CN114439995B

CN114439995B - Valve booster

Info

Publication number: CN114439995B
Application number: CN202210092247.5A
Authority: CN
Inventors: 梁的; 高文霄; 李健; 黄远程; 孙鹏远; 高勇
Original assignee: China Nuclear Industry Maintenance Co Ltd
Current assignee: China Nuclear Industry Maintenance Co Ltd
Priority date: 2022-01-26
Filing date: 2022-01-26
Publication date: 2023-05-26
Anticipated expiration: 2042-01-26
Also published as: CN114439995A

Abstract

The application provides a valve booster device, including casing, drive assembly and torque output piece. The shell is held by a user. The driving assembly is arranged in the inner cavity of the shell and comprises a motor and a driving shaft in transmission connection with an output shaft of the motor. The torque output piece is in transmission connection with the driving shaft, and is provided with a connecting part for connecting a valve rod of a valve to be opened and closed, so that the valve rod is driven to rotate through the connecting part to open and close the valve. According to the valve booster device, the motor is used as a power source to replace manual torque output to the valve rod, so that the labor intensity of operators is reduced, and the working efficiency is improved; the working efficiency is improved, so that the stay time of operators on site is obviously reduced, the contact time of dangerous goods is further shortened, and the health and safety of the operators are ensured.

Description

Valve booster

Technical Field

The application relates to the technical field of valves, in particular to a valve booster device.

Background

In the field of maintenance of chemical equipment, power plant equipment and the like, the number of valve equipment is numerous, and the valve maintenance workload is large. Wherein like the large-scale manual valve of some butterfly valves, blast gate and manual gate valve etc. types in the important liquid conveying system, single switch need rotate the hand wheel hundred circles of valve more than, for a period of time up to tens minutes, and need switch valve many times in maintenance, test process, it is not only laborious to consuming time to still have great potential safety hazard, the concrete expression is: the valve is rotated for a long time, the attention of operators is completely focused on the action of operating the valve, and dangerous unexpected conditions of the field environment are easily ignored; operating the valve for a long time can cause operators to contact excessive dangerous articles, especially radiation in buildings such as nuclear islands; in addition, the risk of hand bruising of the person is increased.

In summary, the existing large-scale manual valve completely relies on manpower to drive a hand wheel to finish valve operation in the test and maintenance processes, and has the defects of low working efficiency, high labor intensity, potential safety hazard and the like.

Disclosure of Invention

The application provides a valve booster unit through setting up drive assembly and torque output spare, can assist the operating personnel to carry out rotary switch to manual valve to the work efficiency who has among the prior art when the manual valve is operated is low, intensity of labour is big, there is the technical problem of potential safety hazard.

The application provides a valve booster, including casing, drive assembly and torque output piece.

The shell is held by a user.

The driving assembly is arranged in the inner cavity of the shell and comprises a motor and a driving shaft in transmission connection with an output shaft of the motor.

The torque output piece is in transmission connection with the driving shaft, and is provided with a connecting part for connecting a valve rod of a valve to be opened and closed, so that the valve rod is driven to rotate through the connecting part to open and close the valve.

The valve booster in this application need demolish the hand wheel of valve before the operation, after directly or indirectly being connected connecting portion and valve rod, the starter motor drives and drives pivot, torque output piece, connecting portion rotation, drives the valve rod rotation by connecting portion again to replaced the rotatory operation of manual drive hand wheel and valve rod. According to the valve booster provided by the embodiment of the application, the motor is used as a power source to replace manual torque output to the valve rod, so that the labor intensity of operators is reduced, and the working efficiency is improved; the working efficiency is improved, so that the residence time of operators on site is obviously reduced, the contact time of dangerous goods is further reduced, and the health and safety of the operators are ensured; and when the valve is opened and closed, the hands of the operator are not in direct contact with the valve, so that the risk that the hands are squeezed by the valve is reduced, meanwhile, the attention can be transferred to the field environment, the safety during operation is further improved, and the safety is more sensitive to dangerous conditions of the field environment.

