A horizontal rotary clamping device for a variable diameter cylinder and a method for processing a variable diameter cylinder using the same

Abstract

The present invention discloses a horizontal rotary clamping device for a variable diameter cylinder and a method for processing a variable diameter cylinder using the same. The device includes a supporting ring sleeved on the outside of the variable diameter cylinder, and a plurality of retractable clamping mechanisms are arranged on the inside of the supporting ring. The variable diameter cylinder is clamped by the clamping mechanism so that the variable diameter cylinder can rotate synchronously with the supporting ring. The supporting ring is then placed on a roller frame, and the rotating variable diameter cylinder is driven by driving the supporting ring.

Description

Technical Field

[0001] The invention relates to the field of pressure vessel manufacturing, and in particular to a horizontal rolling device for a variable diameter cylinder during the manufacturing process. Background Art

[0002] A reducer is a common type of pressure-bearing cylinder in pressure vessel equipment. By varying the diameter of the cylinder at different locations within the vessel, the internal flow rate and velocity can be effectively controlled based on the reaction principle of the medium. Its structure generally consists of an upper cylinder 71, a lower cylinder 72, and a tapered cylinder 73. Various components are often mounted on the outer wall of the cylinder, such as a pipe 74, a backing plate 75, and an observation hole flange 76. When welding single-section cylinder butt welds and installing cylinder wall components, the reducer must be repeatedly rolled horizontally on a roller frame to adjust its position to meet installation accuracy and welding requirements. Therefore, the reducer rotates frequently on the roller frame. However, due to its structure, the reducer presents the following difficulties in rotation:

[0003] 1. Because the diameters of the two ends of the reducer are different, the height of the roller frame and the distance between the two rollers need to be adjusted according to the diameter difference. The adjustment accuracy is difficult to ensure that the cylinder is completely level. During rotation, it will slowly move toward the lower roller frame. When the cylinder wall parts are close to the roller frame rollers and reducer, there is a risk of collision. Especially when the cylinder is heavy or large, the traditional method cannot guarantee accuracy and safety.

[0004] 2. The reducer needs to install and weld various parts on the wall of the cylinder according to the design structure. When the shape, number and installation position of the parts limit the rotation space of the roller frame, the cylinder will not be able to rotate a full circle normally, which may easily cause the parts to be crushed and damaged;

[0005] 3. The roller of the roller frame is usually made of high-hardness carbon alloy steel. Special materials such as stainless steel and nickel-based materials are not allowed to come into direct contact with carbon steel during manufacturing because they will be corroded by iron ions. Therefore, when manufacturing the cylinder made of special materials, the roller and the cylinder parts need to be isolated. However, the isolation material is easily crushed during frequent rolling and continues to cause pollution.

[0006] Reducer cylinders come in a wide variety of sizes depending on design requirements. To meet production demands, manufacturers often have to equip multiple models of roller racks, which requires significant manpower and time to adjust the height of the racks and the roller guards. Improper adjustments can lead to collisions or even crushing of cylinder parts with the rollers, resulting in significant economic losses. The rollers on the roller racks maintain linear contact with the cylinder. Once the cylinder tilts on the two roller racks, the contact between the cylinder and the rollers shifts to point contact, increasing the roller pressure on the cylinder wall. When the cylinder is heavy, the rotation of the rollers on the rollers can create indentations on the cylinder wall, damaging the surface.

[0007] The above problems are serious quality issues in pressure vessel manufacturing. Once they occur, parts need to be replaced or even the entire cylinder needs to be scrapped. Therefore, the horizontal rotation of the reducer cylinder on the roller frame is a difficult problem that needs to be solved urgently. Summary of the Invention

[0008] In order to overcome the above problems, the inventors have conducted intensive research and designed a horizontal rotary clamping device for a variable diameter cylinder and a method for processing a variable diameter cylinder using the device. The device includes a supporting ring sleeved on the outside of the variable diameter cylinder, and a plurality of retractable clamping mechanisms are provided on the inside of the supporting ring. The clamping mechanism abuts and clamps the variable diameter cylinder so that the variable diameter cylinder can rotate synchronously with the supporting ring. The supporting ring is then placed on a roller frame, and the supporting ring is driven to drive the variable diameter cylinder to rotate, thereby completing the present invention.

