Differential pressure sampling pipeline purging device and control system

Abstract

The invention discloses a differential pressure sampling pipeline purging device and a control system, and relates to the technical field of differential pressure sampling pipeline purging, a main body mechanism comprises a purging part, a control part and a gas compression part; the purging component comprises a differential pressure sampler body, a primary purging assembly arranged on the differential pressure sampler body, and a secondary purging assembly arranged on the differential pressure sampler body; by improving an existing differential pressure sampling pipeline purging device and a control system thereof, the purging flexibility and effectiveness are remarkably improved. Firstly, a group of control circuits are additionally arranged, and the positive pressure side purging solenoid valve and the negative pressure side purging solenoid valve are independently controlled in a DCS (Distributed Control System), so that the problem that an original system can only perform synchronous purging is solved; due to the improvement, the system can independently purge any side according to actual requirements, and the purge pertinence and efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of differential pressure sampling pipeline purging, and in particular to a differential pressure sampling pipeline purging device and a control system. Background Art

[0002] In the power industry, in order to accurately monitor and control the operating status of the generator set, it is usually necessary to accurately measure the pressure of various fluids. The differential pressure sampling device is one of the key devices to achieve this goal. By measuring the differential pressure generated by the fluid on both sides of the sampling device, the flow rate of the fluid can be calculated, which is essential for evaluating equipment efficiency and monitoring process flow. However, during long-term operation, the pipeline between the sampling device and the measuring transmitter may gradually become blocked due to dust, impurities or other factors, which will not only cause measurement errors, but may also cause system failures.

[0003] Existing purge devices usually use compressed air or sound waves to clear blockages in the pipeline. In remote control mode, the system can only purge the positive pressure side and the negative pressure side at the same time, and cannot be controlled separately, which limits the effectiveness of the purge, especially when the compressed air pressure is low, the blockage may not be completely cleared. In addition, the automatic purge mechanism is usually executed based on a predetermined time interval, and it is impossible to intelligently determine whether purge is needed based on actual needs. Such a design has certain limitations, which may lead to unnecessary waste of resources or failure to detect and solve blockage problems in a timely manner. Summary of the invention

[0004] In view of the problems that the above-mentioned existing purge device purges the positive and negative pressure sides synchronously when remotely controlled, cannot be controlled separately, and automatically purges at a fixed time, is not intelligent, and is prone to residual blockage when the air pressure is low, a differential pressure sampling pipeline purge device and control system are proposed.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a purge component, a control component and a gas compression component;

[0006] The purge component is a purging object and is a part that is prone to clogging, so as to ensure that the pipeline is unobstructed; the control component is electrically connected to the purge component, and the control component is used to measure the differential pressure generated by the sampling device, convert it into an electrical signal and send it to the control system to monitor the differential pressure; the gas compression component is electrically connected to the purge component, and the gas compression component is used to transmit the compressed air sent by the large air compressor;

[0007] The purge component comprises a differential pressure sampler body, a primary purge component arranged on the differential pressure sampler body, and a secondary purge component arranged on the differential pressure sampler body.

[0008] As a preferred solution of the differential pressure sampling pipeline purging device described in the present invention, the primary purge component includes an electromagnetic valve 1 electrically connected to the differential pressure sampler body, an electromagnetic valve 2 arranged on the electromagnetic valve 1, and a sound wave sounder 1 arranged between the electromagnetic valve 1 and the electromagnetic valve 2.

[0009] As a preferred solution of the differential pressure sampling pipeline purging device described in the present invention, the solenoid valve 1 and the solenoid valve 2 are both three-way solenoid valves for realizing pipeline switching.

[0010] As a preferred embodiment of the differential pressure sampling pipeline purging device described in the present invention, the sound wave generator clears the blockage in the pipeline by converting compressed air into sound waves.

[0011] As a preferred solution of the differential pressure sampling pipeline purging device described in the present invention, the secondary purge assembly includes an electromagnetic valve three electrically connected to the differential pressure sampler body, an electromagnetic valve four arranged on the electromagnetic valve three, and a sound generator two arranged between the electromagnetic valve three and the electromagnetic valve four.

[0012] As a preferred solution of the differential pressure sampling pipeline purging device described in the present invention, the electromagnetic valve three and the electromagnetic valve four are both three-way electromagnetic valves for realizing pipeline switching.

