CN114951102A

CN114951102A - Flowmeter washing device

Info

Publication number: CN114951102A
Application number: CN202210574558.5A
Authority: CN
Inventors: 李华; 张勇; 王旭芳; 胡红英
Original assignee: Wuhan Shengyu Drainage Systems Co Ltd
Current assignee: Wuhan Shengyu Smart Ecological Environmental Protection Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-08-30
Anticipated expiration: 2042-05-25
Also published as: CN114951102B

Abstract

The invention relates to the technical field of flushing equipment, in particular to a flowmeter flushing device; the vacuum pipe and the water inlet pipe are fixed on the water storage tank and communicated with the water storage cavity, the vacuum pipe is connected with the vacuumizing device, and before the flushing device flushes, the vacuumizing device vacuumizes the inside of the water storage cavity through the vacuum pipe to enable the inside of the water storage cavity to form negative pressure, so that an external water source can be introduced into the water storage cavity through the water inlet pipe orifice under the action of external air pressure; because the end of intaking and the water storage chamber intercommunication of flushing unit, the topography of the end of flushing unit is less than the topography in water storage chamber for when carrying out the washing during operation of flowmeter, the clear water accessible self gravity of water storage intracavity is flushed the end by the end flow direction of intaking, realizes flushing the flowmeter of end of flushing, effectively alleviates the flowmeter and washes the energy loss of process.

Description

Flowmeter washing unit

Technical Field

The invention relates to the technical field of flushing equipment, in particular to a flowmeter flushing device.

Background

The flowmeter is an instrument or instrument for measuring the flow rate of fluid in a pipeline or an open channel, and is classified into a differential pressure flowmeter, a rotor flowmeter, a throttling flowmeter, an ultrasonic flowmeter and the like, and takes a doppler ultrasonic flowmeter as an example. The Doppler ultrasonic flowmeter is widely applied to the fields of natural riverways, artificial riverways, farmland channels, urban sewers, enterprise sewage outlets, sewage treatment plants and the like, and is used for detecting the flow of fluid containing solid particles or bubbles.

Because the DuPont ultrasonic flowmeter works for a long time and in a water body containing solid particles and sludge, when a probe of the flowmeter is installed in the same direction as the water flow, the water flow can wash the solid particles and the sludge on the surface of the flowmeter, at the moment, the sludge on the surface of the probe is smaller, when the probe of the flowmeter is installed in the opposite direction to the water flow, vortex flows are easily formed on two sides of a probe fixing piece of the flowmeter, so that impurities are deposited in front of the probe, and the measurement accuracy of the probe is influenced, therefore, after the flowmeter works for a period of time, the solid particles and the sludge in front of the probe of the flowmeter need to be washed, and the accurate measurement of the water flow by the flowmeter is ensured.

The existing flow meter is generally washed by a water pump, before washing, the original water flow introduced into the flow meter is firstly cut off, the water pump is used for driving clear water in a water storage tank to the flow meter, solid particles in the front part of a flow meter probe are washed, and through the above washing mode, the water pump needs to be kept in an open state all the time, so that a large amount of energy loss is caused.

Disclosure of Invention

The invention aims to overcome the technical defects and provide a flowmeter washing device, which solves the technical problem that a large amount of electric energy is consumed in the washing process of a flowmeter in the prior art.

In order to achieve the above technical object, a technical solution of the present invention provides a flow meter flushing device, including:

the vacuum pipe is used for connecting an external vacuum device to enable the interior of the water storage cavity to form negative pressure so that an external water source is introduced into the water storage cavity through the water inlet pipe under the action of air pressure;

the vacuumizing device is connected with the vacuum tube and is used for vacuumizing the water storage cavity to enable negative pressure to be formed inside the water storage cavity, so that an external water source is led into the water storage cavity through the water inlet tube under the action of air pressure;

the flushing unit comprises a water inlet end and a flushing end communicated with the water inlet end, the water inlet end is communicated with the water storage cavity, the flushing end is used for connecting a flowmeter, the topography of the flushing end is lower than that of the water storage cavity, so that clean water in the water storage cavity can flow to the flushing end through the gravity of the water inlet end, and the flushing end is flushed by the flowmeter.

