Welding seam heating blanket hanging clamp

Abstract

The utility model provides a welding seam heating blanket hanging clamp, which belongs to the technical field of welding auxiliary devices and comprises two portal frames. The two ends of the cross beam are fixedly connected to the two portal frames correspondingly. The plurality of supports are equidistantly distributed on the cross beam; the cross rod is connected below the lifting device; every two L-shaped blocks form a group, and the L-shaped blocks are fixedly connected to the two sides of the cross rod through bolts; the short rod is arranged below the cross rod, and the position of the short rod corresponds to the position of the L-shaped block; the number of the hanging assemblies is consistent with that of the short rods, and the hanging assemblies are arranged on the short rods; the steel wire rope is connected with the short rod through the suspension assembly; the flexible heating blanket is connected with the steel wire rope; the at least three temperature sensors are arranged on the flexible heating blanket; the at least three pressure sensors are arranged on the flexible heating blanket; the temperature sensor is arranged and used for measuring the temperature of the weld joint in the preheating process; a pressure sensor is arranged for judging whether the flexible heating blanket is tightly attached to the welded pipe or not.

Description

Technical Field

[0001] The utility model relates to the technical field of welding auxiliary devices, in particular to a welding seam heating blanket hanging fixture. Background Art

[0002] In recent years, the application of large-diameter straight seam submerged arc welded pipes has been expanded to many fields. In addition to pipelines, it has also developed in the direction of special ships such as offshore drilling and oil production platforms, offshore floating cranes and other marine structures and thermal power generation units. As a pipe for marine structures, large-diameter straight seam welded pipes have obvious advantages, such as uniform wall thickness, simple process, low cost, less performance affected by the pipe making process, easy to achieve high strength and high toughness requirements, and flexible specification adjustment to meet the requirements of different pipe diameters. However, the service environment of marine structure pipes is different from that of land fluid transportation pipes. In addition to bearing working stress, marine structure pipes must also withstand environmental stresses such as wind, waves, seawater corrosion, temperature difference and low temperature. Therefore, in practical applications, in addition to requiring general pipeline performance, marine structure pipes also have higher requirements for their strength, toughness and corrosion resistance. Low-alloy, large-wall thickness, high-grade welded steel pipes have gradually become the development direction. Before welding low-alloy welded pipes and pressure vessel pipelines, in order to reduce welding residual stress and improve the organization and performance of the weld, the weld groove should be preheated before welding. When producing high-grade welded steel pipes in winter, in order to prevent welding defects, the weld groove must also be preheated before welding. Preheating can control the cooling rate of the weld joint, reduce or avoid the formation of hardened martensite in the heat-affected zone, reduce the hardness of the heat-affected zone, thereby reducing welding stress and helping hydrogen to fully escape from the weld joint.

[0003] Existing preheating devices usually use flexible heating blankets to preheat the welded pipes. However, in actual operation, this method requires manual real-time monitoring of the heating temperature, which is not only time-consuming but also labor-intensive. In addition, it is difficult for operators to accurately judge whether the flexible heating blanket is fully fitted to the welded pipe. If the preheating temperature is insufficient, the performance of the welded pipe cannot be significantly improved. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a welding seam heating blanket hanging fixture, which is convenient for real-time monitoring of the heating temperature and for accurately judging whether the flexible heating blanket and the welding pipe are fully fitted.

[0005] The utility model is achieved in this way:

[0006] A welding seam heating blanket hanging fixture comprises: a gantry, a cross beam, a lifting device, a cross bar, an L-shaped block, a short rod, a hanging assembly, a steel wire rope, a flexible heating blanket, a temperature sensor and a pressure sensor; two gantries are symmetrically arranged; two ends of the cross beam are respectively fixedly connected to the two gantries; a plurality of lifting devices are equidistantly distributed on the cross beam; the cross bar is connected to the bottom of the lifting device; a plurality of L-shaped blocks are arranged in groups of two, and the L-shaped blocks are fixedly connected to both sides of the cross bar by bolts; the short rod is arranged under the cross bar, and the position of the short rod corresponds to the position of the L-shaped block; the number of hanging assemblies is consistent with the number of short rods, and the hanging assemblies are arranged on the short rods; the steel wire rope is connected to the short rod through the hanging assembly; the flexible heating blanket is connected to the steel wire rope; at least three temperature sensors are arranged on the flexible heating blanket; at least three pressure sensors are arranged on the flexible heating blanket.

