Water meter air drying device

Abstract

The utility model discloses a water meter air-drying device which comprises an air-drying base table and a controller, a water meter placing base is arranged on the top face of the air-drying base table, a first positioning air cylinder and a second positioning air cylinder are fixedly arranged on the top face of the air-drying base table, and the output rod end of the first positioning air cylinder is fixedly connected with a first air supply connector. A first air inlet pipe is connected to the side wall of the first air supply connector, a second air supply connector is fixedly connected to the output rod end of the second positioning air cylinder, and a second air inlet pipe is connected to the side wall of the second air supply connector. An air pump and a two-position five-way valve are fixedly installed on the bottom face of the air drying base table, a P input port and a P input port of the two-position five-way valve are connected with the output end of the air pump at the same time, an A output port of the two-position five-way valve is connected with the first air inlet pipe, a B output port of the two-position five-way valve is connected with the second air inlet pipe, and a T common output port of the two-position five-way valve is connected with an exhaust pipe. According to the utility model, the inside of the water meter can be quickly air-dried, the dial pointer of the water meter can be zeroed, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water meter performance detection equipment, in particular to a water meter air drying device. Background Art

[0002] NB-loT smart remote water meter (such as a modular NB-loT remote water meter currently produced and sold by the applicant, with publication number CN115342878A) is composed of an ordinary mechanical water meter plus an electronic data acquisition and transmission module. The electronic module completes signal acquisition, data processing, storage and uploads the data to a repeater or a handheld meter reader through a communication line. It is a new concept of smart water meter that integrates multiple functions such as automatic water supply, automatic metering, automatic charging, automatic control, display alarm, etc.

[0003] The above-mentioned NB-loT smart remote water meter automatically obtains the water meter count by sensing the rotation of the pointer in the base meter through the counting sensor module. Whether the pointer rotation measurement is accurate directly determines the accuracy of the smart water meter count. Therefore, it is necessary to perform counting performance testing on the assembled smart water meter, that is, water flow testing. However, there is often a small amount of water remaining in the water meter after the water flow test, which is inconvenient to directly pack and store or pack into boxes. It often needs to be left to stand for a period of time and dry the water inside the water meter by natural drying. This spontaneous combustion drying method consumes a lot of manpower during the transportation, placement and collection process, and the natural drying method is less efficient, so a larger area of ​​drying site and better ventilation conditions are required to ensure good drying conditions. Utility Model Content

[0004] The utility model proposes a water meter air-drying device, which adopts ventilation to air-dry the water meter, which is convenient for the storage and packaging of the water meter. The supply and on-off of the gas used for air-drying are realized by positioning the cylinder-driven joint, so as to reduce labor costs and labor intensity and improve the operating efficiency of water meter air-drying. The internal air-drying of the water meter is realized by reciprocatingly switching ventilation at the two ports of the water meter, and the zeroing operation of the water meter dial pointer can be realized at the same time. Through image processing and analysis and comparison technical means based on visual recognition, the indication of the water meter dial pointer can be obtained quickly and accurately, so as to accurately judge whether the meter needle reaches the preset adjustment position, so as to adjust the accuracy and timeliness of the result.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is:

[0006] A water meter air-drying device comprises an air-drying base, a controller fixedly arranged on one side of the top surface of the air-drying base, a water meter placement seat being arranged on the top surface of the air-drying base, a water meter to be air-dried being embedded in the water meter placement seat, a first positioning cylinder and a second positioning cylinder respectively fixedly arranged on the top surface of the air-drying base and located on opposite sides of the water meter placement seat, a first air supply joint being fixedly connected to an output rod end of the first positioning cylinder, a first air supply joint being connected to a first air inlet pipe on a side wall of the first air supply joint, a second air supply joint being fixedly connected to an output rod end of the second positioning cylinder, a second air supply joint being arranged opposite to the first air supply joint, a second air inlet pipe being connected to a side wall of the second air supply joint, and air outlets of the first air supply joint and the second air supply joint being respectively connected to or separated from two ports of the water meter to be detected;

