Gate valve driving executing mechanism

Abstract

The invention discloses a gate valve driving actuating mechanism, which relates to the technical field of gate valves, and comprises an actuator shell, two ends of a worm are respectively provided with a first transmission piece and a second transmission piece, the outer surface of the first transmission piece is provided with a first transmission groove matched with a first connecting piece, and a second spring is connected between the first connecting piece and the actuator shell; a first spring is connected between the rotary extrusion device and the second connecting piece, an oil outlet pipe extending into the actuator shell is arranged outside the oil storage tank, and a pressing type valve is arranged on the oil outlet pipe. The purpose of automatic switching between an electric mode and a manual mode of the executing mechanism can be achieved, transmission can be more reliable through an embedding mode, the reliability of the executing mechanism is effectively improved, and the service life of the executing mechanism is effectively prolonged; and the purpose of automatically filling the lubricating oil into corresponding parts inside the executing mechanism while the executing mechanism is manually operated can be achieved, so that the lubricating oil is filled more timely.

Description

Technical Field

[0001] The invention relates to the technical field of gate valves, in particular to a gate valve driving actuator. Background Art

[0002] The gate valve is a common opening and closing valve. It uses the gate valve plate to connect or cut off the medium in the pipeline, so it is called a gate valve. When the valve plate is adjusted to the open position, the fluid can pass through the channel freely. The valve plate is usually operated together with the valve stem. The gate valve actuators on the market are more common in manual, electric, manual and electric combined, and pneumatic control actuators. Among them, the manual and electric combined actuators are equipped with a clutch device, which can be manually adjusted according to actual use requirements to select the valve execution mode (manual or electric).

[0003] The prior art CN117927725A discloses a valve actuator, which includes a housing, a power unit, an output end, a manual mechanism, a hand wheel, a friction wheel, a pressure plate assembly and other components. Although the valve actuator can simplify the operation of the manual mode, improve efficiency, and meet the use requirements of the manual mode in emergency situations, the actuator realizes torque transmission through the friction force between the friction wheels. Although this friction transmission method is simple and easy to implement, it is not reliable enough for torque transmission, and the torque that can be transmitted is small. Especially when a larger torque transmission is required, relative sliding is likely to occur between the friction wheels, causing transmission failure, affecting the normal opening and closing of the valve, and after multiple frictions, it will also affect the service life of the friction wheels, resulting in low reliability and service life of the actuator. In addition, in order to ensure the normal transmission of its internal components, the actuator and the traditional gate valve actuator need to ensure that there is sufficient lubrication performance between the valve stem and the valve stem nut. However, the transmission lubrication method is still to manually add lubricating oil when the lubrication performance of the relevant components is found to have decreased. Manual addition will not only delay the progress of the work to a certain extent, but also cause the lubricating oil to be added in an untimely manner, resulting in the lubrication performance not being guaranteed, further affecting the service life of the actuator. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides a gate valve driving actuator to solve the problems raised in the background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gate valve driving actuator, comprising an actuator housing connected to the gate valve, a worm wheel and a worm are respectively arranged inside the actuator housing, the worm wheel is connected to the gate valve, the worm wheel and the worm are meshed, a reduction motor and a manual drive shaft are respectively arranged on both sides of the actuator housing, a hand wheel is arranged on the outside of the manual drive shaft, a first transmission rod is arranged at one end of the output shaft of the reduction motor close to the worm, a second transmission rod is arranged at one end of the manual drive shaft close to the worm, a first connecting member is sleeved on the outside of the first transmission rod, a second connecting member is sleeved on the outside of the second transmission rod, a first transmission member and a second transmission member are respectively arranged at two ends of the worm, a first transmission groove adapted to the first connecting member is opened on the outer surface of the first transmission member, and a second spring is connected between the first connecting member and the actuator housing;

[0008] The outer surface of the second transmission member is provided with a second transmission groove adapted to the second connecting member, the outer surface of the manual drive shaft is provided with a rotating extrusion device, a first spring is connected between the rotating extrusion device and the second connecting member, and a connecting frame is connected between the rotating extrusion device and the first connecting member;

[0009] An oil storage tank is provided outside the actuator housing, an oil outlet pipe extending into the actuator housing is provided outside the oil storage tank, a push-type valve is provided on the oil outlet pipe, and an extrusion piece is provided on the connecting frame outside the push-type valve.

