A water meter shell pressure detection device

Abstract

The application discloses a water meter shell pressure resistance detection device and belongs to the field of hydraulic tests. The device comprises a seat body, a rotating disc connected to one side of the seat body, a clamping and positioning assembly connected to one side of the rotating disc, a constant pressure assembly and a detection assembly. The constant pressure assembly comprises two air cylinders II connected symmetrically to one side of the rotating disc, two pressure connection parts respectively fixed to the telescopic ends of the two air cylinders II and used for sealing and pressing the input end and the output end of the water meter shell. The detection assembly comprises two supports fixed to one side of the rotating disc, two pump bodies respectively fixed to one side of the two supports and two three-way joints connected to the two pressure connection parts and used for sending fluid into the water meter shell. The accumulator II can be pre-charged with pressure. When dynamic high pressure needs to be simulated, the servo valve I is opened, the pre-stored high-pressure water in the water cavity of the accumulator II is instantaneously released and injected into the main pipeline, a pressure shock wave is formed, and the scene that the water meter shell is subjected to transient high-pressure fluctuation in the use process is simulated.

Description

Technical Field

[0001] This invention relates to the field of hydraulic testing, and more specifically, to a water meter casing pressure resistance testing device. Background Technology

[0002] The water meter casing is the main external structure of the water meter and one of its most important components. It provides a safe and stable working environment for the meter's movement, preventing the internal measuring components from being damaged by external impacts, dust, dirt, etc. The water meter casing pressure resistance test is a crucial mandatory quality inspection, specifically designed to test whether the structural strength and sealing performance of the water meter casing meet the standards when subjected to pressures higher than normal operating conditions. The purpose is to ensure that the water meter will not crack or leak due to water pressure fluctuations or abnormally high pressures during actual use, thereby ensuring water supply safety and preventing property damage.

[0003] For water meter casing pressure resistance testing, liquid is usually introduced into the casing, and the difference in flow rate between the inlet and outlet creates water pressure to test the casing's pressure resistance. For example, a water meter casing pressure resistance testing device disclosed in the prior art (Chinese invention patent with announcement number CN107782632B) can perform pressure resistance testing on the water meter casing. However, this method can only perform conventional pressure resistance testing on the water meter casing, merely simulating an extreme working condition under static high pressure. The pressure in the water pipe is not constant, but fluctuates periodically within a certain range day and night. This long-term pressure cycle can cause fatigue to the metal material. The conventional pressure resistance test achieved by the existing testing device is a one-time static high-pressure test and cannot achieve dynamic high-pressure testing of the water meter casing. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a water meter casing pressure resistance testing device.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A water meter casing pressure resistance testing device includes a base, a turntable connected to one side of the base, a clamping and positioning component connected to one side of the turntable, a pressure-regulating component, and a testing component.

[0007] The pressure regulating component includes two cylinders symmetrically connected to one side of the turntable, and two pressing parts fixedly connected to the telescopic ends of the two cylinders respectively for sealing and pressing the input and output ends of the water meter casing.

[0008] The detection assembly includes two supports fixed to one side of the turntable, two pump bodies fixed to one side of the two supports respectively, two T-joints connected to two crimping parts for sending fluid into the water meter housing, two second sensors fixed to the other two interfaces of the two T-joints respectively, two second servo valves, two T-pipes connecting the two second servo valves to the two pump bodies, and accumulators one and two fixed to one side of the two supports respectively, with accumulators one and two connected to the two T-pipes respectively.

[0009] Furthermore, the crimping part includes two sensors 1 respectively fixed to the telescopic end of cylinder 2, two pressure plates 3 respectively fixed to the other side of the two sensors 1, two pressure plates 4 respectively fixed to the other side of the two pressure plates 3, two sealing gaskets respectively fixed to the other side of the two pressure plates 4, and a through hole opened at the center of the two pressure plates 4 and the two sealing gaskets. The two T-joints are respectively fixed to one side of the two pressure plates 4, and one of the interfaces of the two T-joints is connected to the through hole.

