CN114183576B - Electric valve with double transmission mechanisms - Google Patents
Electric valve with double transmission mechanisms Download PDFInfo
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- CN114183576B CN114183576B CN202210133087.4A CN202210133087A CN114183576B CN 114183576 B CN114183576 B CN 114183576B CN 202210133087 A CN202210133087 A CN 202210133087A CN 114183576 B CN114183576 B CN 114183576B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/041—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves
- F16K31/043—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/005—Valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Mechanically-Actuated Valves (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
The invention relates to an electric valve with double transmission mechanisms. The electric valve is characterized in that a driving gear is arranged above a valve rod of the electric valve, and the driving gear can drive the valve rod to do lifting or rotating motion, so that the electric valve performs valve opening or valve closing action; the driving gear is meshed with a valve opening gear set and a valve closing gear set which are independent to each other and respectively drive the driving gear to open and close the valve; the valve opening gear set is driven by the first clutch mechanism, the valve closing gear set is driven by the second clutch mechanism, and the first clutch mechanism and the second clutch mechanism are both driven by the power mechanism. The switch valve of the invention belongs to two different sets of transmission mechanisms, and the problem of too fast or too slow valve closing time is well solved; for the large-caliber and medium-high pressure valve, the valve can be closed by means of the energy storage mechanism in the initial stage of valve closing, and the valve can be closed by means of the torque force of the energy storage mechanism, and then the valve closing gear set is used for driving the valve to close when the valve is closed quickly in place.
Description
Technical Field
The invention relates to an electric valve with double transmission mechanisms.
Background
In the gas industry, mainly in the field of industrial intelligent gas meters, including membrane type gas meters and flow meters, all electric control valves are installed, in most cases, electric valves in the field are downstream-flow valve closing, the valve closing torque is small by means of gas pressure when the valve is closed, the valve opening is counter-flow valve opening, and the valve opening needs to overcome the gas pressure when the valve is opened, so that the valve opening needs larger torque and is reflected on a reduction ratio, and the valve closing reduction ratio can be smaller than the valve opening reduction ratio, so that the valve closing time is shorter than the valve opening time. The electric valve used at present has two forms of opening and closing valves, one is slow opening and slow closing, namely, the time for opening and closing the valve is longer and equal, the other is slow opening and fast closing, and the slow opening and the valve closing are completed instantly. The valve which is opened slowly and closed slowly is long in closing time, the valve is closed within several minutes generally, a control circuit is provided with a special valve closing battery or power supply, and the valve cannot be closed quickly when the user runs out of gas or an emergency occurs. The valve which is slowly opened and quickly closed is normally closed within 3s due to the short valve closing time, so that the meter stops working instantly, and mechanical parts in the meter are easily damaged, thereby causing abnormal metering. Therefore, it is necessary to design an electric valve which can flexibly set the valve opening and closing time.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a technical scheme of an electric valve with a double transmission mechanism.
The electric valve with the double transmission mechanisms is characterized in that: a driving gear is arranged above a valve rod of the electric valve and can drive the valve rod to do lifting or rotating motion, so that the electric valve performs valve opening or valve closing actions; the driving gear is meshed with a valve opening gear set and a valve closing gear set which are independent to each other and respectively drive the driving gear to open and close the valve; the valve opening gear set is driven by the first clutch mechanism, the valve closing gear set is driven by the second clutch mechanism, and the first clutch mechanism and the second clutch mechanism are both driven by the power mechanism; the clutch mechanism I and the clutch mechanism II are arranged on the same axis but do not interfere with each other, when the clutch mechanism I and the valve opening gear set are combined into a set of transmission mechanism to be meshed with each other for transmission and valve opening, the clutch mechanism II and the valve closing gear set are disengaged, and when the clutch mechanism II and the valve closing gear set are combined into another set of transmission mechanism to be meshed with each other for transmission and valve closing, the clutch mechanism I and the valve opening gear set are disengaged.
The electric valve with the double transmission mechanisms is characterized in that the valve opening gear set and the valve closing gear set can be designed into different gear levels according to requirements of the electric valve, and the valve opening reduction ratio and the valve closing reduction ratio are different, so that the valve opening time and the valve closing time are different.
