Water cooling device for cooling asymmetric J-shaped groove welding position of thin-walled pipe and plate

Abstract

The utility model relates to the technical field of welding position cooling, in particular to a water cooling device for cooling a welding position of an asymmetric J-shaped groove of a thin-walled tube and a plate. The water cooling device for cooling the asymmetric J-shaped groove welding position of the thin-walled pipe and the plate specifically comprises a water feeder, a water spraying head, an inclined sleeve, a water passing head, a water supply pipe, a tensioning piece and a connector. The inclined sleeve is located above the heater sleeve, the water spraying head penetrates through the inclined sleeve and then extends into the heater sleeve, the water passing head is connected with the water spraying head, the water supply pipe is communicated with the water passing head and the connector, the other end of the connector is connected with the water feeder, the tensioning piece abuts against the heater sleeve, the connector abuts against the tensioning piece through the nut, and the connector is communicated with the water feeder. The device has the advantages that the heater sleeve at the welding position can be rapidly cooled, and welding deformation is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding place cooling technical field especially relates to a kind of water cooling devices of thin-walled pipe and plate asymmetric J groove welding place cooling. BACKGROUND

[0002] The pressurizer is one of the main equipments of the primary circuit of the nuclear power plant, and its function is to maintain the pressure of the primary circuit at a constant pressure during the operation of the power plant. The electric heater element of the lower head assembly is a key component for the pressurizer to regulate the pressure of the primary circuit. When the nuclear power plant is operating normally, the heating and regulating function of the electric heater assembly can be maximized to reduce the action of other safety systems (such as spraying, upflow and downflow systems). The electric heater element is composed of an electric heater sleeve and an electric heater. The connection method between the electric heater element and the lower head is as follows: first, the electric heater sleeve is welded to the lower head using a J groove weld, and then the electric heater is inserted into the pressurizer through the heater sleeve. The electric heater sleeve and the electric heater are distributed in 4 circles on the lower head, with different numbers of electric heater elements in each circle, totaling more than 100 pieces. The lower head and the electric heater sleeve are assembled in a vertical state.

[0003] According to the calculation of the outer diameter of the electric heater and the inner diameter of the sleeve, the theoretical gap between them is only 0.7mm when the electric heater is inserted into the inner wall of the electric heater sleeve. The design requires that after the sleeve is welded to the head, the electric heater can safely pass through the sleeve into the pressurizer without jamming and without damaging the base material. Therefore, a rod passing test is required after the electric heater sleeve is welded. The outer diameter of the rod passing device is 22.55mm, which requires that the shrinkage deformation of any quadrant of the electric heater sleeve and the lower head after welding should not be greater than 0.425mm.

[0004] The connection method between the electric heater sleeve and the lower head is asymmetric J groove weld, and the sleeve is made of austenitic stainless steel. The stainless steel has the characteristics of low thermal conductivity, strong thermal sensitivity and large expansion coefficient, which is prone to welding deformation. The sleeve has a thickness of only 6.3mm, which is poor in rigidity, and the welding filler amount is large, which will further aggravate the welding shrinkage. The above conditions determine that the welding of this weld will easily produce large welding deformation.

[0005] Therefore, a kind of water cooling devices of thin-walled pipe and plate asymmetric J groove welding place cooling is provided to overcome the deficiencies of the prior art. UTILITY MODEL CONTENTS

[0006] In order to overcome the deficiencies of the prior art, the utility model provides a kind of water cooling devices of thin-walled pipe and plate asymmetric J groove welding place cooling, to solve the problem of welding deformation caused by heat accumulation aggravating welding shrinkage.

[0007] In order to achieve the above object, the utility model discloses the following technical scheme:

[0008] A kind of water cooling device for cooling at asymmetric J-shaped groove welding place of thin-walled pipe and plate, comprising: water supply, water jet head, inclined sleeve, water head, water supply pipe, tensioning member and connector;

[0009] The inclined sleeve is located above the heater sleeve, the water jet head is inserted into the heater sleeve after penetrating the inclined sleeve, the water head is connected with the water jet head, the water supply pipe is connected with the water head and the connector, the other end of the connector is connected with the water supply, the tensioning member is in contact with the heater sleeve, the connector is in contact with the tensioning member through nut, and the connector is communicated with the water supply.

