阅读说明：本技术 一种钢结构焊缝检测装置 (Steel construction welding seam detection device ) 是由 何鹏 徐显政 程围峰 于 2020-11-19 设计创作，主要内容包括：本申请涉及检测设备的技术领域,尤其是涉及一种钢结构焊缝检测装置,其包括两根呈同轴线设置的伸缩杆和位于两根伸缩杆之间的安装机构；安装机构上设有超声波探伤仪,两根伸缩杆相对的一端均连接于安装机构,两根伸缩杆相背离的一端均设有滚动机构；滚动机构绕伸缩杆轴线转动连接于伸缩杆；当滚动机构抵触于地面时,安装机构和超声波探伤仪均与地面呈间隔设置。在检测完成后,工人将通过伸缩杆带动滚动机构向安装机构运动,减小了检测装置的整体占用空间。本申请改善了检测装置不方便收纳以及车载运输的情况。(The application relates to the technical field of detection equipment, in particular to a steel structure weld joint detection device which comprises two coaxially arranged telescopic rods and an installation mechanism positioned between the two telescopic rods; the mounting mechanism is provided with an ultrasonic flaw detector, the opposite ends of the two telescopic rods are connected to the mounting mechanism, and the ends of the two telescopic rods, which are far away from each other, are provided with rolling mechanisms; the rolling mechanism is connected to the telescopic rod in a rotating way around the axis of the telescopic rod; when the rolling mechanism is abutted to the ground, the mounting mechanism and the ultrasonic flaw detector are arranged at intervals with the ground. After the detection is finished, a worker drives the rolling mechanism to move towards the mounting mechanism through the telescopic rod, and the whole occupied space of the detection device is reduced. The application improves the conditions of inconvenient storage and vehicle-mounted transportation of the detection device.)

1. The utility model provides a steel construction welding seam detection device which characterized in that: comprises two telescopic rods (6) which are coaxially arranged and an installation mechanism (2) which is positioned between the two telescopic rods (6); the ultrasonic flaw detector (3) is arranged on the mounting mechanism (2), one ends of the two telescopic rods (6) which are opposite to each other are connected to the mounting mechanism (2), and the ends of the two telescopic rods (6) which are far away from each other are provided with the rolling mechanisms (1); the rolling mechanism (1) rotates around the axis of the telescopic rod (6) and is connected with the telescopic rod (6); when the rolling mechanism (1) is abutted against the ground, the mounting mechanism (2) and the ultrasonic flaw detector (3) are arranged at intervals with the ground.

2. The steel structure weld detecting device according to claim 1, characterized in that: the mounting mechanism (2) comprises an outer ring (21) and an inner ring (22) arranged on the inner side of the outer ring (21), the outer ring (21) is connected to the inner ring (22) through a connecting rod (23), and the two telescopic rods (6) are connected to the inner ring (22); the ultrasonic flaw detector (3) is arranged between the inner wall of the outer ring (21) and the outer wall of the inner ring (22), and a detection port (24) for ultrasonic waves to pass through is arranged on the outer ring (21).

3. The steel structure weld detecting device according to claim 2, characterized in that: the detection device also comprises an opening and closing mechanism (7), wherein the opening and closing mechanism (7) comprises an opening and closing door (71) which is arranged on the outer ring (21) and is used for closing the detection port (24).

4. The steel structure weld detecting device according to claim 3, characterized in that: the opening and closing door (71) is rotatably connected to the inner wall of the outer ring (21); the opening and closing mechanism (7) further comprises a first torsion spring (72) for promoting the opening and closing door (71) to rotate away from the detection port (24), a pressure lever (74) connected to the inner ring (22) in a sliding mode along the radial direction of the inner ring (22), and a limiting assembly (77) for limiting one end of the telescopic rod (6) at the inner side of the inner ring (22); one end of the first torsion spring (72) is fixedly connected to the opening and closing door (71), and the other end of the first torsion spring (72) is fixedly connected to the inner wall of the outer ring (21); one end of the pressure lever (74) is abutted against the opening and closing door (71), and the other end of the pressure lever (74) penetrates through the inner ring (22) and extends into the inner side of the inner ring (22); one end of the telescopic rod (6) limited by the limiting component (77) is embedded in the inner ring (22) in a sliding mode, and one end, extending into the inner ring (22), of the telescopic rod (6) is provided with an inclined surface (76) used for pressing the pressing rod (74) to the opening and closing door (71) so that the opening and closing door (71) is closed to the detection opening (24).