[0013] As a preferred embodiment of the differential pressure sampling pipeline purging device described in the present invention, the sound wave generator 1 converts compressed air into sound waves to clean the blockage in the pipeline, thereby replacing the work of the sound wave generator 1.

[0014] As a preferred solution of the differential pressure sampling pipeline purging device of the present invention, the control component adopts a differential pressure transmitter, which is used to measure the differential pressure generated by the sampling device, convert it into an electrical signal and send it to the DCS to realize the monitoring of the differential pressure;

[0015] The gas compression component adopts a compressed air main pipe, and the compressed air main pipe is used to centrally supply compressed air to various terminal devices or systems that need to use compressed air.

[0016] A differential pressure sampling pipeline purging control system, comprising a differential pressure sampling pipeline purging device as claimed in any one of the claims, and:

[0017] Condition monitoring, continuously monitoring the output value of the differential pressure transmitter through the DCS distributed control system;

[0018] During the initial purge, once the differential pressure measurement value exceeds the normal range, the DCS system will trigger the purge command;

[0019] Result evaluation,After the purge is completed, the system rechecks the differential pressure measurement;

[0020] Secondary purge: If the differential pressure measurement value does not return to normal after the initial purge, the DCS system will issue a second purge command;

[0021] After the final evaluation and alarm, the system continues to monitor the differential pressure measurement value after the purge is completed.

[0022] As a preferred solution of the differential pressure sampling pipeline purge control system described in the present invention, when the purge solenoid valves on the positive pressure side and the negative pressure side are opened at the same time, the pipeline is purged with compressed air, and the purge time is generally 2 minutes.

[0023] The beneficial effects of the present invention are as follows: the present invention significantly improves the flexibility and effectiveness of purging by improving the existing differential pressure sampling pipeline purging device and its control system. First, by adding a set of control circuits and realizing independent control of the purge solenoid valves on the positive pressure side and the negative pressure side in the DCS control system, the problem that the original system can only purge synchronously is solved. This improvement enables the system to purge either side separately according to actual needs, thereby improving the pertinence and efficiency of the purge. Secondly, the present invention adds logic for judging whether the pipeline is blocked in the DCS control system, thereby realizing intelligent purge decision-making. When the differential pressure measurement value exceeds the preset range, the system can automatically start the purge program and perform multiple purge attempts according to the specific situation of the pipeline blockage until the differential pressure returns to normal or an alarm for further maintenance is issued. Such a design not only reduces unnecessary resource consumption, but also improves the response speed and fault handling capability of the system, thereby ensuring the stable operation of the differential pressure sampling system and reducing maintenance costs. In addition, by increasing the purge time and number of times, the blockage can be more effectively removed even when the compressed air pressure is low. In summary, the present invention provides a more intelligent, efficient and reliable differential pressure sampling pipeline purging solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative labor.

[0025] Figure 1 It is a schematic diagram of the overall structure of the differential pressure sampling pipeline purging device in the present invention.

[0026] Figure 2 It is a schematic diagram of the planar structure of the differential pressure sampling pipeline purging device in the present invention.

[0027] Figure 3 This is a diagram of the differential pressure sampling pipeline purge control system in the present invention.

[0028] Figure numerals: 100, purge component; 200, control component; 300, gas compression component; 101, differential pressure sampler body; 102, primary purge assembly; 103, secondary purge assembly; 102a, solenoid valve one; 102b, solenoid valve two; 102c, sound wave generator one; 103a, solenoid valve three; 103b, solenoid valve four; 103c, sound wave generator two. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0032] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0033] Example 1, reference Figure 1 to Figure 3 , which is the first embodiment of the present invention, and this embodiment provides a differential pressure sampling pipeline purging device, including a purging component 100, a control component 200 and a gas compression component 300; wherein, the purging component 100, as a purging object, is a part that is prone to blockage, so as to ensure that the pipeline is unobstructed; the control component 200 is electrically connected to the purging component 100, and the control component 200 is used to measure the differential pressure generated by the sampling device, convert it into an electrical signal and send it to the control system to realize the monitoring of the differential pressure, and the gas compression component 300 is electrically connected to the purging component 100, and the gas compression component 300 is used to transmit the compressed air delivered by a large air compressor.

