Guide mechanism and control rod driving device

Abstract

The invention relates to the technical field of gas cooled reactor maintenance, in particular to a guide mechanism and a control rod driving device. The matching shaft is fixed at the center of the power column; and the guide piece is slidably arranged on the outer wall of the matching shaft and above the power column. The transition piece is fixedly connected with the cantilever platform and located on one side of the power column, and the tangent line of the butt joint position of the transition piece and the power column is a horizontal line. Through the key technologies such as the winch rope structure and the outer rotor motor, the problem of jamming in the prior art is effectively solved, compared with chain transmission and rope transmission, the efficiency is higher, the friction loss is smaller, and the transmission efficiency and reliability are improved. System equipment components are reduced, and a powerful guarantee is provided for safe and stable operation of the high-temperature gas cooled reactor.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-cooled reactor maintenance, and in particular to a guiding mechanism and a control rod drive device. Background Art

[0002] In a high-temperature gas-cooled reactor, control rods are used to regulate reactor startup, power regulation, power maintenance, emergency shutdown, and normal cold shutdown. In order to ensure that the control rods perform the above-specified functions, the common control rod drive mechanism in a high-temperature gas-cooled reactor is chain drive, which realizes the above functions in principle. However, in actual engineering applications, the drive mechanism chain is jammed many times, seriously affecting the safe and stable operation of the system.

[0003] Therefore, a guiding mechanism and a control rod drive device are needed that can effectively relieve the jamming of the control rod drive mechanism, optimize the system layout as much as possible, and reduce the number of devices to meet the needs of the existing gas-cooled reactor environment. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above-mentioned prior art, there is a phenomenon that the drive mechanism chain of a common high-temperature gas-cooled reactor is jammed many times, seriously affecting the safe and stable operation of the system.

[0006] Therefore, the technical problem to be solved by the present invention is to design a guiding mechanism and a control rod drive device that can effectively relieve the jamming of the control rod drive mechanism, optimize the system layout as much as possible, and reduce the number of devices to meet the needs of the existing gas-cooled reactor environment.

[0007] To solve the above technical problem, the present invention provides the following technical solutions:

[0008] A power column, and a mating shaft fixed to the center of the power column;

[0009] A guiding member slidably disposed on the outer wall of the mating shaft and above the power column;

[0010] As an improvement of the present invention, guiding lines are fixedly formed on the outer wall of the mating shaft, and protrusions are fixedly provided on the inner wall of the guiding member, and the protrusions are slidably engaged with the guiding lines.

[0011] As an improvement of the present invention, a power assembly is fixedly provided inside the power column, and the mating shaft is fixedly connected to the power assembly.

[0012] As an improvement of the present invention, a protective cover is fixedly provided on the top of the power column, and the protective cover is located above the power assembly.

[0013] As an improvement of the present invention, a cantilever platform is fixedly provided on the top of the guide member, and the front end of the cantilever platform is located on one side of the power column.

[0014] As an improvement of the present invention, a wiring channel is provided through the center of the mating shaft, and the bottom of the mating shaft is located below the power column.

[0015] A control rod driving device comprises a transition piece fixedly connected to the cantilever platform and located at one side of the power column, and the tangent line of the docking position between the transition piece and the power column is a horizontal line.

[0016] As an improvement of the present invention, a rope running groove is fixedly formed on the outer wall of the transition piece, and a winding groove is fixedly formed on the outer wall of the power column.

[0017] As an improvement of the present invention, extension ends are provided on both sides of the transition piece, and the transition piece is rotatably connected to the extension ends.

[0018] As an improvement of the present invention, a connecting column is fixedly provided on the top of the extending end, a matching hole is fixedly opened on the front end of the cantilever platform, and the top of the connecting column is fixedly connected to the matching hole.

[0019] The beneficial effects of the present invention are as follows: through key technologies such as the hoisting rope structure and the outer rotor motor, the jamming problem in the prior art is effectively solved. Compared with the chain transmission, the rope transmission efficiency is higher and the friction loss is smaller, which improves the transmission efficiency and reliability. The system equipment components are reduced, which provides a strong guarantee for the safe and stable operation of the high temperature gas-cooled reactor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 It is an overall schematic diagram of the operating scenario in the present invention.

