CN215863338U - Water supply control system - Google Patents
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- CN215863338U CN215863338U CN202121529220.5U CN202121529220U CN215863338U CN 215863338 U CN215863338 U CN 215863338U CN 202121529220 U CN202121529220 U CN 202121529220U CN 215863338 U CN215863338 U CN 215863338U
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Abstract
In order to solve the problem that a water supply control system in the prior art cannot well protect a heater, the utility model provides a water supply control system, which comprises a first high-pressure three-way valve and a second high-pressure three-way valve; the main medium pipeline is communicated with a first high pressure three-way valve, and the first high pressure three-way valve is communicated with a second high pressure three-way valve through a bypass pipeline; the first high pressure three-way valve is communicated with a feed water heater through a heater removing pipeline, and the feed water heater is communicated with a second high pressure three-way valve; the second high pressure three-way valve is communicated with a boiler removing pipeline; the main medium pipeline is communicated with the heater removing pipeline through a first valve; and a second valve is arranged on the heater removing pipeline. According to the embodiment of the utility model, the two high pressure three-way valves are connected in series on the main medium channel, and the two high pressure three-way valves realize the purpose of rapidly switching the medium channel through linkage, so that the smooth operation of a water supply system is ensured.
Description
Technical Field
The present invention relates to a feedwater control system.
Background
At present, high-pressure water supply systems are basically designed for domestic thermal power generating units to improve the heat efficiency, the performance requirements of equipment and valves of various systems of auxiliary systems of the large thermal power generating units are high, the working temperature of a high-pressure three-way valve of a boiler water supply system of a 600MW thermal power generating unit is 280 ℃, and the working pressure is 35.0 MPa. The parameters have higher requirements than those of a supercritical unit, and the valve is required to have better flow characteristics and higher running reliability.
The high-pressure heater is an important part of a thermal power generating set and a nuclear power generating set, and has the main functions of heating feed water by using steam extracted from the last stage of a steam turbine, realizing regenerative cycle and improving the generating efficiency of the set. When the high-pressure heater breaks down or needs to be isolated, the detection device sends a signal to close the main circuit of the high-pressure three-way valve and emergently switch the water supply to the bypass, so that the safety of the high-pressure heater is guaranteed, and the high-pressure heater is protected.
However, the existing water supply control system cannot well realize the switching of the water paths, and thus cannot play a good role in protecting the heater.
SUMMERY OF THE UTILITY MODEL
The water supply control system is provided for solving the problem that the water supply control system in the prior art can not better protect the heater.
The utility model is realized by the following technical scheme:
a feedwater control system includes a first high pressure three-way valve and a second high pressure three-way valve;
the main medium pipeline is communicated with a first high pressure three-way valve, and the first high pressure three-way valve is communicated with a second high pressure three-way valve through a bypass pipeline;
the first high pressure three-way valve is communicated with a feed water heater through a heater removing pipeline, and the feed water heater is communicated with a second high pressure three-way valve;
the second high pressure three-way valve is communicated with a boiler removing pipeline;
the main medium pipeline is communicated with the heater removing pipeline through a first valve;
and a second valve is arranged on the heater removing pipeline.
Optionally, the first high pressure three-way valve and the second high pressure three-way valve each comprise a high pressure three-way valve body;
the high pressure three-way valve body comprises a liquid chamber, a hydraulic cylinder and a valve rod connected with the hydraulic cylinder;
the valve rod body is provided with a piston, the piston is connected with the liquid chamber in a sliding and sealing mode, and the piston divides the liquid chamber into a first chamber and a second chamber;
the first chamber is in communication with a first outlet and the second chamber is in communication with a second outlet;
when the hydraulic cylinder drives the valve rod to move towards the direction of the first chamber, liquid in the first chamber is discharged through the first outlet;
when the hydraulic cylinder drives the valve rod to move towards the direction of the second chamber, liquid in the second chamber is discharged through the second outlet;
the high pressure three-way valve body also comprises a first liquid collecting cavity and a second liquid collecting cavity communicated with the first liquid collecting cavity;
the first liquid collecting cavity is provided with a first opening and a second opening;
the second liquid collecting cavity is provided with a third opening;
the end part of the valve rod is provided with a valve clack, and the valve clack is used for opening or closing the communication part of the first liquid collecting cavity and the second liquid collecting cavity; when the communication part of the first liquid collecting cavity and the second liquid collecting cavity is opened, the valve clack is in sealing contact with the second opening.