[0034] The purge component 100 includes a differential pressure sampler body 101 , a primary purge assembly 102 disposed on the differential pressure sampler body 101 , and a secondary purge assembly 103 disposed on the differential pressure sampler body 101 .

[0035] The primary purge assembly 102 includes an electromagnetic valve 102a electrically connected to the differential pressure sampler body 101, an electromagnetic valve 102b disposed on the electromagnetic valve 102a, and a sound wave generator 102c disposed between the electromagnetic valve 102a and the electromagnetic valve 102b.

[0036] The electromagnetic valve 1 102a and the electromagnetic valve 2 102b are both three-way electromagnetic valves for switching the pipelines.

[0037] The sound wave generator 102c clears the blockage in the pipeline by converting compressed air into sound waves.

[0038] The differential pressure sampler body 101, as a purging object, is a part that is prone to clogging. The primary purging assembly 102 includes an electromagnetic valve 1 102a and an electromagnetic valve 2 102b, and a sound wave generator located between the two.

[0039] Specifically, solenoid valve 1 102a and solenoid valve 2 102b are both three-way solenoid valves for switching pipeline states. Sound wave generator 102c utilizes the self-excited oscillation of a high-strength titanium metal diaphragm under the action of compressed air to generate resonance in the resonant cavity, converting the potential energy of the compressed air into low-frequency sound wave energy, and clearing blockages in the pipeline through sound wave vibration.

[0040] The control component 200 is mainly a differential pressure transmitter, which converts the differential pressure generated by the sampling device into an electrical signal and transmits it to the control system DCS for monitoring. It also includes a purge solenoid valve control circuit, which is connected to the solenoid valve in the purge component 100 to control its switching state.

[0041] Operation process: When the differential pressure sampler body 101 is clogged and needs to be cleaned, the gas compression component 300 receives the compressed air from the compressor and transmits it to the purge component 100. At this time, the corresponding purge mode is selected according to the actual situation. One is compressed air purge, by adjusting the electromagnetic valve 1 102a and the electromagnetic valve 2 102b to the straight-through position, such as Figure 3 As shown, the position 1 on the electromagnetic valve 102a and the electromagnetic valve 2 102b is connected, and the position 2 on the electromagnetic valve 102a and the electromagnetic valve 2 102b is disconnected, and the compressed air is directly purged through the pipeline. The second is the sonic soot blowing mode, which is adjusted to the position of the sonic sounder by adjusting the electromagnetic valve 102a and the electromagnetic valve 2 102b to be connected. Figure 3As shown, position 2 on electromagnetic valve 102a and electromagnetic valve 2 102b is connected, and position 1 on electromagnetic valve 102a and electromagnetic valve 2 102b is disconnected. The compressed air enters the pipeline after being converted into sound waves by the sound wave generator. After that, the differential pressure transmitter continuously monitors the differential pressure value. When the differential pressure measurement value exceeds the preset range, the DCS control system triggers the purge command. After the purge is executed, the system re-evaluates the differential pressure value. If the differential pressure returns to normal, the purge is successful. Otherwise, the system will continue to perform further purge or send out an alarm signal.

[0042] Through the above structural design and working principle, the present invention provides a differential pressure sampling pipeline purging device that can flexibly switch purging modes according to actual needs and intelligently judge purging requirements, thereby effectively improving purging efficiency and system reliability.

[0043] Example 2, reference Figure 1 to Figure 3 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment, and the difference is that: the secondary purge component 103 includes an electromagnetic valve three 103a electrically connected to the differential pressure sampler body 101, an electromagnetic valve four 103b arranged on the electromagnetic valve three 103a, and a sound wave generator two 103c is arranged between the electromagnetic valve three 103a and the electromagnetic valve four 103b.

[0044] Solenoid valve three 103a and solenoid valve four 103b both use three-way solenoid valves to achieve pipeline switching.

[0045] The sound wave generator 102c clears the blockage in the pipeline by converting compressed air into sound waves, and is used to replace the work of the sound wave generator 102c.

[0046] The control component 200 uses a differential pressure transmitter, which is used to measure the differential pressure generated by the sampling device, convert it into an electrical signal and send it to the DCS to monitor the differential pressure;

[0047] The gas compression component 300 adopts a compressed air main pipe, which is used to centrally supply compressed air to various terminal devices or systems that need to use compressed air.

