Steam generator shell polishing device

Abstract

The utility model discloses a steam generator shell polishing device which comprises a base, a protruding machining table is arranged in the middle of the base, clamping mechanisms are arranged on the base and located on the two sides of the machining table, a shell is fixed to the machining table through the clamping mechanisms, stand columns are connected to the four corners of the machining table, and a top plate is connected to the stand columns. A plurality of hydraulic cylinders are arranged on the top plate, and the lower end of each hydraulic cylinder is connected with a polishing device; the polishing device comprises a barrel with an opening in the bottom, a rotary disc is rotationally connected into the barrel through a rotary bearing, a plurality of sleeves are connected to the periphery of the bottom face of the rotary disc, telescopic rods are connected into the sleeves through elastic pieces, pistons are connected to the inner ends of the telescopic rods, polishing heads are detachably connected to the outer ends of the telescopic rods, and all the sleeves are located on the same circumference. A driving mechanism for driving the turntable to rotate is arranged at the upper part in the barrel. The grinding device can drive all the grinding heads to rotate synchronously so as to grind the weld joints and grind the weld joints which are not in the same plane, and the grinding efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding devices, in particular to a grinding device for a steam generator shell. Background Art

[0002] A steam generator is a mechanical device that uses the thermal energy of fuel or other energy sources to heat water into hot water or steam. After searching, it was found that the Chinese utility model patent with the authorization publication number CN214468520U discloses a steam generator. From its specification, it can be seen that the steam generator has a shell, and the shell is welded with an air inlet or outlet.

[0003] In the case (such as Figure 5 During the processing (as shown in the figure), the pipe needs to be welded to the shell. Since there is a weld at the welding position and the surface is not smooth, the weld needs to be polished. However, since the shell is cylindrical, the welding position is circular, and the circle is not on the same plane, the weld is usually polished by a manual handheld polishing device, resulting in low polishing efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a steam generator shell polishing device to solve the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A steam generator shell grinding device comprises a base, a protruding processing table is provided in the middle of the base, clamping mechanisms are provided on both sides of the processing table on the base, the shell is fixed on the processing table by the clamping mechanisms, four corners of the processing table are connected with columns, a top plate is connected to the columns, a plurality of hydraulic cylinders are provided on the top plate, and the lower end of each hydraulic cylinder is connected to the grinding device; the grinding device comprises a cylinder with an opening at the bottom, a turntable is rotatably connected to the cylinder through a rotating bearing, a plurality of sleeves are connected to the periphery of the bottom surface of the turntable, a telescopic rod is connected to the sleeve through an elastic member, the inner end of the telescopic rod is connected to a piston, the outer end of the telescopic rod is detachably connected to a grinding head, all the sleeves are located on the same circumference, and a driving mechanism for driving the turntable to rotate is provided at the upper part of the cylinder.

[0007] Preferably, the clamping mechanism includes two bearing seats connected to the base and located on one side of the processing table, a screw rod rotatably connected to the two bearing seats, a guide rail provided on the base and located on both sides of the screw rod, a first motor provided at the end of the base and transmission-connected to the screw rod, a slide seat is slidably connected to the guide rail, the slide seat is slidably connected to the guide rail, and the clamping mechanism also includes a positioning block connected to the slide seat and a pressure plate connected to the periphery of the positioning block.

[0008] Through the above technical solution, the shell is placed on the bearing platform, and the two clamping mechanisms work to clamp the two ends of the shell to keep the shell stable.

[0009] Preferably, the elastic member includes a first spring connected to the top of the sleeve and a second spring sleeved on the periphery of the telescopic rod, the lower end of the first spring is connected to the top of the piston, the upper end of the second spring is connected to the bottom of the piston, and the lower end of the second spring is connected to the bottom of the sleeve.

[0010] Through the above technical solution, by providing the first spring and the second spring, under the joint action of the two, the elastic force is increased, and the grinding head can be in close contact with the welding point, so as to facilitate grinding.

[0011] Preferably, the grinding head includes a connecting sleeve, a cover shell connected to the bottom of the connecting sleeve, and a spherical grinding stone movably connected to the inside of the cover shell, two-thirds of the spherical grinding stone is located in the cover shell, and the connecting sleeve is threadedly connected to the lower end of the telescopic rod.

[0012] Through the above technical solution, the grinding stone is spherical and slidably connected in the cover shell, which is conducive to the movement of the grinding stone along the weld.

[0013] Preferably, the driving mechanism is a second motor disposed in the cylinder, a transmission shaft connected to the second motor via a coupling, and the lower end of the transmission shaft is connected to the turntable.

[0014] Through the above technical solution, the second motor works to drive the transmission shaft to rotate, and the transmission shaft drives the turntable to rotate, thereby driving all the grinding stones to rotate, achieving a better grinding effect.

[0015] Preferably, guide rods are movably connected to both sides of the hydraulic cylinder on the top plate, and the lower ends of the guide rods are connected to the corresponding cylinders.

