A safety protection device for maintenance of electrical equipment in power plants

Abstract

The invention discloses a safety protection device for maintenance of electrical equipment in a power plant, comprising a guard arm, a baffle assembly, a first blasting unit and a trigger unit; the baffle assembly comprises a movable baffle, the front end of which is hinged to the front end of the guard arm; a blasting groove is arranged at the rear end of the guard arm, and the first blasting unit is installed in the blasting groove; a through hole is arranged at the rear end of the guard arm along the length direction of the guard arm, a movable shaft and a spring are arranged in the through hole, the spring is sleeved on the movable shaft, a buckle tongue is arranged at the end of the movable shaft, the movable baffle is tightly attached to the guard arm and the rear end of the movable baffle is buckled by the buckle tongue; the safety protection device of the invention is provided with a movable baffle assembly on the guard arm, the movable baffle is folded during normal operation, the whole device is small in size, and normal maintenance work is not affected; when a dangerous situation occurs, the movable baffle is quickly unfolded to form a protective barrier in front of the arm of the maintenance worker, so that the safety protection device has the dual advantages of strong protection ability and easy use.

Description

Technical Field

[0001] The invention relates to the field of protective equipment, and in particular to a safety protection device for repairing electrical equipment in a power plant. Background Art

[0002] There are a large number of electrical equipment in the power plant. These electrical equipment often need to face certain dangerous operations such as live work during the maintenance process. These certain dangerous operations may cause dangerous situations such as leakage, arc flash and explosion. In order to protect the safety of maintenance workers, it is necessary to configure safety protection devices for workers when performing electrical equipment maintenance. The commonly used installation protection devices in the prior art are insulating gloves and protective clothing. Insulating gloves have the advantages of flexibility and convenience, but they are difficult to deal with arcs and explosions. Protective clothing has stronger protective capabilities, but protective clothing is very bulky and inconvenient to wear protective clothing. Summary of the invention

[0003] The technical problem to be solved by the present invention is that it is difficult for the insulating gloves and protective clothing in the prior art to have both strong protective ability and convenient use when dealing with electrical equipment maintenance operations.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a safety protection device for maintenance of electrical equipment in a power plant, comprising a guard arm, a baffle assembly, a first blasting unit and a trigger unit;

[0005] The baffle assembly includes a movable baffle, the front end of which is hinged to the front end of the guard arm and a torsion spring is arranged at the hinge; the rear end of the guard arm is provided with a blasting groove, and the first blasting unit is installed in the blasting groove; the rear end of the guard arm is provided with a through hole along the length direction of the guard arm, the through hole is connected with the blasting groove, a moving shaft and a spring are arranged in the through hole, the spring is sleeved on the moving shaft, a buckle tongue is arranged at the end of the moving shaft, the spring pushes the moving shaft so that the buckle tongue is close to the rear end of the guard arm, the movable baffle is close to the guard arm and the rear end of the movable baffle is buckled by the buckle tongue, and the movable baffle covers the first blasting unit;

[0006] The trigger unit is used to trigger the first blasting unit. The arm guard in the present invention needs to be equipped with a strap or other fixing structure. The safety protection device needs to fix the arm guard on the forearm of the maintenance worker when in use. When the trigger unit detects a dangerous situation on the scene, the first blasting unit explodes immediately, and a large amount of high-pressure gas is generated instantly. The high-pressure gas enters the through hole from the blasting groove, pushing the moving shaft to translate, so that the buckle tongue is separated from the movable baffle, and the movable baffle is unlocked; then, the movable baffle is quickly ejected under the joint action of the torsion spring and the high-pressure gas, and unfolds in front of the maintenance worker's arm to form a protective barrier.

[0007] Specifically, the trigger unit includes a pressure sensor, which is installed on the inside of the arm guard; when a dangerous situation occurs, the muscles on the person's arm will immediately tense up to trigger the pressure sensor, and the pressure sensor triggers the first blasting unit through a corresponding control circuit. Chemical substances such as sodium azide or ammonium nitrate are stored in the first blasting unit, and the trigger unit is equipped with a resistance wire and a corresponding circuit, and the resistance wire is inserted into the sodium azide or ammonium nitrate; the trigger unit instantly generates high temperature through the resistance wire to activate the sodium azide or ammonium nitrate, thereby instantly generating a large amount of high-pressure gas.

