Commutator special for water meter verification and multi-meter-position water meter verification system
By designing a special commutator for water meter calibration that includes a bracket and a diversion box, and utilizing a sliding guide and buffer structure, the problem of corrugated pipe deformation affecting metering was solved, thereby improving the accuracy of water meter calibration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-03-27
AI Technical Summary
The core working principle of commonly used commutators causes bellows deformation, affecting water flow rate and velocity, which in turn interferes with the measurement results of metering valves, resulting in inaccurate water meter calibration results.
A special commutator for water meter calibration is adopted, including a bracket and a diversion outer box, with a diversion inner box and a telescopic power unit inside. Through sliding guide and buffer structure, it is ensured that the fixed nozzle does not deform as the diversion inner box slides, thus maintaining stable water flow and water velocity.
This improved the accuracy of the measurement results of the metering switch valve and enhanced the accuracy of water meter calibration.
Smart Images
Figure CN121740198A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of water meter calibration technology, and in particular to a special commutator for water meter calibration and a multi-position water meter calibration system. Background Technology
[0002] A water meter is an instrument used to measure, record, and display water flow. The water meter's readings serve as the basis for settlement between water companies and water users. To ensure the accuracy of water meter measurements, the state includes water meters in the mandatory verification catalog of measuring instruments, requiring verification of their measurement accuracy within a legally stipulated period to protect the legitimate rights and interests of both water suppliers and users. Water meter verification mainly includes checking appearance, markings and seals, electronic device functionality, sealing performance, and indication error. Among these, the indication error verification is the most labor-intensive and time-consuming.
[0003] The indication error of water meters is mainly verified using the comparison method. This involves comparing the cumulative flow reading of the water meter with the measurement results of a standard measuring device to determine the indication error of the water meter under test. According to the "Verification Procedure for Drinking Cold Water Meters" (JJG 162-2019), the verification methods for water meters include the start-stop method, the reversal method, and the flow-time method. During water meter verification, the indication error needs to be tested at three flow points: the commonly used flow rate Q3, the boundary flow rate Q2, and the minimum flow rate Q1. Only when the indication errors at all three flow points are less than the specified maximum permissible error requirement is the water meter considered to have a qualified indication error. Water meters can be installed individually on the verification device for verification, or multiple water meters of the same model and specifications can be connected in series on the verification device for simultaneous verification.
[0004] For example, Chinese patent application number CN202510713708.X discloses a multi-position water meter calibration device, including a water circulation module, a water meter clamping module, a sealing calibration module, a flow detection module, and a water volume metering module. The water circulation module can drive the calibration water to circulate in the circulation pipeline. The water meter clamping module includes multiple meter positions to be tested, which are connected in series in the circulation pipeline. The sealing calibration module is connected to the water meter clamping module. The flow detection module and the water volume metering module are respectively arranged in the circulation pipeline. The flow detection module includes multiple flow meters with different scale divisions, and one of the flow meters is selectively connected to the circulation pipeline. The water volume metering module includes multiple water volume meters with different scale divisions, and one of the water volume meters is selectively connected to the circulation pipeline.
[0005] The water metering module further includes multiple metering switch valves and multiple directional valves. Each metering switch valve is connected between the upstream end of the circulation pipeline and one of the directional valves. The directional valve includes a directional valve frame, a water inlet interface, a bellows, a rotary connector, a directional pipe, a directional cylinder, and a dual-chamber water receiver. The water inlet interface is located on the upper part of the directional valve frame and is connected to one of the metering switch valves. The bellows is connected between the water inlet interface and the rotary connector. The rotary connector is rotatably connected to the directional valve frame. The directional pipe is connected to the rotary connector. The dual-chamber water receiver is located below the directional valve frame.
