Radiation protection circuit and irradiation equipment

Abstract

The utility model discloses a radiation protection circuit and irradiation equipment, the radiation protection circuit comprises a plurality of switches, the plurality of switches are electrically connected with a high voltage generator, and when the plurality of switches are all closed, the high voltage generator is triggered to work. According to the utility model, the use safety of irradiation equipment can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of irradiation equipment, in particular to a radiation protection circuit and irradiation equipment. Background Art

[0002] At present, irradiation technology is widely used in the fields of medical treatment and food processing. In the medical field, the use of high-energy X-rays or gamma rays to treat blood to solve transfusion-related graft-versus-host disease has also received increasing attention. The radiation cavity shielding body of the irradiation equipment is generally formed into a closed space by means of electronic door locks or mechanical door locks. However, whether it is an electronic door lock or a mechanical door lock, there is a risk that the operator will mistakenly open the X-ray generator when the shielding door is not closed, or open the shielding door of the irradiation equipment when the X-ray generator is still in working condition, thereby causing X-ray leakage and causing serious safety accidents. Especially in the field of X-ray detection, the shielding door may need to be opened / closed frequently several times a day, further exacerbating the above safety risks. Utility Model Content

[0003] The main purpose of the utility model is to provide a radiation protection circuit, aiming to increase the use safety of irradiation equipment.

[0004] To achieve the above-mentioned purpose, the radiation protection circuit proposed by the utility model includes:

[0005] A plurality of switches are electrically connected to the high voltage generator, and when the plurality of switches are all closed, the high voltage generator is triggered to operate.

[0006] In one embodiment, the irradiation device further comprises a power supply;

[0007] A plurality of the switches are arranged in series between the power supply end of the high-voltage generator and the output end of the power supply. When the plurality of switches are closed, the power supply is controlled to be electrically connected to the high-voltage generator so that the power supply supplies power to the high-voltage generator.

[0008] In one embodiment, the high voltage generator includes at least one interlock circuit;

[0009] A plurality of the switches are arranged in series on the interlocking circuit; when the plurality of the switches are closed, the interlocking circuit is controlled to be turned on to trigger the high voltage generator to work.

[0010] In one embodiment, the interlocking circuit has two circuits, and the two interlocking circuits are respectively a first interlocking circuit and a second interlocking circuit;

[0011] The plurality of switches are divided into a first switch group and a second switch group;

[0012] The first switch group is arranged in series on the first interlocking circuit;

[0013] The second switch group is arranged in series on the second interlocking circuit;

[0014] When the first switch group and the second switch group control the first interlock circuit and the second interlock circuit to be turned on, the high voltage generator is triggered to operate.

[0015] In one embodiment, each of the switches includes a trigger body and a relay, wherein the trigger body and the coil of the relay are arranged in series, and the contacts of the relay are arranged in series on the interlocking circuit; when the trigger body is closed, the contacts of the relay are controlled to close to control the conduction of the interlocking circuit.

[0016] In one embodiment, the irradiation device further comprises a radiation source, and the radiation source is electrically connected to the high voltage generator;

[0017] The radiation protection circuit further comprises:

[0018] A control unit, wherein a control end of the control unit is connected to the radiation source, and the control unit is also connected to a feedback end of each of the switches;

[0019] The switch is also used to output a switch feedback signal to the control unit when closed, so that the control unit controls the ray source to emit rays when receiving the switch feedback signals output by multiple switches.

[0020] In one embodiment, at least one of the plurality of said switches is an electromagnetic lock switch;

[0021] The control unit is also connected to the controlled end of the electromagnetic lock switch, and the control unit is also used to control the electromagnetic lock switch to be attracted when receiving a signal indicating that the radiation source is working.

[0022] The utility model also provides an irradiation device, comprising:

[0023] Power supply;

[0024] Radiation source;

[0025] a high-voltage generator, the high-voltage generator being electrically connected to the ray source and the power supply, respectively, and the high-voltage generator being used to convert the power supply into a high-voltage power supply and then output it to the ray source to supply power to the ray source; and

[0026] As the radiation protection circuit mentioned above, the radiation protection circuit is electrically connected to the high voltage generator.

