Intelligent dosing system of heat exchange station

Abstract

The utility model discloses an intelligent dosing system of a heat exchange station, and belongs to the technical field of urban heat supply secondary pipe network maintenance equipment. The system comprises a controller, a medicament tank and a high-pressure pump, an input port of the high-pressure pump is connected with an input pipe, an output port of the high-pressure pump is connected with an output pipe, the input pipe is connected with the medicament tank through a medicament pipe, a medicament electromagnetic valve is arranged on the medicament pipe, a pressure sensor is arranged on the output pipe, and the tail end of the medicament tank is connected with each pressure area through a branch pipe which is provided with a branch electromagnetic valve and a branch check valve. Each pressure area is provided with a conductivity sensor, and a controller is electrically connected with the pressure sensors, the conductivity sensors, the chemical solenoid valves, the high-pressure pump and the branch solenoid valves. The system can automatically and accurately add chemicals according to the pressure of a pipe network, performs partition management, has the characteristics of pressure protection, function extension and the like, and can improve the descaling efficiency, reduce the cost and guarantee the stable operation of the system.

Description

Technical Field

[0001] This utility model relates to the technical field of maintenance equipment for urban heating secondary pipelines, and in particular to an intelligent chemical dosing system for heat exchange stations. Background Technology

[0002] In the maintenance of urban heating secondary pipe networks, traditional chemical dosing methods at heat exchange stations rely on manual operation, resulting in inaccurate dosing, low efficiency, and high labor costs. For pipe networks in different pressure zones, precise zoned control is impossible, leading to uneven descaling effects and significant chemical waste. Furthermore, existing systems lack real-time pressure monitoring and automatic protection mechanisms, making them susceptible to equipment damage due to overpressure. They also lack automatic flushing functions, and residual chemicals may cause pipe crystallization or corrosion, affecting the service life of the pipe network. In addition, traditional systems have limited functionality, making it difficult to accommodate the injection requirements of various additives and adapt to the diverse maintenance needs of complex pipe networks. Therefore, there is an urgent need for an automated, precise, and intelligent chemical dosing system with safety protection and expandability features. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an intelligent dosing system for heat exchange stations. This device can automatically and accurately add descaling agent according to the pressure of the secondary pipeline network, thereby improving descaling efficiency, reducing labor costs, ensuring stable and efficient operation of the heating system, and extending the service life of the pipeline.

[0004] The purpose of this utility model is achieved as follows: A smart dosing system for a heat exchange station includes a controller, a chemical tank, and a high-pressure pump. The high-pressure pump inlet is connected to an inlet pipe, and the high-pressure pump outlet is connected to an outlet pipe. The inlet pipe is connected to the chemical tank via a chemical pipe, which is equipped with a chemical solenoid valve. The outlet pipe is equipped with a pressure sensor, and the end of the outlet pipe is connected to each pressure zone via branch pipes. Each branch pipe is equipped with a branch solenoid valve and a branch check valve, and each pressure zone is equipped with a conductivity sensor. The controller is electrically connected to the pressure sensor and each conductivity sensor via an information acquisition module. The controller is electrically connected to the chemical solenoid valve, the high-pressure pump, and each branch solenoid valve via a control module.

[0005] Preferably, the number of pressure zones is 1-4. The number of pressure zones is set according to the height of the buildings in the community. When the tallest building in the community is less than 8 stories, one pressure zone can be set up. When the tallest building in the community is more than 21 stories, four pressure zones can be set up.

[0006] Preferably, a pressure protector is also installed on the output pipe. This monitors the output pipe pressure in real time and immediately shuts down the machine in case of any abnormality to prevent equipment damage.

[0007] Preferably, the high-pressure pump is a plunger-type high-pressure pump. This provides a stable high-pressure output, ensuring accurate delivery of the agent to the target area.

[0008] Preferably, it also includes a clean water tank, the input pipe is connected to the clean water tank via a clean water pipe, and the clean water pipe is equipped with a clean water solenoid valve; the controller is electrically connected to the clean water solenoid valve via a control module. After filling is completed, the controller switches to the clean water flushing mode, injecting clean water into the pipeline through the clean water tank to remove residual agents and prevent crystallization or corrosion.

[0009] Preferably, a reserved pipe is connected to the input pipe, and the reserved pipe is equipped with a reserved solenoid valve that is electrically connected to the controller. This supports the subsequent expansion of other additive injection functions and improves the compatibility of the device.

[0010] Preferably, manual valves are installed on the medicine pipe, clean water pipe, reserved pipe, and three branch pipes. These manual valves can be operated in case of solenoid valve failure, improving system reliability.

[0011] Preferably, the water tank is connected to the tap water supply via a manual valve and a full-load automatic shut-off valve on one side of the upper part. The water tank is automatically replenished, reducing manual intervention and ensuring continuous operation.

