Water meter precision testing equipment

Abstract

The invention belongs to the technical field of testing, and particularly relates to water meter accuracy testing equipment which comprises a shell fixedly connected to the tops of bottom legs, a water storage tank is clamped to the bottom of an inner cavity of the shell, and a scraping assembly is installed in the water storage tank and used for cleaning water scale contained in water. And the top of the water storage tank is fixedly connected with a flow guide pipeline. According to the water meter precision testing equipment, when the first rotating disc is twisted, the vertical rod and the second rotating disc are linked to synchronously rotate, the vertical rod rotates to drive an eccentric protruding block and a clamping hoop on the outer surface to move, so that after the clamping hoop rotates, deflection force is formed, the deflection force of the clamping hoop extrudes a water meter, the twisting disc deflects and moves in a limiting piece, and the water meter precision is tested. The water meter is gradually clamped and fixed, so that the function of improving the stability is achieved, water leakage caused by the fact that the tightness degree of the connecting position is reduced after long-time use is avoided, and the precision of equipment is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of testing, and more specifically, it is a water meter accuracy testing device. Background Art

[0002] We live in a world with limited resources. In the face of the increasingly scarce water resources, the importance of saving water has become even more obvious. In the process of realizing the efficient utilization and conservation of water resources, various water meter detections are particularly crucial. The water meter detection report plays a decisive role in the interpretation and analysis of water meter data for the effective utilization of water resources and the reasonable calculation of water fees.

[0003] When testing the accuracy of a water meter, sometimes due to the aging of the water meter and loose connections at the joints, there will be a situation of minor water leakage. During the test, the accuracy test of the water meter will be inaccurate, and it is necessary to tighten it again before retesting, which is relatively troublesome and has certain limitations. Therefore, the present invention provides a water meter accuracy testing device to solve the above problems. Summary of the Invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems proposed in the background art.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: A water meter accuracy testing device of the present invention includes a housing fixedly connected to the top of a bottom leg. A water storage tank is snap-connected to the bottom of the inner cavity of the housing. A scraping component is installed inside the water storage tank, and the scraping component is used to clean the scale contained in the water to reduce the influence of scale on the accuracy test of the water meter. A diversion pipe is fixedly connected to the top of the water storage tank. A water pump is provided inside the diversion pipe for discharging water. A separation component is installed inside the diversion pipe, and the separation component prevents the scale from being incorporated into the water that needs to be tested for accuracy in the separated state. A camera is installed on the top of the housing, and the camera is used to take pictures of the index of the water meter test. A sliding plate is slidably connected to the upper surface of the housing. An adjustable distance component is installed at the bottom of the sliding plate. A water meter is arranged in the middle of the adjustable distance component. A main shaft is rotatably connected inside the water meter. A impeller is installed on the outer surface of the main shaft. The adjustable distance component is used to adjust the installation position of the water meter in a general way. A conduit is inserted into the end side of the housing.

[0006] Furthermore, the scraping assembly includes a scraper installed inside a water tank, the water tank is arranged at an angle, the scraper consists of two horizontal plates and a vertical plate, an elastic member is fixedly connected to the top of the scraper, a clamping block is fixedly connected to the inner wall of the vertical plate of the scraper, a rotating rod is rotatably connected inside the clamping block, a deflection block is fixedly connected to the outer surface of the rotating rod, a baffle is fixedly connected to the bottom of the deflection block, a slider is fixedly connected to the top of the scraper, the top wall and the bottom wall of the water tank are both provided with slide rails compatible with the slider, and a guide bar is fixedly connected in the middle of the slide rails.

[0007] Furthermore, the scraper is in a U-shape, a hole is provided in the middle of the vertical plate of the scraper, the diameter of the baffle is larger than the diameter of the hole, and the elastic member is made of rubber.

[0008] Furthermore, a descaling component is installed inside the scraper, and the descaling component is used to treat scale grown on the top wall and the bottom wall of the scraper. The descaling component includes an extension plate, and the two cross plates of the scraper are fixedly connected to the extension plate. An electric telescopic cylinder is installed below the end of the extension plate, and the inner side wall of the electric telescopic cylinder is telescopically connected to the telescopic plate. Two blocking blocks are installed inside the water tank; the telescopic plate is in contact with the inner wall of the scraper, and the height of the blocking block is flush with the height of the electric telescopic cylinder.

