Radioactive contaminated sludge cleaning device for pits

Abstract

The utility model relates to a pit radioactive contaminated sludge cleaning device, belonging to the technical field of radioactive contaminated wet waste treatment. The device includes a mobile suction trolley for being placed in the pit, and also includes a mobile shielding vehicle for being placed outside the pit. The device is designed with a mobile suction trolley placed in the pit. On the one hand, a long rod is used to drive the mobile suction trolley to move in the pit. On the other hand, a vacuum pump is used to form a negative pressure in the buffer tank, and then the sludge in the pit is sucked into the buffer tank through a sewage suction pipeline and the suction port of the mobile suction trolley. Because a sludge recovery shielding container is arranged below the buffer tank, the sludge can be discharged into the sludge recovery shielding container through the sewage discharge port of the buffer tank. In addition, the mobile shielding vehicle can move synchronously outside the pit as the mobile suction trolley moves in the pit, so that the sludge in the pit can be fully cleaned.

Description

Technical Field

[0001] The utility model relates to a pit radioactive contaminated sludge cleaning device, belonging to the technical field of radioactive contaminated wet waste treatment. Background Art

[0002] In the process of nuclear power technology application, nuclear island ground drainage, process drainage, etc. will precipitate radioactive sludge on the surface after being discharged into the pit. After the nuclear-grade sewage pump cleans the sewage in the pit, it is difficult to completely clean the sludge attached to the surface of the pit. Usually, it is necessary to dive into the pit to complete the cleaning of the radioactive sludge. Such operations have the following problems: (1) The cleaning personnel are in the irradiated environment of the pit, and the risk of radioactive exposure is inevitable; (2) The working environment is poor and the work efficiency is low.

[0003] The Chinese patent with announcement number CN208014384U discloses a device for collecting sludge in a pit of a nuclear power plant. The device only mentions the use of a first pipeline placed in the pit to suck out the sewage, but the pipeline cannot move by itself and requires manual intervention. Therefore, it is still impossible to avoid the cleaning personnel being in a radioactive irradiation environment in the pit, and it affects the efficiency of sucking out the sewage in the pit. Summary of the invention

[0004] The technical problem to be solved by the utility model is: when using a device for cleaning sludge in a pit of a nuclear power plant, the risk of cleaning personnel being irradiated by radioactive substances in the pit is effectively avoided, and the efficiency of sucking sewage in the pit is improved.

[0005] The utility model proposes a technical solution to solve the above technical problems: a pit radioactive contaminated sludge cleaning device, including a mobile suction vehicle for placement in the pit, and a mobile shielding vehicle for placement outside the pit;

[0006] The bottom of the mobile suction trolley is provided with a universal wheel, the platform in the middle of the mobile suction trolley has a hollow channel, one end of the hollow channel forms a suction port facing the sludge, the other end of the hollow channel is provided with a short tube, a support is provided on the platform in the middle of the mobile suction trolley, the support is hinged with a pipe joint with an internal thread, and the pipe joint is screwed with a long rod;

[0007] The mobile shielding vehicle is provided with a shielding box, in which a buffer tank, a vacuum pump and a sludge recovery shielding container are provided, a vacuum pipeline is connected between the buffer tank and the vacuum pump, a sewage suction port is provided on the buffer tank, a sewage suction pipeline is connected between the sewage suction port and the short pipe, the sludge recovery shielding container is located below the buffer tank, an openable shielding cover is provided on the top of the sludge recovery shielding container, the sewage outlet at the bottom of the buffer tank is opposite to the top of the sludge recovery shielding container, and when the shielding cover is opened, the sewage outlet discharges sludge.

[0008] Furthermore, a pair of slide frames are provided at the bottom of the shielding box, and a slide slot is provided on the slide frame. The shielding cover is located between the pair of slide frames, and sliders cooperating with the slide slot are provided on both sides of the shielding cover; when the shielding cover slides back and forth along the slide slot, the top of the sludge recovery shielding container is in two states: closed and open.

[0009] Furthermore, the side wall of the shielding box is opened and provided with a quick connector, a sewage suction hard pipe is connected between the sewage suction port and the quick connector, a sewage suction hard pipe is provided with a sewage suction valve, and a sewage suction hose is connected between the quick connector and the short pipe.

[0010] Furthermore, a liquid level switch is provided on the buffer tank, a sewage outlet at the bottom of the buffer tank is provided with a sewage valve, and the sewage valve is interlocked with the liquid level switch.

