Circular seam heat treatment stability device

Abstract

The utility model discloses a circular seam heat treatment stability device which comprises a plurality of supporting ring plate groups, a plurality of first connecting plates, a plurality of second connecting plates, a plurality of supporting battens, a plurality of shell type heating belts, a plurality of fasteners and a plurality of connecting pieces, each shell type heating belt is supported at the weld joint of the barrel through a supporting ring plate group and surrounds the inner wall of the barrel in the circumferential direction, and the multiple supporting ring plate groups support each shell type heating belt on the inner wall of the barrel through a plurality of first connecting plates and a plurality of second connecting plates; each support ring plate group comprises a first support ring plate and a second support ring plate which are connected in parallel and have the same structure and different diameters, and the shell type heating belt is positioned between the first support ring plate and the cylinder body. The utility model provides a supporting device similar to a wheel structure form according to the diameter of the shell section, the number of the heating belts, the arrangement and control requirements and the thickness of the shell type heating belt, and the shell type heating belt is tightly attached to the inner wall of the shell body through the supporting device.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power heat treatment, in particular to an annular seam heat treatment stability device. Background Art

[0002] During the heat treatment of the closing girth welds of nuclear power pressurizer equipment, large temperature differences often occur at multiple temperature measuring points during local dehydrogenation of the girth welds between the cylinder segments and local stress relief of the closing girth welds, which does not meet the temperature difference requirements of the heat treatment process regulations. In particular, during the stress relief heat treatment, large temperature differences at the temperature measuring points occur at high temperatures (above 500°C) or the heat treatment process cannot be completed due to large temperature differences, which affects product manufacturing quality and production progress.

[0003] Therefore, in order to solve the problem of large temperature difference at the local heat treatment temperature measurement points, it is necessary to develop a ring seam heat treatment stability device to improve the stability of the heat treatment process. Utility Model Content

[0004] One purpose of the present invention is to propose a stabilization device for annular seam heat treatment. The present invention proposes a support device similar to a wheel structure according to the diameter of the cylinder section, the number of heating belts, the layout requirements, and the thickness parameters of the shell heating belt. The shell heating belt is tightly fitted to the inner wall of the cylinder through this support device.

[0005] According to an embodiment of the present invention, a ring seam heat treatment stability device includes multiple support ring plate groups, multiple first connecting plates, multiple second connecting plates, multiple support plate strips, multiple shell heating belts, multiple fasteners and multiple connecting parts. The multiple shell heating belts are distributed in sequence from top to bottom along the length direction on the inner wall of the cylinder. Each shell heating belt is circumferentially surrounded along the inner wall of the cylinder at the weld of the cylinder. The multiple support ring plate groups support each shell heating belt on the inner wall of the cylinder through multiple first connecting plates and multiple second connecting plates. Each support ring plate group includes a first support ring plate and a second support ring plate that are connected in parallel and have the same structure but different diameters. The shell heating belt is located between the first support ring plate and the cylinder. The second support ring plate is arranged The first support ring plate is arranged on the inner circumference of the first support ring plate, and the second support ring plate is provided with a plurality of fasteners along the circumferential direction. Each support plate strip is connected to the fasteners on the first support ring plate and the fasteners on the second support ring plate at the closest distance to form the first support ring plate and the second support ring plate into a double full ring. The first support ring plate and the second support ring plate are both multi-segment arc plates. Adjacent arc plates in the first support ring plate are connected to form a single full ring by the first connecting member. Adjacent arc plates in the second support ring plate are connected to form a single full ring by the first connecting member. The connection position line between the arc plates in the first support ring plate corresponds to the connection position line between the arc plates in the second support ring plate and is connected to form a straight line.

[0006] A first connecting hole is provided at the intersection of the adjacent arc-shaped plate connection position of the first supporting ring plate on the supporting ring plate group and the adjacent arc-shaped plate connection position of the second supporting ring plate; a second connecting plate is fixedly connected to the adjacent first connecting holes on the supporting ring plate group and the second connecting plates are connected end to end to form a polygon; a first connecting plate is fixedly connected to the spaced first connecting holes and the first connecting plates are connected end to end to form a polygon; the arc plates at the head and tail of the first supporting ring plate connected to form a single complete ring are connected through an oblong hole, and the arc plates at the head and tail of the second supporting ring plate connected to form a single complete ring are connected through an oblong hole.

