Device for detecting air tightness of welding seam after welding of pressure container

Abstract

The utility model discloses a device for detecting air tightness of a welding seam after welding of a pressure vessel. The device comprises a pressure vessel air tightness detection tool. The tool comprises detection turnover mechanisms which are symmetrically arranged up and down. The detection turnover mechanism comprises end frames arranged on the two sides at intervals, and a plurality of long sliding rails are assembled and connected to the two sides of the end frames respectively; a plurality of supporting rolling assemblies with adjustable intervals are assembled and connected between the long sliding rails, each supporting rolling assembly comprises a supporting wheel frame supported on the side wall of the pressure container, and a plurality of supporting wheels are assembled and connected to the supporting wheel frames; the detection turnover mechanism further comprises a long turnover shaft used for friction turnover of the pressure container, and the long turnover shaft is sleeved with a long friction rubber sleeve. And a motor for driving the long turning shaft to rotate is mounted on the end frame. According to the structure, in the air tightness detection process, whether air leakage occurs at the welding seam position of circumferential welding or not can be fully and conveniently observed in the turning state. The detection mode is labor-saving and high in detection efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure vessels, and particularly relates to an airtightness detection device for weld seams after welding of a pressure vessel. Background Art

[0002] A pressure vessel is a container that can be used under a certain pressure and is mostly applied in the chemical industry as a pressure tank for chemical reactions. Specifically, for specific chemical reactions that need to occur under high pressure, different from conventional kettles and tanks, a pressure vessel needs to maintain high pressure resistance and high airtightness under high pressure.

[0003] Specifically, under high pressure, when the airtightness of a pressure vessel is not high, at this time, the pressure vessel is extremely prone to safety accidents such as explosion and material leakage. Therefore, after the production and processing of a pressure vessel, it is also necessary to detect the airtightness of the pressure vessel. Specifically, after welding, the leaking positions are mostly located at the weld seams. Therefore, the airtightness detection of the weld seams is one of the key links.

[0004] Specifically, after the main body structure of the pressure vessel is welded to the segment head, the annular weld seam is the main part where air leakage occurs. Therefore, in the actual working process, after welding is completed, a certain pressure of air needs to be introduced into the pressure vessel to simulate its high-pressure working environment. And the airtightness is detected by the bubble method. Specifically, a detection glue solution such as foam water is applied along the annular weld seam position. When air leaks from the weld seam position, bubbles are immediately generated, and the airtightness is judged according to the size and quantity of the bubbles.

[0005] However, due to the heavy pressure vessel that can only be placed horizontally, the positions in contact with the ground and close to the ground during the detection process cannot be observed. During the detection process, the container needs to be continuously turned over to fully observe the bubbles on the circumferential weld seam. However, turning over the heavy pressure vessel is rather laborious, and once the turning operation is improper, it is extremely easy to cause the tank body to collide and bump. At the same time, the airtightness detection time is relatively long, and the tank body needs to be repeatedly turned over to ensure that the generation of bubbles is observed without dead angles on the weld seam multiple times in order to more accurately reflect the airtightness.

[0006] Obviously, the currently disclosed detection means is not only very laborious, but also has low detection efficiency, and the container is easily damaged during the process of turning it over. Content of the Utility Model

[0007] Based on the above background, the purpose of the utility model is to provide an airtightness detection device for weld seams after welding of a pressure vessel.

[0008] To achieve the above purposes, the utility model adopts the following technical solutions:

[0009] An airtightness detection device for the weld seam of a pressure vessel after welding, comprising an airtightness detection tooling for the pressure vessel;

[0010] The airtightness detection tooling for the pressure vessel includes a detection turning mechanism arranged symmetrically up and down. During the airtightness detection process, the pressure vessel is positioned between the detection turning mechanisms, and the pressure vessel is turned by the detection turning mechanism to continuously detect the airtightness of the weld seam;

[0011] The detection turning mechanism includes end frames arranged at intervals on both sides, and a number of long slide rails are respectively assembled and connected to both sides of the end frames;

[0012] A number of support rolling components with adjustable spacing are assembled and connected between the long slide rails. The support rolling components include support wheel frames supported on the side wall of the pressure vessel, and a number of support wheels are assembled and connected to the support wheel frames;

[0013] The detection turning mechanism further includes a long turning shaft for frictionally turning the pressure vessel, and a long friction rubber sleeve is sleeved on the long turning shaft;

[0014] A motor for driving the rotation of the long turning shaft is installed on the end frame.

[0015] Preferably, two long slide rails are respectively fixedly connected to the front and rear ends of the end frame;

[0016] A number of pairs of adjusting nuts positioned on both sides of the support wheel frame are threadedly connected to the long slide rails.

