Ammeter detection device

Abstract

The invention relates to the technical field of electric meter detection equipment, and discloses an electric meter detection device, which comprises a detection seat, a detection box is mounted at the top of the detection seat, an indication ring is fixedly assembled on the outer wall of the detection box, a fixed rod is fixedly assembled on the outer wall of the detection box, and a rotating plate is rotationally connected to the outer wall of the fixed rod. According to the electric meter detection device, the pushing assembly and the wiring assembly are arranged in the inner cavity of the detection box, when the driving roller is rotated, the binding posts can be driven under the action of the driving blocks at different positions, so that the binding posts at different positions extend outwards, different permutation and combination are achieved, and after the driving roller is rotated by a circle, the binding posts can be driven by the pushing assembly and the wiring assembly. Four groups of wiring modes with different combinations can be obtained, the situation that a traditional device needs to be manually connected with a detection line is avoided, the to-be-detected electricity meter is detected more conveniently, and under the action of a one-way ratchet wheel and a rotating plate, a driving roller rotates in one direction, and wiring detection is conducted in sequence.

Description

Technical Field

[0001] This invention relates to the field of electricity meter testing equipment technology, specifically to an electricity meter testing device. Background Technology

[0002] An electricity meter is an instrument used to measure electrical energy. Rail-mounted electricity meters are increasingly used due to their high reliability, small size, light weight, and easy installation. Before leaving the factory, electricity meters need to undergo accuracy testing. Only products that meet the standards can be shipped. For a three-phase standard meter, it is necessary to check whether the internal circuit is connected after production, which requires the use of an electricity meter testing device.

[0003] Traditional electricity meter testing equipment requires connecting the testing leads to the meter's terminals using clamps. Testing the terminals is a necessary step, especially for meters with multiple terminals, which require multiple combinations to connect the testing leads to the terminals. Traditional equipment necessitates manually dividing the testing leads into different combinations and clamping them onto the terminals for multiple tests, making the process cumbersome. Summary of the Invention

[0004] The present invention provides an electricity meter testing device that solves the problems mentioned in the background art.

[0005] The present invention provides the following technical solution: an electricity meter testing device, comprising a testing base, a testing box mounted on the top of the testing base, an indicator ring fixedly mounted on the outer wall of the testing box, a fixing rod fixedly mounted on the outer wall of the testing box, a rotating plate rotatably connected to the outer wall of the fixing rod, a torsion spring movably sleeved on the outer wall of the fixing rod, a limit block fixedly mounted on the outer wall of the rotating plate, a pushing assembly provided in the inner cavity of the testing box, a wiring assembly provided in the inner cavity of the testing box, a clamping assembly provided on the outer wall of the testing base, and an electricity meter to be tested mounted on the top of the testing base.

[0006] As a preferred embodiment of the present invention: the pushing assembly includes a driving roller, a knob is fixedly mounted on the outer wall of the driving roller, a driving block is fixedly mounted on the outer wall of the driving roller, a one-way ratchet is fixedly mounted on the outer wall of the driving roller, a limit groove is formed on the outer wall of the one-way ratchet, a fixed cylinder is fixedly mounted on the outer wall of the driving roller, an indicator rod is movably sleeved in the inner cavity of the fixed cylinder, and a support spring is installed in the inner cavity of the fixed cylinder.

[0007] As a preferred embodiment of the present invention: the inner wall shape of the limiting groove matches the outer wall shape of the limiting block, the two ends of the outer wall of the support spring respectively contact the bottom of the indicator rod and the inner wall of the fixed cylinder, and the support spring is made of high carbon steel, and the outer wall diameter of the indicator rod matches the inner wall diameter of the fixed cylinder.

[0008] As a preferred embodiment of the present invention: the wiring assembly includes a mounting groove, an mounting rod is fixedly mounted on the inner wall of the mounting groove, a terminal block is movably sleeved on the outer wall of the mounting rod, a detection line is fixedly mounted on the outer wall of the terminal block, a return spring is movably sleeved on the outer wall of the mounting rod, and an arc-shaped block is fixedly mounted on the outer wall of the terminal block.

