Heated explosion-proof sampling probe
Patent Information
- Application Number
- CN202522559874.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-02
- Publication Date
- 2026-10-30
- Estimated Expiration
- 2035-12-02
AI Technical Summary
[0002]在环保监测、石油化工、天然气处理及煤化工等工业领域，气体样品的精准取样是后续成分分析、工艺参数调控、污染物排放监测及生产安全预警的核心前提，取样探头作为直接接触待分析气体的关键部件，其性能直接决定取样效率、样品代表性及设备运行安全性，当前，市场上的取样探头在复杂工况应用中，仍存在诸多技术短板，难以满足高精度、连续稳定及安全可靠的取样需求；
[0016]1、该加热防爆取样探头，通过设置的取样加热机构，当需要对气体进行取样工作时，保温罩和保温筒内均设有加热腔，且第一加热管、第二加热管采用螺旋状设计并分别固定于加热腔内，能大幅增加与保温罩、保温筒的接触面积，实现对采样管和保温筒内部的均匀加热，确保取样过程中样品始终处于稳定的温度环境，避免因样品冷凝导致成分变化或管路堵塞，过滤筒通过支撑环和连接盘进行左右定位，且保温筒与连接盘通过固定销螺纹连接，当需要清理或更换过滤筒时，只需拧下固定销即可分离保温筒与连接盘，进而快速取出过滤筒，保温筒右侧设置的反吹接头内部固定有第二电磁阀，可通过外部气源控制实现对过滤筒的反吹清洁，当过滤筒表面附着杂质较多时，开启第二电磁阀即可利用高压气体将杂质吹除，无需频繁拆卸过滤筒，反吹过程可在线进行，不影响设备的正常取样流程。
Smart Images
Figure CN224921505U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sampling probe technology, specifically a heating explosion-proof sampling probe. Background Technology
[0002] In industrial fields such as environmental monitoring, petrochemicals, natural gas processing, and coal chemicals, accurate gas sampling is a core prerequisite for subsequent component analysis, process parameter control, pollutant emission monitoring, and production safety early warning. As a key component that directly contacts the gas to be analyzed, the performance of the sampling probe directly determines the sampling efficiency, sample representativeness, and equipment operation safety. Currently, sampling probes on the market still have many technical shortcomings in complex working conditions, making it difficult to meet the sampling requirements of high precision, continuous stability, and safety and reliability.
[0003] The industrial gases to be sampled often contain easily condensable components such as water vapor, hydrocarbons, and sulfides. Existing sampling probes generally lack efficient and uniform heating and insulation designs, and some probes do not have heating mechanisms. As the gas flows in the sampling pipeline, it condenses due to the decrease in ambient temperature. This not only changes the original composition ratio of the sample and causes deviations in subsequent analysis results, but the condensate can also easily mix with dust and particulate matter in the gas to form viscous substances, which can block the sampling pipeline and the interface of the analysis equipment, causing sampling interruption.
[0004] Although some probes are equipped with heating components, the heating tubes are mostly arranged in a straight line, with a small contact area with the insulation structure, resulting in uneven temperature distribution in the tubes. There is still a risk of condensation in some areas, which cannot guarantee the temperature stability of the sample throughout the entire sampling process.
[0005] Dust, solid particles, and other impurities mixed in industrial gases can easily cause wear or blockage to subsequent analytical instruments. Although some existing sampling probes integrate filtration functions, most filter cartridges are fixed by welding or multiple bolts. Disassembly, cleaning, or replacement requires complete disassembly of the probe body, which is not only cumbersome and time-consuming, but also requires shutdown, seriously affecting the continuity of continuous production and sampling. Therefore, it is necessary to design a heated explosion-proof sampling probe to solve the above problems. Utility Model Content
[0006] The purpose of this invention is to provide a heating explosion-proof sampling probe to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a heating explosion-proof sampling probe, including a mounting flange, a sampling heating mechanism is provided inside the mounting flange, and an explosion-proof mechanism is provided around the sampling heating mechanism;
[0008] The sampling heating mechanism includes a heat insulation cover, which is fixedly connected to the inside of the mounting flange. A first heating tube is fixedly connected inside the heat insulation cover. A sampling tube is fixedly connected to the inside of the heat insulation cover. A connecting plate is fixedly connected to the right side of the outer periphery of the heat insulation cover. A heat insulation cylinder is provided on the right side of the connecting plate. A fixing pin is threadedly connected inside the connecting plate. A sampling connector is fixedly connected to the bottom right side of the heat insulation cylinder. A first solenoid valve is fixedly connected inside the sampling connector. A backflush connector is fixedly connected to the right side of the heat insulation cylinder. A second solenoid valve is fixedly connected inside the backflush connector. A support ring is fixedly connected to the right side of the inside of the heat insulation cylinder. A filter cylinder is slidably connected to the inside of the heat insulation cylinder. The filter cylinder is located on the left side of the support ring and the right side of the connecting plate. A second heating tube is fixedly connected inside the heat insulation cylinder.
