Flue pressure measuring point pressure tapping device

Abstract

The utility model discloses a pressure tapping device for a flue pressure measuring point. The pressure tapping device comprises a pressure tapping pipe, an anti-corrosion ball valve and a pressure transmitter, one end of the pressure tapping pipe is communicated with the flue, the other end of the pressure tapping pipe is connected with the anti-corrosion ball valve, and the middle of the pressure tapping pipe is further connected with a sampling pipe; the tail end of the sampling pipe is connected with a pressure transmitter; and the other end of the anti-corrosion ball valve is communicated with a helium supply pipeline of a factory. According to the utility model, the pressure measurement operation is simpler and quicker, a closed measurement environment can be formed only by closing the ball valve at the rear end, and the pressure transmitter directly reads data, so that the working efficiency is improved; the anti-corrosion ball valve is combined with the nitrogen supply pipeline, so that back flushing cleaning of the pressure tapping pipe and the sampling pipe is realized, the maintenance process is greatly simplified, and the working intensity of maintenance personnel is reduced; the anti-corrosion ball valve effectively resists the corrosion of the severe environment in the flue to the pressure tapping device, and the service life of the device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of flue pressure detection, and particularly relates to a pressure measuring point pressure taking device for a flue. Background Art

[0002] During the daily maintenance of the existing flue pressure taking pipe, the pressure taking pipe needs to be removed and cleaned. However, due to the small pressure taking port, the flue connection part cannot be cleaned. Over time, soot will accumulate, easily blocking the pressure taking pipe. Acid water aggregation is also likely to corrode the pressure taking pipe, resulting in leakage at the welded joint, and it is impossible to check during normal inspection. After disassembling and cleaning the sampling port, the sealing is rather troublesome and it is easy to have an unsealed situation, affecting the subsequent negative pressure measurement. To solve the above deficiencies in the prior art, the present invention proposes a new solution. Summary of the Invention

[0003] Aiming at the deficiencies that the above-mentioned flue pressure taking pipe is not convenient for inspection and difficult to clean, and is prone to damage after long-term use, the utility model provides a flue pressure measuring point pressure taking device that can facilitate cleaning and inspection of the sampling port during daily maintenance, reduce the leakage of the sampling port, reduce the workload of maintenance personnel and has a long service life.

[0004] To achieve the above object, the technical solution of the utility model is as follows:

[0005] A flue pressure measuring point pressure taking device includes a pressure taking pipe, an anti-corrosion ball valve and a pressure transmitter; one end of the pressure taking pipe is communicated with the flue, the other end is connected to the anti-corrosion ball valve, and a sampling pipe is also connected to the middle of the pressure taking pipe; the end of the sampling pipe is connected to the pressure transmitter; the other end of the anti-corrosion ball valve is communicated with the helium gas supply pipeline of the factory.

[0006] During use, close the ball valve at the rear end to make the flue communicate with the pressure taking pipe to form a negative pressure closed space. Then, the pressure can be measured through the pressure transmitter, and the pressure measurement operation is simple. After long-term use, open the anti-corrosion ball valve to make the pressure taking pipe communicate with the nitrogen gas supply pipeline of the factory, and nitrogen enters the pressure taking pipe for back blowing, which can empty the accumulated ash in the pressure taking pipe and the sampling pipe. When large chunks of ash are formed, the block-shaped soot in the sampling port can be cleaned by opening the seal ball valve. After the maintenance is completed, close the valve to complete the sealing of the sampling port.

[0007] Further, the pressure taking pipe is communicated with the flue by welding. Welding connection is stable and reliable, which can ensure the tight connection between the pressure taking pipe and the flue, avoiding loosening or leakage caused by vibration or high temperature, improving the stability and reliability of the overall device; and welding can form a seamless connection surface, greatly reducing the possibility of gas or dust leakage from the interface, ensuring the accuracy of the measurement result.

[0008] Further, the connection angle between the flue and the pressure tapping pipe is 0°-60° clockwise. Within this angle range, the pressure tapping pipe can better capture the pressure changes of the flowing gas in the flue. Especially for high-speed flowing air currents, the non-right-angle connection can more effectively reduce the direct impact of the air current on the measurement point, improving the stability and accuracy of pressure measurement; the design of obliquely inserting into the flue helps prevent dust and particulate matter from accumulating at the inlet of the pressure tapping pipe. Compared with vertical or parallel connection methods, the oblique angle connection can utilize the natural flow characteristics of the air current, reduce the dust accumulation inside the pressure tapping pipe, and extend the cleaning cycle; the design within this angle range has high flexibility and can adapt to flues of different shapes and sizes. Even in complex spatial layouts, a suitable installation position can be found, improving the versatility and adaptability of the pressure taking device.

[0009] Further, the connection angle between the pressure tapping pipe and the sampling pipe is 45°-135°. 45°-135° can ensure that the sampling pipe better captures the pressure of the flowing gas in the pressure tapping pipe, facilitating pressure detection. At the same time, the inclined design can reduce dust accumulation.