[0007] An air pump and a two-position five-way valve are fixedly installed on the bottom surface of the air-drying base, the P input port and the P input port of the two-position five-way valve are connected to the output end of the air pump at the same time, the A output port of the two-position five-way valve is connected to the first air inlet pipe, the B output port is connected to the second air inlet pipe, and the T common output port is connected to the exhaust pipe;

[0008] When the two-position five-way valve is in the left position, the P input port is closed, the P input port is connected to the B output port, and the A output port is connected to the T common output port; when the two-position five-way valve is in the right position, the P input port is closed, the P input port is connected to the A output port, and the B output port is connected to the T common output port.

[0009] Furthermore, a camera assembly located on one side of the water meter placement seat is fixedly installed on the top surface of the air-drying base, and the camera end of the camera assembly is aligned with the top surface of the dial of the water meter to be inspected.

[0010] Furthermore, the camera assembly includes a horizontal slide rail, a horizontal positioning block slidably connected to the horizontal slide rail, a vertical slide rail fixedly arranged on the top surface of the horizontal positioning block, a first vertical positioning block and a second vertical positioning block respectively slidably connected to the vertical slide rail, a CCD camera connected to the controller is fixedly connected to the side of the first vertical positioning block, a light source box located directly below the CCD camera is fixedly connected to the side of the second vertical positioning block, and a condenser is fixedly arranged at the bottom of the light source box.

[0011] Furthermore, a camera bracket is fixedly arranged on the top surface of the air-drying base, and the horizontal slide rail is fixedly installed on the top of the camera bracket.

[0012] Furthermore, a rodless cylinder located between the first positioning cylinder and the second positioning cylinder is fixedly provided on the top surface of the air-drying base, and the water meter placement seat is fixedly installed on the top of the power output end of the rodless cylinder.

[0013] Furthermore, auxiliary support platforms distributed on both sides of the rodless cylinder are fixedly arranged on the top surface of the air-drying base, and the bottom surface of the water meter placement seat is slidably fitted with the top surface of the auxiliary support platforms.

[0014] Furthermore, a display screen connected to a controller is fixedly disposed on one side of the top surface of the air-drying base.

[0015] Furthermore, a protective cover is fixedly provided on the top surface of the air-drying base, and the display screen is installed in the protective cover.

[0016] Furthermore, air pipe grooves are respectively provided on both sides of the top surface of the air-drying base, and the first air inlet pipe and the second air inlet pipe are respectively movably arranged in the air pipe grooves.

[0017] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0018] 1. In the detection device of the utility model, ventilation is used to air-dry the water meter after cleaning or detection, which is convenient for the storage and packaging of the water meter. The supply and disconnection of the gas used for air-drying are realized by positioning the joint driven by a cylinder. The docking process between the joint and the water meter port is fast, accurate and reliable. The structural design is simple and the degree of automation is high, which effectively reduces the labor cost and labor intensity, and greatly improves the operating efficiency of air-drying the water meter.

[0019] 2. The internal air drying of the water meter can be achieved by reciprocatingly switching ventilation at the two ports of the water meter, and the water meter dial pointer can be reset to zero at the same time. The real-time collection of the dial reading during the air drying process of the water meter can be achieved through the camera component. Through image processing and analysis and comparison technical means based on visual recognition, the reading of the water meter dial pointer can be obtained quickly and accurately, so as to accurately judge whether the pointer has reached the preset adjustment position, thereby improving the accuracy and timeliness of the adjustment result. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the three-dimensional structural schematic diagrams of the utility model;

[0021] Figure 2 This is the second schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the utility model in working state;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the first air supply positioning assembly of the utility model;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the water meter clamping and positioning assembly of the utility model;

[0025] Figure 6 It is a three-dimensional structural schematic diagram of the air supply assembly of the utility model;

[0026] Figure 7 It is a gas circuit diagram of the two-position five-way valve in the left working position;

[0027] Figure 8 It is a gas circuit diagram of the two-position five-way valve in the right working position;

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure of the camera assembly.