[0009] Furthermore, the distance adjustment component includes a moving block installed at the bottom of the skateboard, guide blocks are arranged at the bottom of both sides of the skateboard, a screw is threadedly transmitted inside the guide block, and one end of the screw is externally connected to a servo motor, a fixed frame is fixedly connected to the outside of the moving block, two support rods are fixedly connected to the end of the fixed frame, a clamp shell is installed between the support rods, a support tube is arranged inside the clamp shell, the support tube is used to support the clamp shell, a through pipe is installed at the bottom of the clamp shell, a weighing scale is installed at the bottom of the water tank, the weighing scale is used to weigh water, a capsule is installed on the top of the through pipe, a spray column is installed on the side of the capsule, the capsule and the spray column cooperate to improve water quality, and the inside of the clamp shell and the support tube are hollow.

[0010] Furthermore, a clamping assembly is provided inside the clamp shell, and the clamping assembly is used to clamp the water meter. The clamping assembly includes a turntable 1 and a turntable 2 rotatably connected to the inside of the clamp shell, a vertical pole is fixedly connected between the turntable 1 and the turntable 2, an eccentric protrusion is rotatably connected to the outer surface of the vertical pole, a torsion plate and a clamp are provided on the outer surface of the eccentric protrusion, a plurality of limit members are rotatably connected to the end of the torsion plate, a toggle rod is fixedly connected to the inner side wall of the turntable 1, and the top of the toggle rod passes through the interior of the clamp shell.

[0011] Furthermore, a rotation groove matched with the toggle rod is provided on the outer surface of the clamp shell.

[0012] Furthermore, a plurality of anti-slip strips are arranged inside the clamp, and the specifications and dimensions of the turntable 1 and the turntable 2 are the same.

[0013] Furthermore, the separation assembly includes a filter plate installed at the bottom of the guide pipe, the middle part of the filter plate is rotatably connected to a central axis, the outer surface of the central axis is fixedly connected to rotating blades, the outside of the filter plate is sleeved with a rotating drum, the outside of the scraper is provided with a sealing plug, and the sealing plug is provided with a buckle.

[0014] Furthermore, the limiting member is provided with an eccentric rod rotatably connected to the torsion plate.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. A water meter accuracy testing device described in the present invention moves along the slide rail of the water tank through a scraper, and when it moves to the position of the blocking block, the blocking block contacts the electric telescopic cylinder, and the electric telescopic cylinder is driven by contact induction, and the electric telescopic cylinder pushes out the telescopic plate, and the telescopic plate moves toward the inner wall of the scraper. When the telescopic plate moves, it gradually scrapes the scale that may be formed on the inner wall of the scraper, thereby avoiding the formation of new scale.

[0017] 2. The water meter accuracy testing equipment described in the present invention links the vertical pole and the second turntable to rotate synchronously when the first turntable is twisted. After the vertical pole rotates, the eccentric protrusion and the clamp on the outer surface are driven to move. Since the vertical pole is not located at the exact center of the eccentric protrusion, the eccentric protrusion and the clamp are eccentric when they rotate, so that a deflected force is formed after the clamp is rotated. The deflected force of the clamp squeezes the water meter, and the twisting disk deflects and moves in the limit member, and the water meter is gradually clamped and fixed, thereby having the function of improving stability, avoiding water leakage due to decreased tightness of the connection after a long period of use, and is beneficial to improving the accuracy of the equipment.

[0018] 3. The water meter accuracy testing equipment described in the present invention drives the deflection block to move synchronously through the movement of the scraper. The deflection block moves to the position of the guide bar and contacts the guide bar. The deflection block is deflected after being squeezed by the guide bar. The deflection block drives the baffle to rotate. After the baffle rotates, the baffle separates from the blocked hole. After the hole leaks out, water gradually moves through the hole toward the direction of the diversion pipe. Finally, the diversion pipe runs to the water meter position above to complete the cycle, thereby preventing the problem of water circulation being blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure analysis of the present invention;

[0021] Figure 2 It is a schematic diagram of the matching structure of the skateboard and the shell of the present invention;

[0022] Figure 3 It is a schematic diagram of the support pipe structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the distance adjustment component structure of the present invention;

[0024] Figure 5 It is a schematic diagram of the cooperation structure of the clamping component and the support rod of the present invention;

