Gamma ray flaw detector driving device giving locking authorization

Abstract

The utility model provides a gamma ray flaw detector driving device giving locking authorization. The gamma ray flaw detector driving device comprises a device shell, a driving part and a locking part. The driving part comprises a driving wheel and a rocking handle of the driving wheel, wherein the driving wheel is rotationally mounted in the device shell; the locking part comprises a positioning disc and a positioning lock matched with the positioning disc; and the positioning lock is arranged on the rocking handle and is matched with the positioning lock hole lock of the positioning disc. According to the technical scheme, the technical problem that in the non-destructive inspection shooting detection process, focus offset touch possibly occurs, and consequently a waste piece is caused is solved, and absolute safety of the non-destructive inspection process is guaranteed.

Description

Technical Field

[0001] The present patent application relates to a flaw detection device for performing nondestructive flaw detection on welded joints or components using radiation from radioactive materials, and in particular to a radiation source conveying and driving device for the flaw detection device. Background Art

[0002] Gamma-ray flaw detectors must be equipped with gamma-ray flaw detector drive devices for flaw detection operations, which are used to transport the radioactive source stored inside the gamma-ray flaw detector to the exposure position for detection and filming, and then retract it to the shielded position inside the gamma-ray flaw detector. The conventional structure of the gamma-ray flaw detector drive device includes several major parts, such as the drive part, cable tube and wire part. The wire part consists of an inner core and a spiral outer wire. The ball head at the front end of the wire is used to connect the radioactive source; the spiral outer wire of the wire part is meshed with the drive wheel gear of the drive part for transmission. The drive wheel is manually operated by the wire part, and the cable tube at the upper and lower connecting ports of the drive housing and the source channel in the gamma-ray flaw detector body are transported forward to the filming position, or the radioactive source is dragged back to the body for shielding protection. When the radioactive source is manually driven to the filming focus, the flaw detection can be started. However, if an uninformed person accidentally touches the handle during the detection process, the radioactive source will deviate from the exposure focus, resulting in waste films. Especially in large container or tank inspection projects, the initial film layout operation is complicated and time-consuming. Once waste films appear, not only will a large amount of film be wasted, but a large amount of manpower and material resources invested in the early stage will also be wasted, which has a significant impact on the inspection period.

[0003] To prevent the above situation from happening, the inspection engineering party usually assigns a special person to guard the drive device to prevent it from being touched. However, for the inspection site with exposure time of more than ten hours and most of the filming at night, the difficulty and intensity of guarding can be imagined, and it is still easy to waste film due to inadequate guarding. Summary of the invention

[0004] The invention purpose of this patent application is to overcome the technical problem that after the radiation source driving device of a gamma-ray flaw detector transports the radiation source to the focal position of the film, the radiation source may move and the focal point may shift due to accidental touch, resulting in waste of film, and to provide a gamma-ray flaw detector driving device with locking authorization.

[0005] The technical solution of the gamma-ray flaw detector driving device with locking authorization disclosed in this patent application has the following main technical contents:

[0006] A gamma-ray flaw detector driving device with locking authorization comprises a device housing and a driving part.

[0007] The driving part includes a driving wheel rotatably mounted in the housing of the device and a crank for the driving wheel;

[0008] The described driving wheel forms a wire channel for the meshing wire part and the driving wire part to wind around between the driving wheel and the device housing;

[0009] The driving device further includes a locking part;

[0010] The described locking part includes a positioning disk and a positioning lock that cooperates with the positioning disk;

[0011] The described positioning disk is concentric with the driving wheel and is fixedly installed on one side of the device housing relative to the rocker handle. On the positioning disk, a number of positioning lock holes are evenly arranged on the same circumference;

[0012] The described positioning lock is lock - fitted with the positioning lock holes of the positioning disk and is installed on the rocker handle.

[0013] One preferred option of the above overall technical solution is that the positioning lock is a lock pin that is slidably assembled on the rocker handle and cooperates with the positioning lock holes of the positioning disk.

[0014] One preferred option of the above overall technical solution is that the positioning lock is a key lock installed on the rocker handle. The lock hole of the key lock is on the outer side of the rocker handle, and its lock tongue faces the positioning disk.

[0015] In the technical solution of the gamma - ray flaw detector driving device with locking authorization disclosed in this patent application, after the radiation source moves from the driving part and the wire part to the filming focus, insert the lock pin on the rocker handle into the positioning lock hole at this position on the positioning disk to lock the position of the rocker handle, thereby eliminating the possibility of the rocker handle being accidentally touched. Therefore, this patent application has the following technical advantages:

[0016] ①. Effectively solves the possible touch during the non - destructive testing filming process, avoids the technical problem of film waste caused by focus deviation, and also saves the labor intensity of personnel on duty;

[0017] ②. During the filming process, even if the rocker handle is in the high - rotation position when the radiation source is sent to the filming focus position, due to being locked by the positioning lock, the radiation source will not slide and the focus will not shift due to the self - weight of the wire part;

[0018] ③. Especially when the positioning lock adopts a key lock, the operator has a means of authorization management. Only authorized operators can operate the gamma - ray flaw detector and its driving device, preventing misoperation from the source and ensuring the absolute safety of the non - destructive testing process. Description of the Drawings

[0019] Figure 1 It is the application state diagram of the present utility model.