[0006] Regarding the aforementioned technologies, the inventors believe that the following defects exist:
[0007] The use of directional switches in common water meter calibration devices significantly affects the measurement accuracy of metering valves. However, the core working principle of commonly used directional switches is as follows: the directional cylinder drives the directional tube to swing, which in turn drives the rotating connector and bellows to swing together. The swinging bellows will deform due to compression, so the water flow rate and water velocity through the bellows will be significantly affected, which will greatly interfere with the measurement results of the metering valve and lead to inaccurate water meter calibration results. Summary of the Invention
[0008] This application provides a dedicated commutator for water meter calibration and a multi-position water meter calibration system to improve the following technical problems:
[0009] The core working principle of a common commutator is as follows: the commutator cylinder drives the commutator tube to swing, which in turn drives the rotating connector and the bellows to swing together. The swinging bellows will deform due to compression, so the water flow rate and water velocity through the bellows will be significantly affected, which will greatly interfere with the measurement results of the metering switch valve and also lead to the water meter calibration results being inaccurate.
[0010] This application provides a dedicated commutator for water meter calibration and a multi-position water meter calibration system, employing the following technical solution:
[0011] A special commutator for water meter calibration includes a bracket and a diverter outer box. The diverter outer box is fixed inside the bracket. The bottom of the diverter outer box has a first inverted V-groove and forms a first water outlet section and a second water outlet section. A vertically arranged fixed nozzle is provided at the top opening of the diverter outer box. The bottom outlet of the fixed nozzle is located directly above the top of the first inverted V-groove. A diverter inner box is also horizontally slidably assembled inside the diverter outer box. The bottom of the diverter inner box has a second inverted V-groove and forms a third water outlet section and a fourth water outlet section. The third water outlet section is inserted into and freely moves within the first inverted V-groove. Inside the water outlet section, the fourth water outlet section is inserted and moves freely within the first water outlet section. The bottom outlet of the fixed nozzle is inserted into the top opening of the inner diversion box, and the two do not contact each other. The outer side of the outer diversion box is also provided with a telescopic power unit. The telescopic power unit is connected to the inner diversion box and drives the inner diversion box to slide back and forth. When the inner diversion box slides to one side, the liquid discharged by the fixed nozzle flows through the third water outlet section to the first water outlet section. When the inner diversion box slides to the other side, the liquid discharged by the fixed nozzle flows through the fourth water outlet section to the second water outlet section.
[0012] In one feasible technical solution of this application, the fixed nozzle includes an inter-connected irregular-shaped connecting pipe, a square flat pipe and a flange connection, the flange connection is fixed to the top of the irregular-shaped connecting pipe, the square flat pipe is fixed to the bottom of the irregular-shaped connecting pipe, and a fixing seat for fixing the square flat pipe is provided at the top opening of the diversion box.
[0013] In one feasible technical solution of this application, the fixing seat includes a first angle steel bar and a second angle steel bar, the first angle steel bar and the second angle steel bar are arranged in parallel and symmetrically at intervals and form a gap, and the square flat tube is clamped and fixed between the first angle steel bar and the second angle steel bar.
[0014] In one feasible technical solution of this application, a set of sliding guide portions are respectively provided between the inner two sides of the diversion outer box and the top two sides of the diversion inner box.
[0015] In one feasible technical solution of this application, the sliding guide part includes a horizontally arranged guide rod and multiple perforated ear plates. The two ends of the guide rod are respectively fixed to the two opposing inner walls of the diversion outer box, and the perforated ear plates are vertically fixed to the outer side wall of the diversion inner box. The guide rod slides through the multiple perforated ear plates.
[0016] In one feasible technical solution of this application, the sliding guide part further includes two sets of buffer springs, the two ends of the guide rod respectively pass through the two sets of buffer springs, and the two ends of the buffer springs respectively abut against the adjacent inner wall of the diversion box and the perforated ear plate.
[0017] In one feasible technical solution of this application, at least one of the guide rods has two annular pressure sensors passing through it. The annular pressure sensors are sandwiched between the buffer spring and the adjacent perforated lug. The annular pressure sensors are used to detect the squeezing force of the perforated lug on the buffer spring. The two annular pressure sensors and the telescopic power unit are all electrically connected to a control module. The control module has a preset standard pressure value.