Optionally, the washing unit still includes anti-overflow unit, anti-overflow unit includes spacing section of thick bamboo, buoyancy spare and inductor, spacing section of thick bamboo is fixed in the water storage intracavity, the inside of spacing section of thick bamboo be provided with the spacing chamber of water storage chamber intercommunication, spacing chamber court the direction of height in water storage chamber extends, buoyancy spare set up in spacing intracavity can follow under the buoyancy of water spacing chamber goes up and down, the inductor is fixed in on the storage water tank and be located the top of buoyancy spare, the inductor is connected with the controller electricity, the inductor is sensed buoyancy spare rises when a take the altitude, controller control evacuating device stall.

Optionally, the anti-overflow unit still includes an anti-overflow section of thick bamboo, an anti-overflow section of thick bamboo is fixed in on the inner wall in water storage chamber, the inside of an anti-overflow section of thick bamboo is provided with inclosed anti-overflow chamber, the vacuum tube be fixed in the one end of storage water tank with anti-overflow chamber intercommunication, spacing section of thick bamboo is kept away from the one end of the diapire in water storage chamber is fixed in the bottom of an anti-overflow section of thick bamboo, the bottom of an anti-overflow section of thick bamboo is provided with the intercommunication anti-overflow chamber with the blow vent in spacing chamber, the blow vent is located on the rising route of buoyancy spare, buoyancy spare is followed spacing chamber rises when to a take the altitude, right the blow vent carries out the shutoff.

Optionally, the anti-overflow unit still includes the shutoff membrane, the shutoff membrane laminating is fixed in on the diapire in anti-overflow chamber, the blow vent set up in on the shutoff membrane, the blow vent is circular opening, buoyancy spare is provided with the annular seal face, when buoyancy spare rises to a take the altitude, the annular seal face with the lateral wall laminating of blow vent, it is right to carry out the shutoff to the blow vent.

Optionally, the anti-overflow unit still includes the direction stop collar, the one end of direction stop collar is fixed in the bottom of an anti-overflow section of thick bamboo is located week side of blow vent, the other end of direction stop collar court the lateral wall direction in spacing chamber extends, the direction stop collar is used for working as when the buoyancy spare rises, will the buoyancy spare court the direction of blow vent is led, and works as the buoyancy spare shutoff during the blow vent, it is right the horizontal direction of buoyancy spare carries on spacingly.

Optionally, the lateral wall of the limiting cylinder is provided with an air suction port, the air suction port is communicated with the limiting cavity, and one end of the guide limiting sleeve, which is close to the lateral wall of the limiting cavity, extends to one side of the air suction port.

Optionally, the direction stop collar is fixed in the one end of the bottom of an anti-overflow section of thick bamboo is provided with the sealing, the sealing court the direction of blow vent extends, buoyancy spare shutoff during the blow vent, the surface of buoyancy spare with the sealing is close to the terminal surface laminating of blow vent.

Optionally, the flushing device further comprises a blocking unit, an air inlet is further arranged on the surface of the water storage tank, and the blocking unit is used for blocking the air inlet when the vacuumizing device vacuumizes the water storage cavity and opening the air inlet when the flushing unit is used for flushing flow timing.

Optionally, the shutoff unit includes driver, mount and shutoff dish, the mount is fixed in on the storage water tank and be located one side of air inlet, the driver is fixed in on the shutoff dish, the drive end of driver is towards the direction of air inlet extends, the shutoff dish is fixed in on the drive end of driver, the driver is used for when evacuating device is right when the water storage chamber evacuation, the drive the shutoff dish is right the air inlet carries out the shutoff, and when the flushing unit washes the flow timing, the drive the shutoff dish will the air inlet is opened.

Optionally, be provided with expansion tank on the inlet tube, expansion tank's inside is provided with vice water cavity, vice water cavity with the inlet tube intercommunication, vice water cavity is used for to by the inlet tube introduces the partial clear water in water storage cavity is stored.

