Auxiliary flaw detection device and flaw detection method for circumferential weld of barrel

Abstract

The invention discloses an auxiliary flaw detection device and a flaw detection method for a circumferential weld of a cylinder. The auxiliary flaw detection device comprises a stainless steel hoop, a first hexagon socket head cap screw, a guide rail supporting frame, an engine assembling frame, a first T-shaped plate, a first hexagon head bolt, a nylon single-side rail wheel, a second T-shaped plate, a first hexagon nut, a second hexagon socket head cap screw, a third hexagon socket head cap screw, a second hexagon head bolt and a second hexagon nut. During flaw detection, a to-be-detected barrel is mounted on the engine assembly frame, flaw detection equipment is fixed on the guide rail support frame, the height of the engine assembly frame is adjusted to enable the to-be-detected barrel and the flaw detection equipment to be coaxial, and then the engine assembly frame is moved to the flaw detection equipment to enter the to-be-detected barrel for flaw detection; and adjustment is carried out through a telescopic mechanism on the guide rail supporting frame. The device is easy to machine, low in maintenance cost and convenient to operate, production, manufacturing and detection cost is saved, and the flaw detection requirement of the circumferential weld is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of solid rocket engine manufacturing, and relates to a method and an auxiliary device for detecting a cylinder circumferential weld of an auxiliary flaw detection device, which is used for precise positioning of engine welds, physical axis calibration, and 360° X-ray flaw detection of the cylinder internal circumferential weld. Background Art

[0002] Solid rocket engines use solid materials as propellants, which produce high-temperature and high-pressure combustion gases through combustion. The combustion gases expand and accelerate through the nozzle, converting heat energy into kinetic energy to propel the missile forward. Due to the particularity of the working environment, in-depth research has been conducted at home and abroad on aspects such as engine structural strength, load-bearing capacity, flight distance, missile concealment, guidance accuracy, and safety. The casing is an important component of the engine, and the casing design has also become a part that cannot be underestimated. Naturally, the casing design has become one of the important points for designers. The casing not only has the function of sealing and moisture-proofing, but also can quickly build up a certain pressure in the combustion chamber at the moment of engine ignition, so that the engine can ignite normally. If the casing wall is designed to be too thick, it will shorten the flight time, increase production costs, and reduce the flight performance and maneuverability of the engine. If the shell wall thickness is too thin, the flight time will be extended, the flight distance will be increased, and the overall flight performance of the engine will be improved. However, if the shell wall thickness is too thin, there will be safety hazards, which will seriously cause the shell to explode under pressure. Therefore, the shell design should not be too thick or too thin. Since the shell is spun, the overall smoothness meets the requirements of structure, strength, rigidity, etc. Since the wall thickness is determined by calculation-verification-field test, the weld can only be formed by electron beam, laser and other welding methods, and the quality stability and controllability cannot be accurately quantified to measure the quality characteristics. Therefore, it is particularly important to inspect the quality of the girth weld at the welding of the front and rear heads. In order to realize the independent control of the development and production of the solid rocket engine combustion chamber shell, ensure product quality, provide design data for designers, and assist the flaw detection equipment to detect the process method, it is urgent to solve.

[0003] At present, the invention and utility model patents for the detection method of the cylinder weld include:

[0004] The Chinese invention patent with application number CN202211357980.1 discloses a weld positioning flaw detection system and method. It records that a detection probe is installed on the nozzle unit at the front end of the flaw detection equipment. The detection probe is used to penetrate into the nozzle of the workpiece to be detected for flaw detection. The control unit cooperates with the posture adjustment mechanism, the mechanical arm, the posture detection unit and the positioning system to penetrate the detection probe into the workpiece to be detected for flaw detection; this detection method has certain limitations and does not elaborate on the actual function of the detection equipment, or the detection method is to use the intelligent detection system, the mechanical arm, etc. to penetrate the detection probe into the cylinder for detection, which is not completely applicable to cost saving and other cylinder component detection.

