Guiding tool used during source discharge of built-in radioactive source

Abstract

A guiding tool for placing a built-in radioactive source relates to a guiding tool, and is characterized in that a barrier strip (11) is slidably clamped at the top of a tube body (2) through an arc-shaped clamping gap (18), an arc-shaped baffle (17), a conical arc plate (7) and an arc-shaped protective plate (10) are all arranged in a guiding cavity, the arc-shaped baffle (17) can completely shield a gap A (12), the conical arc plate (7) can completely shield a gap B (13), and the arc-shaped protective plate (10) can completely shield a gap C (16); the tube body is arranged at the neck expanding end of the conical tube, the insertion tube is arranged at the neck reducing end of the conical tube, the guide tube is formed, the through seam is formed in the side wall of the guide tube, and the radioactive source steel cable can smoothly enter the source tube by covering the through seam through the barrier strip capable of sliding on the guide tube. And the barrier strip can be moved away to achieve the purpose of conveniently taking down the guide pipe.

Description

Technical Field

[0001] The utility model relates to a guiding tool, in particular to a guiding tool for discharging a built-in radioactive source. Background Art

[0002] When measuring the internal density of the reactor of the ebullated bed residue oil hydrocracking unit, it is necessary to place the radioactive source from the bottom opening of the lead tank set above the ebullated bed residue oil hydrocracking unit by placing a steel cable with multiple radioactive sources into the ebullated bed residue oil hydrocracking unit by means of a placement rope. In actual field use, the lead tank is 1 meter apart from the source pipe, the placement inlet source pipe of the ebullated bed residue oil hydrocracking unit is a stainless steel source pipe with an inner diameter of DN50, and the lead tank is not coaxial with the source pipe mouth. The radioactive source exists in the form of a bare source and its diameter is larger than the steel cable, so personnel cannot perform guiding operations at close range, and can only use tools that facilitate the entry of the steel cable with multiple radioactive sources. Since the steel cable with multiple radioactive sources needs to be removed from the connection between the steel cable and the placement rope in time after entering, it is necessary to design a guiding tool that facilitates the entry of the steel cable with multiple radioactive sources and is easy to disassemble. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model discloses a guiding tool for discharging a built-in radioactive source, wherein a tube body is arranged at the expanded neck end of a conical tube and an insert tube is arranged at the contracted neck end of the conical tube to form a guide tube, a through slit is arranged on the side wall of the guide tube, and a baffle bar that can slide on the guide tube is used to cover the through slit so that the radioactive source cable can smoothly enter the source tube, and the baffle bar can be removed to facilitate the removal of the guide tube.

[0004] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0005] A guide tool for discharging a built-in radioactive source comprises a guide tube and a baffle, wherein the guide tube comprises a tapered tube, a tapered cavity is arranged in the tapered tube, a slit B is arranged on the side wall of the tapered tube, a tube body extending upward is arranged at the expanded neck end located at the top of the tapered tube, a tube cavity A penetrating the tapered cavity is arranged in the tube body, a slit A penetrating the slit B is arranged on the side wall of the tube body, a downwardly extending insert tube is arranged at the contracted neck end located at the bottom of the tapered tube, a cavity penetrating the tapered cavity is arranged in the insert tube, a slit C penetrating the slit B is arranged on the side wall of the insert tube, the tube cavity A, the tapered cavity and the cavity body are connected to form a guide cavity, and the slit A, the slit B and the slit C are connected to form a through slit The baffle includes a conical arc plate, an arc baffle extending upward is provided at the expanded neck end at the top of the conical arc plate, and an arc guard plate extending downward is provided at the contracted neck end at the bottom of the conical arc plate. An arc flange is provided on one side of the outer arc surface at the top of the arc baffle, and an arc clamping plate arranged at intervals from the arc baffle is provided at the end of the arc flange. The gap between the arc clamping plate and the arc baffle forms an arc clamping seam, and the baffle is slidably clamped on the top of the tube body by using the arc clamping seam. The arc baffle, the conical arc plate and the arc guard plate are all placed in the guide cavity. The arc baffle can completely block the gap A, the conical arc plate can completely block the gap B, and the arc guard plate can completely block the gap C.

[0006] The guiding tool for discharging the built-in radioactive source is provided with a handle A on the outer wall of the tube body.

[0007] The guiding tool for the internal radioactive source during discharge is provided with a handle B on the outer wall of the arc-shaped clamping plate.

[0008] The guiding tool for the built-in radioactive source during discharge, the outer wall of the arc-shaped baffle is fitted with the inner wall of the tube body.

[0009] The guiding tool for the built-in radioactive source during discharge, the outer wall of the conical arc plate and the inner wall of the conical tube are fitted together.