In one possible design, the drive assembly further includes a gear shifting mechanism drivingly connected between the motor and the drive shaft, the torque of the drive shaft and the torque output member being variable by shifting the gear shifting mechanism.

In one possible design manner, an output shaft of the motor and the driving shaft are respectively sleeved with a main rotation gear set and a secondary rotation gear, wherein the main rotation gear set comprises a large main rotation gear, a middle main rotation gear and a small main rotation gear which are used for matching the rotation number of the gears;

the speed change mechanism comprises an output gear meshed with the secondary rotating gear, and a large transmission gear, a middle transmission gear and a small transmission gear which are used for matching the number of gear revolutions, wherein the output gear, the large transmission gear, the middle transmission gear and the small transmission gear are all sleeved and fixed on a movable shaft, and two ends of the movable shaft extend to the outside of the shell for a user to push;

the pushed movable shaft can axially move and drive the large transmission gear, the middle transmission gear and the small transmission gear to move so as to mesh with the corresponding small main rotation gear, the middle main rotation gear and the large main rotation gear, thereby realizing the change of the torque of the driving shaft and the torque output piece by carrying out the change operation on the speed change mechanism.

In one possible design manner, the inner cavity of the shell is provided with a first shaft mounting seat and a second shaft mounting seat which are oppositely arranged, the output shaft and the movable shaft are rotationally connected between the first shaft mounting seat and the second shaft mounting seat, the movable shaft can axially move on the first shaft mounting seat and the second shaft mounting seat, and the outer side of the second shaft mounting seat is rotationally connected with the driving shaft.

In one possible embodiment, the valve assistance device further comprises:

and the overload protection mechanism is used for connecting or separating the driving rotating shaft and the torque output piece so as to disconnect the transmission of the driving rotating shaft and the torque output piece when the valve rod rotates in place.

In one possible design, the overload protection mechanism includes an elastic member and a guide groove, a portion of the driving shaft close to the torque output member is slidably disposed in the guide groove, the driving shaft may swing in the guide groove to connect or separate the driving shaft and the torque output member, and the elastic member is connected between the housing and the driving shaft, so as to provide a restoring force for the driving shaft during swinging.

In one possible embodiment, the drive shaft and the rotational axis of the torque output element are perpendicular to one another.

In one possible embodiment, the drive shaft and the torque output element are each provided with a bevel gear one and a bevel gear two which are engaged in each case.

In one possible design, the ratio of the length of the driving shaft to the overall length of the valve booster is 4-6: 10.

in one possible embodiment, the motor is a pneumatic motor or a hydraulic motor.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of an example of a valve assist apparatus provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of another view of FIG. 1;

FIG. 3 is a schematic diagram of an example of a transmission mechanism provided in an embodiment of the present application;

FIG. 4 is a schematic view of FIG. 3 in another state;

FIG. 5 is a schematic view of FIG. 3 in yet another state;

FIG. 6 is a schematic diagram of an example of an overload protection mechanism provided in an embodiment of the present application;

fig. 7 is a schematic view of fig. 6 in another state.

Reference numerals: 10. a housing; 11. a first shaft mounting seat; 12. a second shaft mounting seat; 20. a drive assembly; 21. a motor; 211. an output shaft; 212. a main rotation gear set; 212a, large main rotation gear; 212b, a main gear; 212c, small main rotating gear; 22. a driving shaft; 221. a secondary rotation gear; 222. bevel gears I; 23. a speed change mechanism; 231. an output gear; 232. a large transmission gear; 233. a middle transmission gear; 234. a pinion gear; 235. a movable shaft; 30. a torque output member; 31. a connection part; 32. bevel gears II; 41. an elastic member; 42. a guide groove.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise. In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present application, it should be understood that the terms "inner," "outer," "upper," "bottom," "front," "rear," and the like indicate an orientation or a positional relationship (if any) based on that shown in fig. 1, merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application.