[0025] Figure 6 It is a schematic diagram of the overall dissection of the clamping component of the present invention;

[0026] Figure 7 It is the present invention Figure 7 Partial enlarged schematic diagram of the torsion disc structure at C in the present invention;

[0027] Figure 8 It is a schematic diagram of the cooperation structure of the spray column and the through pipe of the present invention;

[0028] Figure 9 It is a schematic diagram of the internal dissection of the water meter of the present invention;

[0029] Figure 10 It is a schematic diagram of the cooperation of the outer shell and the water storage tank of the present invention;

[0030] Figure 11 It is an analysis diagram of the cooperation of the scraper and the water storage tank of the present invention;

[0031] Figure 12 It is a schematic diagram of the overall scraping component of the present invention;

[0032] Figure 13 It is a schematic diagram of the overall descaling component of the present invention;

[0033] Figure 14 It is the present invention Figure 13 Partial enlarged schematic diagram of the extension plate at A in the present invention;

[0034] Figure 15 It is a schematic diagram of the separation component structure of the present invention;

[0035] Figure 16 It is the present invention Figure 13 Partial enlarged schematic diagram of the sealing plug structure at E in the present invention;

[0036] Figure 17 It is the present invention Figure 12 Partial enlarged schematic diagram of the baffle structure at D in the present invention.

[0037] In the figure: 1, bottom leg; 2, water storage tank; 21, scraper; 22, rotating rod; 23, deflection block; 24, elastic member; 25, baffle; 26, slider; 27, guide bar; 211, extension plate; 213, electric telescopic cylinder; 214, telescopic plate; 215, blocking block; 3, diversion pipe; 31, rotating cylinder; 33, filter plate; 34, central axis; 35, rotating blade; 36, sealing plug; 4, housing; 5, camera; 6, water meter; 6a, main shaft; 6b, blade; 7, slide plate; 71, moving block; 72, fixed frame; 73, support rod; 74, fixture shell; 70, support tube; 75, weighing scale; 76, through pipe; 741, turntable one; 742, vertical pole; 743, turntable two; 744, toggle rod; 745, eccentric protrusion; 746, torsion plate; 747, limiter; 748, clamp; 761, capsule; 762, spray column; 8, catheter. DETAILED DESCRIPTION

[0038] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0039] Combination Figure 1 As shown, a water meter accuracy test device according to an embodiment of the present invention comprises a bottom leg 1 having a shell 4 fixedly connected to the top, a water tank 2 being clamped at the bottom of the inner cavity of the shell 4, a scraping assembly being installed inside the water tank 2, the scraping assembly being used to clean the scale contained in the water to reduce the influence of the scale on the test of the water meter accuracy, a diversion pipe 3 being fixedly connected to the top of the water tank 2, a water pump being provided inside the diversion pipe 3 for discharging water, a separation assembly being installed inside the diversion pipe 3, the separation assembly preventing the scale from being mixed into the water requiring the accuracy test in a separated state, a camera 5 being installed on the top of the shell 4, the camera 5 being used to take pictures of the index of the water meter test, a slide plate 7 being slidably connected to the upper surface of the shell 4, a distance adjustment assembly being installed at the bottom of the slide plate 7, a water meter 6 being arranged in the middle of the distance adjustment assembly, a main shaft 6a being rotatably connected inside the water meter 6, a blade 6b being installed on the outer surface of the main shaft 6a, the distance adjustment assembly being used to universally adjust the installation position of the water meter 6, and a conduit 8 being plugged into the end side of the shell 4.

[0040] During operation, when performing accuracy tests on the water meter 6, sometimes due to the aging of the water meter 6, the connections at the joints may not be tight, resulting in water leakage. During the test, the accuracy test of the water meter 6 may be inaccurate, and it is necessary to tighten it again before retesting, which is relatively troublesome. When using the embodiment of the present invention, first use the weighing device to weigh the weight of the water inside the water storage tank 2, adjust the distance between the two sliding plates 7, and the sliding plates 7 drive the distance adjustment component to move to a suitable position. Then twist and connect the water meter 6 inside the two distance adjustment components to form a limit, improving the stability of the water meter 6 during testing. At this time, start the water pump, pump the water inside the water storage tank 2 into the distance adjustment component through the diversion pipeline 3, and the water passes through the distance adjustment component and enters the water meter 6 in sequence. The main shaft 6a and the impeller 6b inside the water meter 6 deflect the water, and after the water is deflected, it enters the conduit 8 and finally returns to the water storage tank 2, forming a circulating flow of water; the camera 5 takes pictures of the pointer of the water meter during the test, records the value on the water meter 6, and obtains the flow rate indicated by the pointer of the water meter 6. Then, by judging whether the weight of the water is consistent with the flow rate indicated by the pointer of the water meter 6, it is determined whether it is accurate. If they are consistent, it proves that the reading of the water meter 6 is accurate and the accuracy test is qualified; otherwise, it means that the water meter 6 cannot accurately indicate the water flow rate;