[0008] In order to form a fan-shaped protective barrier on the arm of the maintenance worker when a danger occurs, there are multiple baffle assemblies, and the multiple baffle assemblies are distributed around the guard arm. When a danger occurs, all the movable baffles are simultaneously unfolded; there will be gaps between the unfolded movable baffles. In order to overcome this problem, the baffle assembly also includes a spreader, a locking column and a pull rope. Receiving grooves are provided on both sides of the movable baffle, and the spreader is located in the receiving groove. The locking column is magnetically adsorbed on both sides of the movable baffle, the locking column blocks the receiving groove, and the pull rope connects the locking columns of adjacent baffle assemblies; when the movable baffle is unfolded, the adjacent locking columns cannot be separated due to the action of the pull rope, so the locking column will be separated from the edge of the movable baffle, and then the spreader hidden in the receiving groove will be pulled out, so that the movable baffle and the spreader together form a complete fan-shaped barrier.

[0009] Furthermore, an elastic locking hook for locking the movable baffle is provided at the front end of the guard arm. When the movable baffle is unfolded, the front end of the movable baffle is hooked by the elastic locking hook to ensure that the movable baffle remains stably in the unfolded state.

[0010] Furthermore, the safety protection device also includes a reverse thrust device and a reverse thrust column; the front end of the guard arm is provided with a reverse thrust channel along the length direction of the guard arm, and the reverse thrust column is inserted in the reverse thrust channel; the reverse thrust device includes a reverse thrust tube and a second blasting unit, the reverse thrust tube is fixed on the reverse thrust channel and the reverse thrust tube and the reverse thrust channel are connected through a groove, and a convex column is provided at one end of the reverse thrust column, and the convex column is inserted into the reverse thrust tube; the second blasting unit is located in the reverse thrust tube; when a danger occurs, the trigger unit will also synchronously trigger the second blasting unit, and the high-pressure gas generated by the second blasting unit pushes the convex column of the reverse thrust column, so that the reverse thrust column is quickly pushed forward. During the pushing process, the reverse thrust column is likely to touch the equipment that the maintenance worker is repairing, thereby enabling the maintenance worker's arm to obtain reverse thrust, helping the maintenance worker to quickly retract his arm and stay away from danger.

[0011] Specifically, the reverse thrust device also includes a base and a locking plate. The base is fixed to the end of the reverse thrust tube. A locking groove is provided on the base. The locking plate is inserted into the locking groove to close the end of the reverse thrust tube. A new second blasting unit can be placed in the reverse thrust tube by pulling out the locking plate.

[0012] Furthermore, the safety protection device also includes a conductive column, the front end of the guard arm is provided with a conductive channel along the length direction of the guard arm, and the conductive column is located in the conductive channel; each conductive column is equipped with a reverse thruster, and the reverse thruster is used to push the conductive column out, and the principle of the reverse thruster pushing out the conductive column is consistent with the principle of the reverse thruster pushing out the reverse thrust column. The conductive column is made of a conductive metal material, and the function of the conductive column is to attract various arcs generated during electrical maintenance work.

[0013] Furthermore, a fire extinguishing channel is provided at the front end of the guard arm along the length direction of the guard arm, and a fire extinguishing agent is provided in the fire extinguishing channel. The end of the fire extinguishing channel is blocked by a third blasting unit. When a danger occurs, the trigger unit will also synchronously trigger the third blasting unit. After the third blasting unit ruptures, the fire extinguishing agent in the fire extinguishing channel will be sprayed out, so as to extinguish the fire and reduce the disaster, and avoid the explosion and open flame from causing harm to the workers.

[0014] Furthermore, the safety protection device also includes gloves and ground wires. The gloves are insulating gloves, and the surface of the gloves is provided with a conductive layer, and the conductive layer is connected to the arm guard through a wire; the arm guard is grounded through the ground wire; when dangerous conditions such as leakage occur during the maintenance of electrical equipment, the gloves, arm guards and ground wires can promptly drain the leakage to the ground to reduce the harm. When the gloves and ground wires are configured, the trigger unit can also trigger the first blasting unit, the second blasting unit and the third blasting unit according to the current size on the arm guard.