[0007] Preferably, a plurality of second connecting holes are evenly opened on the arc-shaped plates of the first support ring plate and the second support ring plate along their circumference, and fasteners are provided in the second connecting holes. The fasteners of the first support ring plate are connected to the corresponding fasteners of the second support ring plate through support strips, and the support strips are evenly distributed along the circumference of the double full ring on each support ring plate group.

[0008] Preferably, the number of the first connecting holes is ≥9. When the number of the first connecting holes is an odd number, the two first connecting holes of the arc-shaped plates at the head and tail of the first support ring plate and the second support ring plate are unevenly distributed along the circumference of the support ring plate group on the support ring plate group, and the remaining first connecting holes are evenly distributed along the circumference of the support ring plate group on the support ring plate group; when the number of the first connecting holes is an even number, the first connecting holes are evenly distributed along the circumference of the support ring plate group on the support ring plate group; a second connecting member is provided in each first connecting hole, and the second connecting member passes through the first connecting plate and the second connecting plate to be fastened in the first connecting hole, or the second connecting member passes through the second connecting plate to be fastened in the first connecting hole.

[0009] Preferably, the first connecting hole is arranged in the middle position of the circular arc of the double full ring formed by the two supporting ring plates.

[0010] Preferably, the outer diameter of the first support ring plate is determined according to the inner diameter of the cylinder and the thickness of the heating zone, and the inner diameter of the first support ring plate is the same as the outer diameter of the second support ring plate.

[0011] Preferably, each of the support ring plate groups are parallel to each other and have the same structure, and the first connecting member and the second connecting member are bolts.

[0012] Preferably, the weight of a single curved plate in each of the first supporting ring plate and the second supporting ring plate is ≤8 kg.

[0013] Preferably, the fastener includes a connecting screw, a washer and a nut, the washer is arranged on the threaded portion of the connecting screw, one side of the washer contacts the connecting screw, and the other side of the washer contacts the nut.

[0014] Preferably, each of the support ring plate groups is arranged at the position of the shell-type heating belt.

[0015] Preferably, each shell heating band is circumferentially arranged along the inner wall of the cylinder at the cylinder weld; the first support ring plate and the second support ring plate are uniformly provided with a plurality of fasteners along the circumference; the sizes of the arc-shaped plates at the head and the tail of the first support ring plate are different from the size of the single integral ring connected in the middle, and the sizes of the arc-shaped plates at the head and the tail of the first support ring plate are the same; the sizes of the arc-shaped plates at the head and the tail of the second support ring plate are different from the size of the single integral ring connected in the middle, and the sizes of the arc-shaped plates at the head and the tail of the second support ring plate are the same.

[0016] The beneficial effects of the utility model are:

[0017] The annular seam heat treatment stability device has the advantages that the structure is simple, the device is convenient to install in a small-diameter narrow space, the shell heating band can be tightly pressed against the inner wall of the cylinder during the whole heat treatment operation process, the shell heating band is tightly attached to the inner wall of the cylinder and cannot be loosened, the adjustable fixing device can be adjusted according to the inner diameter of the cylinder segment, all the heating bands can be tightly attached to the inner wall of the workpiece, the temperature difference caused by loosening of the heating bands can meet the process requirements, and the device is stable and reliable in a space temperature of 100-250 DEG C.

