CN219300518U - Temperature-reducing water bypass device of temperature-reducing pressure reducer - Google Patents
Temperature-reducing water bypass device of temperature-reducing pressure reducer Download PDFInfo
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- CN219300518U CN219300518U CN202320063059.XU CN202320063059U CN219300518U CN 219300518 U CN219300518 U CN 219300518U CN 202320063059 U CN202320063059 U CN 202320063059U CN 219300518 U CN219300518 U CN 219300518U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model discloses a temperature and pressure reducing water bypass device of a temperature and pressure reducer, which is arranged on the water inlet side of the temperature and pressure reducer and is connected with a valve bank on a main waterway in parallel, wherein the valve bank comprises a first electric control valve, a regulating valve and a first check valve which are connected in series, the valve bank comprises a first bypass and a second bypass, the first bypass is provided with a second electric control valve, and the second bypass is provided with a third electric control valve; the first bypass has an access smaller than the main waterway and larger than the second bypass. The temperature and pressure reducing water bypass device of the temperature and pressure reducing device can provide low-flow temperature and pressure reducing water to ensure the low load of a heat supply network and the normal operation of the temperature and pressure reducing device in a hot standby state.
Description
Technical Field
The utility model relates to the technical field of heat supply, temperature reduction and pressure reduction equipment, in particular to a temperature reduction water bypass device of a temperature and pressure reducer.
Background
The industrial production enterprises use the temperature-reducing pressure reducer for heat supply by utilizing the pipe network of the thermal power plant, the temperature-reducing water regulating valve of the temperature-reducing pressure reducer is designed as a regulating device when the flow rate is full, and the minimum flow rate of the regulating valve of the main temperature-reducing water supply pipeline is not less than 20t/h for the large-scale temperature-reducing pressure reducer. Therefore, the high-temperature high-pressure temperature and pressure reducer cannot ensure the exhaust parameters when in low-flow operation. The fluctuation of heat consumption load is large, the heat load is regulated by the temperature and pressure reduction device, when the heat load of a heat supply network is low, the flow of a temperature and pressure reduction water supply main pipeline regulating valve of the existing temperature and pressure reduction device cannot be regulated under a small flow, so that the temperature of outlet steam is unstable, and normal operation cannot be ensured.
Furthermore, when the heat load of the heat supply network is too low, the temperature and pressure reducing device also needs heat standby to prevent safety accidents. At this time, the temperature-reducing water main path of the temperature-reducing pressure reducer can not adjust the outlet temperature of the temperature-reducing pressure reducer, so that the temperature-reducing pressure reducer can not be used for hot standby.
Therefore, there is a need to develop a desuperheater bypass device for a desuperheater and a desuperheater.
Disclosure of Invention
The utility model aims to provide a temperature and pressure reducer temperature and water reducing bypass device which can provide low-flow temperature and water reducing to ensure low load of a heat supply network and normal operation of the temperature and pressure reducer in a hot standby state.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model relates to a temperature and pressure reducing water bypass device of a temperature and pressure reducing device, which is arranged on a water inlet side of the temperature and pressure reducing device and is arranged in parallel with a valve group on a main waterway, wherein the valve group comprises a first electric control valve, a regulating valve and a first check valve which are connected in series, the valve group comprises a first bypass and a second bypass, the first bypass is provided with a second electric control valve, and the second bypass is provided with a third electric control valve; the first bypass has an access smaller than the main waterway and larger than the second bypass.
Further, the first bypass adopts a six-way pipe with a nominal diameter, and the second bypass adopts a four-way pipe with a nominal diameter.
Further, a second check valve is connected in series to one side of the first bypass close to the temperature and pressure reduction device, and a third check valve is connected in series to one side of the second bypass close to the temperature and pressure reduction device.
Further, the three-way pipe fitting is further included, and two ends of the first bypass and the second bypass are communicated to a pipeline of the main waterway through the three-way pipe fitting; the second bypass is communicated between the branch pipes of the two tee pipe fittings.
Furthermore, one branch pipe opening and two main pipe openings of the three-way pipe fitting are connected through a flange.
Further, the first electric control valve, the second electric control valve and the third electric control valve are controlled to operate through normally open contacts of the intermediate relay KA1, the intermediate relay KA2 and the intermediate relay KA3 respectively; the intermediate relay KA1, the intermediate relay KA2 and the intermediate relay KA3 are electrically interlocked.
