Plunger, reaction device and nuclear reactor

Abstract

The present application relates to the technical field of nuclear reactors, and provides a plunger, a reaction device and a nuclear reactor. The plunger is used for connecting a mounting plate and a rod, the mounting plate is provided with a threaded hole, and the plunger comprises a first threaded section used for being connected with the threaded hole and a connecting section used for being connected with the rod; the plunger is provided with a flow channel hole and a communication hole, the flow channel hole penetrates through one end of the plunger provided with the first threaded section and extends to the connecting section, the flow channel hole is used for being communicated with a space on the side of the mounting plate away from the connecting section, and the communication hole is arranged on the side wall of the plunger and is communicated with the flow channel hole, and the communication hole is used for being communicated with a space on the side of the mounting plate close to the connecting section. Heat exchange medium can pass through the mounting plate through the flow channel hole and the communication hole on the plunger, so that a hole does not need to be opened on the mounting plate for the heat exchange medium to flow, and then the rod can be installed at the position where the hole is originally needed to be opened, the number of the rods to be installed is increased, and the heating effect of the reaction device is improved.

Description

Technical Field

[0001] This invention relates to the field of nuclear reactor technology, and more particularly to a plunger, a reaction device, and a nuclear reactor. Background Technology

[0002] In existing technologies, both nuclear reactor reactor apparatuses and reactor apparatuses used for simulating nuclear reactor reactions typically include rods and mounting plates. The difference lies in the type of rods used: in nuclear reactor reactor apparatuses, the rods are fuel rods; while in reactor apparatuses used for simulating nuclear reactions, the rods are electrically heated rods.

[0003] The device comprises a pair of mounting plates spaced apart, forming a reaction space capable of accommodating the rods. Each end of the rod is connected to one of the mounting plates. Each mounting plate has an inlet for the heat exchange medium and an outlet for its discharge. During operation, the heat exchange medium enters the reaction space through the inlet, flows through the gap between the rods, exchanges heat with the outer walls of the rods, and finally exits through the outlet.

[0004] Since the rods are mounted on the mounting plate, the size of the mounting plate determines the size of the reaction space and the number of rods that can be installed. Given a fixed mounting plate size, the inlet and outlet holes on the mounting plate will inevitably encroach on the mounting space for the rods, resulting in a reduction in the number of rods within the reaction space and thus decreasing the heating efficiency of the reaction apparatus. Summary of the Invention

[0005] This invention provides a plunger, a reaction device, and a nuclear reactor to solve the defect in the prior art where the openings on the mounting plate of the reaction device occupy the installation space of the rods, resulting in a reduction in the number of rods in the reaction space, thereby achieving the effect of increasing the number of rods in the reaction space.

[0006] The present invention provides a plunger for connecting a mounting plate and a rod, wherein the mounting plate is provided with a threaded through hole, and the plunger includes a first threaded section for connecting with the threaded through hole and a connecting section for connecting with the rod.

[0007] The plunger is provided with a flow channel hole and a connecting hole. The flow channel hole passes through one end of the plunger where the first threaded section is provided and extends to the connecting section. The flow channel hole is used to communicate with the space on the side of the mounting plate away from the connecting section. The connecting hole is provided on the side wall of the plunger and communicates with the flow channel hole. The connecting hole is used to communicate with the space on the side of the mounting plate near the connecting section.

[0008] According to a plunger provided by the present invention, the plunger further includes an end head connected to the end of the first threaded segment away from the connecting segment, the flow channel hole penetrating the end head, the cross-sectional area of ​​the end head being larger than the cross-sectional area of ​​the first threaded segment, and the end head being used to abut against the side of the mounting plate away from the connecting segment.

[0009] According to a plunger provided by the present invention, the inner wall of the flow channel hole near the end of the end is provided with a polygonal hole;

[0010] And / or, the outer sidewall of the end is provided with at least one pair of mutually parallel planes.

[0011] According to a plunger provided by the present invention, the plunger further includes a collar disposed between the connecting section and the first threaded section, one end of the collar being used to abut against the mounting plate, and the other end of the collar being used to abut against the rod.

[0012] According to a plunger provided by the present invention, a polygonal hole is provided at the end of the connecting section away from the first threaded section;

[0013] And / or, the outer sidewall of the collar is provided with at least one pair of mutually parallel planes.

[0014] According to a plunger provided by the present invention, the connecting section is a smooth rod section, which is used to extend into the smooth hole of the rod.

[0015] According to a plunger provided by the present invention, the connecting section is a second threaded section for connecting with the threaded inner hole of the rod.

[0016] According to a plunger provided by the present invention, the communicating hole is an elongated hole extending along the length direction of the plunger;

[0017] And / or, the number of the connecting holes is multiple, and the multiple connecting holes are distributed circumferentially along the plunger.

[0018] The present invention also provides a reaction apparatus, including a mounting plate, a rod and a plunger as described above, wherein the rod is connected to the mounting plate via the plunger.

[0019] According to a reaction apparatus provided by the present invention, the rod is a fuel rod or an electric heating rod.

