Manual speedup valve electric actuator

Abstract

The invention relates to the field of valve transmission devices, in particular to a manual speed increasing valve electric actuator which comprises a support, the two ends of the support are in a circular arc shape and a rectangular shape respectively, a cylindrical shell is arranged on the side, located at the circular arc end, of the support, and the opening end of the shell is coaxially connected with the circular arc end of the support in a sleeved mode. A first spring is arranged between the opening edge of the shell and the support, and the opening end of the shell abuts against the support in an attached mode. According to the device, the transmission characteristic of a planetary gear structure is utilized, when a hand wheel rotates in different directions, a friction plate is selectively combined with an inner shell in the planetary gear structure in a matched mode, the planetary gear structure outputs a high rotating speed by driving the inner shell to rotate, or the friction plate and a lead screw control an output shaft and the inner shell at the same time, and extrusion force of an outer shell and a support is reduced; the planetary gear structure integrally rotates, so that one-to-one rotating speed output is realized, and the effects that the actuator is labor-saving to operate when the closing and opening resistance of the valve is relatively large and convenient and efficient to operate when the action resistance of the valve is relatively small are realized.

Description

Technical Field

[0001] The invention relates to the field of valve transmission devices, in particular to a manual speed-increasing valve electric actuator. Background Art

[0002] There are generally two ways to connect the handwheel of a large manual worm gear valve. One is that the handwheel is connected to the worm gear, which drives the valve faster but is very laborious and often requires an F plate to act as a pry bar to turn it. The other is that the handwheel is connected to the worm gear. Although the handwheel drives the valve through the worm gear, it is labor-saving and can be operated directly without the aid of a pry bar, but it requires many turns to close or open the valve.

[0003] Therefore, in subsequent large-scale manual worm gears, a manual / electric integrated transmission device with an appropriate speed ratio is added between the handwheel and the worm, which can electrically drive the valve to open and close when there is electricity, and the handwheel can also output a higher speed when the power is off. However, the speed ratio of the transmission device is fixed, and the movement resistance of the valve in different positions and states is different. For example, when the valve is reopened after being closed for a long time, there is an obvious adhesion between the sealing strip and the sealing frame, and in the closed state, the contact area between the sealing strip and the sealing frame is large and is in a static friction state, so the movement resistance of the valve is large, while the movement resistance of the sliding friction after the valve is started is relatively small, or there is a pressure difference on both sides of the valve after it is closed. In this case, it is also very difficult to open the valve under the pressure difference. Therefore, after using a transmission device with an output rotation speed increase, although shaking the handwheel can drive the worm to rotate faster, it will make it difficult to manually turn the handwheel when the valve is opened from a fully closed state.

[0004] In summary, in order to solve the above problems, we propose a manual speed-increasing valve electric actuator with a variable speed ratio. Summary of the invention

[0005] In view of the fact that the manual / electric dual-purpose transmission device used in the above-mentioned large manual worm gear valve or in the prior art has a single transmission speed ratio, resulting in the problem of difficulty in manually opening the valve from a closed state, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a manual speed-increasing valve electric actuator.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a manual speed-increasing valve electric actuator, comprising a bracket, wherein the two ends of the bracket are respectively arc-shaped and rectangular, and the bracket is provided with a cylindrical outer shell on one side of the arc end, the open end of the outer shell is coaxially sleeved with the arc end of the bracket, a spring is provided between the opening edge of the outer shell and the bracket, and the open end of the outer shell is in contact with the bracket; the outer shell is sleeved with a cylindrical inner shell, the outer shell is rotatably connected to an output shaft along its axial direction, and the outer shell is rotatably connected to a gear between the inner circumferential wall of the inner shell and the output shaft. The gear meshes with the output shaft, and the gear meshes with the inner wall of the inner shell. The arc end of the bracket is coaxially slidably sleeved with a screw, one end of the screw is coaxially threadedly connected with the inner shell, and the other end of the screw is threadedly connected with a handwheel, the screw is located between the handwheel and the bracket and is sleeved with a spring 2, one end of the output shaft located in the inner shell is coaxially fixedly connected with a friction plate 1, and one end of the screw located in the inner shell is coaxially fixedly connected with a friction plate 2; the bracket is vertically inserted with a cylindrical steel ball roller, and the steel ball end of the steel ball roller contacts the outer shell, and the steel ball roller is located between the handwheel and the bracket.