[0016] Through the above technical solution and the setting of the guide rod, the stability of the cylinder lifting can be increased.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] After the pipeline is welded to the shell of the steam generator, the shell is placed on the processing table with the pipeline facing upward. The shell is clamped by two clamping mechanisms, and then the hydraulic cylinder is controlled to extend to drive the cylinder to move downward so that the cylinder is sleeved on the periphery of the pipeline. Through the action of the elastic member, the telescopic rod moves in the sleeve so that all the grinding heads are in contact with the weld. Then the turntable is driven to rotate by the driving mechanism to drive all the grinding heads to rotate synchronously to grind the weld, thereby realizing the grinding of welds on non-same planes without manual grinding, thereby improving the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 A cross-sectional view of the grinding device during grinding;

[0021] Figure 3 This is a bottom view of the turntable;

[0022] Figure 4 It is a schematic diagram of a sleeve, a telescopic rod, an elastic member and a grinding head;

[0023] Figure 5 is a schematic diagram of a steam generator housing;

[0024] In the figure: 1-base, 2-processing table, 3-hydraulic cylinder, 4-grinding device, 401-cylinder, 402-turntable, 403-sleeve, 404-telescopic rod, 405-first spring, 406-second spring, 407-connecting sleeve, 408-cover, 409-grinding stone, 410-second motor, 5-bearing seat, 6-screw rod, 7-guide rail, 8-first motor, 9-slide seat, 10-positioning block, 11-pressing plate, 12-guide rod, 13-housing, 14-pipeline. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Example 1

[0027] See also Figure 1 A steam generator shell polishing device includes a base 1, a protruding processing table 2 is provided in the middle of the base 1, and a clamping mechanism is provided on both sides of the processing table on the base 1, and the shell is fixed on the processing table 2 by the clamping mechanism, and the clamping mechanism includes two bearing seats 5 connected to the base and located on one side of the processing table, a screw rod 6 rotatably connected to the two bearing seats, a guide rail 7 provided on the base and located on both sides of the screw rod, and a first motor 8 provided at the end of the base and connected to the screw rod in a transmission manner, a slide seat 9 is slidably connected to the guide rail 7, and the slide seat 9 is slidably connected to the guide rail 7, and the clamping mechanism also includes a positioning block 10 connected to the slide seat and a pressure plate 11 connected to the periphery of the positioning block. The shell is hollow. When the shell is placed on the processing table 2, the first motor 8 is started to drive the screw rod 6 to rotate. During the rotation of the screw rod 6, the slide seat 9 is driven to move toward the processing table 2 until the end of the positioning block 10 is inserted into the shell, and until the pressure plate 11 abuts against the end face of the shell, thereby fixing the shell.

[0028] like Figure 2 , Figure 3 , Figure 4 As shown, the four corners of the processing table 2 are connected with columns, and a top plate is connected to the columns. A plurality of hydraulic cylinders 3 are arranged on the top plate, and a grinding device 4 is connected to the lower end of each hydraulic cylinder 3; the grinding device 4 comprises a cylinder 401 with an opening at the bottom, a turntable 402 is rotatably connected to the cylinder 401 through a rotary bearing, a plurality of sleeves 403 are connected to the periphery of the bottom surface of the turntable 402, a telescopic rod 404 is connected to the sleeve 403 through an elastic member, the inner end of the telescopic rod 404 is connected to a piston, and a grinding head is detachably connected to the outer end of the telescopic rod 404. The elastic member comprises a first spring 405 connected to the top of the sleeve, and a second spring 406 sleeved on the periphery of the telescopic rod, the lower end of the first spring 405 is connected to the top of the piston, the upper end of the second spring 406 is connected to the bottom of the piston, and the lower end of the second spring 406 is connected to the bottom of the sleeve. When the telescopic rod 404 is not squeezed, the first spring 405 and the second spring 406 are in a natural state. At this time, the grinding head is located on the outside of the cylinder 401. When the grinding head contacts the weld, when the hydraulic cylinder 3 is extended, the grinding head squeezes the telescopic rod 404, causing the telescopic rod 404 to move into the sleeve 403, and squeezes the first spring 405 and the second spring 406 at the same time. However, since two sets of springs are provided, the grinding head can be well brought into contact with the weld under the joint action of the first spring 405 and the second spring 406.

[0029] In this embodiment, all sleeves 403 are located on the same circumference, and a driving mechanism for driving the rotating disk 402 is provided at the upper part of the cylinder 401. The driving mechanism is a second motor 410 disposed in the cylinder, a transmission shaft connected to the second motor through a coupling, and the lower end of the transmission shaft is connected to the rotating disk 402. When the second motor 410 is started, the rotating disk 402 can be driven to rotate, thereby driving all the grinding heads to rotate.

