A control method for a manual and electric integrated switch vacuum valve

Abstract

The present invention discloses a control method for a manual and electric integrated switch vacuum valve. The vacuum valve comprises a housing, and a fluid on-off assembly and a precision transmission assembly installed in the inner cavity of the housing; the precision transmission assembly comprises an electric driver, a transmission gear set and a drive rod set; the transmission gear set is driven by the electric driver to rotate horizontally; the drive rod set cooperates with the transmission gear set to move up and down; the lower end of the drive rod set is connected to the fluid on-off assembly to control the electric opening or closing of the fluid on-off assembly; the upper end of the drive rod set extends out of the housing to manually control the opening or closing of the fluid on-off assembly. Integrating the manual switch and the electric switch functions can not only improve the reliability of the product, but also meet the on-site switch requirements and remote switch requirements of the vacuum valve.

Description

Technical Field

[0001] The invention relates to the technical field of electromechanical product design, and in particular to a control method for a manual and electric integrated switch vacuum valve. Background Art

[0002] Vacuum valves are key components used to control the flow of fluids in vacuum systems. They are usually divided into manual switch type, electric switch type, pneumatic switch type, and electromagnetic switch type. Among them, electric switch type and pneumatic switch type are large in size and high in cost, and are suitable for vacuum valves with flange diameters above DN100. In addition to manual switch valves, vacuum valves with flange diameters of DN3 to DN40 usually use electromagnetic switch type, and vacuum valves with flange diameters of DN40 to DN100 often use pneumatic or electric switch type.

[0003] At present, for vacuum valves of DN25, there are only two types of products for users to choose from: solenoid valves and manual valves. However, the reliability, life span and corrosion resistance of vacuum solenoid valves are far inferior to those of manual switch type and electric switch type valves. Therefore, it is necessary to develop a DN25 flange vacuum valve with electric switch function. At the same time, it is difficult to make an electric switch valve due to size limitations.

[0004] However, with the increasing requirements for vacuum valve reliability and environmental adaptability in certain special vacuum fields, simple electric valves or manual valves can no longer meet user needs. The demand for vacuum valves that integrate manual and electric switches will continue to increase. Summary of the invention

[0005] The purpose of the present invention is to provide a control method for a manual and electric integrated switch vacuum valve in view of the technical defect that the existing simple electric valve or manual valve can no longer meet the requirements of special vacuum fields.

[0006] The technical solution adopted to achieve the purpose of the present invention is:

[0007] A control method for a manual and electric integrated switch vacuum valve, characterized in that the manual and electric integrated switch vacuum valve comprises a housing, and a precision transmission component and a fluid on-off component installed in an inner cavity of the housing;

[0008] The precision transmission assembly includes an electric drive, a transmission gear set and a drive rod set; the transmission gear set is driven by the electric drive to rotate horizontally; the transmission gear set drives the drive rod set to move up and down; the lower end of the drive rod set is connected to the fluid on-off assembly to control the electric opening or closing of the fluid on-off assembly;

[0009] The upper end of the driving rod group extends out of the housing to manually control the opening or closing of the fluid on-off assembly;

[0010] The fluid on-off assembly comprises a valve stem connected to the lower end of the driving rod assembly, a valve flap installed at the lower end of the valve stem, a valve body and a valve seat installed on the valve body; when the valve stem moves downward to the closing position, the valve flap and the valve seat cooperate to close the passage in the valve body; when the valve stem moves upward, the valve flap and the valve seat separate to open the passage in the valve body;

[0011] The control method of the manual and electric integrated switch vacuum valve is as follows: the manual control method is to pull the manual rotary rod, drive the valve stem to move up or down through the driving rod group, and realize the opening or closing of the vacuum valve;

[0012] The electric control method is that the electric drive member drives the transmission gear set to rotate horizontally, the driving rod set cooperates with the transmission gear set to move up and down, and the lower end of the driving rod set controls the electric opening or closing of the fluid on-off assembly.

[0013] In the above technical solution, the electric drive component includes a DC motor and a planetary reducer.

[0014] In the above technical solution, the transmission gear set includes a first gear mounted on the output shaft of the planetary reducer and a second gear meshing with the first gear.

