Anti-sedimentation cooling device for GIS tank welding

Abstract

The utility model discloses an anti-sedimentation cooling device for welding a GIS (Gas Insulated Switchgear) tank body, which comprises an annular cooling pipe extending along a welding opening of the GIS tank body, and the distance between the cooling pipe and the welding opening is not more than 7cm; the cooling pipe is provided with a heat-conducting contact piece for increasing the contact area with the GIS tank body; comprising a cooling liquid inlet pipe and a cooling liquid return pipe which are communicated with a cooling pipe, a partition is arranged in an inner cavity of the cooling pipe, and the cooling liquid inlet pipe and the cooling liquid return pipe are located on the two sides of the partition respectively; comprising a cooling source communicated with the cooling liquid inlet pipe and the cooling liquid return pipe, and a cooling medium passing through the cooling source circulates in the cooling liquid inlet pipe, the cooling pipe and the cooling liquid return pipe. The cooling medium of the cooling source circularly flows, the cooling medium absorbs heat and then is cooled by the cooling source, so that local continuous cooling of the side wall of the GIS tank body near the welding port is formed, the risk of surface settlement of the GIS tank body after the temperature is reduced is greatly reduced, and the yield of the GIS tank body is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to GIS tank manufacturing technical field, concretely relates to a kind of anti-settling cooling device for GIS tank welding. BACKGROUND

[0002] GIS tank is the shell of GIS (gas insulated switchgear), and GIS is a kind of electrical equipment, in which circuit breaker, disconnecting switch, grounding switch, current transformer, voltage transformer, surge arrester, bus, connecting piece and outgoing terminal are all enclosed in GIS tank and filled with certain pressure of insulating gas.GIS tank is connected with branch pipe on side surface, and welding sealing is used between branch pipe and GIS tank, and high welding quality is required, and after welding, it needs to be detected by flaw detection process and air-tightness detection.

[0003] The existing welding construction adopts tight welding to reduce the probability of defects such as virtual welding, false welding and unqualified weld size, so as to improve the weld quality and meet the air-tightness detection requirements.But tight welding has the following problems:

[0004] High temperature generated by welding causes local deformation of GIS tank, that is, the welding position causes settlement of GIS tank surface due to thermal expansion and contraction, resulting in rework of unqualified GIS tank.

[0005] For the above problems, the existing processing methods are: 1. According to the thickness of the plate, strictly control the current size; reduce the variable settlement caused by thermal plastic deformation and thermal expansion and contraction.2. Welding adopts outside first and inside second.The settlement formed by outside welding is used to use the thermal plastic deformation and expansion and contraction of inside welding to "arch" back the settlement process technology.This method can indeed reduce the probability of GIS tank surface settlement problem, but it requires high welding operation personnel, and the risk of surface settlement still exists and the probability is not low, so the effect of this method is not obvious, and it is difficult to further improve the qualified rate of GIS tank. INVENTION CONTENTS

[0006] In view of the deficiencies of the prior art, the temperature near the welding port in the welding process is reduced, the risk of surface settlement of GIS tank is reduced, and the qualified rate of GIS tank is improved.The utility model provides an anti-settling cooling device for GIS tank welding, which comprises annular cooling pipe extending along the welding port of GIS tank, and the distance between cooling pipe and welding port is not more than 7cm;The cooling pipe is provided with heat-conducting contact piece for increasing the contact area with GIS tank;It comprises cooling liquid inlet pipe and cooling liquid return pipe communicated with cooling pipe, and the inner cavity of cooling pipe is provided with partition, and cooling liquid inlet pipe and cooling liquid return pipe are located on the two sides of partition respectively;It comprises cooling source communicated with cooling liquid inlet pipe and cooling liquid return pipe, and cooling medium of cooling source circulates in cooling liquid inlet pipe, cooling pipe and cooling liquid return pipe, so as to reduce the temperature near the welding port.

[0007] The anti-settling cooling device has the advantages that:

[0008] 1. The cooling medium of the cooling source circulates and flows during the welding process, the heat of the welded joint is transmitted to the cooling pipe through the heat-conducting contact piece, and the cooling medium is cooled again through the cooling source after absorbing heat, thereby forming continuous cooling of the local GIS tank body side wall near the welded joint, the risk of surface settlement of the GIS tank body is greatly reduced after the temperature is reduced, and the yield of the GIS tank body is improved.

[0009] 2. The welding operator does not need to worry about the settlement problem caused by tight welding, is not distracted, and can focus on improving the welding quality of the weld, thereby reducing the psychological burden of the welding operator.

[0010] 3. The back "arch" process is not used, the operation requirement of the welding operator is reduced, and the experience dependence of the welding process on the welding operator is weakened.

