A kind of remote water meter pressure resistance automatic detection device

Abstract

This invention relates to the field of water meter testing technology and discloses an automatic pressure resistance testing device for remote water meters, comprising: two side pressure blocks that simultaneously apply pressure to the water meter casing from both sides, each side pressure block having an arc-shaped surface that fits against the water meter casing on the side facing the casing; a perforation that penetrates the middle of the side pressure blocks and extends one end to the arc-shaped surface; and a side pressure column that slides through the perforation and has a conical end near the water meter casing. The side pressure column has a first state of engagement with the side pressure blocks and a second state of sliding engagement with the side pressure blocks. In the first state, the small end of the side pressure column is hidden in the perforation of the side pressure blocks, and the arc-shaped surface of the side pressure blocks applies pressure to the water meter casing. In the second state, the conical small end of the side pressure column applies pressure to the water meter casing. This invention, with its side pressure blocks and slidable conical side pressure column, enables surface pressure testing and point pressure testing. Combined with simultaneous pressure from both sides, it avoids force shift on one side of the water meter and allows for multi-form pressure resistance testing of the remote water meter casing, improving the comprehensiveness of water meter pressure resistance testing.

Description

Technical Field

[0001] This invention relates to the field of water meter testing technology, specifically to an automatic testing device for the pressure resistance of remote water meters. Background Technology

[0002] As a crucial terminal device in smart water management, remote water meters primarily serve to eliminate the need for traditional manual meter reading. They automatically collect, store, and remotely transmit water usage data, reducing manpower and disturbance to residents caused by manual meter reading. This ensures consistency between the mechanical meter readings and backend data, minimizing reading errors. Furthermore, they can promptly identify leaks and other malfunctions, providing reliable data support for water supply companies to conduct water usage statistics and pipeline leakage analysis. Their widespread application is of significant practical importance for improving the digital management level of the water supply industry, optimizing water supply operation efficiency, reducing water waste, enhancing residents' water billing experience, and promoting refined water management operations.

[0003] Traditional remote water meter casings preferably use copper locking rings, primarily because brass has excellent machinability, allowing for the production of high-precision internal threads that fit the meter casing threads. It is also less prone to stripping or chipping after repeated disassembly and assembly. Furthermore, brass has good toughness, producing slight elastic deformation during tightening to reliably press the glass against the sealing ring. Even with high torque, it is less likely to crack directly, protecting the meter glass. However, brass is susceptible to dezincification corrosion in high-salt environments. For such harsh conditions, stainless steel locking rings with stronger corrosion resistance are used. However, stainless steel is more difficult to process, more expensive, and has relatively lower toughness, requiring strict control of the tightening torque. Plastic locking rings are inexpensive but lack sufficient mechanical strength, making them suitable for low-pressure, small meters. Some remote water meter casings are made of new materials. These new material water meters need to withstand long-term use in different environments; therefore, their pressure resistance needs to be tested.

[0004] Traditional water meter pressure resistance testing devices test the pressure resistance of a water meter by clamping the meter casing and applying pressure through a pressure-applying structure. However, clamping the meter casing affects the detection of the clamped part, resulting in limited comprehensiveness of the pressure resistance test. A remote water meter pressure resistance testing device published by patent CN120102295B can detect the pressure resistance characteristics of the meter casing under different operating areas, enriching the testing methods. Through the multi-angle adjustment mechanism of the water meter, it achieves the effect of facilitating changes in the position of the water meter and enriching the detection points. However, the aforementioned testing device and existing technology have the following shortcomings: the force applied during water meter clamping and testing is unstable. Existing technologies mostly rely on the friction generated by the clamping force to hold the water meter surface. During the pressure application process, the water meter surface is prone to friction with the clamping structure, causing damage to the water meter surface and paint, resulting in a decrease in the water meter's anti-corrosion performance; the pressure test is applied on one side, and even with a braking structure, it is easy to cause changes in the water meter's position angle. Braking utilizes friction, and the pressure applied during the pressure test is relatively large and generates a large torque, which easily leads to changes in the water meter's position rather than the water meter casing material being stably stressed; the outer ring of the water meter casing is circular, and the pressure contact is unstable. Deviation in the water meter's position can easily cause collision accidents, making the pressure test risky; existing technologies cannot achieve both point pressure testing and surface pressure testing. Summary of the Invention