[0005] The Chinese invention patent with application number CN202310541346.1 discloses a titanium alloy cylinder welding device and a titanium alloy cylinder weld detection method, which records that the titanium alloy cylinder welding device includes a welding work platform, welding materials, a non-contact detection mechanism and an auxiliary positioning mechanism, which can achieve accurate positioning and stable fixation of the titanium alloy round tube, thereby reducing the welding quality caused by instability, deformation and other situations during the welding process; and using intelligent auxiliary equipment to perform real-time detection of the weld during the welding process. This measurement method is highly dependent on the stability and accuracy of the system. Although the welding process and quality of the weld can be detected in real time, for welders, it is impossible to completely judge the quality of the weld or the degree of compliance with the design requirements based on the system data.

[0006] The Chinese invention patent with application number CN201610120051.7 discloses an X-ray detection method and device for the longitudinal weld of a small-diameter cylinder. It records that the device is composed of a push rod, a pull rod, a bracket and an elastic support. The bracket is composed of a rotating rod and a support plate fixed on the top of the rotating rod. The pull rod is hinged to the upper end of the rotating rod through a first bolt pair, and the push rod is hinged to the lower end of the rotating rod through a second pair of bolts. There is a pair of positioning holes at the corresponding positions of the pull rod and the push rod, and the elastic support is between the pull rod and the push rod. This patent mainly detects the longitudinal weld of a small cylinder by rotating and pushing the bracket. The scope of use is relatively limited, with obvious pertinence and uniqueness, and does not meet the selection in actual diverse situations.

[0007] In actual work, in order to ensure the quality of product design and the accuracy and correctness of design parameters, a large number of related cylinder internal girth weld welding tests need to be carried out to obtain effective test data. The existing flaw detection tools and methods have certain drawbacks and limitations, and the validity and reference of the obtained data do not meet the design and product needs. Therefore, it is particularly important to study an X-ray flaw detection method and auxiliary flaw detection device suitable for the internal girth weld of the cylinder. On the other hand, repeated testing and design of related tools not only increase the design cost, but also increase the manufacturing and production costs, resulting in a waste of manpower and material resources.

[0008] Based on the above reasons, in order to obtain reliable and effective data, save design time, production and testing costs, ensure product quality and smooth progress of subsequent work, it is necessary to design an auxiliary flaw detection device and method for cylinder girth weld detection. Summary of the invention

[0009] The present invention aims to provide a cylinder girth weld auxiliary flaw detection device and flaw detection method, which can complete the flaw detection and inspection of annular welds at different depths inside a cylinder such as a combustion chamber shell at low cost and high efficiency, and the flaw detection operation is simple and easy, saving time and the device maintenance cost is low.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] A cylinder girth weld auxiliary flaw detection device, comprising:

[0012] The guide rail support frame is mainly composed of a support frame, a support rod, an oblique support rod, a longitudinal beam and a transverse rail, wherein two transverse rails are arranged in parallel and at intervals, and a plurality of longitudinal beams are arranged at intervals between the two transverse rails. The upper end surface of the support frame is provided with an arc groove, the lower end surface of the support frame is connected to the upper end of the support rod, the lower end of the support rod is connected to the longitudinal beam, and there is an oblique support rod on each side of the support rod, and the lower end of the oblique support rod is connected to the transverse rail;

