Safety protection device for high-voltage equipment pressure test

Abstract

The application relates to the technical field of high-voltage test safety protection, and discloses a safety protection device for high-voltage equipment withstand voltage test, which comprises a test device, a protective shell, an extendable guardrail and a safety door, and is sequentially connected into a rectangular test area; the inside of the protective shell is provided with a carbon dioxide fire extinguishing tank and a controller; the outer wall of the protective shell is provided with an air pipe with one end connected with the carbon dioxide fire extinguishing tank; the outer wall of the air pipe penetrates through the two ends of the extendable guardrail; the outer wall of the extendable guardrail is fixedly provided with a plurality of nozzles arranged on the outer wall of the air pipe; and the outer wall of the test device is provided with a gas sensor for detecting harmful gas. Through the cooperation of the test device, the safety door and the protective device, a movable test area is formed; harmful gas is detected and isolated through the cooperation of the air pipe, the nozzles and the gas sensor; and fire extinguishing and protection during the test are realized through the cooperation of the spray pipe and the second protective plate.

Description

Technical Field

[0001] This invention relates to the field of high-voltage test safety protection technology, specifically a safety protection device for high-voltage equipment withstand voltage testing. Background Technology

[0002] During the power production process, power companies need to conduct verification tests, handover tests, and preventive tests on power equipment. Some of these tests require high-voltage tests, which have strict requirements on the test environment, high-voltage equipment, test personnel, and test methods.

[0003] A search revealed Chinese Patent Publication No. CN209486232U, which discloses a safety device for an AC withstand voltage test area. The device includes a safety door and an electrical control box. A sensor is installed on the safety door, connected to an alarm. A limit switch is also installed on the safety door, connected to a test transformer control box. An electromagnetic lock is installed on the safety door, connected in series with a main contactor and controlled by the main contactor for opening and closing. The electrical control box includes six circuits: a relay circuit, a timer circuit, a sensor circuit, an electromagnetic door lock circuit, a voltage divider indicator circuit, a voltage indicator circuit, and a current indicator circuit. Each circuit is connected in parallel. The device utilizes a limit switch and an electromagnetic lock to achieve both mechanical and electrical interlocking functions.

[0004] The above-mentioned device improves safety by making intelligent improvements to the safety gate, thus preventing personnel from accidentally entering. However, in actual use, the following problems still exist: First, the guardrail in the above-mentioned device is fixed, which makes the transportation process cumbersome when testing some high-voltage equipment. Second, when the testing equipment fails, it may cause explosions, harmful gases and fires, and there is no way to provide early warning or solutions, posing a safety hazard. Summary of the Invention

[0005] To address the shortcomings of existing technologies and solve the aforementioned technical problems, this invention provides a safety protection device for high-voltage equipment withstand pressure testing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a safety protection device for high-pressure equipment withstand pressure testing, comprising a testing device, characterized in that a safety door is rotatably mounted on one side of the testing device, and a protective device is provided on the other side of the testing device. The protective device includes a protective shell and a telescopic guardrail fitted to the other side of the testing device. The testing device, the protective shell, the telescopic guardrail, and the safety door are sequentially connected to form a rectangular testing area. A carbon dioxide fire extinguishing canister and a controller are provided inside the protective shell. A gas pipe with one end connected to the carbon dioxide fire extinguishing canister is provided on the outer wall of the protective shell. The outer wall of the gas pipe passes through both ends of the telescopic guardrail. Several nozzles are fixed on the outer wall of the telescopic guardrail and provided on the outer wall of the gas pipe. A gas sensor for detecting harmful gases is provided on the outer wall of the testing device. The controller is used to receive and process signals from the gas sensor, and to control the carbon dioxide fire extinguishing tank to spray carbon dioxide through the gas pipe and nozzle for warning, isolation and fire extinguishing.

[0007] Preferably, the protective shell has a baffle rotating on the side away from the test device. The two ends of the telescopic guardrail are respectively attached to the outer walls of the safety door and the baffle. The outer wall of the test device is rotatably connected to a second protective plate. The upper side of the protective shell is provided with a nozzle connected to a carbon dioxide fire extinguisher. There are three telescopic guardrails, which together form an opening rectangle facing the test device. The outer wall of the air pipe is provided with multiple quick connectors, which are used for quick connection and disconnection of the air pipe between the three telescopic guardrails, the baffle, the test device, and the safety door. A storage rod is fixed on one side of the test device, and an arc-shaped plate that slides and matches the storage rod is fixed on the lower side of the telescopic guardrail.

