Outdoor oil-immersed transformer with protection effect

Abstract

The utility model discloses an outdoor oil-immersed transformer with a protection effect, which comprises a transformer body which is provided with a plurality of binding posts at equal intervals, and is characterized in that the binding posts are provided with protective covers which are connected in a buckling manner; a first sealing ring is arranged between the protective cover and the binding post, one side of the protective cover is provided with a channel for a cable to pass through, and the top of the protective cover is provided with a detachable rain shielding sleeve. The protective cover effectively blocks rainwater and dust, protects the joint of the cable and the binding post, and reduces erosion. Multiple sealing measures are adopted, damp air is prevented from entering the protective cover, the erosion risk of the connecting column is reduced, and the service life of the thermoplastic pipe is prolonged; and the double rain shielding parts are designed, rainwater is prevented from directly impacting the sealing device and the sinking groove, it is ensured that the transformer body stably operates in severe weather, the product has the protection effect, and the service life of waterproof measures is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field especially relates to an outdoor oil immersed transformer with protection effect. BACKGROUND

[0002] Oil immersed transformer has good insulation performance, good heat conduction performance, is cheap simultaneously, solves transformer large capacity heat dissipation problem and high voltage insulation problem.

[0003] Although the existing outdoor oil immersed transformer will adopt corresponding waterproof measures when wiring, for example, the connecting part of the wire and the terminal post is sleeved with a thermoplastic tube, which is shrunk and tightly fitted on the exposed part of the wire and the terminal post by high temperature, to prevent rainwater from penetrating. However, with the increase of use time, the aging process of the thermoplastic tube may be accelerated due to long-term exposure to rainwater and humid air, resulting in gaps at the connecting part.

[0004] These gaps provide a penetration path for rainwater and humid air, which may cause short circuit failure. In addition, the invasion of humid air may also cause the terminal post to rust, thereby increasing the contact resistance value and causing excessive heat generation. Therefore, although the initial waterproof measure can effectively prevent rainwater from penetrating, there is still a certain risk of electrical failure and safety hazard with the passage of time and environmental erosion. Therefore, the applicant has made beneficial design and found a method to solve the above problems. The technical scheme to be introduced below is generated in this background. SUMMARY

[0005] The utility model discloses a product with protection effect, prolongs the service life of waterproof measure to overcome the deficiency of traditional outdoor oil immersed transformer in electrical connection design.

[0006] To solve the above problems, the utility model adopts the following technical scheme.

[0007] An outdoor oil immersed transformer with protection effect, comprising a transformer body, the transformer body is equipped with a plurality of equidistant terminal posts, the terminal post is equipped with a buckle connection protection cover, a first sealing ring is arranged between the protection cover and the terminal post, one side of the protection cover is provided with a channel for the cable to pass through, the top of the protection cover is provided with a detachable rainproof sleeve, the rainproof sleeve is provided with a first rainproof part extending away from the axis and bending downward, the first rainproof part is provided with a second rainproof part bending downward away from the sealing device, the channel is provided with a sealing device for tightly fitting the sealing device on the surface of the cable.

[0008] Preferably, the terminal post comprises an insulator, a plurality of equidistant first grooves are uniformly arranged on one end of the insulator with a round dot as a pivot, a second groove is arranged on one side of the first groove, a support portion is arranged on the outer wall of the insulator and below the first groove, and the support portion is provided with a sink.

[0009] Preferably, the insulator is internally provided with a conductive rod, and a conductive connecting piece is arranged on the top of the conductive rod and in the protective cover.

[0010] Preferably, the protective cover is provided with a through hole through which the insulator passes, the inner wall of the through hole is provided with a fixing block corresponding to the first groove, and the first sealing ring is arranged between the through hole and the insulator.

[0011] Preferably, one end of the protective cover is provided with a first counterbore which abuts against the inner wall of the sink, and the other end of the protective cover is provided with a second counterbore.