[0010] Furthermore, each of the two pressure plates four is respectively fixed to one side with two insertion parts that communicate with the through hole, and two sealing rings are respectively fixed to the outside of the two insertion parts; the output end of the accumulator two is connected to the three-way pipe through the servo valve one, and the energy storage end of the accumulator is connected to the three-way pipe.

[0011] Furthermore, it also includes two connecting components respectively set on the two pressure plates four, and the connecting components include a motor one fixed to one side of the pressure plate four, a gear one rotatably connected inside the pressure plate four and a gear two meshing with the gear one, a disc body rotatably connected to one side of the pressure plate four and fixed to one side of the gear two, and a threaded connector fixed to the other side of the disc body for connecting with the threaded opening of the water meter housing, and the output shaft of the motor one is connected to the gear one.

[0012] Furthermore, it also includes a flow simulation component, which includes a motor three fixed to the upper end of the base, a worm gear rotatably connected to the inside of the base, a worm rotatably connected to the inside of the base and driven by the worm gear, and a sensor three fixed to one side of the turntable. The turntable is rotatably connected to one side of the base and fixed to the worm gear, and the output shaft of the motor three is connected to the worm.

[0013] Furthermore, it also includes two axial loading assemblies symmetrically arranged on the turntable. The axial loading assembly includes a slide block one slidably connected inside the turntable, a lead screw one rotatably connected inside the turntable and screwed into the slide block one, a drive unit fixed to one side of the turntable for driving the lead screw one to rotate, a movable seat fixed to one side of the slide block one, a slide block two slidably connected to one side of the movable seat, a lead screw two rotatably connected inside the movable seat and screwed into the slide block two, and a motor two fixed to one side of the movable seat, with the output shaft of the motor two connected to the lead screw two. The two cylinders two are respectively fixed to one side of the two slide blocks two.

[0014] Furthermore, a positioning part is connected to one side of the turntable, and the positioning part includes a connecting rod fixed to one side of the turntable, an arc-shaped plate I fixed to the other end of the connecting rod, multiple screw rods II fixed to one side of the arc-shaped plate I, an arc-shaped plate II movably sleeved outside the multiple screw rods II, and multiple screw sleeves II respectively screwed to the outside of the multiple screw rods II.

[0015] Furthermore, the first and second arc-shaped plates come into contact with the outside of the water meter casing and position the water meter casing.

[0016] Furthermore, an ultrasonic generator is fixedly connected to one side of the turntable, and ultrasonic transducers are fixedly connected inside both the first and second arc-shaped plates, with the ultrasonic transducers connected to the ultrasonic generator.

[0017] Furthermore, the clamping and positioning assembly includes a cylinder one fixed to one side of the turntable, a pressure plate one fixed to the telescopic end of the cylinder one, a fixed seat fixed to one side of the turntable, a screw one fixed to one side of the fixed seat, a screw sleeve one screwed to the outside of the screw one, and a pressure plate two rotatably connected to one end of the screw sleeve one. The pressure plate one and the pressure plate two respectively contact the two sides of the water meter housing and apply pressure to the two sides of the water meter housing for positioning.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] (1) This solution is equipped with a detection component. The accumulator can be pre-charged with pressure. When it is necessary to simulate dynamic high pressure, the servo valve is opened and the high pressure water stored in the water chamber of the accumulator is released instantly and injected into the main pipeline to form a pressure shock wave, simulating the scenario of transient high pressure fluctuations in the water meter shell during use. At the same time, the pump body adopts a servo pump. According to the preset pressure waveform, the servo motor drives the plunger to move, slightly advancing forward to compress the water body to generate high pressure; slightly retreating backward to release pressure. With the precise opening of the servo valve, the system pressure is reduced. This process is repeated to generate a precise and controllable pressure cycle, simulating the scenario of dynamic water pressure fluctuations in the water meter shell during use. It can realize pressure resistance testing of the water meter shell under various pressure states.