[0011] Furthermore, a vacuum gauge is provided on the buffer tank, and the vacuum gauge is automatically linked to the motor of the vacuum pump. When the vacuum gauge measures the vacuum degree in the vacuum pump to be greater than or equal to the set value, the motor of the vacuum pump is stopped, and when the vacuum gauge measures the vacuum degree in the vacuum pump to be less than the set value, the motor of the vacuum pump is started, thereby stabilizing the vacuum degree of the buffer tank.

[0012] Furthermore, the buffer tank is provided with a flushing pipe, one end of which enters the buffer tank and is provided with a nozzle, and the other end of the flushing pipe passes through the side wall of the shielding box and is provided with a joint, which can be connected to an external pressure water source or to the atmosphere, and a water control valve is provided on the flushing pipe.

[0013] Furthermore, a storage bucket and an electric hoist are provided on the outside of the shielding box, and a hook of the electric hoist clamps the sewage suction hose.

[0014] The beneficial effects of the utility model are as follows: due to the design of a mobile suction trolley placed in the pit, on the one hand, the mobile suction trolley is driven to move in the pit by a long rod, and on the other hand, a negative pressure is formed in the buffer tank by a vacuum pump, and then the sludge in the pit is sucked into the buffer tank through the sewage suction pipeline and the suction port of the mobile suction trolley; and because a sludge recovery shielding container is arranged below the buffer tank, the sludge can be discharged into the sludge recovery shielding container through the sewage discharge port of the buffer tank. In addition, the mobile shielding vehicle can move synchronously outside the pit as the mobile suction trolley moves in the pit, so that the sludge in the pit can be fully cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The radioactive contaminated sludge cleaning device for pits of the utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 The utility model is a schematic diagram of the structure of a pit radioactive contaminated sludge cleaning device and a pit according to an embodiment of the utility model.

[0017] Figure 2 is from Figure 1 Schematic diagram of the structure of the mobile suction trolley split in half.

[0018] Figure 3 yes Figure 2 A partial cross-sectional view of .

[0019] Figure 4 is from Figure 1 Schematic diagram of the three-dimensional structure of the radioactive contaminated sludge cleaning device in the Zhongdi pit.

[0020] Figure 5 is from Figure 1 Schematic diagram of the structure of the split sludge recovery shielding container.

[0021] Figure 6 is from Figure 1 Schematic diagram of the structure of the split electric hoist. DETAILED DESCRIPTION Example

[0022] The pit radioactive contaminated sludge cleaning device of this embodiment is as follows: Figure 1 As shown, it includes a mobile suction vehicle 1 for being placed in a pit, and also includes a mobile shielding vehicle 100 for being placed outside the pit.

[0023] like Figure 2 and Figure 3 As shown, a universal wheel 1-1 is provided at the bottom of the mobile suction trolley 1, a platform in the middle of the mobile suction trolley 1 has a hollow channel 1-4, one end of the hollow channel 1-4 forms a suction port 1-3 facing the sludge, and the other end of the hollow channel 1-4 is provided with a short pipe 1-5, and a support 1-2 is provided on the platform in the middle of the mobile suction trolley 1, and the support 1-2 is hinged with a pipe joint 1-6 with an internal thread, as shown in FIG. Figure 1 As shown, the pipe joint 1-6 is screwed with a long rod 2. The long rod 2 can be a fixed rod or a telescopic rod, preferably a relatively long length, so that a person can hold one end of the long rod 2 remotely to drive the mobile suction trolley 1 to move in the pit.

[0024] like Figure 1 and Figure 4As shown, the mobile shielding vehicle 100 is a trolley, and a shielding box 8 is provided on the mobile shielding vehicle 100, and a buffer tank 16, a vacuum pump 13 and a sludge recovery shielding container 6 are provided in the shielding box 8. A vacuum pipeline is connected between the buffer tank 16 and the vacuum pump 13, and a sewage suction port is provided on the buffer tank 16. A sewage suction pipeline is connected between the sewage suction port and the short pipe. Specifically, in this embodiment, the side wall of the shielding box 8 is opened and provided with a quick connector 5, and the sewage suction pipeline is divided into two sections, namely, a sewage suction hard pipe and a sewage suction hose, wherein a sewage suction hard pipe is connected between the sewage suction port and the quick connector, a sewage suction valve 10 is provided on the sewage suction hard pipe, and a sewage suction hose 3 is connected between the quick connector 5 and the short pipe 1-5. The sludge recovery shielding container 6 is located below the buffer tank 16.

