Electric actuator and vacuum regulating valve

Abstract

The utility model relates to the technical field of uranium concentration processes, and provides an electric actuator and a vacuum regulating valve. The electric actuator comprises a supporting sleeve, a motor, a stroke rod and a transmission assembly. The supporting sleeve is provided with a first supporting end and a second supporting end. The motor is arranged at the first supporting end. The stroke rod is arranged at the second supporting end. The transmission assembly comprises a transmission nut and a sliding part, the transmission nut is rotationally arranged in the supporting sleeve and connected with the motor, the sliding part is slidably arranged along the stroke rod, one end of the sliding part is in threaded fit with the transmission nut, and the other end of the sliding part is used for being connected with the valve rod. By arranging the supporting sleeve, the transmission nut in the transmission assembly is rotationally arranged in the supporting sleeve, the stroke rods are arranged at the end, away from the motor, of the supporting sleeve, in the horizontal direction, the situation that the size of the electric actuator is increased due to the fact that the distance between the two stroke rods is affected by the transmission assembly can be avoided, and the electric actuator is compact in overall structure; and the occupied space is small.

Description

Technical Field

[0001] The present application relates to the technical field of uranium enrichment process, and in particular to an electric actuator and a vacuum regulating valve. Background Art

[0002] In the uranium enrichment process system, a vacuum regulating valve is generally required to regulate the flow of the gas pipeline in the system. The electric vacuum regulating valve generally includes an electric actuator, which drives the valve movement in the vacuum regulating valve. The electric actuator generally includes a motor, a transmission mechanism and a support structure for supporting the motor, wherein the transmission mechanism is connected to the output shaft of the motor.

[0003] The electric actuator in the existing vacuum regulating valve generally installs the motor on a connecting flange, and two columns are symmetrically arranged on the connecting flange. The transmission mechanism is located on the side of the connecting flange facing away from the motor and between the two columns. For example, the integrated linear stroke electric actuator disclosed in the patent application text with application number 201820206249.1.

[0004] However, the electric actuator in the prior art is relatively large, which causes the vacuum regulating valve to be relatively large, so that the vacuum regulating valve needs to occupy a relatively large space in the uranium enrichment process system. In addition, the electric actuator in the prior art has poor regulation accuracy. Utility Model Content

[0005] The present application provides an electric actuator and a vacuum regulating valve to solve at least one technical problem in the prior art.

[0006] In order to solve the above problems, the present application provides an electric actuator, which includes:

[0007] A support sleeve having a first support end and a second support end;

[0008] A motor, disposed at the first supporting end;

[0009] A travel rod, disposed at the second supporting end; and

[0010] The transmission assembly includes a transmission nut and a sliding part. The transmission nut is rotatably arranged in the support sleeve and connected to the motor. The sliding part is slidably arranged along the stroke rod, and one end of the sliding part is threadedly matched with the transmission nut, and the other end is used to connect the valve stem.

[0011] In some embodiments, one end of the sliding portion cooperates with the transmission nut via a trapezoidal thread.

[0012] In some embodiments, the sliding part includes a screw rod and a slider, the screw rod is threadedly engaged with the transmission nut, the slider is slidably set on the travel rod, the screw rod is connected to one side of the slider, and the slider is provided with a mounting hole on the side facing away from the screw rod, and the mounting hole is used to connect the valve stem.

[0013] In some embodiments, a first bearing and a second bearing are disposed between the transmission nut and the support sleeve, the first bearing is located at an end of the transmission nut close to the motor, and the second bearing is located at an end of the transmission nut away from the motor.

[0014] In some embodiments, one of the first bearing and the second bearing is a tapered roller bearing, and the other of the first bearing and the second bearing is a thrust ball bearing.

[0015] In some embodiments, the electric actuator further comprises:

[0016] The displacement sensor is arranged on the sliding part and is used for sensing the displacement of the sliding part.

[0017] In some embodiments, the electric actuator further comprises:

[0018] A connecting plate is provided with a through hole, wherein the through hole is used to connect the valve stem with the sliding portion, and an end of the travel rod away from the support sleeve is connected to one side of the connecting plate;

[0019] The protective cover and the connecting disk form a protective space, and the motor, the supporting sleeve, the transmission assembly and the travel rod are all located in the protective space.

[0020] In some embodiments, the electric actuator further comprises:

[0021] The support frame is arranged in the protection cover, and the second support end abuts against the support frame.

