阅读说明：本技术 低温绝热气瓶凹坑复原方法 (Pit recovery method for low-temperature heat-insulation gas cylinder ) 是由 孙兰萍 王超 徐小婷 王魁 赵耀明 于 2019-10-24 设计创作，主要内容包括：一种低温绝热气瓶凹坑复原方法,涉及低温绝热气瓶凹坑复原技术领域,包括焊点调节机构,设置四个提拉柱和导杆,提拉柱的上端与滑块固定相接,滑块套装在导杆上,导杆与提拉机构铰接,使得提拉柱可以左右移动,水平摆动；通过在提拉柱和滑块之间设置高低位调节机构,使得提拉柱在竖向的高度可调,满足不同形状,不同深浅凹坑的焊点需求；通过固定支架将低温绝热气瓶固定住,采用提拉柱与凹坑表面焊接,先对凹坑施加预拉力,再对凹坑边缘进行均匀加热,缓慢增大拉力,直至凹坑上表面向上凸起并恢复至原来的位置状态,复原后将提拉柱与凹坑上表面分离,并对凹坑上表面打磨至光滑；本发明采用四点焊接,焊接点多,受力均匀,恢复效果更好。(A pit recovery method for a low-temperature heat-insulation gas cylinder relates to the technical field of pit recovery of the low-temperature heat-insulation gas cylinder and comprises a welding spot adjusting mechanism, a lifting column and a guide rod, wherein the four lifting columns and the guide rod are arranged, the upper ends of the lifting columns are fixedly connected with a sliding block, the sliding block is sleeved on the guide rod, and the guide rod is hinged with the lifting mechanism, so that the lifting columns can move left and right and horizontally swing; the height adjusting mechanism is arranged between the lifting column and the sliding block, so that the lifting column can be adjusted in vertical height, and the requirements of welding spots of pits with different shapes and different depths are met; fixing the low-temperature heat-insulation gas cylinder by a fixing support, welding a lifting column with the surface of a pit, firstly applying pretension to the pit, uniformly heating the edge of the pit, slowly increasing tension until the upper surface of the pit protrudes upwards and returns to the original position state, separating the lifting column from the upper surface of the pit after restoration, and polishing the upper surface of the pit to be smooth; the invention adopts four-point welding, has more welding points, uniform stress and better recovery effect.)

1. A pit recovery method for a low-temperature heat-insulation gas cylinder is characterized by comprising the following steps: the device comprises a fixed support for fixing the low-temperature heat-insulation gas cylinder, wherein a lifting mechanism for restoring a pit of the low-temperature heat-insulation gas cylinder is arranged on the fixed support, and a welding spot adjusting mechanism is arranged at the bottom end of the lifting mechanism;

the welding spot adjusting mechanism comprises four lifting columns which are used for being welded and fixed with the pit part of the low-temperature heat-insulation gas cylinder, two horizontal guide rods are arranged at the bottom end of the lifting mechanism, the middle parts of the two guide rods are respectively hinged with the bottom end of the lifting mechanism, the two guide rods are divided into four sections by hinge joints, four sliding blocks which are arranged corresponding to the four lifting columns are sleeved on each section of guide rod in a sliding mode, a high-low position adjusting mechanism with a locking device is arranged between the lower end of each sliding block and the lifting column, and a heating mechanism which is used for heating the edge of the pit to facilitate lifting is arranged on the fixed support;

the specific method comprises the following steps:

(1) rotating the low-temperature heat-insulating gas cylinder to enable the pit to face upwards, and fixing the low-temperature heat-insulating gas cylinder by using a fixing support to prevent the low-temperature heat-insulating gas cylinder from rotating;

(2) according to the depth and the shape of the pit, four lifting columns are dispersedly welded on the upper surface of the pit, and the lower end parts of the lifting columns are tightly attached to the upper surface of the pit through intermittent welding;

(3) the position of the high-low adjusting mechanism is adjusted by sliding the sliding block on the guide rod, so that the high-low adjusting mechanism is aligned with the four lifting columns, and the upper ends of the lifting columns are butted with the high-low adjusting mechanism;

(4) lifting upwards through the lifting mechanism, pulling the lifting column, and applying and maintaining an upward pretension force to the pit;

(5) uniformly heating the edge of the pit by a heating mechanism, and slowly increasing the lifting force until the upper surface of the pit protrudes upwards and returns to the original position state;

(6) and after the pits are restored, the lifting columns are separated from the pits by cutting the welding points, and the welding points are polished to be smooth by using a grinding wheel.