[0005] The purpose of this invention is to solve at least one of the problems in the prior art mentioned above, and to provide an automatic detection device for the pressure resistance of remote water meters.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An automatic pressure resistance testing device for remote water meters includes: Two side pressure blocks apply pressure to the water meter casing simultaneously from both sides, and the side pressure blocks have an arc-shaped surface that fits into the water meter casing on the side facing the water meter casing; A perforation is made, penetrating the middle of the side pressure block and extending to the arc-shaped surface at one end; The side pressure column is slidably inserted into the perforation and is tapered at the end near the water meter casing; The side pressure column has a first state of being engaged with the side pressure block and a second state of sliding engagement with the side pressure block; in the first state, the small end of the side pressure column is hidden in the perforation of the side pressure block, and the arc-shaped side pressure block applies pressure to the water meter casing; in the second state, the conical small end of the side pressure column applies pressure to the water meter casing.

[0007] Furthermore, an intermediate plate is connected to the end of the side pressure column away from the water meter casing, and a spring is connected between the intermediate plate and the side pressure block, the spring causing the tapered end of the side pressure column to be hidden in the perforation.

[0008] Furthermore, the intermediate plate is connected to locking pins with a T-shaped cross-section that are parallel to the side pressure pins at both ends. The side pressure block has an oil cavity, and the large end of the locking pin slides in the oil cavity. Both sides of the side pressure block are provided with oil storage boxes, and an oil passage is connected between the oil storage box and the corresponding oil cavity. An electromagnetic valve is provided at the connection between the outer end of the oil passage and the oil storage box.

[0009] Furthermore, when the electromagnetic valve is opened, the intermediate plate moves towards the water meter casing under external force, and the locking pin presses the oil in the oil chamber into the oil storage box, causing the side pressure column and the side pressure block to slide together to form the second state; in the state without external force, the spring causes the intermediate plate and the locking pin to move away from the water meter casing, the oil in the oil storage box enters the oil chamber, and the side pressure column is hidden in the perforation. At this time, the electromagnetic valve is closed, and the incompressible property of the oil is used to make the side pressure column and the side pressure block combine to form the first state.

[0010] Furthermore, each side of the intermediate plate away from the water meter casing is provided with a movable plate, and a first pressure sensor is provided between the lower part of the movable plate and the intermediate plate.

[0011] Furthermore, it also includes a rotating turntable that can be raised and lowered, with two movable plates that move synchronously in opposite directions on the lower side of the turntable; a support is provided on the lower side of the center of the turntable, and a column is provided on the lower side of the support, with a pressure plate connected to the lower end of the column to apply pressure to the water meter glass.

[0012] Furthermore, the support has an inverted U-shaped seat on its lower side, a worm gear is installed on the inner side of the lower part of the inverted U-shaped seat, and a worm gear that meshes with the worm gear and a motor that drives the worm gear to rotate are provided on the upper part of the inverted U-shaped seat. The column is connected to the worm gear.

[0013] Furthermore, a second pressure sensor is provided between the support and the inverted U-shaped seat; when pressure is applied to the outer ring side of the water meter casing, the worm gear rotates to make the column horizontal; when pressure is applied to the upper glass of the water meter casing, the column is vertical and the two side pressure blocks are in a state of being far apart from each other.

[0014] Furthermore, it also includes a platform, the center of which is provided with a vertically sliding and lifting support platform that supports the water meter. The upper side of the support platform has a concave surface that fits against the lower side of the water meter, and the concave surface has a cross groove that cooperates with the cross ribs on the lower side of the water meter. The upper side of the platform is provided with two synchronously moving opposite movable seats, and a positioning cone is inserted through the upper side of the movable seats. The positioning cone extends into the inner side of the pipe openings at both ends of the water meter and fits against the inner side of the pipe openings.