It should be further noted that, in the embodiments of the present application, the same reference numerals denote the same components or the same parts, and for the same parts in the embodiments of the present application, reference numerals may be given to only one of the parts or the parts in the drawings by way of example, and it should be understood that, for other same parts or parts, the reference numerals are equally applicable.

For example, in the nuclear power maintenance industry, for example, a part of butterfly valve (not less than DN 1000), EBA (containment ventilation system) air valve, manual gate valve (not less than DN 500) and other large manual valves in an important factory water system need to rotate a hand wheel for more than 600 circles for about 20 minutes in a single switch. At present, the valves are completely finished by manually driving the hand wheels in the test and maintenance processes, double matching is needed, the operation process is time-consuming and labor-consuming, and the hand injuries of personnel are easy to cause. Therefore, there is an urgent need for portable, safe and reliable devices to assist in accomplishing valve service.

In order to solve the technical problem, the application provides a valve booster unit, through setting up drive assembly and torque output spare, can assist the operating personnel to carry out rotary switch to manual valve to solve among the prior art manual work have work efficiency low, intensity of labour is big, have the technical problem of potential safety hazard when operating manual valve.

As shown in fig. 1 and 2, the valve booster provided in the embodiment of the present application includes a housing 10, a driving assembly 20 and a torque output member 30.

The housing 10 is intended to be held by a user. The housing 10 is shaped to accommodate the hand of a user, such as a cylinder configuration. The housing 10 has a cavity for accommodating the motor 21, the driving shaft 22, the bearing, the mount, the fixing frame, and the like.

The driving assembly 20 is disposed in the inner cavity of the housing 10, and the driving assembly 20 includes a motor 21 and a driving shaft 22 in driving connection with an output shaft 211 of the motor 21.

The torque output member 30 is in transmission connection with the driving shaft 22, the torque output member 30 is provided with a connecting portion 31 for connecting a valve rod of a valve to be opened and closed, and the torque output by the motor 21 is sequentially transmitted to the driving shaft 22, the torque output member 30 and the connecting portion 31 and then drives the valve rod of the valve to rotate through the connecting portion 31.

According to the valve boosting device provided by the embodiment of the application, before operation, a hand wheel of a valve is required to be dismantled, after the connecting part 31 is directly or indirectly connected with the valve rod, the starting motor 21 drives the driving shaft 22, the torque output piece 30 and the connecting part 31 to rotate, and then the connecting part 31 drives the valve rod to rotate, so that the operation of manually driving the hand wheel and the valve rod to rotate is replaced. According to the valve booster provided by the embodiment of the application, the motor 21 is used as a power source to replace manual torque output to the valve rod, so that the labor intensity of operators is reduced, and the working efficiency is improved; the working efficiency is improved, so that the residence time of operators on site is obviously reduced, the contact time of dangerous goods is further reduced, and the health and safety of the operators are ensured; and when the valve is opened and closed, the hands of the operator are not in direct contact with the valve, so that the risk that the hands are squeezed by the valve is reduced, meanwhile, the attention can be transferred to the field environment, the safety during operation is further improved, and the safety is more sensitive to dangerous conditions of the field environment.

Alternatively, the connection 31 of the torque output member 30 and the valve stem may be directly connected.

Specifically, the connecting portion 31 may be shaped as a special shaft inserted into a shaft groove corresponding to the valve stem, thereby fixing the connecting portion 31 and the valve stem in the circumferential direction and enabling synchronous rotation.

Specifically, the connecting portion 31 may be a sleeve, which is sleeved on the outside of the valve rod, and is fixed to the valve rod in the circumferential direction so as to be rotatable in synchronization with the valve rod.

Alternatively, the connection 31 of the torque output member 30 and the valve stem may be indirectly connected.

Specifically, an engagement member, such as a sleeve or a coupler, is detachably provided between the connection portion 31 and the valve stem, so that the connection portion 31 and the valve stem can be circumferentially fixed and can be rotated synchronously.

Alternatively, the motor 21 may be a servo motor stepper motor capable of controlling the rotational speed, or may be a conventional pneumatic motor, hydraulic motor, or electric motor.

