Withstand voltage test bench for power-taking transformer

Abstract

The utility model belongs to the technical field of transformer detection, and particularly relates to a withstand voltage test board for a power-taking transformer. Comprising a test board body, a pressing plate connected to the upper part of the test board body through a pressing cylinder, a probe arranged at the bottom of the pressing plate, a test board arranged at the lower part of the test board body, and a plurality of positioning grooves uniformly formed in the top of the test board, the automatic feeding assembly comprises a plurality of positioning blocks evenly arranged on the front side of the testing plate, two clamping plates arranged on the two sides of the positioning blocks and connected through first electric telescopic rods, a transmission lead screw arranged between the two fixing plates, a motor arranged in one fixing plate and a sliding block in transmission threaded connection to the outer wall of the transmission lead screw. According to the utility model, the semi-automatic operation of the withstand voltage test of the transformer is realized, the efficiency of the transformer test can be improved, the risk of electric shock of testers can be avoided, and the detected transformer can be transferred from the test board to the collection table after the test of the transformer is finished.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer detection, and in particular relates to a withstand voltage test bench for a power transformer. Background Art

[0002] The power transformer is a special transformer that is usually used to convert the high voltage in the power grid into a low voltage suitable for users. Due to the different working environments and working conditions of the transformer, the required insulation strength will also be different. Therefore, in order to ensure that the transformer can operate normally under normal working conditions and ensure the safety of personnel and equipment, it is necessary to perform a withstand voltage test on the power transformer.

[0003] The Chinese patent with the authorization announcement number CN 219831288 U discloses a transformer withstand voltage test device, including a frame base, and a side plate fixed on the upper side of the frame base, a movable plate that moves up and down is provided on one side of the side plate, a slot is provided on the upper side of the frame base, a pressure measurement component is fixed at the slot position, the pressure measurement component is provided with a test plate for positioning the product to be tested, a detection needle is provided on the lower side of the test plate, and the frame base is provided with a quick-plug connector, and the detection needle is connected to the quick-plug connector through a connecting line. The utility model can position the transformer. During the transformer testing process, it can ensure that the transformer to be tested can move in a straight line, thereby ensuring that the transformer pin and the detection needle are not easily deformed during the contact process, thereby ensuring the accuracy of the test. However, in the transformer testing process of the above patent, the tester needs to place the transformers to be tested one by one into the positioning groove of the test plate, and then take out the transformers one by one after the transformer test is completed. This testing method is not only inefficient, but also may cause the risk of electric shock to the tester during the manual placement of the transformer. Utility Model Content

[0004] In view of the above problems, the purpose of the present utility model is to provide a power transformer withstand voltage test bench to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the utility model adopts the following technical solution: a power transformer withstand voltage test bench, comprising a test bench body, a pressure plate connected to the upper part of the test bench body through a downward pressure cylinder, a detection needle installed at the bottom of the pressure plate, a test board arranged at the lower part of the test bench body and used to place the transformer, and a plurality of positioning grooves evenly opened on the top of the test board, an automatic loading assembly is arranged at the lower part of the test bench body and located on the outer side of the test board, the automatic loading assembly comprises a plurality of positioning blocks evenly arranged on the front side of the test board, two clamping plates arranged on both sides of the positioning blocks and connected by a first electric telescopic rod, two fixed plates arranged on one side of the test bench body, a transmission screw arranged between the two fixed plates, a motor arranged inside one of the fixed plates and used to drive the transmission screw to rotate, and a slider whose transmission is screwed to the outer wall of the transmission screw and whose top end is connected to one of the clamping plates through a second electric telescopic rod.

[0006] The beneficial effects of the utility model are as follows: by arranging an automatic loading component, there is no need for the tester to directly place the transformer on the test board and remove the transformer from the test board one by one, so as to realize the semi-automatic operation of the transformer withstand voltage test, which can not only improve the efficiency of the transformer test, but also avoid the risk of electric shock for the tester. At the same time, after the transformer test is completed, the tested transformer can be transferred from the test board to the assembly table.

[0007] In order to facilitate the transfer of the transformer between two adjacent positioning blocks into the positioning groove:

[0008] As a further improvement of the above technical solution: the spacing between two adjacent positioning blocks is the same as the spacing between the positioning grooves, and they correspond one to one.