[0008] Preferably, several elastic ropes are fixed between the inner wall of the telescopic guardrail and its internal air pipe, and the air pipe is a PVC mesh corrugated pipe.

[0009] Preferably, one end of the storage rod is provided with an adjustment component, the adjustment component includes an adjustment rod that rotates with one end of the storage rod, and a connecting rod is fixed between the two adjustment rods.

[0010] Preferably, a support rod is fixed between the two storage rods, a servo motor is provided on the outer wall of the support rod, a worm gear is fixedly provided at the output end of the servo motor, and the tooth end of the worm gear is meshed with a worm wheel fixed on the outer wall of one of the adjusting rods.

[0011] Preferably, an L-shaped rod is fixed to the outer wall of an adjusting rod near the safety door, and one end of one of the telescopic guardrails is positioned between the L-shaped rod and the connecting rod.

[0012] Preferably, a locking assembly is provided on the upper side of the safety door. The locking assembly includes a fixed base fixed to the upper side of the safety door, an electric push rod on one side of the fixed base, and a locking rod sliding on the other side of the fixed base. The output end of the electric push rod is fixedly disposed at one end of the locking rod. Fixed blocks fixed to the outer wall of the test device are rotatably disposed on both sides of the safety door, and the other end of the locking rod slides through both sides of the upper fixed block.

[0013] Preferably, the outer wall of the second protective plate is provided with a sliding groove that slides in conjunction with the other end of the locking rod. One side of the second protective plate is attached to the outer wall of the test device, and an iron block is fixed to the other side of the second protective plate.

[0014] Preferably, an electromagnet is fixed to the outer wall of the test device, and the lower side of the iron block is attached to and attracted to the upper side of the electromagnet.

[0015] Preferably, the outer wall of the protective shell has a first protective plate that rotates, the outer wall of the first protective plate has a support base that is fixed, the inner wall of the support base has a T-shaped rod that slides, the outer wall of the second protective plate has a retaining seat that is fixed, and the outer wall of the retaining seat has a second sliding groove that slides with one end of the T-shaped rod.

[0016] This invention provides a safety protection device for withstand pressure testing of high-voltage equipment. It has the following beneficial effects: 1. This invention forms a movable test area through the cooperation of a test device, a safety door, and a protective device, which improves the safety and flexibility of the test area. It provides gas through a carbon dioxide fire extinguishing canister, and detects and isolates harmful gases through the cooperation of gas pipes, nozzles, and gas sensors. Furthermore, it completes fire extinguishing and protection through the cooperation of nozzles and a second protective plate, thereby improving the safety and adaptability of high-pressure equipment withstand tests.

[0017] 2. This invention improves the efficiency of assembly and disassembly of the test area through the cooperation of multiple quick connectors; and by applying tension to the air pipe with an elastic rope, the telescopic guardrail can be quickly retracted, and the telescopic guardrail can be stored by a storage rod, thereby helping to improve the testing efficiency of high-voltage equipment.

[0018] 3. This invention drives the adjusting rod to different positions through the output of the servo motor, and through the cooperation of the L-shaped rod and the connecting rod, the adjusting component improves the efficiency of the telescopic guardrail during storage, the stability during movement, and the safety during testing.

[0019] 4. The present invention drives the locking rod through the output end of the electric push rod to slide into the second protective plate by driving the locking rod through the fixed block. Thus, while locking the safety door, it also supports the second protective plate. Furthermore, through the cooperation of the electromagnet and the iron block, the locking efficiency of the second protective plate is improved, and the stability of the second protective plate when it is not locked is also improved. Attached Figure Description

[0020] Figure 1 This is a perspective view of the developed invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view of point B in the middle; Figure 4 for Figure 1 Enlarged view of point C in the middle; Figure 5 This is a perspective view of the storage device of the present invention; Figure 6 for Figure 5 Enlarged view of point D; Figure 7 for Figure 5 Enlarged view of point E in the middle; Figure 8 for Figure 5 Enlarged diagram at point F; Figure 9 This is a partial three-dimensional schematic diagram of the guardrail of the present invention.