[0015] Beneficial effects: (1) The safety protection device of the present invention is provided with a movable baffle assembly on the guard arm. During normal operation, the movable baffle is folded, and the entire device is small in size and does not affect normal maintenance work. When a dangerous situation occurs, the movable baffle is quickly deployed to form a protective barrier in front of the maintenance worker's arm, so that the safety protection device has the dual advantages of strong protection ability and easy use. (2) The safety protection device of the present invention is provided with a deployment cloth in the receiving grooves on both sides of the movable baffle. After the movable baffle is deployed, the gap between adjacent movable baffles is filled with the deployment cloth, thereby improving the safety protection effect. (3) The safety protection device of the present invention is provided with a reverse thrust column and a conductive column at the front end of the guard wall. In the event of danger, it assists in pushing away the maintenance worker and timely guides the leakage current, thereby improving the protection ability. (4) The safety protection device of the present invention is equipped with insulating gloves with a conductive layer to timely drain the leakage current to the ground to avoid electric shock injuries during the maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the safety protection device of Example 1.

[0017] Figure 2 It is a stereoscopic view of the safety protection device of Example 1 (from another perspective).

[0018] Figure 3It is a stereoscopic view of the baffle assembly in Example 1.

[0019] Figure 4 It is the front view of the safety protection device of Example 1 (partial baffle assembly is hidden).

[0020] Figure 5 yes Figure 4 Another state (the movable baffle is folded).

[0021] Figure 6 It is a stereoscopic diagram of the guard arm and the thrust reverser in Example 1.

[0022] Figure 7 It is a cross-sectional view of the guard arm in Example 1 (cut-through blasting groove).

[0023] Figure 8 yes Figure 7 A enlarged view of .

[0024] Fig. 9 It is a cross-sectional view of the guard arm and the thrust reverser in Example 1 (cut-away thrust reverser).

[0025] Fig.10 yes Fig. 9 B is an enlarged view of .

[0026] Fig.11 yes Fig. 9 The state diagram after the middle thrust column is pushed out.

[0027] Among them: 100, arm guard; 110, blasting groove; 120, moving axis; 121, buckle tongue; 130, spring; 140, elastic locking hook; 150, reverse thrust channel; 160, third blasting unit; 200, baffle assembly; 210, movable baffle; 211, accommodating groove; 220, spreading; 230, locking column; 240, pull rope; 300, first blasting unit; 400, trigger unit; 500, reverse thrust; 510, reverse thrust cylinder; 520, second blasting unit; 530, base; 540, locking plate; 600, reverse thrust column; 610, convex column; 700, conductive column; 800, gloves; 900, ground wire. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with specific implementation modes.

[0029] Example 1

[0030] like Figure 1 and Figure 2 As shown, the safety protection device for maintenance of electrical equipment in a power plant of this embodiment includes a guard arm 100, a baffle assembly 200, a first blasting unit 300, a trigger unit 400, a reverse thruster 500, a reverse thrust column 600, a conductive column 700, a glove 800 and a ground wire 900.

