Preventive test equipment for electrical equipment

Abstract

The invention relates to the technical field of electrical tests, in particular to preventive test equipment for electrical equipment. Comprising a frame body, the frame body is provided with a motor, and an output shaft of the motor is fixedly connected with a rotating piece; the sliding part is connected to the frame body in a sliding manner; the support is rotationally connected to the sliding part, and the rotating part and the support are jointly rotationally connected with a detection rod; the handle is fixedly connected to the detection rod; the limiting mechanism is arranged on the side, close to the motor, of the frame body and used for changing the motion trail of the detection rod. The rotating part drives the detection rod to move together, so that one end, far away from the rotating part, of the detection rod performs annular motion, disturbance is applied to the to-be-tested electrical equipment, accidental motion caused by factors such as airflow in a real environment is simulated, and defects, which are difficult to find in a static test, of the to-be-tested electrical equipment are effectively explored; and the reliability and the safety in actual operation are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical testing, and in particular to preventive testing equipment for electrical equipment. Background Art

[0002] Electrical equipment generally refers to various devices involved in the production, transmission, distribution, control or use of electric energy. During use, electrical equipment will inevitably age over time, resulting in reduced electrical performance, which may cause failures and lead to dangers. Therefore, it is necessary to conduct preventive tests on electrical equipment regularly to detect hidden dangers such as insulation degradation, mechanical wear, and performance degradation in advance to avoid major accidents.

[0003] Existing preventive test equipment for electrical equipment usually only applies a target voltage (current) to the electrical equipment to be tested, and then observes the electrical performance data fed back by the electrical equipment to analyze the electrical equipment and determine whether the electrical equipment is in a normal working state (testing its dielectric strength). However, the working environment of some electrical equipment is in the outside world, that is, it is often disturbed by external environmental factors (such as wind). Existing preventive test equipment cannot simulate the actual use environment of the electrical equipment, which leads to the singleness of the test results and the lack of representativeness of the test data, which in turn affects the accuracy of the judgment on whether the electrical equipment can operate normally. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the above technical background, the present invention provides a preventive test device for electrical equipment.

[0005] The technical implementation scheme of the present invention is: a preventive test device for electrical equipment, comprising:

[0006] A frame, wherein a motor is mounted on the frame, and an output shaft of the motor is fixedly connected to a rotating member;

[0007] a sliding member, slidably connected to the frame;

[0008] A bracket is rotatably connected to the sliding member, the rotating member and the bracket are rotatably connected to a detection rod, and the detection rod is electrically connected to the test instrument through a connecting wire;

[0009] A handle fixedly connected to the detection rod;

[0010] a fixing mechanism, provided on the sliding member, for changing the relative resistance between the sliding member and the frame, thereby changing the relative motion relationship between the two;

[0011] A limiting mechanism is provided on a side of the frame close to the motor and is used to change the motion trajectory of the detection rod;

[0012] The clamping mechanism is provided on the detection rod and is used for clamping the connector of the electrical equipment to be tested.

[0013] Furthermore, the fixing mechanism includes:

[0014] a damping member slidably connected to the bracket, the bracket being provided with a first cavity, the damping member sliding in the first cavity, a first elastic element being fixedly connected between the damping member and the bracket, the bracket being provided with a second cavity, the second cavity being communicated with the first cavity, a third cavity being jointly provided between the detection rod and the handle, the third cavity being communicated with the second cavity;

[0015] The liquid capsule is fixedly connected to the handle, and the liquid capsule is communicated with the third cavity.

[0016] Furthermore, a rubber pad is provided on one end of the damping member away from the first elastic element, and a friction surface is provided on the frame for contacting the rubber pad on the damping member.

[0017] Furthermore, the limiting mechanism includes:

[0018] The limit frame is fixedly connected to the side of the frame body close to the motor. The limit frame is provided with a limit slot. The rotating part is a telescopic rod. The telescopic end thereof is rotatably connected to the detection rod. A protrusion is fixedly connected to the telescopic end. The limit slot is used to limit the protrusion. The limit slot is composed of a first slot, a second slot arranged in a mirror image, and a third slot connected to each other.