[0013] An engine assembly rack, the engine assembly rack mainly consists of a main frame, a U-shaped bracket, a first T-shaped plate, a second T-shaped plate and a nylon single-sided track wheel, wherein a plurality of U-shaped brackets arranged in a straight line are installed on the upper end surface of the main frame, the U-shaped opening of the U-shaped bracket faces upward, the first T-shaped plate and the second T-shaped plate form a T-shaped structure by a horizontal plate and a vertical plate, a pair of waist-shaped long holes are opened on the vertical plate, and the horizontal plate of the first T-shaped plate is connected to the lower end of the main frame, the vertical plate of the first T-shaped plate is attached to the vertical plate of the second T-shaped plate and connected by a first hexagonal head bolt penetrating through the waist-shaped long holes on the two vertical plates, the horizontal plate of the second T-shaped plate is opened with a waist-shaped hole, the second T-shaped plate is connected to the nylon single-sided track wheel through the waist-shaped hole on the horizontal plate, and the engine assembly rack is installed on the horizontal rail through the nylon single-sided track wheel;

[0014] A stainless steel clamp is located above the arc groove of the support bracket, and both ends of the stainless steel clamp are detachably connected to the upper end surface of the support bracket.

[0015] Furthermore, the cylinder ring weld auxiliary flaw detection device also includes a telescopic mechanism, which is slidably connected to one end of the support frame close to the engine assembly frame, and the upper end surface of the telescopic mechanism is provided with an arc groove for accommodating the flaw detection equipment.

[0016] As a solution, a second hexagonal bolt serving as a nylon single-side track wheel brake structure is also installed on the cross plate of the second T-plate, and the end of the second hexagonal bolt points to the cross rail.

[0017] A cylinder girth weld flaw detection method adopts the above-mentioned auxiliary flaw detection device with a telescopic mechanism and comprises the following steps:

[0018] Step 1: Place the guide rail support frame on a horizontal plane, check and adjust the guide rail support frame until it is in a horizontal state;

[0019] Step 2: Install the flaw detection equipment in the arc groove of the support bracket in the guide rail support frame, and press the flaw detection equipment on the support bracket with a stainless steel clamp;

[0020] Step 3: Assemble the engine assembly frame on the horizontal rail of the guide rail support frame, and adjust the distance between the waist-shaped hole on the horizontal plate of the second T-plate and the installation position of the nylon single-sided track wheel, so that the nylon single-sided track wheel slides smoothly on the horizontal rail and fits the inner wall of the horizontal rail;

[0021] Step 4: Place the cylinder to be tested flat on the U-shaped bracket of the engine assembly stand, ensure that the cylinder to be tested is located in the U-shaped opening of the U-shaped bracket, and ensure that the lengths of both ends of the cylinder to be tested extending out of the U-shaped bracket are consistent;

[0022] Step 5: Confirm whether the axis of the cylinder to be tested on the engine assembly stand and the flaw detection equipment are horizontally consistent. If not, change the fitting length of the first T-plate and the second T-plate vertical plate to adjust the height of the engine assembly stand;

[0023] Step 6: Push the cylinder to be tested horizontally towards the flaw detection equipment, ensuring that they do not touch each other, until the flaw detection equipment enters the cylinder to be tested;

[0024] Step 7: If the detection distance is sufficient, fix the nylon single-sided track wheel to prevent sliding. If the detection distance is insufficient, adjust the relative distance between the flaw detection equipment and the cylinder to be tested through the telescopic mechanism. After adjusting the distance, fix the nylon single-sided track wheel.

[0025] Step 8: Start the flaw detection equipment to perform X-ray flaw detection.

[0026] Further, the cylinder girth weld flaw detection method also includes:

[0027] Step 9: After the flaw detection is completed, the staff will check the flaw detection results. If the flaw detection results are qualified, the data will be output and printed. If the flaw detection results are unqualified, it will be checked whether it is due to the assembly of the cylinder to be tested and the auxiliary flaw detection device or the flaw detection equipment. After eliminating the fault, the flaw detection will be reviewed again;

[0028] Step 10: After the flaw detection is completed, turn off the flaw detection equipment;

[0029] Step 11: Release the fixation of the nylon single-sided track wheel, slowly move the cylinder to be tested away from the flaw detection equipment until the two are completely separated, and remove the cylinder to be tested.