[0022] In some embodiments, when the electric actuator includes a displacement sensor, the displacement sensor is disposed on the sliding portion;

[0023] The electric actuator also includes:

[0024] A signal adapter plate is disposed on the support frame, and the signal adapter plate is communicatively connected with the displacement sensor.

[0025] The present application also provides a vacuum regulating valve, the vacuum regulating valve comprising:

[0026] Any electric actuator as described above; and

[0027] The valve stem is connected to the sliding part of the electric actuator.

[0028] The beneficial effect of the implementation of the present application is that the electric actuator provided by the present application includes a motor, a support sleeve, a travel rod and a transmission assembly. By arranging the motor at the first support end of the support sleeve, the travel rod at the second support end of the support sleeve, and the transmission assembly rotatably arranged in the support sleeve, the influence of the transmission assembly on the distance between the two travel rods in the horizontal direction can be avoided to increase the volume of the electric actuator, so that the overall structure of the electric actuator is compact and the space occupied is small.

[0029] When one end of the sliding part is matched with the driving nut through the trapezoidal thread, the adjustment accuracy of the electric actuator can be improved due to the high processing accuracy of the trapezoidal thread.

[0030] Furthermore, by using a tapered roller bearing and a thrust ball bearing to rotate the transmission nut in the support sleeve, the tapered roller bearing and the thrust ball bearing cooperate with each other to reduce radial force, and are not prone to friction and noise, thereby reducing the working noise of the electric actuator. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0032] Figure 1 is a structural schematic diagram of an electric actuator provided in one embodiment of the present application;

[0033] Figure 2 It is a structural schematic diagram of an electric actuator provided with a protective cover provided in one embodiment of the present application;

[0034] Figure 3 It is a structural schematic diagram of the location of the displacement sensor in the electric actuator provided in one embodiment of the present application;

[0035] Figure 4 It is a structural schematic diagram of the setting position of the signal adapter plate in the electric actuator provided in one embodiment of the present application;

[0036] In the figure: 100, electric actuator; 10, support sleeve; 11, first support end; 12, second support end; 13, end cover; 20, motor; 30, travel rod; 40, transmission assembly; 41, transmission nut; 42, sliding part; 421, screw rod; 422, slider; 422a, mounting hole; 51, first bearing; 52, second bearing; 60, displacement sensor; 71, connecting plate; 711, through hole; 72, protective cover; 73, support frame; 74, support rod; 80, signal adapter plate; 200, valve stem. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0038] In the description of the present application, 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" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. 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 application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] See also Figure 1 and Figure 2 The present application provides an electric actuator 100, including a support sleeve, a motor 20, a travel rod 30 and a transmission assembly 40. Among them, the support sleeve 10 has a first support end 11 and a second support end 12. The motor 20 is arranged at the first support end 11 of the support sleeve 10. The travel rod 30 is arranged at the second support end 12 of the support sleeve 10. The transmission assembly 40 includes a transmission nut 41 and a sliding portion 42. The transmission nut 41 is rotatably arranged in the support sleeve 10 and is connected to the motor 20. The sliding portion 42 is slidably arranged along the travel rod 30, and one end of the sliding portion 42 is threadedly matched with the transmission nut 41, and the other end of the sliding portion 42 is used to connect the valve stem 200.

[0043] The electric actuator 100 provided in the present application can be applied to a vacuum regulating valve. After the motor 20 is started, the motor 20 drives the transmission nut 41 to rotate, and the transmission nut 41 drives the sliding part 42 to move along the stroke rod 30, thereby driving the valve stem 200 connected to the sliding part 42 to move, and then the opening of the valve in the vacuum regulating valve can be controlled by the moving stroke of the valve stem 200. By setting the motor 20 at the first support end 11 of the support sleeve 10, the stroke rod 30 at the second support end 12 of the support sleeve 10, and the transmission assembly 40 being rotatably set in the support sleeve 10, in this way, in the horizontal direction, the influence of the transmission assembly 40 on the distance between the two stroke rods 30 can be avoided to increase the volume of the electric actuator 100, so that the overall structure of the electric actuator 100 is compact and the space occupied is small.

[0044] The motor 20 drives the transmission nut 41 to rotate, and utilizes the threaded fit between the transmission nut 41 and the sliding part 42 to drive the sliding part 42 to move along the travel rod 30. A motor 20 with a smaller torque can be selected, and the motor 20 is smaller in size, further reducing the overall volume of the electric actuator 100.

