Active toxic wastewater pipeline

Abstract

The invention discloses an active toxic wastewater pipeline, comprising: an inner pipe for circulation of active toxic wastewater; the at least one outer pipe is sleeved outside the inner pipe, and a closed space is formed between the inner pipe and the outer pipe; wherein at least one pressure detection device is arranged in the closed space, the closed space is filled with gas, and the pressure of the gas is larger than 0.1 MPa; and the control device is used for collecting the pressure data of the pressure detection device in real time and sending out an alarm signal when the pressure data is abnormal. The outer pipe is arranged at the welding seam, the valve or the pipe fitting of the pipeline, so that the closed space is formed outside the inner pipe at the position, and the purpose of monitoring whether the active toxic wastewater in the inner pipe leaks or not is achieved by monitoring the pressure of the gas in the closed space.

Description

Technical Field

[0001] The invention relates to the field of biosafety, and in particular to a live poison wastewater pipeline. Background Art

[0002] The drainage from biosafety experiments is called live toxic wastewater, which refers to hazardous wastewater contaminated by harmful biological factors.

[0003] According to the "Technical Specifications for Biosafety Laboratory Buildings" GB50346-2011, biosafety laboratories are divided into levels one to four, with the fourth level being the highest level, which refers to high individual hazards and high group hazards, that is, highly harmful to humans, animals, plants or the environment, transmitted through aerosols or with unknown transmission routes, or unknown, highly dangerous pathogenic factors, and no prevention and treatment measures. For example: Ebola, Lassa fever, Crimean Congo hemorrhagic fever, etc. are studied in level four biosafety laboratories, anthrax Bacillus, plague bacillus, Mycobacterium tuberculosis, rabies virus, etc. are studied in level three biosafety laboratories, and the new coronavirus that is raging around the world is studied in level two biosafety laboratories. Therefore, the drainage of high-level biosafety laboratories, especially, has highly dangerous pathogenic factors. In the design and construction of laboratories, the collection system of live poison wastewater must be strict and reliable.

[0004] There are currently two types of live poison wastewater pipes commonly used internationally. One type is single-layer pipes. Large animal level 4 biosafety laboratories usually use single-layer pipes. Through visits and surveys, it was found that single-layer pipes have dripping phenomena at valves and joints; the second type is double-layer pipes. Laboratories using double-layer pipes usually have simple drainage properties, few drainage points, and currently only double-layer pipes are designed in straight pipe sections, and there are no leak detection measures.

[0005] Biosafety is national security, so the development of safe, reliable and intelligent live poison wastewater pipelines for application in large animal Level 4 biosafety laboratories is an urgent task. It is also the difficulty and key point in the construction of such laboratories in my country. Breaking through the barriers will provide strong support for the construction of such laboratories in my country. Summary of the invention

[0006] The main purpose of the present invention is to provide a live poison wastewater pipeline to monitor the tightness of the pipeline in real time and prevent the live poison wastewater from leaking out.

[0007] In order to achieve the above object, the present invention provides a live poison wastewater pipeline, comprising:

[0008] The inner pipe is used for the circulation of live poison wastewater;

[0009] At least one outer tube is sleeved outside the inner tube, and a closed space is formed between the inner tube and the outer tube; wherein at least one pressure detection device is arranged in the closed space, and the closed space is filled with gas, and the pressure of the gas is greater than 0.1 MPa;

[0010] The control device is used to collect the pressure data of the pressure detection device in real time, and send out an alarm signal when the pressure data is abnormal.

[0011] In one embodiment of the live poison wastewater pipeline described in the present invention, a plurality of pressure detection devices are arranged in the enclosed space, and the pressure detection devices are arranged at the welds, valves or pipe fittings of the inner pipe. When the pressure data is abnormal, the position of the pressure detection device that detects the abnormal pressure data is determined, and an alarm signal is issued.

[0012] In one embodiment of the live poison wastewater pipeline described in the present invention, the inner pipe has a weld, and the outer pipe is sleeved at the weld of the inner pipe to form a double-layer sleeve structure only at the weld to monitor the tightness of the weld.