[0009] As a preferred embodiment of the present invention: the two ends of the outer wall of the reset spring are in contact with the inner wall of the mounting groove and the outer wall of the terminal block, respectively, and the reset spring is made of high carbon steel. The outer wall of the detection line passes through the top of the detection box and is connected to the terminal block. There are three terminal blocks, and the three terminal blocks are movably sleeved in the inner cavity of the detection box.

[0010] As a preferred embodiment of the present invention: the clamping assembly includes a support base, a rotating plate rotatably connected to the inner cavity of the support base, a rotating seat rotatably connected to the outer wall of the rotating plate, a first clamping seat rotatably connected to the outer wall of the rotating plate, a first screw fixedly mounted on the outer wall of the rotating seat, a drive screw threadedly connected to the outer wall of the first screw, a rotating rod rotatably connected to the outer wall of the support base, and a second clamping seat rotatably connected to the outer wall of the rotating rod.

[0011] As a preferred embodiment of the present invention: the two ends of the inner wall of the driving screw are respectively threaded to the outer walls of the No. 2 screw and the No. 1 screw, and the rotating plate and the rotating rod are both made of stainless steel.

[0012] As a preferred embodiment of the present invention: the two ends of the outer wall of the torsion spring are respectively inserted into the inner cavities of the rotating plate and the fixed rod, and the torsion spring is made of high carbon steel.

[0013] As a preferred technical solution of the present invention: the outer wall shape of the limiting block matches the outer wall shape of the limiting groove, and both the rotating plate and the limiting block are made of stainless steel.

[0014] As a preferred embodiment of the present invention: the installation position of the detection box corresponds to the installation position of the meter to be tested, a first indicator groove is formed on the outer wall of the indicator ring, and a second indicator groove is formed on the outer wall of the indicator ring.

[0015] The present invention has the following beneficial effects: 1. This meter testing device, through a pushing component and a wiring component set in the inner cavity of the testing box, changes the position of the driving block installed on its outer wall when the driving roller rotates 90 degrees. This allows the driving blocks at different positions to drive the terminals, causing them to extend outwards and achieve different arrangements. One end of the terminal is inserted into the inner cavity of the meter under test. After rotating the driving roller one revolution, four different wiring combinations can be obtained, achieving different wiring testing effects. This avoids the need for manual connection of the testing wires required in traditional equipment, making the testing of the meter under test more convenient. Furthermore, when the driving roller rotates, the unidirectional ratchet and rotating plate cause the driving roller to rotate in one direction, performing wiring tests sequentially.

[0016] 2. This meter testing device, through the support base set on the outer wall of the testing seat, can drive the No. 1 and No. 2 screws on both sides when the drive cylinder is rotated. This causes the No. 1 and No. 2 screws on both sides to drive the rotating plate and rotating rod, thereby driving the No. 2 and No. 1 clamping seats on both sides, thus fixing the meter under test and ensuring that the meter under test has a stable testing state. When the device is not in use to test the meter under test, by rotating the drive roller, the indicator rod is positioned at the No. 1 indicator groove. At this time, the arc block is not driven by the drive block, and the terminal is in the inner cavity of the testing box, thus providing a protective effect for the terminal. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the detection seat structure of the present invention; Figure 3 This is a schematic diagram of the detection box structure of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the detection box of the present invention; Figure 5 This is a schematic diagram of the drive roller structure of the present invention; Figure 6 This is a schematic diagram of the indicator ring structure of the present invention; Figure 7 This is a schematic diagram of the mounting groove structure of the present invention; Figure 8 This is a schematic diagram of the unidirectional ratchet structure of the present invention; Figure 9 This is a schematic diagram of the driving block structure of the present invention; Figure 10 This is a schematic diagram of the support structure of the present invention.