[0012] Preferably, the rainproof sleeve is sleeved on the second counterbore and fixed in the second counterbore through a screw, and a second sealing ring is arranged between the rainproof sleeve and the second counterbore.

[0013] Preferably, the channel is internally provided with a necking portion.

[0014] Preferably, the sealing device comprises an insulating sealing sleeve and a compression joint, the insulating sealing sleeve is provided with an inclined portion which abuts against the necking portion, and the compression joint is threadedly connected to the channel and abuts against the insulating sealing sleeve.

[0015] Beneficial effects:

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] (1) The utility model effectively prevents rainwater and dust from directly contacting the connection part of the cable and the terminal post, reduces the erosion of the external environment on the connection point, and further, the first sealing ring, the second sealing ring and the sealing device are provided, which effectively prevents the outside humid air from entering the inside of the protective cover, ensures the dry environment inside, reduces the risk of the connection column being eroded by the humid air, and effectively prolongs the service life of the thermoplastic pipe.

[0018] (2) The utility model avoids that the rainwater directly falls in the sealing device and the sink through the first rainproof portion, reduces the direct influence of the rainwater on the sealing device, the second rainproof portion further prevents the rainwater from blowing on the inlet of the sealing device under the action of wind, and the above design combination prevents the rainwater from entering the sink, which not only prolongs the service life of the sealing device, but also ensures the stable operation of the transformer body in severe weather conditions, so that the product has the advantage of protection effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a structure schematic view of the outdoor oil-immersed transformer with the protection effect of the utility model;

[0020] Fig. 2 It is a side cross-section structure schematic view of the outdoor oil-immersed transformer with the protection effect of the utility model;

[0021] Fig. 3 It is an exploded schematic view of the outdoor oil-immersed transformer with the protection effect of the utility model;

[0022] The correspondence between the reference signs in the drawing and the component names is as follows:

[0023] Reference signs: 1, transformer body; 2, terminal post; 3, protective cover; 4, first sealing ring; 5, sealing device; 6, rainproof sleeve; 7, second sealing ring;

[0024] 21, insulator; 22, conductive rod; 23, conductive connecting piece;

[0025] 211, first groove; 212, second groove; 213, support part; 214, sink groove;

[0026] 31, channel; 32, through hole; 33, fixed block; 34, first counterbore; 35, second counterbore;

[0027] 311, neck-in part;

[0028] 61, first rainproof part; 62, second rainproof part;

[0029] 71, insulating sealing sleeve; 72, compression joint;

[0030] 711, inclined part. DETAILED DESCRIPTION

[0031] The technical solutions of the utility model will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0032] In the description of the utility model, it is understood that the directions or position relations indicated by the terms "upper", "lower", "left", "right" and the like are the directions or position relations shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular direction, be constructed and operated in a particular direction, therefore, it cannot be understood as a limitation on the utility model.

[0033] In the embodiments of the utility model, "and / or" is only a kind of description of the association relationship of associated object, it indicates that there can be three kinds of relations, for example, A and / or B, it can indicate: exist A alone, exist A and B simultaneously, exist B alone these three cases.In addition, the character " / " in this paper generally indicates that the front and rear associated objects are a kind of "or" relation.

[0034] Reference example Figs. 1 to 3 A kind of outdoor oil-immersed transformer with protective effect, including transformer body 1, the transformer body 1 is equipped with several equidistant terminal posts 2, the terminal post 2 is equipped with the protective cover 3 of buckle connection, the protective cover 3 with terminal post 2 between is equipped with first sealing ring 4, one side of the protective cover 3 is equipped with the passage 31 for cable to pass through, the top of the protective cover 3 is equipped with detachable rainproof sleeve 6, the rainproof sleeve 6 is equipped with the first rainproof part 61 extending away from its axis direction and bending downward, the first rainproof part 61 is equipped with the second rainproof part 62 bending downward away from sealing device 5, the passage 31 is equipped with sealing device 5, for making sealing device 5 closely adhere to cable surface, effectively prevent rainwater and dust from directly contacting cable and terminal post 2 connection by protective cover 3, reduce the erosion of external environment to connecting point;Second, equipped with first sealing ring 4, second sealing ring 7 and sealing device 5, effectively prevent the outside humid air from entering the protective cover 3 inside, ensure its dry environment, thereby reduce the risk of humid air erosion of connecting column, and effectively prolong the service life of thermoplastic pipe;By the first rainproof part 61, rainwater is avoided to directly fall in sealing device 5 and sink groove 214, reduce the direct influence of rainwater to sealing device 5, the second rainproof part 62 further prevents rainwater from blowing on the entrance of cable in sealing device 5 under the action of wind force, while the above design combination prevents rainwater from entering into sink groove 214, the above design not only improves the service life of sealing device 5, but also ensures the stable operation of transformer body 1 under severe weather conditions;

