CN114704685B - Magnetic transmission gearbox state judging method and device without in-place switch - Google Patents
Magnetic transmission gearbox state judging method and device without in-place switch Download PDFInfo
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- CN114704685B CN114704685B CN202210264741.5A CN202210264741A CN114704685B CN 114704685 B CN114704685 B CN 114704685B CN 202210264741 A CN202210264741 A CN 202210264741A CN 114704685 B CN114704685 B CN 114704685B
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- valve
- sector gear
- gearbox
- state
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Classifications
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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
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
- F16K37/0041—Electrical or magnetic means for measuring valve parameters
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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
- F16K31/042—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor for rotating valves with electric means, e.g. for controlling the motor or a clutch between the valve and the motor
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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
- F16K31/535—Mechanical actuating means with toothed gearing for rotating valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Transmission Device (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention discloses a state judging method of a magnetic transmission gearbox without an in-place switch, which is applied to a composite transmission system of magnetic transmission and gear transmission, wherein a final transmission wheel of the gear transmission is a sector gear, when the sector gear rotates clockwise to a first side to be blocked and stopped in a first clamping groove, the gearbox is in a first locked state, and when the sector gear rotates anticlockwise to a second side to be blocked and stopped in a second clamping groove, the gearbox is in a second locked state, and the method comprises the following steps: an elastic piece is arranged in the first clamping groove and the second clamping groove respectively, and when the sector gear is clamped and stopped, the elastic piece is in a compressed state, so that the current rising edge time during locked rotation is prolonged, and the time when the current is larger than a set value is longer than the set time; and (3) collecting valve control current at fixed time to judge the valve in place, and judging that the valve is blocked when the valve control current is longer than the set value and longer than the set time. The invention realizes effective judgment of the locked-rotor state of the gearbox.
Description
Technical Field
The invention relates to the technical field of gearboxes, in particular to a method and a device for judging the state of a magnetic transmission gearbox without an in-place switch.
Background
The gearbox is widely applied to the fields of water meters, electric meters, gas meters and the like. In general, a gearbox is provided with an in-place switch as a standard for state judgment. Because the in-place switch is easy to damage in long-term use, and repair or replacement cost is very high, so that the in-place switch is canceled, and the state judgment is carried out by detecting the current through the controller instead, so that the problem of damage of the switch can be effectively avoided.
However, in an application scenario such as a water meter, the motor is easily damaged because the device is operated in a state where water is present for a long period of time. Therefore, the motor is isolated from water by changing the traditional all-gear transmission into a mode of combining magnetic transmission and gear transmission. However, the state of the transmission mode in the locked-rotor state cannot be judged by the current detection mode of the original controller.
Disclosure of Invention
The invention aims to solve the technical problem of providing a magnetic transmission gearbox state judging method without an in-place switch, so as to effectively judge the locked-rotor state of the gearbox.
In a first aspect, the present invention provides a method for judging a state of a magnetic transmission gearbox without an in-place switch, which is applied to a magnetic transmission and gear transmission composite transmission system, wherein a final stage transmission wheel of the gear transmission is a sector gear, when the sector gear rotates clockwise to a first side to be blocked in a first clamping groove, the gearbox is in a first locked state, and when the sector gear rotates anticlockwise to a second side to be blocked in a second clamping groove, the gearbox is in a second locked state, and the method includes:
an elastic piece is arranged in the first clamping groove and the second clamping groove respectively, and when the sector gear is clamped and stopped, the elastic piece is in a compressed state, so that the current rising edge time during locked rotation is prolonged, and the time when the current is larger than a set value is longer than the set time;
and (3) collecting valve control current at fixed time to judge the valve in place, and judging that the valve is blocked when the valve control current is longer than the set value and longer than the set time.
Optionally, the set value is 200mA, and the set time is 375ms.
Optionally, the elastic element is a spring with a positioning plate.