[0015] Furthermore, the positioning cone is a hollow tubular structure; it also includes a water tank, with an inlet hose and an outlet hose connected between the water tank and the two positioning cones respectively. A water pump that supplies water to the inlet hose is installed on the side of the water tank, and an overflow valve is provided on the outlet hose.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention features a side pressure block and a sliding conical side pressure column. By switching between the first and second states, surface pressure detection on the arc-shaped surface and point pressure detection at the conical end of the side pressure column can be achieved respectively. One device can handle three pressure modes: point, surface, and a combination of point and surface. With simultaneous pressure application from both sides, it avoids the force deviation on one side of the water meter and enables multi-form pressure resistance testing of the remote water meter casing, improving the comprehensiveness of water meter pressure resistance testing. The spring of this invention can keep the side pressure column hidden inside the perforation under normal conditions. The hydraulic locking mechanism is composed of a locking column, an oil chamber, an oil reservoir, an oil passage, and a solenoid valve. The large end of the locking column slides in the oil chamber. The locking and unlocking of the side pressure column is achieved by controlling the filling and releasing of oil, providing a stable mechanical locking basis for the first and second working states. It ensures the stable implementation of the surface pressure mode. The side pressure column is reset by the spring force. The structure is simple and reliable, and the state switching between point pressure and surface pressure modes can be completed quickly. When the electromagnetic valve of this invention is opened, the locking column squeezes the oil to unlock and switches to the second state of point pressure application; after the valve is closed, the incompressible property of the oil is used to lock the locking column, fix and hide the side pressure column, and stably maintain the first state of surface pressure application; when there is no external force, the spring automatically resets, the two working states are reliably switched, the locking stiffness is high, and the side pressure column will not move unexpectedly during the pressure application process, ensuring the accuracy of the detection pressure. This invention features a column and pressure plate with adjustable posture, which can apply pressure to the upper glass part of the water meter, realizing integrated detection of multiple parts of the meter casing and glass; the motor-driven worm gear mechanism can drive the column to complete the posture rotation, with smooth transmission and self-locking capability, and can reliably switch the column to a horizontal or vertical posture, respectively adapting to the side pressure detection of the meter casing and the pressure detection of the water meter glass. The concave surface and cross groove of the support platform of this invention match the bottom shape and cross rib of the water meter to achieve bottom positioning; the positioning cones on both sides move in opposite directions and extend into the inner side of the pipe openings at both ends of the water meter for internal support positioning. This method abandons the traditional method of fixing the water meter by clamping friction, does not wear the paint surface of the water meter shell, the water meter is firmly positioned, and it is not easy to rotate or misalign when pressure is applied, and the clamping efficiency is high. This invention employs a hollow tubular positioning cone combined with a water tank, water pump, and overflow valve to form a water system that can introduce pressurized water into the water meter. While the external mechanism applies mechanical pressure to the water meter housing and glass, the water meter is also subjected to water pressure inside, which can detect whether there is any leakage when the water meter is pressurized and verify the water meter's pressure resistance performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the cabinet-less and water tank-less state of the present invention.

[0019] Figure 3This is a schematic diagram of the water meter support and pressure application structure from the top view of the present invention.

[0020] Figure 4 This is a schematic diagram of the water meter support and pressure application structure from the lower side of the present invention.

[0021] Figure 5 This is a schematic diagram of the lower side of the platform of the present invention.

[0022] Figure 6 This is a schematic diagram of the water meter support and fixing structure of the present invention.

[0023] Figure 7 This is a top-view schematic diagram of the water meter and its supporting structure separated in the present invention.

[0024] Figure 8 This is a side view diagram of the water meter and its supporting structure separated in the present invention.

[0025] Figure 9 This is a side view of the pressure-applying structure of the present invention.

[0026] Figure 10 This is a first-view perspective three-dimensional schematic diagram of the pressure application structure of the present invention.

[0027] Figure 11 This is a second-view perspective three-dimensional schematic diagram of the pressure-applying structure of the present invention.

[0028] Figure 12 This is a schematic diagram of the internal structure of the side pressure block of the present invention.

[0029] Figure 13 This is a schematic diagram of the internal water supply system of the present invention.