[0009] Specifically, the purpose of the present invention is to provide a horizontal rotating clamping device for a reducing cylinder, characterized in that the device includes a supporting ring 1 which is sleeved on the outside of the reducing cylinder 7, and a plurality of retractable clamping mechanisms are arranged on the inside of the supporting ring 1, and the reducing cylinder 7 is abutted and clamped by the clamping mechanism, so that the reducing cylinder 7 can rotate synchronously with the supporting ring 1.

[0010] The device further comprises a roller frame 8 provided at the bottom for supporting the supporting ring 1 ; preferably, the supporting ring 1 can be driven to rotate by the roller frame 8 .

[0011] There are three clamping mechanisms, which are evenly distributed on the inner side of the supporting ring 1 .

[0012] The clamping mechanism includes a screw 2, a crossbeam 3, a support 4, a screw sleeve 5 and a hinge seat 6;

[0013] One end of the lead screw 2 is hinged to the inner side of the support ring 1, and the other end of the lead screw 2 passes through and is fixed on the screw sleeve 5;

[0014] One end of the crossbeam 3 is hinged to the inner side of the support ring 1, and the other end is hinged to the support 4.

[0015] A screw sleeve 5 is rotatably mounted on the support 4 , and the hinge seat 6 is also hinged to the support 4 .

[0016] The hinge seat 6 includes a support body 61, and legs 612 are provided on both sides of the lower end of the support body 61, and the reducing cylinder 7 is abutted and clamped by the legs 612;

[0017] Preferably, the supporting legs 612 on both sides are in linear contact with the reducing cylinder 7 .

[0018] The hinge seat 6 further includes an anti-slip rubber plate 63 , which is wrapped around the outside of the support leg 612 and located between the support leg 612 and the reducing cylinder 7 to prevent the reducing cylinder 7 and the hinge seat 6 from sliding.

[0019] The support angle between the crossbeam 3 and the lead screw 2 is between 90° and 140°.

[0020] The present invention also provides a method for processing a variable diameter cylinder.

[0021] In this method, the variable diameter cylinder is clamped and rotated by the horizontal rotary clamping device of the variable diameter cylinder described above;

[0022] The distance between the hinge seat 6 and the reducer is adjusted by the relative movement between the lead screw 2 and the screw sleeve 5, thereby controlling the hinge seat 6 to abut and clamp the reducer, thereby driving the support ring 1 to rotate to drive the reducer to rotate synchronously.

[0023] The reducer includes an upper cylinder 71, a lower cylinder 72, a cone 73 and parts mounted on the cylinder wall;

[0024] The method comprises the following steps:

[0025] Step 1: Form the upper cylinder 71, the lower cylinder 72 and the cone 73 into single sections, butt-join the three sections and fix them by spot welding;

[0026] Step 2: Mark the outer parts installation positions on the upper cylinder 71, lower cylinder 72 and cone 73, and adjust the circumferential position of the cylinder to prevent the support ring 1 from interfering with the parts installation position during installation; use the pad 91 and jack 92 to simply support the cylinder horizontally so that the cylinder is in a horizontal position;

[0027] Step 3: Confirm the upper cylinder diameter corresponding to the screw extension distance L by calculation, adjust the three sets of screw sleeves 5 to swing the screw 2 outward until the diameter of the cylinder formed by the bottom ends of the three hinge seats 6 is 50-100 mm larger than the upper cylinder diameter, lift the support ring 1, and slowly insert it from the end of the upper cylinder 71 to the installation position. Adjust the three sets of screw sleeves 5 according to the same L value to swing the screw 2 toward the cylinder until the hinge seat 6 clamps the upper cylinder 71 through the non-slip rubber plate 63;