[0041] When detecting the accuracy of the water meter, if too much water scale accumulates in the water and is not processed in time, it will interfere with the reading of the water meter 6 and even cause the problem of the accuracy of the water meter 6 decreasing. When using the embodiment of the present invention, when the water flow passes through the inside of the water storage tank 2, the water flow impacts the scraping component, and the scraping component moves along the inner top wall and the inner bottom wall of the water storage tank 2. After moving, the water scale between the inner top wall and the inner bottom wall of the water storage tank 2 is rubbed off, so that the device has the function of re-accurately testing after cleaning the water scale, preventing the water scale from affecting the test accuracy.

[0042] As Figures 11 to 13 、 Figure 17 shown, the scraping component includes a scraping plate 21 installed inside the water storage tank 2. The water storage tank 2 is inclined. The scraping plate 21 is U-shaped and consists of two horizontal plates and a vertical plate. An elastic member 24 is fixedly connected to the top of the scraping plate 21. A clamping block is fixedly connected to the inner wall of the vertical plate of the scraping plate 21, and a rotating rod 22 is rotatably connected inside the clamping block. A deflecting block 23 is fixedly connected to the outer surface of the rotating rod 22, and a baffle 25 is fixedly connected to the bottom of the deflecting block 23. A slider 26 is fixedly connected to the top of the scraping plate 21. Slide rails adapted to the slider 26 are provided on both the inner top wall and the inner bottom wall of the water storage tank 2, and a guide bar 27 is fixedly connected to the middle of the slide rails; a through hole is provided in the middle of the vertical plate of the scraping plate 21, and the diameter of the baffle 25 is larger than the diameter of the hole. The elastic member 24 is made of rubber.

[0043] During operation, when it is necessary to treat the scale on the top wall and the bottom wall of the water tank 2, the embodiment of the present invention is used. After water enters the water tank 2 through the conduit 8, the water impacts the scraper 21, and the scraper 21 slides along the length direction of the water tank 2. The scraper 21 scrapes the scale as it moves. After scraping, the scale on the top wall and the bottom wall of the water tank 2 gradually detaches from the bottom and is concentrated at the lowest position in the inclined water tank 2, thereby ensuring that the scale on the top wall and the bottom wall of the water tank 2 is cleaned in time; it should be noted that at this time, the baffle 25 is blocked on the through hole of the vertical plate of the scraper 21 by default, and water cannot pass through.

[0044] However, although the scale is cleaned, there will be a problem of obstruction to water circulation. Therefore, when the scraper 21 slides along the slide rail of the water tank 2, the movement of the scraper 21 will drive the deflection block 23 to move synchronously. When the scraper 21 moves to the lowest point, the deflection block 23 moves to the position of the guide bar 27 and contacts the guide bar 27. The deflection block 23 is deflected after being squeezed by the guide bar 27, and the deflection block 23 drives the baffle 25 to rotate. After the baffle 25 rotates, the baffle 25 is separated from the through hole, and water gradually moves through the hole toward the direction of the diversion pipe 3. Finally, the diversion pipe 3 runs to the upper water meter 6 position to complete the circulation, thereby preventing the problem of water circulation being obstructed. It should be noted that a reset spring is installed between the scraper 21 and the slide rail to reset the scraper 21 after movement.

[0045] like Figures 13 to 14 As shown, a descaling component is installed inside the scraper 21, and the descaling component is used to treat the scale grown on the inner top wall and the inner bottom wall of the scraper 21. The descaling component includes an extension plate 211, and the two cross plates of the scraper 21 are fixedly connected to the extension plate 211. An electric telescopic cylinder 213 is installed below the end of the extension plate 211, and a telescopic plate 214 is telescopically connected to the inner wall of the electric telescopic cylinder 213. Two blocking blocks 215 are installed inside the water tank 2; the telescopic plate 214 is in contact with the inner wall of the scraper 21, and the height of the blocking block 215 is flush with the height of the electric telescopic cylinder 213.

