An actuator for fast shut-off valves

Abstract

The application provides an actuator for quickly closing a valve, which has the characteristics that the actuator comprises a mounting unit, a power unit, an electromagnetic clutch unit, a transmission unit and an execution unit; the mounting unit comprises a truss and a stand; the truss comprises two vertical plates and a horizontal plate; the two vertical plates are symmetrically arranged at the upper end of the horizontal plate; the stand is vertically arranged at the middle part of the upper end of the horizontal plate; the power unit comprises a motor gear box; the motor gear box is arranged on one of the two vertical plates and is used for providing a power source; the electromagnetic clutch unit comprises two electromagnetic clutch bearings and an electromagnetic clutch shell; the two electromagnetic clutch bearings are respectively arranged at the lower end of the middle part of the two vertical plates; the inner wall of each of the two electromagnetic clutch bearings is fixedly connected with an electromagnetic clutch shaft; the electromagnetic clutch shell is arranged on the vertical plate of the two vertical plates which is close to the motor gear box; and an electromagnetic clutch electromagnetic coil is wound in the electromagnetic clutch shell.

Description

Technical Field

[0001] This invention relates to the field of quick-closing valve technology, and more specifically to an actuator for quickly shutting off a valve. Background Technology

[0002] Quick-cut valves are key safety devices in industrial combustion systems. Their core function is to quickly cut off the fuel supply in emergencies to prevent safety accidents such as explosions and fires caused by fuel leaks.

[0003] Currently, existing quick-closing valve actuators are mainly classified into the following categories: First, electromagnetic actuators, which have a simple structure and rapid action, but low output torque, and are usually only suitable for small-diameter, low-pressure clean environments, limiting their application range; Second, pneumatic actuators, which have high output force, mature technology, and are widely used, but require additional air compressors, dryers, and other air source processing equipment, resulting in complex systems, large footprints, and high initial investment and maintenance costs; Third, electro-hydraulic combined actuators, which can provide greater driving force, but have complex system structures, high sealing requirements, high maintenance costs, and their performance is significantly affected by the working medium pressure, making them difficult to directly apply to high-pressure gas pipelines.

[0004] Therefore, how to realize a quick-closing valve actuator with a simple and compact structure, no need for complex external auxiliary systems, large output torque, fast shut-off speed, and no limitation by pipeline medium pressure has become a key problem that urgently needs to be solved. Summary of the Invention

[0005] This invention was made to solve the above-mentioned problems, and its purpose is to provide an actuator for quickly shutting off valves.

[0006] This invention provides an actuator for a fast-closing valve, characterized by comprising: a mounting unit, a power unit, an electromagnetic clutch unit, a transmission unit, and an execution unit.

[0007] The installation unit includes a truss and a column. The truss includes two vertical plates and one horizontal plate. The two vertical plates are symmetrically arranged at the upper end of the horizontal plate, and the column is vertically arranged at the middle of the upper end of the horizontal plate.

[0008] The power unit includes a motor gearbox, which is mounted on one of the two vertical plates to provide a power source;

[0009] The electromagnetic clutch unit includes two electromagnetic clutch bearings and an electromagnetic clutch housing. The two electromagnetic clutch bearings are respectively located at the lower end of the middle of two vertical plates. An electromagnetic clutch shaft is fixedly connected to the inner wall of each electromagnetic clutch bearing. The electromagnetic clutch housing is located on one of the two vertical plates near the motor gearbox. An electromagnetic clutch electromagnetic coil is wound inside the electromagnetic clutch housing to generate an electromagnetic field when energized. An electromagnetic clutch rotor is rotatably mounted in the middle of the electromagnetic clutch housing. An electromagnetic clutch driven end gear is rotatably connected to the middle of the electromagnetic clutch shaft.

[0010] The transmission unit includes two large gear shaft bearings and a support bearing. The two large gear shaft bearings are respectively located at the upper end of the middle of the two vertical plates. Large gear shafts are fixedly connected to the inner walls of the two large gear shaft bearings. The side of the large gear shaft away from the motor gearbox is fixedly connected to the inner wall of the support bearing. A large gear is fixedly connected to the outer wall of the support bearing. The large gear meshes with the driven gear of the electromagnetic clutch. A second transmission gear is located on the side of the large gear shaft close to the support bearing.