In a second aspect, the present invention provides a magnetic transmission gearbox state judging device without an in-place switch, which is applied to a magnetic transmission and gear transmission composite transmission system, wherein a final stage transmission wheel of the gear transmission is a sector gear, when the sector gear rotates clockwise to a first side to be blocked in a first clamping groove, the gearbox is in a first locked state, and when the sector gear rotates anticlockwise to a second side to be blocked in a second clamping groove, the gearbox is in a second locked state, the device includes:
the elastic piece is respectively arranged in the first clamping groove and the second clamping groove, and is in a compressed state when the sector gear is clamped and stopped;
the detection module is electrically connected with the valve and is used for collecting valve control current at fixed time to judge the valve in place, and when the valve control current is longer than the set value and longer than the set time, the valve is judged to be blocked.
Optionally, the set value is 200mA, and the set time is 375ms
Optionally, the elastic element is a spring with a positioning plate.
The technical scheme provided by the embodiment of the invention has the following technical effects or advantages:
through setting up the elastic component, works as sector gear card stops, the elastic component is compression state to the current rising edge time when elongating the locked-rotor makes the time that the electric current is greater than the setting value be greater than the settlement time, makes the locked-rotor state effectively by detecting, avoids continuously gathering and causes unnecessary electric quantity consumption.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present invention more readily apparent.
Drawings
The invention will be further described with reference to examples of embodiments with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a valve control flow of a valve controlled water meter according to the prior art;
FIG. 2 is a schematic diagram of a magnetic transmission gearbox according to a first embodiment of the present invention;
FIG. 3 is a flow chart of a method according to a first embodiment of the invention;
fig. 4 is a schematic structural diagram of a device in a second embodiment of the present invention.
Detailed Description
According to the method and the device for judging the state of the magnetic transmission gearbox without the in-place switch, the state of locked-rotor of the gearbox is effectively judged.
According to the technical scheme in the embodiment of the application, the overall thought is as follows:
the running water factory can open and close the valve remotely according to the use condition of a user, the water meter used is the valve control water meter, a water meter module is adopted to control a motor executing mechanism, and the motor controls the rotation of the ball valve through a gear set, so that the valve is opened/closed.
(1) When the water meter is powered on for the first time, the valve is opened, and after the action is completed, the valve state is stored as the valve opening.
(2) The valve state of the last valve is judged before the valve is operated every time. When resetting, the valve state before power-off and after power-on is ensured to be consistent.
(3) The water meter should set a default state according to the last received upper computer instruction, if the last received valve opening instruction, the default state should open the valve, if the last received valve closing instruction, the default state should close the valve, and if the valve control instruction is not received yet by the current time, the default state should open the valve.
(4) When the valve is switched, the VCC voltage and the valve control chip voltage are sampled once every 125ms, the voltage difference is calculated, and the current I of the current valve control circuit is calculated CURRENT . The valve control circuit cancels the in-place switch, and all states of the valve are judged by the current of the current valve control current.
(5) Valve control current: normal action current defaults to 10-200mA
The valve blocking current defaults to 200-350mA.
The abnormal current defaults to less than 10mA, or greater than 350mA.
Actual test results (without water and at 0.9MPa pipe network pressure respectively):
all-gear driven valve control system action current: 15-92mA, and the blocking current is 253-264 mA;
magnetic transmission and gear transmission combined valve control system action current: 24-147mA, and the blocking current is 251mA-260mA.
In addition, if the valve is not connected, the test current is within 1 mA.
(6) Before the valve is operated, the valve should be braked (actually, stopped) for 2 seconds, and then the valve is opened and closed.
(7) Until the lowest in-place time, no in-place determination is made. If the rotation is blocked for 1 time continuously in the in-place time range, the in-place time is considered.
(8) Valve effective action time:
the effective valve opening and closing time of the temporary various valves under various environments is 7-20 seconds.
Actual test results (without water and at 0.9MPa pipe network pressure respectively):
the valve control system of the all-gear transmission is 10-12.4 seconds.
The magnetic drive and gear drive combined valve control system is 11.4-13.2 seconds.
The time to live is adjusted by 2 seconds as a whole, considering the secondary low power.
(9) Valve failure
Valve failure a: the valve is still in place without the minimum actuation time.
Valve failure B: the valve is not closed, resulting in water running after closing the valve.
Valve failure C: valve circuit failure may result in too much or too little current.