[0046] During operation, although the scale on the top and bottom walls of the water tank 2 can be treated, when water flows on the inner wall of the scraper 21 for a long time, new scale will be formed on the top and bottom walls of the scraper 21, and there will still be a problem of affecting the accuracy test of the water meter. Therefore, the scraper 21 moves along the slide rail of the water tank 2, and when it moves to the position of the blocking block 215, the blocking block 215 contacts the electric telescopic cylinder 213, and the electric telescopic cylinder 213 is driven by contact induction. The electric telescopic cylinder 213 pushes out the telescopic plate 214, and the telescopic plate 214 moves toward the inner wall of the scraper 21. When the telescopic plate 214 moves, it gradually scrapes the scale that may be formed on the inner wall of the scraper 21, thereby avoiding the formation of new scale.

[0047] like Figures 3 to 4 , Figure 10 As shown, the distance adjustment component includes a moving block 71 installed at the bottom of the slide 7, guide blocks are arranged at the bottom of both sides of the slide 7, a screw is threadedly driven inside the guide block, and one end of the screw is externally connected to a servo motor, a fixing frame 72 is fixedly connected to the outside of the moving block 71, two support rods 73 are fixedly connected to the ends of the fixing frame 72, a clamp shell 74 is installed between the support rods 73, a supporting tube 75 is arranged inside the clamp shell 74, the supporting tube 75 is used to support the clamp shell 74, a through pipe 76 is installed at the bottom of the clamp shell 74, a weighing scale 70 is installed at the bottom of the water tank 2, the weighing scale 70 is used to weigh water, a capsule 761 is installed on the top of the through pipe 76, a spray column 762 is installed on the side of the capsule 761, and the inside of the clamp shell 74 and the supporting tube 75 are both hollow;

[0048] During operation, before the water meter 6 is inspected and processed, the water meter 6 and the clamp shell 74 need to be connected together first so that the water can circulate. However, the sizes of the water meters 6 are different, so the position of the slide plate 7 needs to be adjusted. Then, using the embodiment of the present invention, the servo motor is started, the screw rod rotates and squeezes the guide block of the slide plate 7, and the slide plate 7 moves along the upper surface of the housing 4 under the action of the screw rod transmission. The slide plate 7 drives the moving block 71, the fixing frame 72, the support rod 73, and the clamp shell 74 to move synchronously. When the slide plate 7 moves to a suitable position, the clamp shell 74 moves synchronously to a suitable position, thereby facilitating the combination of the water meter 6 and the clamp shell 74. It should be noted that the fixing frame 72 and the support rod 73 are both used to enhance the stability of the clamp shell 74.

[0049] like Figures 5 to 8 As shown, a clamping assembly is provided inside the clamp shell 74, and the clamping assembly is used to clamp the water meter 6. The clamping assembly includes a turntable 741 and a turntable 743 rotatably connected inside the clamp shell 74. A vertical rod 742 is fixedly connected between the turntable 741 and the turntable 743. An eccentric protrusion 745 is rotatably connected to the outer surface of the vertical rod 742. A torsion plate 746 and a clamp 748 are provided on the outer surface of the eccentric protrusion 745. The torsion plate The end 746 is rotatably connected to a plurality of limit members 747, the inner wall of the turntable 1 741 is fixedly connected to a toggle rod 744, the top of the toggle rod 744 passes through the interior of the clamp shell 74, and the outer surface of the clamp shell 74 is provided with a rotation groove adapted to the toggle rod 744; the limit member 747 is provided with an eccentric rod rotatably connected to the torsion disk 746; the clamp 748 is provided with a plurality of anti-slip strips inside, and the turntable 1 741 and the turntable 2 743 have the same specifications and dimensions.