[0025] like Figure 5 As shown, the top of the sludge recovery shielding container 6 is provided with an openable shielding cover 6-1. Figure 1 As shown, the drain outlet at the bottom of the buffer tank 16 faces downwards and directly toward the top of the sludge recovery shielding container 6. A drain valve 7 is provided on the drain outlet at the bottom of the buffer tank 16. When the shielding cover 6-1 is opened, the drain outlet discharges sludge. Figure 1 and Figure 5 As shown, a pair of chute frames 6-3 are provided at the bottom of the shielding box 8, and a chute is provided on the chute frame 6-3. The shielding cover 6-1 is located between the pair of chute frames 6-3. Slide blocks cooperating with the chute are provided on both sides of the shielding cover 6-1, so that the shielding cover can slide back and forth along the chute; when the shielding cover 6-1 slides back and forth along the chute, the top of the sludge recovery shielding container 6 is in two states of cover and opening. When the top of the sludge recovery shielding container 6 is in the open state, the sewage outlet at the bottom of the buffer tank 16 can discharge sludge into the sludge recovery shielding container 6; when the top of the sludge recovery shielding container 6 is in the cover state, the sewage outlet at the bottom of the buffer tank 16 stops discharging sludge. In addition, a liquid level switch 16-1 and a liquid level meter 16-3 (alarm for excessive sludge level in the buffer tank 16) are provided on the buffer tank 16, and the sewage valve 7 is interlocked with the liquid level switch 16-1. A vacuum gauge 16-2 is provided on the buffer tank 16, and the vacuum gauge 16-2 is automatically linked to the motor of the vacuum pump 13. When the vacuum gauge measures the vacuum degree in the vacuum pump to be greater than or equal to the set value, the motor of the vacuum pump can be stopped. When the vacuum gauge measures the vacuum degree in the vacuum pump to be less than the set value, the motor of the vacuum pump can be started, thereby stabilizing the vacuum degree of the buffer tank.

[0026] like Figure 1 As shown, the buffer tank 16 is provided with a flushing pipe, one end of which enters the buffer tank 16 and is provided with a nozzle 9, and the other end of the flushing pipe passes through the side wall of the shielding box 8 and is provided with a joint 11, which can be connected to an external pressure water source or connected to the atmosphere, and the flushing pipe is provided with a control valve 12 and a one-way valve 12-1 (to prevent the radioactive gas inside the buffer tank 16 from escaping into the environment).

[0027] like Figure 1 and Figure 6 As shown, an electric hoist 4 is provided outside the shielding box 8, and a hook 4-1 of the electric hoist 4 clamps the sewage suction hose 3. Figure 1 As shown, the storage bucket 15 outside the shielding box 8 can be used to store the sewage suction hose 3 and the mobile suction trolley.

[0028] like Figure 1 and Figure 4 As shown, the negative pressure pipeline from the vacuum pump 13 to the buffer tank 16 is composed of a gas-water separator 17, a high-efficiency filter 18, and a check valve 19 connected in series, which is connected from the buffer tank 16 to the inlet of the vacuum pump 13, and the outlet of the vacuum pump 13 introduces the exhaust gas into the pit through the exhaust hose 14, wherein a drainage pipeline is provided at the bottom of the gas-water separator 17 and is introduced into the buffer tank 16 through an electric drainage valve 20.

[0029] like Figure 1 As shown, an electrical controller 21 is also provided in the shielding box 8 .

[0030] The use process of the pit radioactive contaminated sludge cleaning device of this embodiment is as follows:

[0031] Step 1: Get ready

[0032] The mobile suction vehicle 1 is placed in the pit using the long pole 2 and the electric hoist 4, and then the shielding box 8 and the shielding cover 6 - 3 are opened, the sludge collection bag is placed in the sludge collection shielding container 6 - 2, and then the shielding box 8 is closed.

[0033] Step 2: Stabilize negative pressure

[0034] Start the vacuum pump 13, and the vacuum gauge 16-1 above the buffer tank 16 is automatically linked with the motor of the vacuum pump 13, thereby stabilizing the vacuum degree of the buffer tank.

[0035] Step 3: Pumping out the sludge

[0036] Open the sewage suction valve 10, and the sludge on the surface of the pit is sucked into the buffer tank 16 through the suction port 1-3---hollow channel 1-4---short pipe 1---sewage suction hose 3---quick connector 4---sewage suction hard pipe and sewage suction valve 10 of the mobile suction trolley 1 under negative pressure. At this time, the cleaning personnel can drive the mobile suction trolley 1 to move in the pit by holding the long pole 2. When the sewage suction hose 3 is long enough, the mobile shielding vehicle 100 can remain stationary. If the sewage suction hose 3 is not long enough, the mobile shielding vehicle 100 can be pushed by hand outside the pit at the same time as the mobile suction trolley 1 moves in the pit, so as to completely clean the sludge on the surface of the pit.

