Detection jig for arc-shaped protective cover of measuring pipe of electromagnetic water meter

Abstract

The utility model relates to the technical field of processing and detection of water meters, in particular to a detection jig for an arc-shaped protective cover of a measuring pipe of an electromagnetic water meter. The device comprises an arc-shaped protective cover detection jig, two guide holes are formed in the top of the arc-shaped protective cover detection jig, and hole distance detection positioning columns are arranged in the guide holes in a sliding mode. According to the utility model, the positioning holes on the protective cover are detected through the two hole distance detection positioning columns, the distance between the two positioning holes is determined, and the two sides of the protective cover are guided through the avoiding inclined planes, so that the edge of the protective cover is in contact with the limiting table; therefore, whether the opening part of the protective cover can complete the detection of the width of the upper positioning hole and the opening of the arc-shaped protective cover along the pass-stop detection table or not is judged, meanwhile, when the protective cover is detected, the protective cover only needs to be placed on the arc-shaped protective cover detection jig and pressed, the effect of detecting the protective cover can be completed, and the operation is convenient.

Description

Technical Field

[0001] This utility model relates to the field of water meter processing and testing technology, specifically to a testing fixture for an arc-shaped protective cover for an electromagnetic water meter measuring tube. Background Technology

[0002] Existing electromagnetic water meters have two coil units symmetrically installed on both sides of the center of the measuring tube. To shield and protect the coil units and their generated magnetic field, and to avoid external signal interference, such as... Figure 1 and 2 As shown, an arc-shaped protective cover 2 is installed outside the inner core 3 of the electromagnetic water meter coil assembly. On the one hand, the arc-shaped protective cover 2 can avoid external signal interference; on the other hand, it can protect the coil assembly inside the inner core 3. Therefore, the screw fixing hole distance between the arc-shaped protective cover 2 and the inner core 3 of the electromagnetic water meter coil assembly is very important. In addition, the upper and lower arc-shaped protective covers 2 are fixed by overlapping each other on both sides with screws. To avoid installation failure due to poor hole spacing of the two upper positioning holes of the arc-shaped protective cover 2, and to ensure normal use of the arc-shaped protective cover 2 after production, a fixture with a simple structure and convenient operation is needed to detect the hole spacing and opening width of the two upper mounting holes of the arc-shaped protective cover. Utility Model Content

[0003] The purpose of this invention is to provide a testing fixture for an arc-shaped protective cover for an electromagnetic water meter measuring tube, in order to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides a testing fixture for an arc-shaped protective cover of an electromagnetic water meter measuring tube, comprising an arc-shaped protective cover testing fixture. The top of the arc-shaped protective cover testing fixture has two guide holes. A hole spacing detection positioning post is slidably disposed inside the guide holes. The top of the hole spacing detection positioning post is shaped like a jar, with its upper end dimension smaller than its lower end dimension. One end of the hole spacing detection positioning post passes through the upper end of the guide holes and extends outwards. symmetrically fixed go / stop detection platforms are fixed on both sides of the arc-shaped protective cover testing fixture. A limiting platform is fixed on the lower side of the go / stop detection platform. The end of the limiting platform away from the arc-shaped protective cover testing fixture is greater than the distance between the go / stop detection platform and the side wall of the arc-shaped protective cover testing fixture.

[0005] As a further improvement to this technical solution, the top of the arc-shaped protective cover testing fixture is set as a plane, and the two sides of the plane are provided with downwardly extending avoidance slopes. The avoidance slopes are arc-shaped and their arcs extend to one side of the pass / stop testing table.

[0006] As a further improvement to this technical solution, the bottom end of the guide hole penetrates the bottom of the arc-shaped protective cover detection fixture, and a set screw is threadedly connected to the bottom end of the guide hole, which seals the bottom of the guide hole.

