Electric actuator for valve

Abstract

The invention relates to the technical field of electric actuators, in particular to a valve electric actuator which comprises a transmission box and an oil filter, when automatic control of a valve is achieved, a power source drives a first transmission shaft, the first transmission shaft and a second transmission shaft rotate synchronously, and the second transmission shaft drives a rotating shaft of the valve to rotate synchronously when rotating. When the first transmission shaft rotates, the oil pumping piece conveys lubricating oil in the transmission box into the filtering pipe through the oil inlet, the filtering disc is arranged in the filtering pipe, the lubricating oil entering the filtering pipe can be filtered by the filtering disc, and the filtered lubricating oil returns to the interior of the transmission box again through the oil outlet. After metal scraps of the lubricating oil are intercepted by the filtering disc, the metal scraps in the lubricating oil in the transmission box are reduced, and therefore the service life of the first transmission shaft and the second transmission shaft is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of electric actuators, and in particular to a valve electric actuator. Background Art

[0002] In the field of industrial automation, valve electric actuators are key equipment for realizing valve automation control. In the prior art, for example, the Chinese invention patent with announcement number CN116379201A discloses an electric actuator that is convenient for judging the valve opening degree. In the public document, the worm wheel, worm and first gear can be lubricated by setting the oil tank and the heating wire to prevent them from getting stuck. However, friction between the worm wheel and the worm is inevitable during the transmission process. The friction between the worm wheel and the worm will cause the worm wheel and the worm to wear, thereby generating metal debris. In the environment of immersion lubrication, metal debris will be mixed into the lubricating oil; as time goes by, the debris in the lubricating oil continues to accumulate, and the lubricating effect of the lubricating oil will gradually decrease. When the lubricating effect of the lubricating oil drops to a certain extent, the lubricating oil will increase the wear of the worm wheel and worm, thereby shortening the service life of the worm wheel and worm, increasing the equipment maintenance cost and downtime, and also greatly increasing the transmission noise between the worm wheel and the worm. Summary of the invention

[0003] The invention provides a valve electric actuator to solve the problem that the service life of the existing valve electric actuator is easily reduced.

[0004] A valve electric actuator of the present invention adopts the following technical solution: A valve electric actuator comprises a transmission box and an oil filter.

[0005] A horizontal first transmission shaft and a vertical second transmission shaft are arranged in the transmission box, a power source for starting the rotation of the first transmission shaft is arranged on the outside of the transmission box, and the transmission box is filled with lubricating oil; the second transmission shaft is coaxially fixedly connected with the rotating shaft of the valve; the oil filter comprises an oil pumping member and a filter tube, the filter tube is arranged on the outside of the transmission box, the filter tube has an oil inlet and an oil outlet, the oil pumping member is used for pumping the lubricating oil in the transmission box into the filter tube through the oil inlet when the first transmission shaft rotates; the oil outlet of the filter tube is connected with the inside of the transmission box; a filter disc is arranged inside the filter tube, and the filter disc can filter the lubricating oil passing through the filter tube.

[0006] Furthermore, a first cylinder and a second cylinder are coaxially arranged inside the filter tube, the first cylinder is close to the oil inlet, and the second cylinder is close to the oil outlet; the first cylinder and the second cylinder are connected by a reversing disk; the filter disk is arranged inside the first cylinder and the second cylinder; the outer diameter of the first cylinder is the same as the outer diameter of the second cylinder, and the outer diameter of the first cylinder is smaller than the inner diameter of the filter tube; the outer diameter of the reversing disk is equal to the inner diameter of the filter tube, and the reversing disk has a first channel and a second channel inside, the first channel can connect the outside of the first cylinder with the inside of the second cylinder, and the second channel can connect the outside of the second cylinder with the inside of the first cylinder; when the lubricating oil in the transmission box is filtered, the lubricating oil in the filter tube flows from the oil inlet to the oil outlet, and the first channel and the second channel are in a conducting state.

[0007] Furthermore, the reversing disc also has a third channel and a fourth channel, the third channel can connect the outside of the first cylinder with the outside of the second cylinder, and the fourth channel can connect the inside of the first cylinder with the inside of the second cylinder; the third channel and the fourth channel are blocked or connected at the same time, and the first channel and the second channel are blocked or connected at the same time; when the lubricating oil in the transmission box is filtered, the third channel and the fourth channel are in a blocked state; when the filter disc is cleaned, cleaning liquid is transported into the filter tube through the oil outlet, the first channel and the second channel are in a blocked state, and the third channel and the fourth channel are in a connected state.

[0008] Further, the reversing disc includes a first disc body and a second disc body; the first disc body is coaxially fixedly connected to the first cylinder, the second disc body is coaxially fixedly connected to the second cylinder, and the first disc body and the second disc body are rotatably connected; a limiting protrusion is fixedly provided on the first disc body, and a limiting arc groove is provided on the second disc body, the limiting protrusion is slidably provided in the limiting arc groove, and the limiting arc groove has a first end and a second end, and when the lubricating oil in the transmission box is filtered, the limiting protrusion is at the first end, and the first channel and the second channel are in a conducting state; when the filter disc is cleaned, the limiting protrusion is at the second end, and the third channel and the fourth channel are in a conducting state.

[0009] Furthermore, a first spiral plate is disposed on the outer side wall of the first cylinder, and a second spiral plate is disposed on the outer side wall of the second cylinder, and the spiral directions of the first spiral plate and the second spiral plate are opposite.

