Automatic water injection control method and system for water meter

Abstract

The invention discloses an automatic water injection control method and system for a water meter, and the system comprises a to-be-injected water tank which is used for placing a to-be-injected water meter; a processor module; the processor module controls start and stop of the vacuumizing module, the vacuumizing module is connected with a tank to be injected with water through a vacuum pump extraction valve, and the processor module controls the vacuum pump extraction valve to be opened so as to vacuumize the tank to be injected with water; the water injection module is in circuit connection with the processor module, the processor module controls the water injection module to start and stop, the water injection module is connected with a tank to be injected with water through a micro water inlet valve, and when the tank to be injected with water is in a negative pressure state, the processor module controls the micro water inlet valve to be opened to inject water into the tank to be injected with water; the pressure relief module is in circuit connection with the processor module, the processor module controls starting and stopping of the pressure relief module, the pressure relief module is connected with the to-be-injected water tank through the air inlet valve, and when water injection of the water injection module is completed, the processor module controls the air inlet valve to be opened so as to relieve pressure of the to-be-injected water tank.

Description

Technical Field

[0001] The present application relates to the field of instrument processing technology, and in particular to a water meter automatic water filling control method and system. Background Art

[0002] At present, with the application of water meters such as wet water meters, in the process of processing wet water meters such as wet water meters, taking wet water meters as an example, in order to avoid fogging of the wet water meter dial glass affecting the reading, the water meter dial needs to be filled with water before leaving the factory to remove the air from the water meter dial.

[0003] In the related art, the water filling operation of the water meter is usually carried out manually. Specifically, the water filling process of the water meter often requires multiple steps to be implemented, that is, the operations of punching, filling, and pressure relief of the water meter. There is a lack of linkage between the steps in the processing process, and each step needs to be completed manually by the operator. Therefore, there are the following defects: the level of intelligence in the water meter filling process is low, so the water meter filling efficiency is difficult to improve. At the same time, the water meter filling process of each batch manually filled with water by the operator is not stable enough, and the consistency of the water meter filling effect between different batches is poor. Summary of the Invention

[0004] One of the purposes of this application is to provide a water meter automatic water filling control method to improve the intelligence and automation of the water meter filling process, improve the water meter filling efficiency, simplify the work complexity, reduce the workload of employees, and at the same time ensure the consistency and quality of the water meter filling effect.

[0005] The second purpose of this application is to provide a water meter automatic water filling control system, which can complete the above-mentioned processing method.

[0006] One of the objectives of this application is achieved by the following technical solution:

[0007] Provided is a water meter automatic water filling control system, comprising: a water tank to be filled, wherein the water meter to be filled is placed in the water tank to be filled; a processor module; a vacuum module, wherein the vacuum module is connected to the processor module circuit, wherein the processor module controls the start and stop of the vacuum module, wherein the vacuum module is connected to the water tank to be filled via a vacuum pump exhaust valve, wherein the vacuum pump exhaust valve is controlled to be opened by the processor module to evacuate the water tank to be filled; a water filling module, wherein the water filling module is connected to the processor module circuit, wherein the processor module Control the start and stop of the water injection module, the water injection module is connected to the water tank to be injected through a micro-water inlet valve, when the water tank to be injected is in a negative pressure state, the processor module controls the micro-water inlet valve to open to inject water into the water tank to be injected; the pressure relief module, the pressure relief module is connected to the processor module circuit, the processor module controls the start and stop of the pressure relief module, the pressure relief module is connected to the water tank to be injected through the air intake valve, when the water injection module completes water injection, the processor module controls the air intake valve to open to relieve the pressure in the water tank to be injected.

[0008] As a preferred embodiment, the water meter automatic water filling control system also includes: a return water module, the return water module is connected to the processor module circuit, the return water module is connected to the water filling module, the processor module controls the start and stop of the return water module to achieve water replenishment for the water filling module; an isolation bottle, one end of the isolation bottle is connected to the vacuum module, and the other end of the isolation product is connected to the water tank to be filled, and the isolation bottle is used to isolate the liquid extracted during the vacuuming process of the water tank to be filled.

[0009] As another preferred embodiment, the return water module also includes a first pipeline and a second pipeline, the first pipeline connecting the water tank to be filled and the water injection module through a straight-through drain valve, the straight-through drain valve is connected to the processor module circuit, and the processor module controls the straight-through drain valve to open to complete the return of water in the water tank to be filled to the water injection module; the second pipeline connects the water injection module and the external water source through a solenoid valve, and the second pipeline is also provided with a sensor, the sensor is connected to the processor module circuit, the sensor detects the height of the water level in the water injection module, the processor module is connected to the solenoid valve circuit, and when the sensor detects that the water level in the water injection module is lowered, the processor module controls the solenoid valve to open to complete the replenishment of water to the water injection module by the external water source.

