and a step bottom surface. The inner wall of the valve seat 210 mates with the step circumferential surface to achieve radial limiting. The end face of the valve seat 210 mates with the step bottom surface and is welded to achieve a reliable connection between the valve seat 210 and the drive housing 440, and a seal is achieved at the connection position.
[0028] The inner wall of the valve seat 210 and the circumferential surface of the annular mating step 213 are interference-fitted, which ensures the coaxiality of the valve seat 210 and the drive housing 440 after assembly. This results in a high degree of coaxiality between the valve core structure 300 and the drive component 400 installed in the valve seat 210, ensuring the reliability of the transmission.
[0029] As shown in Figure 1, the drive component 400 includes a drive output shaft 410, which drives the valve core structure 300 to rotate. The valve body component 100 also includes a positioning bearing 150, the outer ring of which mates with the inner wall of the valve seat 210, and the inner ring of which mates with the outer wall of the drive output shaft 410.
[0030] By setting a positioning bearing 150 between the outer wall of the drive output shaft 410 and the inner wall of the valve seat 210, the drive output shaft 410 is radially positioned, ensuring the coaxiality of the drive output shaft 410 and the valve seat 210. Since the valve core structure 300 is installed inside the valve seat 210, the coaxiality of the valve core structure 300 and the drive output shaft 410 is further guaranteed, preventing significant shaking during rotation and ensuring transmission reliability.
[0031] As shown in Figure 2, the inner wall of the valve seat 210 has a valve body limiting surface 211, which limits the outer ring of the positioning bearing 150 towards the valve port 202. Through the above-mentioned cooperation, the axial limiting of the outer ring of the positioning bearing 150 is achieved.
[0032] In some embodiments, the outer wall of the drive output shaft 410 has an output shaft limiting surface 412, which is engaged with the inner ring of the positioning bearing 150 on the side away from the valve port 202. Through this engagement, the axial positioning of the inner ring of the positioning bearing 150 is achieved, preventing the positioning bearing 150 from moving.
[0033] As shown in Figure 1, the valve body component 100 also includes a pre-tightening sleeve 220, which is installed inside the valve seat 210. The pre-tightening sleeve 220 has an assembly hole 221. The two ends of the valve core structure 300 are a rotating end and a sealing end, respectively. The rotating end is rotatably engaged with the assembly hole 221. The pre-tightening sleeve 220 and the valve core structure 300 are axially limited and engaged. The sealing end is driven to rotate by rotating the valve port 202, and the driving component 400 drives the rotating end to rotate.
[0034] By setting the preload sleeve 220, the radial direction of the valve core structure 300 is limited, ensuring the coaxiality of the valve core structure 300 and the valve seat 210. This further ensures the coaxiality of the valve core structure 300 and the drive component 400, preventing the valve core structure 300 from shaking during rotation. Furthermore, after installing the valve core structure 300, the preload sleeve 220 limits its axial movement, preventing internal leakage caused by incomplete closure of the valve port 202 due to axial movement.
[0035] In some embodiments, the valve body component 100 further includes a thrust bearing 160, the valve core structure 300 has a thrust limiting surface 301, the two ends of the thrust bearing 160 are respectively limited and engaged with the thrust limiting surface 301 and the end face of the preload sleeve 220, the preload sleeve 220 and the valve seat 210 are threadedly connected, and the preload sleeve 220 applies a force toward the valve port 202 to the valve core structure 300 through the thrust bearing 160.
[0036] By setting the thrust bearing 160, the valve core structure 300 can be axially limited without direct contact between the preload sleeve 220 and the valve core structure 300, thereby avoiding wear caused by friction applied to the preload sleeve 220 when the valve core structure 300 rotates.
[0037] As shown in Figure 1, the valve seat 210 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. 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.
[0038] 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 circumferential position of the clearance notch. When the physical structure of the valve core sealing block 330 corresponds to the valve port 202, the valve port 202 is blocked, thus disconnecting the valve port 202 from the cavity of the valve seat 210. 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 cavity of the valve seat 210, the connection between the valve port 202 and the cavity of the valve seat 210 is achieved.