[0010] Furthermore, the filter disc is provided with a conical filter hole, the diameter of the filter hole close to the oil inlet is smaller than the diameter close to the oil outlet, and the filter disc in the first cylinder is provided with a slag discharge pipe, one end of the slag discharge pipe penetrates the filter disc, the slag discharge pipe extends toward the oil inlet, and the end of the slag discharge pipe is flush with the end of the filter disc away from the oil inlet; a first one-way valve is provided inside the slag discharge pipe, and the conduction direction of the first one-way valve is from the direction of the oil outlet to the direction of the oil inlet.

[0011] Furthermore, a mounting groove is provided on the first disk body, a connecting disk is fixedly provided in the mounting groove, the first disk body and the connecting disk are both hollow inside, a first liquid inlet connecting the inside of the first disk body and the outside of the first cylinder body is provided on the end surface of the first disk body close to the oil inlet, two first liquid outlets connecting the inside of the first disk body and the external environment are provided on the end surface of the first disk body away from the oil inlet, and the two first liquid outlets are located in the same radial line of the first disk body; a second liquid inlet connecting the inside of the first cylinder body and the inside of the connecting disk is provided on the end surface of the connecting disk close to the oil inlet, and two first liquid outlets connecting the inside of the connecting disk and the outside environment are provided on the end surface of the connecting disk away from the oil inlet The second liquid outlet for the internal and external environments, the two second liquid outlets are located in the same radial line of the connecting disk; the second disk body is provided with a third liquid inlet and a fourth liquid inlet penetrating its side wall, the third liquid inlet is connected to the inside of the second cylinder body, the fourth liquid inlet is connected to the outside of the second cylinder body, and the third liquid inlet and the fourth liquid inlet are located in two different radial lines of the second disk body; the first liquid outlet is connected to the third liquid inlet to form the first channel, and the second liquid outlet is connected to the fourth liquid inlet to form the second channel; the first liquid outlet is connected to the fourth liquid inlet to form the third channel, and the second liquid outlet is connected to the third liquid inlet to form the fourth channel.

[0012] Furthermore, the inner wall of the filter tube is provided with two sections of first spiral grooves, and the outer wall of the filter tube is provided with two sections of second spiral grooves, the spiral directions of the two first spiral grooves are opposite, the spiral directions of the two second spiral grooves are opposite, the spiral directions of the first spiral groove and the second spiral groove corresponding to the outside of the first cylinder are the same, and the spiral directions of the first spiral groove and the second spiral groove corresponding to the outside of the second cylinder are the same.

[0013] Furthermore, the oil pumping part includes two oil pumping pipes, and the two oil pumping pipes are vertically arranged inside the transmission box. A connecting pipe is arranged inside the transmission box, and the connecting pipe is connected with the upper ends of the two oil pumping pipes at the same time, and the middle part of the connecting pipe is connected with the oil inlet of the filter tube; a conveying auger is arranged in each of the oil pumping pipes, and the spiral directions of the two conveying augers are opposite. A transmission part is arranged between the first transmission shaft and the two conveying augers, and the transmission part is used for rotating the two conveying augers at the same time when the first transmission shaft rotates, and the rotation directions of the two conveying augers are the same; two second one-way valves are arranged in the connecting pipe, and the conduction direction of the second one-way valve is that the end of the connecting pipe points to the middle part of the connecting pipe.

[0014] Furthermore, the transmission member includes a transmission gear, a fixed gear and a transmission belt. The ends of the two conveying augers are coaxially fixed with fixed disks, and the transmission belt is simultaneously wrapped around the two fixed disks. The fixed gear is coaxially fixedly connected to the second transmission shaft, and the transmission gear is rotatably connected to the inner wall of the transmission box, and the transmission gear is meshed with the fixed gear; the transmission gear is coaxially fixedly connected to a drive disk, and the drive disk is used to drive the transmission belt to move.

[0015] The beneficial effects of the present invention are as follows: a valve electric actuator of the present invention includes a transmission box and an oil filter. When realizing automatic control of the valve, a power source drives the first transmission shaft, and the first transmission shaft rotates synchronously with the second transmission shaft. When the second transmission shaft rotates, the rotating shaft of the valve is driven to rotate synchronously, so that the valve opens or closes the valve body. When the first transmission shaft rotates, the oil pump delivers the lubricating oil in the transmission box to the filter tube through the oil inlet. By arranging a filter disk inside the filter tube, the lubricating oil entering the filter tube can be filtered by the filter disk. The filtered lubricating oil returns to the transmission box again through the oil outlet. After the metal debris of the lubricating oil is intercepted by the filter disk, the metal debris in the lubricating oil in the transmission box is reduced, thereby improving the service life of the first transmission shaft and the second transmission shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic diagram of the structure of an electric valve actuator provided by an embodiment of the present invention; Figure 2 A front view of an electric valve actuator provided by an embodiment of the present invention; Figure 3 for Figure 2 Sectional view in the AA direction; Figure 4 An exploded diagram of a transmission box and internal structure in an electric valve actuator provided by an embodiment of the present invention; Figure 5 A front view of an oil filter in an electric valve actuator provided by an embodiment of the present invention; Figure 6 for Figure 5 Cross-sectional view in the BB direction; Figure 7 An exploded diagram of the structure of an oil pump component in an electric valve actuator provided by an embodiment of the present invention; Figure 8 A schematic diagram of the structure of a filter tube in a valve electric actuator provided by an embodiment of the present invention after being cut; Fig. 9 A structural explosion diagram from a first perspective of a filter tube and internal structure in an electric valve actuator provided by an embodiment of the present invention; Fig.10 A structural explosion diagram from a second perspective of a filter tube and internal structure in an electric valve actuator provided by an embodiment of the present invention; Fig.11 A schematic diagram of the structure of a pump oil pipe, a connecting pipe and other structures in a valve electric actuator provided by an embodiment of the present invention after being cut away; Fig.12 A cross-sectional view of a filter disc in a valve electric actuator provided in an embodiment of the present invention.

