CN1132772C - Rigid folding structure for container detection scanning arm - Google Patents

Abstract

The present invention relates to a rigid folding structure for a container detecting and scanning arm of customs, which comprises a main arm frame and an auxiliary arm frame. The present invention is characterized in that the front end of the main arm frame is hinged with the auxiliary arm frame to form a cantilever; the auxiliary arm frame and the main arm frame are folded and positioned by rotating an oil cylinder. The back end of the main arm frame is mutually hinged with a front supporting frame, a back supporting frame and a bottom supporting seat to form a four bar linkage mechanism. The unique position of the main arm frame in the detecting state is determined by a positioning oil cylinder and a lifting oil cylinder. The axial position of the four bar linkage mechanism is locked by a locking device. Compared with the prior art, the present invention has the characteristics of reasonable structure and good rigidity. The rigid folding structure can be used for improving the detection performance of a Vehicle-mounted mobile container detecting system.

Description

Rigidized folding structure of scanning arm for container bolt detection

technical field

The invention relates to container detection system equipment applied to customs, in particular to the structural improvement of the scanning arm of the vehicle-mounted mobile container detection system.

Background technique

In the prior art, since the beginning of the 1990s, a drag-type container detection system has come out. They are installed in a detection channel that can shield radiation, and are equipped with a fixed radiation source that can generate high-energy X-rays and an array detector that can receive X-rays passing through the container. When the vehicle is dragged through the detection channel, when the container passes through the X-ray beam, the X-rays passing through the container are transmitted to the detector, and according to the intensity change, the density distribution of the objects contained in the box is reflected, and the ray intensity is converted into an image Gray scale, you can get the perspective image of the objects in the box. The disadvantage of using this fixed detection system is that it occupies a large area, high investment cost, and long construction period. For this reason, at present, some foreign manufacturers have developed a vehicle-mounted mobile container detection system, which typically adopts a carrier vehicle to mount all scanning detection devices and control devices on it. When the carrier vehicle is running, the container is directly detected. However, since the scanning detection device on the vehicle is a simple column-type cantilever folding structure, the rigidity is very poor due to the limitation of the structural form. Therefore, it can only bear lighter weight at its cantilever, that is, the vehicle-mounted equipment is only limited to light load, and the light source of low-energy X-ray radiation and the detector receiving X-ray are installed. The vehicle-mounted mobile container detection system can only detect containers with no load or low cargo density. The use of this vehicle-mounted mobile container detection system has the problems of poor detection performance and inability to meet the practical application of larger customs. Contents of the invention

Aiming at the above-mentioned problems in the prior art, the object of the present invention is to provide a rigid folding structure of a scanning arm for container detection. Using it can improve the detection performance of the vehicle-mounted mobile container detection system and fully meet the practical applications of various customs.

In order to achieve the above-mentioned purpose of the invention, the technical solution of the present invention is realized in the following manner: the rigid folding structure of the container detection scanning arm, which includes a main boom frame, a sub-boom frame, a positioning cylinder, a lifting cylinder, a rotating cylinder, and a support for each cylinder. hydraulic system. Its structural feature is that the front end of the main boom frame is hinged with the auxiliary boom frame to form a cantilever. The folding of the jib frame and the main boom frame is realized by rotating the oil cylinder. The mechanical limit between the sub-jib frame and the main boom frame and the pressure-holding of the oil cylinder determine the unique positional relationship between the sub-jib frame and the main boom frame after deployment. The rear end of the main boom is hingedly supported by the front bracket and the rear bracket, and the original ends of the front bracket and the rear bracket are hinged on the bottom support to form a four-link structure. The horizontal lifting of the main boom is realized through the lifting cylinder. The positioning oil cylinder and the lifting oil cylinder determine the only position when the main boom frame detects the state. The axial position of the four-bar linkage is locked by a locking device.

According to the above-mentioned technical solution, the rotating oil cylinder is hinged outside the two sides of the main boom frame and the auxiliary boom frame; the lifting oil cylinder and the positioning oil cylinder are placed between the front bracket and the rear bracket and are hinged on the bottom bracket and the rear bracket in parallel Between, the bottom support is divided into two parts, which are placed on both sides of the corresponding position of the main support.

According to the above technical solution, the locking device is realized by a locking oil cylinder or a threaded ejector machine.