[0010] The second purpose of this application is achieved by the following technical solution:

[0011] A method for controlling automatic water filling of a water meter is provided, which is applicable to the automatic water filling control system of a water meter as described above, and comprises: S100: placing the water meter into a water tank to be filled, and sealing the water tank to be filled; S200: automatically controlling the operation of the vacuum module through a processor module to vacuum the water tank to be filled; S300: automatically starting the water filling module to fill the water tank to be filled; S400: after the water filling is completed, automatically closing the valve port connected to the water tank to be filled to maintain pressure; S500: after the pressure maintenance is completed, automatically starting the pressure relief module to relieve pressure in the water tank to be filled; S600: after the pressure relief is completed, opening the water tank to be filled and taking out the water meter.

[0012] Further preferably, in the above step S200, step S210 is also included: detecting the air pressure value of the vacuum module for vacuuming the water tank to be filled, and judging whether the air pressure value reaches the first preset value T; if it is judged to be yes, the processor module controls to enter the above step S300; if it is judged to be no, the processor module controls to repeat the above steps S200 to S210.

[0013] Preferably, in the above step S300, step S310 is also included: detecting the air pressure change value in the water tank to be filled, and judging whether the air pressure change value reaches the second preset value X; if it is judged to be yes, the processor module controls to enter the above step S400; if it is judged to be no, the processor module controls to repeat the above steps S300 to S310.

[0014] Preferably, after the above step S310, step S320 is further included: automatically controlling the vacuum module to operate so as to perform a second vacuum on the tank to be filled with water, and the time of the second vacuum is maintained at a third preset value Q.

[0015] Preferably, in the above step S400, step S410 is further included: controlling the pressure maintenance of the water tank to be filled, and when the pressure maintenance time reaches a fourth preset value M, automatically controlling and starting the pressure relief module to relieve the pressure of the water tank to be filled.

[0016] Preferably, in the above step S500, step S510 is also included: detecting the air pressure value in the water tank to be filled, and judging whether the air pressure value reaches the fifth preset value N; if it is judged as no, then entering step S511 to continuously open the micro-intake valve to intake air into the water tank to be filled, and repeating the above step S510; if it is judged as yes, then entering step S512 to open the straight-through air intake valve to intake air into the water tank to be filled.

[0017] Preferably, after the above-mentioned step S600, step S700 is also included: real-time monitoring of the water level of the water injection module; judging whether the water level reaches the sixth preset height P; if it is judged as no, entering step S710 to automatically control the solenoid valve to open, and the external water source continues to replenish water to the water tank; if it is judged as yes, entering step S720 to control the solenoid valve to close and stop replenishing water.

[0018] Compared with the existing technology, the beneficial effect of this application is that: through the provided water meter automatic water filling control system, the water meter water filling process is fully automated, the cost of manual participation is reduced, thereby improving the intelligence and automation of the water meter water filling process, and improving the water meter water filling efficiency. At the same time, through the fully automated water meter water filling, the consistency of the water meter water filling effect between different batches is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the water injection equipment;

[0020] Figure 2 This is a structural diagram of the water injection equipment from another perspective;

[0021] Figure 3 It is a structural diagram of the container and the water meter;

[0022] Figure 4 A flow chart of the water meter automatic water filling control method in this application document;

[0023] Figure 5 This is a schematic diagram of the modular control in this application document.

[0024] Figure 6 Schematic diagram of the operating system interface used to run the control method in this application document.

[0025] In the figure: 1. Water filling equipment; 2. Water meter; 10. Bottom plate; 20. Vacuum pump; 30. Water tank to be filled; 40. Water tank; 50. Isolation equipment; 51. First pipeline; 52. Second pipeline; 70. Silencer; 80. Mechanical pressure gauge; 81. Electronic pressure gauge; 82. First sensor; 83. Second sensor; 90. External water source; 91. Leather hose; 100. Isolation bottle exhaust valve; 110. Micro air inlet valve; 120. Straight-through air inlet valve; 130. Container; 131. Opening; 132. Handle; 210. Motor temperature; 220. Vacuum pump temperature; 230. Vacuum pump switch; 240. Vacuum pump exhaust valve; 250. Micro water inlet valve; 260. Straight-through drain valve; 270. Water tank drain valve; 280. Isolation bottle drain valve. DETAILED DESCRIPTION

[0026] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of this application, it should be noted that for directional words, such as the terms "center", "horizontal", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and so on, the directions and positional relationships indicated are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of this application.