[0030] In the diagram: 1. Side pressure block; 2. Arc-shaped surface; 3. Perforation; 4. Side pressure column; 5. Middle plate; 6. Spring; 7. Locking column; 8. Oil chamber; 9. Oil reservoir; 10. Oil passage; 11. Solenoid valve; 12. Movable plate; 13. First pressure sensor; 14. Turntable; 15. Lateral guide rod; 16. Second hydraulic cylinder; 17. Rotary plate; 18. First connecting rod; 19. Support; 20. Inverted U-shaped seat; 21. Worm gear; 22. Worm; 23. Motor; 24. Column; 25. Pressure plate; 26. Second pressure sensor; 27. Cabinet; 28. Platform; 29. ​​Support platform; 30. 31. Concave surface; 32. Cross groove; 33. Third hydraulic cylinder; 34. Movable seat; 35. Positioning cone; 36. Rubber sealing ring; 37. Slide seat; 38. Fourth hydraulic cylinder; 39. Rotary ring; 40. Second connecting rod; 41. First strip hole; 42. Slide rail; 43. Ring seat; 44. Second strip hole; 45. Lifting platform; 46. Vertical guide rod; 47. First hydraulic cylinder; 48. Water tank; 49. Water pump; 50. Inlet hose; 51. Outlet hose; 52. Overflow valve; 53. First return pipe; 54. Second return pipe; 55. First shut-off valve; 56. Second shut-off valve. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention; that is, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Specific embodiments of the remote water meter pressure resistance automatic detection device provided by the present invention: Please refer to the attached document. Figures 1-13 The remote water meter pressure resistance automatic detection device includes a cabinet 27, with a platform 28 fixedly installed in the middle of the cabinet 27. The platform 28 divides the cabinet 27 into an upper cabinet and a lower cabinet. Both the upper and lower cabinets are equipped with cabinet doors. The upper cabinet is a transparent cabinet, which allows operators to directly observe the water meter's detection status.

[0033] A first hydraulic cylinder 46 is installed at the top of the cabinet 27. The output end of the first hydraulic cylinder 46 is connected downward to the lifting platform 44. Four vertical guide rods 45 are set on the upper side of the platform 28. The four vertical guide rods 45 slide through the four corners of the lifting platform 44 to guide and constrain the lifting movement of the lifting platform 44, ensuring that the lifting platform 44 moves vertically and smoothly up and down. A rotatable turntable 14 is installed on the lower side of the lifting platform 44. The turntable 14 can not only follow the lifting platform 44 to complete the lifting action, but also can rotate independently to adjust the circumferential detection position of the pressure application. The rotatable turntable 14 is existing technology and is not an improvement point of this embodiment. Therefore, its driving structure will not be described in detail in this embodiment.

[0034] Two transverse guide rods 15 are mounted on the lower side of the turntable 14, and two movable plates 12 slide through the two transverse guide rods 15. A second hydraulic cylinder 16 and a rotary plate 17 are also installed on the lower side of the turntable 14. The rotary plate 17 uses its own center as the fulcrum for rotation. The two ends of the rotary plate 17 are respectively hinged to the first connecting rods 18, and the other ends of the two first connecting rods 18 are respectively hinged to the two movable plates 12.

[0035] The output end of the second hydraulic cylinder 16 is connected to one of the movable plates 12 by bolts. When the second hydraulic cylinder 16 drives the corresponding movable plate 12 to move laterally, with the help of the transmission action of the rotary plate 17 and the two first connecting rods 18, the two movable plates 12 are driven to move laterally in opposite directions synchronously.

[0036] Each movable plate 12 is provided with a first pressure sensor 13 on the lower inner side, and a middle plate 5 is attached to the inner side of the first pressure sensor 13; the side pressure column 4 is connected to the side of the middle plate 5 near the water meter, and a spring 6 is sleeved on the outside of the side pressure column 4, with the two ends of the spring 6 abutting between the middle plate 5 and the side pressure block 1 respectively.

[0037] The side pressure block 1 has an arc-shaped surface 2 facing the water meter casing. The arc-shaped surface 2 fits and conforms to the outer circular outline of the water meter casing. A through hole 3 is opened in the middle of the side pressure block 1. One end of the through hole 3 extends to the arc-shaped surface 2. The side pressure column 4 is slidably assembled inside the through hole 3. The end of the side pressure column 4 near the water meter casing is processed into a conical structure.

[0038] A locking pin 7 is connected to each of the left and right ends of the intermediate plate 5. The cross-section of the locking pin 7 is T-shaped. The locking pin 7 and the side pressure pin 4 are parallel to each other. The side pressure block 1 has symmetrically opened oil chambers 8. The large end of the locking pin 7 is slidably sealed inside the oil chamber 8. A sealing ring is set on the outer ring side of the large end of the locking pin 7 to seal the oil. The large end of the locking pin 7 has the same function as a piston, while the oil chamber 8 is a piston chamber. The two sides of the large end of the locking pin 7 are the oil-free side and the oil-containing side, respectively. The oil-free end of the oil chamber 8 has an air hole that communicates with the outside.