[0037] Step 4: Sludge Collection

[0038] The electric drain valve 7 below the buffer tank 16 is interlocked with the liquid level switch 16-3 of the buffer tank 16. When the liquid level reaches the set parameter, the vacuum pump 13 is closed, and then the control valve 12 on the pipeline is flushed. At this time, the connector 11 is not connected to an external pressure water source but is connected to the atmosphere, and the buffer tank 16 enters the air (breaking the air). Then the drain valve 7 is opened, and the sludge is discharged from the drain port at the bottom of the buffer tank 16 into the sludge collection bag of the sludge collection shielding container 6-2.

[0039] Step 5: Shielding Transshipment

[0040] Open the shielding box 8 and push the shielding cover 6-3 to the closed position to complete the shielding and sealing storage of the radioactive contaminated sludge. Then, the mobile suction trolley 1 and the suction hose 3 are recovered into the hose storage box 15 through the electric hoist 4, and the shielding box 8 is closed. Then, the trolley mobile shielding trolley 100 is pushed to the designated position to implement the transportation and subsequent treatment of the radioactive contaminated sludge.

[0041] Step 6: Flushing the buffer tank

[0042] Open the drain valve 7 at the bottom of the buffer tank 16, and connect a hose to the sewage collection pit, connect the connector 11 to an external pressure water source (such as tap water, etc.), open the control valve 12 on the flushing pipeline, and flush the inside of the buffer tank 16 through the nozzle 9.

[0043] The present invention is not limited to the above-mentioned embodiments, and any technical solutions formed by equivalent replacement shall fall within the protection scope required by the present invention.

Claims

1. A device for cleaning radioactive contaminated sludge in a pit, characterized in that : including a mobile suction trolley for placement in the pit, and also including a mobile shielding trolley for placement outside the pit; The bottom of the mobile suction trolley is provided with a universal wheel, the platform in the middle of the mobile suction trolley has a hollow channel, one end of the hollow channel forms a suction port facing the sludge, the other end of the hollow channel is provided with a short tube, a support is provided on the platform in the middle of the mobile suction trolley, the support is hinged with a pipe joint with an internal thread, and the pipe joint is screwed with a long rod; The mobile shielding vehicle is provided with a shielding box, in which a buffer tank, a vacuum pump and a sludge recovery shielding container are provided, a vacuum pipeline is connected between the buffer tank and the vacuum pump, a sewage suction port is provided on the buffer tank, a sewage suction pipeline is connected between the sewage suction port and the short pipe, the sludge recovery shielding container is located below the buffer tank, an openable shielding cover is provided on the top of the sludge recovery shielding container, the sewage outlet at the bottom of the buffer tank is opposite to the top of the sludge recovery shielding container, and when the shielding cover is opened, the sewage outlet discharges sludge.

2. The device according to claim 1, characterized in that: A pair of slide frames are provided at the bottom of the shielding box, and slide slots are provided on the slide frames. The shielding cover is located between the pair of slide frames, and sliders cooperating with the slide slots are provided on both sides of the shielding cover. When the shielding cover slides back and forth along the slide slots, the top of the sludge recovery shielding container is in two states: closed and open.

3. The device according to claim 1, characterized in that: The side wall of the shielding box is opened and provided with a quick connector, a sewage suction hard pipe is connected between the sewage suction port and the quick connector, a sewage suction hard pipe is provided with a sewage suction valve, and a sewage suction hose is connected between the quick connector and the short pipe.

4. The device according to claim 1, characterized in that: The buffer tank is provided with a liquid level switch, and the sewage outlet at the bottom of the buffer tank is provided with a sewage valve, and the sewage valve is interlocked with the liquid level switch.

5. The device according to claim 1, characterized in that: The buffer tank is provided with a vacuum gauge, which is automatically linked to the motor of the vacuum pump; when the vacuum gauge measures the vacuum degree in the vacuum pump to be greater than or equal to a set value, the motor of the vacuum pump is stopped; when the vacuum gauge measures the vacuum degree in the vacuum pump to be less than the set value, the motor of the vacuum pump is started.

6. The device according to claim 1, characterized in that: The buffer tank is provided with a flushing pipe, one end of which enters the buffer tank and is provided with a nozzle, and the other end of the flushing pipe passes through the side wall of the shielding box and is provided with a joint, which can be connected to an external pressure water source or to the atmosphere. A water control valve is provided on the flushing pipe.

7. The device according to claim 3, characterized in that: A storage bucket and an electric hoist are arranged on the outer side of the shielding box, and a hook of the electric hoist clamps the sewage suction hose.

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