Safety auxiliary device for electrical overhaul of thermal power plant

Abstract

The invention discloses a safety auxiliary device for electrical overhaul of a thermal power plant, and relates to the technical field of electrical overhaul. According to the thermal power plant electrical overhaul safety auxiliary device, through the arrangement of the self-locking sealing unit, the sealing outer shell and the storage shell can be rapidly connected and sealed, self-locking can be achieved, when the sealing outer shell and the storage shell need to be separated, only a push rod in the sealing outer shell needs to be pulled, and through the arrangement of the downward-breaking abutting unit, the sealing outer shell and the storage shell can be separated. According to the auxiliary measurement and control device, the hollow insertion column can be conveniently fixed through one-way rotation, then the auxiliary measurement and control device body can be rapidly assembled and fixed, the disassembly convenience is high, meanwhile, in the fixing process, sealing between the hollow insertion column and the insertion hole can be enhanced, external water is prevented from entering the maintenance shell, and the maintenance efficiency is improved. The whole process can be achieved only by pushing the driving breaking-off shaft, sealing and fixing combination of the auxiliary measurement and control device body are achieved synchronously, and operation convenience is high.

Description

Technical Field

[0001] The invention relates to the technical field of electrical maintenance, in particular to a safety auxiliary device for electrical maintenance of a thermal power plant. Background Art

[0002] At present, nearly 70% of my country's electricity still comes from thermal power plants. Ensuring the safety of all aspects of power production in thermal power plants is the prerequisite for achieving sufficient and timely power supply. With the current capacity increase and consumption reduction of units, electrical equipment has become more and more, and fault monitoring and processing have become more difficult. The maintenance of equipment urgently needs to be optimized and strengthened in order to avoid or minimize the loss and loss in this regard, fundamentally improve the availability and reliability of electrical equipment, and meet people's demand for electrical equipment. A thermal power plant, referred to as a thermal power plant, is a factory that uses combustibles as fuel to produce electricity. The wires and circuits laid in the thermal power plant are generally subject to strict maintenance to prevent the high-voltage wires from being damaged and causing safety hazards. When inspecting the high-voltage wires, it is necessary to first check whether the wires or items are energized. Generally, an auxiliary measurement and control device is required for maintenance. The existing auxiliary measurement and control device is generally installed on a maintenance housing. When installing with the maintenance housing, sometimes a mounting hole is reserved, but generally bolts are used for fixed installation, which is troublesome to install and has low operating efficiency. When assembling the housing of the measurement and control device, bolts are also mostly used for assembly. When inspecting its internal components, it is necessary to use tools such as screwdrivers to disassemble and assemble the entire device, and the operation convenience is poor. Therefore, the present invention proposes a thermal power plant electrical maintenance safety auxiliary device to solve the above-mentioned problems. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a safety auxiliary device for electrical maintenance of a thermal power plant, which solves the problems mentioned in the above background technology.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: an electrical maintenance safety auxiliary device for a thermal power plant, comprising an auxiliary measurement and control device body arranged in front of an inspection shell, the auxiliary measurement and control device body comprising a storage shell and a sealed shell, a measurement and control display screen is arranged on the sealed shell, a self-locking sealing unit is arranged between the storage shell and the sealed shell, the self-locking sealing unit is used to achieve locking and sealing between the storage shell and the sealed shell, a hollow plug is arranged at the rear of the storage shell, a socket for use with the hollow plug is penetrated through the inspection shell, a protective sleeve is fixed at the rear of the sealed shell, the protective sleeve is located on the outside of the hollow plug, a lower bending and tightening unit is arranged between the hollow plug and the inspection shell, the lower bending and tightening unit is used to stably fix the hollow plug in the socket, and at the same time to improve the sealing between the hollow plug and the socket.