[0010] Preferably, the output shaft of the reduction motor and the manual drive shaft are coaxial with the worm, and the reduction motor and the manual drive shaft are respectively located on both sides of the worm.

[0011] Preferably, the first transmission rod and the second transmission rod are both in the shape of regular polygonal columns, the end of the first transmission rod is movably connected to the first transmission member, and the end of the second transmission rod is movably connected to the second transmission member.

[0012] Preferably, the first connecting member and the second connecting member are both in the shape of toothed discs, the first connecting member is inserted and engaged in the first transmission groove, and the second connecting member is located outside the second transmission groove.

[0013] Preferably, the rotating extrusion device includes a guide sleeve and an extrusion sleeve slidably connected to the guide sleeve, the guide sleeve is fixedly connected to the inside of the actuator housing, the extrusion sleeve is arranged on the outside of the manual drive shaft, the outer surface of the extrusion sleeve is provided with a guide groove, the guide groove includes two oblique grooves, one end of the two oblique grooves are connected to each other, and the two oblique grooves are symmetrically distributed with the axial cross-section of the extrusion sleeve as a reference plane, a connecting pin is provided on the outside of the manual drive shaft, the connecting pin is located in the guide groove, a pressure plate is provided at the end of the extrusion sleeve, the pressure plate is connected to the first spring, the outer surface of the extrusion sleeve is provided with a groove, and an anti-rotation component is provided in the groove.

[0014] Preferably, the anti-rotation assembly includes a pressure block, an elastic member is provided between the pressure block and the extrusion sleeve, a striped protrusion is provided on the outer surface of the pressure block, the length direction of the striped protrusion is parallel to the axial direction of the manual drive shaft, and the pressure block abuts against the inner surface of the guide sleeve through the striped protrusion.

[0015] Preferably, the elastic member is a torsion spring, a connecting shaft is provided on one side of the pressure block, the pressure block is rotatably connected to the groove via the connecting shaft, and the torsion spring is sleeved on the outside of the connecting shaft.

[0016] Preferably, a valve stem nut is fixedly connected to the inner hole of the worm gear, a valve stem is provided inside the valve stem nut, and the valve stem is connected to the gate valve.

[0017] Preferably, a valve stem sleeve is fixedly connected to the actuator housing, the valve stem sleeve is sleeved on the upper end of the valve stem, the end of the oil outlet pipe away from the oil storage tank is connected to the interior of the valve stem sleeve, and the upper surface of the worm gear is provided with a sleeve coaxial with the worm gear, and the sleeve is sleeved on the lower end of the valve stem sleeve.

[0018] Preferably, a filling port is provided on the oil storage tank, and a sealing cover is provided outside the filling port.

[0019] (III) Beneficial effects

[0020] Compared with the prior art, the present invention provides a gate valve driving actuator having the following beneficial effects:

[0021] 1. The purpose of automatic conversion between the electric mode and the manual mode of the actuator can be achieved without additional operation, so the switching between manual and electric can be faster and more convenient, and the actuator can be more suitable for use in emergency situations. Moreover, when switching to manual mode, the mechanical transmission components between the reduction motor and the worm will be directly disconnected, and the disconnection between the reduction motor and the worm achieved by the mechanical components can make the disconnection between the two more thorough, so it can prevent the operator from being injured due to the start-up of the reduction motor during manual operation, ensure the safety of manual operation, and make the actuator safer and more reliable.