[0031] like Figure 3 As shown, the baffle assembly 200 includes a movable baffle 210, a spread 220, a locking column 230 and a pull rope 240. The movable baffle 210 is provided with a receiving groove 211 on both sides. The spread 220 is located in the receiving groove 211. The locking column 230 is magnetically adsorbed on both sides of the movable baffle 210. The locking column 230 blocks the receiving groove 211. The pull rope 240 connects the locking columns 230 of adjacent baffle assemblies 200. Figure 1 As shown, the front end of the movable baffle 210 is hinged to the front end of the guard arm 100 and a torsion spring is provided at the hinge. Figures 6 to 8 As shown, the rear end of the arm guard 100 is provided with a blasting groove 110, and the first blasting unit 300 is installed in the blasting groove 110; the rear end of the arm guard 100 is provided with a through hole along the length direction of the arm guard 100, the through hole is connected with the blasting groove 110, and a moving shaft 120 and a spring 130 are provided in the through hole, the spring 130 is sleeved on the moving shaft 120, and a buckle tongue 121 is provided at the end of the moving shaft 120, and the spring 130 pushes the moving shaft 120 so that the buckle tongue 121 is close to the rear end of the arm guard 100. Figure 5 As shown, in normal operation, the movable baffle 210 is close to the guard arm 100 and the rear end of the movable baffle 210 is buckled by the buckle tongue 121. When a dangerous situation occurs, such as Figure 8 The first blasting unit 300 in the blasting slot 110 shown explodes to generate a large amount of high-pressure gas, which enters the through hole from the blasting slot 110 and pushes the moving shaft 120 to translate, so that Figure 5 The buckle tongue 121 in the movable baffle 210 is translated to the left and separated from the movable baffle 210, thereby releasing the lock of the movable baffle 210; then, the movable baffle 210 is released under the combined action of the torsion spring and the high-pressure gas. Figure 4 As shown, it pops up quickly and unfolds in front of the maintenance worker's arm to form a Figure 1 and Figure 2 Protective barrier shown. Figure 3 The state shown is after the movable baffle 210 is unfolded. When the movable baffle 210 is unfolded, the adjacent locking posts 230 cannot be separated due to the action of the pull rope 240, so the locking posts 230 will separate from the edge of the movable baffle 210, and then the spread 220 hidden in the receiving groove 211 will be pulled out, so that the movable baffle 210 and the spread 220 together form a complete fan-shaped barrier. Figure 6 As shown, the front end of the guard arm 100 is provided with an elastic locking hook 140 for locking the movable baffle 210. When the movable baffle 210 is unfolded, the front end of the movable baffle 210 is hooked by the elastic locking hook 140 to ensure that the movable baffle 210 remains in the unfolded state stably.

[0032] like Figure 6 As shown, a plurality of reverse thrusters 500 are arranged at the front end of the guard arm 100; Fig. 9 and Fig.10 As shown, the front end of the guard arm 100 is provided with a reverse thrust channel 150 along the length direction of the guard arm 100, and the reverse thrust column 600 is inserted in the reverse thrust channel 150; the reverse thrust device 500 includes a reverse thrust tube 510, a second blasting unit 520, a base 530 and a locking plate 540, the reverse thrust tube 510 is fixed on the reverse thrust channel 150 and the reverse thrust tube 510 and the reverse thrust channel 150 are connected through a groove, the base 530 is fixed to the end of the reverse thrust tube 510, and a locking groove is provided on the base 530, and the locking plate 540 is inserted in the locking groove to close the end of the reverse thrust tube 510; the locking plate 540 can be pulled out to place a new second blasting unit 520 in the reverse thrust tube 510. One end of the reverse thrust column 600 is provided with a protruding column 610, which is inserted into the reverse thrust tube 510; the second blasting unit 520 is located in the reverse thrust tube 510; when a danger occurs, the trigger unit 400 will also synchronously trigger the second blasting unit 520, and the high-pressure gas generated by the second blasting unit 520 pushes the protruding column 610 of the reverse thrust column 600, so that the reverse thrust column 600 is as follows Fig.11 As shown in the figure, the reverse thrust column 600 is pushed forward quickly. During the pushing process, the reverse thrust column 600 is likely to touch the equipment that the maintenance worker is repairing, so that the arm of the maintenance worker obtains reverse thrust, helping the maintenance worker to quickly withdraw his arm and stay away from danger. In order to increase the contact area between the reverse thrust column 600 and the maintenance equipment and better realize reverse thrust, the embodiment also sets a crossbeam at the exposed end of the reverse thrust column 600.

[0033] like Figure 6 As shown, the front end of the arm 100 is provided with a conductive channel along the length direction of the arm 100, and the conductive column 700 is located in the conductive channel; each conductive column 700 is equipped with a reverse thruster 500, and the reverse thruster 500 is used to push the conductive column 700 out. The principle of the reverse thruster 500 pushing the conductive column 700 is consistent with the principle of the reverse thruster 500 pushing the reverse thrust column 600. The conductive column 700 is made of a conductive metal material, and the function of the conductive column 700 is to attract various arcs generated during electrical maintenance work.