[0005] Preferably, the self-locking sealing unit includes two abutment boxes fixed on the storage shell and the sealing shell, and the two abutment boxes are provided with a folding strip on one side where they are bonded to each other, and semicircular strips are provided at the ends of the two folding strips, and semicircular blocks are rotatably installed on the inner walls of the two semicircular strips, and the two semicircular blocks are spliced ​​with each other, and push rods are fixed to the outer peripheries of the two semicircular blocks, and tension springs are fixed between adjacent push rods and the abutment boxes, and arc grooves matched with the push rods are provided on the surfaces of the semicircular strips, and strip grooves matched with the push rods are provided on the outer sides of the abutment boxes, a rear bonding sealing strip is fixed to the outer periphery of the storage shell, and a front bonding sealing strip used in conjunction with the rear bonding sealing strip is fixed to the outer periphery of the sealing shell.

[0006] Preferably, the lower bending and tightening unit includes a rotating rod rotatably installed at the center of the inner wall of the hollow plug column, the surface of the rotating rod is fixed with a disk body, the surface of the disk body is fixed with three equidistant arc-shaped push blocks, the surface of the hollow plug column is slidably installed with three equidistantly distributed tightening rods, the end of the tightening rod is fixed with a friction pad, the surface of the tightening rod is fixed with an inner magnetic ring, the inner wall of the hollow plug column is fixed with an outer magnetic ring used in conjunction with the inner magnetic ring, the inner wall of the hollow plug column is fixed with a self-locking hollow disk through a support rod, the rotating rod passes through and rotates the self-locking hollow disk, the surface of the rotating rod is fixed with a locking ratchet, the surface of the self-locking hollow disk is slidably penetrated with locking teeth used in conjunction with the locking ratchet, a locking spring is fixed between the locking teeth and the self-locking hollow disk, a transmission rope is fixed to the outside of the locking tooth, a buckle is fixed to the end of the transmission rope, and a driving bending shaft is fixed to the surface of the rotating rod.

[0007] Preferably, a ring body is fixed on the surface of the hollow plug, a front sealing ring is fixed to the rear of the ring body, a rear sealing ring used in conjunction with the front sealing ring is fixed to the front of the inspection shell, an annular fitting groove is provided at the rear of the front sealing ring, an embedded ring used in conjunction with the annular fitting groove is provided in front of the rear sealing ring, the front sealing ring is hollow in design, and an air blowing unit is provided between the driving bend shaft and the hollow plug, and the air blowing unit is used to automatically input air into the front sealing ring to cause it to deform when the driving bend shaft is pressed down and fixed.

[0008] Preferably, the inflation unit includes an inflation cylinder fixed on the surface of a hollow plug, an inflation piston is movably mounted on the inner wall of the inflation cylinder, a spring block is fixed inside the inflation cylinder, a return spring is fixed between the spring block and the inflation piston, an extrusion rod is fixed to the rear of the inflation piston, the inflation cylinder is connected to the front sealing ring through a conduit, a curved block used in conjunction with the extrusion rod is slidably mounted on the surface of the hollow plug, an arc-shaped slide groove used in conjunction with the curved block is provided on the surface of the hollow plug, and the curved block is fixed to the driving bend shaft by a connecting rod.

[0009] Preferably, an inner opening groove for use with the driving shaft is formed on the surface of the hollow plug, and an outer opening groove for use with the driving shaft is formed on the surface of the protective sleeve.

[0010] Preferably, the end of the locking tooth that contacts the locking ratchet is designed to be in a slope shape, so as to limit the locking ratchet to rotate in only one direction.

[0011] Preferably, the annular fitting groove is designed to be narrow inside and wide outside, the embedded ring is integrally formed with the rear sealing ring, and the outer contour of the embedded ring is a truncated cone shape, which is used in fit with the annular fitting groove.

