Internal resistance detection jig of split type electromagnetic water meter body

Abstract

The utility model provides an internal resistance detection jig of a split type electromagnetic water meter body. The internal resistance detection jig comprises a jig body and a water meter supporting seat, the jig body comprises a fixing pipe, the lower portion of the fixing pipe is fixedly connected with a fixing frame, an opening groove with a downward opening is formed in the lower portion of the fixing frame, and an open hole directly communicated with the opening groove is formed in the center of the upper end face of the fixing frame. Pin shafts are fixed to the two ends of the bottom of the open groove respectively, rotating supports are rotationally connected into the pin shafts, and probes are fixedly installed on the outer end faces of the rotating supports. The inner end faces of the two rotating supports are connected with extension springs for pulling the rotating supports inwards. According to the utility model, the detection jig is made into a split structure, so that the problem that a large-caliber water meter is inconvenient to carry and lift is solved; the extension spring is connected between the two rotating brackets, so that the rotating brackets are inwards contracted when not pushed by the moving rod, and the probe is prevented from scratching a coating on the inner wall of the measuring tube in the process that the fixed bracket enters and exits from the measuring tube.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic water meter assembly and testing technology, specifically, to a fixture for testing the internal resistance of a split-type electromagnetic water meter body. Background Technology

[0002] After assembling the coil assembly, existing electromagnetic water meters require testing for insulation resistance and continuity between the meter body and electrodes, between electrodes, and between electrodes and coils. This allows for the detection and repair of defective products before welding the outer casing, preventing internal problems from occurring after assembly and welding that would prevent disassembly and repair.

[0003] Existing small-diameter testing fixtures employ an integrated structure. The water meter is inserted into the top of the fixture, and then the upper handle is moved to bring the probe into contact with the electrodes. The probe is then electrically connected to an insulation resistance tester via a wire to measure the internal resistance of the electromagnetic water meter. This type of fixture is suitable for small-diameter water meters, but for large-diameter water meters, due to their weight, it is difficult for operators to lift and insert them into the fixture. Utility Model Content

[0004] The purpose of this utility model is to provide a fixture for detecting the internal resistance of a split-type electromagnetic water meter body, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides a fixture for detecting the internal resistance of a split-type electromagnetic water meter body, comprising a fixture body and a water meter support for placing the electromagnetic water meter body. The fixture body and the water meter support are of a split-type structure. The fixture body includes a fixing tube, and a fixing frame is fixedly connected to the lower part of the fixing tube. The lower part of the fixing frame has an opening groove with an opening facing downwards, and the center of the upper end face of the fixing frame has an opening that passes through the opening groove. Pins are fixed at both ends of the bottom of the opening groove, and a rotating bracket is rotatably connected to the pins. The outer end face of the rotating bracket is fixed. The device is equipped with a probe, which is electrically connected to an insulation resistance tester via a wire. Tension springs are connected to the inner end faces of the two rotating supports to pull the rotating supports inward, preventing the probe heads from protruding from the side of the fixed frame. A disc-shaped positioning cover plate that can move up and down is fitted onto the upper part of the fixed tube. The lower end face of the positioning cover plate has a circular positioning groove. When measuring the internal resistance of the electromagnetic water meter body, the positioning groove locks the upper end of the measuring tube. A movable rod that can move up and down and push the rotating supports outward is installed inside the fixed tube.

[0006] As a further improvement to this technical solution, the upper end face of the moving rod is provided with a stop that can limit the movement, so as to prevent the moving rod from hitting the tension spring when it moves downward.

[0007] As a further improvement to this technical solution, the positioning cover plate is equipped with a set screw that can lock it together with the fixing tube.

[0008] As a further improvement to this technical solution, the water meter support base includes a base plate, on which a water meter fixing plate is mounted, and the water meter fixing plate is provided with a plurality of annular grooves.

[0009] As a further improvement to this technical solution, a sensor for detecting the presence or absence of an electromagnetic water meter is installed at the center of the upper surface of the water meter fixing plate. The sensor is electrically connected to an insulation resistance tester via a second data line.

