CN210401672U

CN210401672U - Wide-range gamma radiation detector integrating end window type GM tube and cylindrical GM tube

Info

Publication number: CN210401672U
Application number: CN201921214604.0U
Authority: CN
Inventors: 李明旭; 黄浩坤; 李鹏
Original assignee: Xi'an Zhonghe Nuclear Apparatus Co ltd
Current assignee: Xi'an Zhonghe Nuclear Instrument Co.,Ltd.
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-04-24
Anticipated expiration: 2029-07-30

Abstract

The utility model discloses a collect wide range gamma radiation detector of end window type GM pipe and cylinder type GM pipe as an organic whole, which comprises an outer shell, the circular detection window has been seted up to the stack shell on being located the barrel section in surveying the chamber to aviation plug of setting on the shell and the radiation detection mechanism of setting in the shell, be provided with the division board in the shell, form between division board and the installation protecgulum and survey the chamber, form the signal processing chamber between division board and the installation back lid, the radiation detection mechanism is including the signal detection unit of surveying the intracavity and the signal processing unit of signal processing intracavity, the signal detection unit includes cylinder type GM pipe and end window type GM pipe. The utility model relates to a novelty, through installing two kinds of different detection range's detector in a device and windowing to the device wall body, utilize end window type GM pipe detector to survey low energy gamma radiation, utilize cylinder type GM pipe detector to survey high energy gamma radiation, optimize the structure, realize the detection of wide range gamma radiation, practice thrift the cost, portable practicality.

Description

Wide-range gamma radiation detector integrating end window type GM tube and cylindrical GM tube

Technical Field

The utility model belongs to nuclear radiation measuring instrument field, concretely relates to wide range gamma radiation detector who collects end window type GM pipe and cylinder type GM pipe as an organic whole.

Background

In the prior art, a gamma radiation detector for an area in a pipeline generally adopts a GM tube or a proportional counter, wherein the GM tube is a high-energy gamma radiation detector, the energy detection range is 50 keV-3 MeV, the proportional counter is a low-energy gamma radiation detector, the detection efficiency is high when the energy is about 10keV, and the measuring range is single; the existing gamma radiation detector generally only detects low-energy gamma radiation or only detects high-energy gamma radiation, and a radiation dose detector only detecting low-energy gamma radiation cannot accurately detect high-energy radiation, so that the detected data is inaccurate and cannot play a warning role; therefore, two devices are needed to detect gamma radiation in a wide range twice, time and labor are wasted, the existing detector is difficult to meet the detection of energy from 10keV to 3MeV, and the dose rate measurement range is low during low-energy measurement, so that a multifunctional gamma detector with a wide energy response range is lacked nowadays to realize gamma radiation measurement from 10keV to 3 MeV.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that not enough among the prior art is directed against, the utility model provides a collect wide range gamma radiation detector of end window type GM pipe and cylinder type GM pipe as an organic whole, its modern design, through install high energy radiation detector and low energy radiation detector in the stack shell simultaneously, utilize end window type GM pipe detector to survey low energy gamma radiation, utilize cylinder type GM pipe detector to survey high energy gamma radiation, open the window to the device wall body, utilize the division board to fall into the stack shell and survey chamber and signal processing chamber, it is airtight chamber to survey chamber and signal processing chamber, the electromagnetic interference that the during operation produced does not influence each other, optimize the structure, realize the detection of wide range gamma radiation, and the cost is saved, and is portable and practical, and the convenient to popularize and use.