[0012] Beneficial Effects The present invention provides a safety auxiliary device for electrical maintenance of thermal power plants. Compared with the prior art, it has the following beneficial effects: The electrical maintenance safety auxiliary device of the thermal power plant is convenient for quickly connecting and sealing the sealing shell and the storage shell through the setting of the self-locking sealing unit, and can achieve self-locking. When the sealing shell and the storage shell need to be separated, it can be achieved by simply bending the push rod therein. Through the setting of the lower bending and tightening unit, it is convenient to fix the hollow plug column through one-way rotation, thereby realizing rapid assembly and fixation of the auxiliary measurement and control device body, and the disassembly is easy. At the same time, during the fixing process, the seal between the hollow plug column and the socket can be strengthened to prevent external moisture from entering the inside of the maintenance shell. The whole process can be achieved by pushing the driving bending shaft, and the fixing combination of the seal and the auxiliary measurement and control device body is realized simultaneously, and the operation is easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the disassembly of the protective cover of the present invention; Figure 3 This is a schematic diagram of the external structure of the hollow plug column of the present invention; Figure 4 This is a schematic diagram of the structure of the front sealing ring of the present invention; Figure 5 It is a side view of the structure of the inflator of the present invention; Figure 6 This is a schematic diagram of the internal structure of the hollow plug column of the present invention; Figure 7 For the present invention Figure 3 A partial enlarged view of the middle A; Figure 8 This is a front view of the internal structure of the self-locking hollow disk of the present invention; Fig. 9 It is a three-dimensional diagram of two abutment boxes spliced ​​together according to the present invention; Fig.10 It is a top sectional view of two abutment boxes spliced ​​together according to the present invention.

[0014] In the figure: 1-inspection shell, 2-storage shell, 3-sealed shell, 4-measurement and control display screen, 5-self-locking sealing unit, 51-abutment box, 52-folding strip, 53-semicircular strip, 54-semicircular block, 55-push rod, 56-tension spring, 57-arc groove, 58-bar groove, 59-rear laminating sealing strip, 510-front laminating sealing strip, 6-hollow plug column, 7-plug hole, 8-protective sleeve, 9-lower bending and tightening unit, 91-rotating rod, 92-arc push block, 93-tightening rod, 94-friction pad, 95-inner magnetic ring, 96-outer magnetic ring, 97-support rod, 98-self-locking hollow Disk, 99-locking ratchet, 910-locking tooth, 911-locking spring, 912-transmission rope, 913-buckle, 914-driving shaft, 915-ring body, 916-front sealing ring, 917-rear sealing ring, 918-annular fitting groove, 919-embedded ring, 920-disk body, 10-inflating unit, 101-inflating cylinder, 102-inflating piston, 103-spring block, 104-reset spring, 105-extrusion rod, 106-conduit, 107-curved block, 108-arc slide groove, 109-connecting rod, 11-inner opening groove, 12-outer opening groove. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-Figure 10The present invention provides a technical solution: an electrical maintenance safety auxiliary device for a thermal power plant, comprising an auxiliary measurement and control device body arranged in front of a maintenance housing 1, the auxiliary measurement and control device body comprising a storage shell 2 and a sealed housing 3, the storage shell 2 is provided with a measurement and control chip and other components, which are not shown in the accompanying drawings, and are prior art here, the storage shell 2 and the sealed housing 3 can fit each other, a measurement and control display screen 4 is provided on the sealed housing 3, a self-locking sealing unit 5 is provided between the storage shell 2 and the sealed housing 3, the self-locking sealing unit 5 is used to achieve locking and sealing between the storage shell 2 and the sealed housing 3, and facilitate the sealing of the sealed housing 3 is disassembled, so as to facilitate the replacement and maintenance of the internal components of the storage shell 2. A hollow plug post 6 is arranged at the rear of the storage shell 2. A plug hole 7 used in conjunction with the hollow plug post 6 is penetrated and opened on the maintenance shell 1. A protective sleeve 8 is fixed at the rear of the sealing shell 3. The protective sleeve 8 has a protective function. The protective sleeve 8 is located outside the hollow plug post 6. A lower bending and tightening unit 9 is arranged between the hollow plug post 6 and the maintenance shell 1. The lower bending and tightening unit 9 is used to stably fix the hollow plug post 6 in the plug hole 7, and at the same time is used to improve the sealing between the hollow plug post 6 and the plug hole 7 to prevent water vapor from entering the interior of the maintenance shell 1.

