Pressure vessel end socket welding device

Abstract

The utility model discloses a pressure vessel end socket welding device which comprises a scalloped segment end socket welding and lowering mechanism, the scalloped segment end socket welding and lowering mechanism comprises a vertical stand column, and a scalloped segment end socket lifting and supporting assembly is fixedly assembled and connected to the top of the vertical stand column. The scalloped segment end socket is suspended and placed on the scalloped segment end socket lifting and supporting assembly; an umbrella-shaped lowering structure is fixedly installed at the upper end of the vertical stand column and comprises a plurality of horizontal rods horizontally and fixedly connected to the vertical stand column, and the outer ends of the horizontal rods are connected with supporting wheels supported on the inner side wall of the scalloped segment sealing head in a hinged mode. The riding wheel comprises a hinged supporting arm hinged to the horizontal rod and a supporting riding wheel rotationally connected to the top of the hinged supporting arm. The umbrella-shaped lowering structure further comprises a traction assembly used for driving the hinged supporting arm to rotate and retract. According to the mode, the defect that in the welding process of the scalloped segment end socket of a curved structure, the scalloped segment end socket is difficult to be put down to be aligned to a welding seam in a suspension mode is greatly overcome.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure vessel welding, and in particular relates to a pressure vessel head welding device. Background Art

[0002] During the production process of the pressure vessel, the main structure of the pressure vessel (a cylindrical structure) and the melon-shaped head with a curved structure are welded together by welding. Specifically, during the welding process, the main structure of the pressure vessel is placed on the material table, and the melon-shaped head with a curved structure is hoisted and placed at the mouth of the container body. However, after the melon-shaped head with a curved structure is hoisted and lowered, it is difficult to smoothly lower it to the mouth of the main structure of the vessel because it is lifted by the wire rope. Specifically, it is difficult for the melon-shaped head with a curved structure to be fixed by the wire rope and kept vertical after being hoisted, thereby ensuring that the welding positions can be aligned.

[0003] Secondly, when the melon-shaped head is lowered close to the mouth of the container body, if the weld position is misaligned, it is difficult to lift the curved melon-shaped head again, and after lifting again, the shaking melon-shaped head is difficult to align and lower. This makes it difficult to keep the relative position between the melon-shaped head and the container body aligned.

[0004] Secondly, when the melon segment head is suspended to a position close to the mouth of the container body, it is difficult to align the welds when it is lowered to the mouth of the container body. At this time, the melon segment head needs to be repeatedly lifted and lowered after the position is corrected.

[0005] Only after repeated attempts can it be ensured that the melon slice head is aligned with the mouth of the container body after being lowered. Utility Model Content

[0006] Based on the above background, the purpose of the utility model is to provide a pressure vessel head welding device.

[0007] In order to achieve the above objectives, the utility model adopts the following technical solutions:

[0008] A pressure vessel head welding device comprises a melon-segment head welding lowering mechanism, wherein the melon-segment head welding lowering mechanism comprises a vertical column, and a melon-segment head lifting support assembly is fixedly assembled and connected to the top of the vertical column. During the welding process, the melon-segment head is suspended and placed on the melon-segment head lifting support assembly;

[0009] An umbrella-shaped lowering structure is fixedly installed on the upper end of the vertical column, and the umbrella-shaped lowering structure includes a plurality of horizontal rods horizontally fixedly connected to the vertical column, and the outer ends of the horizontal rods are connected to supporting wheels supported on the inner side wall of the melon segment head, and the supporting wheels include an articulated supporting arm hinged on the horizontal rod and a supporting supporting wheel rotatably connected to the top position of the articulated supporting arm;

[0010] The umbrella-shaped lowering structure also includes a pulling assembly for driving the hinged bracket arm to rotate and retract;

[0011] During the process of lowering the melon slice head, the pulling assembly pulls the hinged support arm to flip. During the flipping of the support arm, the supporting wheel rolls on the inner wall of the melon slice head; through the supporting rolling of the supporting wheel, the melon slice head is slowly and vertically lowered to the welding position; the welding position is kept aligned.

