CN113700378B - Transformer substation overhauls uses safe purse seine - Google Patents

Abstract

The invention discloses a safety purse net for overhauling a transformer substation, which belongs to the technical field of safety purse nets and comprises a purse net body and inserted rod devices arranged at two ends of the purse net body, wherein the purse net body comprises a screen-type foldable and storable purse net main body, a first panel and a second panel are respectively arranged at two ends of the purse net main body, and a steel wire rope is controlled by an automatic winder in a penetrating way and can be folded; the inserted bar includes outer barrel, is provided with in the outer barrel and adjusts pole, fixed sleeve, ring flange and three groups circumference array distribution arc warp board and go up connecting rod and lower connecting rod, through rotatory rotation knob can the activity of three groups of arc reducing boards of direct control, realize that the inserted bar is inserted fixedly in different apertures to can avoid all the other reinforcement anti loosening structure.

Description

Transformer substation overhauls uses safe purse seine

Technical Field

The invention relates to the technical field of safety purse nets, in particular to a safety purse net for overhauling a transformer substation.

Background

Currently, safety fences are widely used in the production line, for example: transformer substation, construction site, job site, etc. Wherein, the daily maintenance work of transformer substation is rather than leaving the safety purse seine. When certain equipment or an interval in a transformer substation needs to be overhauled in a power failure mode, corresponding safety measures need to be taken, and the safety purse net is the most basic safety measure. The arrangement of safety purse seine can keep apart electrified part and uncharged part, prevents that personnel from missing into electrified interval, prevents that personnel from missing into the danger area, and to a great extent ensures staff's life safety.

Two types of safety purse nets are commonly used at present. 1. A fishing net type: it is made into a net structure by using a nylon rope and is matched with a safe inserted link for use. When the safety purse net is used, the safety purse net woven by hemp ropes is unfolded and tidied, after the safety purse net is tidied, the net can be formed by unfolding, then the safety purse net is fixed on the two inserting rods by utilizing the redundant ropes at the four corners of the purse net, an isolation surface is formed, and the following operations are repeated until the area to be isolated is completely surrounded. When the purse net is disassembled, the rope tied on the inserted rod is untied, and then the purse net is kneaded randomly to be stored into a group and is stuffed into the storage bag. 2. Reel type safety purse net: the method is characterized in that a long net is directly made of insulating plastics, a whole bundle of enclosing net is unfolded during installation, the net is hung on a hook on an inserted rod by utilizing a hole of the net, and the process is repeated for multiple times until an area to be isolated is completely enclosed. When the purse net is disassembled, all the purse nets are taken down from the hooks of the inserted rods and are paved on the ground, and then the purse net is coiled into a bundle to be stored.

A large amount of time is wasted in the unfolding process of the fishing net type safety purse net, and the installation is complicated. Because the rope is woven and stored, the rope is randomly kneaded into a group and then is stuffed into the storage bag, so the fishing net type safety purse net is easy to knot. This results in wasting a large amount of time and manpower to arrange and expand the safety purse net before using, sometimes even can make the knot, leads to the purse net to be disorderly and have no time to get off, greatly reduced work efficiency. The roll type safety purse net is laid on the ground and rolled up slowly when being stored and needs to be rolled and leveled. However, the storage process is easy to be askew and results in storage failure, so the storage is complex and difficult, and the storage time is too long and tedious. The rolled up product has large volume and is heavy, which is not convenient for carrying and storing.

The length of the traditional safety purse net is fixed and uniform, the distance between the inserted bars on the operation site is different, and in addition, the distance between the inserted bars is more various due to the diversification of work tasks, so the safety purse net with the fixed length often difficultly meets the requirement of the operation site. The length of reel formula and fishing net formula purse seine is all fixed, produces unnecessary part drooping on the inserted bar very easily in the installation, influences isolation effect, influences field personnel work, and fishing net formula purse seine is still blown easily because weight is too light, the structure collapses, has the potential safety hazard.

Although traditional fishing net formula safety purse seine has certain ductility, the ductility is very little, meets when purse seine length is less than the interval between the inserted bar, and the staff can only use the rope to tie up a plurality of purse seines and increase length together. But the scheme not only increases the complexity and difficulty of installation and disassembly, but also wastes a large amount of time, and greatly reduces the working efficiency. When the purse seine is longer than the inserted bar interval, because the purse seine texture is very soft, the purse seine can't be straightened, consequently can cause the flagging condition of purse seine, the influence is kept apart the effect.

In addition, the inserted link of the general specific model of inserted link that uses of current safety purse seine at present, the pole footpath of inserted link is fixed, can only be applicable to the jack of the same size to generally need other supplementary fixed mechanisms to support the fastening after the cartridge, however discovery in the practical application process, the purse seine jack near different equipment in the transformer substation often the aperture is inconsistent, thereby leads to needing to be equipped with the inserted link of multiple pole footpath for the alternate use. Therefore, the construction equipment which needs to be carried is large in size and heavy, and is not convenient to carry and store.

Based on the technical scheme, the invention designs the safety purse net for the transformer substation maintenance, so as to solve the problems.

Disclosure of Invention

The invention aims to provide a safety purse net for transformer substation maintenance, which aims to solve the technical problem.

In order to realize the purpose, the invention provides the following technical scheme: a safety purse seine for transformer substation maintenance comprises a purse seine body and inserted rod devices arranged at two ends of the purse seine body;

the purse net body comprises a purse net main body capable of being folded and stored in a screen-type mode, a first panel and a second panel are fixedly arranged at two ends of the purse net main body respectively, binding pieces are arranged on the upper side and the lower side of each of the first panel and the second panel respectively, the purse net main body is composed of a plurality of unit net surfaces and a plurality of connecting bands used for connecting the two adjacent unit net surfaces, steel wire ropes vertically penetrate through the unit net surfaces after the unit net surfaces are folded in the screen-type mode, one end of each steel wire rope is fixed to the inner side of the second panel, an installation cavity is formed in the first panel, an automatic winder is arranged in the installation cavity of the first panel, and the other end of each steel wire rope is fixed to the automatic winder and keeps a movement trend state of being pulled and wound;

the inserted bar device includes the inserted bar, the inserted bar includes outer barrel, the upper and lower both ends of outer barrel are provided with upper end cover and lower end cover respectively, be provided with the regulation pole in the outer barrel, the top of adjusting the pole is stretched out the upper end cover is connected with the rotation knob, it is located outer barrel inside part includes polished rod section and screw thread section, the outer wall of polished rod section has cup jointed fixed sleeve through ball bearing rotation, fixed sleeve's upper end be provided with outer barrel inner wall fixed mounting's ring flange, fixed sleeve outer wall with be provided with three sets of circumference array distribution arc deformation footpath board between the outer barrel inner wall, every the inner wall of arc deformation footpath board all through last connecting rod and the lower connecting rod of parallel from top to bottom with fixed sleeve outer wall is articulated, the outer wall cover of screw thread section is equipped with lifting sleeve, lifting sleeve's inner chamber through inlay nut seat with the screw thread section, lifting sleeve's outer wall has three sets of actuating lever of handing-over circumference array distribution, three sets of actuating lever's the other end corresponds three sets the middle part of lower connecting rod is articulated.

Preferably, the ligature piece includes that one end is equallyd divide and is do not fixed in son on the first panel outer wall detains bandage and box bandage, the other end that the bandage was detained to the son is connected with son eye-splice, the other end fifty percent discount of box bandage utilizes the japanese letter to adjust to detain to cup joint female eye-splice after fixed.

Preferably, the automatic winder comprises a winder box, a winding shaft used for binding and winding the steel wire rope is rotatably arranged in the winder box, the other end of the steel wire rope extends out of one side wall of the winder box, and a coil spring used for providing automatic winding elasticity for the winding shaft is arranged between the two ends of the winding shaft and the inner wall of the winder box.

Preferably, the automatic winder and the steel wire rope are provided with one group which is arranged up and down in the middle or a plurality of groups which are arranged in parallel at equal intervals.

Preferably, three arc-shaped grooves for the three groups of arc-shaped variable-diameter plates to pass through are formed in the end face of the lower end cover.

Preferably, the circumferential outer wall of the rotating knob is provided with anti-skid grains.

Preferably, the fixed sleeve and the flange are of an integral structure, and the circumferential outer wall of the flange is radially provided with mounting threaded holes.

Compared with the prior art, the invention has the beneficial effects that:

the safety purse net for transformer substation maintenance can be quickly and efficiently installed to realize the isolation of maintenance equipment or a certain area, and can also be disassembled and stored in a portable way, so that the time for installing and disassembling safety measures of workers before the maintenance of the equipment is greatly saved. The universal plug pin has strong universality, can be directly matched with the currently most common plug pins of the transformer substation for use, does not need to replace a large number of plug pins which are equipped in the transformer substation, saves the cost and reduces the popularization difficulty.

Its simple to use is high-efficient, install traditional inserted bar the back, utilize the ligature piece on the purse seine to fix the one end of purse seine on an inserted bar fast, then only need with the another of hand tractive purse seine, the purse seine can be in order under the drawing of wire rope (dress can realize automatic recovery on having the automatic winding ware), stably, smoothly expand optional position (no longer than the maximum extension limit), wait to expand the position of next inserted bar, utilize the ligature piece on the purse seine to fix the purse seine on next inserted bar promptly, so just formed a rail face. This operation is repeated until the equipment is about to be serviced or some interval is completely closed.

The quick-release type safety purse net comprises a frame, a plurality of insertion rods, a plurality of arc diameter-changing plates and a rotary knob, wherein the three groups of arc diameter-changing plates can be gathered or expanded to change diameter are arranged at the bottom of each insertion rod, the rotary knob used for controlling the three groups of arc diameter-changing plates to move is arranged at the top of each insertion rod, and the rotary knob is used for controlling the three groups of arc diameter-changing plates to move.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic view of the structure of the integral safety seine of the present invention;

FIG. 2 is a schematic view of the overall expanded structure of the present invention;

FIG. 3 is a schematic view of the construction of the binding of the present invention;

FIG. 4 is a schematic view of a fastener structure of the tie member of the present invention;

FIG. 5 is a schematic view of an automatic winder according to the present invention;

FIG. 6 is a schematic view of the main body of the seine of the present invention in a folded state;

FIG. 7 is a first schematic view of the application of the binding of the present invention;

FIG. 8 is a second illustration of a ligature application of the present invention;

FIG. 9 is a third schematic view of the manner of application of the binding of the present invention;

FIG. 10 is a schematic view of the structure of the insert rod of the present invention;

FIG. 11 is a schematic view of the internal structure of the insert rod of the present invention;

fig. 12 is a schematic view of the structure of the lower end cap of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1-seine main body, 2-first panel, 3-second panel, 4-binding piece, 41-son buckle binding band, 42-mother buckle binding band, 43-son buckle, 44-mother buckle, 45-Chinese character adjusting buckle, 5-steel wire rope, 6-automatic winder, 61-winder box, 62-winding shaft and 63-coil spring; 2 a-inserted rod, 21 a-outer cylinder body, 22 a-upper end cover, 23 a-lower end cover, 24 a-adjusting rod, 25 a-rotating knob, 26 a-ball bearing, 27 a-fixed sleeve, 28 a-flange plate, 29 a-arc-variable diameter plate, 210 a-upper connecting rod, 211 a-lower connecting rod, 212 a-lifting sleeve, 213 a-nut seat and 214 a-driving rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a safety purse seine for transformer substation maintenance comprises a purse seine body and inserted rod devices arranged at two ends of the purse seine body;

the purse seine body includes but the purse seine main part 1 that the folding accomodate of screen formula, purse seine main part 1 comprises a plurality of unit wire side 101 and a plurality of connecting bands 102 that are used for connecting two adjacent unit wire side 101, a plurality of unit wire side 101 wear to be equipped with wire rope 5 after folding with the screen formula perpendicularly, the both ends of purse seine main part 1 are fixed respectively and are provided with first panel 2 and second panel 3, the upper and lower both sides of first panel 2 and second panel 3 are equallyd divide and are do not be provided with ligature 4, and wire rope 5's wherein one end is fixed in the 3 inboards of second panel, first panel 2 is inside to have the installation cavity, and be provided with automatic winding ware 6 in the installation cavity of first panel 2, wire rope 5's the other end is fixed in on automatic winding ware 6 and keep being pulled the motion trend state of rolling.

Specifically, the folding design similar to a screen is adopted for folding, a plurality of single unit screen surfaces 101 are spliced through hot melting, and a connecting strip 102 is formed at the joint. The rigidity of each individual unit web 101 is greater than the rigidity of the connecting web 102. When the seine needs to be installed, only one end of the seine needs to be fixed on the inserted rod, then the seine main body 1 is unfolded, and one end of the seine needs to be pulled outwards, namely the softer connecting band 102. The purse seine main body 1 can be unfolded one by one, and the length can be adjusted infinitely to the maximum extent; when the purse seine is accomodate to needs, at first take off the one end of purse seine main part 1 from the inserted bar, under the strong resilience force effect of automatic winding ware 6, wire rope 5 is rolled, and every safe purse seine concatenation department can take place the bending again and fold, and 1 piece ground of purse seine main part is piled up to the realization is accomodate fast. Because purse seine main part 1 piles up and forms, consequently withdraw the back volume very little, do benefit to the transport and deposit, can not take place the winding and tie up, also can fast flatly develop the use when having guaranteed the next use simultaneously, the state is shown as figure 5 after purse seine main part 1 accomodates.

Specifically, a steel wire rope 5 which is arranged in the middle or a plurality of steel wire ropes which are arranged in parallel at equal intervals is worn inside the safety purse net, and the steel wire rope is connected with an automatic winding device 6. The number of the steel wire ropes 5 is consistent with that of the automatic winding devices 6, and the steel wire ropes correspond to the automatic winding devices one by one, and the specific application number can be properly increased, decreased and adjusted according to the actual upper and lower width of the purse seine main body 1. The automatic recovery device has an acting force which is pulled back, so that no matter how far the purse net is stretched, even if the stretching length is less than or far less than the maximum stretching limit, the situation that the middle of the purse net falls down due to no tensioning so as to influence the isolation effect like the traditional purse net can be avoided. It should be noted that, the steel wire rope is not fixedly connected with other seines (only a small hole reserved through the seine) except that the steel wire rope is fixedly connected with the first seine (the seine is convenient to unfold and store), that is, the seine can slide on the steel wire rope.

Specifically, automatic winder 6 includes winder box 61, the inside of winder box 61 is rotated and is installed the rolling axle 62 that is used for binding and rolling up wire rope 5, wire rope 5's the other end is stretched out by a lateral wall of winder box 61, be provided with the wind spring 63 that provides automatic rolling elasticity for rolling axle 62 between the both ends of rolling axle 62 and the winder box 61 inner wall, winder box 61 fixed mounting is in first panel 2 internal cavity, under the second panel 3 non-stationary state of purse seine main part 1, rolling axle 62 is owing to receive the torsion effect of upper and lower both ends wind spring 63, and then produce certain pulling force to wire rope 5, realize automatic rolling when accomodating, realize automatic tensioning during the use, prevent that the wire side from relaxing and pulling.

Specifically, the binding member 4 comprises a secondary buckle binding band 41 and a female buckle binding band 42, one ends of which are respectively fixed on the outer wall of the first panel 2, the other end of the secondary buckle binding band 41 is connected with a secondary eye-splice 43, and the other end of the female buckle binding band 42 is folded and is sleeved with a female eye-splice 44 after being fixed by a Chinese character ri-shaped adjusting buckle 45;

the upper and lower position of two lateral walls of first panel 2 and second panel 3 is equipped with a pair of ligature 4 respectively, totally four pairs, and 4 device schematic diagrams of ligature see figure 2, and these four pairs of son box-nuts have three effects:

1. the two ends of the safety purse net can be fixed on the inserted bars. (see FIG. 7).

2. When the length of the purse net is not enough, the binding pieces 4 of the safety purse nets are connected, so that the effect of splicing and lengthening the safety purse nets is achieved. (see FIG. 8).

3. After packing up safe purse seine, be connected two sets of ligature 4 of upper end and lower extreme, can bind the purse seine of packing up as the strapping, prevent that the purse seine from scattering, play and bind and fixed effect, the accomodating and the transportation of the purse seine of being convenient for. (see fig. 9).

Referring to fig. 1 and 10-12, the plunger device includes a plunger 2a, the plunger 2a includes an outer cylinder 21a, an upper end cap 22a and a lower end cap 23a are respectively disposed at upper and lower ends of the outer cylinder 21a, an adjusting rod 24a is disposed in the outer cylinder 21a, a top end of the adjusting rod 24a extends out of the upper end cap 22a and is connected to a rotary knob 25a, an anti-slip pattern is disposed on a circumferential outer wall of the rotary knob 25a, the adjusting rod 24a includes a polished rod section 241a and a threaded section 242a inside the outer cylinder 21a, an outer wall of the polished rod section 241a is rotatably sleeved with a fixed sleeve 27a through a ball bearing 26a, a flange 28a fixedly mounted on an inner wall of the outer cylinder 21a is disposed at an upper end of the fixed sleeve 27a, the fixed sleeve 27a and the flange 28a are integrated, the circumference outer wall of ring flange 28a has radially seted up the installation screw hole, be provided with three sets of circumference array distribution arc reducing plate 29a between the outer wall of fixed sleeve 27a and the outer barrel 21a inner wall, the inner wall of every arc reducing plate 29a all hinges with the outer wall of fixed sleeve 27a through upper link 210a and lower link 211a that parallel from top to bottom, the outer wall cover of screw thread section 242a is equipped with lift sleeve 212a, the inner chamber of lift sleeve 212a is through inlaying nut seat 213a and screw thread section 242a spiro union, the outer wall handing-over of lift sleeve 212a has three sets of circumference array distribution's actuating lever 214a, the other end of three sets of actuating lever 214a corresponds the middle part of three sets of lower links 211a and articulates, set up the three ways arc groove 231a that supplies three sets of arc reducing plate 29a to pass through respectively on the lower extreme lid 23a terminal surface.

The adjusting rod 24a is driven to rotate by rotating the rotating knob 25a, because the polished rod section 241a of the adjusting rod 24a and the fixed sleeve 27a are rotatably sleeved by the ball bearing 26a, the flange 28a on the fixed sleeve 27a is fixedly installed with the inner wall of the outer cylinder 21a, the inner wall of each set of arc diameter-changing plates 29a is hinged by the upper connecting rod 210a and the lower connecting rod 211a which are parallel to each other to form a parallel four-bar structure, and the inner cavity of the lifting sleeve 212a is screwed with the threaded section 242a by embedding the nut seat 213a, when the adjusting rod 24a rotates, the driving rod 214a moves up and down along with the nut seat 213a and the lifting sleeve 212a, and further the lower connecting rod 211a is pushed to swing, so as to drive the arc diameter-changing plates 29a to move up and down and simultaneously gather or strut diameter-changing activities inside and outside, when the purse seinerve is actually assembled and disassembled, the purse seine can directly control the activities of the three sets of arc diameter-changing plates by rotating the rotating knob 25a, thereby realizing the insertion and the insertion of the rods in different apertures, and the purse seine can avoid other anti-loose reinforcing structures, thereby solving the problems that the construction seine needs to be large and the construction equipment is heavy and is not beneficial to the transportation and the storage.

In the description of the invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "two ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the invention.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the terms in the invention is understood by those skilled in the art according to specific situations.