[0020] According to a reaction apparatus provided by the present invention, a detection device is further included. The detection device is connected to the electric heating rod and is used to detect the parameter information of the electric heating rod. The flow channel hole of the plunger is provided through the flow channel hole. The detection device is disposed at one end of the flow channel hole near the connecting section. The cable of the detection device is led out from the flow channel hole.

[0021] The present invention also provides a nuclear reactor, comprising the reaction apparatus described above.

[0022] The plunger provided by this invention connects to a mounting plate via a first threaded section and to a rod via a connecting section, thereby completing the connection between the rod and the mounting plate. Simultaneously, the end of the first threaded section of the plunger away from the connecting section has a flow channel hole, which extends towards the connecting section and communicates with the space on the side of the mounting plate away from the connecting section. The plunger also has a connecting hole for connecting the flow channel hole and the space on the side of the mounting plate near the connecting section, thus allowing the heat exchange medium to pass through the flow channel hole and the connecting hole on the plunger and pass through the mounting plate.

[0023] With this configuration, the heat exchange medium can pass through the flow channel holes and connecting holes on the plunger through the mounting plate, thus eliminating the need to make holes in the mounting plate for the heat exchange medium to flow through. This allows the rods to be installed in the locations where holes would have been previously required, increasing the number of rods that can be installed and improving the heating effect of the reaction device. This solves the problem in the prior art where making holes in the mounting plate occupies the space for the rods and reduces the number of rods that can be installed.

[0024] Furthermore, since there is no need to create openings in the mounting plate for the heat exchange medium to flow through, the number of openings in the mounting plate is reduced, thus improving the structural strength of the mounting plate. In addition, the elimination of openings allows for a smaller volume of the mounting plate, resulting in a more compact structure for the reaction device.

[0025] Meanwhile, since the first threaded section of the plunger is threadedly connected to the threaded through hole of the mounting plate, by screwing the plunger, as the plunger moves axially along the threaded through hole, at least a portion of the orifice of the connecting hole can enter the threaded through hole. That is, the wall of the threaded through hole can cover part of the orifice of the connecting hole, thereby reducing the flow cross-section of the heat exchange medium's flow channel and thus achieving the effect of adjusting the flow rate of the heat exchange medium.

[0026] Furthermore, in existing reaction devices, the distance between each rod and the opening within the reaction space varies. Rods closer to the opening have better heat dissipation, while those farther away have relatively poor heat dissipation. This prevents the full utilization of the heating capacity of each rod, limiting the heating rate and effect of the reaction device. However, by using the plunger connection between the rods and the mounting plate in this invention, the problem of varying distances between the rods and the opening is eliminated. Each plunger corresponding to a rod can be used for heat exchange medium flow, ensuring that heat exchange medium flows over the outer surface of each rod. In this way, the heat exchange medium can exchange heat with each rod, thereby fully utilizing the heating capacity of each rod and improving the heating rate and effect of the reaction device.

[0027] The reaction apparatus and nuclear reactor provided by the present invention, since they include the plunger of the present invention, also include all the above-mentioned advantages of the plunger. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of the first type of plunger provided in some embodiments of the present invention;

[0030] Figure 2 yes Figure 1 Top view of the plunger shown;

[0031] Figure 3 This is a schematic diagram of the structure of the second type of plunger provided in some embodiments of the present invention;

[0032] Figure 4 yes Figure 3 Top view of the plunger shown;

[0033] Figure 5 These are schematic diagrams of the reaction apparatus provided in some embodiments of the present invention;

[0034] Figure 6 yes Figure 5 A magnified view of section I in the image;

[0035] Figure 7 yes Figure 5 A magnified view of section II in the image;

[0036] Figure 8 This is a schematic diagram of the structure of the first housing provided in some embodiments of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the second housing provided in some embodiments of the present invention;

[0038] Figure 10 These are schematic diagrams of the flow collector provided in some embodiments of the present invention;

[0039] Figure 11 yes Figure 5 A magnified view of section III in the image.

[0040] Figure label:

[0041] 1. Plunger; 101. First threaded section; 102. Connecting section; 103. Flow channel hole; 104. Connecting hole; 105. End; 106. Polygonal hole; 107. Collar;

[0042] 2. Mounting plate; 201. Threaded through hole;

[0043] 3. Bar stock; 301, plain hole; 302, threaded inner hole;

[0044] 4. Outer shell; 401. First shell; 4011. Cylinder; 4012. End cap; 402. Second shell; 4021. First annular structure; 4022. Second annular structure; 403. First through port; 404. Second through port; 405. Wiring port;

[0045] 5. Manifold; 501. Flange; 6. Insulation layer; 7. Sealing element; 8. Sleeve; 9. Nut; 10. Gasket. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0047] Existing reaction apparatuses typically include rods and mounting plates. The mounting plates are arranged in pairs, with a gap between them. The space between the two mounting plates forms a reaction space capable of accommodating the rods, with each end of the rod connected to one of the mounting plates. Each pair of mounting plates has an inlet for the heat exchange medium to enter and an outlet for the heat exchange medium to exit. During operation, the heat exchange medium enters the reaction space through the inlet, flows through the gap between the rods, exchanges heat with the outer walls of the rods, and finally exits through the outlet. Since the rods are mounted on the mounting plates, the size of the mounting plates determines the size of the reaction space and the number of rods that can be mounted. With a fixed mounting plate size, the inlet and outlet holes inevitably encroach on the mounting space for the rods, reducing the number of rods within the reaction space and decreasing the heating efficiency of the reaction apparatus.