[0022] 2. In the electric mode, the output shaft of the reduction motor is connected to the worm by the engagement between the first connecting member and the first transmission groove. In the manual mode, the manual drive shaft is connected to the worm by the engagement between the second connecting member and the second transmission groove. The engagement can effectively prevent the output shaft of the reduction motor or the manual drive shaft from failing during transmission with the worm. Therefore, it is more reliable than the friction transmission method and can transmit a larger torque, making the actuator more durable and ensuring the normal opening and closing of the gate valve. At the same time, it can effectively improve the reliability and service life of the actuator.

[0023] 3. The purpose of automatically filling lubricating oil to the corresponding parts inside the actuator while manually operating the actuator is achieved, so that the filling of lubricating oil no longer needs to be done manually, which will make the filling of lubricating oil more timely, thereby better ensuring the lubrication performance, further ensuring the reliability and service life of the actuator. At the same time, automatic filling can also reduce the workload of daily maintenance, making it more convenient to use, and playing a positive role in the daily use and maintenance of the actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the side-view stereoscopic structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the internal front view structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the side cross-sectional structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the worm gear of the present invention;

[0028] Figure 5 It is a schematic diagram of the exploded three-dimensional structure between the output shaft and the worm of the reduction motor of the present invention;

[0029] Figure 6 It is a schematic diagram of the exploded three-dimensional structure between the manual drive shaft and the worm gear of the present invention;

[0030] Figure 7 It is a schematic diagram of the front cross-sectional structure of the worm of the present invention;

[0031] Figure 8 For the present invention Figure 7 The enlarged structural diagram at A in the middle;

[0032] Fig. 9 This is a schematic diagram of the three-dimensional structure of the pressing block of the present invention when viewed from above;

[0033] Fig.10 It is a schematic diagram of the cross-sectional structure of the actuator housing of the present invention from a side view;

[0034] Fig.11 It is a schematic diagram of the top cross-sectional structure of the actuator housing of the present invention.

[0035] In the figure: 1, actuator housing; 2, reduction motor; 201, output shaft; 2011, first transmission rod; 3, manual drive shaft; 301, second transmission rod; 4, hand wheel; 5, worm gear; 6, worm; 7, rotating extrusion device; 701, guide sleeve; 702, extrusion sleeve; 7021, groove; 703, guide groove; 704, connecting pin; 705, pressure plate; 8, anti-rotation assembly; 801, pressure block; 802, connecting shaft; 803, torsion spring; 804, striped convex 1. first transmission member; 1. first transmission groove; 1. second transmission member; 1. second transmission groove; 2. first connecting member; 3. second connecting member; 4. first spring; 5. connecting frame; 6. second spring; 7. valve stem sleeve; 8. oil storage tank; 9. sealing cover; 10. oil outlet pipe; 11. push-type valve; 12. sleeve; 13. pressure wheel; 14. gate valve; 15. valve stem nut; 16. valve stem. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] Embodiment 1

[0041] The present invention provides Figures 1 to 9 A gate valve drive actuator shown:

[0042] The actuator housing 1 includes an actuator housing 1 connected to a gate valve 20, wherein a worm wheel 5 and a worm 6 are respectively arranged inside the actuator housing 1, wherein the worm wheel 5 is rotatably mounted inside the actuator housing 1 through a bearing, wherein a bearing seat is also fixedly mounted inside the actuator housing 1, wherein the worm 6 is rotatably mounted on the bearing seat through a bearing, wherein a valve stem nut 21 is fixedly connected inside the inner hole of the worm wheel 5, wherein a valve stem 22 is arranged inside the valve stem nut 21, wherein the valve stem 22 is connected to a gate plate of the gate valve 20, wherein the worm wheel 5 is meshed with the worm 6, wherein a reduction motor 2 and a manual drive shaft 3 are respectively arranged on both sides of the actuator housing 1, wherein a hand wheel 4 is arranged outside the manual drive shaft 3, wherein an output shaft 201 of the reduction motor 2 and the manual drive shaft 3 are both coaxial with the worm 6 and are respectively located on both sides of the worm 6, wherein an end of the output shaft 201 of the reduction motor 2 close to the worm 6 is provided with a first transmission rod 2011, wherein the manual drive shaft A second transmission rod 301 is provided at one end close to the worm 6. The shapes of the first transmission rod 2011 and the second transmission rod 301 are both regular polygonal prisms. The first transmission rod 2011 is sleeved with a first connecting member 1001 on the outside, and the second transmission rod 301 is sleeved with a second connecting member 1002 on the outside. The shapes of the first connecting member 1001 and the second connecting member 1002 are both toothed discs. The first transmission member 901 and the second transmission member 902 are fixedly connected at both ends of the worm 6, respectively. The outer surface of the first transmission member 901 is provided with a first transmission groove 9011 adapted to the first connecting member 1001. The first connecting member 1001 is inserted and embedded in the first transmission groove 9011. The end of the first transmission rod 2011 is rotatably connected to the first transmission member 901. A second spring 13 is connected between the first connecting member 1001 and the actuator housing 1.

