CN104091748B - Ionization chamber adjusting means - Google Patents

Abstract

The invention relates to an ionization chamber adjustment device, comprising: a base with a first guide rail; an ionization chamber position adjustment device, including: a first-stage mobile loading platform, which moves in translation on the first guide rail, and has a second Guide rails, the first guide rail is along the X-ray main beam direction, the second guide rail is perpendicular to the direction of the first guide rail; the second-level mobile loading platform moves in translation on the second guide rail; the third-level mobile loading platform includes vertical lifting adjustment Platform, the vertical lifting adjustment platform has a fixture to hold the ionization chamber, which is used to adjust the height of the ionization chamber; adjust the first-level mobile loading platform to move in translation on the first guide rail, and the second-level mobile loading platform to move horizontally on the second guide rail The vertical lifting adjustment platform adjusts the height of the ionization chamber, so that the laser center is aligned with the sensitive volume center of the ionization chamber, and the laser center is at the same position as the X-ray main beam center. The ionization chamber adjustment device of the invention realizes convenient and accurate adjustment of the ionization chamber position.

Description

Ionization chamber adjustment device

technical field

The invention relates to an ionization chamber adjustment device, in particular to an ionization chamber position adjustment device.

Background technique

The X-ray standard radiation device is used in the verification, calibration and detection of X-ray radiation instruments, as well as in the fields of industrial nondestructive testing. enter.

Contents of the invention

The object of the present invention is to provide an ionization chamber adjustment device for the defects of the prior art, so as to realize convenient and accurate adjustment of the ionization chamber position.

To achieve the above object, the present invention provides an ionization chamber adjustment device, the ionization chamber adjustment device includes:

a base with a first guide rail on the base;

Ionization chamber position adjustment device, including:

The first-stage mobile loading platform is slid on the first guide rail, moves in translation on the first guide rail, and has a second guide rail. The first guide rail is along the X-ray main beam direction, and the second guide rail and the The direction of the first guide rail is vertical;

The secondary mobile loading platform is slid on the second guide rail and moves in translation on the second guide rail;

The three-level mobile loading platform is connected to the second-level mobile loading platform, and includes a vertical lifting adjustment platform, and the vertical lifting adjustment platform has a clamp to hold the ionization chamber, which is used to adjust the ionization chamber. high;

Wherein, the first-level mobile loading platform is adjusted to translate on the first guide rail, the second-level mobile loading platform is translated on the second guide rail, and the vertical lifting adjustment platform adjusts the height of the ionization chamber so that the laser center Aligning with the sensitive volume center of the ionization chamber, the laser center is at the same position as the X-ray main beam center.

Further, the secondary mobile loading platform includes: a slider, which slides with the second guide rail; a lead screw, one end of which is connected to the motor, and the other end is connected to the slider, and the lead screw is driven by the motor. The slider slides on the second guide rail.

Further, the vertical lifting adjustment platform has crossed support arms and a first rotating shaft, and the crossing angle of the supporting arms is changed by turning the first rotating shaft to adjust the height.

Further, the clamp includes:

Chassis seat, the chassis seat has threaded holes, and is fixed to the supporting platform by screws;

A support rod is screwed on the chassis seat, and the upper end of the support rod has a socket;

A jig head, said jig head comprising:

a fixing part, the fixing part is plugged into the socket of the support rod by using a connecting rod;

The moving part includes a metal rod, one end of the metal rod is plugged into the fixed part, and the other end is fixed by a connector, and the connector has a screw hole; the clamping part is sleeved on the metal rod The adjusting rod is screwed in the screw hole, and one end is an adjusting head, and the other end is fixed to the clamping part;

Wherein, when the adjustment head is adjusted, the adjustment rod screwed in the screw hole moves in parallel with the metal rod, and the adjustment rod drives the clamping part and the fixing part to clamp the ionization chamber together.

Further, the material of the chassis base, support rods, fixing parts, connecting rods, clamping parts and connecting parts is plexiglass.

Further, the material of the metal rod and the adjusting rod is metal.

Further, the opposite surface of the fixing part and the clamping part is a plane or an arc-shaped surface, and the opposite surface of the clamping part and the fixing part is a plane or an arc-shaped surface.