[0029] In the figure: 1 air drying base, 2 controller, 3 display screen, 4 rodless cylinder, 5 water meter placement seat, 6 first positioning cylinder, 7 first air supply connector, 8 first air inlet pipe, 9 camera assembly, 901 horizontal slide rail, 902 horizontal positioning block, 903 vertical slide rail, 904 first vertical positioning block, 905 second vertical positioning block, 906 CCD camera, 907 light source box, 908 condenser, 10 second positioning cylinder, 11 second air supply connector, 12 second air supply pipe, 13 air pump, 14 two-position five-way valve, 15 exhaust pipe, 16 camera bracket, 17 auxiliary support platform, 18 protective cover, 19 first cylinder bracket, 20 second cylinder bracket, 100 water meter. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0033] See also Figures 1 to 8, a water meter air-drying device, comprising an air-drying base 1, and a controller 2 fixedly arranged on one side of the top surface of the air-drying base 1. A water meter clamping and positioning component, a first air supply positioning component located on the right side of the water meter clamping and positioning component, a second air supply positioning component located on the left side of the water meter clamping and positioning component, and an air supply component arranged at the bottom of the air-drying base 1 are respectively arranged on the top surface of the air-drying base 1. In this embodiment, since the internal air-drying of the water meter is achieved by reciprocatingly switching ventilation at the two ports of the water meter, the zeroing operation of the water meter dial pointer can be achieved at the same time, and the real-time acquisition of the dial reading of the water meter during the air-drying process can be achieved through the camera component. Through the image processing and analysis and comparison technical means based on visual recognition, the reading of the water meter dial pointer can be quickly and accurately obtained, so as to accurately judge whether the pointer reaches the preset adjustment position. Therefore, a display screen 3 connected to the controller 2 is fixedly arranged on one side of the top surface of the air-drying base 1, which is used to display the coding mark of the current water meter and the image information of the dial. At the same time, a protective cover 18 is fixedly provided on the top surface of the air-drying base 1, and the display screen 3 is installed in the protective cover 18, so as to fix and protect the display screen 3. The controller 2 and the display screen 3 adopt the functional modules of the existing visual inspection equipment, and are equipped with image information processing software based on visual recognition, and can be used for logical control of the execution sequence of each electrical component in the detection device. The air pressure pump system used by each starting element of the detection device 1 realizes the corresponding air pressure supply. The above are all existing technologies and will not be repeated here.

[0034] The specific structure of the water meter clamping and positioning assembly is as follows: Figure 5As shown. Specifically, a water meter placement seat 5 is provided on the top surface of the air-drying base 1, and the water meter 100 to be air-dried is embedded in the water meter placement seat 5. The top surface of the water meter placement seat 5 is provided with an embedding groove that matches the outer contour of the water meter 100. The water meter 100 can be quickly and accurately placed in the embedding groove with the dial facing upward, and the freedom of movement in all directions in the horizontal plane is restricted, so that the water meter 100 can always keep the dial facing upward during the air-drying process, and the axis position of the ports at both ends remains unchanged. In order to facilitate the placement operation of the water meter in the water meter placement seat 5, a rodless cylinder 4 located between the first positioning cylinder 6 and the second positioning cylinder 10 is fixedly provided on the top surface of the air-drying base 1, and the water meter placement seat 5 is fixedly installed on the top of the power output end of the rodless cylinder 4. In order to realize the real-time acquisition of the dial image of the water meter 100, a camera assembly 9 located on one side of the water meter placement seat 5 is fixedly installed on the top surface of the air-drying base 1, and the camera assembly 9 is aligned with the top surface of the dial of the water meter 100 to be detected. When the rodless cylinder 4 works in reverse, the water meter placement seat 5 is located at the loading and unloading stations to complete the placement and removal of the water meter 100 in the water meter placement seat 5; when the rodless cylinder 4 works in the forward direction, the water meter placement seat 5 is located in the air-drying position. At this time, the dial of the water meter 100 located in the water meter placement seat 5 is just below the image collection end of the camera assembly 9. The camera assembly 9 can collect the dial image of the water meter 100 in real time, and then transmit it to the controller 2.