[0048] Therefore, in order to solve the problem that the openings on the mounting plate of the reaction device in the prior art occupy the installation space of the rods, resulting in a reduction in the number of rods in the reaction space, and to achieve the effect of increasing the number of rods that can be installed on the mounting plate without increasing the area of ​​the mounting plate, the present invention provides a plunger, a reaction device and a nuclear reactor.

[0049] The following is combined with Figures 1 to 11 The plunger 1 provided in an embodiment of the present invention is described.

[0050] Specifically, the plunger 1 is used to connect the mounting plate 2 and the rod 3. The rod 3 can be a fuel rod or an electric heating rod. The mounting plate 2 is provided with a threaded through hole 201.

[0051] The plunger 1 includes a first threaded section 101 and a connecting section 102. The first threaded section 101 is used for threaded connection with a threaded through hole 201 on the mounting plate 2. The connecting section 102 is used for connection with the rod 3; for example, the connecting section 102 can be inserted into the rod 3. Optionally, the first threaded section 101 and the connecting section 102 can be configured as an integral structure, or the first threaded section 101 and the connecting section 102 can be machined separately and then installed by threaded connection, welding connection, or adhesive connection.

[0052] refer to Figure 6 and Figure 7 As shown, the plunger 1 is provided with a flow channel hole 103 and a connecting hole 104. The flow channel hole 103 passes through one end of the plunger 1 where the first threaded section 101 is located, and extends towards the connecting section 102. The flow channel hole 103 is used to communicate with the space of the mounting plate 2 away from the connecting section 102. The connecting hole 104 is provided on the side wall of the plunger 1, and communicates with the flow channel hole 103. The connecting hole 104 is used to communicate with the space of the mounting plate 2 near the connecting section 102. That is, the connecting hole 104 and the flow channel hole 103 are respectively used to communicate with both sides of the mounting plate 2, and the connecting hole 104 and the flow channel hole 103 are interconnected. Optionally, if the plunger 1 has a cylindrical structure, the flow channel hole 103 extends along the length direction or axial direction of the plunger 1, while the connecting hole 104 extends radially along the plunger 1.

[0053] The plunger 1 provided by this invention is connected to the mounting plate 2 via a first threaded section 101 and to the rod 3 via a connecting section 102, thereby completing the connection between the rod 3 and the mounting plate 2. Simultaneously, the end of the first threaded section 101 of the plunger 1 away from the connecting section 102 is provided with a flow channel hole 103, which extends towards the connecting section 102 and communicates with the space on the side of the mounting plate 2 away from the connecting section 102. The plunger 1 also has a connecting hole 104 for connecting the flow channel hole 103 and the space on the side of the mounting plate 2 near the connecting section 102, thus allowing the heat exchange medium to pass through the flow channel hole 103 and the connecting hole 104 on the plunger 1 and pass through the mounting plate 2. It should be noted that the heat exchange medium can be a liquid or a gas. The liquid includes, but is not limited to, water. The gas includes, but is not limited to, air and inert gases.

[0054] With this configuration, the heat exchange medium can pass through the flow channel hole 103 and the connecting hole 104 on the plunger 1 through the mounting plate 2, thus eliminating the need to make holes in the mounting plate 2 for the heat exchange medium to flow through. This allows the rods 3 to be installed in the locations where holes would have been previously required, increasing the number of rods 3 installed and improving the heating effect of the reaction device. This solves the problem in the prior art where making holes in the mounting plate 2 occupies the installation space of the rods 3, resulting in a reduction in the number of rods 3 installed. It achieves the effect of increasing the number of rods installed without increasing the area of ​​the mounting plate.

[0055] Meanwhile, since there is no need to make openings in the mounting plate 2 for the heat exchange medium to flow through, the number of openings in the mounting plate 2 is reduced, thus improving the structural strength of the mounting plate 2. In addition, the elimination of openings allows for a reduction in the volume of the mounting plate 2, making the structure of the reaction device more compact.

[0056] Meanwhile, since the first threaded section 101 of the plunger 1 is threadedly connected to the threaded through hole 201 of the mounting plate 2, when the plunger 1 moves axially along the threaded through hole 201 by screwing it in, at least a portion of the orifice of the connecting hole 104 can enter the threaded through hole 201. That is, part of the orifice of the connecting hole 104 is covered by the hole wall of the threaded through hole 201, which reduces the flow cross-section of the heat exchange medium flow channel, thereby enabling the flow rate of the heat exchange medium to be adjusted by screwing in the plunger 1.

[0057] Furthermore, in existing reaction devices, the distance between each rod 3 and the opening within the reaction space varies. Rods 3 closer to the opening have better heat dissipation, while those farther away have relatively poor heat dissipation. This prevents the full utilization of the heating capacity of each rod 3, limiting the heating rate and effect of the reaction device. However, by connecting the rods 3 and the mounting plate 2 with the plunger 1 in this invention, the problem of varying distances between the rods 3 and the opening is eliminated. Each plunger 1 corresponding to each rod 3 allows for the flow of heat exchange medium, ensuring that heat exchange medium flows over the outer surface of each rod 3. In this way, the heat exchange medium can exchange heat with each rod 3, thereby fully utilizing the heating capacity of each rod 3 and improving the heating rate and effect of the reaction device.