[0007] As a further improvement to this technical solution, a limiting post is fixed at the bottom of the hole spacing detection and positioning post, and a spring is provided between the bottom of the hole spacing detection and positioning post and the upper side of the set screw. The spring is sleeved on the outside of the limiting post, and the spring pushes the hole spacing detection and positioning post to move away from the set screw.

[0008] As a further improvement to this technical solution, both ends of the arc-shaped protective cover testing fixture are provided with mounting holes, and screws are provided inside the mounting holes. The screws are threadedly connected to the arc-shaped protective cover testing fixture, and one end of the screws extends into the guide hole.

[0009] As a further improvement to this technical solution, a short groove and a long groove are respectively provided on the side wall of the hole spacing detection positioning post. The tops of the short groove and the long groove are at the same horizontal height, and the bottom of the long groove is lower than the bottom of the short groove. One end of the screw is inserted into one of the short groove or the long groove.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] In the testing fixture for the arc-shaped protective cover of the electromagnetic water meter measuring tube, the positioning holes on the protective cover are tested through two hole-distance testing positioning posts to determine the distance between the two positioning holes. At the same time, the inclined surfaces guide the two sides of the protective cover to make the edge of the protective cover contact with the limiting platform. This is to determine whether the opening of the protective cover can complete the testing of the upper positioning hole and the width of the arc-shaped protective cover opening along the pass-stop testing platform. In addition, when testing the protective cover, it is only necessary to place the protective cover on the arc-shaped protective cover testing fixture and press it to complete the testing effect. The operation is convenient and ensures the accuracy of the protective cover dimensions, avoids the occurrence of defective parts in subsequent projects, and reduces unnecessary disassembly work. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the arc-shaped protective cover and the inner core of the electromagnetic water meter coil assembly of this utility model.

[0013] Figure 2 A schematic diagram of the exploded structure of the inner core of the arc-shaped protective cover and the electromagnetic water meter coil assembly, which are utility models.

[0014] Figure 3 A schematic diagram of the structure of the arc-shaped protective cover testing fixture of the utility model;

[0015] Figure 4 This is a cross-sectional structural diagram of the arc-shaped protective cover testing fixture of the utility model.

[0016] Figure 5 This is a schematic diagram of the arc-shaped protective cover structure of a utility model;

[0017] Figure 6 This is one of the schematic diagrams of the combined structure of a utility model arc-shaped protective cover testing fixture for testing arc-shaped protective covers;

[0018] Figure 7 This is one of the schematic diagrams of the combined structure of the arc-shaped protective cover testing fixture for testing arc-shaped protective covers, which is a utility model.

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

[0020] 1. Arc-shaped protective cover inspection fixture; 11. Hole spacing inspection positioning post; 111. Short groove; 112. Long groove; 113. Limiting post; 114. Spring; 115. Set screw; 12. Guide hole; 13. Mounting hole; 14. Avoidance slope; 15. Go / stop inspection table; 16. Limiting table; 17. Screw.

[0021] 2. Arc-shaped protective cover; 21. Upper positioning hole; 3. Inner core of electromagnetic water meter coil assembly. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] Example 1

[0025] Please see Figures 3-4As shown, this embodiment provides a testing fixture for an arc-shaped protective cover of an electromagnetic water meter measuring tube, including an arc-shaped protective cover testing fixture 1. Two guide holes 12 are formed at the top of the arc-shaped protective cover testing fixture 1. The bottom end of the guide holes 12 penetrates the bottom of the arc-shaped protective cover testing fixture 1. A hole spacing detection positioning post 11 is slidably disposed inside the guide holes 12, and one end of the hole spacing detection positioning post 11 penetrates the upper end of the guide holes 12 and extends outwards. Simultaneously, a limit post 113 is fixed at the bottom of the hole spacing detection positioning post 11. 2. A set screw 115 is threaded near the bottom end, which seals the bottom of the guide hole 12. A spring 114 is provided between the bottom of the hole distance detection positioning post 11 and the upper side of the set screw 115. The spring 114 is sleeved on the outside of the limiting post 113. The spring 114 pushes the hole distance detection positioning post 11 to move away from the set screw 115. When the hole distance detection positioning post 11 is under pressure, the hole distance detection positioning post 11 moves downward, so that the hole distance detection positioning post 11 squeezes the spring 114.