[0009] The beneficial effect of this improvement is that by providing mutually corresponding positioning blocks and positioning grooves, it is possible to facilitate the transfer of the transformer between two adjacent positioning blocks to the positioning groove.

[0010] To make it easier to drop the transformer into the positioning slot on the test board:

[0011] As a further improvement of the above technical solution: a plurality of clamping blocks are arranged on one side of the two clamping plates close to the positioning blocks, and each of the clamping blocks is located in the middle of two adjacent positioning blocks and at the same time is located on the center line of the positioning groove.

[0012] The beneficial effect of this improvement is as follows: by arranging clamping blocks on the inner sides of the two clamping plates, when one of the clamping plates moves toward the side close to the transformer under the action of the first electric telescopic rod, the two clamping plates just fit with the two sides of the positioning block, so that the clamping block clamps the transformer, and when the transformer is transferred to the test board, the two clamping plates are just located on both sides of the test board, and when the second electric telescopic rod drives the clamping plates and the transformer to descend, the transformer just falls into the positioning groove.

[0013] In order to enable the clamping plate and transformer to move stably to one side of the test board:

[0014] As a further improvement of the above technical solution: two limit blocks are arranged on the top of the test bench body and on one side symmetrical to the fixed plate, a limit rod is arranged between the two limit blocks, and the outer wall of the limit rod is slidably connected with a movable block connected to the clamping plate.

[0015] The beneficial effect of this improvement is that when the transmission screw drives the slider and the clamping plate to move, it drives the movable block to slide along the limiting rod, which can limit the clamping plate, so that the clamping plate and the transformer can stably move to one side of the test board.

[0016] To facilitate the transfer of the tested transformer from the test board to the assembly table:

[0017] As a further improvement of the above technical solution: a conveyor belt is installed on the top of the test bench body and at the rear side of the test plate, and a collection platform for collecting tested transformers is connected to the side wall of the test bench body and at the tail end of the conveyor belt.

[0018] The beneficial effect of this improvement is: after the transformer test is completed, the conveying screw is started again to drive the slider and the clamping plate to continue to move toward the rear side of the test plate. When the transformer is located above the conveyor belt, under the action of the first electric telescopic rod, a clamping plate is driven to leave the transformer, so that the transformer falls onto the conveyor belt and is transported to the assembly table along the conveyor belt.

[0019] In order to make the probe fall accurately on the transformer:

[0020] As a further improvement of the above technical solution: the positioning groove corresponds to the size of the transformer.

[0021] The beneficial effect of this improvement is that when the detection needle moves downward under the action of the downward pressure cylinder to contact the transformer and perform a test, the detection needle can accurately fall on the transformer.

[0022] In order to realize the automation of transformer withstand voltage test:

[0023] As a further improvement of the above technical solution: a control panel electrically connected to the downward pressure cylinder, the first electric telescopic rod, the second electric telescopic rod and the motor is arranged on the front side of the test bench body.

[0024] The beneficial effect of this improvement is that the start and stop of the downward pressure cylinder, the first electric telescopic rod, the second electric telescopic rod and the motor can be controlled through the control console, thereby eliminating the need for testers to directly place the transformer on the test board and remove the transformer from the test board one by one, thereby realizing the automated operation of the transformer withstand voltage test. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a side view stereoscopic structural schematic diagram of the utility model;

[0026] Figure 2 This is a front view structural schematic diagram of the utility model;

[0027] Figure 3 It is a schematic diagram of the top cross-sectional structure of the utility model;

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure of the left side view of the utility model.