[0018] When the squeezing pressure detected by the annular pressure sensor near the third water outlet exceeds the corresponding standard pressure value, it indicates that the third water outlet has just slid to the center of the first water outlet and the two are not in contact. When the squeezing pressure detected by the annular pressure sensor near the fourth water outlet exceeds the corresponding standard pressure value, it indicates that the fourth water outlet has just slid to the center of the second water outlet and the two are not in contact. The telescopic power unit is controlled by the control module to stop the current driving action.
[0019] In one feasible technical solution of this application, a cylindrical seat is also vertically connected to the outer side of the diversion inner box, and the end of the drive rod of the telescopic power unit is inserted into the cylindrical seat and the two are fixedly connected.
[0020] In one feasible technical solution of this application, a mounting plate is also vertically arranged on the outer side wall of the diversion box, and the telescopic power unit is mounted on the mounting plate. The telescopic power unit is a cylinder, a hydraulic cylinder, an electric push rod, or a servo electric cylinder.
[0021] Secondly, this application provides a multi-position water meter calibration system, which adopts the following technical solution:
[0022] A multi-position water meter calibration system includes the aforementioned dedicated commutator for water meter calibration.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] Initially, the inner diversion box can be located on one side inside the outer diversion box. At this time, the liquid discharged from the fixed nozzle flows to the first outlet pipe through the third outlet pipe. After the telescopic power unit is activated, the inner diversion box is driven to slide towards the other side inside the outer diversion box. The liquid discharged from the fixed nozzle flows to the second outlet pipe through the fourth outlet pipe. During the above diversion reversal process, only the inner diversion box is driven to slide by the telescopic power unit. The fixed nozzle is designed to be fixedly installed. This blocking structure ensures that the fixed nozzle will not be displaced or deformed as the inner diversion box slides. The water supply pipeline with the metering switch valve can be directly connected to the fixed nozzle. The water flow rate and water velocity of the metering switch valve will not be affected, thereby greatly improving the measurement results of the metering switch valve and improving the accuracy of the water meter calibration results. Attached Figure Description
[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0026] Figure 1 This is a schematic diagram of the structure of a water meter calibration commutator according to an embodiment of this application.
[0027] Figure 2 This is a schematic diagram of the structure of the diversion inner box and the sliding guide in the embodiment of this application.
[0028] Figure 3 This is a schematic diagram of the fixed nozzle structure in an embodiment of this application.
[0029] Figure 4 This is a structural schematic diagram of the diversion box and the fixing base in the embodiments of this application.
[0030] Figure 5 This is a schematic diagram of the structure of the multi-position water meter calibration system according to an embodiment of this application.
[0031] Figure 6 This is a schematic diagram of the principle of the multi-position water meter calibration system according to an embodiment of this application.
[0032] Explanation of reference numerals in the attached figures:
[0033] 10. Water meter calibration special reversing unit; 1. Bracket; 2. Diverter outer box; 21. First outlet pipe section; 22. Second outlet pipe section; 3. Fixed nozzle; 31. Irregular connecting pipe; 32. Square flat pipe; 33. Flange connection section; 34. Height adjustment section; 341. Screw; 342. Adjusting nut; 4. Diverter inner box; 41. Third outlet pipe section; 42. Fourth outlet pipe section; 43. Cylindrical seat; 5. Telescopic power section; 6. Fixed seat; 61. First angle steel bar; 611. First fixing plate; 612. First strip hole; 62. Second angle steel bar; 621. Second fixing plate; 622. Second strip hole; 7. Sliding guide section; 71. Guide rod; 72. Perforated ear plate; 73. Buffer spring; 8. Ring pressure sensor; 9. Mounting plate;
[0034] 20. Water tank;
[0035] 30. Water supply pipeline module;
[0036] 40. Test stand for the water meter to be tested;
[0037] 50. Water outlet pipeline module;
[0038] 60. Weighing module. Detailed Implementation
[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0043] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.