[0028] Step 4: Confirm the diameter of the lower cylinder 72 corresponding to the extension distance L of the lead screw by calculation, and install the clamping device of the lower cylinder 72 in the same way as step 3;

[0029] Step 5, synchronously lift the two supporting rings 1, and place the whole horizontally on the roller frame 8 arranged in advance to realize the horizontal rotation of the reducer 7, and then weld the upper cylinder, lower cylinder and cone annular seam and install and weld the parts of the cylinder outer wall to the optimal position.

[0030] After step 3 is completed, a pad 93 is used to support the support ring 1 and the ground to prevent the upper cylinder end from being overweight and tipping over. Then the jack can be removed, the lifting of the support ring 1 by the overhead crane can be released, and the installation of the clamping device of the upper cylinder 71 can be completed.

[0031] The beneficial effects of the present invention include:

[0032] (1) According to the horizontal rotary clamping device for a variable diameter cylinder and the method for processing a variable diameter cylinder using the same, when the upper cylinder and the lower cylinder of the variable diameter cylinder are stably clamped by three sets of hinge seats and the same screw extension length L is maintained, the two support rings are relatively fixedly connected to the variable diameter cylinder and are coaxial. When the two support rings are placed on the roller frame, the variable diameter cylinder can rotate smoothly.

[0033] (2) According to the horizontal rotary clamping device for a variable diameter cylinder and the method for processing a variable diameter cylinder using the same provided by the present invention, the hinge seat and the variable diameter cylinder only occupy a very small supporting space, and the installation positions of all parts on the cylinder body can be reasonably avoided. Even if the outer wall of the cylinder is non-circular, the hinge seat can stably clamp various positions of the cylinder wall by adjusting the angle between the crossbeam and the lead screw;

[0034] (3) According to the horizontal rotary clamping device for a variable diameter cylinder and the method for processing a variable diameter cylinder using the same provided by the present invention, when the cylinder body is made of special materials such as stainless steel and nickel-based materials, the anti-slip rubber plate installed on the hinge seat can be used for cleaning and isolation, and the cylinder body can be clamped more stably for rotation;

[0035] (4) The horizontal rotation clamping device for the variable diameter cylinder provided by the present invention has high versatility and is applicable to the horizontal rotation of variable diameter cylinders, straight cylinders and non-concentric variable diameter cylinders of various specifications;

[0036] (5) The horizontal rotary clamping device for a variable diameter cylinder provided by the present invention improves the measurement accuracy of the installation position of the parts by adjusting the coaxiality between the cylinder and the support ring through a thread;

[0037] (6) The horizontal rotary clamping device for the variable diameter cylinder provided by the present invention will not limit the full circle rotation of the cylinder due to the structure and number of the cylinder wall parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A three-dimensional schematic diagram showing the horizontal rotary clamping device for the reducing cylinder clamping the reducing cylinder and rotating horizontally;

[0039] Figure 2 A schematic front view showing the horizontal rotary clamping device for the reducing cylinder clamping the reducing cylinder and rotating horizontally;

[0040] Figure 3 A left side schematic diagram showing the horizontal rotary clamping device for the reducing cylinder clamping the reducing cylinder and rotating horizontally;

[0041] Figure 4 Show Figure 2 Middle AA cross-sectional view;

[0042] Figure 5 Shown is a schematic diagram of the structure of the reducer;

[0043] Figure 6 Showing the support ring front view and BB cross-sectional schematic diagram;

[0044] Figure 7 Showing the front view and top view of the screw;

[0045] Figure 8 Showing the front view and top view of the beam;

[0046] Figure 9 Showing the support main view and CC cross-sectional schematic diagram;

[0047] Figure 10 Showing the main view of the screw sleeve and the DD cross-sectional view;

[0048] Figure 11 Showing the hinge seat front view and EE cross-sectional view;

[0049] Figure 12 A schematic diagram showing step 2 in the method for processing a variable diameter cylinder is shown;

[0050] Figure 13 A schematic diagram showing step 3 in the method for processing a variable diameter cylinder is shown;

[0051] Figure 14 A schematic diagram showing step 5 in the reducing cylinder processing method.