[0012] Preferably, the melon slice head lifting support assembly includes a lifting column slidably connected to the top position of the vertical column, a spring is sleeved on the lifting column, the top of the lifting column is fixedly connected to a rubber top seat, and the two ends of the spring are respectively fixedly connected to the rubber top seat and the top position of the lifting column.

[0013] Preferably, a vertically arranged hinged portion is integrally formed at the lower end of the hinged support arm, a hinge port is provided at the outer end of the horizontal rod, and the hinged portion is hinged to the hinge port via a fixed pin.

[0014] Preferably, the pulling assembly comprises a pulling cylinder, a pull rod is fixedly connected to the piston rod of the pulling cylinder, a long adjustment opening is provided on the hinged bracket, and the pull rod passes through the long adjustment opening;

[0015] The outer end of the pull rod is threadedly connected with a baffle nut. When the melon-shaped head is supported on the supporting wheel, the hinged support arm is turned outward until the pull rod contacts the baffle nut.

[0016] When the pulling cylinder pulls the pull rod, the support wheel follows the hinged support arm to flip inward. During the inward flipping process, the pull rod slides relative to the long adjustment port; the support wheel rolls on the inner wall of the melon-shaped head, and the melon-shaped head slowly descends. During the descent, it remains vertically lowered to keep the welding position aligned.

[0017] Preferably, the upper end of the vertical column is fixedly connected with an outer annular seat, and an inner annular seat is concentrically arranged with the outer annular seat, and the cylinder barrel of the pulling cylinder is fixedly installed on the outer annular seat and the inner annular seat;

[0018] The piston rod of the pulling cylinder is slidably connected to the outer annular seat.

[0019] Preferably, a long connecting screw is slidably installed between the outer annular seat and the inner annular seat, and the long connecting screw passes through the vertical column;

[0020] Both ends of the long connecting screw are threadedly connected with nuts.

[0021] Preferably, a bottom loading seat is fixedly connected to the bottom of the vertical column, and the bottom loading seat is used for loading the main structure of the pressure vessel;

[0022] The edge of the bottom loading seat is fixedly connected with a plurality of locking structures for locking the main structure of the pressure vessel.

[0023] Preferably, the locking structure comprises an adjusting slide opening provided at the edge of the bottom loading seat, and a sliding screw is fixedly connected in the adjusting slide opening;

[0024] A push plate is slidably connected to the sliding screw;

[0025] The outer end of the sliding screw is threadedly connected with a pushing nut which pushes the pushing plate.

[0026] Preferably, an inner spring is sleeved on the sliding screw, and two ends of the inner spring are respectively fixedly connected to the adjusting slide and the push plate.

[0027] The utility model has the following beneficial effects:

[0028] 1. During the welding process, the melon-shaped support structure is used to temporarily support and place the melon-shaped head. After placement, it is convenient to correct the posture of the melon-shaped head to ensure that it is vertically aligned with the main structure of the welded pressure vessel. Subsequently, the operator turns on the pulling cylinder. Driven by the pulling cylinder, the supporting wheel follows the hinged support arm to flip inside. Under the action of gravity, the melon-shaped head drops vertically to the main structure of the pressure vessel, and the weld is aligned. This method greatly solves the defect that it is difficult to suspend the melon-shaped head during welding to align the weld.

[0029] In addition, the above method enables the melon-shaped head to slowly slide down to the main structure of the pressure vessel through the friction rolling of the supporting wheel, thereby protecting the welding mouth position and ensuring that it will not be deformed due to impact.

[0030] 2. During the working process, the operator locks the main structure of the pressure vessel for loading materials to ensure that it does not shake, such as keeping it fixed during the process of unloading melon slices and sealing. Specifically, the annular push plates are used as locking structures to lock all the push plates against the outer wall of the main structure of the pressure vessel, and then the push nuts are pressed against the outside of the push plates.

