CN214218811U

CN214218811U - Local heat treatment device for flange lifting lug of large hydraulic cylinder

Info

Publication number: CN214218811U
Application number: CN202022556398.0U
Authority: CN
Inventors: 蔡剑峰; 丁玲
Original assignee: Changzhou Coating Technology Co ltd
Current assignee: Changzhou Coating Technology Co ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-09-17
Anticipated expiration: 2030-11-06

Abstract

The utility model provides a local heat treatment device of large-scale pneumatic cylinder flange lug, including fixed frock, heating device and heat preservation device, heating device includes terminal surface heating plate and circumference heating plate, and the heat preservation device includes interior week heat preservation cotton, periphery heat preservation cotton, terminal surface heat preservation cotton and lug heat preservation cotton, and fixed frock then the crimping is outside terminal surface heat preservation cotton, and fixed frock and terminal surface heat preservation cotton go up still the fretwork have stretch out the hole, and the lug stretches out from stretching out the hole, and lug heat preservation cotton outsourcing is on the lug surface of fixed frock outer end. The utility model has the advantages of reasonable design, need not to get into tempering furnace thermal treatment, through the cooperation of ceramic electric heating piece with fixed frock, can directly heat the tempering to lug and welding seam in lug position department, effective stress relief reduces the hardness in welding heat affected zone, changes its organizational performance, prevents lug brittle fracture.

Description

Local heat treatment device for flange lifting lug of large hydraulic cylinder

Technical Field

The utility model relates to a pneumatic cylinder manufacturing technical field especially relates to a local heat treatment device of large-scale pneumatic cylinder flange lug.

Background

The lifting lug plays an important role in the hoisting process of the hydraulic cylinder, so that the lifting lug can be used for tempering heat treatment of a welding seam after welding, and stress is eliminated; on the other hand, the hardness of a welding heat affected zone is reduced, the structure performance is changed, and the brittle fracture of the lifting lug is prevented. Because of the influence of the size of the tempering furnace, the welded lifting lugs of the large hydraulic cylinder cannot enter the tempering furnace for heat treatment, and therefore, a treatment device capable of performing heat treatment on the flange lifting lugs of the large hydraulic cylinder needs to be additionally designed aiming at the existing situation.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to overcome the not enough of prior art, the utility model provides a local heat treatment device of large-scale pneumatic cylinder flange lug to large-scale pneumatic cylinder design, can carry out heat treatment to lug and welding seam position department, and effective stress relief reduces the hardness in welding heat affected zone, prevents lug brittle fracture.

The utility model provides a technical scheme that its technical problem adopted is: a large-scale hydraulic cylinder flange lug local heat treatment device is used for heating lugs and welding seams between the lugs and a hydraulic cylinder, the lugs are welded and fixed at the front end of the hydraulic cylinder and comprise a fixing tool, a heating device and a heat preservation device, the heating device comprises an end surface heating sheet and a circumferential heating sheet, the end surface heating sheet covers the front end face of the hydraulic cylinder, a hollow hole for the lugs to extend out is formed in the end surface heating sheet, the circumferential heating sheet covers the outer circumferential face of the front end of the hydraulic cylinder in a surrounding manner, the heat preservation device comprises inner circumference heat preservation cotton, outer circumference heat preservation cotton, end surface heat preservation cotton and lug heat preservation cotton, the inner circumference heat preservation cotton is attached to the inner wall of the front end of the hydraulic cylinder, the outer circumference heat preservation cotton is correspondingly wrapped on the outer circumferential face of the circumferential heating sheet, the end surface heat preservation cotton is correspondingly arranged on the outer surface of the end surface heating sheet, the fixing tool is pressed outside the end surface heat preservation cotton, and the fixed tool and the end face heat insulation cotton are also hollowed to form an extending hole, the lifting lug extends out of the extending hole, and the lifting lug heat insulation cotton is wrapped on the outer surface of the lifting lug at the outer end of the fixed tool.

In the scheme, aiming at the large hydraulic cylinder which is inconvenient to enter the tempering furnace for heat treatment, the heating device which is installed at the position of the hydraulic cylinder installation lug is designed, the heat preservation device is designed outside the heating device, meanwhile, the heating device and the heat preservation device which are positioned at the front end of the hydraulic cylinder are in compression joint with the hydraulic cylinder through the fixed tool, heat treatment operation can be directly carried out on the lug and the welding seam, and the operation is convenient.