[0048] Among them, the secondary purge component 103 includes an electromagnetic valve three 103a, an electromagnetic valve four 103b and a sound wave generator two 103c. The electromagnetic valve three 103a and the electromagnetic valve four 103b are both three-way electromagnetic valves, and their functions are both used for switching the pipeline status. The sound wave generator two, similar to the sound wave generator one 102c, clears the blockage in the pipeline by converting compressed air into sound waves, and is used as a supplement or substitute for the sound wave generator one 102c.

[0049] The differential pressure transmitter usually adopts a high-performance sensor, which can accurately measure the differential pressure generated by the sampling device, and convert the differential pressure value into an electrical signal, which is transmitted to the DCS (distributed control system) for real-time monitoring. The purge solenoid valve control circuit is connected to the solenoid valve 1 102a, the solenoid valve 2 102b, the solenoid valve 3 103a, and the solenoid valve 4 103b, and its switch state is controlled by the DCS control system to achieve precise control of the purge process.

[0050] The rest of the structure is the same as that of Example 1.

[0051] Operation process: When additional purging is required, the electromagnetic valve 3 103a and the electromagnetic valve 4 103b are adjusted to the corresponding purging mode, one of which is compressed gas purging, and the electromagnetic valve 3 103a and the electromagnetic valve 4 103b are adjusted to the straight-through position, such as Figure 3 As shown, the electromagnetic valve 3 103a and the electromagnetic valve 4 103b are connected at position 1, and disconnected at position 2, and the compressed gas is directly purged through the pipeline. Second, in the sonic soot blowing mode, the electromagnetic valve 3 103a and the electromagnetic valve 4 103b are adjusted to the position connected to the sonic sound generator 2, as shown in FIG. Figure 3 As shown, position 2 of electromagnetic valve three 103a and electromagnetic valve four 103b is connected, and position 1 is disconnected, and the compressed air enters the pipeline after being converted into sound waves by the sound wave generator, and this cycle is repeated to achieve purging.

[0052] Example 3, reference Figure 1 to Figure 3 , which is the third embodiment of the present invention, and this embodiment is different from the second embodiment in that:

[0053] S1. Status monitoring: The output value of the differential pressure transmitter is continuously monitored through the DCS distributed control system. The system automatically reads the data of the differential pressure transmitter at a set time interval (such as once a minute) and sets the normal range threshold of the differential pressure. When the differential pressure measurement value exceeds the preset upper or lower limit, the system will consider that the pipeline may be blocked.

[0054] S2, initial purge, once the differential pressure measurement value exceeds the normal range, the DCS system will trigger the purge indicator;

[0055] S21, initial purge triggering condition: once the differential pressure measurement value is detected to be out of the normal range, the DCS system immediately triggers the purge command;

[0056] S22, purge preparation: solenoid valve 1 102a and solenoid valve 2 102b are adjusted to the straight-through position so that compressed air can directly pass through the pipeline;

[0057] S23, purge execution: compressed air enters the pipeline through the electromagnetic valve for the first purge, and the purge time is about 2 minutes (the specific time is adjusted according to the length of the pipeline and the degree of blockage).

[0058] S3, result evaluation, after the purge is completed, the system rechecks the differential pressure measurement value;

[0059] S31, Evaluation timing: After the purge is completed, the system immediately rechecks the differential pressure measurement value;

[0060] S32, Evaluation criteria: If the differential pressure measurement value returns to the normal range, it means that the purge is successful and the pipeline has been unblocked;

[0061] S33. Record feedback: The system records the success of the purge and updates the status record.

[0062] S4, Secondary purge: If the differential pressure measurement value does not return to normal after the initial purge, the DCS system will issue a second purge command;

[0063] S41, triggering condition: if the differential pressure measurement value does not return to normal after the initial purge, the DCS system will issue a second purge command;

[0064] S42, purging preparation: electromagnetic valve three 103a and electromagnetic valve four 103b are adjusted to the position of connecting to the sound wave sound generator so as to use sound waves for purging;

[0065] S43, purge execution: the second sound wave generator converts the compressed air into sound waves, and clears the blockage in the pipeline through sound wave vibration. The purge time is 10 to 15 minutes.

[0066] S5, final evaluation and alarm, after the purge is completed again, the system continues to monitor the differential pressure measurement value.

[0067] S51, Evaluation timing: After the second purge is completed, the system continues to monitor the differential pressure measurement value.

