US-12625093-B2 - Radiographic inspection apparatus and vehicle-mounted security inspection system

US12625093B2US 12625093 B2US12625093 B2US 12625093B2US-12625093-B2

Abstract

A radiographic inspection apparatus and a vehicle-mounted security inspection system. The radiographic inspection apparatus includes a scanning device. The scanning device includes: an upright framework; a slip ring rotatably provided on the upright framework; and at least one locking mechanism. Each locking mechanism includes: a driving mechanism provided on the upright framework; and a locking portion provided on the driving mechanism and configured to press the slip ring in an axial direction of the slip ring under a driving of the driving mechanism, so as to prevent the slip ring from rotating relative to the upright framework.

Inventors

Li Zhang
Zhiqiang Chen
Qingping Huang
Mingzhi Hong
Yi Cheng
Minghua Qiu
Yao Zhang
Jianxue Yang
Lei Zheng

Assignees

NUCTECH COMPANY LIMITED
TSINGHUA UNIVERSITY

Dates

Publication Date: 20260512
Application Date: 20220112
Priority Date: 20210330

Claims (15)

1 . A radiographic inspection apparatus, comprising a scanning device, wherein the scanning device comprises: an upright framework; a slip ring rotatably provided on the upright framework; and at least one locking mechanism, each locking mechanism comprising: a driving mechanism provided on the upright framework; and a locking portion provided on the driving mechanism and configured to move in an axial direction of the slip ring under a driving of the driving mechanism, and apply a pressing force in the axial direction of the slip ring by pulling, so as to prevent the slip ring from rotating relative to the upright framework, wherein each locking portion comprises: a moving rod connected to the driving mechanism, wherein an end of the moving rod away from the driving mechanism is provided with a suspension portion, and the suspension portion protrudes radially and is configured to pull the slip ring in the axial direction, wherein the slip ring is provided with at least one joint portion, and the at least one joint portion extends from an outer ring of the slip ring in a radial direction, and the suspension portion of the moving rod is configured to pull the joint portion in the axial direction, wherein a locking groove is formed on the joint portion and has an opening in a circumferential direction of the slip ring, and a width of the locking groove is greater than an outer diameter of the moving rod, and wherein the suspension portion is formed as a locking flange, and an outer diameter of the locking flange is greater than the width of the locking groove, so that the moving rod is allowed to enter the locking groove from the opening, and the locking flange abuts against an edge of the locking groove.
2 . The radiographic inspection apparatus of claim 1 , wherein the driving mechanism comprises: a base provided on the upright framework; and a driver provided on the base, wherein the moving rod is configured to reciprocate linearly in the axial direction under a driving of the driver.
3 . The radiographic inspection apparatus of claim 2 , wherein the driving mechanism further comprises: an auxiliary base provided on the base and configured to reciprocate linearly in the axial direction, wherein the driver is provided on the auxiliary base; and a supporting frame, wherein the moving rod movably passes through the supporting frame.
4 . The radiographic inspection apparatus of claim 3 , wherein the base is provided with a termination position, and a movement range of the auxiliary base away from the slip ring does not exceed the termination position, wherein the driving mechanism further comprises a resilient mechanism provided between the auxiliary base and the supporting frame, and wherein when the slip ring is in a released state in which the suspension portion releases the slip ring, the resilient mechanism is configured to maintain the auxiliary base at the termination position, and when the slip ring is in a locked state in which the suspension portion locks the slip ring, the auxiliary base overcomes a resilient force of the resilient mechanism to leave the termination position.
5 . The radiographic inspection apparatus of claim 4 , wherein a first proximity switch is provided at the termination position, and a first matching switch is provided on the auxiliary base, so as to detect whether the first matching switch leaves the first proximity switch or not.
6 . The radiographic inspection apparatus of claim 5 , wherein the upright framework is provided with a second matching switch, the slip ring is provided with a second proximity switch, and the driver is configured to drive the moving rod to lock the slip ring in response to the second proximity switch approaching the second matching switch.
7 . The radiographic inspection apparatus of claim 6 , wherein the slip ring is further provided with a third proximity switch, the third proximity switch is disposed at a downstream of the second proximity switch in a forward rotation direction of the slip ring, and a position of the third proximity switch corresponds to a position near an exterior of the opening of each locking groove.
8 . The radiographic inspection apparatus of claim 7 , wherein the slip ring is further provided with a fourth proximity switch, the fourth proximity switch is disposed at a downstream of the third proximity switch in the forward rotation direction of the slip ring, and the locking mechanism is configured to start a locking process for locking the slip ring in response to the fourth proximity switch approaching the second matching switch.
9 . The radiographic inspection apparatus of claim 3 , wherein the auxiliary base is provided on the base through a guide rail mechanism.
10 . A vehicle-mounted security inspection system, comprising: a vehicle; and a radiographic inspection apparatus of claim 1 provided on a chassis of the vehicle.
11 . The vehicle-mounted security inspection system of claim 10 , wherein the chassis comprises: a main body portion; and a horizontal framework integrally connected with the main body portion, wherein the horizontal framework comprises a pair of longitudinal supporting beams and a pair of lateral supporting beams, the upright framework is provided on one of the longitudinal supporting beam or the lateral supporting beam, and at least part of the upright framework is lower than an upper surface of the horizontal framework.