[0052] Reference numerals

[0053] 1-Support ring

[0054] 11-Ring plate

[0055] 12-Annular rib plate

[0056] 13-Hanging ear

[0057] 14-Screw connection hole

[0058] 15-Beam connection hole

[0059] 2-Screw

[0060] 21-Screw connecting shaft

[0061] 22-T-shaped long thread

[0062] 3-Beam

[0063] 31-Connecting plate

[0064] 32-rib plate

[0065] 33-Connecting shaft

[0066] 34-Connection through hole

[0067] 4-Support

[0068] 41-screw connection hole

[0069] 42-Beam connecting shaft

[0070] 43-Hinge connection hole

[0071] 5-screw sleeve

[0072] 51-bracket connecting circular groove

[0073] 52-external hexagonal head

[0074] 6-Hinge seat

[0075] 61-Support

[0076] 611-Hinge connecting shaft

[0077] 612-legs

[0078] 62-fastening bolt

[0079] 63-Anti-slip rubber sheet

[0080] 7-Reducing Cylinder

[0081] 71-Upper tube

[0082] 72-lower tube

[0083] 73-cone

[0084] 74-Takeover

[0085] 75-Pad

[0086] 76-Observation hole flange

[0087] 8-Roller rack

[0088] 91-Pad

[0089] 92-Jack

[0090] 93-pad DETAILED DESCRIPTION

[0091] The present invention will be described in further detail below with reference to the accompanying drawings and examples, through which the features and advantages of the present invention will become more clearly understood.

[0092] The word "exemplary" is used exclusively herein to mean "serving as an example, example, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0093] According to the horizontal rotary clamping device of the variable diameter cylinder provided by the present invention, Figure 1 As shown in FIG, the device includes a support ring 1 that is sleeved on the outside of a reducing cylinder 7. A plurality of retractable clamping mechanisms are provided on the inside of the support ring 1. The clamping mechanisms abut and clamp the reducing cylinder 7, allowing the reducing cylinder 7 to rotate synchronously with the support ring 1. The support and rotation of the reducing cylinder 7 can be completed by rotating and supporting the support ring.

[0094] Preferably, the device further comprises a roller frame 8 disposed at the bottom for supporting the support ring 1; preferably, the support ring 1 can also be driven to rotate by the roller frame 8. The roller frame 8 comprises a horizontally placed base and two rollers mounted on the base, the two rollers supporting the support ring, at least one of the rollers being a driving wheel connected to the drive mechanism, and the rotation of the roller drives the support ring to rotate.

[0095] In a preferred embodiment, the horizontal rotary clamping device for the reducing cylinder is provided with two supporting rings 1 , and three clamping mechanisms are provided in each supporting ring 1 , and the three clamping mechanisms are evenly distributed on the inner side of the supporting ring 1 .

[0096] In a preferred embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown in , the clamping mechanism includes a screw 2, a beam 3, a support 4, a screw sleeve 5 and a hinge seat 6;

[0097] One end of the lead screw 2 is hinged to the inner side of the support ring 1, and the other end of the lead screw 2 passes through and is fixed on the screw sleeve 5;

[0098] One end of the crossbeam 3 is hinged to the inner side of the support ring 1, and the other end is hinged to the support 4.

[0099] A screw sleeve 5 is rotatably mounted on the support 4 , and the hinge seat 6 is also hinged to the support 4 .

