阅读说明：本技术 一种用于精确切割保温管道密封板的定位切割装置 (Positioning cutting device for accurately cutting sealing plate of heat-insulating pipeline ) 是由 胡锦标 熊海燕 陈镇超 华全胜 吴庆权 于 2021-06-25 设计创作，主要内容包括：本发明公开一种用于精确切割保温管道密封板的定位切割装置,包括第一割枪、第二割枪、用于引导第一割枪在工作管上朝着圆周方向运动且对第一割枪进行安装定位的第一定位导向机构、用于引导第二割枪在工作管上朝着圆周方向运动且对第二割枪进行安装定位的第二定位导向机构以及用于驱动第一定位导向机构与第二定位导向机构相互夹紧在工作管上的夹紧驱动机构；其中,所述第一割枪所切割的密封板的半径位置与所述第二割枪所切割密封板的半径位置不同。该装置在切割密封板的过程中,能够对割枪进行准确定位,从而保证工作管结构不被破坏,提高工作管的使用寿命,切割精度高,同时还能方便人工操作,提高了切割密封板的工作效率。(The invention discloses a positioning and cutting device for accurately cutting a sealing plate of a heat-insulating pipeline, which comprises a first cutting gun, a second cutting gun, a first positioning guide mechanism, a second positioning guide mechanism and a clamping driving mechanism, wherein the first positioning guide mechanism is used for guiding the first cutting gun to move towards the circumferential direction on a working pipe and installing and positioning the first cutting gun; wherein the radial position of the sealing plate cut by the first cutting gun is different from the radial position of the sealing plate cut by the second cutting gun. The device can pinpoint the burning torch at the in-process of cutting the closing plate to guarantee that work tube structure is not destroyed, improve the life of work tube, cutting accuracy is high, can also make things convenient for manual operation simultaneously, has improved the work efficiency of cutting the closing plate.)

1. A positioning and cutting device for accurately cutting a sealing plate of a heat-insulating pipeline is characterized by comprising a first cutting gun, a second cutting gun, a first positioning guide mechanism, a second positioning guide mechanism and a clamping driving mechanism, wherein the first positioning guide mechanism is used for guiding the first cutting gun to move towards the circumferential direction on a working pipe and installing and positioning the first cutting gun; wherein the radial position of the sealing plate cut by the first cutting gun is different from the radial position of the sealing plate cut by the second cutting gun.

2. The apparatus of claim 1, wherein the first cutting torch cuts the sealing plate at a radius greater than the sealing plate cut by the second cutting torch.

3. The positioning and cutting device for precisely cutting the sealing plate of the thermal insulation pipeline according to claim 1 or 2, wherein the first positioning and guiding mechanism comprises a first mounting frame and two first roller assemblies arranged on the first mounting frame and used for guiding the first mounting frame to slide on the working pipe, the first cutting torch is arranged on the first mounting frame, the two first roller assemblies are respectively arranged at two ends of the first mounting frame, and the arrangement direction of the two first roller assemblies is perpendicular to the axial direction of the working pipe.

4. The positioning and cutting device for accurately cutting the sealing plate of the thermal insulation pipeline according to claim 3, wherein the second positioning and guiding mechanism comprises a second mounting frame and two second roller assemblies arranged on the second mounting frame and used for guiding the second mounting frame to slide on the working pipe, wherein the second cutting torch is arranged on the second mounting frame, the two second roller assemblies are two groups, the two second roller assemblies are respectively arranged at two ends of the second mounting frame, and the arrangement direction of the two second roller assemblies is perpendicular to the axial direction of the working pipe.

5. The device of claim 4, wherein the clamping driving mechanism comprises a connecting member disposed between the first and second mounting frames and a compression spring disposed between the first mounting frame and the connecting member, wherein one end of the connecting member is hinged to the second mounting frame, and the middle of the connecting member is hinged to the first mounting frame; one end of the compression spring acts on the other end of the connecting piece, the other end of the compression spring acts on the first mounting frame, and the elastic force of the compression spring enables the first mounting frame and the second mounting frame to abut against the working pipe.

6. The positioning and cutting device for precisely cutting the sealing plate of the thermal insulation pipeline as claimed in claim 3, wherein a sliding member is arranged between the first mounting frame and the first cutting torch, wherein the sliding member is slidably arranged on the first mounting frame, and the sliding member slides along the tangential direction of the working pipe; the first cutting torch is mounted on the slide.