12 . The vehicle-mounted security inspection system of claim 11 , wherein the upright framework is provided on the horizontal framework through two groups of connecting mechanisms, each group of connecting mechanisms comprises a horizontal arm extending outward from an outer side of the upright framework and supported on the longitudinal supporting beam or the lateral supporting beam.
13 . The vehicle-mounted security inspection system of claim 12 , wherein each group of connecting mechanisms further comprises an upright arm provided on the outer side of the upright framework, and the horizontal arm is connected to a lower end of the upright arm.
14 . The vehicle-mounted security inspection system of claim 12 , wherein the two groups of connecting mechanisms are provided on both sides of the upright framework, respectively, and located between a lower end of the upright framework and an upper end of the upright framework, so that at least part of the upright framework is lower than an upper surface of the horizontal framework.
15 . The vehicle-mounted security inspection system of claim 11 , wherein a height of the main body portion from a ground is greater than a height of the horizontal framework from the ground.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application is a National Stage Application of International Application No. PCT/CN2022/071544, filed 12 Jan. 2022, which claims the benefit of Ser. No. 20/211,0336807.2, filed 30 Mar. 2021 in China, and which applications are incorporated herein by reference. To the extent appropriate, a claim of priority is made to each of the above disclosed applications. TECHNICAL FIELD Embodiments of the present disclosure relate to a vehicle-mounted security inspection system, and in particular, to a radiographic inspection apparatus and a movable vehicle-mounted security inspection system including the radiographic inspection apparatus. BACKGROUND Based on requirements of public safety, a vehicle-mounted security inspection system is often used to perform a non-invasion inspection on an object such as a luggage or a package in large public places, such as large-scale exhibitions, temporary highway inspection stations, border inspection ports or stadiums. For example, a radiographic inspection apparatus provided in a vehicle is used to inspect whether a prohibited item such as a drug or an explosive exists in the object or not. An object to be inspected passes through an inspection space of the radiographic inspection apparatus by means of a conveying structure, and an X-ray emission apparatus emits X-rays into a radiographic channel, so as to achieve an inspection of the object. In an existing vehicle-mounted security inspection system, a radiographic inspection apparatus is directly provided in a box of the vehicle. The radiographic examination apparatus generally includes a housing and a scanning device (CT machine) provided in the housing. The scanning device mainly includes a supporting frame, a slip ring rotatably provided on the supporting frame, a radiation source used to emit X-rays provided on the slip ring, a detector array provided on a side of the slip ring opposite to the radiation source, and a conveying structure passing through an approximate center of the slip ring. As the radiographic inspection apparatus is provided in the box of the vehicle, if the radiographic inspection apparatus is not operating while the vehicle is traveling, the slip ring may rotate due to vibration, which may cause a damage to the slip ring. SUMMARY The purpose of the present disclosure is to solve at least one aspect of the above problems and defects in related art. According to an embodiment of an aspect of the present disclosure, a radiographic inspection apparatus is provided, including: a scanning device, where the scanning device includes: an upright framework; a slip ring rotatably provided on the upright framework; and at least one locking mechanism, each locking mechanism including: a driving mechanism provided on the upright framework, and a locking portion provided on the driving mechanism and configured to press the slip ring in an axial direction of the slip ring under a driving of the driving mechanism, so as to prevent the slip ring from rotating relative to the upright framework. According to an embodiment of the present disclosure, each locking portion includes: a moving rod connected to the driving mechanism, where an end of the moving rod away from the driving mechanism is provided with a suspension portion, and the suspension portion protrudes radially and is configured to pull the slip ring in the axial direction. According to an embodiment of the present disclosure, the slip ring is provided with at least one joint portion, and the at least one joint portion extends from an outer ring of the slip ring in a radial direction, and the suspension portion of the moving rod is configured to pull the joint portion in the axial direction. According to an embodiment of the present disclosure, a locking groove is formed on the joint portion and has an opening in a circumferential direction of the slip ring, and a width of the locking groove is greater than an outer diameter of the moving rod. The suspension portion is formed as a locking flange, and an outer diameter of the locking flange is greater than the width of the locking groove, so that the moving rod is allowed to enter the locking groove from the opening, and the locking flange abuts against an edge of the locking groove. According to an embodiment of the present disclosure, the driving mechanism includes: a base provided on the upright framework; and a driver provided on the base, wherein the moving rod is configured to reciprocate linearly in the axial direction under a driving of the driver. According to an embodiment of the present disclosure, the driving mechanism further includes: an auxiliary base provided on the base and configured to reciprocate linearly in the axial direction, where the driver is provided on the auxiliary base; and a supporting frame, where the moving rod movably passes through the supporting frame. According to an embodiment of the present disclosure, the base is provided with a