5. The steel structure weld detecting device according to claim 4, characterized in that: the limiting component (77) comprises a limiting groove (771) formed in the inner wall of the inner ring (22) and a limiting block (772) arranged on one end, at the inner side of the inner ring (22), of the telescopic rod (6), and the limiting block (772) is embedded in the limiting groove (771) in a sliding mode.

6. The steel structure weld detecting device according to claim 1, characterized in that: the rolling mechanism (1) comprises a rolling ring (11) which rotates around the axis of the telescopic rod (6) and is connected to one end of the telescopic rod (6) far away from the mounting mechanism (2); when the telescopic rod (6) is contracted, the end parts of the two rolling rings (11) are mutually butted, and the mounting mechanism (2) and the ultrasonic flaw detector (3) are both positioned at the inner sides of the two rolling rings (11).

7. The steel structure weld detecting device according to claim 6, characterized in that: the locking mechanism (5) is used for locking the two rolling rings (11) together, the locking mechanism (5) comprises a clamping groove (51) formed in the inner wall of one rolling ring (11), a rotating plate (52) rotatably connected to the inner wall of the other rolling ring (11), a clamping block (53) arranged on the rotating plate (52) and a second torsion spring (54) for enabling the clamping block (53) to be clamped in the clamping groove (51), one end of the second torsion spring (54) is fixedly connected to the rotating plate (52), and the other end of the second torsion spring (54) is fixedly connected to the inner wall of the rolling ring (11) where the rotating plate (52) is located; the outer wall of the rolling ring (11) where the rotating ring is arranged is also provided with a through groove (55) for a worker to push the rotating plate (52) to rotate.

8. The steel structure weld detecting device according to claim 2, characterized in that: and a push rod mechanism (4) is arranged on the outer wall of the outer ring (21).

9. The steel structure weld detecting device according to claim 8, characterized in that: the push rod mechanism (4) comprises a plurality of sleeves (41) which are sequentially arranged and the inner diameter and the outer diameter of each sleeve are gradually increased, and a plurality of limiting rings (42) which are fixedly sleeved on the corresponding sleeves (41); every two adjacent sleeves (41) are connected through an elastic rope (43), the elastic rope (43) drives the sleeve (41) with the larger inner diameter to be sleeved on the sleeve (41) with the smaller inner diameter, and the elastic rope (43) drives the sleeve (41) with the larger inner diameter to abut against the end face of the limiting ring (42) on the sleeve (41) with the smaller inner diameter; a sleeve (41) having the smallest inner diameter is provided on the outer wall of the outer ring (21).

Technical Field

The application relates to the technical field of detection equipment, in particular to a steel structure weld joint detection device.

Background

The purpose of welding quality detection is to ensure the integrity, reliability, safety and usability of a welded structure. The weld seam detection in the weld quality inspection is usually performed by an ultrasonic flaw detector.

Through retrieval, Chinese patent publication No. CN110286156A discloses an automatic detection system for steel structure welding seam, which comprises a bottom plate, a machine body for placing an ultrasonic flaw detector is arranged on the bottom plate, rotating shafts are rotatably connected with two sides of the bottom plate under the bottom plate, rollers are sleeved and fixedly connected with two ends of the rotating shafts on the two sides, a first driving piece for driving the rotating shafts on the two sides to simultaneously rotate along the same direction is arranged under the bottom plate, a probe for contacting with the surface of the steel structure is arranged on one side edge of the bottom plate, the probe is connected with the machine body through an electric wire, a second driving piece for driving the probe to move along the length direction of one side edge of the bottom plate is arranged on the bottom plate, the roller can drive the whole bottom plate to move on the steel structure through the first driving piece, the probe is driven to detect by the bottom plate, the, the probe is not required to be taken by an operator to move on the surface to be detected, and a large amount of manpower is saved.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the whole occupied space of the detection system is large, and the detection system is inconvenient to store and transport on a vehicle, so that improvement is needed.