[0027] In one embodiment, the radiation protection circuit is arranged in series between the power supply end of the high-voltage generator and the output end of the power supply; the radiation protection circuit is used to control the high-voltage generator to be electrically connected to the power supply when it is turned on, so that the power supply supplies power to the high-voltage generator.

[0028] In one embodiment, the power supply end of the high voltage generator is connected to the output end of the power supply;

[0029] The high voltage generator includes at least one interlock circuit;

[0030] The radiation protection circuit is arranged in series on the interlock circuit; when the radiation protection circuit is turned on, it controls the interlock circuit to be turned on, so as to trigger the high-voltage generator to start working and convert the power supply into a high-voltage power supply and then output it to the radiation source.

[0031] In one embodiment, the irradiation device further comprises:

[0032] A lead room, wherein the lead room is provided with a containing cavity and at least one equipment door;

[0033] The ray source is disposed in the accommodating cavity;

[0034] The switch in the radiation protection circuit is arranged on the device door.

[0035] In one embodiment, the equipment door includes a normally open door and a normally closed door;

[0036] The switches in the radiation protection circuit include an electromagnetic lock switch and a travel switch; wherein,

[0037] The electromagnetic lock switch is arranged on the normally open door;

[0038] The travel switch is arranged on the normally closed door.

[0039] The utility model arranges a plurality of switches electrically connected to the high-voltage generator, so that the high-voltage generator can work to provide a high-voltage power source only when the plurality of switches are closed, and the number, type and position of the plurality of switches can be set according to different application scenarios, so that when the plurality of switches are closed, the irradiation equipment is just controlled to be in a closed state, so that the high-voltage generator works only when the irradiation equipment is in a closed state, thereby improving the safety of the irradiation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0041] Figure 1 This is a functional module diagram of an embodiment of the radiation protection circuit of the utility model;

[0042] Figure 2 This is a functional module diagram of another embodiment of the radiation protection circuit of the utility model;

[0043] Figure 3 This is a schematic diagram of the circuit structure of an embodiment of the radiation protection circuit of the utility model;

[0044] Figure 4 The utility model is a schematic diagram of the circuit structure of a high voltage generator in the irradiation equipment of the present invention.

[0045] Description of Figure Numbers:

[0046] Label name Label name 10 High voltage generator 30 Radiation source 20 Power supply

[0047] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0048] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0049] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0050] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0051] At present, irradiation technology is widely used in the fields of medical treatment and food processing. In the medical field, the use of high-energy X-rays or gamma rays to treat blood to solve transfusion-related graft-versus-host disease has also received increasing attention. The radiation chamber shield of the irradiation equipment generally forms a closed space by means of electronic door locks or mechanical door locks. However, both electronic door locks and mechanical door locks have the possibility of operators mistakenly opening the X-ray generator when the shielding door is not closed, or opening the shielding door of the irradiation equipment when the X-ray generator is still in working state, thereby causing X-ray leakage and causing serious safety accidents. Especially in the field of blood irradiation, the shielding door may need to be opened / closed frequently several times a day, further exacerbating the above safety risks.

[0052] In order to solve the above problems, the utility model proposes a radiation protection circuit, which is applied to an irradiation device. The irradiation device includes a high voltage generator 10. Figures 1 to 3 In one embodiment, the radiation protection circuit comprises:

[0053] A plurality of switches are electrically connected to the high voltage generator 10 , and when the plurality of switches are all closed, the high voltage generator 10 is triggered to work.

[0054] The irradiation equipment includes a power supply 20, a high voltage generator 10 and a radiation source 30. The power supply 20 is used to supply power to the high voltage generator 10. The high voltage generator 10 is used to convert the power supply 20 into a high voltage power supply and output it to the radiation source 30, so that the radiation source 30 can emit radiation. The high voltage generator 10 can be divided into two types of high voltage generators 10 with an interlocking circuit and without an interlocking circuit. Therefore, in this embodiment, the positions of multiple switches can be set according to the type of the high voltage generator 10. When the high voltage generator 10 in the irradiation equipment is a high voltage generator 10 without interlocking protection, multiple switches can be set in series between the power supply end of the high voltage generator 10 and the power supply 20. In this way, only when multiple switches are closed, the power supply 20 can supply power to the high voltage generator 10, so that the high voltage generator 10 can be powered to work. When the high voltage generator 10 is a high voltage generator 10 with interlock protection, multiple switches can be connected in series on the interlock protection circuit. When the multiple switches are closed, the interlock circuit is turned on. The high voltage generator 10 can work only when it is detected that the interlock circuit is turned on.