[0008] As a preferred solution of the manual speed-increasing valve electric actuator of the present invention, a motor is fixedly connected to one end of the rectangular shape of the bracket, and the rotating shaft of the motor and the hand wheel are connected by a belt transmission.

[0009] As a preferred solution of the manual speed-increasing valve electric actuator of the present invention, a cone is provided inside the opening of the shell, and the bracket is provided with an annular cone on one side of the shell, and the cone and the cone are fitted and sleeved.

[0010] As a preferred solution of the manual speed-increasing valve electric actuator of the present invention, the steel ball rollers are distributed in a ring array with respect to the housing, and a spring three is sleeved between the tail end of the steel ball roller and the bracket.

[0011] As a preferred solution of the manual speed-increasing valve electric actuator of the present invention, the threads of the screw rod are opened at both ends of the screw rod, and the threads at both ends of the screw rod have the same rotation direction. The screw rod is located between spring 2 and the handwheel and is sleeved with a gasket, and the gasket is slidably connected to the screw rod along the axial direction of the screw rod.

[0012] As a preferred solution of the manual speed-increasing valve electric actuator of the present invention, a plane thrust bearing 1 is arranged between the inner edge of the outer shell opening and the inner shell, and a plane thrust bearing 2 is arranged between the outer shell opening end and the bracket.

[0013] As a preferred solution of the manual speed-increasing valve electric actuator of the present invention, wherein: the arc end of the bracket is fixedly connected with a ring, the ring is coaxially sleeved with the outer shell, and the inner wall of the ring is provided with a retaining spring, and the spring one is pre-loaded and arranged between the retaining spring and the planar thrust bearing two, the elastic force of the spring one is greater than that of the spring two, and the elastic force of the spring two is greater than that of the spring three.

[0014] As a preferred solution of the manual speed-increasing valve electric actuator of the present invention, wherein: the output shaft is coaxially connected to a worm, and the worm is meshed with a worm wheel.

[0015] As a preferred solution of the manual speed increasing valve electric actuator of the present invention, the gears are distributed in a ring array with respect to the outer shell, and a planetary gear structure is formed between the gears, the output shaft and the inner shell.

[0016] As a preferred solution of the manual speed-increasing valve electric actuator of the present invention, the outer edge of the bracket is provided with a mounting groove, and the edge of the hand wheel is vertically rotatably provided with a handle.

[0017] The beneficial effects of the manual speed-increasing valve electric actuator of the present invention are as follows: the device utilizes the transmission characteristics of the planetary gear structure. When the hand wheel rotates in different directions, the friction plate cooperates with the screw rod to combine with the inner shell in the planetary gear structure, and drives the inner shell to rotate to allow the planetary gear structure to output a high speed, or the friction plate and the screw rod simultaneously control the output shaft and the inner shell, and reduce the squeezing force between the outer shell and the bracket, so that the planetary gear structure rotates as a whole, thereby achieving a one-to-one speed output, and further achieving the effect of saving effort in operation when the resistance to opening the valve from closed to open is large, and convenient and efficient operation when the resistance to valve movement is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the electric actuator for the manual speed increasing valve.

[0020] Figure 2 for Figure 1 Schematic diagram of the structure from another side perspective.

[0021] Figure 3 This is a structural cross-sectional view of the manual speed-increasing valve electric actuator.

[0022] Figure 4 for Figure 3 Structural breakdown diagram.

[0023] Figure 5 This is a structural schematic diagram of the manual speed-increasing valve electric actuator connected to the worm gear assembly.