[0011] The preferred scheme provided by the utility model has the advantages that: in order to improve the heat absorption efficiency of the cooling pipe, the cooling pipe adopts a flat shape, that is, the transverse cross-sectional shape of the cooling pipe is oval, and one side of the short axis of the oval shape is adjacent to the GIS tank body. The wide side of the cooling pipe is adjacent to the GIS tank body, the opposite area to the GIS tank body is increased, and the heat absorption rate is improved.

[0012] The preferred scheme provided by the utility model has the advantages that: in order to further improve the heat absorption efficiency of the cooling pipe, the heat-conducting contact piece extends along the length direction of the cooling pipe and wraps the cooling pipe, and the transverse cross-sectional area of the lower part of the heat-conducting contact piece is greater than that of the upper part. The heat-conducting contact piece has a structure that the lower part is large and the upper part is small, the contact area with the GIS tank body is large, the heat of the GIS tank body is quickly absorbed and transmitted to the cooling pipe, and the heat absorption rate of the cooling pipe is further improved. In addition, a heat-conducting silica gel pad is arranged between the heat-conducting contact piece and the GIS tank body, the heat-conducting silica gel pad fills the fine gap between the lower surface of the heat-conducting contact piece and the GIS tank body, and the heat absorption rate of the cooling pipe is further improved.

[0013] The preferred scheme provided by the utility model has the advantages that: a heat insulation sleeve is sleeved outside the cooling inlet pipe and the cooling return pipe, and the cooling inlet pipe and the cooling return pipe are perpendicular to the GIS tank body. The heat insulation sleeve reduces the heat transfer between the outside of the cooling inlet pipe and the cooling return pipe and the surrounding air, and the cooling inlet pipe and the cooling return pipe are arranged vertically, so that the influence on the welding operation is reduced as much as possible, and the welding operation is not hindered.

[0014] The preferred scheme provided by the utility model provides: the heat conduction contact piece is equipped with two lugs, and the two lugs are respectively located at the two sides of the GIS tank body. The elastic member is arranged between the two lugs, the elastic member is sleeved on the GIS tank body, and the heat conduction contact piece is tightly attached to the outer surface of the GIS tank body through the elastic force of the elastic member. After the cooling pipe is in full contact with the GIS tank body through the heat conduction contact piece, the heat conduction contact piece is tightly fixed and welded near the welding port by using the elastic member, the heat dissipation efficiency of the cooling pipe on the welded part is maintained during the welding process, and the probability of the surface subsidence problem of the GIS tank body is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0016] Figure 1 It is a structure schematic view of the anti-settlement cooling device for GIS tank body welding in the utility model.

[0017] Figure 2 It is a sectional view of A-A direction in Figure 1 It is a top view of

[0018] Figure 3 It is a perspective view of Figure 1

[0019] Figure 4 It is a sectional view of A-A direction in Figure 2

[0020] Figure 5 It is an enlarged view of B in Figure 4

[0021] Reference signs: cooling pipe 1, heat conduction contact piece 2, heat conduction silica gel pad 3, lug 4, elastic member 5, cooling liquid inlet pipe 6, cooling liquid return pipe 7, heat insulation sleeve 8, GIS tank body 9, branch pipe 10. DETAILED DESCRIPTION

[0022] In view of the deficiencies in the prior art, the present utility model person has long-term research and a large number of practices, and the technical scheme of the present utility model is obtained. The technical scheme, its implementation process and principles will be further explained and described below in combination with the drawings in the embodiments of the present application and specific implementation cases.

[0023] ​​​It should be noted that the embodiments described below by reference to the drawings are exemplary only, and are used to explain the present application, and should not be understood as a limitation of the present application, and the described embodiments are only some of the embodiments of the present application, and are not all the embodiments. Based on the embodiments in the present application, the present application covers any alternative, modification, equivalent method and scheme defined by the claims, and all other embodiments obtained by those of ordinary skill in the art without creative labor, which belong to the protection scope of the present application.

[0024] In the description of the present application, unless explicitly defined and limited, the technical terms or scientific terms used should be understood as the general meaning understood by those skilled in the art in the field to which the present application belongs, and the terms such as "mounting", "connection" and "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or it can be a resisting connection or an integral connection; for those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] Embodiment one;

[0026] As shown in Figure 1 , Figure 2 Embodiment one provides an anti-settling cooling device for GIS tank welding, which comprises a ring-shaped cooling pipe 1 extending along the welding joint of the GIS tank 9, and the distance between the cooling pipe 1 and the welding joint is L, L is not greater than 7 cm. For example, the distance between the cooling pipe 1 and the circular welding joint is 4 cm, 5 cm or 6 cm, etc., which is determined according to the width of the weld and the tightness of the welding. The greater the tightness, the smaller the distance, and within the range of not more than 7 cm, the best heat dissipation effect can be obtained at the welding joint. If it exceeds 7 cm, the heat dissipation effect near the welding joint is weakened, and the possibility of collapse of the GIS tank 9 surface is increased. But not limited to 7 cm, but also can be adaptively selected according to the wall thickness of the GIS tank 9.

