CN210548766U - Back gas automatic protection device during welding of circumferential weld of low-temperature liquid storage tank - Google Patents
Back gas automatic protection device during welding of circumferential weld of low-temperature liquid storage tank Download PDFInfo
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- CN210548766U CN210548766U CN201920998095.9U CN201920998095U CN210548766U CN 210548766 U CN210548766 U CN 210548766U CN 201920998095 U CN201920998095 U CN 201920998095U CN 210548766 U CN210548766 U CN 210548766U
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Abstract
Gaseous automatic safety device in back when low temperature liquid storage tank girth weld welds relates to low temperature liquid storage tank welding auxiliary device field. The gas protection device is designed for mainly solving the problems that the existing back gas protection device cannot be folded and cannot complete gas protection. The tank body support comprises a support connecting rod, and a connecting rod sleeve is welded at the end part of the support connecting rod; a connecting rod hinged support is welded on the connecting rod sleeve and connected with a folding bracket, the folding bracket is connected with a tank body supporting rod through a positive and negative buckle thread adjusting sleeve, the other end of the tank body supporting rod is connected with a spherical hinge, and the spherical hinge is arranged in the hinged support; the gas hood support comprises a back gas hood, the lower end of a gas hood connecting rod is connected with a gas hood adjusting forward and backward threaded inner sleeve, the lower end of the gas hood adjusting forward and backward threaded inner sleeve is connected with a gas hood supporting rod, the lower end of the gas hood supporting rod is connected to a bearing disc seat, and a balance weight is arranged at the lower end of a balance weight rod connected to the bearing disc seat. The beneficial effects are that collapsible, can accomplish the gas protection.
Description
The technical field is as follows:
the utility model relates to a low temperature liquid storage tank welding auxiliary device technical field especially relates to a gaseous automatic safety device in back when low temperature liquid storage tank girth weld is welded.
Background art:
the inner cylinder body and the end enclosure of the low-temperature liquid storage tank are made of 304 stainless steel plates, the welding of the circumferential weld is performed by an automatic welding process of PAW + TIG single-side welding and double-side forming, and after the parameters of the welding process are adjusted, the forming of the back side of the circumferential weld is mainly determined by the protection condition of back side welding gas. If the gas protection of the back is not good, welding defects such as intermittent welding beading, incomplete fusion, blackened welding seams and the like can appear on the back of the welding seam, the welding quality and the corrosion resistance of stainless steel are seriously influenced, and the repair workload is large and the efficiency is low directly. Chinese patent grant publication No. CN 101456098B, grant publication date 2011 year 02 month 02 date, invention name: the invention discloses a method for welding a circumferential seam of a container cylinder by plasma welding, which is characterized in that a lower protective cover is arranged on the back of the welding seam and is placed on a tool which can automatically align with a welding position in a cylinder, so that the purpose of gas protection during the welding of the circumferential seam of the container cylinder is automatically and continuously finished. However, the invention still has the following defects in the using process: 1) the invention is only suitable for the automatic protection of the gas on the back of the circumferential weld before the cylinder body and the end socket at one end are folded and sealed, and after the cylinder body and the end socket at the other end are folded and sealed, the invention can not enter the cylinder body after being sealed because 3 supporting rods can not be folded, so that the gas protection can not be carried out when the back of the circumferential weld of the last cylinder body and the end socket at the other end is welded, and the application range is limited; 2) according to the invention, only one group of 3 support rods supports the gas transmission or water transmission pipe provided with the lower protection cover in the circumferential direction, although the lower protection cover keeps a vertical balance state at the upper end part and the lower end part of the gas transmission or water transmission pipe through a counterweight hammer arranged at the lower end of the gas transmission or water transmission pipe, the gas transmission or water transmission pipe is arranged on the support shaft, so that the structure is in a cantilever beam structure state, a welding gun is not fixed at a position of 12 points during welding at the back of a girth weld, a cylinder body is required to be rotated on a roller frame for welding, therefore, the 3 support rods can be kept in a fixed state only by large tightening force, the defect of the inner surface of the cylinder body is easily caused due to large tightening force, otherwise, the balance stable state of the invention is easily lost due to small tightening force; 3) the lower protective cover is arranged along the longitudinal axis direction of the cylinder, the gas or water pipe joint is arranged at one side of the lower protective cover along the longitudinal axis direction of the cylinder, and the phenomenon of uneven gas distribution in the lower protective cover is easily caused after protective gas enters the lower protective cover. Therefore, a technical solution is needed to solve the above problems.