[0058] refer to Figure 1 , Figure 6As shown, in some embodiments of the present invention, the plunger 1 further includes an end 105. The end 105 is connected to the end of the first threaded section 101 away from the connecting section 102, i.e., the end 105 is located at the end of the first threaded section 101 away from the connecting section 102. The flow channel hole 103 passes through the end 105. The cross-sectional area of ​​the end 105 is larger than the cross-sectional area of ​​the first threaded section 101; the cross-sectional area referred to here is the area of ​​the cross-section perpendicular to the length direction of the plunger 1. The end 105 is used to abut against the side of the mounting plate 2 away from the connecting section 102. In the process of connecting the mounting plate 2 and the rod 3 using the plunger 1, the connecting section 102 of the plunger 1 is first passed through the threaded through hole 201 of the mounting plate 2, then the connecting section 102 is connected to the rod 3, and then the first threaded section 101 is screwed into the threaded through hole 201 until the end 105 abuts against the mounting plate 2.

[0059] With this configuration, when the plunger 1 is installed in the threaded through hole 201, the end 105 abuts against the mounting plate 2, thereby positioning the plunger 1 and giving it a definite installation position.

[0060] Furthermore, in order to adjust the distance between the end 105 and the mounting plate 2 so that at least a portion of the opening of the connecting hole 104 can enter the threaded through hole 201, a shim can be placed between the end 105 and the mounting plate 2. By increasing or decreasing the number of shims or replacing them with shims of different thicknesses, the distance between the end 105 and the mounting plate 2 can be conveniently and accurately adjusted.

[0061] refer to Figure 1 As shown, in some embodiments provided by the invention, the flow channel hole 103 extends through the connecting section 102. Thus, a detection device can be installed in the end of the flow channel hole 103 near the connecting section 102, allowing the detection device to be close to the interior of the rod 3. The cable of the detection device can be led out through the flow channel hole 103. The detection device includes, but is not limited to, a temperature sensor, such as a thermocouple. Alternatively, when the rod 3 is configured as an electric heating rod, the cable of the electric heating rod can also be led out through the flow channel hole 103. This arrangement eliminates the need for a wire-through hole on the mounting plate 2, thereby avoiding the wire-through hole from encroaching on the mounting space of the rod 3, and also eliminates the need to consider the sealing of the wire-through hole. It is understood that the cable can also be led out sequentially through the connecting hole 104 and the flow channel hole 103, with the same effect.

[0062] In some embodiments provided by the invention, the inner wall of the flow channel hole 103 near the end 105 is provided with a polygonal hole 106. With this configuration, when screwing the plunger 1 onto the mounting plate 2, a wrench can be inserted into the polygonal hole 106 to screw the plunger 1. For example, the polygonal hole 106 is hexagonal, and the wrench can be an Allen wrench.

[0063] In some embodiments of the present invention, the outer wall of the end 105 is provided with at least a pair of parallel planes. By providing at least a pair of parallel planes, when the plunger 1 is screwed onto the mounting plate 2, an open-end wrench or socket wrench can be used to screw the plunger 1 onto the pair of parallel planes. With this configuration, when wiring is required inside the polygonal hole and it is inconvenient to insert an Allen wrench into the polygonal hole, an open-end wrench or socket wrench can be used to screw the plunger 1.

[0064] refer to Figure 2 , Figure 7 As shown, in some embodiments of the present invention, the plunger 1 further includes a collar 107. The collar 107 is disposed between the connecting section 102 and the first threaded section 101. One end of the collar 107 is used to abut against the mounting plate 2, and the other end of the collar 107 is used to abut against the rod 3. This arrangement allows the plunger 1 to be positioned by abutting against the mounting plate 2, thus giving the plunger 1 a defined installation position. Similarly, the rod 3 can be positioned by abutting against the collar 107, thus giving the rod 3 a defined installation position.

[0065] Furthermore, both ends of the rod 3 are connected to the corresponding mounting plate 2 via corresponding plungers 1. Specifically, as shown... Figures 5-7 As shown, the bottom of the bar 3 is connected to the lower mounting plate 2 via a plunger 1 with a collar 107, and the top of the bar 3 is connected to the upper mounting plate 2 via a plunger 1 with an end 105. During installation, the plunger 1 with the collar 107 is first installed on the lower mounting plate 2, then the bar 3 is connected to the plunger 1 with the collar 107, and finally the upper mounting plate 2 and the bar 3 are connected by the plunger 1 with the end 105.

[0066] In some embodiments of the present invention, the end of the plunger 1 with collar 107 that is away from the first threaded section 101 is provided with a polygonal hole 106. With this configuration, when the plunger 1 is screwed onto the mounting plate 2, a wrench can be inserted into the polygonal hole 106 to screw the plunger 1. For example, the polygonal hole 106 is hexagonal, and the wrench can be an internal hex wrench.