[0026] refer to Figure 5 As shown, the arc-shaped protective cover 2 is n-shaped. Two upper positioning holes 21 are formed near the center of the arc-shaped protective cover 2. The top of the hole distance detection positioning post 11 is shaped like a jar, with its upper end smaller than its lower end. The size of the upper positioning holes 21 is larger than the top of the jar shape but smaller than its bottom. When placing the arc-shaped protective cover 2, the positions of the two hole distance detection positioning posts 11 and the upper positioning holes 21 are aligned and placed to form the shape shown. Figure 6 As shown, when using the device, first align the positions of one of the hole spacing detection positioning posts 11 and the upper positioning hole 21, and then determine the connection relationship between the other hole spacing detection positioning post 11 and the upper positioning hole 21. Based on the placement relationship between the two hole spacing detection positioning posts 11 and the two upper positioning holes 21, if there is no misalignment between the two hole spacing detection positioning posts 11 and the two upper positioning holes 21, it indicates that the opening position of the two upper positioning holes 21 is correct. If there is a misalignment between the two hole spacing detection positioning posts 11 and the two upper positioning holes 21 (one of the hole spacing detection positioning posts 11 cannot be accurately inserted into the upper positioning hole 21), it indicates that the opening position between the two upper positioning holes 21 is problematic. In this case, the problematic arc-shaped protective cover 2 should be marked as unqualified.

[0027] After the two upper positioning holes 21 are correctly positioned, press the arc-shaped protective cover 2 downwards to determine the size of the opening of the arc-shaped protective cover 2. To facilitate the detection of the opening of the arc-shaped protective cover 2, the top of the arc-shaped protective cover detection fixture 1 is set as a plane. Horizontal stop and go detection platforms 15 are symmetrically fixed on both sides of the arc-shaped protective cover detection fixture 1. Downward-extending avoidance slopes 14 are provided on both sides of the plane. The avoidance slopes 14 are arc-shaped, extending to one side of the stop and go detection platform 15. A limiting platform 16 is fixed to the lower side of the stop and go detection platform 15, with the limiting platform 16 located away from the arc-shaped protective cover detection fixture 1. The distance between the go / no-go detection platform 15 and the side wall of the arc-shaped protective cover detection fixture 1 is greater than the distance the limiting platform 16 extends away from the arc-shaped protective cover detection fixture 1. In other words, the distance the limiting platform 16 extends away from the arc-shaped protective cover detection fixture 1 is greater than the distance the go / no-go detection platform 15 extends. During the downward pressing of the arc-shaped protective cover 2, the bottom edge of the arc-shaped protective cover 2 contacts the arc surface of the arc-shaped protective cover detection fixture 1 and moves downward. At this time, the arc-shaped protective cover 2 presses down on the hole spacing detection positioning post 11, causing the hole spacing detection positioning post 11 to move downward. The spring 114 is compressed and contracted. Observe whether the two sides of the arc-shaped protective cover 2 at the opening can smoothly descend to contact the side wall of the limiting platform 16 while descending. Figure 7 As shown, when the bottom edge of the arc-shaped protective cover 2 crosses the side wall of the go / stop detection table 15 and the limiting table 16 and comes into contact, it indicates that the opening of the arc-shaped protective cover 2 is normal. When the bottom of the arc-shaped protective cover 2 cannot descend to the limiting table 16 and there is friction with the go / stop detection table 15, it indicates that the opening of the arc-shaped protective cover 2 is unqualified and cannot be used.