[0010] Further, the pressure tapping pipe is made of DN50 stainless steel pipe, with a length of 400 mm and a thickness of 4 mm. Stainless steel pipes have excellent corrosion resistance, especially in environments such as flues where there may be acidic or alkaline gases or high-temperature steam, and can effectively resist corrosion, extending the service life of the pressure tapping pipe; the 4-mm wall thickness provides sufficient mechanical strength to withstand the pressure fluctuations and possible physical impacts inside the flue, reducing the risk of damage caused by external forces, and at the same time can effectively control the manufacturing cost and facilitate popularization and use.

[0011] Further, an electromagnetic valve is also installed between the anti-corrosion ball valve and the helium gas supply pipeline of the factory, and the electromagnetic valve is also connected to a PLC controller. After the anti-corrosion ball valve is opened, the PLC controller can be set to open the electromagnetic valve regularly to realize the regular cleaning of the device, and the PLC controller can be connected to the control center of the factory to facilitate the unified control and use of the device.

[0012] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0013] 1. The pressure measurement operation of the utility model becomes simpler and faster. Just close the rear ball valve to form a closed measurement environment, and the pressure transmitter directly reads the data, improving work efficiency; the combination of the anti-corrosion ball valve and the nitrogen gas supply pipeline realizes the backwashing and cleaning of the pressure tapping pipe and the sampling pipe, greatly simplifying the maintenance process and reducing the work intensity of maintenance personnel; the anti-corrosion ball valve effectively resists the corrosion of the harsh environment inside the flue on the pressure taking device and extends the service life of the device.

[0014] 2. The slight dust accumulation of the present utility model can be solved by nitrogen back-blowing, while the large-scale dust deposits can be cleaned by manually opening the sealed ball valve, ensuring the adaptability and functionality of the pressure-taking device under various working conditions; the closed negative pressure system and regular cleaning mechanism ensure the unobstructed sampling pipe, avoiding the influence of dust accumulation on pressure measurement and guaranteeing the accuracy of data.

[0015] 3. The stainless steel pipe used for the sampling pipe of the present utility model has excellent corrosion resistance, especially in environments such as flue ducts where acidic or alkaline gases or high-temperature steam may exist, and can effectively resist corrosion and extend the service life of the pressure-taking pipe; the combined use of the solenoid valve and the anti-corrosion ball valve facilitates the purging and dust cleaning operation, effectively avoiding the blockage and damage of the device while being convenient for cleaning. Description of the Drawings

[0016] Figure 1 is an overall structural schematic diagram of a pressure measurement point pressure-taking device for a flue duct.

[0017] Reference Signs in the Drawings:

[0018] Flue duct - 1, Pressure-taking pipe - 2, Sampling pipe - 3, Anti-corrosion ball valve - 4, Pressure transmitter - 5, Solenoid valve - 6, PLC controller - 7. Detailed Embodiment

[0019] The present utility model will be further described below with reference to the drawings.

[0020] Embodiment 1: A pressure measurement point pressure-taking device for a flue duct, comprising a pressure-taking pipe 2, an anti-corrosion ball valve 4 and a pressure transmitter 5; one end of the pressure-taking pipe 2 is connected to the flue duct 1, and the other end is connected to the anti-corrosion ball valve 4, and a sampling pipe 3 is also connected in the middle of the pressure-taking pipe 2; the end of the sampling pipe 3 is connected to the pressure transmitter 5; the other end of the anti-corrosion ball valve 4 is connected to the helium gas supply pipeline of the factory.

[0021] During use, close the ball valve at the rear end to make the flue duct 1 communicate with the pressure-taking pipe 2 to form a negative pressure closed space, and then the pressure can be measured through the pressure transmitter 5, and the pressure measurement operation is simple; after long-term use, open the anti-corrosion ball valve 4 to make the pressure-taking pipe 2 communicate with the nitrogen gas supply pipeline of the factory, and nitrogen enters the pressure-taking pipe 2 for back-blowing, which can empty the dust accumulated in the pressure-taking pipe 2 and the sampling pipe 3; when large-scale dust deposits are formed, the block-shaped soot in the sampling port can be cleaned by opening the sealed ball valve, and after the maintenance is completed, close the valve to complete the sealing of the sampling port.

[0022] Example 2: The difference from Example 1 is that the pressure-taking pipe 2 is connected to the flue 1 by welding. Welding connection is stable and reliable, which can ensure the tight connection between the pressure-taking pipe 2 and the flue 1, avoid loosening or leakage caused by vibration or high temperature, and improve the stability and reliability of the overall device; moreover, welding can form a seamless connection surface, greatly reducing the possibility of gas or dust leakage from the interface, and ensuring the accuracy of the measurement results.