[0035] Preferably, auxiliary support platforms 17 distributed on both sides of the rodless cylinder 4 are fixedly provided on the top surface of the air-drying base 1, and the bottom surface of the water meter placement seat 5 is slidably fitted with the top surface of the auxiliary support platforms 17. The water meter placement seat 5 is supported by the two auxiliary support platforms 17, so that the water meter placement seat 5 can maintain a stable state during the movement and detection process.

[0036] like Fig. 9As shown, the camera assembly 9 includes a horizontal slide rail 901, a horizontal positioning block 902 slidably connected to the horizontal slide rail 901, a vertical slide rail 903 fixedly arranged on the top surface of the horizontal positioning block 902, a first vertical positioning block 904 and a second vertical positioning block 905 slidably connected to the vertical slide rail 903, a CCD camera 906 connected to the controller 2 is fixedly connected to the side of the first vertical positioning block 904, a light source box 907 located directly below the CCD camera 906 is fixedly connected to the side of the second vertical positioning block 905, and a condenser 908 is fixedly arranged at the bottom of the light source box 907. The image-taking end of the CCD camera 906 is pointed vertically downward, and the light source box 907 is located directly below the CCD camera 906 and directly above the dial of the water meter 100, and can provide lighting to the water meter dial at the bottom to ensure the brightness of the image. The condenser 908 made of non-transparent material can avoid light dispersion and interference of external ambient light on the light in the image-taking area, so as to ensure uniform light distribution in the image-taking area, thereby ensuring the clarity of the image. Racks are fixedly arranged on the top surface of the horizontal slide rail 901 and the side surface of the vertical slide rail 903. Axles are rotatably arranged on the side surfaces of the horizontal positioning block 902, the first vertical positioning block 904 and the second vertical positioning block 905. The inner ends of the axles are fixedly connected with gears meshing with the racks. By rotating the axles, the horizontal position of the horizontal block 902 on the horizontal slide rail 901 or the vertical position of the first vertical positioning block 904 and the second vertical positioning block 905 on the vertical slide rail 903 can be adjusted, thereby adjusting the phase position and orientation effect of the CCD camera 906. A camera bracket 16 is fixedly arranged on the top surface of the air-drying base 1, and the horizontal slide rail 901 is fixedly installed on the top of the camera bracket 16.

[0037] During the air-drying process, the camera assembly 9 obtains the dial image information of the water meter 100 and transmits it to the controller 2. The controller 2 has built-in image information processing software based on visual recognition (existing technology). After recognition by the image information processing software, the dial display value in the image is converted into an actual value, so as to determine whether the value is within the preset correction value range, and the value is displayed on the display screen 3. At the same time, each water meter 100 has a mark code, and the corresponding mark code is also displayed on the display screen 3. The detection data of the corresponding water meter will be saved in the controller 2 for reference and output printing.