Disclosure of Invention

In order to improve the inconvenient condition of accomodating and on-vehicle transportation, this application provides a steel construction welding seam detection device.

The application provides a pair of steel construction welding seam detection device adopts following technical scheme: a steel structure weld joint detection device comprises two telescopic rods which are coaxially arranged and an installation mechanism which is positioned between the two telescopic rods; the mounting mechanism is provided with an ultrasonic flaw detector, the opposite ends of the two telescopic rods are connected to the mounting mechanism, and the ends of the two telescopic rods, which are far away from each other, are provided with rolling mechanisms; the rolling mechanism is connected to the telescopic rod in a rotating way around the axis of the telescopic rod; when the rolling mechanism is abutted to the ground, the mounting mechanism and the ultrasonic flaw detector are arranged at intervals with the ground.

By adopting the technical scheme, in the detection process, a worker drives the rolling mechanisms to be far away from the mounting mechanism through the telescopic rod, and the distance between the two groups of rolling mechanisms is increased, so that the stability of the ultrasonic flaw detector in the detection process is improved; the rolling mechanism can rotate relative to the mounting mechanism, so that the movement detection of the ultrasonic flaw detector is realized. When the rolling mechanism rolls on the ground, the installation mechanism and the ultrasonic flaw detector are arranged at intervals with the ground, so that the installation mechanism and the ultrasonic flaw detector are not easy to wear. After the detection is completed, a worker drives the rolling mechanism to move towards the installation mechanism through the telescopic rod, so that the whole occupied space of the detection device is reduced, and the conditions of inconvenient storage and vehicle-mounted transportation of the detection device are improved.

Optionally, the mounting mechanism includes an outer ring and an inner ring arranged inside the outer ring, the outer ring is connected to the inner ring through a connecting rod, and the two telescopic rods are both connected to the inner ring; the ultrasonic flaw detector is arranged between the inner wall of the outer ring and the outer wall of the inner ring, and the outer ring is provided with a detection port for ultrasonic waves to pass through.

By adopting the technical scheme, the ultrasonic flaw detector is arranged between the inner wall of the outer ring and the outer wall of the inner ring, so that the ultrasonic flaw detector is not easy to collide with external foreign matters to damage; and the ultrasonic wave that the ultrasonic flaw detector sent can pass the detection mouth thereby detect the welding seam, guaranteed ultrasonic flaw detector's normal use.

Optionally, the detection device further comprises an opening and closing mechanism, and the opening and closing mechanism comprises an opening and closing door which is arranged on the outer ring and used for closing the detection port.

Through adopting above-mentioned technical scheme, the workman can come through the opening and closing door control to detect opening and close according to actual need.

Optionally, the opening and closing door is rotatably connected to the inner wall of the outer ring; the opening and closing mechanism also comprises a first torsion spring for driving the opening and closing door to rotate and keep away from the detection port, a pressure lever connected to the inner ring in a sliding manner along the radial direction of the inner ring, and a limiting component for limiting one end of the telescopic rod at the inner side of the inner ring; one end of the first torsion spring is fixedly connected with the opening and closing door, and the other end of the first torsion spring is fixedly connected with the inner wall of the outer ring; one end of the pressure lever is abutted against the opening and closing door, and the other end of the pressure lever penetrates through the inner ring and extends into the inner side of the inner ring; the telescopic link is set up including the intra-annular by the slip of spacing one end of subassembly, and the telescopic link stretches into one of intra-annular and is served and be used for pressing the depression bar to the door of opening and shutting thereby make the door of opening and shutting seal in the inclined plane of detecting the mouth.

By adopting the technical scheme, in the detection process, a worker drives the rolling mechanism to be far away from the installation mechanism through the telescopic rod, the end part of the telescopic rod is not easy to be separated from the inner side of the inner ring due to the limiting component, the inclined surface is contacted with one end of the pressing rod extending into the inner side of the inner ring, and the other end of the pressing rod is abutted against the opening and closing door; the first torsion spring is in a natural state and enables the opening and closing door to be far away from the detection opening, the detection opening is exposed, and ultrasonic waves emitted by the ultrasonic flaw detector can penetrate through the detection opening and detect a welding seam.

