Remote control electric valve

Abstract

The utility model relates to a kind of remote control electric valve. Including the executor device and valve body device of being connected;Valve body device includes the valve body structure being provided with water outlet and inlet, lower valve seat and upper valve seat and valve core subassembly are set in the inner chamber of valve body structure;Valve core subassembly includes upper guide cover, upper valve rod is set in upper guide cover, upper valve plug is detachably connected in the lower end of upper valve rod, lower valve plug is detachably connected on upper valve plug and located below upper valve seat;Executor device includes with the outer installation box of being connected to valve body structure, lifting screw rod is set in outer installation box, lifting screw rod is detachably connected with upper valve rod;Lifting drive subassembly, control transmission subassembly and stroke control subassembly are set in outer installation box.The utility model uses double valve core valve seat structure, and good tightness, and valve rod valve core detachably connect, compared with the valve core of integrated structure, the utility model has the advantages of simple and efficient and cost-saving.

Description

Technical Field

[0001] This utility model belongs to the field of electric valve technology, and in particular relates to a remote control electric valve. Background Technology

[0002] An electric valve is a device that uses an electric actuator to control the opening, closing, or regulation of a valve. It can be divided into two parts: the upper part is the electric actuator, and the lower part is the valve. Electric valves are commonly used in industrial pipeline systems that require remote control, automation, or precise regulation, as well as in some specific applications.

[0003] Electric valves provide high-precision valve position control and flow regulation. They can automatically adjust the valve opening degree according to the signals sent by the control system to achieve precise control of fluid flow, pressure and other parameters, and ensure stable system operation and accurate process parameters. They can realize remote monitoring and operation, improve the automation level of the system, reduce manual operation costs and errors, and respond to control commands in a short time. They are suitable for application scenarios that require rapid adjustment and response to changes.

[0004] Current electric valves use a single valve core for sealing. During use, because the valve core directly contacts and controls fluid flow, it is susceptible to erosion and wear. Wear leads to incomplete valve closure, exacerbating internal or external leakage. Furthermore, the valve core and stem are welded or integrally formed; when the valve core is eroded by fluid and its surface sealing is severely affected, the entire valve core needs to be replaced, resulting in high maintenance costs and contradicting the principles of cost reduction and efficiency improvement. Additionally, the aforementioned electric valves are not suitable for automatic flow control. Therefore, there is an urgent need to design a remotely controlled electric valve to address these issues. Utility Model Content

[0005] This invention provides a remote-controlled electric valve with a reasonable structural design to solve the technical problems existing in the prior art. This invention adopts a double valve core and seat structure, which provides good sealing performance, and the valve stem and valve core are detachably connected. Compared with a one-piece valve core structure, this invention has the advantages of simplicity, high efficiency, and cost savings.

[0006] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is as follows: A remote control electric valve includes an actuator device and a valve body device connected to each other; the valve body device includes a valve body structure with an outlet and an inlet, and a lower valve seat and an upper valve seat and a valve core assembly that cooperates with the two are provided in the inner cavity of the valve body structure; the valve core assembly includes an upper guide cover installed at the top opening of the valve body structure, an upper valve stem arranged longitudinally passing through the upper guide cover, and an upper valve plug detachably connected to the lower end of the upper valve stem for controlling the opening and closing of the upper valve seat. A lower valve plug located below the upper valve seat is detachably connected to the upper valve plug for controlling the opening and closing of the lower valve seat; the actuator device includes an outer mounting box connected to the valve body structure, a lifting screw rotatably connected to the outer mounting box, and the lifting screw is detachably connected to the upper valve stem; a lifting drive assembly for driving the lifting screw to move up and down is provided in the outer mounting box; a control transmission assembly connected to the lifting drive assembly is provided in the outer mounting box, and a stroke control assembly connected to the control transmission assembly is also provided for controlling the opening and closing of the lifting drive assembly.