[0012] Preferably, a tap water connection is made to one side of the chemical tank via a manual valve. This is used for adding clean water to dilute the descaling agent and to clean the chemical tank.

[0013] Working principle:

[0014] This device monitors the conductivity data of pipelines in each pressure zone in real time through a controller, dynamically analyzing the degree of fouling. When the conductivity of a certain pressure zone exceeds a preset threshold, the controller opens the solenoid valve of that branch, the chemical solenoid valve, and starts the high-pressure pump. This controls the flow of descaling agent from the chemical tank to the input pipe, and the high-pressure pump pressurizes and delivers the descaling agent to the output pipe. Through the directional opening of the branch solenoid valve, the chemical agent or clean water is precisely injected into the target area. If the secondary pipeline is made of metal, after filling, the controller switches to a clean water flushing mode, injecting clean water into the pipeline through the clean water tank to remove residual chemical agent and prevent crystallization or corrosion. If the secondary pipeline is made of non-metallic pipes, there is no need to start the flushing mode. The branch check valve ensures unidirectional liquid flow and avoids backflow contamination. The pressure protector monitors the output pipe pressure in real time and automatically shuts down in case of abnormality, ensuring system safety.

[0015] Compared with the prior art, the beneficial effects of this utility model include:

[0016] 1. Automation and precise control: By linking the conductivity sensor with the controller, on-demand dispensing is achieved, avoiding human error and improving descaling efficiency.

[0017] 2. Zonal Management: Independent control for different pressure zones, adapting to complex pipeline network conditions and ensuring balanced descaling effect in each zone.

[0018] 3. Energy saving and consumption reduction: Precise filling reduces chemical waste, automatic flushing function extends pipeline life and reduces maintenance costs.

[0019] 4. Safe and reliable: The pressure protector and check valve provide dual protection to prevent system overpressure or liquid backflow, ensuring operational stability.

[0020] 5. High expandability: The reserved pipes and solenoid valves support subsequent function expansion and are compatible with various additive injection requirements, such as adding corrosion inhibitors, bactericides and algaecides. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the intelligent chemical dosing system for the heat exchange station of this utility model.

[0022] In the diagram: 1 Controller, 2 Chemical tank, 3 Clean water tank, 4 High-pressure pump, 5 Input pipe, 6 Output pipe, 7 Chemical pipe, 8 Clean water pipe, 9 Chemical solenoid valve, 10 Clean water solenoid valve, 11 Pressure sensor, 12 Branch pipe, 13 High-pressure zone, 14 Medium-pressure zone, 15 Low-pressure zone, 16 Branch solenoid valve, 17 Branch check valve, 18 Conductivity sensor, 19 Pressure protector, 20 Reserved pipe, 21 Reserved solenoid valve, 22 Automatic shut-off valve when full, 23 Manual valve. Detailed Implementation

[0023] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0024] Example 1: An intelligent chemical dosing system for a heat exchange station includes a controller 1, a chemical tank 2, a clean water tank 3, and a plunger-type high-pressure pump 4. An input pipe 5 is connected to the inlet of the plunger-type high-pressure pump 4, and an output pipe 6 is connected to the outlet of the plunger-type high-pressure pump 4. The input pipe 5 is connected to the chemical tank 2 via a chemical pipe 7 and to the clean water tank 3 via a clean water pipe 8. A reserved pipe 20 is also connected to the input pipe 5. The chemical pipe 7 is equipped with a chemical solenoid valve 9 and a manual valve 23. The clean water pipe 8 is equipped with a clean water solenoid valve 10 and a manual valve 23. The reserved pipe 20 is equipped with a reserved solenoid valve 21 and a manual valve 23. The output pipe 6 is equipped with a pressure sensor 11 and a pressure protector 19. Based on the building's highest floor being 21 stories, floors 1-7 are designated as a low-pressure zone 15, floors 8-14 as a medium-pressure zone 14, and floors 15-21 as a high-pressure zone 13. Branch pipes 12 connect to the end of the output pipe 6. The system connects the high-pressure zone 13, medium-pressure zone 14, and low-pressure zone 15. Each branch pipe 12 is equipped with a branch solenoid valve 16, a branch check valve 17, and a manual valve 23. Conductivity sensors 18 are installed in each of the high-pressure zone 13, medium-pressure zone 14, and low-pressure zone 15. The controller 1 is electrically connected to the three conductivity sensors 18 and the pressure sensor 11 through the information acquisition module. The controller 1 is also electrically connected to the three branch solenoid valves 16, the chemical solenoid valve 9, the clean water solenoid valve 10, the reserved solenoid valve 21, and the plunger-type high-pressure pump 4 through the control module. Tap water is connected to the upper side of the clean water tank 3 through the manual valve 23 and the automatic shut-off valve 22 for automatic water filling, ensuring that the clean water tank 3 always has spare clean water. Tap water is connected to the side of the chemical tank 2 through the manual valve 23 for convenient addition of tap water when preparing descaling agents.

