Portable direct-current resistance tester for point switch contact group

Abstract

The utility model discloses a portable direct-current resistance tester for a point switch contact group. The portable direct-current resistance tester comprises a test host and a test clamping assembly, the test clamping assembly comprises a copper chuck, a test chuck, a torsion spring and a test cable; the two test chucks are oppositely and symmetrically arranged, the two ends of the torsion spring are connected with the inner sides of the two test chucks respectively, each test chuck is connected with a copper chuck, the two copper chucks are oppositely and symmetrically arranged, and the two ends of the test cable are connected with the copper chucks and the test host respectively; during testing, the two copper chucks correspondingly clamp a copper stud of a contact group of the point switch. The tester has the advantages that the tester can be used for daily testing of the contact group, discovers the contact group with abnormal resistance in advance and timely replaces the contact group, and equipment failure is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to railway equipment technical field especially relates to a portable direct current resistance tester of switch machine contact group. BACKGROUND

[0002] Railway turnout switch machine is due to the long -term work in the outdoor, the water vapor in the environment can cause the slow corrosion to the internal contact group metal contact, simultaneously, in every contact group closing and disconnecting process, the arc and contact friction to the contact group metal contact loss will lead to the contact group electrical performance decline, when the contact group metal contact resistance is overproof, will influence switch machine indicating circuit, serious time will cause the outdoor breakage indication, influences the train operation. SUMMARY

[0003] The utility model discloses a portable direct current resistance tester of switch machine contact group, which solves the above-mentioned problems in the prior art.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A portable direct current resistance tester of switch machine contact group, comprising a test host and a test clamping assembly; the test clamping assembly comprises a copper clamp head, a test clamp head, a torsion spring and a test cable; two test clamp heads are symmetrically arranged facing each other, the two ends of the torsion spring are respectively connected to the inner sides of the two test clamp heads, and one copper clamp head is connected to each test clamp head; two copper clamp heads are symmetrically arranged facing each other, and the two ends of the test cable are respectively connected to the copper clamp heads and the test host; during testing, the two copper clamp heads correspondingly hold the copper studs of the contact group of the switch machine.

[0006] Preferably, the test clamp head comprises a test connecting arm and a test clamp end, one end of the test connecting arm is connected to the copper clamp head, the other end of the test connecting arm is connected to one end of the test clamp end, the test clamp end is curved in an arc shape, and the inner circumferential sides of the two test clamp ends are arranged facing each other; the two ends of the torsion spring are respectively connected to one end of the two test connecting arms close to the test clamp end.

[0007] Preferably, the copper clamp head comprises a copper connecting arm and a copper clamp end, one end of the copper connecting arm is connected to one end of the test connecting arm away from the test clamp end, the other end of the copper connecting arm is connected to one end of the copper clamp end, the copper clamp end is curved in an arc shape, and the inner circumferential sides of the two copper clamp ends are arranged facing each other; the copper connecting arm is connected to the test cable.

[0008] Preferably, the test clamp assembly further includes a clamp protective shell; the two ends of the clamp protective shell are respectively provided with a clamp channel and a test cable channel communicating with their interiors, and the clamp protective shell is provided with clamp clearance openings communicating with their interiors on opposite sides; the copper clamp end is located outside the clamp protective shell, the copper connecting arm extends into the interior of the clamp protective shell through the clamp channel and is connected to the test connecting arm; the test clamp end extends out of the clamp protective shell through the corresponding clamp clearance opening; the end of the test cable away from the test host extends into the interior of the clamp protective shell through the test cable channel and is connected to the copper connecting arm; the torsion spring is located inside the clamp protective shell.

[0009] Preferably, the test host includes an LCD screen, an integrated circuit board, a rechargeable battery, a power button, a test button, and a host protective case; the LCD screen is embedded in the upper surface of the host protective case, the integrated circuit board, the rechargeable battery, the power button, and the test button are all disposed inside the host protective case, and the power button and the test button extend out of the host protective case through corresponding holes on the upper surface of the host protective case; the LCD screen, the rechargeable battery, the power button, and the test button are all connected to the integrated circuit board, and the integrated circuit board is connected to the test cable.

[0010] Preferably, the test host further includes a quick socket connected to the integrated circuit board, and a quick plug is provided at the end of the test cable away from the copper clamp. The quick plug is plugged into the quick socket to connect the test clamp assembly to the test host.

