CN2151524Y

CN2151524Y - Case type expansion apparatus

Info

Publication number: CN2151524Y
Application number: CN 93227636
Authority: CN
Inventors: 魏朝晖; 杨秀文; 王志伟; 肖耀荣
Original assignee: SHENYANG TRANSFORMER FACTORY
Current assignee: SHENYANG TRANSFORMER FACTORY
Priority date: 1993-03-22
Filing date: 1993-03-22
Publication date: 1993-12-29
Anticipated expiration: 2003-03-22

Abstract

The utility model belongs to a component for a mutual inductor product and is a case type expansion device arranged on the mutual inductor product. The case type expansion device is suitable for the completely sealed mutual inductor of an oil-dipping type. The utility model comprises an outer cover, expansion film cases, a connection pipe, an indication mechanism for an oil level, etc. The utility model is characterized in that the upper side and the lower side of the expansion device are respectively provided with the indication mechanism for an oil level, comprising a movable support column, a fixed support base, a lever, a connection rod, etc. The conditions of oil level change of the expansion film cases on upper side and the lower side can be reflected through the case type expansion device. The technical problems that oil level change of the expansion film case of only one side can be reflected; the indication is not accurate of a present case type expansion device are solved.

Description

Case type expansion apparatus

The utility model belongs on the instrument transformer product of transformer ' s type a kind of structure member or claims assembly, is mounted in a kind of boxlike expander of transformer oil upper box part, is applicable to hermetically sealed oil immersed type instrument transformer.

The boxlike expander that the one-sided indication oil level that existing hermetically sealed oil immersed type instrument transformer is adopted changes.Its objective is: the oil volume that causes owing to variations in temperature in the compensation fuel tank changes, and is hedged off from the outer world to prevent that air, moisture content etc. from entering fuel tank internal.Its formation is: use the connection pipe that communicates with the instrument transformer fuel tank with each expansion bellows UNICOM in outer cover inside, at the upside of last expansion bellows or be provided with by moving pillar at the downside of expansion bellows down, decide oil level indicating mechanism that bearing and lever etc. constitute etc. and form the boxlike expander of only indicating the oil level variation in a side.Its weak point is: during use, this structure can only reflect expansion bellows or the oil level variation of expansion bellows down, and promptly just the oil level of an expansion bellows changes, so the oil level misregister.

The purpose of this utility model is to overcome the weak point in the above-mentioned prior art, can reflect that the expansion bellows can reflect a kind of boxlike expander of the oil level variation of expansion bellows down and provide.

The purpose of this utility model can reach by following measure: it comprises outer cover, the expansion bellows, backplate, connection pipe etc., its special character: the following middle side part at middle side part on the last expansion bellows and following expansion bellows is equipped with moving pillar and following moving pillar respectively, the middle part of upper lever is connected with last moving pillar hinge, the other end places the slotted eye of the last small end that has oil level Warning Mark or oil level pointer to one end with being fixed on that going up on the upper guard board decides that bearing is dynamically connected or Xiao's downside above the prong, the middle part of following lever with descend to decide bearing hinge to be connected, one end is dynamically connected with following moving pillar, and the other end following lower link lower end coaxial with being positioned at connecting rod is dynamically connected.

The utility model can also make connecting rod pass to be located at the last guide bracket on the upper guard board, and lower link passes the following guide bracket that is located at down on the backplate, so that to the correcting that moves axially of last connecting rod and lower link.

The utility model is described in further detail below in conjunction with accompanying drawing and example:

Fig. 1 is the utility model example structure schematic diagram;

Fig. 2 is Figure 1A-A profile;

Fig. 3 is the A-A profile of the another kind of embodiment of Fig. 1.

With reference to Fig. 1,2,3.Each expansion bellows UNICOM that will comprise expansion bellows 7 and following expansion bellows 15 with connection pipe 13 is housed in outer cover 6.Following middle side part at middle side part on the last expansion bellows 7 and following expansion bellows 15 is respectively equipped with moving pillar 8 and following moving pillar 17.Present embodiment also is with upper reset spring 9 and following back-moving spring 16 respectively on last moving pillar 8 and following moving pillar 17.The middle part of upper lever 10 is connected with last moving pillar 8 hinges, the one end be fixed on going up on the upper guard board 12 and decide bearing 11 flexible connections, its other end places the slotted eye of last connecting rod 4 upper ends that have oil level Warning Mark or oil level pointer 3 or puts downside connecting rod 4 upper end prong Xiao 20.The middle part of following lever 19 be fixed on down backplate 14 on decide bearing 18 hinges and be connected down, the one end flexibly connects with down moving pillar 17, its other end be positioned at upper connecting rod 4 coaxial corresponding following lower link 1 lower ends and be dynamically connected.In the present embodiment end of upper lever 10 with upward decide bearing 11, down being connected of lower end of an end and time moving pillar 17 and the other end and the lower link 1 of lever 19 all adopts being connected of prong and pin, also can adopt being connected of long slot bore and pin.For the position that moves axially of connecting rod in the correcting 4 and lower link 1, connecting rod 4 and lower link 1 pass last guide bracket 5 that is fixed on the upper guard board 12 and the following guide bracket 2 that is fixed on down on the backplate 14 respectively on the present embodiment.

When not oil-filled, oil level mark or oil level pointer 3 are in the lower position.When oil-filled, oil is oil-filled to the expansion bellows by connection pipe 13.Along with the increase of oil mass, following expansion bellows 15 at first expands and drives down moving pillar 17 and moves up downwards and by bar 1 under following lever 19 drives, thereby moving upward connecting rod 4 of holder and oil level mark or pointer 3 move up together, are full of oil until following expansion bellows 15.Oil level under so just reflecting in the expansion bellows 15 changes.Go up expansion bellows 7 when oil-filled when oil mass continues to be increased to, last expansion bellows 7 expands to drive to go up moving pillar 8 and lifting by upper lever 10 and goes up connecting rod 4 and move up, and oil level mark or oil level pointer 3 are also mobile thereupon.At this moment the lower end of going up connecting rod 4 breaks away from the upper end of lower link 1.When last expansion bellows 7 was full of oil, oil level mark or oil level pointer 3 reached upper limit position.The oil level situation of change that so just reflects expansion bellows 7.

Can find out that from above-mentioned compared with the prior art the utility model has the oil level that can reflect upper expansion bellows and change the advantages such as the oil level that can reflect again lower expansion bellows changes, the oil level indication is accurate.

Claims

1, a kind of boxlike expander, comprise outer cover, the expansion bellows, backplate, connection pipe etc., it is characterized in that: go up the last middle side part of expansion bellows and the following middle side part of following expansion bellows and be equipped with moving pillar and following moving pillar respectively, the middle part of upper lever is connected with last moving pillar hinge, one end be fixed on going up on the upper guard board and decide bearing and be dynamically connected, and the other end places the slotted eye of the last small end that has oil level mark or oil level pointer or the downside that prong is sold above, the middle part of following lever with down decide bearing hinge and be connected, one end and moving pillar be dynamically connected and the other end be positioned at the lower link lower end of connecting rod below coaxial and be dynamically connected;

2, according to claims 1 described a kind of boxlike expander, it is characterized in that: go up connecting rod and pass the last guide bracket that is located on the upper guard board, lower link passes the following guide bracket that is located at down on the backplate.