[0044] This application discloses a dedicated commutator 10 for water meter calibration. (Refer to...) Figure 1-4 The water meter calibration commutator 10 includes a bracket 1 and a diversion outer box 2. The diversion outer box 2 is fixed inside the bracket 1. The bottom of the diversion outer box 2 has a first inverted V groove and forms a first water outlet section 21 and a second water outlet section 22. A vertically arranged fixed nozzle 3 is provided at the top opening of the diversion outer box 2. The bottom drain of the fixed nozzle 3 is located directly above the top of the first inverted V groove. A diversion inner box 4 is also horizontally slidably assembled inside the diversion outer box 2. The bottom of the diversion inner box 4 has a second inverted V groove and forms a third water outlet section 41 and a fourth water outlet section 42. The third water outlet section 41 is inserted and freely movable. The first water outlet pipe 21 is inserted into the fourth water outlet pipe 42, which is also inserted into and moves freely within the first water outlet pipe 21. The bottom outlet of the fixed nozzle 3 is inserted into the top opening of the diversion inner box 4, and the two do not contact each other. The outside of the diversion outer box 2 is also provided with a telescopic power unit 5, which is connected to the diversion inner box 4 and drives the diversion inner box 4 to slide back and forth. When the diversion inner box 4 slides to one side, the liquid discharged by the fixed nozzle 3 flows through the third water outlet pipe 41 to the first water outlet pipe 21. When the diversion inner box 4 slides to the other side, the liquid discharged by the fixed nozzle 3 flows through the fourth water outlet pipe 42 to the second water outlet pipe 22.
[0045] In this embodiment, the fixed nozzle 3 includes an interconnected irregularly shaped connecting pipe 31, a square flat pipe 32, and a flange connection 33. The flange connection 33 is fixed to the top of the irregularly shaped connecting pipe 31, and the square flat pipe 32 is fixed to the bottom of the irregularly shaped connecting pipe 31. A fixing seat 6 for fixing the square flat pipe 32 is provided at the top opening of the diversion box 2. The fixed nozzle 3 designed above can be customized as a steel component, which makes the structure more robust and durable, and also facilitates the connection and fixing of the fixed nozzle 3 to the water supply pipeline and to the diversion box 2.
[0046] The fixing seat 6 includes a first angle steel strip 61 and a second angle steel strip 62. The first angle steel strip 61 and the second angle steel strip 62 are arranged parallel and symmetrically at intervals, forming a gap. A square flat tube 32 is clamped and fixed between the first angle steel strip 61 and the second angle steel strip 62. The first angle steel strip 61 and the second angle steel strip 62 are fixed to the top of the diversion outer box 2 by screws. The fixing seat 6 designed above has a simple structure and is easy to manufacture. After the angle steel strips are fixed to the square flat tube 32, the fixing effect of the nozzle 3 is better. At the same time, the fixing seat 6 also has a certain reinforcement effect on the top opening of the diversion outer box 2.
[0047] In practical applications, because different tests require different water pressures, the water flow velocity from the fixed nozzle 3 is also different. Therefore, it is necessary to adjust the gap height between the bottom of the fixed nozzle 3 and the top of the diversion box 4. If the gap height is too small, it is easy for the fixed nozzle 3 and the diversion box 4 to collide. If the gap height is too large, it is easy for the water flow from the fixed nozzle 3 to not fall into the diversion box 4.
[0048] To meet the above requirements, a vertically arranged first fixing plate 611 is provided in the middle of the first angle steel bar 61, and a first strip hole 612 is provided along the middle of the first fixing plate 611. A vertically arranged second fixing plate 621 is provided in the middle of the second angle steel bar 62, and a second strip hole 622 is provided along the middle of the second fixing plate 621.
[0049] The two outer side walls of the square flat tube 32 are provided with height adjustment parts 34. The height adjustment parts 34 include screws 341 and adjusting nuts 342. The screws 341 are vertically welded to the middle of the outer side wall of the square flat tube 32. The adjusting nuts 342 are threaded onto the screws 341. One screw 341 passes through the first strip hole 612 and is used with the corresponding adjusting nut 342 to clamp and fix the first angle steel strip 61. Another screw 341 passes through the second strip hole 622 and is used with the corresponding adjusting nut 342 to clamp and fix the second angle steel strip 61. This allows for a small range of adjustment of the height of the fixed nozzle 3 to meet different test requirements.