Optionally, a first chamber of the first high pressure three-way valve is communicated with the main medium pipeline through a third valve, and the first chamber of the first high pressure three-way valve is communicated with a first chamber of the second high pressure three-way valve through a first passage; the second chamber of the first high pressure three-way valve is communicated with the second high pressure three-way valve through the second chamber of the second channel.
Optionally, the first channel is communicated with the ejector through a fourth valve; and the second channel is communicated with the emptying device through a fifth valve.
Optionally, the control system further comprises a control panel, and the control panel is respectively connected with the high water level switch, the first valve, the second valve, the fourth valve and the fifth valve of the feedwater heater.
Optionally, the first valve is a fill valve, the second valve is a drain valve, the fourth valve is a snap action valve, and the fifth valve is a snap action valve.
Optionally, the hydraulic cylinder is a built-in hydraulic cylinder, and the hydraulic cylinder is installed at a communication position of the first liquid collecting cavity and the second liquid collecting cavity.
Optionally, a manual opening and closing device is arranged on the high pressure three-way valve body and provided with a hand wheel, the hand wheel is in threaded connection with one end of a pressure rod, and the other end of the pressure rod is used for abutting against the valve rod to enable the valve clack to be in sealing contact with the second opening.
Optionally, the other end of the pressure lever is connected with the high pressure three-way valve body through a first guide rod, and the valve rod is connected with the high pressure three-way valve body through a second guide rod.
Further, the valve rod comprises a first section and a second section connected with the first section, one end of the first section is connected with the piston and arranged in the liquid cavity, and the other end of the first section extends out of the liquid cavity; one end of the second section is connected with one end of the first section; the other end of the second section is connected with the valve clack, and the diameter of the first section is larger than that of the second section.
Compared with the prior art, the utility model has the following advantages and beneficial effects:
the water supply control system of the embodiment of the utility model is connected in series on the main medium channel through the two high-pressure three-way valves, and when the main medium channel needs to go away from the bypass channel, the two high-pressure three-way valves are linked to realize the purpose of rapidly switching the medium channel, thereby effectively controlling the rise of the liquid pressure in the heater-removing pipeline and ensuring the smooth operation of the water supply system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the principles of the utility model. In the drawings:
FIG. 1 is a schematic diagram of the principle structure of a feedwater control system.
Fig. 2 is a schematic diagram of the internal structure of the high pressure three-way valve.
Fig. 3 is a partially enlarged view of a in fig. 2.