In order to solve the technical problem, the utility model discloses a technical scheme is: collect wide range gamma radiation detector of end window type GM pipe and cylinder type GM pipe as an organic whole, its characterized in that: the aviation plug comprises a shell, an aviation plug arranged on the shell and a radiation detection mechanism arranged in the shell, wherein the shell comprises a barrel body, an installation front cover and an installation rear cover, the installation front cover is used for sealing the barrel body, a partition plate is arranged in the shell, a detection cavity is formed between the partition plate and the installation front cover, a signal processing cavity is formed between the partition plate and the installation rear cover, the barrel body is positioned on a barrel section of the detection cavity and is provided with a circular detection window, the radiation detection mechanism comprises a signal detection unit arranged in the detection cavity and a signal processing unit arranged in the signal processing cavity, the signal detection unit comprises a cylindrical GM pipe and an end window type GM pipe, the cylindrical GM pipe is fixed on the barrel body through a cylindrical GM pipe mounting part, the cylindrical GM pipe mounting part is a cylindrical GM pipe mounting part with a solid structure, and the cylindrical GM pipe mounting part is provided with a cylindrical GM pipe mounting hole and a cylindrical GM pipe mounting part fixing hole, the cylindrical GM pipe is arranged in the cylindrical GM pipe mounting hole, the cylindrical GM pipe mounting component is fixedly mounted on the partition plate through a gasket, the cylindrical GM pipe mounting component is connected with the end window type GM pipe through a detector pressing strip, and the end window type GM pipe extends into the circular detection window; the signal processing unit comprises a signal processing circuit board, a microcontroller and a communication module connected with the microcontroller are integrated on the signal processing circuit board, the aviation plug penetrates through the mounting rear cover to stretch into the signal processing cavity to be connected with the communication module, the signal processing circuit board and the aviation plug are fixedly mounted into a whole, and the cylindrical GM pipe and the end window GM pipe are both connected with the microcontroller.

The wide-range gamma radiation detector integrating the end window type GM tube and the cylindrical GM tube is characterized in that: the installation back is covered and is installed the handle pull ring, and the handle pull ring is door shape handle, door shape handle includes two parallel arrangement's stock and the quarter butt that is used for connecting two stock, the stock is including the first straight-bar and the second straight-bar that connect gradually, the contained angle that first straight-bar and second straight-bar formed is the obtuse angle.

The wide-range gamma radiation detector integrating the end window type GM tube and the cylindrical GM tube is characterized in that: the detector layering is T type detector layering.

The wide-range gamma radiation detector integrating the end window type GM tube and the cylindrical GM tube is characterized in that: and a circular lead sheet is arranged between the circular detection window and the end window type GM tube.

The wide-range gamma radiation detector integrating the end window type GM tube and the cylindrical GM tube is characterized in that: the outer diameter of the circular lead sheet is the same as the inner diameter of the circular detection window, the thickness of the circular lead sheet is 0.05-1.5 mm, a plurality of through holes are formed in the circular lead sheet, and the aperture of each through hole is 0.35-0.4 cm.

The wide-range gamma radiation detector integrating the end window type GM tube and the cylindrical GM tube is characterized in that: and a sealing ring is arranged between the mounting rear cover and the cylinder body.

The wide-range gamma radiation detector integrating the end window type GM tube and the cylindrical GM tube is characterized in that: the cylinder body is a cylindrical cylinder body with a hollow structure, the cylindrical GM pipe installation part is a semi-cylindrical installation part, and the radius of the outer arc surface of the semi-cylindrical installation part is equal to the inner diameter of the detection cavity.

The wide-range gamma radiation detector integrating the end window type GM tube and the cylindrical GM tube is characterized in that: the end window type GM tube is connected with the microcontroller through a first voltage comparator, the first voltage comparator comprises a voltage comparator U1 and an end window type GM tube Z1, the 3 rd pin of the voltage comparator U1 is divided into two paths, one path is connected with a 3.3V power supply through a resistor R4, the other path is grounded through a sliding rheostat RP1 and a resistor R9 in sequence, the 4 th pin of the voltage comparator U1 is connected with the N port of the end window type GM tube Z1 through a resistor R5 and a capacitor C5 in sequence, the N port of the end window type GM tube Z1 and the connecting end of the capacitor C5 are grounded through a resistor R6 and a capacitor C6 which are connected in parallel, the connecting end of the capacitor C5 and the resistor R5 is connected with one end of a resistor R7, the other end of the resistor R7 is grounded, the P port of the end window type GM tube Z1 is connected with a high-voltage power supply through a resistor R1 and a capacitor C2 69553 which are connected in parallel, the first pin of the voltage comparator U6356 is connected with the first voltage comparator U3 through a first path, the other path is the output end of the first voltage comparator.