The electric valve with the double transmission mechanisms is characterized in that the power mechanism drives the first clutch mechanism and the second clutch mechanism to act through the double thread sleeve, the power mechanism drives the double thread sleeve to rotate, and the double thread sleeve drives the first clutch mechanism and the second clutch mechanism to rotate; the external thread on the upper part of the double-thread sleeve is set as a right-handed thread, the external thread on the lower part of the double-thread sleeve is set as a left-handed thread, the uppermost section of the upper part of the double-thread sleeve is not provided with threads, and the uppermost section of the lower part of the double-thread sleeve is not provided with threads; the external thread on the upper part of the double-thread sleeve is matched with the first clutch mechanism, the external thread on the lower part of the double-thread sleeve is matched with the second clutch mechanism, and when the double-thread sleeve rotates, the first clutch mechanism and the second clutch mechanism execute the action of rotating in opposite directions.
The electric valve with the double transmission mechanisms is characterized in that the power mechanism comprises a direct current motor and a reduction gearbox, the reduction gearbox is fixed on the lower portion of the direct current motor through screws, a double-thread sleeve is tightly fixed on an output shaft of the reduction gearbox, the direct current motor drives the reduction gearbox to rotate, and the output shaft of the reduction gearbox drives the double-thread sleeve to rotate.
The electric valve with the double transmission mechanisms is characterized in that the first clutch mechanism comprises a first clutch mechanism transition sleeve, a first clutch mechanism pinion, a first one-way gear shaft, a first one-way bearing and a clutch mechanism swing rod, wherein a first internal thread is arranged above the first clutch mechanism transition sleeve and matched with an external thread on the upper part of the double thread sleeve; the other end of the first swing rod of the clutch mechanism is provided with a first one-way gear shaft, a first one-way bearing is arranged outside the first one-way gear shaft in a matched mode, a first one-way gear is arranged outside the first one-way bearing in a matched mode, and the first one-way gear is meshed with a pinion of the clutch mechanism.
The electric valve with the double transmission mechanisms is characterized in that the second clutch mechanism comprises a second clutch mechanism transition sleeve, a connecting rod, a second clutch mechanism pinion, a second one-way gear shaft, a second one-way bearing and a second clutch mechanism swing rod, a second internal thread is arranged above the second clutch mechanism transition sleeve and matched with an external thread at the lower part of the double thread sleeve, the second clutch mechanism transition sleeve is tightly pressed and matched with the upper part of the connecting rod through a bolt, the lower part of the connecting rod is tightly pressed and matched with the second clutch mechanism pinion through a bolt, a bearing is arranged inside the second clutch mechanism pinion, a small connecting rod is arranged in the bearing, and the lower part of the small connecting rod is fixed with one end of the second clutch mechanism swing rod, so that the second clutch mechanism swing rod can rotate around the second clutch mechanism pinion; the other end of the second oscillating bar of the clutch mechanism is provided with a second one-way gear shaft, a second one-way bearing is arranged outside the second one-way gear shaft in a matched mode, a second one-way gear is arranged outside the second one-way bearing in a matched mode, and the second one-way gear is meshed with a second pinion of the clutch mechanism.
The electric valve with the double transmission mechanisms is characterized in that a connecting rod of the second clutch mechanism penetrates downwards through a pinion of the first clutch mechanism to be tightly connected with a pinion of the second clutch mechanism.
The electric valve with the double transmission mechanisms is characterized in that the first one-way bearing and the second one-way bearing are oppositely and reversely mounted, so that the first one-way gear can only rotate clockwise, and the second one-way gear can only rotate anticlockwise.
The electric valve with the double transmission mechanisms is characterized in that when the second clutch mechanism descends to the lower end of the lower part of the double-thread sleeve to perform rotary motion, the second clutch mechanism can drive the valve closing gear set to move, and meanwhile, the first clutch mechanism ascends to the upper end of the upper part of the double-thread sleeve and then is separated from the external thread and does not move any more; on the contrary, when the first clutch mechanism descends to the lower end of the upper part of the double-thread sleeve to perform rotary motion, the first clutch mechanism can drive the valve opening gear set to move, and meanwhile, the second clutch mechanism ascends to the upper end of the lower part of the double-thread sleeve and then is separated from the external thread and does not move any more.
The electric valve with the double transmission mechanisms is characterized in that the power mechanism is fixed on a cover plate of the electric valve through a stud, and the valve opening gear set and the valve closing gear set are also arranged on the cover plate of the electric valve corresponding to the clutch mechanism I and the clutch mechanism II.