The invention content is as follows:
the utility model aims to solve the technical problem that an automatic protection device of back gas when welding of cryogenic liquids storage tank girth weld is provided solves the not enough problem of the former above-mentioned in the middle ring welding seam back of current cryogenic liquids storage tank, makes the gas protection of back welding seam reach ideal protection state.
In order to achieve the above object, the utility model adopts the following technical scheme:
it supports the gas hood by jar body and supports two parts and constitute, for avoiding causing pollution, rust to the stainless steel jar body, the utility model discloses whole gaseous automatic safety device major structure all adopts the preparation of stainless steel 304 material.
The tank body support comprises a support connecting rod, the support connecting rod is arranged in a slender shaft shape, two end parts of the support connecting rod are respectively provided with a connecting rod stepped shaft and an external thread, the two end parts of the support connecting rod respectively penetrate through central holes of two connecting rod sleeves which are arranged in a disc shape, the two connecting rod sleeves are respectively fixedly welded at the two end parts of the support connecting rod, the stepped shafts at the two ends of the support connecting rod respectively penetrate through a bearing inner ring and a spacer sleeve and then are locked by a locking round nut, so that the two ends of the support connecting rod are tightly matched and installed in the bearing inner ring holes, the stepped shafts at the two ends of the support connecting rod are respectively axially positioned through stepped shaft shoulders, the spacer sleeve;
the welding that is the circumference trisection on the connecting rod sleeve circumference lateral surface that is located the front end has three connecting rod hinged-support respectively, is corresponding the welding that is the circumference trisection with front end connecting rod hinged-support on the connecting rod sleeve circumference lateral surface that is located the rear end has another three connecting rod hinged-support, and every connecting rod hinged-support all is connected with folding support through the hinge pin axle hinge, wherein: the folding bracket hinged at the front end can be folded backwards, the folding bracket hinged at the rear end can be folded forwards, a positioning bolt is arranged at the end corner of the connecting rod hinge support at the rear side of the folding bracket at the front end, and positioning bolts are arranged at the end corners of the two hinge supports at the front side of the folding bracket at the rear end;
the other end of every folding support all threaded connection have positive and negative knot screw thread adjusting collar, and every positive and negative knot screw thread adjusting collar other end all reverse threaded connection has a jar body bracing piece, and the other end of every jar body bracing piece all threaded connection has a ball pivot, the ball pivot passes through the bolt package in free bearing, free bearing apron, wherein: the shape of the bottom surface of the hinged support is an arc-shaped section which is consistent with the shape of the cross section of the circumferential inner side of the cylinder body; the positive and negative thread adjusting sleeve is hexagonal;
the gas hood support comprises a back gas hood, the back gas hood is arranged in a cuboid with an upper opening cavity and is arranged at the top of the center of the inner side of the barrel along the back of a circumferential weld, the shape of the upper edges of the front side edge and the back side edge of the circumferential weld is an arc-shaped cross section consistent with the shape of the cross section of the inner side of the barrel in the circumferential direction, spring screws are respectively welded at four end angles of the lower side surface of the back gas hood in the vertical direction, high-temperature refractory rock wool is arranged at the contact part of the back gas hood and the back of the circumferential weld, each spring screw is sleeved with a compression spring, and air inlet pipes which are through to the cavity of the back gas hood are respectively welded at the middle parts of the;
