Radiation monitoring device

Abstract

The invention belongs to the field of safety monitoring, and discloses a radiation monitoring device. The radiation monitoring device is composed of a base, a shielding mechanism and a detector, the shielding mechanism is provided with at least two shielding parts, the shielding mechanism has a first state in which a shielding space is defined by the shielding parts and a second state in which the shielding parts are separated from each other, and the shielding parts are arranged on the base in a sliding or rolling mode. The shielding mechanism can be switched between the first state and the second state, the time consumed for removing and building the shielding mechanism is shortened, the number of personnel and the operation time are reduced, and the technical problem that in the prior art, the lead shielding layer of the radiation monitoring device is complex in disassembly and assembly processes is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of safety monitoring, and in particular to a radiation monitoring device. Background Art

[0002] Nuclear power plants will have radioactive liquid substances throughout their entire operating cycle. Radioactive liquid substances that are no longer in use need to be discharged to the outside through discharge pipes. These radioactive liquid substances discharged to the outside are collectively referred to as radioactive liquid effluents, such as nuclear waste water. Radioactive liquid effluents need to be monitored for radiation before they are discharged to the outside. Currently, radiation monitoring of radioactive liquid effluents is mostly online monitoring, that is, detectors are set on the discharge pipeline to directly collect and evaluate the radiation conditions of the radioactive liquid effluents in the discharge pipeline.

[0003] In order to improve the accuracy of online radiation monitoring, it is necessary to shield the radiation interference from the outside world. In the prior art, a lead shielding layer is generally set around the detector and the discharge pipe. During the radiation monitoring process, some radioactive substances contained in the radioactive liquid effluent will contaminate the surface of the discharge pipe and form enrichment over time, thereby affecting the accuracy of online radiation monitoring. Therefore, the discharge pipe needs to be dismantled for maintenance or cleaning at regular intervals. The dismantling process of the discharge pipe requires the removal of the lead shielding layer around it.

[0004] However, in the existing technical solutions and equipment, the lead shielding layer is composed of multiple lead blocks of different sizes arranged around the discharge pipe. Since the lead blocks themselves are heavy and there are a large number of lead blocks in the lead shielding layer, the disassembly and installation process of the lead shielding layer is relatively complicated. Summary of the invention

[0005] The object of the present invention is to provide a radiation monitoring device to solve the technical problem of complicated disassembly and installation process of the lead shielding layer of the radiation monitoring device in the prior art.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Radiation monitoring device, used for radiation monitoring of the discharge pipeline, including:

[0008] Base;

[0009] A shielding mechanism, comprising at least two shielding parts, wherein the shielding mechanism has a first state in which the shielding parts enclose a shielding space and a second state in which the shielding parts are separated from each other, wherein the shielding space is used to shield the radiation interference of the outside world to the discharge pipe, and the shielding parts are all slidably or rollingly arranged on the base, so that the shielding mechanism switches between the first state and the second state;

[0010] The detector is arranged on the shielding mechanism. When the shielding mechanism is in the first state, at least the probe head of the detector is located in the shielding space.

[0011] In one embodiment, the shielding portion includes a shell and a filling block, and the filling block is filled in the shell.

[0012] In one embodiment, the shell is provided with a plurality of through holes, and the through holes are used to observe whether the position of the filling block is offset.

[0013] In one embodiment, one of the shielding parts is provided with a detector channel, and the detector is inserted into the detector channel and connected to the shielding part.

[0014] In one embodiment, a portion of the detector exposed outside the shielding space is covered with a shielding layer.

[0015] In one embodiment, two shielding parts are provided, and the two shielding parts are respectively a first shielding part and a second shielding part. The first shielding part is a U-shaped groove structure, and the second shielding part is used to block the notch of the first shielding part.

[0016] In one embodiment, the shielding mechanism further includes a locking member, and when the shielding mechanism is in the first state, adjacent shielding parts are locked and fixed by the locking member.

[0017] In one embodiment, the base further includes a driving mechanism, the driving mechanism is disposed on the base, the shielding portion is disposed at an output end of the driving mechanism, and the driving mechanism is configured to drive the shielding portion to slide or roll on the base.

[0018] In one embodiment, the driving mechanism includes a handwheel, a screw rod and a movable seat, the screw rod is rotatably connected to the base, the handwheel is fixed to one end of the screw rod, a nut is threadedly connected to the screw rod, the movable seat is fixed to the nut, and the shielding part is fixed to the movable seat.

