Portable combined mutual inductor pressure measurement box

Abstract

The application relates to the technical field of pressure-resistant measuring equipment, and discloses a portable combined mutual inductor pressure-resistant measuring box, which comprises a pressure-resistant measuring box, the rear side of the pressure-resistant measuring box is provided with a sealing box cover, the pressure-resistant measuring box and the sealing box cover are rotationally connected through a hinge, and a control panel is fixedly installed in the pressure-resistant measuring box. Through cooperation between the bottom protruding edge of the sealing box cover and the inclined wedge, when the sealing box cover is closed, the inclined wedge is pushed into the installation groove, air bags are extruded, finally, the sealing air cushion is expanded, the sealing air cushion and the sealing box cover are attached, compared with a traditional device, when the pressure-resistant measuring box and the sealing box cover are closed, external moisture is difficult to enter the pressure-resistant measuring box, the sealing property is ensured, the moisture is prevented from entering the pressure-resistant measuring box, and the service life of the device is prolonged.

Description

Technical Field

[0001] This application relates to the field of withstand voltage measurement equipment technology, and more specifically, to a portable modular transformer withstand voltage measurement box. Background Technology

[0002] The combined instrument transformer withstand voltage test box is a testing device specifically designed for withstand voltage tests on combined voltage transformers (PTs) and current transformers (CTs). It typically consists of modules such as a high-voltage power supply, measuring instruments, protection circuits, and a control system. For ease of portability, these modules are usually integrated into the box. Its compact design and simple operation can meet the testing needs of different types of instrument transformers, making it an important tool for preventive testing of power equipment.

[0003] Currently, for example, Chinese Patent Publication (Announcement) No.: CN219715645U "A Portable Combined Current Transformer Withstand Voltage Measurement Box", this device uses a U-shaped placement plate and a box body that are slidably connected. When carrying the withstand voltage measurement box, after the withstand voltage measurement equipment is restored to its initial position, the U-shaped placement plate can be moved into the box body, thereby reducing the distance between the probe and the testing platform, and thus reducing the space of the measurement box, making it easier for staff to carry and bringing convenience to the staff.

[0004] However, in actual use, because this withstand voltage measurement box is small and easy to carry, it is often necessary to move it to an outdoor environment when transporting it. However, sudden rain or snow can cause humid air or water droplets to seep into the interior through the tiny gaps between the box and the lid. If the high-voltage module inside the box is exposed to a humid environment for a long time, it may cause failures such as decreased insulation performance, short circuits of components, or even arc discharge, which seriously affect the safety and testing accuracy of the equipment. Therefore, it is necessary to improve and optimize it. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this application provides a portable modular transformer withstand voltage measurement box with the advantages of good sealing and waterproof performance.

[0006] To achieve the above objectives, this application provides the following technical solution: a portable combined current transformer withstand voltage measurement box, including a withstand voltage measurement box, a sealed box cover is provided on the rear side of the withstand voltage measurement box, the withstand voltage measurement box and the sealed box cover are rotatably connected by a hinge, and a control panel is fixedly installed inside the withstand voltage measurement box;

[0007] The control panel has a pressure groove on its edge, and the pressure measuring box has an installation groove inside. A wedge is movably installed inside the installation groove, with one end of the wedge penetrating into the pressure groove. An airbag is installed inside the installation groove, and the airbag and the wedge abut against each other. A sealing gasket is fixedly installed on the top of the airbag, and the sealing gasket and the airbag are interconnected. A raised edge is fixedly installed on the bottom of the sealing box cover, and the raised edge corresponds to the pressure groove.

[0008] As a preferred technical solution of this application, the bottom of the sealing box cover is provided with a sealing groove, the sealing groove and the raised edge are positioned correspondingly, and the sealing air cushion can fill the interior of the sealing groove after the sealing box cover is closed.

[0009] As a preferred technical solution of this application, the inclined surface of the wedge is opened in the upward direction, and the convex edge can cause the wedge to be displaced by pressing the inclined surface of the wedge.

[0010] As a preferred technical solution of this application, a locking hook is fixedly installed on the front side of the sealing box cover, and a buckle is provided on the front side of the pressure measuring box. The buckle and the locking hook cooperate with each other to fix the sealing box cover.

[0011] As a preferred technical solution of this application, movable grooves are provided on both the left and right sides inside the sealed box cover. An installation plate is movably installed inside the movable groove. One end of the two sets of installation plates extends to the outside of the movable groove, and a drying and water-absorbing plate is provided between the installation plate and the sealed box cover.