[0011] The actuator includes a rack and pinion retainer, a valve stem, and an actuator switch. The rack and pinion retainer slides on the outer wall of the column. A rack is provided on the outer wall of the rack and pinion retainer near the second transmission gear. The rack meshes with the second transmission gear. The upper end of the valve stem is located on the side of the rack and pinion retainer away from the rack. A spring cap is provided on the upper end of the outer wall of the valve stem. A return spring is sleeved on the outside of the valve stem. The lower end of the valve stem passes through the horizontal plate to the lower end of the horizontal plate and is provided with a valve plate, which is used to cut off the fluid in the valve. The actuator switch includes an open position limit switch and a closed position limit switch, which are used to control the opening and closing of the valve.

[0012] The actuator for a quick-closing valve provided by the present invention may also have the following feature: a first transmission gear is provided on the side of the electromagnetic clutch shaft near the motor gearbox, and the first transmission gear is meshed with the power output gear of the motor gearbox.

[0013] In the actuator of the fast shut-off valve provided by the present invention, it may also have the following feature: wherein the electromagnetic clutch housing is disposed in the middle of the outer wall of the vertical plate away from the motor gearbox, and the inner wall of the electromagnetic clutch rotor is fixedly connected to the electromagnetic clutch shaft, so as to make the electromagnetic clutch rotor an electromagnet.

[0014] In the actuator of the fast shut-off valve provided by the present invention, there may also be the following feature: an electromagnetic clutch friction plate is provided on the side of the driven end gear of the electromagnetic clutch near the motor gearbox. The electromagnetic clutch friction plate is used to be attracted by the electromagnetic clutch rotor, so that the electromagnetic clutch rotor drives the electromagnetic clutch friction plate and the driven end gear of the electromagnetic clutch to rotate.

[0015] The actuator of the quick-closing valve provided by the present invention may also have the following feature: a one-way bearing is fixedly connected to the side of the inner wall of the large gear away from the supporting bearing, the inner wall of the one-way bearing is fixedly connected to the shaft of the large gear, and the one-way bearing is used to make the large gear rotate only counterclockwise relative to the motor gearbox.

[0016] The actuator for a quick-closing valve provided by the present invention may also have the following feature: the upper ends of both vertical plates are provided with rack cover plates, which are used to limit the movement height of the rack retainer.

[0017] The actuator of the quick-closing valve provided by the present invention may also have the following features: the lower end of the spring cover is fixedly connected to the upper end of the return spring, and the lower end of the return spring is fixedly connected to the upper end of the horizontal plate, so as to compress the return spring with the spring cover to generate deformation and store elastic potential energy, and release the elastic potential energy when the return spring recovers.

[0018] The actuator for a quick-closing valve provided by the present invention may also have the following features: the actuator switch is disposed on one of the two vertical plates near the motor gearbox, and the open position limit switch and the closed position limit switch are respectively disposed at the lower end and the upper end of the outer wall of the side of the vertical plate near the motor gearbox.

[0019] The actuator for a quick-closing valve provided by the present invention may also have the following feature: a valve position push rod is provided in the middle of the outer wall of the rack and pinion cage near the motor gearbox. The valve position push rod is used to trigger the open position limit switch and the close position limit switch to control the opening and closing of the valve.

[0020] The role and effect of invention

[0021] According to the actuator of the fast shut-off valve of the present invention, the motor gearbox is used as the power source, and multiple gears are arranged in the device to enable the actuator to obtain a higher torque than the existing electromagnetic actuator, thus solving the problem that the existing electromagnetic actuator cannot drive large-diameter, high-pressure pipeline valves.

[0022] The actuator of the fast shut-off valve involved in this invention uses multiple gears, racks and pinions and an electromagnetic clutch unit as the core power transmission structure, which makes the actuator simple and compact, without the need for a complex external auxiliary system, and is not limited by the pressure of the pipeline medium. Attached Figure Description

[0023] Figure 1 This is a first-person view of the main structure of the actuator for quickly shutting off the valve.

[0024] Figure 2This is a second-view schematic diagram of the main structure of the actuator for quickly shutting off the valve;

[0025] Figure 3 It is a cross-sectional view of the actuator of the fast-closing valve along the axis of the electromagnetic clutch shaft;

[0026] Figure 4 It is a front sectional view of the large gear shaft, large gear, support bearing, one-way bearing, and second transmission gear of the actuator of the fast shut-off valve. Detailed Implementation

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the actuator of a fast shut-off valve of the present invention.