[0010] As a further improvement of the utility model technical scheme, the water jet head includes a head and a water jet part, the head is detachably connected with the inclined sleeve by screw, and the water jet part is located in the heater sleeve.

[0011] As a further improvement of the utility model technical scheme, the water jet part is provided with a plurality of through holes, and the plurality of through holes are communicated between the inside of the water jet head and the inner wall of the heater sleeve.

[0012] As a further improvement of the utility model technical scheme, the through holes are obliquely aligned with the welding place from top to bottom.

[0013] As a further improvement of the utility model technical scheme, the outer diameter of the water jet part is smaller than the inner diameter of the heater sleeve.

[0014] As a further improvement of the utility model technical scheme, the tensioning member includes a first abutting platform, and the first abutting platform is in contact with the bottom of the heater sleeve.

[0015] As a further improvement of the utility model technical scheme, the tensioning member further includes a second abutting platform, and the connector is provided with a boss in abutting cooperation with the second abutting platform.

[0016] As a further improvement of the utility model technical scheme, the outer wall of the connector is provided with threads, and the connector is threadedly connected with the nut.

[0017] As a further improvement of the utility model technical scheme, it further includes a first waterproof member, and the first waterproof member is located between the head and the inclined sleeve.

[0018] As a further improvement of the utility model technical scheme, it further includes a second waterproof member, and the second waterproof member is located at the connection between the inclined sleeve and the heater sleeve, and the second waterproof member is in abutting cooperation with the bottom of the inclined sleeve, the outer wall of the head and the top of the heater sleeve respectively.

[0019] Compared with the prior art, the thin-walled pipe and plate asymmetric J-shaped groove welding place cooling water cooling device has the advantages that:

[0020] In the thin-walled pipe and plate asymmetric J-shaped groove welding place cooling water cooling device, the water cooling device is installed on the heater sleeve during welding, the water supply device supplies cooling water from the bottom to the top into the water spraying head through the connecting head and the water supply pipe, and the heater sleeve after welding is cooled through the water spraying head. The water cooling during the welding process can quickly take away the heat generated during the welding process, reduce the residual stress, and increase the cooling speed during the welding process. Not only can the ideal welding joint be obtained by making the weld metal grain fine and uniform, the welding residual stress is small, but also the residence time of the welding joint under high temperature can be reduced, and the welding deformation can be reduced. The thin-walled pipe and plate asymmetric J-shaped groove welding place cooling water cooling device has the characteristics of quickly cooling the heater sleeve of the welding place and preventing welding deformation. BRIEF DESCRIPTION OF DRAWINGS

[0021] The technology of the thin-walled pipe and plate asymmetric J-shaped groove welding place cooling water cooling device will be further described in detail below in combination with the drawings and specific embodiments:

[0022] Fig. 1 is a structural schematic view of the thin-walled pipe and plate asymmetric J-shaped groove welding place cooling water cooling device of the utility model;

[0023] Fig. 2 is a sectional view of the water spraying head in the thin-walled pipe and plate asymmetric J-shaped groove welding place cooling water cooling device of the utility model;

[0024] Fig. 3 is a connection schematic view of the tensioning member and the connecting head in the thin-walled pipe and plate asymmetric J-shaped groove welding place cooling water cooling device of the utility model.

[0025] In the drawings:

[0026] 1, water spraying head; 11, head; 12, water spraying part; 121, through hole;

[0027] 2, inclined sleeve; 3, water passing head; 4, water supply pipe;

[0028] 5, tensioning member; 51, first abutting platform; 52, second abutting platform;

[0029] 6, connecting head; 61, boss;

[0030] 7, first waterproof member; 8, second waterproof member; 9, heater sleeve. DETAILED DESCRIPTION

[0031] The concept, specific structure and generated technical effects of the present application will be clearly and completely described below in combination with the embodiments and the drawings, so as to fully understand the purpose, scheme and effect of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The same reference signs used in the drawings indicate the same or similar parts.