Furthermore, in order to facilitate assembly and installation, the end surface heating plate and the circumferential heating plate are formed by splicing a plurality of ceramic electric heating plates.

Further, along the pneumatic cylinder axial direction, the cotton length of periphery heat preservation is greater than the length of circumference heating plate, and the cotton front end of periphery heat preservation is good at the circumference heating plate tail end with circumference heating plate front end parallel and level, rear end.

Furthermore, the front end of the inner circumference heat insulation cotton extends forwards to be flush with the outer end face of the fixed tool.

The beneficial effects of the utility model are that, the utility model provides a local heat treatment device of large-scale pneumatic cylinder flange lug, structural design is reasonable, need not to get into tempering furnace heat treatment, through the cooperation of ceramic electric heating piece with fixed frock, can directly heat the tempering to lug and welding seam in lug position department, effective eliminating stress reduces the hardness in welding heat affected zone, changes its organizational performance, prevents lug brittle fracture.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the preferred embodiment of the present invention.

Figure 2 is a schematic view of a portion of an end face heater chip in a preferred embodiment of the invention.

Fig. 3 is a schematic structural diagram of a fixing tool in the preferred embodiment of the present invention.

FIG. 4 is a heat treatment process diagram of the preferred embodiment of the present invention.

In the figure, 1, inner circumference heat preservation cotton 2, a fixing tool 3, end face heat preservation cotton 4, lifting lug heat preservation cotton 5, lifting lugs 6, outer circumference heat preservation cotton 7, a circumferential heating sheet 8, a hydraulic cylinder 9, an end face heating sheet 10, a hollow hole 11 and an extension hole are arranged.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

Local heat treatment device of large-scale pneumatic cylinder flange lug as shown in fig. 1 to 3 is the utility model discloses the preferred embodiment for to the welding seam heating between lug 5 and pneumatic cylinder 8, lug 5 welded fastening is at the 8 front ends of pneumatic cylinder.

The local heat treatment device for the large-sized hydraulic cylinder flange lifting lug comprises a fixing tool 2, a heating device and a heat preservation device.

The heating device comprises an end face heating sheet 9 and a circumferential heating sheet 7, the end face heating sheet 9 covers the end face of the front end of the hydraulic cylinder 8, a hollow hole 10 for the lifting lug 5 to extend out is formed in the end face heating sheet 9, and the circumferential heating sheet 7 covers the outer peripheral face of the front end of the hydraulic cylinder 8 in a surrounding mode. The end surface heating plate 9 and the circumferential heating plate 7 are formed by splicing a plurality of ceramic electric heating plates. In actual design, ceramic electric heating pieces assembled by splicing form an end surface heating piece 9 and a circumferential heating piece 7, so that the ceramic electric heating piece is suitable for hydraulic cylinders 8 with different calibers, and is convenient for adaptive adjustment and assembly of the sizes of the types of the hydraulic cylinders 8.

The heat preservation device comprises inner circumference heat preservation cotton 1, outer circumference heat preservation cotton 6, end face heat preservation cotton 3 and lifting lug heat preservation cotton 4, wherein the inner circumference heat preservation cotton 1 is attached to the inner wall of the front end of the hydraulic cylinder 8, and the inner circumference heat preservation cotton 1 is used for heat preservation of the inner wall of the hydraulic cylinder 8. The periphery heat preservation cotton 6 is then corresponding the parcel at the 7 outer peripheral faces of circumference heating plate, and the cotton 6 heat preservation of periphery is used for the heat preservation of 8 outer walls of pneumatic cylinder. The end face heat preservation cotton 3 is correspondingly arranged on the outer surface of the end face heating sheet 9. The end face heat preservation cotton 3 is corresponding to the end face of the hydraulic cylinder 8 and heat preservation at the position of a welding line between the hydraulic cylinder 8 and the lifting lug 5. Fixed frock 2 then the crimping outside terminal surface heat preservation cotton 3, and fixed frock 2 and terminal surface heat preservation cotton 3 go up still the fretwork have and stretch out hole 11, lug 4 stretch out from stretching out hole 11, lug heat preservation cotton 4 outsourcing on 5 surfaces of lug in fixed frock 2 outer ends.