[0013] In one embodiment of the active poison wastewater pipeline described in the present invention, the inner tube has multiple welds, and the active poison wastewater pipeline includes multiple outer tubes, which are respectively sleeved on the multiple welds of the inner tube to monitor the tightness of each weld respectively.

[0014] In one embodiment of the live poison wastewater pipeline described in the present invention, the inner tube has pipe fittings and / or valves, and the outer tube is sleeved on the pipe fittings and / or valves of the inner tube to form a closed leak detection box only outside the pipe fittings and / or valves to monitor the tightness of the pipe fittings and / or valves.

[0015] In one embodiment of the live poison wastewater pipeline described in the present invention, the inner tube has multiple pipe fittings and / or valves, and the live poison wastewater pipeline includes multiple outer tubes, and the multiple outer tubes are respectively sleeved on the multiple pipe fittings and / or valves of the inner tube to form multiple closed leak detection boxes to monitor the tightness of each pipe fitting and / or valve respectively.

[0016] In one embodiment of the active poison wastewater pipeline of the present invention, the inner pipe has a pipeline water trap, and an ultrasonic liquid level detection device is provided at the pipeline water trap to detect the water level at the pipeline water trap;

[0017] The control device is used to collect water level data of the ultrasonic liquid level detection device in real time. When the water level at the water trap of the pipeline is lower than the free water level line for a certain period of time, the control device sends out an alarm signal.

[0018] In one embodiment of the active poison wastewater pipeline of the present invention, a pneumatic sealed ball valve is further provided at the end of the inner tube, and the control device monitors the opening and closing status of the pneumatic sealed ball valve in real time.

[0019] In one embodiment of the live poison wastewater pipeline described in the present invention, the outer tube includes an outer sleeve and a side cover plate, the outer sleeve and the side cover plate are welded, and a sealing element is provided between the side cover plate and the inner tube to form a closed space between the inner tube and the outer tube.

[0020] In one embodiment of the active poison wastewater pipeline of the present invention, the pressure of the gas filled in the closed space formed between the inner tube and the outer tube is 0.3MPa to 0.5MPa.

[0021] Beneficial effects of the present invention:

[0022] The present invention arranges an outer tube at the weld, valve or pipe fitting of the pipeline to form a closed space outside the inner tube at these positions, and then monitors the pressure of the gas in the closed space to achieve the purpose of monitoring whether the active toxic wastewater in the inner tube is leaking.

[0023] In addition, in the present invention, closed spaces are provided outside the locations prone to leakage, such as the welds of the inner pipe, valves or pipe fittings, so as to prevent further leakage of the active poison wastewater and avoid biosafety problems.

[0024] Furthermore, the active poison wastewater pipeline of the present invention monitors the pipeline in real time through the control device, and can determine the leakage location and send out an alarm signal when an abnormality occurs, thereby realizing full automatic control. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A perspective view of a live poison wastewater pipeline according to an embodiment of the present invention;

[0026] Figure 2 This is an enlarged cross-sectional view of a weld of a live toxic wastewater pipeline according to an embodiment of the present invention;

[0027] Figure 3 A side view of a sealing structure of a live poison wastewater pipeline according to an embodiment of the present invention;

[0028] Figure 4 for Figure 3 Sectional view at 1-1;

[0029] Figure 5 It is an enlarged cross-sectional view of a pipe fitting for a live poison wastewater pipeline according to an embodiment of the present invention;

[0030] Figure 6 This is an enlarged cross-sectional view of a water trap of a live poison wastewater pipeline according to one embodiment of the present invention.