[0017] In this embodiment, the self-locking sealing unit 5 includes two abutment boxes 51 fixed on the storage shell 2 and the sealing shell 3. A folding strip 52 is provided on one side of the two abutment boxes 51 that are in contact with each other. A semicircular strip 53 is provided at the end of the two folding strips 52. Semicircular blocks 54 are rotatably installed on the inner walls of the two semicircular strips 53. The two semicircular blocks 54 are spliced ​​with each other. The two semicircular blocks 54 can rotate synchronously after splicing. Push rods 55 are fixed on the outer periphery of the two semicircular blocks 54. Tension springs 56 are fixed between adjacent push rods 55 and the abutment boxes 51. The setting of the tension springs 56 facilitates the push rods 55 to drive the two semicircular blocks 54 quickly rotates to achieve engagement, the surface of the semicircular bar 53 is provided with an arc groove 57 adapted to the push rod 55, and the outer side of the abutment box 51 is provided with a strip groove 58 adapted to the push rod 55. The setting of the push rod 55 is convenient for pushing the semicircular block 54 to rotate, so as to facilitate separating the two abutment boxes 51, and the outer periphery of the storage shell 2 is fixed with a rear laminating sealing strip 59, and the outer periphery of the sealing shell 3 is fixed with a front laminating sealing strip 510 used in conjunction with the rear laminating sealing strip 59. The two semicircular blocks 54 quickly rotate and engage with each other, so that the rear laminating sealing strip 59 and the front laminating sealing strip 510 are fitted together to achieve sealing.

[0018] In this embodiment, the lower bending and tightening unit 9 includes a rotating rod 91 rotatably installed at the center of the inner wall of the hollow plug column 6, a disk body 920 is fixed on the surface of the rotating rod 91, and three equally distributed arc-shaped push blocks 92 are fixed on the surface of the disk body 920. Three equally distributed tightening rods 93 are slidably installed on the surface of the hollow plug column 6. The three tightening rods 93 can be synchronously squeezed by the arc-shaped push blocks 92 to achieve the tightening of the tightening rods 93 against the inner wall of the insertion hole 7. The ends of the tightening rods 93 are fixed with friction pads 94, which are used to increase The friction between the large and the plug hole 7 is achieved to prevent the slipping effect. The surface of the tightening rod 93 is fixed with an inner magnetic ring 95, and the inner wall of the hollow plug column 6 is fixed with an outer magnetic ring 96 used in conjunction with the inner magnetic ring 95. The side where the inner magnetic ring 95 and the outer magnetic ring 96 are close to each other is opposite magnetic poles. The attraction between the opposite magnetic poles is used to make the tightening rod 93 quickly reset. The inner wall of the hollow plug column 6 is fixed with a self-locking hollow disk 98 through a support rod 97. The rotating rod 91 passes through and rotates through the self-locking hollow disk 98. The surface of the rotating rod 91 is fixed with a locking ratchet 99, the surface of the self-locking hollow disk 98 is slidably penetrated with a locking tooth 910 used in conjunction with the locking ratchet 99, a locking spring 911 is fixed between the locking tooth 910 and the self-locking hollow disk 98, the setting of the locking spring 911 facilitates the locking tooth 910 to fit the surface of the locking ratchet 99, a transmission rope 912 is fixed to the outside of the locking tooth 910, the transmission rope 912 is a non-elastic rope, the material used in this application is a steel wire rope, a buckle 913 is fixed to the end of the transmission rope 912, and the surface of the rotating rod 91 is fixed There is a driving bend shaft 914, and the locking ratchet 99 can be limited in one direction through the locking tooth 910, so that the locking ratchet 99 can only rotate in one direction, and then the rotating rod 91 can only rotate in one direction, so that when the driving bend shaft 914 is pushed, it can only be pressed in one direction, so that the friction pad 94 can stably be squeezed into contact with the inner wall of the socket 7 without loosening. The end of the locking tooth 910 that contacts the locking ratchet 99 is designed to be in a slope shape, which is used to limit the locking ratchet 99 to rotate in one direction.

