Open sampling head with cooling function
By introducing a cooling chamber and cooling medium into the open sampling head, the fire accident problem caused by high material temperature during the sampling process is solved, and efficient cooling and safety guarantees for the sampled substances are achieved.
Patent Information
- Application Number
- CN202420770037.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-04-12
AI Technical Summary
When collecting suspended particulate matter in flue gas or water samples in flowing water, some temporary samples are not added to the sampler, resulting in high material temperature, prone to vaporization and fire accidents, threatening people's lives and health.
An open sampling head with cooling function is designed, including a sampling tube, a cooling chamber and a cooling chamber. By setting a cooling chamber outside the sampling head, adding a cooling medium, such as liquid nitrogen, to achieve heat exchange and cooling of the sampling substance.
Through heat exchange of cooling medium, efficient cooling can be achieved, fire accidents can be prevented and people's lives and health can be protected.
Smart Images
Figure CN222882356U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an open sampling head with a cooling function, belonging to the technical field of sampling heads. Background Art
[0002] Isokinetic sampling head is also called isodynamic sampling. When collecting suspended particles in airflow or water samples in flowing water, in order to make the collected samples representative, the airflow or water flow velocity entering the sampler must be the same as the airflow or water flow velocity near the sampling point. In this way, the concentration of suspended particles or the components in the water sample collected can be completely consistent with the actual airflow or water flow. It is often used to collect suspended particles (dust particles) in flue gas and water samples in flowing water. Isokinetic sampling heads are generally used for sampling dust particles to ensure that there is no aspiration and loss in the airflow.
[0003] Due to process requirements, some temporary samples are not equipped with samplers, and the temperature of the open sample material is high, and the material is vaporized. Especially in summer, fire and other safety accidents are more likely to occur, endangering the life and health of people. Utility Model Content
[0004] The utility model aims to provide an open sampling head with a cooling function to cool the material in the open sampling head in view of the above-mentioned problems.
[0005] The technical solution adopted by the utility model is as follows:
[0006] An open sampling head with a cooling function comprises a sampling tube, a connecting portion is arranged at the rear end of the sampling tube, a cooling bin is sleeved in the middle of the sampling tube, a cooling chamber is provided in the cooling bin for loading a cooling medium, and the sampling tube passes through the cooling chamber.
[0007] Optionally, the connecting portion is a connecting flange.
[0008] Optionally, a first switch valve is provided at the front end of the sampling tube.
[0009] Optionally, the first switch valve is a first needle ball valve
[0010] Optionally, the sampling tube has a spiral section, and the spiral section is arranged in the cooling chamber.
[0011] Optionally, the cooling bin is provided with a filling port.
[0012] Optionally, the filling port is arranged on a side wall of the cooling bin, the filling port is connected to a filling pipe, and the filling pipe is provided with a second switch valve.
[0013] Optionally, the front end of the sampling tube is provided with an elbow.
[0014] Optionally, the cooling bin is also provided with a pressure gauge
[0015] Optionally, the cooling bin is also provided with a pressure relief valve.
[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0017] The utility model provides an open sampling head with a cooling function. A cooling chamber is arranged outside the sampling head and a cooling medium is added. The sampled material can be heat exchanged to achieve efficient cooling, eliminate fire accidents, and protect the life and health of personnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 The schematic diagram is a structural diagram of an open sampling head with a cooling function.
[0019] Markings in the figure: 1-sampling tube, 11-spiral section, 12-elbow, 2-connecting part, 3-cooling chamber, 31-filling tube, 4-first switch valve, 5-second switch valve, 6-pressure gauge, 7-pressure relief valve. DETAILED DESCRIPTION
[0020] The utility model is described in detail below in conjunction with the accompanying drawings.
[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0022] An open sampling head with cooling function, such as Figure 1 As shown, it includes a sampling tube 1, including a sampling tube 1, a connecting portion 2 is provided at the rear end of the sampling tube 1, a cooling bin 3 is sleeved in the middle of the sampling tube 1, and a cooling chamber for loading a cooling medium is provided in the cooling bin 3, and the sampling tube 1 passes through the cooling chamber.
[0023] Specifically, the sampling tube 1 is used to transfer samples, the connecting part 2 can connect the open sampling head with the detection, the cooling chamber 3 is used to place the cooling medium, and the sampling tube 1 passes through the cooling chamber, so that the sampled material can pass through the surrounding cooling medium to achieve heat exchange between the sample material and the cooling medium. Preferably, the cooling medium is liquid nitrogen, which has a boiling point of -196°C and is one of the lowest temperature liquids in nature. Since the material flow rate through the sampling tube 1 is very fast and needs to be cooled quickly, the liquid nitrogen can quickly and thoroughly cool the cooled material, which is better than water cooling and air cooling.
[0024] As another specific embodiment, the connection part 2 is a connection flange. The flange connection makes the installation and maintenance of the pipeline system easier. At the same time, it provides a stable seal and can withstand high pressure and temperature. In addition, a gasket can be used at the bottom of the connection flange, which can provide better sealing performance, reduce the risk of leakage, and thus improve the safety of the system.
