Finger-type ionization chamber for dose verification

Abstract

The utility model discloses a finger-type ionization chamber for dose verification, which belongs to the technical field of ionization chambers and comprises an ionization chamber handle, one side of the ionization chamber handle is provided with a chamber wall, the inner wall of the ionization chamber handle is in threaded connection with a waterproof jackscrew, two through holes are arranged in the waterproof jackscrew, the inner wall of the ionization chamber handle is in threaded connection with a sleeve, and the sleeve is provided with a through hole. A waterproof top ring is attached to one side of the sleeve and arranged outside the sleeve in a sleeving mode. According to the utility model, through the arrangement of the waterproof jackscrew and the waterproof top ring, when the waterproof jackscrew rotates, one side of the waterproof top ring can be extruded, so that the waterproof top ring is deformed, the waterproof top ring can be tightly attached to the waterproof jackscrew, the chamber wall and the sleeve, and gaps and through holes generated among the waterproof jackscrew, the chamber wall and the sleeve can be sealed; the sealing performance of the finger-type ionization chamber is improved, external moisture is prevented from entering the finger-type ionization chamber, the service life of the finger-type ionization chamber is prolonged, and the accuracy of a measurement result is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to ionization chamber technical field especially relates to a finger type ionization chamber for dose verification. BACKGROUND

[0002] The finger type ionization chamber plays a key role in radiotherapy, and its core functions include dose measurement, dose verification and quality control and equipment calibration. It assesses the radiation dose by measuring the amount of electric charge generated by ionizing radiation, ensures that the dose output by the treatment equipment is consistent with the treatment plan, and avoids dose errors.

[0003] The existing finger type ionization chamber may be eroded by moisture in actual application. External moisture may penetrate into the interior of the ionization chamber through the gap of the ionization chamber, which may cause damage to the internal electronic components, thereby shortening the service life of the finger type ionization chamber. At the same time, the intrusion of moisture may also cause changes in temperature and humidity inside the ionization chamber, which may affect the density and conductivity of the gas inside the ionization chamber, ultimately affecting the accuracy of the measurement results. UTILITY MODEL CONTENT

[0004] The utility model aims at: in order to solve prior art, the existing finger type ionization chamber may be eroded by moisture in actual application. External moisture may penetrate into the interior of the ionization chamber through the gap of the ionization chamber, which may cause damage to the internal electronic components, and may affect the density and conductivity of the gas inside the ionization chamber, thereby affecting the accuracy of the measurement results. A finger type ionization chamber for dose verification is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A finger type ionization chamber for dose verification, comprising an ionization chamber handle, the ionization chamber handle is installed with chamber wall on one side, the waterproof top screw is connected with the inner wall of the ionization chamber handle, two through holes are formed in the waterproof top screw, the sleeve is connected with the inner wall of the ionization chamber handle, the waterproof top ring is attached to one side of the sleeve, the waterproof top ring is sleeved on the sleeve, and the sleeve extends to the outside of the ionization chamber handle.

[0007] As a further description of the above technical scheme:

[0008] The inner wall of the ionization chamber handle is connected with the extension tube, one end of the extension tube is attached to one end of the sleeve, the other end of the extension tube is attached to one side of the chamber wall, the chamber wall is provided with a high-pressure aluminum pipe, the high-pressure aluminum pipe is attached with an aluminum pipe top screw on one end, and the outer wall of the aluminum pipe top screw is connected with the inner wall of the chamber wall in a threaded manner.

[0009] As a further description of the above technical scheme:

[0010] The total jackscrew is provided with a cable locking pipe at one end, the cable locking pipe is provided with a first high-voltage insulation piece at the other end, the first high-voltage insulation piece is provided with a second high-voltage insulation piece outside, the second high-voltage insulation piece is provided with a high-voltage overprotection sleeve outside, and the high-voltage overprotection sleeve is installed in the chamber wall.

[0011] As a further description of the above technical solution:

[0012] The first high-voltage insulation piece is provided with a first virtual ground sleeve at one side, and the other side of the first virtual ground sleeve is provided with a second main insulation piece.

[0013] As a further description of the above technical solution:

[0014] The second main insulation piece is provided with a first main insulation piece outside, the first main insulation piece is provided with a second virtual ground sleeve outside, the first main insulation piece is provided with a virtual ground protection assembly at one side, and the virtual ground protection assembly is provided with a high-voltage overprotection sleeve outside.

[0015] As a further description of the above technical solution:

[0016] The high-voltage overprotection sleeve is provided with a sleeve ring outside, the sleeve ring is installed in the chamber wall, and the chamber wall is provided with a collecting electrode at one side.