[0018] In the diagram: 1. Detection base; 2. Detection box; 3. Indicator ring; 4. Fixing rod; 5. Rotating plate; 6. Torsion spring; 7. Limiting block; 8. Pushing assembly; 9. Wiring assembly; 10. Clamping assembly; 11. Meter under test; 12. Indicator slot 1; 13. Indicator slot 2; 801. Drive roller; 802. Knob; 803. Drive block; 804. One-way ratchet; 805. Limiting groove; 806. Fixing cylinder; 807. Indicator rod; 808. Support spring; 901. Mounting slot; 902. Mounting rod; 903. Terminal block; 904. Detection line; 905. Return spring; 906. Arc-shaped block; 1001, Support base; 1002, Rotating plate; 1003, Rotating seat; 1004, No. 1 clamping seat; 1005, No. 1 screw; 1006, Drive screw barrel; 1007, No. 2 screw; 1008, Rotating rod; 1009, No. 2 clamping seat. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 - Figure 10 An electricity meter testing device includes a testing base 1, a testing box 2 mounted on the top of the testing base 1, an indicator ring 3 fixedly mounted on the outer wall of the testing box 2, a fixing rod 4 fixedly mounted on the outer wall of the testing box 2, a rotating plate 5 rotatably connected to the outer wall of the fixing rod 4, a torsion spring 6 movably sleeved on the outer wall of the fixing rod 4, a limit block 7 fixedly mounted on the outer wall of the rotating plate 5, a pushing assembly 8 provided in the inner cavity of the testing box 2, a wiring assembly 9 provided in the inner cavity of the testing box 2, a clamping assembly 10 provided on the outer wall of the testing base 1, and an electricity meter 11 to be tested mounted on the top of the testing base 1. In the above structure, the support seat 1001 provided on the outer wall of the detection seat 1 drives the rotating plates 1002 on both sides under the action of the drive screw 1006 and the first screw 1005, so that the rotating plates 1002 on both sides rotate in the inner cavity of the support seat 1001. Then, under the action of the rotation of the rotating plates 1002, the first clamping seat 1004 and the second clamping seat 1009 are driven, so that the first clamping seat 1004 and the second clamping seat 1009 clamp and fix the meter under test 11, thereby fixing the meter under test 11, and then the meter under test 11 can be tested.

[0021] In a preferred embodiment: the pushing assembly 8 includes a drive roller 801, a knob 802 is fixedly mounted on the outer wall of the drive roller 801, a drive block 803 is fixedly mounted on the outer wall of the drive roller 801, a one-way ratchet 804 is fixedly mounted on the outer wall of the drive roller 801, a limit groove 805 is formed on the outer wall of the one-way ratchet 804, a fixed cylinder 806 is fixedly mounted on the outer wall of the drive roller 801, an indicator rod 807 is movably sleeved in the inner cavity of the fixed cylinder 806, and a support spring 808 is installed in the inner cavity of the fixed cylinder 806. In the above structure, by rotating the drive roller 801 in the inner cavity of the test box 2, when the meter under test 11 needs to be tested, the drive roller 801 rotates in the inner cavity of the test box 2. During the rotation of the drive roller 801, the outer wall of the drive block 803 contacts the outer wall of the terminal 903, thereby causing the terminal 903 to move outward from the inner cavity of the test box 2 and into the inner cavity of the meter under test 11. As the drive roller 801 rotates, according to the different positions of the drive block 803 on the outer wall of the drive roller 801, multiple combinations can be realized, and the terminal 903 in different positions can be pushed out to realize different wiring combinations, thereby performing wiring measurement operations.

[0022] In a preferred embodiment: the inner wall shape of the limiting groove 805 matches the outer wall shape of the limiting block 7, the two ends of the outer wall of the support spring 808 contact the bottom of the indicator rod 807 and the inner wall of the fixing cylinder 806 respectively, and the support spring 808 is made of high carbon steel, and the outer wall diameter of the indicator rod 807 matches the inner wall diameter of the fixing cylinder 806. In the above structure, the indicator ring 3 set on the outer wall of the detection box 2 and the indicator rod 807 set on the outer wall of the drive roller 801 slide along the inner wall of the indicator ring 3 as the drive roller 801 rotates, thereby indicating the rotation angle of the drive roller 801. The rotation position of the drive block 803 is indicated according to the position of the indicator rod 807, so that the user can better adjust the position of the drive block 803, thereby driving the terminal 903. This allows the terminal 903 at different positions to enter the inner cavity of the meter under test 11 in different combinations, thereby realizing the detection of the meter under test 11.