[0039] Oil storage boxes 9 are provided on both the left and right sides of the side pressure block 1. An air hole is opened at the upper end of the oil storage box 9 to connect with the atmosphere. The bottom of the oil storage box 9 is connected to the oil chamber 8 on the corresponding side through the oil passage 10. A solenoid valve 11 is installed at the position where the oil passage 10 connects with the oil storage box 9.

[0040] When the solenoid valve 11 is opened, the second hydraulic cylinder 16 drives the movable plate 12 and the intermediate plate 5 to move towards the water meter casing. The large end of the T-shaped locking column 7 will squeeze the hydraulic oil inside the oil chamber 8. The hydraulic oil inside the oil chamber 8 is pressed into the oil storage box 9 through the oil passage 10 and the opened solenoid valve 11. At this time, the side pressure column 4 can slide relative to the side pressure block 1. The small conical end of the side pressure column 4 extends out from the perforation 3, forming the second state, realizing point pressure on the water meter casing. At this time, the side pressure block 1 is only in contact with the water meter under the action of the spring 6, applying a weak elastic force to the outside of the water meter. The pressure detection is mainly provided by the side pressure column 4.

[0041] After the external driving force is removed, spring 6 pushes the intermediate plate 5 and locking pin 7 to move away from the water meter casing to reset. The hydraulic oil inside the oil reservoir 9 flows back into the oil chamber 8, and the conical end of the side pressure pin 4 retracts and hides inside the perforation 3. Then, the solenoid valve 11 is closed, and the locking pin 7 is locked by the incompressible property of the oil, so that the side pressure pin 4 and the side pressure block 1 form a rigid connection in the first state. At this time, the water meter is pressurized for detection. The arc-shaped surface 2 of the side pressure block 1 is directly attached to the water meter casing, which can complete the surface pressure operation. The first pressure sensor 13 collects the pressure value during the pressurization process for monitoring and detecting the pressure magnitude.

[0042] A support 19 is provided on the lower side of the center of the turntable 14. An inverted U-shaped seat 20 is connected to the lower side of the support 19. A second pressure sensor 26 is installed between the support 19 and the inverted U-shaped seat 20. The rotary plate 17 is supported and rotated by the lower part of the support 19.

[0043] A worm gear 21 is rotatably mounted on the lower inner side of the inverted U-shaped seat 20, and a worm 22 is rotatably mounted on the upper part of the inverted U-shaped seat 20. The worm 22 and the worm gear 21 mesh with each other. A motor 23 is installed on the upper outer side of the inverted U-shaped seat 20, and the output shaft of the motor 23 is connected to the worm 22 for transmission. The worm gear 21 rotates vertically, and a column 24 is connected to the outer ring side of the worm gear 21. A pressure plate 25 is connected to the lower end of the column 24. A thin soft pad is pasted on the lower surface of the pressure plate 25 to prevent the pressure plate 25 from directly applying pressure and damaging the surface of the water meter glass.

[0044] Motor 23 drives worm gear 22 to rotate, which in turn drives worm wheel 21 to rotate, enabling the column 24 to switch its posture: when performing pressure resistance testing on the outer ring side of the water meter casing, the rotation of worm wheel 21 rotates the column 24 to a horizontal posture, preventing the column 24 and pressure plate 25 from interfering with the operation of the side pressure mechanism; when it is necessary to test the pressure resistance performance of the upper glass of the water meter, worm wheel 21 drives the column 24 to rotate to a vertically downward posture, while the two side pressure blocks 1 move to positions away from each other, and the pressure plate 25 applies pressure downward to the water meter glass under the action of lifting platform 44 and turntable 14, and the second pressure sensor 26 collects the pressure data of the glass.

[0045] A vertically sliding support platform 29 is installed at the center of the platform 28. A bracket is installed inside the lower cabinet of the cabinet 27. A third hydraulic cylinder 32 is installed on the bracket. The output end of the third hydraulic cylinder 32 is connected to the support platform 29 by bolts. The third hydraulic cylinder 32 drives the support platform 29 to move vertically up and down. A concave surface 30 is opened on the upper surface of the support platform 29. The outline of the concave surface 30 matches the shape of the lower side of the water meter housing. A cross groove 31 is opened inside the concave surface 30. The cross groove 31 is used to align and engage with the cross rib at the bottom of the water meter to achieve bottom positioning of the water meter.