7. The device as claimed in claim 4, wherein the first and second mounting frames are provided with positioning rollers on a side close to the sealing plate, and the positioning rollers are connected to the sealing plate in a rolling manner when the sealing plate is cut.

8. The device of claim 3, wherein the first mounting bracket is provided with a handle extending in a circumferential direction.

9. A positioning and cutting device for precision cutting of insulating duct sealing sheets as claimed in claim 5, wherein said connecting member comprises a linear portion and an arcuate portion projecting outwardly away from the service pipe, said first mounting bracket being hinged at a point where said arcuate portion and said linear portion meet, said compression spring acting on the distal end of said linear portion, said distal end of said arcuate portion being hinged at a mid-portion of said second mounting bracket.

10. The positioning and cutting device for precisely cutting the sealing plate of the thermal insulation pipeline according to claim 5 or 9, wherein the first mounting frame comprises an "n" -shaped frame, a first outer edge frame and a second outer edge frame, the first outer edge frame is arranged at the end of the "n" -shaped frame far away from the working pipe, the second outer edge frame is arranged at the end of the "n" -shaped frame close to the working pipe, the first roller assembly and the sliding member are both arranged on the "n" -shaped frame, the compression spring acts on the first outer edge frame, and the connecting member is hinged on the second outer edge frame.

Technical Field

The invention relates to the technical field of heat-insulating pipeline equipment, in particular to a positioning and cutting device for accurately cutting a sealing plate of a heat-insulating pipeline.

Background

In thermal power plants and industrial and mining enterprises, it is generally necessary to transport steam through insulated pipes. The existing heat preservation pipe is generally composed of a working pipe, an outer sleeve sleeved on the working pipe and a heat preservation layer arranged between the working pipe and the outer sleeve, and heat preservation materials in the heat preservation layer can not contact water, so that the heat preservation pipe needs to be waterproof in the manufacturing process.

In the process of laying the heat preservation pipeline, a plurality of heat preservation pipes are generally required to be mutually butted, during butt joint, the working pipes are required to be welded, then sealing plates at the ends of the heat preservation pipes are cut off by cutting guns, then heat preservation materials are wrapped at the butt joint positions, finally, the outer sleeve is welded, the added heat preservation materials are wrapped, and finally, the butt joint of the heat preservation pipeline is completed. However, the above docking process has the following disadvantages:

in the sealed tube cutting off in-process, what adopt is manual operation, manual operation burning torch, the inner and the outer end of closing plate carry out annular cutting respectively, make closing plate and working tube, the outer tube separates, among the manual cutting process, cutting error is big, cutting accuracy is not high, the mistake phenomenon of cutting appears easily, lead to the working tube part to be amputated, cutting accuracy can not be guaranteed, the original structure of working tube has been destroyed, lead to the insulating tube at the steam delivery in-process, steam leakage takes place easily, thereby destroy the insulating layer material, cause economic loss, in addition, working tube leakage is at the later stage investigation very difficult, it is huge to consume the manpower fund, manual operation very difficult, and cutting quality can not be guaranteed.

Disclosure of Invention

The invention aims to overcome the existing problems and provides a positioning and cutting device for accurately cutting a sealing plate of a heat-insulating pipeline.

The purpose of the invention is realized by the following technical scheme:

a positioning and cutting device for accurately cutting a sealing plate of a heat-insulating pipeline comprises a first cutting gun, a second cutting gun, a first positioning guide mechanism, a second positioning guide mechanism and a clamping driving mechanism, wherein the first positioning guide mechanism is used for guiding the first cutting gun to move towards the circumferential direction on a working pipe and installing and positioning the first cutting gun, the second positioning guide mechanism is used for guiding the second cutting gun to move towards the circumferential direction on the working pipe and installing and positioning the second cutting gun, and the clamping driving mechanism is used for driving the first positioning guide mechanism and the second positioning guide mechanism to be clamped on the working pipe; wherein the radial position of the sealing plate cut by the first cutting gun is different from the radial position of the sealing plate cut by the second cutting gun.