[0029] Figure 1 This is a first-person view schematic diagram of the main structure of the actuator for quickly shutting off the valve.

[0030] Figure 2 This is a second-view schematic diagram of the main structure of the actuator for quickly shutting off the valve.

[0031] like Figure 1 , 2 As shown, the actuator 100 of the quick-closing valve in this embodiment includes: an installation unit 10, a power unit 20, an electromagnetic clutch unit 30, a transmission unit 40, and an execution unit 50.

[0032] Figure 3 This is a cross-sectional view of the actuator of the fast-closing valve along the axis of the electromagnetic clutch shaft 32.

[0033] like Figure 1 , Figure 3 As shown, the installation unit 10 includes a truss 11 and a column 12. The truss 11 includes two vertical plates 111 and a horizontal plate 112. The two vertical plates 111 are symmetrically arranged at the upper end of the horizontal plate 112. The column 12 is vertically arranged at the middle of the upper end of the horizontal plate 112 to provide stable support for the actuator and ensure that the various components work together.

[0034] like Figure 1 As shown, the power unit 20 includes a motor gearbox 21, which is disposed on one of the two vertical plates 111 and is used to provide a power source for the actuator.

[0035] Figure 4 This is a front sectional view of the large gear shaft 42, large gear 43, support bearing 44, one-way bearing 45, and second transmission gear 46 of the actuator of the quick-closing valve.

[0036] like Figure 2 , 3 As shown in Figure 4, the electromagnetic clutch unit 30 includes two electromagnetic clutch bearings 31 and an electromagnetic clutch housing 33. The two electromagnetic clutch bearings 31 are respectively located at the lower end of the middle of the two vertical plates 111. The inner walls of the two electromagnetic clutch bearings 31 are fixedly connected to electromagnetic clutch shafts 32. A first transmission gear 38 is provided on the side of the electromagnetic clutch shaft 32 near the motor gearbox 21. The first transmission gear 38 meshes with the power output gear of the motor gearbox 21.

[0037] The electromagnetic clutch housing 33 is disposed on one of the two vertical plates 111, which is closer to the motor gearbox 21. The electromagnetic clutch housing 33 is disposed in the middle of the outer wall of the side of the vertical plate 111 away from the motor gearbox 21. The inner wall of the electromagnetic clutch rotor 35 is fixedly connected to the electromagnetic clutch shaft 32 to make the electromagnetic clutch rotor 35 an electromagnet.

[0038] An electromagnetic clutch coil 34 is wound inside the electromagnetic clutch housing 33 to generate an electromagnetic field when energized. An electromagnetic clutch rotor 35 is rotatably mounted in the middle of the electromagnetic clutch housing 33. An electromagnetic clutch driven gear 37 is rotatably connected in the middle of the electromagnetic clutch shaft 32. An electromagnetic clutch friction plate 36 is provided on the side of the electromagnetic clutch driven gear 37 near the motor gearbox 21. The electromagnetic clutch friction plate 36 is attracted by the electromagnetic clutch rotor 35, causing the electromagnetic clutch rotor 35 to drive the electromagnetic clutch friction plate 36 and the electromagnetic clutch driven gear 37 to rotate. In this embodiment, the electromagnetic clutch housing 33 is fixed to the middle of the outer wall of the vertical plate 111 away from the motor gearbox 21 by fastening bolts. There is space between the electromagnetic clutch housing 33 and the vertical plate 111 for the transmission between the power output gear of the motor gearbox 21 and the electromagnetic clutch driven gear 37. The electromagnetic clutch friction plate 36 is an elastic structure and can deform along the axial direction of the electromagnetic clutch shaft 32, so that the electromagnetic clutch friction plate 36 can be attracted by the electromagnetic clutch rotor 35.

[0039] like Figure 2 , 3As shown in Figure 4, the transmission unit 40 includes two large gear shaft bearings 41 and a support bearing 44. The two large gear shaft bearings 41 are respectively located at the upper end of the middle of the two vertical plates 111. Large gear shafts 42 are fixedly connected to the inner walls of the two large gear shaft bearings 41. The side of the large gear shaft 42 away from the motor gearbox 21 is fixedly connected to the inner wall of the support bearing 44. A large gear 43 is fixedly connected to the outer wall of the support bearing 44. The large gear 43 meshes with the driven end gear 37 of the electromagnetic clutch. A second transmission gear 46 is provided on the side of the large gear shaft 42 near the support bearing 44. A one-way bearing 45 is fixedly connected to the inner wall of the large gear 43 away from the support bearing 44. The inner wall of the one-way bearing 45 is fixedly connected to the large gear shaft 42. The one-way bearing 45 is used to make the large gear 43 rotate counterclockwise relative to the motor gearbox 21.