[0017] As described above, due to the adoption of the above technical solution, the beneficial effects of the present application are:

[0018] 1、In the utility model, through setting up waterproof jackscrew and waterproof jackscrew ring, waterproof jackscrew can extrude one side of waterproof jackscrew ring when rotating, so that waterproof jackscrew ring can be deformed, thereby waterproof jackscrew ring, chamber wall and sleeve pipe can be tightly adhered, and the gap and through hole between waterproof jackscrew, chamber wall and sleeve pipe can be sealed, the sealing property of the finger type ionization chamber is improved, the water from outside is prevented from entering, and the service life of the finger type ionization chamber and the accuracy of the measurement result are improved.

[0019] 2、In the utility model, through setting up virtual ground protection assembly, virtual ground protection assembly can protect the electronic intensifier in the ionization chamber, prevent it from being damaged by gas breakdown or high-voltage discharge, thereby the service life of the finger type ionization chamber is improved, virtual ground protection assembly can also shield the interference signals such as background radiation and electronic noise, so that the detector only responds to the real ionization event signal, thereby the accuracy of the measurement is improved. ACCURACY

[0020] Fig. 1 It is a three-dimensional structure schematic view of the utility model;

[0021] Fig. 2 It is a chamber wall cross section structure schematic view of the utility model.

[0022] Legend: 1, ionization chamber handle; 2, chamber wall; 3, waterproof top wire; 4, waterproof top ring; 5, through hole; 6, sleeve; 7, extension tube; 8, high pressure aluminum pipe; 9, aluminum pipe top wire; 10, total top wire; 11, cable locking tube; 12, first high voltage insulation; 13, first virtual ground sleeve; 14, sleeve ring; 15, high voltage overprotection sleeve; 16, virtual ground protection assembly; 17, first main insulation; 18, second virtual ground sleeve; 19, collector; 20, second main insulation; 21, second high voltage insulation. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0024] Please refer to Figs. 1-2 The utility model provides a technical scheme: a kind of for dose verification finger type ionization chamber, including ionization chamber handle 1, ionization chamber handle 1 side is equipped with chamber wall 2, the inner wall of ionization chamber handle 1 is connected with waterproof top wire 3, two through holes 5 are formed in waterproof top wire 3, the inner wall of ionization chamber handle 1 is connected with sleeve 6, sleeve 6 one side is attached with waterproof top ring 4, waterproof top ring 4 is set in sleeve 6 outer, sleeve 6 one end extends to the outside of ionization chamber handle 1, the inner wall of ionization chamber handle 1 is connected with extension tube 7, extension tube 7 one end is attached with sleeve 6 one end, extension tube 7 other end is attached with chamber wall 2 one side, chamber wall 2 is equipped with high pressure aluminum pipe 8, high pressure aluminum pipe 8 one end is attached with aluminum pipe top wire 9, the outer wall of aluminum pipe top wire 9 is connected with the inner wall of chamber wall 2 by screw thread, the inner wall of high pressure aluminum pipe 8 is connected with total top wire 10 by screw thread, total top wire 10 one end is equipped with cable locking tube 11, cable locking tube 11 other end is connected with first high voltage insulation 12 by screw thread, first high voltage insulation 12 is equipped with second high voltage insulation 21, second high voltage insulation 21 is equipped with high voltage overprotection sleeve 15, high voltage overprotection sleeve 15 is installed in chamber wall 2.

[0025] The embodiment is specific as follows: since the outer wall of the waterproof jackscrew 3 and the inner wall of the ionization chamber handle 1 are provided with threads, and the outer wall of the waterproof jackscrew 3 is threadedly connected with the inner wall of the ionization chamber handle 1, when the waterproof jackscrew 3 rotates in the ionization chamber handle 1, the waterproof jackscrew 3 can move along the inner wall of the ionization chamber handle 1, and when the waterproof jackscrew 3 moves to the waterproof jackscrew 4, one side of the waterproof jackscrew 3 can extrude one side of the waterproof jackscrew 4, and since the waterproof jackscrew 4 is blocked by the sleeve 6, the waterproof jackscrew 4 can be deformed in the process of being extruded by the waterproof jackscrew 3, so as to be tightly attached to the waterproof jackscrew 3, the chamber wall 2 and the sleeve 6, thereby sealing the gap and the through hole 5 between the waterproof jackscrew 3, the chamber wall 2 and the sleeve 6, improving the sealing performance of the finger-shaped ionization chamber, avoiding the entry of external moisture, and improving the service life of the finger-shaped ionization chamber and the accuracy of the measurement results. By arranging the cable locking pipe 11, the cable locking pipe 11 can lock and fix the cable inserted into the finger-shaped ionization chamber, so as to avoid the deviation and loosening of the cable in the finger-shaped ionization chamber.