[0022] Figure 2 It is a three-dimensional schematic diagram of the main structure of the present invention.

[0023] Figure 3 It is a cross-sectional view of the inner matching plane of the guide member and the matching shaft in the present invention.

[0024] Figure 4 Another perspective structural schematic diagram in the present invention.

[0025] Figure 5 Internal structural schematic diagram in the present invention. Specific embodiments

[0026] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following will give a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings of the specification.

[0027] Embodiment 1

[0028] Referring to Figure 1 , this embodiment provides a guiding mechanism.

[0029] It is made of 7075 aviation aluminum alloy material, which has good strength, stiffness, and corrosion resistance, and can meet the usage requirements in the harsh environment of the high-temperature gas-cooled reactor. The power column 100 adopts a segmented design and can use flange or other common industrial connection methods, which is convenient for installation and maintenance. A power source is arranged inside the power column 100 to drive the movement of the mating shaft 101 and ensure its concentric rotational movement with the power column 100.

[0030] The mating shaft 101 is made of stainless steel material, which has good corrosion resistance and wear resistance, and can meet the usage requirements in the harsh environment of the high-temperature gas-cooled reactor. The local surface of the mating shaft 101 is polished to reduce the surface roughness and friction loss. Threads are provided on the outer wall at the upper position of the mating shaft 101, and the threads are used to cooperate with the guide member 200 for operation.

[0031] The guide member 200 is made of stainless steel material, which has good wear resistance, corrosion resistance, and high-temperature resistance, and can be used for a long time in the harsh environment of the high-temperature gas-cooled reactor. A ball bearing is arranged inside the guide member to reduce the friction loss with the mating shaft and improve the movement accuracy and efficiency

[0032] The guide member 200 and the mating shaft 101 are in sliding fit, and its own threads can also prevent the guide member 200 from slipping, with a self-locking effect. When the control system issues a control rod drive command, the power source inside the power column 100 starts, driving the rotation of the mating shaft 101, and driving the guide member 200 to rise through the threads at the upper position of the mating shaft 101.

[0033] When the guide member 200 axially moves to the specified position along the mating shaft 101, the control system stops the operation of the power source to achieve the precise positioning of the control rod.

[0034] Embodiment 2

[0035] Referring to Figures 1 to 3, this embodiment is based on the previous embodiment, and what is different from the previous embodiment is

[0036] On the outer wall above the mating shaft 101, a guiding pattern 101a is fixedly formed. The guiding pattern 101a is similar to a thread. On the inner wall of the guiding member 200, a convex block 201 is fixedly provided. The convex block 201 and the guiding pattern 101a are in sliding fit. The convex block 201 can be replaced by a structure such as a ball bearing to reduce the frictional loss with the mating shaft 101, and can cooperate more smoothly with the guiding pattern 101a. The guiding pattern 101a itself can also provide a self-locking effect to prevent the guiding member 200 from slipping.

[0037] The power assembly 102 is fixedly arranged inside the power column 100. The mating shaft 101 is fixedly connected to the power assembly 102. When the power assembly 102 starts to rotate under the action of remote control, it can also drive the mating shaft 101 to rotate synchronously.

[0038] The overall structure of the guiding member 200 is similar to a lead screw. While the mating shaft 101 rotates, the guiding member 200 can perform a linear motion. At the top of the guiding member 200, a cantilever platform 202 is fixedly provided. The cantilever platform 202 can move along with the movement of the guiding member 200. At the top of the power column 100, a protective cover 101c is fixedly provided. The protective cover 101c is detachable and can effectively protect the power assembly 102 from above. Simple disassembly also facilitates the staff to observe and maintain the power assembly 102. The power assembly 102 uses an outer rotor motor, which has a compact structure, high material utilization rate, stronger power density, and more stable power output, and smoother start and stop processes, with less vibration and noise.

[0039] The front end of the cantilever platform 202 is located on one side of the power column 100 and is used to connect the remaining wiring structures. A wiring channel 101b is fixedly and centrally formed through the mating shaft 101. A towing rope can be accommodated in the wiring channel 101b. The towing rope penetrates through the entire wiring channel 101b and the mating shaft 101. At the bottom of the mating shaft 101 and below the power column 100, the towing rope is fixedly connected to a control rod to be adjusted, and the towing rope can drive the control rod to lift and play a role.