The first clutch mechanism and the valve opening gear set are combined into one set of mechanism to execute the valve opening function, the second clutch mechanism and the valve closing gear set are combined into the other set of mechanism to execute the valve closing function, and the switch valve belongs to two different sets of transmission mechanisms, so that the problem of too fast or too slow valve closing time is well solved. For the large-caliber and medium-high pressure valve, the valve can be closed by means of the energy storage mechanism in the initial stage of valve closing, and the valve can be closed by means of the torque force of the energy storage mechanism, and then the valve closing gear set is used for driving the valve to close when the valve is closed quickly in place. By adopting the invention, for the low-pressure valve, the valve opening time is about 20s to 60s, the valve closing time can be controlled to about 10s, for the medium-high pressure valve, the valve opening time is about 60s to several minutes, the valve closing time can be controlled to about 20s, the control circuit does not need to additionally increase a valve closing battery, and the valve can be closed only by using a super capacitor, so that the energy consumption is reduced, the cost is reduced, and unnecessary disputes are avoided.
Drawings
FIG. 1 is a main sectional view of a first clutch mechanism on the upper end of the upper part of a double-thread sleeve and a second clutch mechanism on the lower end of the lower part of the double-thread sleeve when a valve is closed;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a main sectional view of the clutch mechanism I at the lower end of the upper part of the double-thread sleeve and the clutch mechanism II at the upper end of the lower part of the double-thread sleeve when the valve is opened;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a front cross-sectional view of a first clutch mechanism of the present invention;
FIG. 6 is a front sectional view of a second clutch mechanism of the present invention;
FIG. 7 is a front cross-sectional view of the double threaded sleeve of the present invention;
FIG. 8 is a top plan view of the present invention in the closed valve state;
FIG. 9 is a side view of the present invention in the closed valve state;
FIG. 10 is a plan view of the present invention in an open state;
FIG. 11 is a side view of the present invention in an open state;
in the figure: 1-a direct current motor; 2-a reduction gearbox; 3-double thread sleeve; 4-a clutch mechanism I; 5-a clutch mechanism II; 6-a stud; 7-a transition sleeve of the clutch mechanism; 8-a pinion of the clutch mechanism; 9-a first one-way gear; 10-a first unidirectional gear shaft; 11-a first one-way bearing; 12-a swing rod of the clutch mechanism; 13-a second transition sleeve of the clutch mechanism; 14-a connecting rod; 15-clutch mechanism two pinion; 16-a second oscillating bar of the clutch mechanism; 9 a-a second one-way gear; 10 a-a second unidirectional gear shaft; 11 a-a second one-way bearing, 17-an electric valve, 18-a cover plate, 19-a valve closing gear set, 20-a valve opening gear set, 21-a driving gear and 22-a valve rod.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
a driving gear 21 is arranged above a valve rod 22 of an electric valve 17, and the driving gear 21 can drive the valve rod 22 to do lifting or rotating motion, so that the electric valve 17 performs valve opening or valve closing action; the driving gear 21 is meshed with a valve opening gear set 20 and a valve closing gear set 19, the valve opening gear set 20 and the valve closing gear set 19 are independent of each other and respectively drive the driving gear 21 to open and close the valve, the valve opening gear set 20 and the valve closing gear set 19 can be designed into different gear levels according to requirements on the electric valve, and the valve opening reduction ratio and the valve closing reduction ratio are different, so that the valve opening time and the valve closing time are different; the valve opening gear set 20 is driven by a first clutch mechanism 4, the valve closing gear set 19 is driven by a second clutch mechanism 5, and the first clutch mechanism 4 and the second clutch mechanism 5 are both driven by a power mechanism; the first clutch mechanism 4 and the second clutch mechanism 5 are arranged on the same axis but do not interfere with each other, when the first clutch mechanism 4 and the valve opening gear set 20 are combined into a set of transmission mechanism to be meshed for transmission and valve opening, the second clutch mechanism 5 and the valve closing gear set 19 are disengaged, and when the second clutch mechanism 5 and the valve closing gear set 19 are combined into another set of transmission mechanism to be meshed for transmission and valve closing, the first clutch mechanism 4 and the valve opening gear set 20 are disengaged, and the two mechanisms do not work simultaneously.
Specifically, the power mechanism is fixed on a cover plate 18 of the electric valve 17 through a stud 6, and a valve opening gear set 20 and a valve closing gear set 19 which correspond to the clutch mechanism I4 and the clutch mechanism II 5 are also arranged on the cover plate 18 of the electric valve.