[0025] As another specific implementation, the front end of the sampling tube 1 is provided with a first switch valve 4, which can control the flow rate of the material, so that the material is quickly condensed into a liquid phase in liquid nitrogen to prevent the sample from catching fire.
[0026] As another specific implementation, the first switch valve 4 is a first needle-type ball valve. Specifically, the needle-type ball valve has a relatively compact structure, occupies a small space, and can provide very precise flow control.
[0027] As another specific embodiment, the sampling tube 1 has a spiral section 11, and the spiral section 11 is arranged in the cooling chamber. The spiral cooling channel can achieve a longer flow path in a smaller space, increase the flow length in the cooling chamber 3, and thus improve the heat exchange efficiency.
[0028] As another specific embodiment, the cooling chamber 3 is provided with a filling port, through which the liquid nitrogen can be discharged after vaporization and can be refilled with liquid nitrogen.
[0029] As another specific embodiment, the filling port is arranged on the side wall of the cooling chamber 3, and the filling port is connected to a filling pipe 31, and a second switch valve 5 is arranged on the filling pipe 31. The filling port is arranged on the side wall to prevent interference with the sample and the detection device, and the filling and docking can be conveniently performed through the filling pipe 31. At the same time, the second switch valve 5 can control the opening and closing of the channel to prevent the discharge of gaseous liquid nitrogen. Specifically, the second switch valve 5 is a second needle ball valve.
[0030] As another specific embodiment, the front end of the sampling tube 1 is provided with an elbow 12. Since the open sample is guided to the rear section of the pump, the pressure is high, and the elbow 12 can be used to reduce the pressure. Furthermore, the elbow 12 is 45°. Since long-term sampling easily causes sample accumulation, the 90° elbow 12 is blocked and cannot be cleaned, while the 45° elbow 12 is easy to clean and purge.
[0031] As another specific embodiment, the cooling chamber 3 is further provided with a pressure gauge 6, which can measure the pressure in the cooling chamber and visualize it to ensure the normal operation of the open sampling head.
[0032] As another specific implementation, the cooling bin 3 is further provided with a pressure relief valve 7. When the system pressure reaches or exceeds the set value, the pressure relief valve 7 automatically opens to reduce the pressure of the cooling bin 3, thereby preventing the cooling bin from being damaged by overpressure and ensuring that the internal pressure after the liquid nitrogen is gasified does not exceed the design pressure. The material selected for the cooling bin is higher than the liquid nitrogen pressure, and 1.6Mpa, 316L material is selected.
[0033] Specifically, the sampling tube 1 can be made of DN8mm stainless steel, material 316L, bent into 4 coils inside, installed in the cooling bin 3 of DN32MM stainless steel, material 316L, and the two ends of the sampling tube 1 and the cooling bin 3 are welded, with a design pressure of 1.0MPa. The reserved opening of the cooling bin 3 uses a DN8, PN25 second needle-type ball valve to fill liquid nitrogen, the rear end of the sampling tube 1 is welded to the DN25, PN25 connecting flange, the front end is elbowed 1245°, and a DN8, PN25 first needle-type ball valve is used. Specifically, the first needle-type ball valve is arranged behind the elbow 12.
[0034] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0035] The utility model provides an open sampling head with a cooling function. A cooling chamber is arranged outside the sampling head and a cooling medium is added. The sampled material can be heat exchanged to achieve efficient cooling, eliminate fire accidents, and protect the life and health of personnel.
[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The present invention is extended to any new features or any new combination disclosed in this specification, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.
[0037] In the description of the embodiments of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
Claims
1. An open sampling head with cooling function, characterized in that: The invention comprises a sampling tube (1), wherein a connecting portion (2) is provided at the rear end of the sampling tube (1), a cooling chamber (3) is sleeved in the middle of the sampling tube (1), the cooling chamber (3) has a cooling chamber for loading a cooling medium, and the sampling tube (1) passes through the cooling chamber; the connecting portion (2) is a connecting flange; an elbow (12) is provided at the front end of the sampling tube (1); the cooling medium is liquid nitrogen, the cooling chamber (3) is provided with a filling port, and the cooling chamber (3) is also provided with a pressure relief valve (7).
2. The open sampling head with cooling function as claimed in claim 1, characterized in that: A first switch valve (4) is provided at the front end of the sampling tube (1).
3. The open sampling head with cooling function as claimed in claim 2, characterized in that: The first switch valve (4) is a first needle-type ball valve.
4. The open sampling head with cooling function as claimed in claim 1, characterized in that: The sampling tube (1) has a spiral section (11), and the spiral section (11) is arranged in the cooling chamber.
5. The open sampling head with cooling function as claimed in claim 1, characterized in that: The filling port is arranged on the side wall of the cooling bin (3), the filling port is connected to a filling pipe (31), and a second switch valve (5) is arranged on the filling pipe (31).
6. The open sampling head with cooling function as claimed in claim 1, characterized in that: The cooling bin (3) is also provided with a pressure gauge (6).