[0018] The device is convenient to assemble at room temperature, the shell heating band is fixed through the annular seam heat treatment stability device at room temperature, the support ring plates are pried open through the first connecting plates between the support ring plates to ensure that the shell heating band can be tightly attached to the inner wall of the cylinder, then the support ring plates are assembled and fixed into two rings through the second connecting plates and the bolts, the two rings are connected into one body through the connecting screws between the two rings to form a support structure similar to a wheel structure, and the support strength in the main stress direction (the vertical direction) is improved through the support strips between the upper connecting screw and the lower connecting screw. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the utility model, constitute a part of the specification and are used together with the embodiments of the utility model to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

[0020] Figure 1 A structure diagram of the annular seam heat treatment stability device is provided for the utility model;

[0021] Figure 2 A position relationship diagram of the annular seam heat treatment stability device, the cylinder and the heating band is provided for the utility model.

[0022] Reference signs:

[0023] 1-first supporting ring plate; 2-first connecting plate; 3-supporting plate strip; 4-second connecting plate; 5-connecting screw; 6-washer; 7-nut; 8-shell heating belt; 9-first connecting hole; 10-second connecting hole; 11-second supporting ring plate. DETAILED DESCRIPTION

[0024] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0025] refer to Figure 1 and 2 , a ring seam heat treatment stability device, including multiple support ring plate groups, multiple first connecting plates 2, multiple second connecting plates 4, multiple support plate strips 3, multiple shell heating belts 8, multiple fasteners and multiple connecting parts, multiple shell heating belts 8 are distributed in sequence from top to bottom along the length direction on the inner wall of the cylinder, each shell heating belt 8 is circumferentially surrounded at the cylinder weld seam, the multiple support ring plate groups support each shell heating belt 8 on the inner wall of the cylinder through multiple first connecting plates 2 and multiple second connecting plates 4, each support ring plate group includes a first support ring plate 1 and a second support ring plate 11 connected in parallel and having the same structure but different diameters, the shell heating belt 8 is located between the first support ring plate 1 and the cylinder, and the second support ring plate 11 is arranged on the first support ring The inner circumference of the plate 1, the first support ring plate 1 and the second support ring plate 11 are both provided with a plurality of fasteners along the circumferential direction, and each support plate strip 3 forms the first support ring plate 1 and the second support ring plate 11 into a double full ring by connecting the fasteners on the first support ring plate 1 and the fasteners on the second support ring plate 11 at the closest distance, and the first support ring plate 1 and the second support ring plate 11 are both multi-segment arc-shaped plates, and the adjacent arc-shaped plates in the first support ring plate 1 are connected into a single full ring by the first connecting member, and the adjacent arc-shaped plates in the second support ring plate 11 are connected into a single full ring by the first connecting member, and the connection position line between the arc-shaped plates in the first support ring plate 1 corresponds to the connection position line between the arc-shaped plates in the second support ring plate 11 and are connected into a straight line;

[0026] A first connecting hole 9 is provided at the intersection of the adjacent arc-shaped plate connection positions of the first support ring plate 1 on the support ring plate group and the adjacent arc-shaped plate connection positions of the second support ring plate 11. The second connecting plates 4 are fixedly connected to the adjacent first connecting holes 9 on the support ring plate group, and the second connecting plates 4 are connected end to end to form a polygon. The first connecting plates 2 are fixedly connected to the spaced first connecting holes 9, and the first connecting plates 2 are connected end to end to form a polygon. The arc plates at the head and tail of the first support ring plate 1 connected into a single complete ring are connected through an oblong hole, and the arc plates at the head and tail of the second support ring plate 11 connected into a single complete ring are connected through an oblong hole.

[0027] Preferably, a plurality of second connection holes 10 are evenly opened on the arc-shaped plates of the first support ring plate 1 and the second support ring plate 11 along their circumference, and fasteners are provided in the second connection holes 10. The fasteners of the first support ring plate 1 are connected to the fasteners of the corresponding second support ring plate 11 through support strips 3, and the support strips 3 are evenly distributed along the circumference of the double full ring on each support ring plate group.

[0028] Support strips are installed between the gaps to overcome the excessive gap between the arc plates after the outer diameter of the adjustment ring meets the requirements.