[0028] It should be noted that the terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0029] The terms "comprises" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0030] In a preferred embodiment, see Figure 1 Value Figure 5 The present application document provides a water injection device 1 for a water meter 2. The water injection device 1 is suitable for any of the following control methods. The water injection device 1 includes: a bottom plate 10; a vacuum pump 20, one end of the vacuum pump 20 is connected to the bottom plate 10, the vacuum pump 20 is externally connected to a motor, and the motor drives the vacuum pump 20 to operate; a water tank 30 to be injected, the water tank 30 to be injected is connected to the bottom plate 10, the other end of the vacuum pump 20 is connected to the water tank 30 to be injected, and the water tank 30 to be injected is externally connected to a detection component to detect the water tank to be injected. The air pressure value in 30 is used for processing and placing the water meter 2 in the water tank 30 to be filled; the water tank 40, one end of the water tank 40 is connected to the bottom plate 10, and the water tank 40 is provided with a first sensor 82, the first sensor 82 is used to sense the water level change of the water tank 40, and the other end of the water tank 40 is connected to the water tank 30 to be filled; wherein, the gas and or liquid in the water tank 30 to be filled is extracted by the vacuum pump 20, so that the water tank 30 to be filled is in a negative pressure state, so as to drive the water tank 40 to inject liquid into the water tank 30 to be filled.

[0031] The detection components include an electronic barometer 81 and a mechanical barometer 80. The mechanical barometer 80 is externally connected to the outer wall of the water tank 30 to be filled. The mechanical barometer 80 directly displays the air pressure value in the water tank 30 by rotating the pointer, making it easy for the operator to read the value directly. At the same time, one end of the electronic barometer 81 is connected to the water tank 30 to be filled, and the other end of the electronic barometer 81 is connected to the processing system. The reading detected by the electronic barometer 81 is uploaded to the processing system and displayed electronically on the processing system. The air pressure value is uploaded to the processing system so that the subsequent processing system can automatically control operations such as pressure maintenance and pressure release based on the air pressure value.

[0032] Furthermore, the water injection equipment 1 also includes: an isolation device 50, the isolation device 50 is connected to the base plate 10, and the isolation device 50 is clamped between the vacuum pump 20 and the water tank to be injected 30, the isolation device 50 and the vacuum pump 20 are connected through a first pipeline 51, and the isolation device 50 and the water tank to be injected 30 are connected through a second pipeline 52; a silencer 70, the silencer 70 is connected to the second pipeline 52, and the silencer 70 is arranged close to one side of the water tank to be injected 30; wherein, the isolation device 50 is used to isolate and store the liquid in the water tank to be injected 30 that is sucked toward the vacuum pump 20.

[0033] When the vacuum pump 20 is working to evacuate gas, the provision of the silencer 70 can reduce the sonic boom generated when gas is extracted from the water tank 30 to be filled, thereby protecting the operator's safety to a certain extent.

[0034] Furthermore, the water filling equipment 1 also includes: a transport part, which is connected to the motor circuit, and the motor drives the transport part to move; a accommodating part 130, which is loaded with the water meter 2 and is driven by the transport part to be transported to the tank 30 to be filled with water. The accommodating part 130 is provided with an opening 131 around the edge to facilitate the liquid in the water tank 40 to enter the accommodating part 130.

[0035] Among them, the container 130 is preferably a metal basket with holes, which is convenient for placing and accommodating a large number of water meters 2. At the same time, the setting of the opening 131 facilitates the inflow of water during the injection process. The transport part is a fishing hook. The transport part is externally connected to a driving motor. The iron hook hooks the handle 132 of the metal basket, thereby lifting the metal basket and moving it to the water tank 30 to be injected, saving time and effort.

[0036] In a preferred embodiment, see Figures 4 and 5, provides an automatic water filling control method for a water meter 2, comprising: S100: installing the water meter 2 into a water tank to be filled 30, and sealing the water tank to be filled 30; S200: automatically controlling the operation of a vacuuming module through a processor module to vacuum the water tank to be filled 30; S300: after the vacuuming is completed, automatically starting the water filling module to fill the water tank to be filled 30 with water; S400: after the water filling is completed, automatically closing the valve port connected to the water tank to be filled 30 to maintain pressure; S500: after the pressure maintenance is completed, automatically starting the pressure relief module to relieve pressure in the water tank to be filled 30; S600: after the pressure relief is completed, opening the water tank to be filled 30 and taking out the water meter 2.