the lower end of the air inlet pipe penetrates through horizontally arranged spring pressing plates respectively and then is connected with an air pipeline, through holes corresponding to spring screws are processed at four end corners of each spring pressing plate in the vertical direction respectively, the lower ends of the spring screws penetrate through the spring pressing plates respectively and then are locked through spring nuts, compression springs are packaged between the lower side surface of the back air cover and the spring pressing plates, the spring pressing plates are in a vertically movable state on the sleeved air inlet pipe, and air cover connecting rods are welded in the middle of the lower side surface of each spring pressing plate in the vertical direction;
the lower end of the gas hood connecting rod is in threaded connection with a gas hood adjusting positive and negative thread sleeve, the lower end of the gas hood adjusting positive and negative thread sleeve is in vertical direction and is in reverse threaded connection with a gas hood supporting rod, the lower end of the gas hood supporting rod is in vertical direction and is in threaded connection with the upper end part of the circumferential side surface of a bearing disc seat, the bearing disc seat is in disc-shaped vertical arrangement, the lower end part of the circumferential side surface and the symmetrical part of the upper end part in threaded connection with the gas hood supporting rod are in vertical direction and are in threaded connection with a counterweight rod, and the; the gas hood adjusting positive and negative thread inner thread sleeve is hexagonal;
the bearing is installed in the center hole of the bearing disc seat in a tight fit mode, the bearing rotation center is overlapped with the rotation center of the barrel, two side faces of the outer ring of the bearing are positioned and fixedly installed on the bearing disc seat through pressing plates on two sides and bolts respectively, and the connecting rod stepped shaft at the front end part of the support connecting rod supported by the tank body is installed in the hole of the inner ring of the bearing in a tight fit mode.
The utility model has the advantages that: the tank body support of the device is provided with 6 tank body support rods which are supported on the inner wall of the tank body, the tank body support rods can adjust the inner threaded rods through the positive and negative buckles, so that the tank body support rods are lengthened or shortened and are tightly attached to the tank body through the spherical hinges, and the folding is realized through the folding bracket; compression springs symmetrically arranged below the back gas hood prop against the back gas hood to enable the back gas hood to be tightly attached to the tank body, and the positive and negative rotating gas hoods are used for adjusting the height of the positive and negative buckle inner threaded rods; the gas hood supporting rod is in tight fit connection with the connecting rod stepped shaft through a bearing, and a gas hood counterweight is arranged at the lower end of the counterweight rod, so that the back gas hood is always in a vertical upward state and a welding position; the back gas hood protective cover can simultaneously supply gas by 2 gas inlet pipes so as to ensure that the gas in the back gas hood is uniformly distributed, the back of the circumferential weld of the tank body is silvery white, the weld bead is uniform and continuous, manual operation in the tank is completely not needed during welding, and meanwhile, the automatic gas protective device can be popularized to the circumferential weld of other pressure vessels formed by single-side welding and double-side forming.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention;
3 FIG. 3 2 3 is 3 a 3 schematic 3 view 3 of 3 the 3 cross 3- 3 sectional 3 structure 3 A 3- 3 A 3 of 3 FIG. 3 1 3; 3
FIG. 3 is an enlarged view of the structure at B in FIG. 2;
fig. 4 is a schematic structural view of the bracket of the utility model when folded;
in the figure: 1-back gas hood, 2-compression spring, 21-spring pressure plate, 22-spring nut, 23-spring screw, 3-gas hood connecting rod, 4-gas hood adjusting positive and negative thread sleeve, 5-gas hood supporting rod, 6-bearing disc seat, 61-bearing, 62-locking round nut, 63-pressure plate, 64-spacer sleeve, 7-gas hood counterweight, 71-counterweight rod, 8-tank supporting rod, 81-ball hinge, 82-hinge seat, 83-hinge seat cover plate, 9-positive and negative thread adjusting sleeve, 10-folding bracket, 11-bracket connecting rod, 111-connecting rod stepped shaft end, 112-connecting rod sleeve, 113-connecting rod hinge seat, 114-positioning bolt, 115-hinge pin shaft, 12-front gas hood, 13-welding gun, 14-air inlet pipe, 15-electric roller frame, 16-cylinder, 17-circumferential weld, 18-end enclosure and 19-high-temperature refractory rock wool.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.