[0029] Preferably, the number of the first connecting holes 9 is ≥9. When the first connecting holes 9 is an odd number, the two first connecting holes 9 of the arc-shaped plates at the head and tail of the first support ring plate 1 and the second support ring plate 11 are unevenly distributed along the circumference of the support ring plate group on the support ring plate group, and the remaining first connecting holes 9 are evenly distributed along the circumference of the support ring plate group on the support ring plate group; when the first connecting holes are an even number, the first connecting holes are evenly distributed along the circumference of the support ring plate group on the support ring plate group; a second connecting member is provided in each first connecting hole, and the second connecting member passes through the first connecting plate and the second connecting plate to be fastened in the first connecting hole, or the second connecting member passes through the second connecting plate to be fastened in the first connecting hole; a second connecting member is provided in each first connecting hole 9, and the second connecting member passes through the first connecting plate 2 and the second connecting plate 4 to be fastened in the first connecting hole 9, or the second connecting member passes through the second connecting plate 4 to be fastened in the first connecting hole 9.

[0030] The first connecting plate 2 and the second connecting plate 4 are both provided with threaded holes corresponding to the first connecting holes 9, and bolts pass through the first connecting plate 2 and the second connecting plate 4 and are fastened in the first connecting holes 9;

[0031] Preferably, the first connection hole 9 is provided in the middle of the circular arc of the double full ring formed by the two supporting ring plates 1 .

[0032] Preferably, the outer diameter of the first support ring plate 1 is determined according to the inner diameter of the cylinder and the thickness of the heating zone, and the inner diameter of the first support ring plate 1 is the same as the outer diameter of the second support ring plate 11 .

[0033] The calculation formula of the outer diameter of the first supporting ring plate 1 is:

[0034] φFirst support ring plate=φInner diameter of cylinder-2δHeating belt thickness+Gap between heating belt and cylinder wall (≤10mm)

[0035] The number of ring plates can be controlled according to the number of heating belts and the weight of each piece.

[0036] Preferably, each of the support ring plate groups are parallel to each other and have the same structure; the first connecting member and the second connecting member are bolts.

[0037] Preferably, the weight of each of the first supporting ring plates (1) and the single curved plate in the first supporting ring plate (1) is ≤8 kg.

[0038] The weight of a single curved plate is controlled within 8kg to facilitate the operator to carry and install it.

[0039] Example 2

[0040] Preferably, the fastener includes a connecting screw 5 , a washer 6 and a nut 7 , the washer 6 is arranged on the threaded portion of the connecting screw 5 , one side of the washer 6 contacts the connecting screw 5 , and the other side of the washer 6 contacts the nut 7 .

[0041] Preferably, each of the support ring plate groups is arranged at the position of the shell-type heating belt 8.

[0042] Preferably, each shell heating belt 8 is circumferentially wrapped around the inner wall of the cylinder at the weld seam of the cylinder; the first support ring plate 1 and the second support ring plate 11 are evenly provided with multiple fasteners along the circumference; the size and specifications of each of the arc plates in the first support ring plate 1 are the same; the size and specifications of the arc plates at the head and tail of the first support ring plate 1 are different from the size and specifications of the arc plates connected in the middle to form a single whole ring, and the size and specifications of the arc plates connected in the first support ring plate 1 between the head and tail are the same; the size and specifications of the arc plates at the head and tail of the second support ring plate 11 are different from the size and specifications of the arc plates connected in the middle to form a single whole ring, and the size and specifications of the arc plates connected in the second support ring plate 11 between the head and tail are the same.

[0043] The size of the arc plate in the first support ring plate 1 is determined according to the inner diameter of the cylinder, the thickness of the heating belt and the gap between the heating belt and the cylinder wall. The second support ring plate 11 is connected to form a single ring according to the size of the arc plate in the first support ring plate 1. The size of the arc plate of the second support ring plate 11 is connected to form a single ring. The assembly process of this utility model is as follows:

[0044] First install the heating belt at the lower end of the cylinder, the lower end curved plate, the first connecting plate, the second connecting plate and the connecting screws, and then rotate the cylinder section axially through the roller frame. During the rotation, assemble the remaining heating belts, curved plate, the first connecting plate, the second connecting plate and the connecting screws, and install support strips in the process; check the tightness of the connection. If it needs to be tightened, adjust the position of the lower end support ring plate group and add support strips between the first support ring plate and the second support ring plate so that the entire device can tighten the heating belt to ensure that the heating belt is in close contact with the cylinder wall, and then tighten the connecting bolts.