The ionization chamber adjustment device of the invention realizes convenient and accurate adjustment of the ionization chamber position.

Description of drawings

Fig. 1 is the schematic diagram of ionization chamber adjusting device of the present invention;

Fig. 2 is a schematic diagram of the working state of the ionization chamber regulating device of the present invention

Fig. 3 is the schematic diagram of the clamp of the ionization chamber regulating device of the present invention;

Fig. 4 is a top view of the clamp head of the ion chamber adjusting device of the present invention.

detailed description

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of the ionization chamber adjustment device of the present invention, and Fig. 2 is a schematic diagram of the working state of the ionization chamber adjustment device of the present invention; as shown in the figure, the ionization chamber position adjustment device of the present invention includes: a base 5 and an ionization chamber position adjustment device 6 .

The ionization chamber position adjustment device 6 includes a first-level mobile loading platform 1 , a second-level mobile loading platform 2 and a third-level mobile loading platform 3 .

The base 5 has a first guide rail 10 .

The primary mobile loading platform 1 is slid on the first guide rail 10, moves in translation on the first guide rail 10, and has a second guide rail 11, the first guide rail 10 is along the X-ray main beam direction, the second guide rail 11 and the first The direction of the guide rail 10 is vertical; the secondary mobile loading platform 2 is slid on the second guide rail 11 and moves in translation on the second guiding rail 11; the third-level mobile loading platform 3 is connected with the secondary mobile loading platform 2 , including a vertical lifting adjustment platform 30, the vertical lifting adjustment platform 30 has a clamp 7 to clamp the ionization chamber, and is used to adjust the height of the ionization chamber; the first-level mobile loading platform 1 is adjusted to translate on the first guide rail 10, and the second The stage mobile loading platform 2 translates on the second guide rail 11, and the vertical lifting adjustment platform 30 adjusts the height of the ionization chamber, so that the laser center is aligned with the sensitive volume center of the ionization chamber, and the laser center is at the same position as the X-ray main beam center.

Specifically, the primary mobile object loading platform 1 is adjusted along the X-axis in the direction of the X-ray beam. The secondary mobile loading platform 2 is adjusted along the Y-axis perpendicular to the X-axis direction in the horizontal plane. The vertical adjustment of the three-stage mobile loading platform 3 is Z-axis adjustment.

The first guide rail 10 is fixed on the base 5, and the base 5 is fixed on the ground by expansion bolts, and the level of the base 5 is ensured after installation. The flatness and levelness of the upper surface of the base 5 is less than 1mm, so as to ensure the levelness of the installation of the first guide rail 10 and the grating scale. The first guide rail 10 is two parallel guide rails fixed on the base 5 by screws, and connected with the first-stage mobile loading platform 1 carried above by a slider. The rack is installed on the right side of the base 5 and fixed on the base 5 by screws, and the rack is connected to the motor of the first-level mobile loading platform on the first guide rail 10 through gears to complete the operation of the entire first-level mobile loading platform 1. Move with precision. The grating ruler is installed on the left edge of the base, and the precise positioning in the 1X-axis direction of the primary mobile loading platform is realized through the sensor. The primary loading platform 1 is placed above the first guide rail 10 for the secondary moving loading platform 2 and the tertiary moving loading platform 3, and includes two second guiding rails 11 along the Y-axis direction.

The secondary mobile loading platform 2 includes a slide block, a leading screw and a motor, and the slide block is slidable with the second guide rail; one end of the lead screw is connected with the motor, and the other end is connected with the slide block, and the lead screw is driven by the motor to drive the slide block at the second Two guide rails slide.

Specifically, the secondary mobile loading platform 2 is connected to the second guide rail 11 through a slider. The lead screw is parallel to the two second guide rails 11, placed in the center of the guide rails, one end is connected to the motor, the other end is fixed on the first stage loading platform 1 (the lead screw can realize rotation), and the lead screw passes through and is fixed on the second stage loading platform 2. The lower surface is similar to the structure of the nut device, so that the motor drives the lead screw to rotate to realize the movement of the secondary mobile loading platform 2 in the Y-axis direction.