[0027] In order to improve the heat absorption effect of the cooling pipe 1, the present embodiment adopts the following structure:

[0028] As shown in Figure 3 , Figure 4 and Figure 5As shown, the cooling pipe 1 is equipped with a heat-conducting contact element 2 to increase the contact area with the GIS tank 9. The heat-conducting contact element 2 extends along the length of the cooling pipe 1 and wraps around it, with the lower cross-sectional area of ​​the heat-conducting contact element 2 being larger than the upper cross-sectional area. The heat-conducting contact element 2 has a structure that is larger at the bottom and smaller at the top, resulting in a large contact area with the GIS tank 9. This allows for rapid absorption and transfer of heat from the GIS tank 9 to the cooling pipe 1, improving the heat absorption rate of the cooling pipe 1. To maintain sufficient contact, a heat-conducting silicone pad 3 is provided between the heat-conducting contact element 2 and the GIS tank 9. The heat-conducting silicone pad 3 fills the gap between the lower surface of the heat-conducting contact element 2 and the GIS tank 9, further enhancing the heat absorption rate of the cooling pipe 1.

[0029] The method of fixing the thermally conductive contact 2 is as follows:

[0030] like Figure 2 , Figure 3 and Figure 4 As shown, the thermally conductive contact 2 has two lifting lugs 4, located on both sides of the GIS tank 9. An elastic element 5 is provided between the two lifting lugs 4. This elastic element 5 can be an elastic rope, a long tension spring, etc., and this embodiment is not limited, as long as it can be tied to the GIS tank 9 and tightened between the two lifting lugs 4. The elastic element 5 is fitted onto the GIS tank 9, and the elastic force of the elastic element 5 keeps the thermally conductive contact 2 tightly attached to the outer surface of the GIS tank 9. After the cooling pipe 1 makes full contact with the GIS tank 9 through the thermally conductive contact 2, the elastic element 5 is used to firmly fix the thermally conductive contact 2 near the welding joint. During the welding process, the heat dissipation efficiency of the cooling pipe 1 to the welding part is maintained, effectively reducing the probability of surface settlement problems on the GIS tank 9.

[0031] like Figure 5 As shown, in order to further improve the heat absorption rate of cooling pipe 1, the cooling pipe 1 in this embodiment adopts a flat shape, that is, the cross-sectional shape of cooling pipe 1 is elliptical, and the short axis side of the ellipse is adjacent to the GIS tank 9. The wider side of cooling pipe 1 is adjacent to the GIS tank 9, increasing the area directly opposite the GIS tank 9, thereby improving the heat absorption rate of the directly opposite side.

[0032] The embodiment also includes a cooling inlet pipe 6 and a cooling return pipe 7 respectively communicating with the cooling pipe 1, the inner cavity of the cooling pipe 1 is provided with a partition, and the cooling inlet pipe 6 and the cooling return pipe 7 are respectively located on the two sides of the partition. The cooling inlet pipe 6, the cooling pipe 1 and the cooling return pipe 7 form a one-way flow channel. The outer part of the cooling inlet pipe 6 and the outer part of the cooling return pipe 7 are sleeved with a heat insulation sleeve 8, and the cooling inlet pipe 6 and the cooling return pipe 7 are perpendicular to the GIS tank body 9. The outer part of the cooling inlet pipe 6 and the cooling return pipe 7 are arranged vertically to minimize the impact on the welding operation and not to hinder the welding operation. The embodiment also has a cooling source (not shown in the figure) communicating with the cooling inlet pipe 6 and the cooling return pipe 7, which can be a liquid cooling machine with refrigeration function (cooling medium is liquid), a gaseous cooling machine with refrigeration function (cooling medium is gas), or a water circulation radiator with heat dissipation function. The specific type of cooling source is not limited in this embodiment, as long as it can flow in the cooling pipe 1 to take away heat. In order to reduce the heat transfer between the outer part of the cooling inlet pipe 6 and the outer part of the cooling return pipe 7 and the surrounding air, the heat insulation sleeve 8 tightly wraps the outer part of the cooling inlet pipe 6 and the outer part of the cooling return pipe 7, maintaining the low temperature state of the cooling medium. During the welding process, the cooling medium in the cooling source circulates, the heat of the welding joint is transmitted to the cooling pipe 1 through the heat-conducting contact piece 2, and the cooling medium is cooled again through the cooling source after absorbing heat, thereby forming a local and continuous cooling of the side wall of the GIS tank body 9 near the welding joint. After the temperature is reduced, the risk of surface subsidence of the GIS tank body 9 is greatly reduced, and the yield of the GIS tank body 9 is improved.