[0045] The utility model supports the support ring plate by arranging a first connecting plate and a second connecting plate to ensure that the shell-type heating belt can be tightly attached to the inner wall of the cylinder. The supporting device is reinforced by the supporting strips installed between the two connecting screws. The entire device is assembled to form a wheel-type structure. This structural form has strong stability and a simple structural design. It is easy to install in a small space with a small diameter, ensuring that the shell-type heating belt is tightly attached to the inner wall of the cylinder and does not get loose.

[0046] During the local dehydrogenation of the girth welds between the cylinder sections and the local stress relief of the closed girth welds in nuclear power pressurizer equipment, large temperature differences often occur at multiple temperature measurement points. The main reasons for the large temperature differences include the loosening of individual thermocouple fixtures after heating; the loosening of supporting fixtures after heating, resulting in the inability of the heating belt to fit tightly against the workpiece wall; and the failure of the temperature control instrument.

[0047] If the heating belt is not in close contact with the inner wall of the workpiece or the gap is too large (more than 20mm), the workpiece wall temperature measured by the thermocouple used for temperature control will rise slower due to air convection than the workpiece wall temperature where the heating belt is in close contact, resulting in a gradual temperature difference between the temperature of this part and other parts where the heating belt is in close contact, and the temperature difference may even exceed the range required by the process.

[0048] A circumferential seam heat treatment stability device is an adjustable fixing device that can be adjusted to a certain extent according to the inner diameter of the cylinder section to ensure that all heating belts are in close contact with the inner wall of the workpiece. From the perspective of heating belt fixation, it solves the problem that the temperature difference does not meet the process requirements (the process requires a temperature difference of ±13°C) due to the loosening of the heating belt.

[0049] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for stabilizing annular seam heat treatment, characterized in that: The invention comprises a plurality of support ring plate groups, a plurality of first connecting plates (2), a plurality of second connecting plates (4), a plurality of support plate strips (3), a plurality of shell heating belts (8), a plurality of fasteners and a plurality of connecting parts. The plurality of shell heating belts (8) are sequentially distributed along the length direction from top to bottom on the inner wall of the cylinder. Each shell heating belt (8) is supported at the weld of the cylinder by the support ring plate group and is circumferentially surrounded along the inner wall of the cylinder. The plurality of support ring plate groups support each shell heating belt (8) on the inner wall of the cylinder through the plurality of first connecting plates (2) and the plurality of second connecting plates (4). Each support ring plate group comprises a first support ring plate (1) and a second support ring plate (11) which are connected in parallel and have the same structure but different diameters. The shell heating belt (8) is located between the first support ring plate (1) and the cylinder. The second support ring plate (11) is arranged on the first support ring plate ( 1), the first support ring plate (1) and the second support ring plate (11) are both provided with a plurality of fasteners along the circumferential direction, each support plate strip (3) is connected to the first support ring plate (1) and the second support ring plate (11) by fasteners on the closest support ring plate (1) and fasteners on the second support ring plate (11) to form a double full ring, the first support ring plate (1) and the second support ring plate (11) are both multi-segment arc plates, adjacent arc plates in the first support ring plate (1) are connected to form a single full ring by a first connecting piece, adjacent arc plates in the second support ring plate (11) are connected to form a single full ring by a first connecting piece, and the connection position line between the arc plates in the first support ring plate (1) corresponds to the connection position line between the arc plates in the second support ring plate (11) and is connected to form a straight line; A first connecting hole (9) is provided at the intersection of the adjacent arc-shaped plate connecting positions of the first supporting ring plate (1) and the adjacent arc-shaped plate connecting positions of the second supporting ring plate (11) on the supporting ring plate group; a second connecting plate (4) is fixedly connected to the adjacent first connecting holes (9) on the supporting ring plate group, and the second connecting plates (4) are connected head to tail to form a polygon; a first connecting plate (2) is fixedly connected to the spaced first connecting holes (9), and the first connecting plates (2) are connected head to tail to form a polygon; the arc-shaped plates at the head and tail of the first supporting ring plate (1) connected to form a single complete ring are connected through an oblong hole, and the arc-shaped plates at the head and tail of the second supporting ring plate (11) connected to form a single complete ring are connected through an oblong hole.