[0031] During the welding process, the locking structure is used to greatly improve the stability of the welding, and the accuracy of material cutting is maintained during the cutting of the melon slice head. After positioning, the welding seam is easier to align. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the utility model;

[0034] Figure 2 This is a structural schematic diagram of the umbrella-shaped lowering structure in the embodiment of the utility model;

[0035] Figure 3 It is a schematic diagram of the structure of the hinged support arm flipped and connected to the support wheel in the embodiment of the utility model;

[0036] Figure 4 This is a structural schematic diagram of the melon slice head lifting support assembly in the embodiment of the utility model;

[0037] Figure 5 For the utility model embodiment Figure 1 Schematic diagram of the structure from another perspective.

[0038] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0042] Example 1

[0043] like Figure 1-5 As shown, a pressure vessel head welding device includes a melon-segment head welding lowering mechanism 4, the melon-segment head welding lowering mechanism 4 includes a vertical column 3, the top of the vertical column 3 is fixedly assembled and connected with a melon-segment head lifting support assembly, and during the welding process, the melon-segment head 5 is suspended and placed on the melon-segment head lifting support assembly. Specifically, the melon-segment head lifting support assembly includes a lifting column 47 slidably connected to the top position of the vertical column 3, a spring 451 is sleeved on the lifting column 47, the top of the lifting column 47 is fixedly connected with a rubber top seat 45, and the two ends of the spring 451 are respectively fixedly connected to the rubber top seat 45 and the top position of the lifting column 47. The suspended melon-segment head 5 is supported on the rubber top seat 45, and at this time, the lifting column 47 is pressed down until the lifting column 47 is retracted into the sliding cavity on the vertical column 3.

[0044] After lowering, the melon segment head 5 is close to the pressure vessel body. The melon segment head 5 is supported on the melon segment head lifting support assembly to slowly lower the melon segment head 5 to the mouth of the pressure vessel body to avoid collision and knocking on the mouth during the traditional lifting and lowering process. Secondly, the position of the melon segment head 5 can be pre-corrected before lowering to ensure that the welds are aligned after lowering. Finally, precise vertical lowering can be achieved to ensure that the melon segment head 5 can be accurately aligned with the welding position of the pressure vessel body.

[0045] Specifically, an umbrella-shaped lowering structure is fixedly installed on the upper end of the vertical column 3, and the umbrella-shaped lowering structure includes a plurality of horizontal rods 41 horizontally fixedly connected to the vertical column 3. The outer ends of the horizontal rods 41 are connected with support wheels supported on the inner wall of the melon slice head 5. The support wheels include an articulated support arm 42 hinged on the horizontal rod 41 and a supporting support wheel 421 rotatably connected to the top position of the articulated support arm 42; the umbrella-shaped lowering structure also includes a pulling assembly for driving the articulated support arm 42 to rotate and retract.

[0046] When the melon segment head 5 is suspended and supported on the umbrella-shaped lowering structure, the umbrella-shaped support of the umbrella-shaped lowering structure keeps the melon segment head 5 of the curved structure stably supported. Secondly, the supporting wheels 421 in the umbrella-shaped lowering structure abut against the inner wall of the melon segment head 5, and when all the supporting wheels 421 abut against the support, it indicates that the posture of the melon segment head 5 is correct and supported in a horizontal state.

[0047] During the process of lowering the melon slice head, the pulling assembly pulls the hinged support arm 42 to flip over. During the flipping of the hinged support arm 42, the supporting wheel 421 rolls on the inner wall of the melon slice head 5; through the supporting rolling of the supporting wheel 421, the melon slice head 5 is slowly and vertically lowered to the welding position; the welding position is kept aligned.

[0048] Specifically, the lower end of the articulated support arm 42 is integrally formed with a vertically arranged articulated portion, and the outer end of the horizontal rod 41 is provided with a hinge port, and the articulated portion is hinged to the hinge port through a fixed pin. The pulling assembly includes a pulling cylinder 44, and a pull rod 43 is fixedly connected to the piston rod of the pulling cylinder 44. A long adjustment port is provided on the articulated support arm 42, and the pull rod 43 passes through the long adjustment port; the outer end of the pull rod 43 is threadedly connected with a barrier nut 431, and when the melon slice head 5 is supported on the supporting wheel 421, the articulated support arm 42 is turned outward until the pull rod 43 contacts the barrier nut 431.