[0100] More preferably, Figure 6As shown in the figure, the support ring 1 is an annular body with high bearing strength, consisting of a ring plate 11, two annular ribs 12, and a lifting lug 13. The annular rib 12 is fixedly connected to the inner side of the ring plate 11. The two annular ribs 12 are arranged parallel to each other and symmetrically. There are 3 to 4 groups of screw connection holes 14 and crossbeam connection holes 15 evenly distributed around the circumference, preferably 3 groups evenly distributed. The purpose is to provide a larger installation space for cylinder wall parts while ensuring stable support for the cylinder. The lifting lug 13 is used to lift the support ring 1 and insert it into the outer side of the cylinder. The screw connection hole 14 is used for articulation with the screw 2, and the crossbeam connection hole 15 is used for articulation with the crossbeam 3.

[0101] like Figure 7 As shown in the figure, one end of the screw 2 is provided with a T-shaped long thread 22 that bears heavy loads, and the other end is provided with a screw connecting shaft 21; the screw connecting shaft 21 is installed in conjunction with the screw connecting hole 14, so that the screw 2 is hinged to the supporting ring 1; the T-shaped long thread 22 is screwed with the internal thread on the sleeve 5 to control the extension amount of the screw 2 relative to the sleeve 5; when the screw 2 is connected to the supporting ring 1, it can rotate inside the annular rib 12 of the supporting ring, that is, the screw 2 is located between the two annular ribs 12, thereby controlling the sleeve 5 and the support 4 connected to the screw to approach or move away from the supporting ring 1, and further controlling the distance between the hinge seat 6 and the reducer 7.

[0102] like Figure 8 As shown in the figure, the beam 3 is composed of a connecting plate 31, a rib plate 32 and a connecting shaft 33; the connecting plates 31 are provided with two, and when the beam 3 is connected to the support ring 1, it can rotate on the outside of the annular rib plate 12 of the support ring, that is, the two connecting plates 31 are respectively located on the outside of the two annular rib plates 12, and the rib plate 32 is used to connect the two connecting plates 31 to increase the strength of the beam 3; the connecting shaft 33 is installed in cooperation with the beam connecting hole 15, so that the beam 3 is hinged to the support ring 1; a connecting through hole 34 is opened on the connecting plate 31, and the beam 3 is hinged to the support 4 through the connection through hole and the beam connecting shaft 42.

[0103] like Figure 9 As shown in the figure, the support 4 is provided with a circular hole 41 in the middle which is rotatably connected to the screw sleeve, and a crossbeam connecting shaft 42 and a hinge seat connecting hole 43 are provided on the outside; the hinge seat connecting hole 43 is installed in conjunction with the hinge seat connecting shaft 611, so that the support 4 is hinged to the hinge seat 6; the circular hole 41 is sleeved on the outside of the circular groove 51 of the screw sleeve 5, and when the screw sleeve 5 moves along the length direction of the screw 2, the support 4 moves synchronously under the push of the screw sleeve 5.

[0104] like Figure 10As shown in the figure, the inner side of the screw sleeve 5 is provided with an internal thread that cooperates with the screw, and the outer side is provided with a circular groove 51 and an external hexagonal head 52 that are rotatably connected to the support circular hole 41. When the support 4 is installed in the screw sleeve circular groove 51, the support 4 can only rotate in the screw sleeve circular groove 51. By screwing the external hexagonal head 52, the screw sleeve 5 is moved back and forth along the length direction of the screw 2, thereby driving the support 4 to move synchronously.

[0105] like Figure 11 As shown in the figure, the hinge seat 6 includes a support body 61, a fastening bolt 62 and an anti-slip rubber plate 63. The upper end of the support body 61 is provided with a hinge seat connecting shaft 611 connected to the support, and the lower end is provided with double-sided support feet 612, the purpose of which is to be suitable for supporting cylinders of various diameters, and the two support feet 612 are in linear contact with the cylinder, and the support is more stable; a screw hole for connecting the anti-slip rubber plate is provided between the two support feet, and the anti-slip rubber plate 63 is fixed to the support end of the hinge seat 6 by the fastening bolt 62, the purpose of which is to clamp the unbalanced cylinder to prevent sliding with the hinge seat 6 when it rotates, and it can play a role in cleaning and isolating cylinders made of special materials.