[0024] Figure 6 for Figure 5 Schematic diagram of the structure after removing the worm gear housing.

[0025] In the figure: 100, bracket; 101, outer shell; 102, spring one; 103, inner shell; 104, output shaft; 105, gear; 106, screw rod; 107, hand wheel; 108, spring two; 109, friction plate one; 110, friction plate two; 111, steel ball roller; 112, motor; 113, spring three; 114, gasket; 115, plane thrust bearing one; 116, plane thrust bearing two; 117, retaining spring; 118, worm; 119, worm wheel; 100a, cone; 100b, ring; 100c, mounting groove; 100d, handle; 101a, cone mouth. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] Example, see Figure 1 to Figure 6 This embodiment provides a manual speed-increasing valve electric actuator, which can provide two-stage transmission speed ratio when opening the valve, so as to achieve the effect of fast and labor-saving when the valve is opened from a closed state. Figure 1 As shown, it includes a bracket 100, the two ends of the bracket 100 are arc-shaped and rectangular, respectively, and the bracket 100 is provided with a cylindrical shell 101 on one side of the arc end, and the open end of the shell 101 is coaxially sleeved with the arc end of the bracket 100, as shown in FIG. Figure 3As shown, a spring 102 is arranged between the opening edge of the outer shell 101 and the bracket 100, and the opening end of the outer shell 101 is in contact with the bracket 100; the outer shell 101 is sleeved with a cylindrical inner shell 103, and the outer shell 101 is rotatably connected with an output shaft 104 along its axial direction, and the outer shell 101 is located between the inner circumferential wall of the inner shell 103 and the output shaft 104 and is rotatably connected with a gear 105, the gear 105 meshes with the output shaft 104, and the gear 105 meshes with the inner wall of the inner shell 103, and the arc end of the bracket 100 is coaxially slidably sleeved with a screw rod 106, one end of the screw rod 106 is rotatably connected with the inner shell 103, and one end of the screw rod 106 is rotatably connected with the inner shell 103. The shell 103 is coaxially threadedly connected, and the other end of the screw rod 106 is threadedly connected to the handwheel 107, the screw rod 106 is located between the handwheel 107 and the bracket 100 and is sleeved with a spring 2 108, one end of the output shaft 104 located in the inner shell 103 is coaxially fixedly connected to a friction plate 109, and one end of the screw rod 106 located in the inner shell 103 is coaxially fixedly connected to a friction plate 2 110; the bracket 100 is vertically inserted with a cylindrical steel ball roller 111, and the steel ball end of the steel ball roller 111 contacts the outer shell 101, and the steel ball roller 111 is located between the handwheel 107 and the bracket 100.

[0028] Specifically, Figure 1 , Figure 2 As shown, a motor 112 is fixedly connected to one end of the rectangular shape of the bracket 100, and a rotating shaft of the motor 112 is connected to the hand wheel 107 in a belt transmission manner, as shown in FIG. Figure 4 As shown, a cone 101a is provided inside the opening of the housing 101, and a ring-shaped cone 100a is provided on one side of the housing 101 of the bracket 100, and the cone 100a and the cone 101a are fitted and sleeved, as shown in FIG. Figure 3 As shown, the steel ball rollers 111 are distributed in a circular array with respect to the housing 101, and a spring 3 113 is sleeved between the tail end of the steel ball roller 111 and the bracket 100, the threads of the screw rod 106 are opened at both ends of the screw rod 106, and the threads at both ends of the screw rod 106 have the same rotation direction, the screw rod 106 is sleeved with a gasket 114 between the spring 2 108 and the hand wheel 107, and the gasket 114 is slidably connected to the screw rod 106 along the axial direction of the screw rod 106, A plane thrust bearing 115 is arranged between the inner edge of the opening of the outer shell 101 and the inner shell 103, and a plane thrust bearing 2 116 is arranged between the open end of the outer shell 101 and the bracket 100, and a circular ring 100b is fixedly connected to the arc end of the bracket 100, and the circular ring 100b is coaxially sleeved with the outer shell 101, and a retaining spring 117 is arranged on the inner wall of the circular ring 100b, and the spring 102 is pre-loaded and arranged between the retaining spring 117 and the plane thrust bearing 2 116.

