Sampling tube blocking degree detection device with purging function

Abstract

The utility model discloses a sampling tube blocking degree detection device with a purging function, and relates to the technical field of detection sampling. According to the sampling pipe blockage degree detection device with the purging function, a first detection assembly is arranged on a medium pipeline and comprises a first air inlet pipeline, a first back flushing valve, a first detection valve, a first connecting pipeline, a first isolating valve, a first sampling pipeline, a first sampling valve and a first measuring instrument, and a second detection assembly is arranged on the medium pipeline and comprises a second air inlet pipeline, a second back flushing valve and a second detection valve. The second detection assembly comprises a second gas inlet pipeline, a second blowback valve, a second detection valve, a second detection instrument, a second isolation valve, a second sampling pipeline, a second sampling valve, a second measurement instrument and a second connection pipeline, and the first detection assembly and the second detection assembly are arranged to be standby for each other, so that frequent detection of the smoothness of the second sampling pipeline is avoided; the sampling efficiency is reduced because sampling needs to be stopped back and forth, so that the sampling efficiency is ensured when the sampling pipeline II is detected.

Description

Technical Field

[0001] The utility model relates to the technical field of detection and sampling, in particular to a sampling tube blockage degree detection device with a purging function. Background Art

[0002] In the field of industrial control, there are various sampling devices, such as pressure, flow, liquid level, component analysis, etc., especially the accuracy and stability of pressure sampling are extremely important, and the accuracy of pressure value is related to the stable operation of the whole system. In constant pressure occasions, a pressure detection device is installed at the outlet of the water pump or fan, and the pressure signal is fed back to the water pump or fan. The water pump or fan performs PID automatic tracking and adjustment according to the pressure value fed back to ensure the stability of the system. If the pressure value fed back is an erroneous and inaccurate pressure value, it will cause catastrophic damage to the system. The actual medium pipeline pressure is too high or too low and needs to be adjusted in time. Due to the blockage of the sampling tube, the actual medium pressure signal cannot be accurately transmitted to the water pump or fan.

[0003] In the prior art, one end of a sampling tube is generally directly connected to the medium pipeline, and the other end is installed on the detector.

[0004] The existing sampling devices have the following disadvantages:

[0005] 1. Unable to accurately judge the degree of blockage of the sampling tube and whether it is blocked

[0006] 2. After the sampling tube is blocked, it is impossible to clean and dredge the sampling tube online

[0007] 3. When unclogging the sampling tube, the system needs to be stopped, which has a great impact on the operation of the entire system.

[0008] 4. The stability of a single measuring instrument is relatively poor, and measurement deviations are prone to occur and cannot be corrected in time.

[0009] After searching the relevant fields, it is known that: Chinese utility model patents, authorization announcement numbers "CN218330870U" and "CN219736920U", disclose a water quality detection sampling impurity removal device and a water quality detection sampling device with anti-clogging function.

[0010] The above technical solution cannot sample the medium pipeline at the same time when detecting whether the sampling pipeline is blocked, which delays the normal sampling. To ensure the normal use of the sampling pipeline, it is necessary to detect whether the sampling pipeline is blocked at regular intervals, which results in a significant delay in the normal sampling when using the detection device. Utility Model Content

[0011] The purpose of the utility model is to solve at least one of the technical problems existing in the prior art and to provide a sampling tube blockage degree detection device with a purging function, which can solve the problem that it is necessary to detect whether the sampling pipeline is blocked at regular intervals, thereby greatly delaying the normal sampling when using the detection device.

[0012] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sampling tube blockage degree detection device with a purge function, comprising a medium pipeline;

[0013] The detection component 1 is arranged on the medium pipeline, and the detection component 1 includes an air inlet pipeline 1, a back-blowing valve 1, a detection valve 1, a connecting pipeline 1, an isolation valve 1, a sampling pipeline 1, a sampling valve 1 and a measuring instrument 1. The sampling pipeline 1 is welded on the medium pipeline, the sampling valve 1 is installed on the sampling pipeline 1, and the measuring instrument 1 is installed on the other end of the sampling valve 1;

[0014] The second detection component is arranged on the medium pipeline, and the second detection component includes a second air inlet pipeline, a second back-blowing valve, a second detection valve, a second detection instrument, a second isolation valve, a second sampling pipeline, a second sampling valve, a second measuring instrument and a second connecting pipeline. The second sampling pipeline is welded on the medium pipeline, the second sampling valve is installed on the second sampling pipeline, and the second measuring instrument is installed at the other end of the second sampling valve;

[0015] The detection component three is arranged on the medium pipeline. The detection component three comprises a sampling pipeline three and a measuring instrument three. The sampling pipeline three is welded on the medium pipeline, and the measuring instrument three is installed at the other end of the sampling pipeline three.