Specifically, in order to reduce the equipment cost, the ordinary motor 21 is selected as a power source.

As shown in fig. 3-5, in one embodiment, the drive assembly 20 further includes a speed change mechanism 23 drivingly connected between the motor 21 and the drive shaft 22, the torque of the drive shaft 22 and the torque output member 30 being variable by shifting the speed change mechanism 23.

In this embodiment, in order to enable the torque and rotational speed of the valve assist device to be adjusted, valves of different resistances are applied. For this purpose, a speed change mechanism 23 is added between the motor 21 and the drive shaft 22, and the torque and the rotational speed of the drive shaft 22 and the torque output member 30 can be changed by performing a change operation of the speed change mechanism 23.

In operation, the valve opening and closing operation can be performed by opening the device by selecting the appropriate gear of the speed change mechanism 23 according to the condition of the field valve.

Alternatively, the speed change mechanism 23 may be a continuously variable speed change mechanism. Specifically, the speed change mechanism 23 is a belt-type continuously variable speed change mechanism.

In order to save manufacturing costs and running costs, a speed change gear set is employed as the speed change mechanism 23. As shown in fig. 3 to 5, in one embodiment, the output shaft 211 and the driving shaft 22 of the motor 21 are respectively sleeved with a main rotation gear set 212 and a secondary rotation gear 221, and the main rotation gear set 212 includes a large main rotation gear 212a, a middle main rotation gear 212b and a small main rotation gear 212c for matching the gear revolution.

The speed change mechanism 23 includes an output gear 231 engaged with the driven gear 221, and a large transmission gear 232, a middle transmission gear 233 and a small transmission gear 234 for performing the gear revolution matching, wherein the output gear 231, the large transmission gear 232, the middle transmission gear 233 and the small transmission gear 234 are all sleeved on a movable shaft 235, and both ends of the movable shaft 235 extend to the outside of the casing 10 for the user to push.

The pushed movable shaft 235 can axially move and drive the large transmission gear 232, the middle transmission gear 233 and the small transmission gear 234 to move so as to mesh with the corresponding small main rotation gear 212c, the middle main rotation gear 212b and the large main rotation gear 212a, thereby realizing the change of the torque of the driving shaft 22 and the torque output member 30 by performing the change operation on the speed change mechanism 23.

The layout of the large main gear 212a, the middle main gear 212b, and the small main gear 212c on the output shaft 211 of the motor 21 is such that the middle main gear 212b, the small main gear 212c, and the large main gear 212a are arranged in this order from left to right.

The layout of the output gear 231, the large transmission gear 232, the middle transmission gear 233, and the small transmission gear 234 on the movable shaft 235 is such that the middle transmission gear 233, the large transmission gear 232, the small transmission gear 234, and the output gear 231 are arranged in this order from left to right.

The power is equal to the product of torque and rotational speed, i.e. the greater the rotational speed the less torque the output of the motor 21 is at rated. The transmission 23 in this embodiment provides three torque adjustment schemes for the drive shaft 22 and the torque output member 30, the specific adjustment process being as follows:

first, as shown in fig. 3, the user pushes the movable shaft 235 to the rightmost end, so that the large main rotating gear 212a is meshed with the small transmission gear 234, and the torque of the motor 21 is sequentially transmitted through the output shaft 211, the large main rotating gear 212a, the small transmission gear 234, the movable shaft 235, the output gear 231, the auxiliary rotating gear 221, the driving shaft 22 and the torque output member 30, at this time, the rotation speed of the driving shaft 22 and the torque output member 30 is the largest, the torque is the smallest, and the valve with small resistance can be correspondingly rotated.

Secondly, as shown in fig. 4, the user pushes the movable shaft 235 leftwards on the basis of the first state to enable the small main rotating gear 212c to be meshed with the large transmission gear 232, and the torque of the motor 21 is sequentially transmitted through the output shaft 211, the small main rotating gear 212c, the large transmission gear 232, the movable shaft 235, the output gear 231, the driven rotating gear 221, the driving rotating shaft 22 and the torque output member 30, at the moment, the rotating speed of the driving rotating shaft 22 and the torque output member 30 is minimum, the torque is maximum, and the valve with large resistance can be correspondingly rotated.

