CN215446638U - Automatic pressure relief system for central heating - Google Patents
Automatic pressure relief system for central heating Download PDFInfo
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- CN215446638U CN215446638U CN202122197165.0U CN202122197165U CN215446638U CN 215446638 U CN215446638 U CN 215446638U CN 202122197165 U CN202122197165 U CN 202122197165U CN 215446638 U CN215446638 U CN 215446638U
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Abstract
The utility model belongs to the technical field of central heating, and relates to an automatic pressure relief system for central heating, which is applied to one end of a heating process of a heat exchange station, wherein the heating process of the heat exchange station is communicated with a heating water supply pipeline and a heating water return pipeline, the heating water return pipeline is communicated with one end of a water replenishing pipeline, and the other end of the water replenishing pipeline is communicated with a water replenishing unit; a safety valve is arranged on the heating water return pipeline; the water supply system comprises a pressure relief pipeline, wherein one end of the pressure relief pipeline is communicated with a heating water return pipeline, the other end of the pressure relief pipeline is communicated with a water collecting tank, a pressure relief electromagnetic valve is arranged on the pressure relief pipeline, and the bottom end of the water collecting tank is communicated with a water supplementing unit through a water collecting pipeline; and a water supply pressure sensor is arranged on the heating water supply pipeline, a return water pressure sensor is arranged on the heating return water pipeline, and the pressure relief electromagnetic valve, the water supply pressure sensor and the return water pressure sensor are all connected with a control system. The utility model can release pressure to protect the heating facility from impact when the heating system has lower pressure fluctuation, thereby avoiding the heating facility damage caused by water impact and reducing the failure rate of the heating system.
Description
Technical Field
The utility model relates to an automatic pressure relief system for central heating, and belongs to the technical field of central heating.
Background
According to the heating regulation, the overpressure protection of a heating system depends on the pressure relief of a safety valve, however, the pressure relief of the conventional safety valve has some defects;
(1) the opening pressure of a safety valve of the central heating system is 0.05-0.1 MPa added to the working pressure at the installation position, and after the safety valve is opened, the seat return is slow, so that a large amount of warm water is leaked, and the operation cost is increased;
(2) when the temperature of a heating system rises, particularly a small heating system has small water capacity and rapid pressure rise, the safety valve can frequently jump, and the service life of heating facilities is influenced;
(3) the requirement of the safety valve drainage is direct drainage, and the drainage under high temperature and high pressure is easy to damage peripheral equipment and even cause personal injury.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is as follows: the central heating automatic pressure relief system is characterized in that a one-stage more sensitive and reliable automatic pressure relief protection device is added on the basis of safety valve pressure relief protection, so that when the heating system has low pressure fluctuation, heating facilities can be protected from impact through pressure relief, the heating facilities are prevented from being damaged due to water impact, the failure rate of the heating system is reduced, and the service life of the heating facilities is prolonged; high-temperature pressure relief drainage water enters the water tank, so that damage or injury accidents caused by spraying the drainage water to equipment or a person are avoided; after the high-temperature pressure-relief drain water enters the water tank, the high-temperature pressure-relief drain water can be supplemented into a heating system through a water supplementing unit, so that a large amount of dosing circulating water is prevented from being discharged to a municipal drainage system through a safety valve, and the municipal water treatment cost is reduced.
The central heating automatic pressure relief system is applied to one end of a heat exchange station heating process, the heat exchange station heating process is respectively communicated with a heating water supply pipeline and a heating water return pipeline, the heating water return pipeline is communicated with one end of a water replenishing pipeline, the other end of the water replenishing pipeline is communicated with a water replenishing unit, and a water replenishing valve is arranged on the water replenishing pipeline between the water replenishing unit and the heating water return pipeline; a safety valve is arranged on the heating water return pipeline; the water supply system comprises a pressure relief pipeline, wherein one end of the pressure relief pipeline is communicated with a heating water return pipeline, the other end of the pressure relief pipeline is communicated with a water collecting tank, a pressure relief electromagnetic valve is arranged on the pressure relief pipeline, and the bottom end of the water collecting tank is communicated with a water supplementing unit through a water collecting pipeline; and a water supply pressure sensor is arranged on the heating water supply pipeline, a return water pressure sensor is arranged on the heating return water pipeline, and the pressure relief electromagnetic valve, the water supply pressure sensor and the return water pressure sensor are all connected with a control system.
