Winding pressing device for IGCC unit dry type transformer

Abstract

The invention relates to the technical field of winding pressing, and particularly discloses a winding pressing device for a dry-type transformer of an IGCC (integrated gasification combined cycle) unit, which comprises a transformer part and a pressing part, the transformer part comprises an iron core and a winding sleeved outside the iron core, and clamps are mounted on two sides of the top end of the iron core in an attached manner; the supporting part is arranged on the upper surface of the winding and used for supporting the clamping piece, the supporting part comprises a steel sleeper and a cushion block arranged on the upper surface of the steel sleeper, a fixing assembly is arranged between the cushion block and the clamping piece, and the fixing assembly is used for pressing the winding; according to the invention, while the winding is fixed, the second sound influencing the discharge fault judgment is removed, the single discharge fault judgment sound of the transformer is ensured, and the maintenance cost and unnecessary economic loss caused by shutdown maintenance due to misjudgment are effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of winding pressing down, and in particular to a winding pressing down device for an IGCC unit dry-type transformer. Background Art

[0002] The dry-type transformer is mainly composed of a core made of silicon steel sheets and a winding cast with epoxy resin. An insulating cylinder is placed between the high and low voltage windings to increase electrical insulation. The high and low voltage windings are generally supported by pads and pressure nails to ensure stability.

[0003] A disc is placed between the traditional pad and the pressure pin to improve the overall stability. However, the disc and the pressure pin are both made of metal. Due to thermal expansion and contraction, there will be a certain gap between the pressure pin and the disc when it is cold. At this time, the disc cannot be fixed by the pressure pin, so it will make a "squeaking" sound under the vibration generated by the operation of the transformer itself.

[0004] The "squeaking" sound is a signal for judging the discharge fault of the dry-type transformer. At this time, the "squeaking" sound caused by the inability to fix the disc will affect the judgment, which not only increases the maintenance cost, but also causes unnecessary economic losses due to shutdown and maintenance. Summary of the invention

[0005] In view of the above problems existing in the existing winding pressing device for dry-type transformer of IGCC unit, the present invention is proposed.

[0006] Therefore, an object of the present invention is to provide a winding pressing device for a dry-type transformer of an IGCC unit.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a winding pressing device for a dry-type transformer of an IGCC unit, comprising:

[0008] The transformer part includes an iron core and a winding sleeved outside the iron core, and clamps are fitted on both sides of the top of the iron core;

[0009] The supporting part is arranged on the upper surface of the winding for supporting the clamping piece, and comprises a steel pillow and a cushion block arranged on the upper surface of the steel pillow. A fixing component is arranged between the cushion block and the clamping piece, and the fixing component is used to press the winding.

[0010] As a preferred solution of the winding pressing device for the dry-type transformer of the IGCC unit described in the present invention, there are three groups of windings, and there are four supporting parts located on each of the windings, and the four supporting parts are symmetrically distributed.

[0011] As a preferred solution of the winding pressing device for the dry-type transformer of the IGCC unit described in the present invention, the pad is made of 20Mn23AIV, and its length, width and height dimensions are 13.5 cm, 4.5 cm and 0.4 cm respectively.

[0012] As a preferred solution of the winding pressing device for the dry-type transformer of the IGCC unit described in the present invention, the two ends of the cushion block are arc-shaped structures, the surface of the steel pillow is provided with an inner groove, and the size of the inner groove is adapted to the size of the cushion block.

[0013] As a preferred solution of the winding pressing device for the dry-type transformer of the IGCC unit described in the present invention, the fixing assembly includes a pressing nail, a support sleeve is sleeved on the pressing nail, and a rotating part is threadedly connected to the end of the pressing nail.

[0014] As a preferred solution of the winding pressing device for the dry-type transformer of the IGCC unit described in the present invention, an insulating member is further provided between the support sleeve and the rotating member, and the insulating member is used for electrical isolation.

[0015] As a preferred solution of the winding pressing device for the dry-type transformer of an IGCC unit described in the present invention, the insulating member comprises an insulating sleeve and an insulating pad, and the insulating sleeve is arranged between the pressing pin and the supporting sleeve.

[0016] As a preferred solution of the winding pressing device for the dry-type transformer of an IGCC unit described in the present invention, the length of the insulating sleeve is longer than the support sleeve, and the height difference between the insulating sleeve and the support sleeve forms a boss, and the boss is used to support the clamp.

[0017] As a preferred solution of the winding pressing device for the dry-type transformer of an IGCC unit described in the present invention, the length of the insulating sleeve being longer than the supporting sleeve is equal to the thickness of the clamp.

[0018] As a preferred solution of the winding pressing device for the dry-type transformer of an IGCC unit described in the present invention, an adhesive layer is provided between the cushion block and the steel pillow.

[0019] The beneficial effects of the present invention are as follows: while fixing the winding, the present invention eliminates the second sound that affects the judgment of the discharge fault, thereby ensuring the singleness of the transformer discharge fault judgment sound, and effectively reducing the maintenance cost and unnecessary economic losses caused by shutdown and maintenance due to misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0021] Figure 1 The figure is a schematic diagram of the overall structure of the winding pressing device for the dry-type transformer of the IGCC unit according to the present invention.