[0023] In a preferred embodiment: the wiring assembly 9 includes a mounting groove 901, a mounting rod 902 is fixedly mounted on the inner wall of the mounting groove 901, a terminal block 903 is movably sleeved on the outer wall of the mounting rod 902, a detection line 904 is fixedly mounted on the outer wall of the terminal block 903, a return spring 905 is movably sleeved on the outer wall of the mounting rod 902, and an arc-shaped block 906 is fixedly mounted on the outer wall of the terminal block 903. In the above structure, the mounting groove 901 opened on the inner wall of the test box 2 and the mounting rod 902 set on the inner wall of the mounting groove 901, when the knob 802 is rotated, the outer wall of the drive block 803 can push the arc block 906, thereby causing the arc block 906 to drive the terminal 903 to move, so that the terminal 903 extends outward from the inner cavity of the test box 2, and the outer wall of the terminal 903 enters the inner cavity of the meter under test 11. As the drive roller 801 rotates, the drive blocks 803 at different positions on its outer wall can push out the terminal 903 at different positions, so that the terminal 903 contacts the meter under test 11 in different combinations, thereby realizing the wiring measurement of the meter under test 11.

[0024] In a preferred embodiment: the two ends of the outer wall of the reset spring 905 contact the inner wall of the mounting groove 901 and the outer wall of the terminal block 903 respectively, and the reset spring 905 is made of high carbon steel. The outer wall of the detection line 904 passes through the top of the detection box 2 and is connected to the terminal block 903. There are three terminals 903, and the three terminals 903 are movably sleeved in the inner cavity of the detection box 2 respectively. In the above structure, by providing a mounting rod 902 on the inner wall of the mounting groove 901 and a reset spring 905 on the outer wall of the mounting rod 902, the driving block 803 will release the push on the arc-shaped block 906 during the rotation of the driving roller 801. At this time, the terminal 903 will be reset under the action of the reset spring 905, so that the terminal 903 is retracted into the inner cavity of the mounting groove 901, preventing the terminal 903 from continuously protruding from the inner cavity of the detection box 2, thereby protecting the terminal 903 in the inner cavity of the detection box 2.

[0025] In a preferred embodiment: the clamping assembly 10 includes a support base 1001, a rotating plate 1002 is rotatably connected to the inner cavity of the support base 1001, a rotating seat 1003 is rotatably connected to the outer wall of the rotating plate 1002, a first clamping seat 1004 is rotatably connected to the outer wall of the rotating plate 1002, a first screw 1005 is fixedly assembled to the outer wall of the rotating seat 1003, a drive screw cylinder 1006 is threadedly connected to the outer wall of the first screw 1005, a rotating rod 1008 is rotatably connected to the outer wall of the support base 1001, and a second clamping seat 1009 is rotatably connected to the outer wall of the rotating rod 1008. In the above structure, the support seat 1001 provided on the outer wall of the detection seat 1 will cause the first screw 1005 and the second screw 1007 to move outward along the inner wall of the drive screw 1006 when the drive screw 1006 is rotated. This will push the rotating plate 1002 and the rotating rod 1008 to rotate, thereby causing the first clamping seat 1004 and the second clamping seat 1009 to adhere to the outer wall of the meter under test 11, thus fixing the meter under test 11 and ensuring that the meter under test 11 is stably placed on the top of the detection seat 1.

[0026] In a preferred embodiment: the two ends of the inner wall of the drive cylinder 1006 are threaded to the outer walls of the second screw 1007 and the first screw 1005 respectively, and the rotating plate 1002 and the rotating rod 1008 are both made of stainless steel. In the above structure, the rotating plate 1002 and rotating rod 1008 provided on the outer wall of the support base 1001 drive the first screw 1005 and the second screw 1007 on both sides under the action of the driving screw cylinder 1006, thereby causing the support base 1001 and the rotating rod 1008 to rotate, so that the first clamping seat 1004 and the second clamping seat 1009 can clamp and fix the outer wall of the meter under test 11, thereby enabling the meter under test 11 to be tested in a stable state.

[0027] In a preferred embodiment: the two ends of the outer wall of the torsion spring 6 are respectively inserted into the inner cavities of the rotating plate 5 and the fixing rod 4, and the torsion spring 6 is made of high carbon steel; In the above structure, the torsion spring 6 provided on the outer wall of the fixed rod 4 can reset the rotating plate 5 under the action of the torsion spring 6, so that the limiting block 7 enters the inner cavity of the limiting groove 805, thereby limiting the rotation of the one-way ratchet 804, so that the one-way ratchet 804 can only rotate in one direction, thereby causing the drive roller 801 to rotate in one direction in the inner cavity of the detection box 2, thereby driving the terminal 903, causing the terminal 903 to move in the inner cavity of the detection box 2, and thus driving the terminal 903 at different positions.