[0043] like Figures 2 to 4 as well as Figure 7As shown, in the initial state, the toothed first connecting member 1001 is inserted and engaged in the first transmission groove 9011 matched with it. At this time, the output end of the reduction motor 2 can be connected to the worm 6 through the first transmission rod 2011, the first connecting member 1001, the first transmission groove 9011 and the first transmission member 901. Therefore, when the reduction motor 2 is started, its output shaft 201 can drive the first connecting member 1001 to rotate through the first transmission rod 2011, and the first connecting member 1001 then drives the first transmission member 901 and the worm 6 to rotate around the axis of the worm 6 through the first transmission groove 9011. The worm 6 then drives the valve stem nut 21 to rotate slowly through the worm wheel 5. The rotation of the valve stem nut 21 can drive the valve stem 22 and the gate plate in the gate valve 20 to move upward or downward, and achieve the purpose of controlling the opening and closing of the gate valve 20 by electric means.

[0044] like Figures 4 to 7 As shown, the outer surface of the second transmission member 902 is provided with a second transmission groove 9021 adapted to the second connecting member 1002, the second connecting member 1002 is located outside the second transmission groove 9021, and the end of the second transmission rod 301 is rotatably connected to the second transmission member 902;

[0045] like Figure 6 and Figure 7 As shown, a rotating extrusion device 7 is provided outside the manual drive shaft 3, a first spring 11 is connected between the rotating extrusion device 7 and the second connecting member 1002, a connecting frame 12 is connected between the rotating extrusion device 7 and the first connecting member 1001, and the connecting frame 12 is slidably installed inside the actuator housing 1 along the length direction of the worm 6;

[0046] The rotating extrusion device 7 includes a guide sleeve 701 and a cylindrical extrusion sleeve 702 slidably connected to the guide sleeve 701. The guide sleeve 701 is fixedly connected to the inside of the actuator housing 1. The extrusion sleeve 702 is sleeved on the outside of the manual drive shaft 3. A guide groove 703 is provided on the outer surface of the extrusion sleeve 702. The guide groove 703 includes two inclined grooves. One end of the two inclined grooves is connected to each other, and the two inclined grooves are symmetrically distributed with the axial section of the extrusion sleeve 702 as a reference plane. A connecting pin 704 is provided on the outside of the manual drive shaft 3. The connecting pin 704 is located in the middle position of the guide groove 703. A pressure plate 705 is provided at the end of the extrusion sleeve 702. The pressure plate 705 is connected to the first spring 11. A groove 7021 is provided on the outer surface of the extrusion sleeve 702. An anti-rotation component 8 is provided in the groove 7021.

[0047] like Fig. 9 and Fig.10As shown, the anti-rotation assembly 8 includes a pressing block 801, an elastic member is provided between the pressing block 801 and the extrusion sleeve 702, a striped protrusion 804 is provided on the outer surface of the pressing block 801, and the length direction of the striped protrusion 804 is parallel to the axial direction of the manual drive shaft 3, and the pressing block 801 abuts against the inner surface of the guide sleeve 701 through the striped protrusion 804;

[0048] The elastic member is a torsion spring 803. A connecting shaft 802 is provided on one side of the pressing block 801. The pressing block 801 is rotatably connected to the groove 7021 through the connecting shaft 802. The torsion spring 803 is sleeved on the outside of the connecting shaft 802.