The installation point of the pressure relief electromagnetic valve has the same pressure as the installation point of the safety valve, the opening and closing pressures of the pressure relief electromagnetic valve are respectively set according to actual conditions, the opening pressure of the pressure relief electromagnetic valve is set to be lower than the opening pressure of the safety valve, namely the pressure relief electromagnetic valve is opened firstly for pressure relief before the safety valve is opened; the closing pressure of the pressure relief electromagnetic valve is set to be higher than the starting pressure of the water replenishing unit so as to avoid the short circuit of circulating water of the system, and water pressurized by the water replenishing pump directly flows into the water collecting tank; when the temperature of a heating system rises or the pressure suddenly increases due to other reasons, a water supply pressure sensor and a water return pressure sensor detect pressure signals and transmit the pressure signals to a control system, when the pressure reaches the opening pressure of a set pressure relief electromagnetic valve, the pressure relief electromagnetic valve is firstly opened, a water supplementing valve is in an opening state at the moment, a water supplementing unit is in a closing state, the pressure relief water flows to a pressure relief pipeline from a heating water return pipeline, and finally flows into a water collecting tank to be collected; part of water is discharged, the pressure of the heating system is reduced, and the pressure relief electromagnetic valve is closed under the safety pressure; the water replenishing unit is also restored to a normal state. In this state, the pressure fluctuation range of the heating system is small, and the impact force on heating equipment, a pipe network, a heating user indoor heating system and the like is small; and only when the increased pressure is larger and the pressure relief solenoid valve is not enough to release the pressure, the safety valve is opened again to protect the heating system. The system is used for supplementing the pressure relief of the safety valve of the central heating system, can better protect heating facilities, reduces the failure rate of the heating system and prolongs the service life of the heating facilities. Generally, a heating water return pipeline is provided with a dirt separator, return water pressure sensors are arranged on the heating water return pipelines at two ends of the dirt separator, and a control system comprehensively judges according to signals of the pressure sensors and controls the opening and closing of the pressure relief solenoid valve.
When needed, the water in the water collecting tank can be used as a water replenishing source and enters the heating system again after passing through the water replenishing unit; the heating circulating water is softened water, the temperature of the heating circulating water is even higher between 30 ℃ and 40 ℃, the cost of 1 ton of water is about 20 yuan, the pressure relief water enters the water collecting tank and can be effectively recycled, the pressure relief water enters the water collecting tank, a large amount of dosing circulating water is prevented from being discharged to a municipal drainage system through a safety valve, the municipal water treatment cost is reduced, and the heating circulating water is energy-saving and environment-friendly.
Preferably, a gate valve is additionally arranged on the pressure relief pipeline; when the pressure relief electromagnetic valve breaks down, the gate valve is closed, and maintenance is convenient.
Preferably, the water replenishing unit comprises a communicating pipe, the communicating pipe is connected with a water replenishing pump, a check valve is arranged at the outlet end of the water replenishing pump, and when the water replenishing unit stops working, the check valve is automatically closed by pressure difference, so that the circulating water of the heating system is prevented from flowing backwards.
Compared with the prior art, the utility model has the beneficial effects that:
the automatic pressure relief protection device is reasonable in structural design, and a more sensitive and reliable automatic pressure relief protection device is added on the basis of pressure relief protection of the safety valve, so that when the pressure of a heating system is low, the heating facility can be protected from being impacted by pressure relief, the heating facility damage caused by water attack is avoided, the failure rate of the heating system is reduced, and the service life of the heating facility is prolonged; high-temperature pressure relief drainage water enters the water tank, so that damage or injury accidents caused by spraying the drainage water to equipment or a person are avoided; after the high-temperature pressure-relief drain water enters the water tank, the high-temperature pressure-relief drain water can be supplemented into a heating system through a water supplementing unit, so that a large amount of dosing circulating water is prevented from being discharged to a municipal drainage system through a safety valve, and the municipal water treatment cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a central heating automatic pressure relief system.