The wide-range gamma radiation detector integrating the end window type GM tube and the cylindrical GM tube is characterized in that: the cylindrical GM tube is connected with the microcontroller through a second voltage comparator, the second voltage comparator comprises a voltage comparator U2 and a cylindrical GM tube Z2, the 3 rd pin of the voltage comparator U2 is divided into two paths, one path is connected with a 3.3V power supply through a resistor R14, the other path is grounded through a sliding rheostat RP2 and a resistor R19 in sequence, the 4 th pin of the voltage comparator U2 is connected with the N port of the cylindrical GM tube Z2 through a resistor R15 and a capacitor C11 in sequence, the N port of the cylindrical GM tube Z2 and the connecting end of the capacitor C11 are grounded through a resistor R16 and a capacitor C12 which are connected in parallel, the connecting end of the capacitor C11 and the resistor R15 is connected with one end of a resistor R17, the other end of the resistor R17 is grounded, the P port of the cylindrical GM tube Z2 is connected with a high-voltage power supply through a resistor R11 and a capacitor C7 which are connected in parallel, the 1 st pin of the voltage comparator U2 is connected with the first path of the voltage comparator U13 and the first path is connected with the voltage, the other path is the output end of the second voltage comparator.

Compared with the prior art, the utility model has the following advantage:

1. the utility model relates to a novelty, through installing two kinds of different detection range's of detector in a device and windowing to the device wall body, utilize end window type GM pipe detector to survey low energy gamma radiation, utilize cylinder type GM pipe detector to survey high energy gamma radiation, optimize the structure, realize the detection of the gamma radiation of wide range 10keV ~ 3MeV energy, optimize the structure, practice thrift the cost, portable practicality.

2. The utility model discloses a set up two sealed chambeies in the stack shell, be respectively for surveying chamber and process chamber, survey the chamber and be located the stack shell front side, at first stretch into the in-pipe contact detection target object, the detection result is more accurate, will survey chamber and process chamber separation setting, prevent to survey the chamber and produce the interference to the signal processing circuit board in the process chamber at the electromagnetic interference that the during operation probably produced, avoid signal processing circuit board output result to appear great error, influence the use of device.

3. The utility model discloses a set up circular detection window on the stack shell, make low energy section photon pass circular detection window can be better by end window type GM pipe detection, set up circular lead sheet just sets up the through-hole at circular lead sheet, is for shielding low energy section photon, reduces low energy section detection sensitivity, reaches the purpose that still can measure the high dose rate when surveying low energy section, and novel in design is reasonable.

To sum up, the utility model discloses its novel in design is reasonable, through installing high energy radiation detector and low energy radiation detector simultaneously in the stack shell, utilizes end window type GM pipe detector to survey low energy gamma radiation, utilizes cylinder type GM pipe detector to survey high energy gamma radiation, windows the device wall body, utilizes the division board to fall into the stack shell and surveys chamber and signal processing chamber, surveys chamber and signal processing chamber and is airtight chamber, the electromagnetic interference that the during operation produced does not influence each other, optimize the structure, realize the detection of wide range gamma radiation, practice thrift the cost, and is portable practical, convenient to popularize and use.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a bottom view of the present invention.

Fig. 3 is a right side view of the present invention.

Fig. 4 is a schematic view of the structure of the handle pull ring of the present invention.

Fig. 5 is a schematic view of the connection relationship between the detector pressing bar and the cylindrical GM tube mounting component of the present invention.

Fig. 6 is a view taken along direction a of fig. 5.

Fig. 7 is a schematic block circuit diagram of the present invention.

Fig. 8 is a schematic diagram of a first voltage comparator circuit according to the present invention.

Fig. 9 is a schematic diagram of a second voltage comparator circuit according to the present invention.