[0049] When manual operation is required, the manual drive shaft 3 is rotated by the hand wheel 4 to drive the manual drive shaft 3 to rotate along its own axis. Since the pressure block 801 shrinks in the groove 7021 and compresses the torsion spring 803 to a certain extent, the striped protrusion 804 on the surface of the pressure block 801 is tightly pressed against the inner surface of the guide sleeve 701. Moreover, since the length direction of the striped protrusion 804 is parallel to the axis of the manual drive shaft 3, the pressure block 801 can prevent the extrusion sleeve 702 from rotating on the guide sleeve 701 without affecting the sliding of the extrusion sleeve 702 in the guide sleeve 701 along its axial direction. Therefore, when the manual drive shaft 3 is just started to be rotated, the extrusion sleeve 702 will not rotate in the guide sleeve 701. When the second connecting member 1002 and the second transmission groove 9021 are in the same position, the second connecting member 1002 can be directly inserted into the second transmission groove 9021. When the second connecting member 1002 and the second transmission groove 9021 are not in the same position, the second connecting member 1002 will firstly contact the outer surface of the second transmission member 902, and then the extrusion sleeve 702 will continue to slide. The first spring 11 can be compressed to a certain extent by the movement until the pressure block 801 is separated from the guide sleeve 701, the pressure block 801 will rotate outward around the connecting shaft 802, and the connecting pin 704 will just slide to the end of the guide groove 703. At this time, under the action of the connecting pin 704 and the end of the guide groove 703, the extrusion sleeve 702 will also rotate with the manual drive shaft 3, and the extrusion sleeve 702 will be kept in this position. At the same time, under the action of the second transmission rod 301, the manual drive shaft 3 will also drive the second connecting member 1002 to rotate synchronously, until the second connecting member 1002 rotates to the corresponding hole position of the second transmission groove 9021, and the second connecting member 1002 is inserted into the second transmission groove 9021 under the rebound force of the first spring 11. The first connecting member 1001 is pushed to slide on the first transmission rod 2011 in the direction away from the worm 6 through the connecting frame 12, thereby compressing the second spring 13 to a certain extent, and the first connecting member 1001 is pulled out from the first transmission groove 9011, thereby disconnecting the reduction motor 2 and the worm 6. At this time, the manual drive shaft 3 is continuously rotated to drive the second transmission member 902 and the worm 6 to rotate through the second transmission rod 301, the second connecting member 1002 and the second transmission groove 9021, and the purpose of manually controlling the opening and closing of the gate valve 20 is achieved.

[0050] When the manual operation is completed, it is only necessary to loosen the hand wheel 4. At this time, the first connecting member 1001 can be pushed in the direction of the worm 6 under the action of the rebound force of the second spring 13, so that the first connecting member 1001 slides in the direction of the first transmission member 901. When the first connecting member 1001 and the hole position of the first transmission groove 9011 just correspond, the first connecting member 1001 can be inserted back into the first transmission groove 9011. When the hole position of the first connecting member 1001 and the first transmission groove 9011 do not correspond, the first connecting member 1001 can be against the outer surface of the first transmission member 901 under the action of the rebound force of the second spring 13. When the reduction motor 2 is started next time for electric control, the first connecting member 1001 can be driven to rotate by the first transmission rod 2011. When the first connecting member 1001 rotates to correspond to the hole position of the first transmission groove 9011, the first connecting member 1001 can be reinserted into the first transmission groove 9011 under the push of the second spring 13.