[0021] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0022] Among them, 1. Test apparatus; 2. Safety door; 3. Locking assembly; 30. Electric push rod; 31. Fixing base; 32. Fixing block; 33. Locking rod; 34. Electromagnet; 35. Iron block; 4. Protective devices; 40. Telescopic guardrail; 41. Curved plate; 42. Nozzle; 43. Air pipe; 44. Protective shell; 45. Baffle; 46. Spray pipe; 47. Protective plate one; 48. Protective plate two; 49. Elastic rope; 5. Storage rod; 6. Adjustment assembly; 60. Adjustment rod; 61. L-shaped rod; 62. Connecting rod; 63. Servo motor; 64. Worm gear; 65. Worm; 66. Support rod; 7. Protective cover; 8. Gas sensor; 9. Quick connector; 10. T-shaped rod; 11. Support base; 12. Card slot; 13. Wireless audible and visual alarm light. Detailed Implementation

[0023] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1, please refer to the appendix. Figure 1 - Appendix Figure 5 This invention provides a safety protection device for high-voltage equipment withstand voltage testing. The testing device 1 is a high-voltage equipment without partial discharge, including a control panel and a partial discharge-free test transformer tank. A gas sensor 8 is used to detect harmful gases generated when the high-voltage equipment fails during the test and is installed on the base of the partial discharge-free test transformer. An external protective cover 7 is provided to prevent damage from external factors such as explosion or movement. The protective shell 44 is made of high-strength aluminum alloy and contains a carbon dioxide gas stabilization and distribution system, consisting of pipelines, flow sensors, and solenoid valves, for stabilizing the filling and discharging of the carbon dioxide fire extinguishing tank. The gas pipe 43 is a 304 stainless steel braided corrugated pipe, outputting liquid carbon dioxide. The nozzle 42 is an adjustable fan-shaped airflow nozzle with a fan-shaped diffusion angle of 60°–80°. The spray direction is towards the inside of the enclosure, tilted inwards and downwards at an angle of 10°–20° to the vertical direction. Both the output end of the carbon dioxide fire extinguisher and the front end of the nozzle 42 are equipped with pressure reducing valves. The first-stage pressure reducing valve (at the bottle end) outputs a pressure of 0.8–1.2 MPa, and the second-stage pressure regulating valve (near the front end of the nozzle 43) stabilizes the gas supply pressure at 0.22–0.30 MPa. In addition, another nozzle 43 and nozzle 42 can be installed at the bottom of the guardrail to improve the stability of the air curtain, such as the existing stage air curtain which uses a carbon dioxide air column machine. The controller can be a PLC programmable controller. The protective shell 44, the telescopic guardrail 40, and the bottom of the test device 1 are all equipped with self-locking pulleys for moving and fixing the equipment. The telescopic guardrail 40 is also equipped with a wireless audible and visual alarm light 13. The second protective plate 48 can be made of materials such as PC endurance board, acrylic explosion-proof board, and explosion-proof tempered glass. The controller and the test device 1 can be connected by wired or wireless means, so that the data can be displayed through the test device 1. All of the above are existing technologies. A safety protection device for high-pressure equipment withstand pressure test includes a test device 1. A safety door 2 is rotatably mounted on one side of the test device 1, and a protective device 4 is provided on the other side of the test device 1. The protective device 4 includes a protective shell 44 and a telescopic guardrail 40 that are fitted to the other side of the test device 1. The test device 1, the protective shell 44, the telescopic guardrail 40 and the safety door 2 are sequentially connected to form a rectangular test area. A carbon dioxide fire extinguishing canister and a controller are installed inside the protective shell 44. A gas pipe 43 with one end connected to the carbon dioxide fire extinguishing canister is provided on the outer wall of the protective shell 44. The outer wall of the gas pipe 43 passes through both ends of the telescopic guardrail 40. Several nozzles 42 are fixed on the outer wall of the telescopic guardrail 40 and installed on the outer wall of the gas pipe 43. A gas sensor 8 for detecting harmful gases is provided on the outer wall of the test device 1. The controller is used to receive and process the signal from the gas sensor 8, and to control the carbon dioxide fire extinguishing tank to spray carbon dioxide through the gas pipe 43 and the nozzle 42 for warning, isolation and fire extinguishing.