[0019] In one embodiment, the driving mechanism further comprises a guide rail, the guide rail is fixedly connected to the base, and the movable seat is slidably connected or rollingly connected to the guide rail.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a radiation monitoring device, which consists of a base, a shielding mechanism and a detector. The shielding mechanism is arranged as at least two shielding parts, the shielding parts have a first state of enclosing a shielding space and a second state of being separated from each other, and the shielding parts are all slidably or rollingly arranged on the base. By applying external force to the shielding parts, the shielding mechanism can be switched between the first state and the second state, which shortens the time consumed in removing and building the shielding mechanism, reduces the number of personnel and the working time, and solves the problem of complicated disassembly and installation process of the lead shielding layer of the radiation monitoring device in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the radiation monitoring device in a first state according to an embodiment of the present invention;

[0023] Figure 2 is a schematic structural diagram of a first shielding portion according to an embodiment of the present invention;

[0024] Figure 3 is a schematic structural diagram of the radiation monitoring device according to an embodiment of the present invention in a second state;

[0025] Figure 4 It is a schematic diagram of the structure of the driving mechanism described in an embodiment of the present invention.

[0026] In the figure:

[0027] 1. Base; 11. Driving mechanism; 111. Hand wheel; 112. Screw rod; 113. Guide rail; 114. Moving seat; 2. Shielding mechanism; 21. Shielding part; 211. Shell; 2111. Through hole; 212. Filling block; 213. Detector channel; 22. Locking piece; 3. Detector; 31. Shielding layer; 4. Discharge pipe. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0032] like Figure 1-Figure 4 As shown, the present invention proposes a radiation monitoring device, including a base 1, a shielding mechanism 2 and a detector 3, wherein the shielding mechanism 2 includes at least two shielding parts 21, and the shielding parts 21 are connected to the base 1 by sliding or rolling to achieve enclosure and separation between the shielding parts 21. When the shielding parts 21 form a shielding space around the discharge pipe 4, the shielding mechanism 2 is in a first state, and when the shielding parts 21 are separated from each other, the shielding mechanism 2 is in a second state. The detector 3 is arranged on the shielding mechanism 2, and when the shielding mechanism 2 is in the first state, at least the probe of the detector 3 is located in the shielding space, so that the probe part of the detector 3 can collect and evaluate the radioactivity of the liquid in the discharge pipe 4 located in the shielding space.

[0033] When the shielding mechanism 2 is in the first state, the shielding space enclosed by the shielding part 21 surrounds the discharge pipe 4 therein, which is used to shield the radiation interference of the outside world on the circumference of the discharge pipe 4 and improve the accuracy of online monitoring; when the shielding mechanism 2 is in the second state, there is enough space between the shielding parts 21, and the staff can remove the discharge pipe 4 for maintenance or cleaning. The shielding mechanism 2 realizes the switching between the first state and the second state by sliding or rolling the shielding part 21. Compared with the prior art, when repairing or cleaning the discharge pipe, it is necessary to remove the heavy lead shielding layer layer by layer, and after the discharge pipe is repaired or cleaned and installed, the lead shielding layer is installed layer by layer around the discharge pipe. The radiation monitoring device of this embodiment is more convenient and labor-saving, shortens the time consumed in removing and setting up the shielding mechanism 2, and reduces the number of staff and working time.

[0034] Furthermore, if Figure 2 and Figure 3As shown, the shielding part 21 includes a shell 211 and a filling block 212. The filling block 212 is filled in the shell 211. In this embodiment, the filling block 212 is a rectangular lead block. In other embodiments, the filling block 212 can be in other shapes, such as a regular hexagonal prism or a rhombus. The filling block 212 can also be made of other materials with shielding effects, such as cement, steel plate or nano-composite shielding materials, etc., to ensure that the filling block 212 has a shielding effect on the external radiation. After the filling block 212 is filled into the shell 211, the shielding part 21 can enclose the discharge pipe 4 in the circumferential direction to form a closed shielding space. In the axial direction of the discharge pipe 4, the shielding space is as close to the discharge pipe 4 as possible. Specifically, the shell 211 also uses a material that has a shielding effect on the external radiation. In this embodiment, the material of the shell 211 is a steel plate. The shell 211 can protect the internal filling block 212 to prevent the filling block 212 from deforming during the sliding process of the shielding part 21, thereby affecting the shielding effect. The housing 211 is also provided with a plurality of through holes 2111 for observing whether the position of the filling block 212 inside is shifted, so as to avoid the shift of the position of the filling block 212 affecting the shielding effect.