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

Claims (7)

1. The utility model provides a transformer substation overhauls and uses safe purse seine which characterized in that: the purse seine comprises a purse seine body and inserted rod devices arranged at two ends of the purse seine body;

the purse net body comprises a purse net main body (1) capable of being folded and stored in a screen-type mode, a first panel (2) and a second panel (3) are fixedly arranged at two ends of the purse net main body (1) respectively, binding pieces (4) are arranged on the upper side and the lower side of each of the first panel (2) and the second panel (3), the purse net main body (1) is composed of a plurality of unit net surfaces (101) and a plurality of connecting bands (102) used for connecting the two adjacent unit net surfaces (101), a plurality of unit net surfaces (101) vertically penetrate through steel wire ropes (5) after being folded in the screen-type mode, one ends of the steel wire ropes (5) are fixed on the inner side of the second panel (3), an installation cavity is formed in the first panel (2), an automatic winder (6) is arranged in the installation cavity of the first panel (2), and the other ends of the steel wire ropes (5) are fixed on the automatic winder (6) and keep a pulled and wound motion trend state;

the inserted bar device comprises an inserted bar (2 a), the inserted bar (2 a) comprises an outer cylinder (21 a), an upper end cover (22 a) and a lower end cover (23 a) are respectively arranged at the upper end and the lower end of the outer cylinder (21 a), an adjusting rod (24 a) is arranged in the outer cylinder (21 a), the top end of the adjusting rod (24 a) extends out of the upper end cover (22 a) and is connected with a rotating knob (25 a), the adjusting rod (24 a) is positioned in the outer cylinder (21 a) and comprises a polished rod section (241 a) and a threaded section (242 a), the outer wall of the polished rod section (241 a) is rotatably sleeved with a fixed sleeve (27 a) through a ball bearing (26 a), and the upper end of the fixed sleeve (27 a) is provided with a flange (28 a) fixedly mounted on the inner wall of the outer cylinder (21 a), the outer wall of the fixed sleeve (27 a) and the inner wall of the outer cylinder body (21 a) are provided with three sets of arc deformation diameter plates (29 a) distributed in a circumferential array manner, the inner wall of each arc deformation diameter plate (29 a) is hinged to the outer wall of the fixed sleeve (27 a) through an upper connecting rod (210 a) and a lower connecting rod (211 a) which are parallel to each other from top to bottom, the outer wall of the threaded section (242 a) is sleeved with a lifting sleeve (212 a), the inner cavity of the lifting sleeve (212 a) is in threaded connection with the threaded section (242 a) through an embedded nut seat (213 a), the outer wall of the lifting sleeve (212 a) is connected with three sets of driving rods (214 a) distributed in the circumferential array manner, the other ends of the three groups of driving rods (214 a) are hinged corresponding to the middle parts of the three groups of lower connecting rods (211 a).

2. The safety purse net for overhauling a transformer substation according to claim 1, is characterized in that: bandage (41) and box bandage (42) are equallyd divide including one end and do not are fixed in to sub-on the first panel (2) outer wall, the other end that sub-was detained bandage (41) is connected with sub-eye-splice (43), the other end fifty percent discount of box bandage (42) utilizes day word to adjust to detain (45) and has cup jointed female eye-splice (44) after fixed.

3. The safety purse net for overhauling a transformer substation according to claim 1, is characterized in that: automatic winder (6) are including winder box (61), the inside rotation of winder box (61) is installed and is used for binding and rolling wind-up shaft (62) of wire rope (5), the other end of wire rope (5) by a lateral wall of winder box (61) stretches out, the both ends of wind-up shaft (62) with be provided with between winder box (61) the inner wall and be had wind spring (63) that wind-up shaft (62) provide automatic rolling elasticity.

4. The safety purse net for overhauling a transformer substation according to claim 1, is characterized in that: the automatic winder (6) and the steel wire rope (5) are provided with a group which is arranged up and down in the middle or a plurality of groups which are arranged in parallel at intervals in equal intervals.

5. The transformer substation overhauls uses safe purse seine of claim 1, characterized in that: and three arc-shaped grooves (231 a) for the three groups of arc-shaped reducing plates (29 a) to pass through are formed in the end face of the lower end cover (23 a).

6. The safety purse net for overhauling a transformer substation according to claim 1, is characterized in that: the outer wall of the circumference of the rotating knob (25 a) is provided with anti-slip grains.

7. The transformer substation overhauls uses safe purse seine of claim 1, characterized in that: the fixed sleeve (27 a) and the flange plate (28 a) are of an integral structure, and mounting threaded holes are formed in the circumferential outer wall of the flange plate (28 a) in the radial direction.

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