[0015] In the above technical solution, the driving rod group includes a rotating rod, a lead screw and a lead screw nut;

[0016] The lower end of the rotating rod is connected to the upper end of the lead screw by a sliding coupling;

[0017] The upper end of the rotating rod passes through the housing and is equipped with a manual rotating rod;

[0018] The lead screw is sheathed with a lead screw nut; the lead screw nut is fixedly installed inside the housing through a bracket; the rotating rod drives the lead screw to rotate, and the lead screw and the lead screw nut cooperate to produce displacement in the up and down directions.

[0019] In the above technical solution, a one-way bearing is installed at the center of the second gear, and a support bearing is installed on the inner wall of the shell; the rotating rod passes through the one-way bearing and the support bearing to ensure the rotation stability of the rotating rod.

[0020] In the above technical solution, the top fixed sleeve of the valve stem is provided with a metal vacuum bellows;

[0021] The top end of the metal vacuum bellows is rotatably connected to the lower end of the lead screw, and the bottom end of the metal vacuum bellows is fixedly mounted on the valve body.

[0022] In the above technical solution, a signal sensing control component is also included;

[0023] The signal sensing control component includes a torque sensor and a position sensor.

[0024] In the above technical solution, the active disk of the torque sensor is fixedly mounted on the second gear; the center of the driven disk of the torque sensor is fixedly connected to the rotating rod;

[0025] The position sensor includes an open position sensor and a closed position sensor; a valve stem position contact is horizontally installed on the lead screw; when the lead screw descends to the closed position, the valve stem position contact contacts with the closed position sensor; when the lead screw ascends to the open position, the valve stem position contact contacts with the open position sensor.

[0026] In the above technical solution, the signal sensing control component also includes an overload protection sensor. When the torque of the torque sensor reaches a limited torque, the driven disk jumps upward and disengages from the active disk, and the driven disk triggers the overload protection sensor.

[0027] In the above technical solution, an electrical socket and a transparent observation window are provided on the housing.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The manual and electric integrated switch vacuum valve provided by the present invention integrates the manual switch and electric switch functions into one, which can not only improve the reliability of the product (when the manual switch function or the electric switch function fails, the other switch function can still be used), but also meet the on-site switch requirements and remote switch requirements of the vacuum valve.

[0030] 2. The manual and electric integrated switch vacuum valve provided by the present invention uses two types of sensors, namely position sensor and torque sensor, which greatly improves the reliability of the product and avoids the product being unusable due to failure or malfunction of a single type of sensor.

[0031] 3. The manual and electric integrated switch vacuum valve provided by the present invention has compact components, high integration, small product size and light weight.

[0032] 4. The manual and electric integrated switch vacuum valve provided by the present invention adopts a hardware combination method. The switch state of the vacuum valve can be detected by a remote control system. The movement direction of the valve stem can also be identified through a transparent observation window when the vacuum valve is powered off or manually operated on site, thereby ensuring the correctness of the valve operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is the principle block diagram of the manual and electric integrated switch vacuum valve;

[0034] Figure 2 It is a structural schematic diagram of a manual and electric integrated switch vacuum valve.

[0035] In the figure: 1-precision transmission component, 2-signal sensor control component, 3-fluid on-off component, 4-housing, 5-DC motor, 6-planetary reducer, 7-1-first gear, 7-2-second gear, 8-manual rotary rod, 9-one-way bearing, 10-support bearing, 11-sliding coupling, 12-1-rotating rod, 12-2-screw, 13-torque sensor, 14-overload protection sensor, 15-open position sensor, 16-valve stem position contact, 17-closed position sensor, 18-metal vacuum bellows, 19-valve stem, 20-valve disc, 21-valve seat, 22-valve body, 23-electrical socket, 24-transparent observation window, 25-screw nut, 26-bracket. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] Example 1

[0038] A manual and electric integrated switch vacuum valve, such as Figure 1 and Figure 2 As shown, it includes a shell 4 and a precision transmission component 1, a signal sensing control component 2 and a fluid on-off component 3 arranged inside the shell 4; the fluid on-off component 3 controls the opening or closing of the valve; the precision transmission component 1 is responsible for outputting switching power to the fluid on-off component 3 to drive it to open or close; the signal sensing control component 2 is responsible for collecting the position signal and torque signal of the precision transmission component 3; the shell 4 is responsible for integrating and fixing the precision transmission component 1, the signal sensing control component 2 and the fluid on-off component 3.