[0010] As a further improvement to this technical solution, the water meter fixing plate has two layers, and each layer has several annular grooves of different diameters on its upper surface to accommodate the placement of measuring tubes of different diameters.

[0011] As a further improvement to this technical solution, the water meter support base is also equipped with a water meter display screen bracket consisting of four sets of flat plates forming a "well" structure.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: by making the detection fixture into a split structure, the problem of large-diameter water meters being inconvenient to lift is solved; by setting a movable rod that can move up and down in the fixed tube, the downward movement of the movable rod pushes the rotating bracket in the fixed frame to open, so that the probe contacts the electrode of the measuring tube, thereby completing the detection of the internal resistance of the electromagnetic water meter; the tension spring connected between the two rotating brackets causes the rotating brackets to retract inward when there is no movable rod pushing, thereby avoiding the probe scratching the coating on the inner wall of the measuring tube during the process of the fixed frame entering and exiting the measuring tube. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the structure of the main body of the jig.

[0015] Figure 3 This is a schematic diagram of the structure of an electromagnetic water meter;

[0016] Figure 4 A schematic diagram of the fixture body being inserted into the electromagnetic water meter;

[0017] Figure 5 This is a schematic diagram showing the insertion and removal states of the movable rod in this utility model.

[0018] Figure 6 This is a schematic diagram of the present invention in the measurement state.

[0019] The meanings of the labels in the diagram are as follows:

[0020] 1. Insulation resistance tester; 11. Grounding clamp; 12. First data line; 13. Conductor

[0021] 2. Water meter support base; 21. Base plate; 22. Water meter fixing plate; 23. Sensor; 24. Water meter display screen bracket; 25. Second data cable;

[0022] 3. Fixture body; 31. Positioning groove; 32. Positioning cover plate; 33. Fixing tube; 34. Moving rod; 35. Stop; 36. Pin; 37. Fixing frame; 38. Probe; 39. Tension spring; 310. Rotating bracket; 371. Opening groove.

[0023] 4. Electromagnetic water meter; 41. Electrode; 42. Water meter display screen; 43. Measuring tube. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0026] Example 1

[0027] This embodiment provides a fixture for detecting the internal resistance of a split-type electromagnetic water meter body, such as... Figure 1 As shown, it includes a fixture body 3 and a water meter support 2. The fixture body 3 and the water meter support 2 are separate structures. When measuring the internal resistance of the electromagnetic water meter 4, the fixture body 3 is used to push the probe 38 to contact the electrode 41 in the measuring tube 43 of the electromagnetic water meter 4. The water meter support 2 is used to place the body of the electromagnetic water meter 4 when measuring the resistance. The specific structure is detailed below.

[0028] like Figure 2 As shown, the fixture body 3 is an independent and movable structure, including a fixed tube 33 with a circular cross-section. A square fixing frame 37 is fixedly connected to the lower part of the fixed tube 33. The lower part of the fixing frame 37 is provided with an opening groove 371 with an opening facing downwards. A circular opening is provided at the center of the upper end face of the fixing frame 37, which leads directly to the opening groove 371. A pin 36 is fixed at both ends of the bottom of the opening groove 371. A rotating bracket 310 is rotatably connected to the pin 36. The rotating bracket 310 is a plate-shaped body with a parallelogram shape. On the outer end face of the rotating bracket 310... A probe 38 is fixedly mounted at the bottom; during measurement, the probe 38 is electrically connected to the insulation resistance tester 1 via a wire 13; a tension spring 39 is connected to the inner end face of the two rotating brackets 310. The function of the tension spring 39 is that, in the free state, the free ends of the two rotating brackets 310 are placed inside the opening slot 371 under the tension of the tension spring 39, so that the head of the probe 38 does not protrude from the side of the fixed frame 37. When the fixed frame 37 enters and exits the inner cavity of the measuring tube 43, it ensures that the sharp head of the probe 38 will not scratch the coating on the inner wall of the measuring tube 43 of the electromagnetic water meter 4.