2. The annular seam heat treatment stabilization device according to claim 1, characterized in that: A plurality of second connection holes (10) are uniformly provided on the arc-shaped plates of the first support ring plate (1) and the second support ring plate (11) along their circumferences, and fasteners are provided in the second connection holes (10). The fasteners of the first support ring plate (1) are connected to the corresponding fasteners of the second support ring plate (11) through support strips (3), and the support strips (3) are uniformly distributed along the circumference of the double full ring on each support ring plate group.

3. The annular seam heat treatment stabilization device according to claim 1, characterized in that: The number of the first connection holes (9) is ≥9. When the number of the first connection holes (9) is an odd number, two first connection holes (9) of the arc-shaped plates at the head and tail of the first support ring plate (1) and the second support ring plate (11) are unevenly distributed along the circumference of the support ring plate group on the support ring plate group, and the remaining first connection holes (9) are evenly distributed along the circumference of the support ring plate group on the support ring plate group; when the number of the first connection holes (9) is even, the first connection holes (9) are evenly distributed along the circumference of the support ring plate group on the support ring plate group; a second connection piece is provided in each first connection hole (9), and the second connection piece passes through the first connection plate (2) and the second connection plate (4) and is fastened in the first connection hole (9), or the second connection piece passes through the second connection plate (4) and is fastened in the first connection hole (9).

4. The annular seam heat treatment stabilization device according to claim 1, characterized in that: The first connecting hole (9) is arranged in the middle of the circular arc of the double full ring formed by the two supporting ring plates (1).

5. The annular seam heat treatment stabilization device according to claim 1, characterized in that: The outer diameter of the first support ring plate (1) is determined according to the inner diameter of the cylinder, the thickness of the heating belt and the gap between the heating belt and the cylinder wall. The inner diameter of the first support ring plate (1) is the same as the outer diameter of the second support ring plate (11).

6. The annular seam heat treatment stabilization device according to claim 1, characterized in that: Each of the support ring plate groups is parallel to each other and has the same structure; the first connecting member and the second connecting member are bolts.

7. The annular seam heat treatment stabilization device according to claim 1, characterized in that: The weight of a single curved plate in each of the first supporting ring plate (1) and the second supporting ring plate (11) is ≤8 kg.

8. The annular seam heat treatment stabilization device according to claim 1, characterized in that: The fastener comprises a connecting screw (5), a washer (6) and a nut (7), wherein the washer (6) is arranged on the threaded portion of the connecting screw (5), one side of the washer (6) contacts the connecting screw (5), and the other side of the washer (6) contacts the nut (7).

9. The annular seam heat treatment stabilization device according to claim 1, characterized in that: Each supporting ring plate group is arranged at the position of the shell-type heating belt (8).

10. The annular seam heat treatment stabilization device according to claim 1, characterized in that: Each shell-type heating belt (8) is wound around the inner wall of the cylinder at the weld seam of the cylinder; the first support ring plate (1) and the second support ring plate (11) are both evenly provided with a plurality of fasteners along the circumference; the size specifications of the arc plates at the head and tail of the first support ring plate (1) are different from the size specifications of the arc plates connected to form a single ring in the middle, and the size specifications of the arc plates connected to form a single ring between the head and tail of the first support ring plate (1) are the same; the size specifications of the arc plates at the head and tail of the second support ring plate (11) are different from the size specifications of the arc plates connected to form a single ring in the middle, and the size specifications of the arc plates connected to form a single ring between the head and tail of the second support ring plate (11) are the same.

Images