Description of reference numerals:

1, a cylinder body; 2, installing a front cover; 3, mounting a rear cover;

4-end window type GM tube; 5, pressing a detector bar;

6-cylindrical GM tube mounting parts; 7-circular detection window;

8, an aviation plug; 9-a signal processing circuit board; 10-handle pull ring;

11-a first screw; 12-a gasket; 13-a partition plate;

14-a detection cavity; 15-a signal processing chamber; 16-cylindrical GM tube;

17-a first voltage comparator; 18-a second voltage comparator;

19-a microcontroller; 20-a communication module;

21-cylindrical GM pipe mounting hole; 22-cylindrical GM pipe mounting part fixing hole.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3 and fig. 7, the present invention comprises a housing, an aviation plug 8 disposed on the housing, and a radiation detection mechanism disposed in the housing, wherein the housing comprises a barrel 1, an installation front cover 2 and an installation rear cover 3 for sealing the barrel 1, a partition plate 13 is disposed in the housing, a detection cavity 14 is formed between the partition plate 13 and the installation front cover 2, a signal processing cavity 15 is formed between the partition plate 13 and the installation rear cover 3, a circular detection window 7 is disposed on a barrel section of the detection cavity 14 of the barrel 1, the radiation detection mechanism comprises a signal detection unit disposed in the detection cavity 14 and a signal processing unit disposed in the signal processing cavity 15, the signal detection unit comprises a cylindrical GM tube 16 and an end window GM tube 4, the cylindrical GM tube 16 is fixed on the barrel 1 through a cylindrical GM tube mounting part 6, the cylindrical GM tube mounting component 6 is a cylindrical GM tube mounting component with a solid structure, a cylindrical GM tube mounting hole 21 and a cylindrical GM tube mounting component fixing hole 22 are formed in the cylindrical GM tube mounting component 6, the cylindrical GM tube 16 is arranged in the cylindrical GM tube mounting hole 21, the cylindrical GM tube mounting component 6 is fixedly mounted on the partition plate 13 through a gasket 12, the cylindrical GM tube mounting component 6 is connected with the end window GM tube 4 through a detector pressing strip 5, and the end window GM tube 4 extends into the circular detection window 7; the signal processing unit comprises a signal processing circuit board 9, the signal processing circuit board 9 is integrated with a microcontroller 19 and a communication module 20 connected with the microcontroller 19, the aviation plug 8 penetrates through the installed rear cover 3 and extends into the signal processing cavity 15 to be connected with the communication module 20, the signal processing circuit board 9 and the aviation plug 8 are fixedly installed into a whole, and the cylindrical GM tube 16 and the end window GM tube 4 are both connected with the microcontroller 19.

It should be noted that two sealed cavities, namely a detection cavity 14 and a processing cavity 15, are arranged in the cylinder body 1, the detection cavity 14 is positioned at the front side of the cylinder body 1 and firstly extends into the pipeline to contact a detection target object, so that the detection result is more accurate, the detection cavity 14 and the processing cavity 15 are separately arranged, the electromagnetic interference possibly generated by the detection cavity 14 during working is prevented from generating interference on the signal processing circuit board 9 in the processing cavity 15, and the output result of the signal processing circuit board 9 is prevented from generating larger error to influence the use of the device; the aviation plug 8 is a communication interface connected with the communication module 20, has good environmental resistance, can improve the reliability and stability of communication, reduces the loss of signals in the communication process, has the characteristic of being quickly connected and separated with a communication cable, reduces the loss of the communication interface, and prolongs the service life of equipment; the prior art can not use the same equipment to detect gamma radiation of high-low energy, the detection range is single, a single detector can only be generally responsible for detecting the energy of a section, it needs to use two devices to detect the gamma radiation of wide range, it is time-consuming and labor-consuming to measure the gamma radiation of wide range, the utility model discloses in the end window type GM pipe 4 is the gamma radiation detector of low energy, the cylinder type GM pipe 16 is the gamma radiation detector of high energy, the detection of gamma radiation of high-low wide energy can be realized by combining two detectors, the structure is compact, the use is simple; the microcontroller is preferably a C8051F124 microcontroller; the communication module 20 preferably employs a MAX485 chip.