[0106] In a preferred embodiment, the screw 2 and the crossbeam 3 are connected to the support ring 1, and the sleeve 5 and the hinge seat 6 are connected to the support 4 and then connected to the crossbeam 3; when the sleeve 5 is screwed into the screw 2, the crossbeam 3 and the screw 2 form a stable triangular support structure on the support ring 1, and the angle between the crossbeam 3 and the screw 2 can be changed by adjusting the stroke of the sleeve 5 on the screw 2, thereby changing the distance from the hinge seat 6 to the center of the support ring 1; the support angle between the crossbeam 3 and the screw 2 is set to between 90° and 140°, and this angle range can provide a more stable bearing capacity and cylinder diameter adjustment space; the larger the angle, the larger the diameter of the clamped cylinder, and the smaller the angle, the smaller the diameter of the clamped cylinder, and the diameter of the corresponding cylinder can be calculated according to the extended length L of the screw.

[0107] When the clamping device is inserted into the outer side of the cylinder, the three sets of screw sleeves 5 are adjusted in the ring to rotate the screw 2 outward to provide sufficient fitting space. The device is inserted from both ends of the reducer 7 and the screw sleeve 5 is adjusted according to the diameter of the clamping position of the cylinder to turn the screw 2 toward the cylinder to the hinge seat 6 to clamp it on the outer wall of the cylinder. When the extension length L of the three sets of screws is adjusted to be equal, the support ring 1 is coaxially fixed to the reducer 7. Placing the two support rings 1 on the roller frame 8 can realize the smooth rotation of the reducer 7 and ensure that the cylinder wall parts do not collide with the roller frame; when the outer contour of the cylinder is non-circular, the shell can still be rotated smoothly on the roller frame 8 by adjusting the angle between each screw 2 and the crossbeam 3.

[0108] The present invention also provides a method for processing a diameter-reducing cylinder, wherein the diameter-reducing cylinder is clamped and rotated by the horizontal rotary clamping device for the diameter-reducing cylinder described above;

[0109] The distance between the hinge seat 6 and the reducer is adjusted by the relative movement between the lead screw 2 and the screw sleeve 5, thereby controlling the hinge seat 6 to abut and clamp the reducer, thereby driving the support ring 1 to rotate to drive the reducer to rotate synchronously.

[0110] like Figure 5 As shown in the figure, the reducer comprises an upper cylinder 71, a lower cylinder 72, a cone 73, and components mounted on the cylinder wall; these components include a pipe 74, a pad 75, and an observation port flange 76. Preferably, the reducer can be the pressure-bearing shell of a nuclear power plant sampling collector. The upper cylinder 71 has a diameter of 1800 mm, the lower cylinder 72 has a diameter of 1300 mm, and the cylinder is constructed of 14 mm thick stainless steel. The manufacturing process for the reducer assembly is as follows: the upper cylinder 71 and lower cylinder 72 are butt-welded to the cone 73, followed by the installation of the cylinder wall components. Multiple pipes 74 and pads 75 are attached to the outer side of the upper cylinder, while a rectangular observation port flange 76 is mounted on the lower cylinder 72. Before installation, mounting holes for each component must be cut into the cylinder wall, followed by installation and welding. The butt-welding of the cylinder requires horizontal rolling welding. The installation and welding of each component must be performed while the cylinder is horizontal to ensure installation accuracy, and the mounting position of each component can be adjusted by rotation. On this basis, the horizontal rotary clamping device for the variable diameter cylinder in this application is selected, and the clamping range is 1100mm~2000mm in diameter. Specifically, the variable diameter cylinder processing method includes the following steps:

[0111] Step 1: Form the upper cylinder 71, the lower cylinder 72 and the cone 73 into single sections, butt-join the three sections and fix them by spot welding;