[0030] Compared with the prior art, the flaw detection method and the flaw detection auxiliary device of the present invention can implement effective X-ray flaw detection on the annular weld of the cylinder, which basically solves the problem of detecting welds that are horizontal to the axis of the flaw detection equipment and deeper inside the cylinder. Moreover, the flaw detection method is not only applicable to the cylinder, but also to the same type of products with similar cylinder structure.

[0031] The flaw detection method of the present invention has a simple principle, the flaw detection auxiliary device is easy to process, has low maintenance cost, is easy to operate, and saves production, manufacturing and testing costs. After experimental verification, the flaw detection method and the flaw detection auxiliary device of the present invention can meet the detection requirements of the annular weld inside the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flow chart of the flaw detection method in the present invention;

[0033] Figure 2 It is a schematic diagram of the principle of flaw detection of the annular weld inside the cylinder and the auxiliary device for flaw detection;

[0034] Figure 3 This is the parts drawing of the guide rail support frame;

[0035] Figure 4 It is the parts diagram of the engine assembly frame;

[0036] In the figure: 1-stainless steel clamp; 2-first hexagon socket head screw; 3-guide rail support frame; 4-engine assembly frame; 5-first T-plate 1; 6-first hexagon head bolt; 7-nylon single-sided track wheel; 8-second T-plate; 9-first type 1 hexagon nut; 10-second hexagon socket head screw; 11-third hexagon socket head screw; 12-second hexagon head bolt; 13-second type 1 hexagon nut; 31-support frame; 32-support rod; 33-diagonal brace; 34-longitudinal beam; 35-cross rail; 41-main frame; 42-U-shaped bracket. DETAILED DESCRIPTION

[0037] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0038] like Figure 2 to Figure 4 As shown, it is an auxiliary flaw detection device for the cylinder girth weld, which is mainly composed of a guide rail support frame 3, an engine assembly frame 4, a telescopic structure and a flaw detection device, and also includes a stainless steel clamp 1, a first hexagon socket head screw 2 (M6), a guide rail support frame 3, an engine assembly frame 4, a first T-plate 5, a first hexagon head bolt 6 (M10), a nylon single-sided track wheel 7, a second T-plate 8, a first type 1 hexagon nut 9 (M5), a second hexagon socket head screw 10 (M5), a third hexagon socket head screw 11 (M8), a second hexagon head bolt 12 (M14), and a second type 1 hexagon nut 13 (M14). The following are the functions and uses of each component:

[0039] Stainless steel clamp 1: Stainless steel clamp 1 is used to fix the flaw detection equipment.

[0040] The first hexagon socket head screw 2 (M6) is used to connect the stainless steel clamp 1 and the support bracket 31.

[0041] The guide rail support frame 3 supports the flaw detection equipment and the engine assembly frame 4, restricts the engine assembly frame 4 to slide in the cross rail 35, and adjusts the horizontal forward and backward movement of the cylinder. The guide rail support frame 3 is composed of a support frame 31, a support rod 32, a diagonal support rod 33, a longitudinal beam 34 and a cross rail 35.

[0042] Engine assembly frame 4: The engine assembly frame 4 is used to support the cylinder (combustion chamber housing), slides on the guide rail support frame 3 through the nylon single-sided track wheel 7, and is locked through the second hexagonal head bolt 12 and the second type 1 hexagonal nut 13. The engine assembly frame 4 includes a main frame 41 and a U-shaped bracket 42.

[0043] First T-shaped plate 5 : The first T-shaped plate 5 and the second T-shaped plate 8 are matched and fixed and locked by the first hexagonal bolt 6 , and the first T-shaped plate 5 is connected to the engine assembly frame 4 .