[0009] Preferably, the heat insulation cover and the heat insulation cylinder are respectively provided with heating chambers, the first heating tube and the second heating tube are respectively fixedly connected in the heating chambers, and both the first heating tube and the second heating tube are spiral-shaped. The heat insulation cover and the heat insulation cylinder are respectively provided with wiring grooves on the rear side, and are respectively connected to the heating chambers, so as to facilitate the heating of the sampled gas through the first heating tube and the second heating tube.
[0010] Preferably, the left side of the insulation cylinder is in contact with the right side of the connecting plate, and the fixing pin passes through the inside of the insulation cylinder, so as to ensure the stability between the connecting plate and the insulation cylinder through the fixing pin.
[0011] Preferably, the top of the sampling connector extends through the heating chamber inside the insulation cylinder, facilitating the delivery of the sampled gas through the sampling connector.
[0012] Preferably, the left side of the filter cylinder is in contact with the right side of the connecting plate, and the right side of the filter cylinder is in contact with the left side of the support ring, so as to facilitate the filtration of the sampled gas through the filter cylinder.
[0013] Preferably, the explosion-proof mechanism includes a first explosion-proof cover, which is slidably connected to the outer periphery of the insulation cylinder. A second explosion-proof cover is inserted into the rear side of the first explosion-proof cover, which is slidably connected to the outer periphery of the insulation cylinder. A fixing frame is slidably connected to the top periphery of the first explosion-proof cover, and a limit pin is threadedly connected inside the fixing frame.
[0014] Preferably, the inner sides of the first and second explosion-proof covers are respectively inserted into the connecting plate and slidably connected to the outer periphery of the sampling connector and the backflush connector. The fixing frame is slidably connected to the top periphery of the second explosion-proof cover. The limiting pin passes through the inside of the first and second explosion-proof covers. Two sets of the fixing frame and limiting pin are provided and symmetrically distributed on the upper and lower sides of the first and second explosion-proof covers. The second explosion-proof cover has a connecting groove inside, which is connected to the wiring groove on the rear side of the insulation cylinder, so that the first and second explosion-proof covers can achieve explosion-proof and heat preservation effects on the insulation cylinder.
[0015] Compared with the prior art, this utility model provides a heating explosion-proof sampling probe, which has the following beneficial effects:
[0016] 1. This explosion-proof heating sampling probe, through its sampling heating mechanism, features heating chambers within both the insulation cover and the insulation cylinder when gas sampling is required. The first and second heating tubes are spirally designed and fixed within these chambers, significantly increasing the contact area with the insulation cover and cylinder. This ensures uniform heating of the sampling tube and the inside of the insulation cylinder, guaranteeing a stable temperature environment for the sample during sampling and preventing compositional changes or pipe blockage due to sample condensation. The filter cylinder is positioned left and right by a support ring and a connecting plate, with the insulation cylinder and connecting plate connected by a threaded fixing pin. To clean or replace the filter cylinder, simply unscrew the fixing pin to separate the insulation cylinder from the connecting plate, allowing for quick removal of the filter cylinder. A second solenoid valve is fixed inside the backflush connector on the right side of the insulation cylinder, allowing for backflush cleaning of the filter cylinder via an external air source. When there are many impurities on the filter cylinder surface, opening the second solenoid valve allows high-pressure gas to blow away the impurities, eliminating the need for frequent filter cylinder disassembly. The backflush process can be performed online without affecting the normal sampling process.