The working principle of the positioning cutting device for accurately cutting the sealing plate of the heat-insulating pipeline is as follows:

when a plurality of heat preservation pipes are butted, a sealing plate on each heat preservation pipe needs to be cut off, a positioning cutting device is installed on a working pipe, a first positioning guide mechanism and a second positioning guide mechanism are clamped on the working pipe under the action of a clamping driving mechanism, a first cutting gun and a second cutting gun face the direction of the sealing plate respectively, the radius of the sealing plate cut by the first cutting gun is larger than that of the sealing plate cut by the second cutting gun, namely the first cutting gun cuts the outer end of the sealing plate and the second cutting gun cuts the inner end of the sealing plate, then the cutting guns are started, the positioning cutting device is manually pushed to rotate around the working pipe, the first positioning guide mechanism drives the first cutting gun to perform circular motion, the second positioning guide mechanism drives the second cutting gun to perform circular motion, the sealing plate is synchronously cut, and after the positioning cutting device rotates for a circle, the sealing plate can be connected with the working pipe, And separating the outer sleeve to complete the cutting of the sealing plate.

In a preferred embodiment of the present invention, the radius of the sealing plate cut by the first cutting torch is greater than the radius of the sealing plate cut by the second cutting torch, so that the first cutting torch can cut the outer end of the sealing plate and the second cutting torch can cut the inner end of the sealing plate, thereby ensuring that the sealing plate can be smoothly separated from the working pipe and the outer sleeve.

Preferably, first positioning guide mechanism includes first mounting bracket and sets up be used for the guide on the first mounting bracket first roller assemblies of first mounting bracket gliding on the working tube, wherein, first burning torch sets up on the first mounting bracket, first roller assemblies are two sets of, and two sets of first roller assemblies set up respectively the both ends of first mounting bracket, and the axis direction mutually perpendicular of the direction of two sets of first roller assemblies range and working tube. Through setting up above-mentioned structure, on the one hand, two sets of first wheel components can be so that the better placing of first mounting bracket is on the working pipe, and on the other hand can realize that first mounting bracket rotates round the working pipe to drive first burning torch and carry out circular motion, cut the closing plate.

Preferably, the first roller assembly comprises two first rollers oppositely arranged on the first mounting frame. By adopting the structure, the first mounting frame can be better placed on the working pipe and can roll on the working pipe through the first rollers, so that the first mounting frame can move on the working pipe more stably.

Preferably, the second positioning guide mechanism comprises a second mounting frame and a second roller assembly arranged on the second mounting frame and used for guiding the second mounting frame to slide on the working pipe, wherein the second cutting gun is arranged on the second mounting frame, the second roller assemblies are arranged in two groups, the two groups of second roller assemblies are respectively arranged at two ends of the second mounting frame, and the arrangement directions of the two groups of second roller assemblies are perpendicular to the axis direction of the working pipe. Through setting up above-mentioned structure, on the one hand, two sets of second wheel components can be so that the better placing of second mounting bracket is on the working tube, and on the other hand can realize that the second mounting bracket rotates round the working tube to drive the second burning torch and carry out circular motion, cut the closing plate.

Preferably, the second roller assembly includes two second rollers oppositely disposed on the second mounting frame. By adopting the structure, the second mounting rack can be better placed on the working pipe and can roll on the working pipe through the plurality of second rollers, so that the second mounting rack can move on the working pipe more stably.

Preferably, the clamping driving mechanism comprises a connecting piece arranged between the first mounting frame and the second mounting frame and a compression spring arranged between the first mounting frame and the connecting piece, wherein one end of the connecting piece is hinged with the second mounting frame, and the middle part of the connecting piece is hinged with the first mounting frame; one end of the compression spring acts on the other end of the connecting piece, the other end of the compression spring acts on the first mounting frame, and the elastic force of the compression spring enables the first mounting frame and the second mounting frame to abut against the working pipe. In the structure, the elastic force of the compression spring drives the connecting piece to swing around the connecting piece and the joint of the first mounting frame, so that the second mounting frame is driven to abut against the working pipe, the first mounting frame and the second mounting frame are clamped on the working pipe mutually under the interaction of the compression spring, and the first cutting gun and the second cutting gun are accurately positioned.

Preferably, a sliding part is arranged between the first mounting frame and the first cutting gun, wherein the sliding part is arranged on the first mounting frame in a sliding manner, and slides along the tangential direction of the working pipe; the first cutting torch is mounted on the slide. Through setting up the slider, can adjust the position of slider on first mounting bracket to adjust the cutting position of first burning torch, finally realize the position of first burning torch cutting sealing plate different radiuses.