Compared with the prior art, the utility model has the beneficial technical effects that:
according to the temperature and pressure reduction water bypass device of the temperature and pressure reduction device, the first bypass and the second bypass are arranged in parallel through the valve group on the main water path, the temperature and pressure reduction water flow rates of the two bypasses are different, the main water path and the second bypass can be closed when a heat supply network is in low load, the first bypass is opened, and the temperature and pressure reduction device is ensured to work stably and normally when the heat supply network is in low load; when the load is too low, the main waterway and the first bypass are closed, the second bypass is opened, the temperature and pressure reducer is provided with low-flow temperature and pressure reducer, the temperature and pressure reducer is ensured to enter a hot standby state, and safety accidents are avoided. The temperature and pressure reducing water bypass device of the temperature and pressure reducing device can provide low-flow temperature and pressure reducing water to ensure the low load of a heat supply network and the normal operation of the temperature and pressure reducing device in a hot standby state.
In addition, by reasonably setting the nominal diameters of the first bypass and the second bypass, standard valve members are conveniently obtained while low-load operation is ensured. By arranging the check valves on the first bypass and the second bypass, the backward flow of the temperature reduction water can be prevented, and the safe operation of the pipeline is ensured. Through the setting of tee bend pipe fitting, if the heating network is close under the condition that need not to use bypass device when full load operation for a long time, convenient to detach first bypass and second bypass to adopt the sealed flange board end cap to seal and resume. Through the electrical interlocking setting of the electrically controlled valves on the three pipelines, the other two paths of the electrically controlled valves can be ensured to be in a closed state when one path of the electrically controlled valves is opened, the influence of the other two paths of the electrically controlled valves on the one path of the electrically controlled valves is avoided, and the operation safety, stability and reliability of the equipment are further ensured.
Drawings
The utility model is further described with reference to the following description of the drawings.
FIG. 1 is a schematic diagram of a temperature and pressure reducer temperature and water reducing bypass device;
fig. 2 is a schematic diagram of the control of the electric control valve of the present utility model.
Reference numerals illustrate: 1. a temperature and pressure reducer; 2. a main waterway; 201. a first electrically controlled valve; 202. a regulating valve; 203. a first check valve; 3. a first bypass; 301. a second electrically controlled valve; 302. a second check valve; 4. a second bypass; 401. a third electrically controlled valve; 402. a third check valve; 5. and a three-way pipe fitting.
Detailed Description
The utility model provides a temperature and pressure reducer temperature and water reducing bypass device which can provide low-flow temperature and water reducing to ensure low load of a heat supply network and normal operation of the temperature and pressure reducer in a hot standby state.
The following description of the embodiments of the present utility model will be made in detail with reference to the accompanying drawings, wherein it is apparent that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In a specific embodiment, as shown in fig. 1, the temperature and pressure reducer temperature and water reducing bypass device of the utility model is arranged on the water inlet side of the temperature and pressure reducer 1 and is arranged in parallel with a valve group on a main waterway 2, wherein the valve group comprises a first electric control valve 201, a regulating valve 202 and a first check valve 203 which are connected in series. The nominal diameter of the main water pipe of the main water way 2 is DN80, the first electric control valve 201 is used for controlling the on-off of the main water way 2, the regulating valve 202 is used for controlling water flow, however, the control of the regulating valve 202 is not accurate enough or even can not be realized when the flow is low. The utility model discloses a temperature-reducing water bypass device of a temperature-reducing pressure reducer, which comprises a first bypass 3 and a second bypass 4, wherein the first bypass 3 is provided with a second electric control valve 301, and the second bypass 4 is provided with a third electric control valve 401. The first bypass 3 has a nominal diameter smaller than the main waterway 2 and larger than the second bypass 4.
The valve group on the main waterway 2 is connected with the first bypass 3 and the second bypass 4 in parallel, the temperature reduction water flow rates of the two bypasses are different, the main waterway 2 and the second bypass 4 can be closed when the heat supply network is under low load, the first bypass 3 is opened, and the temperature reduction pressure reducer is ensured to work stably and normally under low load; when the load is too low, the main waterway 2 and the first bypass 3 are closed, the second bypass 4 is opened, the temperature and pressure reducer is provided with low-flow temperature and pressure reducer, the temperature and pressure reducer is ensured to enter a hot standby state, and safety accidents are avoided. The temperature and pressure reducing water bypass device of the temperature and pressure reducing device can provide low-flow temperature and pressure reducing water to ensure the low load of a heat supply network and the normal operation of the temperature and pressure reducing device in a hot standby state.