2. The cryogenically insulated gas cylinder pit recovery apparatus of claim 1, wherein: the lifting mechanism comprises vertical compression plates symmetrically arranged on two sides of a fixed support, the upper ends of the compression plates are fixedly connected with the fixed support, arc-shaped compression grooves matched with the radian of the outer circumferential surface of the low-temperature insulating gas cylinder are formed in the lower portion of the compression plates, a threaded pull rod is arranged on the fixed support between the compression plates on the two sides, the middle of a guide rod is hinged to the lower end of the threaded pull rod, the upper end of the threaded pull rod penetrates through the fixed support and extends to the upper portion of the fixed support, and a threaded sleeve matched with the fixed support to lift the threaded pull rod upwards is sleeved on the threaded pull rod above the fixed support in a threaded manner.

3. The cryogenically insulated gas cylinder pit recovery apparatus of claim 2, wherein: the outer wall of the screw sleeve is welded with a rotary wrench.

4. The cryogenically insulated gas cylinder pit recovery apparatus of claim 2, wherein: the lower part of the pressure strip is provided with a bearing bracket, the bearing bracket is provided with a bearing plate butted with the pressure strip, the bearing plate is provided with an arc bearing groove matched with the arc pressing groove, and the arc pressing groove and the arc bearing groove are matched to form a placing cavity for placing the low-temperature heat insulation gas cylinder.

5. The cryogenically insulated gas cylinder pit recovery apparatus of claim 1, wherein: the high-low position adjusting mechanism comprises a vertical adjusting pipe, the pipe opening of the adjusting pipe is arranged downwards, the upper end of the adjusting pipe is fixedly connected with a sliding block, and the lower end of the adjusting pipe is sleeved on the lifting column in a sliding mode.

6. The cryogenically insulated gas cylinder pit recovery apparatus of claim 5, wherein: the locking device comprises a locking screw hole formed in the wall of the adjusting pipe and a locking screw used for locking the lifting column through the locking screw hole.

7. The cryogenically insulated gas cylinder pit recovery apparatus of claim 1, wherein: the heating mechanism comprises a plurality of flame nozzles for heating a circle of the edge of the pit, the flame nozzles are connected to the mixed gas supply pipe, a clamping device for clamping the mixed gas supply pipe is arranged on the fixed support, and the clamping device is connected with the fixed support through a locking screw.

8. The cryogenically insulated gas cylinder pit recovery apparatus of claim 2, wherein: the pressing plate above the arc pressing groove is provided with an arc groove for accommodating the welding spot adjusting mechanism, and two ends of the arc groove are connected with the arc pressing groove.

Technical Field

The invention relates to the technical field of pit recovery of a low-temperature heat-insulation gas cylinder, in particular to a pit recovery method of a low-temperature heat-insulation gas cylinder.

Background

The cryogenic gas cylinder has been used in developed countries such as the United states for more than thirty years, the safety and reliability of the cryogenic gas cylinder are improved by 200 percent compared with the safety and reliability of a common permanent gas cylinder, the energy conservation is improved by 600 percent, the material saving is improved by 800 percent, and the emission reduction effect is improved by 400 percent. In order to ensure safe and reliable use of low-temperature gas cylinders, the state promulgated the "gas cylinder safety supervision rules" in 2000, wherein it is stipulated that low-temperature gas cylinders must be checked regularly every three years. Inadvertent collision often occurs in the use process of the low-temperature gas cylinder, which causes the generation of pits outside the low-temperature gas cylinder, the pits press the inner evaporator pipe and compress the multilayer heat-insulating materials until the pits touch the inner container, so that the low-temperature liquid in the low-temperature gas cylinder is subjected to heat conduction, the cold running, the icing and the frosting outside the low-temperature gas cylinder occur, and extremely serious potential safety hazards are brought, and the national standard GB/T34347-2017 periodic inspection and evaluation of low-temperature heat-insulating gas cylinders stipulates that when the depression depth of the shell of the low-temperature gas cylinder is greater than or equal to 12mm, and when the length of the depression is more than or equal to 13 percent of the perimeter of the shell, the low-temperature gas cylinder is unqualified and can only be scrapped, thus causing the waste of a large amount of resources, therefore, it is necessary to provide a device capable of restoring the pit of the cryogenic insulation gas cylinder, and the technical scheme of the cryogenic insulation gas cylinder pit repairing device in the prior art has the following defects: the steel plate is welded in the pit, and the repair is hard for single-point contact usually, and the single-point is drawn and is drawn, causes the local of welding point to recover easily, and the surface unevenness after drawing is unsmooth, can not the reconversion.