[0018] In the figure: 110, transmission box; 120, first transmission shaft; 130, second transmission shaft; 140, drive motor; 141, reducer; 150, filter tube; 151, oil inlet; 152, oil outlet; 160, filter plate; 161, filter hole; 170, first cylinder; 180, second cylinder; 190, reversing plate; 191, first plate; 192, second plate; 210, limit arc groove; 220, limit protrusion; 230, first spiral plate; 240, second spiral plate; 250, row Slag pipe; 310, connecting plate; 320, first liquid inlet; 330, first liquid outlet; 340, second liquid inlet; 350, second liquid outlet; 360, third liquid inlet; 370, fourth liquid inlet; 410, first spiral groove; 420, second spiral groove; 510, pump oil pipe; 520, conveying auger; 530, connecting pipe; 531, second one-way valve; 540, transmission gear; 550, fixed gear; 560, transmission belt; 570, fixed plate; 580, driving plate; 590, installation box. DETAILED DESCRIPTION

[0019] 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.

[0020] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] like Figures 1 to 12 As shown, an embodiment of the present invention provides an electric valve actuator, which includes a transmission box 110 and an oil filter.

[0023] The transmission box 110 is hollow inside, and a horizontal first transmission shaft 120 is arranged inside the transmission box 110. A power source is arranged outside the transmission box 110. In this embodiment, the power source includes a driving motor 140 and a reducer 141. The reducer 141 is arranged on the power output shaft of the driving motor 140. The output shaft of the reducer 141 is coaxially fixedly connected with the first transmission shaft 120, so that the first transmission shaft 120 can rotate in the transmission box 110. A vertical second transmission shaft 130 is arranged in the transmission box 110. A worm gear is arranged in the middle of the first transmission shaft 120, and a worm is arranged in the middle of the second transmission shaft 130. The worm gear of the first transmission shaft 120 and the worm of the second transmission shaft 130 cooperate with each other, so that when the first transmission shaft 120 rotates, the second transmission shaft 130 rotates synchronously. The lower end of the second transmission shaft 130 extends outside the transmission box 110, and the lower end of the second transmission shaft 130 is coaxially fixedly connected with the rotating shaft of the valve. When the second transmission shaft 130 rotates, the valve gradually blocks or opens the valve body. Furthermore, in order to reduce the wear between the first transmission shaft 120 and the second transmission shaft 130 , lubricating oil is filled in the transmission box 110 to reduce the probability of metal debris being generated between the first transmission shaft 120 and the second transmission shaft 130 .

[0024] The oil filter includes an oil pump and a filter tube 150. The filter tube 150 is arranged outside the transmission case 110. The two ends of the filter tube 150 in the axial direction are an oil inlet 151 and an oil outlet 152 respectively. The oil outlet 152 of the filter tube 150 is detachably connected to the transmission case 110. When the filter tube 150 is connected to the transmission case 110, the oil outlet 152 of the filter tube 150 is connected to the inside of the transmission case 110. The oil pump is used to pump the lubricating oil into the filter tube 150 through the oil inlet 151 when the first transmission shaft 120 rotates. The lubricating oil entering the filter tube 150 is transported to the inside of the transmission case 110 again through the oil outlet 152, thereby realizing the circulation of the lubricating oil. A filter plate 160 is arranged inside the filter tube 150. When the lubricating oil flows through the filter tube 150, the filter plate 160 inside the filter tube 150 intercepts metal debris in the lubricating oil, so that the lubricating oil discharged into the transmission box 110 at the oil outlet 152 is lubricating oil without metal debris, thereby reducing the content of metal debris in the lubricating oil inside the transmission box 110.

[0025] A valve electric actuator of the present invention, when realizing automatic control of the valve, the driving motor 140 drives the first transmission shaft 120 through the deceleration of the reducer 141, and the first transmission shaft 120 and the second transmission shaft 130 are coordinated by the worm wheel and the worm, so that the first transmission shaft 120 and the second transmission shaft 130 rotate synchronously, and the rotation shaft of the valve is driven to rotate synchronously when the second transmission shaft 130 rotates, so that the valve opens or closes the valve body, and when the first transmission shaft 120 rotates, the oil pump delivers the lubricating oil in the transmission box 110 to the filter tube 150 through the oil inlet 151, and by arranging a filter plate 160 inside the filter tube 150, the lubricating oil entering the filter tube 150 can be filtered by the filter plate 160, and the filtered lubricating oil returns to the transmission box 110 again through the oil outlet 152, and the metal debris of the lubricating oil is intercepted by the filter plate 160, so as to reduce the metal debris in the lubricating oil in the transmission box 110, thereby improving the service life of the first transmission shaft 120 and the second transmission shaft 130.

