Grounding detection device for electric locomotive

Abstract

The utility model discloses a grounding detection device for an electric locomotive, which relates to the technical field of electric locomotive maintenance and comprises a pincerlike grounding resistance tester main body, and the upper part of the pincerlike grounding resistance tester main body is sleeved with a protection adjusting device. The protection adjusting device comprises a folding protection sleeve arranged on the pincerlike grounding resistance tester body in a sleeving mode, the top of the folding protection sleeve is fixed to the pincerlike grounding resistance tester body, a limiting sleeve is fixed to the bottom of the folding protection sleeve, and the limiting sleeve is arranged on the pincerlike grounding resistance tester body in a sleeving mode. A jaw protection structure is fixed on one surface of the top of the folding protection sleeve; according to the utility model, when the trigger needs to be pressed for a long time to unfold the detection jaw for use, after the trigger is pressed down, the limiting sleeve is grabbed and slides to the position of the trigger, and after fingers are loosened, the trigger is blocked and limited by the protective sleeve, so that the trigger cannot return, the detection jaw is in an open state, workers do not need to press the trigger for a long time, time and labor are relatively saved, and grounding detection is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of electric locomotive maintenance technology, and in particular to a grounding detection device for electric locomotives. Background Technology

[0002] In the maintenance and repair of electric locomotives, the reliability of the grounding system is one of the key factors ensuring the safe operation of the locomotive. Poor grounding or excessive grounding resistance may lead to insufficient current leakage, which can cause equipment failure, personal injury accidents, or affect the stable operation of the power system. Therefore, it is particularly important to regularly inspect the grounding system of electric locomotives.

[0003] Currently, the testing device for the grounding system of electric locomotives is a clamp-on grounding resistance tester. When using it, the operator grasps the clamp-on grounding resistance tester, presses the trigger to retract, and drives the test jaws to open. The opened test jaws are then inserted into the grounding cable for testing. The testing principle is as follows: by measuring the circuit resistance, the voltage coil and current coil are used to induce electromotive force and current, and the resistance value to be measured is calculated.

[0004] When using a clamp-on grounding resistance tester to open the jaws and insert the cable, some grounding cables have limited space. Operators need to hold down the trigger for an extended period to adjust the angle and allow the cable to pass smoothly. However, holding the tester and continuously pressing the trigger to keep the jaws open increases labor intensity and can lead to hand fatigue, affecting the accuracy and efficiency of the test. Furthermore, clamp-on grounding resistance testers lack dust protection. When not in use and exposed to the elements for extended periods, the display screen, control buttons, and jaws easily accumulate dust, affecting the accuracy of the test results and extending the equipment's lifespan.

[0005] Therefore, it is necessary to design a grounding detection device for electric locomotives that is easy to press the trigger and has a dustproof function. Summary of the Invention

[0006] This invention provides a grounding detection device for electric locomotives, which solves the aforementioned technical problems.

[0007] To solve the above-mentioned technical problems, this utility model provides a grounding detection device for electric locomotives, including a clamp-type grounding resistance tester body. The clamp-type grounding resistance tester body is provided with a display screen and control keys at the top and bottom. The top of the clamp-type grounding resistance tester body is equipped with a detection jaw composed of two semi-circular clamps. A trigger is installed on the side of the clamp-type grounding resistance tester body, and the trigger is connected to one of the semi-circular clamps. A protective adjustment device is fitted on the upper part of the clamp-type grounding resistance tester body. The protective adjustment device includes a folding protective sleeve fitted on the clamp-type grounding resistance tester body. The top of the folding protective sleeve is fixed to the clamp-type grounding resistance tester body, and a limit sleeve is fixed to the bottom of the folding protective sleeve. The limit sleeve is fitted on the clamp-type grounding resistance tester body. A jaw protection structure is fixed on one side of the top of the folding protective sleeve.

[0008] Preferably, the side end of the folding protective sleeve has a through opening corresponding to the trigger.

[0009] Preferably, the extended length of the folded protective sleeve is greater than or equal to the height of the clamp-on grounding resistance tester body.

[0010] Preferably, the jaw protection structure includes a protective elastic sleeve fixedly connected to the folding protective sleeve, the opening of the protective elastic sleeve is provided with an elastic constriction, and a sponge block is fixed in the middle of the protective elastic sleeve extending out of the elastic constriction.

[0011] Preferably, the protective elastic sleeve can completely cover the sponge block.

[0012] Preferably, the size of the sponge block matches the size of the opening in the middle of the clamp-on grounding resistance tester body.

[0013] Compared with related technologies, the grounding detection device for electric locomotives provided by this utility model has the following advantages:

[0014] This utility model provides a method where, when it is necessary to press and hold the trigger to open the testing jaws, after pressing the trigger, the limiting sleeve is grasped and slid down to the trigger position. After the finger is released, the trigger is blocked and limited by the protective sleeve, so it cannot return to its original position, and the testing jaws are in the open state. This eliminates the need for the operator to press and hold the trigger continuously, saving time and effort and facilitating grounding testing.

[0015] This utility model provides that when the device is not in use, pressing the trigger retracts the limit sleeve, causing it to slide down to the bottom and fully unfold the folded protective cover to cover the main body of the clamp-on ground resistance tester. At this time, the through opening is located at the trigger position. When the finger releases the trigger, the clamp-on ground resistance tester pops out from the through opening. The folded protective cover can cover the main body of the clamp-on ground resistance tester to prevent dust, and prevent the display screen and control keys from getting dusty and affecting their use.

[0016] This utility model provides a jaw protection structure that can protect the detection jaws. The elastic opening of the protective elastic sleeve is widened and the protective elastic sleeve is flipped upward to fit the detection jaws. A sponge block is inserted into the middle of the detection jaws. The protective elastic sleeve protects the detection jaws from dust, and the sponge block is inserted into the detection jaws to clean the dust adhering to the detection lines by contact and friction, keeping them clean. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a grounding detection device for electric locomotives according to this utility model;

[0018] Figure 2 This is a semi-expanded schematic diagram of the protective adjustment device in a grounding detection device for electric locomotives according to this utility model;

[0019] Figure 3 This is a schematic diagram showing the fully unfolded protective adjustment device in a grounding detection device for electric locomotives according to this utility model;

[0020] Figure 4 This is a schematic diagram of the protective adjustment device of this utility model;

[0021] Figure 5 This is a side view sectional diagram of the protective adjustment device of this utility model.

[0022] The following are labeled in the diagram: 1. Main body of clamp-on grounding resistance tester; 2. Display screen; 3. Control key; 4. Trigger; 5. Protective adjustment device; 51. Limiting sleeve; 52. Folding protective sleeve; 521. Through opening; 53. Clamp jaw protection structure; 531. Protective elastic sleeve; 532. Sponge block; 533. Elastic clamp; 6. Detection clamp. Detailed Implementation

[0023] Example 1, by Figure 1-5 A grounding detection device for electric locomotives is provided, comprising a clamp-type grounding resistance tester body 1. The clamp-type grounding resistance tester body 1 is provided with a display screen 2 and control keys 3 at the top and bottom. The top of the clamp-type grounding resistance tester body 1 is equipped with a detection jaw 6 composed of two semi-circular clamps. A trigger 4 is installed on the side of the clamp-type grounding resistance tester body 1. The trigger 4 is connected to one of the semi-circular clamps. A protective adjustment device 5 is provided on the upper part of the clamp-type grounding resistance tester body 1. The protective adjustment device 5 includes a folding protective sleeve 52 fitted on the clamp-type grounding resistance tester body 1. The top of the folding protective sleeve 52 is fixed to the clamp-type grounding resistance tester body 1. The bottom of the folding protective sleeve 52 is fixed with a limit sleeve 51. The limit sleeve 51 is fitted on the clamp-type grounding resistance tester body 1. A jaw protection structure 53 is fixed on one side of the top of the folding protective sleeve 52.