Preferably, the first mounting frame and the second mounting frame are provided with positioning rollers on one sides close to the sealing plate, and the positioning rollers are connected to the sealing plate in a rolling manner when the sealing plate is cut. Through setting up the location gyro wheel, when cutting the closing plate, the location gyro wheel can roll on the closing plate, can realize the location cutting device in the ascending location of working pipe axis direction for the relative distance of first burning torch and second burning torch cutting closing plate keeps unchangeable, improves the cutting quality of closing plate.

Preferably, a handle is arranged on the first mounting frame, and the handle extends along the circumferential direction. Through setting up the handle, be convenient for to the operation of location cutting device, when using location cutting device, through handheld handle, drive location cutting device is rotatory round the working tube, can realize the cutting to the closing plate.

Preferably, the connecting member includes a straight portion and an arc portion, the arc portion protrudes outward away from the working pipe, the first mounting bracket is hinged to a position where the arc portion and the straight portion meet each other, the compression spring acts on a distal end of the straight portion, and a distal end of the arc portion is hinged to a middle portion of the second mounting bracket. By adopting the structure, the structure of the connecting piece is more compact by arranging the linear part and the arc part, so that the operation of the positioning cutting device is convenient; in addition, the tail end of the arc-shaped part is hinged to the middle of the second mounting frame, so that the second mounting frame is favorably and better abutted against the working pipe, and the accurate positioning of the second cutting gun is ensured.

Preferably, the first mounting frame comprises an "n" -type frame, a first outer edge frame and a second outer edge frame, the first outer edge frame and the second outer edge frame are arranged at the end parts of the "n" -type frame, the first outer edge frame is arranged at one end, far away from the working pipe, of the "n" -type frame, the second outer edge frame is arranged at one end, close to the working pipe, of the "n" -type frame, the first roller assembly and the sliding piece are arranged on the "n" -type frame, the compression spring acts on the first outer edge frame, and the connecting piece is hinged to the second outer edge frame. Adopt above-mentioned structure to make the structure of first mounting bracket become compacter, very convenient operation to location cutting device, in addition, set up "n" type frame, can effectively prevent that "n" type frame from taking place to contact with the working tube at the in-process of motion.

Preferably, the second mounting bracket includes the mounting panel of two relative settings and the fixed dead lever of setting between two mounting panels, wherein, the mounting panel is the arc, and the middle part of this mounting panel sets up the bellying, the connecting rod with the bellying is articulated, second wheel components all sets up with the second burning torch on the mounting panel. In the structure, the arc-shaped mounting plate is arranged, so that the mounting plate can be effectively prevented from contacting the working pipe in the movement process; in addition, the arrangement of the protruding part can enable the second mounting frame to be more compact, and meanwhile, the operation of the positioning cutting device is very convenient.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the positioning cutting device, the clamping driving mechanism is arranged, so that the first positioning guide mechanism and the second positioning guide mechanism are mutually clamped on the working pipe, and when the first positioning guide mechanism and the second positioning guide mechanism are driven to slide on the working pipe along the circumferential direction, the first cutting gun and the second cutting gun are driven to slide along the circumferential direction, and a sealing plate is synchronously cut; in the cutting process, under clamping mechanism's effect for first positioning guide mechanism and second positioning guide mechanism can be stable slip on the working pipe, carry out accurate location to first burning torch and second burning torch, make first burning torch and second burning torch can not change at radial position when the cutting, thereby guarantee to carry out stable cutting to the closing plate, and then guarantee that the working pipe structure is not destroyed, and cutting accuracy is high, improves the life of working pipe.

2. According to the positioning cutting device, the first positioning guide mechanism is arranged to carry out mounting, positioning and cutting on the first cutting gun, and the second positioning guide mechanism is arranged to carry out mounting, positioning and cutting on the second cutting gun.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of a positioning and cutting device for precisely cutting a sealing plate of an insulated pipe according to the present invention during operation.

Fig. 2 is a left side view of fig. 1 with one of the insulating tubes omitted.

Fig. 3 is a schematic perspective view of a positioning and cutting device according to the present invention.

Fig. 4-5 are schematic structural views of the positioning and cutting device of the present invention without the tubular bodies of the first cutting torch and the second cutting torch, wherein fig. 4 is a perspective view, and fig. 5 is a perspective view of another visual direction.

Fig. 6 is a schematic perspective view of a first mounting bracket according to the present invention.

Fig. 7 is a perspective view of the connector of the present invention.

Fig. 8 is a schematic perspective view of a second positioning and guiding mechanism according to the present invention.

