Heating flow balance control device

Abstract

The utility model belongs to the technical field of heating, and mainly relates to a heating flow balance control device, which comprises a secondary water supply pipeline, a first water supply pipeline, a second water supply pipeline, a first water supply pipeline and a second water supply pipeline, the secondary water return pipeline comprises a first water return section and a second water return section, and one end of the second water return section is connected with the first water return section; the one-way check valve is arranged between the second water supply section and the second water return section; the circulating water pump is arranged on the second water supply section; and the electric valve is arranged on the first water return section. When the weather temperature is high, the electric valve can be adjusted to reduce the passing water quantity, so that most of the cooled return water flows to the second water supply section through the one-way check valve under the action of the circulating water pump and then flows back to the building, and therefore, cyclic utilization of water supplied to the interior of the building is realized; in this way, the temperature of the heat source end does not need to be adjusted, and meanwhile the temperature in the building can be adjusted in time.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating, and mainly relates to a heating flow balance control device. Background Art

[0002] In the winter in the north, centralized heating or distributed heating often encounters serious hydraulic imbalance in the heating secondary pipe network system, which manifests as high room temperature in nearby households and low room temperature in distant users. In order to meet the heating standards for users, the property company increases the overall temperature and flow rate of the heat source station or heat exchange station, resulting in excessive energy use and power consumption. The lack of control measures in the heating secondary pipe network system and serious hydraulic imbalance are the main factors leading to excessive heating energy consumption.

[0003] In addition, hydraulic imbalance is mainly caused by the deviation between the theoretical calculation value and the actual value of the engineering design, the actual installation and construction and deviation from the design conditions, the corrosion and blockage of pipelines caused by improper operation and maintenance during operation, and the imbalance caused by the increase or decrease of users and uneven heat consumption rate in the later period. Based on the current situation, in order to solve the hydraulic imbalance, the transformation measures and adjustments of the secondary heating pipe network were carried out in different aspects with technical and equipment investment.

[0004] In the process of transformation measures, the investment in equipment, personnel, and adjustment cycle of various methods vary greatly, and the results of the adjustment are unsatisfactory. In addition, due to the complexity of the on-site working conditions and the different abilities of the executors in the on-site transformation, the same adjustment method can also produce widely different results.

[0005] Therefore, it is necessary to adopt a variety of technical means to achieve the hydraulic balance of the secondary heating pipe network to realize the rationality and balanced distribution of heat demand among different communities, buildings and users, thereby reducing the indoor temperature that fails to meet national standards due to hydraulic imbalance and reducing the energy and electricity consumption losses in operation.

[0006] In the case where the terminal load changes due to weather changes, for example, the ambient temperature is high at noon and the water supply temperature required by the residential area is low, while the ambient temperature is low at night and the water supply temperature required by the residential area is high. If the water supply is reduced, it will cause hydraulic imbalance, resulting in substandard temperature. Utility Model Content

[0007] The utility model provides a heating flow balance control device to solve the problem in the prior art that the terminal load changes due to weather changes, the adjustment method is unreasonable, and energy waste is caused.

[0008] In order to solve the above problems, the utility model adopts the following technical solutions:

[0009] A heating flow balance control device, comprising:

[0010] A secondary water supply pipeline, comprising a first water supply section and a second water supply section, wherein one end of the second water supply section is connected to the first water supply section, and the other end of the second water supply section is used to connect to a building to supply water to the building;

[0011] A secondary water return pipe, comprising a first water return section and a second water return section, wherein one end of the second water return section is connected to the first water return section, and the other end of the second water return section is used to connect to a building to provide water return to the building;

[0012] a one-way check valve, which is arranged between the second water supply section and the second water return section, so that the water in the second water return section can flow into the second water supply section in one direction;

[0013] A circulating water pump, which is arranged on the second water supply section to speed up the flow of water in the second water supply section into the building;

[0014] The electric valve is arranged on the first section of the water return.