[0012] As a preferred technical solution of this application, bolts are provided inside the two sets of movable slots. One end of the bolt is rotatably connected to the mounting plate, and the other end of the bolt is threadedly connected to the outer wall of the sealing box cover. The bolt passes through to the outside of the sealing box cover and is fixedly connected to the knob.

[0013] As a preferred technical solution of this application, the dry absorbent plate is composed of silica gel, and the surface of the dry absorbent plate is provided with small holes to increase the contact area between the dry absorbent plate and the air.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] 1. This application utilizes the cooperation between the bottom protrusion of the sealing box cover and the wedge to ensure that when the sealing box cover is closed, the wedge is pushed into the mounting groove and compresses the airbag. Ultimately, the sealing air pad expands, making the sealing air pad and the inner wall of the sealing groove fit tightly together. Compared with traditional devices, this device can prevent external moisture from entering the interior of the pressure measuring box when the pressure measuring box and the sealing box cover are closed, thus ensuring the sealing performance and preventing moisture from entering the pressure measuring box, thereby improving the service life of the device.

[0016] 2. By setting up a drying and water-absorbing plate, this application enables the device to not only ensure its waterproof effect through sealing, but also to remove the moisture already present inside the pressure measuring box through the drying and water-absorbing plate, further improving its service life. At the same time, the device can be retracted into the movable slot by rotating the knob, which makes it convenient for the staff to replace the drying and water-absorbing plate and avoid the failure of the drying and water-absorbing plate after long-term use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this application;

[0019] Figure 2 This is a schematic diagram of the sealed box cover when closed according to this application;

[0020] Figure 3 This is a schematic diagram of the sealing box cover structure of this application;

[0021] Figure 4 This is a schematic diagram of the airbag structure in this application;

[0022] Figure 5 This is a schematic diagram of the groove structure in this application;

[0023] Figure 6 This is a schematic diagram of the mounting plate structure for this application.

[0024] In the diagram: 1. Pressure measuring box; 11. Buckle; 12. Control panel; 13. Pressure groove; 14. Mounting groove; 15. Wedge; 16. Airbag; 17. Sealing air cushion; 2. Sealing box cover; 21. Movable groove; 22. Knob; 23. Bolt; 24. Mounting plate; 25. Drying and water absorption plate; 26. Sealing groove; 27. Raised edge; 28. Locking hook; 3. Hinge. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0026] like Figures 1 to 6 As shown, the portable combined current transformer withstand voltage measurement box provided in this application includes a withstand voltage measurement box 1, a sealed box cover 2 is provided on the rear side of the withstand voltage measurement box 1, the withstand voltage measurement box 1 and the sealed box cover 2 are rotatably connected by a hinge 3, and a control panel 12 is fixedly installed inside the withstand voltage measurement box 1.

[0027] The control panel 12 has a pressure groove 13 on its edge. The pressure measuring box 1 has an installation groove 14 inside. A wedge 15 is movably installed inside the installation groove 14. One end of the wedge 15 extends into the interior of the pressure groove 13. An airbag 16 is installed inside the installation groove 14. The airbag 16 and the wedge 15 abut against each other. A sealing gasket 17 is fixedly installed on the top of the airbag 16. The sealing gasket 17 and the airbag 16 are interconnected. A raised edge 27 is fixedly installed on the bottom of the sealing box cover 2. The raised edge 27 corresponds to the pressure groove 13.

[0028] Before testing, the operator must correctly connect the current transformer under test, connecting the primary winding to the high-voltage output terminal and short-circuiting the secondary winding to ground to simulate real operating conditions. Simultaneously, the entire system must be reliably grounded to ensure operational safety. During the test, the built-in control system of the withstand voltage measuring box 1 will automatically increase the voltage according to a preset program. The operator can clearly observe the voltage steadily rising to the specified value and remaining stable. During this period, the equipment continuously monitors the leakage current magnitude and waveform changes, which can be monitored and adjusted in real time via the control panel 12. After use, the sealing box cover 2 can be closed. When the sealing box cover 2 is closed, the bottom of the sealing box cover 2... The protruding edge 27 of the part will enter the interior of the pressure groove 13. After the protruding edge 27 enters the pressure groove 13, it will first abut against the wedge 15. Due to the shape characteristics of the wedge 15, the protruding edge 27 will push the wedge 15 into the mounting groove 14 when it moves downward. As the wedge 15 moves, the wedge 15 will squeeze the airbag 16, so that the gas inside the airbag 16 enters the sealing gas pad 17. At this time, when the sealing box cover 2 is completely closed, the airbag 16 is squeezed to the minimum, and the sealing gas pad 17 will expand until the sealing gas pad 17 and the sealing box cover 2 abut against each other, completing the seal between the pressure measuring box 1 and the sealing box cover 2.

