An equal pressure airtight detection device for ring main unit

Abstract

The utility model discloses a kind of ring main unit equal-pressure airtight detection devices, including workbench, the top outer wall of workbench is fixed with detection box, the outer wall of the side of workbench away from the detection box is connected with first electric push rod, the output end of first electric push rod is connected with fixed platform, further include: adjusting mechanism: the adjusting mechanism includes four handles of ring array connected in the outer wall of fixed platform, the outer wall of one side of handle is connected with driving gear, the inside of fixed platform is equipped with four mounting cavities of ring array, the inner wall of mounting cavity is equipped with two limit grooves of symmetrical distribution, the inner wall of both sides of limit groove is connected with same fixed block, the outer wall of both sides of fixed block is connected with limit block. Ring main unit equal-pressure airtight detection device disclosed in the utility model has the effect of adapting different sizes of ring main unit and improving the stability of clamping for different shapes of ring main unit.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to a pressure-tightness detection device for a ring network box. Background Technology

[0002] As a crucial power distribution device in the power system, the airtightness of the ring main unit directly affects the safe and stable operation of the power system. During the production, installation, and maintenance of the ring main unit, its sealing performance needs to be rigorously tested using an isobaric airtightness testing device to ensure that no gas leakage occurs during operation, thereby guaranteeing the normal operation of the power equipment and the reliable power supply from the power grid.

[0003] However, the fixed platform size of the traditional ring network box pressure tightness testing device is fixed and cannot be adjusted according to different sizes of ring network boxes. When different specifications of ring network boxes need to be tested, different testing devices need to be replaced, which increases the testing cost and reduces the testing efficiency. For example, when using traditional devices to fix ring mesh boxes, if the ring mesh box is too small, the fixing platform has too much space, resulting in unstable clamping. However, if the ring mesh box is too large, the fixing platform cannot accommodate it, and another set of devices must be used, which slows down the testing progress. Utility Model Content

[0004] This utility model discloses a pressure-equal airtightness testing device for ring network boxes, aiming to solve the technical problem that the size of traditional pressure-equal airtightness testing devices for ring network boxes is fixed and cannot be adjusted according to different sizes of ring network boxes. When different specifications of ring network boxes need to be tested, different testing devices need to be replaced, which increases the testing cost and reduces the testing efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A ring network box pressure-tightness testing device includes a workbench, a testing box fixed to the top outer wall of the workbench, a first electric push rod connected to the outer wall of the workbench away from the testing box, and a fixed platform connected to the output end of the first electric push rod. The device also includes: an adjustment mechanism comprising four handles arranged in a circular array on the outer wall of the fixed platform, a drive gear connected to one side of the handles, four mounting cavities arranged in a circular array inside the fixed platform, two symmetrically distributed limiting grooves on the inner wall of each mounting cavity, a common fixing block connected to the inner walls of the limiting grooves, limiting blocks connected to the outer walls of the fixing blocks, limiting blocks connected to the inner walls of the limiting grooves, a lead screw penetrating the interior of the fixing block, a driven gear connected to one side of the lead screw, two driven gears meshing with the drive gear, and a common connecting seat connected to the top outer walls of the two fixing blocks; and a clamping mechanism located on one side of the connecting seat.

[0006] By adopting the above technical solution, the adjustment mechanism includes four handles arranged in a ring array connected to the outer wall of the fixed platform. The handles are used by the operator to grip and apply rotational force to drive the drive gear on one side of the outer wall to rotate. At this time, the fixed platform has four mounting cavities arranged in a ring array inside, which provide mounting space for internal components. At this time, there are two symmetrically distributed limiting grooves on the inner wall of the mounting cavity. The inner walls of the two limiting grooves are connected to the same fixed block, and the outer walls of the two fixed blocks are connected to limiting blocks. At this time, the limiting blocks cooperate with the limiting grooves to guide the movement of the fixed blocks. At this time, a lead screw runs through the inside of the fixed block. When the lead screw rotates, it can drive the fixed block to move along its axial direction. At this time, driven gears are connected to one side of the outer wall of the lead screw. Two driven gears mesh with the drive gear, so that the driven gears can transmit the power of the drive gear to the lead screw, thereby making the two lead screws rotate synchronously. At this time, the top outer walls of the two fixed blocks are connected to the same connecting seat, which is used to connect related components.