Third, as shown in fig. 5, the user pushes the movable shaft 235 leftwards on the basis of the second state, so that the middle main rotating gear 212b is meshed with the middle transmission gear 233, and the torque of the motor 21 is sequentially transmitted through the output shaft 211, the middle main rotating gear 212b, the middle transmission gear 233, the movable shaft 235, the output gear 231, the driven rotating gear 221, the driving rotating shaft 22 and the torque output member 30, at this time, the rotating speeds of the driving rotating shaft 22 and the torque output member 30 are moderate, the torque is moderate, and the valve with relatively low rotating resistance can be correspondingly arranged.

When the speed change gear set is changed, the output gear 231 is always engaged with the driven gear 221 to maintain a transmission connection.

Alternatively, the output shaft 211, the driving shaft 22 and the movable shaft 235 are mounted and supported on the housing 10 by bearings provided correspondingly.

As shown in fig. 3-5, in one embodiment, the inner cavity of the housing 10 is provided with a first shaft mounting seat 11 and a second shaft mounting seat 12 which are oppositely arranged, the output shaft 211 and the movable shaft 235 are rotatably connected between the first shaft mounting seat 11 and the second shaft mounting seat 12, the movable shaft 235 can also axially move on the first shaft mounting seat 11 and the second shaft mounting seat 12, and the outer side of the second shaft mounting seat 12 is rotatably connected with the driving shaft 22.

The present embodiment further defines how the output shaft 211 and the movable shaft 235 are mounted on the housing 10. Through setting up axle mount pad one 11 and axle mount pad two 12 in the inner chamber of casing 10, the both ends of output shaft 211 are rotated respectively and are connected on axle mount pad one 11 and axle mount pad two 12, and the loose axle 235 is also rotated and is connected on axle mount pad one 11 and axle mount pad two 12 to the loose axle 235 still can be on axle mount pad one 11 and axle mount pad two 12 axial activity, and the user can promote the loose axle 235 and move about, so that drive gear and corresponding main gear engagement.

In addition, the present embodiment further defines the manner in which the drive shaft 22 is mounted on the housing 10. One end of the driving shaft 22 can be rotatably connected to the outer side of the second shaft mounting seat 12, and the other end of the driving shaft 22 can be mounted in the housing 10 through a bearing.

Alternatively, the first shaft mounting seat 11 and the second shaft mounting seat 12 may be provided with shaft holes, and the output shaft 211, the driving shaft 22 and the movable shaft 235 may be directly inserted into the shaft holes for rotational connection.

Optionally, bearings may be added in the shaft holes to further reduce the rotational resistance of the output shaft 211, the driving shaft 22, and the movable shaft 235, and the first shaft mount 11 and the second shaft mount 12.

Specifically, the inner ring of the bearing is connected with the output shaft 211, the driving rotating shaft 22 and the movable shaft 235, and the outer ring is fixed with the hole wall of the shaft hole.

In one embodiment, the valve boosting device further comprises:

and an overload protection mechanism for connecting or disconnecting the drive shaft 22 and the torque output member 30 so as to disconnect the drive shaft 22 from the torque output member 30 when the valve stem is rotated into place.

To better protect the valve assist device and the components of the valve to be opened and closed, and to prevent damage to components such as the drive gear, the valve stem threads, etc., the overload protection mechanism can disconnect the drive shaft 22 from the torque output member 30 when the valve stem is rotated into place.

Alternatively, the overload protection mechanism may be an automated mechanism, such as a sensor and a controller, wherein the resistance of the drive shaft increases rapidly after the valve stem is rotated into place, and the resistance value of the drive shaft is monitored by the sensor and sent to the controller, and the controller immediately controls the motor 21 to stop after receiving the information.