The power mechanism drives the first clutch mechanism 4 and the second clutch mechanism 5 to act through the double-thread sleeve 3, the power mechanism drives the double-thread sleeve 3 to rotate, and the double-thread sleeve 3 drives the first clutch mechanism 4 and the second clutch mechanism 5 to rotate; the external thread on the upper part of the double-thread sleeve 3 is set as a right-hand thread, the external thread on the lower part of the double-thread sleeve 3 is set as a left-hand thread, the uppermost section on the upper part of the double-thread sleeve 3 is not provided with threads, and the uppermost section on the lower part of the double-thread sleeve 3 is not provided with threads; the external thread on the upper portion of the double-thread sleeve 3 is matched with the first clutch mechanism 4, the external thread on the lower portion of the double-thread sleeve 3 is matched with the second clutch mechanism 5, when the double-thread sleeve 3 rotates, the first clutch mechanism 4 and the second clutch mechanism 5 are enabled to execute opposite-direction rotation actions, and the first clutch mechanism 4 and the second clutch mechanism 5 slip and do not move when moving to the corresponding non-thread position of the double-thread sleeve 3.
The power mechanism comprises a direct current motor 1 and a reduction gearbox 2, the reduction gearbox 2 is fixed on the lower portion of the direct current motor 1 through screws, a double-thread sleeve 3 is tightly fixed on an output shaft of the reduction gearbox 2, the direct current motor 1 drives the reduction gearbox 2 to rotate, and the output shaft of the reduction gearbox 2 drives the double-thread sleeve 3 to rotate.
The clutch mechanism I4 comprises a clutch mechanism I transition sleeve 7, a clutch mechanism I pinion 8, a first one-way gear 9, a first one-way gear shaft 10, a first one-way bearing 11 and a clutch mechanism I swing rod 12, wherein a first internal thread is arranged above the clutch mechanism I transition sleeve 7 and matched with an external thread on the upper part of the double-thread sleeve 3, the clutch mechanism I transition sleeve 7 is tightly pressed and matched with the upper part of the clutch mechanism I pinion 8 through a bolt, the lower part of the clutch mechanism I pinion 8 is inserted and arranged at one end of the clutch mechanism I swing rod 12, and a clamp spring for limiting the clutch mechanism I pinion 8 is arranged below the clutch mechanism I swing rod 12, so that the clutch mechanism I swing rod 12 can rotate around the clutch mechanism I pinion 8; the other end of the first swing rod 12 of the clutch mechanism is provided with a first one-way gear shaft 10, a first one-way bearing 11 is arranged outside the first one-way gear shaft 10 in a matched mode, a first one-way gear 9 is arranged outside the first one-way bearing 11 in a matched mode, and the first one-way gear 9 is meshed with a pinion 8 of the clutch mechanism.
The second clutch mechanism 5 comprises a second clutch mechanism transition sleeve 13, a connecting rod 14, a second clutch mechanism pinion 15, a second one-way gear 9a, a second one-way gear shaft 10a, a second one-way bearing 11a and a second clutch mechanism swing rod 16, wherein a second internal thread is arranged above the second clutch mechanism transition sleeve 13 and matched with an external thread at the lower part of the double-thread sleeve 3, the second clutch mechanism transition sleeve 13 is tightly matched with the upper part of the connecting rod 14 through bolt pressing, the lower part of the connecting rod 14 is tightly matched with the second clutch mechanism pinion 15 through bolt pressing, a bearing is arranged inside the second clutch mechanism pinion 15, a small connecting rod is arranged in the bearing, and the lower part of the small connecting rod is fixed with one end of the second clutch mechanism swing rod 16, so that the second clutch mechanism swing rod 16 can rotate around the second clutch mechanism pinion 15; the other end of the second oscillating bar 16 of the clutch mechanism is provided with a second one-way gear shaft 10a, a second one-way bearing 11a is arranged outside the second one-way gear shaft 10a in a matched mode, a second one-way gear 9a is arranged outside the second one-way bearing 11a in a matched mode, and the second one-way gear 9a is meshed with a second pinion 15 of the clutch mechanism. The connecting rod 14 of the second clutch mechanism 5 penetrates downwards through the first clutch mechanism pinion 8 to be tightly connected with the second clutch mechanism pinion 15, and the first clutch mechanism 4 and the second clutch mechanism 5 are arranged on the same axis and do not interfere with each other.