[0020] (2) This scheme is equipped with a flow simulation component, which can drive the turntable to rotate through the worm gear and worm wheel transmission, thereby changing the water meter shell clamped on the turntable from a vertical state to a horizontal state; simulating the actual installation state of the water meter shell, returning to the real scene, and simulating the force most accurately; when placed horizontally, the transmission path and impact blind zone of transient high pressure wave and dynamic water pressure wave in the shell are different from those in the vertical state, ensuring that the test results can represent the real situation of actual use.

[0021] (3) This scheme is equipped with an axial loading component. The motor drives the screw two to rotate, the screw two drives the slide and cylinder two to move axially, and the cylinder two drives the two ends of the water meter shell to move through the constant pressure component to apply an outward pulling force to the two ends of the water meter shell, simulating the tension caused by the thermal expansion and contraction of the pipeline or the settlement of the foundation on the water meter interface; the drive unit drives the screw one to rotate, the screw one drives the slide one to move. Since the water meter shell is positioned by the positioning unit, when the two slides one move, a three-point bending effect can be formed to simulate the forced installation stress when the pipeline is not concentric; the fatigue resistance and leakage resistance of the inlet and outlet threads of the water meter shell and the transition area of ​​the connection with the shell under tension and forced installation stress can be tested. The pressure resistance of the water meter shell under tension and forced installation stress can also be tested.

[0022] (4) This solution is equipped with a positioning part, which can clamp and fix the water meter shell through the arc plate one and arc plate two. At the same time, the ultrasonic transducer on the arc plate one and arc plate two can act on the outside of the water meter shell. On the one hand, it can quickly discharge the air bubbles in the inner cavity when the water meter shell is vertical and its inner cavity is filled with water. On the other hand, it can detect the pressure resistance of the water meter shell when it is subjected to vibration. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0025] Figure 3 This is a schematic diagram of the axial loading component and constant pressure component of the present invention;

[0026] Figure 4 For the present invention Figure 2 Enlarged schematic diagram of the structure at point B;

[0027] Figure 5 This is a schematic diagram of the connection component structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the sealing gasket, insertion part, and sealing ring structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of gear one, gear two, and disk body of the present invention;

[0030] Figure 8 This is a schematic diagram of the clamping and positioning component and sensor structure of the present invention;

[0031] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point C;

[0032] Figure 10This is a schematic diagram of the worm gear and worm structure of the present invention.

[0033] Explanation of the labels in the diagram:

[0034] 1. Base; 2. Clamping and positioning assembly; 21. Cylinder 1; 22. Pressure plate 1; 23. Fixed base; 24. Screw 1; 25. Screw sleeve 1; 26. Pressure plate 2; 3. Constant pressure assembly; 31. Cylinder 2; 32. Sensor 1; 33. Pressure plate 3; 34. Pressure plate 4; 35. Sealing gasket; 36. Insertion part; 37. Sealing ring; 4. Detection assembly; 41. Support; 42. Pump body; 43. Accumulator 1; 44. Accumulator 2; 45. T-connector; 46. Servo valve 1; 47. T-connector; 48. Sensor 2; 49. Servo valve 2; 5. Connector Components: 51. Motor 1; 52. Gear 1; 53. Gear 2; 54. Disc; 55. Screwed connector; 6. Axial loading assembly; 61. Drive unit; 62. Lead screw 1; 63. Slide 1; 64. Moving seat; 65. Motor 2; 66. Lead screw 2; 67. Slide 2; 7. Flow simulation assembly; 71. Turntable; 72. Sensor 3; 73. Worm gear; 74. Worm; 75. Motor 3; 8. Positioning unit; 81. Ultrasonic generator; 82. Connecting rod; 83. Arc plate 1; 84. Screw 2; 85. Arc plate 2; 86. Screw sleeve 2. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] Please see Figures 1 to 10 A water meter casing pressure resistance testing device includes a base 1, a turntable 71 connected to one side of the base 1, a clamping and positioning component 2, a pressure fixing component 3, and a testing component 4 connected to one side of the turntable 71. The clamping and positioning component 2 includes a cylinder 21 fixed to one side of the turntable 71, a pressure plate 22 fixed to the telescopic end of the cylinder 21, a fixed seat 23 fixed to one side of the turntable 71, a screw 24 fixed to one side of the fixed seat 23, a screw sleeve 25 screwed to the outside of the screw 24, and a pressure plate 26 rotatably connected to one end of the screw sleeve 25. The pressure plate 22 and the pressure plate 26 respectively contact the two sides of the water meter casing and apply pressure to the two sides of the water meter casing for positioning.