[0025] Specifically, during use, the telescopic guardrail 40 can be pulled open and the high-voltage equipment can be placed in the test area. If the high-voltage equipment is inconvenient to move, the test device 1, telescopic guardrail 40 and protective shell 44 can be moved to enclose the location of the high-voltage equipment to form a test area, thus solving the problem of inconvenience for the high-voltage equipment to enter and exit during testing. Before testing, the telescopic guardrail 40 is enclosed into an open rectangle, and the protective shell 44 and one end of the telescopic guardrail 40 are attached together. The two can be connected by cable ties, chains, etc. The safety gate 2 is rotated to be attached to the other end of the telescopic guardrail 40. The operator can perform pre- and post-test operations on the high-voltage equipment by opening and closing the safety gate 2. In this embodiment, an air pipe 43 extending from the protective shell 44 is first attached to the upper side of the baffle 45, then passes through one end of the telescopic guardrail 40 and enters its interior, and to the other end, another air pipe 43 extending from the protective shell 44 is attached to the outer wall of the test device 1 and the safety door 2 in sequence, and the outer wall is also provided with several nozzles 42, so that the two air pipes 43 form a rectangular test area. When the test is conducted, the high-voltage equipment is subjected to a withstand voltage test by the test device 1. During the test, the wireless sound and light alarm light 13 is turned on throughout the test to provide sound and light alarms and remind personnel not to approach. The closed test area further prevents outside personnel from entering by mistake and improves the safety of the test area. If harmful gases are generated during the test, the gas sensor 8 will detect them in real time and transmit the data to the controller. The controller will then control the carbon dioxide fire extinguishing tank to output gas. After being distributed by the system, the gas will enter the gas pipe 43 and be sprayed obliquely downward through the nozzle 42. Since the mass of both the harmful gas and carbon dioxide is greater than that of air, the harmful gas will diffuse at a low level. At this time, the controller will control the wireless audible and visual alarm light 13 to issue an evacuation audible and visual signal. After the personnel have evacuated, the carbon dioxide sprayed around the high-pressure equipment through the nozzle 42 will also continue to sink, forming an air curtain-like barrier, which will effectively reduce the diffusion speed of the harmful gas. In addition, the carbon dioxide will form a white mist when it enters the air, further reminding the outside world and the operators to evacuate in an emergency.

[0026] Example 2, please refer to the appendix. Figure 1 Appendix Figure 3 Appendix Figure 5 and attached Figure 9A baffle 45 is rotatably mounted on the side of the protective shell 44 away from the test device 1. The two ends of the telescopic guardrail are respectively attached to the outer walls of the safety door 2 and the baffle 45. A second protective plate 48 is rotatably connected to the outer wall of the test device 1. A nozzle 46 connected to a carbon dioxide fire extinguisher is provided on the upper side of the protective shell 44. There are three telescopic guardrails 40, which together form an opening rectangle facing the test device 1. Multiple quick connectors 9 are provided on the outer wall of the air pipe 43. The multiple quick connectors 9 are used for quick connection and disconnection of the air pipe 43 between the three telescopic guardrails 40, the baffle 45, the test device 1, and the safety door 2. A storage rod 5 is fixed on one side of the test device 1 and arranged side by side. An arc-shaped plate 41 that slides and matches the storage rod 5 is fixed on the lower side of the telescopic guardrail 40.