[0011] Preferably, the host protective case includes a host top cover and a host bottom cover, which are snapped together to form the host protective case; the liquid crystal display screen is embedded in the upper surface of the host top cover, the integrated circuit board is disposed below the liquid crystal display screen, the rechargeable battery, the power button, and the test button are all disposed on the host bottom cover, and the power button and the test button extend out of the host protective case through corresponding holes on the host top cover; the end of the quick socket away from the quick plug passes through the host bottom cover from the side and extends into the host protective case to connect with the integrated circuit board.

[0012] The beneficial effects of this utility model are: 1. The tester can be used for daily testing of contact groups, detect contact groups with abnormal resistance in advance, and replace them in time to prevent equipment failure. 2. The tester has high testing accuracy, simple operation, and is lightweight and portable, which can solve the daily testing problem of switch machine contact groups. Attached Figure Description

[0013] Figure 1This is a structural diagram of the tester in an embodiment of this utility model;

[0014] Figure 2 This is a structural diagram of the test clip assembly in an embodiment of this utility model;

[0015] Figure 3 This is a structural diagram of the test host in an embodiment of this utility model;

[0016] Figure 4 This is a schematic diagram of the tester in use in an embodiment of this utility model.

[0017] In the diagram: 1. Test host; 2. Test clamping assembly; 3. Copper chuck; 4. Torsion spring; 5. Test chuck; 6. Test cable; 7. Quick plug; 8. Main unit top cover; 9. Quick socket; 10. LCD screen; 11. Rechargeable battery; 12. Main unit bottom shell; 13. Power on / off button; 14. Test button; 15. Switch machine; 16. Contact group; 17. Tester. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0019] like Figures 1 to 4 As shown, this embodiment provides a portable DC resistance tester 17 for switch machine contact groups, including a test host 1 and a test clamping assembly 2. When testing the contact group 16 of the switch machine 15 is required, the test host 1 is electrically connected to the test clamping assembly 2, and then the test clamping assembly 2 is clamped onto the copper studs of the contact group 16 of the switch machine 15. The test host 1 is then turned on to perform the test. The tester 17 includes two core components: the test clamping assembly 2 and the test host 1. These will be described in detail below:

[0020] 1. Test clamping component 2

[0021] like Figure 2 As shown, the test clamping assembly 2 includes a copper clamp 3, a test clamp 5, a torsion spring 4, and a test cable 6; two test clamps 5 are symmetrically arranged facing each other, and the two ends of the torsion spring 4 are respectively connected to the inner sides of the two test clamps 5. Each test clamp 5 is connected to a copper clamp 3, and the two copper clamps 3 are symmetrically arranged facing each other. The two ends of the test cable 6 are respectively connected to the copper clamps 3 and the test host 1; during testing, the two copper clamps 3 clamp the copper studs of the contact group 16 of the switch machine 15.

[0022] Specifically: the test clamp 5 includes a test connecting arm and a test clamp end. One end of the test connecting arm is connected to the copper clamp 3, and the other end of the test connecting arm is connected to one end of the test clamp end. The test clamp end is curved in an arc shape, and the inner circumferences of the two test clamp ends are arranged facing each other. The two ends of the torsion spring 4 are respectively connected to the ends of the two test connecting arms near the test clamp ends.

[0023] The copper clamp 3 includes a copper connecting arm and a copper clamp end. One end of the copper connecting arm is connected to the end of the test connecting arm away from the test clamp end, and the other end of the copper connecting arm is connected to one end of the copper clamp end. The copper clamp end is curved in an arc shape, and the inner circumferences of the two copper clamp ends are arranged facing each other. The copper connecting arm is connected to the test cable 6.

[0024] In the non-operating state, the torsion spring 4 is in the extended state, with its two ends connected to the ends of the two test connecting arms near the test clamps, thus keeping the two test clamps in a separated state. In the operating state, the tester pinches the two test clamps together, compressing the torsion spring 4 and thus moving the two copper clamps apart. When the copper stud of the contact group 16 of the switch machine 15 is between the copper clamps, the tester releases the two test clamps, the torsion spring 4 returns to its original position, causing the two copper clamps to move closer together and clamp the copper stud between them. After the test is completed, the same procedure is used to separate the copper clamps from the copper stud.