[0032] It should be noted that, unless otherwise specified, when a certain feature is referred to as being "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right and the like used in the present application are only relative to the mutual position relationship of the components of the present application in the drawings.

[0033] Referring to Figs. 1 to 3 A water cooling device for cooling a thin-walled pipe and plate asymmetric J-shaped groove welding position, comprising a water supply device, a water spraying head 1, a slanting sleeve 2, a water passing head 3, a water supply pipe 4, a tensioning piece 5 and a connecting head 6.

[0034] In one embodiment, the slanting sleeve 2 is located above the heater sleeve 9, the water spraying head 1 extends into the heater sleeve 9 after penetrating through the slanting sleeve 2, the water passing head 3 is connected with the water spraying head 1, the water supply pipe 4 is connected with the water passing head 3 and the connecting head 6, the other end of the connecting head 6 is connected with the water supply device, the tensioning piece 5 abuts against the heater sleeve 9, the connecting head 6 abuts against the tensioning piece 5 through a nut, and the connecting head 6 is connected with the water supply device.

[0035] During welding, the water cooling device is installed on the heater sleeve 9, the water supply device supplies cooling water from bottom to top into the water spraying head 1 through the connecting head 6 and the water supply pipe 4, and the water spraying head 1 cools the welded heater sleeve 9. The water cooling during welding can quickly take away the heat generated during welding, reduce the residual stress, and increase the cooling speed during welding. Not only can it obtain an ideal welding joint with fine-grained weld metal, uniform structure and small welding residual stress, but also can reduce the residence time of the welding joint at high temperature and reduce the welding deformation. The water cooling device for cooling a thin-walled pipe and plate asymmetric J-shaped groove welding position has the characteristics of quickly cooling the heater sleeve 9 at the welding position and preventing welding deformation

[0036] In one embodiment, referring to Fig. 2As shown, the water spraying head 1 comprises a head part 11 and a water spraying part 12, the head part 11 is detachably connected with the inclined sleeve 2 through screws, and the water spraying part 12 is located in the heater sleeve. The water spraying part 12 is provided with a plurality of through holes 121, which are communicated between the inside of the water spraying head 1 and the inner wall of the heater sleeve 9. The through holes 121 are inclinedly aligned with the welding position from top to bottom. The outer diameter of the water spraying part 12 is smaller than the inner diameter of the heater sleeve 9. Preferably, the screws are M3*12 countersunk screws, and the connecting position of the head part 11 and the inclined sleeve 2 is further provided with three cylindrical pins.

[0037] In one embodiment, referring to Fig. 3 As shown, the tensioning member 5 comprises a first abutting platform 51, which abuts with the bottom of the heater sleeve 9. The tensioning member 5 further comprises a second abutting platform 52, and the connecting head 6 is provided with a boss 61 which abuts with the second abutting platform 52. The head part 11 of the connecting head 6 is partially located in the tensioning member 5.

[0038] In one embodiment, the outer wall of the connecting head 6 is provided with threads, and the connecting head 6 is threadedly connected with a nut. A gasket is further arranged between the nut and the tensioning member 5.

[0039] In one embodiment, the water cooling device further comprises a first waterproof member 7 and a second waterproof member 8, the first waterproof member 7 is located between the head part 11 and the inclined sleeve 2. The second waterproof member 8 is located at the connecting position of the inclined sleeve 2 and the heater sleeve 9, and abuts with the bottom of the inclined sleeve 2, the outer wall of the head part 11 and the top of the heater sleeve respectively. Preferably, the first waterproof member 7 and the second waterproof member 8 are both O-rings, the specification of the first waterproof member 7 is 19*2.65, and the specification of the second waterproof member 8 is 27.3*3.55.