The first one-way bearing 11 and the second one-way bearing 11a are oppositely and reversely mounted, so that the first one-way gear 9 can only rotate clockwise, and the second one-way gear 9a can only rotate anticlockwise.
During action, when the second clutch mechanism 5 descends to the lower end of the lower part of the double-thread sleeve 3 to perform rotary motion, the second clutch mechanism can drive the valve closing gear set 19 to move, and meanwhile, the first clutch mechanism 4 ascends to the upper end of the upper part of the double-thread sleeve 3 and is separated from the external thread and does not move any more; on the contrary, when the first clutch mechanism 4 descends to the lower end of the upper part of the double-thread sleeve 3 to perform rotary motion, the first clutch mechanism can drive the valve opening gear set 20 to move, and meanwhile, the second clutch mechanism 5 ascends to the upper end of the lower part of the double-thread sleeve 3 and then is separated from the external thread and does not move any more.
When the power mechanism is powered on to work in the forward direction, the second clutch mechanism 5 is driven to rotate anticlockwise to be separated from the valve closing gear set 19, the second clutch mechanism 5 stops working after being separated from the valve closing gear set 19, meanwhile, the first clutch mechanism 4 is driven by the power mechanism to rotate anticlockwise to be meshed with the valve opening gear set 20, the valve opening gear set 20 is driven to rotate and drive the driving gear 21 to rotate, and the driving gear 21 drives the valve rod 22 to do lifting or rotating motion to complete valve opening.
When the power mechanism is electrified and works reversely, the first clutch mechanism 4 is driven to rotate clockwise to separate from the valve gear set 20, the first clutch mechanism 4 stops working after separating from the valve gear set 20, meanwhile, the second clutch mechanism 5 is driven by the power mechanism to rotate clockwise to engage with the valve gear set 19, so that the valve gear set 19 rotates and drives the driving gear 21 to rotate, and the driving gear 21 drives the valve rod 22 to do lifting or rotating motion to complete valve closing.
Example one
In the electric valve, a reduction gearbox 2 is fixed at the lower part of a direct current motor 1 through screws, a double-thread sleeve 3 is tightly fixed on an output shaft of the reduction gearbox 2, the external thread at the upper part of the double-thread sleeve 3 is a right-handed thread and is matched with a first internal thread above a first transition sleeve 7 of a clutch mechanism on a first clutch mechanism 4 in a right-handed way, the external thread at the lower part of the double-thread sleeve 3 is a left-handed thread and is matched with a second internal thread on a second transition sleeve 13 of a clutch mechanism on a second clutch mechanism 5 in a left-handed way.
A pair of gear pairs, namely a first clutch mechanism pinion 8 and a first one-way gear 9 gear pair, and a second clutch mechanism pinion 15 and a second one-way gear 9a gear pair, are respectively arranged on a first clutch mechanism swing rod 12 and a second clutch mechanism swing rod 16, a first one-way bearing 11 is arranged on an inner ring of the first one-way gear 9, an outer ring of the first one-way bearing 11 is tightly matched with an inner ring of the first one-way gear 9, an inner ring of the first one-way bearing 11 is in transition fit with a first one-way gear shaft 10, and the second one-way gear 9a, the second one-way gear shaft 10a and the second one-way bearing 11a are similarly arranged due to the one-way rotation characteristic of the first one-way bearing 11; when the clutch mechanism is installed, the first one-way bearing 11 and the second one-way bearing 11a on the two clutch mechanisms are oppositely and reversely installed, so that the first one-way gear 9 on the first clutch mechanism 4 can only rotate clockwise and cannot rotate anticlockwise, and the second one-way gear 9a on the second clutch mechanism 5 can only rotate anticlockwise and cannot rotate clockwise.
For two pairs of relatively independent gear pairs on the first clutch mechanism 4 and the second clutch mechanism 5, when the pinion 8 of the first clutch mechanism rotates anticlockwise, the swing rod 12 of the first clutch mechanism is driven to swing anticlockwise, and meanwhile, the first one-way gear 9 rotates clockwise; when the second pinion 15 of the clutch mechanism rotates clockwise, the second swing link 16 of the clutch mechanism is driven to swing clockwise, and meanwhile, the second one-way gear 9a rotates anticlockwise.