[0007] In addition, a welding seam heating blanket hanging fixture in the above technical solution provided by the utility model may also have the following additional technical features:

[0008] In the above technical solution, the suspension assembly includes: an upper groove, a T-bolt, a lower groove, a T-nut and a screw eye; the upper groove is opened on the short rod; two T-bolts are respectively slidably connected to the two ends of the upper groove, and the short rod is fixedly connected to the L-shaped block through the T-bolts; the lower groove is opened on the short rod; multiple T-nuts are fixedly connected to the inner wall of the lower groove; the number of screw eyes is the same as that of T-nuts, and the screw eyes are threadedly connected to the T-nuts.

[0009] In the above technical solution, the number of steel wire ropes is consistent with the number of screw eyelets, and two heart-shaped rings are formed at both ends of the steel wire rope through a wire locker, and one of the heart-shaped rings is connected to the screw eyelet.

[0010] In the above technical solution, a plurality of hanging rings are provided on the flexible heating blanket, and the hanging rings are connected to another heart-shaped ring.

[0011] In the above technical solution, a plurality of temperature sensors are equidistantly distributed on the flexible heating blanket, and one of the temperature sensors is located in the middle of the flexible heating blanket, and the other two temperature sensors are located on both sides of the flexible heating blanket.

[0012] In the above technical solution, a plurality of pressure sensors are equidistantly distributed on the flexible heating blanket, and one of the pressure sensors is located in the middle of the flexible heating blanket, and the other two pressure sensors are located on both sides of the flexible heating blanket.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. A crossbeam is fixedly connected between two gantries, and lifting devices are evenly distributed on the crossbeam. A crossbar is fixedly connected below the lifting device. Two L-shaped blocks symmetrically arranged on both sides of the crossbar are set as a group, and the short rod is fixedly connected to the crossbar through multiple groups of L-shaped blocks. Then one end of the wire rope is connected to the short rod through a connecting assembly, and the other end of the wire rope is connected to the flexible heating blanket. Then the lifting device can drive the flexible heating blanket to contact the welded pipe to preheat the welded pipe. Therefore, the flexible heating blanket can preheat the welds of straight seam submerged arc welded pipes of different calibers before welding.

[0015] 2. A temperature sensor is provided to measure the temperature of the weld during the preheating process; a pressure sensor is provided to determine whether the flexible heating blanket is in close contact with the weld pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of a welding seam heating blanket hanging fixture of the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of a welding seam heating blanket hanging fixture of the utility model;

[0019] Figure 3 It is a front view of the partial structure of a welding seam heating blanket hanging fixture of the utility model;

[0020] Figure 4 It is a left view of the partial structure of a welding seam heating blanket hanging fixture of the utility model;

[0021] Figure 5 for Figure 3 A magnified view of the structure at center;

[0022] Figure 6 for Figure 3 Enlarged view of the structure at point B in the middle.

[0023] In the figure: 100, gantry; 110, crossbeam; 120, lifting device; 130, crossbar; 140, L-shaped block; 150, short rod; 200, suspension assembly; 210, upper groove; 220, T-bolt; 230, lower groove; 240, T-nut; 250, screw eye; 300, wire rope; 310, heart ring; 400, flexible heating blanket; 410, eye; 500, temperature sensor; 600, pressure sensor. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A welding seam heating blanket hanging fixture, such as Figure 1-6 As shown, it includes: a gantry 100, a crossbeam 110, a lifting device 120, a crossbar 130, an L-shaped block 140, a short rod 150, a suspension assembly 200, a wire rope 300, a flexible heating blanket 400, a temperature sensor 500 and a pressure sensor 600; two gantries 100 are symmetrically arranged; both ends of the crossbeam 110 are fixedly connected to the two gantries 100; a plurality of lifting devices 120 are equidistantly distributed on the crossbeam 110. In order to adapt to the preheating of the welds of the straight seam submerged arc welded pipes of different calibers before welding, the lifting device 120 is arranged on the crossbeam 110. This principle is a mature technology and will not be described in detail here; the crossbar 130 is connected to the lifting device 120 ; a plurality of L-shaped blocks 140 are arranged in pairs, and the L-shaped blocks 140 are fixedly connected to both sides of the cross bar 130 by bolts; a short rod 150 is arranged below the cross bar 130, and the position of the short rod 150 corresponds to the position of the L-shaped block 140; the number of suspension components 200 is consistent with the number of short rods 150, and the suspension components 200 are arranged on the short rods 150; the wire rope 300 is connected to the short rod 150 through the suspension component 200; the flexible heating blanket 400 is connected to the wire rope 300; at least three temperature sensors 500 are arranged on the flexible heating blanket 400; at least three pressure sensors 600 are arranged on the flexible heating blanket 400.