[0038] The specific structure of the first air supply positioning component is as follows Figure 4As shown. Specifically, a first positioning cylinder 6 located on the right side of the water meter placement seat 5 is fixedly provided on the top surface of the air-drying base 1, and the output rod end of the first positioning cylinder 6 is fixedly connected to the first air supply connector 7, and the side wall of the first air supply connector 7 is connected to the first air inlet pipe 8. The first positioning cylinder 6 drives the first air supply connector 7 to move horizontally, so that the outlet of the first air supply connector 7 is connected or separated from the right side port of the water meter 100 to be air-dried. The first air inlet pipe 8 is connected to the air outlet end of the air supply component, and a stable flow of dry gas can be continuously output to the first air inlet pipe 8 through the air supply component. A first cylinder bracket 19 is fixedly provided at the right end of the top surface of the air-drying base 1, and the first positioning cylinder 6 is fixedly installed on the top surface of the first cylinder bracket 19. The first positioning cylinder 6 adopts a thin cylinder with a guide rod, and its output rod end is fixedly connected to a push plate. The first air supply connector 7 is a hollow frustum column structure, and connecting lugs are integrally provided on both sides of its outer wall, and fixedly connected to the side of the push plate by screws. When the output rod of the first positioning cylinder 6 is extended, the first air supply connector 7 is close to the water inlet end of the water meter 100 to be air-dried and docked with the water inlet end, so that the gas in the first air inlet pipe 8 can be sent into the water meter 100 to be air-dried by the first air supply connector 7; when the output rod of the first positioning cylinder 6 is retracted, the first air supply connector 7 is reset and separated from the water inlet end of the water meter 100. A sealing cushion layer is fixedly provided on the outer surface of the frustum end of the first air supply connector 7 to ensure the accuracy and sealing of the docking between the connector and the port of the water meter 100.

[0039] The second air supply positioning assembly has the same structural composition as the first air supply positioning assembly, and is arranged opposite to the first air supply positioning assembly on the left and right sides of the water meter placement seat 5. Specifically, the second air supply positioning assembly includes a second positioning cylinder 10 arranged on the left side of the water meter placement seat 5, the output rod end of the second positioning cylinder 10 is fixedly connected to a second air supply connector 11 arranged opposite to the first air supply connector 7, and a second air inlet pipe 12 is connected to the side wall of the second air supply connector 11. The second positioning cylinder 10 drives the second air supply connector 11 to move horizontally, so that the air outlet of the second air supply connector 11 is connected to or separated from the left port of the water meter 100 to be air-dried. In this embodiment, the first air inlet pipe 8 is connected to the bottom of the outer wall of the first air supply connector 7, and the second air inlet pipe 12 is connected to the bottom of the outer wall of the second air supply connector 11, and both are hung downward. Therefore, water pipe grooves are opened on both sides of the top surface of the air-drying base 1 on both sides of the water meter placement seat 5. The first air inlet pipe 8 and the second air inlet pipe 12 are respectively movably arranged in the water pipe grooves, so that the first air inlet pipe 8 can move horizontally synchronously with the first air supply connector 7, and the second air inlet pipe 12 can move horizontally synchronously with the second air supply connector 11, and the bottom ends of the first air inlet pipe 8 and the second air inlet pipe 12 can pass through to the bottom of the air-drying base 1 and be connected to the air outlet end of the air supply component.

[0040] The structure of the air supply assembly is as follows: Figure 6Specifically, an air pump 13 and a two-position five-way valve 14 are fixedly installed on the bottom surface of the air drying base 1. The P1 input port and the P2 input port of the two-position five-way valve 14 are connected to the output end of the air pump 13 at the same time. The A output port of the two-position five-way valve 14 is connected to the first air inlet pipe 8, the B output port is connected to the second air inlet pipe 12, and the T common output port is connected to the exhaust pipe 15. Figure 7 As shown, when the two-position five-way valve 14 is in the left position, the P1 input port is closed, the P2 input port is connected to the B output port, and the A output port is connected to the T common output port. Then, the airflow output by the air pump 13 is sent from the P2 input port and the B output port into the right port of the water meter 100 to be air-dried. In the process of the airflow flowing from the right port to the left port of the water meter 100, a single air-drying process is completed. The air-dried gas is discharged from the left port of the water meter 100, and then flows from the A output port to the T common output port, and then discharged from the T common output port; as shown in FIG. Figure 8 As shown, when the two-position five-way valve 14 is in the right position, the P2 input port is closed, the P1 input port is connected to the A output port, and the B output port is connected to the T common output port. Then, the airflow output by the air pump 13 is sent from the P1 input port and the A output port to the left port of the water meter 100 to be air-dried. In the process of the airflow flowing from the left port to the right port of the water meter 100, a single air-drying process is completed. The air after air-drying is discharged from the right port of the water meter 100, and then flows from the B output port to the T common output port, and then discharged from the T common output port. In this way, by changing the position state of the two-position five-way valve, the direction of the airflow flowing into the water meter 100 can be switched, and then the internal air-drying of the water meter 100 can be achieved by reciprocating switching ventilation. The forward and reverse rotation of the meter needle is achieved during the air-drying process, and the zeroing operation of the dial pointer of the water meter 100 is also achieved based on this method.