In this embodiment, the installation rear cover 3 is provided with a handle pull ring 10, the handle pull ring 10 is a door-shaped handle, the door-shaped handle comprises two long rods 10-1 arranged in parallel and a short rod 10-2 for connecting the two long rods 10-1, the long rod 10-1 comprises a first straight rod 10-1-1 and a second straight rod 10-1-2 connected in sequence, and an included angle formed by the first straight rod 10-1-1 and the second straight rod 10-1-2 is an obtuse angle.

It should be noted that, as shown in fig. 4, the extending direction of the first straight rod 10-1-1 is parallel to the length direction of the barrel 1, the second straight rod 10-1-2 is arranged towards the side away from the aviation plug 8, and the width of the second straight rod 10-1-2 is not greater than the width of the barrel 1, so that the pipe diameter width of the pipe where the target object to be detected is located is limited and is not affected by the size of the handle pull ring 10, the application range is wider, and meanwhile, the handle pull ring 10 in the pipe can be more striking visually, so that visual illusion is prevented from being generated when the barrel needs to be pulled out, and the pipe deviates from the correct handle pull ring position.

In this embodiment, the detector pressing bar 5 is a T-shaped detector pressing bar.

It should be noted that, as shown in fig. 5 and fig. 6, the purpose of connecting the cylindrical GM tube installation part 6 and the end window GM tube 4 by the probe layering 5 is to fix the cylindrical GM tube installation part 6 and the end window GM tube 4 in the probing cavity 14, the structure is compact, the probe device will not shake due to external vibration when using the apparatus, and the result of measurement is inaccurate, the probe layering 5 adopts a T-type probe layering, the horizontal rod part of the T-type probe layering extrudes the end window GM tube 4 to fix it in the circular probing window 7, the vertical rod part of the T-type probe layering is fixedly connected with the cylindrical GM tube installation part 6 by the first screw 11, so that the cylindrical GM tube installation part 6, the probe layering 5 and the end window GM tube 4 are fixed as a whole, the end window GM tube 4 is connected with the cylindrical GM tube installation part 6 by using the minimum amount of material, reduce the consumptive material, alleviate the device weight, do benefit to the operation, cylinder type GM pipe installation component fixed orifices 22 is for seting up the internal screw thread hole, and the second screw passes division board 13 and gasket 12 in proper order and stretches into in cylinder type GM pipe installation component fixed orifices 22 with cylinder type GM pipe installation component fixed orifices 22 screw-thread fit.

In this embodiment, a circular lead sheet is disposed between the circular detection window 7 and the end window type GM tube 4.

In this embodiment, the outer diameter of the circular lead sheet is the same as the inner diameter of the circular detection window 7, the thickness of the circular lead sheet is 0.05mm to 1.5mm, a plurality of through holes are formed in the circular lead sheet, and the aperture of each through hole is 0.35cm to 0.4 cm.

It should be noted that the circular detection window 7 is provided to enable low-energy photons to pass through the circular detection window 7 and be better detected by the end window type GM tube 4, and the circular lead sheet is provided with a through hole to shield the low-energy photons, reduce the detection sensitivity of the low-energy photons, and achieve the purpose of detecting a high dose rate when detecting the low-energy photons.

In this embodiment, a seal ring is disposed between the rear cover 3 and the barrel 1.

In this embodiment, the barrel 1 is a cylindrical barrel with a hollow structure, the cylindrical GM tube installation component 6 is a semi-cylindrical installation component, and the radius of the outer arc surface of the semi-cylindrical installation component is equal to the inner diameter of the detection cavity 14.

It should be noted that the cylindrical GM tube installation component 6 is a semi-cylindrical installation component, which saves materials and reduces the weight of the device, the radius of the outer arc surface of the semi-cylindrical installation component is equal to the inner diameter of the probe cavity 14, so that the cylindrical GM tube installation component 6 is tightly attached to the cylinder body 1, and meanwhile, the cylindrical GM tube 16 installed in the cylindrical GM tube installation component 6 is tightly fixed in the cylindrical GM tube installation component 6, so that no shaking occurs during the use of the device, and the measurement result is accurate.