[0044] First hexagonal bolt 6 (M10): After the engine assembly frame 4 is fixed, the first hexagonal bolt 6 (M10) is used to lock the first T-shaped plate 5 and the second T-shaped plate 8 to fix the height. Figure 2 As shown in the partial view in the direction of A in the middle, a waist-shaped long hole is opened at the position where the first T-shaped plate 5 and the second T-shaped plate 8 overlap and fit each other, and the first hexagonal head bolt 6 passes through the waist-shaped long holes of the first T-shaped plate 5 and the second T-shaped plate 8 to connect the two together. By adjusting the position of the first hexagonal head bolt 6 in the waist-shaped long hole, the length of the overlapping position of the first T-shaped plate 5 and the second T-shaped plate 8 can be changed, thereby changing the height of the engine assembly frame 4.

[0045] Nylon single-sided track wheel 7: The nylon single-sided track wheel 7 slides on the guide rail support frame 3 to control the distance between the engine assembly frame 4 and the front and rear of the flaw detection equipment.

[0046] The second T-shaped plate 8: The second T-shaped plate 8 cooperates with the first T-shaped plate 5 and is fixed and locked by the first hexagonal head bolt 6. The second T-shaped plate 8 is connected to the nylon single-sided track wheel 7, and a waist-shaped hole is opened at the connection position. By adjusting the position of the connecting piece located in the waist-shaped hole, it is convenient to adjust the distance between the two nylon single-sided track wheels 7, thereby adapting to the spacing between the two cross rails 35.

[0047] The first type 1 hexagonal nut 9 (M5) is used to fix the nylon single-sided track wheel 7 and the second T-shaped plate 8.

[0048] The second hexagon socket head screw 10 (M5) is used to fix the nylon single-sided track wheel 7 and the second T-shaped plate 8.

[0049] The third hexagon socket head screw 11 (M8) is used to fix the engine assembly frame 4 and the first T-shaped plate 5.

[0050] The second hexagonal head bolt 12 (M14) is used to lock the nylon single-sided track wheel 7 to prevent the wheel from sliding.

[0051] Second type 1 hexagonal nut 13 (M14): locks the hexagonal head bolt 12 (M14);

[0052] The telescopic mechanism is a plate that slides at the lower end of the support bracket 31. On the one hand, the telescopic mechanism realizes sliding cooperation through the guide groove on the lower end surface of the support bracket 31 and the guide rail on the surface of the telescopic mechanism. On the other hand, the upper end surface of the telescopic mechanism is also provided with an arc groove for placing the flaw detection equipment. When the flaw detection equipment enters the cylinder to be tested to a insufficient distance, the telescopic mechanism is slid toward the side of the engine assembly frame 4 so that the flaw detection equipment enters the cylinder to a sufficient distance. The telescopic mechanism can also be installed with a stainless steel clamp 1 to fix the flaw detection equipment, such as Figure 1 .

[0053] like Figure 1 As shown, carefully place the flaw detection equipment in the arc groove of the support bracket 31 in the guide rail support frame 3, press the flaw detection equipment with the stainless steel clamp 1, and fix and tighten it with the first hexagon socket head screw 2 (M6); place the engine assembly frame 4 on the surface of the cross rail 35 of the guide rail support frame 3, ensure that it is level and the two nylon single-sided track wheels 7 can slide freely in the cross rail 35, place the cylinder to be tested in the U-shaped notch of the U-shaped bracket 42 on the engine assembly frame 4, and adjust the axis of the flaw detection equipment and the axis of the cylinder to be tested to be on the same horizontal line.

[0054] like Figure 2 As shown, the support rod 32, the diagonal support rod 33, the longitudinal beam 34 and the cross rail 35 are all made of channel steel. The channel steel must be tested and qualified before it can be used. The surface of the cross rail 35 and the arc groove surface of the support bracket 31 should be slightly machined to ensure that the surface flatness meets the process requirements. The diameter of the arc groove should be ≥ the outer diameter of the flaw detection equipment, and the surface processing is smooth without mechanical burrs and other damage to the equipment. All welding seams on the support bracket 31, support rod 32, diagonal support rod 33, longitudinal beam 34 and cross rail 35 are welded firmly, and the plane processing of the cross rail 35 is processed after all channel steels are welded.