Valve failure D, the valve is still not in place after 20 seconds of opening and closing. It may be that the motor or valve is problematic. (comprising on/off two fault states)
(10) And storing and reporting valve faults, and judging and processing according to the current fault state of each valve after the valve is completely operated.
(11) After the valve is closed, if the maximum flow rate is detected to exceed 100L/H, the valve is opened and closed once, the valve is opened and closed at most 1 time a day, and the post fault B is executed for 3 times.
The valve control action flow is shown in figure 1.
The invention aims to solve the problem of effectively judging the locked-rotor state of the valve-controlled water meter combining magnetic transmission and gear transmission.
Due to the adoption of the magnetic transmission system, when the power supply voltage of the motor is large, the demagnetization condition occurs, namely the current is changed from 60-200mA in a vibration mode, the period is 188ms, and the original detection program can not judge the blocking and stop the valve under the condition. Thus, the present invention lengthens the current rise time by improving the magnetic drive system. Ensuring that the current is greater than 200mA for more than 375ms (3 x 125 ms) even if valve demagnetization occurs. The scheme can accurately and effectively judge the valve locked rotation.
The invention starts from solving the problem of the magnetic transmission valve control water meter, but the method is not limited to the valve control water meter, and can be used in the fields of oil meters, gas meters and the like.
Example 1
The present embodiment provides a method for judging a state of a magnetic transmission gearbox without an in-place switch, as shown in fig. 2 and 3, which is applied to a magnetic transmission and gear transmission composite transmission system, wherein a final transmission wheel of the gear transmission is a sector gear 1, when the sector gear 1 rotates clockwise until a first side 11 is blocked by a first clamping groove 21, the gearbox is in a first locked state, and when the sector gear 1 rotates anticlockwise until a second side 12 is blocked by a second clamping groove 22, the gearbox is in a second locked state, and the method includes:
an elastic piece 3 is respectively arranged in the first clamping groove 21 and the second clamping groove 22, and when the sector gear 1 is clamped and stopped, the elastic piece 3 is in a compressed state, so that the current rising edge time during locked rotation is prolonged, and the time when the current is larger than a set value is longer than the set time;
and (5) collecting valve control current at fixed time to judge the in-place condition of the valve 5, and judging that the valve 5 is blocked when the valve control current is longer than the set value and longer than the set time.
In a preferred embodiment, the set point is 200mA and the set time is 375ms.
In a preferred embodiment, the elastic member 3 is a spring with a positioning plate. The installation method is that the locating plate is fixedly connected with the spring, and then the locating plate is clamped in the clamping groove to realize fixation. Other elastic members may be used, so long as they can generate a certain force on the sector gear 1 when the side edge of the sector gear 1 is about to contact the clamping groove, and can deform along with the rotation of the sector gear 1 until the side edge of the sector gear 1 is clamped in the clamping groove.
Based on the same inventive concept, the present application also provides a device corresponding to the method in the first embodiment, and details of the second embodiment are described in the following.
Example two
In this embodiment, as shown in fig. 4, a magnetic transmission gearbox state judging device without an in-place switch is provided, the magnetic transmission gearbox state judging device is applied to a magnetic transmission and gear transmission composite transmission system, a final transmission wheel of the gear transmission is a sector gear 1, when the sector gear 1 rotates clockwise until a first side 11 is blocked by a first clamping groove 21, the gearbox is in a first locked state, and when the sector gear 1 rotates anticlockwise until a second side 12 is blocked by a second clamping groove 22, the gearbox is in a second locked state, and the device comprises:
an elastic member 3 disposed in the first clamping groove 21 and the second clamping groove 22, respectively, and when the sector gear 1 is clamped and stopped, the elastic member 3 is in a compressed state;
the detection module 4 is electrically connected with the valve 5, the valve 5 is connected with the sector gear 1, the detection module 4 is used for collecting valve control current at regular time to judge that the valve 5 is in place, and when the valve control current is longer than a set value and longer than the set time, the valve 5 is judged to be blocked.
In a preferred embodiment, the set value is 200mA and the set time is 375ms
In a preferred embodiment, the elastic member 3 is a spring with a positioning plate.