[0037] The vacuum pump module corresponds to the vacuum pump 20 in the specific product and the vacuum pump exhaust valve 240 connected to the water tank 30 to be filled through the vacuum pump 20. The processor module is used to control the opening and closing of the vacuum pump 20 and the vacuum pump exhaust valve 240. The water injection module corresponds to the water tank 40 and the water inlet valve and drain valve connected to the water tank 40 and the water tank 30 to be filled, wherein the water inlet valve is a micro water inlet valve 250 and the drain valve is a straight-through drain valve 260. The pressure relief module corresponds to the air intake valve controlled by the processor module, and the air intake valve is also divided into a micro air intake valve 110 and a straight-through air intake valve 120.

[0038] Therefore, in the above step S500, step S510 is also included: detecting the air pressure value in the water tank 30 to be injected, and judging whether the air pressure value reaches the fifth preset value N; if it is judged as no, then entering step S511 to continuously open the micro-intake valve 110 to inject air into the water tank 30 to be injected, and repeating the above step S510; if it is judged as yes, then entering step S512 to open the direct-through air intake valve 120 to inject air into the water tank 30 to be injected.

[0039] Similarly, in the above step S200, step S210 is also included: detecting the air pressure value of the vacuum module for vacuuming the water tank 30 to be injected, and judging whether the air pressure value reaches the first preset value T; if it is judged to be yes, the processor module controls to enter the above step S300; if it is judged to be no, the processor module controls to repeat the above steps S200 to S210.

[0040] In the above step S300, step S310 is also included: detecting the air pressure change value in the water tank 30 to be filled, and judging whether the air pressure change value reaches the second preset value X; if it is judged to be yes, the processor module controls to enter the above step S400; if it is judged to be no, the processor module controls to repeat the above steps S300 to S310.

[0041] After the above step S310, the process further includes step S320: automatically controlling the vacuum pumping module to perform secondary vacuum pumping on the water tank 30, wherein the time of the secondary vacuum pumping is maintained at a third preset value Q.

[0042] In the above step S400, it further includes step S410: controlling the pressure maintenance of the water injection tank 30 to be filled. When the pressure maintenance time reaches the fourth preset value M, automatically control the start of the pressure relief module to relieve the pressure of the water injection tank 30 to be filled.

[0043] Preferably, after the above step S600, it further includes step S700: monitoring the water level height of the water injection module in real time; determining whether the water level height reaches the sixth preset height P; if the determination is no, then enter step S710 to automatically control the solenoid valve to open, and the external water source 90 continuously replenishes water to the water tank 40; if the determination is yes, then enter step S720 to control the solenoid valve to close and stop the water replenishment.

[0044] The first preset value T, the second preset value X, the third preset value Q, the fourth preset value M, the fifth preset value N, and the sixth preset height P are all specific parameters that can be set by the operator according to the actual working conditions, and the specific parameters set under different usage conditions are different.

[0045] Among them, preferably, referring to Figure 6 , the first preset value T corresponds to the blind pumping negative pressure. The range of the first preset value T is -0.1 < T < -0.09. Preferably, in this embodiment, T is selected as -0.095 Map. The following air pressure value units are all Map, and the time unit is seconds. The second preset value X corresponds to the change value of the air pressure in the water injection tank 30 to be filled after the first vacuum pumping. The range of the second preset value X is -0.09 < X < -0.08. Preferably, X is taken as -0.085 Map. The third preset value Q corresponds to the blind pumping time. The range of the third preset value Q is 10 < Q < 20. Preferably, in this embodiment, the third preset value Q is selected as 12 seconds, and the vacuum pump 20 maintains for 12 seconds during the second vacuum pumping. At the same time, the fourth preset value M corresponds to the pressure maintenance time. The range of the fourth preset value M is 15 < T < 30. Preferably, in this embodiment, the fourth preset value M is selected as 20 seconds. The fifth preset value N corresponds to the upper limit value of the opening of the direct intake valve 120. The range of the fifth preset value N is -0.005 < N < -0.003. Preferably, the fifth preset value N is taken as -0.004. When the air pressure value in the water injection tank 30 reaches -0.004 Map, the direct intake valve 120 is opened for air intake.

[0046] It should be noted that the system interface also includes the setting of the oil change times. That is, after the equipment runs the above number of times, the processor module can control the vacuum pump 20 to automatically change the oil. The oil change times are preferably set to 250 times. That is, the water meter 2 automatic water injection system automatically changes the oil after running 250 times, thereby reducing the operation burden of the operator and improving the efficiency.