[0026] The first high-voltage insulation part 12 is sleeved with the first virtual ground sleeve 13 on one side, the second main insulation part 20 is arranged on the other side of the first virtual ground sleeve 13, the first main insulation part 17 is arranged on the outer wall of the second main insulation part 20, the second virtual ground sleeve 18 is sleeved on the outer wall of the first main insulation part 17, the virtual ground protection assembly 16 is arranged on one side of the first main insulation part 17, the high-voltage overprotection sleeve 15 is sleeved on the virtual ground protection assembly 16, the sleeve ring 14 is sleeved on the high-voltage overprotection sleeve 15, the sleeve ring 14 is arranged in the chamber wall 2, and the collection electrode 19 is arranged on one side of the chamber wall 2.

[0027] The embodiment is specific as follows: the virtual ground protection assembly 16 can protect the electron enhancer in the ionization chamber from being damaged by gas breakdown or high-voltage discharge, thereby improving the service life of the finger-shaped ionization chamber, the virtual ground protection assembly 16 can improve the uniformity of the electric field, thereby improving the performance of the detector, the virtual ground protection assembly 16 can help shield the background radiation, electronic noise and other interference signals, so that the detector only responds to the real ionization event signal, thereby improving the accuracy of the measurement, and the high-voltage overprotection sleeve 15 can protect the virtual ground protection assembly 16 from being damaged by high voltage.

[0028] Working principle: when in use, since the outer wall of the waterproof top screw 3 is threadedly connected with the inner wall of the ionization chamber handle 1, the waterproof top screw 3 can move along the inner wall of the ionization chamber handle 1 when rotating in the ionization chamber handle 1, and can extrude one side of the waterproof top ring 4, since the waterproof top ring 4 is blocked by the sleeve 6, the waterproof top ring 4 can be deformed when extruded by the waterproof top screw 3, thereby being tightly fitted with the waterproof top screw 3, the chamber wall 2 and the sleeve 6, and further sealing the gap and the through hole 5 between the waterproof top screw 3, the chamber wall 2 and the sleeve 6, avoiding the outside water from entering the finger-shaped ionization chamber, the virtual ground protection assembly 16 can protect the electron intensifier in the ionization chamber, preventing it from being damaged by gas breakdown or high-voltage discharge and the like, can improve the uniformity of the electric field, and can help shield the background radiation, electronic noise and other interference signals, so that the detector only responds to the real ionization event signal.

[0029] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A finger chamber for dose verification, comprising an ionization chamber handle (1), characterized in that: The ionization chamber handle (1) is provided with a chamber wall (2) on one side, the waterproof top screw (3) is threadedly connected to the inner wall of the ionization chamber handle (1), two through holes (5) are formed in the waterproof top screw (3), the sleeve (6) is threadedly connected to the inner wall of the ionization chamber handle (1), the waterproof top ring (4) is attached to one side of the sleeve (6), the waterproof top ring (4) is sleeved on the outside of the sleeve (6), and the sleeve (6) extends to the outside of the ionization chamber handle (1).

2. A finger chamber for dose verification according to claim 1, characterized in that: The lengthening pipe (7) is connected to the inner wall of the ionization chamber handle (1), one end of the lengthening pipe (7) is attached to one end of the sleeve (6), the other end of the lengthening pipe (7) is attached to one side of the chamber wall (2), the high-voltage aluminum pipe (8) is arranged in the chamber wall (2), the aluminum pipe top screw (9) is attached to one end of the high-voltage aluminum pipe (8), and the outer wall of the aluminum pipe top screw (9) is threadedly connected to the inner wall of the chamber wall (2).

3. A finger chamber for dose verification according to claim 2, characterized in that: The total top screw (10) is threadedly connected to the inner wall of the high-voltage aluminum pipe (8), the cable locking pipe (11) is arranged at one end of the total top screw (10), the first high-voltage insulation piece (12) is threadedly connected to the other end of the cable locking pipe (11), the second high-voltage insulation piece (21) is arranged outside the first high-voltage insulation piece (12), the high-voltage overprotection sleeve (15) is sleeved outside the second high-voltage insulation piece (21), and the high-voltage overprotection sleeve (15) is arranged in the chamber wall (2).

4. A finger chamber for dose verification according to claim 3, characterized in that: The first virtual ground sleeve (13) is sleeved on one side of the first high-voltage insulation piece (12), and the second main insulation piece (20) is arranged on the other side of the first virtual ground sleeve (13).

5. A finger chamber for dose verification according to claim 4, characterized in that: The first main insulation piece (17) is arranged on the outer wall of the second main insulation piece (20), the second virtual ground sleeve (18) is sleeved outside the first main insulation piece (17), the virtual ground protection assembly (16) is arranged on one side of the first main insulation piece (17), and the high-voltage overprotection sleeve (15) is sleeved outside the virtual ground protection assembly (16).

6. A finger chamber for dose verification according to claim 5, characterized in that: The sleeve ring (14) is sleeved outside the high-voltage overprotection sleeve (15), the sleeve ring (14) is arranged in the chamber wall (2), and the collecting electrode (19) is arranged on one side of the chamber wall (2).

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