[0055] In addition, the number and type of multiple switches can be set according to the actual application scenario. For example, multiple switches can include a travel switch, an electromagnetic lock switch, a key switch and an emergency stop switch. Generally, the travel switch is installed on the rear door that is not often opened, the electromagnetic lock switch is installed on the front door that is often opened, and the emergency stop switch and the key switch are installed in a position that is convenient for the operator to access. Among them, the travel switch, also known as the limit switch, is a commonly used low-current master electrical appliance. It uses the collision of the moving parts of the production machinery to make its contacts move to connect or disconnect the control unit to achieve a certain control purpose. A limit switch can be set on the shielding door of each shielding cavity of the irradiation equipment. When the staff closes all the shielding doors, multiple limit switches are closed. At this time, the high-voltage generator 10 can work to provide a high-voltage power supply to the radiation source 30, so that the radiation source 30 can emit X-rays; when the staff opens any shielding door, the corresponding switch is turned off. At this time, the high-voltage generator 10 cannot work, and the radiation source 30 stops emitting X-rays. An electromagnetic lock switch can be set on the normally open equipment door. After receiving the signal that the radiation source 30 is turned on, the electromagnetic lock is attracted, and its suction can protect the operator from accidentally opening the front door when the source is open. At the same time, the key switch can be turned on when the equipment is not in use, and the key can be pulled out, so that the source cannot be opened when non-staff operate the equipment. It is understandable that multiple switches of different types can be set according to different application scenarios, so that when the staff closes the irradiation equipment, multiple switches are closed, so that the high-voltage generator 10 can only work when the irradiation equipment is in a closed state, thereby improving the safety of the irradiation equipment.

[0056] The utility model is electrically connected to the high-voltage generator 10 by setting multiple switches, so that the high-voltage generator 10 can only work to provide high-voltage power to the radiation source 30 when the multiple switches are all closed, and the number, type and position of the multiple switches can be set according to different application scenarios, so that when the multiple switches are all closed, the irradiation equipment is just controlled to be in a closed state, so that the high-voltage generator 10 only works when the irradiation equipment is in a closed state, protecting the staff from radiation, and improving the safety of the irradiation equipment. At the same time, the circuit cost of the utility model is low and it is convenient and easy to understand, and can be applied to equipment or systems with radiation sources 30 in different scenarios according to actual conditions.

[0057] Reference Figure 1 In one embodiment, the irradiation device further includes a power supply 20;

[0058] A plurality of the switches are arranged in series between the power supply end of the high-voltage generator 10 and the output end of the power supply 20. When the plurality of switches are closed, the power supply 20 is controlled to be electrically connected to the high-voltage generator 10 so that the power supply 20 supplies power to the high-voltage generator 10.

[0059] It can be understood that the circuit of the high-voltage generator 10 itself is generally divided into two types: with an interlocking protection circuit and without an interlocking protection circuit. When the applied high-voltage generator 10 is different, the electrical connection relationship between the multiple switches and the high-voltage generator 10 is also different. In one embodiment, the applied high-voltage generator 10 is a high-voltage generator 10 without an interlocking protection circuit, then the multiple switches can be arranged in series between the power supply end of the high-voltage generator 10 and the output end of the power supply 20. In this way, when the multiple switches are closed, the high-voltage generator 10 is electrically connected to the power supply 20, so that the high-voltage generator 10 can be powered to start working. The multiple switches can be arranged in series between the positive terminal or the negative terminal of the high-voltage generator 10 and the power supply 20, or they can be arranged at the positive terminal and the negative terminal of the high-voltage generator 10 respectively. Refer to Figure 1 , Figure 1 This is a functional module diagram of an embodiment of a radiation protection circuit, wherein the multiple switches include a travel switch, an electromagnetic lock switch, a key switch, and an emergency stop switch, wherein the travel switch is arranged in series between the high-voltage generator 10 and the positive terminal of the power supply 20, and the electromagnetic lock switch, the key switch, and the emergency stop switch are arranged in series between the high-voltage generator 10 and the negative terminal of the power supply 20. When the travel switch, the electromagnetic lock switch, the key switch, and the emergency stop switch are all closed, the irradiation equipment is in a closed state, and the power supply 20 can supply power to the high-voltage generator 10, and the high-voltage generator 10 can work at this time, so that the high-voltage generator 10 only works when the irradiation equipment is in a closed state, thereby improving the safety of the irradiation equipment.