[0026] In one embodiment, a first cylinder 170 and a second cylinder 180 are coaxially arranged inside the filter tube 150, the first cylinder 170 is arranged near the oil inlet 151, and the second cylinder 180 is arranged near the oil outlet 152. The inner diameters of the first cylinder 170 and the second cylinder 180 are the same, and the outer diameters of the first cylinder 170 and the second cylinder 180 are the same. The outer diameter of the first cylinder 170 is smaller than the inner diameter of the filter tube 150, so that there is a gap between the first cylinder 170 and the filter tube 150. Filter discs 160 are arranged inside the first cylinder 170 and the second cylinder 180. The first cylinder 170 and the second cylinder 180 are connected by a reversing disc 190, and the outer diameter of the reversing disc 190 is equal to the inner diameter of the filter tube 150. By setting the reversing disc 190, the first cylinder 170 and the second cylinder 180 can be stably located at the position of the axis of the filter tube 150. The reversing disc 190 has a first channel and a second channel inside. The first channel can connect the outside of the first cylinder 170 with the inside of the second cylinder 180, and the second channel can connect the outside of the second cylinder 180 with the inside of the first cylinder 170. When filtering the lubricating oil in the transmission case 110, the lubricating oil enters the inside of the filter tube 150 through the oil inlet 151. According to the position setting of the first cylinder 170 and the second cylinder 180, part of the lubricating oil enters the inside of the first cylinder 170, and the other part of the lubricating oil enters between the outer wall of the first cylinder 170 and the inner wall of the filter tube 150. At this time, the first channel and the second channel are in a conducting state. The lubricating oil entering the first cylinder 170 can enter between the outer wall of the second cylinder 180 and the inner wall of the filter tube 150 through the second channel, and enter between the outer wall of the second cylinder 180 and the inner wall of the filter tube 150. The lubricating oil between the inner side walls is filtered through the filter disc 160 inside the first cylinder 170; the lubricating oil entering between the outer side wall of the first cylinder 170 and the inner side wall of the filter tube 150 enters the second cylinder 180 through the first channel. When the lubricating oil flows inside the second cylinder 180, the filter disc 160 inside the second cylinder 180 filters the lubricating oil flowing inside the second cylinder 180, and then the lubricating oil inside the second cylinder 180 and the lubricating oil between the outer side wall of the second cylinder 180 and the inner side wall of the filter tube 150 are returned to the transmission case 110 through the oil outlet 152 of the filter tube 150. By providing the first cylinder 170, the second cylinder 180, the first channel, the second channel and the two filter discs 160, the lubricating oil entering the filter tube 150 is filtered separately, thereby ensuring that the lubricating oil entering the filter tube 150 can be filtered, and the service life of the filter disc 160 is increased.

[0027] In one embodiment, the reversing disc 190 also has a third channel and a fourth channel, the third channel can connect the outside of the first cylinder 170 with the outside of the second cylinder 180, and the fourth channel can connect the inside of the first cylinder 170 with the inside of the second cylinder 180. Specifically, the third channel and the fourth channel are connected or blocked at the same time, and the first channel and the second channel are connected or blocked at the same time. When the first channel and the second channel are in a conducting state, the third channel and the fourth channel are in a blocked state. On the contrary, when the third channel and the fourth channel are in a conducting state, the first channel and the second channel are in a blocked state. When filtering the lubricating oil in the transmission box 110, the third channel and the fourth channel are in a blocked state, and the first channel and the second channel are in a conducting state. After filtering the lubricating oil in the transmission box 110 for a period of time, the metal debris generated by the first transmission shaft 120 and the second transmission shaft 130 during the transmission process will adhere to the surface of the filter disc 160. In order to ensure that the filter disc 160 has a good filtering function, the filter disc 160 needs to be backwashed and cleaned regularly. When it is necessary to backwash and clean the filter disc 160, the filter tube 150 is detached from the transmission case 110, and then cleaning liquid is transported to the inside of the filter tube 150 through the oil outlet 152 of the filter tube 150. At this time, the first channel and the second channel are in a blocked state, and the third channel and the fourth channel are in a conducting state. The cleaning liquid enters the inside of the filter tube 150 through the oil outlet 152. According to the position setting of the first cylinder 170 and the second cylinder 180, part of the cleaning liquid enters the inside of the second cylinder 180, and the other part of the cleaning liquid enters between the outer wall of the second cylinder 180 and the inner wall of the filter tube 150. At this time, the third channel and the fourth channel are in a conducting state, and the first channel and the second channel are in a blocked state. The cleaning liquid entering the inside of the second cylinder 180 can enter the inside of the first cylinder 170 through the fourth channel, and the lubricating oil entering between the outer wall of the second cylinder 180 and the inner wall of the filter tube 150 enters between the outer wall of the first cylinder 170 and the inner wall of the filter tube 150 through the third channel. When the cleaning liquid flows in the second cylinder 180 and the first cylinder 170 in the reverse direction, the cleaning liquid backflushes and cleans the filter disc 160 inside the first cylinder 170 and the filter disc 160 inside the second cylinder 180, and then the cleaning liquid inside the first cylinder 170 and the cleaning liquid between the outer wall of the first cylinder 170 and the inner wall of the filter tube 150 are discharged from the filter tube 150 through the oil inlet 151 of the filter tube 150.