[0045] The support sleeve 10 may be a sleeve structure, and the first support end 11 and the second support end 12 of the support sleeve 10 may be opposite ends of the sleeve structure. The first support end 11 of the support sleeve 10 may be supported on the end face of the motor 20 provided with one end of the output shaft. After the end face of the motor 20 abuts against the end face of the first support end 11, the output shaft of the motor 20 extends into the support sleeve 10 and is connected with the transmission nut 41 in the support sleeve 10. In the embodiment of the present application, there is no restriction on the specific connection method for the fixed connection between the output shaft of the motor 20 and the transmission nut 41. For example, the output shaft of the motor 20 and the transmission nut 41 may be keyed or pinned. It can be understood that the end of the transmission nut 41 connected to the motor 20 is provided with a matching hole that matches the output shaft, and the end of the transmission nut 41 facing away from the motor 20 is provided with a threaded hole that matches the sliding portion 42, and the threaded hole and the matching hole may be connected.

[0046] The travel rod 30 is arranged at the second support end 12 of the support sleeve 10. One end of the travel rod 30 can be fixedly connected to the end surface of the second support end 12. The fixed connection method between the travel rod 30 and the second support end 12 can be a threaded connection or an interference fit, but is not limited thereto. In order to ensure the stability of the sliding portion 42 sliding along the travel rod 30, in some embodiments, at least two travel rods 30 can be provided, and the two travel rods 30 are symmetrically distributed at the second support end 12 of the support sleeve 10. It should be noted that when multiple travel rods 30 are provided, the multiple travel rods 30 can be evenly distributed or symmetrically distributed along the circumference of the second support end 12. In some embodiments, scale lines can be provided on the travel rod 30, and the user can judge the valve opening of the vacuum valve according to the scale line position corresponding to the sliding portion 42 on the travel rod 30.

[0047] The transmission assembly 40 connects the output shaft of the motor 20 and the valve stem 200, and is used to drive the valve stem 200 to move under the driving action of the motor 20. The motor 20 drives the transmission nut 41 to rotate, and the transmission nut 41 drives the sliding part 42 to move along the central axis direction of the transmission nut 41 through the threaded engagement with the sliding part 42. In some embodiments, one end of the sliding part 42 can be engaged with the transmission nut 41 through a trapezoidal thread. The processing precision of the trapezoidal thread is high. By engaging the transmission nut 41 with the sliding part 42 through the trapezoidal thread, the adjustment precision of the electric actuator 100 on the valve stem 200 can be improved.

[0048] The transmission nut 41 in the transmission assembly 40 is rotatably disposed in the support sleeve 10. It can be understood that the transmission nut 41 can be rotatably disposed in the support sleeve 10 through a bearing. In some embodiments, a first bearing 51 and a second bearing 52 can be disposed between the transmission nut 41 and the support sleeve 10. The first bearing 51 is located at one end of the transmission nut 41 close to the motor 20, and the second bearing 52 is located at one end of the transmission nut 41 away from the motor 20. The stability of the rotation of the transmission nut 41 is improved by respectively arranging a bearing at both ends of the transmission nut 41.

[0049] In some embodiments, one of the first bearing 51 and the second bearing 52 may be a tapered roller bearing, and the other may be a thrust ball bearing. For example, the tapered roller bearing may be arranged at the end of the transmission nut 41 away from the motor 20, and the thrust ball bearing may be arranged at the end of the transmission nut 41 close to the motor 20. To achieve the installation of the tapered roller bearing and the thrust ball bearing, the support sleeve 10 may be provided with an end cover 13 at the end close to the motor 20, and the inner wall at the end away from the motor 20 may have a stepped protrusion, so that the retaining member on one side of the thrust ball bearing abuts against the shaft shoulder structure of the transmission nut 41, and the retaining member on the other side abuts against the end cover 13; the inner ring of the tapered roller bearing abuts against the stepped protrusion of the support sleeve 10, and the outer ring abuts against the shaft shoulder structure of the transmission nut 41.

[0050] The transmission nut 41 is rotatably arranged in the support sleeve 10 through a tapered roller bearing and a thrust ball bearing. The tapered roller bearing and the thrust ball bearing cooperate with each other to reduce the radial force of the transmission nut 41, making it less likely for the transmission nut 41 to cause friction and generate noise, thereby reducing the working noise of the electric actuator 100.