[0060] Reference Figure 2 , in one embodiment, the high voltage generator 10 includes at least one interlock circuit;

[0061] The multiple switches are arranged in series on the interlocking circuit; when the multiple switches are closed, the interlocking circuit is controlled to be turned on to trigger the high voltage generator 10 to work.

[0062] It is understandable that the circuit of the high voltage generator 10 itself is generally divided into two types: with an interlock protection circuit and without an interlock protection circuit. When the applied high voltage generator 10 is different, the electrical connection relationship between the multiple switches and the high voltage generator 10 is also different. In one embodiment, the applied high voltage generator 10 is a high voltage generator 10 with an interlock protection circuit, and the multiple switches can be arranged in series on the interlock circuit of the high voltage generator 10. In this arrangement, when the multiple switches are all closed, the interlock circuit of the high voltage generator 10 is turned on, so that the high voltage generator 10 can start working only when the interlock circuit is detected to be turned on.

[0063] In one embodiment, the interlocking circuit has two circuits, and the two interlocking circuits are respectively a first interlocking circuit and a second interlocking circuit;

[0064] The plurality of switches are divided into a first switch group and a second switch group;

[0065] The first switch group is arranged in series on the first interlocking circuit;

[0066] The second switch group is arranged in series on the second interlocking circuit;

[0067] When the first switch group and the second switch group control the first interlock circuit and the second interlock circuit to be turned on, the high voltage generator 10 is triggered to operate.

[0068] In this embodiment, the high voltage generator 10 includes two interlocking circuits, a first interlocking circuit and a second interlocking circuit. Correspondingly, the plurality of switches can also be divided into a first switch group and a second switch group, and the first switch group and the second switch group are arranged on two interlocking circuits. Figure 2 , Figure 2This is a functional module diagram of an embodiment of a radiation protection circuit. The high-voltage generator 10 includes two interlocking circuits, a first interlocking circuit and a second interlocking circuit. The multiple switches include a travel switch, an electromagnetic lock switch, a key switch and an emergency stop switch. The travel switch is arranged in series on the first interlocking circuit, and the electromagnetic lock switch, the key switch and the emergency stop switch are arranged in series on the second interlocking circuit. When the travel switch, the electromagnetic lock switch, the key switch and the emergency stop switch are all closed, the irradiation equipment is in a closed state, the first interlocking circuit and the second interlocking circuit are turned on, and the high-voltage generator 10 can only work when it detects that the first interlocking circuit and the second interlocking circuit are both turned on, so that the high-voltage generator 10 only works when the irradiation equipment is in a closed state, thereby improving the safety of the irradiation equipment.

[0069] In one embodiment, each of the switches includes a trigger body and a relay, wherein the trigger body and the coil of the relay are arranged in series, and the contacts of the relay are arranged in series on the interlocking circuit; when the trigger body is closed, the contacts of the relay are controlled to close to control the conduction of the interlocking circuit.

[0070] Specifically, a relay and a switch can be provided on the interlocking circuit of the high voltage generator 10, referring to Figure 3 , Figure 3 This is a schematic diagram of the circuit structure of an embodiment of a radiation protection circuit. One end of the normally open end of the travel switch, electromagnetic lock switch, key switch and emergency stop switch is connected to the power supply end (depending on whether the control end is PNP input or NPN input, the connected power supply end is high level or low level), and the other end is connected to the IN signal of the control unit and the relay power supply end (non-common end) on the interlocking circuit. When the switch is closed, the control unit obtains a level signal, and the corresponding relay can be powered on and closed, and the control contact is closed to make the interlocking circuit conductive. Figure 4 , Figure 4 This is a schematic diagram of the circuit structure of an embodiment of the high-voltage generator 10. The contacts of the relays corresponding to the electromagnetic lock switch, the emergency stop switch and the key switch are connected to one interlocking circuit, and the relays corresponding to the two rear door travel switches are connected to another interlocking circuit. In this way, only when the emergency stop switch, the key switch, the electromagnetic lock switch and the travel switch are closed at the same time, can the relay simultaneously close the normally open contacts, so that both interlocking circuits are turned on. The high-voltage generator 10 can start working only when it detects that both interlocking circuits are turned on, so as to provide high voltage for the radiation source.