[0028] In one embodiment, the reversing disc 190 includes a first disc body 191 and a second disc body 192; the first disc body 191 is coaxially fixedly connected to the first cylinder body 170, the second disc body 192 is coaxially fixedly connected to the second cylinder body 180, and the first disc body 191 and the second disc body 192 are rotatably connected. Specifically, a limiting protrusion 220 is fixedly provided on the first disc body 191, and a limiting arc groove 210 is provided on the second disc body 192, and the limiting protrusion 220 is slidably provided in the limiting arc groove 210. The limiting arc groove 210 has a first end and a second end. When filtering the lubricating oil in the transmission box 110, the limiting protrusion 220 is at the first end of the limiting arc groove 210. At this time, the first channel and the second channel are in a conducting state, and the third channel and the fourth channel are in a blocked state. When cleaning the filter disc 160, the limiting protrusion 220 is at the second end of the limiting arc groove 210, the third channel and the fourth channel are in a conducting state, and the first channel and the second channel are in a blocked state. By setting the first disc body 191 and the second disc body 192 that can rotate relative to each other, when filtering the lubricating oil, the staff rotates the limiting protrusion 220 to the first end of the limiting arc groove 210. When backwashing and cleaning the filter disc 160, the staff rotates the limiting protrusion 220 to the second end of the limiting arc groove 210 to ensure that the first channel, the second channel, the third channel and the fourth channel are smoothly switched between blocking or conducting.

[0029] In one of the embodiments, since the first disk 191 and the second disk 192 are arranged inside the filter tube 150, when it is necessary to switch the conduction or blocking of the first channel, the second channel, the third channel and the fourth channel, it is inconvenient for the staff to manually drive the relative rotation of the first disk 191 and the disk. A first spiral plate 230 is provided on the outer wall of the first cylinder 170, and a second spiral plate 240 is provided on the outer wall of the second cylinder 180. The spiral directions of the first spiral plate 230 and the second spiral plate 240 are opposite. Specifically, when the lubricating oil enters the interior of the filter tube 150 from the oil inlet 151, the lubricating oil impacts the first spiral plate 230 on the outer wall of the first cylinder 170, and the flowing lubricating oil will cause the first cylinder 170 to have a tendency to rotate clockwise. When the lubricating oil flows through the outer wall of the second cylinder 180, the lubricating oil impacts the second spiral plate 240 on the outer wall of the second cylinder 180. Since the spiral direction of the first spiral plate 230 is opposite to that of the second spiral plate 240, the flowing lubricating oil will cause the second cylinder 180 to have a tendency to rotate counterclockwise. When the lubricating oil impacts the first spiral plate 230 and the second spiral plate 240, the limiting protrusion 220 on the first disk 191 stably stays at the first end of the limiting arc groove 210.

[0030] Furthermore, when the cleaning liquid enters the interior of the filter tube 150 from the oil outlet 152, the cleaning liquid impacts the second spiral plate 240 on the outer wall of the second cylinder 180, and the flowing cleaning liquid will cause the second cylinder 180 to have a tendency to rotate clockwise. When the cleaning liquid flows through the outer wall of the first cylinder 170, the cleaning liquid impacts the first spiral plate 230 on the outer wall of the first cylinder 170. Since the spiral direction of the first spiral plate 230 is opposite to that of the second spiral plate 240, the flowing cleaning liquid will cause the first cylinder 170 to have a tendency to rotate counterclockwise. When the cleaning liquid impacts the first spiral plate 230 and the second spiral plate 240, the limiting protrusion 220 on the first disk 191 stays stably at the second end of the limiting arc groove 210.

[0031] In one embodiment, the filter disc 160 is provided with a plurality of filter holes 161 penetrating the two end surfaces in the axial direction. The filter holes 161 on the filter disc 160 are set in a conical shape. The diameter of the filter hole 161 near the oil inlet 151 is smaller than the diameter near the oil outlet 152. The diameter of the filter hole 161 near the oil outlet 152 is smaller than the particle size of metal debris, ensuring that metal debris cannot enter the filter hole 161. The filter disc 160 in the first cylinder 170 is provided with a slag discharge pipe 250. The slag discharge pipe 250 is coaxially arranged with the filter disc 160. One end of the slag discharge pipe 250 penetrates the filter disc 160. The end of the slag discharge pipe 250 near the oil outlet 152 is flush with the end surface of the filter disc 160 near the oil outlet 152. The other end of the slag discharge pipe 250 extends toward the oil inlet 151. The inner diameter of the slag discharge pipe 250 is larger than the diameter of the filter hole 161 near the oil outlet 152. Furthermore, a first one-way valve is provided inside the slag discharge pipe 250, and the conduction direction of the first one-way valve is from the direction of the oil outlet 152 to the direction of the oil inlet 151. Specifically, when the lubricating oil enters the filter tube 150 through the oil inlet 151, under the action of the first one-way valve, the lubricating oil will not enter the slag discharge pipe 250, and when the cleaning liquid enters the filter tube 150 through the oil outlet 152, the cleaning liquid back-flushes the filter disc 160 inside the second cylinder 180, and the cleaning liquid carries metal debris into the first cylinder 170. Part of the cleaning liquid back-flushes the filter disc 160 inside the first cylinder 170, and another part of the cleaning liquid carries metal debris into the slag discharge pipe 250, and passes through the filter disc 160 inside the first cylinder 170 under the guidance of the slag discharge pipe 250, so that the metal debris intercepted by the two filter discs 160 are discharged from the filter tube 150 through the oil inlet 151.