Disclosure of Invention

The invention aims to solve the technical problem of providing a pit recovery method of a low-temperature heat-insulation gas cylinder, which is capable of being lifted at multiple points, saves labor for recovery and can be well recovered.

The technical problem to be solved by the invention is realized by the following technical scheme, and the pit recovery method of the low-temperature heat-insulation gas cylinder is characterized by comprising a fixing support for fixing the low-temperature heat-insulation gas cylinder, wherein a lifting mechanism for recovering the pit of the low-temperature heat-insulation gas cylinder is arranged on the fixing support, and a welding spot adjusting mechanism is arranged at the bottom end of the lifting mechanism;

the welding spot adjusting mechanism comprises four lifting columns which are used for being welded and fixed with the pit part of the low-temperature heat-insulation gas cylinder, two horizontal guide rods are arranged at the bottom end of the lifting mechanism, the middle parts of the two guide rods are respectively hinged with the bottom end of the lifting mechanism, the two guide rods are divided into four sections by hinge joints, four sliding blocks which are arranged corresponding to the four lifting columns are sleeved on each section of guide rod in a sliding mode, a high-low position adjusting mechanism with a locking device is arranged between the lower end of each sliding block and the lifting column, and a heating mechanism which is used for heating the edge of the pit to facilitate lifting is arranged on the fixed support;

the specific method comprises the following steps:

(1) rotating the low-temperature heat-insulating gas cylinder to enable the pit to face upwards, and fixing the low-temperature heat-insulating gas cylinder by using a fixing support to prevent the low-temperature heat-insulating gas cylinder from rotating;

(2) according to the depth and the shape of the pit, four lifting columns are dispersedly welded on the upper surface of the pit, and the lower end parts of the lifting columns are tightly attached to the upper surface of the pit through intermittent welding;

(3) the position of the high-low adjusting mechanism is adjusted by sliding the sliding block on the guide rod, so that the high-low adjusting mechanism is aligned with the four lifting columns, and the upper ends of the lifting columns are butted with the high-low adjusting mechanism;

(4) lifting upwards through the lifting mechanism, pulling the lifting column, and applying and maintaining an upward pretension force to the pit;

(5) uniformly heating the edge of the pit by a heating mechanism, and slowly increasing the lifting force until the upper surface of the pit protrudes upwards and returns to the original position state;

(6) and after the pits are restored, the lifting columns are separated from the pits by cutting the welding points, and the welding points are polished to be smooth by using a grinding wheel.

The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein in the pit recovery method of the low-temperature heat-insulation gas cylinder, the pit recovery method comprises the following steps: the lifting mechanism comprises vertical compression plates symmetrically arranged on two sides of a fixed support, the upper ends of the compression plates are fixedly connected with the fixed support, arc-shaped compression grooves matched with the radian of the outer circumferential surface of the low-temperature insulating gas cylinder are formed in the lower portion of the compression plates, a threaded pull rod is arranged on the fixed support between the compression plates on the two sides, the middle of a guide rod is hinged to the lower end of the threaded pull rod, the upper end of the threaded pull rod penetrates through the fixed support and extends to the upper portion of the fixed support, and a threaded sleeve matched with the fixed support to lift the threaded pull rod upwards is sleeved on the threaded pull rod above the fixed support in a threaded manner.

The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein in the pit recovery method of the low-temperature heat-insulation gas cylinder, the pit recovery method comprises the following steps: the outer wall of the screw sleeve is welded with a rotary wrench.

The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein in the pit recovery method of the low-temperature heat-insulation gas cylinder, the pit recovery method comprises the following steps: the lower part of the pressure strip is provided with a bearing bracket, the bearing bracket is provided with a bearing plate butted with the pressure strip, the bearing plate is provided with an arc bearing groove matched with the arc pressing groove, and the arc pressing groove and the arc bearing groove are matched to form a placing cavity for placing the low-temperature heat insulation gas cylinder.

The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein in the pit recovery method of the low-temperature heat-insulation gas cylinder, the pit recovery method comprises the following steps: the high-low position adjusting mechanism comprises a vertical adjusting pipe, the pipe opening of the adjusting pipe is arranged downwards, the upper end of the adjusting pipe is fixedly connected with a sliding block, and the lower end of the adjusting pipe is sleeved on the lifting column in a sliding mode.

The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein in the pit recovery method of the low-temperature heat-insulation gas cylinder, the pit recovery method comprises the following steps: the locking device comprises a locking screw hole formed in the wall of the adjusting pipe and a locking screw used for locking the lifting column through the locking screw hole.