[0051] One end of the sliding part 42 in the transmission assembly 40 is threadedly matched with the transmission nut 41, and the other end is used to connect the valve stem 200. In some embodiments, the sliding part 42 includes a screw rod 421 and a slider 422. The screw rod 421 is threadedly matched with the transmission nut 41. The slider 422 is slidably arranged on the travel rod 30. For example, the slider 422 may be provided with a sliding hole or a sliding groove that matches the travel rod 30, so that the slider 422 can slide along the travel rod 30. Of course, in some embodiments, an oil-free copper sleeve may be further provided in the sliding hole of the slider 422, and the travel rod 30 passes through the oil-free copper sleeve to reduce the friction between the travel rod 30 and the slider 422. The screw rod 421 may be connected to one side of the slider 422. The embodiment of the present application does not limit the connection method between the screw rod 421 and the slider 422. For example, it may be a threaded connection, an interference fit connection, or the screw rod 421 and the slider 422 may be integrally processed and formed. A mounting hole 422a may be provided on the side of the slider 422 facing away from the screw rod 421, and the mounting hole 422a is used to connect the valve stem 200. The specific structure of the mounting hole 422a may be provided according to the specific matching mode between the valve stem 200 and the slider 422, for example, the valve stem 200 and the slider 422 are threadedly matched, and the mounting hole 422a may be a threaded hole.

[0052] like Figure 3 and Figure 4 As shown, in some embodiments, the electric actuator 100 may further include a displacement sensor 60. The displacement sensor 60 is disposed on the sliding portion 42 to sense the displacement of the sliding portion 42. When the electric actuator 100 is applied to a vacuum regulating valve, the sliding portion 42 is connected to the valve core through the valve stem 200. The displacement of the sliding portion 42 can directly reflect the displacement of the valve core. By providing the displacement sensor 60 to sense the displacement of the sliding portion 42, it is convenient for the user to obtain the displacement of the valve core according to the displacement of the sliding portion 42. The embodiment of the present application does not limit the specific type of the displacement sensor 60, and the displacement can be detected by means of resistance, capacitance, inductance or optics. For example, the displacement sensor 60 includes a receiver and a reflector. The reflector can be fixedly disposed on the slider 422 of the sliding portion 42, and the receiver can be fixedly disposed on the support sleeve 10 or the stroke rod 30, but is not limited thereto.

[0053] like Figure 2As shown, in some embodiments, the electric actuator 100 further includes a connecting disk 71 and a protective cover 72. The connecting disk 71 is provided with a through hole 711, and the through hole 711 is used to connect the valve stem 200 to the sliding portion 42. One end of the travel rod 30 away from the support sleeve 10 is connected to one side of the connecting disk 71. It can be understood that after the travel rod 30 is connected to the connecting disk 71, the mounting hole 422a on the slider 422 corresponds to the through hole 711 on the connecting disk 71. The protective cover 72 and the connecting disk 71 enclose a protective space, and the motor 20, the support sleeve 10, the transmission assembly 40 and the travel rod 30 are all located in the protective space. The protective cover 72 can be a rectangular or cylindrical tube-shaped structure, and the open end of the protective cover 72 can be connected to the connecting disk 71 in a detachable manner such as snap-on, threaded connection, or threaded fastener connection. The electric actuator 100 can prevent dust, oil and other impurities from entering by providing the protective cover 72, thereby ensuring the normal operation of the internal motor 20 and the transmission assembly 40 and other components, and extending the service life of the electric actuator 100. Of course, in some implementations, a visual window can also be provided on the protective cover 72, and the visual window corresponds to the position of the scale line on the travel rod 30, so that the user can observe the scale line on the travel rod 30. The visual window can be provided with an acrylic plate or glass, but is not limited thereto.

[0054] like Figures 2 to 4 As shown, in some embodiments, the electric actuator 100 may further include a support rod 74, which is disposed in the protective cover 72. At least two support rods 74 may be provided, symmetrically distributed in the protective cover 72, and supported between the top of the protective cover 72 and the connecting plate 71. The support rod 74 and the top of the protective cover 72 and the support rod 74 and the connecting plate 71 may be connected by threaded fasteners, but are not limited thereto.