[0033] Embodiment two:

[0034] Embodiment two provides a GIS tank tight welding method based on the anti-settlement cooling device for welding the GIS tank 9 in embodiment one, the steps are as follows:

[0035] S1: Select the cooling pipe 1 and the heat-conducting contact piece 2 according to the size of the welding joint on the side of the GIS tank 9, and the heat-conducting contact piece 2 can be attached to the outer surface of the GIS tank 9. The cooling pipe 1 and the heat-conducting contact piece 2 are fixed together to form an integrated structure.

[0036] S2, paste a circle of heat-conducting silica gel pad 3 around the welding joint.

[0037] S3, attach the lower surface of the heat-conducting contact piece 2 to the heat-conducting silica gel pad 3.

[0038] S4, one end of the elastic member 5 is hung on the lug 4 on one side of the heat-conducting contact 2, and the other end of the elastic member 5 is hung on the lug 4 on the other side of the heat-conducting contact 2 after passing through the GIS tank 9, so that the heat-conducting contact 2 is tightly pressed on the heat-conducting silica gel pad 3 through the tight elastic member 5, thereby keeping the cooling pipe 1 and the heat-conducting contact 2 tightly fixed with the GIS tank 9.

[0039] S5, the cooling source is started, and the cooling medium of the cooling source flows into the cooling pipe 1 from the cooling inlet pipe 6, flows through the cooling pipe 1 and then flows back to the cooling source from the cooling return pipe 7, so as to form a circulating cooling pipe 1 path.

[0040] S6, the branch pipe 10 is butted against the welding port of the GIS tank 9, and the two are tightly welded and fixed by using a tight welding method, and the welding is completed.

[0041] The GIS tank 9 tight welding method provided by the embodiment can not use the back "arch" process technology, the operation requirement of the welding operator is reduced, and the experience dependence of the welding process on the welding operator is weakened.

[0042] It should be understood that the above embodiments are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable those skilled in the art to understand the content of the utility model and implement it, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, some simple deductions or substitutions can be made without departing from the concept of the utility model, and any equivalent changes or modifications made according to the spirit and essence of the utility model should be covered within the protection scope of the utility model.

Claims

1. A settling-prevention cooling device for welding GIS tanks, characterized in that: It includes an annular cooling pipe extending along the weld joint of the GIS tank, with the distance between the cooling pipe and the weld joint not exceeding 7 cm; the cooling pipe is provided with a heat-conducting contact element to increase the contact area with the GIS tank. It includes a cooling inlet pipe and a cooling return pipe connected to the cooling pipe, wherein the inner cavity of the cooling pipe is provided with a partition, and the cooling inlet pipe and the cooling return pipe are respectively located on both sides of the partition; It includes a cooling source connected to the cooling inlet pipe and the cooling return pipe respectively. The cooling medium of the cooling source circulates in the cooling inlet pipe, the cooling pipe and the cooling return pipe, thereby reducing the temperature near the weld joint.

2. The anti-settlement cooling device for welding GIS tanks according to claim 1, characterized in that: The cross-sectional shape of the cooling pipe is elliptical, and the short axis of the ellipse is adjacent to the GIS tank.

3. The anti-settlement cooling device for welding GIS tanks according to claim 2, characterized in that: The thermally conductive contact extends along the length of the cooling pipe and wraps around it.

4. The anti-settlement cooling device for welding GIS tanks according to claim 3, characterized in that: The cross-sectional area of ​​the lower part of the thermally conductive contact is larger than that of the upper part.

5. A settling prevention and cooling device for welding GIS tanks according to claim 1, characterized in that: Both the cooling inlet pipe and the cooling return pipe are fitted with heat insulation sleeves.

6. The anti-settlement cooling device for welding GIS tanks according to claim 1, characterized in that: The thermally conductive contact component is equipped with two lifting lugs, which are located on both sides of the GIS tank.

7. A settling prevention and cooling device for welding GIS tanks according to claim 6, characterized in that: An elastic element is provided between the two lifting lugs. The elastic element is fitted onto the GIS tank, and the elastic force of the elastic element will press the heat-conducting contact element tightly against the outer surface of the GIS tank.

8. A settling prevention and cooling device for welding GIS tanks according to claim 1, characterized in that: Both the cooling inlet pipe and the cooling return pipe are perpendicular to the GIS tank.

9. A settling prevention and cooling device for welding GIS tanks according to claim 1, characterized in that: A thermally conductive silicone pad is provided between the thermally conductive contact and the GIS tank.

Images