In this embodiment, the end window type GM tube 4 is connected to the microcontroller 19 through a first voltage comparator 17, the first voltage comparator 17 includes a voltage comparator U1 and an end window type GM tube Z1, the 3 rd pin of the voltage comparator U1 is divided into two paths, one path is connected to a 3.3V power supply through a resistor R4, the other path is grounded through a slide rheostat RP1 and a resistor R9 in sequence, the 4 th pin of the voltage comparator U1 is connected to the N port of the end window type GM tube Z1 through a resistor R5 and a capacitor C5 in sequence, the N port of the end window type GM tube Z1 and the connection end of a capacitor C5 are grounded through a resistor R6 and a capacitor C6 connected in parallel, the connection end of the capacitor C5 and the resistor R5 is connected to one end of the resistor R7, the other end of the resistor R7 is grounded, the P port of the end window type GM tube Z1 is connected to a high voltage power supply through a resistor R1 and a capacitor C1 connected in parallel, and the voltage comparator U1 is divided into two paths, one path is connected with the 3 rd pin of the voltage comparator U1 through a resistor R3, and the other path is the output end of the first voltage comparator 17.

In this embodiment, the cylinder GM transistor 16 is connected to the microcontroller 19 through the second voltage comparator 18, the second voltage comparator 18 includes a voltage comparator U2 and a cylinder GM transistor Z2, the 3 rd pin of the voltage comparator U2 is divided into two paths, one path is connected to the 3.3V power supply through the resistor R14, the other path is grounded through the slide rheostat RP2 and the resistor R19 in turn, the 4 th pin of the voltage comparator U2 is connected to the N port of the cylinder GM transistor Z2 through the resistor R15 and the capacitor C11 in turn, the N port of the cylinder GM transistor Z2 and the connection end of the capacitor C11 are grounded through the parallel resistor R16 and the capacitor C12, the connection end of the capacitor C11 and the resistor R15 is connected to one end of the resistor R17, the other end of the resistor R17 is grounded, the P port of the cylinder GM transistor Z2 is connected to the high voltage power supply through the parallel resistor R11 and the capacitor C7, and the first pin 1 of the voltage comparator U2, one path is connected with the 3 rd pin of the voltage comparator U2 through a resistor R13, and the other path is the output end of the second voltage comparator 18.

It should be noted that the end window type GM tube 4 and the cylindrical GM tube 16 are both connected to the microcontroller 19 through wires, the wires pass through the partition plate 13, and the positions where the wires are matched with the partition plate 13 are sealed by using a sealant, so that the sealing performance of the detection chamber 14 and the treatment chamber 15 is ensured.

In practical use, as shown in fig. 8 and 9, the voltage comparator U1 and the voltage comparator U2 are both LMV7235, the end-window GM tube Z1 is LND73118, the cylindrical GM tube Z2 is ZP1314, the resistors R1 and R11 are both 1M Ω, the resistors R2 and R12 are both 4.7k Ω, the resistors R3 and R13 are both 551k Ω, the resistors R4 and R14 are both 330k Ω, the resistors R5 and R5 are both 2k Ω, the resistors R5, R5 and R5 are both 220k Ω, the resistors R5 and R5 are both 3k Ω, the resistors R5 and R5 are both 10k, the sliding resistor RP 72 and the sliding resistor RP 72 are both 200k, the capacitors R5 and the capacitors pF 5, the capacitors pF 5 and the capacitors 5 are both pfc 72, the capacitors 5 are p 72 and the capacitors C5C 72, the capacitors are p 72 and the capacitors p 72C 3k, the capacitors are p 72C 3k, the capacitors p 72C 3k and, The capacitance values of the capacitor C4, the capacitor C9 and the capacitor C10 are all 0.1 muF, the capacitance values of the capacitor C5 and the capacitor C11 are all 1nF, and the capacitance values of the capacitor C6 and the capacitor C12 are 47 pF.