[0040] like Figure 1 , 2 As shown in Figure 3, the execution unit 50 includes a rack and pinion retainer 52, a valve stem 56, and an execution switch 59. The rack and pinion retainer 52 slides on the outer wall of the column 12. A rack 51 is provided on the outer wall of the rack and pinion retainer 52 near the second transmission gear 46. The rack 51 is meshed with the second transmission gear 46. The upper end of the valve stem 56 is provided on the side of the rack and pinion retainer 52 away from the rack 51. A spring cover 55 is provided on the upper end of the outer wall of the valve stem 56. A return spring 54 is sleeved on the outside of the valve stem 56. The lower end of the spring cover 55 is fixedly connected to the upper end of the return spring 54. The lower end of the return spring 54 is fixedly connected to the upper end of the horizontal plate 112. The spring cover 55 is used to compress the return spring 54 to generate deformation and store elastic potential energy. When the return spring 54 recovers, the elastic potential energy is released.

[0041] The lower end of the valve stem 56 passes through the horizontal plate 112 to the lower end of the horizontal plate 112 and is provided with a valve plate 57, which is used to cut off the fluid in the valve. The actuator switch 59 includes an open position limit switch 591 and a closed position limit switch 592, which are used to control the opening and closing of the valve. The upper ends of the two vertical plates 111 are provided with rack cover plates 53, which are used to limit the movement height of the rack retainer 52. The actuator switch 59 is provided on one of the two vertical plates 111 that is closer to the motor gearbox 21. The open position limit switch 591 and the closed position limit switch 592 are respectively provided at the lower end and the upper end of the outer wall of the side of the vertical plate 111 that is closer to the motor gearbox 21. A valve position push rod 58 is provided in the middle of the outer wall of the side of the rack retainer 52 that is closer to the motor gearbox 21. The valve position push rod 58 is used to trigger the open position limit switch 591 and the closed position limit switch 592 to control the opening and closing of the valve. In this embodiment, the rack retainer 52 is generally L-shaped. The upper end of the valve stem 56 is fixed to the short side of the rack retainer 52 away from the rack 51 by fastening bolts. The upper end of the spring cover 55 is attached to the lower end of the short side of the rack retainer 52. The rack cover plate 53 is fixedly connected to the two vertical plates 111 by multiple fastening bolts, thereby limiting the height of the rack retainer 52 when the return spring 54 rebounds and drives the rack retainer 52 to move upward.

[0042] The valve opening and closing processes of the actuator 100 of the fast-closing valve in this embodiment are as follows (all processes are relative to the motor gearbox 21):

[0043] Valve opening process:

[0044] S1. The actuator 100 of the quick-closing valve receives the valve opening signal, the motor gearbox 21 is energized, and the power output gear of the motor gearbox 21 starts to rotate clockwise. At the same time, the electromagnetic clutch unit 30 is energized, and the electromagnetic clutch rotor 35 attracts the friction plate of the electromagnetic clutch.

[0045] S2. The power output gear of the motor gearbox 21 drives the first transmission gear 38 meshing with it to start rotating counterclockwise, so that the first transmission gear 38 drives the electromagnetic clutch rotor 35, the electromagnetic clutch driven end gear 37 and the electromagnetic clutch friction plate 36 fixed on it to rotate counterclockwise together.

[0046] S3. At the same time, the driven gear 37 of the electromagnetic clutch drives the large gear 43 meshing with it to start rotating clockwise. Since the one-way bearing 45 can only rotate counterclockwise, the large gear 43 drives the large gear shaft 42 to rotate, and the large gear shaft 42 drives the second transmission gear 46 to rotate clockwise synchronously.

[0047] S5. The clockwise rotation of the second transmission gear 46 drives the rack and rack holder 52 meshing with it to move downward, which in turn causes the rack 51 to drive the spring cover 55, valve stem 56 and valve plate 57 to move downward, and causes the spring cover 55 to compress the return spring 54, thereby realizing the valve opening action.