Compared with the prior art, the flowmeter washing device provided by the invention has the beneficial effects that: the vacuum pipe is used for connecting an external water source, the vacuum pipe is used for connecting the external vacuumizing device, and before the flushing device flushes, the vacuumizing device vacuumizes the inside of the water storage cavity through the vacuum pipe, so that negative pressure is formed inside the water storage cavity, and the external water source can be introduced into the water storage cavity through the water inlet pipe orifice under the action of external air pressure and stored by the water storage cavity; the water inlet end of the flushing unit is communicated with the water storage cavity, and the topography of the flushing end of the flushing unit is lower than that of the water storage cavity, so that when the flowmeter is flushed, clear water in the water storage cavity can flow from the water inlet end to the flushing end through the self gravity, and the flowmeter at the flushing end is flushed; through above structure for the washing process of flowmeter only needs to consume a small amount of energy consumptions when evacuating device evacuation, effectively alleviates the energy loss of flowmeter washing process.

Drawings

Fig. 1 is a schematic structural diagram of a flowmeter flushing device according to an embodiment of the present invention.

Fig. 2 is a partially enlarged view of a point a in fig. 1.

Fig. 3 is a front view of a flow meter flushing device provided by an embodiment of the invention.

Fig. 4 is a schematic view of the structure taken along line a-a in fig. 3.

Fig. 5 is a sectional view of a water storage tank and a plugging unit of the flowmeter flushing device provided by the embodiment of the invention.

Fig. 6 is a partially enlarged view of a portion a in fig. 5.

Wherein, in the figures, the respective reference numerals:

10-water storage tank 11-water storage cavity 12-vacuum tube

13-water inlet pipe 14-air inlet 15-mounting rack

16-annular base 10 a-flowmeter 20-flushing unit

21-water inlet end 22-flushing end 23-flushing pipe

24-solenoid valve 30-anti-overflow unit 31-buoyancy member

32-limiting cylinder 33-inductor 34-anti-overflow cylinder

35-36-guide limiting sleeve-40-plugging unit of plugging membrane

41-driver 42-fixing frame 43-plugging disc

131-auxiliary water tank 132-auxiliary water cavity 133-filtering module

161-sealing bulge 311-annular sealing surface 321-limiting cavity

322-water inlet 323-air suction inlet 341-overflow preventing cavity

342-vent 361-seal.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a flowmeter flushing device, which comprises a water storage tank 10 and a flushing unit 20, wherein a water storage cavity 11 is arranged inside the water storage tank 10, a vacuum tube 12 and a water inlet tube 13 which are communicated with the water storage cavity 11 are fixed on the water storage tank 10, and the water inlet tube 13 is used for connecting an external water source; the vacuum tube 12 is used for connecting a vacuum pumping device to vacuumize the water storage cavity 11, so that negative pressure is formed inside the water storage cavity 11, and an external water source is introduced into the water storage cavity 11 through the water inlet tube 13 under the action of air pressure; the washing unit 20 comprises a water inlet end 21 and a washing end 22 communicated with the water inlet end 21, the water inlet end 21 is communicated with the water storage cavity 11, the washing end 22 is used for being connected with the flowmeter 10a, and the terrain of the washing end 22 is lower than that of the water storage cavity 11, so that clean water in the water storage cavity 11 can flow to the washing end 22 from the water inlet end 21 through gravity, and a front end detection area of the flowmeter 10a of the washing end 22 is washed.

Specifically, by arranging a water storage tank 10, a vacuum device and a washing unit 20, a water storage cavity 11 is arranged inside the water storage tank 10, a vacuum pipe 12 and a water inlet pipe 13 which are communicated with the water storage cavity 11 are fixed on the water storage tank 10,the water inlet pipe 13 is used for connecting the pipes External water sources such as road, pipe culvert, flow dividing well, reservoir and the likeThe vacuum tube 12 is used for connecting a vacuum pumping device, before the flushing device flushes, one end of the water inlet tube 13 exposed outside the water storage tank 10 is connected to external water sources such as pipelines, pipe culverts, split-flow wells, reservoirs and the like, the vacuum pumping device vacuumizes the interior of the water storage cavity 11 through the vacuum tube 12 to enable the interior of the water storage cavity 11 to form negative pressure, and when the negative pressure reaches a certain value, the external water source can be introduced into the water storage cavity 11 through the opening of the water inlet tube 13 under the action of external air pressure and stored by the water storage cavity 11; because the water inlet end 21 of the flushing unit 20 is communicated with the water storage cavity 11, and the topography of the flushing end 22 of the flushing unit 20 is lower than the topography of the water storage cavity 11, when the flowmeter 10a is flushed, clean water in the water storage cavity 11 can flow from the water inlet end 21 to the flushing end 22 through the self gravity, so that the flowmeter 10a of the flushing end 22 is flushed; through the structure, the flow meter 10a only needs to consume a small amount of energy consumption during the vacuumizing process of the vacuumizing device, and the energy consumption of the flow meter 10a during the flushing process is effectively reduced.