[0067] In some embodiments of the present invention, the outer wall of the collar 107 is provided with at least a pair of parallel planes. By providing at least a pair of parallel planes, when the plunger 1 is screwed onto the mounting plate 2, an open-end wrench or socket wrench can be used to screw the plunger 1 onto the pair of parallel planes. With this arrangement, when wiring is required inside the polygonal hole and it is inconvenient to insert an Allen wrench into the polygonal hole, an open-end wrench or socket wrench can be used to screw the plunger 1.

[0068] In some embodiments provided by the present invention, the connecting section 102 of the plunger 1 is a second threaded section, used to connect with the threaded inner hole 302 of the rod 3. By threading the rod 3 to the plunger 1, a better fixing effect can be achieved for the rod 3.

[0069] In some embodiments of the present invention, the connecting section 102 is a smooth rod section, used to extend into the light hole 301 of the rod 3. By extending the plunger 1 into the light hole 301 of the rod 3, on the one hand, the plunger 1 can provide radial positioning for the rod 3, and on the other hand, the rod 3 can expand and contract along the smooth rod section when heated and elongated, thereby giving the rod 3 room for expansion and contraction, and avoiding the problem of stress generated during the elongation of the rod 3 causing damage to the connecting structure or the rod 3 itself.

[0070] Furthermore, such as Figures 5-7 As shown in the figure, the plunger 1 with a second threaded section is used to connect the lower mounting plate 2 and the lower end of the rod 3. Specifically, the lower end of the rod 3 has a threaded inner hole 302, which is threadedly connected to the second threaded section. The rod 3 abuts against the collar 107 of the plunger 1. Simultaneously, the plunger 1 with a smooth rod section is used to connect the upper mounting plate 2 and the upper end of the rod 3. That is, the upper end of the rod 3 has a smooth hole 301, and the smooth rod section of the plunger 1 extends into the smooth hole 301 of the rod 3.

[0071] In some embodiments provided by the present invention, the connecting hole 104 is an elongated hole extending along the length direction of the plunger 1. By setting the connecting hole 104 as an elongated hole extending along the length direction of the plunger 1, when adjusting the position of the plunger 1 along the threaded through hole 201, the adjustment range of the area covered by the elongated hole is larger, thereby increasing the adjustment range of the flow rate of the heat exchange medium. For example, the elongated hole can be a slotted hole.

[0072] In some embodiments of the present invention, there are multiple connecting holes 104, which are distributed circumferentially along the plunger 1. This arrangement reduces the flow resistance of the plunger 1 to the heat exchange medium, making the flow of the heat exchange medium smoother. For example, the multiple connecting holes 104 are evenly distributed circumferentially along the plunger 1.

[0073] This invention also provides a reaction apparatus.

[0074] The reaction apparatus includes a mounting plate 2, a rod 3, and a plunger 1 as described above. The rod 3 is connected to the mounting plate 2 via the plunger 1.

[0075] It should be noted that the reaction apparatus includes plunger 1, and therefore includes all the advantages of plunger 1, which will not be elaborated here.

[0076] Furthermore, the number of mounting plates 2 for the reaction apparatus is two. For ease of description, refer to... Figure 5As shown, the two mounting plates 2 are referred to as the upper mounting plate 2 and the lower mounting plate 2, respectively. It can be understood that in actual use, the two mounting plates 2 are not limited to being arranged vertically; for example, they can also be arranged horizontally.

[0077] Further, refer to Figures 5-7 As shown, there is a gap between the two mounting plates 2 to form a reaction space for accommodating the rod 3. The top end of the rod 3 is connected to the upper mounting plate 2 via a plunger 1 with an end cap 105, and the bottom end of the rod 3 is connected to the lower mounting plate 2 via a plunger 1 with a collar 107. (Reference) Figure 6 As shown, during operation, the heat exchange medium is introduced from the side of the upper mounting plate 2 away from the reaction space. The arrows in the figure represent the flow path of the heat exchange medium. The heat exchange medium enters the reaction space sequentially through the flow channel hole 103 and the connecting hole 104 of the plunger 1 with end 105, thereby exchanging heat with the rod 3. (Reference) Figure 7 As shown in the diagram, the arrows represent the flow paths of the heat exchange medium. Within the reaction space, after heat exchange with the rod 3, the medium exits the reaction space through the connecting hole 104 and flow channel hole 103 of the plunger 1 equipped with a collar 107, and is discharged below the lower mounting plate 2. Alternatively, the heat exchange medium can also be introduced from below the lower mounting plate 2; the principle is the same, and will not be elaborated further.

[0078] In some embodiments provided by this invention, the rod 3 is a fuel rod or an electric heating rod. When the rod 3 is a fuel rod, the reaction apparatus can be used in a nuclear reactor. When the rod 3 is an electric heating rod, the reaction apparatus can be used to conduct nuclear reaction simulation experiments.

[0079] In some embodiments of the present invention, the reaction apparatus further includes a detection device. The detection device is connected to the electric heating rod and is used to detect the parameter information of the electric heating rod. For example, the detection device can be a temperature sensor for detecting the temperature information of the electric heating rod, such as a temperature sensor including but not limited to a thermocouple. For example, when conducting nuclear reaction simulation experiments using the reaction apparatus, by setting multiple detection devices along the length of the electric heating rod, the surface temperature distribution of the electric heating rod can be measured, thereby enabling analysis and research on issues such as the gas flow characteristics and heat transfer characteristics of the rod bundle core structure.