[0007] The advantages and positive effects of this utility model are as follows: This utility model provides a remote-controlled electric valve. By setting a lower valve seat and an upper valve seat in conjunction with the lower valve plug and upper valve plug in the valve core assembly, a double valve plug sealing operation is achieved, improving the closing sealing performance of the electric valve. Since the lower valve plug and upper valve plug are detachably connected, and the upper valve plug and upper valve stem are detachably connected, after the electric valve has been used for a period of time, the operator can solve the sealing problem caused by the large wear of the valve plug by replacing the valve plug. Compared with the valve core with an integrated structure, this method has the advantages of simplicity, efficiency and cost saving. Through the setting of the lifting drive assembly, the lifting screw can be driven to move up and down during actual operation, thereby driving the valve core assembly to move up and down. In conjunction with the control transmission assembly and the stroke control assembly, the lifting distance of the valve core assembly can be precisely controlled, thereby automatically controlling the flow rate when the electric valve is in use.

[0008] Preferably, the assembly further includes an internal gearbox installed in the outer mounting box; the lifting drive assembly includes a motor bracket installed on the top of the internal gearbox, a drive motor and a transmission gear set meshing with the drive motor are mounted on the motor bracket; it also includes a worm gear rotatably connected to the internal gearbox, with a worm gear meshing with the transmission gear set at the outer end of the worm gear; and a turbine gear meshing with the worm gear is installed in the internal gearbox, with a threaded sleeve screwed into the turbine gear and meshing with the lifting screw.

[0009] Preferably, the lifting drive assembly further includes a handwheel shaft that extends laterally through the outer mounting box and is rotatably connected thereto. A second manual gear that meshes with a worm gear and a first manual gear that meshes with a transmission gear set are keyed to the handwheel shaft.

[0010] Preferably, the control transmission assembly includes a second control transmission shaft that runs longitudinally through and is rotatably connected to the inner gearbox, a stroke control assembly that is connected to the second control transmission shaft, and a first control transmission shaft that is rotatably connected to and laterally arranged within the inner gearbox and mounted on the outer mounting box; a third bevel gear is keyed to one end of the first control transmission shaft, and a fourth bevel gear that meshes with the third bevel gear is keyed to the second control transmission shaft; a second bevel gear is keyed to the other end of the first control transmission shaft, and a first bevel gear that meshes with the second bevel gear is keyed to a threaded sleeve.

[0011] Preferably, the stroke control assembly includes a control mounting bracket mounted on an internal gearbox, a potentiometer mounted on the control mounting bracket, a potentiometer gear mounted on the potentiometer, a stroke shaft passing through the control mounting bracket and connected to the output end of the control transmission assembly, a stroke gear meshing with the potentiometer gear keyed to the stroke shaft, a scale display dial fixed to the top of the stroke shaft, and a pointer mounted on the control mounting bracket for indicating the scale display dial.

[0012] Preferably, the lower valve seat includes a lower valve seat cylinder and an upper valve seat cylinder connected by a connecting rod, and an intermediate guide cylinder is fixedly connected to the center of the upper valve seat cylinder by a connecting rod; a lower valve stem is integrally formed at the bottom of the lower valve plug, and the lower valve stem passes through the lower valve seat cylinder and the upper valve seat cylinder.

[0013] Preferably, a cylindrical part is provided at the top of the upper valve plug, and a limiting protrusion passing through the cylindrical part is provided at the lower end of the upper valve stem. The upper valve stem and the upper valve plug are connected by a locking nut. The lower valve plug and the upper valve plug are connected by a bolt provided at the center. A sleeve is connected to the top of the upper valve stem by a mounting pin. The lower end of the lifting screw passes through the sleeve and is provided with a limiting block. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural schematic diagram of the present invention;

[0015] Figure 2 This is a cross-sectional structural diagram of the lower main body of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the valve core assembly in this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the lifting drive component in this utility model;

[0018] Figure 5 This is a cross-sectional structural diagram of the upper main body of this utility model;

[0019] Figure 6 This is a three-dimensional structural diagram of the stroke control component in this utility model.