[0016] Preferably, the isolation valve 1 is installed on the sampling pipeline 1, and the connecting pipeline 1 is installed at the other end of the isolation valve 1.

[0017] Preferably, the detection valve 1 is installed on the connecting pipe 1, and the detection instrument 1 is installed at the other end of the detection valve 1.

[0018] Preferably, the back-blow valve 1 is installed on the connecting pipe 1, and the air inlet pipe 1 is installed at the other end of the back-blow valve 1.

[0019] Preferably, the second isolation valve is installed on the second sampling pipeline, and the second connecting pipeline is installed at the other end of the second isolation valve.

[0020] Preferably, the second detection valve is installed on the connecting pipe 2, and the second detection instrument is installed at the other end of the second detection valve.

[0021] Preferably, the second back-blow valve is installed on the second connecting pipe, and the second air inlet pipe is installed at the other end of the second back-blow valve.

[0022] Compared with the prior art, the beneficial effects of the utility model are:

[0023] (1) The sampling tube blockage detection device with a purging function is equipped with a detection component 1 and a detection component 2 as backup components, so that when the sampling tube 2 is detected, the measuring instrument 1 can perform sampling detection normally, so that the normal sampling of the measuring instrument 1 is not delayed while the sampling tube 2 is detected, thereby avoiding the frequent detection of the patency of the sampling tube 2, which requires the sampling to be stopped back and forth and causes a reduction in the sampling efficiency, thereby ensuring the sampling efficiency when the sampling tube 2 is detected.

[0024] (2) The sampling tube blockage detection device with a purging function, when there is a phenomenon of poor sampling flow in the sampling pipe 2 or the sampling pipe 1, is provided with an air inlet pipe 1 and an air inlet pipe 2, and compressed air is injected into the interior of the sampling pipe 1 and the sampling pipe 2 through the air inlet pipe 1 and the air inlet pipe 2 for purging, thereby achieving the effect of cleaning the interior of the sampling pipe 1 and the sampling pipe 2, and ensuring the smoothness of the sampling in the sampling pipe 1 and the sampling pipe 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0026] Figure 1 This is a schematic diagram of the improved structure of the sampling device of the utility model;

[0027] Figure 2 This is a schematic diagram of the sampling method of the original device of the utility model.

[0028] Figure numerals: 1. Air inlet pipe one; 2. Back-blowing valve one; 3. Detection valve one; 4. Connecting pipe one; 5. Isolation valve one; 6. Sampling pipe one; 7. Sampling valve one; 8. Measuring instrument one; 9. Detection instrument one; 10. Air inlet pipe two; 11. Back-blowing valve two; 12. Detection valve two; 13. Detection instrument two; 14. Isolation valve two; 15. Sampling pipe two; 16. Sampling valve two; 17. Measuring instrument two; 18. Connecting pipe two; 19. Medium pipe; 20. Sampling pipe three; 21. Measuring instrument three. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0033] See also Figure 1-2 , the utility model provides a technical solution: a sampling tube blockage degree detection device with a purge function, comprising a medium pipeline 19;

[0034] The detection component 1 is arranged on the medium pipeline 19, and the detection component 1 includes an air inlet pipeline 1, a back-blowing valve 2, a detection valve 3, a connecting pipeline 4, an isolation valve 5, a sampling pipeline 6, a sampling valve 7 and a measuring instrument 8. The sampling pipeline 6 is welded on the medium pipeline 19, the sampling valve 7 is installed on the sampling pipeline 6, and the measuring instrument 8 is installed on the other end of the sampling valve 7;

[0035] The second detection component is arranged on the medium pipeline 19, and the second detection component includes the second air inlet pipeline 10, the second back-blowing valve 11, the second detection valve 12, the second detection instrument 13, the second isolation valve 14, the second sampling pipeline 15, the second sampling valve 16, the second measuring instrument 17 and the second connecting pipeline 18. The second sampling pipeline 15 is welded on the medium pipeline 19, the second sampling valve 16 is installed on the second sampling pipeline 15, and the second measuring instrument 17 is installed at the other end of the second sampling valve 16;

[0036] The detection component three is arranged on the medium pipeline 19 , and the detection component three includes a sampling pipeline three 20 and a measuring instrument three 21 . The sampling pipeline three 20 is welded on the medium pipeline 19 , and the measuring instrument three 21 is installed at the other end of the sampling pipeline three 20 .