The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein in the pit recovery method of the low-temperature heat-insulation gas cylinder, the pit recovery method comprises the following steps: the heating mechanism comprises a plurality of flame nozzles for heating a circle of the edge of the pit, the flame nozzles are connected to the mixed gas supply pipe, a clamping device for clamping the mixed gas supply pipe is arranged on the fixed support, and the clamping device is connected with the fixed support through a locking screw.

The technical problem to be solved by the invention can be further realized by the following technical scheme, wherein in the pit recovery method of the low-temperature heat-insulation gas cylinder, the pit recovery method comprises the following steps: the pressing plate above the arc pressing groove is provided with an arc groove for accommodating the welding spot adjusting mechanism, and two ends of the arc groove are connected with the arc pressing groove.

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

the welding spot adjusting mechanism is provided with four lifting columns and horizontal guide rods, the upper ends of the lifting columns are fixedly connected with a sliding block, the sliding block is sleeved on the guide rods, the guide rods are hinged with the lifting mechanism, so that the lifting columns can move left and right relative to the guide rods, the space between the lifting columns is adjusted, and the guide rods can be rotated to change the relative positions between the lifting columns; the height adjusting mechanism is arranged between the lifting column and the sliding block, so that the lifting column can be adjusted in vertical height, and the requirements of welding spots of pits with different shapes and different depths are met;

the low-temperature heat-insulation gas cylinder is fixed, so that the lifting recovery operation can be more stable, and the recovery effect can be ensured; adopt to carry and draw post and pit surface welding, firm in connection guarantees to carry to carrying of pit and draws the stable going on of operation, exerts the pretension to the pit earlier, carries out the even heating to the pit edge again, and the pit is heated and is out of shape, when saving tensile, more is favorable to restoring of pit, and adopts four spot welding, and the welding point is many, and the atress is even, and recovery effect is better.

Drawings

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a side view of the present invention;

FIG. 3 is an enlarged view of the structure at B in FIG. 1;

FIG. 4 is a schematic structural view of a heating mechanism;

fig. 5 is a schematic view of the matching structure of the lifting column and the concave pit in the recovery working state.

In the figure: 1. the device comprises a fixed support, 101, a compression plate, 102, an arc compression groove, 103, an arc groove, 104, a support bracket, 105, an arc support groove, 2, a lifting mechanism, 201, a threaded pull rod, 202, a threaded sleeve, 203, a rotary wrench, 3, a welding point adjusting mechanism, 301, a lifting column, 302, a guide rod, 303, a sliding block, 304, an adjusting pipe, 305, a locking screw, 4, a heating mechanism, 401, a flame spray head, 402, a mixed gas supply pipe, 403, a clamping device, 5, a low-temperature heat-insulation gas bottle and 6, a pit.

Detailed Description

The following further describes particular embodiments of the present invention to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.

[ example 1 ]

Referring to fig. 1 and fig. 2, a method for restoring a pit of a cryogenic insulation gas cylinder includes a fixing support 1 for fixing a cryogenic insulation gas cylinder 5, a lifting mechanism 2 for restoring the pit of the cryogenic insulation gas cylinder is provided on the fixing support 1, and a welding spot adjusting mechanism 3 is provided at the bottom end of the lifting mechanism 2;

referring to fig. 3, the welding spot adjusting mechanism 3 includes four lifting columns 301 for welding and fixing with the pit portion of the cryogenic insulation gas cylinder, two horizontal guide rods 302 are arranged at the bottom end of the lifting mechanism 2, the middle portions of the two guide rods 302 are respectively hinged with the bottom end of the lifting mechanism 2, the two guide rods 302 are divided into four sections by a hinge joint, four sliders 303 corresponding to the four lifting columns 301 are slidably sleeved on each section of guide rod 302, a high-low position adjusting mechanism with a locking device is arranged between the lower ends of the sliders 303 and the lifting columns 301, and a heating mechanism 4 for heating the edge of the pit 6 to facilitate lifting is arranged on the fixing support 1;

referring to fig. 5, the specific method is:

(1) rotating the low-temperature heat-insulating gas cylinder 5 to enable the pit 6 to be upward, and fixing the low-temperature heat-insulating gas cylinder 5 by using the fixing support 1 to prevent the low-temperature heat-insulating gas cylinder from rotating;

(2) according to the depth and the shape of the pit 6, four lifting columns 301 are dispersedly welded on the upper surface of the pit 6, and the lower end parts of the lifting columns 301 are tightly attached to the upper surface of the pit 6 through intermittent welding;