[0019] Furthermore, the first groove and the third groove are both arc-shaped grooves, the second groove is an inclined groove, and the first groove, the second groove and the third groove are all used to limit the protrusion on the telescopic end of the rotating member.

[0020] Furthermore, the clamping mechanism includes:

[0021] a first clamping plate, slidably connected to the detection rod, and a second elastic element fixedly connected between the first clamping plate and the detection rod;

[0022] A second splint is fixedly connected to the detection rod, a gathering belt is fixedly connected to the first splint, the gathering belt is slidably connected to the second splint, the detection rod is slidably connected to a traction rope, and both ends of the gathering belt are fixedly connected to the traction rope and the first splint respectively;

[0023] The limiting assembly is arranged on the handle and is used to reel in and release the traction rope, thereby changing the clamping state of the connector of the electrical device to be tested.

[0024] Furthermore, the gathering belt is made of an elastic metal conductive material and is arc-shaped, and is used to wrap the connector of the electrical equipment to be tested.

[0025] Furthermore, copper plates are fixedly connected to opposite sides of the first clamping plate and the second clamping plate to adapt to the characteristics of the connector of the electrical equipment to be tested.

[0026] Furthermore, the limiting component includes:

[0027] a winding member, rotatably connected to the handle, for winding the traction rope, wherein a third elastic element is fixedly connected between the winding member and the handle;

[0028] a sliding rod spline-connected to the winding member, wherein a fourth elastic element is fixedly connected between the sliding rod and the winding member;

[0029] The ratchet is fixedly connected to the sliding rod, and the handle is rotatably connected to a pawl, which is used to limit the ratchet. A fifth elastic element is fixedly connected between the pawl and the handle.

[0030] Furthermore, a limiting hole is provided at an eccentric position on the winding member to facilitate the winding member to wind up the traction rope.

[0031] Compared with the prior art, the present invention has at least the following effects: the present invention drives the detection rod to move together with the rotating member, so that the detection rod moves in a circular motion away from one end of the rotating member, thereby applying disturbance to the electrical equipment to be tested, simulating unexpected movement caused by factors such as airflow in a real environment, and thus effectively discovering defects of the electrical equipment to be tested that are difficult to find in static tests, thereby ensuring its reliability and safety in actual operation; the rubber pad on the damping member contacts the friction surface on the frame, and the friction between the two is used to make the sliding member and the frame relatively fixed, thereby ensuring the relative position relationship between the electrical equipment to be tested and the device during the test, thereby improving the reliability and safety of the electrical equipment to be tested. High accuracy of test data; the rotating part is limited by the third slot, so that the telescopic end of the rotating part begins to protrude outward, thereby increasing the movement range of the end of the detection rod away from the rotating part, thereby simulating the swaying state of the electrical equipment to be tested when subjected to strong winds, so that the data obtained from the test is more in line with the actual situation, and further improves the accuracy of the test; the copper plates on the first clamping plate and the second clamping plate are used to increase the contact area during clamping, thereby improving the stability of clamping the connector of the electrical equipment to be tested, and reducing the phenomenon of disconnection or unstable connection in the subsequent test due to vibration caused by simulating the real environment, resulting in interruption of the test process and affecting the normal progress of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0033] Figure 2 Schematic diagram of the three-dimensional structure of the sliding member, bracket and detection rod of the present invention;

[0034] Figure 3 A sectional view of the three-dimensional structure of the frame, bracket and detection rod of the present invention;

[0035] Figure 4 A three-dimensional structural cross-sectional view of the sliding member and the bracket of the present invention;

[0036] Figure 5 This is a sectional view of the three-dimensional structure of the detection rod and the handle of the present invention;

[0037] Figure 6 It is a schematic diagram of the three-dimensional structure of the frame body and the limiting frame of the present invention;

[0038] Figure 7 A sectional view of the three-dimensional structure of the bracket and the detection rod of the present invention;

[0039] Figure 8 A sectional view of the three-dimensional structure of the detection rod and the second splint of the present invention;

[0040] Figure 9 It is a sectional view of the three-dimensional structure of the handle and the winding piece of the present invention.