[0050] In order to achieve stable sliding of the inner box 4 within the outer box 2 and effectively avoid the shaking problem of the inner box 4, a set of sliding guides 7 are respectively provided between the inner two sides of the outer box 2 and the top two sides of the inner box 4.
[0051] The sliding guide part 7 includes a horizontally arranged guide rod 71 and multiple perforated ear plates 72. The two ends of the guide rod 71 are respectively fixed to the two opposing inner walls of the diversion outer box 2, and the perforated ear plates 72 are vertically fixed to the outer wall of the diversion inner box 4. The guide rod 71 slides through the multiple perforated ear plates 72. The sliding guide part 7 also includes two sets of buffer springs 73. The two ends of the guide rod 71 pass through the two sets of buffer springs 73, and the two ends of the buffer springs 73 abut against the adjacent inner wall of the diversion outer box 2 and the perforated ear plates 72.
[0052] The sliding guide 7 designed above has a simple structure and a good sliding guiding effect on the inner box 4. In addition, the added buffer spring 73 can reduce the impact on the outer box 2 when the inner box 4 slides to the extreme positions on both sides. It not only reduces noise, but also provides good protection for both the outer box 2 and the inner box 4, and extends the service life.
[0053] In order to more accurately control the termination timing of the telescopic power unit 5, at least one guide rod 71 has two annular pressure sensors 8. The annular pressure sensors 8 are sandwiched between the buffer spring 73 and the adjacent perforated ear plate 72. The annular pressure sensors 8 are used to detect the squeezing force of the perforated ear plate 72 on the buffer spring 73. The two annular pressure sensors 8 and the telescopic power unit 5 are all electrically connected to a control module. The control module has a preset standard pressure value.
[0054] When the squeezing pressure detected by the annular pressure sensor 8 near the third water outlet section 41 exceeds the corresponding standard pressure value, it indicates that the third water outlet section 41 has just slid to the center of the first water outlet section 21 and the two are not in contact. When the squeezing pressure detected by the annular pressure sensor 8 near the fourth water outlet section 42 exceeds the corresponding standard pressure value, it indicates that the fourth water outlet section 42 has just slid to the center of the second water outlet section 22 and the two are not in contact. The telescopic power unit 5 is controlled by the control module to stop the current driving action, thereby effectively avoiding the problem of impact and deformation caused by the over-driving of the diversion inner box 4.
[0055] To facilitate the connection between the inner diversion box 4 and the telescopic power unit 5, a cylindrical seat 43 is vertically connected to the outer side of the inner diversion box 4. The end of the drive rod of the telescopic power unit 5 is inserted into the cylindrical seat 43 and the two are fixedly connected. To facilitate the installation and fixing of the telescopic power unit 5, a mounting plate 9 is vertically provided on the outer side wall of the outer diversion box 2. The telescopic power unit 5 is installed on the mounting plate 9. The telescopic power unit 5 is a cylinder, hydraulic cylinder, electric push rod or servo electric cylinder.
[0056] The beneficial technical effects of the water meter calibration commutator 10 in this application embodiment are roughly as follows:
[0057] Initially, the inner diversion box 4 can be located on one side inside the outer diversion box 2. At this time, the liquid discharged from the fixed nozzle 3 flows to the first outlet pipe 21 through the third outlet pipe 41. After the telescopic power unit 5 is activated, the inner diversion box 4 is driven to slide towards the other side inside the outer diversion box 2. The liquid discharged from the fixed nozzle 3 flows to the second outlet pipe 22 through the fourth outlet pipe 42. During the above diversion reversal process, only the inner diversion box 4 is driven to slide by the telescopic power unit 5. The fixed nozzle 3 is designed to be fixedly installed. This blocking structure ensures that the fixed nozzle 3 will not be displaced or deformed as the inner diversion box 4 slides. The water supply pipeline with the metering switch valve can be directly connected to the fixed nozzle 3. The water flow rate and water velocity of the metering switch valve will not be affected, thereby greatly improving the measurement results of the metering switch valve and improving the accuracy of the water meter calibration results.
