CN217389075U

CN217389075U - Built-in early warning protection device for portable X-ray source

Info

Publication number: CN217389075U
Application number: CN202220824465.9U
Authority: CN
Inventors: 列剑平; 李卓凡; 刘桂梅; 刘宏江
Original assignee: Nanjing Zhuoshi Electric Co ltd
Current assignee: Nanjing Zhuoshi Electric Co ltd
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-09-06
Anticipated expiration: 2032-04-11

Abstract

The utility model discloses a built-in early warning protection device for a portable X-ray source, which comprises a buffer shell, wherein the buffer shell is divided into an air cavity and an oil cavity by a piston, a telescopic rod is arranged in the air cavity, and an X-ray assembly body is arranged in the oil cavity; the telescopic rod is a five-stage telescopic rod; an oil level rising alarm external connection end sheet, a reduced pipe voltage external connection end sheet, an oil level rising limit power-off protection external connection end sheet, an oil level falling alarm external connection end sheet and an oil level falling limit protection action external connection end sheet are arranged on the outer wall of the tail portion of the shell. The utility model discloses change the stroke according to the telescopic link, the short circuit ring improves X ray source operating condition, surpasss design temperature start protection outage function to contact short circuit start-up warning, reduction tube voltage, pipe current, improves the oneself protective capacities of X ray machine, and the device has simple structure, with low costs and easily popularizes and applies on portable X ray source.

Description

Built-in early warning protection device for portable X-ray source

Technical Field

The utility model relates to a portable X ray source is with built-in early warning protection device belongs to the nondestructive test field.

Background

The X-ray source has X-ray tube as its inner part, cathode of tungsten filament, metal target as anode, DC high voltage between the cathode and the anode to release great amount of electrons accelerated in high voltage field and flying from the cathode to the anode to lose kinetic energy, so that only 0.9% of the electrons are converted into X-ray and the rest are converted into heat energy.

When the X-ray machine system starts to detect and continuously works, heat generated by the X-ray source is continuously accumulated, the temperature of insulating oil rises and expands, and the pressure inside the X-ray source increases along with the rise of the oil temperature and even causes the X-ray source to explode because the X-ray tube assembly is sealed in the shell; when the working environment changes, the temperature of the insulating oil is reduced, the volume of the insulating oil also shrinks, devices are exposed inside the X-ray tube assembly, the distribution of electric fields inside the X-ray tube is changed, and high-voltage discharge occurs.

The prior art mainly adopts two modes: the metal corrugated pipe relieves the expansion of insulating oil through telescopic deformation, the corrugated pipe has small telescopic space and high processing technology, the insulating oil is often leaked and leaked due to defects controlled by the processing technology when the metal corrugated pipe works, in addition, the small telescopic space can cause a local non-insulating oil space to appear in a source at low temperature to cause high-voltage discharge of an X-ray source, when the oil injection amount is excessive, the insulating oil of the X-ray source can seep out at high temperature, and when the oil injection amount is excessive, the expansion crack of an expansion drum can be caused; in addition, the rubber telescopic capsule is fixed by a spring steel ring and a flange, rubber aging cracks and breakage are easily generated at the mouth of the rubber telescopic capsule under the action of the spring steel ring for a long time, so that insulating oil is leaked, and the portable X-ray source is safely operated.

SUMMERY OF THE UTILITY MODEL

The purpose of the invention is as follows: in order to overcome the not enough that exists among the prior art, the utility model provides a portable X ray source is with built-in early warning protection device changes the stroke according to the telescopic link, and the short circuit ring starts the warning to the contact short circuit, reduces tube voltage, tube current and improves X ray source operating condition, surpasss design temperature and starts protection outage function, improves the self-protection ability of X ray machine, and the device has simple structure, with low costs and easily popularizes and applies on portable X ray source.

The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a built-in early warning protection device for a portable X-ray source, which comprises a buffer shell, wherein the buffer shell is divided into an air cavity and an oil cavity by a piston, a telescopic rod is arranged in the air cavity, and an X-ray assembly body is arranged in the oil cavity; the telescopic rod is a five-stage telescopic rod and comprises a first stage rod, a second stage rod, a third stage rod, a fourth stage rod and a fifth stage rod respectively, the first stage rod is connected with the shell of the buffer, a first reset spring is arranged in the first stage rod, an oil level rising limit power-off protection contact is arranged at the tail part of the first stage rod, an oil level rising power-off protection short-circuit ring is arranged at the tail part of the second stage rod, an oil level rising alarm contact is arranged at the tail part of the third stage rod, an oil level falling alarm short-circuit ring and an oil level rising alarm and voltage reduction short-circuit ring are arranged at the tail part of the fourth stage rod, and an oil level falling limit power-off protection contact and an oil level falling limit power-off protection short-circuit ring are arranged at the tail part of the fifth stage rod; an oil level rising alarm external connection end sheet, a reduced pipe voltage external connection end sheet, an oil level rising limit power-off protection external connection end sheet, an oil level falling alarm external connection end sheet and an oil level falling limit protection action external connection end sheet are arranged on the outer wall of the tail portion of the shell.