It is understood that the water storage tank 10 may have any structure such as a circular structure, a square structure, etc., and the surface of the water storage tank 10 is further provided with a mounting bracket 15 for fixing the water storage tank 10.

In this embodiment, 20L of water should be stored in the water storage cavity 11 to ensure effective flushing of the flowmeter 10 a.

In this embodiment, in order to prevent water in the water storage cavity 11 from overflowing into the vacuum tube 12 during the vacuum pumping process, the vacuum tube 12 is fixed on the top of the water storage tank 10.

In this embodiment, in order to prevent silt from entering the water storage chamber 11, the end of the water inlet pipe 13 connected to the water source is provided with a filtering module 133. Meanwhile, in order to prevent the water in the water storage chamber 11 from flowing back to the water inlet pipe 13, one end of the water inlet pipe 13 fixed to the water storage tank 10 extends toward the top wall of the water storage chamber 11.

It can be understood that the filtering module 133 can be any device capable of filtering the inlet water of the water storage cavity, such as a filter screen, filter cotton, and activated carbon.

It can be understood that the vacuum-pumping device can be any device capable of continuously pumping vacuum to the water storage cavity 11, such as a vacuum pump, a vacuum-pumping machine, etc.

In this embodiment, the flushing unit 20 further includes a flushing pipe 23 and an electromagnetic valve 24, an upper end of the flushing pipe 23 is fixed on the water storage tank 10 and is communicated with the water storage cavity 11, a lower end of the flushing pipe 23 is connected to the flow meter 10a, a water inlet end 21 is formed at one end of the flushing pipe 23 fixed on the water storage tank 10, a flushing end 22 is formed at one end of the flushing pipe 23 connected to the flow meter 10a, the electromagnetic valve 24 is installed on the flushing pipe 23 and is used for controlling on-off of the flushing pipe, when the vacuum pumping device evacuates the water storage tank 10, the electromagnetic valve 24 is closed, and when the flushing pipe 23 flushes the flow meter 10a, the electromagnetic valve 24 is opened.

In the embodiment, the electromagnetic valve 24 is a ball valve with model number DN32-24VS2-B-501-DNZ 2416.

In this embodiment, further, the flushing device is further provided with a controller, and the vacuum pumping device and the solenoid valve 24 are electrically connected with the controller.

It will be appreciated that the surface of the water storage tank 10 may be provided with through holes which may be blocked in order to facilitate the entry of air into the water storage chamber 11 through the through holes.

In this embodiment, the flushing device further comprises a blocking unit 40, the surface of the water storage tank 10 is further provided with an air inlet 14, and the blocking unit 40 is used for blocking the air inlet 14 when the vacuum pumping device pumps vacuum to the water storage cavity 11 and opening the air inlet 14 when the flushing unit 20 flushes the flowmeter 10 a. Specifically, through the arrangement of the air inlet 14, air can be rapidly introduced into the water storage chamber 11 when the flow meter 10a is flushed, so as to accelerate the water inlet of the flushing unit.

In this embodiment, the blocking unit 40 includes a driver 41, a fixing frame 42 and a blocking disc 43, the fixing frame 42 is fixed on the water storage tank 10 and is located at one side of the air inlet 14, the driver 41 is fixed on the blocking disc 43, a driving end of the driver 41 extends towards the air inlet 14, the blocking disc 43 is fixed on a driving end of the driver 41, the driver 41 is used for driving the blocking disc 43 to block the air inlet 14 when the water storage cavity 11 is vacuumized by the vacuuming device, and driving the blocking disc 43 to open the air inlet 14 when the flow meter 10a needs to be washed by the washing unit 20. In particular, by plugging of the plugging disc 43, sealing of the air inlet 14 can be effectively achieved.

It will be appreciated that the actuator 41 may be a pneumatic or hydraulic cylinder.

It will be appreciated that the sealing disk 43 may engage a surface of the tank 10 to effect a seal against the inlet 14 or may engage a side wall of the inlet 14 to effect a seal against the inlet.