[0068] S52. Evaluation criteria: If the differential pressure measurement value returns to normal, it means that the purge is successful.

[0069] S53, Alarm mechanism: If the differential pressure measurement value is still abnormal after two purges, the system will send out an audible and visual alarm signal to prompt the operator to check and repair the pipeline.

[0070] S54, record feedback: The system records the results of the purge and saves the relevant data for subsequent analysis.

[0071] The rest of the structure is the same as that of Example 2.

[0072] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0073] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A differential pressure sampling pipeline purging device, characterized in that: It comprises a purge component (100), a control component (200) and a gas compression component (300); The purge component (100) is a purging object and is a part that is prone to clogging, so as to ensure that the pipeline is unobstructed; the control component (200) is electrically connected to the purge component (100), and the control component (200) is used to measure the differential pressure generated by the sampling device, convert it into an electrical signal and send it to the control system to monitor the differential pressure; the gas compression component (300) is electrically connected to the purge component (100), and the gas compression component (300) is used to transmit the compressed air sent by a large air compressor; The purge component (100) comprises a differential pressure sampler body (101), a primary purge assembly (102) arranged on the differential pressure sampler body (101), and a secondary purge assembly (103) arranged on the differential pressure sampler body (101).

2. A differential pressure sampling pipeline purging device as claimed in claim 1, characterized in that: The primary purge assembly (102) comprises an electromagnetic valve 1 (102a) electrically connected to the differential pressure sampler body (101), an electromagnetic valve 2 (102b) arranged on the electromagnetic valve 1 (102a), and a sound wave generator 1 (102c) arranged between the electromagnetic valve 1 (102a) and the electromagnetic valve 2 (102b).

3. A differential pressure sampling pipeline purging device as claimed in claim 2, characterized in that: The electromagnetic valve 1 (102a) and the electromagnetic valve 2 (102b) are both three-way electromagnetic valves for switching pipelines.

4. A differential pressure sampling pipeline purging device as claimed in claim 3, characterized in that: The sound wave generator 1 (102c) clears the blockage in the pipeline by converting compressed air into sound waves.

5. A differential pressure sampling pipeline purging device as claimed in claim 2, characterized in that: The secondary purge assembly (103) includes an electromagnetic valve three (103a) electrically connected to the differential pressure sampler body (101), an electromagnetic valve four (103b) arranged on the electromagnetic valve three (103a), and a sound wave generator two (103c) arranged between the electromagnetic valve three (103a) and the electromagnetic valve four (103b).

6. A differential pressure sampling pipeline purging device as claimed in claim 5, characterized in that: The electromagnetic valve three (103a) and the electromagnetic valve four (103b) are both three-way electromagnetic valves for switching pipelines.

7. A differential pressure sampling pipeline purging device as claimed in claim 6, characterized in that: The sound wave generator 1 (102c) clears the blockage in the pipeline by converting compressed air into sound waves, and is used to replace the work of the sound wave generator 1 (102c).

8. A differential pressure sampling pipeline purging device as claimed in claim 1 or 7, characterized in that: The control component (200) adopts a differential pressure transmitter, which is used to measure the differential pressure generated by the sampling device, convert it into an electrical signal and send it to the DCS to realize the monitoring of the differential pressure; The gas compression component (300) adopts a compressed air main pipe, and the compressed air main pipe is used to centrally supply compressed air to various terminal devices or systems that need to use compressed air.

9. A differential pressure sampling pipeline purge control system, characterized in that: A differential pressure sampling pipeline purging device comprising any one of claims 1 to 8, and: Condition monitoring, continuously monitoring the output value of the differential pressure transmitter through the DCS (distributed control system); During the initial purge, once the differential pressure measurement value exceeds the normal range, the DCS system will trigger the purge command; Result evaluation,After the purge is completed, the system rechecks the differential pressure measurement; Secondary purge: If the differential pressure measurement value does not return to normal after the initial purge, the DCS system will issue a second purge command; After the final evaluation and alarm, the system continues to monitor the differential pressure measurement value after the purge is completed.

10. A differential pressure sampling pipeline purge control system according to claim 9, characterized in that: in, When the purge solenoid valves on the positive pressure side and the negative pressure side are opened at the same time, compressed air is used to purge the pipeline. The purge time is generally 2 minutes.

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