[0048] S6. The rack and pinion retainer 52 continues to move downward until the valve position push rod 58 triggers the open position limit switch 591. At this time, the motor gearbox 21 is de-energized, and the power output gear of the motor gearbox 21 stops rotating. At this time, the electromagnetic clutch unit 30 remains energized, and the electromagnetic clutch friction plate 36 and the electromagnetic clutch rotor 35 remain engaged. Under the meshing of the gears at each stage and the locking action of the motor gearbox 21, the valve remains open, and the return spring 54 is in a compressed and stored state.

[0049] Valve closing process:

[0050] S1. When the actuator 100 of the quick-closing valve receives the valve closing signal, the electromagnetic clutch unit 30 is de-energized, and the electromagnetic clutch friction plate 36 is separated from the electromagnetic clutch rotor 35. At this time, the large gear 43, the driven end gear 37 of the electromagnetic clutch, and the electromagnetic clutch friction plate 36 can rotate freely on the electromagnetic clutch shaft 32.

[0051] S2. The return spring 54, which is in a compressed and stored energy state, rebounds and releases its elastic potential energy, causing the rack 51 and rack retainer 52 to move upward. The rack 51 drives the second transmission gear 46, which meshes with it, to rotate counterclockwise.

[0052] S3. The second transmission gear 46 drives the large gear 43, which is coaxial with it, to rotate counterclockwise;

[0053] S4. The large gear 43 drives the driven end gear 37 of the electromagnetic clutch to rotate clockwise. Since the electromagnetic clutch friction plate 36 was previously separated from the electromagnetic clutch rotor 35, the driven end gear 37 of the electromagnetic clutch and the electromagnetic clutch friction plate 36 rotate clockwise synchronously at this time.

[0054] S5. When the valve plate 57 returns to its seat position, the valve position push rod 58 touches the closed position limit switch 592, and sends a feedback signal that the valve is closed.

[0055] S6. Valve plate 57, valve stem 56, rack 51 and rack retainer 52 stop momentarily, rack cover plate 53 contacts rack retainer 52, and the second transmission gear 46 meshing with rack 51 stops rotating;

[0056] S7. The large gear 43, which is coaxial with the second transmission gear 46 and has a one-way bearing 45, rotates counterclockwise at high speed under the action of inertia, driving the driven end gear 37 of the electromagnetic clutch that meshes with it to rotate at high speed until the inertia disappears, and the large gear 43 and the driven end gear 37 of the electromagnetic clutch stop rotating.

[0057] The role and effect of the embodiments

[0058] According to the actuator of the fast shut-off valve involved in this embodiment, by using a motor gearbox in conjunction with multiple gears as a power source, the opening torque is higher than that of the existing electromagnetic mechanism, thus solving the problem that the existing electromagnetic mechanism cannot drive large-diameter, high-pressure pipeline valves.

[0059] Furthermore, by employing multiple gear, rack, and electromagnetic clutch units as the core power transmission structure, the complex hydraulic system in the existing electro-hydraulic combined actuator is replaced, making the actuator simple and compact in structure, eliminating the need for complex external auxiliary systems, and achieving the technical effects of simplifying system structure, reducing failure rate, and facilitating maintenance, and is not limited by pipeline medium pressure.

[0060] Furthermore, by using a motor gearbox drive and a return spring for energy storage, an external air source is eliminated, thus solving the problems of existing pneumatic actuators requiring auxiliary equipment such as air compressors and dryers, resulting in complex systems, large footprints, and high initial investment and maintenance costs.

[0061] Furthermore, by using the smooth drive of the motor gearbox, the instantaneous engagement and disengagement of the electromagnetic clutch friction plate and the electromagnetic clutch rotor, and the rapid energy release of the return spring, the efficiency of valve opening and closing is improved.

[0062] Furthermore, by using a one-way bearing, the impact of the high-speed reverse rotation of the large gear on the transmission unit and the driven gear of the electromagnetic clutch during valve closing is solved, achieving the effect of absorbing inertia and improving the service life of the overall fast-closing valve actuator.