After the detection is completed, a worker drives the rolling mechanism to move towards the installation mechanism through the telescopic rod, the end part of the telescopic rod penetrates into the inner side of the inner ring, the inclined plane is abutted to one end of the pressing rod extending into the inner side of the inner ring, the pressing rod is pressed to the opening and closing door and enables the opening and closing door to rotate and be sealed in the detection port, so that external foreign matters are not prone to contacting the ultrasonic flaw detector through the detection port, and the ultrasonic flaw detector is effectively protected.

Optionally, the limiting assembly comprises a limiting groove formed in the inner wall of the inner ring and a limiting block arranged on one end, extending into the inner side of the inner ring, of the telescopic rod, and the limiting block is embedded in the limiting groove in a sliding mode.

By adopting the technical scheme, when the telescopic rod slides on the inner side of the inner ring, the limiting block slides in the limiting groove; the cooperation of stopper and spacing groove for the telescopic link is difficult for breaking away from the inner ring inboard.

Optionally, the rolling mechanism comprises a rolling ring which is rotatably connected to one end of the telescopic rod, which is far away from the mounting mechanism, around the axis of the telescopic rod; when the telescopic link contracts, the ends of the two rolling rings are mutually butted, and the mounting mechanism and the ultrasonic flaw detector are both positioned on the inner sides of the two rolling rings.

Through adopting above-mentioned technical scheme, after detecting and accomplishing, the workman will drive the roll ring through the telescopic link and move to installation mechanism for the tip of two roll rings is contradicted each other, and installation mechanism and ultrasonic flaw detector all are located the inboard of two roll rings this moment, thereby has further reduced detection device's whole occupation space, and has realized the effective protection to installation mechanism and ultrasonic flaw detector.

Optionally, the locking mechanism is used for locking the two rolling rings together, and comprises a clamping groove formed in the inner wall of one of the rolling rings, a rotating plate rotatably connected to the inner wall of the other rolling ring, a clamping block arranged on the rotating plate, and a second torsion spring for clamping the clamping block in the clamping groove, wherein one end of the second torsion spring is fixedly connected to the rotating plate, and the other end of the second torsion spring is fixedly connected to the inner wall of the rolling ring where the rotating plate is located; the outer wall of the rolling ring where the rotating ring is arranged is also provided with a through groove for a worker to push the rotating plate to rotate.

Through adopting above-mentioned technical scheme, after two rolling rings supported each other, the second torsional spring will make the rotor plate rotatory to the joint groove, and the joint piece on the rotor plate will rotate the joint in the joint inslot for two rolling rings are difficult for separating. When workman's finger passed through the groove and promoted the rotor plate rotation and keep away from in the joint groove, the joint piece on the rotor plate will break away from in the joint groove, and two rolling rings will keep away from each other this moment to detection device's use.

Optionally, a push rod mechanism is arranged on the outer wall of the outer ring.

By adopting the technical scheme, a worker can hold the push rod mechanism, so that the mounting mechanism and the rolling mechanism can be conveniently pushed to move.

Optionally, the push rod mechanism includes a plurality of sleeves arranged in sequence, wherein the inner diameter and the outer diameter of each sleeve are gradually increased, and a plurality of limiting rings fixedly sleeved on the corresponding sleeves; each two adjacent sleeves are connected through an elastic rope, the elastic rope drives the sleeve with the larger inner diameter to be sleeved on the sleeve with the smaller inner diameter, and the elastic rope drives the sleeve with the larger inner diameter to abut against the end face of the limiting ring on the sleeve with the smaller inner diameter; the sleeve with the smallest inner diameter is arranged on the outer wall of the outer ring.

Through adopting above-mentioned technical scheme, when the elasticity rope was in natural state, the elasticity rope will drive the great sleeve cover of internal diameter in per two adjacent sleeves and establish on the less sleeve of internal diameter, and make the great sleeve of internal diameter contradict the spacing ring terminal surface on the less sleeve of internal diameter, push rod mechanism will constitute a stock this moment to the workman of being convenient for promotes installation mechanism and rolling mechanism motion through push rod mechanism.

Because the sleeve with the smallest inner diameter is arranged on the outer wall of the outer ring, when a worker pushes the mounting mechanism to move through the push rod mechanism, the sleeve with the larger inner diameter in every two adjacent sleeves is tightly pressed on the end face of the limiting ring on the sleeve with the smaller inner diameter, and therefore the stability of the push rod mechanism is guaranteed.