[0037] The pressure regulating component 3 includes two cylinders 31 symmetrically connected to one side of the turntable 71, and two pressing parts fixedly connected to the telescopic ends of the two cylinders 31 respectively for sealing and pressing the input and output ends of the water meter casing.

[0038] The detection assembly 4 includes two supports 41 fixed to one side of the turntable 71, two pump bodies 42 respectively fixed to one side of the two supports 41, two T-joints 47 connected to two crimping parts for sending fluid into the water meter housing, two second sensors 48 respectively fixed to the other two interfaces of the two T-joints 47, two second servo valves 49, two T-pipes 45 connecting the two second servo valves 49 to the two pump bodies 42, and accumulators 43 and 44 respectively fixed to one side of the two supports 41, with accumulators 43 and 44 respectively connected to the two T-pipes 45.

[0039] The crimping part includes two sensors 32 fixedly attached to the telescopic end of cylinder 2 31, two pressure plates 33 fixedly attached to the other side of the two sensors 32, two pressure plates 34 fixedly attached to the other side of the two pressure plates 33, two sealing gaskets 35 fixedly attached to the other side of the two pressure plates 34, and a through hole opened at the center of the two pressure plates 34 and the two sealing gaskets 35. Two T-joints 47 are fixedly attached to one side of the two pressure plates 34, and one of the interfaces of the two T-joints 47 is connected to the through hole. In this application, the sensors 32 are pressure sensors used to detect the pressure applied by cylinder 2 31.

[0040] Two insertion parts 36 connected to the through holes are fixedly connected to one side of the two pressure plates 34 respectively, and two sealing rings 37 are fixedly connected to the outside of the two insertion parts 36 respectively; the output end of the accumulator 44 is connected to the three-way pipe 45 through the servo valve 46, and the energy storage end of the accumulator is connected to the three-way pipe 45.

[0041] It also includes two connecting components 5 respectively disposed on the two pressure plates 34. The connecting components 5 include a motor 51 fixedly connected to one side of the pressure plate 34, a gear 52 rotatably connected inside the pressure plate 34 and a gear 53 meshing with the gear 52, a disc body 54 rotatably connected to one side of the pressure plate 34 and fixedly connected to one side of the gear 53, and a threaded connector 55 fixedly connected to the other side of the disc body 54 for connecting with the threaded opening of the water meter housing. The output shaft of the motor 51 is connected to the gear 52.