Since the device described in the second embodiment of the present invention is a device for implementing the method described in the first embodiment of the present invention, based on the method described in the first embodiment of the present invention, a person skilled in the art can understand the specific structure and the deformation of the device, and thus the detailed description thereof is omitted herein. All devices used in the method according to the first embodiment of the present invention are within the scope of the present invention.
According to the invention, the elastic piece is arranged, when the sector gear is blocked, the elastic piece is in a compressed state, so that the current rising edge time during locked rotation is prolonged, the time when the current is larger than the set value is longer than the set time, the locked rotation state can be effectively detected, and unnecessary electric quantity consumption caused by continuous collection is avoided.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that the specific embodiments described are illustrative only and not intended to limit the scope of the invention, and that equivalent modifications and variations of the invention in light of the spirit of the invention will be covered by the claims of the present invention.
Claims (6)
1. A state judging method of a magnetic transmission gearbox without an in-place switch is characterized by comprising the following steps of: be applied to magnetic drive and gear drive's compound transmission system, gear drive's final stage drive wheel is the sector gear, when the sector gear clockwise rotation is to first side card stop in first draw-in groove, and the gearbox is first locked-rotor state, when the sector gear anticlockwise rotation is to second side card stop in second draw-in groove, the gearbox is the second locked-rotor state, the method includes:
an elastic piece is arranged in the first clamping groove and the second clamping groove respectively, and when the sector gear is clamped and stopped, the elastic piece is in a compressed state, so that the current rising edge time during locked rotation is prolonged, and the time when the current is larger than a set value is longer than the set time;
and (3) collecting valve control current at fixed time to judge the valve in place, and judging that the valve is blocked when the valve control current is longer than the set value and longer than the set time.
2. The method according to claim 1, characterized in that: the set value is 200mA, and the set time is 375ms.
3. The method according to claim 1, characterized in that: the elastic piece is a spring with a locating plate.
4. A magnetic transmission gearbox state judging device without an in-place switch is characterized in that: be applied to magnetic drive and gear drive's compound transmission system, gear drive's final stage drive wheel is the sector gear, when the sector gear clockwise rotation is to first side card stop in first draw-in groove, and the gearbox is first locked-rotor state, when the sector gear anticlockwise rotation is to second side card stop in second draw-in groove, and the gearbox is the second locked-rotor state, the device includes:
the elastic piece is respectively arranged in the first clamping groove and the second clamping groove, and is in a compressed state when the sector gear is clamped and stopped;
the detection module is electrically connected with the valve and is used for collecting valve control current at fixed time to judge the valve in place, and when the valve control current is longer than the set value and longer than the set time, the valve is judged to be blocked.
5. The apparatus according to claim 4, wherein: the set value is 200mA, and the set time is 375ms.
6. The apparatus according to claim 4, wherein: the elastic piece is a spring with a locating plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210264741.5A CN114704685B (en) | 2022-03-17 | 2022-03-17 | Magnetic transmission gearbox state judging method and device without in-place switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210264741.5A CN114704685B (en) | 2022-03-17 | 2022-03-17 | Magnetic transmission gearbox state judging method and device without in-place switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114704685A CN114704685A (en) | 2022-07-05 |
| CN114704685B true CN114704685B (en) | 2023-07-28 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202149800U (en) * | 2011-07-08 | 2012-02-22 | 谈晓彬 | Wired remote transmission valve control water meter |
| CN107448663B (en) * | 2016-05-31 | 2019-05-17 | 中核新能核工业工程有限责任公司 | It is a kind of to close the gentle electronic rotating cylinder vacuum valve of DN400 of quick washing |
| JP6761761B2 (en) * | 2017-01-19 | 2020-09-30 | 株式会社サタケ | Piezoelectric actuators, anomaly detection circuits, and piezoelectric valve systems |
| CN107606300B (en) * | 2017-09-22 | 2019-06-18 | 九阳股份有限公司 | A kind of plasma discharge rotary valve control method of food processor |
| CN113494638A (en) * | 2020-03-19 | 2021-10-12 | 杭州巨星科技股份有限公司 | Valve control device |
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