In this embodiment, further, in order to realize effective sealing of the blocking disc 43 to the air inlet 14, the surface of the water storage tank 10 is fixed with the annular base 16, the annular base 16 is located on the peripheral side of the air inlet 14, the surface of the annular base 16 is provided with the sealing protrusion 161, and the blocking disc 43 realizes sealing of the air inlet 14 by fitting with the sealing protrusion 161.

Optionally, the flushing device further includes an overflow prevention unit 30, the overflow prevention unit 30 includes a buoyancy element 31, a limiting cylinder 32 and a sensor 33, the limiting cylinder 32 is fixed in the water storage cavity 11, the inside of the limiting cylinder 32 is provided with a limiting cavity 321 communicated with the water storage cavity 11, the limiting cavity 321 extends towards the height direction of the water storage cavity 11, the buoyancy element 31 is arranged in the limiting cavity 321 and can lift along the limiting cavity 321 under the buoyancy effect of water, the sensor 33 is fixed on the water storage cavity 10 and located above the buoyancy element 31, the sensor 33 is electrically connected with the controller, when the sensor 33 senses that the buoyancy element 31 rises to a certain height, the controller controls the vacuumizing device to stop running.

Specifically, because spacing

chamber

321 and 11 intercommunications in water storage chamber, water in the water storage chamber 11 can get into spacing chamber 321, when the water level rose in the water storage chamber 11, can drive buoyancy piece 31 and rise along spacing chamber 321 to make buoyancy piece 31 be close to inductor 33, when buoyancy piece 31 rose to a take the altitude, controller control evacuating device stopped the inside evacuation to storage water tank 10, avoided water level too high in the water storage chamber 11 and entered into evacuating device from vacuum tube 12, caused the harm to evacuating device.

It can be understood that the limiting cylinder 32 can be fixed on any position of the top wall, the side wall or the bottom wall of the water storage cavity 11, and only needs to extend the limiting cavity 321 towards the top of the water storage cavity 11 and communicate with the water storage cavity 11.

In this embodiment, the bottom of the limiting cylinder 32 is provided with a water inlet 322 for water in the water storage cavity 11 to enter the limiting cavity 321.

It will be appreciated that the buoyancy member 31 may be any structure capable of floating on the water.

It is understood that the sensor 33 may be any sensing component having a distance sensing function, such as a proximity switch, a displacement sensor, etc.

Optionally, the anti-overflow unit further includes an anti-overflow barrel 34, the top of the anti-overflow barrel 34 is fixed on the top wall of the water storage cavity 11, the inside of the anti-overflow barrel 34 is provided with a closed anti-overflow cavity 341, one end of the vacuum tube 12 fixed on the water storage cavity 10 is communicated with the anti-overflow cavity 341, one end of the bottom wall of the water storage cavity 11 far away from the limiting barrel 32 is fixed on the bottom of the anti-overflow barrel 34, the bottom of the anti-overflow barrel 34 is provided with a vent 342 communicated with the anti-overflow cavity 341 and the limiting cavity 321, the vent 342 is located on the rising path of the buoyancy member 31, and when the buoyancy member 31 rises to a certain height along the limiting cavity 321, the vent 342 is blocked. Specifically, because the anti-overflow chamber 341 passes through vent 342 and spacing chamber 321 intercommunication, spacing chamber 321 and water storage chamber 11 intercommunication, the tip of vacuum tube 12 extends to in the anti-overflow chamber 341, when to anti-overflow chamber 341 evacuation, can make water storage chamber 11 form the negative pressure, because buoyancy piece 31 rises to the take the altitude along spacing chamber 321, carries out the shutoff to vent 342, can block the intercommunication in anti-overflow chamber 341 and water storage chamber 11, avoids the water in the water storage chamber 11 to enter into in anti-overflow chamber 341 and the vacuum tube 12.

It will be appreciated that the spill-proof cartridge 34 may be secured to the water storage chamber 11 at any location, and the end of the vacuum tube 12 secured to the water storage chamber 10 may extend into the spill-proof chamber 341 in a bent, straight, etc. fashion and through the sidewall of the spill-proof cartridge 34.

In this embodiment, the vacuum tube 12 is fixed to the top of the water storage tank 10 and extends into the water storage cavity 11 along the height direction of the water storage tank 10, and the anti-overflow cylinder 34 is fixed to the top of the water storage cavity 11 and surrounds the opening of the vacuum tube 12, so as to realize the extension of the end of the vacuum tube 12 fixed to the water storage tank 10 toward the anti-overflow cavity 341.