[0017] 2. This explosion-proof sampling probe for heating, through its explosion-proof mechanism and the sliding splicing design of the first and second explosion-proof covers, with their inner sides inserted into the connecting plate, can completely wrap the insulation cylinder, forming a complete explosion-proof protective layer. The symmetrically distributed fixing frames and limiting pins ensure a firm connection between the first and second explosion-proof covers, preventing the protective structure from loosening due to vibration or external force. In addition, the connecting groove inside the second explosion-proof cover is connected to the wiring groove on the back of the insulation cylinder, which facilitates the wiring of the heating tube while ensuring that the explosion-proof performance is not compromised. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0021] Figure 3 This is a schematic diagram of the rear view structure of this utility model;
[0022] Figure 4This is a schematic diagram of the sampling heating mechanism.
[0023] Figure 5 This is a schematic diagram of the cross-sectional structure of the thermal insulation cover;
[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of the insulation cylinder;
[0025] Figure 7 This is a schematic diagram of the explosion-proof mechanism.
[0026] In the diagram: 1. Mounting flange; 2. Sampling heating mechanism; 3. Explosion-proof mechanism; 21. Insulation cover; 22. Sampling tube; 23. Connecting plate; 24. Insulation cylinder; 25. First heating tube; 26. Fixing pin; 27. Sampling connector; 28. First solenoid valve; 29. Backflush connector; 291. Second solenoid valve; 292. Filter cylinder; 293. Second heating tube; 294. Support ring; 31. First explosion-proof cover; 32. Limiting pin; 33. Second explosion-proof cover; 34. Fixing frame. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0029] This utility model provides the following technical solution:
[0030] Example 1
[0031] Please see Figure 1-7 This utility model provides a technical solution: a heating explosion-proof sampling probe, including a mounting flange 1, a sampling heating mechanism 2 is provided inside the mounting flange 1, and an explosion-proof mechanism 3 is provided around the sampling heating mechanism 2.
[0032] The sampling heating mechanism 2 includes a heat insulation cover 21, which is fixedly connected to the inside of the mounting flange 1. A first heating tube 25 is fixedly connected inside the heat insulation cover 21. A sampling tube 22 is fixedly connected inside the heat insulation cover 21. A connecting plate 23 is fixedly connected to the right side of the outer periphery of the heat insulation cover 21. A heat insulation cylinder 24 is provided on the right side of the connecting plate 23. A fixing pin 26 is threadedly connected inside the connecting plate 23. A sampling connector 27 is fixedly connected to the bottom right side of the heat insulation cylinder 24. A first solenoid valve 28 is fixedly connected inside the sampling connector 27. A backflush connector 29 is fixedly connected to the right side of the heat insulation cylinder 24. A second solenoid valve 291 is fixedly connected inside the backflush connector 29. A support ring 294 is fixedly connected to the right side of the inner periphery of the heat insulation cylinder 24. A filter cylinder 292 is slidably connected to the inner periphery of the heat insulation cylinder 24. The filter cylinder 292 is located on the left side of the support ring 294 and the right side of the connecting plate 23. A second heating tube 293 is fixedly connected inside the heat insulation cylinder 24.
[0033] Heating chambers are provided inside the heat insulation cover 21 and the heat insulation cylinder 24 respectively. The first heating tube 25 and the second heating tube 293 are fixedly connected to the heating chambers respectively, and both the first heating tube 25 and the second heating tube 293 are spiral. Wiring grooves are provided on the rear side of the heat insulation cover 21 and the heat insulation cylinder 24 respectively, and they are connected to the heating chambers respectively, so as to facilitate the heating of the sampled gas through the first heating tube 25 and the second heating tube 293.
[0034] The left side of the insulation cylinder 24 is in contact with the right side of the connecting plate 23, and the fixing pin 26 passes through the inside of the insulation cylinder 24, so as to ensure the stability between the connecting plate 23 and the insulation cylinder 24 through the fixing pin 26.
[0035] The top of the sampling connector 27 extends through the heating chamber inside the insulation cylinder 24, facilitating the delivery of the sampled gas through the sampling connector 27.
[0036] The left side of the filter cartridge 292 is in contact with the right side of the connecting plate 23, and the right side of the filter cartridge 292 is in contact with the left side of the support ring 294, which facilitates the filtration of the sampled gas through the filter cartridge 292.