Reference numbers and corresponding part names in the drawings:
1-a hand wheel, 2-a second guide rod, 3-an upper cavity water hole, 4-a copper sleeve, 5-a four-open ring, 6-a valve cover sealing ring, 7-a valve cover, 8-a sealing ring, 9-a built-in hydraulic cylinder, 10-a valve rod, 11-a valve clack, 12-a valve body, 13-a lower valve seat, 14-a sealing ring pressing ring, 15-a four-open ring pressing cover, 16-a split ring, 17-a lower cavity water hole, 18-a piston, 19-a pressing rod, 20-a liquid chamber and 21-a second liquid collecting chamber; 22-a first liquid collecting cavity, 23-a gland; 101-a discharger, 102-a first snap action valve, 103-a control panel, 104-a first chamber of a first high-pressure three-way valve, 105-a second chamber of the first high-pressure three-way valve, 106-a valve, 107-a main medium conduit, 108-a filling valve, 109-a de-heater conduit, 110-a discharge valve, 111-a de-three-way valve conduit, 112-a feed water heater, 113-a bypass conduit, 114-a second snap action valve, 115-a de-boiler conduit, 116-a second chamber of a second high-pressure three-way valve, 117-a first chamber of a second high-pressure three-way valve, 118-a second conduit, 119-a first conduit, a-a high-pressure three-way valve bypass conduit, b-a conduit leading to a high-pressure heater conduit, c-a pump outlet connected to a feed water conduit, 201-a first section, 202-second section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
2-3, the high pressure three-way valve includes a high pressure three-way valve body including a fluid chamber, a hydraulic cylinder, and a valve stem connected to the hydraulic cylinder; the valve rod body is provided with a piston, the piston is movably arranged in the liquid cavity, and the liquid cavity is divided into a first cavity and a second cavity by the piston;
the first chamber is in communication with a first outlet and the second chamber is in communication with a second outlet;
the high pressure three-way valve body also comprises a first liquid collecting cavity and a second liquid collecting cavity communicated with the first liquid collecting cavity;
the first liquid collecting cavity is provided with a first opening and a second opening;
the second liquid collecting cavity is provided with a third opening;
the end part of the valve rod is provided with a valve clack, and the valve clack is used for opening or closing the communication part of the first liquid collecting cavity and the second liquid collecting cavity; when the communication part of the first liquid collecting cavity and the second liquid collecting cavity is opened, the valve clack is in sealing contact with the second opening.
Optionally, the hydraulic cylinder body and the upper valve seat are of an integrated structure, so that the valve structure is more compact, and the hydraulic cylinder body has the functions of the upper valve seat and the hydraulic cylinder; the lower end of the hydraulic cylinder body is provided with a window, and the hydraulic cylinder body is provided with a hydraulic flow guiding inclined hole.
Liquid is directly led into the hydraulic cylinder from the hydraulic hole through the valve cover body, and discharged hydraulic medium is discharged from the hydraulic cylinder and small holes in the valve cover body without additionally arranging parts, so that the structure is very simple and effective.
The lower part of the hydraulic cylinder and the valve rod are in mechanical fit, and certain media can flow through a gap between the hydraulic cylinder and the valve rod.
Optionally, the valve rod and the valve clack are of a self-positioning circular spherical surface structure, namely the valve clack is of a circular spherical surface structure, and the highest point of the spherical surface of the valve clack, the spherical center of the circular spherical surface structure and the center of the valve rod are on the same straight line, so that the valve clack cannot generate unbalanced sealing force due to the constraint of valve rod force, can be automatically positioned at any time, and is tight and leakproof.
In order to prevent the valve clack from rotating, the valve clack and the valve rod are connected by adopting a square split nut.
Referring to fig. 2-3, the high pressure three-way valve body includes a liquid chamber 20, a hydraulic cylinder is a built-in hydraulic cylinder 9, the built-in hydraulic cylinder 9 and a valve rod 10, a piston 18 is disposed on a body of the valve rod, the piston 18 is movably disposed in the liquid chamber 20, the piston slides up and down in the liquid chamber 20, the piston and a portion above the liquid chamber form a first chamber, the piston and a portion below the liquid chamber form a second chamber, the first chamber is communicated with the upper water hole 3, and the second chamber is communicated with the lower water hole 17.
The piston is in sealed sliding connection with the liquid chamber; when the piston slides to the upper part of the liquid chamber, liquid is injected into the second chamber and simultaneously the liquid in the first chamber is discharged from the upper water hole 3; when the piston slides towards the lower part of the liquid chamber, liquid is injected into the first chamber and liquid in the second chamber is discharged from the lower chamber water hole 17.
The high pressure three-way valve body also comprises a first liquid collecting cavity and a second liquid collecting cavity; referring to FIG. 1, the first and second liquid collecting chambers are in up-and-down communication; the lower extreme of valve rod 10 is equipped with valve clack 11, and when valve clack 11 was in the sealed contact of intercommunication department with first liquid collecting cavity and second liquid collecting cavity under the drive of valve rod 10, liquid got into first liquid collecting cavity 22 from the left first opening in first liquid collecting cavity 22, and then liquid was discharged from the second opening in first liquid collecting cavity 22.