After the detection is finished, a worker can cause the sleeve with the larger inner diameter to be separated from the sleeve with the smaller inner diameter in every two adjacent sleeves, so that the push rod mechanism can be wound into a ring shape and wound on the outer ring, and the whole occupied space of the detection device is further reduced.

To sum up, the application comprises the following beneficial technical effects:

1. due to the arrangement of the telescopic rod, the mounting mechanism and the rolling mechanism, the overall occupied space of the detection device is reduced, and the situations that the detection device is inconvenient to store and transport on a vehicle are improved;

2. the opening and closing mechanism can control the opening and closing of the detection port, so that external foreign matters are not easy to contact the ultrasonic flaw detector through the detection port, and the ultrasonic flaw detector is effectively protected;

3. the arrangement of the rolling rings ensures that the mounting mechanism and the ultrasonic flaw detector are both positioned at the inner sides of the two rolling rings, thereby further reducing the overall occupied space of the detection device and realizing the effective protection of the mounting mechanism and the ultrasonic flaw detector;

4. the arrangement of the push rod mechanism is convenient for pushing the mounting mechanism and the rolling mechanism to move, and the push rod mechanism can be wound into a ring shape and wound on the outer ring, so that the whole occupied space of the detection device is further reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure in the embodiment of the present application;

FIG. 2 is a schematic structural view showing a mounting mechanism and an opening/closing mechanism in the embodiment of the present application;

FIG. 3 is a schematic structural view showing a mounting mechanism and one of the rolling mechanisms in an embodiment of the present application;

FIG. 4 is a schematic sectional view of the embodiment of the present application showing two sets of rolling mechanisms engaged with each other;

FIG. 5 is an enlarged partial schematic view at A of FIG. 4;

FIG. 6 is a schematic structural view showing a mounting mechanism, a rolling mechanism and a pusher mechanism in the embodiment of the present application;

fig. 7 is a schematic sectional view showing the mounting mechanism and the opening/closing mechanism in the embodiment of the present application.

Reference numerals: 1. a rolling mechanism; 11. a rolling ring; 12. a bearing; 13. a support bar; 2. an installation mechanism; 21. an outer ring; 22. an inner ring; 23. a connecting rod; 24. a detection port; 3. an ultrasonic flaw detector; 4. a push rod mechanism; 41. a sleeve; 42. a limiting ring; 43. an elastic cord; 44. a storage cylinder; 5. a locking mechanism; 51. a clamping groove; 52. a rotating plate; 53. a clamping block; 54. a second torsion spring; 55. a through groove; 6. a telescopic rod; 61. an outer cylinder; 62. an inner rod; 63. a bolt; 7. an opening and closing mechanism; 71. opening and closing the door; 72. a first torsion spring; 73. a through hole; 74. a pressure lever; 75. a mating surface; 76. an inclined surface; 77. a limiting component; 771. a limiting groove; 772. and a limiting block.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses steel construction welding seam detection device. As shown in fig. 1 and 2, the steel structure weld joint detection device comprises two groups of rolling mechanisms 1, wherein an installation mechanism 2 is arranged between the two groups of rolling mechanisms 1, and an ultrasonic flaw detector 3 and a push rod mechanism 4 are arranged on the installation mechanism 2; the two groups of rolling mechanisms 1 are rotatably connected with telescopic rods 6, and the two telescopic rods 6 are connected to the mounting mechanism 2; the two groups of rolling mechanisms 1 are provided with the same locking mechanism 5. A worker can push the mounting mechanism 2 and the rolling mechanism 1 to move through the push rod mechanism 4; the telescopic rod 6 can promote the rolling mechanisms 1 to move towards the mounting mechanism 2, and the locking mechanism 5 can lock and fix the two groups of rolling mechanisms 1 which are close to each other, so that the overall occupied space of the detection device is reduced.