[0037] Example 2
[0038] Please see Figure 1-7 Furthermore, based on Embodiment 1, the explosion-proof mechanism 3 further includes a first explosion-proof cover 31, which is slidably connected to the periphery of the insulation cylinder 24. A second explosion-proof cover 33 is inserted into the rear side of the first explosion-proof cover 31, which is slidably connected to the periphery of the insulation cylinder 24. A fixing frame 34 is slidably connected to the top periphery of the first explosion-proof cover 31, and a limit pin 32 is threadedly connected inside the fixing frame 34.
[0039] The inner sides of the first explosion-proof cover 31 and the second explosion-proof cover 33 are respectively inserted into the inside of the connecting plate 23, and are respectively slidably connected to the outer periphery of the sampling connector 27 and the backflush connector 29. The fixing frame 34 is slidably connected to the top periphery of the second explosion-proof cover 33. The limiting pin 32 passes through the inside of the first explosion-proof cover 31 and the second explosion-proof cover 33. Two sets of fixing frames 34 and limiting pins 32 are provided and are symmetrically distributed on the upper and lower sides of the first explosion-proof cover 31 and the second explosion-proof cover 33. A connecting groove is opened inside the second explosion-proof cover 33, and the connecting groove is connected to the wiring groove on the rear side of the insulation cylinder 24, so that the first explosion-proof cover 31 and the second explosion-proof cover 33 can achieve the explosion-proof and heat preservation effect of the insulation cylinder 24.
[0040] In actual operation, when this device is used and gas sampling is required, the filter cylinder 292 is first slid into the insulation cylinder 24 so that its right side contacts the left side of the support ring 294. At this time, the left side of the insulation cylinder 24 contacts the right side of the connecting plate 23, and the insulation cylinder 24 and the connecting plate 23 are fixed by the fixing pin 26 to ensure the stability of the insulation cylinder 24. At the same time, the sampling tube 22 is fixed in the pipe to be sampled, and the sampling tube 22 is fixed to the pipe by the mounting flange 1 to further ensure the stability of the sampling tube 22 and the insulation cylinder 24.
[0041] At this time, the first explosion-proof cover 31 and the second explosion-proof cover 33 are slidably connected to the outer periphery of the insulation cylinder 24, and are inserted into the inner side of the connecting plate 23, which can completely wrap the insulation cylinder 24 to form a complete explosion-proof protective layer. The fixed frame 34 and the limiting pin 32 symmetrically distributed on the upper and lower sides can ensure that the first explosion-proof cover 31 and the second explosion-proof cover 33 are firmly connected, and avoid the protective structure from loosening due to vibration or external force. In addition, the connecting groove inside the second explosion-proof cover 33 is connected to the wiring groove on the rear side of the insulation cylinder 24, which can facilitate the wiring of the heating tube while ensuring that the explosion-proof performance is not damaged.
[0042] The external high-pressure gas supply pipeline is connected to the backflush connector 29, and the external sampling delivery pipe is connected to the sampling connector 27. At the same time, the first heating tube 25 and the second heating tube 293 are connected through the external power supply equipment. The insulation cover 21 and the insulation cylinder 24 are both equipped with heating chambers. The first heating tube 25 and the second heating tube 293 adopt a spiral design and are fixed in the heating chambers respectively, which can greatly increase the contact area with the insulation cover 21 and the insulation cylinder 24, so as to achieve uniform heating of the sampling tube 22 and the insulation cylinder 24. This ensures that the sample is always in a stable temperature environment during the sampling process, and avoids changes in composition or pipeline blockage due to sample condensation. When the sampled gas is delivered to the filter cylinder 292 through the sampling tube 22, the connecting plate 23 and the insulation cylinder 24, the filter cylinder 292 can purify the impurities in the gas and avoid blockage of the subsequent gas analysis equipment. When the first solenoid valve 28 is opened, the heated and filtered gas will be transmitted through the sampling connector 27 for subsequent analysis.
[0043] When the filter cartridge 292 needs to be cleaned or replaced, simply unscrew the fixing pin 26 to separate the insulation cylinder 24 from the connecting plate 23, and then quickly remove the filter cartridge 292. The backflush connector 29 on the right side of the insulation cylinder 24 has a second solenoid valve 291 fixed inside. It can be controlled by an external air source to backflush and clean the filter cartridge 292. When there are many impurities on the surface of the filter cartridge 292, the second solenoid valve 291 can be opened to blow away the impurities with high-pressure gas. There is no need to frequently disassemble the filter cartridge 292. The backflush process can be carried out online without affecting the normal sampling process of the equipment.