It should be noted that "up", "down", "left", "right", "front" and "back" are merely exemplary directions defined for convenience of describing the present invention, and as shown in fig. 1, the upper direction of the paper surface is "up", the lower direction of the paper surface is "down", the left direction of the paper surface is "left", the right direction of the paper surface is "right", the rear direction of the paper surface is "back", and the front direction of the paper surface is "front". Of course, those skilled in the art will understand that other directions such as "up", "down", "left", "right", "front", "back", etc. may be defined in other ways, and also fall within the scope of the present invention.
As shown in fig. 1-4, the automatic protection device for gas on the back surface during welding of the circumferential weld of the cryogenic liquid storage tank is composed of a tank support and a gas shield support, and is used for avoiding pollution and rusting on the stainless steel tank body, and the main structure of the automatic protection device for gas is made of stainless steel 304.
The tank body support comprises a support connecting rod 11, the support connecting rod 11 is arranged in a slender shaft shape, two end parts of the support connecting rod 11 are respectively provided with a connecting rod stepped shaft 111 and an external thread, the two end parts of the support connecting rod respectively penetrate through central holes of two connecting rod sleeves 112 arranged in a disc shape, the two connecting rod sleeves 112 are respectively fixedly welded at the two end parts of the support connecting rod 11, the stepped shafts 111 at the two ends of the support connecting rod respectively penetrate through an inner ring of a bearing 61 and a spacer sleeve 64 and then are locked by a locking round nut 62, so that the two ends of the support connecting rod are tightly matched and installed in the inner ring holes of the bearing 61, the stepped shafts at the two ends of the support connecting rod are respectively axially positioned through a shoulder of the stepped shaft 111, the;
three connecting rod hinge supports 113 are welded on the circumferential outer side surface of the connecting rod sleeve 112 at the front end in a circumferential trisection manner respectively, another three connecting rod hinge supports 113 are welded on the circumferential outer side surface of the connecting rod sleeve 112 at the rear end in a circumferential trisection manner corresponding to the connecting rod hinge supports 113 at the front end in a circumferential trisection manner, and each connecting rod hinge support 113 is hinged with the folding support 10 through a hinge pin shaft 115, wherein: the folding bracket 10 hinged at the front end can be folded backwards, the folding bracket 10 hinged at the rear end can be folded forwards, a positioning bolt 114 is arranged at the end corner of the connecting rod hinge support at the rear side of the folding bracket at the front end, and positioning bolts are arranged at the end corners of the two hinge supports at the front side of the folding bracket at the rear end;
the other end of every folding support all threaded connection have positive and negative knot screw thread adjusting collar 9, and every positive and negative knot screw thread adjusting collar other end all reverse threaded connection has a jar body bracing piece 8, and the other end of every jar body bracing piece all threaded connection has ball pivot 81, ball pivot 81 passes through the bolt package in free bearing 82, free bearing apron 83, wherein: the shape of the bottom surface of the hinged support 82 is set to be an arc-shaped section consistent with the shape of the circumferential inner cross section of the cylinder body; the positive and negative thread adjusting sleeve is hexagonal;
the gas hood support comprises a back gas hood 1, the back gas hood 1 is arranged in a cuboid shape with an upper opening cavity and is arranged at the top of the inner side center of the barrel 16 along the back of a circumferential weld 17, the shape of the upper edges of the front side edge and the back side edge of the circumferential weld 17 of the back gas hood is an arc-shaped cross section consistent with the shape of the inner side cross section of the barrel in the circumferential direction, spring screws 23 are respectively welded at four end angles of the lower side surface of the back gas hood in the vertical direction, high-temperature refractory rock wool 19 is arranged at the back contact part of the back gas hood and the circumferential weld, a compression spring 2 is sleeved on each spring screw 23, and air inlet pipes 14 which are through in the cavity of the back gas hood are respectively welded at the middle parts of the;