[0034] like Figure 6 As shown, the front end of the guard arm 100 is provided with a fire extinguishing channel along the length direction of the guard arm 100, and a fire extinguishing agent is arranged in the fire extinguishing channel. The end of the fire extinguishing channel is blocked by the third blasting unit 160; when a danger occurs, the trigger unit 400 will also synchronously trigger the third blasting unit 160. After the third blasting unit 160 ruptures, the fire extinguishing agent in the fire extinguishing channel is sprayed out, so as to extinguish the fire and reduce the disaster, and avoid the explosion and open flame from causing harm to the workers.

[0035] The glove 800 is an insulating glove 800, and a conductive layer is provided on the surface of the glove 800, and the conductive layer is connected to the arm guard 100 through a wire; the arm guard 100 is grounded through a ground wire 900; when dangerous conditions such as leakage occur during the maintenance of electrical equipment, the glove 800, the arm guard 100 and the ground wire 900 can drain the leakage to the ground in time to reduce the harm.

[0036] The first blasting unit 300, the second blasting unit 520 and the third blasting unit 160 of this embodiment all use sodium azide or ammonium nitrate as blasting agents. The trigger unit 400 includes a sensor, a control circuit and a resistance wire, the resistance wire is in contact with the blasting agent, and the sensor uses a pressure sensor built into the inner side of the arm guard 100 or a current sensor connected to the ground wire 900. When the data of the sensor reaches a set value, the control circuit starts the resistance wire to detonate the blasting agent. The trigger unit 400 is used to simultaneously trigger all the first blasting units 300, the second blasting unit 520 and the third blasting unit 160 of this embodiment.

[0037] The method of using the safety protection device of this embodiment is that the maintenance worker uses a strap to fix the arm guard 100 on his forearm, and then wears the glove 800 to perform maintenance work; when performing normal maintenance work, the movable baffle 210 is as follows: Figure 5 As shown, the rear end of the movable baffle 210 is fastened to the guard arm 100 and is fastened by the buckle tongue 121. The whole device is small and flexible and will hardly interfere with the maintenance work of the maintenance worker. Once a dangerous situation such as explosion or leakage occurs during the maintenance work, the trigger unit 400 immediately triggers all the first blasting units 300, the second blasting unit 520 and the third blasting unit 160, and the safety protection device will make the following four reactions: (1) The movable baffle 210 is released under the combined action of the torsion spring and the high-pressure gas. Figure 4 As shown, it pops up quickly and unfolds in front of the maintenance worker's arm to form a Figure 1 and Figure 2 The protective barrier shown; (2) the reverse thrust column 600 as shown Fig.11 As shown in the figure, the reverse thrust column 600 is pushed forward quickly. During the pushing process, it is very likely that the reverse thrust column 600 will touch the equipment that the maintenance worker is repairing, thereby causing the maintenance worker's arm to obtain reverse thrust, helping the maintenance worker to quickly retract his arm; (3) as shown in the figure Figure 6 The conductive column 700 shown is quickly pushed out to attract the arc; (4) Figure 6 The explosion of the third blasting unit 160 causes the fire extinguishing agent in the fire extinguishing passage to spray out, thereby reducing the open flame near the maintenance worker's arm.

[0038] It can be seen that the safety protection device of this embodiment can instantly make four responses when a dangerous situation occurs during the maintenance of electrical equipment in a power plant, which greatly ensures the personal safety of maintenance personnel.