[0027] Specifically, first, the telescopic guardrail 40 is enclosed to form an open rectangle, and the baffle 45 is rotated to fit against one end of the telescopic guardrail 40. An air pipe 43 extending from the protective shell 44 is first clipped to the upper side of the baffle 45, and then passes through one end of the telescopic guardrail 40 to enter its interior. If the high-voltage equipment explodes during the test, the operator will be protected from the splashes by the protective plate 48 because he is located in front of the test device 1. The personnel will then move away immediately and notify the emergency personnel for handling. If a fire occurs in the high-voltage equipment during the test, the operator can use the handheld nozzle 46 to extinguish the fire at the base of the flames, thereby further improving the safety of the high-voltage equipment withstand voltage test. Furthermore, through the linkage between the protective device 4 and the testing device 1, the protective device 4 performs a self-check of functions such as air curtain before the pressure resistance test. In this embodiment, each quick connector 9 is equipped with a flow sensor to detect the gas flow rate in the quick connector 9 and is electrically connected to the controller. The testing device 1 and the protective shell 44 can be quickly connected and separated by methods such as snap-fit ​​and electromagnetic adsorption. The air pipe 43 extending from the protective shell 44 is first snapped onto the upper side of the baffle 45, and then connected to the nozzle 42 inside one of the telescopic guardrails 40 through a quick connector 9. The telescopic guardrail in the middle... The two ends of the air pipe 43 in the 40 are connected to the air pipes 43 in the other two telescopic guardrails 40 via quick connectors 9. One end of the air pipe 43 in the telescopic guardrail 40 on the other side is connected to the air pipe 43 that is clipped onto the safety gate 2 and the test device 1 via quick connectors 9. The air pipes 43 on the test device 1 and the protective shell 44 are also connected via a quick connector 9. This allows the three telescopic guardrails 40 to be quickly connected and disassembled. The telescopic guardrails 40 and the baffle 45, the safety gate 2, and the test device 1 and the protective shell 44 can all be quickly connected and disassembled, which helps to improve the efficiency of the device. Furthermore, before the test, the air pipe 43 and the quick connector 9 are used to leave only the gap between the telescopic guardrail 40 and the safety door 2 in the test area. After the operator finishes operating the high-voltage equipment, the air pipe 43 between the telescopic guardrail 40 and the safety door 2 can be connected. This makes the test area an invisible fence during the test, which further improves the safety of the test. If the operator fails to connect the gap between the telescopic guardrail 40 and the safety gate 2, when the operator is preparing for the test, the controller will control the air curtain function to perform a self-check before the test, that is, instantaneous inflation and deflation. However, since the air pipe 43 between the telescopic guardrail 40 and the safety gate 2 is not connected, no gas passes through the quick connector 9 on the air pipe 43 in the safety gate 2, which causes the flow sensor signal on it to be abnormal. The controller, through linkage with the test device 1, makes it impossible to perform the test, so as to remind the operator to perform a manual self-check. When the device needs to be moved, the three telescopic guardrails 40 can be disassembled and placed on the storage rod 5 in sequence with the cooperation of the arc plate 41. This allows the entire device to be moved by moving the test device 1, avoiding the tediousness of carrying each part one by one.

[0028] Example 3, please refer to the appendix. Figure 1 Appendix Figure 5 and attached Figure 9 Several elastic ropes 49 are fixed between the inner wall of the telescopic guardrail 40 and its internal air pipe 43. The air pipe 43 is a PVC mesh corrugated pipe.

[0029] Specifically, the telescopic guardrail 40 includes a bracket and a diamond telescopic structure. When the two brackets are close together through the diamond telescopic structure, the air pipe 43 between the two brackets will be stuck in it due to vibration, tilting and other factors, and needs to be manually pushed back inside. Therefore, there is a problem of low retraction efficiency. In the initial state, the contraction of the elastic rope 49 causes the middle of the air pipe 43 between the two supports to move closer to the inside of the telescopic guardrail 40. Furthermore, a ring is provided at the connection between the air pipe 43 and the elastic rope 49 to support the air pipe 43, so as not to interfere with the gas delivery. Therefore, when the telescopic guardrail 40 contracts, the elastic rope 49 always pulls the air pipe 43 closer to the inside of the telescopic guardrail 40, reducing the possibility of the air pipe 43 getting stuck in the telescopic guardrail 40, thereby helping to improve the efficiency of the telescopic guardrail 40 contraction.

[0030] Example 4, please refer to the appendix. Figure 1 Appendix Figure 3 Appendix Figure 5 and attached Figure 8One end of the storage rod 5 is provided with an adjustment component 6. The adjustment component 6 includes an adjustment rod 60 that rotates with one end of the storage rod 5. A connecting rod 62 is fixed between the two adjustment rods 60. A support rod 66 is fixed between the two storage rods 5. A servo motor 63 is provided on the outer wall of the support rod 66. A worm gear 65 is fixed on the output end of the servo motor 63. The tooth end of the worm gear 65 is meshed with a worm wheel 64 fixed on the outer wall of one of the adjustment rods 60. An L-shaped rod 61 is fixed on the outer wall of one of the adjustment rods 60 near the safety door 2. One end of one of the telescopic guardrails 40 is located between the L-shaped rod 61 and the connecting rod 62.