[0112] Step 2: Mark the outer parts installation position on the upper cylinder 71, lower cylinder 72 and cone 73, and adjust the annular position of the cylinder to avoid interference with the parts installation position when the support ring 1 is installed; after calculating the center of gravity position of the reducer 7, as shown in the following figure: Figure 12 As shown in the figure, the cylinder is simply supported horizontally by using a pier 91 and a jack 92, so that the cylinder is in a horizontal position. The outer diameter of the support ring of the clamping device used in this embodiment is 3000mm, and the pier height is selected to be 1000mm, which can meet the coaxial installation requirements of the support ring 1 and the reducer. The pier and jack are commonly used tools in the workshop, and the support effect is very stable and convenient.

[0113] Step 3: Confirm the upper cylinder diameter corresponding to the screw extension distance L by calculation, adjust the three sets of screw sleeves 5 to swing the screw 2 outward until the diameter of the cylinder surrounded by the bottom ends of the three hinge seats 6 is 50~100mm larger than the upper cylinder diameter, and lift the support ring 1. Figure 13 As shown in , slowly insert the upper cylinder 71 from the end to the installation position, adjust the three sets of screw sleeves 5 according to the same L value so that the screw 2 swings toward the cylinder until the hinge seat 6 clamps the upper cylinder 71 through the anti-slip rubber plate 63;

[0114] After step 3 is completed, a pad 93 is used between the support ring 1 and the ground to prevent the upper cylinder from tilting due to excessive weight. The pad is a common tool in the workshop. The jack can then be removed, the lifting of the support ring 1 by the overhead crane can be released, and the installation of the clamping device of the upper cylinder 71 can be completed. The reducing cylinder 7 is stably supported by the pad at the bottom of the lower cylinder 72 and the clamping device and pad of the upper cylinder 71.

[0115] Step 4: Confirm the diameter of the lower cylinder 72 corresponding to the extension distance L of the lead screw by calculation, and install the clamping device of the lower cylinder 72 in the same way as step 3;

[0116] Step 5, synchronously lift the two supporting rings 1, and place the overall horizontal hoist on the roller frame 8 placed in advance to realize the horizontal rotation of the reducer 7, and then carry out the welding of the upper cylinder, lower cylinder and cone annular seam and the welding of the parts of the outer wall of the cylinder to the optimal position. During the welding process, the installation and welding position of the reducer parts can be rotated and adjusted at any time according to needs. After the continuous operation of cylinder annular seam welding, cylinder body opening and installation of pipes, pads, observation hole flanges and non-destructive testing after welding, the reducer processing is completed, which takes a total of 5 days. During this processing process, the rotation operation of the reducer is convenient and stable, the processing process is smooth, there is no crushing damage, etc., and the accuracy of the reducer finally obtained meets the design requirements.

[0117] The present invention has been described above with reference to preferred embodiments, but these embodiments are merely exemplary and serve only as illustrations. On this basis, various replacements and improvements can be made to the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A horizontal rotary clamping device for a variable diameter cylinder, characterized in that: The variable diameter cylinder is a pressure-bearing shell of a nuclear power plant sampling collector. The device comprises a support ring (1) sleeved on the outside of the variable diameter cylinder (7). A plurality of retractable clamping mechanisms are provided on the inside of the support ring (1). The variable diameter cylinder (7) is clamped by the clamping mechanisms so that the variable diameter cylinder (7) can rotate synchronously with the support ring (1). The clamping mechanism comprises a lead screw (2), a crossbeam (3), a support (4), a screw sleeve (5) and a hinge seat (6); One end of the lead screw (2) is hinged to the inner side of the support ring (1), and the other end of the lead screw (2) passes through and is fixed on the screw sleeve (5); One end of the crossbeam (3) is hinged to the inner side of the support ring (1), and the other end is hinged to the support (4). A screw sleeve (5) is rotatably mounted on the support (4), and the hinge seat (6) is also hingedly connected to the support (4); The hinge seat (6) comprises a support body (61), and support legs (612) are provided on both sides of the lower end of the support body (61), and the diameter reducing cylinder (7) is abutted and clamped by the support legs (612); The supporting feet (612) on both sides are in linear contact with the reducing cylinder (7); The hinge seat (6) further comprises an anti-skid rubber plate (63), which is coated on the outside of the support leg (612) and is located between the support leg (612) and the diameter-changing cylinder (7), thereby preventing the diameter-changing cylinder (7) and the hinge seat (6) from sliding.