[0029] Furthermore, the elastic force of the spring 102 is greater than that of the spring 2 108, and the elastic force of the spring 2 108 is greater than that of the spring 3 113. The gears 105 are distributed in a ring array with respect to the housing 101, and a planetary gear structure is formed between the gears 105, the output shaft 104 and the inner housing 103. A mounting groove 100c is provided on the outer edge of the bracket 100, and a handle 100d is vertically rotated and installed on the edge of the hand wheel 107. Figure 5 and Figure 6 As shown, the output shaft 104 is coaxially connected to a worm 118 , and the worm 118 is meshed with a worm wheel 119 .

[0030] The present invention provides a manual speed-increasing valve electric actuator, which mainly integrates a handwheel 107, a motor 112, a two-stage transmission structure with a variable transmission ratio and an output shaft 104, wherein the output shaft 104 is used to connect the worm of the valve, the bracket 100 is used to install the actuator, and the motor 112 is used to replace manual driving of the handwheel 107 to rotate through a belt drive, or by manually rotating the handwheel 107, the output shaft 104 is driven by the transmission structure to drive the worm to rotate.

[0031] The working principle of the actuator of the present invention: When the hand wheel 107 is rotated, the hand wheel 107 drives the screw rod 106 to rotate, and the screw rod 106 rotates relative to the inner shell 103 and drives the friction plate 2 110 to move relative to the friction plate 1 109 and the inner shell 103 along the axial direction. When the friction plate 2 110 is combined with the inner shell 103, it drives the inner shell 103 to rotate, and the inner shell 103 drives the output shaft 104 to rotate through the gear 105, thereby increasing the output speed, so that the worm of the valve rotates at a faster speed relative to the hand wheel 107. During the process, the outer shell 101 is pressed against the bracket 100. When the friction plate 2 110 is engaged with the friction plate 1 109, the friction plate 2 110 and the screw 106 will jam the planetary gear structure, and at the same time, the housing 101 no longer presses the bracket 100, so that the housing 101, the inner housing 103, the screw 106, the gear 105 and the output shaft 104 rotate as a whole. At this time, the speed ratio of the output shaft 104 and the speed ratio of the hand wheel 107 is one to one. Compared with the output rotation speed increase transmission, the one to one transmission ratio is obviously relatively labor-saving and can be used to open the valve from a closed state; Therefore, the actuator of the device needs to automatically switch to a one-to-one transmission ratio mode when the resistance to the valve opening action is large, and needs to automatically switch to a rotation speed increase transmission ratio mode when the resistance during the valve movement is small; by Figure 1 Take the perspective as an example, when the hand wheel 107 is rotated counterclockwise to open the valve plate: Figure 3When the valve plate has a large resistance to opening, the output shaft 104, the gear 105 and the inner shell 103 are regarded as a whole and are used as a reference system. The hand wheel 107 is rotated counterclockwise to move along the screw rod 106 thread in the direction of the compression spring 2 108. Since the hand wheel 107 is movable relative to the bracket 100 in the axial direction of the screw rod 106, and the spring 2 108 squeezes the hand wheel 107 through the gasket 114, the hand wheel 107 rotates clockwise away from the bracket 100. At this time, the hand wheel 107 is rotated counterclockwise, which can generate a large friction force between the hand wheel 107 and the screw rod 106, so that the hand wheel 107 drives the screw rod 106 to rotate into the inner shell 103, pushing the friction plate 2 110 to engage with the friction plate 1 109. When the friction plate 2 110 is engaged with the friction plate 1 109, the hand wheel 107 continues to rotate. 7 makes the hand wheel 107 further compress the spring 2 108 along the screw rod 106 thread, so that the hand wheel 107 moves toward the bracket 100, until the hand wheel 107 hits the tail end of the steel ball roller 111 and compresses the spring 3 113, and the steel column of the steel ball roller 111 hits the housing 101, with a tendency to push the housing 101 away from the bracket 100. At this time, it should be noted that the housing 101 cannot be pushed away from the bracket 100 by the steel ball roller 111, and the housing 101 still maintains a close contact with the bracket 100, but the pressure of the housing 101 on the bracket 100 is greatly reduced, so that the housing 101 slips relative to the bracket 100, so that the housing 101, the inner housing 103, the screw rod 106, the gear 105 and the output shaft 104 rotate as a whole, and the worm of the valve is driven to rotate with a one-to-one transmission ratio; Since the pressure of friction plate 2 110 on friction plate 1 109 comes from the spiral movement trend of screw rod 106 relative to inner shell 103, when the rotation resistance of the worm of the valve is small and screw rod 106 can easily drive the inner shell 103 to rotate, it will no longer provide sufficient extrusion force for friction plate 2 110. At this time, under the condition of force balance, the component force of the screw rod 106 thread along the tangential direction of the inner shell 103 drives the inner shell 103 to rotate, and the output shaft 104 enters the transmission speed increase state.