When the direct current motor 1 rotates anticlockwise, the reduction gearbox 2 and the double-thread sleeve 3 are driven to rotate anticlockwise, a gear pair on the clutch mechanism II 5 is prevented from rotating due to the action of the second one-way bearing 11a, a swing rod 16 of the clutch mechanism II swings anticlockwise for a certain angle, the clutch mechanism II 5 moves upwards in a straight line manner, and when a threaded part on a transition sleeve 13 of the clutch mechanism II completely moves upwards to a position without threads at the upper end of the lower part of the double-thread sleeve 3, the clutch mechanism II 5 does not move any more; meanwhile, under the action of gravity, a first clutch mechanism transition sleeve 7 on a first clutch mechanism 4 is matched with the external threads on the upper portion of the double-thread sleeve 3 and drives the first clutch mechanism 4 to do downward linear motion, when the first clutch mechanism 4 moves to the bottom of the external threads on the upper portion of the double-thread sleeve 3, the first clutch mechanism transition sleeve 7 and the double-thread sleeve 3 are tightly connected, the first clutch mechanism transition sleeve 7 does anticlockwise rotation motion along with the double-thread sleeve 3 and drives a first clutch mechanism pinion 8 to anticlockwise rotate, so that a first clutch mechanism swing rod 12 swings anticlockwise, and meanwhile, the first one-way gear 9 rotates clockwise. Fig. 3, 4, 10, and 11 are final states.
The valve is in the open valve state, namely regard figure 3, figure 4, figure 10, figure 11 as the initial state, when the direct current motor 1 rotates clockwise, drive the reduction box 2 and double-thread set 3 to rotate clockwise, have the function of the first one-way bearing 11 to stop the rotation of the gear pair on the clutch mechanism one 4, make a swing link 12 of the clutch mechanism swing certain angle clockwise and make the clutch mechanism one 4 make the straight line movement upwards, when the threaded part on the transition set 7 of the clutch mechanism goes up to the upper end of double-thread set 3 upper portion and has no thread position completely, the clutch mechanism one 4 no longer moves; meanwhile, under the action of gravity, a second clutch mechanism transition sleeve 13 on the second clutch mechanism 5 is matched with the external thread on the lower portion of the double-thread sleeve 3 and drives the second clutch mechanism 5 to do downward linear motion, when the second clutch mechanism 5 moves to the bottom of the external thread on the lower portion of the double-thread sleeve 3, the second clutch mechanism transition sleeve 13 is tightly connected with the double-thread sleeve 3, the second clutch mechanism transition sleeve 13 does clockwise rotation motion along with the double-thread sleeve 3 and drives a second clutch mechanism pinion 15 to rotate clockwise, so that a second clutch mechanism swing rod 16 swings clockwise, and meanwhile, the second one-way gear 9a rotates anticlockwise. Fig. 1, 2, 8, and 9 are final states.
In the field of industrial intelligent gas meters, an electric control valve is installed in each membrane type gas meter and each flow meter, in most cases, the electric valve in the field is a forward flow closing valve, the valve closing torque is very small when the valve is closed by means of gas pressure, the valve opening torque is a reverse flow opening valve, and the valve opening torque needs to be overcome when the valve is opened, so that the valve opening torque needs to be larger, the valve closing speed reduction ratio is reflected on the speed reduction ratio, the valve closing speed reduction ratio does not need to be consistent with the valve opening speed reduction ratio, and the valve opening time and the valve closing time can be completely different. The electric valve used at present has two forms of opening and closing valves, wherein one is slow opening and slow closing, namely the time for opening and closing the valve is longer and equal, the other is slow opening and fast closing, and the slow opening and the valve closing are completed instantly, and the two forms are two extreme ends in terms of the time for closing the valve and have certain defects. The valve closing time is too slow and too long, the energy of a super capacitor on a control circuit is not enough to maintain the valve closing, a special battery or other power supply is required to be equipped for valve closing, the cost problem of the battery or other power supplies can be involved, the alternating current is extremely unsafe, and when an emergency condition, such as gas leakage, occurs, the valve cannot be closed quickly, and the great potential safety hazard can be brought. The valve closing time is too fast (generally the valve closing is completed in 3 s), the meter is enabled to stop working instantly, mechanical parts in the meter are easy to damage, and normal metering cannot be achieved, such feedback is often received in practical use, in addition, the valve which is closed quickly is easy to be interfered by pipeline vibration when being installed on a pipeline with higher pressure and larger caliber, and the valve is automatically closed when the valve is not required to be closed, so that huge economic loss is caused for users, for example, the product is fired by gas for the porcelain tile industry, and if the gas is suddenly stopped, the product in the whole furnace can be scrapped. The invention relates to an electric valve with double transmission mechanisms, which well solves the problem of too fast or too slow valve closing time. For the large-caliber and medium-high pressure valve, the valve can be closed by means of the energy storage mechanism in the initial stage of valve closing, and the valve can be closed by means of the torque force of the energy storage mechanism, and then the valve closing gear set is used for driving the valve to close when the valve is closed quickly in place. By adopting the invention, for the low-pressure valve, the valve opening time is about 20s to 60s, the valve closing time can be controlled to about 10s, for the medium-high pressure valve, the valve opening time is about 60s to several minutes, the valve closing time can be controlled to about 20s, the control circuit does not need to additionally increase a valve closing battery, and the valve can be closed only by using a super capacitor, so that the energy consumption is reduced, the cost is reduced, and unnecessary disputes are avoided.