Specifically, as shown in fig. 1, the first bypass 3 has a nominal diameter of DN20, which is a six-way pipe, and the second bypass 4 has a nominal diameter of DN15, which is a four-way pipe. Under normal water pressure, the flow rate of the desuperheating water of the first bypass 3 is controlled to be about 12t/h, and the flow rate of the desuperheating water of the second bypass 4 is controlled to be about 7 t/h.
Specifically, as shown in fig. 1, a second check valve 302 is further connected in series to the side of the first bypass 3 close to the temperature and pressure reducer 1, and a third check valve 402 is further connected in series to the side of the second bypass 4 close to the temperature and pressure reducer 1.
By reasonably setting the nominal diameters of the first bypass 3 and the second bypass 4, standard valve members are conveniently obtained while low load operation is ensured. By arranging the check valves on the first bypass 3 and the second bypass 4, the backward flow of the desuperheating water can be prevented, and the safe operation of the pipeline is ensured.
In a specific embodiment of the present utility model, as shown in fig. 1, the temperature and pressure reducer and water reducing bypass device of the present utility model further includes a three-way pipe 5, and both ends of the first bypass 3 and the second bypass 4 are connected to the pipeline of the main waterway 2 through the three-way pipe 5. The second bypass 4 communicates between the branches of the two tee fittings 5.
Obviously, the first bypass 3 and the second bypass 4 can also be welded on the side wall of the main pipeline of the main waterway 2 respectively.
Specifically, as shown in fig. 1, one branch pipe orifice and two main pipe orifices of the three-way pipe fitting 5 are both pipe-connected by flanges.
Through the setting of tee bend pipe fitting 5, if the heating network is close under the condition that need not to use bypass device when full load operation for a long time, convenient to detach first bypass 3 and second bypass 4 to adopt the sealing flange board end cap to seal and resume.
In a specific embodiment of the present utility model, as shown in fig. 2, the first electrically controlled valve 201, the second electrically controlled valve 301, and the third electrically controlled valve 401 are controlled to operate by normally open contacts of the intermediate relay KA1, the intermediate relay KA2, and the intermediate relay KA3, respectively. The intermediate relays KA1, KA2 and KA3 are electrically interlocked, i.e. the coil power supply circuit of any intermediate relay is connected with the normally closed contacts of the other two intermediate relays in series. For example, the first electrically controlled valve 201 is in an open state, and the second electrically controlled valve 301 and the third electrically controlled valve 401 are in a closed state.
Through the electrical interlocking setting of the electrically controlled valves on the three pipelines, the other two paths of the electrically controlled valves can be ensured to be in a closed state when one path of the electrically controlled valves is opened, the influence of the other two paths of the electrically controlled valves on the one path of the electrically controlled valves is avoided, and the operation safety, stability and reliability of the equipment are further ensured.
In the embodiment, the working principle of the temperature-reducing water bypass device of the temperature-reducing pressure reducer is as follows: when the low load condition occurs in the heat supply network, if the main waterway 2 is continuously adopted to supply the desuperheating water, a great amount of superheated steam is wasted, and the steam temperature at the secondary air outlet end is unstable. At this time, the second electric control valve 301 is opened, the first bypass 3 enters into a working state for supplying the desuperheating water, the other two paths are closed, the desuperheating water is supplied at a lower flow, and the normal work of the low-load heat supply network can be stabilized. When the ultralow load condition occurs in the heat supply network, the third electric control valve 401 on the second bypass 4 is opened, the second bypass 4 enters into a working state for supplying the desuperheating water, and the other two paths are closed, so that the desuperheating water with the lowest flow rate is stably supplied under the influence of the nominal diameter of the second bypass 4, and the desuperheating pressure reducer can be kept in a hot standby state.