[0039] As shown in Figure 1, the drive component 400 also includes a drive rotor 420, a planetary reduction assembly 430 and a drive output shaft 410. The drive rotor 420 and the planetary reduction assembly 430 are drivenly connected, and the planetary reduction assembly 430 drives the valve core structure 300 to rotate through the drive output shaft 410.
[0040] In this design, a planetary reduction gear assembly 430 is used, which can reduce the speed of the drive rotor 420 and increase the output torque within a compact space. This provides sufficient torque to drive the valve core structure 300 to rotate without causing it to rotate too fast, making it easy to control the rotation angle. Furthermore, the above structure makes the electric shut-off valve compact and space-saving.
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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 valve body component (100) and a drive component (400). The valve body component (100) includes a valve seat (210) and a valve core structure (300) rotatably disposed within the valve seat (210). A valve port (202) is provided within the valve seat (210). The valve core structure (300) opens and closes the valve port (202) by rotation. The drive component (400) includes a drive housing (440) which is welded to the valve seat (210). The drive component (400) drives the valve core structure (300) to rotate.
2. The electric shut-off valve according to claim 1, characterized in that, The valve seat (210) has an annular mating step (213) on its outer periphery. The annular mating step (213) has a step periphery and a step bottom surface. The inner wall of the drive housing (440) mates with the step periphery, and the end face of the drive housing (440) mates with and is welded to the step bottom surface.
3. The electric shut-off valve according to claim 1, characterized in that, The outer periphery of the drive housing (440) has an annular mating step (213), the annular mating step (213) has a step peripheral surface and a step bottom surface, wherein the inner wall of the valve seat (210) mates with the step peripheral surface, and the end face of the valve seat (210) mates with and is welded to the step bottom surface.
4. The electric shut-off valve according to claim 1, characterized in that, The drive component (400) includes a drive output shaft (410) that drives the valve core structure (300) to rotate. The valve body component (100) also includes a positioning bearing (150). The outer ring of the positioning bearing (150) is engaged with the inner wall of the valve seat (210), and the inner ring of the positioning bearing (150) is engaged with the outer wall of the drive output shaft (410).
5. The electric shut-off valve according to claim 4, characterized in that, The inner wall of the valve seat (210) has a valve body limiting surface (211), which limits the outer ring of the positioning bearing (150) on the side facing the valve port (202).
6. The electric shut-off valve according to claim 4, characterized in that, The outer wall of the drive output shaft (410) has an output shaft limiting surface (412), and the output shaft limiting surface (412) and the inner ring of the positioning bearing (150) are limited and fitted on the side away from the valve port (202).
7. The electric shut-off valve according to claim 1, characterized in that, The valve body component (100) further includes a pre-tightening sleeve (220), which is installed in the valve seat (210). The pre-tightening sleeve (220) has an assembly hole (221). The two ends of the valve core structure (300) are a rotating end and a sealing end, respectively. The rotating end is rotatably engaged with the assembly hole (221). The pre-tightening sleeve (220) and the valve core structure (300) are axially limited and engaged. The sealing end opens and closes the valve port (202) by rotation. The driving component (400) drives the rotating end to rotate.
8. The electric shut-off valve according to claim 7, characterized in that, The valve body component (100) further includes a thrust bearing (160), the valve core structure (300) has a thrust limiting surface (301), the two ends of the thrust bearing (160) are respectively limited and engaged with the thrust limiting surface (301) and the end face of the preload sleeve (220), the preload sleeve (220) and the valve seat (210) are threadedly connected, and the preload sleeve (220) applies a force toward the valve port (202) to the valve core structure (300) through the thrust bearing (160).
9. The electric shut-off valve according to claim 1, characterized in that, The valve seat (210) has a valve body sealing block (230) inside, and the valve body sealing block (230) forms the valve port (202) in the 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). 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 drive component (400) further includes a drive rotor (420), a planetary reduction assembly (430), and a drive output shaft (410). The drive rotor (420) and the planetary reduction assembly (430) are drivenly connected, and the planetary reduction assembly (430) drives the valve core structure (300) to rotate through the drive output shaft (410).