[0026] A crossbeam 110 is fixedly connected between two gantries 100, and lifting devices 120 are evenly distributed on the crossbeam 110, and a crossbar 130 is fixedly connected below the lifting device 120, and two L-shaped blocks 140 symmetrically arranged on both sides of the crossbar 130 are set as a group, and the short rod 150 is fixedly connected to the crossbar 130 through multiple groups of L-shaped blocks 140, and then one end of the wire rope 300 is connected to the short rod 150 through the connecting assembly 200, and the other end of the wire rope 300 is connected to the flexible heating blanket 400, and then the lifting device 120 can drive the flexible heating blanket 400 to contact the weld pipe to preheat the weld pipe, so that the flexible heating blanket 400 can preheat the welds of straight seam submerged arc welded pipes of different calibers before welding; a temperature sensor 500 is set to measure the weld temperature during the preheating process; a pressure sensor 600 is set to determine whether the flexible heating blanket 400 is in close contact with the weld pipe.

[0027] In the embodiment of the present utility model, Figure 1-6 As shown, the suspension assembly 200 includes: an upper groove 210, a T-bolt 220, a lower groove 230, a T-nut 240 and a screw eye 250; the upper groove 210 is opened on the short rod 150; two T-bolts 220 are respectively slidably connected to the two ends of the upper groove 210, and the short rod 150 is fixedly connected to the L-shaped block 140 through the T-bolts 220; the lower groove 230 is opened on the short rod 150; multiple T-nuts 240 are all fixedly connected to the inner wall of the lower groove 230; the number of screw eyes 250 is the same as that of T-nuts 240, and the screw eye 250 is threadedly connected to the T-nut 240.

[0028] Specifically, the T-bolt 220 is passed through the upper groove 210 on the short rod 150 and the through hole on the L-shaped block 140, thereby fixing the short rod 150 and the L-shaped block 140, and then connecting the short rod 150 to the cross bar 130, and then 5 T-nuts 240 are evenly distributed inside the lower groove 230 of the short rod 150. Five lower grooves 230 are shown in this figure, and they can also be increased or decreased according to actual conditions. Then, in conjunction with the screw eye 250, it can be connected to the wire rope 300 below, and then the flexible heating blanket 400 is connected to the short rod 150. Therefore, multiple hanging points make the flexible heating blanket 400 more stably suspended and have a stronger load-bearing capacity. During use, the flexible heating blanket 400 is less deformed and has a longer service life.

[0029] In the embodiment of the present utility model, Figure 1-6 As shown, the number of the steel wire ropes 300 is consistent with the number of the screw eyelets 250 , and two ends of the steel wire ropes 300 are formed into two heart-shaped rings 310 through a wire locker, and one of the heart-shaped rings 310 is connected to the screw eyelet 250 .

[0030] Specifically, in order to make the flexible heating blanket 400 have a wider application range, the wire rope 300 is made of flexible material. In order to make the service life of the wire rope 300 longer, the wire rope 300 is protected by a heart ring 310. In order to make the wire rope 300 stable, the wire rope 300 is locked by a wire locker.

[0031] In the embodiment of the present utility model, Figure 1-6 As shown, a plurality of hanging rings 410 are provided on the flexible heating blanket 400 , and the hanging rings 410 are connected to another heart-shaped ring 310 .

[0032] Specifically, the flexible heating blanket 400 has a coverage area of ​​14000mm×400mm. The flexible heating blanket 400 is made of heat-resistant material wrapped with copper wire. The working temperature does not exceed 400°C. The flexible heating blanket 400 has a cross-sectional area of ​​70mm 2 The copper conductor has basalt fiber as the insulating wrapping material on the outside. The copper conductors are coiled in a cluster of two inside the flexible heating blanket 400. When an alternating current is passed through it, an induced alternating magnetic field can be formed. The electromagnetic induction method is used for heating, which has high thermal efficiency, fast heating speed, and a wide temperature control range. It can meet the preheating temperature required for preheating of most straight seam welded pipes. It should be noted that since the flexible heating blanket 400 adopts electromagnetic induction heating, the short rod 150 is an aluminum profile, and the L-shaped block 140, T-bolt 220, screw eye 250, T-nut 240, wire rope 300 and wire locker are all made of non-magnetic aluminum alloy.