[0042] By adopting the above technical solution, the water meter casing is vertically placed between two cylinders 31. The cylinders 31 extend, driving the pressure plate 34 to move towards both ends of the water meter casing. The screw connector 55 first contacts the threads on the outer surface of the water meter casing end. The motor 51 then drives gears 52 and 53 to rotate. The rotation of gear 53, through the disc 54, drives the screw connector 55 to rotate, allowing it to be screwed onto the external threads of the water meter casing end. Simultaneously, the insertion part... The insertion part 36 can be inserted into the water meter housing. The sealing ring 37 on the outside of the insertion part 36 contacts the inner surface of the end of the water meter housing to achieve a seal. The end of the water meter housing can also contact the sealing gasket 35 on one side of the pressure plate 34 to achieve a double seal, preventing liquid from leaking out of the end of the water meter housing during the test. Rotating the screw sleeve 25 causes the screw sleeve 25 to rotate outside the screw 24 and drive the pressure plate 26 to move towards the water meter housing, so that the pressure plate 26 can contact and support the water meter housing. This controls the extension of the cylinder 21. The pump moves the pressure plate 22 to the other side of the water meter housing, applying pressure to the other side of the water meter housing to complete the fixed installation of the water meter housing; then, one end of each of the two three-way pipes 45 is connected to one of the two servo valves 49 respectively. One of the pump bodies 42 pumps liquid into the three-way pipe 45. The liquid passes through the three-way pipe 45 and the servo valve 49 and enters the three-way connector 47, then enters the water meter housing. Simultaneously, the servo valve 49 on the other three-way connector 47 can be closed or opened. When one servo valve... When servo valve 2 49 is closed and another servo valve 2 49 is open, a static pressure test is performed by pumping liquid into the water meter housing. Sensor 2 48 can detect the water pressure in the pressure chamber of the water meter housing. When both servo valves 2 49 are open, the two sensors 2 48 detect the inlet pressure and the outlet pressure respectively. The difference between the two pressures forms a water pressure difference, which realizes the pressure resistance test of the water meter housing. The pressure resistance test of the water meter housing is a mature existing technology, and will not be described in detail here.

[0043] The accumulator 2 44 in this application is a piston-type accumulator. One end is a gas chamber connected to a compressed nitrogen cylinder and a precision pressure regulating valve for pre-charging pressure; the other end is a water chamber, which can also be pre-charged. The inlet of the water chamber is connected to the water supply tee pipe 45 via servo valve 1 46. During test intervals, the water chamber of accumulator 2 44 is filled with water, and the gas chamber is compressed to a preset high-pressure state. During the aforementioned pressure resistance test, when it is necessary to simulate dynamic high pressure, servo valve 1 46 is opened, and the high-pressure water pre-stored in the water chamber of accumulator 2 44 is instantly released and injected into the water supply tee pipe 45, forming a pressure shock wave to simulate the scenario of transient high-pressure fluctuations experienced by the water meter casing during use. At the same time, in this application, the pump body 42 is a servo pump, which adjusts according to the preset pressure waveform. The system controls a servo motor to drive a plunger, which advances slightly forward to compress the water and generate high pressure; it then retreats slightly to release the pressure. This, combined with the precise opening of servo valve 49, reduces system pressure. This cycle repeats, generating a precise and controllable pressure loop to simulate the dynamic water pressure fluctuations experienced by the water meter casing during use. This allows for pressure resistance testing of the water meter casing under various pressure conditions. Furthermore, in this application, the pump body 42 propels water forward at a constant high speed, pushing the water flow through the meter casing under test. The water flows out through servo valve 49, which is connected to the outlet of the water meter casing. When the flow rate reaches a set value, servo valve 49 at the outlet instantly closes, converting the fluid's kinetic energy into pressure potential energy and generating a shock wave within the casing. This method can also be used to perform water hammer impact pressure resistance testing on the water meter casing.

[0044] like Figure 1 and Figure 10 As shown, it also includes a flow simulation component 7, which includes a motor 75 fixed to the upper end of the base 1, a worm gear 73 rotatably connected inside the base 1, a worm 74 rotatably connected inside the base 1 and drivingly connected to the worm gear 73, and a sensor 72 fixed to one side of the turntable 71. The turntable 71 is rotatably connected to one side of the base 1 and fixed to the worm gear 73, and the output shaft of the motor 75 is connected to the worm 74.

[0045] By adopting the above technical solution, the motor 75 can drive the worm 74 to rotate, the worm 74 drives the worm wheel 73 to rotate, and the worm wheel 73 drives the turntable 71 to rotate, thereby changing the water meter casing clamped on the turntable 71 from a vertical state to a horizontal state; simulating the actual installation state of the water meter casing, returning to the real scenario, and simulating the force most accurately; when placed horizontally, the transmission path and impact blind zone of transient high-pressure waves and dynamic water pressure waves in the casing are different from those in the vertical state, ensuring that the test results can represent the real situation of actual use.