[0051] In the process of the second spring 13 pushing the first connecting member 1001 to return to its original position, the first connecting member 1001 will also push the pressure plate 705 through the connecting frame 12, and the pressure plate 705 can pull the second connecting member 1002 out of the second transmission groove 9021 through the first spring 11, so as to disconnect the manual drive shaft 3 and the worm 6, and thereby achieve the purpose of switching the actuator from the electric mode to the manual mode;

[0052] Moreover, when the extrusion sleeve 702 slides to its original position, the pressure block 801 can be squeezed back into the groove 7021 under the extrusion of the guide sleeve 701. After the pressure block 801 is completely retracted into the groove 7021, it will move and compress the torsion spring 803, and the connecting pin 704 will also be reset to the middle position of the guide groove 703 as the extrusion sleeve 702 is reset.

[0053] Embodiment 2

[0054] The present invention provides Figure 1 , Figure 3 , Fig.10 as well as Fig.11 A gate valve driving actuator shown in the figure: an oil storage tank 15 is provided outside the actuator housing 1, a filling port is provided on the oil storage tank 15, lubricating oil is filled into the oil storage tank 15 through the filling port, a sealing cover 1501 is provided outside the filling port, and an oil outlet pipe 16 extending into the actuator housing 1 is provided outside the oil storage tank 15, a press-type valve 17 is provided on the oil outlet pipe 16, and an extrusion piece is provided on the connecting frame 12 on the outside of the press-type valve 17, and the extrusion piece is a pressure wheel 19;

[0055] A valve stem sleeve 14 is fixedly connected to the actuator housing 1, and the valve stem sleeve 14 is sleeved on the upper end of the valve stem 22. The end of the oil outlet pipe 16 away from the oil storage tank 15 is connected to the interior of the valve stem sleeve 14. The upper surface of the worm gear 5 is provided with a coaxial sleeve 18 therewith, and the sleeve 18 is sleeved on the lower end of the valve stem sleeve 14.

[0056] During the conversion between the electric mode and the manual mode, the connecting frame 12 moves a certain distance, and the connecting frame 12 drives the pressure wheel 19 to move synchronously. When the pressure wheel 19 passes under the push-type valve 17, it squeezes the button of the push-type valve 17 upwards, thereby opening the push-type valve 17. At this time, the lubricating oil in the oil storage tank 15 can flow into the valve stem sleeve 14 through the oil outlet pipe 16, and drip into the sleeve 18 through the valve stem sleeve 14, so that the lubricating oil is filled between the valve stem nut 21 and the valve stem 22, and lubricates the two. When the pressure wheel 19 slides under the push-type valve 17, the button of the push-type valve 17 will automatically reset and cut off the oil outlet pipe 16, finally realizing the purpose of automatically filling the corresponding components inside the actuator with lubricating oil while manually operating the actuator.

[0057] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gate valve driving actuator, comprising an actuator housing (1) connected to a gate valve (20), a worm wheel (5) and a worm (6) being arranged inside the actuator housing (1), the worm wheel (5) being connected to the gate valve (20), the worm wheel (5) and the worm (6) being meshed, a reduction motor (2) and a manual drive shaft (3) being arranged on both sides of the actuator housing (1), a hand wheel (4) being arranged outside the manual drive shaft (3), Features: A first transmission rod (2011) is provided at one end of the output shaft (201) of the reduction motor (2) close to the worm (6); a second transmission rod (301) is provided at one end of the manual drive shaft (3) close to the worm (6); a first connecting member (1001) is sleeved on the outside of the first transmission rod (2011); a second connecting member (1002) is sleeved on the outside of the second transmission rod (301); a first transmission member (901) and a second transmission member (902) are provided at two ends of the worm (6); a first transmission groove (9011) adapted to the first connecting member (1001) is provided on the outer surface of the first transmission member (901); and a second spring (13) is connected between the first connecting member (1001) and the actuator housing (1); The outer surface of the second transmission member (902) is provided with a second transmission groove (9021) adapted to the second connecting member (1002); the outside of the manual drive shaft (3) is provided with a rotating extrusion device (7); a first spring (11) is connected between the rotating extrusion device (7) and the second connecting member (1002); and a connecting frame (12) is connected between the rotating extrusion device (7) and the first connecting member (1001); An oil storage tank (15) is provided outside the actuator housing (1), an oil outlet pipe (16) extending into the actuator housing (1) is provided outside the oil storage tank (15), a push-type valve (17) is provided on the oil outlet pipe (16), and an extrusion piece is provided on the connecting frame (12) outside the push-type valve (17).