[0047] The protection temperature value is also set in the system interface. Preferably, the protection temperature value is set at 120 degrees Celsius. When the motor temperature 210 and the vacuum pump temperature 220 reach 120 degrees Celsius, the processor module controls the power-off to avoid high-temperature damage to the motor and the vacuum pump 20. The air leakage protection time is also set in the system interface. The air leakage protection time is preferably set to 90 seconds. In the actual operation process of the vacuum pump 20, the general running time is 30 to 40 seconds, and the air pressure value in the water injection tank 30 can be extracted to the set range. If the running extraction time of the vacuum pump 20 reaches 90 seconds and the air pressure value in the water injection tank 30 still fails to reach the set value at this time, it is determined that the equipment system has air leakage and the air extraction is stopped. The delay in the system interface is preferably set to 6 seconds, that is, after the vacuum extraction is completed, the isolation bottle water discharge valve is controlled to open for 6 seconds to drain the isolation bottle. The set number of water discharge times is preferably set to 6 times.

[0048] Further, in the water return stage, the range of the sixth preset height P is 0 < X < 40, in centimeters. The operation inspection and water addition in the system interface means that a water level detection is performed once after the system runs a certain number of times. Preferably, the number of times of operation inspection and water addition is set to 4 times. At the same time, the water addition after a certain number of runs means that after the system runs a certain number of times, the processor module directly controls the water return module to add water to the water tank 40 through the external water source 90. The water addition after a certain number of runs is preferably set to 2 times, and the timed water addition is preferably set to 15 seconds, that is, water is added for 15 seconds during the water addition after a certain number of runs. The water return time is the water replenishment operation for the water tank 40 after the operation inspection and water addition. The water return time is preferably 140 seconds, and the water addition delay is preferably 4 seconds.

[0049] Among them, the control method in this embodiment controls the water meter 2 to complete the liquid injection process in sequence by writing an algorithm program for the control system. Specifically, referring to Figures 1 to 2 the product equipment as an example, specifically combined with the product in a specific embodiment, the liquid injection process is to inject water into the dial of the water meter 2. The main water tank is provided with a sealing cover for easy opening and closing. During the control process, synchronous liquid injection processing can be realized for multiple water meters 2, ensuring good consistency between different water meters 2. The water injection tank 30 is used to place the water meters 2 to be processed. The operator only needs to put the water meter 2 into the water injection tank 30 and start the switch, and the control system can automatically complete the subsequent water injection operation.

[0050] Specifically, when the control method is activated for the first time, the water tank 30 to be filled is in a dry state, and a valve assembly is provided between the vacuum pump 20 and the water tank 30 to be filled. When the valve assembly is opened, the air in the water tank 30 to be filled is extracted by the vacuum pump 20. The air is gradually extracted to make the container in a negative pressure state. Then the above-mentioned valve assembly is closed, and the valve provided between the water tank 30 to be filled and the water tank 40 is opened to allow water to enter the water tank 30 to be filled. Since the water tank 30 to be filled and the water meter 2 are both in a negative pressure state at this time, the water can directly enter the water meter 2 to complete the water filling operation.

[0051] After the water filling is completed, a certain amount of air is contained in the water and in the process of water filling through the pipeline, resulting in a certain amount of bubbles in the water meter 2. Therefore, at this time, step S4 is used to further extract the gas in the water tank 30 to reduce the generation of bubbles in the water meter 2 and ensure the accuracy of water filling in the water meter 2. It should also be noted that during the above-mentioned further gas extraction process, a specific blind extraction time is preferably set according to specific working conditions to ensure that the water filling condition in the water meter 2 reaches the optimal state. In this embodiment, the blind extraction time is preferably set to 12 seconds.

[0052] At the same time, in order to further ensure the integrity of the water filling in the water meter 2 and reduce the generation of bubbles in the water meter 2, after the second air pumping, various valve ports connected to the water tank 30 to be filled are closed, including but not limited to the above-mentioned valve port assembly and the valve port set between the water tank 30 to be filled and the water tank 40, so as to maintain the pressure in the water tank 30 to be filled.

[0053] After the pressure maintenance is completed, the air inlet valve assembly is opened to release the pressure in the water tank 30 to facilitate taking out the processed water meter 2.

[0054] As a preferred embodiment, controlling the vacuum pump 20 to operate to extract the gas in the water tank 30 to be injected includes: controlling the vacuum pump 20 to operate to extract the gas and / or liquid in the water tank 30 to be injected into the isolation device 50; extracting the gas in the isolation device 50 through the vacuum pump 20 so that the water tank 30 to be injected is in a negative pressure state.