[0055] like Figure 3As shown, the engine assembly frame 4 is mainly composed of a first T-shaped plate 5, a first hexagonal head bolt 6 (M10); a nylon single-sided track wheel 7, a second T-shaped plate 8, a first type 1 hexagonal nut 9 (M5), a second socket hexagonal cylindrical head screw 10 (M5), a third socket hexagonal cylindrical head screw 11 (M8), a second hexagonal head bolt 12 (M14), a second type 1 hexagonal nut 13 (M14), etc. The distance between the nylon single-sided track wheels 7 is measured and mapped according to the actual object at a ratio of 1:1. After the assembly is completed, the engine assembly frame 4 is placed on the cross rail 35 of the guide rail support frame 3 to complete the assembly.

[0056] The principle of using auxiliary flaw detection equipment to detect the girth weld of the cylinder is as follows: the flatness is ensured by processing the surface of the cross rail 35, so that the engine assembly frame 4 can be basically level when sliding on it through the nylon single-sided track wheel 7, and the axis of the flaw detection equipment is adjusted to be level with the axis of the cylinder to be inspected by adjusting the first hexagonal head bolt 6 (M10). After the adjustment is consistent, the engine assembly frame 4 is pushed toward the end of the flaw detection equipment. When the flaw detection equipment probe detects the weld, it stops immediately, and the engine assembly frame 4 is locked by the locking screw (the second hexagonal head bolt 12), and the flaw detection equipment is started to perform 360° girth weld flaw detection (if the probe of the flaw detection equipment does not have a 360° flaw detection function, it is achieved by manually rotating the cylinder 360° in the U-shaped bracket 42); when the cylinder distance is too long during flaw detection, the telescopic mechanism is adjusted to move the flaw detection equipment toward the engine assembly frame to increase the horizontal working distance of the flaw detection. After the flaw detection is completed, the staff confirms the flaw detection results again.

[0057] The flaw detection method of the present invention comprises the following steps:

[0058] Step 1: Place the guide rail support frame 3 on a horizontal plane and check whether it is level;

[0059] Step 2: Install the flaw detection device in the arc groove of the support bracket 31 in the guide rail support frame 3, and press the stainless steel clamp 1 against the flaw detection device, and tighten the stainless steel clamp 1 with the first hexagon socket head screw 2 (M6);

[0060] Step 3: Assemble the engine assembly frame 4 on the horizontal rail 35 of the guide rail support frame 3, and adjust the distance of the nylon single-sided track wheel 7 and whether the sliding is in contact with the inner wall of the horizontal rail 35;

[0061] Step 4: Place the cylinder to be tested flatly in the U-shaped notch of the U-shaped bracket 42 of the engine assembly frame 4, ensuring that the lengths of the two ends of the cylinder to be tested extending out of the U-shaped bracket 42 are substantially the same;

[0062] Step 5: Observe whether the cylinder to be tested on the engine assembly frame 4 is horizontally consistent with the axis of the flaw detection equipment, adjust the first hexagonal head bolt 6 (M10), adjust the upper and lower assembly heights of the engine assembly frame 4, and after adjustment, tighten the first hexagonal head bolt 6 (M10);

[0063] Step 6: Push the cylinder to be tested horizontally toward the flaw detection equipment to ensure that they do not touch each other, and the flaw detection equipment enters the cylinder to be tested;

[0064] Step 7: If the detection distance is sufficient, tighten the first hexagonal bolt 12 to prevent sliding. If the starting distance is insufficient, adjust the telescopic distance of the flaw detection equipment. After adjusting the distance, tighten the first hexagonal bolt 12.