In this embodiment, the buoyancy member 31 may have any structural form such as a square shape, a cylindrical shape, a conical shape, a spherical shape, etc., when the buoyancy member 31 is square or cylindrical, the buoyancy member 31 may be attached to the bottom surface of the anti-overflow cylinder 34 to seal the vent hole 342, and when the buoyancy member 31 is conical or spherical, the buoyancy member 31 may be attached to the side wall of the vent hole 342 or the end surface of the vent hole 342 to seal the vent hole 342.

In this embodiment, for promoting the reliability that buoyancy piece 31 shutoff vent 342, the anti-overflow unit still includes shutoff membrane 35, on shutoff membrane 35 laminating and being fixed in the diapire in anti-overflow chamber 341, vent 342 sets up on shutoff membrane 35, vent 342 is circular opening, buoyancy piece 31 is provided with the sealed face 311 of annular, and when buoyancy piece 31 rose to a take the altitude, the sealed face 311 of annular was laminated with the lateral wall of vent 342 to carry out the shutoff to vent 342. Specifically, by the annular sealing surface 311 abutting the sidewall of the vent port 342, a stable seal of the buoyancy member 31 to the vent port 342 may be achieved.

It will be appreciated that the annular sealing surface 311 may be spherical or conical. In order to ensure the stable ascending and descending of the buoyancy member 31 along the limiting cavity 321, the buoyancy member 31 of the present embodiment is a sphere structure, and meanwhile, the annular sealing surface 311 is a spherical surface.

Optionally, the anti-overflow unit further includes a guiding and limiting sleeve 36, one end of the guiding and limiting sleeve 36 is fixed to the bottom of the anti-overflow barrel 34 and located on the periphery of the vent 342, the other end of the guiding and limiting sleeve extends towards the side wall of the limiting cavity 321, the guiding and limiting sleeve 36 is used for guiding the buoyancy member 31 towards the vent 342 when the buoyancy member 31 ascends, and limiting the horizontal direction of the buoyancy member 31 when the buoyancy member 31 blocks the vent 342. Specifically, the guide and limit sleeve 36 can guide and limit the buoyancy member 31 to achieve stable sealing of the buoyancy member 31 to the vent 342.

Optionally, a suction port 323 is arranged on the side wall of the limiting cylinder 32, the suction port 323 is communicated with the limiting cavity 321, and one end of the guide limiting sleeve 36 close to the side wall of the limiting cavity 321 extends to one side of the suction port 323. Specifically, through the above arrangement of the guide limiting sleeve 36 and the air suction port 323, the guide can be provided for guiding the air in the water storage cavity 11 to the anti-overflow cavity 341, and the air suction to the water storage cavity 11 can be effectively accelerated.

Optionally, a sealing portion 361 is disposed at one end of the guiding and limiting sleeve 36 fixed to the bottom of the spill barrel 34, the sealing portion 361 extends toward the vent 342, and when the buoyancy member 31 blocks the vent 342, the surface of the buoyancy member 31 is attached to the end surface of the sealing portion 361 close to the vent 342. Specifically, the sealing portion 361 may enhance the communication between the buoyancy member 31 and the bottom wall of the anti-overflow barrel 34, and may further separate the limiting cavity 321 and the anti-overflow cavity 341 by fitting to the surface of the buoyancy member 31, so as to effectively prevent water in the limiting cavity 321 from entering the anti-overflow cavity 341.

Optionally, a secondary water tank 131 is disposed on the water inlet pipe 13, a secondary water cavity 132 is disposed inside the secondary water tank 131, the secondary water cavity 132 is communicated with the water inlet pipe 13, and the secondary water cavity 132 is used for storing a part of the clean water introduced into the water storage cavity 11 by the water inlet pipe 13. Specifically, the auxiliary water chamber 132 may store a certain amount of water to prevent the end of the water inlet pipe 13 connected to the water source from being blocked so that the water storage tank 10 cannot be continuously supplied with water.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A flowmeter flushing device, comprising:

the vacuum pipe is used for connecting an external water source, and the vacuum pipe is connected with an external vacuumizing device to enable the inside of the water storage cavity to form negative pressure so that the external water source is led into the water storage cavity through the water inlet pipe under the action of air pressure;