When the valve flap 11 is moved downward by the valve stem 10 to the position shown in fig. 1, liquid enters the first liquid collecting chamber 22 from the first opening on the left side of the first liquid collecting chamber 22, and then the liquid is discharged from the third opening on the right side of the second liquid collecting chamber 21.
Therefore, the high-pressure three-way valve realizes the purpose of switching the flow direction of liquid through the liquid medium control switch through the hydraulic switch structure.
Optionally, the hydraulic cylinder is a built-in hydraulic cylinder 9, and the hydraulic cylinder is installed at a communication position of the first liquid collecting cavity and the second liquid collecting cavity.
Optionally, the communication part of the built-in hydraulic cylinder and the first liquid collecting cavity is hermetically connected with the communication part of the built-in hydraulic cylinder and the second liquid collecting cavity through a sealing ring 8.
In order to facilitate manual opening and closing of the high pressure three-way valve, optionally, the high pressure three-way valve body is provided with a self-locking hand wheel, the self-locking hand wheel is in threaded connection with one end of a pressure lever, and the other end of the pressure lever is used for abutting against the valve rod to enable the valve clack to be in sealing contact with the second opening.
Referring to fig. 2, the high pressure three-way valve is provided with a self-locking hand wheel 1, and the lower end of the self-locking hand wheel is in threaded connection with the upper end of the pressure lever; the lifting of the pressure lever is realized by rotating the self-locking hand wheel, and when the pressure lever is lowered to the upper end of the valve rod, the pressure lever presses the valve rod to move downwards until the valve clack is in sealing contact with the second opening; when the compression bar rises to the upper part, the hydraulic cylinder drives the valve rod to return to the communication position of the first liquid collecting cavity and the second liquid collecting cavity, so that the valve rod is sealed with the communication position.
When the bypass operates, the self-locking hand wheel with the self-locking function firmly supports against the valve rod, so that accidents are prevented, and a guarantee is provided for preventing misoperation.
In order to facilitate the pressing rod and the valve rod to be kept at the central position, optionally, the other end of the pressing rod is connected with the high pressure three-way valve body through a first guide rod, and the valve rod is connected with the high pressure three-way valve body through a second guide rod.
Referring to fig. 2, the lower end of the pressure lever is connected with the manual opening and closing device through a first guide rod; the upper end of the valve rod is connected with the high pressure three-way valve body through a second guide rod 2.
Optionally, a valve cover of the high pressure three-way valve body is connected with the valve rod through a copper sleeve;
for the holistic sealed effect of reinforcing, be equipped with first sealing member between the valve gap of high tee valve body and the valve body, the sealing member is including the four ring opening gland 15, the four ring opening 5, sealing washer clamping ring and 14 valve gap sealing washer 6 that connect gradually.
Optionally, a second sealing element is arranged between the valve cover and the manual opening and closing device, and the second sealing element comprises a gland 23 and a split ring 16 which are connected in sequence.
According to the embodiment of the utility model, the high pressure three-way valve can adopt a conveying medium as the liquid of the first liquid collecting cavity or the second liquid collecting cavity, and the first liquid collecting cavity or the second liquid collecting cavity can be connected with the conveying pipeline for conveying the medium, so that on one hand, the on-off control of the high pressure three-way valve is realized, and on the other hand, the pressure of the conveying medium in the conveying pipeline is regulated.
Optionally, a water supply pump outlet pipeline c connected with the left side of the high pressure three-way valve and a water supply pump outlet pipeline c connected with the outlet of the water supply pump are arranged on the left side of the high pressure three-way valve; a high pressure three-way valve bypass pipeline a is arranged on the right side of the high pressure three-way valve, and a pipeline b leading to a high pressure heater is arranged on the lower side of the high pressure three-way valve; thereby be convenient for through high three-way valve realization main heating pipeline and bypass pipeline's fast switch over.