Preferably, each level of rod in the telescopic rod is provided with a guide groove and a guide block, and adjacent rods move along the guide groove through the guide block.

Preferably, an end cover is arranged at the end part of the air cavity, a hollow pipe is arranged on the end cover, and the hollow pipe is connected with the end cover through a soft diaphragm sealing gasket.

A use method of a built-in early warning protection device for a portable X-ray source comprises the following steps:

s1, setting the working oil temperature of an X-ray source to be 60-minus 5 ℃, designing the highest temperature of internal insulating oil of the X-ray source to be not more than 80 ℃ and the lowest temperature to be minus 10 ℃, and setting each oil level according to the change characteristic of the oil expansion coefficient and margin;

s2, setting an alarm oil level by an insulating oil buffer of the X-ray source: setting the temperature of 0 ℃ and 50 ℃ as the early warning oil level of the reducing and expanding body of the insulating oil in the X-ray source;

s3, continuously increasing the oil level by 10 percent (55 ℃) when the temperature of the insulating oil exceeds 50 ℃ to reduce the voltage of the tube and improve the working state of the X-ray source by the tube current;

s4, in order to prevent the insulating oil from exceeding the design limit and damaging the X-ray source, setting the insulating oil level in the X-ray source as a protective action oil site when the temperature of the insulating oil is-5 ℃ and 70 ℃;

s5, setting the oil level of the X-ray source for producing oil injection at 20 ℃ as a reference point, setting alpha as the expansion coefficient (1/DEG C) of oil, setting S as the sectional area of the inner diameter of the X-ray source sealing barrel, setting delta T as the temperature variation between each corresponding action value and 20 ℃, setting the expansion variation of insulating oil and the movement of the piston in a one-to-one correspondence relationship, setting the movement stroke of the telescopic rod and the working stroke calculation formula of the short-circuit ring corresponding to each contact as follows:

has the advantages that: the invention adopts the air cavity and the oil cavity as a whole, the volume change of a closed space is in correspondence with the pressure of liquid or gas of the closed space based on the fact that the expansion of insulating oil is in direct proportion to the self temperature of the insulating oil in a certain temperature range, the volume change of the insulating oil is adjusted by utilizing the volume change of the air cavity to regulate and control the pressure change of the insulating oil along with the expansion of the temperature, the air cavity is internally provided with a telescopic rod with a contact and a short circuit ring, according to the change stroke of the telescopic rod, the short circuit ring is in short circuit with the contact to start an alarm, the tube voltage is reduced, the tube current improves the working state of an X-ray source, the function of starting, protecting and cutting off the power when the temperature exceeds the designed temperature, the self-protection capability of the X-ray machine is improved, and the device has the advantages of simple structure, low cost and easy popularization and application on the portable X-ray source.

Drawings

FIG. 1 is a schematic view of an X-ray source of the present patent;

FIG. 2 is a schematic view of an X-ray assembly of the present patent;

FIG. 3 is a schematic diagram of the contact points of the top cover of the built-in early warning protection buffer for the portable X-ray source of the present patent;

FIG. 4 is a schematic diagram of a built-in early warning protection buffer for a portable X-ray source according to the present invention;

FIG. 5 is a schematic view of a single-joint structure of an expansion link of the built-in early warning protection buffer for the portable X-ray source of the present patent;

FIG. 6 is a schematic view of the initial telescopic rod state of the built-in early warning protection buffer for the portable X-ray source of the present patent;

FIG. 7 is a schematic diagram showing the state of an expansion link of an upper threshold of an insulating oil expansion of a built-in early warning protection buffer for a portable X-ray source according to the present invention;