[0010] The guiding tool for the built-in radioactive source during discharge, the outer wall of the arc-shaped guard plate is fitted with the inner wall of the cannula.

[0011] The guide tool for the built-in radioactive source during discharge has a diameter of the expanded neck end of the tapered tube that is 3 to 5 times the diameter of the contracted neck end of the tapered tube.

[0012] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0013] The guiding tool for discharging a built-in radioactive source disclosed in the present invention is formed by arranging a tube body at the expanded neck end of a tapered tube and an insert tube at the contracted neck end of the tapered tube, a through slit is arranged on the side wall of the guide tube, a retaining bar that can slide on the guide tube is used to cover the through slit so that the radioactive source cable can smoothly enter the source tube, and the retaining bar can be removed to facilitate the removal of the guide tube. The utility model has the characteristics of simple structure, easy use, high stability, safety and reliability, and solves the problem that personnel cannot perform the guiding operation of the radioactive source cable at close range. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the guide tube of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the baffle of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the utility model in which the baffle bar and the through seam are separated;

[0018] Figure 5 This is a structural schematic diagram of the baffle of the utility model from another perspective.

[0019] In the figure: 1. tube cavity A; 2. tube body; 3. handle A; 4. arc-shaped clamping plate; 5. handle B; 6. tapered tube; 7. tapered arc plate; 8. guide tube; 9. insert tube; 10. arc-shaped guard plate; 11. baffle; 12. gap A; 13. gap B; 14. tapered cavity; 15. cavity body; 16. gap C; 17. arc-shaped baffle; 18. arc-shaped clamping seam; 19. arc-shaped flange. DETAILED DESCRIPTION

[0020] The present invention can be explained in more detail through the following embodiments. The present invention is not limited to the following embodiments. The purpose of disclosing the present invention is to protect all changes and improvements within the scope of the present invention.

[0021] Combined with Figures 1 to 5The guide tool for the discharge of the built-in radioactive source described in the invention comprises a guide tube 8 and a baffle 11, wherein the guide tube 8 comprises a tapered tube 6, a tapered cavity 14 is provided in the tapered tube 6, a slit B13 is provided on the side wall of the tapered tube 6, a tube body 2 extending upward is provided at the expanded neck end at the top of the tapered tube 6, a tube cavity A1 penetrating the tapered cavity 14 is provided in the tube body 2, a slit A12 penetrating the slit B13 is provided on the side wall of the tube body 2, and a slit B13 is provided at the contracted neck end at the bottom of the tapered tube 6. The cannula 9 extends downward, and a cavity 15 penetrating the conical cavity 14 is provided in the cannula 9. A slit C16 penetrating the slit B13 is provided on the side wall of the cannula 9. The lumen A1, the conical cavity 14 and the cavity 15 are connected to form a guide cavity. The slits A12, B13 and C16 are connected to form a through slit. The baffle 11 includes a conical arc plate 7. The expanded neck end at the top of the conical arc plate 7 is provided with an arc baffle 17 extending upward, and the contracted neck end at the bottom of the conical arc plate 7 is provided with a The arc-shaped guard plate 10 extending downward is provided with an arc-shaped flange 19 on one side of the outer arc surface at the top of the arc-shaped baffle plate 17, and an arc-shaped clamping plate 4 is provided at the end of the arc-shaped flange 19, and the gap between the arc-shaped clamping plate 4 and the arc-shaped baffle plate 17 forms an arc-shaped clamping seam 18, and the baffle bar 11 is slidably clamped on the top of the tube body 2 by using the arc-shaped clamping seam 18, and the arc-shaped baffle plate 17, the conical arc plate 7 and the baffle bar 11 are all placed in the guide cavity, and the outer wall of the arc-shaped baffle plate 17 and the tube body 2, the arc baffle 17 can completely block the gap A12, the outer wall of the conical arc plate 7 is in contact with the inner wall of the conical tube 6, the conical arc plate 7 can completely block the gap B13, the outer wall of the arc guard plate 10 is in contact with the inner wall of the insert tube 9, the arc guard plate 10 can completely block the gap C16, a handle A3 is provided on the outer wall of the tube body 2, a handle B5 is provided on the outer wall of the arc clamping plate 4, and the diameter of the expanded neck end of the conical tube 6 is 3 to 5 times the diameter of the contracted neck end of the conical tube 6.