[0019] In this embodiment, a ring body 915 is fixed on the surface of the hollow plug 6, a front sealing ring 916 is fixed to the rear of the ring body 915, a rear sealing ring 917 used in conjunction with the front sealing ring 916 is fixed to the front of the inspection housing 1, an annular fitting groove 918 is provided behind the front sealing ring 916, and an embedded ring 919 used in conjunction with the annular fitting groove 918 is provided in front of the rear sealing ring 917. The front sealing ring 916 is hollow in design, and the front sealing ring 916 is deformed after being inflated. To achieve expansion, the original shape can be restored after the gas flows out. An inflation unit 10 is arranged between the driving bending shaft 914 and the hollow plug column 6. The inflation unit 10 is used to automatically input air into the front sealing ring 916 to cause it to deform when the driving bending shaft 914 is pressed down and fixed. The annular fitting groove 918 adopts a design of narrow inside and wide outside. The embedded ring 919 and the rear sealing ring 917 are integrally formed and are both made of rubber. The outer contour of the embedded ring 919 is a truncated cone shape, which is used in fit with the annular fitting groove 918.

[0020] In this embodiment, the inflation unit 10 includes an inflation cylinder 101 fixed on the surface of the hollow plug column 6, and an inflation piston 102 is movably installed on the inner wall of the inflation cylinder 101. The inflation piston 102 and the inflation cylinder 101 have good sealing performance. A spring block 103 is fixed inside the inflation cylinder 101, and a reset spring 104 is fixed between the spring block 103 and the inflation piston 102. The setting of the reset spring 104 is convenient for driving the inflation piston 102 to reset quickly. An extrusion rod 105 is fixed to the rear of the inflation piston 102. The inflation cylinder 101 is connected to the front sealing ring 916 through a conduit 106. A curved block 107 used in conjunction with the extrusion rod 105 is slidably installed on the surface of the hollow plug column 6. An arc-shaped slide groove 108 used in conjunction with the curved block 107 is opened on the surface of the hollow plug column 6. The curved block 107 is fixed to the driving bend shaft 914 by a connecting rod 109, and the curved block 107 can slide in a circular trajectory along the surface of the hollow plug column 6.

[0021] In this embodiment, an inner opening groove 11 is formed on the surface of the hollow plug 6 for use with the driving bend shaft 914, and an outer opening groove 12 is formed on the surface of the protective sleeve 8 for use with the driving bend shaft 914. The arrangement of the inner opening groove 11 and the outer opening groove 12 facilitates the smooth rotation of the driving bend shaft 914. The driving bend shaft 914 can drive the curved block 107 to rotate synchronously through the connecting rod 109, making it convenient for the curved block 107 to squeeze the extrusion rod 105, thereby pushing the inflation piston 102 to move for inflation, and strengthening the sealing when positioning the entire hollow plug 6.

[0022] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0023] When in use, when it is necessary to fix the auxiliary measurement and control device body, the hollow plug post 6 is correspondingly inserted into the socket 7, so that the front sealing ring 916 can fit with the rear sealing ring 917, and then the embedded ring 919 can be embedded in the annular fitting groove 918, and then the drive bending shaft 914 is pushed down to drive the rotating rod 91 to rotate, and then the disk body 920 is driven to rotate, and then the arc-shaped push block 92 can synchronously squeeze the three clamping rods 93 to achieve that the clamping rod 93 is pressed against the inner wall of the socket 7, and the friction The wiping pad 94 increases friction to achieve positioning of the entire hollow plug column 6. During this process, the driving bending shaft 914 can drive the curved block 107 to rotate synchronously through the connecting rod 109, so that the curved block 107 can squeeze the extrusion rod 105, thereby pushing the inflation piston 102 to move for inflation, so that the front sealing ring 916 can expand, and the annular fitting groove 918 can fit more closely with the embedded ring 919, preventing water vapor from entering the interior of the maintenance housing 1 through the socket 7.