[0039] The precision transmission assembly includes an electric drive, a transmission gear set and a drive rod set; the transmission gear set is driven by the electric drive to rotate horizontally; the drive rod set cooperates with the transmission gear set to move up and down; the lower end of the drive rod set is connected to the fluid on-off assembly to control the electric opening or closing of the fluid on-off assembly;

[0040] The upper end of the driving rod group extends out of the housing 4 to manually control the opening or closing of the fluid on-off assembly.

[0041] Example 2

[0042] This embodiment introduces the detailed structure based on the embodiment 1.

[0043] The electric drive unit includes a DC motor 5 and a planetary reducer 6. Compared with an AC motor, a DC motor is smaller in size and higher in precision. The transmission gear set includes a first gear 7-1 mounted on the output shaft of the planetary reducer 6 and a second gear 7-2 meshing with the first gear 7-1. The drive rod set includes a rotating rod 12-1 and a lead screw 12-2; the lower end of the rotating rod 12-1 is connected to the upper end of the lead screw 12-2 through a sliding coupling 11. The upper end of the rotating rod 12-1 passes through the housing and is equipped with a manual rotating rod 8.

[0044] A torque sensor 13 is coaxially fixedly mounted on the second gear 7-2; the driven plate 13-2 of the torque sensor 13 is fixedly connected to the rotating rod 12-1, so that the second gear 7-2 drives the rotating rod 12-1 to rotate; a one-way bearing 9 is installed at the center of the second gear 7-2, and a support bearing 10 is installed on the inner wall of the housing 4; the rotating rod 12-1 passes through the one-way bearing 9 and the support bearing 10 to ensure the rotation stability of the rotating rod 12-1. The lead screw 12-2 is sheathed with a lead screw nut 25; the lead screw nut 25 is fixedly mounted inside the housing 4 through a bracket 26. The rotating rod 12-1 drives the lead screw 12-2 to rotate, and at the same time, the lead screw 12-2 cooperates with the lead screw nut 25 to produce displacement in the up and down directions, thereby driving the fluid on-off assembly to open or close.

[0045] The fluid on-off assembly 3 includes a valve stem 19, a valve flap 20 installed at the lower end of the valve stem 19, a valve body 22, and a valve seat 21 installed on the valve body 22; when the valve stem 19 moves downward to the closing position, the valve flap 20 and the valve seat 21 cooperate to close the passage in the valve body 22; when the valve stem 19 moves upward, the valve flap 20 and the valve seat 21 separate to open the passage in the valve body 22. A metal vacuum bellows 18 is fixedly sleeved at the top end of the valve stem 19. The metal vacuum bellows 18 seals the valve stem 19 to prevent the gas in the valve body 22 from entering the internal cavity of the housing 4.

[0046] The lower end of the lead screw 12-2 is rotatably connected to the top end of the metal vacuum bellows 18, and the bottom end of the metal vacuum bellows 18 is fixedly mounted on the valve body 22. When the lead screw 12-2 moves up and down, the top end of the metal vacuum bellows 18 is driven to move up and down, and then the valve stem 19 is driven to move up and down to realize the opening or closing of the vacuum valve.

[0047] The housing 4 is provided with an electrical socket 23 and a transparent observation window 24. The electrical socket 23 is installed at a corresponding position of the DC motor 5; the transparent observation window 24 is provided at a corresponding position of the valve stem position contact 16, so as to observe the movement direction of the valve stem 19 and ensure the correctness of the action of the vacuum valve.

[0048] Example 3

[0049] This embodiment is based on Embodiment 1 and Embodiment 2 and introduces the signal sensing control component.

[0050] The signal sensing control component 2 includes a torque sensor 13 installed on the second gear 7-2, an overload protection sensor 14 installed above the second gear 7-2, a valve stem position contact 16 installed horizontally on the lead screw 12-2, and an open position sensor 15 and a closed position sensor 17 installed above and below the valve stem position contact 16, respectively.