[0032] In one embodiment, a mounting groove is provided on the first disk 191, and a connecting disk 310 is fixedly provided in the mounting groove. The first disk 191 and the connecting disk 310 are both hollow inside, and the inside of the first disk 191 and the inside of the connecting disk 310 are not connected to each other. A first liquid inlet 320 connecting the inside of the first disk 191 and the outside of the first cylinder 170 is provided on the end surface of the first disk 191 close to the oil inlet 151, and two first liquid outlets 330 connecting the inside of the first disk 191 and the external environment are provided on the end surface of the first disk 191 away from the oil inlet 151. The two first liquid outlets 330 are located in the same radial line of the first disk 191. When the lubricating oil enters the interior of the filter tube 150 from the oil inlet 151, the lubricating oil between the outer wall of the first cylinder 170 and the inner wall of the filter tube 150 can enter the interior of the first disk 191 through the first liquid inlet 320. A second liquid inlet 340 connecting the interior of the first cylinder 170 and the interior of the connecting disk 310 is provided on the end surface of the connecting disk 310 close to the oil inlet 151, and two second liquid outlets 350 connecting the interior of the connecting disk 310 and the external environment are provided on the end surface of the connecting disk 310 away from the oil inlet 151. The two second liquid outlets 350 are located in the same radial line of the connecting disk 310, and the distance between one of the first liquid outlets 330 and the axis of the first disk body 191 is equal to the distance between one of the second liquid outlets 350 and the axis of the first disk body 191, and the distance between the other first liquid outlet 330 and the axis of the first disk body 191 is equal to the distance between the other second liquid outlet 350 and the axis of the first disk body 191.

[0033] Furthermore, the second disk 192 is provided with a third liquid inlet 360 and a fourth liquid inlet 370 that penetrate through the two side walls in the axial direction of the second disk 192. The third liquid inlet 360 is connected to the inside of the second cylinder 180, and the fourth liquid inlet 370 is connected to the outside of the second cylinder 180. The third liquid inlet 360 and the fourth liquid inlet 370 are located in two different radial lines of the second disk 192, and the distance between the third liquid inlet 360 and the axis of the second disk 192 is smaller than the distance between the fourth liquid inlet 370 and the axis of the second disk 192. A first liquid outlet 330 close to the axis of the first disk 191 is connected to the third liquid inlet 360 to form a first channel, and a second liquid outlet 350 far from the axis of the first disk 191 is connected to the fourth liquid inlet 370 to form a second channel. A first liquid outlet 330 away from the axis of the first disk body 191 is connected to the fourth liquid inlet 370 to form the third channel, and a second liquid outlet 350 close to the axis of the first disk body 191 is connected to the third liquid inlet 360 to form the fourth channel.

[0034] Further, the first channel, the second channel, the third channel and the fourth channel are all provided with multiple groups, and the end surface of the first disk body 191 close to the oil inlet 151 is provided with multiple groups of first liquid inlets 320, and the end surface of the first disk body 191 away from the oil inlet 151 is provided with multiple groups of first liquid outlets 330, and the multiple groups of first liquid outlets 330 are evenly distributed around the circumferential direction of the first disk body 191; the end surface of the connecting disk 310 away from the oil inlet 151 is provided with multiple groups of second liquid outlets 350, and the multiple groups of second liquid outlets 350 are evenly distributed around the circumferential direction of the connecting disk 310, and each group of second liquid outlets 350 is alternately distributed with a group of first liquid outlets 330. The second disk body 192 is provided with a plurality of third liquid inlets 360 and a plurality of fourth liquid inlets 370, and the plurality of third liquid inlets 360 and the plurality of fourth liquid inlets 370 are evenly distributed around the circumferential direction of the second disk body 192. In any radial line of the second disk body 192, there is only one third liquid inlet 360 or fourth liquid inlet 370. When the first disk body 191 and the second disk body 192 rotate relative to each other, the first channel and the second channel are simultaneously opened or blocked, and the third channel and the fourth channel can be blocked or opened, and a plurality of groups of first channels, second channels, third channels and fourth channels are provided to increase the flow rate of the lubricating oil or the cleaning liquid.

[0035] In one embodiment, the inner wall of the filter tube 150 is provided with two sections of first spiral grooves 410, and the first spiral grooves 410 are spaced apart along the axial direction of the filter tube 150; the outer wall of the filter tube 150 is provided with two sections of second spiral grooves 420, and the second spiral grooves 420 are spaced apart along the axial direction of the filter tube 150; the spiral directions of the two first spiral grooves 410 are opposite, and the spiral directions of the two second spiral grooves 420 are opposite; the outer wall of the first cylinder 170 corresponds to a first spiral groove 410 and a second spiral groove 420, and the outer wall of the second cylinder 180 corresponds to a first spiral groove 410 and a second spiral groove 420; the spiral directions of the first spiral groove 410 and the second spiral groove 420 corresponding to the outer side of the first cylinder 170 are the same, and the spiral directions of the first spiral groove 410 and the second spiral groove 420 corresponding to the outer side of the second cylinder 180 are the same. When the lubricating oil contacts the first spiral groove 410 , the contact area between the lubricating oil and the filter tube 150 is increased by providing the first spiral groove 410 , and the contact area between the filter tube 150 and the air is increased by providing the second spiral groove 420 , thereby increasing the efficiency of heat dissipation of the lubricating oil.