[0055] like Figures 2 to 4 As shown, in some embodiments, the electric actuator 100 further includes a support frame 73. The support frame 73 is disposed in the protective cover 72, and the second support end 12 of the support sleeve 10 abuts against the support frame 73, so that the support frame 73 can support the support sleeve 10 and the motor 20 on the support sleeve 10 to ensure the stability of the installation of the motor 20. In some embodiments, the support frame 73 can be a U-shaped structure, and the support sleeve 10 and the motor 20 are located in the U-shaped groove formed by the U-shaped structure, and the second support end 12 of the support sleeve 10 abuts against the bottom of the U-shaped groove structure. It can be understood that the bottom of the U-shaped groove structure is provided with an opening for the screw rod 421 of the sliding part 42 to pass through and cooperate with the transmission nut 41 in the support sleeve 10. The support frame 73 in the protective cover 72 can be fixedly disposed on the inner wall of the protective cover 72, or fixed on the support rod 74 in the protective cover 72.

[0056] like Figure 4As shown, in some embodiments, when the electric actuator 100 includes a displacement sensor 60, and the displacement sensor 60 is disposed on the sliding portion 42, the electric actuator 100 further includes a signal adapter board 80. The signal adapter board 80 can be disposed on the support frame 73, and the signal adapter board 80 is communicatively connected with the displacement sensor 60, so that the sensing information of the displacement sensor 60 can be transmitted to the remote control mainboard through the signal adapter board 80. By providing the signal adapter board 80, remote control between the displacement sensor 60 and the control mainboard is realized.

[0057] In some embodiments, the present application further provides a vacuum regulating valve. The vacuum regulating valve includes the electric actuator 100 and the valve stem 200 in any of the above-mentioned electric actuator 100 embodiments. The valve stem 200 is connected to the sliding portion 42 of the electric actuator 100. It can be understood that the vacuum regulating valve can also include a valve body and a valve core assembly.

[0058] The vacuum regulating valve provided in the present application adopts all the technical solutions of all the embodiments of the above-mentioned electric actuator 100, and therefore has at least all the beneficial effects brought by the technical solutions of the embodiments of the above-mentioned electric actuator 100, which will not be described one by one here.

[0059] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electric actuator, characterized in that: The electric actuator comprises: A support sleeve having a first support end and a second support end; A motor, disposed at the first supporting end; A travel rod, disposed at the second supporting end; and The transmission assembly includes a transmission nut and a sliding part. The transmission nut is rotatably arranged in the support sleeve and connected to the motor. The sliding part is slidably arranged along the stroke rod, and one end of the sliding part is threadedly matched with the transmission nut, and the other end is used to connect the valve stem.

2. The electric actuator according to claim 1, characterized in that: One end of the sliding part is matched with the driving nut through a trapezoidal thread.

3. The electric actuator according to claim 1, characterized in that: The sliding part includes a screw rod and a slider, the screw rod is threadedly matched with the transmission nut, the slider is slidably set on the travel rod, the screw rod is connected to one side of the slider, and the side of the slider facing away from the screw rod is provided with a mounting hole, and the mounting hole is used to connect the valve stem.

4. The electric actuator according to claim 1, characterized in that: A first bearing and a second bearing are arranged between the transmission nut and the support sleeve. The first bearing is located at an end of the transmission nut close to the motor, and the second bearing is located at an end of the transmission nut away from the motor.

5. The electric actuator according to claim 4, characterized in that: One of the first bearing and the second bearing is a tapered roller bearing, and the other one is a thrust ball bearing.

6. The electric actuator according to claim 1, characterized in that: The electric actuator also includes: The displacement sensor is arranged on the sliding part and is used for sensing the displacement of the sliding part.

7. The electric actuator according to any one of claims 1 to 6, characterized in that: The electric actuator also includes: A connecting plate is provided with a through hole, wherein the through hole is used to connect the valve stem with the sliding portion, and an end of the travel rod away from the support sleeve is connected to one side of the connecting plate; The protective cover and the connecting disk form a protective space, and the motor, the supporting sleeve, the transmission assembly and the travel rod are all located in the protective space.

8. The electric actuator according to claim 7, characterized in that: The electric actuator also includes: The support frame is arranged in the protection cover, and the second support end abuts against the support frame.

9. The electric actuator according to claim 8, characterized in that: When the electric actuator includes a displacement sensor, the displacement sensor is arranged on the sliding part; The electric actuator also includes: A signal adapter plate is disposed on the support frame, and the signal adapter plate is communicatively connected with the displacement sensor.

10. A vacuum regulating valve, characterized in that: The vacuum regulating valve comprises: The electric actuator according to any one of claims 1 to 9; and The valve stem is connected to the sliding part of the electric actuator.

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