[0049] When the melon segment sealing head 5 is lowered, the top of the inner side thereof is supported on the rubber top seat 45 , and the inner side wall of the curved structure is supported on the supporting wheel 421 .

[0050] At this time, all the pulling cylinders 44 are opened synchronously. When the pulling cylinder 44 pulls the pull rod 43, the supporting wheel 421 follows the hinged support arm 42 to flip inward. During the inward flipping process, the pull rod 43 slides relative to the long adjustment mouth; the supporting wheel 421 rolls on the inner wall of the melon slice head 5, and the melon slice head 5 slowly descends. During the descent, it remains vertically lowered to keep the welding position aligned.

[0051] In the above-mentioned method, the melon segment head 5 is temporarily supported and placed by the umbrella-shaped support structure during the welding process. After placement, it is convenient to correct the posture of the melon segment head 5 to ensure that it is vertically aligned with the main structure of the welded pressure vessel. Subsequently, the operator turns on the pulling cylinder 44. Under the drive of the pulling cylinder 44, the supporting wheel 421 follows the hinged support arm 42 to flip inside. Under the action of gravity, the melon segment head vertically descends to the main structure of the pressure vessel supported by the support, and the weld is aligned. This method greatly solves the defect that the melon segment head 5 with a curved structure is difficult to be lowered to the weld alignment by suspension during the welding process.

[0052] In addition, the above method enables the melon-shaped head to slowly slide down to the main structure of the pressure vessel through the friction rolling of the supporting wheel 421, thereby protecting the welding mouth position and ensuring that it will not be deformed due to impact.

[0053] The fixing method of the above cylinder is:

[0054] The upper end of the vertical column 3 is fixedly connected with an outer annular seat 441 and an inner annular seat concentrically arranged with the outer annular seat 441. The cylinder barrel of the pulling cylinder 44 is fixedly installed on the outer annular seat 441 and the inner annular seat; the piston rod of the pulling cylinder 44 is slidably connected with the outer annular seat 441. At the same time, a long connecting screw is slidably installed between the outer annular seat 441 and the inner annular seat, and the long connecting screw passes through the vertical column 3; nuts are threadedly connected at both ends of the long connecting screw.

[0055] Example 2

[0056] like Figure 1-5 As shown, based on the structure of Example 1, the bottom of the vertical column 3 is fixedly connected with a bottom loading seat 1, and the bottom loading seat 1 is used to load the main structure of the pressure vessel; specifically, the edge of the bottom loading seat 1 is fixedly connected with a plurality of locking structures for locking the main structure of the pressure vessel. During the loading process, the main structure of the pressure vessel is first hoisted and then placed on the bottom loading seat 1 (the main structure of the pressure vessel passes through the vertical column 3, and similarly, after welding is completed, the material is hoisted and unloaded).

[0057] At the same time, the locking structure includes an adjustment slide opening provided at the edge of the bottom loading seat 1, a sliding screw 22 is fixedly connected in the adjustment slide opening, a push plate 21 is slidably connected to the sliding screw 22, and a push nut 221 for pushing the push plate 21 is threadedly connected to the outer end of the sliding screw 22. An inner spring 23 is sleeved on the sliding screw 22, and the two ends of the inner spring 23 are fixedly connected to the adjustment slide opening and the push plate 21, respectively.

[0058] During the working process, the operator locks the position of the main structure of the loading pressure vessel to ensure that it does not shake, such as keeping it fixed during the unloading of melon slices and capping. Specifically, the annularly distributed push plates 21 are used as locking structures to lock all the push plates 21 against the outer wall of the main structure of the pressure vessel, and then the push nuts 221 are pressed against the outer side of the push plates 21.

[0059] During the welding process, the locking structure is used to greatly improve the stability of the welding, and the accuracy of material cutting is maintained during the cutting of the melon slice head. After positioning, the welding seam is easier to align.