Simultaneously, in order to improve the heat preservation effect, along 8 axial directions of pneumatic cylinder, the cotton 6 length of periphery heat preservation is greater than the length of circumference heating plate 7, and the cotton 6 front end of periphery heat preservation is good at circumference heating plate 7 tail end with 7 front end parallel and level, rear end of circumference heating plate, the cotton 1 front end of interior periphery heat preservation extend forward to with the outer terminal surface parallel and level of fixed frock 2. Periphery heat preservation cotton 6 continues the backward extension at the rear end for circumference heating plate 7 promptly, can effectively wrap up circumference heating plate 7, and periphery heat preservation cotton 6 has then covered one section inner wall of fixed frock 2, terminal surface heat preservation cotton 3, terminal surface heating plate 9 and 8 front ends of pneumatic cylinder, has effectively covered the position that needs heat treatment, can further improve the heat preservation effect.

When the tool is used, the fixing tool 2, the heating device and the heat preservation device are installed and fixed according to the size and the position of the hydraulic cylinder 8 and the lifting lug 5, then the heat treatment process shown in figure 4 can be carried out, and the heating tempering operation is carried out on the lifting lug 5, the front end of the hydraulic cylinder 8 and the position of a welding seam.

The local heat treatment device of large-scale pneumatic cylinder flange lug of so design, structural design is reasonable, to inconvenient large-scale pneumatic cylinder 8 that gets into the tempering furnace and carry out heat treatment, designs the heating device who carries out the installation in the position department of pneumatic cylinder 8 installation lug 5 to the heating device peripheral hardware is counted heat preservation device. After 5 welding lugs, to lug 5 and welding seam position, need not to get into tempering furnace thermal treatment, through the cooperation of ceramic electric heating piece and fixed frock 2, can directly heat the tempering to lug 5 and welding seam in 5 position departments of lug, thermal treatment process simple operation, effective eliminating stress reduces the hardness in welding heat affected zone, changes its organizational performance, prevents 5 brittle fracture of lug.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a local heat treatment device of large-scale pneumatic cylinder flange lug for to lug (5) and joule and the welding seam heating between pneumatic cylinder (8), lug (5) welded fastening is at pneumatic cylinder (8) front end, its characterized in that: comprises a fixed tool (2), a heating device and a heat preservation device, wherein the heating device comprises an end face heating sheet (9) and a circumferential heating sheet (7), the end face heating sheet (9) covers the front end face of a hydraulic cylinder (8) and the end face heating sheet (9) is provided with a hollow hole (10) for a lifting lug (5) to extend out, the circumferential heating sheet (7) surrounds and covers the outer circumferential face of the front end of the hydraulic cylinder (8), the heat preservation device comprises inner circumference heat preservation cotton (1), outer circumference heat preservation cotton (6), end face heat preservation cotton (3) and lifting lug heat preservation cotton (4), the inner circumference heat preservation cotton (1) is attached to the inner wall of the front end of the hydraulic cylinder (8), the outer circumference heat preservation cotton (6) is correspondingly wrapped on the outer circumferential face of the circumferential heating sheet (7), the end face heat preservation cotton (3) is correspondingly arranged on the outer surface of the end face heating sheet (9), the fixed tool (2) is pressed outside the end face heat preservation cotton (3), and fixed frock (2) and terminal surface heat preservation cotton (3) go up still the fretwork have and stretch out hole (11), lug (5) stretch out from stretching out the hole, lug heat preservation cotton (4) outsourcing on lug (5) surface of fixed frock (2) outer end.

2. The local heat treatment device for the flange lifting lug of the large hydraulic cylinder as claimed in claim 1, wherein: the end surface heating sheets (9) and the circumferential heating sheets (7) are formed by splicing a plurality of ceramic electric heating sheets.

3. The local heat treatment device for the flange lifting lug of the large hydraulic cylinder as claimed in claim 1, wherein: along pneumatic cylinder (8) axial direction, the length of periphery heat preservation cotton (6) is greater than the length of circumference heating plate (7), and circumference heat preservation cotton (6) front end is good at circumference heating plate (7) front end parallel and level, rear end than circumference heating plate (7) tail end.

4. The local heat treatment device for the flange lifting lug of the large hydraulic cylinder as claimed in claim 1, wherein: the front end of the inner periphery heat insulation cotton (1) extends forwards to be flush with the outer end face of the fixed tool (2).