[0051] The active disk 13-1 of the torque sensor 13 is fixedly mounted on the second gear 7-2; the center of the driven disk 13-2 of the torque sensor 13 is fixedly connected to the rotating rod 12-1; when the torque of the torque sensor 13 is less than the limited torque, the driven disk 13-2 rotates together with the active disk 13-1; when the torque of the torque sensor 13 reaches the limited torque, the driven disk 13-2 jumps upward and disengages from the active disk 13-1, the driven disk 13-2 stops rotating, and the overload protection sensor 14 is triggered at the same time; the overload protection sensor 14 is electrically connected to the DC motor 5, and when the overload protection sensor 14 is triggered, the DC motor 5 is powered off.

[0052] When the lead screw 12-2 moves up and down, the valve stem position contact 16 moves up and down accordingly. When the lead screw 12-2 moves downward to the closed position, the valve stem position contact 16 contacts the closed position sensor 17; when the lead screw 12-2 moves upward to the open position, the valve stem position contact 16 contacts the open position sensor 15.

[0053] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0054] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0055] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A control method for a manual and electric integrated switch vacuum valve, characterized in that: The manual and electric integrated switch vacuum valve comprises a housing, and a precision transmission component and a fluid on-off component installed in the inner cavity of the housing; The precision transmission assembly includes an electric drive, a transmission gear set and a drive rod set; the transmission gear set is driven by the electric drive to rotate horizontally; the transmission gear set drives the drive rod set to move up and down; the lower end of the drive rod set is connected to the fluid on-off assembly to control the electric opening or closing of the fluid on-off assembly; The upper end of the driving rod group extends out of the housing to manually control the opening or closing of the fluid on-off assembly; The fluid on-off assembly comprises a valve stem connected to the lower end of the driving rod assembly, a valve flap installed at the lower end of the valve stem, a valve body and a valve seat installed on the valve body; when the valve stem moves downward to the closing position, the valve flap and the valve seat cooperate to close the passage in the valve body; when the valve stem moves upward, the valve flap and the valve seat separate to open the passage in the valve body; The manual control method of the manual and electric integrated switch vacuum valve is to pull the manual rotary rod to drive the valve stem to move up or down through the driving rod group to realize the opening or closing of the vacuum valve; The electric control method of the manual and electric integrated switch vacuum valve is that the electric drive member drives the transmission gear group to rotate horizontally, the driving rod group cooperates with the transmission gear group to move up and down, and the lower end of the driving rod group controls the electric opening or closing of the fluid on-off component; Also includes a signal sensing control component; the signal sensing control component includes a torque sensor and a position sensor; The electric drive unit includes a DC motor and a planetary reducer; The transmission gear set includes a first gear mounted on the output shaft of the planetary reducer and a second gear meshing with the first gear; The driving rod assembly comprises a rotating rod, a lead screw and a lead screw nut; The lower end of the rotating rod is connected to the upper end of the lead screw by a sliding coupling; The upper end of the rotating rod passes through the housing and is equipped with a manual rotating rod; The lead screw is sheathed with a lead screw nut; the lead screw nut is fixedly mounted inside the housing through a bracket; the rotating rod drives the lead screw to rotate, and the lead screw and the lead screw nut cooperate to produce a displacement in an up-and-down direction; The active disk of the torque sensor is fixedly mounted on the second gear; the center of the driven disk of the torque sensor is fixedly connected to the rotating rod; The position sensor includes an open position sensor and a closed position sensor; a valve stem position contact is horizontally mounted on the lead screw; when the lead screw descends to the closed position, the valve stem position contact contacts the closed position sensor; when the lead screw ascends to the open position, the valve stem position contact contacts the open position sensor; The signal sensing control component also includes an overload protection sensor. When the torque of the torque sensor reaches a limited torque, the driven disk jumps upward and disengages from the active disk, and the driven disk triggers the overload protection sensor.

2. The control method according to claim 1, characterized in that: A one-way bearing is installed at the center of the second gear, and a supporting bearing is installed on the inner wall of the shell; the rotating rod passes through the one-way bearing and the supporting bearing to ensure the rotation stability of the rotating rod.

3. The control method according to claim 1, characterized in that: The top fixed sleeve of the valve stem is provided with a metal vacuum bellows; The top end of the metal vacuum bellows is rotatably connected to the lower end of the lead screw, and the bottom end of the metal vacuum bellows is fixedly mounted on the valve body.

4. The control method according to claim 1, characterized in that: The shell is provided with an electrical socket and a transparent observation window.

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