[0041] The use process of the detection device is as follows:

[0042] S1, start the device, the system is initially reset, the rodless cylinder 4 is in the reverse stroke position, that is, the water meter placement seat 5 is located in the manual operation position on the front side of the air-drying base 1, and the output rods of the first positioning cylinder 6 and the second positioning cylinder 10 are both in a retracted state;

[0043] S2, place the water meter 100 to be tested in the water meter placement seat 5, and after confirming that the placement position of the water meter 100 is correct, manually press the detection start control switch, and the controller 2 controls the rodless cylinder 4 to work forward to the forward stroke position, driving the water meter placement seat 5 and the water meter 100 therein to move horizontally to the air-drying position;

[0044] S3, the first positioning cylinder 6 and the second positioning cylinder 10 work synchronously in the forward direction, the first positioning cylinder 6 drives the first air supply connector 7 to dock with the right port of the water meter 100, and the second positioning cylinder 10 drives the second air supply connector 11 to dock with the left port of the water meter 100;

[0045] S4, the controller 2 controls the two-position five-way valve 14 to operate and place it at the left station, the air flow output by the air supply assembly is sent to the first air supply connector 7 through the first air inlet pipe 8, and then dries the inside of the water meter 100 through the water meter 100, and then flows into the second air inlet pipe 12 through the second air supply connector 11, and then discharged into the environment through the exhaust pipe 15;

[0046] S5, the controller 2 controls the two-position five-way valve 14 to operate and place it at the right station, the air flow output by the air supply assembly is sent to the second air supply connector 11 through the second air inlet pipe 12, and then dries the inside of the water meter 100 through the water meter 100, and then flows into the first air inlet pipe 8 through the first air supply connector 7, and then is discharged into the environment through the exhaust pipe 15;

[0047] S6, cyclically repeating the above-mentioned S4 process and S5 process until the number of cycles reaches a preset number of times, at which time the interior of the water meter 100 is in a completely air-dried state;

[0048] S7, the camera component 9 obtains the dial image information of the water meter 100 and transmits it to the controller 2. After being recognized by the image information processing software, the dial display value in the image is converted into an actual value, so as to determine whether the value reaches the preset calibration value range; if so, the air-drying process ends and the next process is directly performed; if not, the process of S4 or the process of S5 is performed separately until the value reaches the preset calibration value range;

[0049] S8, the controller 2 controls the first positioning cylinder 6 and the second positioning cylinder 10 to work in reverse and reset respectively, and the rodless cylinder 4 works in reverse to reset the water meter placement seat 5 and re-position it in the front manual operation position of the air-drying base 1, and the operator takes the air-dried water meter 100 out of the water meter placement seat 5.

