A safety protection device for the suspension rope of a radiation source

Abstract

The present invention relates to the technical field of the construction of a radiation field of a radiation source, and provides a safety protection device for a lifting rope of a radiation source, which comprises a two-section lifting rope of an underwater lifting rope and an above-water lifting rope, and the two sections of lifting ropes respectively adopt the redundancy mode of a main rope and a deputy rope. When the radiation source is in a non-operating state, the main body is submerged in a pool, and the lifting rope section connected to the radiation source is the underwater lifting rope, and the lifting rope section located above the pool and connected to the driving mechanism is the above-water lifting rope, and the two sections of lifting ropes are connected through a connecting limit ring. The safety protection device for the lifting rope of the radiation source of the present invention has a simple structure and is convenient to use. The underwater and above-water two independent lifting ropes can be independently protected and maintained. Each section of the lifting rope is provided with a main / deputy rope, and the double redundancy protection can avoid the overall fracture of the lifting rope; the rope can be safely replaced without contacting the radiation source.

Description

Technical Field

[0001] The present invention relates to the technical field of the construction of a radiation field of a radiation source, and specifically relates to a safety protection device for a sling of a radiation source. Background Art

[0002] Establishing a radiation field of a radiation source is an important means and basis for nuclear technology applications, and can be used for applications such as the calibration and verification of the quantity values of radiation monitoring instruments, the testing of the shielding performance of radiation shielding materials, the irradiation modification of industrial materials, and the irradiation preservation of agricultural and sideline products. The radiation sources mainly refer to neutron radiation sources and γ radiation sources.

[0003] The radiation sources in the radiation field usually adopt a sling drive mode and are stored in a shielding pool. When in the non-working state, the radiation source falls into the pool under gravity and the rays are shielded. When in the working state, the sling lifts the radiation source out of the pool and the rays are emitted. Since the radiation emitted by the radiation source can cause harm to the human body, it is necessary to take protective measures for the radiation source.

[0004] Currently, the protection methods for sling-driven radiation sources mainly consider measures such as preventing the sling pulley from jamming and the automatic return of the radiation source under gravity, but less consideration is given to the protection of the sling of the radiation source itself, and there are the following deficiencies: First, the technical means for preventing the sling from breaking are single, mainly considering material selection and water quality purification, but the risk of the rope body breaking cannot be completely eliminated; second, the measures for limiting the consequences of the sling breaking are insufficient. After the sling breaks, the rope end will sink into the water, resulting in the out-of-control of the radiation source; third, the operation of maintaining and replacing the sling is inconvenient. Usually, it is necessary to be in close contact with the radiation source, which may cause radiation damage. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies of the above background art, and provide a safety protection device for a sling of a radiation source, which is used to prevent the overall breakage of the sling, limit the consequences of the sling breakage, and avoid radiation damage during the maintenance process of the sling.

[0006] The purpose of the present invention is achieved by the following technical measures.

[0007] A safety protection device for a sling of a radiation source includes a two-stage sling of an underwater sling and an above-water sling, and the two slings respectively adopt the redundant mode of a main rope and a secondary rope. When the radiation source is in the non-working state, the main body is submerged in the pool and the sling segment connected to the radiation source is the underwater sling. The sling segment located above the pool as a whole and connected to the driving mechanism is the above-water sling. The two slings are connected by a connecting limit ring, which can facilitate the independent maintenance of the two rope bodies.

[0008] In the above technical solution, both the underwater lifting rope and the above-water lifting rope are provided with a main rope and a secondary rope, and the length of the secondary rope is longer than that of the main rope. In the normal working state, the main rope is stressed to tighten the radiation source, and the secondary rope is slack for standby. In the protection working state, when the main rope breaks and becomes slack, the secondary rope tightens the radiation source, which can prevent the overall (simultaneous) breakage of the radiation source lifting rope and the resulting loss of control of the radiation source due to its detachment.