[0037] The isolation valve 5 is installed on the sampling pipe 6, and the connecting pipe 4 is installed at the other end of the isolation valve 5.

[0038] The detection valve 3 is installed on the connecting pipe 4, and the detection instrument 9 is installed on the other end of the detection valve 3.

[0039] The back-blowing valve 2 is installed on the connecting pipe 4, and the air inlet pipe 1 is installed on the other end of the back-blowing valve 2.

[0040] The second isolation valve 14 is installed on the second sampling pipeline 15 , and the second connecting pipeline 18 is installed at the other end of the second isolation valve 14 .

[0041] The second detection valve 12 is installed on the connecting pipe 18, and the second detection instrument 13 is installed at the other end of the second detection valve 12.

[0042] The back-blowing valve 11 is installed on the connecting pipe 18 , and the air inlet pipe 10 is installed at the other end of the back-blowing valve 11 .

[0043] Normal sampling status of measuring instrument 2 17: close isolation valve 2 14 and open sampling valve 2 16 for normal sampling.

[0044] Measuring instrument-8 normal sampling status: close isolation valve-5, and open sampling valve-7 for normal sampling.

[0045] Sampling pipeline 15 blockage detection status: close sampling valve 16 and open isolation valve 5, and open detection valve 3 and back-blowing valve 2. Then, use less than 0.5 kg pressure for detection. If sampling pipeline 15 is unblocked, detection instrument 9 should have no pressure value or a very low pressure value. If detection instrument 9 has a pressure value or the pressure value exceeds the allowable value, it can be determined that the sampling pipeline is blocked and back-blowing is required.

[0046] When the sampling pipeline 15 is blocked, the measuring instrument 8 can be operated in the sampling and measuring state.

[0047] Sampling pipeline 215 purging state: close sampling valve 17 and detection valve 13, and at the same time close detection instrument 19 and detection instrument 213 to prevent the backwash pressure value from being too high to damage detection instrument 19 and detection instrument 213.

[0048] Open the isolation valve 5 and the back-blowing valve 2 to carry out the purging work. The purging and detection control can be completed by a programmable logic control system.

[0049] After purging for a certain period of time, the purge state is turned off and the sampling pipeline 15 blockage detection state is turned on. If the sampling pipeline 15 passes the detection, the normal sampling state is entered. If the detection fails, the pipeline purge state is re-entered. This cycle is repeated until the sampling pipeline 15 passes the purge and can enter the normal sampling state.

[0050] Detection component 1 and detection component 2 are backup for each other. When detection component 2 enters the sampling state, detection component 1 can perform backflush work. When detection component 1 enters the sampling state after backflush is completed, detection component 2 can enter backflush work. When backflush of detection component 1 or detection component 2 is completed, detection component 1 or detection component 2 can enter the sampling state and perform sampling by average sampling method.

[0051] The current sampling device is used as follows Figure 2 As shown, generally one end of the sampling tube is directly connected to the medium pipeline, and the other end is installed on the detector.

[0052] The existing sampling devices have the following disadvantages:

[0053] 1. Unable to accurately judge the degree of blockage of the sampling tube and whether it is blocked

[0054] 2. After the sampling tube is blocked, it is impossible to clean and dredge the sampling tube online

[0055] 3. When unclogging the sampling tube, the system needs to be stopped, which has a great impact on the operation of the entire system.

[0056] 4. The stability of a single measuring instrument is relatively poor, and measurement deviations are prone to occur and cannot be corrected in time.

[0057] By setting up detection component 1 and detection component 2 as backup for each other, when the sampling pipeline 2 15 is being detected, the measuring instrument 1 8 can perform sampling detection normally, so that the normal sampling of the measuring instrument 8 is not delayed while the sampling pipeline 2 15 is being detected, thereby avoiding frequent detection of the patency of the sampling pipeline 2 15, and the need to stop sampling back and forth to reduce the sampling efficiency, thereby ensuring the sampling efficiency when detecting the sampling pipeline 2 15.