[0033] In the embodiment of the present utility model, Figure 1-6 As shown, a plurality of temperature sensors 500 are equidistantly distributed on the flexible heating blanket 400 , and one of the temperature sensors 500 is located in the middle of the flexible heating blanket 400 , while the other two temperature sensors 500 are located on both sides of the flexible heating blanket 400 .

[0034] Specifically, at least three temperature sensors 500 are provided, which may be increased or decreased according to actual conditions. One temperature sensor 500 is located in the middle of the flexible heating blanket 400, and the other two temperature sensors 500 are located 110 mm to the left and right of the flexible heating blanket 400, respectively, for measuring the weld temperature.

[0035] In the embodiment of the present utility model, Figure 1-6 As shown, a plurality of pressure sensors 600 are equidistantly distributed on the flexible heating blanket 400 , and one of the pressure sensors 600 is located in the middle of the flexible heating blanket 400 , while the other two pressure sensors 600 are located on both sides of the flexible heating blanket 400 .

[0036] Specifically, the distance between the pressure sensor 600 and the temperature sensor 500 is 200 mm. At least three pressure sensors 600 are set, and the number can be increased or decreased according to actual conditions. One of the pressure sensors 600 is located in the middle of the flexible heating blanket 400, and the other two pressure sensors 600 are located 110 mm to the left and right of it, respectively, to determine whether the flexible heating blanket 400 is in close contact with the welded pipe.

[0037] It should be noted that the specific models and specifications of the temperature sensor 500 and the pressure sensor 600 need to be selected and determined according to the actual specifications of the device, so they will not be described in detail.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A welding seam heating blanket hanging fixture, characterized in that: include: A gantry, wherein two of the gantry are symmetrically arranged; A crossbeam, the two ends of which are respectively fixedly connected to the two gantries; A lifting device, wherein a plurality of the lifting devices are equidistantly distributed on the crossbeam; A cross bar connected to the lower side of the lifting device; L-shaped blocks, wherein a plurality of L-shaped blocks are arranged in groups of two, and each of the L-shaped blocks is fixedly connected to both sides of the cross bar by bolts; A short rod, wherein the short rod is arranged below the cross rod, and the position of the short rod corresponds to the position of the L-shaped block; Suspension components, the number of which is the same as the number of the short rods, and the suspension components are arranged on the short rods; A steel wire rope connected to the short rod through the suspension assembly; A flexible heating blanket connected to the steel wire rope; Temperature sensors, at least three of which are disposed on the flexible heating blanket; Pressure sensors, at least three of which are arranged on the flexible heating blanket.

2. A welding seam heating blanket hanging fixture according to claim 1, characterized in that: The suspension assembly comprises: An upper groove, wherein the upper groove is formed on the short rod; T-shaped bolts, two of the T-shaped bolts are slidably connected to the two ends of the upper groove respectively, and the short rod is fixedly connected to the L-shaped block through the T-shaped bolts; A lower groove, wherein the lower groove is formed on the short rod; T-shaped nuts, a plurality of the T-shaped nuts are fixedly connected to the inner wall of the lower groove; Screw rings, the number of the screw rings is consistent with the number of the T-nuts, and the screw rings are threadedly connected to the T-nuts.

3. A welding seam heating blanket hanging fixture according to claim 2, characterized in that: The number of the steel wire ropes is consistent with the number of the screw rings, and two ends of the steel wire ropes are formed into two heart-shaped rings through a wire locker, and one of the heart-shaped rings is connected to the screw ring.

4. A welding seam heating blanket hanging fixture according to claim 3, characterized in that: The flexible heating blanket is provided with a plurality of hanging rings, and the hanging rings are connected to another of the heart-shaped rings.

5. The welding seam heating blanket hanging fixture according to claim 1, characterized in that: The plurality of temperature sensors are equidistantly distributed on the flexible heating blanket, one of the temperature sensors is located in the middle of the flexible heating blanket, and the other two temperature sensors are located on both sides of the flexible heating blanket.

6. A welding seam heating blanket hanging fixture according to claim 1, characterized in that: The plurality of pressure sensors are equidistantly distributed on the flexible heating blanket, one of the pressure sensors is located in the middle of the flexible heating blanket, and the other two pressure sensors are located on both sides of the flexible heating blanket.

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