A handcart type SF6 vacuum-filling device

Abstract

The utility model discloses a handcart type SF6 vacuumizing and aerating device, including aeration mechanism, winding mechanism and fixed establishment, the aeration mechanism includes the car body, the gas cylinder, pressure reducing valve and the gas pipe, the gas cylinder is located on the car body, the export of gas cylinder is linked together with the import of pressure reducing valve, the export of pressure reducing valve is linked together with the import of gas pipe, the winding mechanism is located on the car body, the winding mechanism is used for winding the gas pipe, the fixed establishment is located on the car body, the fixed establishment is used for fixing the gas pipe after drawing, the utility model has the advantages of: winding mechanism stores the gas pipe on the car body, only needs to release the length required when drawing, the gas pipe does not need to drag on the ground, reduces the outer layer wear and tear caused by the friction with the ground, rolling, the fixed establishment fixes the gas pipe that draws into the straight line or big curvature state, avoids sharp angle bending, ensures that the gas flow cross section is not blocked, and the aeration flow is stable.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment, specifically to a handcart-type SF6 vacuum filling device. Background Technology

[0002] With the rapid development of the power industry, the voltage levels and capacities of electrical equipment are constantly increasing, placing more stringent demands on the insulation performance and arc-extinguishing capabilities of the equipment. SF6 gas, with its high insulation strength and powerful arc-extinguishing ability, has become the ideal insulation and arc-extinguishing medium for high-voltage and ultra-high-voltage electrical equipment. Throughout the entire lifecycle of electrical equipment, whether it's the vacuuming operation performed during initial installation to ensure the purity of SF6 gas, the need to replenish gas during operation due to gas leaks, or the refilling after maintenance, vacuuming and refilling operations are frequent and crucial.

[0003] Chinese utility model patent CN211585816U discloses an SF6 gas vacuuming and charging device to prevent oil backflow. The device includes a housing, four casters fixedly mounted on the bottom, four lifting rings fixedly mounted on the top, a control unit fixedly mounted inside the housing (penetrating the right side), a Roots pump fixedly mounted on the bottom inner wall of the housing, an air inlet pipe located on the front of the control unit and penetrating the left side of the housing connected to the input end of the Roots pump, and an oil-liquid separator fixedly mounted inside the housing (located on the back of the Roots pump). A compressor located to the right of the Roots pump is fixedly installed on the bottom inner wall of the housing. A media conduit penetrating the front of the housing is connected to the top of the compressor. A pusher is fixedly installed on the outside right side of the housing. A pipe compartment is embedded on the right side of the housing. A crossbar is fixedly installed inside the pipe compartment. A limit seat located above the crossbar is fixedly installed on the left side of the inner wall of the pipe compartment. A conduit penetrating the bottom of the pipe compartment and wrapped around the outside of the crossbar is connected to the top of the compressor. A connector located inside the limit seat is connected to the top of the conduit. A proximity switch is fixedly installed on the top inner wall of the housing and inside the pipe compartment.

[0004] The aforementioned technologies have the following drawbacks: during inflation, the tube needs to be pulled, which not only drags on the ground, easily causing damage, but also causes bending, affecting the normal inflation process. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a handcart-type SF6 vacuum inflation device to solve the technical problems of easy bending and dragging of the air pipe during the inflation process in the prior art.

[0006] To achieve the above technical objectives, the present invention provides a handcart-type SF6 vacuum inflation device, including an inflation mechanism. The inflation mechanism includes a vehicle body, a gas cylinder, a pressure reducing valve, and an air pipe. The gas cylinder is mounted on the vehicle body, and the outlet of the gas cylinder is connected to the inlet of the pressure reducing valve. The outlet of the pressure reducing valve is connected to the inlet of the air pipe. A winding mechanism, mounted on the vehicle body, for winding up the air hose; and... A fixing mechanism is provided on the vehicle body and is used to fix the air tube after it is extracted.

[0007] In some embodiments, the winding mechanism includes a support rod, a winding reel, and a spiral spring. The support rod is mounted on the vehicle body, the winding reel is rotatably connected to the support rod, one end of the spiral spring is connected to the support rod, and the other end of the spiral spring is connected to the winding reel. The restoring force of the spiral spring drives the winding reel to rotate in order to wind up the air hose.

[0008] In some embodiments, the winding mechanism further includes a plurality of partitions, which are spaced apart on the winding reel along the width direction of the winding reel. Adjacent partitions form a receiving cavity for accommodating the air tube. The plurality of partitions are inclined and the plurality of receiving cavities are connected in sequence.

[0009] In some embodiments, the fixing mechanism includes a support block and a plug rod. The support block is mounted on the vehicle body and has a socket. The edge of the take-up reel is provided with a plurality of slots spaced apart along the rotation direction of the take-up reel, and the plug rod passes through the socket and any of the slots.