[0071] Reference Figures 1 to 3 In one embodiment, the irradiation device further includes a ray source 30, and the ray source 30 is electrically connected to the high voltage generator 10;

[0072] The radiation protection circuit further comprises:

[0073] A control unit, wherein a control end of the control unit is connected to the ray source 30, and the control unit is also connected to a feedback end of each of the switches;

[0074] The switch is also used to output a switch feedback signal to the control unit when closed, so that the control unit controls the ray source 30 to emit rays when receiving the switch feedback signals output by multiple switches.

[0075] In this embodiment, the control unit can be implemented by using a microprocessor such as MCU, CPLD, FPGA, etc. The control unit can be an original processor in the irradiation equipment, or an additional processor dedicated to radiation protection. One end of the switch can be connected to the receiving end of the control unit, so that when the switch is turned on, it can output a high-level or low-level switch feedback signal to the control unit, so that the control unit can perform corresponding control according to the received switch feedback signal. Specifically, the control unit can only allow the issuance of open source instructions when receiving the switch feedback signal fed back after all switches are closed, that is, after all switches are closed so that the irradiation equipment is in a closed state, the ray source 30 can emit rays based on the control of the control unit. In this way, when any switch is not closed, that is, there is a safety hazard in using the irradiation equipment, the control unit will not control the ray source 30 to work. Only when all switches are closed so that the irradiation equipment is in a closed state, the control unit can control the ray source 30 to work, thereby improving the safety of the irradiation equipment.

[0076] In one embodiment, at least one of the plurality of said switches is an electromagnetic lock switch;

[0077] The control unit is also connected to the controlled end of the electromagnetic lock switch, and is further used to control the electromagnetic lock switch to be closed when receiving a signal indicating that the radiation source 30 is working.

[0078] It is understandable that when the irradiation equipment is working normally, there may be a situation where the staff accidentally open the door. Therefore, in this embodiment, a switch can be implemented by using an electromagnetic lock switch. The electromagnetic lock switch can be set on the equipment door of the irradiation equipment. In this way, when the control unit receives a signal representing that the radiation source 30 is working, that is, when the radiation source 30 is controlled to work, the electromagnetic lock switch is controlled to be attracted. The suction force of the electromagnetic lock can ensure that the equipment door will not be opened by the staff, thereby avoiding the safety problem caused by the staff accidentally opening the equipment door when the source is open.

[0079] The utility model also provides an irradiation device, characterized in that it comprises:

[0080] Power supply 20;

[0081] A radiation source 30;

[0082] a high voltage generator 10, wherein the high voltage generator 10 is electrically connected to the ray source 30 and the power supply 20, respectively, and the high voltage generator 10 is used to convert the power supply 20 into a high voltage power and then output it to the ray source 30 to supply power to the ray source 30; and

[0083] As the radiation protection circuit described above, the radiation protection circuit is electrically connected to the high voltage generator 10. In one embodiment, the radiation protection circuit is arranged in series between the power supply end of the high voltage generator 10 and the output end of the power supply 20; when the radiation protection circuit is turned on, it is used to control the high voltage generator 10 to be electrically connected to the power supply 20, so that the power supply 20 supplies power to the high voltage generator 10.