Detailed Description

In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Referring to fig. 1 to 3, the positioning and cutting device for accurately cutting a sealing plate of a thermal insulation pipeline in the embodiment includes a first cutting torch 1, a second cutting torch 2, a first positioning guide mechanism 3 for guiding the first cutting torch 1 to move in a circumferential direction on a working pipe 7 and installing and positioning the first cutting torch 1, a second positioning guide mechanism 4 for guiding the second cutting torch 2 to move in the circumferential direction on the working pipe 7 and installing and positioning the second cutting torch 2, and a clamping driving mechanism 5 for driving the first positioning guide mechanism 3 and the second positioning guide mechanism 4 to clamp on the working pipe 7; wherein, the radius position of the sealing plate 8 cut by the first cutting gun 1 is different from the radius position of the sealing plate 8 cut by the second cutting gun 2; the first cutting gun 1 and the second cutting gun both cut the sealing plate 8 by spraying high-temperature flame, so that the sealing plate 8 is separated from the heat-insulating pipeline.

Referring to fig. 1 to 3, in the positioning and cutting device in this embodiment, a clamping driving mechanism 5 is provided, so that a first positioning and guiding mechanism 3 and a second positioning and guiding mechanism 4 are clamped on a working pipe 7, and when the first positioning and guiding mechanism 3 and the second positioning and guiding mechanism 4 are driven to slide on the working pipe 7 along a circumferential direction, a first cutting torch 1 and a second cutting torch 2 are driven to slide along the circumferential direction, so as to synchronously cut a sealing plate 8; in the cutting process, under the action of the clamping mechanism, the first positioning guide mechanism 3 and the second positioning guide mechanism 4 can stably slide on the working pipe 7 to accurately position the first cutting gun 1 and the second cutting gun 2, so that the radial positions of the first cutting gun 1 and the second cutting gun 2 cannot be changed during cutting, the sealing plate 8 is stably cut, the structure of the working pipe 7 is guaranteed not to be damaged, the cutting precision is high, and the service life of the working pipe 7 is prolonged; in addition, install the location cutting through setting up first positioning guide mechanism 3 to first burning torch 1, set up second positioning guide mechanism 4 and install the location cutting to second burning torch 2, compare manual operation burning torch, the device makes things convenient for the manual work to operate more, and two burning torches simultaneous working greatly cut the efficiency of closing plate 8.

Referring to fig. 1 to 3, the radius of the sealing plate 8 cut by the first cutting torch 1 is greater than the radius of the sealing plate 8 cut by the second cutting torch 2, so that the first cutting torch 1 can cut the outer end of the sealing plate 8, and the second cutting torch 2 can cut the inner end of the sealing plate 8, thereby ensuring that the sealing plate 8 can be smoothly separated from the working pipe 7 and the outer sleeve.

Referring to fig. 4-5, the first positioning and guiding mechanism 3 includes a first mounting frame 3-1 and first roller assemblies disposed on the first mounting frame 3-1 for guiding the first mounting frame 3-1 to slide on the working pipe 7, wherein the first cutting torch 1 is disposed on the first mounting frame 3-1, the first roller assemblies are disposed in two groups, the two groups of first roller assemblies are disposed at two ends of the first mounting frame 3-1, respectively, and the two groups of first roller assemblies are arranged in a direction perpendicular to the axial direction of the working pipe 7; the center distance between the two groups of first roller components is smaller than the diameter of the working pipe 7. By the arrangement of the structure, on one hand, the first mounting frame 3-1 can be better placed on the working pipe 7 through the two groups of first roller assemblies, and on the other hand, the first mounting frame 3-1 can rotate around the working pipe 7, so that the first cutting gun 1 is driven to perform circular motion to cut the sealing plate 8; in addition, the center distance between the two groups of first roller assemblies is smaller than the diameter of the working pipe 7, so that the first mounting frame 3-1 is better slidably mounted on the working pipe 7, and the two groups of first roller assemblies can be guaranteed to slide on the working pipe 7.

Referring to fig. 4 to 5, the first roller assembly includes two first rollers 3-2 oppositely disposed on the first mounting frame 3-1. By adopting the structure, the first mounting frame 3-1 can be better placed on the working pipe 7, and the first mounting frame 3-1 can move on the working pipe 7 more stably by rolling on the working pipe 7 through the plurality of first rollers 3-2.