[0020] In the diagram: 1. Outlet; 2. Lower valve seat; 2-1. Lower valve seat cylinder; 2-2. Upper valve seat cylinder; 2-3. Intermediate guide cylinder; 3. Upper valve seat; 4. Valve body structure; 4-1. Outlet elbow; 4-2. Flushing port; 4-3. T-shaped inlet pipe; 4-4. Inlet valve body; 4-5. Mounting support rod; 4-6. Valve body seat plate; 5. Valve core assembly; 5-1. Lower valve stem; 5-2. Lower valve plug; 5-3. Upper valve plug; 5-4. Upper valve stem; 5-5. Upper guide cover; 5-6. Mounting protective cylinder; 5-7. Upper end cover; 6. Lifting screw; 7. Internal gearbox; 8. External mounting box; 9. Lifting drive assembly; 9-1. Worm gear; 9-2. Manual gear one; 9-3. Manual... 9-4. Wheel and axle; 9-5. Manual gear 2; 9-6. Transmission gear set; 9-7. Motor bracket; 9-8. Drive motor; 9-9. Worm gear; 9-10. Screw sleeve; 10. Stroke control assembly; 10-1. Control mounting bracket; 10-2. Potentiometer gear; 10-3. Potentiometer; 10-4. Pointer; 10-5. Scale display dial; 10-6. Stroke shaft; 10-7. Stroke gear; 11. Observation window; 12. Control transmission assembly; 12-1. Bevel gear 1; 12-2. Bevel gear 2; 12-3. Control transmission shaft 1; 12-4. Bevel gear 3; 12-5. Bevel gear 4; 12-6. Control transmission shaft 2; 13. Water inlet. Detailed Implementation

[0021] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided in detail:

[0022] Please see Figure 1 The remote-controlled electric valve of this utility model includes an actuator device and a valve body device connected to each other.

[0023] like Figure 2 As shown, the valve body device described above includes a valve body structure 4 with an outlet 1 and an inlet 13, and a lower valve seat 2 and an upper valve seat 3 and a valve core assembly 5 that cooperates with the two are provided in the inner cavity of the valve body structure 4.

[0024] See further Figure 3 The valve core assembly 5 mentioned above includes an upper guide cover 5-5 installed at the top opening of the valve body structure 4, an upper valve stem 5-4 arranged longitudinally passing through the upper guide cover 5-5, an upper valve plug 5-3 detachably connected to the lower end of the upper valve stem 5-4 for controlling the opening and closing of the upper valve seat 3, and a lower valve plug 5-2 located below the upper valve seat 3 detachably connected to the upper valve plug 5-3 for controlling the opening and closing of the lower valve seat 2.

[0025] For ease of installation, a cylindrical portion is provided at the top of the upper valve plug 5-3, and a limiting protrusion passing through the cylindrical portion is provided at the lower end of the upper valve stem 5-4. The upper valve stem 5-4 and the upper valve plug 5-3 are connected by a lock nut. The lower valve seat 2 includes a lower valve seat cylinder 2-1 and an upper valve seat cylinder 2-2 connected by a connecting rod. An intermediate guide cylinder 2-3 is fixed to the center of the upper valve seat cylinder 2-2 by a connecting rod. The lower valve stem 5-1 is integrally formed at the bottom of the lower valve plug 5-2, and the lower valve stem 5-1 passes through the lower valve seat cylinder 2-1 and the upper valve seat cylinder 2-2. In addition, the upper openings of the lower valve seat 2 and the upper valve seat 3 are provided with chamfers that match the corresponding valve plugs. See further details. Figure 2 The lower valve plug 5-2 and the upper valve plug 5-3 mentioned above are connected by a bolt located at the center.