[0025] Specific working methods:

[0026] (1) System initialization: Turn on controller 1, and set the conductivity threshold (e.g., 450±20μS / cm) and pressure safety range (0.5 - 1.5MPa) for high-pressure zone 13, medium-pressure zone 14, and low-pressure zone 15. Inject descaling agent into chemical tank 2 and clean water into clean water tank 3. The automatic shut-off valve 22 will cut off the water supply when the tank is full.

[0027] (2) Operation monitoring and injection control: The conductivity sensor 18 monitors the water quality of each area in real time (e.g., every 4-8 hours). When the conductivity of a certain area exceeds the threshold, the controller 1 triggers the injection program. The controller 1 opens the corresponding branch solenoid valve 16 and the chemical solenoid valve 9, and the plunger-type high-pressure pump 4 starts, delivering the chemical to the target area through the output pipe 6. Each injection takes 1-3 minutes.

[0028] (3) Automatic flushing process: After the filling is completed, the controller 1 closes the chemical solenoid valve 9, opens the clean water solenoid valve 10, and the plunger high pressure pump 4 switches to clean water mode to flush the pipeline for 4 to 6 minutes to remove residual chemicals.

[0029] (4) Abnormal handling mechanism: If the pressure sensor 11 detects that the pressure in the output pipe 6 exceeds the safe range, the pressure protector 19 immediately cuts off the power supply to the plunger-type high-pressure pump 4 and triggers an alarm signal. After receiving the alarm signal, the maintenance personnel shall handle the fault in a timely manner.

[0030] (5) Extended functions: The reserved pipe 20 is connected to external equipment through the reserved solenoid valve 21, which can be extended to other additive injection functions (such as adding cleaning agent to clean pipelines and heat exchangers, adding odorant to detect leaks, etc.).

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A heat exchange station intelligent dosing system, characterized in that, Including controller (1), medicament tank (2) and high pressure pump (4); The input port of high pressure pump (4) is connected with input pipe (5), and the output port is connected with output pipe (6); The input pipe (5) is connected with medicament tank (2) by medicament pipe (7), and medicament solenoid valve (9) is arranged on the medicament pipe (7); Pressure sensor (11) is arranged on the output pipe (6), and the tail end thereof is connected with each pressure area through branch pipe (12), and branch solenoid valve (16) and branch check valve (17) are arranged on each branch pipe (12); Each pressure area is provided with conductivity sensor (18); The controller (1) is electrically connected with the pressure sensor (11) and each conductivity sensor (18) through information acquisition module, and is electrically connected with the medicament solenoid valve (9), high pressure pump (4) and each branch solenoid valve (16) through control module.

2. The intelligent dosing system of a heat exchange station according to claim 1, characterized in that, The number of pressure area grades is 1-4, and is set according to the height of the cell building, when the highest building in the cell is lower than 8 layers, 1 pressure area is set, and when it is higher than 21 layers, 4 pressure areas are set. 3.The intelligent dosing system of heat exchange station of claim 1, wherein, Pressure protector (19) is further arranged on the output pipe (6), for monitoring the output pipe pressure in real time and stopping when abnormal.

4. The intelligent dosing system for heat exchange stations according to claim 1, characterized in that, The high pressure pump (4) is a plunger type high pressure pump.

5. The intelligent dosing system for heat exchange station of claim 1, wherein, Further including clean water tank (3), the input pipe (5) is connected with the clean water tank (3) by clean water pipe (8), clean water solenoid valve (10) is arranged on the clean water pipe (8), and the controller (1) is electrically connected with the clean water solenoid valve (10) through the control module.

6. The intelligent dosing system for heat exchange stations according to claim 1, characterized in that, The input pipe (5) is connected with reserved pipe (20), and reserved solenoid valve (21) is arranged on the reserved pipe (20), and the controller (1) is electrically connected with the reserved solenoid valve (21).

7. The intelligent dosing system of a heat exchange station according to claim 1 or 5 or 6, characterized in that, Manual valve (23) is arranged on the medicament pipe (7), clean water pipe (8), reserved pipe (20) and each branch pipe (12). 8.The intelligent dosing system of heat exchange station of claim 5, wherein, The upper side of the clean water tank (3) is connected with tap water through manual valve (23) and water full self-stop valve (22).

9. The intelligent dosing system of a heat exchange station according to claim 1, characterized in that, The side of the medicament tank (2) is connected with tap water through manual valve (23).

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