As shown in FIG. 2, the mounting mechanism 2 comprises an outer ring 21 and an inner ring 22 arranged on the inner side of the outer ring 21, a plurality of connecting rods 23 extending along the radial direction of the outer ring 21 are fixed on the inner wall of the outer ring 21, and all the connecting rods 23 are fixedly connected to the outer wall of the inner ring 22, so that the overall strength of the mounting mechanism 2 is increased. The ultrasonic flaw detector 3 is fixed on the inner wall of the outer ring 21 through a fixing plate, and the ultrasonic flaw detector 3 is arranged between the inner wall of the outer ring 21 and the outer wall of the inner ring 22, so that the ultrasonic flaw detector 3 is not easy to collide with external foreign matters to damage.

As shown in fig. 2, a detection port 24 penetrating through the inner wall of the outer ring 21 is formed in the outer wall of the outer ring 21, the detection port 24 corresponds to a probe of the ultrasonic flaw detector 3, and ultrasonic waves emitted by the ultrasonic flaw detector 3 can pass through the detection port 24 to detect a weld joint, so that normal use of the ultrasonic flaw detector 3 is ensured.

As shown in fig. 2 and 3, the two telescopic rods 6 are coaxially arranged, and the two telescopic rods 6 are symmetrically arranged. The telescopic rod 6 comprises an outer cylinder 61 and an inner rod 62, one end of the inner rod 62 is positioned inside the inner ring 22, and the other end of the inner rod 62 is embedded in the outer cylinder 61 in a sliding mode. The rolling mechanism 1 comprises a rolling ring 11 and a bearing 12, wherein an inner ring of the bearing 12 is fixedly sleeved on the outer cylinder 61, and an outer ring of the bearing 12 is fixedly embedded in the rolling ring 11. The rolling ring 11 can rotate relative to the telescopic rod 6, so that the movement detection of the detection device is facilitated. The inner rod 62 can slide in the outer cylinder 61, and the distance between the two sets of rolling mechanisms 1 is adjusted, so that the detection device is convenient to use and store.

As shown in fig. 3, a threaded hole is formed in the outer wall of the outer cylinder 61, the threaded hole penetrates through the inner wall of the outer cylinder 61, a bolt 63 is screwed in the threaded hole, and the bolt 63 abuts against the side wall of the inner rod 62, so that the length of the telescopic rod 6 is not easy to change, and the stability of the rolling ring 11 during rolling is ensured.

As shown in fig. 3, a plurality of support rods 13 extending along the radial direction of the rolling ring 11 are fixed on the inner wall of the rolling ring 11, and all the support rods 13 are fixed on the outer wall of the outer cylinder 61, thereby improving the overall strength of the rolling mechanism 1.

As shown in fig. 4, it is worth mentioning that the inner diameter of the rolling ring 11 is larger than the outer diameter of the outer ring 21. After the detection is finished, the telescopic rod 6 is contracted, the end parts of the two rolling rings 11 are butted with each other, and the outer ring 21 and the ultrasonic flaw detector 3 are both positioned on the inner sides of the two rolling rings 11, so that the whole occupied space of the detection device is further reduced.

As shown in fig. 4 and 5, the locking mechanism 5 includes a locking groove 51 formed on an inner wall of one of the rolling rings 11, a rotating plate 52 is rotatably connected to an inner wall of the other rolling ring 11, a locking block 53 is fixed on the rotating plate 52, and the rotating plate 52 and the locking block 53 form an L-shaped plate; the rotating plate 52 is provided with a second torsion spring 54, one end of the second torsion spring 54 is fixedly connected to the rotating plate 52, and the other end of the second torsion spring 54 is fixedly connected to the inner wall of the rolling ring 11 where the rotating plate 52 is located. After the tip of two rolling rings 11 supported each other, second torsional spring 54 will make the rotating plate 52 rotatory to joint groove 51, and joint piece 53 on the rotating plate 52 will rotate the joint in joint groove 51 for two rolling rings 11 are fixed together by the locking, have made things convenient for detection device's transportation and have accomodate.

As shown in fig. 5, the outer wall of the rolling ring 11 where the rotating ring is located is further provided with a through groove 55, and the through groove 55 corresponds to the rotating plate 52. The fingers of the worker can penetrate through the through grooves 55 and push the rotating plate 52 to rotate away from the clamping grooves 51, and the clamping blocks 53 on the rotating plate 52 are separated from the clamping grooves 51 at the moment; the worker can then separate the two rolling rings 11 for the ultrasonic flaw detector 3 to detect the weld.

