JP2018155550A - X-ray inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray inspection device with which it is possible to solve the problem that when an electronic board is plated in the lower part of a cooling unit, dew condensation developed in the cooling unit drops onto the electronic board causing a fault to occur, and the electronic board hitherto had to be placed at an upper part inside a housing that tends to become hot because of a relationship with other internal apparatuses, thus making it possible to effectively cool not just an X-ray source but the electronic board also.SOLUTION: The X-ray inspection device comprises an X-ray source, an electronic board, a housing that contains these, and a cooling unit that cools the inside of the housing. The electronic board is placed in the lower part of the cooling unit, and a shield plate for preventing droplets condensed in the cooling unit from falling onto the electronic board is provided between the cooling unit and the electronic board. Thus, it is possible to prevent the electronic board from being splashed with water and going wrong.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an X-ray inspection apparatus including a cooling device that cools an X-ray source that generates heat.

  An X-ray inspection apparatus is introduced in a production line for processed foods or the like in order to inspect foreign matters mixed in food. Since such an industrial X-ray inspection apparatus is normally operated continuously, a heat generating X-ray source is always equipped with a cooling device.

  The X-ray inspection apparatus described in the following patent document discloses an example of such a cooling apparatus.

JP 2007-292497 A

  The cooling device described in the above-mentioned patent document has an advantage that an electronic substrate that is weak at high temperature is also cooled in order to cool the entire inside of the housing in which the X-ray source and the electronic substrate are housed. However, when the electronic board is disposed below the cooling unit of the cooling device, condensation generated in the cooling unit may drop on the electronic board and cause a failure. For this reason, until now, due to the relationship with other internal devices, it has been necessary to arrange an electronic substrate in the upper part of the casing that becomes high temperature or to attach a cooling unit that causes condensation to the outside of the casing.

  An object of the present invention is to provide a new X-ray inspection apparatus capable of effectively cooling not only an X-ray source but also an electronic substrate.

  An X-ray inspection apparatus according to the present invention includes an X-ray source, an electronic board, a housing that stores these, and a cooling unit that cools the inside of the housing, and the electronic board is disposed below the cooling unit. A shielding plate is disposed between the cooling unit and the electronic substrate to prevent water droplets condensed at the cooling unit from falling on the electronic substrate.

  The cooling unit is a portion corresponding to the indoor unit of the air conditioner, and water droplets condensed in the cooling unit are discharged from the heat radiating unit corresponding to the outdoor unit to the outside of the apparatus. However, even if the drainage channel is clogged and drops of water fall from the cooling part, in the present invention, the water drops are dropped on the electronic board by the shielding plate provided between the cooling part and the electronic board. Is preventing.

  The cooling unit is attached to a wall surface of a housing, and the shielding plate covers the bottom surface of the cooling unit and is formed to be inclined downward toward the wall surface. Thereby, since the water collected on the shielding plate flows along the wall surface, even if the water accumulates in the shielding plate, it is possible to prevent an accident that the water falls on the lower electronic substrate.

  Further, the inside of the housing is shaped such that the cool air discharged from the cooling unit sinks to the lower part where the electronic substrate is installed. As a result, the electronic board is always exposed to cold air, so that the computer mounted on the electronic board can be operated normally.

  Further, an X-ray source is arranged in front of the cold air outlet of the cooling unit. Thereby, the X-ray source which is a heat generating body is directly cooled by the cold air from the cooling unit.

  According to the present invention, the electronic substrate is disposed below the cooling unit that cools the inside of the housing, cools the electronic substrate together with the X-ray source, and drops of water falling from the cooling unit between the cooling unit and the electronic substrate. Since the shielding board which shields is arrange | positioned, the electronic substrate arrange | positioned at the lower part can be protected from the water drop which falls there. In addition, since the electronic substrate is disposed below the cooling unit and is constantly exposed to cold air, it is possible to suppress the temperature increase of the electronic substrate and to ensure normal operation of the electronic component.

1 is a rear external perspective view of an X-ray inspection apparatus according to an embodiment of the present invention. The partial cross section side view of the said embodiment. The back external appearance perspective view of the state which opened the back door of the above-mentioned embodiment.

  Hereinafter, an X-ray inspection apparatus according to an embodiment of the present invention will be described with reference to the drawings. In addition, this embodiment is an example and does not limit the technical scope of the present invention.

  1 to 3, an X-ray inspection apparatus 100 according to an embodiment of the present invention includes an X-ray inspection room A, a belt conveyor B that carries articles into and out of the inspection room A, and the belt conveyor B. X-ray source 1 for irradiating the article conveyed by X-rays, a line sensor having a well-known configuration (not shown) for detecting X-rays transmitted through the article and the conveyor belt b, and an output from the line sensor for two-dimensional X A computer (not shown) that inspects the quality inside the article, for example, the presence or absence of foreign matter, the presence or absence of cracks in the contents, the presence or absence of attached accessories, by developing into a line transmission image and implementing the computer An electronic substrate 2, a housing 3 that houses the X-ray source 1 and the electronic substrate 2, a cooling unit 4 that cools the inside of the housing 3, and support legs 5 that support the entire housing. It is a thing.

  As shown in FIG. 2, the X-ray source 1 is disposed at the upper part in the housing 3, and the electronic board 2 is disposed at the lower part in the housing 3. 4 is attached.