the lower end of the air inlet pipe 14 penetrates through a horizontally arranged spring pressing plate 21 and then is connected with an air pipeline, through holes corresponding to spring screws 23 are processed at four end corners of the spring pressing plate 21 in the vertical direction respectively, the lower ends of the spring screws 23 penetrate through the spring pressing plate 21 respectively and then are locked through spring nuts 22, compression springs are packaged between the lower side surface of the back air cover and the spring pressing plate 21, the spring pressing plate is in a vertically movable state on the sleeved air inlet pipe 14, and an air cover connecting rod 3 is welded in the middle of the lower side surface of the spring pressing plate 21 in the vertical direction;
the lower end of the gas hood connecting rod 3 is in threaded connection with a gas hood adjusting positive and negative thread sleeve 4, the lower end of the gas hood adjusting positive and negative thread sleeve is in vertical direction and reverse threaded connection with a gas hood supporting rod 5, the lower end of the gas hood supporting rod 5 is in vertical direction and threaded connection with the upper end part of the circumferential side surface of a bearing disc seat 6, the bearing disc seat is in disc-shaped vertical arrangement, the lower end part of the circumferential side surface and the symmetrical part of the upper end part in threaded connection with the gas hood supporting rod are in vertical direction and threaded connection with a balance weight rod 71, and the lower end part of the balance; the gas hood adjusting positive and negative thread inner thread sleeve is hexagonal;
a bearing 61 is installed in a central hole of a bearing disc seat in a tight fit mode, the rotation center of the bearing 61 is overlapped with the rotation center of the barrel 16, two side faces of the outer ring of the bearing 61 are positioned and fixedly installed on the bearing disc seat through pressing plates 63 on two sides and bolts respectively, and a connecting rod stepped shaft 111 at the front end portion of a support connecting rod 11 supported by a tank body is installed in an inner ring hole of the bearing 61 in a tight fit mode.
Further, the utility model discloses when using, for guaranteeing back gas hood and barrel, head be in the tight state in top all the time, prevent that the protective gas from spilling over and influencing welding seam back gas protection effect, back gas hood and barrel, head contact site adopt high temperature fire-resistant rock wool to wrap up sealed, adopt the tight back gas hood in compression spring top that only the symmetry set up below the back gas hood to make it hug closely with barrel, head. In order to meet the production requirements of different diameters of the tank body, the height of the back gas hood is adjusted by adjusting the positive and negative thread sleeves with the positive and negative rotating gas hoods between the gas hood connecting rod and the gas hood supporting rod;
in the process of uniformly rotating and welding the tank body cylinder on the electric roller frame, in order to prevent the back gas hood from generating offset due to the rotation influence of the tank body cylinder, so as to reduce the gas protection effect of a back circumferential weld, the gas hood supporting rod is tightly matched and connected with the connecting rod stepped shaft at the end part of the connecting rod of the support through a bearing, and a gas hood counterweight is additionally arranged at the lower end of the counterweight rod below the gas hood supporting rod, so that the back gas hood is always in a vertically upward state and is positioned at the highest welding position;
the gas inlet pipe of the protective gas can enter the tank body through the process manhole, and the gas inlet pipe can be used for supplying gas simultaneously in the back gas cover protective cover, so that the gas in the back gas cover is uniformly distributed.
