CN105186342A - Safety protection device for on-load replacing or cleaning of fans of box-type transformer - Google Patents

Abstract

The invention discloses a safety protection device for changing or cleaning a fan of a box-type transformer with load, including an insulating sleeve structure, an insulating umbrella cloth structure, an insulating fixing structure, and an insulating operating rod. The insulating sleeve structure includes an insulating sleeve one and an insulating sleeve two , the transformer house has a door, the exhaust fan is located on the roof of the transformer top, the insulation sleeve 1 and the insulation sleeve 2 are connected to the inner roof of the transformer house, the insulation sleeve 1 is located on the wall near the exhaust fan fan side, and the insulation sleeve 2 Located near the top of the transformer, the insulating umbrella cloth structure includes an insulating rubber sheet with a rated voltage of 38kV and a scroll spring. The scroll spring is set in the insulating sleeve. The upper end of the insulating rubber sheet is connected to the outer end of the scroll spring. The axial direction of the barrel is provided with an axial groove for the insulating rubber sheet to be rolled into and protruded from the inner cavity of the insulating sleeve, and the lower end of the insulating rubber is provided with an umbrella connection hole, and the umbrella connection hole is connected to the insulating fixing structure .

Description

Safety protection device for box transformer fan with load replacement or cleaning

Technical field:

The invention relates to a safety protection device for on-load replacement or cleaning of a fan of a box-type transformer.

Background technique:

At present, more and more box-type transformers are used in the power system. In order to make the overall structure compact and occupy less space, the space on the inner wall of the box-type transformer is relatively narrow. Repair work brings inconvenience. For example, the exhaust fan is located close to the roof. At the same time, the distance between the exhaust fan and the middle and low voltage side bushings is relatively close. It is difficult to meet the requirements for a safe net distance. To prevent the staff from getting an electric shock with the bushing on the medium and low voltage side when replacing and cleaning the exhaust fan, and to ensure the safety of the operator, it is necessary to cut off the power to the box transformer. Because the power outage affects the economic benefits of the power supply system, it also brings inconvenience and loss to users, which affects both social and economic benefits.

Invention content:

The invention provides a safety protection device for changing or cleaning the fan of a box-type transformer with load; There is no need for power outages or the power outage time can be reduced, and the staff can be prevented from electric shock. There are 826 box-type substations in the Jinan power supply area, which can reduce the power outage time of users by more than 400 hours, reduce power outages by 260MWh, and reduce economic losses by 148,630 yuan. The social and economic benefits are remarkable.

The technical scheme that the present invention adopts for solving the problems of the technologies described above is:

A safety protection device for on-load replacement or cleaning of a box-type fan, including an insulating sleeve structure, an insulating umbrella cloth structure, an insulating fixing structure arranged on the wall of a transformer house, and an insulating operating rod. The insulating sleeve structure includes an insulating sleeve 1. Insulation sleeve 2. The transformer house is provided with a door on the side close to the transformer. The exhaust fan is located on the roof at the top of the transformer. The insulation sleeve 1 and insulation sleeve 2 are connected to the inner roof of the transformer house. The insulation sleeve 1 Located on the wall near the side of the exhaust fan, the insulating sleeve two is located close to the top of the transformer, the insulating sleeve two is arranged perpendicular to the insulating sleeve one, and the insulating umbrella cloth structure includes insulating rubber with a rated voltage of 38kV sheet, scroll spring, and scroll spring are arranged in insulating sleeve 1 and insulating sleeve 2 respectively, and the upper end of the insulating rubber sheet is connected with the outer end of the scroll spring. There is an axial groove matching the width of the insulating rubber sheet for the insulating rubber sheet to roll in and out of the inner cavity of the insulating sleeve. The lower end of the insulating rubber is provided with an umbrella connection hole, and the umbrella connection hole is connected to the Insulated fixed structural connections.

The insulating fixing structure adopts an insulating hook or an insulating card slot, and the insulating hook or insulating card slot is connected with the connecting hole of the umbrella part. The hook is made of a material with better insulating performance, and the position of the connecting hole is reinforced to increase its strength.

The insulating and fixing structures are arranged at different positions on the wall, wherein there are two insulating and fixing structures that cooperate with the insulating sleeve and are located near the bottom of the transformer house; there is one insulating and fixing structure that cooperates with the insulating sleeve, and the position is the same The height and direction of the transformer bushing match.

The insulating operating rod includes a connected bending part, an intermediate connecting part and a handle part, and the two ends of the intermediate connecting part are detachably connected to the bending part and the handle part respectively.

The insulating rubber sheet at the inclined part connected to the insulating sleeve one isolates the transformer bushing, and the vertical part of the insulating rubber sheet connected to the insulating sleeve one isolates the space near the door from the transformer.

Beneficial effects of the present invention:

1. The present invention is simple in structure and easy to use, so that only one person can complete the installation and disassembly work, which greatly reduces the labor intensity of the staff, saves time and effort, and greatly improves the work efficiency; the space occupied by the insulating umbrella when it is usually placed Small, light weight, very easy to change assembly and disassembly.

2. The insulating sleeve of the present invention is fixed on the top wall of the box-type transformer, which can effectively isolate the live bushing of the transformer and protect personal safety. The rubber insulating umbrella cloth cooperates with the inner cavity of the insulating sleeve. Under the action of the scroll spring, the inner cavity of the insulating sleeve can be rolled up with the scroll spring, and the insulating umbrella cloth is connected and installed on the wall through the insulating umbrella cloth connecting hole and the insulating hook, so that the insulating umbrella cloth can be reliably fixed. When not in use, the insulating umbrella cloth shrinks and is located in the slideway of the insulating sleeve, which is very convenient for storage. When in use, the staff stand at the door close to the side of the transformer, keep a sufficient safety distance, insert the insulating rod into the connecting hole of the insulating umbrella cloth, slowly stretch the umbrella cloth and fix the umbrella cloth on the corresponding hook according to the isolation position, The spring in the slideway stretches naturally to send out the umbrella cloth slowly. The insulating umbrella cloth will completely cover the live bushing of the transformer and effectively isolate the live part. The staff can safely enter the box transformer to replace or clean the fan. The present invention is simple and compact in structure, easy to make and use, does not need to consume huge manpower and material resources, greatly reduces the risk of electric shock for staff, reduces the power failure time of users, improves the reliability of power supply, and saves the working time of the operator and reduces the labor of the operator. Strength, improve work efficiency.

Description of drawings:

Figure 1 is a schematic diagram of the top view structure inside the box transformer;

Fig. 2 is the A-A sectional structural schematic diagram of Fig. 1;

Fig. 3 is the schematic diagram of the B-B sectional structure of Fig. 1;

Fig. 4 is a schematic diagram of the structure of the insulating operating rod.

In the figure, 1. insulating cloth sleeve; 2. insulating cloth; 3. insulating fixing structure; 4. exhaust fan; 5. transformer bushing; 6. insulating operating rod; 7. door.

Detailed ways:

In order to clearly illustrate the technical solution of the present invention, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings.