[0044] In this application, all the first heating tubes 25, the second heating tubes 293, the first solenoid valve 28, and the second solenoid valve 291 need to be connected to the same PLC controller near the probe to ensure automated operation of the equipment. The PLC controller is existing technology, and those skilled in the art are well aware of its operation method, so it will not be described in detail here.
[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
Claims
1. A heating explosion-proof sampling probe, comprising a mounting flange (1), characterized in that: A sampling heating mechanism (2) is provided inside the mounting flange (1), and an explosion-proof mechanism (3) is provided around the sampling heating mechanism (2). The sampling heating mechanism (2) includes a heat insulation cover (21), which is fixedly connected to the inside of the mounting flange (1). A first heating tube (25) is fixedly connected inside the heat insulation cover (21). A sampling tube (22) is fixedly connected inside the heat insulation cover (21). A connecting plate (23) is fixedly connected to the right side of the outer periphery of the heat insulation cover (21). A heat insulation cylinder (24) is provided on the right side of the connecting plate (23). A fixing pin (26) is threaded inside the connecting plate (23). A sampling connector (27) is fixedly connected to the bottom right side of the heat insulation cylinder (24). A first solenoid valve (28) is fixedly connected inside the sampling connector (27). A backflush connector (29) is fixedly connected to the right side of the heat insulation cylinder (24). A second solenoid valve (291) is fixedly connected inside the backflush connector (29). A support ring (294) is fixedly connected to the right side of the heat insulation cylinder (24), and a filter cylinder (292) is slidably connected to the inside of the heat insulation cylinder (24). The filter cylinder (292) is located on the left side of the support ring (294) and the right side of the connecting plate (23). A second heating tube (293) is fixedly connected inside the heat insulation cylinder (24).
2. The heating explosion-proof sampling probe according to claim 1, characterized in that: Heating chambers are provided inside the heat insulation cover (21) and the heat insulation cylinder (24). The first heating tube (25) and the second heating tube (293) are fixedly connected to the heating chambers. The first heating tube (25) and the second heating tube (293) are both spiral. Wiring grooves are provided on the rear side of the heat insulation cover (21) and the heat insulation cylinder (24), and they are respectively connected to the heating chambers.
3. The heating explosion-proof sampling probe according to claim 1, characterized in that: The left side of the insulation cylinder (24) is in contact with the right side of the connecting plate (23), and the fixing pin (26) passes through the inside of the insulation cylinder (24).
4. The heating explosion-proof sampling probe according to claim 1, characterized in that: The top of the sampling connector (27) extends through the heating chamber inside the insulation cylinder (24).
5. The heating explosion-proof sampling probe according to claim 1, characterized in that: The left side of the filter cylinder (292) is in contact with the right side of the connecting plate (23), and the right side of the filter cylinder (292) is in contact with the left side of the support ring (294).
6. The heating explosion-proof sampling probe according to claim 1, characterized in that: The explosion-proof mechanism (3) includes a first explosion-proof cover (31), which is slidably connected to the periphery of the insulation cylinder (24). A second explosion-proof cover (33) is inserted into the rear side of the first explosion-proof cover (31), which is slidably connected to the periphery of the insulation cylinder (24). A fixed frame (34) is slidably connected to the top periphery of the first explosion-proof cover (31), and a limit pin (32) is threadedly connected inside the fixed frame (34).
7. A heating explosion-proof sampling probe according to claim 6, characterized in that: The inner sides of the first explosion-proof cover (31) and the second explosion-proof cover (33) are respectively inserted into the inside of the connecting plate (23) and are respectively slidably connected to the outer periphery of the sampling connector (27) and the backflush connector (29). The fixing frame (34) is slidably connected to the top periphery of the second explosion-proof cover (33). The limiting pin (32) passes through the inside of the first explosion-proof cover (31) and the second explosion-proof cover (33). The fixing frame (34) and the limiting pin (32) are provided in two sets and are symmetrically distributed on the upper and lower sides of the first explosion-proof cover (31) and the second explosion-proof cover (33). The second explosion-proof cover (33) has a connecting groove inside, and the connecting groove is connected to the wiring groove on the rear side of the insulation cylinder (24).