[0039] Although the embodiments of the present invention are described in the specification, these embodiments are only for reference and should not limit the protection scope of the present invention. Various omissions, substitutions and changes within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A safety protection device for maintenance of electrical equipment in a power plant, characterized in that: The invention comprises a guard arm (100), a baffle assembly (200), a first blasting unit (300) and a trigger unit (400); the baffle assembly (200) comprises a movable baffle (210), the front end of the movable baffle (210) is hinged to the front end of the guard arm (100) and a torsion spring is arranged at the hinge; the rear end of the guard arm (100) is provided with a blasting groove (110), and the first blasting unit (300) is installed in the blasting groove (110); the rear end of the guard arm (100) is provided along the guard arm ( A through hole extending in the longitudinal direction of the guard arm (100), the through hole being connected to the blasting groove (110), a movable shaft (120) and a spring (130) being arranged in the through hole, the spring (130) being sleeved on the movable shaft (120), a buckle tongue (121) being arranged at the end of the movable shaft (120), the spring (130) pushing the movable shaft (120) so that the buckle tongue (121) is close to the rear end of the guard arm (100), the movable baffle (210) is close to the guard arm (100) and the rear end of the movable baffle (210) is buckled by the buckle tongue (121); The trigger unit (400) is used to trigger the first blasting unit (300).

2. The safety protection device for maintenance of electrical equipment in a power plant according to claim 1 is characterized in that: The trigger unit (400) comprises a pressure sensor, which is installed inside the arm guard (100).

3. The safety protection device for maintenance of electrical equipment in a power plant according to claim 1, characterized in that: The number of the baffle assemblies (200) is multiple, and the multiple baffle assemblies (200) are distributed around the guard arm (100); The baffle assembly (200) further comprises a spreader (220), a locking column (230) and a drawstring (240); a receiving groove (211) is arranged on both sides of the movable baffle (210); the spreader (220) is located in the receiving groove (211); the locking column (230) is magnetically adsorbed on both sides of the movable baffle (210); the locking column (230) blocks the receiving groove (211); and the drawstring (240) connects the locking columns (230) of adjacent baffle assemblies (200).

4. The safety protection device for maintenance of electrical equipment in a power plant according to claim 1, characterized in that: The front end of the guard arm (100) is provided with an elastic locking hook (140) for locking the movable baffle (210).

5. The safety protection device for maintenance of electrical equipment in a power plant according to claim 1, characterized in that: Also includes a thrust reverser (500) and a thrust reverser column (600); The front end of the guard arm (100) is provided with a reverse thrust channel (150) along the length direction of the guard arm (100), and the reverse thrust column (600) is inserted into the reverse thrust channel (150); The thrust reverser (500) comprises a thrust reverser tube (510) and a second blasting unit (520). The thrust reverser tube (510) is fixed on the thrust reverser channel (150) and the thrust reverser tube (510) and the thrust reverser channel (150) are connected via a slot. A convex column (610) is provided at one end of the thrust reverser column (600), and the convex column (610) is inserted into the thrust reverser tube (510). The second blasting unit (520) is located in the thrust reverser tube (510).

6. The safety protection device for maintenance of electrical equipment in a power plant according to claim 5, characterized in that: The thrust reverser (500) further comprises a base (530) and a locking plate (540), wherein the base (530) is fixed to the end of the thrust reverser cylinder (510), a locking groove is provided on the base (530), and the locking plate (540) is inserted into the locking groove to close the end of the thrust reverser cylinder (510).

7. The safety protection device for maintenance of electrical equipment in a power plant according to claim 6, characterized in that: It also includes a conductive column (700), wherein the front end of the guard arm (100) is provided with a conductive channel along the length direction of the guard arm (100), and the conductive column (700) is located in the conductive channel; each conductive column (700) is configured with a reverse thruster (500), and the reverse thruster (500) is used to push the conductive column (700) out.

8. The safety protection device for maintenance of electrical equipment in a power plant according to claim 7, characterized in that: The front end of the guard arm (100) is provided with a fire extinguishing channel along the length direction of the guard arm (100), a fire extinguishing agent is arranged in the fire extinguishing channel, and the end of the fire extinguishing channel is blocked by a third blasting unit (160).

9. The safety protection device for maintenance of electrical equipment in a power plant according to claim 8, characterized in that: It also includes a glove (800) and a ground wire (900), wherein the glove (800) is an insulating glove (800), a conductive layer is provided on the surface of the glove (800), and the conductive layer is connected to the arm guard (100) via a wire; and the arm guard (100) is grounded via the ground wire (900).

10. The safety protection device for maintenance of electrical equipment in a power plant according to claim 9, characterized in that: The trigger unit (400) triggers the first blasting unit (300) according to the current on the guard arm (100).

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