[0036] In one embodiment, the oil pumping member includes two oil pumping pipes 510, both of which are vertically arranged inside the transmission case 110, and a connecting pipe 530 is arranged inside the transmission case 110, and the connecting pipe 530 is horizontally arranged on the upper end surface of the transmission case 110, and both ends of the connecting pipe 530 are simultaneously connected to the upper ends of the two oil pumping pipes 510, and the middle part of the connecting pipe 530 is connected to the oil inlet 151 of the filter pipe 150. A conveying auger 520 is arranged in each oil pumping pipe 510, and the spiral directions of the two conveying augers 520 are opposite. A transmission member is arranged between the first transmission shaft 120 and the two conveying augers 520, and the transmission member is used to rotate the two conveying augers 520 simultaneously when the first transmission shaft 120 rotates, and the two conveying augers 520 rotate in the same direction. Two second one-way valves 531 are provided in the connecting pipe 530. The two second one-way valves 531 are arranged at intervals and are distributed on both sides of the middle part of the connecting pipe 530. The conduction direction of the second one-way valve 531 is that the end of the connecting pipe 530 points to the middle part of the connecting pipe 530. When the two conveying augers 520 rotate in the same direction, since the spiral directions of the two conveying augers 520 are opposite, one of the conveying augers 520 will convey lubricating oil to the inside of the connecting pipe 530, and the other conveying augers 520 will have a tendency to convey the lubricating oil inside the connecting pipe 530 to the outside. However, under the action of the second one-way valve 531, the other conveying augers 520 cannot convey the lubricating oil inside the connecting pipe 530 to the outside, thereby ensuring that when the two conveying augers 520 are conveyed in the same direction, there is a conveying augers 520 that conveys lubricating oil to the inside of the connecting pipe 530.

[0037] In one embodiment, the transmission member includes a transmission gear 540, a fixed gear 550 and a transmission belt 560. The ends of the two conveying augers 520 are coaxially fixedly provided with a fixed disk 570, and the transmission belt 560 is simultaneously wound around the two fixed disks 570. The fixed gear 550 is coaxially fixedly connected to the second transmission shaft 130, and the transmission gear 540 is rotatably connected to the inner wall of the transmission box 110, and the transmission gear 540 is always meshed with the fixed gear 550. The transmission gear 540 is coaxially fixedly connected to a driving disk 580, the diameter of the driving disk 580 is larger than the diameter of the fixed disk 570, and the driving disk 580 is arranged between the two fixed disks 570. The transmission sleeve is simultaneously wound around the two fixed disks 570 and one driving disk 580. When the driving disk 580 rotates, the two fixed disks 570 rotate in the same direction through the transmission of the transmission belt 560, and each fixed disk 570 drives a conveying augers 520 to rotate synchronously.

[0038] In one embodiment, an installation box 590 is provided on the outer side of the transmission box 110, the driving motor 140 and the reducer 141 are fixedly connected to the installation box 590, and the second transmission shaft 130 passes through the side wall of the installation box 590 and is connected to the rotating shaft of the valve. By setting up the installation box 590, sand and gravel in the external environment can be prevented from damaging the transmission box 110.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve electric actuator, characterized in that: include: A transmission box, wherein a horizontal first transmission shaft and a vertical second transmission shaft are arranged in the transmission box, a power source for starting the rotation of the first transmission shaft is arranged outside the transmission box, and the transmission box is filled with lubricating oil; the second transmission shaft is coaxially fixedly connected with the rotating shaft of the valve; An oil filter, the oil filter includes an oil pump and a filter tube, the filter tube is arranged on the outside of the transmission case, the filter tube has an oil inlet and an oil outlet, the oil pump is used to pump the lubricating oil in the transmission case into the filter tube through the oil inlet when the first transmission shaft rotates; the oil outlet of the filter tube is connected to the inside of the transmission case; a filter disc is arranged inside the filter tube, and the filter disc can filter the lubricating oil passing through the filter tube.

2. The electric valve actuator according to claim 1, characterized in that: A first cylinder and a second cylinder are coaxially arranged inside the filter tube, the first cylinder is close to the oil inlet, and the second cylinder is close to the oil outlet; the first cylinder and the second cylinder are connected by a reversing disc; the filter disc is arranged inside the first cylinder and the second cylinder; the outer diameter of the first cylinder is the same as the outer diameter of the second cylinder, and the outer diameter of the first cylinder is smaller than the inner diameter of the filter tube; the outer diameter of the reversing disc is equal to the inner diameter of the filter tube, and the reversing disc has a first channel and a second channel inside, the first channel can connect the outside of the first cylinder with the inside of the second cylinder, and the second channel can connect the outside of the second cylinder with the inside of the first cylinder; when the lubricating oil in the transmission box is filtered, the lubricating oil in the filter tube flows from the oil inlet to the oil outlet, and the first channel and the second channel are in a conducting state.