[0063] Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to this invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An actuator for a quick-closing valve, characterized in that include: The unit comprises an installation unit, a power unit, an electromagnetic clutch unit, a transmission unit, and an actuator unit. The installation unit includes a truss and a column. The truss includes two vertical plates and one horizontal plate. The two vertical plates are symmetrically arranged at the upper end of the horizontal plate, and the column is vertically arranged at the middle of the upper end of the horizontal plate. The power unit includes a motor gearbox, which is disposed on one of the two vertical plates and is used to provide a power source. The electromagnetic clutch unit includes two electromagnetic clutch bearings and an electromagnetic clutch housing. The two electromagnetic clutch bearings are respectively disposed at the lower end of the middle of the two vertical plates. An electromagnetic clutch shaft is fixedly connected to the inner wall of each of the two electromagnetic clutch bearings. The electromagnetic clutch housing is disposed on one of the two vertical plates near the motor gearbox. An electromagnetic clutch electromagnetic coil is wound inside the electromagnetic clutch housing for generating an electromagnetic field when energized. An electromagnetic clutch rotor is rotatably disposed in the middle of the electromagnetic clutch housing. An electromagnetic clutch driven gear is rotatably connected to the middle of the electromagnetic clutch shaft. The transmission unit includes two large gear shaft bearings and a support bearing. The two large gear shaft bearings are respectively located at the upper end of the middle of the two vertical plates. Large gear shafts are fixedly connected to the inner walls of the two large gear shaft bearings. The side of the large gear shaft away from the motor gearbox is fixedly connected to the inner wall of the support bearing. A large gear is fixedly connected to the outer wall of the support bearing. The large gear meshes with the driven gear of the electromagnetic clutch. A second transmission gear is provided on the side of the large gear shaft close to the support bearing. The actuator includes a rack and pinion retainer, a valve stem, and an actuator switch. The rack and pinion retainer slides on the outer wall of the column. A rack is provided on the outer wall of the rack and pinion retainer near the second transmission gear. The rack meshes with the second transmission gear. The upper end of the valve stem is located on the side of the rack and pinion retainer away from the rack. A spring cap is provided on the upper end of the outer wall of the valve stem. A return spring is sleeved on the outside of the valve stem. The lower end of the valve stem passes through the horizontal plate to the lower end of the horizontal plate and is provided with a valve plate, which is used to cut off the fluid in the valve. The actuator switch includes an open position limit switch and a closed position limit switch, which are used to control the opening and closing of the valve.

2. The actuator for the rapid shut-off valve according to claim 1, characterized in that: in, The electromagnetic clutch shaft is provided with a first transmission gear on the side near the motor gearbox, and the first transmission gear is meshed with the power output gear of the motor gearbox.

3. The actuator for the rapid shut-off valve according to claim 2, characterized in that: in, The electromagnetic clutch housing is located in the middle of the outer wall of the vertical plate away from the motor gearbox, and the inner wall of the electromagnetic clutch rotor is fixedly connected to the electromagnetic clutch shaft to make the electromagnetic clutch rotor an electromagnet.

4. The actuator for the rapid shut-off valve according to claim 3, characterized in that: in, An electromagnetic clutch friction plate is provided on the side of the driven gear of the electromagnetic clutch near the motor gearbox. The electromagnetic clutch friction plate is used to be attracted by the electromagnetic clutch rotor, so that the electromagnetic clutch rotor drives the electromagnetic clutch friction plate and the driven gear of the electromagnetic clutch to rotate.

5. The actuator for the quick-closing valve according to claim 1, characterized in that: in, A one-way bearing is fixedly connected to the inner wall of the large gear on the side away from the supporting bearing. The inner wall of the one-way bearing is fixedly connected to the shaft of the large gear. The one-way bearing is used to ensure that the large gear can only rotate counterclockwise relative to the motor gearbox.

6. The actuator for the fast-closing valve according to claim 1, characterized in that: in, Both vertical plates are provided with rack cover plates at their upper ends, which are used to limit the movement height of the rack retainer.

7. The actuator for the quick-closing valve according to claim 6, characterized in that: in, The lower end of the spring cover is fixedly connected to the upper end of the reset spring, and the lower end of the reset spring is fixedly connected to the upper end of the horizontal plate. This is used to compress the reset spring with the spring cover to generate deformation and store elastic potential energy, and to release the elastic potential energy when the reset spring returns to its original state.

8. The actuator for the quick-closing valve according to claim 7, characterized in that: in, The actuator switch is disposed on one of the two vertical plates near the motor gearbox. The open position limit switch and the closed position limit switch are respectively disposed on the lower end and the upper end of the outer wall of the side of the vertical plate near the motor gearbox.

9. The actuator for the quick-closing valve according to claim 8, characterized in that: in, A valve position push rod is provided in the middle of the outer wall of the rack and pinion cage near the motor gearbox. The valve position push rod is used to trigger the open position limit switch and the close position limit switch to control the opening and closing of the valve.

Images