[0040] Embodiment 3

[0041] Refer to Figures 1 to 5 , this embodiment is based on the previous embodiment, and what is different from the previous embodiment is:

[0042] The transition member 300 is fixedly connected to the front end of the cantilever platform 202. On both sides of the transition member 300, extension ends 400 are provided for accommodating and protecting the transition member 300. The transition member 300 is designed in the form of a pulley and is rotatably connected to the extension ends 400 itself.

[0043] The function of the transition piece 300 is to accommodate the traction rope. A rope running groove 301 is fixedly provided on the outer wall of the transition piece 300, and a winding groove 101d is fixedly provided on the outer wall of the power column 100. Both the winding groove 101d and the rope running groove 301 play the role of accommodating the traction rope. The traction rope accommodated by the transition piece 300 and the power column 100 is at a horizontal angle of approximately 180 degrees at the tangent position of the docking, and is always kept in a straight line to prevent the traction rope from falling off from the winding groove 101d due to excessive local deflection angle.

[0044] A connecting column 401 is fixedly provided at the top of the extension end 400, and a matching hole 202a is fixedly opened at the front end of the cantilever platform 202. The top of the connecting column 401 and the matching hole 202a are fixedly connected, thereby ensuring that the connecting column 401 and the transition piece 300 at the bottom of the extension end 400 can achieve synchronous linear motion with the cantilever platform 202 during the rotation of the matching shaft 101. The cantilever platform 202 thus descends or rises to a specified position to ensure that the traction rope is approximately 180 degrees horizontally at the tangent position of the docking, and is kept in a straight line as much as possible to prevent the traction rope from falling off from the winding groove 101d due to excessive local deflection angle, resulting in subsequent jamming and the like.

[0045] The stable movement of the traction rope ensures that the control rod can be inserted and pulled out stably under the movement of the entire device.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A guiding mechanism, characterized in that: including, a power column (100), and a mating shaft (101) fixed to the center of the power column (100); a guide member (200) slidably disposed on the outer wall of the mating shaft (101) and above the power column (100).

2. The guiding mechanism according to claim 1, wherein: A guiding pattern (101a) is fixedly formed on the outer wall of the mating shaft (101), and a convex block (201) is fixedly disposed on the inner wall of the guide member (200), and the convex block (201) is in sliding fit with the guiding pattern (101a).

3. The guiding mechanism according to claim 1, wherein: A power assembly (102) is fixedly disposed inside the power column (100), and the mating shaft (101) is fixedly connected to the power assembly (102).

4. The guiding mechanism according to claim 1, characterized in that: A protective cover (101c) is fixedly disposed on the top of the power column (100), and the protective cover (101c) is located above the power assembly (102).

5. The guiding mechanism according to any one of claims 1 to 4, characterized in that: A cantilever platform (202) is fixedly disposed on the top of the guide member (200), and the front end of the cantilever platform (202) is located on one side of the power column (100).

6. The guiding mechanism according to claim 5, characterized in that: A wire routing channel (101b) is formed through the center of the mating shaft (101), and the bottom of the mating shaft (101) is located below the power column (100).

7. A control rod drive device, characterized in that: including the guiding mechanism according to claim 6, and: a transition member (300) fixedly connected to the cantilever platform (202) and located on one side of the power column (100), and the tangent line of the docking position between the transition member (300) and the power column (100) is horizontal.

8. The control rod drive device according to claim 7, characterized in that: A wire routing groove (301) is fixedly formed on the outer wall of the transition member (300), and a winding groove (101d) is fixedly formed on the outer wall of the power column (100).

9. The control rod drive device according to claim 8, wherein: Extension ends (400) are disposed on both sides of the transition member (300), and the transition member (300) is rotatably connected to the extension ends (400).

10. The control rod drive device according to claim 9, characterized in that: A connecting column (401) is fixedly disposed on the top of the extension end (400), and a mating hole (202a) is fixedly formed at the front end of the cantilever platform (202), and the top of the connecting column (401) is fixedly connected to the mating hole (202a).

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