[0022] Figure 2 The present invention is a schematic structural diagram of the transformer part of the winding pressing device for the dry-type transformer of the IGCC unit.

[0023] Figure 3 The present invention is a schematic structural diagram of the support part of the winding pressing device for the dry-type transformer of the IGCC unit.

[0024] Figure 4 The figure is a schematic diagram of the exploded structure of the support part of the winding pressing device for the dry-type transformer of the IGCC unit according to the present invention. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] Example 1

[0030] Reference Figure 1-4 , provides a winding pressing device for a dry-type transformer of an IGCC unit, comprising:

[0031] The transformer part 100 includes an iron core 101 and a winding 102 sleeved outside the iron core 101, and clamps 103 are attached to both sides of the top of the iron core 101;

[0032] The supporting part 200 is arranged on the upper surface of the winding 102 for supporting the clamp 103, and includes a steel pillow 201 and a cushion block 202 arranged on the upper surface of the steel pillow 201. A fixing component 203 is arranged between the cushion block 202 and the clamp 103, and the fixing component 203 is used to press the winding 102.

[0033] Furthermore, there are three groups of windings 102, and there are four supporting parts 200 located on each winding 102. The four supporting parts 200 are symmetrically distributed, and the four supporting parts 200 are symmetrically arranged on the windings 102 in pairs. With the help of the clamps 103, force is applied to the windings 102 to give the windings 102 a downward pressure, so that they are firmly fixed on the base, thereby preventing the windings 102 from loosening due to vibration during operation of the dry-type transformer, thereby ensuring the long-term safe use of the dry-type transformer.

[0034] Specifically, the pad 202 is made of 20Mn23AIV, which is a high-manganese, low-magnetic steel belonging to the Fe-Mn-Al-C series of austenitic metal materials. It has high tensile strength and yield strength, as well as good elongation, and is easy to process. During processing and manufacturing, cutting, welding, drilling, bending, and other operations are as easy as ordinary steel, which reduces processing difficulty and cost;

[0035] The length, width and height of the pad 202 are 13.5 cm, 4.5 cm and 0.4 cm respectively, and a rubber pad is attached to the bottom of the pad 202, which has better support. Since the pad 202 is made of metal, it will shrink in cold weather due to the principle of thermal expansion and contraction. It was originally tightly fitted with the fixing component 203, but after shrinkage, a small gap will inevitably appear between the pad 202 and the fixing component 203. Once a gap appears, it means that the pad 202 is no longer restricted by the fixing component 203. Therefore, when the dry-type transformer is working, there will be a sound of the pad 202 hitting the steel pillow 201 due to vibration. The sound is a "squeaking" sound, and the "squeaking" sound is used to judge whether the dry-type transformer has a discharge fault sound. At this time, if the "squeaking" caused by the loose pad 202 is misjudged as a discharge fault, it will not only increase the maintenance cost, but also need to bear the economic loss caused by the shutdown and maintenance;

[0036] In order to solve this problem, the size of the pad 202 and the rubber pad at its bottom will play a major role. When the size of the pad 202 becomes larger, the contact area with the steel pillow 201 becomes larger, and the friction force also increases, thereby preventing shaking and collision. The rubber pad has good elasticity. When the fixing component 203 squeezes the pad 202, the rubber pad will be compressed and retracted. When the pad 202 shrinks due to the cold weather, the rubber pad will rebound according to its characteristics and fill the gap caused by the shrinkage of the pad 202, thereby effectively solving the "squeaking" sound caused by the looseness of the pad 202, while also ensuring the stability of the winding 102, eliminating the second sound that affects the judgment of the discharge fault, and providing accuracy for the judgment of the transformer discharge fault.

[0037] Furthermore, both ends of the cushion block 202 are arc-shaped structures, and an inner groove is opened on the surface of the steel pillow 201. The size of the inner groove is adapted to the size of the cushion block 202. The cushion block 202 is placed in the inner groove. The inner groove can limit the displacement of the cushion block 202 and ensure that the cushion block 202 can function stably.

[0038] Furthermore, the fixing assembly 203 includes a pressing pin 203a, a support sleeve 203b is sleeved on the pressing pin 203a, and a rotating member 203c is threadedly connected to the end of the pressing pin 203a.

[0039] Specifically, the length of the pressure pin 203a is greater than the length of the support sleeve 203b, the bottom end of the pressure pin 203a is against the cushion block 202, the support sleeve 203b is sleeved on the outside of the pressure pin 203a, and the bottom end of the support sleeve 203b is against the bottom of the pressure pin 203a, and the upper end is attached to the bottom of the clamp 103, the upper end of the pressure pin 203a is provided with a pipe thread on the outside, and one end with the pipe thread passes through the clamp 103, and the inner part of the screw 203c is provided with an internal thread, and the screw 203c is connected to the inner thread. The pressure pin 203a is screwed onto the pipe thread and fits tightly onto the clamp 103. Since the clamp 103 is fixed, the pressure pin 203a is moved downward by screwing the screw 203c. The downward force of the pressure pin 203a acts on the winding 102 through the pad 202 and the steel pillow 201, giving the winding 102 a downward pressure, so that it is firmly fixed on the base, avoiding the loosening of the winding 102 due to vibration during operation of the dry-type transformer, and ensuring the long-term safe use of the dry-type transformer.