The three-stage mobile loading platform 3 includes a vertical lifting adjustment platform, such as a scissor-shaped manual lifting platform, which has crossed support arms and a first rotating shaft, and the crossing angle of the supporting arms is changed by rotating the first rotating shaft to adjust the height . It also includes a precision screw drive, a scissor-shaped manual lifting platform with a porous design on the upper and lower sides, equipped with a locking handwheel, and is fixed with the secondary loading platform 2 by screws. There are multiple threaded holes on the upper surface of the vertical lifting adjustment platform, which can realize that the clamp is fixed on the upper surface of the lifting platform by screws.

The ionization chamber is finally clamped by a clamp and fixed on the three-stage mobile loading platform 3 .

Install a fixture suitable for the model of the ionization chamber on the three-pole loading platform 3, take out the ionization chamber to be measured and fix it by the fixture. Connect the ionization chamber measurement system. Adjust the positions of the secondary polar object-carrying platform and the tertiary polar object-carrying platform so that the center of the cross laser (the center of the cross laser is the center of the X-ray main beam) is irradiated at the center of the sensitive volume of the ionization chamber.

Then turn on the X-ray machine, set the parameters of the X-ray machine, and turn the additional filter dial to the standard required for the experiment. The stepper motor software controls the first-level loading platform to move the X-axis to the working position. Then start to measure the ionization current in the ionization chamber. After the measurement is completed under the standard, save the data. Then adjust the X-ray machine parameters, adjust the X-axis position, and measure different specifications.

Due to different types of ionization chambers and different measurement specifications, it is necessary to perform measurements at different positions from the X-ray tube, that is, to adjust the X-axis position during the measurement process. Due to the different sizes of the ionization chambers, in order to make the sensitive volume of the ionization chambers located at the center of the X-ray main beam, different ionization chambers need to be adjusted in different Y-axis and Z-axis positions.

Finally, by completing the Y-axis and Z-axis movement, the sensitive position of the ionization chamber is at the center of the X-ray beam. Through the position movement of the X axis, the measurement of different specifications of different ionization chambers is completed.

3 is a schematic diagram of the clamp of the ionization chamber adjustment device of the present invention, and FIG. 4 is a top view of the clamp head of the ionization chamber adjustment device of the present invention. As shown in the figure, the clamp specifically includes: a chassis base 73, a support rod 72 and a clamp head 71. The gripper head 71 includes a fixed part 711 and a moving part 710 .

The chassis seat 73 has threaded holes, and is fixed with the three-stage mobile loading platform by screws; the support rod 72 is screwed on the chassis seat 73, and the upper end of the support rod 72 has a socket.

The fixing component 711 is plugged into the socket of the supporting rod 72 by using the connecting rod 7110 . The moving part 710 includes a metal rod 7100. One end of the metal rod 7100 is plugged into the fixed part 711, and the other end is fixed by a connecting piece 7101. The connecting piece 7101 has a screw hole 7102; the clamping part 7103 is sleeved on the metal rod 7100 Above; the adjusting rod 7104 is screwed into the screw hole 7102, and one end is the adjusting head 7105, and the other end is fixed with the clamping part 7103.

When adjusting the adjusting head 7105, the adjusting rod 7104 screwed in the screw hole 7102 moves in parallel with the metal rod 7100, and the adjusting rod 7104 drives the clamping part 7103 and the fixing part 711 to clamp the ionization chamber together.

Specifically, the material of the chassis seat 73 is machine glass, which is a disc with a diameter of 10 centimeters and a thickness of 1 centimeter. There are 9 small threaded holes distributed in a circle, and the chassis seat 73 and the support platform are fixed by screws. There is a slightly larger threaded hole in the center of the chassis seat 73, which can realize the screwing of the support rod 72 and is used to fix the support rod 72.

The material of support bar 72 is plexiglass, and the bar surface of support 7 bar 2 lower ends has thread, can be screwed into chassis seat 73. The upper end of the support rod 72 is a hollow tube with a structure as a socket, which can realize the insertion of the connecting rod 7110 of the clamp head 71, and screw the upper end side of the connecting rod 7110 into the fixing part 711 to realize fixed locking.