[0029] like Figure 2 As shown, a movable disc-shaped positioning cover plate 32 is installed on the upper part of the fixed tube 33. When it is necessary to fix the positioning cover plate 32 to the fixed tube 33, it can be locked to the fixed tube 33 by means of a set screw installed on the positioning cover plate 32. When it is necessary to change the relative position of the positioning cover plate 32 and the fixed tube 33, simply loosen the set screw and move the positioning cover plate 32. Depending on the specifications of the electromagnetic water meter 4, different sizes of positioning cover plates 32 can be replaced to adapt to different diameter measuring tubes 43. The relative position of the positioning cover plate 32 and the fixed tube 33 can be adjusted by means of a set screw, so that it can also be used for electromagnetic water meters 4 with electrodes 41 of different heights. A circular positioning groove 31 is provided on the lower end face of the positioning cover plate 32. The diameter of the positioning groove 31 is slightly larger than the outer diameter of the measuring tube 43 in the electromagnetic water meter 4 to ensure that the positioning cover plate 32 can be properly locked at the upper end of the measuring tube 43. A cylindrical movable rod 34 that can move up and down is installed in the inner cavity of the fixed tube 33; a stop 35 that can limit the movement is provided on the upper end face of the movable rod 34 to prevent the movable rod 34 from hitting the tension spring 39 due to excessive movement distance when it moves downward.

[0030] like Figure 1As shown, the water meter support base 2 includes a base plate 21, and a water meter fixing plate 22 is installed on the right side of the upper surface of the base plate 21. An annular groove is provided on the upper surface of the water meter fixing plate 22. To accommodate electromagnetic water meters of different specifications, the water meter fixing plate 22 can be divided into upper and lower layers. Two annular grooves of different diameters are provided on the upper surface of each layer to accommodate the placement of measuring tubes 43 of different diameters. A sensor 23 is installed at the center of the upper surface of the water meter mounting plate 22. The sensor 23 is electrically connected to the insulation resistance tester 1 via the second data line 25. The function of the sensor 23 is to detect the presence or absence of the electromagnetic water meter 4 and transmit the signal of whether the electromagnetic water meter 4 is present on the water meter mounting plate 22 to the insulation resistance tester 1. The insulation resistance tester 1 can only work after receiving the signal from the sensor 23 that the electromagnetic water meter 4 is present on the water meter mounting plate 22 when the power switch is turned on. On the left side of the water meter support base 2, there is a water meter display screen 42 bracket 24 composed of four sets of flat plates forming a "well" structure. Its function is to support the display screen of the electromagnetic water meter 4 when the electromagnetic water meter 4 is being detected, so that the electromagnetic water meter 4 is in a more stable state, which is conducive to the implementation of resistance measurement.

[0031] When using, such as Figure 4 , 5 As shown in Figure 6, the operator first inverts the electromagnetic water meter 4, then places the measuring tube 43 of the electromagnetic water meter 4 into the corresponding annular groove on the water meter support 2, and places the water meter display screen 42 on the water meter display screen 42 bracket 24; then clamps the ground wire clamp 11 of the insulation resistance tester 1 onto the outer shell of the water meter display screen 42, and then connects the first data line 12 to the insulation resistance tester 1 and the water meter display screen 42 respectively, and the second data line 25 to the insulation resistance tester 1; then the fixture body 3 is placed from top to bottom into the inside of the measuring tube 43 (note: when placing the fixture body 3, the two sides of the fixing bracket 37 with the probe 38 are parallel to the display screen of the electromagnetic water meter 4), and then the moving rod 3 is pressed down. 4. Since the two rotating brackets 310 are always in a contracted state due to the traction of the tension spring 39, when the moving rod 34 moves down to a certain position, its bottom will contact the rotating bracket 310. When the downward pushing force of the moving rod 34 is greater than the tension force of the tension spring 39, the rotating bracket 310 rotates outward under the action of the moving rod 34, thereby driving the probe 38 to move outward in an arc along the horizontal direction and contact the electrode 41 on the inner wall of the measuring tube 43. When the baffle 35 abuts against the fixed tube 33, the downward pressure stops. Then, turn on the power switch of the insulation resistance tester 1 and press the automatic detection button to perform automatic detection. After the detection is completed, the insulation resistance tester 1 will indicate whether the detection result is qualified or unqualified.