[0031] Specifically, when placing the retracted telescopic guardrail 40 onto the storage rod 5, it is necessary to manually lift and raise the height of the telescopic guardrail 40 before placing it onto the storage rod 5, which is time-consuming and laborious. Therefore, the two storage rods 5 provide support for the support rod 66, which in turn provides support for the servo motor 63. The output of the servo motor 63 drives the worm gear 65 to rotate, which in turn causes the worm wheel 64 to drive the adjusting rod 60 to rotate. With the cooperation of the connecting rod 62, the two adjusting rods 60 rotate synchronously to a position where their ends are lower than the telescopic guardrail 40. At this point, the operator can move the telescopic guardrail 40 to the position of the corresponding two adjusting rods 60. With the cooperation of the arc plate 41, the telescopic guardrail 40 slides onto the storage rod 5 through the inclined adjusting rods 60, thereby helping to improve the efficiency of storing the telescopic guardrail 40. When the test device 1 is moved, there is a problem that the telescopic guardrail 40 may fall due to shaking. Therefore, the servo motor 63 drives the adjusting rod 60 to rotate upward, so that the ends of the two adjusting rods 60 limit the front and rear sides of the telescopic guardrail 40. The two storage rods 5 support the lower side of the telescopic guardrail 40, and the outer wall of the test device 1 and the outer wall of the L-shaped rod 61 limit its left and right sides, thereby avoiding the situation where the telescopic guardrail 40 falls due to shaking. When a test area needs to be enclosed and high-voltage equipment is being discharged, the operator may fail to connect the air pipe 43 between the safety gate 2 and the telescopic guardrail 40, causing the telescopic guardrail 40 to shift and create a gap, posing a safety hazard. Therefore, when the test area is enclosed, the servo motor 63 drives the adjusting rod 60 to rotate upwards, then one end of the telescopic guardrail 40 is fitted against the connecting rod 62. The downward deflection of the adjusting rod 60 causes the L-shaped rod 61 to engage with the end of the telescopic guardrail 40, locking the telescopic guardrail 40 in place. This prevents the telescopic guardrail 40 from shifting when the air pipe 43 between the safety gate 2 and the telescopic guardrail 40 is not connected, thus improving safety during discharge.

[0032] Example 5, please refer to the appendix. Figure 1 Appendix Figure 5 and attached Figure 7 A locking assembly 3 is provided on the upper side of the safety door 2. The locking assembly 3 includes a fixed seat 31 fixed on the upper side of the safety door 2. An electric push rod 30 is provided on one side of the fixed seat 31, and a locking rod 33 slides on the other side of the fixed seat 31. The output end of the electric push rod 30 is fixedly provided on one end of the locking rod 33. Fixed blocks 32 fixed to the outer wall of the test device 1 are rotatably provided on both sides of the safety door 2. The other end of the locking rod 33 slides through both sides of the upper fixed block 32. A sliding groove is provided on the outer wall of the second protective plate 48 to slide with the other end of the locking rod 33. One side of the second protective plate 48 is attached to the outer wall of the test device 1. An iron block 35 is fixed on the other side of the second protective plate 48. An electromagnet 34 is fixed on the outer wall of the test device 1. The lower side of the iron block 35 is attached to and attracted to the upper side of the electromagnet 34.

[0033] Specifically, during the test, the output end of the electric push rod 30 drives the locking rod 33 to slide in the fixed seat 31 and into the interior of the fixed block 32, thereby locking the safety door 2 and avoiding the safety hazard caused by the accidental opening of the safety door 2 during the test. The rotating connection between the second protective plate 48 and the test device 1 allows the second protective plate 48 to be rotated forward when not in use, protecting the display screen, buttons, and other structures of the test device 1, thus achieving multiple protective functions. However, when the second protective plate 48 is rotated upward to achieve the protective function during the experiment, there is a lack of effective support. Therefore, when the second protective plate 48 is rotated to the upper side of the vertical test device 1, the output end of the electric push rod 30 can continue to drive the locking rod 33 through the fixed seat 31 and slide into the slide groove to limit and support the second protective plate 48, so that it can weaken the impact force generated by the explosion during the experiment and achieve the function of protecting personnel. When the second protective plate 48 is rotated upward, there is a problem that the first sliding groove and the locking rod 33 are difficult to align. Therefore, before rotating the second protective plate 48 upward, the electromagnet 34 is energized first, and then the second protective plate 48 is rotated. The iron block 35 on the second protective plate 48 will be attracted and fixed to the electromagnet 34. At this time, the locking rod 33 and the first sliding groove are aligned, thereby improving the efficiency of fixing the second protective plate 48.