[0024] Specifically, the staff grasps the main body 1 of the clamp-on grounding resistance tester to perform grounding testing on the electric locomotive's power system grounding. By pressing and retracting the trigger 4, the testing jaws 6 open, allowing the open jaws to be inserted into the grounding cable for testing. The testing principle of the clamp-on grounding resistance tester 1 is to calculate the resistance value by measuring the circuit resistance and inducing potential and current using voltage and current coils. This testing device is a current product, and its principle is common knowledge in the field, requiring no further explanation. When it is necessary to press and hold the trigger 4 to open the testing jaws 6, the protective adjustment device 5 can be used for assistance. After pressing the trigger 4, the limit sleeve 51 is grasped and slid down to the trigger 4 position. After releasing the finger... Trigger 4 is blocked and limited by the protective sleeve, thus preventing it from returning to its original position. The detection jaws 6 are in the open state, eliminating the need for staff to hold down the trigger for an extended period, saving time and effort and facilitating grounding testing. When not in use, press the trigger 4 again and then grasp the limiting sleeve 51 to push it away from the trigger 4 position. When the device is not in use, press the trigger 4 to retract it, causing the limiting sleeve 51 to slide down to the bottom, which in turn causes the folded protective sleeve 52 to fully unfold and cover the main body 1 of the clamp-on grounding resistance tester. At this time, the through opening 521 is located at the trigger 4 position. When the finger is released, the trigger 4 pops out from the through opening 521. The folded protective sleeve can cover the main body 1 of the clamp-on grounding resistance tester to prevent dust from getting on the display screen 2 and control keys 3, thus preventing them from being affected by dust.

[0025] In this embodiment, the side end of the folding protective sleeve 52 has a through opening 521 corresponding to the trigger 4.

[0026] In this embodiment, the extended length of the folded protective sleeve 52 is greater than or equal to the height of the clamp-on grounding resistance tester body 1.

[0027] In Embodiment 2, based on Embodiment 1, the jaw protection structure 53 includes a protective elastic sleeve 531 fixedly connected to the folded protective sleeve 52. The opening of the protective elastic sleeve 531 is provided with an elastic constriction 533, and a sponge block 532 is fixed in the middle of the protective elastic sleeve 531, extending out of the elastic constriction 533.

[0028] Specifically, the jaw protection structure 53 can protect the detection jaws 6. The elastic opening 533 of the protective elastic sleeve 531 is stretched and the protective elastic sleeve 531 is flipped upward to fit the detection jaws 6. The sponge block 532 is inserted into the middle of the detection jaws 6. The protective elastic sleeve 531 provides dust protection for the detection jaws 6, and the sponge block 532 is inserted into the detection jaws 6 to contact and rub, cleaning the dust on the detection line and keeping it clean.

[0029] In this embodiment, the protective elastic sleeve 531 can completely cover the sponge block 532, the elastic opening 533 of the protective elastic sleeve 531 is stretched, and the protective elastic sleeve 531 is flipped upward to completely fit the detection jaw 6.

[0030] In this embodiment, the size of the sponge block 532 matches the opening in the middle of the clamp-on grounding resistance tester body 1; the sponge block 532 is inserted into the test jaw 6 and rubs against it to clean the dust adhering to the test line.

[0031] In this embodiment, a clamp-on grounding resistance tester of model SW-200 is used as the main body.

[0032] Working principle:

[0033] The staff grasped the main body 1 of the clamp-on grounding resistance tester to perform grounding detection on the power system grounding of the electric locomotive. By pressing the trigger 4 to retract the clamp, the detection jaws 6 were opened. The open detection jaws 6 were then inserted into the grounding cable for testing. The detection principle of the main body 1 of the clamp-on grounding resistance tester is that by measuring the circuit resistance, the voltage coil and the current coil are used to induce the potential and current, and the resistance value is calculated. This detection device is an existing product, and its principle is common knowledge in this field, so there is no need to elaborate further.