Referring to fig. 4-5, the second positioning and guiding mechanism 4 includes a second mounting frame 4-1 and second roller assemblies disposed on the second mounting frame 4-1 for guiding the second mounting frame 4-1 to slide on the working pipe 7, wherein the second cutting torch 2 is disposed on the second mounting frame 4-1, the second roller assemblies are two sets, the two sets of second roller assemblies are respectively disposed at two ends of the second mounting frame 4-1, the arrangement direction of the two sets of second roller assemblies is perpendicular to the axial direction of the working pipe 7, and the center distance between the two sets of second roller assemblies is smaller than the diameter of the working pipe 7. By the arrangement of the structure, on one hand, the second mounting rack 4-1 can be better placed on the working pipe 7 through the two groups of second roller assemblies, and on the other hand, the second mounting rack 4-1 can rotate around the working pipe 7, so that the second cutting gun 2 is driven to perform circular motion to cut the sealing plate 8; in addition, the center distance between the two groups of second roller assemblies is smaller than the diameter of the working pipe 7, so that the second mounting frame 4-1 is better slidably mounted on the working pipe 7, and the two groups of second roller assemblies can be guaranteed to slide on the working pipe 7.

Referring to fig. 4 and 5, the second roller assembly includes two second rollers 4-2 oppositely disposed on the second mounting frame 4-1. By adopting the structure, the second mounting rack 4-1 can be better placed on the working pipe 7, and the second mounting rack 4-1 can move on the working pipe 7 more stably by rolling on the working pipe 7 through the plurality of second rollers 4-2.

Referring to fig. 4 and 5, the clamping driving mechanism 5 comprises a connecting member 5-1 disposed between the first mounting frame 3-1 and the second mounting frame 4-1, and a compression spring 5-2 disposed between the first mounting frame 3-1 and the connecting member 5-1, wherein one end of the connecting member 5-1 is hinged to the second mounting frame 4-1, and the middle part of the connecting member 5-1 is hinged to the first mounting frame 3-1; one end of the compression spring 5-2 acts on the other end of the connecting piece 5-1, the other end of the compression spring 5-2 acts on the first mounting frame 3-1, and the elastic force of the compression spring 5-2 urges the first mounting frame 3-1 and the second mounting frame 4-1 against each other on the working pipe 7. In the structure, the elastic force of the compression spring 5-2 can drive the connecting piece 5-1 to swing around the joint of the connecting piece 5-1 and the first mounting frame 3-1, so that the second mounting frame 4-1 is driven to abut against the working pipe 7, and under the interaction of the compression spring 5-2, the first mounting frame 3-1 and the second mounting frame 4-1 are mutually clamped on the working pipe 7, so that the first cutting gun 1 and the second cutting gun 2 are accurately positioned.

Referring to fig. 4 and 5, a sliding part 6 is arranged between the first mounting frame 3-1 and the first cutting torch 1, wherein the sliding part 6 is slidably arranged on the first mounting frame 3-1, and the sliding part 6 slides along the tangential direction of the working pipe 7; the first cutting torch 1 is mounted on the slide 6. Through setting up slider 6, can adjust the position of slider 6 on first mounting bracket 3-1 to the cutting position of adjusting first burning torch 1 finally realizes the position of first burning torch 1 cutting different radiuses of closing plate 8.

Referring to fig. 5, the sliding member 6 is provided with a sliding adjustment groove 6-1, and the first mounting bracket 3-1 is provided with an adjustment bolt (not shown), which passes through the sliding adjustment groove 6-1. In the structure, the sliding part 6 is moved to adjust the relative position of the sliding adjusting groove 6-1 and the adjusting bolt, and then the sliding part 6 is fixed through the adjusting bolt, so that the position of the first cutting gun 1 is adjusted and fixed.

Referring to fig. 5, the first mounting frame 3-1 and the second mounting frame 4-1 are provided with positioning rollers 10 on one side close to the sealing plate 8, the positioning rollers 10 are mounted on the first mounting frame 3-1 and the second mounting frame 4-1 through mounting seats 11, and the positioning rollers 10 are connected to the sealing plate 8 in a rolling manner when the sealing plate 8 is cut. Through setting up positioning roller 10, when cutting closing plate 8, positioning roller 10 can roll on closing plate 8, can realize the location of location cutting device on 7 axis directions of working pipe for the relative distance that first burning torch 1 and second burning torch 2 cut closing plate 8 keeps unchangeable, improves closing plate 8's cutting quality.