[0050] During operation, after the position adjustment is completed, the water meter 6 needs to be clamped to improve the accuracy of the detection. The embodiment of the present invention is used to screw the water meter 6 inside the clamp shell 74, and the toggle rod 744 is moved by hand. The toggle rod 744 drives the turntable 1 741 to move. When the turntable 1 741 is twisted, the linkage vertical rod 742 and the turntable 2 743 rotate synchronously. After the vertical rod 742 rotates, it will drive the eccentric protrusion 745 and the clamp 748 on the outer surface to move. Since the vertical rod 742 is not located on the eccentric protrusion The center of the block 745 and the limiter 747 are fixedly connected to the inner wall of the clamp shell 74, so that the eccentric protrusion 745 and the torsion plate 746 are reversed between the vertical rod 742 and the eccentric rod, and then the eccentric protrusion 745 drives the clamp 748 to rotate and squeeze the water meter 6, and the torsion plate 746 deflects and moves in the limiter 747, and the water meter 6 is gradually clamped and fixed, so as to improve the stability and avoid water leakage caused by the decrease of tightness of the connection after a long time of use, which is conducive to improving the accuracy of the equipment;

[0051] At the same time, two toggle rods 744 are provided. When the upper toggle rod 744 is toggled, it will drive the turntable 741 to rotate, and the lower toggle rod 744 moves synchronously. The lower toggle rod 744 squeezes the capsule 761 to move, and the sodium hypochlorite sprayed out from the capsule 761 is discharged through the through pipe 76 and mixed with water to improve the water quality.

[0052] like Figure 15 , Figure 16 As shown, the separation assembly includes a filter plate 33 installed at the bottom of the guide pipe 3, the middle of the filter plate 33 is rotatably connected to a central shaft 34, the outer surface of the central shaft 34 is fixedly connected to a rotating blade 35, the outer surface of the filter plate 33 is sleeved with a rotating drum 31, and the outer side of the scraper 21 is provided with a sealing plug 36, and the sealing plug 36 is provided with a buckle;

[0053] During operation, when the embodiment of the present invention is used, when water enters the interior of the guide pipe 3 through the scraper 21, the scale is blocked by the filter plate 33 and falls downward, and remains in the water storage tank 2. The water impacts the central axis 34, and the central axis 34 rotates, and the central axis 34 drives the rotating blades 35 to move. The rotating blades 35 move the scale that is about to flow into the filter plate 33, thereby preventing the scale from entering the guide pipe 3 from the filter plate 33, thereby reducing the risk of blocking the filter plate 33, and preventing errors due to the mixing of scale during the accuracy detection of the water meter 6;

[0054] Since the scale is in block shape and accumulates inside the water tank 2 for a long time, it is easy to pollute the water tank 2. Therefore, when it needs to be cleaned in time, the block scale falls to the lowest point along the slope of the water tank 2, and penetrates the bottom wall of the water tank 2 into the sealing plug 36. After the test is completed, the buckle is opened by hand to open the sealing plug 36 to release the scale from the water tank 2. It should be noted that the sealing plug 36 is installed on the outside of the bottom position of the water tank 2.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A water meter accuracy testing device, characterized in that: The invention comprises a bottom leg (1) having a housing (4) fixedly connected to the top thereof, a water storage tank (2) being clamped at the bottom of the inner cavity of the housing (4), a scraping assembly being installed inside the water storage tank (2), the scraping assembly being used to clean scale contained in water to reduce the influence of scale on the test of water meter accuracy, a diversion pipe (3) being fixedly connected to the top of the water storage tank (2), the diversion pipe (3) having a water pump inside for discharging water, a separation assembly being installed inside the diversion pipe (3), the separation assembly preventing scale from being mixed into the water requiring accuracy test in a separated state, In water, a camera (5) is installed on the top of the housing (4), and the camera (5) is used to take pictures of the index of the water meter test. A slide plate (7) is slidably connected to the upper surface of the housing (4), and a distance adjustment component is installed at the bottom of the slide plate (7). A water meter (6) is arranged in the middle of the distance adjustment component. A main shaft (6a) is rotatably connected inside the water meter (6), and a blade (6b) is installed on the outer surface of the main shaft (6a). The distance adjustment component is used to universally adjust the installation position of the water meter (6). A conduit (8) is plugged into the end side of the housing (4).