[0017] Preferably, the support rolling component at the lower position supports the lower end position of the side wall of the pressure vessel;

[0018] The support rolling component at the upper position supports the upper end position of the side wall of the pressure vessel.

[0019] Preferably, both ends of the long turning shaft are respectively fixedly connected with rotating shafts rotatably connected to the end frame, and the output end of the motor is installed on one of the rotating shafts.

[0020] Preferably, the detection turning mechanisms are lifted and lowered by a lifting mechanism;

[0021] Before loading the pressure vessel, the upper detection turning mechanism is lifted by the lifting mechanism. After loading the pressure vessel, the upper detection turning mechanism is lowered by the lifting mechanism until the long turning shaft abuts against the top of the pressure vessel.

[0022] Preferably, the lifting mechanism includes a number of vertical guide rails fixedly connected to the lower end frame, and the vertical guide rails are slidably connected to the end frame at the upper position;

[0023] The lifting mechanism includes a number of hydraulic cylinders fixedly connected to the lower end frame, and the plunger rod of the hydraulic cylinder is fixedly connected to the end frame at the upper position.

[0024] Preferably, bases fixedly connected with vertical guide rails are respectively and fixedly connected to the end frame at the lower position, and top seats slidably connected with the vertical guide rails are respectively and fixedly connected to the end frame at the upper position;

[0025] Cylinder base seats fixedly connected with the hydraulic cylinders are respectively and fixedly connected to the end frame at the lower position, and plunger rod top seats fixedly connected with the plunger rods of the hydraulic cylinders are respectively and fixedly connected to the end frame at the upper position.

[0026] Preferably, vertical guide rail sliding connections are respectively arranged at the diagonal positions on one side of the end frame;

[0027] Hydraulic cylinders are respectively arranged at the diagonal positions on the other side of the end frame.

[0028] Preferably, a locking nut that supports at the bottom position of the top seat is threadedly connected to the upper end of the vertical guide rail.

[0029] The utility model has the following beneficial effects:

[0030] 1. During the working process, driven by the motor, the long turning shaft at the upper position gives frictional power from the top of the pressure vessel, and synchronously the long turning shaft at the lower position gives frictional power from the bottom of the pressure vessel. With the cooperation of the long turning shafts on both sides, the heavy pressure vessel can be turned over, and the turning speed is controlled to be slowly turned, so as to continuously observe whether the weld position leaks air during the turning process. Since the welding position is circumferentially sealed and welded, during the turning state, it is possible to fully and conveniently observe whether the weld position leaks air. This detection method is not only labor-saving, but also has high detection efficiency, can conveniently detect the weld position without dead angles, and the pressure vessel is in a limited state, so the detection safety is high and the detection efficiency is greatly increased.

[0031] 2. The lifting method of the hydraulic cylinder greatly improves the convenience and safety of detection. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

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

[0034] Figure 2 It is a schematic structural diagram of the lifting mechanism in the embodiment of the present utility model;

[0035] Figure 3 In the embodiment of the present utility model Figure 1 Front view;

[0036] Figure 4 In the embodiment of the present utility model Figure 1 Right view.

[0037] The realization, functional characteristics and advantages of the object of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0040] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0041] Embodiment 1

[0042] As Figures 1-4 shown, a device for detecting the airtightness of a weld after welding of a pressure vessel includes a pressure vessel airtightness detection tooling.

[0043] Specifically, the pressure vessel airtightness detection tooling includes detection turnover mechanisms symmetrically arranged up and down. During the airtightness detection process, the pressure vessel is positioned between the detection turnover mechanisms, and the pressure vessel is turned over by the detection turnover mechanisms to continuously detect the airtightness of the weld.

[0044] In this way, during the detection process, the heavy pressure vessel is flipped by the detection flipping mechanism for up and down position. Since the pressure vessel is flipped, the airtightness condition of the circumferential weld can be fully observed.

[0045] Specifically, the detection flipping mechanism includes end frames 2 arranged at intervals on both left and right sides. A number of long sliding rails 3 are respectively assembled and connected to both sides of the end frame 2. Specifically, two long sliding rails 3 are respectively fixedly connected to the front and rear ends of the end frame 2. The long sliding rail 3 has a threaded structure.

[0046] At the same time, a number of support rolling components with adjustable spacing are assembled and connected between the long sliding rails 3. The support rolling component includes a support wheel frame 4 supported on the side wall of the pressure vessel. A number of support wheels 41 are assembled and connected to the support wheel frame 4.

[0047] Specifically, the support rolling component at the lower position supports the lower end position of the side wall of the pressure vessel; the support rolling component at the upper position supports the upper end position of the side wall of the pressure vessel.