[0032] by Figure 1Taking the perspective as an example, when the handwheel 107 is rotated clockwise to close the valve plate: the handwheel 107 is frictional with the screw rod 106, or the handwheel 107 rotates relative to the screw rod 106 to the dead point of the outer end of the screw rod 106 thread, the handwheel 107 no longer conflicts with the ball roller 111, and the spring 102 presses the housing 101 against the bracket 100, so that the housing 101 does not move relative to the bracket 100, then the handwheel 107 drives the screw rod 106 to rotate clockwise, and the housing 101 is still affected by the worm rotation resistance of the valve through the gear 105 and the output shaft 104, and can be regarded as a whole and used as a reference system. At this time, the screw rod 106 is rotated outward from the inner housing 103 until the friction plate 2 110 is combined with the inner housing 103, driving the inner housing 103 to rotate, and the inner housing 103 drives the output shaft 104 to rotate through the gear 105 to increase the speed of the output shaft 104 with the planetary gear structure.

[0033] The actuator utilizes the change in friction between various components to achieve operation, so a planar thrust bearing 115 and a planar thrust bearing 2 116 are added to the parts that are not expected to be affected by friction, so as to avoid or reduce the interference of other friction forces other than the required functional friction force on the actuator action.

[0034] When the motor 112 and the belt drive structure are used for electric operation, the operating characteristics of the actuator are consistent with the above-mentioned manual operation hand wheel 107.