In the figure: 1. a heat exchange station heating process; 2. a water replenishing valve; 3. a dirt separator; 4. a water supply pressure sensor; 5. a heating water supply line; 6. a heating water return line; 7. a backwater pressure sensor; 8. a control system; 9. a water replenishing pipeline; 10. a check valve; 11. a water replenishing pump; 12. a safety valve; 13. a water collection line; 14. a water collection tank; 15. a pressure relief line; 16. a gate valve; 17. a pressure relief solenoid valve.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
as shown in fig. 1, the central heating automatic pressure relief system of the present invention is applied to one end of a heat exchange station heating process 1, the heat exchange station heating process 1 is respectively communicated with a heating water supply pipeline 5 and a heating water return pipeline 6, the heating water return pipeline 6 is communicated with one end of a water supply pipeline 9, the other end of the water supply pipeline 9 is communicated with a water supply unit, and a water supply valve 2 is arranged on the water supply pipeline 9 between the water supply unit and the heating water return pipeline 6; a safety valve 12 is arranged on the heating water return pipeline 6; the water supply system comprises a pressure relief pipeline 15, wherein one end of the pressure relief pipeline 15 is communicated with a heating water return pipeline 6, the other end of the pressure relief pipeline 15 is communicated with a water collecting tank 14, a pressure relief electromagnetic valve 17 is arranged on the pressure relief pipeline 15, and the bottom end of the water collecting tank 14 is communicated with a water supplementing unit through a water collecting pipeline 13; and a water supply pressure sensor 4 is arranged on the heating water supply pipeline 5, a return water pressure sensor 7 is arranged on the heating return water pipeline 6, and the pressure relief electromagnetic valve 17, the water supply pressure sensor 4 and the return water pressure sensor 7 are all connected with a control system 8.
In this embodiment:
a gate valve 16 is additionally arranged on the pressure relief pipeline 15; when the pressure relief electromagnetic valve 17 breaks down, the gate valve 16 is closed, so that the maintenance is convenient; the water replenishing unit comprises a communicating pipe, the communicating pipe is connected with a water replenishing pump 11, a check valve 10 is arranged on the communicating pipe at the outlet end of the water replenishing pump 11, and when the water replenishing unit stops working, the check valve 10 is automatically closed by pressure difference, so that the circulating water of the heating system is prevented from flowing backwards.
The mounting point of the pressure relief solenoid valve 17 and the mounting point of the safety valve 12 have the same pressure, and the opening and closing pressures of the pressure relief solenoid valve 17 are respectively set according to actual conditions, wherein the opening pressure of the pressure relief solenoid valve 17 is smaller than the opening pressure of the safety valve 12; when the temperature of the heating system rises or the pressure suddenly increases due to other reasons, the water supply pressure sensor 4 and the water return pressure sensor 7 detect pressure signals and transmit the pressure signals to the control system 8, when the pressure reaches the opening pressure of the set pressure relief electromagnetic valve 17, the pressure relief electromagnetic valve 17 is firstly opened, the water supplementing valve 2 is in an open state at the moment, the water supplementing unit is in a closed state, the pressure relief water flows to the pressure relief pipeline 15 from the heating water return pipeline 6, and finally flows to the water collecting tank 14 to be collected; part of water is discharged, the pressure of the heating system is reduced, and the pressure relief electromagnetic valve 17 is closed under the safety pressure; the water replenishing unit is also restored to a normal state. In this state, the pressure fluctuation range of the heating system is small, and the impact force on heating equipment, a pipe network, a heating user indoor heating system and the like is small; only when the increased pressure is larger and the pressure relief solenoid valve 17 is not enough to release the pressure, the safety valve 12 is opened again to protect the heating system. The system is used for supplementing the pressure relief of the safety valve 12 of the central heating system, is particularly suitable for small heating systems with small water capacity and large temperature fluctuation range, can better protect heating facilities, reduces the failure rate of the heating systems, and prolongs the service life of the heating facilities. The heating water return pipeline 6 is generally provided with a dirt separator 3, the heating water return pipelines 6 at two ends of the dirt separator 3 are respectively provided with a return water pressure sensor 7, and the control system comprehensively judges according to signals of the pressure sensors and controls the opening and closing of the pressure relief electromagnetic valve 17.