[0029] In the figure: 1. test bench body; 2. downward pressure cylinder; 3. pressure plate; 4. detection needle; 5. test plate; 6. positioning groove; 7. positioning block; 8. first electric telescopic rod; 9. clamping plate; 10. fixing plate; 11. transmission screw; 12. motor; 13. second electric telescopic rod; 14. slider; 15. clamping block; 16. limit block; 17. limit rod; 18. movable block; 19. conveyor belt; 20. assembly table; 21. control panel. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0031] like Figure 1-4As shown, a voltage withstand test bench for power transformers includes a test bench body 1, a pressure plate 3 connected to the upper part of the test bench body 1 through a downward pressure cylinder 2, a detection needle 4 installed at the bottom of the pressure plate 3, a test board 5 arranged at the lower part of the test bench body 1 and used to place the transformer, and a plurality of positioning grooves 6 evenly opened on the top of the test board 5, an automatic feeding assembly is arranged at the lower part of the test bench body 1 and on the outer side of the test board 5, and the automatic feeding assembly includes a plurality of positioning blocks 7 evenly arranged on the front side of the test board 5, two clamping plates 9 arranged on both sides of the positioning blocks 7 and connected by a first electric telescopic rod 8, two fixing plates 10 arranged on one side of the test bench body 1, a transmission screw 11 arranged between the two fixing plates 10, and a fixing plate 11 arranged on one of the fixing plates 10. 0 and used to drive the transmission screw 11 to rotate, and the sliding block 14 that is screwed to the outer wall of the transmission screw 11 and whose top end is connected to one of the clamping plates 9 through the second electric telescopic rod 13. By setting the automatic feeding assembly, there is no need for the tester to directly place the transformer on the test board 5 and remove the transformer from the test board 5 one by one, so as to realize the semi-automatic operation of the transformer withstand voltage test, which can not only improve the efficiency of the transformer test, but also avoid the risk of electric shock to the tester. At the same time, after the transformer test is completed, the tested transformer can be transferred from the test board 5 to the collection table 20. The spacing between two adjacent positioning blocks 7 is the same as the spacing between the positioning grooves 6, and they correspond one to one. By setting the positioning blocks 7 corresponding to each other And positioning groove 6, can facilitate the transformer between two adjacent positioning blocks 7 to be transferred to positioning groove 6, two clamping plates 9 are provided with a plurality of clamping blocks 15 on one side close to positioning block 7, each of said clamping blocks 15 is respectively located in the middle of two adjacent positioning blocks 7, and is located on the center line of positioning groove 6 at the same time, by providing clamping blocks 15 on the inner side of two clamping plates 9, when one of the clamping plates 9 moves to the side close to the transformer under the action of first electric telescopic rod 8, two clamping plates 9 just fit with both sides of positioning block 7, so that clamping blocks 15 clamp the transformer, when the transformer is transferred to the test board 5, two clamping plates 9 just fit on both sides of test board 5, when second electric telescopic rod 13 drives clamping plates 9 and transformer to descend, transformer just The test bench body 1 is provided with two limit blocks 16 at the top and on one side symmetrical to the fixed plate 10, and a limit rod 17 is provided between the two limit blocks 16. The outer wall of the limit rod 17 is slidably connected with a movable block 18 connected with the clamping plate 9. When the transmission screw 11 drives the slider 14 and the clamping plate 9 to move, the movable block 18 is driven to slide along the limit rod 17, which can limit the clamping plate 9, so that the clamping plate 9 and the transformer can stably move to one side of the test board 5. A conveyor belt 19 is installed at the top of the test bench body and on the rear side of the test board 5. A collection table 20 for collecting the tested transformers is connected to the side wall of the test bench body and at the tail end of the conveyor belt 19. After the transformer test is completed,By starting the conveying screw again, it drives the slider 14 and the clamping plate 9 to continue to move to the rear side of the test board 5. When the transformer is located above the conveyor belt, under the action of the first electric telescopic rod 8, a clamping plate 9 is driven to leave the transformer, so that the transformer falls on the conveyor belt and is transported to the collection table 20 along the conveyor belt. The positioning groove 6 corresponds to the size of the transformer. When the detection needle 4 moves downward under the action of the pressing cylinder 2 to contact and test the transformer, the detection needle 4 can accurately fall on the transformer. The front side of the test bench body is provided with a control panel 21 electrically connected to the pressing cylinder 2, the first electric telescopic rod 8, the second electric telescopic rod 13 and the motor 12. The control panel 21 can control the start and stop of the pressing cylinder 2, the first electric telescopic rod 8, the second electric telescopic rod 13 and the motor 12, so that the test personnel do not need to directly place the transformer on the test board 5 or remove the transformer from the test board 5 one by one, so as to realize the automatic operation of the transformer withstand voltage test.