2. The horizontal rotary clamping device for a diameter-reducing cylinder according to claim 1, characterized in that: The device further comprises a roller frame (8) arranged at the bottom for supporting the support ring (1), and the support ring (1) is driven to rotate by the roller frame (8).

3. The horizontal rotary clamping device for a diameter-reducing cylinder according to claim 1, characterized in that: Three clamping mechanisms are provided and are evenly distributed on the inner side of the support ring (1).

4. The horizontal rotary clamping device for a diameter-reducing cylinder according to claim 1, characterized in that: The support angle between the crossbeam (3) and the lead screw (2) is between 90° and 140°.

5. A method for processing a variable diameter cylinder, characterized in that: In this method, the reducing cylinder is clamped and rotated by the horizontal rotary clamping device of the reducing cylinder according to any one of claims 1 to 4; The distance between the hinge seat (6) and the reducing cylinder is adjusted by the relative movement between the lead screw (2) and the screw sleeve (5), thereby controlling the hinge seat (6) to abut against and clamp the reducing cylinder, thereby driving the supporting ring (1) to rotate and thereby driving the reducing cylinder to rotate synchronously.

6. The method for processing a diameter-reducing cylinder according to claim 5, characterized in that: The diameter-reducing cylinder comprises an upper cylinder (71), a lower cylinder (72), a cone (73), and parts mounted on the cylinder wall; The method comprises the following steps: Step 1, forming the upper cylinder (71), the lower cylinder (72) and the cone (73) into single sections, butting and mounting the three sections of the cylinder and spot welding them; Step 2: Mark the outer parts installation positions on the upper cylinder (71), the lower cylinder (72) and the cone (73), and adjust the circumferential position of the cylinder to avoid interference with the parts installation position when the support ring 1 is installed; use the pad (91) and the jack (92) to simply support the cylinder horizontally so that the cylinder is in a horizontal state; Step 3, confirm the upper cylinder diameter corresponding to the screw extension distance L by calculation, adjust the three sets of screw sleeves (5) to swing the screw (2) outward until the diameter of the cylinder surrounded by the bottom ends of the three hinge seats (6) is 50~100mm larger than the diameter of the upper cylinder, lift the support ring (1), and slowly insert it from the end of the upper cylinder (71) to the installation position, and adjust the three sets of screw sleeves (5) according to the same L value to make the screw (2) swing toward the cylinder until the hinge seat (6) clamps the upper cylinder (71) through the anti-slip rubber plate (63); Step 4, confirm the diameter of the lower cylinder (72) corresponding to the extension distance L of the lead screw by calculation, and install the clamping device of the lower cylinder (72) in the same way as step 3; Step 5, synchronously lifting the two support rings (1), placing the whole horizontal hoist on the roller frame (8) arranged in advance, realizing the horizontal rotation of the reducer (7), and then welding the upper cylinder, lower cylinder and cone annular seam and welding the parts of the cylinder outer wall to the optimal position.

7. The method for processing a diameter-reducing cylinder according to claim 6, wherein: After step 3 is completed, a pad (93) is used between the support ring (1) and the ground to support the upper cylinder body to prevent the upper cylinder body from being overweight and tipping over. The jack can then be removed, the lifting of the support ring (1) by the overhead crane can be released, and the installation of the clamping device of the upper cylinder body (71) can be completed.

Images