2. The flowmeter washing device as claimed in claim 1, further comprising an overflow prevention unit, wherein the overflow prevention unit comprises a limiting cylinder, a buoyancy member and a sensor, the limiting cylinder is fixed in the water storage cavity, a limiting cavity communicated with the water storage cavity is arranged inside the limiting cylinder, the limiting cavity extends towards the height direction of the water storage cavity, the buoyancy member is arranged in the limiting cavity and can lift along the limiting cavity under the buoyancy effect of water, the sensor is fixed on the water storage cavity and located above the buoyancy member, the sensor is electrically connected with the controller, and when the sensor senses that the buoyancy member rises to a certain height, the controller controls the vacuumizing device to stop running.

3. The flowmeter washing device as claimed in claim 2, wherein the overflow prevention unit further comprises an overflow prevention barrel, the overflow prevention barrel is fixed on the inner wall of the water storage cavity, a closed overflow prevention cavity is arranged inside the overflow prevention barrel, one end of the vacuum tube, which is fixed on the water storage cavity, is communicated with the overflow prevention cavity, one end of the bottom wall of the water storage cavity, which is far away from the limiting barrel, is fixed at the bottom of the overflow prevention barrel, a vent hole, which is communicated with the overflow prevention cavity and the limiting cavity, is arranged at the bottom of the overflow prevention barrel, is located on a rising path of the buoyancy member, and the vent hole is blocked when the buoyancy member rises to a certain height along the limiting cavity.

4. The flowmeter washing device as claimed in claim 3 wherein the overflow prevention unit further comprises a blocking membrane attached and fixed to the bottom wall of the overflow prevention chamber, the vent is disposed on the blocking membrane, the vent is a circular opening, the buoyancy member is provided with an annular sealing surface, and when the buoyancy member rises to a certain height, the annular sealing surface is attached to the side wall of the vent to block the vent.

5. The flowmeter washing device as claimed in claim 3, wherein the overflow prevention unit further comprises a guide limit sleeve, one end of the guide limit sleeve is fixed to the bottom of the overflow prevention barrel and is located at the peripheral side of the vent port, the other end of the guide limit sleeve extends towards the side wall direction of the limit cavity, and the guide limit sleeve is used for guiding the buoyancy member towards the direction of the vent port when the buoyancy member rises, and limiting the horizontal direction of the buoyancy member when the buoyancy member blocks the vent port.

6. The flowmeter flushing device as claimed in claim 5, wherein the side wall of the limiting cylinder is provided with a suction port, the suction port is communicated with the limiting cavity, and one end of the guide limiting sleeve close to the side wall of the limiting cavity extends to one side of the suction port.

7. The flowmeter washing device as claimed in claim 5, wherein a sealing portion is provided at an end of the guide limiting sleeve fixed to the bottom of the overflow preventing barrel, the sealing portion extends towards the vent, and when the buoyancy member blocks the vent, the surface of the buoyancy member is attached to the end surface of the sealing portion close to the vent.

8. The flowmeter flushing device according to any one of claims 1 to 7, further comprising a blocking unit, wherein the surface of the water storage tank is further provided with an air inlet, and the blocking unit is used for blocking the air inlet when the water storage cavity is vacuumized by the vacuumizing device and opening the air inlet when the flushing unit is used for flushing flow timing.

9. The flowmeter flushing device of claim 8, wherein the blocking unit comprises a driver, a fixing frame and a blocking disc, the fixing frame is fixed on the water storage tank and located on one side of the air inlet, the driver is fixed on the blocking disc, a driving end of the driver extends towards the direction of the air inlet, the blocking disc is fixed on a driving end of the driver, and the driver is used for driving the blocking disc to block the air inlet when the water storage cavity is vacuumized by the vacuumizing device and driving the blocking disc to open the air inlet when the flushing unit is used for flushing flow timing.

10. The flowmeter flushing device according to any one of claims 1 to 7, wherein a secondary water tank is arranged on the water inlet pipe, a secondary water cavity is arranged inside the secondary water tank, the secondary water cavity is communicated with the water inlet pipe, and the secondary water cavity is used for storing part of the fresh water introduced into the water storage cavity by the water inlet pipe.