[0031] Wherein, the reference numerals are:

[0032] 1 Inner tube

[0033] 11 Weld

[0034] 12 Pipe fittings

[0035] 13. Valve

[0036] 21 outer tube

[0037] 211 Outer sleeve

[0038] 212 Side cover

[0039] 213 Confined Space

[0040] 214 Pressure detection device

[0041] 215 Gas Inlet

[0042] 216 Sealing element

[0043] 2161 Middle Gap

[0044] 217 Sealing element sleeve

[0045] 22 Sealed leak detection box

[0046] 221 Pressure detection device

[0047] 222 Gas inlet

[0048] 223 Confined Space

[0049] 4 Pipe trap

[0050] 41 Ultrasonic liquid level detection device

[0051] 42 Free water level

[0052] 43 Clamp

[0053] 100 Live Toxin Wastewater Pipeline Layer

[0054] 200 Live Toxin Wastewater Treatment Room DETAILED DESCRIPTION

[0055] The technical scheme of the present invention is described in detail below. The following implementation modes are implemented on the premise of the technical scheme of the present invention, and a detailed implementation process is given. However, the protection scope of the present invention is not limited to the following implementation modes. The structures or experimental methods of specific conditions are not specified in the following implementation modes, and generally conventional conditions are followed.

[0056] The present invention provides a live poison wastewater pipeline, such as Figure 1 As shown, the live poison wastewater pipeline of the present invention is used to transport live poison wastewater, and can be arranged in the live poison wastewater pipeline layer 100, and part of the pipeline is arranged in the live poison wastewater treatment room 200. The live poison wastewater pipeline of the present invention includes an inner pipe 1, at least one outer pipe and a control device.

[0057] The inner tube 1 is used for circulating the live poison wastewater. At least one outer tube is sleeved outside the inner tube 1, and a closed space is formed between the inner tube 1 and the outer tube; wherein at least one pressure detection device is arranged in the closed space, and the closed space is filled with gas, and the pressure of the gas is greater than 0.1MPa. The control device is used to collect the pressure data of the pressure detection device in real time, and send out an alarm signal when the pressure data is abnormal.

[0058] In one embodiment, the live poison wastewater pipeline of the present invention includes an outer tube, which is sleeved outside the inner tube 1, that is, the entire inner tube 1 is wrapped by the outer tube, and the entire live poison wastewater pipeline forms a double-layer sleeve structure in which the outer tube is sleeved outside the inner tube. A plurality of pressure detection devices are arranged in the confined space. The inner tube 1 has welds, valves, pipe fittings, etc. The pressure detection device is arranged at the welds, valves or pipe fittings of the inner tube 1. When the pressure data collected by the control device is abnormal, the control device determines the position of the pressure detection device that detects the abnormal pressure data and sends an alarm signal. Among them, the pressure data is abnormal, for example, the pressure data is lower than the pressure of the gas filled in the confined space, that is, the gas leaks.

[0059] Specifically, the confined space is in a slightly positive pressure state. Once the inner tube leaks, the gas in the confined space will flow into the inner tube, and the pressure in the confined space will drop sharply to normal pressure (standard 101.325KPa). At this time, the control device collects the pressure detection device such as a pressure sensor to obtain abnormal pressure data, and then determines the position of the pressure detection device that detects the abnormal pressure data, and sends an alarm signal. Therefore, the active poison wastewater pipeline of the present invention can realize the leakage alarm of the pipeline and prevent leakage to the external space.

[0060] The present invention is not limited to the entire inner tube 1 being sheathed by the outer tube, that is, only part of the inner tube 1 may be sheathed by the outer tube, and part of the inner tube 1 may be exposed. Similarly, the present invention is not limited to only one outer tube, and multiple outer tubes may be provided, respectively sheathed at different positions of the inner tube 1. In one embodiment, the inner tube 1 has welds, valves, pipe fittings, etc., which are prone to leakage, so the outer tube is sheathed at these places of the inner tube 1.

[0061] In one embodiment, if Figure 1 As shown, the inner tube 1 has a weld 11, and the outer tube 21 is sleeved on the weld 11 of the inner tube 1 to form a double-layer sleeve structure only at the weld 11 to monitor the tightness of the weld 11. Figure 1 The inner tube section has three welds 11, and three outer tubes 21 can be provided, which are respectively sleeved outside the welds 11.

[0062] Please also see Figure 2 , Figure 2This is an enlarged cross-sectional view of the weld of the active toxin wastewater pipeline of the present invention. The outer tube 21 includes an outer sleeve 211 and a side cover plate 212. The outer sleeve 211 is a tubular structure. The side cover plates 212 are arranged at both ends of the outer sleeve. The outer sleeve 211 and the side cover plates 212 are connected by welding, for example, so that a closed space 213 is formed between the inner tube 1 and the outer tube 21.