When needed, the water in the water collecting tank 14 can be used as a water replenishing source and enters the heating system again after passing through the water replenishing unit; the heating circulating water is softened water, the temperature of the heating circulating water is 30-50 ℃ or even higher, the cost of 1 ton of water is about 20 yuan, the pressure relief water enters the water collecting tank 14 and can be effectively recycled, the pressure relief water enters the water collecting tank 14, a large amount of dosing circulating water is prevented from being discharged to a municipal drainage system through the safety valve 12, the municipal water treatment cost is reduced, and the energy-saving and environment-friendly effects are achieved.
Claims (3)
1. A central heating automatic pressure relief system is applied to one end of a heat exchange station heating process (1), the heat exchange station heating process (1) is respectively communicated with a heating water supply pipeline (5) and a heating water return pipeline (6), the heating water return pipeline (6) is communicated with one end of a water replenishing pipeline (9), the other end of the water replenishing pipeline (9) is communicated with a water replenishing unit, and a water replenishing valve (2) is arranged on the water replenishing pipeline (9) between the water replenishing unit and the heating water return pipeline (6); a safety valve (12) is arranged on the heating water return pipeline (6); the method is characterized in that: the water supply system comprises a pressure relief pipeline (15), wherein one end of the pressure relief pipeline (15) is communicated with a heating water return pipeline (6), the other end of the pressure relief pipeline (15) is communicated with a water collecting tank (14), a pressure relief electromagnetic valve (17) is arranged on the pressure relief pipeline (15), and the bottom end of the water collecting tank (14) is communicated with a water replenishing unit through a water collecting pipeline (13); the heating water supply pipeline (5) is provided with a water supply pressure sensor (4), the heating water return pipeline (6) is provided with a water return pressure sensor (7), and the pressure relief electromagnetic valve (17), the water supply pressure sensor (4) and the water return pressure sensor (7) are all connected with a control system (8).
2. The central heating automatic pressure relief system according to claim 1, characterized in that: a gate valve (16) is additionally arranged on the pressure relief pipeline (15).
3. The central heating automatic pressure relief system according to claim 1, characterized in that: the water replenishing unit comprises a communicating pipe, the communicating pipe is connected with a water replenishing pump (11), and a check valve (10) is arranged on the communicating pipe at the outlet end of the water replenishing pump (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122197165.0U CN215446638U (en) | 2021-09-10 | 2021-09-10 | Automatic pressure relief system for central heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122197165.0U CN215446638U (en) | 2021-09-10 | 2021-09-10 | Automatic pressure relief system for central heating |
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| Publication Number | Publication Date |
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| CN215446638U true CN215446638U (en) | 2022-01-07 |
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| CN202122197165.0U Active CN215446638U (en) | 2021-09-10 | 2021-09-10 | Automatic pressure relief system for central heating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659156A (en) * | 2022-03-25 | 2022-06-24 | 西安热工研究院有限公司 | System and method for solving overpressure of secondary network system of heat supply heat exchange station |
-
2021
- 2021-09-10 CN CN202122197165.0U patent/CN215446638U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659156A (en) * | 2022-03-25 | 2022-06-24 | 西安热工研究院有限公司 | System and method for solving overpressure of secondary network system of heat supply heat exchange station |
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