[0084] In one embodiment, the high voltage generator 10 is a high voltage generator 10 without an interlock circuit. Figure 1 , Figure 1 This is a functional module diagram of an embodiment of a radiation protection circuit. The radiation protection circuit includes a control unit, a travel switch, an electromagnetic lock switch, a key switch, and an emergency stop switch, etc., wherein the travel switch is arranged in series between the positive terminal of the high-voltage generator 10 and the power supply 20, and the electromagnetic lock switch, the key switch, and the emergency stop switch are arranged in series between the high-voltage generator 10 and the negative terminal of the power supply 20. When the travel switch, the electromagnetic lock switch, the key switch, and the emergency stop switch are all closed, the irradiation equipment is in a closed state, and the power supply 20 can supply power to the high-voltage generator 10, and at this time, the high-voltage generator 10 can convert the power supply 20 into a high-voltage power supply and output it to the radiation source 30. The feedback ends of the multiple switches are also connected to the control unit, and the switches output corresponding switch feedback signals to the control unit when they are closed. When all the switches are closed and the switch feedback signals are sent to the control unit, the control unit allows the issuance of open source instructions, that is, after all the switches are closed so that the irradiation equipment is in a closed state, the radiation source 30 can emit radiation based on the control of the control unit. With such arrangement, the control unit can control the radiation source 30 to operate only when all switches are closed so that the irradiation device is in a closed state, thereby improving the safety of the irradiation device.

[0085] In another embodiment, the power supply end of the high voltage generator 10 is connected to the output end of the power supply 20;

[0086] The high voltage generator 10 includes at least one interlocking circuit;

[0087] The radiation protection circuit is arranged in series on the interlock circuit; when the radiation protection circuit is turned on, it controls the interlock circuit to be turned on, so as to trigger the high-voltage generator 10 to start working and convert the power supply 20 into a high-voltage power supply and then output it to the radiation source 30.

[0088] In another embodiment, the high voltage generator 10 is a high voltage generator 10 with an interlock circuit. Figure 2 , Figure 2 The functional module diagram of an embodiment of the radiation protection circuit is shown in FIG. 1 . The high-voltage generator 10 includes two interlocking circuits, namely, a first interlocking circuit and a second interlocking circuit. The multiple switches include a travel switch, an electromagnetic lock switch, a key switch and an emergency stop switch. The travel switch is arranged in series on the first interlocking circuit, and the electromagnetic lock switch, the key switch and the emergency stop switch are arranged in series on the second interlocking circuit. When the travel switch, the electromagnetic lock switch, the key switch and the emergency stop switch are all closed, the irradiation equipment is in a closed state, the first interlocking circuit and the second interlocking circuit are turned on, and the high-voltage generator 10 can only work when it detects that the first interlocking circuit and the second interlocking circuit are both turned on. At this time, the high-voltage generator 10 can convert the power supply 20 into a high-voltage power supply and output it to the radiation source 30. The feedback ends of the multiple switches are also connected to the control unit. When the switches are closed, the corresponding switch feedback signals are output to the control unit. When all the switches are closed and the switch feedback signals are sent to the control unit, the control unit allows the issuance of open source instructions, that is, after all the switches are closed so that the irradiation equipment is in a closed state, the radiation source 30 can emit radiation based on the control of the control unit. With such arrangement, the control unit can control the radiation source 30 to operate only when all switches are closed so that the irradiation device is in a closed state, thereby improving the safety of the irradiation device.

[0089] In order to better illustrate the inventive concept of the utility model, this embodiment takes the Xray radiation protection circuit of non-destructive testing equipment with a high-voltage generator with an interlocking circuit, and the high-voltage generator 10 is provided with two interlocking circuits as an example for explanation. In this embodiment, it includes a high-voltage generator, a radiation source, a power supply, a travel switch, a relay, an electromagnetic lock, an emergency stop, a key switch, a control unit, and an equipment lead room.

[0090] When the irradiation equipment is working, the first step is to supply power to both ends of the high voltage generator, usually DC 24V;

[0091] The second step is, Figure 3 As shown, connect one end of the normally open end of the travel switch to the power supply end (depending on whether the control end is PNP input or NPN input, the connected power supply end is high level or low level), and the other end is connected to the IN signal of the control unit and the relay power supply end (non-common end) on the interlocking circuit. When the travel switch is closed, the control unit obtains the level signal, and relay A can be powered on and closed;

[0092] In a possible implementation of the present application, the number of travel switches can be increased by connecting normally open ends of travel switches in series according to actual conditions, for example Figure 4Relay contacts corresponding to two travel switches are arranged in series on one interlocking line of the medium and high voltage generator;

[0093] The third step is Figure 4 As shown, the normally open contact of the above relay A is connected to one of the interlocking circuits, so that when the travel switch is closed, the control unit obtains the closing signal and can supply power to the relay at the same time, so that the relay is attracted and the interlocking circuit can be turned on;