[0063] In one embodiment, the outer tube 21 is further provided with a pressure detection device 214 for detecting the gas pressure of the enclosed space 213. In another embodiment, the outer tube 21 is further provided with a gas inlet 215 for filling the enclosed space 213 with gas. The gas inlet 215 can be rebound sealed after being filled with gas, for example, to prevent gas leakage. The present invention does not particularly limit the type of gas, such as nitrogen, carbon dioxide, argon, etc. The present invention also does not particularly limit the pressure of the gas filled in the enclosed space 213, for example, 0.3MPa to 0.5MPa.

[0064] In one embodiment, the side cover plate 212 is connected to the inner tube 1 via a sealing structure to ensure the sealing of the enclosed space 213 .

[0065] In another embodiment, the sealing structure is as Figure 3 and Figure 4 As shown, Figure 3 It is a side view of the sealing structure of the active poison wastewater pipeline of the present invention, Figure 4 for Figure 3 The sealing structure includes a sealing element 216 and a sealing element sleeve 217. The sealing element 216 is an annular structure, which is sleeved between the inner tube 1 and the side cover plate 212 of the outer tube 21 to seal the gap between the inner tube 1 and the side cover plate 212 of the outer tube 21. In one embodiment, the annular structure of the sealing element 216 has a middle gap 2161, that is, the annular structure has an opening, so that the sealing element 216 can be conveniently sleeved outside the inner tube 1. The middle gap 2161 can be compressed and closed by a clamping bolt.

[0066] The sealing element sleeve 217 is also an annular structure, which is sleeved outside the sealing element 216, and the sealing element sleeve 217 is connected to the side cover plate 212, for example, by welding. The present invention increases the contact area between the side cover plate 212 and the sealing structure by setting the sealing element sleeve 217, thereby improving the bonding strength between the sealing structure and the outer tube 21.

[0067] In one embodiment, the above-mentioned sealing structure may also be provided at the connection between the pressure detection device 214 and the outer tube 21 and at the gas inlet 215 .

[0068] In one embodiment, the inner tube 1 of the present invention has a plurality of welds 11, and the live poison wastewater pipeline includes a plurality of outer tubes 21, and the plurality of outer tubes 21 are respectively sleeved on the plurality of welds 11 of the inner tube 1 to respectively monitor the tightness of each weld 11. Moreover, when live poison wastewater leaks at the weld 11, the outer tube 21 can prevent the live poison wastewater from further leaking, thereby avoiding the occurrence of biosafety problems.

[0069] In one embodiment, if Figure 1 As shown, the inner tube 1 has a pipe fitting 12 and / or a valve 13, and the outer tube is sleeved on the pipe fitting 12 and / or the valve 13 of the inner tube 1 to form a closed leak detection box only outside the pipe fitting 12 and / or the valve 13 to monitor the tightness of the pipe fitting 12 and / or the valve 13.

[0070] Please also see Figure 5 , Figure 5 It is an enlarged cross-sectional view of the pipe fitting of the active poison wastewater pipeline of the present invention. The closed leak detection box 22 is, for example, a box-type structure that wraps the inner pipe fitting 12, and a closed space 223 is formed between the closed leak detection box 22 and the inner pipe. In one embodiment, a sealing structure is provided at the connection between the closed leak detection box 22 and the inner pipe 1 to ensure the sealing of the closed space 223. The sealing structure has been described in detail above and will not be repeated here.

[0071] In one embodiment, the sealed leak detection box 22 is also provided with a pressure detection device 221 for detecting the gas pressure of the closed space 223. In another embodiment, the sealed leak detection box 22 is also provided with a gas inlet 222 for filling the closed space 223 with gas. The gas inlet 222 can rebound and seal after being filled with gas to prevent gas leakage. The present invention does not particularly limit the type of gas, such as nitrogen, carbon dioxide, argon, etc. The present invention also does not particularly limit the pressure of the gas filled in the closed space 223, for example, 0.3MPa to 0.5MPa.

