Water level monitoring system of vacuum water tank

Abstract

The utility model relates to the technical field of water level monitoring, in particular to a water level monitoring system of a vacuum water tank, which comprises a water level gauge, the bottom end of the water level gauge is communicated with the bottom end of the vacuum water tank, and the top end of the water level gauge is communicated with the top end of the vacuum water tank; the top end of the water level gauge communicates with a clean water inlet pipe, and the bottom end of the water level gauge communicates with a sewage drainage pipe; the clean water inlet pipe is provided with a clean water switch valve, and the sewage drain pipe is provided with a sewage switch valve. In the system, high-pressure clean water enters the water level gauge of the vacuum water tank through the clean water inlet pipe to clean the water level gauge, and sewage generated after cleaning is discharged through the sewage discharge pipe. According to the system, the water level gauge can be cleaned at any time, the phenomenon that the water level gauge is jammed is reduced or even avoided, when the water level gauge is jammed, the water level gauge can be cleaned in time, the problem that the water level gauge is jammed is solved quickly and conveniently, and the reliability of the circulating water system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water level monitoring, in particular to a water level monitoring system for a vacuum water tank. Background Art

[0002] In the prior art, the circulating water system can realize accurate and flexible control of the lubricating oil temperature of the steam turbine. The circulating water vacuum tank in the system contains circulating water from the Yangtze River. The water quality is poor, especially during flood season, the water quality is dirty and the amount of sediment is large, which often causes the float of the tank water level gauge to get stuck, resulting in the water level gauge being unable to timely reflect the real water level or siphon vacuum of the vacuum tank, and it is not easy for the on-duty personnel to find it in time. Once the water level gauge gets stuck, it needs to be isolated and disassembled for cleaning, which requires a lot of maintenance work and also poses a great risk. If the water level gauge gets stuck at a high position, the vacuum environment of the circulating water vacuum tank will drop due to air leakage in the system, and the vacuum pump will not be linked in time to maintain a normal vacuum environment. When the vacuum degree continues to drop until the siphon effect is destroyed, the water inlet of the unit's circulating water pump may be interrupted, resulting in an unstoppable accident of the unit, endangering the safe operation of the unit. Utility Model Content

[0003] The utility model provides a water level monitoring system for a vacuum water tank, which can solve at least one of the above technical problems.

[0004] The utility model provides a water level monitoring system for a vacuum water tank, comprising a water level gauge, wherein the bottom end of the water level gauge is connected to the bottom end of the vacuum water tank, and the top end of the water level gauge is connected to the top end of the vacuum water tank;

[0005] The top end of the water level gauge is connected to a clean water inlet pipe, and the bottom end of the water level gauge is connected to a sewage drain pipe; the clean water inlet pipe is provided with a clean water switch valve, and the sewage drain pipe is provided with a sewage switch valve.

[0006] Optionally, the bottom end of the water level gauge has a first water hole, the bottom end of the vacuum water tank has a second water hole, the first water hole and the second water hole are connected through a first pipeline, and the first pipeline is provided with a first switch valve; the sewage drainage pipe is connected to the first pipeline, and the connection position is located between the first switch valve and the first water hole;

[0007] The top of the water level gauge has a first air vent, the top of the vacuum water tank has a second air vent, the first air vent and the second air vent are connected via a second pipe, and the second pipe is provided with a second switch valve; the clean water inlet pipe is connected to the second pipe, and the connection position is located between the second switch valve and the first air vent.

[0008] Optionally, a third pipeline is further included, one end of the third pipeline is connected to the clean water inlet pipe, and the other end is connected to the first pipeline, and the third pipeline is provided with a third switch valve;

[0009] The connecting part between the third pipeline and the clean water inlet pipe is the first connecting part, and the clean water switch valve is located between the first connecting part and the first air hole; the connecting part between the third pipeline and the first pipeline is the second connecting part, and the connecting part between the sewage drain pipe and the first pipeline is the third connecting part. The first switch valve, the second connecting part, the third connecting part and the first water hole are arranged in sequence.

[0010] Optionally, the second water hole is connected to a circulation pump inlet pipe, and the circulation pump inlet pipe is provided with an inlet switch valve; the circulation pump inlet pipe is in communication with the first pipeline.

[0011] Optionally, the second vent hole is connected to an exhaust pipeline, the exhaust pipeline is provided with an exhaust switch valve and at least one vacuum pump in sequence, and the exhaust pipeline is in communication with the second pipeline.

[0012] Optionally, there are two vacuum pumps, namely a maintaining vacuum pump and a starting vacuum pump.

[0013] Optionally, the water level gauge is provided with a first start indicator, a low water level alarm mark, a second start indicator and a stop indicator from bottom to top, the first start indicator is used to indicate whether to start the start vacuum pump, the second start indicator is used to indicate whether to start the maintenance vacuum pump, and the stop indicator is used to indicate whether to stop the start vacuum pump and the maintenance vacuum pump;

[0014] The water level monitoring system further comprises a sensor, and the sensor is used for sensing the first start indicator, the low water level alarm mark, the second start indicator and the shutdown indicator.