[0048] In this way, during the detection process, the support rolling component at the lower position supports both sides of the pressure vessel to increase the stability of flipping. The support rolling component at the upper position abuts against both sides of the pressure vessel to avoid losing balance during flipping, the pressure vessel being tossed, and then the pressure vessel rolling down, causing a safety accident.

[0049] At the same time, the spacing of the support rolling component is adjustable. During the working process, according to the length of the pressure vessel, the spacing of the support rolling component is adjusted to ensure that the support rolling component can be evenly distributed on both sides of the pressure vessel and ensure the stability of support and limit.

[0050] Specifically, a number of pairs of adjusting nuts 31 positioned on both sides of the support wheel frame 4 are threadedly connected to the long sliding rail 3. During the process of adjusting the spacing, loosen the adjusting nuts 31 positioned on both sides of the support wheel frame 4 (for example, after adjusting one side to the left and the other side to the right, slide and adjust the support wheel frame 4, and then position both sides of the adjusting nut 31).

[0051] The above detection flipping mechanism further includes a long flipping shaft 51 for frictionally flipping the pressure vessel. A long friction rubber sleeve 511 is sleeved on the long flipping shaft 51 (the long friction rubber sleeve 511 is made of rubber material, which is used to increase the friction force and protect the pressure vessel. Similarly, a suitable rubber sleeve is sleeved on the wheel body of the support wheel 41 to protect the pressure vessel in the same way); a motor 5 for driving the long flipping shaft 51 to rotate is installed on the end frame 2.

[0052] Specifically, both ends of the long turning shaft 51 are fixedly connected to rotating shafts rotatably connected to the end frame 2. In the conventional manner disclosed in the prior art, the output end of the motor 5 is installed on the rotating shaft at the right side position. Similar to the existing method, a suitable bearing is installed on the end frame 2, and the motor 5 is fixedly installed on the end frame 2, such as by bolt fastening.

[0053] During the working process, driven by the motor 5, the long turning shaft 51 at the upper position gives frictional power to the top of the pressure vessel, and synchronously the long turning shaft 51 at the lower position gives frictional power to the bottom of the pressure vessel. With the cooperation of the two long turning shafts 51 on both sides, the heavy pressure vessel can be turned over, and the turning speed is controlled to be slowly turned over, so as to continuously observe whether the weld position leaks air during the turning process. Since the welding position is a circumferential sealed weld, during the turning state, it is possible to fully and conveniently observe whether the weld position leaks air. This detection method is not only labor-saving, but also has high detection efficiency, can conveniently detect the weld position without dead angles, and the pressure vessel is in a limited position, so the detection safety is high and the detection efficiency is greatly increased.

[0054] Embodiment 2

[0055] As Figures 1-4 shown, on the basis of the structure of Embodiment 1, the above-mentioned symmetrically arranged detection and turning mechanisms are lifted and lowered by a lifting mechanism.

[0056] Specifically, before loading the pressure vessel 1, the upper detection and turning mechanism is lifted by the lifting mechanism, and the increased space facilitates the loading of the pressure vessel 1. After the pressure vessel is supported on the lower detection and turning mechanism, the upper detection and turning mechanism is lowered until the long turning shaft 51 abuts against the top of the pressure vessel 1. Thus, the turning and locking of the pressure vessel 1 are realized.

[0057] Specifically, the lifting mechanism includes a plurality of vertical guide rails 6 fixedly connected to the lower end frame 2, and the vertical guide rails 6 are slidably connected to the upper end frame 2; correspondingly, bases fixedly connected to the vertical guide rails 6 are respectively fixedly connected to the lower end frame 2, and top seats 61 slidably connected to the vertical guide rails 6 are respectively fixedly connected to the upper end frame 2.

[0058] The number of the vertical guide rails 6 is two, and they are arranged at the diagonal positions of the two side end frames 2.

[0059] Meanwhile, the lifting mechanism includes a number of hydraulic cylinders 7 fixedly connected to the lower end frame 2 (the hydraulic cylinder 7 is a conventional multi-stage telescopic hydraulic cylinder disclosed in the prior art), and the plunger rod of the hydraulic cylinder 7 is fixedly connected to the upper end frame 2. Correspondingly, the lower end frame 2 is respectively fixedly connected with a cylinder base for fixedly connecting the hydraulic cylinder 7, and the upper end frame 2 is respectively fixedly connected with a plunger rod top seat 71 for fixedly connecting the plunger rod of the hydraulic cylinder 7.

[0060] Similarly, the number of hydraulic cylinders 7 is two, and they are arranged at the diagonal positions of the two side end frames 2.

[0061] By arranging at the diagonal positions, the movement of the detection and flipping mechanism during the lifting process is more stable.

[0062] Specifically, after the feeding is completed, the hydraulic cylinders 7 are used to synchronously lower the upper detection and flipping mechanism until the long flipping shaft 51 and the support rolling assembly on the detection and flipping mechanism fully contact and lock the pressure vessel 1, thereby ensuring the safety of the flipping detection.