[0072] In one embodiment, the above-mentioned sealing structure may also be provided at the connection between the pressure detection device 221 and the sealed leak detection box 22 and at the gas inlet 222 .

[0073] In one embodiment, the inner tube 1 of the present invention has a plurality of pipe fittings 12 and / or valves 13, and the live poison wastewater pipeline includes a plurality of sealed leak detection boxes 22, and the plurality of sealed leak detection boxes 22 are respectively sleeved outside the plurality of pipe fittings 12 and / or valves 13 of the inner tube 1 to respectively monitor the tightness of each pipe fitting 12 and / or valve 13. In addition, when live poison wastewater leaks at the pipe fitting 12 and / or valve 13, the sealed leak detection box 22 can prevent the live poison wastewater from further leaking, thereby avoiding the occurrence of biosafety problems.

[0074] In one embodiment, the inner pipe 1 of the present invention has a pipe trap 4 , and an ultrasonic liquid level detection device 41 is provided at the pipe trap 4 for detecting the water level at the pipe trap 4 .

[0075] Please also see Figure 6 , Figure 6 It is an enlarged cross-sectional view of the pipe trap of the live poison wastewater pipeline of the present invention. The pipe trap 4 is, for example, an S-shaped pipe, specifically, a lying S-shaped pipe, which is cast in one piece. The pipe trap 4 has a free water level line 42, and the free water level line 42 is the highest line of the liquid when the pipe trap 4 returns to a calm state after the liquid passes through it. The ultrasonic liquid level detection device 41 is arranged below the free water level line 42, and is used to detect the water level in the pipe trap. The control device is used to collect the water level data of the ultrasonic liquid level detection device 41 in real time. When the water level at the pipe trap 4 is lower than the free water level line for a certain period of time, the control device sends an alarm signal. The present invention does not specifically limit the certain time, for example, 1-60s.

[0076] The present invention does not particularly limit the arrangement of the ultrasonic liquid level detection device 41 , for example, it can be fixed to the pipe trap 4 via a clamp 43 .

[0077] Among them, the ultrasonic liquid level detection device 41 uses the ultrasonic interface reflection principle to detect whether there is liquid in the water seal position. The ultrasonic transducer on the ultrasonic liquid level detection device 41 will emit a group of high-frequency sound waves, generally 40-45kHz. When the ultrasonic wave passes through the pipe wall and reaches the interface between stainless steel and other media, part of the ultrasonic wave continues to propagate, and part is reflected. The reflected ultrasonic wave is received by the sensor. There is a clear difference between the vibration amplitude of the reflected pulse of the ultrasonic wave at the steel-water interface and the steel-air interface. The reflectivity of the steel-air interface is much greater than that of the steel-water interface. Based on this characteristic of the ultrasonic wave, it can be tested whether there is liquid in the pipeline. In one embodiment, the waveform can be compared. When the peak becomes higher, the control device sends a water replenishment signal to control the water replenishment pipeline to replenish water.

[0078] In one embodiment, a pneumatic sealed ball valve is also provided at the end of the inner tube 1 of the present invention, and the control device monitors the opening and closing state of the pneumatic sealed ball valve in real time to detect whether the active poison wastewater pipeline is leaking. In addition, the control device can also remotely control the opening and closing of the solenoid valve corresponding to the pneumatic ball valve in the valve island box of the pneumatic sealed ball valve.

[0079] The present invention does not particularly limit the material of the live toxic wastewater pipeline. For example, it is made of 316L stainless steel thick-walled pipe, argon arc welding, and all welds are subjected to nondestructive testing. The present invention does not particularly limit the method of nondestructive testing. Generally, X-ray (X-RAY) flaw detection is used for pipeline inspection, and the rays penetrate the object to find the internal defects of the object to check whether the internal quality of the pipeline weld is qualified. Among them, X-rays can make film sensitive or excite certain materials to emit fluorescence. The rays attenuate according to a certain rule in the process of penetrating the object. The relationship between the attenuation degree and the sensitivity of the rays or the excitation of fluorescence can be used to check the defects inside the object.