[0032] When the test is completed and the fixture body 3 is to be removed, first lift the moving rod 34 upward. As the moving rod 34 moves upward, it gradually disengages from the rotating bracket 310. Under the action of the tension spring 39, the two rotating brackets 310 also gradually retract inward. The probe 38 then disengages from the electrode 41 and is hidden inside the fixing frame 37. At the same time, hold the outer edge of the positioning cover plate 32 and slowly lift the fixture body 3 upward until it is completely removed.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fixture for detecting the internal resistance of a split-type electromagnetic water meter body, characterized in that: The fixture includes a fixture body (3) and a water meter support base (2) for placing the electromagnetic water meter body. The fixture body (3) and the water meter support base (2) are separate structures. The fixture body (3) includes a fixing tube (33). A fixing frame (37) is fixedly connected to the lower part of the fixing tube (33). The fixing frame (37) has an opening groove (371) with an opening facing downwards at the lower part. An opening hole that passes through the opening groove (371) is provided at the center of the upper end face of the fixing frame (37). Pins (36) are fixed at both ends of the bottom of the opening groove (371). A rotating bracket (310) is rotatably connected in the pins (36). A probe (38) is fixedly mounted on the outer end face of the rotating bracket (310). The probe (38) passes through a guide... The wire (13) is electrically connected to the insulation resistance tester (1); the inner end faces of the two rotating brackets (310) are connected to tension springs (39) that pull the rotating brackets (310) inward, so that the head of the probe (38) does not protrude from the side of the fixed frame (37); a disc-shaped positioning cover plate (32) that can move up and down is installed on the upper part of the fixed tube (33), and a circular positioning groove (31) is provided on the lower end face of the positioning cover plate (32). When the internal resistance value of the electromagnetic water meter body is measured, the positioning groove (31) locks the upper end of the measuring tube (43); a movable rod (34) that can move up and down and can push the rotating bracket (310) to open outward is installed in the inner cavity of the fixed tube (33).

2. The inner resistance detection jig for the split electromagnetic water meter body according to claim 1, characterized in that: The upper end face of the movable rod (34) is provided with a stop (35) that can limit the movement, so as to prevent the movable rod (34) from hitting the tension spring (39) when it moves downward.

3. The inner resistance detection tool for the split electromagnetic water meter body according to claim 1, characterized in that: The positioning cover plate (32) is equipped with a set screw that can lock it together with the fixing tube (33).

4. The inner resistance detection tool for the split electromagnetic water meter body according to claim 1, characterized in that: The water meter support base (2) includes a base plate (21), on which a water meter fixing plate (22) is mounted, and the water meter fixing plate (22) is provided with a plurality of annular grooves.

5. The inner resistance detection tool for the split electromagnetic water meter body according to claim 4, characterized in that: A sensor (23) for detecting the presence or absence of an electromagnetic water meter (4) is installed at the center of the upper surface of the water meter fixing plate (22). The sensor (23) is electrically connected to the insulation resistance tester (1) through the second data line (25).

6. The inner resistance detection tool for the split electromagnetic water meter body according to claim 4, characterized in that: The water meter fixing plate (22) consists of two layers, with several annular grooves of different diameters on the upper surface of each layer to accommodate the placement of measuring tubes (43) of different diameters.

7. The inner resistance detection tool for the split electromagnetic water meter body according to claim 4, characterized in that: The water meter support base (2) is also equipped with a water meter display screen (42) bracket (24) consisting of four sets of flat plates forming a "well" structure.

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