[0035] In summary, the device utilizes the transmission characteristics of the planetary gear structure. When the hand wheel 107 rotates in different directions, the friction plate cooperates with the screw rod 106 to selectively combine with the inner shell 103 in the planetary gear structure, and drives the inner shell 103 to rotate to allow the planetary gear structure to output a high speed, or the friction plate and the screw rod 106 simultaneously control the output shaft 104 and the inner shell 103, and reduce the squeezing force between the outer shell 101 and the bracket 100, so that the planetary gear structure rotates as a whole, thereby achieving a one-to-one speed output, and further achieving the effect of saving effort in operation when the valve has a large resistance to opening from a closed state, and being convenient and efficient in operation when the valve movement resistance is small.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A manual speed-increasing valve electric actuator, characterized in that: The invention comprises a bracket (100), wherein two ends of the bracket (100) are respectively in an arc shape and a rectangular shape, and a cylindrical shell (101) is provided on one side of the arc end of the bracket (100), an open end of the shell (101) is coaxially sleeved with the arc end of the bracket (100), a spring (102) is provided between the opening edge of the shell (101) and the bracket (100), and the open end of the shell (101) is in close contact with the bracket (100); The outer shell (101) is sleeved with a cylindrical inner shell (103); the outer shell (101) is rotatably connected to an output shaft (104) along its axial direction; the outer shell (101) is located between the inner circumferential wall of the inner shell (103) and the output shaft (104) and is rotatably connected to a gear (105); the gear (105) meshes with the output shaft (104); the gear (105) meshes with the inner wall of the inner shell (103); a screw rod (106) is coaxially slidably sleeved on the arc end of the bracket (100); the screw rod One end of the screw rod (106) is coaxially threadedly connected to the inner shell (103), and the other end of the screw rod (106) is threadedly connected to a hand wheel (107), the screw rod (106) is located between the hand wheel (107) and the bracket (100) and is sleeved with a second spring (108), one end of the output shaft (104) located in the inner shell (103) is coaxially fixedly connected to a first friction plate (109), and one end of the screw rod (106) located in the inner shell (103) is coaxially fixedly connected to a second friction plate (110); The bracket (100) is vertically plugged with a cylindrical steel ball roller (111), and the steel ball end of the steel ball roller (111) abuts against the housing (101), and the steel ball roller (111) is located between the hand wheel (107) and the bracket (100).

2. The manual speed-increasing valve electric actuator according to claim 1, characterized in that: A motor (112) is fixedly connected to one rectangular end of the bracket (100), and a rotating shaft of the motor (112) and a hand wheel (107) are connected in a belt transmission manner.

3. The manual speed-increasing valve electric actuator according to claim 2, characterized in that: A cone opening (101a) is provided inside the opening of the shell (101), and a ring-shaped cone (100a) is provided on one side of the shell (101) of the bracket (100), and the cone opening (101a) and the cone opening (101a) are fitted and sleeved.

4. The manual speed-increasing valve electric actuator according to claim 3, characterized in that: The steel ball rollers (111) are distributed in a ring array relative to the housing (101), and a spring three (113) is sleeved between the tail end of the steel ball roller (111) and the bracket (100).

5. The manual speed-increasing valve electric actuator according to claim 4, characterized in that: The threads of the screw rod (106) are provided at both ends of the screw rod (106), and the threads at both ends of the screw rod (106) have the same rotation direction. The screw rod (106) is located between the second spring (108) and the hand wheel (107), and a gasket (114) is sleeved thereon. The gasket (114) is slidably connected to the screw rod (106) along the axial direction of the screw rod (106).

6. The manual speed-increasing valve electric actuator according to claim 5, characterized in that: A first planar thrust bearing (115) is provided between the inner edge of the opening of the outer shell (101) and the inner shell (103), and a second planar thrust bearing (116) is provided between the opening end of the outer shell (101) and the bracket (100).

7. The manual speed-increasing valve electric actuator according to claim 1, characterized in that: The circular arc end of the bracket (100) is fixedly connected to a circular ring (100b), the circular ring (100b) is coaxially sleeved with the housing (101), and a retaining spring (117) is provided on the inner wall of the circular ring (100b), and the spring one (102) is pre-loaded and arranged between the retaining spring (117) and the plane thrust bearing two (116), the elastic force of the spring one (102) is greater than that of the spring two (108), and the elastic force of the spring two (108) is greater than that of the spring three (113).

8. The manual speed-increasing valve electric actuator according to claim 7, characterized in that: The output shaft (104) is coaxially connected to a worm (118), and the worm (118) is meshed with a worm wheel (119).

9. The manual speed-increasing valve electric actuator according to claim 1, characterized in that: The gears (105) are distributed in a ring array with respect to the outer shell (101), and a planetary gear structure is formed between the gears (105), the output shaft (104) and the inner shell (103).

10. The manual speed-increasing valve electric actuator according to claim 9, characterized in that: An outer edge of the bracket (100) is provided with a mounting groove (100c), and an edge of the hand wheel (107) is provided with a handle (100d) which can be rotated vertically.

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