As shown in fig. 6, the push rod mechanism 4 includes a plurality of sleeves 41 which are sequentially arranged and have gradually increased inner diameters and outer diameters, the sleeve 41 with the smallest inner diameter is fixed on the outer wall of the outer ring 21, and a limit ring 42 is fixedly sleeved on each sleeve 41; an elastic rope 43 is arranged between every two adjacent sleeves 41, one end of each elastic rope 43 is fixedly connected to the outer wall of the sleeve 41 with the smaller inner diameter, and the other end of each elastic rope 43 is fixedly connected to the inner wall of the sleeve 41 with the larger inner diameter.

As shown in fig. 6, in the detection process, the elastic cord 43 drives the sleeve 41 with a larger inner diameter to be sleeved on the sleeve 41 with a smaller inner diameter due to its own elasticity, and the sleeve 41 with a larger inner diameter abuts against the end face of the limit ring 42 on the sleeve 41 with a smaller inner diameter, at this time, the push rod mechanism 4 will form a long rod, so that the worker can push the mounting mechanism 2 and the rolling mechanism 1 to move through the push rod mechanism 4.

As shown in fig. 6, it should be noted that when a worker pushes the mounting mechanism 2 to move through the push rod mechanism 4, the sleeve 41 with the larger inner diameter of each two adjacent sleeves 41 will press against the end surface of the stop ring 42 on the sleeve 41 with the smaller inner diameter, so that the overall length of the push rod mechanism 4 will not be changed easily, and the stability of the push rod mechanism 4 is ensured.

As shown in fig. 6, when the detection is completed, the worker causes the sleeve 41 with the larger inner diameter to be separated from the sleeve 41 with the smaller inner diameter in every two adjacent sleeves 41, and at this time, each two adjacent sleeves 41 can rotate relatively, and the worker causes the push rod mechanism 4 to be annularly wound on the outer wall of the outer ring 21, thereby achieving the storage of the push rod mechanism 4. When the ends of the two rolling rings 11 abut against each other, the push rod mechanism 4 will be located inside the two rolling rings 11, thereby further reducing the overall occupied space of the detection device.

As shown in fig. 6, it is worth explaining that a cartridge 44 extending in the radial direction of the outer ring 21 is fixed to the outer wall of the outer ring 21. When the push rod mechanism 4 is annularly wound on the outer ring 21, the sleeve 41 with the largest inner diameter is inserted into the receiving cylinder 44 and is not easy to be separated from the receiving cylinder 44, so that the overall stability of the push rod mechanism 4 is ensured.

As shown in fig. 7, an opening and closing mechanism 7 for controlling opening and closing of the detection port 24 is provided inside the outer ring 21. The opening and closing mechanism 7 comprises an opening and closing door 71 which is rotatably connected to the inner wall of the outer ring 21, a first torsion spring 72 is arranged on the opening and closing door 71, one end of the first torsion spring 72 is fixedly connected to the opening and closing door 71, and the other end of the first torsion spring 72 is fixedly connected to the inner wall of the outer ring 21. When the first torsion spring 72 is in a natural state, the opening and closing door 71 is far away from the detection port 24, the detection port 24 is exposed, and the ultrasonic waves emitted by the ultrasonic flaw detector 3 can penetrate through the detection port 24 and detect the weld seam.

As shown in fig. 7, a through hole 73 extending along the inner diameter radial direction is formed on the outer wall of the inner ring 22, a press rod 74 is embedded in the through hole 73, and two matching surfaces 75 arranged in an inclined manner are arranged on one end of the press rod 74 facing the inner ring 22. When the detection port 24 is exposed, the opening and closing door 71 abuts against one end of the pressure lever 74 away from the inner ring 22, and urges the other end of the pressure lever 74 to extend into the inner ring 22.

As shown in fig. 7, the ends of the two inner rods 62 close to each other are slidably fitted inside the inner ring 22, and the ends of the two inner rods 62 close to each other are provided with inclined surfaces 76. After the detection is finished, the worker retracts the telescopic rod 6, and the end part of the inner rod 62 is inserted into the inner ring 22; the inclined surfaces 76 of the two inner rods 62 are respectively pressed against the corresponding matching surfaces 75, and the pressure rods 74 are pressed towards the opening and closing door 71 and drive the opening and closing door 71 to rotate and close the detection opening 24, so that external foreign matters are not easy to contact the ultrasonic flaw detector 3 through the detection opening 24, and the ultrasonic flaw detector 3 is effectively protected.