3. The electric valve actuator according to claim 2, characterized in that: The reversing disc also has a third channel and a fourth channel, the third channel can connect the outside of the first cylinder with the outside of the second cylinder, and the fourth channel can connect the inside of the first cylinder with the inside of the second cylinder; the third channel and the fourth channel are blocked or connected at the same time, and the first channel and the second channel are blocked or connected at the same time; when the lubricating oil in the transmission box is filtered, the third channel and the fourth channel are in a blocked state; when the filter disc is cleaned, cleaning liquid is transported into the filter tube through the oil outlet, the first channel and the second channel are in a blocked state, and the third channel and the fourth channel are in a connected state.

4. The electric valve actuator according to claim 3, characterized in that: The reversing plate includes a first plate body and a second plate body; the first plate body is coaxially fixedly connected to the first cylinder body, the second plate body is coaxially fixedly connected to the second cylinder body, and the first plate body and the second plate body are rotatably connected; a limiting protrusion is fixedly arranged on the first plate body, and a limiting arc groove is arranged on the second plate body, and the limiting protrusion is slidably arranged in the limiting arc groove, and the limiting arc groove has a first end and a second end, and when the lubricating oil in the transmission box is filtered, the limiting protrusion is at the first end, and the first channel and the second channel are in a conducting state; when the filter plate is cleaned, the limiting protrusion is at the second end, and the third channel and the fourth channel are in a conducting state.

5. The electric valve actuator according to claim 4, characterized in that: A first spiral plate is disposed on the outer side wall of the first cylinder, and a second spiral plate is disposed on the outer side wall of the second cylinder. The spiral directions of the first spiral plate and the second spiral plate are opposite.

6. The electric valve actuator according to claim 4, characterized in that: The filter disc is provided with a conical filter hole, the diameter of the filter hole close to the oil inlet is smaller than the diameter close to the oil outlet, the filter disc in the first cylinder is provided with a slag discharge pipe, one end of the slag discharge pipe penetrates the filter disc, the slag discharge pipe extends toward the oil inlet, and the end of the slag discharge pipe is flush with the end of the filter disc away from the oil inlet; a first one-way valve is provided inside the slag discharge pipe, and the conduction direction of the first one-way valve is from the direction of the oil outlet to the direction of the oil inlet.

7. The electric valve actuator according to claim 4, characterized in that: The first disk body is provided with a mounting groove, a connecting disk is fixedly arranged in the mounting groove, the first disk body and the connecting disk are both hollow inside, a first liquid inlet connecting the inside of the first disk body and the outside of the first cylinder body is provided on the end surface of the first disk body close to the oil inlet, two first liquid outlets connecting the inside of the first disk body and the external environment are provided on the end surface of the first disk body away from the oil inlet, and the two first liquid outlets are located in the same radial line of the first disk body; a second liquid inlet connecting the inside of the first cylinder body and the inside of the connecting disk is provided on the end surface of the connecting disk close to the oil inlet, and two second liquid outlets connecting the inside of the connecting disk and the external environment are provided on the end surface of the connecting disk away from the oil inlet, and the two second liquid outlets are located in the same radial line of the connecting disk; The second disk body is provided with a third liquid inlet and a fourth liquid inlet penetrating through its side wall, the third liquid inlet is communicated with the inside of the second cylinder body, the fourth liquid inlet is communicated with the outside of the second cylinder body, and the third liquid inlet and the fourth liquid inlet are located in two different radial lines of the second disk body; The first liquid outlet is connected with the third liquid inlet to form the first channel, and the second liquid outlet is connected with the fourth liquid inlet to form the second channel; the first liquid outlet is connected with the fourth liquid inlet to form the third channel, and the second liquid outlet is connected with the third liquid inlet to form the fourth channel.

8. The electric valve actuator according to claim 2, characterized in that: The inner wall of the filter tube is provided with two sections of first spiral grooves, and the outer wall of the filter tube is provided with two sections of second spiral grooves, the spiral directions of the two first spiral grooves are opposite, the spiral directions of the two second spiral grooves are opposite, the spiral directions of the first spiral groove and the second spiral groove corresponding to the outer side of the first cylinder are the same, and the spiral directions of the first spiral groove and the second spiral groove corresponding to the outer side of the second cylinder are the same.

9. The electric valve actuator according to claim 1, characterized in that: The oil pumping part includes two oil pumping pipes, and the two oil pumping pipes are vertically arranged inside the transmission box. A connecting pipe is arranged inside the transmission box, and the connecting pipe is connected with the upper ends of the two oil pumping pipes at the same time, and the middle part of the connecting pipe is connected with the oil inlet of the filter tube; a conveying auger is arranged in each of the oil pumping pipes, and the spiral directions of the two conveying augers are opposite. A transmission part is arranged between the first transmission shaft and the two conveying augers, and the transmission part is used for rotating the two conveying augers at the same time when the first transmission shaft rotates, and the rotation directions of the two conveying augers are the same; two second one-way valves are arranged in the connecting pipe, and the conduction direction of the second one-way valve is that the end of the connecting pipe points to the middle part of the connecting pipe.

10. The electric valve actuator according to claim 9, characterized in that: The transmission member includes a transmission gear, a fixed gear and a transmission belt. The ends of the two conveying augers are coaxially fixed with fixed disks. The transmission belt is simultaneously wrapped around the two fixed disks. The fixed gear is coaxially fixedly connected to the second transmission shaft. The transmission gear is rotatably connected to the inner wall of the transmission box, and the transmission gear is meshed with the fixed gear. The transmission gear is coaxially fixedly connected to a driving disk, and the driving disk is used to drive the transmission belt to move.

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