Referring to fig. 4 to 5, the first mounting frame 3-1 is provided with a handle 12, and the handle 12 extends along a circumferential direction. Through setting up handle 12, be convenient for to the operation of location cutting device, when using location cutting device, through handheld handle 12, drive location cutting device is rotatory round working tube 7, can realize the cutting to closing plate 8, and handle 12 extends along the circumferencial direction for handle 12 is arc, and this arc is convex towards the direction protrusion of keeping away from working tube 7, can make the structure become compacter like this, convenient operation.

Referring to fig. 7, the connection member 5-1 includes a straight portion 5-11 and an arc portion 5-12, the arc portion 5-12 is protruded outwardly away from the service pipe 7, the first mounting bracket 3-1 is hinged at a position where the arc portion 5-12 and the straight portion 5-11 meet each other, the pressing spring 5-2 acts on a distal end of the straight portion 5-11, and a distal end of the arc portion 5-12 is hinged at a middle portion of the second mounting bracket 4-1. By adopting the structure, the structure of the connecting piece 5-1 is more compact by arranging the linear part 5-11 and the arc part 5-12, so that the operation of the positioning cutting device is convenient; in addition, the tail end of the arc-shaped part 5-12 is hinged to the middle of the second mounting frame 4-1, so that the second mounting frame 4-1 is favorably and better abutted against the working pipe 7, and the accurate positioning of the second cutting gun 2 is ensured.

Referring to fig. 6, the first mounting frame 3-1 includes an "n" -type frame 3-11, a first outer edge frame 3-12 and a second outer edge frame 3-13, wherein the first outer edge frame 3-12 is disposed at an end of the "n" -type frame 3-11 away from the working pipe 7, the second outer edge frame 3-13 is disposed at an end of the "n" -type frame 3-11 close to the working pipe 7, the first roller 3-2, the handle 12 and the slider 6 are disposed on the "n" -type frame 3-11, the compression spring 5-2 acts on the first outer edge frame 3-12, and the connecting member 5-1 is hinged to the second outer edge frame 3-13. By adopting the structure, the structure of the first mounting frame 3-1 becomes more compact, the operation of the positioning cutting device is very convenient, and in addition, the n-shaped frame 3-11 is arranged, so that the n-shaped frame 3-11 can be effectively prevented from contacting with the working pipe 7 in the moving process.

Referring to fig. 8, the second mounting bracket 4-1 includes two opposite mounting plates 4-11 and a fixing rod 4-2 fixedly disposed between the two mounting plates 4-11, wherein the mounting plates 4-11 are arc-shaped, a protruding portion 4-111 is disposed in the middle of the mounting plates 4-11, the connecting rod is hinged to the protruding portion 4-111, and the second roller 4-2 and the second cutting torch 2 are both disposed on the mounting plates 4-11. In the structure, the arc-shaped mounting plates 4-11 are arranged, so that the mounting plates 4-11 can be effectively prevented from contacting the working pipe 7 in the moving process; in addition, the provision of the raised portion 4-111 makes the second mounting frame 4-1 more compact and also facilitates the operation of positioning the cutting device.

Referring to fig. 1-3, the positioning and cutting device for precisely cutting the sealing plate of the thermal insulation pipeline works according to the following principle:

when a plurality of heat preservation pipes are butted, a sealing plate 8 on each heat preservation pipe needs to be cut off, a positioning cutting device is firstly installed on a working pipe 7, a first positioning guide mechanism 3 and a second positioning guide mechanism 4 are mutually clamped on the working pipe 7 under the action of a clamping driving mechanism 5, a first cutting gun 1 and a second cutting gun 2 respectively face the direction of the sealing plate 8, the radius of the sealing plate 8 cut by the first cutting gun 1 is larger than that of the sealing plate 8 cut by the second cutting gun 2, namely the first cutting gun 1 cuts the outer end of the sealing plate 8, the second cutting gun 2 cuts the inner end of the sealing plate 8, then the cutting guns are started, the positioning cutting device is manually pushed to rotate around the working pipe 7, the first positioning guide mechanism 3 drives the first cutting gun 1 to perform circular motion, the second positioning guide mechanism 4 drives the second cutting gun 2 to perform circular motion, and the sealing plate 8 is synchronously cut, after the positioning cutting device rotates for a circle, the sealing plate 8 can be separated from the working tube 7 and the outer sleeve, and the sealing plate 8 is cut.

The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.