[0094] The fourth step is Figure 3 As shown, connect one end of the emergency stop switch to the power supply end (depending on whether the control end is PNP input or NPN input, the connected power supply end is high level or low level), and the other end is connected to the IN signal of the control unit and the relay power supply end (non-common end) on the interlocking circuit. When the travel switch is closed, the control unit receives the level signal, and relay B can be powered on and closed;

[0095] Step 5: Figure 3 As shown, connect one end of the key switch to the power supply end (depending on whether the control end is PNP input or NPN input, the connected power supply end is high level or low level), and the other end is connected to the IN signal of the control unit and the relay power supply end (non-common end) on the interlocking circuit. When the travel switch is closed, the control unit obtains the level signal, and the relay C can be powered on and closed;

[0096] Step 6: Figure 3 As shown, one end of the electromagnetic lock switch is connected to the power supply end (depending on whether the control end is PNP input or NPN input, the connected power supply end is high level or low level), and the other end is connected to the IN signal of the control unit and the relay power supply end (non-common end) on the interlocking circuit. When the travel switch is closed, the control unit obtains the level signal, and the relay D can be powered on and closed;

[0097] Step 7: Figure 4 As shown, the normally open contacts of relay B, relay C and relay D are connected in series to the interlocking circuit at the other end. In this way, only when the emergency stop switch, key switch and electromagnetic lock switch are closed at the same time, the control unit receives the closing signal, and relays BCD can simultaneously close the normally open contacts and the interlocking circuit is turned on.

[0098] In a possible implementation of the present application, a restriction may be added to the control unit, and only after receiving the switch feedback signal output by the four switches, can an open source instruction be issued to control the ray source to start working;

[0099] In a possible implementation of the present application, the travel switch is generally installed on the rear door of the equipment that is not often opened, the electromagnetic lock is installed on the front door that is often opened, and the emergency stop switch and the key switch are installed in a position that is convenient for the operator to access;

[0100] In a possible implementation of the present application, both ends of the internal relay of the electromagnetic lock can be connected to the signal of controlling the opening of the radiation source, so that the electromagnetic lock can be controlled to be attracted while the radiation source is turned on. The resistance after attraction can prevent the operator from accidentally opening the front door when the source is open. At the same time, the key switch can be turned on when the device is not in use, and the key can be pulled out, so that the source cannot be opened when non-staff operate the device.

[0101] In one embodiment, the irradiation device further comprises:

[0102] A lead room, wherein the lead room is provided with a containing cavity and at least one equipment door;

[0103] The ray source 30 is disposed in the accommodating cavity;

[0104] At least one switch in the radiation protection circuit is disposed on the device door.

[0105] In one embodiment, the equipment door includes a normally open door and a normally closed door;

[0106] The switches in the radiation protection circuit include an electromagnetic lock switch and a travel switch; wherein,

[0107] The electromagnetic lock switch is arranged on the normally open door;

[0108] The travel switch is arranged on the normally closed door.

[0109] In this embodiment, the irradiation equipment further includes a lead room, which is provided with an equipment door, and the radiation source 30 is arranged in the accommodation cavity of the lead room. When the equipment door is closed, the lead room can block the radiation emitted by the radiation source 30 from radiating outward. It can be understood that some lead rooms will be provided with multiple equipment doors, so a travel switch can be set on each equipment door, so that the staff can control the corresponding switch to close when closing the equipment door, and the radiation source 30 needs to be allowed to work only when all switches are closed. In this way, it can be ensured that the radiation source 30 can only work when all switch doors are closed, and the safety problems caused by the equipment door not being closed can be avoided. Further, the multiple equipment doors can be divided into commonly used normally open doors and uncommonly used normally closed doors. Correspondingly, an electromagnetic lock switch can be set on the commonly used normally open door, and a travel switch can be set on the uncommonly used normally closed door. When the radiation source 30 is working, the electromagnetic lock is controlled to be sucked in, and the suction force of the electromagnetic lock can ensure that the equipment door will not be opened by the staff, thereby avoiding the safety problems caused by the staff accidentally opening the commonly used equipment door in the case of open source.