[0055] Among them, an isolation device 50 is added between the water tank 30 to be filled and the vacuum pump 20. The isolation device 50 is specifically an isolation bottle. After the above control method is carried out for one cycle, when the second batch of water meters 2 are injected with liquid, the water tank 30 to be filled is not in a dry state, but in a gas-liquid mixed state. Therefore, the valve mouth assembly provided between the vacuum pump 20 and the water tank 30 to be filled includes a vacuum pump exhaust valve 240 provided between the vacuum pump 20 and the isolation bottle, and an isolation bottle exhaust valve 100 provided between the isolation bottle and the water tank 30 to be filled. When the vacuum pump 20 is started, the gas-liquid mixture in the water tank 30 to be filled is extracted into the isolation product through the vacuum pump 20. The liquid is isolated to a certain extent by the isolation product, and what is extracted by the vacuum pump 20 is mostly gas, which reduces the extraction of liquid, improves the service life of the vacuum pump 20, and reduces the need for oil change of the vacuum pump 20.

[0056] As another preferred embodiment, controlling the water tank 40 to operate to inject liquid into the water tank to be injected 30 includes: controlling the water tank 40 to inject liquid into the water tank to be injected 30 at a first speed through the micro-inlet valve 250.

[0057] The micro-inlet valve 250 controls the speed of water flowing from the water tank 40 into the water tank 30 to be filled to a certain extent, preventing the water from being ejected from the water tank 30 in a fountain-like manner. If the water inlet speed is too fast and the water inflow per unit time is too large, it will cause excessive bubbles in the water meter 2. It also prevents bubbles from entering the pump through the pipeline. Excessive air bubbles will require frequent oil changes in the pump, which is very costly. Therefore, the water inflow is controlled, and the water inflow speed is controlled so that the water level in the water tank 30 rises slowly. The water tank 40 is specifically a square water tank 40, and the water level in the tank 40 slowly drops.

[0058] Further preferably, controlling the pressure maintaining operation in the water tank to be filled 30 includes: setting the pressure maintaining time of the water tank to be filled 30 to a first duration; and controlling the valve connected to the water tank to be filled 30 to be closed during the first duration.

[0059] The first duration can be set by the operator under specific working conditions. Preferably, the pressure holding time in this embodiment is determined by the operator through multiple actual attempts to find the optimal time to be 10 seconds to 20 seconds.

[0060] Furthermore, the pressure relief operation is controlled in the water tank to be injected 30, including: setting a first upper limit value for the air pressure value in the water tank to be injected 30; controlling the opening of the micro-inlet valve 110 to inject air into the water tank to be injected 30, and judging in real time whether the air pressure value in the water tank to be injected 30 reaches the first upper limit value; if it is judged as no, continuously opening the micro-inlet valve 110 to inject air into the water tank to be injected 30; if it is judged as yes, opening the straight-through air intake valve 120 to inject air into the water tank to be injected 30.

[0061] Specifically, the first upper limit can be set based on actual operating conditions. Therefore, in this embodiment, the first upper limit is preferably -0.004 MPa. The micro-inlet valve 110 controls the slow entry of a small amount of external air into the water tank 30, causing the air pressure in the water tank 30 to rise slowly, preventing sudden pressure changes that could cause water bubbles to form within the water meter 2. The direct-through air inlet valve 120 controls the rapid entry of external air into the water tank 30, raising the air pressure within the processing container to the same level as the outside air pressure, facilitating the removal of the water meter 2. This pressure relief process lasts for 3 to 4 minutes.

[0062] Furthermore, the control method also includes: after the liquid injection process is completed, controlling the remaining liquid in the water tank 30 to be injected to flow back to the water tank 40; the water tank 40 is connected to an external water source 90, and the external water source 90 is manually or automatically controlled by the system to replenish the liquid in the water tank 40.

[0063] Furthermore, the system automatically controls the external water source 90 to replenish liquid in the water tank 40, including: real-time monitoring of the water level of the water tank 40; determining whether the water level reaches a first preset height; if not, controlling the external water source 90 to continue injecting liquid into the water tank 40; if yes, controlling the external water source 90 to stop injecting liquid into the water tank 40.