[0040] In one embodiment, the water supply pipe 4 is welded and fixed at both ends with the water passing head 3 and the connecting head 6 respectively, and the water supply pipe 4 can also be threadedly connected with the water passing head 3 and the connecting head 6 respectively. Preferably, the water supply pipe 4 is a steel pipe with a diameter of 10 mm, a thickness of 2 mm and a length of 382 mm.

[0041] Other contents of the thin-walled pipe and plate asymmetric J-shaped groove welding position cooling water cooling device are referred to the prior art, which will not be repeated here.

[0042] The above is only a preferred embodiment of the present application, and does not limit the present application in any form, so any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical scheme of the present application.

[0043] In addition, the terms "first", "second" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0044] In the utility model, unless otherwise specifically defined and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A water cooling device for reducing the temperature of a thin-walled pipe and plate asymmetric J-type groove welding joint, characterized in that, The utility model relates to a water supply device for a heating device, comprising: a water supply device, a water spraying head, an inclined sleeve, a water passing head, a water supply pipe, a tensioning member and a connecting head; the inclined sleeve is located above a heater sleeve, the water spraying head extends into the heater sleeve after penetrating the inclined sleeve, the water passing head is connected with the water spraying head, the water supply pipe is connected with the water passing head and the connecting head, the other end of the connecting head is connected with the water supply device, the tensioning member is in abutment with the heater sleeve, the connecting head is in abutment with the tensioning member through a nut, and the connecting head is connected with the water supply device.

2. The water cooling device for reducing the temperature of the asymmetric J groove welding joint of the thin-walled pipe and plate according to claim 1, characterized in that, The water spraying head comprises a head part and a water spraying part, the head part is detachably connected with the inclined sleeve through a screw, and the water spraying part is located in the heater sleeve.

3. The water cooling device for reducing the temperature of a thin-walled pipe and plate asymmetric J-type groove welding joint according to claim 2, characterized in that, The water spraying part is provided with a plurality of through holes, and the plurality of through holes are connected with the inside of the water spraying head and the inner wall of the heater sleeve.

4. The water cooling device for cooling the asymmetric J groove welding joint of the thin-walled pipe and plate according to claim 3, characterized in that, The through holes are obliquely aligned with the welding position from top to bottom.

5. The water cooling device for reducing the temperature of a thin-walled pipe and plate asymmetric J-type groove welding joint according to claim 2, characterized in that, The outer diameter of the water spraying part is smaller than the inner diameter of the heater sleeve.

6. The water cooling device for reducing the temperature of a thin-walled pipe and plate asymmetric J-type groove welding joint according to claim 1, characterized in that, The tensioning member comprises a first abutment platform, and the first abutment platform is in abutment with the bottom of the heater sleeve.

7. The water cooling device for reducing the temperature of a thin-walled pipe and plate asymmetric J-type groove welding joint according to claim 1, characterized in that, The tensioning member further comprises a second abutment platform, and the connecting head is provided with a convex platform in abutment with the second abutment platform.

8. The water cooling device for reducing the temperature of a thin-walled pipe and plate asymmetric J-type groove welding joint according to claim 1, characterized in that, The outer wall of the connecting head is provided with a screw thread, and the connecting head is threadedly connected with a nut.

9. The water cooling device for cooling the asymmetric J groove welding joint of the thin-walled pipe and plate according to claim 2, characterized in that, The utility model further comprises a first waterproof member, and the first waterproof member is located between the head part and the inclined sleeve.

10. The water cooling device for reducing the temperature of a thin-walled pipe and plate asymmetric J-type groove welding joint according to claim 2, characterized in that, The utility model further comprises a second waterproof member, and the second waterproof member is located at the connection between the inclined sleeve and the heater sleeve, and the second waterproof member is in abutment with the bottom of the inclined sleeve, the outer wall of the head part and the top of the heater sleeve, respectively.

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