2. A water meter accuracy testing device according to claim 1, characterized in that: The scraping assembly comprises a scraper (21) installed inside a water tank (2), the water tank (2) being arranged at an angle, the scraper (21) being composed of two horizontal plates and a vertical plate, the top of the scraper (21) being fixedly connected with an elastic member (24), the inner wall of the vertical plate of the scraper (21) being fixedly connected with a clamping block, the inside of the clamping block being rotatably connected with a rotating rod (22), the outer surface of the rotating rod (22) being fixedly connected with a deflection block (23), the bottom of the deflection block (23) being fixedly connected with a baffle (25), the top of the scraper (21) being fixedly connected with a slider (26), the inner top wall and the inner bottom wall of the water tank (2) being provided with a slide rail matched with the slider (26), the middle of the slide rail being fixedly connected with a guide bar (27).

3. A water meter accuracy testing device according to claim 2, characterized in that: The scraper (21) is in a U shape, a hole is provided in the middle of the vertical plate of the scraper (21), the diameter of the baffle (25) is larger than the diameter of the hole, and the elastic member (24) is made of rubber.

4. A water meter accuracy testing device according to claim 2, characterized in that: A descaling component is installed inside the scraper (21), and the descaling component is used to treat scale grown on the inner top wall and inner bottom wall of the scraper (21). The descaling component comprises an extension plate (211), and the two transverse plates of the scraper (21) are fixedly connected to the extension plate (211) inside. An electric telescopic cylinder (213) is installed below the end of the extension plate (211), and the inner side wall of the electric telescopic cylinder (213) is telescopically connected to a telescopic plate (214). Two blocking blocks (215) are installed inside the water storage tank (2); the telescopic plate (214) is in contact with the inner wall of the scraper (21), and the height of the blocking block (215) is flush with the height of the electric telescopic cylinder (213).

5. The water meter accuracy testing device according to claim 1, characterized in that: The distance adjustment assembly comprises a moving block (71) mounted at the bottom of the slide plate (7), guide blocks are arranged at the bottom of both sides of the slide plate (7), a screw rod is threadedly driven inside the guide block, and one end of the screw rod is externally connected to a servo motor, a fixing frame (72) is fixedly connected to the outside of the moving block (71), two support rods (73) are fixedly connected to the end of the fixing frame (72), a clamp shell (74) is installed between the support rods (73), and a supporting tube (75) is arranged inside the clamp shell (74). The tube (75) is used to support the clamp shell (74); a through tube (76) is installed at the bottom of the clamp shell (74); a weighing scale (70) is installed at the bottom of the water storage tank (2); the weighing scale (70) is used to weigh water; a capsule (761) is installed at the top of the through tube (76); a spray column (762) is installed at the side of the capsule (761); the capsule (761) and the spray column (762) cooperate to improve water quality; the inside of the clamp shell (74) and the supporting tube (75) are both hollow.

6. A water meter accuracy testing device according to claim 5, characterized in that: A clamping assembly is arranged inside the clamp shell (74), and the clamping assembly is used to clamp the water meter (6). The clamping assembly includes a turntable 1 (741) and a turntable 2 (743) which are rotatably connected inside the clamp shell (74). A vertical rod (742) is fixedly connected between the turntable 1 (741) and the turntable 2 (743). An eccentric protrusion (745) is rotatably connected to the outer surface of the vertical rod (742). A torsion plate (746) and a clamp (748) are arranged on the outer surface of the eccentric protrusion (745). A plurality of limit members (747) are rotatably connected to the end of the torsion plate (746). A toggle rod (744) is fixedly connected to the inner side wall of the turntable 1 (741), and the top of the toggle rod (744) passes through the interior of the clamp shell (74).

7. A water meter accuracy testing device according to claim 6, characterized in that: The outer surface of the clamp shell (74) is provided with a rotation groove matched with the toggle rod (744).

8. A water meter accuracy testing device according to claim 6, characterized in that: A plurality of anti-slip strips are arranged inside the clamp (748), and the specifications and dimensions of the turntable 1 (741) and the turntable 2 (743) are the same.

9. A water meter accuracy testing device according to claim 2, characterized in that: The separation assembly comprises a filter plate (33) mounted at the bottom of the guide pipe (3); a central shaft (34) is rotatably connected to the middle of the filter plate (33); a rotating blade (35) is fixedly connected to the outer surface of the central shaft (34); a rotating drum (31) is sleeved on the outside of the filter plate (33); a sealing plug (36) is arranged on the outside of the scraper (21); and a buckle is arranged on the sealing plug (36).

10. The water meter accuracy testing device according to claim 6, characterized in that: The limiting member (747) is provided with an eccentric rod rotatably connected to the torsion plate (746).

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