[0064] Specifically, the control method in this embodiment also includes replenishing the water in the water tank 40. After the water filling operation of the water meter 2 is completed, since the water injected into the water meter 2 accounts for only a small part, the remaining water in the water tank 30 to be filled is returned to the water tank 40 through the straight-through drain valve 260 provided between the water tank 30 to be filled and the water tank 40, so as to facilitate the filling of the second batch of water meters 2 to be processed, thereby reducing water waste. At the same time, since the water meter 2 needs to consume a portion of water to be filled, the water returned to the water tank 40 after processing through the water tank 30 cannot continuously complete multiple batches of water filling operations. Therefore, the water tank 40 is connected to an external water source 90. The external water source 90 is a tap water pipe mouth, which is connected to the water tank 40 through a leather hose 91. The external water source 90 is also connected to a solenoid valve, which controls the start and stop of the water replenishment. The other end of the solenoid valve is externally connected to a first sensor 82 and a second sensor 83. The first sensor 82 is a high liquid level sensor. In a practical example, In the application scenario, when there are more water meters 2 entering the water tank 30 in each batch, and the container 130, that is, the metal basket, is used as a reference, when the full basket, that is, the container 130 is filled with water meters 2 for water filling, the first sensing component 82 is activated. The first sensing component 82 senses that the water level in the water tank 40 has dropped, and at this time, the solenoid valve is opened to inject water into the water tank 40 through the leather hose 91. When the water level rises to the same level as the first sensing component 82, the first sensing component 82 sends an induction signal to control the solenoid valve to close, thereby completing the replenishment of water in the water tank 40.

[0065] Similarly, taking the container 130 as a reference, when half the basket, that is, when the container 130 is equipped with half or less of the total volume of water meters 2, the second sensor 83 is activated. The working principles of the first sensor 82 and the second sensor 83 are the same and will not be repeated here.

[0066] Specifically, see Figure 5 , provides a schematic diagram of the processing system operation interface, that is, the control method of the precision instrument processing process in this application is the result of the system processing in conjunction with the instructions issued by the operator. The processing system can be divided into automatic mode and manual mode. The automatic mode only requires the operator to click the start button in the system interface. Under special circumstances, the operator can also control the operation steps of the system through the manual mode, which is flexible and diverse. In manual mode, the vacuum pump switch 230 can be directly pressed to start and stop the vacuum pump 20. The water tank 40, that is, the water replenishment step in the water tank 40, can also be manually controlled to perform manual water adding operations. At the same time, the operation interface displays the motor temperature 210 and the vacuum pump temperature 220, which is convenient for the operator to grasp the usage of the components in the system in real time and avoid overheating of the motor or vacuum pump 20.

[0067] Preferably, during the operation of the vacuum pump 20, the vacuum pump exhaust valve 240 is opened, the isolation bottle exhaust valve 100 is opened, the isolation bottle drain valve 280 is closed, the micro air inlet valve 110 is closed, the direct air inlet valve 120 is closed, the micro water inlet valve 250 is closed, and the direct drain valve 260 is closed. When the air extraction is completed, only the micro water inlet valve 250 is opened, and the remaining valves are closed. After the water injection is completed, the micro water inlet valve 250 is closed. At this time, only the vacuum pump exhaust valve 240 and the isolation bottle exhaust valve 100 are opened to perform a second air extraction on the water tank 30 to be injected. After the second air extraction is completed, the water tank 30 to be injected enters the pressure holding stage. At this time, all valves are closed, and the pressure holding lasts for 10-20 seconds. After the pressure holding is completed, the micro air inlet valve 110 is opened first during the pressure relief process, and the medium pressure of the water tank 30 to be injected is reduced. After the force value reaches the upper limit, the micro-inlet valve 110 is closed and the direct air inlet valve 120 is opened to let air in. After the air intake is completed, the isolation bottle drain valve 280 is opened to drain water, and the direct drain valve 260 is opened to return the remaining water in the water tank 30 to be filled to the water tank 40, and the water replenishment operation is performed. If a special situation occurs and the water level line in the water tank 40 is too high, the water tank drain valve 270 can be opened to drain the water tank 40 so that the water level line in the water tank 40 returns to a normal position.

[0068] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A water meter automatic water injection control system, characterized in that: include: A water tank to be filled, wherein the water meter to be filled is placed in the water tank; Processor module; A vacuum pumping module, wherein the vacuum pumping module is connected to the processor module circuit, the processor module controls the start and stop of the vacuum pumping module, the vacuum pumping module is connected to the water tank to be filled via a vacuum pump exhaust valve, and the vacuum pump exhaust valve is controlled by the processor module to open to vacuumize the water tank to be filled; A water injection module, the water injection module is connected to the processor module circuit, the processor module controls the start and stop of the water injection module, the water injection module is connected to the water tank to be injected through a micro-water inlet valve, and when the water tank to be injected is in a negative pressure state, the processor module controls the micro-water inlet valve to open to inject water into the water tank to be injected; The pressure relief module is connected to the processor module circuit, the processor module controls the start and stop of the pressure relief module, the pressure relief module is connected to the water tank to be filled through the air intake valve, and when the water injection module completes water injection, the processor module controls the air intake valve to open to relieve the pressure in the water tank to be filled.