As shown in fig. 7, it should be noted that the cross section of the through hole 73 is square, and the cross section of the pressing rod 74 is also square, so that the pressing rod 74 is not easy to rotate in the through hole 73, thereby facilitating the inclined surface 76 to press the mating surface 75.

As shown in fig. 7, the two inner rods 62 are provided with a limiting component 77 at one end close to each other, and the limiting component 77 includes a limiting groove 771 formed on the inner wall of the inner ring 22 and a limiting block 772 fixed at one end of the inner rod 62 extending into the inner ring 22. When the inner rod 62 slides inside the inner ring 22, the stopper 772 slides inside the stopper groove 771, so that the inner rod 62 is not easily separated from the inside of the inner ring 22.

As shown in fig. 7, it should be noted that when the inner rod 62 slides deep into the inner ring 22, the limiting block 772 slides and presses against one side groove wall of the limiting groove 771, the inclined surface 76 presses the pressing rod 74 to the opening and closing door 71 through the matching surface 75, so that the opening and closing door 71 is closed at the detection port 24. When the inner rod 62 slides in the opposite direction and the limiting block 772 slides and presses against the other side wall of the limiting groove 771, the first torsion spring 72 returns to the natural state and urges the opening and closing door 71 to rotate away from the detection opening 24, the detection opening 24 is exposed, and the opening and closing door 71 urges one end of the pressing rod 74 to penetrate into the inner side of the inner ring 22, so that the matching surface 75 abuts against the inclined surface 76. Under the action of the elastic force of the first torsion spring 72, the press rod 74 is not easy to slide in the through hole 73, and the inner rod 62 is not easy to continue to slide in the inner ring 22, so that the stability of the telescopic rod 6 is ensured.

The implementation principle of the steel structure welding seam detection device in the embodiment of the application is as follows: in the detection process, the fingers of the worker penetrate through the through grooves 55 and push the rotating plate 52 to rotate away from the clamping grooves 51, the clamping blocks 53 on the rotating plate 52 are separated from the clamping grooves 51, and the worker can separate the two rolling rings 11. After the worker makes two rolling rings 11 keep away from each other through the extension of telescopic link 6, two interior poles 62 will also keep away from each other, and first torsional spring 72 will reply to natural state and impel opening and closing door 71 to rotate and keep away from in detection mouth 24, and detection mouth 24 will expose, and the ultrasonic wave that ultrasonic flaw detector 3 sent this moment will be able to pass detection mouth 24 and detect the welding seam. Then, the worker takes out the sleeve 41 having the largest inner diameter from the storage tube 44 and makes the push rod mechanism 4 constitute a long rod, and at this time, the worker can drive the two rolling rings 11 to roll on the ground through the push rod mechanism 4, so as to facilitate the movement detection of the ultrasonic flaw detector 3.

After the detection is completed, the worker causes the sleeve 41 with the larger inner diameter to be separated from the sleeve 41 with the smaller inner diameter in every two adjacent sleeves 41, at this time, every two adjacent sleeves 41 can rotate relatively, the worker causes the push rod mechanism 4 to be annularly wound on the outer wall of the outer ring 21, and the sleeve 41 with the largest inner diameter is inserted into the storage barrel 44, so that the storage of the push rod mechanism 4 is realized.

Then the workman will stretch out and draw back 6 telescopic links, and the tip of two rolling rings 11 will be contradicted each other, and installation mechanism 2, push rod mechanism 4 and ultrasonic flaw detector 3 all are located two rolling ring 11's inboard to reduced detection device's whole occupation space, improved the inconvenient condition of accomodating and on-vehicle transportation of detection device. In the process of shrinking the two telescopic rods 6, the inner rod 62 slides to deeply penetrate into the inner side of the inner ring 22, the inclined surface 76 presses the pressure rod 74 to the opening and closing door 71 through the matching surface 75, the opening and closing door 71 rotates to be closed at the detection port 24, and the ultrasonic flaw detector 3 is effectively protected.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.