[0025] In this embodiment, the test clamp 5 assembly further includes a clamp protective shell; both ends of the clamp protective shell are respectively provided with a clamp channel and a test cable 6 channel communicating with their interiors, and the clamp protective shell is provided with clamp clearance openings communicating with their interiors on opposite sides; the copper clamp end is located outside the clamp protective shell, and the copper connecting arm extends into the interior of the clamp protective shell through the clamp channel and is connected to the test connecting arm; the test clamp end extends out of the clamp protective shell through the corresponding clamp clearance opening; the end of the test cable 6 away from the test host 1 extends into the interior of the clamp protective shell through the test cable 6 channel and is connected to the copper connecting arm; the torsion spring 4 is located inside the clamp protective shell.

[0026] The chuck protective shell conceals the relevant components, protecting them and extending their lifespan. The chuck clearance allows the test clamp ends to extend smoothly out of the protective shell, facilitating the operator's gripping of both ends for testing. The protective shell also enhances the overall integrity of the test clamp assembly 2, making it easier to carry and use.

[0027] II. Test Host 1

[0028] like Figure 3As shown, the test host 1 includes an LCD screen 10, an integrated circuit board, a rechargeable battery 11, a power button 13, a test button 14, and a host protective case. The LCD screen 10 is embedded in the upper surface of the host protective case. The integrated circuit board, the rechargeable battery 11, the power button 13, and the test button 14 are all disposed inside the host protective case. The power button 13 and the test button 14 extend out of the host protective case through corresponding holes on the upper surface of the host protective case. The LCD screen 10, the rechargeable battery 11, the power button 13, and the test button 14 are all connected to the integrated circuit board, and the integrated circuit board is connected to the test cable 6.

[0029] The LCD screen 10 displays the DC resistance value of the contact group 16 under test. The power button 13 and test button 14 control the power on / off and test start of the test host 1, respectively. The rechargeable battery 11 provides sufficient power to the test host 1, enabling testing without a wired connection to an external power source. The integrated circuit board calculates the resistance value of the contact group 16 using Ohm's law based on the real-time acquired current and voltage values.

[0030] The test host 1 also includes a quick-connect socket 9 connected to the integrated circuit board. A quick-connect plug 7 is provided at the end of the test cable 6 away from the copper clamp 3. The quick-connect plug 7 is inserted into the quick-connect socket 9, connecting the test clamp assembly 2 to the test host 1. By providing the quick-connect socket 9 and quick-connect plug 7, quick insertion and removal between the test host 1 and the test clamp assembly 2 can be achieved, improving testing efficiency and convenience.

[0031] The host protective case includes a host top cover 8 and a host bottom cover 12, which are snapped together to form the host protective case. The liquid crystal display screen 10 is embedded in the upper surface of the host top cover 8, and the integrated circuit board is disposed below the liquid crystal display screen 10. The rechargeable battery 11, the power button 13, and the test button 14 are all disposed on the host bottom cover 12. The power button 13 and the test button 14 extend out of the host protective case through corresponding holes on the host top cover 8. The end of the quick socket 9 away from the quick plug 7 passes through the side of the host bottom cover 12 and extends into the host protective case to connect with the integrated circuit board.

[0032] The protective case conceals the components, protecting them and extending their lifespan. The openings allow the power button 13 and test button 14 to extend smoothly out of the chuck cover, facilitating power on / off or test execution by the tester. The protective case also enhances the overall integrity of the test unit 1, making it easier to carry and use. The protective case features a separate design for the top cover 8 and the bottom cover 12, facilitating disassembly and maintenance.

[0033] like Figure 4 As shown, during the testing of contact group 16 of switch machine 15, the tester takes out the tester 17, connects the quick plug 7 of the test clamp assembly 2 to the quick socket 9 of the test host 1, then holds the test host 1 in one hand and the test clamp assembly 2 in the other, gently pinching the test clamp end with the thumb and forefinger, opening the copper clamp end, aligning it with the copper stud of contact group 16, releasing the test clamp end, the copper clamp end firmly clamps the copper stud, press the power button on the tester 17 host, and after 2 seconds, press the test button 14. The DC resistance value is displayed on the LCD screen in real time. All contact groups 16 are tested one by one using the same method, and contact groups 16 with excessive resistance values ​​are dealt with promptly. After the test is completed, the power off button is pressed, the test is turned off, the quick plug 7 of the test clamp assembly 2 is unplugged from the quick socket 9 of the test host 1, and the tester 17 is stored away.