[0065] Step 8: Start the flaw detection equipment to perform X-ray flaw detection;

[0066] Step 9: After the flaw detection is completed, the staff will check the flaw detection results. If the flaw detection results are qualified, the print data will be output. If the flaw detection results are unqualified, check whether it is due to assembly or equipment reasons. After troubleshooting, the flaw detection will be reviewed again;

[0067] Step 10: After the flaw detection is completed, turn off the flaw detection equipment;

[0068] Step 11: Loosen the first hexagonal bolt 12, slowly move the cylinder to be tested in the opposite direction of the flaw detection equipment until the two are completely separated, and remove the cylinder to be tested.

[0069] The present invention has the following characteristics:

[0070] 1. The present invention provides an auxiliary flaw detection device for X-ray detection of the internal circumferential weld of the cylinder. After testing and verification, not only the horizontal axis of the cylinder to be tested and the weld flaw detection equipment is calibrated, but also after design verification, the flaw detection result is accurate and effective, meets the process expectations and design requirements, provides effective measurement data, does not repeat the flaw detection measurement, and reduces the number of uses, saving costs and ensuring product quality.

[0071] 2. The X-ray detection method of the cylinder internal circumferential weld proposed in the present invention detects the cylinder weld quality according to the actual cavity size of the combustion chamber shell, meets the deeper weld detection requirements of such products, saves testing time, and not only ensures the design quality reliability of the weld, but also saves production and testing costs.

[0072] In summary, the flaw detection method and the flaw detection auxiliary device of the present invention have reliable principles, simple operation, convenient transportation, low maintenance costs, and save manufacturing and use costs. They solve the problem that it is difficult to accurately measure the X-ray inside the cylinder and deep welds and to achieve uniform detection of the axis horizontally. They provide data to designers in a timely manner, which is conducive to the smooth development of subsequent work.

[0073] The above is the basic structure of the present invention. The flaw detection method of the present invention is simple, feasible and effective. The flaw detection auxiliary device has a simple structure, saves production and manufacturing costs, is practical and convenient to maintain, and is easy to transport and operate. The flaw detection method is reasonable, which saves time for the overall work and guarantees product quality from the side, saves production and testing costs, and is an economical and practical detection method. All such devices and flaw detection methods designed according to the scheme of the present invention fall within the protection scope of the present invention.

Claims

1. A cylinder girth weld auxiliary flaw detection device, characterized in that: include: A guide rail support frame (3), wherein the guide rail support frame (3) is mainly composed of a support frame (31), a support rod (32), an oblique support rod (33), a longitudinal beam (34) and a transverse rail (35), wherein two transverse rails (35) are arranged in parallel and at intervals, and a plurality of longitudinal beams (34) are arranged at intervals between the two transverse rails (35); an arc groove is formed on the upper end surface of the support frame (31), a lower end surface of the support frame (31) is connected to the upper end of the support rod (32), the lower end of the support rod (32) is connected to the longitudinal beam (34), and an oblique support rod (33) is provided on each side of the support rod (32), and the lower end of the oblique support rod (33) is connected to the transverse rail (35); The engine assembly rack (4) is mainly composed of a main frame (41), a U-shaped bracket (42), a first T-shaped plate (5), a second T-shaped plate (8) and a nylon single-sided track wheel (7), wherein a plurality of U-shaped brackets (42) arranged in a straight line are installed on the upper end surface of the main frame (41), the U-shaped opening of the U-shaped bracket (42) faces upward, the first T-shaped plate (5) and the second T-shaped plate (8) are composed of a horizontal plate and a vertical plate to form a T-shaped structure, and a pair of The first T-shaped plate (5) has a waist-shaped long hole, and the horizontal plate of the first T-shaped plate (5) is connected to the lower end of the main frame (41), the vertical plate of the first T-shaped plate (5) is attached to the vertical plate of the second T-shaped plate (8) and connected by a first hexagonal head bolt (6) penetrating the waist-shaped long holes on the two vertical plates, the horizontal plate of the second T-shaped plate (8) is provided with a waist-shaped hole, the second T-shaped plate (8) is connected to the nylon single-sided track wheel (7) through the waist-shaped hole on the horizontal plate, and the engine assembly frame (4) is installed on the horizontal rail (35) through the nylon single-sided track wheel (7); A stainless steel clamp (1), wherein the stainless steel clamp (1) is located above the arc groove of the support bracket (31), and both ends of the stainless steel clamp (1) are detachably connected to the upper end surface of the support bracket (31).