[0035] In one embodiment, if Figure 1 and Figure 2 As shown, a detector channel 213 is provided on one of the shielding parts 21 for installing the detector 3. Specifically, the detector channel 213 is provided on one side of the shielding part 21, and the detector channel 213 passes through the filling block 212 and the shell 211. At least the probe head of the detector 3 extends into the shielding space formed by the shielding part 21 through the detector channel 213, and a part of it is exposed outside the shielding space, which is convenient for the disassembly and installation of the detector 3. This part of the detector 3 is coated with a shielding layer 31 to shield the external radiation interference to the detector 3 and improve the accuracy of online monitoring. Correspondingly, the diameter of the detector channel provided on the outside of the shell 211 is larger than the diameter of the detector channel provided by the filling block 212, so that the shielding layer 31 covering the detector 3 abuts against the filling block 212, thereby enhancing the shielding effect of the shielding layer 31 on external radiation and preventing external radiation from interfering with the collection and evaluation results of the detector 3. As shown Figure 1 As shown, in this embodiment, the shielding layer 31 is a cylindrical lead shielding layer adapted to the shape of the detector 3, and a bracket is also provided outside the shielding layer 31 for supporting the detector 3 and the shielding layer 31. In other embodiments, the material of the shielding layer 31 can also be other materials with shielding effects, such as cement, steel plate or nano-composite shielding material, etc., and the shape of the shielding layer 31 can also be set to a rectangular cylindrical structure, which will not be described in detail here.

[0036] Preferably, if Figure 3As shown, there are two shielding parts 21, namely, a first shielding part and a second shielding part which are arranged opposite to each other, wherein the first shielding part is a U-shaped groove structure, and when the shielding mechanism 2 is in the first state, the second shielding part is used to block the notch of the first shielding part. The shielding parts 21 are arranged in two, which makes it more convenient for the shielding mechanism 2 to switch between the first state and the second state, and reduces the complexity of the operation. Furthermore, an L-shaped step structure is also arranged on the first shielding part and the second shielding part, and when the shielding mechanism 2 is in the first state, the L-shaped step structures on the first shielding part and the second shielding part are engaged with each other to enhance the shielding effect of the shielding mechanism 2. When the number of shielding parts 21 is three, four or other numbers, when the shielding mechanism 2 is in the first state, each shielding part 21 is also engaged with each other, and will not be described in detail here.

[0037] For example, Figure 3 As shown, the shielding mechanism 2 further includes a locking member 22. When the shielding mechanism 2 is in the first state, adjacent shielding parts 21 can be locked by the locking member 22, so that the connection between the shielding parts 21 is tighter, thereby improving the shielding effect of the shielding mechanism 2. Specifically, the locking member 22 can be a bolt, and correspondingly, a connecting plate with a bolt hole is provided on the housing 211. When the shielding mechanism 2 is in the first state, adjacent shielding parts 21 are locked by the bolt. The locking member 22 can also be set in other forms, such as a buckle, which will not be described in detail here.

[0038] For example, Figure 3 and Figure 4As shown, the radiation monitoring device further includes a driving mechanism 11. In this embodiment, the driving mechanism 11 is a screw mechanism, including a handwheel 111, a screw 112 and a moving seat 114. The screw 112 is connected to the base 1 through a support unit, wherein the support unit is fixed on the base 1, the screw 112 and the support unit are rotatably connected, and the handwheel 111 is fixed to one end of the screw 112 for rotating the screw 112. A nut is threadedly connected to the screw 112, and the moving seat 114 is fixed on the nut. Rotating the handwheel 111 drives the screw 112 to rotate and then drives the moving seat 114 to slide. The shielding part 21 is fixedly connected to the moving seat 114. Specifically, a bolt hole is provided on the shell of the shielding part 21, and correspondingly, a bolt hole is also provided on the moving seat 114. The shielding part 21 is fixedly connected to the moving seat 114 by bolts and slides synchronously with the moving seat 114, so as to realize the enclosure and mutual separation between the shielding parts 21. The bracket for supporting the detector 3 is also fixed to the moving seat 114 by bolts, and slides synchronously with the moving seat 114. More specifically, the driving mechanism 11 also includes a guide rail 113, which is fixedly connected to the base 1, and the moving seat 114 is slidingly or rollingly arranged on the guide rail 113. When the moving seat 114 is slidably connected to the guide rail 113, one of the moving seat 114 and the guide rail 113 is provided with a slide groove, and the other is provided with a slider matched with the slide groove. When the moving seat 114 is rollingly connected to the guide rail 113, a roller is provided at the bottom of the moving seat 114, and the guide rail 113 is provided with a groove for the roller to roll, so as to ensure that the moving seat 114 rolls on the guide rail 113. The moving seat 114 slides or rolls on the guide rail 113 driven by the screw rod 112, thereby driving the shielding part 21 to slide or roll on the guide rail 113. The arrangement of the driving mechanism 11 makes the enclosure and separation between the shielding parts 21 more convenient and labor-saving, and can accurately control the moving position of the shielding parts 21. The number of driving mechanisms 11 is consistent with the number of shielding parts 21, and the arrangement of the guide rails 113 can be adjusted as the number of shielding parts 21 changes. The hand wheel 111 can be manually rotated to drive the moving seat 114 to slide or roll on the guide rail 113, or an electric wrench can be externally connected to one end of the hand wheel 111 to increase the speed of enclosure and separation of the shielding parts 21. In other embodiments, the driving mechanism 11 can also take other forms, such as belt drive, gear rack drive, pneumatic drive or hydraulic drive.