In order to realize the quick closing of the main path, the piston 18 is arranged at the upper position of the rod body, and the valve flap is driven to move along with the up-and-down movement of the piston so as to open and close the valve; in order to ensure that the valve quickly closes the main pipeline, the valve rod is designed very specially, and the valve rod of the upper piston cavity is larger than the valve rod of the lower piston cavity because the water inlet of the built-in cylinder adopts main water supply, namely the water quantity which can be injected into the upper cavity of the built-in cylinder within 5S (or within a specified time) is larger than or equal to the volume of the upper cavity (the drain valve of the lower piston cavity is opened).
The method is realized by the following steps: the valve rod 10 comprises a first section 201 and a second section 202 integrally connected with the first section, the lower end of the first section is connected with the piston 18 and arranged in the liquid cavity, and the upper end of the first section extends out of the liquid cavity; the upper end of the second section is connected with the lower end of the first section; the lower end of the second section is connected with the valve clack; the core characteristics are as follows: the diameter of the first section is greater than the diameter of the second section. Optionally, the diameter of the first section is 2-5 times the diameter of the second section.
Referring to fig. 1, when the diameter of the first section is larger than that of the second section, the valve stem diameter at the upper end of the piston is larger and the valve stem diameter at the lower end is smaller. When the main path is closed, the lower cavity of the piston begins to drain water and release pressure, the water injection amount of the upper cavity needs to be more than or equal to the volume of the upper cavity of the piston, otherwise, instantaneous vacuum is caused, and the closing speed is reduced; the water quantity which can be injected into the upper cavity of the built-in cylinder within 5S (or within a specified time) is larger than or equal to the volume of the upper cavity.
Example 2
The high pressure three-way valve of this example refers to the high pressure three-way valve of example 1.
As shown in FIG. 1, a feedwater control system includes a first high-add three-way valve and a second high-add three-way valve; the main medium pipeline is communicated with a first high pressure three-way valve, and the first high pressure three-way valve is communicated with a second high pressure three-way valve through a bypass pipeline; the first high pressure three-way valve is communicated with a feed water heater through a heater removing pipeline, and the feed water heater is communicated with a second high pressure three-way valve; the second high pressure three-way valve is communicated with a boiler removing pipeline; the main medium pipeline is communicated with the heater removing pipeline through a first valve; and a second valve is arranged on the heater removing pipeline.
Optionally, a first chamber of the first high pressure three-way valve is communicated with the main medium pipeline through a third valve, and the first chamber of the first high pressure three-way valve is communicated with a first chamber of the second high pressure three-way valve through a first passage; the second chamber of the first high pressure three-way valve is communicated with the second high pressure three-way valve through the second chamber of the second channel.
Referring to fig. 1-3, the feed water control system includes a first high-pressure three-way valve (left in fig. 1) and a second high-pressure three-way valve (right in fig. 1), the outlet conduit c of the feed water pump of the first high-pressure three-way valve is connected with the main medium conduit 107; the high pressure three-way valve bypass line a of the first high pressure three-way valve is connected to the bypass line 113 and the high pressure three-way valve line b leading to the high pressure heater is connected to the de-heater line 109.
A high pressure three-way valve bypass pipeline a of the second high pressure three-way valve is connected with a high pressure three-way valve bypass pipeline a of the first high pressure three-way valve through a bypass pipeline 113; the pipeline b of the second high pressure feeding three-way valve leading to the high pressure heater is connected with the pipeline b of the first high pressure feeding three-way valve leading to the high pressure heater through the feed water heater 112; the second high pressure three way valve is connected to feed water pump outlet line c which is connected to boiler removal line 115.
The main medium pipeline 107 is communicated with a de-heater pipeline 109 through a filling valve 108, the de-heater pipeline 109 is communicated with a feed water heater 112, and an outlet of the feed water heater 112 is communicated with a lower opening of a second high pressure feeding three-way valve through a de-three-way valve pipeline 111; the de-heater line is connected to a drain valve 110.