[0030] In this embodiment, the grinding head includes a connecting sleeve 407, a cover 408 connected to the bottom of the connecting sleeve, and a spherical grinding stone 409 movably connected to the inside of the cover. The outer surface of the grinding stone 409 is rough, and two-thirds of the grinding stone 409 is located in the cover 408. The connecting sleeve 407 is threadedly connected to the lower end of the telescopic rod 404. The connecting sleeve is threadedly connected to the telescopic rod, which is convenient for replacing the grinding head, and the grinding stone is spherical and slidably connected to the cover, which is conducive to the movement of the grinding stone along the weld.

[0031] The working principle of this embodiment is as follows: after the pipeline 14 is welded to the shell 13 of the steam generator, the shell 13 is placed on the processing table 2, the pipeline 14 is arranged upward, the shell is clamped by two clamping mechanisms, and then the hydraulic cylinder 3 is controlled to extend to drive the cylinder 401 to move downward, so that the cylinder 401 is sleeved on the periphery of the pipeline, and the telescopic rod 404 is moved in the sleeve 403 through the action of the elastic member, so that all the grinding stones 409 are in contact with the weld, and then the turntable 402 is driven to rotate by the driving mechanism, driving all the grinding stones 409 to rotate synchronously to grind the weld, thereby realizing the grinding of welds on non-same planes, without the need for manual grinding, and improving the grinding efficiency.

[0032] It should be noted that, since the hydraulic cylinder is fixed on the top plate, the present application is applicable to grinding the same type of shell, that is, the length of the shell and the position of the pipe welded on the shell are fixed, so that the cylinder can be accurately sleeved on the periphery of the pipe. Of course, a horizontal displacement mechanism, such as a screw transmission mechanism, can also be set on the top plate, and the hydraulic cylinder is installed on the horizontal displacement mechanism, and the position of the grinding device is adjusted by the horizontal displacement mechanism to align the cylinder with the pipe.

[0033] Example 2

[0034] On the basis of Example 1, guide rods 12 are movably connected on both sides of the hydraulic cylinder on the top plate, and the lower ends of the guide rods 12 are connected to the corresponding cylinders 401. The arrangement of the guide rods can increase the stability of the cylinder lifting.

[0035] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steam generator shell polishing device, characterized in that: The invention comprises a base (1), a protruding processing table (2) is provided in the middle of the base (1), clamping mechanisms are provided on both sides of the processing table on the base (1), and the housing is fixed on the processing table (2) through the clamping mechanisms, and columns are connected to the four corners of the processing table (2), and a top plate is connected to the columns, and a plurality of hydraulic cylinders (3) are provided on the top plate, and the lower end of each hydraulic cylinder (3) is connected to a grinding device (4); The grinding device (4) comprises a cylinder (401) with an opening at the bottom, a turntable (402) being rotatably connected in the cylinder (401) via a rotary bearing, a plurality of sleeves (403) being connected to the periphery of the bottom surface of the turntable (402), a telescopic rod (404) being connected in the sleeve (403) via an elastic member, a piston being connected to the inner end of the telescopic rod (404), a grinding head being detachably connected to the outer end of the telescopic rod (404), all the sleeves (403) being located on the same circumference, and a driving mechanism for driving the turntable (402) to rotate being provided in the upper part of the cylinder (401).

2. A steam generator shell polishing device according to claim 1, characterized in that: The clamping mechanism comprises two bearing seats (5) connected to the base and located on one side of the processing table, a screw (6) rotatably connected to the two bearing seats, a guide rail (7) arranged on the base and located on both sides of the screw, and a first motor (8) arranged at the end of the base and connected to the screw in a transmission manner. A slide seat (9) is slidably connected to the guide rail (7), and the slide seat (9) is slidably connected to the guide rail (7). The clamping mechanism also comprises a positioning block (10) connected to the slide seat and a pressure plate (11) connected to the periphery of the positioning block.

3. A steam generator shell polishing device according to claim 2, characterized in that: The elastic member comprises a first spring (405) connected to the top of the sleeve and a second spring (406) sleeved on the periphery of the telescopic rod, the lower end of the first spring (405) is connected to the top of the piston, the upper end of the second spring (406) is connected to the bottom of the piston, and the lower end of the second spring (406) is connected to the bottom of the sleeve.

4. A steam generator shell polishing device according to claim 3, characterized in that: The grinding head comprises a connecting sleeve (407), a cover shell (408) connected to the bottom of the connecting sleeve, and a spherical grinding stone (409) movably connected to the inside of the cover shell. Two thirds of the grinding stone (409) is located in the cover shell (408). The connecting sleeve (407) is threadedly connected to the lower end of the telescopic rod (404).

5. A steam generator shell polishing device according to claim 4, characterized in that: The driving mechanism is a second motor (410) disposed in the cylinder, a transmission shaft connected to the second motor via a coupling, and the lower end of the transmission shaft is connected to the rotating disk (402).

6. A steam generator shell polishing device according to any one of claims 2 to 5, characterized in that: Guide rods (12) are movably connected to the top plate on both sides of the hydraulic cylinder, and the lower ends of the guide rods (12) are connected to the corresponding cylinders (401).

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