[0029] By engaging the bottom protrusion 27 of the sealing cover 2 with the wedge 15, the wedge 15 is pushed into the mounting groove 14 when the sealing cover 2 is closed, compressing the airbag 16. Finally, the sealing air pad 17 expands, making the sealing air pad 17 and the sealing cover 2 fit tightly together. Compared with traditional devices, this device can prevent external moisture from entering the interior of the pressure measuring box 1 when the pressure measuring box 1 and the sealing cover 2 are closed by filling the sealing air pad 17, thus ensuring the airtightness and preventing moisture from entering the interior of the pressure measuring box 1, and improving the service life of the device.

[0030] The sealing box cover 2 has a sealing groove 26 at its bottom, which corresponds to the position of the raised edge 27. When the sealing box cover 2 is closed, the sealing air cushion 17 can fill the interior of the sealing groove 26. When the sealing box cover 2 is fully closed, the airbag 16 is compressed to its minimum. Since the sealing air cushion 7 and the sealing groove 26 are aligned with each other, the sealing air cushion 17 will expand inside the sealing groove 26 until the sealing air cushion 17 and the inner wall of the sealing groove 26 abut against each other.

[0031] The flexible material properties of the sealing air cushion 17 ensure that it fits tightly against the inner wall of the sealing groove 26, preventing moisture from entering the pressure measuring chamber 1.

[0032] The inclined surface of the wedge 15 is opened in the upward direction, and the protruding edge 27 can displace the wedge 15 by pressing the inclined surface of the wedge 15.

[0033] Due to the shape characteristics of the wedge 15, the displacement of the wedge 15 will compress the airbag 16, further causing the sealing air cushion 17 to expand.

[0034] The sealing box cover 2 is fixedly installed with a locking hook 28 on the front side, and the pressure measuring box 1 is provided with a buckle 11 on the front side. The buckle 11 and the locking hook 28 cooperate with each other to fix the sealing box cover 2.

[0035] After the pressure measuring box 1 and the sealing box cover 2 are closed, the staff can use the buckle 11 and the locking hook 28 to fix the sealing box cover 2. It should be noted that the buckle 11 and the locking hook 28 are very common existing technologies, and will not be described in detail here.

[0036] The sealing box cover 2 has movable grooves 21 on both the left and right sides inside. The movable grooves 21 are movably installed with mounting plates 24 inside. One end of the two sets of mounting plates 24 extends to the outside of the movable grooves 21, and a drying and water-absorbing plate 25 is provided between the mounting plates 24 and the sealing box cover 2.

[0037] Among them, the two sets of movable slots 21 are equipped with bolts 23. One end of the bolt 23 is rotatably connected to the mounting plate 24, and the other end of the bolt 23 is threadedly connected to the outer wall of the sealing box cover 2. The bolt 23 passes through to the outside of the sealing box cover 2 and is fixedly connected to the knob 22.

[0038] The operator can rotate the knob 22 to rotate the bolt 23. The rotation of the bolt 23 will cause the bolt 23 to move outward. The mounting plate 24 will then move together with the bolt 23 inside the movable groove 21. Finally, the mounting plate 24 will be stored in the inner wall of the movable groove 21, so that the drying absorbent plate 25 can be removed. The operator can replace the drying absorbent plate 25 through this step.

[0039] By using the drying absorbent plate 25, the device can not only ensure its waterproof effect through sealing, but also remove the moisture already present inside the pressure measuring box 1, further improving its service life. At the same time, the device can retract the mounting plate 24 into the movable slot 21 by rotating the knob 22, making it convenient for staff to replace the drying absorbent plate 25 and avoid its failure after long-term use.

[0040] The dryer absorbent plate 25 is composed of silica gel, and the surface of the dryer absorbent plate 25 is provided with tiny pores to increase the contact area between the dryer absorbent plate 25 and the air.

[0041] The main component of the drying absorbent plate 25 is silica gel. Due to the material properties of the drying absorbent plate 25, when the pressure measuring box 1 and the sealing box cover 2 are closed, the drying absorbent plate 25 will absorb the moisture in the air, thus avoiding damage to the internal components of the pressure measuring box 1.

[0042] The working principle and usage process of this application:

[0043] Before the test begins, the operator must correctly connect the current transformer to be tested, connect the primary winding to the high voltage output terminal, and short-circuit the secondary winding to ground to simulate the real working conditions. At the same time, the entire system must be reliably grounded to ensure operational safety. During the test, the control system built into the withstand voltage measuring box 1 will automatically increase the voltage according to the preset program. The operator can clearly observe the voltage rising steadily to the specified value and remaining stable. During this period, the equipment continuously monitors the leakage current magnitude and waveform changes, and can monitor and adjust them in real time through the control panel 12. After the staff has finished using the equipment, the sealing box cover 2 can be closed. When the sealing box cover 2 is closed, the protruding edge 27 at the bottom of the sealing box cover 2 will enter the interior of the pressure groove 13. After the protruding edge 27 enters the pressure groove 13, it will first abut against the wedge 15. Due to the shape characteristics of the wedge 15, the protruding edge 27 will push the wedge 15 into the mounting groove 14 when it moves downward. As the wedge 15 moves, the wedge 15 will squeeze the air bag 16, allowing the gas inside the air bag 16 to enter the sealing gas pad 17. At this time, when the sealing box cover 2 is completely closed, the air bag 16 is squeezed to its minimum. Since the sealing gas pad 17 and the sealing groove 26 are aligned with each other, the sealing gas pad 17 will expand inside the sealing groove 26 until the sealing gas pad 17 and the inner wall of the sealing groove 26 abut against each other, thus completing the seal between the pressure measuring box 1 and the sealing box cover 2.

[0044] When the drying absorbent plate 25 needs to be replaced, the operator can turn the knob 22 to rotate the bolt 23. The rotation of the bolt 23 will cause the bolt 23 to move outward. Further, the mounting plate 24 will move together with the bolt 23 inside the movable groove 21. Finally, the mounting plate 24 will be stored in the inner wall of the movable groove 21, so that the drying absorbent plate 25 can be removed. The operator can replace the drying absorbent plate 25 through this step.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A portable modular instrument transformer withstand voltage measuring box, comprising a withstand voltage measuring box (1), characterized in that: The pressure measuring box (1) is provided with a sealing box cover (2) on the rear side. The pressure measuring box (1) and the sealing box cover (2) are rotatably connected by a hinge (3). The control panel (12) is fixedly installed inside the pressure measuring box (1). The control panel (12) has a pressure groove (13) on its edge. The pressure measuring box (1) has an installation groove (14) inside. A wedge (15) is movably installed inside the installation groove (14). One end of the wedge (15) extends into the pressure groove (13). An airbag (16) is installed inside the installation groove (14). The airbag (16) and the wedge (15) abut against each other. A sealing gasket (17) is fixedly installed on the top of the airbag (16). The sealing gasket (17) and the airbag (16) are interconnected. A protruding edge (27) is fixedly installed on the bottom of the sealing box cover (2). The protruding edge (27) corresponds to the pressure groove (13).

2. The portable combined transformer withstand voltage measuring box according to claim 1, characterized in that: The bottom of the sealing box cover (2) is provided with a sealing groove (26), the sealing groove (26) and the protrusion (27) are in corresponding positions, and the sealing air cushion (17) can fill the interior of the sealing groove (26) after the sealing box cover (2) is closed.

3. The portable combined current transformer withstand voltage measuring box according to claim 1, characterized in that: The inclined surface of the wedge (15) is opened in the upward direction, and the convex edge (27) can displace the wedge (15) by squeezing the inclined surface of the wedge (15).

4. The portable combined current transformer withstand voltage measuring box according to claim 1, characterized in that: A locking hook (28) is fixedly installed on the front side of the sealing box cover (2), and a buckle (11) is provided on the front side of the pressure measuring box (1). The buckle (11) and the locking hook (28) cooperate with each other to fix the sealing box cover (2).

5. The portable combined transformer withstand voltage measuring box according to any one of claims 1-4, characterized in that: The sealing box cover (2) has movable grooves (21) on both the left and right sides inside. An installation plate (24) is movably installed inside the movable groove (21). One end of the two sets of installation plates (24) extends to the outside of the movable groove (21), and a drying and water-absorbing plate (25) is provided between the installation plate (24) and the sealing box cover (2).

6. The portable combined current transformer withstand voltage measuring box according to claim 5, characterized in that: Bolts (23) are provided inside the two sets of movable slots (21). One end of the bolt (23) is rotatably connected to the mounting plate (24), and the other end of the bolt (23) is threadedly connected to the outer wall of the sealing box cover (2). The bolt (23) extends through to the outside of the sealing box cover (2) and is fixedly connected to the knob (22).

7. The portable combined transformer withstand voltage measuring box according to claim 5, characterized in that: The dry absorbent plate (25) is composed of silica gel, and the surface of the dry absorbent plate (25) is provided with small holes to increase the contact area between the dry absorbent plate (25) and the air.

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