[0080] The plunger 1 has a through-hole 103, and the detection device is located at one end of the through-hole 103 near the connecting section 102. The cable of the detection device is led out from the through-hole 103. Since the plunger 1 extends into the interior of the end of the rod 3, placing the detection device inside the through-hole 103 of the plunger 1 allows for the detection of the internal temperature information of the rod 3. Furthermore, by leading the cable of the detection device out from the through-hole, there is no need to create a cable routing hole on the mounting plate 2. This avoids encroaching on the mounting space of the rod 3, eliminates the need to consider the sealing of the cable routing hole, and ensures a simple structure for the mounting plate 2, making it easier to manufacture and providing higher strength.

[0081] Of course, for detection devices not located in the flow channel hole 103, their cables can be led out through the connecting hole 104 and the flow channel hole 103 in sequence.

[0082] Similarly, the cable of the electric heating rod can be led out of the reaction space via plunger 1, similar to the cable of the detection device.

[0083] In some embodiments of the present invention, the reaction apparatus further includes a manifold 5. The two ends of the manifold 5 are connected to two mounting plates 2, and the rod 3 is disposed inside the manifold 5. By providing the manifold 5, during the operation of the reaction apparatus, the heat exchange medium can exchange heat with the rod 3 within the manifold 5. The presence of the manifold 5 reduces the diffusion space of the heat exchange medium, allowing the heat exchange medium to more fully contact and exchange heat with the rod 3.

[0084] refer to Figure 10 As shown, optionally, both ends of the manifold 5 are provided with flanges 501, which are respectively connected to two mounting plates 2. For example, the flanges 501 and the mounting plates 2 are connected by threaded fasteners.

[0085] In some embodiments of the present invention, sealing elements 7 are provided between both ends of the manifold 5 and the two mounting plates 2. Specifically, sealing elements 7 are provided between the two flanges 501 of the manifold 5 and the corresponding mounting plates 2. This arrangement can prevent the heat exchange medium from leaking between the mating surfaces of the flanges 501 and the mounting plates 2. Optionally, the sealing element 7 includes, but is not limited to, graphite sealing rings.

[0086] refer to Figure 10 As shown, in some embodiments of the present invention, the reaction apparatus further includes a heat insulation layer 6. The heat insulation layer 6 is fitted onto the outside of the manifold 5. This arrangement prevents heat loss from the manifold 5. Optionally, the heat insulation layer 6 can be thermal insulation cotton, which can be fixed using stainless steel clamps.

[0087] refer to Figure 5As shown, in some embodiments of the present invention, the reaction apparatus further includes a housing 4. Two mounting plates 2 are installed inside the housing 4, which has a first through-hole 403 and a second through-hole 404 for the heat exchange medium to enter and exit. The first through-hole 403 is located above the upper mounting plate 2, and the second through-hole 404 is located below the lower mounting plate 2. This arrangement allows the housing 4 to provide thermal insulation. During use, the heat exchange medium can be introduced through the first through-hole 403, entering the reaction space from the upper plunger 1. After exchanging heat with the rod 3, the heat exchange medium exits the reaction space from the lower plunger 1 and finally exits through the second through-hole 404. Alternatively, the heat exchange medium can enter through the second through-hole 404 and exit through the first through-hole 403.

[0088] Furthermore, the outer casing 4 is provided with a wiring port 405. By providing the wiring port 405, the cables of the detection device and the electric heating rod can be led out from the wiring port 405. Furthermore, there are multiple wiring ports 405. Providing multiple wiring ports 405 facilitates the convenient routing of cables.

[0089] Optionally, the reaction apparatus also includes a sleeve 8. The sleeve 8 passes through the wiring port 405, with one end of the sleeve 8 extending into the housing 4 and the other end extending out of the housing 4 from the wiring port 405. Cables can be led out through the sleeve 8. A sealing structure is provided between the cable and the sleeve 8. For example, the sealing structure can be sealant filled inside the sleeve 8. This arrangement prevents airflow leakage from the sleeve 8, and by providing the sleeve 8, the connection length between the cable and the sleeve 8 is longer, which improves the sealing effect when filling with sealant.

[0090] Optionally, the sleeve 8 can be connected to the housing 4 by welding. However, the sleeve 8 is not limited to being connected to the housing 4 by welding. For example, the reaction apparatus may also include a nut 9. Figure 11 As shown, the sleeve 8 has a flange at one end inside the housing 4, and the flange abuts against the inner wall of the housing 4. The portion of the sleeve 8 outside the housing 4 has external threads, and the nut 9 connects to the external threads of the sleeve 8, thereby fixing the sleeve 8 inside the wiring port 405. Furthermore, the reaction device also includes gaskets 10, with gaskets 10 placed between the flange and the inner wall of the housing 4, and between the nut 9 and the outer wall of the housing 4. By providing gaskets, the gap between the sleeve 8 and the wiring port 405 can be sealed.