[0026] The valve core assembly 5 also includes a mounting protective sleeve 5-6 and an upper end cover 5-7 that are detachably mounted on the top of the upper guide cover 5-5; furthermore, a number of slots distributed circumferentially are provided at the upper end of the upper guide cover 5-5, and bolts with protrusions are inserted in each slot. The upper end cover 5-7 and the upper guide cover 5-5 are detachably connected by the bolts and locking nuts.

[0027] like Figure 2 As shown, the valve body structure 4 includes an inlet valve body 4-4 connected to the upper guide cover 5-5 at its top. Several mounting rods 4-5 are installed on the inlet valve body 4-4, and a valve body seat plate 4-6 is installed through the mounting rods 4-5. The valve body seat plate 4-6 is connected to the actuator device. A three-way inlet pipe 4-3 communicating with its inner cavity is installed on the outer wall of the inlet valve body 4-4. It also includes an outlet bend 4-1 installed at the lower port of the inlet valve body 4-4. The lower valve seat 2 is installed on the mating surface of the outlet bend 4-1 and the inlet valve body 4-4. A flushing port 4-2 corresponding to the lower valve rod 5-1 is opened at the bottom of the outlet bend 4-1, and a sealing head is provided on the flushing port 4-2.

[0028] like Figure 1 As shown, the actuator device includes an outer mounting box 8 connected to the valve body structure 4. A lifting screw 6, rotatably connected to the outer mounting box 8, is installed inside the outer mounting box 8. The lifting screw 6 is detachably connected to the upper valve stem 5-4. A sleeve is connected to the top of the upper valve stem 5-4 via a mounting pin. The lower end of the lifting screw 6 passes through the sleeve and is provided with a limit block. The lifting screw 6 is movably connected to the sleeve. Through the above configuration, a detachable connection between the lifting screw 6 and the valve body device can be achieved.

[0029] Additionally, a lifting drive assembly 9 for driving the lifting screw 6 to move up and down is provided inside the outer mounting box 8; a control transmission assembly 12 connected to the lifting drive assembly 9 is also provided inside the outer mounting box 8, and a stroke control assembly 10 connected to the control transmission assembly 12 is also included for controlling the opening and closing of the lifting drive assembly 9. A remote control structure and a power storage box are installed inside the outer mounting box 8. Furthermore, this embodiment also includes an internal gearbox 7 installed inside the outer mounting box 8.

[0030] See further Figure 4 The aforementioned lifting drive assembly 9 includes a motor bracket 9-6 mounted on the top of the inner gearbox 7, on which a drive motor 9-7 and a transmission gear set 9-5 meshing with the drive motor 9-7 are mounted; it also includes a worm gear 9-8 rotatably connected to the inner gearbox 7, with a worm gear 9-1 meshing with the transmission gear set 9-5 at the outer end of the worm gear 9-8; and a turbine 9-9 meshing with the worm gear 9-8, with a threaded sleeve 9-10 threadedly connected to the lifting screw 6 within the turbine 9-9. The threaded sleeve 9-10 is rotatably connected to the inner gearbox 7 via a rolling bearing, and a through hole is provided at the top of the inner gearbox 7 for the lifting screw 6 to pass through.

[0031] The aforementioned drive motor 9-7 is a helical gear shaft motor; the aforementioned transmission gear set 9-5 includes a rotating shaft one and a rotating shaft two rotatably connected and arranged in parallel on the motor bracket 9-6. A large gear and a small gear are keyed to both rotating shaft one and rotating shaft two. The large gear keyed to rotating shaft one meshes with the helical gear on the output shaft of drive motor 9-7. The large gear keyed to rotating shaft two meshes with the small gear keyed to rotating shaft one. The small gear keyed to rotating shaft two meshes with manual gear 9-2.

[0032] The lifting drive assembly 9 also includes a handwheel shaft 9-3 that extends laterally through and rotatably connects to the outer mounting box 8. A manual gear 9-4 meshing with a worm gear 9-1 and a manual gear 9-2 meshing with a transmission gear set 9-5 are keyed to the handwheel shaft 9-3. In actual operation, a handwheel can be installed on the outer end of the handwheel shaft 9-3 when needed. This configuration allows the handwheel to control the start of the electric valve, providing manual control. If remote control malfunctions, the valve can be manually closed, effectively increasing the safety of the electric valve.