(3) the position of the high-low adjusting mechanism is adjusted through sliding the sliding block 303 on the guide rod 302, so that the high-low adjusting mechanism is aligned with the four lifting columns 301, and the upper ends of the lifting columns 301 are butted with the high-low adjusting mechanism;

(4) the lifting mechanism 2 is lifted upwards, the lifting column 301 is pulled, and an upward pretension force is applied to the pit 6 and is kept;

(5) uniformly heating the edges of the pits 6 by the heating mechanism 4, and slowly increasing the lifting force until the upper surfaces of the pits 6 protrude upwards and return to the original position state; wherein, the welding column firstly pulled to the horizontal restoration surface is unlocked by unscrewing the locking screw 305, so that the welding point can not be pulled along with the pulling in the subsequent pulling process and always keeps the horizontal position;

(6) after the pits 6 are restored, the lifting columns 301 are separated from the pits 6 by cutting the welding points, and the welding points are polished to be smooth by using a grinding wheel.

The lifting mechanism 2 comprises vertical pressing plates 101 symmetrically arranged on two sides of a fixed support 1, the upper ends of the pressing plates 101 are fixedly connected with the fixed support 1, arc-shaped pressing grooves 102 which are matched with the radian of the outer circumferential surface of the low-temperature insulating gas cylinder are formed in the lower portion of the pressing plates 101, a threaded pull rod 201 is arranged on the fixed support 1 between the pressing plates 101 on two sides, the middle portion of a guide rod 302 is hinged to the lower end of the threaded pull rod 201, the upper end of the threaded pull rod 201 penetrates through the fixed support 1 and extends to the upper portion of the fixed support 1, and a threaded sleeve 202 which is matched with the fixed support 1 to lift the threaded pull rod 201 upwards is sleeved on the threaded pull rod 201 above the fixed support 1 in a threaded.

A rotary wrench 203 is welded to the outer wall of the screw sleeve 202. When the lifting column 301 at the lower end of the threaded pull rod 201 is welded with the pit 6, the rotating wrench 203 is rotated to drive the threaded sleeve 202 to move downwards, but the threaded sleeve 202 cannot rotate downwards due to the limitation of the fixed bracket 1, an upward reaction force is applied to the threaded pull rod 201, and the threaded pull rod 201 is lifted upwards.

A bearing bracket 104 is arranged below the pressure strip 101, a bearing plate butted with the pressure strip 101 is arranged on the bearing bracket 104, an arc bearing groove 105 matched with the arc pressing groove 102 is formed in the bearing plate, and the arc pressing groove 102 and the arc bearing groove 105 are matched to form a placing cavity for placing the low-temperature heat-insulation gas cylinder 5.

The high-low position adjusting mechanism comprises a vertical adjusting pipe 304, the pipe orifice of the adjusting pipe 304 is arranged downwards, the upper end of the adjusting pipe 304 is fixedly connected with a sliding block 303, and the lower end of the adjusting pipe 304 is slidably sleeved on the lifting column 301.

The locking device comprises a locking screw hole arranged on the pipe wall of the adjusting pipe 304 and a locking screw 305 for locking the lifting column 301 through the locking screw hole. The distance between the bottom of the lifting column 301 and the pit 6 can be adjusted up and down by loosening the locking screw 305, and the locking screw 305 is tightened to abut against the outer surface of the lifting column 301 to realize the positioning and locking of the adjusting pipe 304 and the lifting column 301.

Referring to fig. 4, the heating mechanism 4 includes a plurality of flame spray heads 401 for heating a circle of the edge of the pit 6, the flame spray heads 401 are connected to a mixture supply pipe 402, a clamping device 403 for clamping the mixture supply pipe 402 is provided on the fixing bracket 1, and the clamping device 403 is connected to the fixing bracket 1 through a locking screw 305. The clamping device 403 is opened, the distance from the flame spray nozzle 401 to the edge of the pit 6 can be lengthened or shortened, the locking screw 305 is loosened, the clamping device 403, namely the arrangement angle of the mixed gas supply pipe 402 can be adjusted, the position of the flame spray nozzle 401 is changed, and when the flame spray nozzle 401 is adjusted to a proper position above the edge of the pit 6, the locking screw 305 is tightened to lock the position of the flame spray nozzle 401. The heating requirement of pits 6 with different shapes and sizes can be met, and the device is convenient to use, flexible to operate and high in adaptability.

An arc-shaped groove 103 for accommodating the welding point adjusting mechanism 3 is arranged on the pressing plate 101 above the arc-shaped pressing groove 102, and two ends of the arc-shaped groove 103 are connected with the arc-shaped pressing groove 102.