[0020] Figure 2 It is Figure 1 the rear - view structure diagram of

[0021] Figure 3This is the sectional view structure diagram of the utility model.

[0022] Figure 4 This is the structure diagram of an embodiment of the crank.

[0023] Figure 5 This is the sectional view structure diagram of another embodiment of the utility model. Detailed implementation manners

[0024] The gamma ray flaw detector driving device with locking authorization given by the present invention, as Figure 1 shown, its composition includes a device housing 10 and a driving part.

[0025] The driving part is the driving component of the radiation source conveying steel wire part 22. Its core components are a driving wheel 13 and a crank 4. The driving wheel 13 is rotationally supported in the installation space formed by the device housing 10 and the outer gland 2 through a bearing 14. As Figure 3 shown, the square shaft 11 at the inner end of the crank 4 penetrates into the central square hole of the driving wheel 13, and the crank 4 is fixed to the driving wheel 13 by a bolt 5.

[0026] The driving wheel 13 has a toothed outer edge on its wheel body that meshes with the helical thread of the steel wire part 22, and forms a steel wire channel 15 for the steel wire part to mesh and wind around between it and the device housing 10. As Figure 1 shown, a connecting nozzle 3 for detachably installing a cable tube 21 is provided at the access port of the steel wire channel 15 of the device housing 10.

[0027] The steel wire part 22 is the driving cable of the radiation source, with a helical outer thread that meshes with the teeth of the driving wheel 13. It meshes and winds around the driving wheel 13 through the upper connecting nozzle in the steel wire channel 15 and passes out through the lower connecting nozzle. A ball head 23 is crimped at its front end for connecting the radiation source. By manually shaking the crank 4, the steel wire part 22 and the radiation source at its front end are driven to move, sending the radiation source to the filming focus position or moving it back to the flaw detector shielding position.

[0028] The driving device also includes a locking part for locking the position of the radiation source when it is moved to the filming focus position.

[0029] The locking part includes a positioning disk 7 and a positioning lock that cooperate in a locking manner.

[0030] Among them, the positioning disk 7 is concentric with the driving wheel 13 and is fixedly installed on one side of the device housing 10 opposite to the crank 4. A number of positioning lock holes 8 are evenly arranged on the same circumference of the positioning disk 7.

[0031] The positioning lock, one of its embodiments is as Figure 5As shown, the locking pin 18 is slidably mounted on the crank handle 4 and is on the same circumference as the positioning lock hole 8 on the positioning disk 7. When the driving wheel drives the radiation source to move into the radiography focus position, the position is locked by inserting the locking pin 18 into the positioning lock hole at this position.

[0032] As Figure 3 In another embodiment as shown, the positioning lock is a key lock 6 mounted on the crank handle 4. The lock hole of the key lock 6 is on the outer side surface of the crank handle 4, and its lock tongue 9 faces the positioning disk 7. When the driving wheel 13 drives the radiation source to move into the radiography focus position, the operator who has obtained the operation authorization key manipulates the key lock 6, and locks the lock tongue 9 into the positioning lock hole 8 to achieve the locking of this position. Due to the key authorization function, the operator has the authorization management function, and only the authorized operator can operate, preventing the possibility of misoperation from the source.

Claims

1. A gamma-ray flaw detector driving device with locking authorization, comprising a device housing (10) and a driving unit, The driving part comprises a driving wheel (13) rotatably mounted in the housing of the device and a crank handle (4) of the driving wheel; The driving wheel (13) forms a meshing wire portion (22) and a wire channel (15) for the driving wire portion to pass through with the device housing (10); It is characterized in that The driving device also includes a locking portion; The locking portion comprises a positioning plate (7) and a positioning lock matched with the positioning plate; The positioning plate (7) is concentric with the driving wheel (13) and is fixedly mounted on the side of the device housing opposite to the crank (4). A plurality of positioning lock holes (8) are evenly arranged on the same circumference of the positioning plate (7); The positioning lock is matched with the positioning lock hole (8) of the positioning plate (7) and is installed on the crank handle (4).

2. The gamma-ray flaw detector driving device with locking authorization according to claim 1, characterized in that: The positioning lock is a lock pin (5) which is slidably mounted on the crank handle (4) and matches with the positioning lock hole (8) of the positioning plate.

3. The gamma-ray flaw detector driving device with locking authorization according to claim 1, characterized in that: The positioning lock is a key lock (6) installed on the crank (4), the lock hole of the key lock (6) is located on the outer side of the crank (4), and its lock tongue (9) faces the positioning plate (7).

Images