The fixing part 711 is a square plexiglass body. The clamping part 7103 is sleeved on the metal rod 7100 and can move along the metal rod. The specific movement stroke is determined by the adjusting rod 7104. The adjusting rod 7104 is rotated by the adjusting head 7105 to realize the clamping part 7103 approaching and moving away from the fixed part 711. Realize the clamping function.

The working process is as follows:

Preliminary installation: Fix the base plate and the three-dimensional adjustment platform of the ionization chamber with screws, and select a specific height support rod to screw into the base plate according to the size of the ionization chamber. Depending on the ionization chamber model, select different fixture heads.

The opposite surfaces of the clamping part and the fixing part of the fixture head can be selected according to different models and shapes of ion chambers. For example, the opposing surfaces of the fixing part and the clamping part are parallel planes or symmetrical arc surfaces. or parallel arcs.

After installing the jig, place the ionization chamber between the moving part and the fixed part of the jig. Tighten the threaded rod to secure the ionization chamber.

Because the size of the ionization chamber is different, the clamp of the present invention needs to fix the ionization chamber in different positions, so the support rods with different lengths can be selected. Because of the special shape and structure of the ionization chamber, different fixture heads can be selected. Finally, the fixation of the ionization chamber is completed.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (7)

1. An ionization chamber regulating device is characterized in that, said ionizing chamber regulating device comprises: a base with a first guide rail on the base; Ionization chamber position adjustment device, including: The first-stage mobile object loading platform is slid on the first guide rail, moves in translation on the first guide rail, and has a second guide rail. The first guide rail is along the X-ray main beam direction, and the second guide rail and the The direction of the first guide rail is vertical; The secondary mobile loading platform is slid on the second guide rail and moves in translation on the second guide rail; The three-level mobile loading platform is connected to the second-level mobile loading platform, and includes a vertical lifting adjustment platform, and the vertical lifting adjustment platform has a clamp to hold the ionization chamber, which is used to adjust the ionization chamber. high; Wherein, the first-level mobile loading platform is adjusted to translate on the first guide rail, the second-level mobile loading platform is translated on the second guide rail, and the vertical lifting adjustment platform adjusts the height of the ionization chamber so that the laser center Aligning with the sensitive volume center of the ionization chamber, the laser center is at the same position as the X-ray main beam center. 2. The ionization chamber adjusting device according to claim 1, wherein the secondary mobile loading platform comprises: a slider slidingly arranged with the second guide rail; One end of the lead screw is connected with the motor, and the other end is connected with the slider, and the lead screw is driven by the motor to drive the slider to slide on the second guide rail. 3. The ionization chamber adjustment device according to claim 1, wherein the vertical lifting adjustment platform has crossed support arms and a first rotating shaft, and the crossing angle of the supporting arms is changed by rotating the first rotating shaft to adjust the height. 4. The ionization chamber adjusting device according to claim 1, wherein the clamp comprises: Chassis seat, the chassis seat has threaded holes, and is fixed to the supporting platform by screws; A support rod is screwed on the chassis seat, and the upper end of the support rod has a socket; A jig head, said jig head comprising: a fixing part, the fixing part is plugged into the socket of the support rod by using a connecting rod; The moving part includes a metal rod, one end of the metal rod is plugged into the fixed part, and the other end is fixed by a connector, and the connector has a screw hole; the clamping part is sleeved on the metal rod The adjusting rod is screwed in the screw hole, and one end is an adjusting head, and the other end is fixed to the clamping part; Wherein, when the adjustment head is adjusted, the adjustment rod screwed in the screw hole moves in parallel with the metal rod, and the adjustment rod drives the clamping part and the fixing part to clamp the ionization chamber together. 5. The ionization chamber regulating device according to claim 4, characterized in that, the material of the chassis base, support rods, fixing parts, connecting rods, clamping parts and connecting parts is plexiglass. 6. The ionization chamber adjustment device according to claim 4, characterized in that, the material of the metal rod and the adjustment rod is metal. 7. The ionization chamber adjustment device according to claim 4, characterized in that, the opposite surface of the fixed part and the clamping part is a plane or an arc-shaped surface, and the opposite surface of the clamping part and the fixed part is a plane or curved surface.