[0041] The meaning of the reference numerals in the figure are as follows: 101: testing instrument, 102: connecting line, 1: frame, 2: motor, 3: rotating part, 4: sliding part, 5: bracket, 6: detection rod, 7: handle, 801: damping part, 802: first cavity, 803: first elastic element, 804: second cavity, 805: third cavity, 806: liquid capsule, 901: limiting frame, 902: limiting groove, 9021: first groove, 9022: second groove, 9023: third groove, 1001: first splint, 1002: second elastic element, 1003: second splint, 1004: gathering belt, 1005: traction rope, 1101: winding part, 1102: third elastic element, 1103: sliding rod, 1104: fourth elastic element, 1105: ratchet, 1106: pawl, 1107: fifth elastic element. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] like Figure 1 、 Figure 2 and Figure 6 As shown, a preventive test device for electrical equipment is proposed to solve the problem that existing preventive test equipment cannot be used to test in the actual use environment of electrical equipment, which leads to the singleness of test results and the lack of representativeness of test data, thereby affecting the accuracy of judgment on whether the electrical equipment can operate normally. The device includes: a frame 1, the frame 1 is equipped with a motor 2, and the output shaft of the motor 2 is fixedly connected to a rotating member 3; a sliding member 4, which is slidably connected to the frame 1; a bracket 5, which is rotatably connected to the sliding member 4, and the rotating member 3 and the bracket 5 are rotatably connected to a detection rod 6, and the detection rod 6 is electrically connected to the test instrument 101 through a connecting line 102; a handle 7, which is fixedly connected to the detection rod 6; a fixing mechanism, which is arranged on the sliding member 4, and is used to change the relative resistance between the sliding member 4 and the frame 1, thereby changing the relative motion relationship between the two; a limiting mechanism, which is arranged on the side of the frame 1 close to the motor 2, and is used to change the motion trajectory of the detection rod 6; a clamping mechanism, which is arranged on the detection rod 6, and is used to clamp the connector of the electrical equipment to be tested (for ease of description, the following description uses a cable).

[0044] In the above scheme, the outside world has an independent power supply for supplying power to the cable. The test instrument 101 is a prior art and is used to test electrical equipment (the test instrument 101 is used to test the dielectric strength of electrical equipment). Its detailed working principle is not overly elaborated here. A support frame is provided on the left side of the upper side of the frame 1 to support the left end of the detection rod 6. The connection point between the rotating part 3 and the detection rod 6 is located on the right side of the detection rod 6. The connection point between the bracket 5 and the detection rod 6 is located in the middle of the detection rod 6. The detection rod 6 is made of conductive material. The connection line 102 and the test instrument 101 are detachable. The frame 1, motor 2, and rotor are connected to each other. The moving part 3, the sliding part 4, the bracket 5 and the detection rod 6 constitute a crank rocker mechanism, which makes the left end of the detection rod 6 move in a circular motion. When it is necessary to use this equipment to perform a preventive test on the cable, the staff will move the equipment to the area to be tested, then connect the connection line 102 with the test instrument 101, and then separate the cable in the circuit system (making the cable in an inoperative state). After completing the preparation work, the staff will hold the handle 7 and pull the detection rod 6 upward (and release the relatively fixed state between the sliding part 4 and the frame 1 through the fixing mechanism), and the detection rod 6 will rotate clockwise with the connection point between it and the rotating part 3 as the rotation center (such as Figure 1(Taking the front view direction as an example), the detection rod 6 drives the bracket 5 to move together, the bracket 5 starts to rotate counterclockwise, and the bracket 5 drives the sliding member 4 to move to the right, and the sliding member 4 and the frame 1 slide relative to each other until the detection rod 6 rotates clockwise to the position connected to the cable connector (the established position is used for description below), and then the sliding member 4 and the frame 1 are relatively fixed through the fixing mechanism, and finally the clamping mechanism is used to clamp the cable connector, so that the cable is connected to the test instrument 101 through the detection rod 6 and the connecting line 102.

[0045] After the connection is completed, the cable is powered by an external power source, so that the cable works at a power higher than that in the normal circuit system. At the same time, the working state of the cable is analyzed by the test instrument 101 and a numerical value is obtained, so as to perform a preventive test on the cable to ensure the working state of the cable. During the test, the output shaft of the motor 2 is used to drive the rotating member 3 to rotate counterclockwise (such as Figure 1 (Taking the front view direction as an example), the rotating part 3 drives the detection rod 6 to move together, so that the left end of the detection rod 6 performs a circular motion, even the cable joint performs a circular motion, thereby applying disturbance to the cable, simulating the unexpected movement caused by airflow and other factors in the real environment, and thus effectively discovering the defects of the cable that are difficult to find in the static test, thereby ensuring its reliability and safety in actual operation. After the test is completed, the relatively fixed state between the sliding part 4 and the frame 1 is released through the fixing mechanism, and then the staff holds the handle 7 to lower the detection rod 6, and the detection rod 6 and the bracket 5 are gradually reset. The sliding part 4 slides to the left relative to the frame 1 until all parts are reset, then the motor 2 is turned off and the equipment is moved away.

[0046] like Figure 3-Figure 5 As shown, the fixing mechanism includes: a damping member 801, which is slidably connected to the bracket 5, and the bracket 5 is provided with a first cavity 802. The damping member 801 slides in the first cavity 802. A first elastic element 803 is fixedly connected between the damping member 801 and the bracket 5, and the bracket 5 is provided with a second cavity 804. A rubber pad is provided at one end of the damping member 801 away from the first elastic element 803. A friction surface is provided on the frame 1 for contacting the rubber pad on the damping member 801. The second cavity 804 is communicated with the first cavity 802. A third cavity 805 is commonly provided between the detection rod 6 and the handle 7, and the third cavity 805 is communicated with the second cavity 804; a liquid capsule 806, which is fixedly connected to the handle 7. The liquid capsule 806 is filled with a fluid medium, and the liquid capsule 806 is communicated with the third cavity 805.

[0047] In the above scheme, the first elastic element 803 is a spring, and it is in a compressed state, used to apply pressure to the damping member 801. The friction surface on the frame 1 is a frosted surface, which is used to increase the friction coefficient between the frame 1 and the rubber pad on the damping member 801, thereby increasing the resistance of the damping member 801 when moving relative to the frame 1. The fluid medium in the liquid capsule 806 can be hydraulic oil. The liquid capsule 806 is made of elastic rubber. In the process of the staff holding the handle 7 (before moving the detection rod 6), the staff also holds and squeezes the liquid capsule 806. The liquid capsule 806 is deformed and the hydraulic oil inside passes through the third cavity 805 and the second cavity 804 in turn and then enters the first cavity 802. During the process, the hydraulic oil squeezes the damping member 801, and the damping member 801 and the bracket 5 slide relative to each other, and further compresses the first elastic element 803. The damping member 801 drives the rubber pad thereon to move together, and the rubber pad on the damping member 801 is out of contact with the friction surface on the frame 1. Then the staff rotates the detection rod 6 clockwise.

[0048] After the detection rod 6 rotates clockwise to the predetermined position, the staff releases the liquid capsule 806, and the liquid capsule 806 loses the squeezing of the hydraulic oil. The damping member 801 gradually resets under the action of the elastic force of the first elastic element 803. During the process, the hydraulic oil returns to the original path and contacts the friction surface on the frame 1 through the rubber pad on the damping member 801. The friction between the two is used to relatively fix the sliding member 4 and the frame 1, thereby ensuring the relative position relationship between the cable and the equipment during the cable test, thereby improving the accuracy of the test data.

[0049] like Figure 1 and Figure 6 As shown, the limiting mechanism includes: a limiting frame 901, which is fixedly connected to the side of the frame 1 close to the motor 2, and the limiting frame 901 is provided with a limiting slot 902. The rotating part 3 is a telescopic rod, and the telescopic end thereof is rotatably connected to the detection rod 6. A protrusion is fixedly connected to the telescopic end thereof, and the limiting slot 902 is used to limit the protrusion. The limiting slot 902 is composed of a first slot 9021, a second slot 9022 arranged in a mirror image, and a third slot 9023 connected to each other. The first slot 9021 and the third slot 9023 are both arc-shaped slots, and the second slot 9022 is an inclined slot. The first slot 9021, the second slot 9022 and the third slot 9023 are all used to limit the protrusion of the telescopic end on the rotating part 3.

[0050] In the above scheme, the first groove 9021 and the third groove 9023 are both arc grooves, and the radius of the circle corresponding to the third groove 9023 is greater than the radius of the circle corresponding to the first groove 9021. The second groove 9022 is a connecting groove between the first groove 9021 and the third groove 9023. The arc of the third groove 9023 is one tenth of the arc of the first groove 9021, which is used to change the motion trajectory of the detection rod 6. During the counterclockwise rotation of the output shaft of the motor 2, the output shaft of the motor 2 drives the rotating member 3 to rotate counterclockwise together. The protrusion on the telescopic end of the rotating member 3 rotates and slides counterclockwise in the first groove 9021. As the rotating member 3 rotates and slides counterclockwise, Continue to rotate counterclockwise. After the protrusion on the telescopic end of the rotating part 3 moves into the second groove 9022 on the upper side, the telescopic end of the rotating part 3 begins to extend outward, thereby increasing the movement range of the left end of the detection rod 6, thereby simulating the swaying state of the cable when subjected to strong winds, making the test data more in line with the actual situation, and further improving the test accuracy. As the rotating part 3 continues to rotate counterclockwise, the protrusion on the telescopic end of the rotating part 3 gradually passes through the second groove 9022, the third groove 9023 and the second groove 9022 on the upper side and then enters the first groove 9021 again, and then the cycle is repeated until the test is completed.

[0051] like Figure 7 and Figure 8 As shown, the clamping mechanism includes: a first clamping plate 1001, which is slidably connected to the detection rod 6, and a second elastic element 1002 is fixedly connected between the first clamping plate 1001 and the detection rod 6; a second clamping plate 1003, which is fixedly connected to the detection rod 6, and the opposite sides of the first clamping plate 1001 and the second clamping plate 1003 are fixedly connected to copper plates, which are used to adapt to the characteristics of the connector of the electrical equipment to be tested (such as the connector of the cable is usually plate-shaped and has a through hole on it), and the first clamping plate 1001 is fixedly connected to a retraction belt 1004. The retraction belt 1004 is slidably connected to the second clamping plate 1003. The retraction belt 1004 is made of elastic metal conductive material and is arc-shaped, and is used to wrap the connector of the electrical equipment to be tested. The detection rod 6 is slidably connected with the traction rope 1005. The left and right ends of the retraction belt 1004 are respectively fixedly connected to the traction rope 1005 and the first clamping plate 1001; the limiting component is arranged on the handle 7, and is used to reel in and release the traction rope 1005, thereby changing the clamping state of the connector of the electrical equipment to be tested.

[0052] In the above scheme, the second elastic element 1002 is a tension spring, which is used to reset the first splint 1001, and the gathering belt 1004 is a copper belt, which is used to wrap the connector plate on the cable. The gathering belt 1004 can undergo elastic deformation, and the traction rope 1005 is made of non-metallic material. After the detection rod 6 rotates clockwise to a predetermined position, the cable connector is placed between the first splint 1001, the second splint 1003 and the gathering belt 1004. Then the staff reels in the traction rope 1005 through the limiting component. The traction rope 1005 pulls the gathering belt 1004 and makes the left end of the gathering belt 1004 slide upward along the second splint 1003, that is, the gathering belt 1004 gradually retracts, and at the same time, the first splint 1001 gradually moves to the left under the action of the pulling of the gathering belt 1004, and the second elastic element 1002 is stretched until the first splint 1001 and the second splint 1003 complete the clamping of the cable connector, and then the test is started.

[0053] As the retraction belt 1004 gradually retracts (the first splint 1001 moves to the left), the distance between the first splint 1001 and the second splint 1003 gradually decreases until the copper plates on both are in contact with the cable connector. Then the limit assembly continues to reel in the traction rope 1005. Since the hardness of the copper plates is relatively small, under the action of the extrusion force, the copper plates on the first splint 1001 and the second splint 1003 will partially enter the area of the through hole on the cable connector, thereby increasing the contact area between the first splint 1001, the second splint 1003 and the cable connector, thereby improving the cable The stability of clamping can avoid disconnection or unstable connection in the subsequent test process due to vibration caused by simulating the real environment, which may cause interruption of the test process and affect the normal progress of the test. The test is carried out after the cable connector is completely clamped (at this time, the limit component stops rewinding the traction rope 1005). After the test is completed, the traction rope 1005 is released through the limit component, and the first splint 1001 is gradually reset under the action of the tension of the second elastic element 1002. At the same time, the retraction belt 1004 drives the traction rope 1005 to reset together under the action of its own elastic force and the pull of the first splint 1001.

[0054] like Figure 7-Figure 9As shown, the limiting assembly includes: a winding member 1101, which is rotatably connected to the handle 7, and the winding member 1101 is used to wind up the traction rope 1005. A limiting hole is provided at an eccentric position on the winding member 1101 to facilitate the winding member 1101 to wind up the traction rope 1005, and a third elastic element 1102 is fixedly connected between the winding member 1101 and the handle 7; a sliding rod 1103, which is splined to the winding member 1101, and a fourth elastic element 1104 is fixedly connected between the sliding rod 1103 and the winding member 1101; a ratchet 1105, which is fixedly connected to the sliding rod 1103, and a pawl 1106 is rotatably connected to the handle 7, and the pawl 1106 is used to limit the ratchet 1105, and a fifth elastic element 1107 is fixedly connected between the pawl 1106 and the handle 7.

[0055] In the above scheme, an annular array of limiting holes is provided at the eccentric position of the winding member 1101. The staff can use the pry bar to make the winding member 1101 and the handle 7 rotate relative to each other to reduce the operating force. The third elastic element 1102 is a torsion spring for resetting the winding member 1101. The fourth elastic element 1104 is a spring for resetting the sliding rod 1103. The fifth elastic element 1107 is a torsion spring for resetting the pawl 1106. When it is necessary to rewind the traction rope 1005 so that the first clamping plate 1001 and the second clamping plate 1003 clamp the cable connector, the staff rotates the winding member 1101 clockwise (such as Figure 9 (Taking the left view direction as an example), the winding member 1101 starts to wind up the traction rope 1005, the winding member 1101 and the handle 7 rotate relative to each other, the third elastic element 1102 is deformed, and the winding member 1101 drives the ratchet 1105 to rotate clockwise through the sliding rod 1103. The ratchet 1105 repeatedly passes through the pawl 1106 during the clockwise rotation until the cable connector is clamped. The winding member 1101 stops rotating clockwise, and the pawl 1106 limits the ratchet 1105 to prevent the ratchet 1105 from reversing. After the test work is completed, the staff pushes the sliding rod 1103, and the sliding rod 1103 slides to the right along the winding member 1101. The fourth elastic element 1104 is compressed, and the sliding rod 1103 drives the ratchet 1105 to move to the right together, and the ratchet 1105 gradually loses contact with the pawl 1106, and then the winding member 1101 gradually resets under the action of the torsion of the third elastic element 1102, and releases the traction rope 1005 until the winding member 1101 is completely reset, and then the staff releases the sliding rod 1103, and the sliding rod 1103 moves to the left under the action of the elastic force of the fourth elastic element 1104, and the sliding rod 1103 drives the ratchet 1105 to move to the left together until the sliding rod 1103 is completely reset, and the pawl 1106 limits the ratchet 1105 again.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A preventive test device for electrical equipment, Its characteristics include: A frame (1), wherein the frame (1) is equipped with a motor (2), and the output shaft of the motor (2) is fixedly connected to a rotating member (3); A sliding member (4) slidably connected to the frame (1); A bracket (5) is rotatably connected to the sliding member (4); the rotating member (3) and the bracket (5) are rotatably connected to a detection rod (6); the detection rod (6) is electrically connected to a testing instrument (101) via a connecting line (102); A handle (7) fixedly connected to the detection rod (6); A fixing mechanism is provided on the sliding member (4) and is used to change the relative resistance between the sliding member (4) and the frame (1), thereby changing the relative motion relationship between the two; A limiting mechanism is provided on a side of the frame (1) close to the motor (2) and is used to change the motion trajectory of the detection rod (6); A clamping mechanism is provided on the detection rod (6) and is used for clamping the connector of the electrical equipment to be tested.

2. A preventive test device for electrical equipment according to claim 1, characterized in that: The fixing mechanism includes: A damping member (801) is slidably connected to the bracket (5); the bracket (5) is provided with a first cavity (802); the damping member (801) slides in the first cavity (802); a first elastic element (803) is fixedly connected between the damping member (801) and the bracket (5); the bracket (5) is provided with a second cavity (804); the second cavity (804) is communicated with the first cavity (802); a third cavity (805) is commonly provided between the detection rod (6) and the handle (7); the third cavity (805) is communicated with the second cavity (804); The liquid capsule (806) is fixedly connected to the handle (7), and the liquid capsule (806) is communicated with the third cavity (805).

3. A preventive test device for electrical equipment according to claim 2, characterized in that: A rubber pad is provided at one end of the damping member (801) away from the first elastic element (803), and a friction surface is provided on the frame (1) for contacting the rubber pad on the damping member (801).

4. A preventive test device for electrical equipment according to claim 1, characterized in that: The limiting mechanism includes: A limiting frame (901) is fixedly connected to a side of the frame body (1) close to the motor (2), and the limiting frame (901) is provided with a limiting slot (902). The rotating member (3) is a telescopic rod, the telescopic end of which is rotatably connected to the detection rod (6), and a protrusion is fixedly connected to the telescopic end. The limiting slot (902) is used to limit the protrusion, and the limiting slot (902) is composed of a first slot (9021), a second slot (9022) and a third slot (9023) arranged in a mirror image.

5. A preventive test device for electrical equipment according to claim 4, characterized in that: The first groove (9021) and the third groove (9023) are both arc-shaped grooves, the second groove (9022) is an inclined groove, and the first groove (9021), the second groove (9022) and the third groove (9023) are all used to limit the protrusion at the telescopic end of the rotating member (3).

6. A preventive test device for electrical equipment according to claim 1, characterized in that: The clamping mechanism includes: A first clamping plate (1001) is slidably connected to the detection rod (6), and a second elastic element (1002) is fixedly connected between the first clamping plate (1001) and the detection rod (6); The second clamping plate (1003) is fixedly connected to the detection rod (6); the first clamping plate (1001) is fixedly connected to a gathering belt (1004); the gathering belt (1004) is slidably connected to the second clamping plate (1003); the detection rod (6) is slidably connected to a traction rope (1005); the two ends of the gathering belt (1004) are fixedly connected to the traction rope (1005) and the first clamping plate (1001) respectively; A limiting assembly is provided on the handle (7) and is used to reel in and release the traction rope (1005), thereby changing the clamping state of the connector of the electrical device to be tested.

7. A preventive test device for electrical equipment according to claim 6, characterized in that: The gathering belt (1004) is made of an elastic metal conductive material and is arc-shaped, and is used to wrap the connector of the electrical device to be tested.

8. A preventive test device for electrical equipment according to claim 6, characterized in that: Opposite sides of the first clamping plate (1001) and the second clamping plate (1003) are both fixedly connected with copper plates for adapting to the characteristics of the connector of the electrical device to be tested.

9. A preventive test device for electrical equipment according to claim 6, characterized in that: The limiting component includes: a winding member (1101) rotatably connected to the handle (7), the winding member (1101) being used to wind up the traction rope (1005), and a third elastic element (1102) being fixedly connected between the winding member (1101) and the handle (7); A sliding rod (1103) is spline-connected to the winding member (1101), and a fourth elastic element (1104) is fixedly connected between the sliding rod (1103) and the winding member (1101); The ratchet (1105) is fixedly connected to the sliding rod (1103), and the handle (7) is rotatably connected to a pawl (1106). The pawl (1106) is used to limit the ratchet (1105), and a fifth elastic element (1107) is fixedly connected between the pawl (1106) and the handle (7).

10. A preventive test device for electrical equipment according to claim 9, characterized in that: A limiting hole is provided at an eccentric position on the reeling member (1101), so as to facilitate the reeling member (1101) to reel in the traction rope (1005).

Images