[0010] In some embodiments, the end of the insert near the take-up reel is spherical.

[0011] In some embodiments, the fixing mechanism further includes a spring sleeved on the insert rod, one end of the spring being connected to the insert rod and the other end of the spring being connected to the support block. The spring is in a stretched state, and the spring causes the insert rod to tend to slide towards the winding reel.

[0012] In some embodiments, the inflation device further includes a tensioning mechanism, which includes a first tensioning wheel and a second tensioning wheel. The first tensioning wheel and the second tensioning wheel are rotatably connected to the vehicle body, and the first tensioning wheel and the second tensioning wheel abut against both sides of the air pipe.

[0013] In some embodiments, the tensioning mechanism further includes an elastic layer disposed on the surfaces of the first tensioning wheel and the second tensioning wheel.

[0014] Compared with the prior art, the beneficial effects of this utility model include: the winding mechanism stores the air tube on the vehicle body, and only the required length needs to be released when pulling it out, so that the air tube does not need to be dragged on the ground, reducing the wear of the outer layer caused by friction and crushing with the ground; the fixing mechanism fixes the pulled-out air tube in a straight line or a large curvature state, avoiding sharp angle bends, ensuring that the gas flow section is not obstructed, and the inflation flow is stable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the inflation device provided by this utility model; Figure 2 This is a schematic diagram of the overall structure of the winding reel provided by this utility model; Figure 3 This utility model provides Figure 1 Enlarged view of the local structure at point A in the middle.

[0016] Explanation of reference numerals in the attached figures: 1. Inflation mechanism; 11. Vehicle body; 12. Gas cylinder; 13. Pressure reducing valve; 14. Air pipe; 2. Rewinding mechanism; 21. Support rod; 22. Rewinding reel; 23. Vortex spring; 24. Partition plate; 25. Receiving cavity; 3. Fixing mechanism; 31. Support block; 32. Insert rod; 33. Insertion hole; 34. Slot; 35. Spring; 4. Tensioning mechanism; 41. First tensioning wheel; 42. Second tensioning wheel; 43. Elastic layer. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0018] This utility model provides a handcart-type SF6 vacuum pumping and inflation device, the structure of which is as follows: Figure 1 - Figure 3 As shown, it includes an inflation mechanism 1, a winding mechanism 2, and a fixing mechanism 3.

[0019] The inflation mechanism 1 includes a vehicle body 11, a gas cylinder 12, a pressure reducing valve 13, and an air pipe 14. The gas cylinder 12 is mounted on the vehicle body 11, and the outlet of the gas cylinder 12 is connected to the inlet of the pressure reducing valve 13. The outlet of the pressure reducing valve 13 is connected to the inlet of the air pipe 14.

[0020] The winding mechanism 2 is mounted on the vehicle body 11 and is used to wind up the air pipe 14.

[0021] The fixing mechanism 3 is installed on the vehicle body 11, and the fixing mechanism 3 is used to fix the extracted air pipe 14.

[0022] When not inflating, the air hose 14 is wound and stored by the winding mechanism 2 to prevent it from scattering. During inflation, the operator pulls the required length of air hose 14 from the winding mechanism 2 according to the distance between the equipment to be inflated and the vehicle body 11. Once the air hose 14 is pulled to the appropriate length, it is fixed to a pre-set bracket or crossbar on the vehicle body 11 by the fixing mechanism 3, keeping the air hose 14 suspended between the vehicle body 11 and the equipment or close to the side of the vehicle body 11, preventing it from contacting the ground. The fixed air hose 14 is in a naturally extended state, and with the damping force of the winding mechanism 2, it effectively prevents bending. Simultaneously, the gas cylinder 12, pressure reducing valve 13, and air hose 14 of the inflation mechanism 1 form a continuous passage. SF6 gas, after being depressurized by the pressure reducing valve 13, is stably delivered to the equipment to be inflated through the unbent air hose 14.

[0023] In this utility model, the winding mechanism 2 stores the air pipe 14 on the vehicle body 11. When pulling out, only the required length needs to be released. The air pipe 14 does not need to be dragged on the ground, reducing the wear of the outer layer caused by friction and crushing with the ground. The fixing mechanism 3 fixes the pulled-out air pipe 14 in a straight line or a large curvature state to avoid sharp angle bends, ensure that the gas flow section is not obstructed, and ensure stable inflation flow.

[0024] To rewind air hose 14, please refer to... Figure 1 In a preferred embodiment, the winding mechanism 2 includes a support rod 21, a winding reel 22, and a spiral spring 23. The support rod 21 is mounted on the vehicle body 11, the winding reel 22 is rotatably connected to the support rod 21, one end of the spiral spring 23 is connected to the support rod 21, and the other end of the spiral spring 23 is connected to the winding reel 22. The restoring force of the spiral spring 23 drives the winding reel 22 to rotate, so as to wind up the air pipe 14.