[0015] Optionally, the water level gauge is further provided with an extremely low water level alarm mark, and is located below the low water level alarm mark, and the sensor can sense the extremely low water level alarm mark.

[0016] Optionally, the float in the water level gauge is a magnetic float.

[0017] Optionally, a control unit is also included, which is electrically connected to the starting vacuum pump, the maintaining vacuum pump, the first switch valve, the second switch valve, the third switch valve, the clean water switch valve, the sewage switch valve and the sensor respectively.

[0018] The water level monitoring system for the vacuum water tank provided by the utility model has the following beneficial effects:

[0019] In the water level monitoring system of the vacuum water tank provided by the embodiment of the utility model, high-pressure clean water enters the water level gauge of the vacuum water tank through the clean water inlet pipe to clean the water level gauge, and the sewage generated after cleaning is discharged through the sewage drain pipe. The system can clean the water level gauge at any time, reducing or even avoiding the phenomenon of the water level gauge getting stuck, and when the water level gauge gets stuck, it can also be cleaned in time, which quickly and conveniently solves the problem of the water level gauge getting stuck and improves the reliability of the circulating water system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a water level monitoring system for a vacuum water tank provided in an embodiment of the utility model.

[0022] Description of reference numerals: 100 - water level gauge; 200 - vacuum water tank; 300 - vacuum pump maintenance; 400 - vacuum pump start; 500 - sensor; 600 - control unit

[0023] 101-clean water inlet pipe; 102-sewage drainage pipe; 103-first water hole; 104-first air hole; 105-third pipeline; 106-first connecting part; 107-second connecting part; 108-third connecting part; 109-first start indicator; 110-low water level alarm mark; 111-second start indicator; 112-stop indicator; 113-very low water level alarm mark; 114-magnetic float

[0024] 201-second water hole; 202-first pipeline; 203-second air hole; 204-second pipeline; 205-circulation pump inlet pipe; 206-air extraction pipeline

[0025] 1-clean water switch valve; 2-sewage switch valve; 3-first switch valve; 4-second switch valve; 5-third switch valve; 6-inlet switch valve; 7-exhaust switch valve. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0028] The embodiment of the utility model provides a water level monitoring system for a vacuum water tank, the system comprising a water level gauge 100, the bottom end of the water level gauge 100 is connected to the bottom end of the vacuum water tank 200, and the top end of the water level gauge 100 is connected to the top end of the vacuum water tank 200; the top end of the water level gauge 100 is connected to a clean water inlet pipe 101, and the bottom end of the water level gauge 100 is connected to a sewage drain pipe 102; the clean water inlet pipe 101 is provided with a clean water switch valve 1, and the sewage drain pipe 102 is provided with a sewage switch valve 2.

[0029] like Figure 1 As shown, the bottom end of the water level gauge 100 is connected to the bottom end of the vacuum water tank 200, and the top end of the water level gauge 100 is connected to the top end of the vacuum water tank 200. In this arrangement, according to the principle of communicating vessels, the water level changes of the water level gauge 100 and the vacuum water tank 200 are equal, and the water level changes of the vacuum tank 200 can be known from the water level changes of the water level gauge 100. In this system, high-pressure clean water enters the water level gauge 100 of the vacuum water tank 200 through the clean water inlet pipe 101 to clean the water level gauge 100, and the sewage generated after cleaning is discharged through the sewage drain pipe 102. Among them, the clean water switch valve 1 is set on the clean water inlet pipe 101. In this arrangement, when the clean water switch valve 1 is opened, the high-pressure clean water can enter the water level gauge 100 from the top end of the water level gauge 100, and clean the water level gauge 100 when the water level gauge 100 is stuck at a high water level. The sewage switch valve 2 is set in the sewage drain pipe 102. After opening the sewage switch valve 2, the sewage generated after cleaning can be discharged from the sewage drain pipe 102. The system can clean the water level meter 100 at any time, reducing or even avoiding the phenomenon of the water level meter 100 getting stuck. When the water level meter 100 gets stuck, it can also be cleaned in time. There is no need for maintenance personnel to dismantle and repair the water level meter 100, which reduces the workload, quickly and conveniently solves the problem of the water level meter 100 getting stuck, and improves the reliability of the circulating water system.

[0030] Specifically, in the water level monitoring system of the vacuum water tank provided by the embodiment of the utility model, the bottom end of the water level gauge 100 has a first water hole 103, the bottom end of the vacuum water tank has a second water hole 201, the first water hole 103 and the second water hole 201 are connected through a first pipe 202, and the first pipe 202 is provided with a first switch valve 3; the sewage drainage pipe 102 is connected to the first pipe 202, and the connection position is located between the first switch valve 3 and the first water hole 103; the top end of the water level gauge 100 has a first air hole 104, the top end of the vacuum water tank has a second air hole 203, the first air hole 104 and the second air hole 203 are connected through a second pipe 204, and the second pipe 204 is provided with a second switch valve 4; the clean water inlet pipe 101 is connected to the second pipe 204, and the connection position is located between the second switch valve 4 and the first air hole 104.