Since the present invention adopts four-bar linkage support and folding arms to be hinged, each executive oil cylinder acts to make the overall structure complete the required state of the detection system. With the adjustable mechanical limit, the oil cylinder is maintained to eliminate the gap between the diameters of the rotating pair. The axial clearance of the rotating pair is eliminated by the locking device. Therefore, within the normal load range, the overall structure is completely rigid. Compared with the prior art, it greatly improves the bearing capacity at the cantilever. When the present invention is used, a heavy radiation source of high-energy X-rays and a detector for receiving high-energy X-rays can be installed. Therefore, the detection performance index of the vehicle-mounted mobile container detection system is greatly improved, which can fully meet the practical applications of various customs.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a structural installation diagram of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a view along the line A-A of Fig. 1 .

Detailed ways

Referring to Fig. 1 to Fig. 3, the container detection scanning arm has a rigid folding structure, including a main boom 6, a sub-boom 8, a positioning cylinder 2, a lifting cylinder 3, a rotating cylinder 7 and a hydraulic system supporting the work of each cylinder. The front end of the main boom frame 6 is hinged with the secondary boom frame 8 to form a cantilever. The folding of the auxiliary boom frame 8 and the main boom frame 6 is realized by rotating the oil cylinder 7 . The rotary oil cylinder 7 is hinged outside the two sides of the main boom frame 6 and the auxiliary boom frame 8 . The mechanical limit between the main boom frame 6 and the secondary boom frame 8 and the pressure maintaining of the oil cylinder determine the unique position relationship between the secondary boom frame 8 and the main boom frame 6 after deployment. Bottom supports 1 are respectively arranged under both sides of the rear end of the main boom 6, and the front bracket 5 and the rear bracket 4 are hinged between each bottom support 1 and the outer surface of the main boom 6 to form a four-bar linkage structure. The lifting cylinder 3 and the positioning cylinder 2 are placed in the middle of each front support 5 and the rear support 4 and are hinged between the bottom support 1 and the rear support 4 in parallel. The horizontal lifting of the main boom 6 is realized by the lifting cylinder 3 , and the positioning cylinder 2 and the lifting cylinder 3 determine the unique position of the main boom 6 when it is in a detection state. The locking device 9 locks the axial position of the four-bar linkage mechanism by a locking oil cylinder or a threaded ejector mechanism.

When using the present invention, each base support 1 is installed on the rotatable tray on the carrier, and the radiation source that can produce high-energy X-rays, such as a linear electron accelerator, is installed on the tray. Detectors capable of receiving high-energy X-rays are installed in the main arm frame 6 and the auxiliary arm frame 8, and the detectors in the vertical rear auxiliary arm frame 8 and the main arm frame 6 are always facing the X-rays emitted by the radiation source. The installation of its parts is not repeated here. During detection, the gantry formed by the front support 5, the rear support 4, the main arm frame 6 and the auxiliary arm frame 8, straddles the container to be tested, and the movement of the car body itself drives the gantry frame to move in parallel and scan. detection.

Claims (4)

1. A rigid folding structure of a container detection scanning arm applied to customs, which includes a main arm frame (6), a secondary arm frame (8), a positioning cylinder (2), a lifting cylinder (3), a rotating cylinder (7 ) and the hydraulic system supporting the work of each oil cylinder, it is characterized in that: the front end of the main boom (6) is hinged with the auxiliary boom (8) to form a cantilever, and the folding of the auxiliary boom (8) and the main boom (6) passes through The rotation of the cylinder (7) is realized, and the mechanical limit between the jib frame (8) and the main boom frame (6) and the pressure of the oil cylinder determine the only position after the jib frame (8) and the main boom frame (6) are deployed relationship; the rear end of the main boom (6) is hingedly supported by the front bracket (5) and the rear bracket (4), and the bottom ends of the front bracket (5) and the rear bracket (4) are hinged on the bottom support (1) and A four-bar linkage mechanism is formed to realize the horizontal lifting of the main boom (6) through the lifting cylinder (3), and the positioning cylinder (2) and the lifting cylinder (3) determine the unique position of the main boom (6) when it is in the detection state; The axial position of the four-bar linkage mechanism is locked by a locking device (9). 2. The rigidized folding structure of the scanning arm for container detection according to claim 1, characterized in that: the rotary cylinder (7) is hinged outside the two sides of the main boom (6) and the auxiliary boom (8). 3. According to the rigidized folding structure of the container detection scanning arm according to claim 1 or 2, it is characterized in that: the lifting cylinder (3) and the positioning cylinder (2) are placed on the front bracket (5) and the rear bracket (4) The center is hinged between the bottom support (1) and the rear support (4) in parallel, and the bottom support (1) is divided into two parts, which are placed on both sides of the corresponding position of the main arm frame (6). 4. The rigidized folding structure of the container detection scanning arm according to claim 3, characterized in that: the locking device (9) is realized by a locking oil cylinder or a threaded ejector mechanism.

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