[0080] The present invention arranges an outer tube at the weld, valve or pipe fitting of the pipeline to form a closed space outside the inner tube at these positions, and then monitors the pressure of the gas in the closed space to achieve the purpose of monitoring whether the live poison wastewater in the inner tube is leaking. In addition, the closed space is arranged outside the weld, valve or pipe fitting of the inner tube of the present invention, which is easy to leak, so as to prevent the live poison wastewater from further leaking and avoid biosafety problems. Furthermore, the live poison wastewater pipeline of the present invention monitors the pipeline in real time through a control device, and can determine the leakage position when an abnormality occurs, send out an alarm signal, and realize full automatic control.

[0081] The live toxic wastewater pipeline system of the present invention can be monitored online in real time, leaked on-site, automatically collected for data analysis, risk location, automatic alarm, and intelligent operation and maintenance management, thereby controlling the risk of leakage of live toxic wastewater to the greatest extent and safeguarding laboratory operation and maintenance.

[0082] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims of the present invention.

Claims

1. A live poison wastewater pipeline, characterized in that: include: The inner pipe is used for the circulation of live poison wastewater; At least one outer tube is sleeved outside the inner tube, and a closed space is formed between the inner tube and the outer tube; wherein at least one pressure detection device is arranged in the closed space, and the closed space is filled with gas, and the pressure of the gas is greater than 0.1 MPa; The control device is used to collect the pressure data of the pressure detection device in real time, and send out an alarm signal when the pressure data is abnormal.

2. The active poison wastewater pipeline according to claim 1 is characterized in that: A plurality of pressure detection devices are arranged in the enclosed space, and the pressure detection devices are arranged at the welds, valves or pipe fittings of the inner tube. When the pressure data is abnormal, the position of the pressure detection device that detects the abnormal pressure data is determined and an alarm signal is issued.

3. The active poison wastewater pipeline according to claim 1 is characterized in that: The inner tube has a weld, and the outer tube is sleeved on the weld of the inner tube to form a double-layer sleeve structure only at the weld to monitor the tightness of the weld.

4. The active poison wastewater pipeline according to claim 3 is characterized in that: The inner tube has a plurality of welds, and the active poison wastewater pipeline includes a plurality of outer tubes, which are respectively sleeved on the plurality of welds of the inner tube to monitor the tightness of each weld respectively.

5. The active poison wastewater pipeline according to claim 1 is characterized in that: The inner tube has pipe fittings and / or valves, and the outer tube is sleeved on the pipe fittings and / or valves of the inner tube to form a closed leak detection box only outside the pipe fittings and / or valves to monitor the tightness of the pipe fittings and / or valves.

6. The active poison wastewater pipeline according to claim 5 is characterized in that: The inner tube has multiple pipe fittings and / or valves, and the active poison wastewater pipeline includes multiple outer tubes, which are respectively sleeved on the multiple pipe fittings and / or valves of the inner tube to form multiple closed leak detection boxes to monitor the tightness of each pipe fitting and / or valve respectively.

7. The active poison wastewater pipeline according to claim 1 is characterized in that: The inner tube has a pipe trap, and an ultrasonic liquid level detection device is provided at the pipe trap for detecting the water level at the pipe trap; The control device is used to collect water level data of the ultrasonic liquid level detection device in real time. When the water level at the water trap of the pipeline is lower than the free water level line for a certain period of time, the control device sends out an alarm signal.

8. The active poison wastewater pipeline according to claim 1 is characterized in that: A pneumatic sealed ball valve is also provided at the end of the inner tube, and the control device monitors the opening and closing state of the pneumatic sealed ball valve in real time.

9. The active poison wastewater pipeline according to claim 1, characterized in that: The outer tube comprises an outer sleeve and a side cover plate, the outer sleeve and the side cover plate are welded, and a sealing element is arranged between the side cover plate and the inner tube to form a closed space between the inner tube and the outer tube.

10. The active poison wastewater pipeline according to claim 1, characterized in that: The pressure of the gas filled into the closed space formed between the inner tube and the outer tube is 0.3 MPa to 0.5 MPa.

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