2. The cylinder girth weld auxiliary flaw detection device according to claim 1, characterized in that: It also includes a telescopic mechanism, which is slidably connected to one end of the support frame (31) close to the engine assembly frame (4), and the upper end surface of the telescopic mechanism is provided with an arc groove for accommodating a flaw detection device.

3. The cylinder girth weld auxiliary flaw detection device according to claim 1, characterized in that: A second hexagonal bolt (12) serving as a braking structure for the nylon single-sided track wheel (7) is also installed on the transverse plate of the second T-shaped plate (8), and the end of the second hexagonal bolt (12) points to the transverse rail (35).

4. A method for flaw detection of cylinder girth weld, characterized in that: The auxiliary flaw detection device according to claim 2 is used, and includes the following steps: Step 1: Place the guide rail support frame (3) on a horizontal plane, check and adjust the guide rail support frame (3) until it is in a horizontal state; Step 2: Install the flaw detection device in the arc groove of the support bracket (31) in the guide rail support frame (3), and press the flaw detection device onto the support bracket (31) with a stainless steel clamp (1); Step 3: Assemble the engine assembly frame (4) on the cross rail (35) of the guide rail support frame (3), and adjust the distance between the nylon single-sided track wheel (7) and the installation position of the nylon single-sided track wheel (7) through the waist-shaped hole on the cross plate of the second T-shaped plate (8), so that the nylon single-sided track wheel (7) slides smoothly on the cross rail (35) and fits the inner wall of the cross rail (35); Step 4: Place the cylinder to be tested flat on the U-shaped bracket (42) of the engine assembly frame (4), ensure that the cylinder to be tested is located in the U-shaped opening of the U-shaped bracket (42), and ensure that the lengths of the two ends of the cylinder to be tested extending out of the U-shaped bracket (42) are consistent; Step 5: confirm whether the axis of the cylinder to be tested on the engine assembly frame (4) and the flaw detection equipment are horizontally consistent. If not, change the fitting length of the vertical plates of the first T-shaped plate (5) and the second T-shaped plate (8), thereby adjusting the height of the engine assembly frame (4); Step 6: Push the cylinder to be tested horizontally towards the flaw detection equipment, ensuring that they do not touch each other, until the flaw detection equipment enters the cylinder to be tested; Step 7: If the detection distance is sufficient, the nylon single-sided track wheel (7) is fixed to prevent sliding. If the detection distance is insufficient, the relative distance between the flaw detection device and the cylinder to be tested is adjusted by the telescopic mechanism. After the distance is adjusted, the nylon single-sided track wheel (7) is fixed; Step 8: Start the flaw detection equipment to perform X-ray flaw detection.

5. A cylinder girth weld flaw detection method according to claim 4, characterized in that: Also includes: Step 9: After the flaw detection is completed, the staff will check the flaw detection results. If the flaw detection results are qualified, the data will be output and printed. If the flaw detection results are unqualified, it will be checked whether it is due to the assembly of the cylinder to be tested and the auxiliary flaw detection device or the flaw detection equipment. After eliminating the fault, the flaw detection will be reviewed again; Step 10: After the flaw detection is completed, turn off the flaw detection equipment; Step 11: Release the fixation of the nylon single-sided track wheel (7), slowly move the cylinder to be tested away from the flaw detection equipment until the two are completely separated, and remove the cylinder to be tested.

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