[0046] Two first strip-shaped holes 40 are symmetrically opened on the platform 28. Slide rails 41 are provided on both sides of the first strip-shaped holes 40 on the upper and lower surfaces of the platform 28. A slide seat 36 is inserted inside each first strip-shaped hole 40, and the slide seat 36 slides in cooperation with the slide rail 41. An annular seat 42 is assembled at the lower center of the platform 28. A rotating ring 38 is rotatably assembled inside the annular seat 42. The annular seat 42 and the rotating ring 38 are arranged around the outer periphery of the support platform 29 with gaps.

[0047] A second connecting rod 39 is hinged between the rotating ring 38 and each of the two side slides 36, and the two second connecting rods 39 are arranged symmetrically about the center of the rotating ring 38. A fourth hydraulic cylinder 37 is also installed on the underside of the platform 28, and the output end of the fourth hydraulic cylinder 37 is bolted to one of the slides 36. The fourth hydraulic cylinder 37 drives one side slide 36 to translate, and through the transmission of the rotating ring 38 and the second connecting rod 39, drives the two side slides 36 to slide synchronously in opposite directions along the slide rail 41.

[0048] A movable seat 33 is bolted to the upper side of the slide 36, and a positioning cone 34 passes through the movable seat 33. The positioning cone 34 is tapered with an inner hole only at the end near the water meter; the rest of the main body is a hollow tubular cylindrical structure. A rubber sealing ring 35 is fitted on the side of the movable seat 33 facing the water meter pipe opening. When the slide 36 moves the movable seat 33 closer to the water meter pipe opening, the tapered end of the positioning cone 34 first extends into the pipe openings at both ends of the water meter, and then the cylindrical section extends into the inside of the pipe opening and fits against the inside of the pipe opening, achieving internal support positioning. The rubber sealing ring 35 is pressed tightly against the end face of the water meter pipe opening, achieving external sealing of the pipe opening. This method abandons the traditional friction clamping fixing method, does not wear the paint surface of the water meter casing, is firmly clamped, and the water meter will not deflect or misalign during the pressure application process.

[0049] Inside the lower cabinet of the cabinet 27, a water tank 47 and a water pump 48 are arranged; several second strip-shaped holes 43 are opened on the platform 28; the water inlet of the water pump 48 is connected to the water tank 47, and the water outlet of the water pump 48 is connected to the water inlet hose 49. The water inlet hose 49 passes through the second strip-shaped holes 43 and is connected to one side of the hollow tubular positioning cone 34; the other side of the positioning cone 34 is connected to the water outlet hose 50. The water outlet hose 50 passes downward through the second strip-shaped holes 43, and an overflow valve 51 is installed on the water outlet hose 50.

[0050] A first return pipe 52 is installed between the upper part of the inlet hose 49 and the water tank 47. The outlet hose 50 is connected to the second return pipe 53 upstream of the overflow valve 51. The lower end of the second return pipe 53 is connected to the water tank 47. A first shut-off valve 54 and a second shut-off valve 55 are respectively installed on the first return pipe 52 and the second return pipe 53. When the water meter is pressurized for testing, the internal water is pressurized and the shut-off valves are closed. After the test is completed, the water pump 48 stops working and the shut-off valves open, so that the water in the water meter flows back through the first return pipe 52 and the second return pipe 53 respectively. After emptying the water meter, the water meter is removed.