[0034] Please see the appendix Figure 1 Appendix Figure 5 and attached Figure 6 The outer wall of the protective shell 44 has a rotating protective plate 47, the outer wall of the protective plate 47 is fixed with a support seat 11, the inner wall of the support seat 11 has a sliding T-shaped rod 10, the outer wall of the protective plate 48 has a fixed card seat 12, and the outer wall of the card seat 12 has a sliding groove 2 that cooperates with one end of the T-shaped rod 10 to slide.

[0035] Specifically, when not conducting a test, the protective plate 47 is used to protect the control interface on the protective shell 44. When conducting a test, the operator can manually move the T-shaped rod 10 so that one end of the T-shaped rod 10 slides into the sliding groove 2 inside the card seat 12, allowing the protective plate 47 and the protective plate 48 to rotate synchronously, increasing the protection range and further improving the safety of the test.

[0036] Workflow: When in use, if the high-voltage equipment is movable, it is directly sent into the test area; if it is inconvenient to move, the test device 1, telescopic guardrail 40, and protective shell 44 are moved to enclose the test area; during this process, the servo motor 63 drives the adjusting rod 60 to rotate, and through the cooperation of the arc plate 41 and the adjusting rod 60, the storage efficiency of the storage rod 5 on the telescopic guardrail 40 is improved. Then the adjusting rod 60 continues to rotate, limiting the telescopic guardrail 40 during its movement. When enclosing the test area, quick connector 9 is used to quickly connect air pipe 43 between telescopic guardrail 40, baffle 45, test device 1, and safety door 2; by rotating the adjusting rod 60, the L-shaped rod 61 limits and locks the end of one telescopic guardrail 40 to prevent it from shifting and causing safety hazards. Then, after operating the high-voltage equipment, move the T-shaped rod 10 into the card seat 12, rotate the second protective plate 48 to the vertical test device 1, and the electromagnet 34 attracts the iron block 35 to complete the positioning; then, start the electric push rod 30, push the locking rod 33 through the fixed block 32, and slide into the first groove of the second protective plate 48 to complete the double locking of the safety door 2 and the second protective plate 48. Next, the controller starts the air curtain self-test, checking the air tightness of air pipe 43 and nozzle 42; if there is an abnormality in the pipeline, an alarm will be triggered and the test will be prohibited; confirm that gas sensor 8, wireless audible and visual alarm light 13, and servo motor 63 are normal. The pressure test is initiated by the test device 1. The gas sensor 8 monitors the harmful gas in real time. When the gas sensor 8 triggers a signal, the controller activates the carbon dioxide fire extinguishing tank. The gas pipe 43 forms an air curtain barrier through the nozzle 42 to block the spread. When a fire breaks out in the test area, the handheld nozzle 46 is aimed at the base of the fire source to extinguish it. When the equipment explodes, the first protective plate 47 and the second protective plate 48 block the splashes, thereby improving the safety of the pressure test of the high-pressure equipment.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety protection device for withstand voltage testing of high-voltage equipment, comprising a testing device (1), characterized in that, The test device (1) has a safety door (2) on one side and a protective device (4) on the other side. The protective device (4) includes a protective shell (44) and a telescopic guardrail (40) fitted to the other side of the test device (1). The test device (1), the protective shell (44), the telescopic guardrail (40) and the safety door (2) are connected in sequence to form a rectangular test area. The protective shell (44) is equipped with a carbon dioxide fire extinguisher and a controller. The outer wall of the protective shell (44) is equipped with a gas pipe (43) with one end connected to the carbon dioxide fire extinguisher. The outer wall of the gas pipe (43) passes through both ends of the telescopic guardrail (40). The outer wall of the telescopic guardrail (40) is fixed with several nozzles (42) installed on the outer wall of the gas pipe (43). The outer wall of the test device (1) is equipped with a gas sensor (8) for detecting harmful gases. The controller is used to receive and process signals from the gas sensor (8) and to control the carbon dioxide fire extinguishing tank to spray carbon dioxide through the gas pipe (43) and nozzle (42) for warning, isolation and fire extinguishing.