[0091] refer to Figure 8 , Figure 9As shown, in some embodiments of the present invention, the outer casing 4 includes a first casing 401 and a second casing 402. The first casing 401 and the second casing 402 are detachably connected, for example, by means of threaded fasteners. Both mounting plates 2 are installed inside the second casing 402. A first through-hole 403 is provided on the first casing 401, and a second through-hole 404 is provided on the second casing 402. This arrangement facilitates the installation of the two mounting plates 2 and the rod 3 into the interior of the outer casing 4.

[0092] refer to Figure 5 As shown, in some embodiments of the present invention, the inner wall of the outer casing 4 is provided with a first annular structure 4021 and a second annular structure 4022. The first annular structure 4021 supports the upper mounting plate 2; for example, the first annular structure 4021 can be welded to the inner wall of the outer casing 4. The second annular structure 4022 supports the lower mounting plate 2; for example, the second annular structure 4022 can be welded to the inner wall of the outer casing 4. The upper mounting plate 2 can be connected and fixed to the first annular structure 4021 by fasteners. The fasteners can be threaded fasteners, including but not limited to bolts and screws.

[0093] refer to Figure 8 As shown, optionally, the first housing 401 includes a cylindrical body 4011 and an end cap 4012, wherein a first end of the cylindrical body 4011 is used to connect to the second housing 402, and a second end of the cylindrical body 4011 is detachably connected to the end cap 4012. A wiring port 405 is provided on the cylindrical body 4011, and the wiring port 405 is located above the upper mounting plate 2. With this configuration, when the cable is led out from inside the housing 4 to outside the housing 4, the end cap 4012 can be opened, and then the cable can be arranged and threaded, which makes the operation more convenient.

[0094] It should be noted that, in some embodiments provided by the present invention, the features of the above embodiments can be combined to obtain a reaction device that simultaneously has all the above features.

[0095] For example, such as Figure 5 The reaction apparatus shown includes two mounting plates 2, a plunger 1 with an end 105 as described above, a plunger 1 with a collar 107 as described above, a manifold 5, a heat insulation layer 6, a gasket, a detection device, and a housing 4. It should be noted that "upper" and "lower" as used in the following description refer to... Figure 5 The "up" and "down" in this context are not intended to limit the usage process.

[0096] The two mounting plates 2 are spaced apart to form a reaction space for accommodating the rod 3. Both mounting plates 2 are provided with threaded through holes 201. One end of the rod 3 is connected to the upper mounting plate 2 via a plunger 1 with an end cap 105, and the other end of the rod 3 is connected to the lower mounting plate 2 via a plunger 1 with a collar 107. The plunger 1 is connected to the threaded through hole 201 of the corresponding mounting plate 2, allowing at least a portion of the orifice of the connecting hole 104 to enter the threaded through hole 201. A gasket is provided between the end cap 105 and the corresponding mounting plate 2, and a gasket is provided between the collar 107 and the corresponding mounting plate 2.

[0097] Both ends of the manifold 5 are connected to the corresponding mounting plates 2, and the rod is placed inside the manifold 5. A sealing element 7 is provided between both ends of the manifold 5 and the corresponding mounting plates 2.

[0098] Both mounting plates 2 are installed inside the outer casing 4. The outer casing 4 has a first through-hole 403 and a second through-hole 404 for the heat exchange medium to enter and exit. The first through-hole 403 is located above the upper mounting plate 2, and the second through-hole 404 is located below the lower mounting plate 2. The outer casing 4 includes a first housing 401 and a second housing 402, which are detachably connected. Both mounting plates 2 are installed inside the second housing 402. The first through-hole 403 is located on the first housing 401, and the second through-hole 404 is located on the second housing 402. The inner wall of the outer casing 4 has a first annular structure 4021 for supporting the upper mounting plate 2 and a second annular structure 4022 for supporting the lower mounting plate 2. The upper mounting plate 2 is connected to the first annular structure 4021 by threaded fasteners. The first housing 401 includes a cylindrical body 4011 and an end cap 4012, wherein one end of the cylindrical body 4011 is used to connect to the second housing 402, and the second end of the cylindrical body 4011 is detachably connected to the end cap 4012. The cylindrical body 4011 is provided with a wiring port 405 for cables to pass through.

[0099] The detection device is connected to the rod 3 and is used to detect the parameter information of the rod 3. The cable of the detection device is led out of the reaction space through the flow channel hole 103 or sequentially through the connecting hole 104 and the flow channel hole 103. After the cable of the detection device is led out of the reaction space, it is led out of the outer shell 4 through the wiring port 405 on the cylinder 4011.

[0100] The rod 3 is a fuel rod or an electric heating rod. The cable of the electric heating rod is led out of the reaction space through the flow channel hole 103 or sequentially through the connecting hole 104 and the flow channel hole 103. After the cable of the detection device is led out of the reaction space, it is led out of the outer shell 4 from the wiring port 405 on the cylinder 4011.

[0101] The installation steps of the reaction device in the above embodiments include:

[0102] The plunger 1 with a collar 107 is screwed onto the side of the lower mounting plate 2 near the mounting space, and the threaded inner hole 302 of the bar 3 is connected to the second threaded section of the plunger 1 with the collar 107.

[0103] The manifold 5 is fitted onto the outside of the rod 3, and the manifold 5 is connected to the lower mounting plate 2.