[0028] In a preferred embodiment: the outer wall shape of the limiting block 7 matches the outer wall shape of the limiting groove 805, and both the rotating plate 5 and the limiting block 7 are made of stainless steel; In the above structure, the one-way ratchet 804 provided on the outer wall of the drive roller 801 is restricted by the rotating plate 5 and the limiting block 7, so that the one-way ratchet 804 can only rotate in one direction, thereby driving the terminal 903 according to the detection sequence, so that the terminal 903 at the corresponding position extends out of the inner cavity of the detection box 2, and then the terminal 903 at different positions enters the inner cavity of the meter under test 11, thereby realizing the detection of the meter under test 11 by the corresponding combination of terminal 903.

[0029] In a preferred embodiment: the installation position of the detection box 2 corresponds to the installation position of the meter to be tested 11, and the outer wall of the indicator ring 3 is provided with a first indicator groove 12 and a second indicator groove 13. In the above structure, by setting an indicator ring 3 on the outer wall of the detection box 2 and opening a first indicator groove 12 on the outer wall of the indicator ring 3, when the drive roller 801 rotates, the indicator rod 807 can slide along the outer wall of the indicator ring 3. During the rotation of the indicator rod 807, the outer wall of the indicator rod 807 can enter the inner cavity of the first indicator groove 12, thereby indicating the position of the drive roller 801. When the indicator rod 807 is in the position of the second indicator groove 13, the outer wall of the drive block 803 will drive the arc block 906. When the indicator rod 807 is in the position of the first indicator groove 12, the drive block 803 will release the drive of the fixed cylinder 806. At this time, the terminal 903 will retract into the inner cavity of the mounting groove 901, thereby protecting the terminal 903.

[0030] Working principle: During use, when the above-mentioned equipment needs to test the meter 11, the meter 11 is placed on top of the testing base 1, with its end aligned with the outer wall of the testing box 2. Then, by rotating the drive screw 1006, the second screw 1007 and the first screw 1005 on both sides are driven. This causes the second screw 1007 and the first screw 1005 to rotate the rotating plates 1002 and the rotating rod 1008 on both sides, thus causing the first clamping seat 1004 and the second clamping seat 1009 to adhere to the outer wall of the meter 11. After fixing the meter under test 11, it can then be tested. Multiple tests on the meter under test 11 are performed according to the testing requirements. By rotating the drive roller 801, the drive block 803 is driven, causing its outer wall to adhere to the outer wall of the arc-shaped block 906. This drives the arc-shaped block 906, causing the terminal 903 to move outward along the outer wall of the mounting rod 902. Because the drive block 803 is positioned differently on the outer wall of the drive roller 801, the drive roller 801 can be in different positions after rotating 90 degrees. The drive block 803 drives the terminals 903, resulting in four different wiring combinations. This allows the four sets of terminals 903 at different positions to enter the inner cavity of the meter under test 11, thus performing wiring detection on different items of the meter under test 11. During the rotation of the drive roller 801, the position of the indicator rod 807 determines whether to drive the terminals 903. When the indicator rod 807 is in the inner cavity of the first indicator slot 12, the terminals 903 are not driven and do not protrude from the inner cavity of the detection box 2. When the indicator rod 807 is in the inner cavity of the second indicator slot 13, the drive block 803 will drive the terminals 903. Driven by 903, the terminal 903 extends out of the inner cavity of the test box 2 and enters the inner cavity of the meter under test 11, thus making it easier to test the wiring of the meter under test 11. When the meter under test 11 is not being tested, the terminal 903 is placed in the inner cavity of the test box 2 by placing the indicator rod 807 in the inner cavity of the first indicator slot 12, which protects the terminal 903. During the test, the unidirectional ratchet 804 is unidirectionally restricted by the rotating plate 5 and the limiting block 7, so that the drive roller 801 rotates unidirectionally, thereby better driving the terminal 903 to achieve different combinations of wiring methods.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A meter testing device, comprising a testing base (1), characterized in that: The top of the detection seat (1) is equipped with a detection box (2), the outer wall of the detection box (2) is fixedly fitted with an indicator ring (3), the outer wall of the detection box (2) is fixedly fitted with a fixing rod (4), the outer wall of the fixing rod (4) is rotatably connected with a rotating plate (5), the outer wall of the fixing rod (4) is movably sleeved with a torsion spring (6), the outer wall of the rotating plate (5) is fixedly fitted with a limit block (7), the inner cavity of the detection box (2) is provided with a pushing assembly (8), the inner cavity of the detection box (2) is provided with a wiring assembly (9), the outer wall of the detection seat (1) is provided with a clamping assembly (10), and the top of the detection seat (1) is equipped with a meter to be tested (11).