2. The safety protection device for withstand voltage testing of high-voltage equipment according to claim 1, characterized in that, The protective shell (44) has a baffle (45) rotating on the side away from the test device (1). The two ends of the telescopic guardrail are respectively attached to the outer walls of the safety door (2) and the baffle (45). The outer wall of the test device (1) is rotatably connected to the second protective plate (48). The upper side of the protective shell (44) is provided with a nozzle (46) connected to the carbon dioxide fire extinguisher. There are three telescopic guardrails (40). The three telescopic guardrails (40) together form an opening rectangle facing the test device (1). The outer wall of the air pipe (43) is provided with multiple quick connectors (9). The multiple quick connectors (9) are used for quick connection and disassembly of the air pipe (43) between the three telescopic guardrails (40), the baffle (45), the test device (1), and the safety door (2). A storage rod (5) is fixed on one side of the test device (1) and is arranged in parallel. An arc plate (41) that slides and matches the storage rod (5) is fixed on the lower side of the telescopic guardrail (40).

3. The safety protection device for withstand voltage testing of high-voltage equipment according to claim 1, characterized in that, Several elastic ropes (49) are fixed between the inner wall of the telescopic guardrail (40) and its internal air pipe (43), and the air pipe (43) is a PVC mesh corrugated pipe.

4. A safety protection device for withstand voltage testing of high-voltage equipment according to claim 2, characterized in that, One end of the storage rod (5) is provided with an adjustment component (6), the adjustment component (6) includes an adjustment rod (60) that rotates with one end of the storage rod (5), and a connecting rod (62) is fixed between the two adjustment rods (60).

5. A safety protection device for withstand voltage testing of high-voltage equipment according to claim 4, characterized in that, A support rod (66) is fixed between the two storage rods (5). A servo motor (63) is provided on the outer wall of the support rod (66). A worm gear (65) is fixed on the output end of the servo motor (63). The tooth end of the worm gear (65) is meshed with a worm wheel (64) fixed on the outer wall of one of the adjusting rods (60).

6. A safety protection device for withstand voltage testing of high-voltage equipment according to claim 5, characterized in that, An L-shaped rod (61) is fixed to the outer wall of an adjusting rod (60) near the safety door (2), and one end of one of the telescopic guardrails (40) is located between the L-shaped rod (61) and the connecting rod (62).

7. A safety protection device for withstand voltage testing of high-voltage equipment according to claim 6, characterized in that, The safety door (2) is provided with a locking component (3) on its upper side. The locking component (3) includes a fixed seat (31) fixed on the upper side of the safety door (2). An electric push rod (30) is provided on one side of the fixed seat (31). A locking rod (33) slides on the other side of the fixed seat (31). The output end of the electric push rod (30) is fixedly provided at one end of the locking rod (33). Fixed blocks (32) fixed on the outer wall of the test device (1) are rotatably provided on both sides of the safety door (2). The other end of the locking rod (33) slides through both sides of the upper fixed block (32).

8. A safety protection device for withstand voltage testing of high-voltage equipment according to claim 2, characterized in that, The outer wall of the second protective plate (48) is provided with a sliding groove that slides in conjunction with the other end of the locking rod (33). One side of the second protective plate (48) is attached to the outer wall of the test device (1), and an iron block (35) is fixed on the other side of the second protective plate (48).

9. A safety protection device for withstand voltage testing of high-voltage equipment according to claim 8, characterized in that, An electromagnet (34) is fixed to the outer wall of the test device (1), and the lower side of the iron block (35) is attached to and adsorbed on the upper side of the electromagnet (34).

10. A safety protection device for withstand voltage testing of high-voltage equipment according to claim 2, characterized in that, The outer wall of the protective shell (44) is rotatably equipped with a protective plate (47), the outer wall of the protective plate (47) is fixed with a support seat (11), the inner wall of the support seat (11) is slidably equipped with a T-shaped rod (10), the outer wall of the protective plate (48) is fixed with a card seat (12), and the outer wall of the card seat (12) is provided with a groove 2 that cooperates with one end of the T-shaped rod (10) to slide.

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