[0104] The heat insulation layer 6 is fitted onto the outside of the manifold 5.

[0105] Pass the cables of the electric heating rod and / or detection device through the threaded through-hole 201 of the upper mounting plate 2.

[0106] Pass the cable of the electric heating rod and / or the detection device through the corresponding plunger 1 with end 105.

[0107] The plunger 1 with end 105 is screwed onto the side of the upper mounting plate 2 away from the installation space, and the smooth rod section of the plunger 1 is inserted into the smooth hole 301 of the rod 3 through the threaded through hole 201.

[0108] Connect the upper mounting plate 2 to the collector cylinder 5.

[0109] The upper mounting plate 2 is placed on the first annular structure 4021 of the second housing 402, and the lower mounting plate 2 is placed on the second annular structure 4022. The upper mounting plate 2 and the first annular structure 4021 are connected by threaded fasteners.

[0110] Connect the cylinder 4011 to the second housing 402.

[0111] Lead the cables of the electric heating rod and / or detection device out from the wiring port 405 of the cylinder 4011.

[0112] Connect the end cap 4012 to the cylinder 4011.

[0113] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plunger (1), characterized in that, The mounting plate (2) is used to connect the mounting plate (2) and the rod (3). The mounting plate (2) is provided with a threaded through hole (201). The plunger (1) includes a first threaded section (101) for connecting with the threaded through hole (201) and a connecting section (102) for connecting with the rod (3). The plunger (1) is provided with a flow channel hole (103) and a connecting hole (104). The flow channel hole (103) passes through one end of the plunger where the first threaded section (101) is located and extends to the connecting section (102). The flow channel hole (103) is used to communicate with the space on the side of the mounting plate (2) away from the connecting section (102). The connecting hole (104) is located on the side wall of the plunger (1) and communicates with the flow channel hole (103). The connecting hole (104) is used to communicate with the space on the side of the mounting plate (2) near the connecting section (102). When the plunger is rotated, it moves axially along the threaded through hole. At least a portion of the orifice of the connecting hole can enter the threaded through hole to adjust the flow rate of the heat exchange medium. The mounting plate includes an upper mounting plate and a lower mounting plate, with a gap between the two mounting plates to form a reaction space for accommodating the rod (3). The heat exchange medium is introduced from the side of the upper mounting plate (2) away from the reaction space. The heat exchange medium enters the reaction space through the flow channel hole (103) and the connecting hole (104) of the plunger (1) with end (105) in sequence, thereby exchanging heat with the rod (3). After the heat exchange medium exchanges heat with the rod (3), it is discharged from the reaction space through the connecting hole (104) and the flow channel hole (103) of the plunger (1) with collar (107).

2. The plunger (1) according to claim 1, characterized in that, The end (105) is connected to the end of the first threaded segment (101) away from the connecting segment (102), the flow channel hole (103) passes through the end, the cross-sectional area of ​​the end (105) is larger than the cross-sectional area of ​​the first threaded segment (101), and the end (105) is used to abut against the side of the mounting plate (2) away from the connecting segment (102).

3. The plunger (1) according to claim 2, characterized in that, The inner wall of the flow channel hole (103) near the end (105) is provided with a polygonal hole (106). And / or, the outer sidewall of the end (105) is provided with at least one pair of mutually parallel planes.

4. The plunger (1) according to claim 1, characterized in that, The collar (107) is disposed between the connecting section (102) and the first threaded section (101). One end of the collar (107) is used to abut against the mounting plate (2), and the other end of the collar (107) is used to abut against the rod (3).

5. The plunger (1) according to claim 4, characterized in that, The connecting segment (102) has a polygonal hole (106) at one end away from the first threaded segment (101). And / or, the outer sidewall of the collar (107) is provided with at least one pair of mutually parallel planes.

6. The plunger (1) according to any one of claims 1-5, characterized in that, The connecting section (102) is a smooth rod section, used to extend into the light hole (301) of the rod (3).

7. The plunger (1) according to any one of claims 1-5, characterized in that, The connecting section (102) is a second threaded section used to connect with the threaded inner hole (302) of the bar (3).

8. The plunger (1) according to any one of claims 1-5, characterized in that, The connecting hole (104) is an elongated hole extending along the length direction of the plunger (1); And / or, the number of the connecting holes (104) is multiple, and the multiple connecting holes (104) are distributed circumferentially along the plunger (1).

9. A reaction apparatus, characterized in that, It includes a mounting plate (2), a rod (3) and a plunger (1) as described in any one of claims 1-8, wherein the rod (3) is connected to the mounting plate (2) via the plunger (1).

10. The reaction apparatus according to claim 9, characterized in that, The rod (3) is a fuel rod or an electric heating rod.

11. The reaction apparatus according to claim 10, characterized in that, It also includes a detection device, which is connected to the electric heating rod and is used to detect the parameter information of the electric heating rod. The flow channel hole (103) of the plunger (1) is provided through it. The detection device is located at one end of the flow channel hole (103) near the connecting section (102). The cable of the detection device is led out from the flow channel hole (103).

12. A nuclear reactor, characterized in that, Includes the reaction apparatus as described in any one of claims 9-11.

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