According to the temperature and pressure reduction water bypass device of the temperature and pressure reduction device, the valve group on the main water path 2 is provided with the first bypass 3 and the second bypass 4 in parallel, the temperature and pressure reduction water flow rates of the two bypasses are different, the main water path 2 and the second bypass 4 can be closed when a heat supply network is in low load, the first bypass 3 is opened, and the temperature and pressure reduction device is ensured to work stably and normally in low load; when the load is too low, the main waterway 2 and the first bypass 3 are closed, the second bypass 4 is opened, the temperature and pressure reducer is provided with low-flow temperature and pressure reducer, the temperature and pressure reducer is ensured to enter a hot standby state, and safety accidents are avoided. The temperature and pressure reducing water bypass device of the temperature and pressure reducing device can provide low-flow temperature and pressure reducing water to ensure the low load of a heat supply network and the normal operation of the temperature and pressure reducing device in a hot standby state. In addition, by reasonably setting the nominal diameters of the first bypass 3 and the second bypass 4, standard valve members are conveniently obtained while ensuring low load operation. By arranging the check valves on the first bypass 3 and the second bypass 4, the backward flow of the desuperheating water can be prevented, and the safe operation of the pipeline is ensured. Through the setting of tee bend pipe fitting 5, if the heating network is close under the condition that need not to use bypass device when full load operation for a long time, convenient to detach first bypass 3 and second bypass 4 to adopt the sealing flange board end cap to seal and resume. Through the electrical interlocking setting of the electrically controlled valves on the three pipelines, the other two paths of the electrically controlled valves can be ensured to be in a closed state when one path of the electrically controlled valves is opened, the influence of the other two paths of the electrically controlled valves on the one path of the electrically controlled valves is avoided, and the operation safety, stability and reliability of the equipment are further ensured.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.
Claims (6)
1. The temperature and pressure reducing water bypass device of the temperature and pressure reducing device is arranged on the water inlet side of the temperature and pressure reducing device (1) and is arranged in parallel with a valve group on a main waterway (2), wherein the valve group comprises a first electric control valve (201), a regulating valve (202) and a first check valve (203) which are connected in series, and the temperature and pressure reducing device is characterized by comprising a first bypass (3) and a second bypass (4), wherein the first bypass (3) is provided with a second electric control valve (301), and the second bypass (4) is provided with a third electric control valve (401); the diameter of the first bypass (3) is smaller than that of the main waterway (2) and larger than that of the second bypass (4).
2. The desuperheater pressure reducer desuperheater bypass device of claim 1, wherein: the first bypass (3) adopts a six-way pipe with a nominal diameter, and the second bypass (4) adopts a four-way pipe with a nominal diameter.
3. The desuperheater pressure reducer desuperheater bypass device of claim 1, wherein: the side of the first bypass (3) close to the temperature and pressure reduction device (1) is further connected with a second check valve (302) in series, and the side of the second bypass (4) close to the temperature and pressure reduction device (1) is further connected with a third check valve (402) in series.
4. The desuperheater pressure reducer desuperheater bypass device of claim 1, wherein: the three-way water pump further comprises a three-way pipe fitting (5), wherein two ends of the first bypass (3) and the second bypass (4) are communicated to a pipeline of the main waterway (2) through the three-way pipe fitting (5); the second bypass (4) is communicated between the branch pipes of the two tee pipe fittings (5).
5. The desuperheater pressure reducer desuperheater bypass device of claim 4, wherein: one branch pipe orifice and two main pipe orifices of the three-way pipe fitting (5) are connected through a flange.
6. The desuperheater pressure reducer desuperheater bypass device according to any of claims 1-5, wherein: the first electric control valve (201), the second electric control valve (301) and the third electric control valve (401) are controlled to operate through normally open contacts of an intermediate relay KA1, an intermediate relay KA2 and an intermediate relay KA3 respectively; the intermediate relay KA1, the intermediate relay KA2 and the intermediate relay KA3 are electrically interlocked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320063059.XU CN219300518U (en) | 2023-01-10 | 2023-01-10 | Temperature-reducing water bypass device of temperature-reducing pressure reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320063059.XU CN219300518U (en) | 2023-01-10 | 2023-01-10 | Temperature-reducing water bypass device of temperature-reducing pressure reducer |
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| Publication Number | Publication Date |
|---|---|
| CN219300518U true CN219300518U (en) | 2023-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320063059.XU Active CN219300518U (en) | 2023-01-10 | 2023-01-10 | Temperature-reducing water bypass device of temperature-reducing pressure reducer |
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| CN (1) | CN219300518U (en) |
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2023
- 2023-01-10 CN CN202320063059.XU patent/CN219300518U/en active Active
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