[0025] During use, the restoring force of the spiral spring 23 drives the winding reel 22 to rotate automatically, which can tightly wind the used air hose 14 onto the winding reel 22, so that the air hose 14 is completely detached from the ground. Compared with the traditional method of manual sorting or random stacking, the friction contact between the air hose 14 and the ground is reduced, which can effectively prevent ground gravel and oil stains from scratching or corroding the outer layer of the air hose 14.

[0026] To reduce the possibility of the air tube 14 getting tangled on the take-up reel 22, please refer to... Figure 2 In a preferred embodiment, the winding mechanism 2 further includes a plurality of partitions 24, which are spaced apart on the winding reel 22 along the width direction. Adjacent partitions 24 form a receiving cavity 25 for accommodating the air tube 14. The plurality of partitions 24 are inclined and the plurality of receiving cavities 25 are connected in sequence.

[0027] In use, adjacent partitions 24 form independent receiving cavities 25, which can divide the air tube 14 into multiple segments along the width direction of the winding reel 22. In traditional designs without partitions 24, the air tube 14 is prone to shifting along the axial direction of the reel during winding, resulting in cross-winding during multi-layer winding; while the partitions 24 can restrict the axial displacement of the air tube 14, so that each turn of the air tube 14 falls precisely into the corresponding receiving cavity 25, and achieves layered and orderly winding in conjunction with the rotation of the winding reel 22.

[0028] To secure the take-up reel 22, please refer to... Figure 1 In a preferred embodiment, the fixing mechanism 3 includes a support block 31 and a plug rod 32. The support block 31 is disposed on the vehicle body 11 and has a plug hole 33. The edge of the take-up reel 22 is provided with a plurality of slots 34 at intervals along the rotation direction of the take-up reel 22. The plug rod 32 passes through the plug hole 33 and any slot 34.

[0029] In use, multiple slots 34 evenly distributed along the circumferential direction on the edge of the reel 22 can cover the entire rotation range of the reel 22. When the operator pulls out the air tube 14 to the target length, there will always be a slot 34 that can be precisely aligned with the insertion hole 33 of the support block 31. After inserting the insertion rod 32, the rotation of the reel 22 can be restricted by rigid constraint, preventing the restoring force of the spiral spring 23 from driving the reel 22 to rotate in the opposite direction, thus preventing the air tube 14 from being automatically retracted during inflation.

[0030] To make it easier for the insert 32 to slide into the slot 34, please refer to... Figure 1 In a preferred embodiment, the end of the insert 32 near the take-up reel 22 is spherical.

[0031] During use, the spherical end forms a guiding effect through the arc surface. Even if there is a slight coaxial deviation between the insertion hole 33 and the slot 34, the arc surface of the spherical end can first contact the edge of the slot 34 or the inner wall of the insertion hole 33. Through the force guidance at the contact point, the insertion angle of the insertion rod 32 is automatically corrected, so that the insertion rod 32 slides into the slot 34 along the arc surface without the need for deliberate alignment.

[0032] To improve the stability of the insertion rod 32, please refer to... Figure 3 In a preferred embodiment, the fixing mechanism 3 further includes a spring 35, which is sleeved on the insert rod 32. One end of the spring 35 is connected to the insert rod 32, and the other end of the spring 35 is connected to the support block 31. The spring 35 is in a stretched state, and the spring 35 causes the insert rod 32 to slide towards the winding reel 22.

[0033] In use, on the one hand, when the spring 35 is in a stretched state, its restoring force continuously applies a pulling force towards the take-up reel 22 to the insert rod 32, ensuring that the insert rod 32 is always tightly abutted against the bottom of the slot 34. Even when the device moves or the work site vibrates, the insert rod 32 will not loosen or disengage from the slot 34 due to bumps. On the other hand, when the operator pulls the air hose 14 to the target length, the preload of the spring 35 ensures that the insert rod 32 always tends to move closer to the take-up reel 22. When a slot 34 of the take-up reel 22 rotates to a position close to the insertion hole 33, the end of the insert rod 32 will automatically slide into the slot 34 under the force of the spring 35, without the need for manual force to press the insert rod 32.

[0034] To further reduce the possibility of tracheal 14 bending, please refer to Figure 1 In a preferred embodiment, the inflation device further includes a tensioning mechanism 4, which includes a first tensioning wheel 41 and a second tensioning wheel 42. The first tensioning wheel 41 and the second tensioning wheel 42 are rotatably connected to the vehicle body 11, and the first tensioning wheel 41 and the second tensioning wheel 42 respectively abut against both sides of the air pipe 14.