[0046] like Figure 3 and Figure 8As shown, it also includes two axial loading assemblies 6 symmetrically arranged on the turntable 71. The axial loading assembly 6 includes a slide block 63 slidably connected inside the turntable 71, a lead screw 62 rotatably connected inside the turntable 71 and screwed into the slide block 63, a drive unit 61 fixed to one side of the turntable 71 for driving the lead screw 62 to rotate, a movable seat 64 fixed to one side of the slide block 63, a slide block 67 slidably connected to one side of the movable seat 64, a lead screw 66 rotatably connected inside the movable seat 64 and screwed into the slide block 67, and a motor 65 fixed to one side of the movable seat 64, with the output shaft of the motor 65 connected to the lead screw 66. The two cylinders 31 are respectively fixed to one side of the two slide blocks 67.

[0047] By adopting the above technical solution, the motor 65 drives the lead screw 66 to rotate, the lead screw 66 drives the slide 67 and cylinder 31 to move axially, and the cylinder 31 drives the two ends of the water meter shell to move through the constant pressure component 3, applying an outward pulling force to the two ends of the water meter shell, simulating the tension caused by the thermal expansion and contraction of the pipeline or the settlement of the foundation on the water meter interface; the drive unit 61 drives the lead screw 62 to rotate, the lead screw 62 drives the slide 63 to move. Since the water meter shell is positioned by the positioning unit 8, when the two slides 63 move, a three-point bending effect can be formed, simulating the forced installation stress when the pipeline is not concentric; the fatigue resistance and leakage resistance of the inlet and outlet thread roots of the water meter shell and the connection transition area with the shell under tensile and forced installation stress can be tested, and the pressure resistance of the water meter shell under tensile and forced installation stress can also be tested.

[0048] like Figure 8 and Figure 9 As shown, a positioning part 8 is connected to one side of the turntable 71, and the positioning part 8 includes a connecting rod 82 fixed to one side of the turntable 71, an arc plate 83 fixed to the other end of the connecting rod 82, multiple screw rods 84 fixed to one side of the arc plate 83, an arc plate 85 movably sleeved outside the multiple screw rods 84, and multiple threaded sleeves 86 respectively screwed to the outside of the multiple screw rods 84.

[0049] The arc-shaped plate 83 and the arc-shaped plate 85 are in contact with the outside of the water meter casing and position the water meter casing.

[0050] An ultrasonic generator 81 is also fixedly connected to one side of the turntable 71. An ultrasonic transducer is fixedly connected inside both the first arc plate 83 and the second arc plate 85, and the ultrasonic transducer is connected to the ultrasonic generator 81.

[0051] By adopting the above technical solution, one side of the water meter casing is attached to the arc plate 83, the arc plate 85 is sleeved on the outside of the multiple screws 84, and the screw sleeve 86 is screwed on the outside of the screws 84 and limits the arc plate 85, so that the arc plate 85 presses the water meter casing tightly; the ultrasonic generator 81 can output a signal to the ultrasonic transducer to generate ultrasonic waves. The ultrasonic transducers on the arc plate 83 and the arc plate 85 can act on the outside of the water meter casing. On the one hand, it can quickly expel the air bubbles in the inner cavity when water enters the inner cavity of the water meter casing in a vertical state. On the other hand, it can detect the pressure resistance of the water meter casing when it is subjected to vibration.