[0058] Since there is a problem of poor sampling flow in the sampling pipe 15 or the sampling pipe 16, by setting the air inlet pipe 1 and the air inlet pipe 2 10, compressed air is injected into the interior of the sampling pipe 16 and the sampling pipe 2 15 through the air inlet pipe 11 and the air inlet pipe 2 10 for purging, thereby achieving the effect of cleaning the interior of the sampling pipe 16 and the sampling pipe 2 15, and ensuring the smoothness of sampling in the sampling pipe 16 and the sampling pipe 2 15.

[0059] Working principle:

[0060] Normal sampling status of measuring instrument 2 17: close isolation valve 2 14 and open sampling valve 2 16 for normal sampling.

[0061] Measuring instrument-8 normal sampling status: close isolation valve-5, and open sampling valve-7 for normal sampling.

[0062] Sampling pipeline 15 blockage detection status: close sampling valve 16 and open isolation valve 5 at the same time, and open detection valve 3 and back-blowing valve 2, then use pressure to detect and observe the reading of detection instrument 9.

[0063] Sampling pipeline 215 purging state: close sampling valve 17 and detection valve 13, and at the same time close detection instrument 19 and detection instrument 213 to prevent the backwash pressure value from being too high to damage detection instrument 19 and detection instrument 213.

[0064] Open the isolation valve 5 and the back-blowing valve 2 to carry out the purging work. The purging and detection control can be completed by a programmable logic control system.

[0065] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A sampling tube blockage detection device with a purge function, characterized in that: include: Medium pipeline (19); The detection component 1 is arranged on the medium pipeline (19), and comprises an air inlet pipeline 1 (1), a backflush valve 1 (2), a detection valve 1 (3), a connecting pipeline 1 (4), an isolation valve 1 (5), a sampling pipeline 1 (6), a sampling valve 1 (7) and a measuring instrument 1 (8), wherein the sampling pipeline 1 (6) is welded to the medium pipeline (19), the sampling valve 1 (7) is installed on the sampling pipeline 1 (6), and the measuring instrument 1 (8) is installed at the other end of the sampling valve 1 (7); The second detection component is arranged on the medium pipeline (19), and the second detection component comprises a second air inlet pipeline (10), a second backflush valve (11), a second detection valve (12), a second detection instrument (13), a second isolation valve (14), a second sampling pipeline (15), a second sampling valve (16), a second measuring instrument (17) and a second connecting pipeline (18). The second sampling pipeline (15) is welded to the medium pipeline (19), the second sampling valve (16) is installed on the second sampling pipeline (15), and the second measuring instrument (17) is installed at the other end of the second sampling valve (16); The detection component three is arranged on the medium pipeline (19), and the detection component three comprises a sampling pipeline three (20) and a measuring instrument three (21). The sampling pipeline three (20) is welded to the medium pipeline (19), and the measuring instrument three (21) is installed at the other end of the sampling pipeline three (20).

2. A sampling tube blockage detection device with a purge function according to claim 1, characterized in that: The isolation valve (5) is installed on the sampling pipeline (6), and the connecting pipeline (4) is installed on the other end of the isolation valve (5).

3. The sampling tube blockage detection device with a purging function according to claim 1, characterized in that: The detection valve (3) is installed on the connecting pipe (4), and the detection instrument (9) is installed on the other end of the detection valve (3).

4. The sampling tube blockage degree detection device with a purge function according to claim 1, characterized in that: The back-blowing valve (2) is installed on the connecting pipe (4), and the air inlet pipe (1) is installed on the other end of the back-blowing valve (2).

5. The sampling tube blockage detection device with a purging function according to claim 1, characterized in that: The second isolation valve (14) is installed on the second sampling pipeline (15), and the second connecting pipeline (18) is installed on the other end of the second isolation valve (14).

6. The sampling tube blockage detection device with a purging function according to claim 1, characterized in that: The second detection valve (12) is installed on the second connecting pipe (18), and the second detection instrument (13) is installed at the other end of the second detection valve (12).

7. The sampling tube blockage detection device with a purging function according to claim 1, characterized in that: The second back-blowing valve (11) is installed on the second connecting pipe (18), and the second air inlet pipe (10) is installed on the other end of the second back-blowing valve (11).

Images