[0035] It is worth mentioning that the terminal post 2 includes insulator 21, the one end of the insulator 21 is evenly distributed with several equidistant first grooves 211 with round dot as axis, one side of the first groove 211 is equipped with second groove 212, the outer wall of the insulator 21 is equipped with support part 213 and is arranged below the first groove 211, the support part 213 is equipped with sink groove 214, first groove 211 ensures that fixed block 33 stably enters, provides guiding effect for protective cover 3, and second groove 212 plays a key anti-drop role, effectively prevents protective cover 3 from accidentally separating from insulator 21;

[0036] It is worth mentioning that the insulator 21 is provided with a conductive rod 22, the top of the conductive rod 22 is provided with a conductive connector 23, and is arranged in the protective cover 3, the conductive rod 22 is electrically connected with the low-voltage coil or the high-voltage coil in the transformer body 1, ensuring smooth transmission of current, and the conductive connector 23 provides a stable electrical connection structure with the exposed part of the cable;

[0037] It is worth mentioning that the protective cover 3 is provided with a through hole 32 for the insulator 21 to pass through, the inner wall of the through hole 32 is provided with a fixing block 33 corresponding to the first groove 211, during installation, the fixing block 33 is first completely embedded in the first groove 211, then the fixing block 33 is guided to smoothly transition to the second groove 212 by rotating the protective cover 3, this step not only realizes the firm connection between the protective cover 3 and the insulator 21, but also provides the function of being convenient to quickly disassemble, making the maintenance and overhaul work more convenient and efficient;

[0038] It is worth mentioning that one end of the protective cover 3 is provided with a first counterbore 34 and abuts against the inner wall of the sink groove 214, the first sealing ring 4 is arranged between the first counterbore 34 and the sink groove 214, the other end of the protective cover 3 is provided with a second counterbore 35, a labyrinth seal structure is formed between the first counterbore 34 and the sink groove 214, the second counterbore 35 and the rainproof sleeve 6, multiple sealing barriers are formed, the sealing performance of the connection between the two is improved, on this basis, the first sealing ring 4 further enhances the connection sealing between the first counterbore 34 and the sink groove 214, effectively preventing the penetration of humid air into the inside of the protective cover 3, ensuring the dry environment inside the protective cover 3, providing a reliable guarantee for the safe operation of the equipment;

[0039] It is worth mentioning that the rainproof sleeve 6 is sleeved on the second counterbore 35 and is fixed in the second counterbore 35 through screws, a second sealing ring 7 is arranged between the rainproof sleeve 6 and the second counterbore 35, the second sealing ring 7 further enhances the connection sealing between the second counterbore 35 and the rainproof sleeve 6, forming a more rigorous protective barrier, which effectively blocks the intrusion path of humid air, ensures the dry environment inside the protective cover 3, thereby reducing the risk of moisture of internal parts and ensuring the safe and stable operation of the equipment;

[0040] It is worth mentioning that the channel 31 is provided with a necked portion 311, the diameter of the necked portion 311 is large at the top and small at the bottom;