[0060] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A pressure vessel head welding device, characterized in that: It includes a melon segment head welding and lowering mechanism, which includes a vertical column, and the top of the vertical column is fixedly assembled and connected with a melon segment head lifting support assembly. During the welding process, the melon segment head is suspended and placed on the melon segment head lifting support assembly; An umbrella-shaped lowering structure is fixedly installed on the upper end of the vertical column, and the umbrella-shaped lowering structure includes a plurality of horizontal rods horizontally fixedly connected to the vertical column, and the outer ends of the horizontal rods are connected to supporting wheels supported on the inner side wall of the melon segment head, and the supporting wheels include an articulated supporting arm hinged on the horizontal rod and a supporting supporting wheel rotatably connected to the top position of the articulated supporting arm; The umbrella-shaped lowering structure also includes a pulling assembly for driving the hinged bracket arm to rotate and retract; During the process of lowering the melon slice head, the pulling assembly pulls the hinged support arm to flip. During the flipping of the support arm, the supporting wheel rolls on the inner wall of the melon slice head; through the supporting rolling of the supporting wheel, the melon slice head is slowly and vertically lowered to the welding position; the welding position is kept aligned.

2. The pressure vessel head welding device according to claim 1, characterized in that: The melon slice head lifting support assembly includes a lifting column slidably connected to the top position of the vertical column, a spring is sleeved on the lifting column, a rubber top seat is fixedly connected to the top of the lifting column, and both ends of the spring are respectively fixedly connected to the rubber top seat and the top position of the lifting column.

3. The pressure vessel head welding device according to claim 1, characterized in that: A vertically arranged hinged portion is integrally formed at the lower end of the hinged support arm, a hinge port is provided at the outer end of the horizontal rod, and the hinged portion is hinged to the hinge port through a fixed pin shaft.

4. The pressure vessel head welding device according to claim 1, characterized in that: The pulling assembly comprises a pulling cylinder, a pulling rod is fixedly connected to the piston rod of the pulling cylinder, a long adjustment opening is provided on the hinged bracket, and the pulling rod passes through the long adjustment opening; The outer end of the pull rod is threadedly connected with a baffle nut. When the melon-shaped head is supported on the supporting wheel, the hinged support arm is turned outward until the pull rod contacts the baffle nut. When the pulling cylinder pulls the pull rod, the support wheel follows the hinged support arm to flip inward. During the inward flipping process, the pull rod slides relative to the long adjustment port; the support wheel rolls on the inner wall of the melon-shaped head, and the melon-shaped head slowly descends. During the descent, it remains vertically lowered to keep the welding position aligned.

5. The pressure vessel head welding device according to claim 4, characterized in that: The upper end of the vertical column is fixedly connected with an outer annular seat, and an inner annular seat is concentrically arranged with the outer annular seat, and the cylinder barrel of the pulling cylinder is fixedly installed on the outer annular seat and the inner annular seat; The piston rod of the pulling cylinder is slidably connected to the outer annular seat.

6. The pressure vessel head welding device according to claim 5, characterized in that: A long connecting screw is slidably installed between the outer annular seat and the inner annular seat, and the long connecting screw passes through the vertical column; Both ends of the long connecting screw are threadedly connected with nuts.

7. The pressure vessel head welding device according to claim 1, characterized in that: The bottom of the vertical column is fixedly connected with a bottom loading seat, and the bottom loading seat is used for loading the main structure of the pressure vessel; The edge of the bottom loading seat is fixedly connected with a plurality of locking structures for locking the main structure of the pressure vessel.

8. The pressure vessel head welding device according to claim 7, characterized in that: The locking structure comprises an adjusting slide opening provided at the edge of the bottom loading seat, and a sliding screw is fixedly connected in the adjusting slide opening; A push plate is slidably connected to the sliding screw; The outer end of the sliding screw is threadedly connected with a pushing nut which pushes the pushing plate.

9. The pressure vessel head welding device according to claim 8, characterized in that: An inner spring is sleeved on the sliding screw rod, and two ends of the inner spring are respectively fixedly connected to the adjusting sliding port and the push plate.

Images