[0007] As a further embodiment of this utility model: the clamping mechanism includes four equally spaced support blocks connected to the outer wall of one side of the connecting seat, a fixed seat connected to the outer wall of the support block away from the connecting seat, and a connecting block connected to the outer wall of the fixed seat away from the support block.

[0008] By adopting the above technical solution, the clamping mechanism includes four equally spaced support blocks connected to the outer wall of one side of the connecting seat. The support blocks are used to support the fixed seat. At this time, the fixed seat is connected to the outer wall of the support block away from the connecting seat. The fixed seat is used to install the connecting block and provide support for the connecting block connected to the outer wall of the fixed seat. The connecting block is connected to the outer wall of the fixed seat away from the support block. At this time, the connecting block directly contacts the ring network box, thereby realizing the clamping and fixing of the ring network box.

[0009] In summary, this application includes at least one of the following beneficial technical effects: 1. Adaptable to ring network boxes of different sizes, the drive gear is driven to rotate by rotating the handles arranged in a circular array around the fixed platform. The drive gear meshes with two driven gears on its outer wall, thereby enabling the driven gears to drive the lead screw to rotate synchronously. At this time, the fixed block is guided to move along the lead screw axially through the cooperation of the limiting groove and the limiting block, thereby driving the connecting seat to adjust its position synchronously, thus adapting to ring network boxes of different sizes.

[0010] 2. Improve the stability of clamping ring network boxes of different shapes. By using four equally spaced connecting blocks installed at equal intervals on one side of the outer wall of the connecting seat to form a distributed layout of multiple support points, it is possible to achieve multi-point fit on the irregular shape of the surface of the ring network box, avoid local clamping failure caused by the irregular shape of the ring network box, and thus improve the stability of clamping ring network boxes of different shapes.

[0011] Other features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a ring network box pressure airtightness testing device proposed in this utility model.

[0013] Figure 2 This is a side view of the test box structure of a ring network box equal pressure airtightness testing device proposed in this utility model.

[0014] Figure 3 This is a schematic diagram of the adjustment mechanism of a ring network box equal pressure airtightness detection device proposed in this utility model.

[0015] Figure 4 This is a schematic diagram of the clamping mechanism of a ring network box equal pressure airtightness testing device proposed in this utility model.

[0016] Figure 5 For the present utility model in Figure 3 A magnified structural diagram of point A in the middle.

[0017] In the attached diagram: 1. Workbench; 2. Testing box; 3. Nitrogen tank; 4. First electric push rod; 5. Fixed platform; 6. Connecting seat; 7. Second electric push rod; 8. Air nozzle; 9. Driving gear; 10. Driven gear; 11. Lead screw; 12. Sealing curtain; 13. Support block; 14. Fixed seat; 15. Connecting block; 16. Fixed block; 17. Limiting block. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Reference Figure 1 , Figure 3 and Figure 5A ring network box pressure tightness testing device includes a workbench 1, a testing box 2 fixed to the top outer wall of the workbench 1, a first electric push rod 4 connected to the outer wall of the workbench 1 away from the testing box 2, and a fixed platform 5 connected to the output end of the first electric push rod 4. The device also includes: an adjustment mechanism: the adjustment mechanism includes four handles arranged in a ring array connected to the outer wall of the fixed platform 5, a drive gear 9 connected to one side of the outer wall of each handle, four mounting cavities arranged in a ring array inside the fixed platform 5, two symmetrically distributed limiting grooves on the inner wall of each mounting cavity, a fixed block 16 connected to the inner walls of both sides of the limiting groove, limiting blocks 17 connected to the outer walls of both sides of the fixed block 16, limiting blocks 17 connected to the inner walls of the limiting grooves, a lead screw 11 penetrating inside the fixed block 16, a driven gear 10 connected to one side of the outer wall of the lead screw 11, the two driven gears 10 meshing with the drive gear 9, and a connecting seat 6 connected to the top outer wall of the two fixed blocks 16; and a clamping mechanism: the clamping mechanism is located on one side of the outer wall of the connecting seat 6.

[0020] Specifically, the adjustment mechanism includes four handles arranged in a circular array on the outer wall of the fixed platform 5. These handles are for the operator to grip and apply rotational force to drive the drive gear 9 on one side of the outer wall. The fixed platform 5 has four mounting cavities arranged in a circular array inside, providing mounting space for internal components. Each mounting cavity has two symmetrically distributed limiting grooves on its inner wall. The inner walls of each limiting groove are connected to the same fixing block 16, and the outer walls of each fixing block 16 are connected to limiting blocks 17. The limiting blocks 17 then engage with the limiting grooves. The two fixed blocks 16 are connected to the same connecting seat 6, which is used to guide the movement of the fixed block 16. At this time, a lead screw 11 passes through the inside of the fixed block 16. When the lead screw 11 rotates, it can drive the fixed block 16 to move along its axial direction. At this time, a driven gear 10 is connected to one side of the outer wall of the lead screw 11. Two driven gears 10 mesh with the driving gear 9, so that the driven gears 10 can transmit the power of the driving gear 9 to the lead screw 11, thereby making the two lead screws 11 rotate synchronously. At this time, the same connecting seat 6 is connected to the top outer wall of the two fixed blocks 16. The connecting seat 6 is used to connect related components.

[0021] The top outer wall of the lead screw 11 is provided with two symmetrically distributed sealing curtains 12. The sealing curtains 12 are foldable structures. The outer walls of the opposite sides of the two sealing curtains 12 are connected to the outer wall of the same connecting seat 6. The sealing curtains 12 prevent external dust from entering the installation cavity and protect the internal components from contamination. The sealing curtains 12 can extend and deform as the connecting seat 6 moves.

[0022] Specifically, the inner wall of the fixing block 16 is provided with a threaded groove, and the outer wall of the lead screw 11 and the threaded groove are used in conjunction. The threaded groove matches the thread on the outer wall of the lead screw 11, and the rotational motion of the lead screw 11 is converted into the linear motion of the fixing block 16 through thread transmission, thereby realizing the adjustment of the position of the connecting seat 6.

[0023] Reference Figure 3 and Figure 4 In a preferred embodiment, the clamping mechanism includes four equally spaced support blocks 13 connected to one outer wall of the connecting seat 6. A fixing seat 14 is connected to the outer wall of the support block 13 away from the connecting seat 6, and a connecting block 15 is connected to the outer wall of the fixing seat 14 away from the support block 13.

[0024] Specifically, the clamping mechanism includes four equally spaced support blocks 13 connected to the outer wall of one side of the connecting seat 6. The support blocks 13 are used to support the fixing seat 14. At this time, the fixing seat 14 is connected to the outer wall of the support block 13 away from the connecting seat 6. The fixing seat 14 is used to install the connecting block 15 and provide support for the connecting block 15 connected to the outer wall of the fixing seat 14. The connecting block 15 is connected to the outer wall of the fixing seat 14 away from the support block 13. At this time, the connecting block 15 directly contacts the ring network box, thereby realizing the clamping and fixing of the ring network box.

[0025] The support block 13 has a movable groove on one side of its outer wall. The fixed seat 14 is rotatably connected to the inner wall of the movable groove. The movable groove provides rotation space for the fixed seat 14, so that the fixed seat 14, which is rotatably connected to the inner wall of the movable groove, can adapt to the tilt angle of the ring network box surface by rotation, ensuring that the connecting block 15 fits tightly with the ring network box.

[0026] In particular, the outer wall of the connecting block 15 away from the fixing seat 14 is made of flexible material, which increases the contact area with the ring network box by generating a certain deformation when clamping the ring network box.

[0027] Reference Figure 1 and Figure 2 In a preferred embodiment, a differential pressure sensor is provided on one outer wall of the detection box 2, a second electric push rod 7 is connected to the top inner wall of the detection box 2, a cover plate is connected to the output end of the second electric push rod 7, a plurality of air nozzles 8 are connected to the bottom outer wall of the cover plate, a nitrogen tank 3 is connected to the top outer wall of the detection box 2, and the top outer walls of the plurality of air nozzles 8 are connected to the outer wall of the same nitrogen tank 3 through connecting pipes.

[0028] Specifically, the distance between the cover plate and the ring network box is adjusted by the second electric push rod 7. The cover plate is used to provide installation positions for multiple air nozzles 8. At this time, the nitrogen tank 3 connected to the top outer wall of the detection box 2 provides the required gas source for detection. The top outer walls of multiple air nozzles 8 are connected to the outer wall of the same nitrogen tank 3 through connecting pipes, so that the nitrogen in the nitrogen tank 3 is delivered to each air nozzle 8 through the connecting pipes, realizing the distribution supply of nitrogen. At this time, the nitrogen in the nitrogen tank 3 is evenly sprayed out to the detection area in the ring network box through the air nozzles 8. Finally, the detection data is displayed on the differential pressure photosensitive sensor.

[0029] Working principle: During use, place the ring mesh box on the surface of the fixed platform 5, ensuring that the air inlet of the ring mesh box faces downwards towards the detection box 2. The operator then grips the four handles arranged in a circular array on the outer wall of the fixed platform 5 and applies rotational force, causing the drive gear 9 on one side of the handle to rotate synchronously. The drive gear 9 meshes with the two driven gears 10 on its two sides, thus transmitting rotational power to the driven gears 10, which in turn drives the lead screw 11 connected to the driven gears 10 to rotate synchronously. At this time, a fixing block 16 passes through the lead screw 11, and its inner thread groove engages with the outer thread of the lead screw 11, thereby achieving the rotation of the lead screw 11. The rotary motion is converted into linear motion of the fixed block 16 through threaded transmission. Simultaneously, the limiting blocks 17 on both outer walls of the fixed block 16 are embedded in the inner walls of the symmetrical limiting grooves on the inner walls of the mounting cavity, thus providing a guiding effect when the fixed block 16 moves. At this time, the tops of the two fixed blocks 16 are connected to the same connecting seat 6, so that the movement of the fixed block 16 drives the connecting seat 6 to adjust its position synchronously. Ultimately, this ensures that the clamping mechanism on one side of the connecting seat 6 is precisely aligned with the surface of the ring network box, thereby achieving the effect of adapting to ring network boxes of different lengths and widths. Furthermore, the four equally spaced support blocks 13 on one side of the connecting seat 6 provide support for the fixed seat 14. The support block 13 provides rigid support, while the fixed base 14 is used to install the connecting block 15. A movable groove on one side of the outer wall of the support block 13 provides rotation space for the fixed base 14. The fixed base 14 rotates around the inner wall of the movable groove, allowing the connecting block 15 to adapt to the tilt angle of the ring network box surface, thus ensuring tight contact. The side of the connecting block 15 away from the fixed base 14 is made of flexible material, undergoing slight deformation upon contact with the ring network box, increasing the contact area. This avoids rigid damage to the ring network box surface and achieves firm clamping through multi-point force distribution, preventing displacement of the ring network box during testing. At this point, the first electric push is activated... Rod 4, whose output end pushes the fixed platform 5 to move along the surface of the workbench 1, so that the fixed platform 5 enters the interior of the test chamber 2. At this time, by activating the second electric push rod 7 on the inner wall of the top of the test chamber 2, the cover plate and the multiple air nozzles 8 at its bottom are driven to move downward and combine with the air inlet at the top of the ring network box. At this time, the nitrogen tank 3 at the top of the test chamber 2 delivers nitrogen to each air nozzle 8 through the connecting pipe. The air nozzles 8 spray nitrogen evenly into the interior of the ring network box, so that a stable test pressure is formed inside the ring network box. The operator monitors the pressure difference inside and outside the ring network box in real time through the differential pressure sensor on one side of the test chamber 2 to determine whether the airtightness performance of the ring network box meets the standard.