FIG. 8 is a schematic view of the state of the telescopic rod of the built-in early warning protection buffer for reducing the lower threshold value of the insulating oil for the portable X-ray source of the present patent;

in the figure, a buffer body 1, an X-ray module body 2, a telescopic link 11, a piston 12, a return spring 13, an X-ray tube 21, a voltage doubler rectifier 22, a fixed bracket 23, a high-voltage cable power socket 24, a filament power socket 25, an oil level rise alarm external connection terminal 31, a tube voltage lowering external connection terminal 32, an oil level rise limit power-off protection external connection terminal 33, an oil level fall alarm external connection terminal 34, an oil level fall limit protection action external connection terminal 35, a soft diaphragm gasket 36, an externally threaded hollow tube 37, 1 st section 1, 112, a telescopic link 11, a telescopic link 2, telescopic link 3

rd sections

113, 114, a telescopic link 4 th section, 115, a telescopic link 5 th section, an oil level rise limit power-off protection contact 131, an oil level rise alarm contact 211, a tube voltage lowering contact 221, an oil level rise power-off protection short-circuit 232, an oil level rise alarm and voltage-reduction short circuit 322, oil level reduction alarm contact 341, oil level reduction alarm short-circuit ring 442, oil level reduction limit power-off protection contact 451, oil level reduction limit power-off protection short-

circuit rings

552, 51, telescopic rod positioning slide, short-circuit ring 52, contact 53.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the present invention relates to an X-ray source comprising: built-in battery, X ray subassembly, modulation high voltage power supply, modulation filament power, wireless communication module, X ray voltage control module, the required X ray of emission nondestructive test under the controller through X ray machine system is controlled, wherein the X ray subassembly includes: the buffer body 1, the X-ray assembly body 2, the X-ray tube 21, the voltage doubling rectifier 22, the fixing support 23, the high-voltage cable power socket 24, the filament power socket 25, the X-ray tube 21 and the voltage doubling rectifier 22 are placed in a sealing barrel by the fixing support 23 and fixed, and insulating oil is filled for insulation and heat dissipation; the modulated high-voltage power supply is used for voltage-multiplying rectification power supply of the X-ray tube through a high-voltage cable power socket 24 to generate direct-current high voltage, and the modulated filament power supply is used for supplying power to a filament of the X-ray tube through a filament power socket 25;

as shown in fig. 2, the insulating oil damper includes: the buffer comprises a telescopic rod 11, a piston 12 and a return spring 13, wherein the shell of the buffer body 1 is circular and is divided into an air cavity and an oil cavity which are isolated by the piston 12 and are in sealing connection with the X-ray assembly body 2, the piston 12 is in full contact with the highest point of the oil level of insulating oil, and the return spring 13 assists the piston 12 to be consistent with the oil level of the insulating oil and the return telescopic rod 11 to be normal after moving;

as shown in fig. 2, an expansion link 11 is arranged in an air cavity of a buffer body 1, the end of the expansion link is connected with an upper end cover plate of the air cavity, the other end of the expansion link is connected with a piston 12, the expansion link 11 has 5 sections of rods, the upper end cover plate of the air cavity is connected into a 1 st section of rod, other 4 sections of rods can freely extend and retract, each section of rod can be in close contact with the other section of rod, and the other 4 sections of rods are equal in length except that the 1 st section of rod is slightly shorter than the other sections of rods.

As shown in fig. 3, 2 through holes are covered on the sealed air cavity and are sealed by soft diaphragm gaskets 36, so that the sealed air cavity can be kept balanced with the external atmospheric pressure, the inner walls of the through holes are provided with threads, and hollow pipes 37 with matched external threads are adopted to further ensure the sealing in the air cavity of the buffer body 1;

as shown in fig. 3, each contact 53 on each single section of the telescopic rod 11 is correspondingly connected with an oil level rise alarm external connection end piece 31, a reduced pipe voltage external connection end piece 32, an oil level rise limit power-off protection external connection end piece 33, an oil level fall alarm external connection end piece 34 and an oil level fall limit protection action external connection end piece 35 of the air cavity upper cover through connecting wires, so as to realize electrical connection with the X-ray voltage control module;

as shown in fig. 5, a positioning slide 51 is provided at the inner side of each section of rod to ensure that the telescopic rod does not rotate relatively and moves smoothly when moving, a short circuit ring 52 or a contact 53 is provided on each section of rod, the contact 53 is connected with a corresponding connecting end piece of the upper cover of the air cavity through a connecting wire, and when short circuit occurs, a triggering instruction can be provided for the X-ray voltage control module to perform related control operations;