A safety protection device for on-load replacement or cleaning of a box-type fan, including an insulating sleeve structure, an insulating umbrella cloth structure, an insulating fixing structure arranged on the wall of a transformer house, and an insulating operating rod. The insulating sleeve structure includes an insulating sleeve 11. Insulation sleeve 212. The transformer house is provided with a door 7 on the side close to the transformer. A certain number of hooks or card slots are set at the place where the safe static distance meets the relevant standards of the power industry. The insulation sleeve 1 can be used for hanging insulation operations pole. The exhaust fan is located on the roof of the transformer top, the insulating sleeve one 11 and the insulating sleeve two 12 are connected to the inner roof of the transformer house, the insulating sleeve one 11 is located on the wall near the exhaust fan fan side, and the insulating sleeve two 12 Located close to the upper part of the transformer, the second insulating sleeve 12 is vertically arranged with the first insulating sleeve 11 . Of course, more insulating sleeves and insulating umbrella cloth structures can also be provided. The entire insulating umbrella cloth structure 2 adopts a stretchable projection cloth connection structure. The insulating umbrella cloth structure 2 includes an insulating rubber sheet with a rated voltage of 38kV, a scroll The spring and the scroll spring are respectively arranged in the first insulating sleeve 11 and the second insulating sleeve 12, and the upper end of the insulating rubber sheet is connected with the outer end of the scroll spring, and the axial direction of the first insulating sleeve 11 and the second insulating sleeve There is an axial groove matching the width of the insulating rubber sheet for the insulating rubber sheet to roll in and out of the inner cavity of the insulating sleeve. The lower end of the insulating rubber is provided with an umbrella connection hole, which is connected to the insulating sleeve. Fixed structural connections.

The insulating fixing structure adopts an insulating hook or an insulating card slot, and the insulating hook or the insulating card slot is connected with the connecting hole of the umbrella part. The hook is made of materials with better insulation performance, and the position of the connection hole is reinforced to increase the strength and avoid tearing and deformation under force.

A plurality of insulating and fixing structures 3 are arranged at different positions on the wall, among which there are two insulating and fixing structures 3 that cooperate with the insulating sleeve 11, and are located near the lower part of the transformer house; the insulating and fixing structures 3 that cooperate with the insulating sleeve 12 are provided There is one, the position matches the height direction of the transformer bushing.

The insulating operating rod 6 includes a curved portion 61 , an intermediate connecting portion 62 , and a handle portion 63 . Both ends of the intermediate connecting portion 62 are detachably connected to the bending portion 61 and the handle portion 63 .

The insulating rubber sheet 2 of the part shown in Figure 1, the insulating rubber sheet 2 of the inclined part connected to the insulating sleeve 12 as shown in Figure 2 isolates the transformer bushing 5, and the parts of Figure 2 and Figure 3 are connected to the insulating sleeve The insulating rubber sheet 2 vertical part that tube one 11 connects will close to the door 7 and isolate the transformer.

The insulating umbrella cloth of the present invention is retracted into the inner cavity of the insulating sleeve by the elastic force of the scroll spring when not in use, and when the insulating umbrella cloth is required to be connected with the insulating hook through the insulating operating rod 6, it is pulled out forcefully Insulating umbrella cloth, the insulating umbrella cloth is pulled out after overcoming the elastic force of the vortex spring, the insulating umbrella cloth is stretched outward, and hung on the hook position to form the required protective net to cover the live part, as shown in Figure 1 The insulating rubber sheet 2 and the insulating rubber sheet 2 of the inclined part connected to the insulating sleeve 12 shown in FIG. 2 isolate the transformer bushing 5. The vertical part of the insulating rubber sheet 2 isolates the approaching door 7 from the transformer, so as to ensure the safety and reliability of the package operator's operation. After the insulating umbrella cloth is used, when the insulating hook 6 is disconnected from the insulating umbrella cloth, under the action of the resilience of the scroll spring, the insulating umbrella cloth rebounds into the inner cavity of the insulating sleeve to meet the requirements of the automatic shrinkage of the umbrella cloth. need. In order to meet the needs of different voltage levels, the overall structure of the insulating sleeve must meet the relevant power industry standards, and both the tension spring and the shell must be wrapped with insulating leather or made of insulating materials.

The insulating sleeve is fixed before the transformer is put into operation. The axial groove size of the inner cavity of the sleeve needs to be long enough, and at the same time, the entire length of the insulating umbrella cloth should be long enough to isolate the charged body in different positions.