2. The water meter automatic water filling control system according to claim 1, characterized in that: Also includes: A water return module, wherein the water return module is connected to the processor module circuit, the water return module is connected to the water injection module, and the processor module controls the start and stop of the water return module to realize water replenishment for the water injection module; An isolation bottle, one end of which is connected to the vacuum pumping module, and the other end of which is connected to the water tank to be filled. The isolation bottle is used to isolate the liquid extracted during the vacuum pumping process of the water tank to be filled.

3. The water meter automatic water filling control system according to claim 2, characterized in that: The water return module further includes a first pipeline and a second pipeline, wherein the first pipeline connects the water tank to be filled and the water injection module via a straight-through drain valve, the straight-through drain valve is connected to the circuit of the processor module, and the processor module controls the straight-through drain valve to open so as to complete the return of water in the water tank to be filled to the water injection module; The second pipeline connects the water injection module with an external water source through a solenoid valve. The second pipeline is also provided with a sensor, and the sensor is connected to the processor module circuit. The sensor detects the water level in the water injection module. The processor module is connected to the solenoid valve circuit. When the sensor detects that the water level in the water injection module is lowered, the processor module controls the solenoid valve to open to complete the replenishment of the water injection module by the external water source.

4. A water meter automatic water filling control method, characterized in that: The water meter automatic water filling control method is applicable to the water meter automatic water filling control system as described in any one of 1-3 above, and the water meter automatic water filling control method includes: S100: placing the water meter into the water tank to be filled, and sealing the water tank to be filled; S200: Automatically controlling the vacuum module to operate through the processor module to vacuum the water tank to be filled; S300: After the vacuuming is completed, the water injection module is automatically started to inject water into the water tank to be injected; S400: After the water injection is completed, the valve port connected to the water tank to be injected is automatically closed to maintain the pressure; S500: After the pressure maintenance is completed, the pressure relief module is automatically started to relieve the pressure of the water tank to be filled; S600: After the pressure relief is completed, the water tank to be filled is opened and the water meter is taken out.

5. The water meter automatic water filling control method according to claim 4, characterized in that: In the above step S200, step S210 is also included: detecting the air pressure value of the vacuum module for vacuuming the water tank to be filled, and determining whether the air pressure value reaches a first preset value T; If the judgment is yes, the processor module controls to enter the above step S300; If the judgment is no, the processor module controls to repeat the above steps S200 to S210.

6. The water meter automatic water filling control method according to claim 4, characterized in that: In the above step S300, step S310 is also included: detecting the air pressure change value in the water tank to be filled, and determining whether the air pressure change value reaches a second preset value X; If the judgment is yes, the processor module controls to enter the above step S400; If the judgment is no, the processor module controls to repeat the above steps S300 to S310.

7. The water meter automatic water filling control method according to claim 5, characterized in that: After the above step S310, the method further includes step S320: automatically controlling the vacuum pumping module to operate so as to perform secondary vacuum pumping on the tank to be filled with water, and the time of the secondary vacuum pumping is maintained at a third preset value Q.

8. The water meter automatic water filling control method according to claim 4, characterized in that: In the above step S400, step S410 is also included: controlling the pressure of the water tank to be filled to be maintained, and when the pressure maintaining time reaches a fourth preset value M, automatically controlling the start of the pressure relief module to relieve the pressure of the water tank to be filled.

9. The water meter automatic water filling control method according to claim 4, characterized in that: In the above step S500, step S510 is also included: detecting the air pressure value in the water tank to be filled, and determining whether the air pressure value reaches a fifth preset value N; If the answer is no, the micro-intake valve is continuously opened to inlet air into the water tank to be filled, and the above step S510 is repeated; If the answer is yes, the direct air inlet valve is opened to allow air to enter the water tank to be filled.

10. The water meter automatic water filling control method according to any one of claims 4 to 9, characterized in that: After the above step S600, the method further includes step S700: real-time monitoring of the water level of the water injection module; Determining whether the water level has reached a sixth preset height P; If the judgment is no, the solenoid valve is automatically controlled to open, and the external water source continues to replenish water to the water tank; If the judgment is yes, the solenoid valve is controlled to close and the water replenishment is stopped.

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