[0023] The connection angle between the flue 1 and the pressure-taking pipe 2 is 0° clockwise. Within this angle range, the pressure-taking pipe 2 can better capture the pressure change of the flowing gas in the flue 1. Especially for high-speed flowing air, the non-right-angle connection can more effectively reduce the direct impact of the air flow on the measurement point, improving the stability and accuracy of pressure measurement; the design of obliquely inserting into the flue 1 helps to prevent dust and particulate matter from accumulating at the inlet of the pressure-taking pipe 2. Compared with the vertical or parallel connection methods, the angled connection can utilize the natural flow characteristics of the air flow, reduce the ash accumulation inside the pressure-taking pipe 2, and extend the cleaning cycle; the design within this angle range has high flexibility and can adapt to flues 1 of different shapes and sizes. Even in a complex spatial layout, a suitable installation position can be found, improving the versatility and adaptability of the pressure-taking device.

[0024] The connection angle between the pressure-taking pipe 2 and the sampling pipe 3 is 45°. 45° can ensure that the sampling pipe 3 better captures the pressure of the flowing gas in the pressure-taking pipe 2, facilitating pressure detection, and at the same time, the inclined design can reduce ash accumulation.

[0025] Example 3: The difference from Example 2 is that the connection angle between the flue 1 and the pressure-taking pipe 2 is 30° clockwise. At this angle, the pressure-taking pipe 2 can better capture the pressure change of the flowing gas in the flue 1, especially for high-speed flowing air; the design of obliquely inserting into the flue 1 helps to prevent dust and particulate matter from accumulating at the inlet of the pressure-taking pipe 2. Compared with the vertical or parallel connection methods, the angled connection can utilize the natural flow characteristics of the air flow, reduce the ash accumulation inside the pressure-taking pipe 2, and extend the cleaning cycle; the design within this angle range has high flexibility and can adapt to flues 1 of different shapes and sizes. Even in a complex spatial layout, a suitable installation position can be found, improving the versatility and adaptability of the pressure-taking device.

[0026] The connection angle between the pressure-taking pipe 2 and the sampling pipe 3 is 90°. The 90° setting can ensure that the sampling pipe 3 better captures the pressure of the flowing gas in the pressure-taking pipe 2, facilitating pressure detection, and at the same time, the inclined design can reduce ash accumulation.

[0027] The pressure extraction pipe 2 is made of a DN50 stainless steel pipe. The pressure extraction pipe 2 is 400 mm long and 4 mm thick. Stainless steel pipes have excellent corrosion resistance, especially in environments such as the flue 1 where there may be acidic or alkaline gases or high-temperature steam, and can effectively resist corrosion, extending the service life of the pressure extraction pipe 2; the 4-mm wall thickness provides sufficient mechanical strength to withstand the pressure fluctuations and possible physical impacts inside the flue 1, reducing the risk of damage caused by external forces, and at the same time can effectively control the manufacturing cost and facilitate popularization and use.

[0028] Example 4: The difference from Example 1 is that the connection angle between the flue 1 and the pressure extraction pipe 2 is 60° clockwise.

[0029] The connection angle between the pressure extraction pipe 2 and the sampling pipe 3 is 135°. 135° can ensure that the sampling pipe 3 better captures the pressure of the flowing gas in the pressure extraction pipe 2, facilitating pressure detection, and at the same time the inclined design can reduce dust accumulation.

[0030] In the description of the present utility model, a large number of specific details are illustrated. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0031] An electromagnetic valve 6 is also installed between the anti-corrosion ball valve 4 and the helium gas supply pipeline of the factory, and the electromagnetic valve 6 is also connected to a PLC controller 7. After the anti-corrosion ball valve 4 is opened, the PLC controller 7 can be set to open the electromagnetic valve 6 regularly to achieve regular cleaning of the device, and the PLC controller 7 can be connected to the control center of the factory to facilitate unified control and use of the device.

[0032] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the description of the present utility model.

Claims

1. A pressure measuring point pressure-taking device for a flue, characterized in that: It includes a pressure tapping pipe (2), an anti-corrosion ball valve (4) and a pressure transmitter (5); one end of the pressure tapping pipe (2) is communicated with the flue (1), the other end is connected to the anti-corrosion ball valve (4), and a sampling pipe (3) is also connected to the middle of the pressure tapping pipe (2); the end of the sampling pipe (3) is connected to the pressure transmitter (5); the other end of the anti-corrosion ball valve (4) is communicated with the helium gas supply pipeline of the factory.

2. The pressure measuring point pressure taking device for a flue as described in claim 1, wherein: The pressure tapping pipe (2) is communicated with the flue (1) by welding.

3. The pressure measuring point pressure-taking device for a flue duct according to claim 1, characterized in that: The connection angle between the flue (1) and the pressure tapping pipe (2) is 0°-60° clockwise.

4. A flue gas pressure measurement point pressure taking device according to any one of claims 1-3, characterized in that: The connection angle between the pressure tapping pipe (2) and the sampling pipe (3) is 45°-135°.

5. The pressure measuring point pressure taking device for the flue duct according to claim 4, wherein: The pressure tapping pipe (2) is made of DN50 stainless steel pipe, the pressure tapping pipe (2) is 400 mm long and 4 mm thick.

6. The pressure measuring point pressure taking device for a flue as described in claim 1, wherein: An electromagnetic valve (6) is also installed between the anti-corrosion ball valve (4) and the helium gas supply pipeline of the factory, and the electromagnetic valve (6) is also connected to a PLC controller (7).

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