As shown in fig. 6 and 7, in one embodiment, the overload protection mechanism includes an elastic member 41 and a guide groove 42, where a portion of the driving shaft 22 near the torque output member 30 is slidably disposed in the guide groove 42, and the driving shaft 22 can swing in the guide groove 42 to connect or disconnect the driving shaft 22 and the torque output member 30, and the elastic member 41 is connected between the housing 10 and the driving shaft 22, so as to provide a restoring force for the driving shaft 22 during swinging.

The design of the overload protection mechanism is specifically limited in this embodiment. The overload protection mechanism mainly comprises an elastic member 41 and a guide groove 42, in normal use, as shown in fig. 6, the elastic member 41 pulls the driving shaft 22 upwards, so that the driving shaft 22 is in transmission connection with the torque output member 30, when the valve rod rotates in place, the torque output member 30 stops rotating, the driving shaft 22 is further under the torque action of the motor 21, the driving shaft 22 can move radially under the condition that the circumference is limited, and under the guide action of the guide groove 42, as shown in fig. 7, the driving shaft 22 swings downwards and is disconnected from the transmission of the torque output member 30.

Alternatively, the guide groove 42 may be formed by a round cake in the housing 10.

Alternatively, in order to reduce the rotational friction resistance of the driving shaft 22 in the guide groove 42, a bearing may be sleeved on the driving shaft 22 and then placed in the guide groove 42 through the bearing, and an outer ring of the bearing is slidably connected with a groove wall of the guide groove 42.

Alternatively, the elastic member 41 may be a spring, a tension spring, a rubber sheet, or the like.

In one embodiment, the axis of rotation of the drive shaft 22 and the torque output member 30 are perpendicular to each other.

For convenience of use, the driving shaft 22 is prevented from being vertically located above the valve stem, so that a user can operate the valve stem laterally of the valve, and therefore, in this embodiment, the rotation axes of the driving shaft 22 and the torque output member 30 are perpendicular to each other.

Alternatively, a worm may be provided on the driving shaft 22, and a worm wheel may be provided at the bottom of the torque output member 30, so that the rotation axes of the driving shaft 22 and the torque output member 30 are perpendicular to each other.

In one embodiment, as shown in fig. 6 and 7, the drive shaft 22 and the torque output member 30 are respectively sleeved with a first bevel gear 222 and a second bevel gear 32, which are inherently meshed.

As described above, the rotation axes of the drive shaft 22 and the torque output member 30 are perpendicular to each other, and in this embodiment, this can be achieved by bevel gears. Wherein, bevel gears are also called bevel gears, are used for the transmission between intersecting shafts, and can change the transmission direction.

Specifically, the first solid bevel gear 222 is sleeved at the end of the driving shaft 22, the second solid bevel gear 32 is sleeved at the bottom of the torque output member 30, and the first bevel gear 222 and the second bevel gear 32 are meshed, so that the driving shaft 22 is in transmission connection with the torque output member 30, and the rotation axes of the driving shaft 22 and the torque output member 30 are mutually perpendicular.

In one embodiment, the ratio of the length of the drive shaft 22 to the overall length of the valve assist device is 4 to 6:10.

in order to better protect the user, the hand of the user is relatively far from the torque output member 30, and meanwhile, the driving shaft 22 has a certain length to enable the end to have a certain elasticity, so that the driving shaft 22 can swing up and down to be separated from the torque output member 30, therefore, in the embodiment, the ratio of the length of the driving shaft 22 to the overall length of the valve booster is 4-6: 10.

in one embodiment, the motor 21 is a pneumatic motor or a hydraulic motor.

In some use environments, the motor 21 cannot be electrically powered in view of explosion protection requirements, and is typically powered down for maintenance.

In view of the above, it is preferable to use a pneumatic motor or a hydraulic motor.

Pneumatic motors, also known as pneumatic motors, refer to devices that convert the pressure energy of compressed air into rotational mechanical energy. The pneumatic motor is classified into: vane type pneumatic motor, piston type pneumatic motor, compact vane type pneumatic motor, compact piston type pneumatic motor.