In a normal state, the medium in the main medium line 107, such as water, after passing through the feedwater heater, is communicated to the de-boiler line 115 through a second high-pressure three-way valve.
When the accident condition results in main medium pipeline 107 pressure great, because valve rod or piston that first height adds three-way valve and the high three-way valve that adds of second have ascending thrust all the time to, valve rod or piston that first height adds three-way valve and the high three-way valve that adds of second can the quick start upward movement switch to the bypass, thereby shortened the time of switching to the bypass, realized the fast switch bypass, make whole feedwater control system safe more effective.
The main medium pipeline 107 is connected with a first high pressure three-way valve which is communicated with a second high pressure three-way valve through a bypass pipeline 113, a first chamber 104 of the first high pressure three-way valve is communicated with the main medium pipeline through a valve 106, and the first chamber 104 of the first high pressure three-way valve is communicated with a first chamber 117 of the second high pressure three-way valve through a first channel 119; the second chamber 105 of the first high-add three-way valve communicates with the second chamber 116 of the second high-add three-way valve via a second passage 118.
When the pressure of the main medium pipeline is overlarge, a valve 106 is opened, the medium enters a first cavity 104 of a first high pressure three-way valve, and simultaneously enters a first cavity 117 of a second high pressure three-way valve through a first channel 119, so that pistons 18 of the first high pressure three-way valve and the second high pressure three-way valve move downwards, openings on the left side and the right side of the first high pressure three-way valve are communicated, and openings on the left side and the right side of the second high pressure three-way valve are communicated; so that the bypass conduit 113 is in communication with the main medium conduit 107.
When the pressure of the main medium pipeline returns to normal, the hydraulic cylinder in the first high pressure three-way valve drives the piston to move upwards, water in the second chamber 105 of the first high pressure three-way valve is discharged and simultaneously enters the second chamber 116 of the second high pressure three-way valve through the second channel 118, and the hydraulic cylinder of the second high pressure three-way valve drives the piston to move upwards, so that the bypass pipeline 113 and the main medium pipeline 107 are closed.
Optionally, the first channel is communicated with the ejector through a fourth valve; and the second channel is communicated with the emptying device through a fifth valve.
Referring to FIG. 1, the first passage 119 communicates with the flare 101 through the first snap action valve 102; the second passage 118 communicates with the flare 101 through the second snap action valve 114.
Optionally, the control system further comprises a control panel, and the control panel is respectively connected with the high water level switch, the first valve, the second valve, the fourth valve and the fifth valve of the feedwater heater.
Optionally, the first valve is a fill valve, the second valve is a drain valve, the fourth valve is a snap action valve, and the fifth valve is a snap action valve.
Referring to fig. 1, the control panel 103 is respectively connected to the high level switch, the filling valve 108, the discharging valve 110, the first snap action valve 102 and the second snap action valve 114 of the feedwater heater, and controls the high level switch and each valve of the feedwater heater, thereby realizing an automatic feedwater control process.
The first high pressure three-way valve and the second high pressure three-way valve are opened and closed by using the medium in the main medium channel, on one hand, the on-off of the bypass pipeline is realized, and on the other hand, the medium flow in the main medium channel is regulated.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A feedwater control system, comprising a first high pressure three-way valve and a second high pressure three-way valve;
the main medium pipeline is communicated with a first high pressure three-way valve, and the first high pressure three-way valve is communicated with a second high pressure three-way valve through a bypass pipeline;
the first high pressure three-way valve is communicated with a feed water heater through a heater removing pipeline, and the feed water heater is communicated with a second high pressure three-way valve;
the second high pressure three-way valve is communicated with a boiler removing pipeline;
the main medium pipeline is communicated with the heater removing pipeline through a first valve;
and a second valve is arranged on the heater removing pipeline.