Furthermore, when the utility model is used, the utility model can only be moved into the tank body or out of the tank body through the process manhole, therefore, the utility model has to consider the characteristics of folding and convenient and fast installation in the tank body; the utility model realizes folding through the folding bracket, the folding bracket overturns through the connecting rod hinged support hinge and is horizontally placed on the bracket connecting rod before the tank body is moved in, the folding bracket overturns to be vertical to the bracket connecting rod after the tank body is moved in, and the folding bracket is positioned and fixed by the positioning bolt; in addition, the gas hood supporting rod and the counterweight rod are detachably connected on the bearing disc seat through threads, so that the gas hood supporting rod and the counterweight rod are also taken into consideration to be moved into the tank body or moved out of the tank body through a process manhole;
the tank body supports are provided with 2 groups in total, each group is provided with 3 tank body support rods which are supported on the inner wall of the tank body, and the included angle between every two adjacent tank body support rods is 120 degrees; in order to meet the production requirements of different diameters of the tank body cylinder, the 3 tank body support rods can be lengthened or shortened through the positive and negative buckle adjusting sleeves and are tightly attached to the tank body cylinder through the spherical hinges in threaded connection with the tank body support rods.
The utility model discloses an installation instructions for use:
firstly, carrying the folded and flatly placed tank body supports into the tank body which is subjected to spot welding assembly through a process manhole, unfolding the folded supports which are respectively folded according to the positions of girth welds, positioning and fixing the folded supports by using positioning bolts, and then rotating the positive and negative thread adjusting sleeves to enable the 6 tank body support rods to tightly prop against the inner wall of the tank body; secondly, the gas hood supporting rod and the balance weight rod are in threaded connection with the bearing disc seat, so that the center line of a circumferential weld is positioned in the center of a gas hood of the back gas hood, then a gas hood balance weight is installed at the lower end of the balance weight rod, the back gas hood is in a vertically upward state, and the forward and reverse rotation gas hood adjusts the forward and reverse threaded sleeve to enable the back gas hood to be tightly attached to the inner wall of the tank body; then when the front side of the circumferential weld is welded, the gas is supplied through the root gas inlet pipe simultaneously, welding shielding gas is introduced into the gas hood facing the back side in advance, and the circumferential weld welding is started after an installer withdraws from the tank body.
Claims (1)
1. Gaseous automatic safety device in back during welding of low temperature liquid storage tank girth weld, characterized by: the device consists of a tank body support and an air hood support;
the tank body support comprises a support connecting rod (11), a connecting rod stepped shaft (111) and an external thread are respectively arranged at two end parts of the support connecting rod, the two end parts of the support connecting rod respectively penetrate through central holes of two connecting rod sleeves (112) which are arranged in a disc shape, the two connecting rod sleeves are respectively fixedly welded at two end parts of the support connecting rod (11), the stepped shafts at two ends of the support connecting rod respectively penetrate through an inner ring of a bearing (61) and a spacer sleeve (64) and then are locked by a locking round nut (62), so that two ends of the support connecting rod are tightly matched and installed in the holes of the inner ring of the bearing, the stepped shafts at two ends of the support connecting rod are respectively axially positioned through a stepped shaft shoulder, the spacer sleeve and the locking round nut;
be on the connecting rod sleeve (112) circumference lateral surface that is the front end and weld three connecting rod hinged-support (113) respectively that the circumference trisection is gone up, be on the connecting rod sleeve circumference lateral surface that is the rear end with corresponding welding that is the circumference trisection of front end connecting rod hinged-support (113) have another three connecting rod hinged-support, every connecting rod hinged-support all has folding support (10) through hinge pin axle (115) hinge connection, wherein: positioning bolts (114) are arranged at the end angles of the connecting rod hinge supports at the rear side of the folding support at the front end, and positioning bolts are arranged at the end angles of the two hinge supports at the front side of the folding support at the rear end;