[0030] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A ring network box pressure tightness testing device, comprising a workbench (1), a testing box (2) fixed to the top outer wall of the workbench (1), a first electric push rod (4) connected to the outer wall of the workbench (1) away from the testing box (2), and a fixed platform (5) connected to the output end of the first electric push rod (4), characterized in that, Also includes: Adjustment mechanism: The adjustment mechanism includes four handles arranged in a ring array connected to the outer wall of the fixed platform (5). A drive gear (9) is connected to one side of the outer wall of the handle. The fixed platform (5) has four mounting cavities arranged in a ring array inside. The inner wall of the mounting cavity has two symmetrically distributed limiting grooves. The inner walls of the limiting grooves are connected to the same fixed block (16). The outer walls of the fixed block (16) are connected to limiting blocks (17). The limiting blocks (17) are connected to the inner wall of the limiting grooves. A lead screw (11) passes through the inside of the fixed block (16). A driven gear (10) is connected to one side of the outer wall of the lead screw (11). The two driven gears (10) mesh with the drive gear (9). The top outer walls of the two fixed blocks (16) are connected to the same connecting seat (6). Clamping mechanism: The clamping mechanism is located on one side of the outer wall of the connecting seat (6).

2. The ring network box equal pressure airtightness testing device according to claim 1, characterized in that, The top outer wall of the lead screw (11) is provided with two symmetrically distributed sealing curtains (12). The sealing curtains (12) are foldable structures, and the outer walls of the opposite sides of the two sealing curtains (12) are connected to the outer wall of the same connecting seat (6).

3. The ring network box equal pressure airtightness testing device according to claim 1, characterized in that, The inner wall of the fixing block (16) is provided with a threaded groove, and the outer wall of the lead screw (11) is used in conjunction with the threaded groove.

4. The ring network box equal pressure airtightness testing device according to claim 1, characterized in that, The clamping mechanism includes four equally spaced support blocks (13) connected to the outer wall of one side of the connecting seat (6). The outer wall of the support block (13) away from the connecting seat (6) is connected to a fixed seat (14), and the outer wall of the fixed seat (14) away from the support block (13) is connected to a connecting block (15).

5. The ring network box equal pressure airtightness testing device according to claim 4, characterized in that, The outer wall of one side of the support block (13) is provided with a movable groove, and the fixed seat (14) is rotatably connected to the inner wall of the movable groove.

6. The ring network box equal pressure airtightness testing device according to claim 4, characterized in that, The outer wall of the connecting block (15) away from the fixing seat (14) is made of flexible material.

7. The ring network box pressure-tightness testing device according to claim 1, characterized in that, A differential pressure sensor is provided on one side of the outer wall of the detection box (2). A second electric push rod (7) is connected to the top inner wall of the detection box (2). A cover plate is connected to the output end of the second electric push rod (7). A plurality of air nozzles (8) are connected to the bottom outer wall of the cover plate. A nitrogen tank (3) is connected to the top outer wall of the detection box (2). The top outer walls of the plurality of air nozzles (8) are connected to the outer wall of the same nitrogen tank (3) through connecting pipes.

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