The hydraulic motor is an actuator of the hydraulic system, which converts the hydraulic pressure energy provided by the hydraulic pump into mechanical energy (torque and rotational speed) of its output shaft 211. Liquid is the medium that transmits forces and movements.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes and substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A valve assist device, comprising:

a housing (10) for a user to hold;

the driving assembly (20) is arranged in the inner cavity of the shell (10), and the driving assembly (20) comprises a motor (21) and a driving rotating shaft (22) in transmission connection with an output shaft (211) of the motor (21);

the torque output piece (30) is in transmission connection with the driving shaft (22), and the torque output piece (30) is provided with a connecting part (31) for connecting a valve rod of a valve to be opened and closed so as to drive the valve rod to rotate through the connecting part (31) to open and close the valve;

the drive assembly (20) further comprises a speed change mechanism (23) in transmission connection between the motor (21) and the drive shaft (22);

an output shaft (211) of the motor (21) and the driving shaft (22) are respectively sleeved with a main rotating gear set (212) and a secondary rotating gear (221), and the main rotating gear set (212) comprises a large main rotating gear (212 a), a middle main rotating gear (212 b) and a small main rotating gear (212 c) for matching the rotation numbers of the gears;

the speed change mechanism (23) comprises an output gear (231) meshed with the driven rotating gear (221), and a large transmission gear (232), a middle transmission gear (233) and a small transmission gear (234) for matching the rotation number of the gears, wherein the output gear (231), the large transmission gear (232), the middle transmission gear (233) and the small transmission gear (234) are sleeved and fixed on a movable shaft (235), and two ends of the movable shaft (235) extend to the outside of the shell (10) for pushing by a user;

the pushed movable shaft (235) can axially move and drive the large transmission gear (232), the middle transmission gear (233) and the small transmission gear (234) to move so as to mesh with the corresponding small main rotation gear (212 c), the middle main rotation gear (212 b) and the large main rotation gear (212 a), so that the torque of the driving rotating shaft (22) and the torque output piece (30) can be changed by performing a change operation on the speed change mechanism (23).

2. Valve boosting device according to claim 1, characterized in that the inner cavity of the housing (10) is provided with a first shaft mounting seat (11) and a second shaft mounting seat (12) which are oppositely arranged, the output shaft (211) and the movable shaft (235) are rotatably connected between the first shaft mounting seat (11) and the second shaft mounting seat (12), the movable shaft (235) can also axially move on the first shaft mounting seat (11) and the second shaft mounting seat (12), and the outer side of the second shaft mounting seat (12) is rotatably connected with the driving shaft (22).

3. The valve assist device of claim 1 or 2, further comprising:

and the overload protection mechanism is used for connecting or disconnecting the driving rotating shaft (22) and the torque output piece (30) so as to disconnect the transmission of the driving rotating shaft (22) and the torque output piece (30) when the valve rod rotates in place.

4. A valve boosting device according to claim 3, wherein the overload protection mechanism comprises an elastic member (41) and a guide groove (42), the part of the driving shaft (22) close to the torque output member (30) is slidably arranged in the guide groove (42), the driving shaft (22) can swing in the guide groove (42) to connect or separate the driving shaft (22) and the torque output member (30), and the elastic member (41) is connected between the housing (10) and the driving shaft (22) to provide a restoring force for the driving shaft (22) when swinging.

5. Valve aid according to claim 1, characterized in that the rotation axis of the drive shaft (22) and the rotation axis of the torque output element (30) are perpendicular to each other.

6. Valve aid according to claim 5, characterized in that the drive shaft (22) and the torque output element (30) are respectively sleeved with a bevel gear one (222) and a bevel gear two (32) which are inherently meshed.

7. Valve assistance device according to any one of claims 1, 2, 4-6, characterized in that the ratio of the length of the drive shaft (22) to the overall length of the valve assistance device is 4-6: 10.

8. valve aid according to any one of claims 1, 2, 4-6, characterized in that the motor (21) is a pneumatic motor or a hydraulic motor.