[0022] The guiding tool for discharging the built-in radioactive source described in the utility model is implemented. When using it, the operator holds the handle A3 with one hand and the handle B5 with the other hand, slides the baffle 11 to the through-slit, makes the two sides of the baffle 11 and the two sides of the through-slit contact and completely cover the through-slit, and then inserts the insertion tube 9 provided in the utility model into the source tube provided at the top of the boiling bed residue oil hydrocracking device. The operator leaves the source tube and reaches the top of the lead tank, and fixes the top of the steel cable with multiple radioactive sources with the placement rope and ties down the steel cable with multiple radioactive sources. Since the mouth of the tube body 2 is relatively large, the lower end of the steel cable with multiple radioactive sources can easily reach the conical cavity 14 provided in the conical tube 6 through the tube cavity A1 along the mouth of the tube body 2. Under the limitation of the conical cavity 14, the lower end of the steel cable with multiple radioactive sources can easily reach the conical cavity 14 provided in the conical tube 6. Arriving in the cavity 15 provided in the insert tube 9, the lower end of the steel cable with multiple radioactive sources passes through the cavity 15 and reaches the source tube, until it reaches the inside of the fluidized bed residue oil hydrocracking device. After all the multiple radioactive sources have entered the fluidized bed residue oil hydrocracking device, it is necessary to separate the placement rope and the steel cable with multiple radioactive sources. At this time, it is necessary to remove the utility model. Since the multiple radioactive sources have entered the fluidized bed residue oil hydrocracking device, the operator will not be affected by radiation when operating at the source tube mouth. The operator holds the handle A3 with one hand and the handle B5 with the other hand, and slides the baffle 11 until it no longer blocks the through seam. Since the diameters of the steel cable and the placement rope are relatively thin, it is easy to remove the utility model, which solves the problem that personnel cannot perform the radioactive source steel cable guiding operation at close range.

[0023] The parts not described in detail in this utility model are prior art.

Claims

1. A guiding tool for the discharge of a built-in radioactive source. Its characteristics are: The invention comprises a guide tube (8) and a baffle (11), wherein the guide tube (8) comprises a tapered tube (6), a tapered cavity (14) is provided in the tapered tube (6), a slit B (13) is provided on the side wall of the tapered tube (6), a tube body (2) extending upward is provided at the expanded neck end located at the top of the tapered tube (6), a tube cavity A (1) penetrating the tapered cavity (14) is provided in the tube body (2), and a slit A (13) penetrating the slit B (13) is provided on the side wall of the tube body (2). 12), a downwardly extending insert tube (9) is provided at the necked end at the bottom of the conical tube (6), a cavity (15) penetrating the conical cavity (14) is provided in the insert tube (9), a slit C (16) penetrating the slit B (13) is provided on the side wall of the insert tube (9), the tube cavity A (1), the conical cavity (14) and the cavity (15) are connected to form a guide cavity, and the slit A (12), the slit B (13) and the slit C (16) are connected to form a through slit, and the baffle bar (11) comprises a conical arc plate (7), an arc baffle (17) extending upward is provided at the expanded neck end at the top of the conical arc plate (7), an arc guard plate (10) extending downward is provided at the contracted neck end at the bottom of the conical arc plate (7), an arc flange (19) is provided on one side of the outer arc surface at the top of the arc baffle (17), an arc clamping plate (4) is provided at the end of the arc flange (19) and is spaced from the arc baffle (17), and the arc clamping plate (4) and the arc baffle (17) are connected to each other. The gap between the arc-shaped baffle plates (17) forms an arc-shaped snap-fitting gap (18), and the baffle bar (11) is slidably snap-fitted to the top of the tube body (2) by utilizing the arc-shaped snap-fitting gap (18). The arc-shaped baffle plates (17), the conical arc plates (7) and the arc-shaped guard plates (10) are all placed in the guide cavity. The arc-shaped baffle plates (17) can completely cover the gap A (12), the conical arc plates (7) can completely cover the gap B (13), and the arc-shaped guard plates (10) can completely cover the gap C (16).

2. The guiding tool for the internal radioactive source according to claim 1, Its characteristics are: A handle A (3) is provided on the outer wall of the tube body (2).

3. The guiding tool for the internal radioactive source according to claim 1, Its characteristics are: A handle B (5) is provided on the outer wall of the arc-shaped clamping plate (4).

4. The guiding tool for the internal radioactive source during discharge according to claim 1, Its characteristics are: The outer wall of the arc-shaped baffle (17) is in contact with the inner wall of the tube body (2).

5. The guiding tool for the internal radioactive source during discharge according to claim 1, Its characteristics are: The outer wall of the conical arc plate (7) is in contact with the inner wall of the conical tube (6).

6. The guiding tool for the internal radioactive source during discharge according to claim 1, Its characteristics are: The outer wall of the arc-shaped guard plate (10) is in contact with the inner wall of the insertion tube (9).

7. The guiding tool for the internal radioactive source during discharge according to claim 1, Its characteristics are: The diameter of the expanded neck end of the tapered tube (6) is 3 to 5 times the diameter of the contracted neck end of the tapered tube (6).

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