[0041] It is worth mentioning that the sealing device 5 comprises an insulating sealing sleeve 71 and a compression joint 72, the insulating sealing sleeve 71 is provided with an inclined part 711 and abuts against the necked part 311, and the compression joint 72 is screwed to the channel 31 and abuts against the insulating sealing sleeve 71, in the installation process, the cable is firstly threaded through the compression joint 72 and the insulating sealing sleeve 71, a copper nose is fixed at the exposed part of the cable, the copper nose is fixedly connected with the conductive connecting piece 23, then the compression joint 72 is gradually screwed, the insulating sealing sleeve 71 is contracted to the axial direction under the extrusion of the necked part 311 and is tightly fitted with the surface of the cable, the tight fitting effectively blocks the invasion path of the external humid air, ensures the dry environment inside the protective cover 3, thereby reducing the risk of moisture of the internal parts and guaranteeing the safe and stable operation of the equipment.

[0042] The product has the advantages of having a protection effect and prolonging the service life of the waterproof measure through the design scheme.

[0043] The above is further detailed description of the utility model in combination with specific embodiments, and the utility model cannot be limited to the description, and the ordinary skilled in the art of the utility model can make some simple deductions or substitutions without departing from the concept of the utility model, and all should be regarded as belonging to the protection scope determined by the claims of the utility model.

Claims

1. An outdoor oil-immersed transformer with a protective effect, comprising a transformer body (1) provided with a plurality of equally spaced terminals (2), characterized in that: The terminal post (2) is provided with a buckle connection protective cover (3), a first sealing ring (4) is arranged between the protective cover (3) and the terminal post (2), one side of the protective cover (3) is provided with a channel (31) for passing through a cable, the top of the protective cover (3) is provided with a detachable rainproof sleeve (6), the rainproof sleeve (6) is provided with a first rainproof part (61) extending away from the axis and bending downward, the first rainproof part (61) is provided with a second rainproof part (62) bending downward away from the sealing device (5), the channel (31) is provided with a sealing device (5) for tightly fitting the sealing device (5) to the surface of the cable.

2. The outdoor oil-immersed transformer with a protection effect according to claim 1, characterized in that: The terminal post (2) comprises an insulator (21), a plurality of equidistant first grooves (211) are uniformly arranged at one end of the insulator (21) with a round dot as the axis, one side of the first groove (211) is provided with a second groove (212), the outer wall of the insulator (21) is provided with a support part (213) arranged below the first groove (211), and the support part (213) is provided with a sink (214).

3. The outdoor oil-immersed transformer with a protection effect according to claim 2, characterized in that: The insulator (21) is provided with a conductive rod (22), the top of the conductive rod (22) is provided with a conductive connecting piece (23) arranged in the protective cover (3).

4. The outdoor oil-immersed transformer with protection effect according to claim 2, characterized in that: The protective cover (3) is provided with a through hole (32) for passing through the insulator (21), the inner wall of the through hole (32) is provided with a fixing block (33) corresponding to the first groove (211), and the first sealing ring (4) is arranged between the through hole (32) and the insulator (21).

5. The outdoor oil immersed transformer with protection effect according to claim 1, characterized in that: One end of the protective cover (3) is provided with a first counterbore (34) abutting the inner wall of the sink (214), and the other end of the protective cover (3) is provided with a second counterbore (35).

6. The outdoor oil-immersed transformer with a protection effect according to claim 5, characterized in that: The rainproof sleeve (6) is sleeved on the second counterbore (35) and fixed in the second counterbore (35) by a screw, and a second sealing ring (7) is arranged between the rainproof sleeve (6) and the second counterbore (35).

7. The outdoor oil immersed transformer with protection effect according to claim 1, characterized in that: The channel (31) is provided with a neck-in part (311).

8. An outdoor oil-immersed transformer with a protection effect according to claim 7, characterized in that: The sealing device (5) comprises an insulating sealing sleeve (71) and a compression joint (72), the insulating sealing sleeve (71) is provided with an inclined part (711) abutting the neck-in part (311), and the compression joint (72) is threadedly connected to the channel (31) and abuts the insulating sealing sleeve (71).

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