[0034] When it is necessary to press and hold the trigger 4 to open the test jaws 6, the protective adjustment device 5 can be used for assistance. After pressing the trigger 4, grasp the limit sleeve 51 and slide it down to the position of the trigger 4. After releasing the finger, the trigger 4 is blocked and limited by the protective sleeve, so it cannot return to the position. The test jaws 6 are in the open state, which does not require the staff to press and hold for a long time. It is relatively time-saving and labor-saving, and convenient for grounding testing. When not in use, press and hold the trigger 4 again, and then grasp the limit sleeve 51 and push it up to remove it from the position of the trigger 4.

[0035] When the device is not in use, press the trigger 4 to retract it, and slide the limit sleeve 51 down to the bottom, causing the folded protective sleeve 52 to fully unfold and cover the clamp-on ground resistance tester body 1. At this time, the through opening 521 is located at the trigger 4 position. When the finger is released from the trigger 4, it pops out from the through opening 521. The folded protective sleeve can cover the clamp-on ground resistance tester body 1 to prevent dust and prevent the display screen 2 and control keys 3 from getting dusty and affecting their use.

[0036] The jaw protection structure 53 can protect the detection jaws 6. The elastic opening 533 of the protective elastic sleeve 531 is stretched and the protective elastic sleeve 531 is flipped upward to fit the detection jaws 6. The sponge block 532 is inserted into the middle of the detection jaws 6. The protective elastic sleeve 531 provides dust protection for the detection jaws 6, and the sponge block 532 is inserted into the detection jaws 6 and makes friction contact with them to clean the dust on the detection line and keep it clean.

Claims

1. A grounding detection device for electric locomotives, comprising a clamp-on grounding resistance tester body (1), wherein the clamp-on grounding resistance tester body (1) is provided with a display screen (2) and control keys (3) at the top and bottom, and a detection jaw (6) composed of two semi-circular clamps is installed on the top of the clamp-on grounding resistance tester body (1), and a trigger (4) is installed on the side end of the clamp-on grounding resistance tester body (1), the trigger (4) being connected to one of the semi-circular clamps in a transmission connection, characterized in that: The clamp-on ground resistance tester body (1) is fitted with a protective adjustment device (5) on the upper part. The protective adjustment device (5) includes a folding protective sleeve (52) fitted on the clamp-on ground resistance tester body (1). The top of the folding protective sleeve (52) is fixed to the clamp-on ground resistance tester body (1). The bottom of the folding protective sleeve (52) is fixed with a limiting sleeve (51). The limiting sleeve (51) is fitted on the clamp-on ground resistance tester body (1). The top side of the folding protective sleeve (52) is fixed with a clamp jaw protection structure (53).

2. The grounding detection device for electric locomotives according to claim 1, characterized in that, The folding protective sleeve (52) has a through opening (521) on its side end, which corresponds to the trigger (4).

3. The ground detection device for an electric locomotive according to claim 1, wherein The extended length of the folded protective sleeve (52) is greater than or equal to the height of the clamp-on grounding resistance tester body (1).

4. The ground detection device for an electric locomotive according to claim 1, wherein The jaw protection structure (53) includes a protective elastic sleeve (531) fixedly connected to the folding protective sleeve (52). The opening of the protective elastic sleeve (531) is provided with an elastic constriction (533), and a sponge block (532) is fixed in the middle of the protective elastic sleeve (531) and extends out of the elastic constriction (533).

5. A grounding detection device for electric locomotives according to claim 4, characterized in that, The protective elastic sleeve (531) can completely cover the sponge block (532).

6. The ground detection device for an electric locomotive according to claim 4, wherein The size of the sponge block (532) matches the size of the opening in the middle of the clamp-on grounding resistance tester body (1).

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