[0015] It has the following beneficial effects: when the weather temperature is high and a higher water supply temperature is not required, the electric valve can be adjusted to reduce the amount of water passing through, so that most of the return water that has been cooled can flow to the second water supply section through the one-way check valve under the action of the circulating water pump, and then flow back to the building, thereby realizing the recycling of the building's own internal water supply, which can timely adjust the temperature in the building and save energy at the same time.

[0016] Furthermore, a water supply temperature sensor is provided on the first water supply section to monitor the temperature of the water supply.

[0017] Furthermore, a mixed water temperature sensor is provided on the second water supply section, and the mixed water temperature sensor is located between the circulating water pump and the building.

[0018] The invention has the following beneficial effects: the temperature of the mixed supply water and return water is constantly monitored by the arranged mixed water temperature sensor.

[0019] Furthermore, a water supply pressure sensor is provided on the second water supply section, and the water supply pressure sensor is located between the mixed water temperature sensor and the building.

[0020] The invention has the following beneficial effects: it is used to monitor the water pressure in the second water supply section.

[0021] Furthermore, a return water temperature sensor is provided on the second return water section to monitor the temperature of the return water.

[0022] Furthermore, a return water pressure sensor is provided on the first return water section, and the return water pressure sensor is located upstream of the electric valve to monitor the return water pressure.

[0023] Furthermore, the control device also includes a controller, which includes an acquisition unit, an algorithm unit connected to the acquisition unit, and a control output unit connected to the algorithm unit. The acquisition unit is respectively connected to a water supply temperature sensor, a mixed water temperature sensor, a return water temperature sensor, a water supply pressure sensor, a return water pressure sensor, a circulating water pump, and an electric valve to collect data on corresponding water supply temperature, mixed water temperature, return water temperature, water supply pressure, return water pressure, valve opening, and operating status of the circulating water pump. The control output unit is respectively connected to the electric valve and the circulating water pump to perform corresponding valve opening adjustments and start and stop the circulating water pump.

[0024] It has the following beneficial effects: after the return water temperature, pressure and indoor temperature of each building are collected, they are passed to the algorithm unit after data processing. The algorithm unit performs a gradient-down iterative optimization algorithm to find the optimal flow distribution, and passes the calculated opening value to the control unit, which then outputs the control unit to control the electric regulating valves of each building and the start and stop control of the circulating water pump.

[0025] Furthermore, the electric valve is an integrated balancing valve with dynamic pressure difference electric regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present invention will become easy to understand. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0027] Figure 1 It is a schematic diagram of the structure of the utility model;

[0028] Figure 2 It is a logic control flow block diagram.

[0029] Description of reference numerals:

[0030] 1. The first section of water supply; 2. The first section of return water; 3. The second section of water supply; 4. The second section of return water; 5. Building; 6. One-way check valve; 7. Circulating water pump; 8. Electric valve; 9. Water supply temperature sensor; 10. Mixed water temperature sensor; 11. Return water temperature sensor; 12. Water supply pressure sensor; 13. Return water pressure sensor; 14. Acquisition unit; 15. Algorithm unit; 16. Control output unit. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] Various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0033] like Figure 1 As shown, a heating flow balance control device includes a secondary water supply pipe, a secondary water return pipe, a one-way check valve 6, a circulating water pump 7 and an electric valve 8, wherein the secondary water supply pipe includes a first water supply section 1 and a second water supply section 3, and the secondary water return pipe includes a first water return section 2 and a second water return section 4. The electric valve 8 mentioned above can be a dynamic pressure difference electric regulation integrated balancing valve, such as a dynamic balance electric pressure difference regulating valve described in the Chinese patent document with application number CN201010285695.4.

[0034] Specifically, one end of the second water supply section 3 is connected to the first water supply section 1, and the other end of the second water supply section 3 is used to connect to the pipe in the building 5 to supply water to the building 5. One end of the second return water section 4 is connected to the first return water section 2, and the other end of the second return water section 4 is used to connect to the pipe in the building 5 to supply return water to the building 5. That is, the water in the first water supply section 1 flows into the second water supply section 3, and then flows into the pipe in the building 5 for heating, and finally flows out from the second return water section 4 and the first return water section 2 in sequence.