[0028] To limit the descent height of the hole spacing detection positioning post 11, and thus the arc-shaped protective cover 2, mounting holes 13 are provided at both ends of the arc-shaped protective cover detection fixture 1. Screws 17 are installed inside the mounting holes 13, and are threadedly connected to the arc-shaped protective cover detection fixture 1. One end of the screw 17 extends into the guide hole 12. Short grooves 111 and long grooves 112 are respectively provided on the side walls of the hole spacing detection positioning post 11. The tops of the short grooves 111 and long grooves 112 are at the same... The bottom of the long groove 112 is lower than the bottom of the short groove 111. One end of the screw 17 is inserted into either the short groove 111 or the long groove 112. By inserting one end of the screw 17 into the short groove 111 or the long groove 112, the height of the hole distance detection positioning post 11 is limited by the different lengths of the short groove 111 and the long groove 112. This is to prevent the arc-shaped protective cover 2 from moving down too far and damaging the arc-shaped protective cover 2, and to ensure the normal use of the arc-shaped protective cover 2.

[0029] 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 claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A testing fixture for an arc-shaped protective cover of an electromagnetic water meter measuring tube, comprising an arc-shaped protective cover testing fixture (1), characterized in that: The top of the arc-shaped protective cover testing fixture (1) has two guide holes (12). A hole spacing detection positioning post (11) is slidably arranged inside the guide hole (12). The top of the hole spacing detection positioning post (11) is shaped like a jar, with its upper end size smaller than its lower end size. One end of the hole spacing detection positioning post (11) passes through the upper end of the guide hole (12) and extends out. A go / stop detection platform (15) is symmetrically fixed on both sides of the arc-shaped protective cover testing fixture (1). A limit platform (16) is fixed on the lower side of the go / stop detection platform (15). The end of the limit platform (16) away from the arc-shaped protective cover testing fixture (1) is greater than the distance between the go / stop detection platform (15) and the side wall of the arc-shaped protective cover testing fixture (1).

2. The testing fixture for the arc-shaped protective cover of the electromagnetic water meter measuring tube according to claim 1, characterized in that: The top of the arc-shaped protective cover testing fixture (1) is set as a plane, and the two sides of the plane are provided with downward extending avoidance slopes (14). The avoidance slopes (14) are arc-shaped and extend to one side of the pass / stop testing table (15).

3. The testing fixture for the arc-shaped protective cover of the electromagnetic water meter measuring tube according to claim 1, characterized in that: The bottom end of the guide hole (12) passes through the bottom of the arc-shaped protective cover testing fixture (1), and a set screw (115) is threadedly connected to the bottom end of the guide hole (12), and the set screw (115) seals the bottom of the guide hole (12).

4. The testing fixture for the arc-shaped protective cover of the electromagnetic water meter measuring tube according to claim 3, characterized in that: The bottom of the hole spacing detection positioning post (11) is fixed with a limiting post (113). A spring (114) is provided between the bottom of the hole spacing detection positioning post (11) and the upper side of the set screw (115). The spring (114) is sleeved on the outside of the limiting post (113). The spring (114) pushes the hole spacing detection positioning post (11) to move away from the set screw (115).

5. The testing fixture for the arc-shaped protective cover of the electromagnetic water meter measuring tube according to claim 1, characterized in that: The arc-shaped protective cover testing fixture (1) has mounting holes (13) at both ends. Screws (17) are provided inside the mounting holes (13). The screws (17) are threadedly connected to the arc-shaped protective cover testing fixture (1), and one end of the screws (17) extends into the guide hole (12).

6. The testing fixture for the arc-shaped protective cover of the electromagnetic water meter measuring tube according to claim 5, characterized in that: The side wall of the hole spacing detection positioning post (11) is provided with a short groove (111) and a long groove (112). The tops of the short groove (111) and the long groove (112) are at the same horizontal height, and the bottom of the long groove (112) is lower than the bottom of the short groove (111). One end of the screw (17) is inserted into one of the short groove (111) or the long groove (112).

Images