[0039] In one embodiment, without setting the driving mechanism 11, the shielding mechanism 2 is directly rolled on the base 1. Specifically, a roller is set at the bottom of the shielding part 21, and the shielding part 21 is enclosed and separated by rolling the roller. The setting of the roller makes the movement of the shielding part 21 more convenient and labor-saving, and the disassembly and installation process of the shielding mechanism 2 is more convenient.

[0040] When the discharge pipe 4 needs to be disassembled, repaired or cleaned, an external force is applied to the shielding part 21 of the radiation monitoring device to separate the shielding parts 21 from each other, and the shielding mechanism 2 is switched from the first state to the second state, and the discharge pipe 4 is disassembled. When the repair or cleaning is completed, the discharge pipe 4 is installed back to the original position, and an external force is applied to the shielding part 21 again, so that the shielding part 21 forms a shielding space around the discharge pipe 4, and the shielding mechanism 2 is switched from the second state to the first state.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A radiation monitoring device for performing radiation monitoring on a discharge pipe (4), characterized in that: include: Base (1); A shielding mechanism (2) comprising at least two shielding parts (21), the shielding mechanism (2) having a first state in which the shielding parts (21) enclose a shielding space and a second state in which the shielding parts (21) are separated from each other, the shielding space being used to shield radiation interference from the outside to the discharge pipe (4), the shielding parts (21) being slidably or rollingly arranged on the base (1) so that the shielding mechanism (2) can be switched between the first state and the second state; The detector (3) is arranged on the shielding mechanism (2); when the shielding mechanism (2) is in the first state, at least the probe head of the detector (3) is located in the shielding space.

2. The radiation monitoring device according to claim 1, characterized in that: The shielding part (21) comprises a shell (211) and a filling block (212), wherein the filling block (212) is filled in the shell (211).

3. The radiation monitoring device according to claim 2, characterized in that: The housing (211) is provided with a plurality of through holes (2111), and the through holes (2111) are used to observe whether the position of the filling block (212) is offset.

4. The radiation monitoring device according to claim 1, characterized in that: One of the shielding parts (21) is provided with a detector channel (213), and the detector (3) is inserted into the detector channel (213) and connected to the shielding part (21).

5. The radiation monitoring device according to claim 4, characterized in that: The portion of the detector (3) exposed outside the shielding space is covered with a shielding layer (31).

6. The radiation monitoring device according to any one of claims 1 to 5, characterized in that: Two shielding parts (21) are provided, and the two shielding parts (21) are respectively a first shielding part and a second shielding part which are arranged opposite to each other, the first shielding part is a U-shaped groove structure, and when the shielding mechanism (2) is in the first state, the second shielding part can block the notch of the first shielding part.

7. The radiation monitoring device according to any one of claims 1 to 5, characterized in that: The shielding mechanism (2) further comprises a locking member (22); when the shielding mechanism (2) is in the first state, adjacent shielding portions (21) are locked and fixed by means of the locking member (22).

8. The radiation monitoring device according to any one of claims 1 to 5, characterized in that: The radiation monitoring device further comprises a driving mechanism (11), wherein the driving mechanism (11) is arranged on the base (1), the shielding portion (21) is arranged at an output end of the driving mechanism (11), and the driving mechanism (11) is configured to drive the shielding portion (21) to slide or roll on the base (1).

9. The radiation monitoring device according to claim 8, characterized in that: The driving mechanism (11) comprises a hand wheel (111), a screw rod (112) and a movable seat (114); the screw rod (112) is rotatably connected to the base (1); the hand wheel (111) is fixed to one end of the screw rod (112); a nut is threadedly connected to the screw rod (112); the movable seat (114) is fixed to the nut; and the shielding portion (21) is fixed to the movable seat (114).

10. The radiation monitoring device according to claim 9, characterized in that: The driving mechanism (11) further comprises a guide rail (113), wherein the guide rail (113) is fixedly connected to the base (1), and the movable seat (114) is slidably connected or rollingly connected to the guide rail (113).

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