[0052] Instructions for use: Place the water meter housing vertically between the two cylinders 31, ensuring one side of the housing aligns with the arc-shaped plate 83. Place the arc-shaped plate 85 over the multiple screws 84, and screw the sleeve 86 onto the screws 84, limiting the arc-shaped plate 85 and pressing it firmly against the water meter housing. Extend cylinder 31 to move pressure plate 34 towards both ends of the water meter housing. The screw connector 55 first contacts the threads on the outer surface of the water meter housing end. Then, control motor 51 to rotate gears 52 and 53. The rotation of gear 53, through the disc 54, rotates the screw connector 55, allowing it to be screwed onto the external threads of the water meter housing end. When the screw connector 55 is screwed onto the end of the water meter housing... The insertion part 36 on the external thread can be inserted into the water meter housing. The sealing ring 37 on the outside of the insertion part 36 contacts the inner surface of the end of the water meter housing to achieve a seal. The end of the water meter housing can also contact the sealing gasket 35 on one side of the pressure plate 34 to achieve a double seal. Rotating the screw sleeve 25 causes it to rotate outside the screw rod 24 and moves the pressure plate 26 towards the water meter housing, allowing it to contact and support the water meter housing. The control cylinder 21 extends and moves the pressure plate 22 towards the other side of the water meter housing, applying pressure to the other side of the housing to complete the fixed installation of the water meter housing. Then, one end of each of the two three-way pipes 45 is connected to one of the two servo valves 49, and through one of them... Pump body 42 pumps liquid into the three-way pipe 45. The liquid passes through the three-way pipe 45 and servo valve 49 before entering the three-way connector 47, and then into the water meter housing. Simultaneously, servo valve 49 on the other three-way connector 47 can be closed or opened. When one servo valve 49 is closed and the other is open, static pressure testing is performed by pumping liquid into the water meter housing. Sensor 48 detects the water pressure in the pressure chamber of the water meter housing. When both servo valves 49 are open, two sensors 48 detect the inlet pressure and outlet pressure respectively. The pressure difference between these two pressures forms a pressure differential, thus testing the pressure resistance of the water meter housing. The system is electrically... Machine 3 75 can drive worm 74 to rotate, worm 74 drives worm wheel 73 to rotate, and worm wheel 73 drives turntable 71 to rotate, thereby changing the water meter shell clamped on turntable 71 from a vertical state to a horizontal state; screw 2 66 drives slide 2 67 and cylinder 2 31 to move axially, and cylinder 2 31 drives the two ends of the water meter shell to move through the constant pressure component 3, applying an outward pulling force to the two ends of the water meter shell, simulating the tension caused by thermal expansion and contraction of the pipeline or foundation settlement on the water meter interface; drive 61 drives screw 1 62 to rotate, and screw 1 62 drives slide 1 63 to move. Since the water meter shell is positioned by positioning part 8, when the two slides 1 63 move, a three-point bending effect can be formed, simulating the forced installation stress when the pipeline is not concentric.

[0053] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A water meter casing pressure resistance testing device, comprising a base (1), a turntable (71) connected to one side of the base (1), a clamping and positioning assembly (2), a pressure regulating assembly (3), and a testing assembly (4) connected to one side of the turntable (71), characterized in that: The pressure regulating component (3) includes two cylinders (31) symmetrically connected to one side of the turntable (71), and two pressing parts fixed to the telescopic ends of the two cylinders (31) respectively for sealing and pressing the input and output ends of the water meter casing; The detection assembly (4) includes two supports (41) fixed to one side of the turntable (71), two pump bodies (42) fixed to one side of the two supports (41), two T-joints (47) connected to two crimping parts for sending fluid into the water meter housing, two second sensors (48) fixed to the other two interfaces of the two T-joints (47), two second servo valves (49), two T-pipes (45) connecting the two second servo valves (49) to the two pump bodies (42), and accumulator one (43) and accumulator two (44) fixed to one side of the two supports (41), and accumulator one (43) and accumulator two (44) respectively connected to the two T-pipes (45).

2. The water meter casing pressure resistance testing device according to claim 1, characterized in that: The crimping part includes two sensors (32) fixed to the telescopic end of cylinder 2 (31), two pressure plates (33) fixed to the other side of the two sensors (32), two pressure plates (34) fixed to the other side of the two pressure plates (33), two sealing gaskets (35) fixed to the other side of the two pressure plates (34), and a through hole opened at the center of the two pressure plates (34) and the two sealing gaskets (35). The two three-way connectors (47) are fixed to one side of the two pressure plates (34), and one of the interfaces of the two three-way connectors (47) is connected to the through hole.