The insulating sleeve of the present invention is fixed on the top wall of the box-type transformer, which can effectively isolate the live bushing of the transformer and protect personal safety. The rubber insulating umbrella cloth cooperates with the inner cavity of the insulating sleeve. Under the action of the coil spring, the inner cavity of the insulating sleeve can be rolled up with the scroll spring, and the insulating umbrella cloth is connected and installed on the wall through the insulating umbrella cloth connecting hole and the insulating hook, so that the insulating umbrella cloth can be reliably fixed. When not in use, the insulating umbrella cloth shrinks and is located in the slideway of the insulating sleeve, which is very convenient for storage. When in use, the staff stand at the door 7 near the transformer side, keep a sufficient safety distance, insert the insulating rod into the connecting hole of the insulating umbrella cloth, slowly stretch the umbrella cloth and fix the umbrella cloth on the corresponding hook according to the isolation position , the spring in the slideway stretches naturally to send out the umbrella cloth slowly, the insulating umbrella cloth will completely cover the live bushing of the transformer, effectively isolate the live part, and the staff can safely enter the box transformer to replace or clean the fan. The present invention is simple and compact in structure, easy to make and use, does not need to consume huge manpower and material resources, greatly reduces the risk of electric shock for staff, reduces the power failure time of users, improves the reliability of power supply, and saves the working time of the operator and reduces the labor of the operator. Strength, improve work efficiency.

Although the specific implementation of the invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. On the basis of the technical solution of the present invention, those skilled in the art can make various Modifications or variations are still within the protection scope of the present invention.

Claims (5)

1. a case becomes the replacing of fan belt load or cleaning safety device, it is characterized in that, comprise tube form, insulation umbrella cloth structure, be located at the insulating fixing structure of transformer wall within doors, insulating bar, described tube form comprises insulating sleeve one, insulating sleeve two, transformer room is being provided with a doorway near transformer side, ventilating fan blower fan is positioned at the roof of transformer top, described insulating sleeve one, insulating sleeve two is connected with the inner roof in transformer room, insulating sleeve one is positioned at the wall near ventilating fan blower fan side, described insulating sleeve two is positioned at the position above transformer, described insulating sleeve two is arranged with insulating sleeve one vertical direction, described insulation umbrella cloth structure comprises the insulation sheet rubber of rated voltage 38kV, scroll spring, scroll spring is located at insulating sleeve one respectively, in insulating sleeve two, the upper end of insulation sheet rubber is connected with the outer end of scroll spring, described insulating sleeve one, being axially arranged with and insulation sheet rubber width fits of insulating sleeve two, involve in for insulation sheet rubber, stretch out the axial groove of insulating sleeve inner chamber, the bottom of electro-insulating rubber is provided with umbrella portion connecting hole, described umbrella portion connecting hole is connected with described insulating fixing structure.

2. case as claimed in claim 1 becomes the replacing of fan belt load or cleaning safety device, it is characterized in that, described insulating fixing structure adopts insulating hanger or insulation draw-in groove, insulating hanger or insulation draw-in groove are connected with umbrella portion connecting hole, hook selects the good material of insulation property to make, and is gained in strength by consolidation process in connecting hole position.

3. case as claimed in claim 1 becomes the replacing of fan belt load or cleaning safety device, it is characterized in that, described insulating fixing structure is located at wall diverse location, and the insulating fixing structure wherein coordinated with insulating sleeve one is provided with two, is positioned near transformer room lower position; The insulating fixing structure coordinated with insulating sleeve one is provided with one, matches with bushing shell for transformer short transverse in position.

4. case as claimed in claim 1 becomes the replacing of fan belt load or cleaning safety device, it is characterized in that, described insulating bar comprise be connected bend, middle interconnecting piece, Handheld Division, the two ends of middle interconnecting piece adopt removably connect with bend, Handheld Divisions respectively.

5. case as claimed in claim 1 becomes the replacing of fan belt load or cleaning safety device, it is characterized in that, bushing shell for transformer is kept apart by the insulation sheet rubber of the sloping portion be connected with insulating sleeve one, comes in the space on close doorway and transformer isolation by the insulation sheet rubber vertical component be connected with insulating sleeve one.