as shown in fig. 4, the end of the 1 st section 111 of the telescopic rod has an oil level rise limit power-off protection contact 131, and when the 2 nd section 112 of the telescopic rod is shortened to a predetermined position, the oil level rise limit power-off protection short-circuit ring 232 on the 2 nd section 112 of the telescopic rod is short-circuited with the oil level rise limit power-off protection contact 131 to send a power-off instruction of the X-ray source. The outer side of the end part with the larger outer diameter of the 2 nd section 112 of the telescopic rod is provided with an oil level rising alarm contact 211 and a pipe voltage reducing contact 221, when the 3 rd section 113 of the telescopic rod moves to a preset position, the oil level rising alarm and voltage reducing short circuit ring 322 is sequentially in short circuit with the oil level rising alarm contact 211 and the pipe voltage reducing contact 221, and an oil temperature rising expansion alarm instruction and a control pipe voltage and pipe current reducing instruction are sent. The telescopic link 4 th section rod 114 is stretched to a preset position, the oil level reduction alarm short-circuit ring 442 on the rod is in short circuit connection with the oil level reduction alarm contact 341 on the telescopic link 3 rd section 113 rod, and an oil level reduction alarm instruction can be sent. When the telescopic rod section 5 rod 115 is stretched to a preset position, the oil level reduction limit power-off protection short-circuit ring 552 is in short circuit with the oil level reduction limit power-off protection contact 451 on the telescopic rod section 4 rod 114, and an instruction for cutting off the power supply of the X-ray source is sent.

It should be noted that, the calibration method for the action stroke of the short-circuit loop corresponding to each connection point of the telescopic rod is as follows:

the initial state of the telescopic rod is that the 1 st section, the 2 nd section and the 3 rd section are in a complete stretching state, the 4 th section and the 5 th section are in a compression state, and when the temperature is at the lower limit of the threshold value, the telescopic rod is in a complete stretching state of each rod.

Based on the fact that the expansion of insulating oil is in direct proportion to the temperature of the insulating oil in a certain temperature range, the volume change of a closed space corresponds to the pressure of liquid or gas of the insulating oil, an air cavity and an oil cavity are integrated, the volume of the insulating oil is adjusted through the volume change of the air cavity to adjust and control the pressure change of the insulating oil along with the temperature expansion, a telescopic rod with contacts and a short circuit ring is arranged in the air cavity, the short circuit ring can start an alarm on the contacts in a short circuit mode according to the change stroke of the telescopic rod, the tube voltage is reduced, the tube current improves the working state of an X-ray source, the function of starting, protecting and cutting off the power beyond the designed temperature is achieved, and the self-protection capability of the X-ray machine is improved.

The patent provides a built-in early warning protection method and a device for a portable X-ray source, and a plurality of methods and ways for realizing the technical scheme are provided, the above description is only a preferred simple implementation way of the patent, for a person skilled in the art, on the premise of not departing from the principle of the invention, a plurality of improvements and decorations are made, which are also regarded as the protection scope of the patent, and all components which are not clear in the embodiment can be realized by the prior art.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, a plurality of modifications and decorations can be made, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a built-in early warning protection device is used to portable X ray source which characterized in that: the X-ray radiation device comprises a buffer shell, wherein the buffer shell is divided into an air cavity and an oil cavity through a piston, a telescopic rod is arranged in the air cavity, and an X-ray component body is arranged in the oil cavity; the telescopic rod is a five-stage telescopic rod and comprises a first stage rod, a second stage rod, a third stage rod, a fourth stage rod and a fifth stage rod respectively, the first stage rod is connected with the shell of the buffer, a first reset spring is arranged in the first stage rod, an oil level rising limit power-off protection contact is arranged at the tail part of the first stage rod, an oil level rising power-off protection short-circuit ring is arranged at the tail part of the second stage rod, an oil level rising alarm contact is arranged at the tail part of the third stage rod, an oil level falling alarm short-circuit ring and an oil level rising alarm and voltage reduction short-circuit ring are arranged at the tail part of the fourth stage rod, and an oil level falling limit power-off protection contact and an oil level falling limit power-off protection short-circuit ring are arranged at the tail part of the fifth stage rod; an oil level rising alarm external connection end sheet, a reduced pipe voltage external connection end sheet, an oil level rising limit power-off protection external connection end sheet, an oil level falling alarm external connection end sheet and an oil level falling limit protection action external connection end sheet are arranged on the outer wall of the tail portion of the shell.

2. The built-in early warning protection device for the portable X-ray source according to claim 1, characterized in that: each level of rod in the telescopic rod is provided with a guide groove and a guide block, and adjacent rods move along the guide groove through the guide block.

3. The built-in early warning protection device for the portable X-ray source according to claim 1, characterized in that: the end part of the air cavity is provided with an end cover, the end cover is provided with a hollow pipe, and the hollow pipe is connected with the end cover through a soft diaphragm sealing gasket.

4. The built-in early warning protection device for the portable X-ray source according to claim 1, characterized in that: the length of the first-stage rod is smaller than that of the second-stage rod, and the lengths of the second-stage rod, the third-stage rod, the fourth-stage rod and the fifth-stage rod are equal.