[0009] In the above technical solution, the device includes an underwater lifting rope, an above-water lifting rope, a connecting limit ring, and a pool cover plate. The underwater lifting rope includes a main underwater lifting rope and a secondary underwater lifting rope. The above-water lifting rope includes a main above-water lifting rope and a secondary above-water lifting rope. A connecting limit ring is provided between the underwater lifting rope and the above-water lifting rope to connect the two, and the diameter of the connecting limit ring is larger than the diameter of the opening on the pool cover plate, so as to ensure that when the entire above-water lifting rope breaks, the connecting limit ring can be stuck above the opening of the pool cover plate to prevent the radiation source and the underwater lifting rope from completely falling into the pool.

[0010] In the above technical solution, the lower end of the underwater lifting rope is connected to the radiation source pull ring, and the upper end is connected to the connecting limit ring. The underwater lifting rope passes through the opening of the pool cover plate. The lower end of the above-water lifting rope is connected to the connecting limit ring, and the upper end is connected to the driving mechanism.

[0011] In the above technical solution, one end of the underwater lifting rope passes through the inside of the radiation source pull ring, then passes through the connecting limit ring and is knotted with the rope tail. After the loop connection, the lifting rope can smoothly rotate and slide in the two pull ring holes, enabling the cyclic replacement of the underwater lifting rope.

[0012] In the above technical solution, when maintaining the underwater lifting rope, a radiation source limit rod is installed to limit the position of the radiation source. The lower end of the radiation source limit rod is provided with a bifurcated structure, and the underwater lifting rope passes through the bifurcated structure, with the radiation source located below the bifurcated structure. The radiation source limit rod is provided to ensure that the underwater lifting rope will not lift the radiation source out of the shielding position during the rotational sliding, avoiding accidental radiation exposure to maintenance personnel.

[0013] The radiation source lifting rope safety protection device of the present invention has the following advantages compared with the prior art:

[0014] 1. The underwater and above-water sections of the lifting rope are independent, allowing for independent protection and maintenance;

[0015] 2. Each section of the lifting rope is provided with a main / secondary rope, and the dual redundant protection can prevent the overall breakage of the lifting rope;

[0016] 3. The diameter of the connecting limit ring is larger than the aperture of the pool cover plate, which can prevent the underwater lifting rope from falling into the pool together with the radiation source;

[0017] 4. The underwater lifting rope adopts a loop connection method and is used in combination with the radiation source limit rod, enabling the safe replacement of the rope without contacting the radiation source. Description of the Drawings

[0018] Figure 1 This is a schematic structural diagram of the radioactive source suspension rope safety protection device according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic structural diagram of the radioactive source limiting rod in an embodiment of the present invention.

[0020] Wherein: 1. Main underwater suspension rope, 2. Sub - underwater suspension rope, 3. Connecting limit ring, 4. Pool cover plate, 5. Main above - water suspension rope, 6. Sub - above - water suspension rope, 7. Radioactive source limiting rod, 8. Active rope cutter, 9. Radioactive source and pull ring. Specific embodiments

[0021] To make the above - mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] As Figure 1 shown, an embodiment of the present invention provides a radioactive source suspension rope safety protection device, which is composed of a main underwater suspension rope 1, a sub - underwater suspension rope 2, a connecting limit ring 3, a pool cover plate 4, a main above - water suspension rope 5, a sub - above - water suspension rope 6, a radioactive source limiting rod 7, and an active rope cutter 8.

[0025] The lower ends of the main underwater suspension rope 1 and the sub - underwater suspension rope 2 are connected to the radioactive source pull ring, and the upper ends are connected to the connecting limit ring 3, and the main underwater suspension rope 1 and the sub - underwater suspension rope 2 pass through the openings in the pool cover plate 4; the lower ends of the main above - water suspension rope 5 and the sub - above - water suspension rope 6 are connected to the connecting limit ring 3, and the upper ends are connected to the driving mechanism, and the main above - water suspension rope 5 and the sub - above - water suspension rope 6 pass through the cutting holes of the active rope cutter 8.

[0026] The main underwater lifting rope 1 and the main above-water lifting rope 5 are made of steel wire ropes, and the auxiliary underwater lifting rope 2 and the auxiliary above-water lifting rope 6 are made of nylon ropes. Also, the length of the auxiliary ropes is slightly longer than that of the main ropes. In the normal state, the main ropes are taut to bear the weight, and the auxiliary ropes are slack and do not bear the weight. When the main ropes break, the auxiliary ropes automatically become taut to bear the weight and enter the protection state.