[0033] In actual operation, the drive motor 9-7 starts, which drives the transmission gear set 9-5 that meshes with it to run, thereby driving the handwheel shaft 9-3 to rotate. Under the action of the handwheel shaft 9-3 and the manual gear 9-2 and manual gear 9-4 connected to it, the worm gear 9-8 can be driven to rotate, thereby driving the turbine 9-9 to rotate. The rotating turbine 9-9 can drive the screw sleeve 9-10 installed on it to rotate synchronously. Since the lifting screw 6 is screwed with the aforementioned screw sleeve 9-10, the purpose of driving the lifting screw 6 to move up and down can be achieved, thereby driving the valve core assembly 5 in the valve body device to move up and down, so as to achieve the purpose of opening and closing the valve body device.

[0034] See further Figure 5 The aforementioned control transmission assembly 12 includes a control transmission shaft 12-6 that runs longitudinally through and is rotatably connected to the inner gearbox 7. The stroke control assembly 10 is connected to the control transmission shaft 12-6. It also includes a control transmission shaft 12-3 that is rotatably connected to the outer mounting box 8 and is arranged laterally inside the inner gearbox 7. A bevel gear 12-4 is keyed to one end of the control transmission shaft 12-3. A bevel gear 12-5 that meshes with the bevel gear 12-4 is keyed to the control transmission shaft 12-6. A bevel gear 12-2 is keyed to the other end of the control transmission shaft 12-3. A bevel gear 12-1 that meshes with the bevel gear 12-2 is keyed to the threaded sleeve 9-10. In this embodiment, the teeth of the first bevel gear 12-1 are arranged downwards, and the teeth of the fourth bevel gear 12-5 are arranged upwards. The specifications and dimensions of the first bevel gear 12-1, the second bevel gear 12-2, the third bevel gear 12-4, and the fourth bevel gear 12-5 are the same.

[0035] See further Figure 6 The aforementioned stroke control assembly 10 includes a control mounting bracket 10-1 mounted on the inner gearbox 7, a potentiometer 10-3 mounted on the control mounting bracket 10-1, a potentiometer gear 10-2 mounted on the potentiometer 10-3, a stroke shaft 10-6 passing through the control mounting bracket 10-1 and connected to the control transmission shaft 12-6 in the control transmission assembly 12, a stroke gear 10-7 keyed to the stroke shaft 10-6 and meshing with the potentiometer gear 10-2, a scale display dial 10-5 fixedly attached to the top of the stroke shaft 10-6, and a pointer 10-4 mounted on the control mounting bracket 10-1 for indicating the scale display dial 10-5. A transparent observation window 11 is mounted on the top of the outer mounting box 8 for observing the scale display dial 10-5.

[0036] The working principle of the stroke control component 10 is as follows: the control transmission shaft 12-6 drives the stroke shaft 10-6 to rotate synchronously, which in turn drives the stroke gear 10-7 installed on the stroke shaft 10-6 to rotate synchronously, and at the same time drives the scale display 10-5 to rotate. In this way, the rotation angle of the lifting screw 6 can be directly read through the scale display 10-5 and the pointer 10-4. At the same time, while the stroke gear 10-7 is rotating, it drives the potentiometer gear 10-2 to rotate, and the potentiometer gear 10-2 drives the potentiometer 10-3 to operate. In this way, the operation of the drive motor 9-7 can be controlled through the potentiometer 10-3. In the actual working process, the rotation angle of the screw sleeve 9-10 can be converted into the lifting distance of the lifting screw 6. The lifting distance of the lifting screw 6 can then be controlled by the stroke control component 10 to control the opening size of the upper valve seat 3 and the lower valve seat 2, and the result is displayed on the scale display 10-5 to achieve the purpose of flow control.