Claims (9)
1. The utility model provides an electrically operated valve with two drive mechanism which characterized in that: a driving gear is arranged above a valve rod of the electric valve and can drive the valve rod to do lifting or rotating motion, so that the electric valve performs valve opening or valve closing actions; the driving gear is meshed with a valve opening gear set and a valve closing gear set which are independent to each other and respectively drive the driving gear to open and close the valve; the valve opening gear set is driven by the first clutch mechanism, the valve closing gear set is driven by the second clutch mechanism, and the first clutch mechanism and the second clutch mechanism are both driven by the power mechanism; the clutch mechanism I and the clutch mechanism II are arranged on the same axis but do not interfere with each other, when the clutch mechanism I and the valve opening gear set are combined into a set of transmission mechanism to be meshed with the transmission valve opening, the clutch mechanism II and the valve closing gear set are disengaged, and when the clutch mechanism II and the valve closing gear set are combined into another set of transmission mechanism to be meshed with the transmission valve closing, the clutch mechanism I and the valve opening gear set are disengaged;
the power mechanism drives the first clutch mechanism and the second clutch mechanism to act through the double-thread sleeve, the power mechanism drives the double-thread sleeve to rotate, and the double-thread sleeve drives the first clutch mechanism and the second clutch mechanism to rotate; the external thread on the upper part of the double-thread sleeve is set as a right-handed thread, the external thread on the lower part of the double-thread sleeve is set as a left-handed thread, the uppermost section of the upper part of the double-thread sleeve is not provided with threads, and the uppermost section of the lower part of the double-thread sleeve is not provided with threads; the external thread on the upper part of the double-thread sleeve is matched with the first clutch mechanism, the external thread on the lower part of the double-thread sleeve is matched with the second clutch mechanism, and when the double-thread sleeve rotates, the first clutch mechanism and the second clutch mechanism execute the action of rotating in opposite directions.
2. The electric valve with double transmission mechanisms as claimed in claim 1, wherein the valve opening gear set and the valve closing gear set can be designed into different gear stages according to requirements of the electric valve, and the valve opening reduction ratio and the valve closing reduction ratio are different, so that the valve opening time and the valve closing time are different.
3. The electrically operated valve with double transmission mechanisms as claimed in claim 1, wherein the power mechanism comprises a DC motor and a reduction gearbox, the reduction gearbox is fixed at the lower part of the DC motor through screws, a double thread sleeve is tightly fixed on an output shaft of the reduction gearbox, the DC motor drives the reduction gearbox to rotate, and the output shaft of the reduction gearbox drives the double thread sleeve to rotate.
4. The electric valve with double transmission mechanisms according to claim 1 or 3, wherein the first clutch mechanism comprises a first clutch mechanism transition sleeve, a first clutch mechanism pinion, a first one-way gear shaft, a first one-way bearing and a clutch mechanism swing rod, a first internal thread is arranged above the first clutch mechanism transition sleeve and is matched with an external thread on the upper part of the double thread sleeve, the first clutch mechanism transition sleeve is tightly pressed and matched with the upper part of the clutch mechanism pinion through a bolt, the lower part of the clutch mechanism pinion is inserted and arranged at one end of the first clutch mechanism swing rod, and a clamp spring for limiting the clutch mechanism pinion is arranged below the first clutch mechanism swing rod, so that the first clutch mechanism swing rod can rotate around the clutch mechanism pinion; the other end of the first swing rod of the clutch mechanism is provided with a first one-way gear shaft, a first one-way bearing is arranged outside the first one-way gear shaft in a matched mode, a first one-way gear is arranged outside the first one-way bearing in a matched mode, and the first one-way gear is meshed with a pinion of the clutch mechanism.