[0024] When the auxiliary measurement and control device body needs to be disassembled, pull the buckle ring 913 outward to separate the locking tooth 910 from the locking ratchet 99, and then rotate the drive shaft 914 upward in the reverse direction to make the three locking rods 93 slide synchronously into the hollow plug column 6.

[0025] When it is necessary to separate the sealed shell 3 from the storage shell 2, one of the push rods 55 is bendable, thereby making the two semicircular blocks 54 rotate synchronously. When the push rod 55 is blocked by the arc groove 57 and the straight edge of the semicircular block 54 is flush with the semicircular bar 53, the two abutment boxes 51 can be separated, thereby facilitating the separation of the sealed shell 3 from the storage shell 2. When it is necessary to reassemble the sealed shell 3, the corresponding two abutment boxes 51 are spliced ​​together, and then the two semicircular blocks 54 are quickly rotated and engaged under the elastic force of the tension spring 56 after being spliced, thereby achieving a stable connection between the two abutment boxes 51, thereby achieving a sealed connection between the sealed shell 3 and the storage shell 2.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrical maintenance safety auxiliary device for a thermal power plant, comprising an auxiliary measurement and control device body arranged in front of a maintenance housing (1), the auxiliary measurement and control device body comprising a storage shell (2) and a sealed housing (3), a measurement and control display screen (4) being arranged on the sealed housing (3), characterized in that: A self-locking sealing unit (5) is provided between the storage shell (2) and the sealing shell (3), and the self-locking sealing unit (5) is used to achieve locking and sealing between the storage shell (2) and the sealing shell (3). A hollow plug post (6) is provided at the rear of the storage shell (2), and a plug hole (7) for use with the hollow plug post (6) is provided through the inspection shell (1). A protective sleeve (8) is fixed at the rear of the sealing shell (3), and the protective sleeve (8) is located outside the hollow plug post (6). A lower bending and tightening unit (9) is provided between the hollow plug post (6) and the inspection shell (1), and the lower bending and tightening unit (9) is used to stably fix the hollow plug post (6) in the plug hole (7) and to improve the sealing between the hollow plug post (6) and the plug hole (7).

2. The electrical maintenance safety auxiliary device for a thermal power plant according to claim 1, characterized in that: The self-locking sealing unit (5) comprises two abutment boxes (51) fixed on the storage shell (2) and the sealing shell (3); a folding strip (52) is provided on one side of the two abutment boxes (51) that are in contact with each other; a semicircular strip (53) is provided at the end of each of the two folding strips (52); a semicircular block (54) is rotatably mounted on the inner wall of each of the two semicircular blocks (53); the two semicircular blocks (54) are spliced ​​with each other; and a push rod (55) is fixed on the outer periphery of each of the two semicircular blocks (54). A tension spring (56) is fixed between the adjacent push rods (55) and the abutment boxes (51); an arc groove (57) matching the push rods (55) is formed on the surface of the semicircular strip (53); a strip groove (58) matching the push rods (55) is formed on the outer side of the abutment box (51); a rear laminating sealing strip (59) is fixed to the outer periphery of the storage shell (2); and a front laminating sealing strip (510) used in conjunction with the rear laminating sealing strip (59) is fixed to the outer periphery of the sealing shell (3).