The utility model discloses during the use, the centre gripping equipment pushes detection device in the pipeline through handle pull ring 10, survey 14 and begin to survey gamma radiation after reaching the target position, when gamma radiation energy section is 10keV ~ 50keV in the pipeline, gamma radiation sees through circular detection window 7 and passes circular lead plate, end window type GM pipe 4 receives gamma radiation irradiation production electric charge of low energy section 10keV ~ 50keV, handle through first voltage comparator 17, and input to microcontroller 19, microcontroller 19 exports data through communication module 20; when the gamma radiation energy section of the external field is 50 keV-3 MeV, the end window type GM tube 4 has no response, the cylindrical GM tube 16 receives gamma radiation irradiation of the high energy section 50 keV-3 MeV to generate charges, the charges are processed by the second voltage comparator 18, the microcontroller 19 outputs data through the communication module 20, the data output by the communication module 20 are connected with a communication cable through the aviation plug 8 and input to the microcontroller 19, the detection data are transmitted to the pipeline external monitoring platform, after the detection work is finished, the clamping equipment pulls the detection device out of the pipeline through the handle pull ring 10, two detectors with different detection ranges are installed in one device, the cavity of the detection cavity 14 of the device is windowed, the end window type GM tube is used for detecting low-energy gamma radiation, the cylindrical GM tube is used for detecting high-energy gamma radiation, the structure is optimized, and the detection of the gamma radiation with the wide-range energy of 10 keV-3 MeV is realized, saving cost, portability and practicability.

The aforesaid, only be the embodiment of the utility model discloses an it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.

Claims

1. Collect wide range gamma radiation detector of end window type GM pipe and cylinder type GM pipe as an organic whole, its characterized in that: the radiation detection device comprises a shell, an aviation plug (8) arranged on the shell and a radiation detection mechanism arranged in the shell, wherein the shell comprises a barrel body (1), an installation front cover (2) and an installation rear cover (3) which are used for sealing the barrel body (1), a partition plate (13) is arranged in the shell, a detection cavity (14) is formed between the partition plate (13) and the installation front cover (2), a signal processing cavity (15) is formed between the partition plate (13) and the installation rear cover (3), a round detection window (7) is arranged on a barrel section of the detection cavity (14) of the barrel body (1), the radiation detection mechanism comprises a signal detection unit arranged in the detection cavity (14) and a signal processing unit arranged in the signal processing cavity (15), the signal detection unit comprises a cylindrical GM pipe (16) and an end window GM pipe (4), the cylindrical GM pipe (16) is fixed on the barrel body (1) through a GM pipe mounting component (6), the cylindrical GM pipe mounting component (6) is a cylindrical GM pipe mounting component with a solid structure, a cylindrical GM pipe mounting hole (21) and a cylindrical GM pipe mounting component fixing hole (22) are formed in the cylindrical GM pipe mounting component (6), the cylindrical GM pipe (16) is arranged in the cylindrical GM pipe mounting hole (21), the cylindrical GM pipe mounting component (6) is fixedly mounted on the partition plate (13) through a gasket (12), the cylindrical GM pipe mounting component (6) is connected with the end window GM pipe (4) through a detector pressing strip (5), and the end window GM pipe (4) extends into the circular detection window (7); the signal processing unit includes signal processing circuit board (9), integrated on signal processing circuit board (9) have microcontroller (19) and with communication module (20) that microcontroller (19) are connected, aviation plug (8) pass installation back lid (3) stretch into to signal processing chamber (15) in be connected with communication module (20), signal processing circuit board (9) and aviation plug (8) fixed mounting are as an organic whole, cylinder type GM pipe (16) and end window type GM pipe (4) all are connected with microcontroller (19).