  The X-ray source 1 has a well-known configuration including a box in which an X-ray tube (not shown) is immersed in insulating cooling oil, and cooling fins extending in the vertical direction are arranged on the outer periphery of the box. X-rays irradiated from the X-ray source 1 toward the lower belt conveyor B are irradiated radially into the X-ray examination room A through the collimator 10.

The X-ray examination room A is formed by a tunnel-like space surrounded by a stainless steel housing 3 that shields X-rays and a stainless steel door 6 that is disposed on the front side. Is equipped with a warmer 7 (see FIGS. 1 and 3) for preventing X-ray leakage. A belt conveyor B is disposed on the bottom surface side of the X-ray examination room A, and a top plate on which the belt b travels is formed of an X-ray shielding member. The open / close door 6 can be opened and closed to the front with the hinge 8 at the lower end as the center of rotation.
In FIG. 2, the left side is the front side of the X-ray inspection apparatus 100.

  The housing 3 is made of stainless steel that shields X-rays, and a monitor 30 for displaying the operation of the apparatus and the inspection results is attached to the upper front surface on the inside. A cooling unit 4 for cooling the inside of the housing 3 is attached to the back side. The monitor 30 is composed of a touch panel and is electrically connected to the electronic substrate 2.

  The cooling unit 4 is a portion corresponding to the indoor unit of the air conditioner, and the heat radiating unit 40 corresponding to the outdoor unit is arranged outside the housing 3 with a heat exchanger (not shown) sandwiched between the cooling unit 4 and the cooling unit 4. Has been. Therefore, the cooling device provided with the cooling unit 4 and the heat radiating unit 40 is attached in a state of being fitted into the opening of the housing wall surface. A cool air discharge port 41 for discharging cool air is provided at the lower part of the cooling unit 4, and a warm air suction port 42 for sucking warm air is provided at the upper part.

  A collimator 10 is provided in front of the cold air discharge port 41, and a through-hole leading to a cooling fin extending in the vertical direction is formed on the bottom surface of the X-ray source 1 excluding the collimator 10. Therefore, the cool air discharged toward the collimator 10 cools the X-ray source 1 while rising from the bottom surface side of the X-ray source 1 through the cooling fins. Therefore, a fan 11 that forcibly raises the cold air is attached to the top of the X-ray source 1.

  In addition, an inclined plate 43 facing the collimator 10 without attaching cold air to the X-ray examination room A is attached to the front of the cold air outlet 41 as necessary. This is to prevent an accident in which when the ceiling portion of the X-ray inspection room A is excessively cooled, dew condensation occurs on the ceiling portion and water drops fall on the inspection object. Since the X-ray source 1 is supported by parallel support plates extending in the front-rear direction, the bottom surface of the X-ray source 1 excluding the collimator 10 is widely exposed. Therefore, a cold air circulation path is formed as shown by the arrow in FIG.

  On the other hand, the lower part in the housing 3 in which the electronic substrate 2 is arranged is formed in a pocket in which cool air is accumulated. As a result, the electronic substrate 2 is kept at a stable low temperature without being directly affected by the X-ray source 1 as a heating element.

  On the bottom surface of the cooling unit 4, a shielding plate 44 that prevents water droplets condensed on the cooling unit 4 from dripping onto the electronic substrate 2 is provided.

  As shown in FIGS. 2 and 3, the shielding plate 44 is formed in a dust removal mold having an open wall surface so as to cover the bottom surface of the cooling unit 4, and is further lowered toward the wall surface of the housing 3. It is formed with an inclination. Therefore, even if the drainage channel in the cooling unit 4 is clogged and water condensed in the shielding plate 44 is collected, the water flows along the wall surface and is not collected in the shielding plate 44. There is no such thing.

  Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and other embodiments can be employed. For example, a roof may be provided on the electronic substrate 2. In this case, for example, an inclined roof provided with a lattice-like member is provided so that water drops falling from above do not jump in all directions. Moreover, although the drainage channel which drains the condensed water from the lower end part of the thermal radiation part 40 is provided in the cooling unit 4, you may connect the lower end part of the shielding board 44 to this drainage channel. In addition, an original drainage channel may be provided in the shielding plate 44 and discharged outside the apparatus.

DESCRIPTION OF SYMBOLS 1 X-ray source 2 Electronic substrate 3 Case 4 Cooling part 41 Cold air discharge port 44 Shielding plate

Claims (4)

  An X-ray inspection apparatus comprising an X-ray source, an electronic substrate, a housing for storing these, and a cooling unit for cooling the inside of the housing, wherein the electronic substrate is disposed below the cooling unit. An X-ray inspection apparatus in which a shielding plate is disposed between the cooling unit and the electronic substrate to prevent water droplets condensed at the cooling unit from falling on the electronic substrate.   2. The X-ray inspection apparatus according to claim 1, wherein the cooling unit is attached to the wall surface of the housing, and the shielding plate covers the bottom surface of the cooling unit and is inclined downward toward the wall surface.   The X-ray inspection apparatus according to claim 1, wherein the inside of the housing has a shape in which cool air discharged from the cooling unit sinks to a lower portion where the electronic substrate is installed.   The X-ray inspection apparatus according to claim 1, wherein the X-ray source is disposed in front of a cold air outlet of the cooling unit.