2. The gate valve driving actuator according to claim 1, Features: The output shaft (201) of the reduction motor (2) and the manual drive shaft (3) are both coaxial with the worm (6), and the reduction motor (2) and the manual drive shaft (3) are respectively located on both sides of the worm (6).

3. The gate valve driving actuator according to claim 1, Features: The first transmission rod (2011) and the second transmission rod (301) are both in the shape of regular polygonal prisms; the end of the first transmission rod (2011) is movably connected to the first transmission member (901), and the end of the second transmission rod (301) is movably connected to the second transmission member (902).

4. The gate valve driving actuator according to claim 1, Features: The first connecting member (1001) and the second connecting member (1002) are both in the shape of toothed discs; the first connecting member (1001) is inserted and engaged in the first transmission groove (9011), and the second connecting member (1002) is located outside the second transmission groove (9021).

5. The gate valve driving actuator according to claim 1, Features: The rotary extrusion device (7) comprises a guide sleeve (701) and an extrusion sleeve (702) slidably connected to the guide sleeve (701). The guide sleeve (701) is fixedly connected to the inside of the actuator housing (1). The extrusion sleeve (702) is sleeved on the outside of the manual drive shaft (3). A guide groove (703) is provided on the outer surface of the extrusion sleeve (702). The guide groove (703) comprises two inclined grooves. One end of the two inclined grooves is connected to each other, and the two inclined grooves are symmetrically distributed with the axial section of the extrusion sleeve (702) as a reference plane. A connecting pin (704) is provided on the outside of the manual drive shaft (3). The connecting pin (704) is located in the guide groove (703). A pressure plate (705) is provided at the end of the extrusion sleeve (702). The pressure plate (705) is connected to the first spring (11). A groove (7021) is provided on the outer surface of the extrusion sleeve (702). An anti-rotation component (8) is provided in the groove (7021).

6. The gate valve driving actuator according to claim 5, Features: The anti-rotation assembly (8) comprises a pressing block (801), an elastic member is provided between the pressing block (801) and the extrusion sleeve (702), a striped protrusion (804) is provided on the outer surface of the pressing block (801), the length direction of the striped protrusion (804) is parallel to the axial direction of the manual drive shaft (3), and the pressing block (801) abuts against the inner surface of the guide sleeve (701) through the striped protrusion (804).

7. The gate valve driving actuator according to claim 6, Features: The elastic member is a torsion spring (803), a connecting shaft (802) is provided on one side of the pressing block (801), the pressing block (801) is rotatably connected to the groove (7021) via the connecting shaft (802), and the torsion spring (803) is sleeved on the outside of the connecting shaft (802).

8. The gate valve driving actuator according to claim 1, Features: A valve stem nut (21) is fixedly connected to the inner hole of the worm wheel (5), a valve stem (22) is arranged inside the valve stem nut (21), and the valve stem (22) is connected to the gate valve (20).

9. The gate valve driving actuator according to claim 8, Features: A valve stem sleeve (14) is fixedly connected to the actuator housing (1), and the valve stem sleeve (14) is sleeved on the upper end of the valve stem (22). The end of the oil outlet pipe (16) away from the oil storage tank (15) is connected to the interior of the valve stem sleeve (14). The upper surface of the worm gear (5) is provided with a sleeve (18) coaxial therewith, and the sleeve (18) is sleeved on the lower end of the valve stem sleeve (14).

10. The gate valve driving actuator according to claim 9, Features: The oil storage tank (15) is provided with a filling port, and a sealing cover (1501) is provided outside the filling port.

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