5. The electric valve with double transmission mechanisms according to claim 4, wherein the second clutch mechanism comprises a second clutch mechanism transition sleeve, a connecting rod, a second clutch mechanism pinion, a second one-way gear shaft, a second one-way bearing and a second clutch mechanism swing rod, a second internal thread is arranged above the second clutch mechanism transition sleeve and is matched with an external thread at the lower part of the double thread sleeve, the second clutch mechanism transition sleeve is tightly pressed and matched with the upper part of the connecting rod through a bolt, the lower part of the connecting rod is tightly pressed and matched with the second clutch mechanism pinion through the bolt, a bearing is arranged inside the second clutch mechanism pinion, a small connecting rod is arranged in the bearing, and the lower part of the small connecting rod is fixed with one end of the second clutch mechanism swing rod, so that the second clutch mechanism swing rod can rotate around the second clutch mechanism pinion; the other end of the second oscillating bar of the clutch mechanism is provided with a second one-way gear shaft, a second one-way bearing is arranged outside the second one-way gear shaft in a matched mode, a second one-way gear is arranged outside the second one-way bearing in a matched mode, and the second one-way gear is meshed with a second pinion of the clutch mechanism.
6. An electrically operated valve with dual drive as claimed in claim 5 wherein the connecting rod of said second clutch is fixedly connected to the second clutch pinion downwardly through the first clutch pinion.
7. An electrically operated valve with dual drive as claimed in claim 5 wherein said first one-way bearing and said second one-way bearing are oppositely mounted such that said first one-way gear can only rotate clockwise and said second one-way gear can only rotate counter clockwise.
8. The electrically operated valve with the double transmission mechanisms according to any one of claims 1, 3, 5, 6 and 7, wherein the second clutch mechanism descends to the lower end of the lower part of the double thread sleeve to perform a rotary motion, so as to drive the gear set for closing the valve to move, and meanwhile, the first clutch mechanism ascends to the upper end of the upper part of the double thread sleeve and then is separated from the external thread and does not move any more; on the contrary, when the first clutch mechanism descends to the lower end of the upper part of the double-thread sleeve to perform rotary motion, the first clutch mechanism can drive the valve opening gear set to move, and meanwhile, the second clutch mechanism ascends to the upper end of the lower part of the double-thread sleeve and then is separated from the external thread and does not move any more.
9. The electric valve with the double transmission mechanisms as claimed in claim 1, wherein the power mechanism is fixed on a cover plate of the electric valve through a stud, and the valve opening gear set and the valve closing gear set are also arranged on the cover plate of the electric valve corresponding to the clutch mechanism I and the clutch mechanism II.
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| CN202210133087.4A CN114183576B (en) | 2022-02-14 | 2022-02-14 | Electric valve with double transmission mechanisms |
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| CN202210133087.4A CN114183576B (en) | 2022-02-14 | 2022-02-14 | Electric valve with double transmission mechanisms |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201757183U (en) * | 2010-04-19 | 2011-03-09 | 杭州先锋电子技术股份有限公司 | Explosion-preventing slow-opening and fast-closing cut-off type motor valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04210175A (en) * | 1990-12-13 | 1992-07-31 | Kubota Corp | Device for opening and closing gate |
| KR100838025B1 (en) * | 2007-01-19 | 2008-06-12 | 주식회사 경동나비엔 | Flow control valve |
| CN101581383A (en) * | 2009-04-30 | 2009-11-18 | 杭州先锋电子技术有限公司 | Slow-open fast-shutoff mechanism of motor valve |
| CN201496644U (en) * | 2009-09-12 | 2010-06-02 | 张晓明 | Gas smart switch |
| CN104180049B (en) * | 2014-09-05 | 2016-06-08 | 上海诺特飞博燃烧设备有限公司 | The Drive And Its Driving Method of a kind of slow opening fast shutting safety valve |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201757183U (en) * | 2010-04-19 | 2011-03-09 | 杭州先锋电子技术股份有限公司 | Explosion-preventing slow-opening and fast-closing cut-off type motor valve |
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