[0051] The testing process for this device is as follows: First, the remote water meter to be tested is placed on the concave surface 30 of the support platform 29, so that the cross rib at the bottom of the water meter is inserted into the cross groove 31 to complete the bottom positioning; the fourth hydraulic cylinder 37 drives the two side slides 36 to move towards each other, and the positioning cone 34 is inserted into the inside of the pipe openings at both ends of the water meter to complete the internal support positioning, and the rubber sealing ring 35 presses the pipe opening end face to achieve water circuit sealing; the third hydraulic cylinder 32 drives the support platform 29 to lift, so that the lower side of the water meter is lifted and closely fits the concave surface 30; Water pressure holding stage: Close the first shut-off valve 54 and the second shut-off valve 55, start the water pump 48, and the water inside the water tank 47 is filled into the water meter cavity through the water pump 48, the inlet hose 49, and the positioning cone 34 on one side. The air and excess medium inside the water meter flow to the overflow valve 51 through the positioning cone 34 on the other side and the outlet hose 50. The overflow valve 51 is set with the corresponding internal test water pressure. If the pressure exceeds the set pressure, the medium overflows, thereby maintaining a constant water pressure inside the water meter and simulating the actual pressurized working condition of the water meter. Mode 1: Surface pressure resistance test. Electromagnetic valve 11 is closed, locking the oil inside oil chamber 8. Side pressure column 4 remains hidden inside perforation 3, rigidly connected to side pressure block 1. Second hydraulic cylinder 16 drives two movable plates 12 to move synchronously towards each other. The arc-shaped surfaces 2 of the side pressure blocks 1 simultaneously adhere to the water meter casing, applying large-area surface pressure to both sides of the water meter casing. First pressure sensor 13 collects the applied pressure in real time. Turntable 14 can rotate, causing the side pressure blocks 1 to change the pressure points around the water meter's outer circumference. Lifting platform 44 can lift and lower turntable 14, changing the axial height of the pressure application, thus achieving surface pressure resistance testing at different heights and circumferential positions of the water meter casing. During the test, it is observed whether water leakage occurs in the water meter casing. Mode 2: Point-based pressure resistance test; The solenoid valve 11 is opened, the second hydraulic cylinder 16 continues to feed, the intermediate plate 5 pushes the locking column 7 to squeeze a small amount of hydraulic oil into the oil storage box 9 inside the oil chamber 8, the side pressure column 4 slides slightly relative to the side pressure block 1, the conical small end protrudes through the perforation 3, and the conical small ends of the side pressure columns 4 on both sides simultaneously apply pressure to the water meter casing, completing the local point-based pressure resistance test; the point-based pressure position can also be adjusted by rotating the turntable 14 and raising and lowering the lifting platform 44. Mode 3: Pressure resistance test combining point pressure and surface pressure; the side pressure blocks 1 and side pressure columns 4 on both sides of the water meter are in the first state and the second state respectively, so that one side of the water meter is supported by the arc surface 2 of the side pressure block 1, and the other side of the water meter is subjected to point pressure by the side pressure column 4. The water meter is clamped on both sides to achieve stable single-side point pressure test. Mode 4: Water meter glass pressure resistance test. Move the two side pressure blocks 1 to a position where they are far apart. The motor 23 drives the worm gear 22 and worm wheel 21 mechanism to rotate the column 24 to a vertical downward position. The lifting platform 44 drives the pressure plate 25 to press down. The thin soft pad of the pressure plate 25 presses the water meter glass tightly. The second pressure sensor 26 feeds back the pressure applied to the glass part to complete the water meter glass pressure resistance test.

[0052] After all the tests are completed, the water pump 48 stops working, the first shut-off valve 54 and the second shut-off valve 55 are opened, and the water inside the water meter flows back to the water tank 47 through the first return pipe 52 and the second return pipe 53 respectively; the two side pressure blocks 1 move away from each other, the lifting platform 44 and the turntable 14 rise; the fourth hydraulic cylinder 37 drives the two side movable seats 33 to move away from each other, and the positioning cone 34 exits the water meter pipe opening; the operator can then take out the water meter that has been tested.

[0053] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic pressure resistance testing device for remote water meters, characterized in that, include: Two side pressure blocks (1) apply pressure to the water meter casing from both sides simultaneously. The side pressure block (1) has an arc-shaped surface (2) that fits against the water meter casing on the side facing the water meter casing. A perforation (3) is made through the middle of the side pressure block (1) and extends to the arc-shaped surface (2) at one end. The side pressure column (4) is slidably inserted into the perforation (3) and is tapered at the end near the water meter casing; The side pressure column (4) has a first state of being engaged with the side pressure block (1) and a second state of sliding engagement with the side pressure block (1); in the first state, the small end of the side pressure column (4) is hidden in the perforation (3) of the side pressure block (1), and the arc-shaped surface (2) of the side pressure block (1) applies pressure to the water meter casing; in the second state, the conical small end of the side pressure column (4) applies pressure to the water meter casing.