2. The meter testing device according to claim 1, characterized in that: The pushing assembly (8) includes a drive roller (801), a knob (802) is fixedly mounted on the outer wall of the drive roller (801), a drive block (803) is fixedly mounted on the outer wall of the drive roller (801), a one-way ratchet (804) is fixedly mounted on the outer wall of the drive roller (801), a limit groove (805) is opened on the outer wall of the one-way ratchet (804), a fixed cylinder (806) is fixedly mounted on the outer wall of the drive roller (801), an indicator rod (807) is movably sleeved in the inner cavity of the fixed cylinder (806), and a support spring (808) is installed in the inner cavity of the fixed cylinder (806).

3. The meter testing device according to claim 2, characterized in that: The inner wall shape of the limiting groove (805) matches the outer wall shape of the limiting block (7). The two ends of the outer wall of the support spring (808) are in contact with the bottom of the indicator rod (807) and the inner wall of the fixing cylinder (806), respectively. The support spring (808) is made of high carbon steel. The outer wall diameter of the indicator rod (807) matches the inner wall diameter of the fixing cylinder (806).

4. The meter testing device according to claim 2, characterized in that: The wiring assembly (9) includes a mounting groove (901), an mounting rod (902) is fixedly mounted on the inner wall of the mounting groove (901), a terminal block (903) is movably sleeved on the outer wall of the mounting rod (902), a detection line (904) is fixedly mounted on the outer wall of the terminal block (903), a return spring (905) is movably sleeved on the outer wall of the mounting rod (902), and an arc-shaped block (906) is fixedly mounted on the outer wall of the terminal block (903).

5. The meter testing device according to claim 4, characterized in that: The two ends of the outer wall of the reset spring (905) are in contact with the inner wall of the mounting groove (901) and the outer wall of the terminal block (903), respectively. The reset spring (905) is made of high carbon steel. The outer wall of the detection line (904) passes through the top of the detection box (2) and is connected to the terminal block (903). There are three terminals (903), and the three terminals (903) are movably sleeved in the inner cavity of the detection box (2).

6. The meter testing device according to claim 5, characterized in that: The clamping assembly (10) includes a support base (1001), a rotating plate (1002) is rotatably connected to the inner cavity of the support base (1001), a rotating seat (1003) is rotatably connected to the outer wall of the rotating plate (1002), a first clamping seat (1004) is rotatably connected to the outer wall of the rotating plate (1002), a first screw (1005) is fixedly assembled to the outer wall of the rotating seat (1003), a drive screw cylinder (1006) is threadedly connected to the outer wall of the first screw (1005), a rotating rod (1008) is rotatably connected to the outer wall of the support base (1001), and a second clamping seat (1009) is rotatably connected to the outer wall of the rotating rod (1008).

7. The meter testing device according to claim 6, characterized in that: The inner walls of the drive cylinder (1006) are threaded to the outer walls of the second screw (1007) and the first screw (1005) respectively. The rotating plate (1002) and the rotating rod (1008) are both made of stainless steel.

8. The meter testing device according to claim 2, characterized in that: The two ends of the outer wall of the torsion spring (6) are respectively inserted into the inner cavity of the rotating plate (5) and the fixed rod (4), and the torsion spring (6) is made of high carbon steel.

9. The meter testing device according to claim 8, characterized in that: The outer wall shape of the limiting block (7) matches the outer wall shape of the limiting groove (805), and both the rotating plate (5) and the limiting block (7) are made of stainless steel.

10. The meter testing device according to claim 9, characterized in that: The installation position of the test box (2) corresponds to the installation position of the meter to be tested (11). The outer wall of the indicator ring (3) has a first indicator groove (12) and a second indicator groove (13).

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