3. The electrical maintenance safety auxiliary device for a thermal power plant according to claim 1, characterized in that: The lower bending and tightening unit (9) comprises a rotating rod (91) rotatably mounted at the center of the inner wall of the hollow plug column (6); a disk body (920) is fixed on the surface of the rotating rod (91); three equally spaced arc-shaped push blocks (92) are fixed on the surface of the disk body (920); three equally spaced tightening rods (93) are slidably mounted on the surface of the hollow plug column (6); a friction pad (94) is fixed at the end of the tightening rod (93); an inner magnetic ring (95) is fixed on the surface of the tightening rod (93); an outer magnetic ring (96) used in conjunction with the inner magnetic ring (95) is fixed on the inner wall of the hollow plug column (6); and the inner wall of the hollow plug column (6) is provided with a plurality of inner magnetic rings (96) for use with the inner magnetic ring (95). A self-locking hollow disk (98) is fixed via a support rod (97); the rotating rod (91) passes through and rotates through the self-locking hollow disk (98); a locking ratchet (99) is fixed to the surface of the rotating rod (91); a locking tooth (910) used in conjunction with the locking ratchet (99) is slidably passed through the surface of the self-locking hollow disk (98); a locking spring (911) is fixed between the locking tooth (910) and the self-locking hollow disk (98); a transmission rope (912) is fixed to the outside of the locking tooth (910); a buckle (913) is fixed to the end of the transmission rope (912); and a driving shaft (914) is fixed to the surface of the rotating rod (91).

4. The electrical maintenance safety auxiliary device for a thermal power plant according to claim 3, characterized in that: A ring body (915) is fixed on the surface of the hollow plug (6), a front sealing ring (916) is fixed to the rear of the ring body (915), a rear sealing ring (917) used in conjunction with the front sealing ring (916) is fixed to the front of the inspection housing (1), an annular fitting groove (918) is provided at the rear of the front sealing ring (916), and an embedded ring (919) used in conjunction with the annular fitting groove (918) is provided in front of the rear sealing ring (917), the front sealing ring (916) is of hollow design, and an air blowing unit (10) is provided between the driving bend shaft (914) and the hollow plug (6), and the air blowing unit (10) is used to automatically input air into the front sealing ring (916) to cause it to deform when the driving bend shaft (914) is pressed down and fixed.

5. The electrical maintenance safety auxiliary device for a thermal power plant according to claim 4, characterized in that: The inflation unit (10) comprises an inflation cylinder (101) fixed on the surface of a hollow plug (6), an inflation piston (102) being movably mounted on the inner wall of the inflation cylinder (101), a spring block (103) being fixed inside the inflation cylinder (101), a return spring (104) being fixed between the spring block (103) and the inflation piston (102), an extrusion rod (105) being fixed behind the inflation piston (102), the inflation cylinder (101) being connected to a front sealing ring (916) via a conduit (106), a curved block (107) for use with the extrusion rod (105) being slidably mounted on the surface of the hollow plug (6), an arcuate slide groove (108) for use with the curved block (107) being provided on the surface of the hollow plug (6), and the curved block (107) being fixed to the driving bending shaft (914) via a connecting rod (109).

6. The electrical maintenance safety auxiliary device for a thermal power plant according to claim 3, characterized in that: The surface of the hollow plug post (6) is provided with an inner opening groove (11) for use in conjunction with the drive bend shaft (914), and the surface of the protective sleeve (8) is provided with an outer opening groove (12) for use in conjunction with the drive bend shaft (914).

7. The electrical maintenance safety auxiliary device for a thermal power plant according to claim 3, characterized in that: The end of the locking tooth (910) that contacts the locking ratchet (99) is designed to be in an inclined shape, and is used to limit the locking ratchet (99) to rotate in only one direction.

8. The electrical maintenance safety auxiliary device for a thermal power plant according to claim 4, characterized in that: The annular fitting groove (918) is designed to be narrow inside and wide outside. The embedded ring (919) and the rear sealing ring (917) are integrally formed. The outer contour of the embedded ring (919) is a truncated cone shape and fits in the annular fitting groove (918) for use.

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