[0058] This application also provides a multi-position water meter calibration system; please refer to... Figure 5 and Figure 6 The system includes a water tank 20, a water supply pipeline module 30, a test platform for water meters under test 40, an outlet pipeline module 50, and a weighing module 60. The water supply pipeline module 30 is located between the water tank 20 and the test platform for water meters under test 40. Multiple water meters under test can be detachably installed on the test platform for water meters under test 40. The outlet pipeline module 50 is connected to the outlet end of the test platform for water meters under test 40. The outlet pipeline module 50 has multiple branch water supply pipelines, and each water supply pipeline is equipped with a metering switch valve with a specific range. The outlet pipeline module 50 has multiple outlet ends, and each outlet end is equipped with a water meter calibration special reversing device 10 as described above. One side of the water meter calibration special reversing device 10 drains water into the weighing container of the weighing module 60, and the other side of the water meter calibration special reversing device 10 drains water into the water tank 20 for recycling.
[0059] In this embodiment, the water tank 20 is used for water storage, and the water supply pipeline module 30 can be divided into three lines—DN100, DN25, and DN15. The numbers 100, 25, and 15 all represent the pipe diameter, thus representing three different flow rates of water output. The appropriate line can be selected based on the actual flow rate of the water meter being tested. A DN15 pneumatic valve is connected in parallel on the DN100 pipeline for pressure relief, which is equivalent to an overflow valve in hydraulic systems for protection. The water supply pipeline module 30 also includes a 100L pressure stabilizing tank and a 700L pressure stabilizing tank. The 100L and 700L pressure stabilizing tanks are used to maintain the water output pressure and can be selected according to different pipelines. The piston device in the water supply pipeline module 30 has a syringe-like structure and is driven by a motor to output water. The piston device is mainly used for small flow rate testing.
[0060] Multiple water meters to be tested are installed in series on the test stand 40. A DN15 valve is connected to the rear end of the test stand to allow air inflow and ensure smooth water flow. A DN25 valve is also connected to the rear end of the test stand for emergency drainage.
[0061] The water outlet pipeline module 50 has four branches, or more. Among them, the four branches of DN4, DN8, DN25 and DN50 can be selected for flow during testing. The branches are controlled to open and close by electric valves. The metering switch valve on each branch is used to detect the flow rate. The metering switch valve and the subsequent weighing module 60 detect the flow rate at the same time to improve the detection accuracy.
[0062] The weighing module 60 is equipped with two standard scales with capacities of 600 kg and 64 kg, which are installed at the bottom of two weighing containers of different sizes. Two water meter calibration commutators 10 are located above the openings of the two weighing containers, and are used to switch the water path.
[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A special commutator for water meter calibration, comprising a bracket (1) and a diversion box (2), wherein the diversion box (2) is fixed inside the bracket (1), characterized in that, The bottom of the diversion outer box (2) has a first inverted V groove and forms a first water outlet section (21) and a second water outlet section (22). A vertically arranged fixed nozzle (3) is provided at the top opening of the diversion outer box (2). The bottom drain of the fixed nozzle (3) is located directly above the top of the first inverted V groove. The diversion outer box (2) is also horizontally slidably fitted with a diversion inner box (4). The bottom of the diversion inner box (4) has a second inverted V groove and forms a third water outlet section (41) and a fourth water outlet section (42). The third water outlet section (41) is inserted into and moves freely within the first water outlet section (21), and the fourth water outlet section (42) is inserted into and moves freely. Inside the first water outlet pipe section (21), the bottom drain of the fixed nozzle (3) is inserted into the top opening of the diversion inner box (4) and the two do not contact each other. The outside of the diversion outer box (2) is also provided with a telescopic power part (5). The telescopic power part (5) is connected to the diversion inner box (4) and drives the diversion inner box (4) to slide back and forth. When the diversion inner box (4) slides to one side, the liquid discharged by the fixed nozzle (3) flows through the third water outlet pipe section (41) to the first water outlet pipe section (21). When the diversion inner box (4) slides to the other side, the liquid discharged by the fixed nozzle (3) flows through the fourth water outlet pipe section (42) to the second water outlet pipe section (22).