[0050] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A water meter air-drying device, comprising an air-drying base (1), and a controller (2) fixedly arranged on one side of the top surface of the air-drying base (1), characterized in that: A water meter placement seat (5) is arranged on the top surface of the air-drying base (1), and the water meter (100) to be air-dried is embedded in the water meter placement seat (5). A first positioning cylinder (6) and a second positioning cylinder (10) are respectively fixedly arranged on the top surface of the air-drying base (1) and are located on opposite sides of the water meter placement seat (5). The output rod end of the first positioning cylinder (6) is fixedly connected to a first air supply joint (7), and a first air inlet pipe (8) is connected to the side wall of the first air supply joint (7). The output rod end of the second positioning cylinder (10) is fixedly connected to a second air supply joint (11) arranged opposite to the first air supply joint (7), and a second air inlet pipe (12) is connected to the side wall of the second air supply joint (11). The air outlets of the first air supply joint (7) and the second air supply joint (11) are respectively connected to or separated from the two ports of the water meter (100) to be tested. An air pump (13) and a two-position five-way valve (14) are fixedly mounted on the bottom surface of the air-drying base (1); the P1 input port and the P2 input port of the two-position five-way valve (14) are simultaneously connected to the output end of the air pump (13); the A output port of the two-position five-way valve (14) is connected to the first air inlet pipe (8), the B output port is connected to the second air inlet pipe (12), and the T common output port is connected to the exhaust pipe (15); When the two-position five-way valve (14) is in the left position, the P1 input port is closed, the P2 input port is connected to the B output port, and the A output port is connected to the T common output port; when the two-position five-way valve (14) is in the right position, the P2 input port is closed, the P1 input port is connected to the A output port, and the B output port is connected to the T common output port.

2. A water meter air drying device according to claim 1, characterized in that: A camera assembly (9) located on one side of the water meter placement seat (5) is fixedly mounted on the top surface of the air-drying base (1), and the camera end of the camera assembly (9) is aligned with the top surface of the dial of the water meter (100) to be inspected.

3. A water meter air drying device according to claim 2, characterized in that: The camera assembly (9) comprises a horizontal slide rail (901), a horizontal positioning block (902) slidably connected to the horizontal slide rail (901), a vertical slide rail (903) fixedly arranged on the top surface of the horizontal positioning block (902), a first vertical positioning block (904) and a second vertical positioning block (905) respectively slidably connected to the vertical slide rail (903), a CCD camera (906) connected to the controller (2) being fixedly connected to the side of the first vertical positioning block (904), a light source box (907) located directly below the CCD camera (906) being fixedly connected to the side of the second vertical positioning block (905), and a condenser (908) being fixedly arranged at the bottom of the light source box (907).

4. A water meter air drying device according to claim 3, characterized in that: A camera bracket (16) is fixedly arranged on the top surface of the air-drying base (1), and the horizontal slide rail (901) is fixedly installed on the top of the camera bracket (16).

5. A water meter air drying device according to claim 2, characterized in that: The top surface of the air-drying base (1) is fixedly provided with a rodless cylinder (4) located between a first positioning cylinder (6) and a second positioning cylinder (10), and the water meter placement seat (5) is fixedly installed on the top of the power output end of the rodless cylinder (4).

6. A water meter air drying device according to claim 5, characterized in that: Auxiliary support platforms (17) distributed on both sides of the rodless cylinder (4) are fixedly arranged on the top surface of the air-drying base (1), and the bottom surface of the water meter placement seat (5) is slidably fitted with the top surface of the auxiliary support platform (17).

7. A water meter air drying device according to any one of claims 1 to 6, characterized in that: A display screen (3) connected to the controller (2) is fixedly arranged on one side of the top surface of the air-drying base (1).

8. A water meter air drying device according to claim 7, characterized in that: A protective cover (18) is fixedly arranged on the top surface of the air-drying base (1), and the display screen (3) is installed in the protective cover (18).

9. A water meter air drying device according to any one of claims 1 to 6, characterized in that: Air pipe grooves are respectively provided on both sides of the top surface of the air-drying base (1), and the first air inlet pipe (8) and the second air inlet pipe (12) are respectively movably arranged in the air pipe grooves.

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