3. The water meter casing pressure resistance testing device according to claim 2, characterized in that: Two insertion parts (36) connected to the through hole are fixedly connected to one side of the two pressure plates (34), and two sealing rings (37) are fixedly connected to the outside of the two insertion parts (36); the output end of the accumulator (44) is connected to the three-way pipe (45) through the servo valve (46), and the energy storage end of the accumulator (43) is connected to the three-way pipe (45).

4. The water meter casing pressure resistance testing device according to claim 3, characterized in that: It also includes two connecting components (5) respectively set on two pressure plates (34), and the connecting components (5) include a motor (51) fixed to one side of the pressure plate (34), a gear (52) rotatably connected inside the pressure plate (34) and a gear (53) meshing with the gear (52), a disc body (54) rotatably connected to one side of the pressure plate (34) and fixed to one side of the gear (53), and a threaded connector (55) fixed to the other side of the disc body (54) for connecting with the screw hole of the water meter housing, and the output shaft of the motor (51) is connected to the gear (52).

5. The water meter casing pressure resistance testing device according to claim 4, characterized in that: It also includes a flow simulation component (7), and the flow simulation component (7) includes a motor three (75) fixed to the upper end of the base (1), a worm wheel (73) rotatably connected inside the base (1), a worm (74) rotatably connected inside the base (1) and driven by the worm wheel (73), and a sensor three (72) fixed to one side of the turntable (71). The turntable (71) is rotatably connected to one side of the base (1) and fixed to the worm wheel (73). The output shaft of the motor three (75) is connected to the worm (74).

6. The water meter casing pressure resistance testing device according to claim 5, characterized in that: It also includes two axial loading assemblies (6) symmetrically arranged on the turntable (71). The axial loading assembly (6) includes a slide seat (63) slidably connected inside the turntable (71), a lead screw (62) rotatably connected inside the turntable (71) and screwed into the slide seat (63), a drive unit (61) fixed to one side of the turntable (71) for driving the lead screw (62) to rotate, a moving seat (64) fixed to one side of the slide seat (63), a slide seat (67) slidably connected to one side of the moving seat (64), a lead screw (66) rotatably connected inside the moving seat (64) and screwed into the slide seat (67), and a motor (65) fixed to one side of the moving seat (64). The output shaft of the motor (65) is connected to the lead screw (66), and the two cylinders (31) are respectively fixed to one side of the two slide seats (67).

7. The water meter casing pressure resistance testing device according to claim 6, characterized in that: The turntable (71) is connected to a positioning part (8) on one side, and the positioning part (8) includes a connecting rod (82) fixed to one side of the turntable (71), an arc plate (83) fixed to the other end of the connecting rod (82), multiple screw rods (84) fixed to one side of the arc plate (83), an arc plate (85) movably sleeved outside the multiple screw rods (84), and multiple screw sleeves (86) respectively screwed to the outside of the multiple screw rods (84).

8. The water meter casing pressure resistance testing device according to claim 7, characterized in that: The first arc plate (83) and the second arc plate (85) are in contact with the outside of the water meter casing and position the water meter casing.

9. A water meter casing pressure resistance testing device according to claim 8, characterized in that: An ultrasonic generator (81) is also fixedly connected to one side of the turntable (71). An ultrasonic transducer is fixedly connected inside both the first arc plate (83) and the second arc plate (85), and the ultrasonic transducer is connected to the ultrasonic generator (81).

10. A water meter casing pressure resistance testing device according to claim 9, characterized in that: The clamping and positioning assembly (2) includes a cylinder (21) fixed to one side of the turntable (71), a pressure plate (22) fixed to the telescopic end of the cylinder (21), a fixed seat (23) fixed to one side of the turntable (71), a screw (24) fixed to one side of the fixed seat (23), a screw sleeve (25) screwed to the outside of the screw (24), and a pressure plate (26) rotatably connected to one end of the screw sleeve (25). The pressure plate (22) and the pressure plate (26) respectively contact the two sides of the water meter housing and apply pressure to the two sides of the water meter housing for positioning.

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