[0027] The lower end of the connecting limit ring 3 is connected to the main underwater lifting rope 1 and the auxiliary underwater lifting rope 2, and the upper end is connected to the main above-water lifting rope 5 and the auxiliary above-water lifting rope 6. The connecting limit ring 3 is located above the opening of the pool cover plate 4, and the diameter of the connecting limit ring 3 is larger than the diameter of the opening of the pool cover plate 4. When the main above-water lifting rope 5 and the auxiliary above-water lifting rope 6 break as a whole (such as being cut by the active rope cutter 8), the connecting limit ring 3 drops and gets stuck above the opening of the pool cover plate 4 to enter the protection state, preventing the main underwater lifting rope 1, the auxiliary underwater lifting rope 2, and the radiation source from falling into the pool.

[0028] The rope ends of the main underwater lifting rope 1 and the auxiliary underwater lifting rope 2 first pass through the pull ring of the radiation source, and then pass through the connecting limit ring 3 and are knotted with the rope tails. After the loop connection, the main underwater lifting rope 1 and the auxiliary underwater lifting rope 2 can smoothly rotate in the two pull ring holes. When it is necessary to replace the main underwater lifting rope 1 and the auxiliary underwater lifting rope 2, a new rope can be tied to the joint of the old rope, and the old rope is rotated to drive the new rope to pass through the two pull rings and then knotted to complete the cyclic replacement.

[0029] As Figure 2 shown, when maintaining the underwater lifting rope, a radiation source limiting rod 7 is installed to limit the position of the radiation source. The lower end of the radiation source limiting rod 7 is provided with a bifurcated structure, and the underwater lifting rope passes through the bifurcated structure, and the radiation source is located below the bifurcated structure. The radiation source limiting rod 7 is used to ensure that the main underwater lifting rope 1 and the auxiliary underwater lifting rope 2 will not lift the radiation source out of the shielding position when rotating and sliding.

[0030] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0031] The above-described method is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A safety protection device for the suspension rope of a radiation source, characterized in that: Including an underwater lifting rope, an above-water lifting rope, a connecting limit ring, and a pool cover plate. The underwater lifting rope includes a main underwater lifting rope and a secondary underwater lifting rope. The above-water lifting rope includes a main above-water lifting rope and a secondary above-water lifting rope. A connecting limit ring is arranged between the underwater lifting rope and the above-water lifting rope to connect the two, and the diameter of the connecting limit ring is greater than the diameter of the opening on the pool cover plate. The lower end of the underwater lifting rope is connected to the radioactive source pull ring, and the upper end is connected to the connecting limit ring, and the underwater lifting rope passes through the opening of the pool cover plate. The lower end of the above-water lifting rope is connected to the connecting limit ring, and the upper end is connected to the driving mechanism. One end of the underwater lifting rope passes through the radioactive source pull ring, then passes through the connecting limit ring and knots with the rope tail. After the loop connection, the underwater lifting rope can smoothly rotate and slide in the two pull ring holes. When the underwater lifting rope needs to be replaced, a new rope is tied to the old rope joint, and the old rope is rotated to drive the new rope to pass through the two pull rings and then knot to complete the cyclic replacement. Both the underwater lifting rope and the above-water lifting rope are provided with two ropes, namely a main rope and a secondary rope, and the length of the secondary rope is longer than that of the main rope. In the normal working state, the main rope is stressed to tighten the radioactive source, and the secondary rope is slack for standby. In the protection working state, when the main rope breaks and becomes slack, the secondary rope tightens the radioactive source.

2. The radioactive source lifting rope safety protection device according to claim 1, characterized in that: underwater When maintaining the underwater lifting rope, a radioactive source limiting rod is installed to limit the position of the radioactive source. The lower end of the radioactive source limiting rod is provided with a bifurcated structure, and the underwater lifting rope passes through the bifurcated structure, and the radioactive source is located below the bifurcated structure.

3. The radioactive source lifting rope safety protection device according to claim 1, characterized in that: ​

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