[0037] Furthermore, in this embodiment, the aforementioned remote control structure includes a control box with control buttons installed inside the outer mounting box 8. The control box contains a central controller, a signal transmitter, a signal receiver, and a signal amplifier. The central controller is connected to the signal transmitter and receiver. Installing the central controller simplifies the control device. The signal transmitter and receiver enable the central controller to remotely operate the device. The signal amplifier further strengthens the control signal, preventing errors during remote operation. Remote control reduces manual labor, and offers rapid and stable operation. Additionally, a connecting cable is installed on the drive motor 9-7, connecting the central controller to the drive motor 9-7. When remotely controlled, the operator can effectively control the switching of the drive motor 9-7, thereby controlling the valve's opening and closing, and also controlling the rotation speed of the drive motor 9-7, effectively improving the device's functionality.

[0038] This invention is applicable to water distribution pipelines where flow and pressure need to be controlled. It maintains a predetermined flow rate, limits excessive flow to a predetermined value, and appropriately reduces upstream high pressure. Even if the pressure upstream of the main valve changes, it will not affect the flow rate downstream of the main valve. Connection methods include flange, threaded, and welded types. Control and adjustment methods include automatic and manual.

[0039] Working principle:

[0040] This utility model is applicable to water distribution pipes where flow and pressure need to be controlled. When needed, the drive motor 9-7 can be started manually or automatically to drive the transmission gear set 9-5 that meshes with it. Under the action of the handwheel shaft 9-3 and the manual gear 9-2 and manual gear 9-4 connected to it, the worm gear 9-8 can be rotated, which in turn drives the turbine 9-9 and the screw sleeve 9-10 installed on it to rotate synchronously, thereby driving the lifting screw 6 to move up and down, and then driving the valve core assembly 5 in the valve body device to move up and down, so as to achieve the purpose of opening and closing the valve body device.

[0041] The rotating sleeve 9-10 can drive the bevel gear 12-1 mounted on it to rotate. Under the action of bevel gear 2 12-2, control transmission shaft 12-3, bevel gear 3 12-4 and bevel gear 4 12-5, control transmission shaft 2 12-6 can rotate synchronously with sleeve 9-10, and drive the stroke control assembly 10 to rotate synchronously. Then, the potentiometer 10-3 controls the operation of drive motor 9-7. The rotation angle of sleeve 9-10 can be converted into the lifting distance of lifting screw 6. Then, the lifting distance of lifting screw 6 is controlled by stroke control assembly 10 to control the opening size of upper valve seat 3 and lower valve seat 2, so as to achieve the purpose of controlling flow.

Claims

1. A remotely controlled electric valve, characterized in that: The device includes an actuator and a valve body assembly connected together. The valve body assembly includes a valve body structure (4) with an outlet (1) and an inlet (13). A lower valve seat (2) and an upper valve seat (3) are provided in the inner cavity of the valve body structure (4), and a valve core assembly (5) that cooperates with the two. The valve core assembly (5) includes an upper guide cover (5-5) installed at the top opening of the valve body structure (4). An upper valve stem (5-4) is longitudinally arranged inside the upper guide cover (5-5). An upper valve plug (5-3) is detachably connected to the lower end of the upper valve stem (5-4) for controlling the opening and closing of the upper valve seat (3). A valve plug located on the upper valve seat (3) is detachably connected to the upper valve plug (5-3). The lower valve plug (5-2) is used to control the opening and closing of the lower valve seat (2); the actuator device includes an outer mounting box (8) connected to the valve body structure (4), a lifting screw (6) rotatably connected to the outer mounting box (8) is provided inside the outer mounting box (8), and the lifting screw (6) is detachably connected to the upper valve stem (5-4); a lifting drive assembly (9) for driving the lifting screw (6) to move up and down is provided inside the outer mounting box (8); a control transmission assembly (12) connected to the lifting drive assembly (9) is provided inside the outer mounting box (8), and a stroke control assembly (10) connected to the control transmission assembly (12) is also provided for controlling the opening and closing of the lifting drive assembly (9).