[0063] The upper end of the vertical guide rail 6 is threadedly connected with a locking nut 62 that supports the bottom of the top seat 61. Specifically, the locking nut 62 is used to adjust the height limit of the descent of the upper detection and flipping mechanism according to the diameter of the pressure vessel 1, so as to prevent the upper detection and flipping mechanism from descending too much and pressing on the pressure vessel 1 with too much force, resulting in deformation of the pressure vessel 1. Specifically, when the upper detection and flipping mechanism slides down to the position where the locking nut 62 is located, it stops descending at this time. At this time, the long flipping shaft 51 and the support rolling assembly contact the pressure vessel 1 with an appropriate contact pressure, and in this way, the protection of the pressure vessel 1 is enhanced.

[0064] The height position of the locking nut is adjustable, so it is possible to detect pressure vessels 1 with different diameters.

[0065] 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 those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A device for detecting air tightness of weld seams after welding of pressure vessels, characterized in that: Including pressure vessel air tightness testing tooling; The pressure vessel air tightness testing tool comprises a testing flip mechanism symmetrically arranged up and down. During the air tightness testing process, the pressure vessel is positioned between the testing flip mechanisms, and the pressure vessel is flipped by the testing flip mechanism to continuously test the air tightness of the weld. The detection flipping mechanism comprises end frames arranged at intervals on both sides, and the two sides of the end frames are respectively equipped with a plurality of long slide rails; A plurality of support rolling assemblies with adjustable spacing are assembled and connected between the long slide rails, and the support rolling assemblies include a support wheel frame supported on the side wall of the pressure vessel, and a plurality of support wheels are assembled and connected on the support wheel frame; The detection flipping mechanism also includes a long flipping shaft for frictionally flipping the pressure vessel, and a long friction rubber sleeve is sleeved on the long flipping shaft; A motor for driving the long flip shaft to rotate is installed on the end frame.

2. The device for detecting air tightness of weld seams after welding of pressure vessels according to claim 1, characterized in that: The front and rear ends of the end frame are respectively fixedly connected to two long slide rails; The long slide rail is threadedly connected with a plurality of pairs of adjusting nuts positioned on both sides of the supporting wheel frame.

3. The device for detecting air tightness of weld seams after welding of pressure vessels according to claim 1, characterized in that: The supporting rolling assembly located at the lower position is supported at the lower end of the side wall of the pressure vessel; The support rolling assembly located at the upper position is supported at the upper end position of the side wall of the pressure vessel.

4. The device for detecting air tightness of weld seams of pressure vessels after welding according to claim 1, characterized in that: The two ends of the long flip shaft are respectively fixedly connected with a rotating shaft rotatably connected to the end frame, and the output end of the motor is installed on one side of the rotating shaft.

5. The device for detecting air tightness of weld seams of pressure vessels after welding according to claim 1, characterized in that: The detection flipping mechanisms are lifted and lowered by a lifting mechanism; Before loading the pressure vessel, the upper detection flipping mechanism is lifted up by the lifting mechanism. After loading the pressure vessel, the upper detection flipping mechanism is lowered by the lifting mechanism until the long flipping shaft contacts the top of the pressure vessel.

6. The device for detecting air tightness of weld seams of pressure vessels after welding according to claim 5, characterized in that: The lifting mechanism includes a plurality of vertical guide rails fixedly connected to the lower end frame, and the vertical guide rails are slidably connected to the end frame at the upper position; The lifting mechanism comprises a plurality of hydraulic cylinders fixedly connected to the lower end frame, and the plunger rods of the hydraulic cylinders are fixedly connected to the end frame at the upper position.

7. The device for detecting air tightness of weld seams of pressure vessels after welding according to claim 6, characterized in that: The lower end frames are respectively fixedly connected with bases fixedly connected with the vertical guide rails, and the upper end frames are respectively fixedly connected with top seats slidably connected with the vertical guide rails; The lower position end frames are respectively fixedly connected with cylinder bases fixedly connected to the hydraulic cylinders, and the upper position end frames are respectively fixedly connected with plug rod top seats fixedly connected to the plug rods of the hydraulic cylinders.

8. The device for detecting air tightness of weld seams of pressure vessels after welding according to claim 7, characterized in that: Vertical guide rails are respectively provided at diagonally opposite positions on one side of the end frame for sliding connection; Hydraulic cylinders are respectively arranged at diagonal positions on the other side of the end frame.

9. The device for detecting air tightness of weld seams of pressure vessels after welding according to claim 7, characterized in that: The upper end of the vertical guide rail is threadedly connected with a locking nut supported at the bottom position of the top seat.

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