[0032] The working principle and use process of the utility model are as follows: when using the device, the transformers to be tested are first placed one by one between two adjacent positioning blocks 7, and the first electric telescopic rod 8 is controlled to retract by the switch on the operating table, and the clamping plate 9 close to the side of the test board 5 is driven to move toward the side close to the transformer. The two clamping plates 9 are just in contact with the two sides of the positioning block 7, so that the clamping block 15 clamps the transformer. At the same time, the second electric telescopic rod 13 is controlled to move upward, and the two clamping plates 9 and the transformer clamped by the clamping plates 9 are driven to move upward until the bottom end thereof exceeds the top wall of the test board 5. At the same time, under the action of the motor 12, the transmission screw 11 is driven to rotate, and the slider 14, the clamping plate 9 and the transformer are driven to move directly toward the test board 5. When the transformer moves to the position above the positioning groove 6 , under the action of the second electric telescopic rod 13, the clamping plate 9 and the transformer are driven to move downward, so that the two clamping plates 9 are located on both sides of the test plate 5, and the transformer falls into the positioning groove 6. Then the downward pressure cylinder 2 is started to drive the pressure plate 3 and the detection needle 4 to move downward, so that the detection needle 4 contacts the pin of the transformer and performs a withstand voltage test on it. After the transformer test is completed, under the action of the second electric telescopic rod 13, the clamping plate 9 and the transformer are driven to move upward, and by starting the transmission screw again, it drives the slider 14 and the clamping plate 9 to continue to move to the rear side of the test plate 5. When the transformer is located above the conveyor belt, under the action of the first electric telescopic rod 8, a clamping plate 9 is driven to leave the transformer, so that the transformer falls on the conveyor belt and is conveyed to the collection table 20 along the conveyor belt.

[0033] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0034] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A voltage withstand test bench for a power transformer, comprising a test bench body (1), a pressure plate (3) connected to the upper part of the test bench body (1) through a downward pressure cylinder (2), a detection needle (4) arranged at the bottom of the pressure plate (3), a test board (5) arranged at the lower part of the test bench body (1) and used to place the transformer, and a plurality of positioning grooves (6) evenly arranged on the top of the test board (5), characterized in that: An automatic loading assembly is arranged at the lower part of the test bench body (1) and on the outer side of the test plate (5), and the automatic loading assembly comprises a plurality of positioning blocks (7) evenly arranged on the front side of the test plate (5), two clamping plates (9) arranged on both sides of the positioning blocks (7) and connected via a first electric telescopic rod (8), two fixing plates (10) arranged on one side of the test bench body (1), a transmission screw (11) arranged between the two fixing plates (10), a motor (12) arranged inside one of the fixing plates (10) and used for driving the transmission screw (11) to rotate, and a sliding block (14) which is screwed to the outer wall of the transmission screw (11) and whose top end is connected to one of the clamping plates (9) via a second electric telescopic rod (13).

2. The power transformer withstand voltage test bench according to claim 1, characterized in that: The spacing between two adjacent positioning blocks (7) is the same as the spacing between the positioning grooves (6), and they correspond one to one.

3. The power transformer withstand voltage test bench according to claim 1, characterized in that: A plurality of clamping blocks (15) are provided on one side of the two clamping plates (9) close to the positioning blocks (7), and each of the clamping blocks (15) is located in the middle of two adjacent positioning blocks (7) and is also located on the center line of the positioning groove (6).

4. The power transformer withstand voltage test bench according to claim 1, characterized in that: Two limit blocks (16) are arranged at the top of the test bench body (1) and on a side symmetrical to the fixed plate (10), a limit rod (17) is arranged between the two limit blocks (16), and an outer wall of the limit rod (17) is slidably connected to a movable block (18) connected to the clamping plate (9).

5. The power transformer withstand voltage test bench according to claim 1, characterized in that: A conveyor belt (19) is installed on the top of the test bench body and located at the rear side of the test board (5), and a collection platform (20) for collecting tested transformers is connected to the side wall of the test bench body and located at the tail end of the conveyor belt (19).

6. The power transformer withstand voltage test bench according to claim 1, characterized in that: The positioning groove (6) corresponds to the size of the transformer.

7. The power transformer withstand voltage test bench according to claim 1, characterized in that: A control console (21) electrically connected to the downward-pressing cylinder (2), the first electric telescopic rod (8), the second electric telescopic rod (13) and the motor (12) is arranged on the front side of the test bench body.

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