[0035] Specifically, the one-way check valve 6 is installed between the second water supply section 3 and the second water return section 4, so that the water in the second water return section 4 can flow into the second water supply section 3 through the one-way check valve 6, but the water in the second water supply section 3 cannot flow into the second water supply section 3 through the one-way check valve 6. The circulating water pump 7 is installed on the second water supply section 3, and the circulating water pump 7 can speed up the flow of water in the second water supply section 3 into the building 5. The electric valve 8 is installed on the first water return section 2, and the electric valve 8 can adjust the amount of water passing through.

[0036] When the weather temperature is high and a higher water supply temperature is not required, the electric valve 8 can be adjusted to reduce the amount of water passing through, so that most of the return water that has been cooled down flows to the second water supply section 3 through the one-way check valve 6 under the action of the circulating water pump 7, and then flows back to the building 5, thereby realizing the recycling of the water supply inside the building 5 itself. In this way, there is no need to adjust the temperature at the heat source end, and the temperature inside the building 5 can also be adjusted in time.

[0037] Specifically, a water supply temperature sensor 9 is installed on the first water supply section 1, so that the temperature of the water in the first water supply section 1 can be monitored. A mixed water temperature sensor 10 is installed on the second water supply section 3, and the mixed water temperature sensor 10 is located between the circulating water pump 7 and the building 5. The mixed water temperature sensor 10 can always monitor the temperature of the mixed supply water and return water. A water supply pressure sensor 12 is installed on the second water supply section 3, and the water supply pressure sensor 12 is located between the mixed water temperature sensor 10 and the building 5. The water supply pressure sensor 12 is used to monitor the pressure of the water in the second water supply section 3. A return water temperature sensor 11 is installed on the second return water section 4, and the return water temperature sensor 11 is used to monitor the temperature of the return water flowing out of the building 5. A return water pressure sensor 13 is installed on the first return water section 2, and the return water pressure sensor 13 is located upstream of the electric valve 8 to monitor the pressure of the return water.

[0038] like Figure 2 As shown, the control device also includes a controller. The controller constructed according to the design logic control principle includes an acquisition unit 14 (DI / AI module), an algorithm unit 15 (MUC) connected to the acquisition unit 14, and a control output unit 16 (AO / DO module) connected to the algorithm unit 15. The acquisition unit 14 is respectively connected to a water supply temperature sensor 9, a mixed water temperature sensor 10, a return water temperature sensor 11, a water supply pressure sensor 12, a return water pressure sensor 13, a circulating water pump 7, and an electric valve 8 to collect data on the corresponding water supply temperature, mixed water temperature, return water temperature, water supply pressure, return water pressure, valve opening, and operating status of the circulating water pump 7. The control output unit 16 is respectively connected to the electric valve 8 and the circulating water pump 7 to perform corresponding valve opening adjustments and start and stop the circulating water pump 7.

[0039] The acquisition unit 14 filters, screens, and classifies the collected data to obtain valid data, and then sends the valid data to the algorithm unit 15. The algorithm unit 15 receives the valid data transmitted by the acquisition unit 14 and searches for the algorithm formula for the optimal flow distribution according to the online gradient reduction iterative optimization algorithm. After calculation, the result data is passed to the control output unit 16. The control output unit 16 adjusts the valve opening of the electric valve 8 and starts and stops the circulating water pump 7.

[0040] The algorithm formula of its online gradient descent iterative optimization algorithm to find the optimal traffic distribution is as follows:

[0041]

[0042] Where: T pj is the average temperature of water in the secondary pipe;

[0043] △T is the contrast temperature difference;

[0044] △p is the comparative pressure difference;

[0045] n is the number of 5 buildings;

[0046] T n For the indoor temperature of each building 5;

[0047] 18 is the standard room temperature.