2. The remote-controlled electric valve as described in claim 1, characterized in that: It also includes an internal gearbox (7) installed in the outer mounting box (8), and a lifting drive assembly (9) including a motor bracket (9-6) installed on the top of the internal gearbox (7), a drive motor (9-7) and a transmission gear set (9-5) meshing with the drive motor (9-7) are installed on the motor bracket (9-6); it also includes a worm (9-8) provided in the internal gearbox (7) and rotatably connected thereto, and a worm gear (9-1) meshing with the transmission gear set (9-5) is keyed to the outer end of the worm (9-8); it also includes a turbine (9-9) provided in the internal gearbox (7) and meshing with the worm (9-8), and a screw sleeve (9-10) keyed to the turbine (9-9) and screwed with the lifting screw (6).

3. The remote-controlled electric valve as described in claim 2, characterized in that: The lifting drive assembly (9) also includes a handwheel shaft (9-3) that extends laterally through the outer mounting box (8) and is rotatably connected thereto. A manual gear two (9-4) that meshes with the worm gear (9-1) and a manual gear one (9-2) that meshes with the transmission gear set (9-5) are keyed to the handwheel shaft (9-3).

4. The remote-controlled electric valve as described in claim 3, characterized in that: The control transmission assembly (12) includes a control transmission shaft two (12-6) that runs longitudinally through the inner gearbox (7) and is rotatably connected thereto. The stroke control assembly (10) is connected to the control transmission shaft two (12-6). It also includes a control transmission shaft one (12-3) that is rotatably connected to the outer mounting box (8) and is arranged laterally inside the inner gearbox (7). A bevel gear three (12-4) is keyed to one end of the control transmission shaft one (12-3). A bevel gear four (12-5) that meshes with the bevel gear three (12-4) is keyed to the control transmission shaft two (12-6). A bevel gear two (12-2) is keyed to the other end of the control transmission shaft one (12-3). A bevel gear one (12-1) that meshes with the bevel gear two (12-2) is keyed to the threaded sleeve (9-10).

5. The remote-controlled electric valve as described in claim 1, characterized in that: The stroke control assembly (10) includes a control mounting bracket (10-1) mounted on an inner gearbox (7), a potentiometer (10-3) mounted on the control mounting bracket (10-1), a potentiometer gear (10-2) mounted on the potentiometer (10-3), a stroke shaft (10-6) passing through the control mounting bracket (10-1) and connected to the output end of the control transmission assembly (12), a stroke gear (10-7) meshing with the potentiometer gear (10-2) keyed to the stroke shaft (10-6), a scale display disk (10-5) fixedly attached to the top of the stroke shaft (10-6), and a pointer (10-4) mounted on the control mounting bracket (10-1) for indicating the scale display disk (10-5).

6. The remote-controlled electric valve as described in claim 1, characterized in that: The lower valve seat (2) includes a lower valve seat cylinder (2-1) and an upper valve seat cylinder (2-2) connected by a connecting rod. An intermediate guide cylinder (2-3) is fixedly connected to the center of the upper valve seat cylinder (2-2) by a connecting rod. A lower valve stem (5-1) is integrally formed at the bottom of the lower valve plug (5-2). The lower valve stem (5-1) passes through the lower valve seat cylinder (2-1) and the upper valve seat cylinder (2-2).

7. The remote-controlled electric valve as described in claim 1, characterized in that: in The upper valve plug (5-3) has a cylindrical part at its top, and a limiting protrusion is provided at the lower end of the upper valve stem (5-4) through the cylindrical part. The upper valve stem (5-4) and the upper valve plug (5-3) are connected by a locking nut. The lower valve plug (5-2) and the upper valve plug (5-3) are connected by a bolt provided at the center. A sleeve is connected to the top of the upper valve stem (5-4) by a mounting pin. The lower end of the lifting screw (6) is inserted into the sleeve and a limiting block is provided.

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