[0110] The above description is only a preferred embodiment of the present invention, and does not limit the protection scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the protection scope of the present invention.

Claims

1. A radiation protection circuit, used in an irradiation device, wherein the irradiation device includes a high voltage generator, characterized in that: The radiation protection circuit comprises: A plurality of switches, wherein the plurality of switches are electrically connected to the high-voltage generator, and when the plurality of switches are all closed, the high-voltage generator is triggered to operate; The irradiation equipment further includes a ray source, which is electrically connected to the high voltage generator; The radiation protection circuit further includes: a control unit, wherein a control end of the control unit is connected to the ray source, and the control unit is also connected to a feedback end of each of the switches; The switch is further configured to output a switch feedback signal to the control unit when closed, so that the control unit controls the ray source to emit rays when receiving the switch feedback signals output by a plurality of switches.

2. The radiation protection circuit according to claim 1, wherein: The irradiation equipment also includes a power supply; A plurality of the switches are arranged in series between the power supply end of the high-voltage generator and the output end of the power supply. When the plurality of switches are closed, the power supply is controlled to be electrically connected to the high-voltage generator so that the power supply supplies power to the high-voltage generator.

3. The radiation protection circuit according to claim 1, wherein: The high voltage generator includes at least one interlock circuit; A plurality of the switches are arranged in series on the interlock circuit; when the plurality of switches are closed, the interlock circuit is controlled to be turned on to trigger the high-voltage generator to work, so that the high-voltage generator provides high voltage for the radiation source.

4. The radiation protection circuit according to claim 3, wherein: There are two interlocking circuits, and the two interlocking circuits are respectively a first interlocking circuit and a second interlocking circuit; The plurality of switches are divided into a first switch group and a second switch group; The first switch group is arranged in series on the first interlock circuit; The second switch group is arranged in series on the second interlock circuit; When the first switch group and the second switch group control the first interlock circuit and the second interlock circuit to be turned on, the high voltage generator is triggered to operate, so that the high voltage generator provides high voltage for the radiation source.

5. The radiation protection circuit according to claim 3, wherein: Each of the switches includes a trigger body and a relay. The trigger body and the coil of the relay are arranged in series, and the contacts of the relay are arranged in series on the interlock circuit. When the trigger body is closed, the contacts of the relay are controlled to close, so as to control the conduction of the interlock circuit.

6. The radiation protection circuit according to claim 1, wherein: At least one of the plurality of switches is an electromagnetic lock switch; The control unit is also connected to the controlled end of the electromagnetic lock switch, and is further configured to control the electromagnetic lock switch to be closed when receiving a signal indicating that the radiation source is operating.

7. An irradiation device, characterized in that: include: Power supply; Radiation source; a high-voltage generator, the high-voltage generator being electrically connected to the ray source and the power supply, respectively, and configured to convert the power supply into high-voltage power and then output it to the ray source to power the ray source; as well as, The radiation protection circuit according to any one of claims 1 to 6, wherein the radiation protection circuit is electrically connected to the high voltage generator.

8. The irradiation device according to claim 7, characterized in that The radiation protection circuit is arranged in series between the power supply end of the high-voltage generator and the output end of the power supply; when the radiation protection circuit is turned on, it is used to control the high-voltage generator to be electrically connected to the power supply so that the power supply supplies power to the high-voltage generator.

9. The irradiation device according to claim 7, characterized in that The power supply end of the high voltage generator is connected to the output end of the power supply; The high voltage generator includes at least one interlock circuit; The radiation protection circuit is arranged in series on the interlock circuit; when the radiation protection circuit is turned on, it controls the interlock circuit to be turned on, so as to trigger the high-voltage generator to start working and convert the power supply into high-voltage power and then output it to the radiation source.

10. The irradiation equipment according to claim 7, characterized in that The irradiation equipment further comprises: A lead room, the lead room being provided with a containing cavity and at least one equipment door; The ray source is disposed in the accommodating cavity; The switch in the radiation protection circuit is arranged on the device door.

11. The irradiation device according to claim 10, wherein The equipment door includes a normally open door and a normally closed door; The switches in the radiation protection circuit include an electromagnetic lock switch and a travel switch; wherein, The electromagnetic lock switch is arranged on the normally open door; The travel switch is arranged on the normally closed door.

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