2. The automatic pressure resistance testing device for remote water meters according to claim 1, characterized in that, The side pressure column (4) is connected to an intermediate plate (5) at the end away from the water meter casing. A spring (6) is connected between the intermediate plate (5) and the side pressure block (1). The spring (6) hides the tapered end of the side pressure column (4) in the perforation (3).

3. The automatic pressure resistance testing device for remote water meters according to claim 2, characterized in that, The intermediate plate (5) is connected to two ends of a locking post (7) with a T-shaped cross section and parallel to the side pressure post (4). The side pressure block (1) is provided with an oil cavity (8). The large end of the locking post (7) slides in the oil cavity (8). Both sides of the side pressure block (1) are provided with oil storage boxes (9). The oil storage box (9) is connected to the corresponding oil cavity (8) by an oil passage (10). The outer end of the oil passage (10) is connected to the oil storage box (9) by an electromagnetic valve (11).

4. The automatic pressure resistance testing device for remote water meters according to claim 3, characterized in that, When the electromagnetic valve (11) is opened, the intermediate plate (5) moves towards the water meter casing under external force, and the locking column (7) presses the oil in the oil chamber (8) into the oil storage box (9) so that the side pressure column (4) and the side pressure block (1) slide together to form the second state; in the state without external force, the spring (6) moves the intermediate plate (5) and the locking column (7) away from the water meter casing, and the oil in the oil storage box (9) enters the oil chamber (8). The side pressure column (4) is hidden in the perforation (3). At this time, the electromagnetic valve (11) is closed. The incompressible property of the oil makes the side pressure column (4) and the side pressure block (1) combine to form the first state.

5. The automatic pressure resistance testing device for remote water meters according to claim 2, characterized in that, Each of the intermediate plates (5) is provided with a movable plate (12) on the side away from the water meter casing, and a first pressure sensor (13) is provided between the lower part of the movable plate (12) and the intermediate plate (5).

6. The automatic pressure resistance testing device for remote water meters according to claim 5, characterized in that, It also includes a rotating turntable (14) that can be raised and lowered, with two movable plates (12) that move synchronously in opposite directions on the lower side of the turntable (14); a support (19) is provided on the lower side of the center of the turntable (14), and a column (24) is provided on the lower side of the support (19), with a pressure plate (25) connected to the lower end of the column (24) to apply pressure to the water meter glass.

7. The automatic pressure resistance testing device for remote water meters according to claim 6, characterized in that, The support (19) is provided with an inverted U-shaped seat (20) on the lower side. A worm wheel (21) is installed on the inner side of the lower part of the inverted U-shaped seat (20). The upper part of the inverted U-shaped seat (20) is provided with a worm (22) that meshes with the worm wheel (21) and a motor (23) that drives the worm (22) to rotate. The column (24) is connected to the worm wheel (21).

8. The automatic pressure resistance testing device for remote water meters according to claim 7, characterized in that, A second pressure sensor (26) is provided between the support (19) and the inverted U-shaped seat (20); when pressure is applied to the outer ring side of the water meter casing, the worm gear (21) rotates to make the column (24) horizontal; when pressure is applied to the upper glass of the water meter casing, the column (24) is vertical and the two side pressure blocks (1) are in a state of being far apart from each other.

9. The automatic pressure resistance testing device for remote water meters according to claim 1, characterized in that, It also includes a platform (28), the center of which is provided with a vertically sliding and lifting support platform (29), the support platform (29) supports the water meter, the upper side of the support platform (29) has a concave surface (30) that fits against the lower side of the water meter, the concave surface (30) is provided with a cross groove (31) that cooperates with the cross ribs on the lower side of the water meter; the upper side of the platform (28) is provided with two synchronously opposite moving movable seats (33), the upper side of the movable seats (33) is provided with a positioning cone (34), the positioning cone (34) extends into the inner side of the pipe openings at both ends of the water meter and fits against the inner side of the pipe openings.

10. The automatic pressure resistance testing device for remote water meters according to claim 9, characterized in that, The positioning cone (34) is a hollow tubular structure; it also includes a water tank (47), with an inlet hose (49) and an outlet hose (50) respectively connected between the water tank (47) and the two positioning cones (34). A water pump (48) is installed on the side of the water tank (47) to supply water to the inlet hose (49), and an overflow valve (51) is provided on the outlet hose (50).

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