2. The special commutator for water meter calibration according to claim 1, characterized in that, The fixed nozzle (3) includes an interconnected irregular connecting pipe (31), a square flat pipe (32), and a flange connection (33). The flange connection (33) is fixed to the top of the irregular connecting pipe (31), and the square flat pipe (32) is fixed to the bottom of the irregular connecting pipe (31). A fixing seat (6) for fixing the square flat pipe (32) is provided at the top opening of the diversion box (2).
3. The special commutator for water meter calibration according to claim 2, characterized in that, The fixing seat (6) includes a first angle steel bar (61) and a second angle steel bar (62). The first angle steel bar (61) and the second angle steel bar (62) are arranged in parallel and symmetrically at intervals and form a gap. The square flat tube (32) is clamped and fixed between the first angle steel bar (61) and the second angle steel bar (62).
4. The special commutator for water meter calibration according to claim 1, characterized in that, A set of sliding guides (7) is provided between the inner two sides of the outer diversion box (2) and the top two sides of the inner diversion box (4).
5. The special commutator for water meter calibration according to claim 4, characterized in that, The sliding guide (7) includes a horizontally arranged guide rod (71) and multiple perforated ear plates (72). The two ends of the guide rod (71) are respectively fixed to the two opposing inner walls of the diversion outer box (2). The perforated ear plates (72) are vertically fixed to the outer wall of the diversion inner box (4). The guide rod (71) slides through the multiple perforated ear plates (72).
6. The special commutator for water meter calibration according to claim 5, characterized in that, The sliding guide (7) also includes two sets of buffer springs (73). The two ends of the guide rod (71) pass through the two sets of buffer springs (73), and the two ends of the buffer springs (73) abut against the adjacent inner wall of the diversion box (2) and the perforated ear plate (72).
7. The special commutator for water meter calibration according to claim 5, characterized in that, At least one of the guide rods (71) has two annular pressure sensors (8) running through it. The annular pressure sensors (8) are sandwiched between the buffer spring (73) and the adjacent perforated lug (72). The annular pressure sensors (8) are used to detect the squeezing force of the perforated lug (72) on the buffer spring (73). The two annular pressure sensors (8) and the telescopic power unit (5) are all electrically connected to a control module. The control module has a preset standard pressure value. When the squeezing pressure value detected by the annular pressure sensor (8) near the third water outlet section (41) exceeds the corresponding standard pressure value, it means that the third water outlet section (41) has just slid to the center of the first water outlet section (21) and the two are not in contact. When the squeezing pressure value detected by the annular pressure sensor (8) near the fourth water outlet section (42) exceeds the corresponding standard pressure value, it means that the fourth water outlet section (42) has just slid to the center of the second water outlet section (22) and the two are not in contact. The telescopic power unit (5) is controlled by the control module to stop the current driving action.
8. The special commutator for water meter calibration according to claim 1, characterized in that, The outer side of the diversion inner box (4) is also vertically connected to a cylindrical seat (43), and the end of the drive rod of the telescopic power unit (5) is inserted into the cylindrical seat (43) and the two are fixedly connected.
9. The special commutator for water meter calibration according to claim 1, characterized in that, An installation plate (9) is vertically arranged on the outer side wall of the diversion box (2), and the telescopic power unit (5) is installed on the installation plate (9). The telescopic power unit (5) is a cylinder, a hydraulic cylinder, an electric push rod, or a servo electric cylinder.
10. A multi-position water meter calibration system, characterized in that, Includes a water meter calibration converter (10) as described in any one of claims 1-9.
Citation Information
Patent Citations
Multi-meter-position water meter calibrating device
CN120489299A