[0034] DC resistance sampling principle: A constant current source generates a constant current, which is connected to the copper studs of contact group 16 through the test cable 6 and the copper clamp end to form a closed loop. The current flows through the copper studs, and the microcontroller and high-precision analog-to-digital converter chip in the integrated circuit collect the voltage value change in real time. The resistance value of contact group 16 is calculated using Ohm's law.

[0035] By adopting the above-disclosed technical solution of this utility model, the following beneficial effects are obtained:

[0036] This utility model discloses a portable DC resistance tester for switch machine contact assemblies. The tester can be used for routine testing of contact assemblies, identifying contact assemblies with abnormal resistance in advance and replacing them in time to prevent equipment failure. The tester has high testing accuracy, is simple to operate, and is lightweight and portable, thus solving the problem of routine testing of switch machine contact assemblies.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A portable DC resistance tester for switch machine contact groups, characterized in that: The system includes a test host and a test clamping assembly. The test clamping assembly includes copper clamps, test clamps, torsion springs, and test cables. Two test clamps are symmetrically arranged facing each other. The two ends of the torsion spring are respectively connected to the inner sides of the two test clamps. Each test clamp is connected to a copper clamp. The two copper clamps are symmetrically arranged facing each other. The two ends of the test cable are respectively connected to the copper clamps and the test host. During testing, the two copper clamps clamp the copper studs of the switch machine's contact group.

2. The portable DC resistance tester for switch machine contact groups according to claim 1, characterized in that: The test clamp includes a test connecting arm and a test clamp end. One end of the test connecting arm is connected to the copper clamp, and the other end of the test connecting arm is connected to one end of the test clamp end. The test clamp end is curved in an arc shape, and the inner circumferences of the two test clamp ends are arranged facing each other. The two ends of the torsion spring are respectively connected to the ends of the two test connecting arms near the test clamp ends.

3. The portable DC resistance tester for switch machine contact groups according to claim 2, characterized in that: The copper clamp includes a copper connecting arm and a copper clamp end. One end of the copper connecting arm is connected to the end of the test connecting arm away from the test clamp end, and the other end of the copper connecting arm is connected to one end of the copper clamp end. The copper clamp end is curved in an arc shape, and the inner circumferences of the two copper clamp ends are arranged facing each other. The copper connecting arm is connected to the test cable.

4. The portable DC resistance tester for switch machine contact groups according to claim 3, characterized in that: The test clamping assembly also includes a clamp protective shell; both ends of the clamp protective shell are respectively provided with a clamp channel and a test cable channel communicating with their interiors, and the clamp protective shell is provided with clamp clearance openings communicating with their interiors on opposite sides; the copper clamp end is located outside the clamp protective shell, and the copper connecting arm extends into the interior of the clamp protective shell through the clamp channel and connects to the test connecting arm; the test clamp end extends out of the clamp protective shell through the corresponding clamp clearance opening; the end of the test cable away from the test host extends into the interior of the clamp protective shell through the test cable channel and connects to the copper connecting arm; the torsion spring is located inside the clamp protective shell.

5. The portable DC resistance tester for switch machine contact groups according to any one of claims 1 to 4, characterized in that: The test host includes an LCD screen, an integrated circuit board, a rechargeable battery, a power button, a test button, and a host protective case. The LCD screen is embedded in the upper surface of the host protective case. The integrated circuit board, the rechargeable battery, the power button, and the test button are all located inside the host protective case. The power button and the test button extend out of the host protective case through corresponding holes on the upper surface of the host protective case. The LCD screen, the rechargeable battery, the power button, and the test button are all connected to the integrated circuit board, and the integrated circuit board is connected to the test cable.

6. The portable DC resistance tester for switch machine contact groups according to claim 5, characterized in that: The test host also includes a quick socket connected to the integrated circuit board. The end of the test cable away from the copper clamp is provided with a quick plug. The quick plug is inserted into the quick socket to connect the test clamp assembly to the test host.

7. The portable DC resistance tester for switch machine contact groups according to claim 6, characterized in that: The host protective case includes a host top cover and a host bottom cover, which are snapped together to form the host protective case. The liquid crystal display screen is embedded in the upper surface of the host top cover, and the integrated circuit board is disposed below the liquid crystal display screen. The rechargeable battery, the power button, and the test button are all disposed on the host bottom cover. The power button and the test button extend out of the host protective case through corresponding holes on the host top cover. The end of the quick socket away from the quick plug passes through the host bottom cover from the side and extends into the host protective case to connect with the integrated circuit board.

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