[0035] During use, the air hose 14 is prone to local slack due to fluctuations in the damping force of the spiral spring 23 and uneven operating force during the release or rewinding process of the reel 22. Especially when there is a height difference between the vehicle body 11 and the equipment to be inflated, the slack section is prone to sharp-angle bends, resulting in a reduction or even blockage of the gas flow cross section. The first tensioning wheel 41 and the second tensioning wheel 42 abut against both sides of the air hose 14 respectively, forming a flexible clamp. The abutting force of the two wheels keeps the air hose 14 in a slightly taut state at all times, avoiding local slack and sagging, and solving the problem of sudden drop in inflation flow caused by bending.

[0036] To reduce the possibility of damage to trachea 14, please refer to Figure 1 In a preferred embodiment, the tensioning mechanism 4 further includes an elastic layer 43, which is disposed on the surface of the first tensioning wheel 41 and the second tensioning wheel 42. The elastic layer 43 is made of rubber and has a thickness of 1 mm.

[0037] When in use, if the clamping force of the traditional rigid tensioning wheel on the air tube 14 is not properly controlled, rigid compression is likely to occur. The deformation characteristics of the elastic layer 43 can make the clamping force evenly distributed on the contact surface, avoid local stress concentration, and prevent deformation or damage to the cross section of the air tube 14.

[0038] To better understand this utility model, the following is combined with... Figure 1 - Figure 3The working principle of a handcart-type SF6 vacuum inflation device according to the present invention is described in detail below: When not inflating, the air hose 14 is wound and stored by the winding mechanism 2 to prevent it from falling out. During inflation, the operator pulls out the required length of air hose 14 from the winding mechanism 2 according to the distance between the equipment to be inflated and the vehicle body 11. After the air hose 14 is pulled out to the appropriate length, it is fixed to a pre-set bracket or crossbar on the vehicle body 11 by the fixing mechanism 3, so that the air hose 14 is suspended between the vehicle body 11 and the equipment or close to the side of the vehicle body 11, avoiding contact with the ground. The fixed air hose 14 is in a naturally extended state, and with the damping force of the winding mechanism 2, it can effectively avoid bending. At the same time, the gas cylinder 12, the pressure reducing valve 13 and the air hose 14 of the inflation mechanism 1 form a continuous passage. After the SF6 gas is depressurized by the pressure reducing valve 13, it is stably delivered to the equipment to be inflated through the unbent air hose 14.

[0039] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A handcart-type SF6 vacuum filling device, characterized in that, include: An inflation mechanism, comprising a vehicle body, a gas cylinder, a pressure reducing valve, and a gas pipe, wherein the gas cylinder is mounted on the vehicle body, the outlet of the gas cylinder is connected to the inlet of the pressure reducing valve, and the outlet of the pressure reducing valve is connected to the inlet of the gas pipe. A winding mechanism is mounted on the vehicle body and is used to wind up the air hose. A fixing mechanism is provided on the vehicle body and is used to fix the extracted air tube. The winding mechanism includes a support rod, a winding reel, and a torsion spring. The support rod is mounted on the vehicle body, the winding reel is rotatably connected to the support rod, one end of the torsion spring is connected to the support rod, and the other end of the torsion spring is connected to the winding reel. The restoring force of the torsion spring drives the winding reel to rotate in order to wind up the air tube. The fixing mechanism includes a support block and a plug rod. The support block is mounted on the vehicle body and has a plug hole. The edge of the take-up reel has multiple slots spaced apart along the rotation direction of the take-up reel. The plug rod passes through the plug hole and any slot.

2. The handcart-type SF6 vacuum filling device according to claim 1, characterized in that, The winding mechanism also includes multiple partitions, which are spaced apart on the winding reel along the width direction. Adjacent partitions form a receiving cavity for accommodating the air tube. The multiple partitions are all inclined and the multiple receiving cavities are connected in sequence.

3. The handcart-type SF6 vacuum filling device according to claim 1, characterized in that, The end of the insertion rod near the take-up reel is spherical.

4. The handcart-type SF6 vacuum filling device according to claim 1, characterized in that, The fixing mechanism also includes a spring, which is sleeved on the insert rod. One end of the spring is connected to the insert rod, and the other end of the spring is connected to the support block. The spring is in a stretched state, and the spring causes the insert rod to slide towards the winding reel.

5. A handcart-type SF6 vacuum filling device according to claim 1, characterized in that, The inflation device also includes a tensioning mechanism, which includes a first tensioning wheel and a second tensioning wheel. The first tensioning wheel and the second tensioning wheel are rotatably connected to the vehicle body, and the first tensioning wheel and the second tensioning wheel respectively abut against both sides of the air pipe.

6. A handcart-type SF6 vacuum filling device according to claim 5, characterized in that, The tensioning mechanism further includes an elastic layer, which is disposed on the surfaces of the first tensioning wheel and the second tensioning wheel.

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