[0040] Example 2

[0041] Reference Figure 4 This embodiment is different from the first embodiment in that an insulating member is provided between the support sleeve 203b and the rotating member 203c, and the insulating member is used for electrical isolation.

[0042] Furthermore, the insulating member includes an insulating sleeve 203d and an insulating pad 203e, and the insulating sleeve 203d is arranged between the pressing pin 203a and the supporting sleeve 203b.

[0043] Furthermore, the length of the insulating sleeve 203 d is longer than that of the supporting sleeve 203 b , and the height difference between the insulating sleeve 203 d and the supporting sleeve 203 b forms a boss 203 f , which is used to support the clamp 103 .

[0044] Furthermore, the insulating sleeve 203 d is longer than the supporting sleeve 203 b and is equal to the thickness of the clamp 103 .

[0045] The insulating property of the insulating member can isolate conductors with power or different potentials, ensure electrical isolation between the windings 102 and between the windings 102 and the iron core 101, prevent short circuits, and ensure the working safety of the dry-type transformer.

[0046] The rest of the structure is the same as that of Example 1.

[0047] Example 3

[0048] This embodiment is different from the above embodiments in that an adhesive layer is provided between the cushion block 202 and the steel sleeper 201 .

[0049] Specifically, the adhesive layer uses acrylic glue, which can fix the cushion block 202 and the steel pillow 201 while forming a soft contact between the cushion block 202 and the steel pillow 201, which has a firm fixing effect and avoids the "squeaking" sound caused by the collision between the cushion block 202 and the steel pillow 201 during vibration, which affects the fault judgment of the dry-type transformer itself.

[0050] The rest of the structure is the same as that of Example 2.

[0051] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0052] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0053] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A winding pressing device for a dry-type transformer of an IGCC unit, characterized in that: include: The transformer part (100) comprises an iron core (101) and a winding (102) sleeved outside the iron core, and clamps (103) are fitted on both sides of the top of the iron core (101); The support part (200) is arranged on the upper surface of the winding (102) for supporting the clamp (103), and comprises a steel pillow (201) and a cushion block (202) arranged on the upper surface of the steel pillow (201), a fixing component (203) is arranged between the cushion block (202) and the clamp (103), and the fixing component (203) is used to press the winding (102).

2. The winding pressing device for the dry-type transformer of an IGCC unit according to claim 1, characterized in that: There are three groups of windings (102) in total, and there are four supporting parts (200) located on each of the windings (102), and the four supporting parts (200) are symmetrically distributed.

3. The winding pressing device for the dry-type transformer of an IGCC unit according to claim 2, characterized in that: The cushion block (202) is made of 20Mn23AIV, and its length, width and height are 13.5 cm, 4.5 cm and 0.4 cm respectively.

4. The winding pressing device for the dry-type transformer of an IGCC unit according to claim 3, characterized in that: Both ends of the cushion block (202) are arc-shaped structures, and an inner groove is provided on the surface of the steel pillow (201), and the size of the inner groove is adapted to the size of the cushion block (202).

5. The winding pressing device for the IGCC dry-type transformer according to claim 4, characterized in that: The fixing assembly (203) comprises a pressing pin (203a), a support sleeve (203b) is sleeved on the pressing pin (203a), and a rotating member (203c) is threadedly connected to the end of the pressing pin (203a).

6. The winding pressing device for the dry-type transformer of an IGCC unit according to claim 5, characterized in that: An insulating member is also provided between the support sleeve (203b) and the rotating member (203c), and the insulating member is used to perform electrical isolation.

7. The winding pressing device for the dry-type transformer of an IGCC unit according to claim 6, characterized in that: The insulating member comprises an insulating sleeve (203d) and an insulating pad (203e), and the insulating sleeve (203d) is arranged between the pressing pin (203a) and the supporting sleeve (203b).

8. The winding pressing device for the dry-type transformer of an IGCC unit according to claim 7, characterized in that: The length of the insulating sleeve (203d) is longer than that of the supporting sleeve (203b), and the height difference between the insulating sleeve (203d) and the supporting sleeve (203b) forms a boss (203f), and the boss (203f) is used to support the clamp (103).

9. The winding pressing device for the dry-type transformer of an IGCC unit according to claim 8, characterized in that: The insulating sleeve (203d) is longer than the supporting sleeve (203b) and the length is equal to the thickness of the clamp (103).

10. The winding pressing device for the IGCC dry-type transformer according to claim 9, characterized in that: An adhesive layer is provided between the cushion block (202) and the steel pillow (201).

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