the other end of every folding support all threaded connection have positive and negative knot screw thread adjusting collar, and every positive and negative knot screw thread adjusting collar other end all reverse threaded connection have a jar body bracing piece (8), and the other end of every jar body bracing piece all threaded connection have ball pivot (81), the ball pivot passes through the bolt package in free bearing (82), free bearing apron (83), wherein: the shape of the bottom surface of the hinged support is an arc-shaped section which is consistent with the shape of the cross section of the circumferential inner side of the cylinder body;
the gas hood support comprises a back gas hood (1), the back gas hood is arranged in a cuboid shape with an upper opening cavity and is arranged at the top of the inner side center of the barrel along the back of a circumferential weld, the shape of the upper edges of the front side edge and the back side edge of the circumferential weld is an arc-shaped cross section consistent with the shape of the inner side cross section of the barrel in the circumferential direction, spring screws (23) are respectively welded at four end angles of the lower side surface of the back gas hood in the vertical direction, high-temperature refractory rock wool (19) is arranged at the contact position of the back gas hood and the back of the circumferential weld, a compression spring (2) is sleeved on each spring screw (23), and air inlet pipes (14) which are through in the cavity of the back gas hood are respectively welded at the middle positions of the;
the lower end of the air inlet pipe penetrates through a horizontally arranged spring pressing plate (21) and then is connected with an air pipeline, through holes corresponding to spring screws (23) are processed at four end corners of the spring pressing plate in the vertical direction respectively, the lower end of each spring screw penetrates through the spring pressing plate and then is locked through a spring nut (22), a compression spring is packaged between the lower side surface of the back air cover and the spring pressing plate, the spring pressing plate is in a vertically movable state on the sleeved air inlet pipe, and an air cover connecting rod (3) is welded in the middle of the lower side surface of the spring pressing plate in the vertical direction;
the lower end of the gas hood connecting rod is in threaded connection with a gas hood adjusting positive and negative thread sleeve (4), the lower end of the gas hood adjusting positive and negative thread sleeve is in vertical direction and is in reverse threaded connection with a gas hood supporting rod (5), the lower end of the gas hood supporting rod is in vertical direction and is in threaded connection with the upper end part of the circumferential side surface of a bearing disc seat (6), the bearing disc seat is in disc-shaped vertical arrangement, the lower end part of the circumferential side surface and the symmetrical part of the upper end part in threaded connection with the gas hood supporting rod are in vertical direction and are in threaded connection with a counterweight rod (71), and the lower end part;
a bearing (61) is installed in a central hole of the bearing disc seat in a tight fit mode, the bearing rotating center is overlapped with the rotating center of the cylinder body, two side faces of the outer ring of the bearing are positioned and fixedly installed on the bearing disc seat through pressing plates (63) on two sides and bolts respectively, and a connecting rod stepped shaft at the front end part of a support connecting rod supported by the tank body is installed in the inner hole of the bearing inner ring in a tight fit mode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920998095.9U CN210548766U (en) | 2019-06-29 | 2019-06-29 | Back gas automatic protection device during welding of circumferential weld of low-temperature liquid storage tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920998095.9U CN210548766U (en) | 2019-06-29 | 2019-06-29 | Back gas automatic protection device during welding of circumferential weld of low-temperature liquid storage tank |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153103A (en) * | 2021-04-17 | 2021-07-23 | 青岛荣潇泰建筑工程有限公司 | Household windproof heat-preservation door body |
| CN115592247A (en) * | 2022-10-24 | 2023-01-13 | 立之力机械（广州）股份有限公司（Cn） | Plasma welding machine for welding tank body |
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2019
- 2019-06-29 CN CN201920998095.9U patent/CN210548766U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113153103A (en) * | 2021-04-17 | 2021-07-23 | 青岛荣潇泰建筑工程有限公司 | Household windproof heat-preservation door body |
| CN113153103B (en) * | 2021-04-17 | 2024-04-12 | 青岛荣潇泰建筑工程有限公司 | Household windproof heat-preserving door body |
| CN115592247A (en) * | 2022-10-24 | 2023-01-13 | 立之力机械（广州）股份有限公司（Cn） | Plasma welding machine for welding tank body |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |