Anti-freezing system of sealing water system

Abstract

The utility model discloses an anti-freezing system of a sealing water system, which belongs to the technical field of pipeline cleaning and comprises a water storage tank and a functional tank. A first check valve and a purging pipeline are arranged on the circulating main pipeline on the water inlet side of the functional box; a water pump and a motor for driving the water pump are further arranged on the circulating main pipeline on the water inlet side of the first check valve; the purging pipeline is arranged between the first check valve and the function box in a communicating mode, a compression air pump is arranged at the end, away from the circulation main pipeline, of the purging pipeline, and a second check valve is arranged on the purging pipeline. The water pump and the motor provide power for sealing water circulation, and the requirements of equipment for sealing water pressure and flow are met; the compressed air pump blows in gas through the purging pipeline after shutdown, residual water in the system pipeline is blown back to the water storage tank, the second check valve prevents compressed air from flowing backwards into the circulation main pipeline, and it is guaranteed that all parts of the system are independent and safe. Therefore, no residual water in the system pipeline is ensured, and the problem of freezing is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of pipeline cleaning technology, specifically an antifreeze system for a sealed water system. Background Technology

[0002] A sealing water system is a system that provides a water source with specific pressure, flow rate and water quality requirements for the sealing parts of equipment to ensure the sealing performance of the equipment, reduce media leakage, lubricate and cool the sealing components, and ensure the normal operation of the equipment.

[0003] The water source first passes through a filtration device to remove impurities and particles, ensuring the cleanliness of the water entering the sealing parts of the equipment. Then, the water is transported to each sealing point via pipelines. During the transport process, control valves regulate the pressure and flow rate of the sealing water according to the equipment's operating requirements. Monitoring instruments monitor various parameters of the sealing water in real time; when any parameters become abnormal, the control system automatically adjusts the valve opening to maintain the stable operation of the sealing water system.

[0004] In critical areas of the paper machine, such as the wire section, press section, and drying section, the sealing water system provides sealing water to rotating parts and sealing points to prevent pulp leakage and ensure paper quality and production efficiency. At the same time, the sealing water also lubricates and cools the sealing components, reducing equipment wear.

[0005] During winter when temperatures are low, the sealing water system is prone to freezing and blockage during production workshop shutdowns for maintenance. In particular, the residual water inside the external sealing water flow switch can freeze and expand, causing the flow switch to crack and break. Personnel need to be arranged to use hot air blowers and steam to heat and melt the abnormal points in the sealing water system, and contact instrumentation personnel to replace the flow switch equipment. This greatly hinders the start-up operation, wastes manpower and resources, and increases a lot of unnecessary workload. Utility Model Content

[0006] To address the problem that residual water in sealed water system pipelines can freeze at temperatures below zero, rendering the system unusable and difficult to repair, this invention provides an antifreeze system for sealed water systems.

[0007] This utility model is achieved through the following technical solution:

[0008] An antifreeze system for a sealed water system includes a water storage tank and a function tank. The water storage tank is connected to the function tank through a main circulation pipeline. A first check valve and a purge pipeline are provided on the main circulation pipeline on the water inlet side of the function tank. A water pump and a motor for driving the water pump are also provided on the main circulation pipeline on the water inlet side of the first check valve.

[0009] The purging pipeline is connected between the first check valve and the functional box. A compressed air pump is provided at the end of the purging pipeline away from the main circulation pipeline, and a second check valve is provided on the purging pipeline.

[0010] The water storage tank and the functional tank are connected by a main circulation pipeline to form a complete circulation system, ensuring a continuous supply of sealing water. The first check valve prevents backflow of sealing water and ensures stable water flow. The water pump and motor provide power for the sealing water circulation, meeting the equipment's requirements for sealing water pressure and flow rate. The compressed air pump blows air into the system pipeline after shutdown through the purging pipeline to blow residual water in the system pipeline back to the water storage tank. The second check valve prevents compressed air from flowing back into the main circulation pipeline, ensuring the independent safety of each part of the system. This ensures that there is no residual water in the system pipeline and prevents freezing.

[0011] A further improvement of this invention is that a pressure filter is installed on the main circulation line between the water pump and the first check valve. The pressure filter can filter the sealing water entering the system, remove impurities and particles from the water, ensure the cleanliness of the sealing water entering the functional box, reduce wear and clogging of sealing components, and extend the service life of the equipment.

[0012] A further improvement of this invention is that a flow regulating valve is also provided on the main circulation pipeline between the first check valve and the functional box. This flow regulating valve can precisely adjust the flow rate of the sealing water entering the functional box according to the actual needs of the functional box, ensuring that each functional box receives the appropriate amount of water, thereby improving the system's operating efficiency and stability.

[0013] A further improvement of this invention is that the aforementioned purging pipeline is also equipped with a flow regulating valve. This valve controls the flow rate of compressed air, ensuring that compressed air with appropriate pressure and flow rate is provided when purging is required, effectively removing any water accumulation in the pipeline and preventing icing.

[0014] A further improvement of this invention is that the aforementioned compressed air pump is also equipped with a temperature sensor. After the water system is shut down, the pipeline temperature is monitored in real time, and the compressed air pump is activated when the temperature is at or below zero degrees Celsius.

[0015] A further improvement of this utility model is that several functional boxes are provided, and these functional boxes are respectively connected in parallel on the main circulation pipeline via circulation branch pipelines. This allows for the simultaneous supply of sealing water to the sealing parts of multiple devices, improving the system's versatility and applicability to meet the needs of different production scales and equipment layouts. Furthermore, each functional box is independent of the others; a failure in one functional box does not affect the normal operation of other functional boxes, thus improving system reliability and stability.

[0016] A further improvement of this invention is that a flow regulating valve is provided on the aforementioned circulating branch pipe, located on the inlet side of the functional box. This allows for individual adjustment of the inlet flow rate of each functional box, achieving flow balance among the functional boxes and improving the system's adaptability and reliability.

[0017] A further improvement of this invention is that an indoor branch pipe and an outdoor branch pipe are connected in parallel on the aforementioned circulation main pipe, and several of the aforementioned functional boxes are connected in parallel on each of the indoor and outdoor branch pipes; the temperature sensor is installed on the outdoor branch pipe. The indoor and outdoor branch pipes can adapt to the optimized layout of the sealed water system, and the temperature sensor installed on the outdoor branch pipe can promptly sense and trigger the start of the compressed air pump at the lowest temperature point in the system pipeline.

[0018] As can be seen from the above technical solution, the beneficial effects of this utility model are: the water storage tank and the functional box are connected through the main circulation pipeline to form a complete circulation system, ensuring a continuous supply of sealing water; the first check valve prevents the sealing water from flowing back and ensures the stability of the water flow direction; the water pump and motor provide power for the sealing water circulation, meeting the equipment's requirements for sealing water pressure and flow rate; the compressed air pump blows gas into the system pipeline after shutdown through the purging pipeline, blowing the residual water in the system pipeline back to the water storage tank; the second check valve prevents compressed air from flowing back into the main circulation pipeline, ensuring the independent safety of each part of the system; thus ensuring that there is no residual water in the system pipeline and that freezing will not occur. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0021] In the attached diagram: 10, water storage tank; 20, main circulation pipeline; 21, circulation branch pipeline; 22, water pump; 23, motor; 24, pressure filter; 25, first check valve; 26, flow regulating valve; 27, second check valve; 28, temperature sensor; 30, function box; 40, compressed air pump; 41, purging pipeline. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] Example 1:

[0024] As shown in Figure 1, this utility model discloses an antifreeze system for a sealing water system, including a water storage tank 10 and a function tank 30. The water storage tank 10 is connected to the function tank 30 via a main circulation pipeline 20. The water storage tank 10 and the function tank 30 are connected via the main circulation pipeline 20 to form a complete circulation system, ensuring a continuous supply of sealing water. A first check valve 25 and a purge pipeline 41 are provided on the main circulation pipeline 20 on the water inlet side of the function tank 30. A pressure filter 24 is provided on the main circulation pipeline 20 between the water pump 22 and the first check valve 25. The pressure filter 24 can filter the sealing water entering the system, removing impurities and particles from the water, ensuring the cleanliness of the sealing water entering the function tank 30, reducing wear and blockage of sealing components, and extending the service life of the equipment. A flow regulating valve 26 is also provided on the main circulation pipeline 20 between the first check valve 25 and the function tank 30. The flow regulating valve 26 can precisely adjust the flow rate of the sealing water entering the function box 30 according to the actual needs of the function box 30, ensuring that each function box 30 obtains the appropriate amount of water, and improving the system's operating efficiency and stability.

[0025] The first check valve 25 is equipped with a water pump 22 and a motor 23 that drives the water pump 22 on the main circulation pipeline 20 on the water inlet side; the first check valve 25 prevents the sealing water from flowing back and ensures the stability of the water flow direction; the water pump 22 and the motor 23 provide power for the circulation of sealing water and meet the equipment's requirements for sealing water pressure and flow rate.

[0026] The purge line 41 is connected between the first check valve 25 and the function box 30. A compressed air pump 40 is installed at the end of the purge line 41 away from the main circulation line 20, and a second check valve 27 is installed on the purge line 41. The compressed air pump 40 blows gas into the system through the purge line 41 after shutdown, blowing residual water in the system pipeline back to the water storage tank 10. The second check valve 27 prevents compressed air from flowing back into the main circulation line 20, ensuring the independent safety of each part of the system; thus ensuring that there is no residual water in the system pipeline and preventing freezing.

[0027] Example 2:

[0028] The compressed air pump 40 is also equipped with a temperature sensor 28. After the water system is shut down, the pipeline temperature is monitored in real time, and the compressed air pump 40 is activated when the temperature is at or below zero degrees Celsius.

[0029] Example 3:

[0030] Several functional boxes 30 are provided, and these functional boxes 30 are connected in parallel on the main circulation pipeline 20 via circulation branch pipelines 21. This allows for the simultaneous supply of sealing water to the sealing parts of multiple devices, improving the system's versatility and applicability to meet the needs of different production scales and equipment layouts. Furthermore, each functional box 30 is independent of the others; a failure in one functional box 30 does not affect the normal operation of the others, thus improving system reliability and stability.

[0031] Example 4:

[0032] The main circulation pipeline 20 is connected in parallel with indoor and outdoor branch pipes, and each of the indoor and outdoor branch pipes is connected in parallel with several of the aforementioned functional boxes 30; the temperature sensor 28 is installed on the outdoor branch pipe. The indoor and outdoor branch pipes can adapt to the optimized layout of the sealed water system, and the temperature sensor 28, installed on the outdoor branch pipe, can promptly sense the lowest temperature point in the system pipeline and trigger the start of the compressed air pump 40.

[0033] Example 5:

[0034] The circulation branch pipe 21 is equipped with a flow regulating valve 26, which is located on the inlet side of the functional box 30. The inlet flow rate of each functional box 30 can be adjusted individually to achieve flow balance among the functional boxes 30 and improve the adaptability and reliability of the system.

[0035] Example 6:

[0036] The purging pipeline 41 is also equipped with a flow regulating valve 26. This valve controls the flow rate of compressed air, ensuring that compressed air with appropriate pressure and flow rate is provided when purging is required, effectively removing any water accumulation in the pipeline and preventing icing.

[0037] In summary, the operating method of this device is as follows: When the sealing water system is shut down and the outdoor branch pipe temperature drops to zero degrees Celsius, the temperature sensor 28 triggers the start of the compressed air pump 40. The compressed air pump 40 blows high-pressure air into the sealing water system pipeline to purge residual water back into the water storage tank 10, ensuring no residual water remains in the pipeline and preventing freezing. The normal operating pressure of the sealing water is 4.5 bar - 5.5 bar, and the compressed air pressure is 6 bar - 7 bar.

[0038] This utility model discloses an antifreeze system for a sealing water system. A water storage tank and a functional tank are connected via a main circulation pipeline to form a complete circulation system, ensuring a continuous supply of sealing water. A first check valve prevents backflow of sealing water, ensuring stable water flow. A water pump and motor provide power for the sealing water circulation, meeting the equipment's requirements for sealing water pressure and flow rate. A compressed air pump blows air into the system pipeline after shutdown through a purging pipeline, returning residual water in the system pipeline to the water storage tank. A second check valve prevents compressed air from flowing back into the main circulation pipeline, ensuring the independent safety of each part of the system. This ensures that there is no residual water in the system pipeline, preventing freezing.

[0039] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An anti-freezing system for sealing a water system, comprising a water storage tank (10) and a function tank (30), the water storage tank (10) being communicated with the function tank (30) through a circulating main line (20); characterized in that, The first check valve (25) is arranged on the circulating main pipeline (20) of the water inlet side of the function box (30), and a purge pipeline (41) is arranged on the circulating main pipeline (20).

2. An anti-freezing system for a sealed water system according to claim 1, characterized in that The water pump (22) and the motor (23) for driving the water pump (22) are arranged on the circulating main pipeline (20) of the water inlet side of the first check valve (25).

3. An anti-freezing system for a sealed water system according to claim 1, wherein The purge pipeline (41) is arranged between the first check valve (25) and the function box (30), one end of the purge pipeline (41) away from the circulating main pipeline (20) is provided with the compressed air pump (40), and the second check valve (27) is arranged on the purge pipeline (41).

4. An anti-freezing system for a sealed water system according to claim 1, wherein The pressure filter (24) is arranged on the circulating main pipeline (20) between the water pump (22) and the first check valve (25).

5. An anti-freezing system for a sealed water system according to any one of claims 1 to 4, characterized in that The flow regulating valve (26) is further arranged on the circulating main pipeline (20) between the first check valve (25) and the function box (30).

6. An anti-freezing system for a sealed water system according to claim 5, characterized in that The flow regulating valve (26) is further arranged on the purge pipeline (41).

7. An anti-freezing system for a sealed water system according to claim 6, characterized in that The temperature sensor (28) is further arranged on the compressed air pump (40).

8. A freeze protection system for a sealed water system as defined in claim 5, wherein, The function box (30) is provided with a plurality of function boxes (30), and the plurality of function boxes (30) are connected in parallel on the circulating main pipeline (20) through the circulating branch pipelines (21). The flow regulating valve (26) is arranged on the circulating branch pipeline (21) and is located on the water inlet side of the function box (30). The indoor branch pipeline and the outdoor branch pipeline are connected in parallel on the circulating main pipeline (20), a plurality of function boxes (30) are connected in parallel on the indoor branch pipeline and the outdoor branch pipeline respectively, and the temperature sensor (28) is arranged on the outdoor branch pipeline.

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