[0048] After the return water temperature, pressure and indoor temperature of each building 5 are collected, they are passed to the algorithm unit 15 after data processing. The algorithm unit 15 performs a gradient-down iterative optimization algorithm to find the optimal flow distribution, and passes the calculated opening value to the control unit, which then outputs the control unit to control the start and stop control of the electric regulating valve of each building 5 and the circulating water pump 7. The method of using the algorithm formula for the optimal flow distribution can also refer to the process described in the Chinese patent document with application number CN202310607325.5.

[0049] The above technical means can eliminate hydraulic imbalance, achieve large flow and small temperature difference, meet the design load in building 5, reduce heat loss and monitor heat loss, reduce personnel input, and provide load change information to the heat source end, which helps the heat source end to adjust the temperature and reduce energy consumption.

[0050] The obvious effects brought by the technology of the utility model are: 1. Realizing hydraulic balance effect in the secondary pipeline; 2. Improving the comfort of heating effect; 3. Reducing heating energy and electricity consumption costs; 4. Monitoring temperature, pressure, indoor temperature and other data in the secondary pipeline; 5. Providing a good foundation for the future construction of heating informatization.

Claims

1. A heating flow balance control device, characterized in that: include: A secondary water supply pipeline, comprising a first water supply section (1) and a second water supply section (3), wherein one end of the second water supply section (3) is connected to the first water supply section (1), and the other end of the second water supply section (3) is used to connect to a building (5) to supply water to the building (5); A secondary water return pipe, comprising a first water return section (2) and a second water return section (4), wherein one end of the second water return section (4) is connected to the first water return section (2), and the other end of the second water return section (4) is used to connect to a building (5) to provide water return to the building (5); a one-way check valve (6) disposed between the second water supply section (3) and the second water return section (4) so ​​as to allow water in the second water return section (4) to flow into the second water supply section (3) in a one-way manner; A circulating water pump (7) is arranged on the second water supply section (3) to speed up the flow of water in the second water supply section (3) into the building (5); An electric valve (8) is arranged on the first water return section (2).

2. A heating flow balance control device according to claim 1, characterized in that: The first water supply section (1) is provided with a water supply temperature sensor (9) to monitor the temperature of the water supply.

3. A heating flow balance control device according to claim 2, characterized in that: The second water supply section (3) is provided with a mixed water temperature sensor (10), and the mixed water temperature sensor (10) is located between the circulating water pump (7) and the building (5).

4. A heating flow balance control device according to claim 3, characterized in that: A water supply pressure sensor (12) is provided on the second water supply section (3), and the water supply pressure sensor (12) is located between the mixed water temperature sensor (10) and the building (5).

5. A heating flow balance control device according to claim 4, characterized in that: The second return water section (4) is provided with a return water temperature sensor (11) to monitor the temperature of the return water.

6. A heating flow balance control device according to claim 5, characterized in that: A return water pressure sensor (13) is provided on the first return water section (2). The return water pressure sensor (13) is located upstream of the electric valve (8) to monitor the return water pressure.

7. A heating flow balance control device according to claim 6, characterized in that: The control device further comprises a controller, the controller comprising a collection unit (14), an algorithm unit (15) connected to the collection unit (14), and a control output unit (16) connected to the algorithm unit (15); the collection unit (14) is respectively connected to a water supply temperature sensor (9), a mixed water temperature sensor (10), a return water temperature sensor (11), a water supply pressure sensor (12), a return water pressure sensor (13), a circulating water pump (7), and an electric valve (8) to collect data on corresponding water supply temperature, mixed water temperature, return water temperature, water supply pressure, return water pressure, valve opening, and operating status of the circulating water pump (7); the control output unit (16) is respectively connected to the electric valve (8) and the circulating water pump (7) to perform corresponding valve opening adjustment and start and stop of the circulating water pump (7).

8. A heating flow balance control device according to any one of claims 1 to 7, characterized in that: The electric valve (8) is an integrated balancing valve with dynamic pressure difference electric regulation.

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