2. The integrated wide range gamma radiation detector of claim 1, wherein: the installation back cover (3) is provided with a handle pull ring (10), the handle pull ring (10) is a door-shaped handle, the door-shaped handle comprises two long rods (10-1) which are arranged in parallel and a short rod (10-2) used for connecting the two long rods (10-1), the long rod (10-1) comprises a first straight rod (10-1-1) and a second straight rod (10-1-2) which are connected in sequence, and an included angle formed by the first straight rod (10-1-1) and the second straight rod (10-1-2) is an obtuse angle.

3. The integrated wide range gamma radiation detector of claim 1, wherein: the detector pressing bar (5) is a T-shaped detector pressing bar.

4. The integrated wide range gamma radiation detector of claim 1, wherein: and a round lead sheet is arranged between the round detection window (7) and the end window type GM pipe (4).

5. The end-window type GM tube and cylindrical GM tube integrated wide-range gamma radiation detector of claim 4, wherein: the outer diameter of the circular lead sheet is the same as the inner diameter of the circular detection window (7), the thickness of the circular lead sheet is 0.05-1.5 mm, a plurality of through holes are formed in the circular lead sheet, and the aperture of each through hole is 0.35-0.4 cm.

6. The integrated wide range gamma radiation detector of claim 1, wherein: and a sealing ring is arranged between the mounting rear cover (3) and the barrel body (1).

7. The integrated wide range gamma radiation detector of claim 1, wherein: the cylinder body (1) is a cylindrical cylinder body with a hollow structure, the cylindrical GM pipe installation part (6) is a semi-cylindrical installation part, and the radius of the outer arc surface of the semi-cylindrical installation part is equal to the inner diameter of the detection cavity (14).

8. The integrated wide range gamma radiation detector of claim 1, wherein: the end window type GM tube (4) is connected with a microcontroller (19) through a first voltage comparator (17), the first voltage comparator (17) comprises a voltage comparator U1 and an end window type GM tube Z1, the 3 rd pin of the voltage comparator U1 is divided into two paths, one path is connected with a 3.3V power supply through a resistor R4, the other path is grounded through a slide rheostat RP1 and a resistor R9 in sequence, the 4 th pin of the voltage comparator U1 is connected with the N port of the end window type GM tube Z1 through a resistor R5 and a capacitor C5 in sequence, the connecting end of the N port of the end window type GM tube Z1 and the connecting end of the capacitor C5 is grounded through a resistor R6 and a capacitor C6 which are connected in parallel, the connecting end of the capacitor C5 and the resistor R5 is connected with one end of the resistor R7, the other end of the resistor R7 is grounded, the P port of the end window type GM tube Z1 is connected with a high-voltage power supply pin 1 through a resistor R365 and a capacitor C3623 which are connected in parallel, one path is connected with the No. 3 pin of the voltage comparator U1 through a resistor R3, and the other path is the output end of the first voltage comparator (17).

9. The end-window type GM tube and cylindrical GM tube integrated wide-range gamma radiation detector of claim 6, wherein: the cylinder type GM tube (16) is connected with the microcontroller (19) through a second voltage comparator (18), the second voltage comparator (18) comprises a voltage comparator U2 and a cylinder type GM tube Z2, the 3 rd pin of the voltage comparator U2 is divided into two paths, one path is connected with a 3.3V power supply through a resistor R14, the other path is grounded through a slide rheostat RP2 and a resistor R19 in sequence, the 4 th pin of the voltage comparator U2 is connected with the N port of the cylinder type GM tube Z2 through a resistor R15 and a capacitor C11 in sequence, the N port of the cylinder type GM tube Z2 and the connecting end of a capacitor C11 are grounded through a resistor R16 and a capacitor C12 which are connected in parallel, the connecting end of the capacitor C11 and the resistor R15 is connected with one end of a resistor R17, the other end of the resistor R17 is grounded, the P port of the cylinder type GM tube Z2 is connected with a high-voltage power supply through a resistor R11 and a capacitor C7 which are connected in parallel, the second pin 2 is divided into two paths, one path is connected with the No. 3 pin of the voltage comparator U2 through a resistor R13, and the other path is the output end of the second voltage comparator (18).