2. The feedwater control system of claim 1, wherein the first high-add three-way valve and the second high-add three-way valve each comprise a high-add three-way valve body;
the high pressure three-way valve body comprises a liquid chamber, a hydraulic cylinder and a valve rod connected with the hydraulic cylinder;
the valve rod body is provided with a piston, the piston is connected with the liquid chamber in a sliding and sealing mode, and the piston divides the liquid chamber into a first chamber and a second chamber;
the first chamber is in communication with a first outlet and the second chamber is in communication with a second outlet;
when the hydraulic cylinder drives the valve rod to move towards the direction of the first chamber, liquid in the first chamber is discharged through the first outlet;
when the hydraulic cylinder drives the valve rod to move towards the direction of the second chamber, liquid in the second chamber is discharged through the second outlet;
the high pressure three-way valve body also comprises a first liquid collecting cavity and a second liquid collecting cavity communicated with the first liquid collecting cavity;
the first liquid collecting cavity is provided with a first opening and a second opening;
the second liquid collecting cavity is provided with a third opening;
the end part of the valve rod is provided with a valve clack, and the valve clack is used for opening or closing the communication part of the first liquid collecting cavity and the second liquid collecting cavity; when the communication part of the first liquid collecting cavity and the second liquid collecting cavity is opened, the valve clack is in sealing contact with the second opening.
3. The feedwater control system of claim 2, wherein the first chamber of said first high-pressure-plus-three-way valve communicates with the main media conduit through a third valve, the first chamber of said first high-pressure-plus-three-way valve communicating with the first chamber of the second high-pressure-plus-three-way valve through a first passage; the second chamber of the first high pressure three-way valve is communicated with the second high pressure three-way valve through the second chamber of the second channel.
4. The feedwater control system of claim 3, wherein said first passage communicates with a flare through a fourth valve; and the second channel is communicated with the emptying device through a fifth valve.
5. The feedwater control system of claim 4, further comprising a control panel connected to the high level switch, the first valve, the second valve, the fourth valve, and the fifth valve of the feedwater heater, respectively.
6. The feedwater control system of claim 5, wherein said first valve is a fill valve, said second valve is a drain valve, said fourth valve is a snap action valve, and said fifth valve is a snap action valve.
7. The feedwater control system of claim 2, wherein said hydraulic cylinder is an internal hydraulic cylinder, said hydraulic cylinder being mounted in communication between said first and second sumps.
8. The water supply control system as claimed in claim 2, wherein the high pressure three-way valve body is provided with a manual opening and closing device, the manual opening and closing device is provided with a hand wheel, the hand wheel is in threaded connection with one end of a pressure lever, and the other end of the pressure lever is used for pressing the valve rod to enable the valve clack to be in sealing contact with the second opening.
9. The feedwater control system of claim 8, wherein the other end of said strut is connected to the high pressure three-way valve body by a first guide rod, and said valve stem is connected to the high pressure three-way valve body by a second guide rod.
10. The feedwater control system of claim 2, wherein the valve stem comprises a first section and a second section connected to the first section, one end of the first section being connected to the piston and disposed in the liquid chamber, the other end of the first section extending out of the liquid chamber; one end of the second section is connected with one end of the first section; the other end of the second section is connected with the valve clack, and the diameter of the first section is larger than that of the second section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121529220.5U CN215863338U (en) | 2021-07-06 | 2021-07-06 | Water supply control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121529220.5U CN215863338U (en) | 2021-07-06 | 2021-07-06 | Water supply control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215863338U true CN215863338U (en) | 2022-02-18 |
Family
ID=80332818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121529220.5U Active CN215863338U (en) | 2021-07-06 | 2021-07-06 | Water supply control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215863338U (en) |
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2021
- 2021-07-06 CN CN202121529220.5U patent/CN215863338U/en active Active
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| CB03 | Change of inventor or designer information |
Inventor after: Deng Wei Inventor after: Lu Jianbang Inventor before: Deng Wei |
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| CB03 | Change of inventor or designer information |