[0031] like Figure 1 As shown, the circulating water flows into the first pipeline 202 from the second water hole 201 at the bottom of the vacuum water tank 200, and then flows into the water level gauge 100 through the first water hole 103, wherein a communicating vessel is formed between the vacuum water tank 200 and the water level gauge 100, and the water level change amplitudes of the water level gauge 100 and the vacuum water tank 200 are equal, and the water level change of the vacuum tank 200 can be known from the water level change of the water level gauge 100; the cleaned sewage flows into the sewage drainage pipe 102 through the first pipeline 202, and then is discharged through the sewage drainage pipe 102, wherein the first switch valve 3 is used to control the on-off of the first pipeline 202. The air in the water level gauge 100 is discharged from the first vent 104 through the second pipeline 204, and the air in the vacuum water tank 200 is discharged from the second vent 203 to maintain the vacuum environment in the vacuum water tank 200 and the water level gauge 100, wherein the second switch valve 4 is used to control the on-off of the second pipeline 204.

[0032] Specifically, the water level monitoring system of the vacuum water tank provided by the embodiment of the utility model also includes a third pipeline 105, one end of the third pipeline 105 is connected to the clean water inlet pipe 101, and the other end is connected to the first pipeline 202, and the third pipeline 105 is provided with a third switch valve 5; the connecting part of the third pipeline 105 and the clean water inlet pipe 101 is the first connecting part 106, and the clean water switch valve 1 is located between the first connecting part 106 and the first air vent 104; the part where the third pipeline 105 is connected to the first pipeline 202 is the second connecting part 107, and the part where the sewage drainage pipe 102 is connected to the first pipeline 202 is the third connecting part 108, and the first switch valve 3, the second connecting part 107, the third connecting part 108 and the first water hole 103 are arranged in sequence.

[0033] like Figure 1As shown, the water level gauge 100 is cleaned by controlling each switch valve. The first method is to close the first switch valve 3 and open the third switch valve 5 and the second switch valve 4. At this time, clean water can enter the water level gauge 100 through the clean water inlet pipe 101, the third pipeline 105, the third switch valve 5, and the first water hole 103 in sequence, clean the water level gauge 100 and push the magnetic float to move from bottom to top. Since the clean water is a high-pressure water flow and there is a magnetic float 114 between the inner wall of the water level gauge 100, the magnetic float 114 can move upward. There is a gap, so the clean water can flow out of the water level gauge 100 from bottom to top through the gap, and flow into the vacuum water tank 200 through the second pipe 204; the second way is to close the second switch valve 4, and open the clean water switch valve 1 and the first switch valve 3. At this time, since the clean water is a high-pressure water flow, the clean water can enter the water level gauge 100 through the clean water inlet pipe 101, the first connecting part 106, the clean water switch valve 1, and the first vent 104 in sequence, clean the water level gauge 100 and push the magnetic float from top to bottom. As the magnetic float 114 and the inner wall of the water level gauge 100 have a gap, the clean water can flow out of the water level gauge 100 from top to bottom through the gap and flow into the vacuum water tank 200 through the first pipeline 202. After the cleaning work is completed, the first switch valve 3, the second switch valve 4 and the third switch valve 5 are closed, and the sewage switch valve 2 and the clean water switch valve 1 are opened. As the clean water is a high-pressure water flow, the clean water can flow through the clean water inlet pipe 101, the first connecting part 106, the clean water switch valve 103 in sequence. 1. The first vent hole 104 enters the water level gauge 100. Since there is a gap between the magnetic float 114 and the inner wall of the water level gauge 100, the clean water can discharge the sewage retained in the water level gauge 100 from the first pipeline 202 to the sewage drain pipe 102. After the sewage is discharged, the first switch valve 3 and the second switch valve 4 are restored to the normally open state to keep the water level change amplitude of the water level gauge 100 and the vacuum water tank 200 equal, and the clean water switch valve 1, the third switch valve 5 and the sewage switch valve 2 are restored to the normally closed state. The first method and the second method work together to realize the up and down movement of the float, thereby realizing the cleaning of the water level gauge 100, and can also solve the problem of the magnetic float 114 being stuck.

[0034] Specifically, in the water level monitoring system of the vacuum water tank provided by the embodiment of the utility model, the second water hole 201 is connected to the circulation pump inlet pipe 205, and the circulation pump inlet pipe 205 is provided with an inlet switch valve 6; the circulation pump inlet pipe 205 is connected to the first pipeline 202.

[0035] like Figure 1 As shown, the circulating water enters the second water hole 201 through the circulating pump inlet pipe 205 and then enters the vacuum water tank 200 through the second water hole 201 , wherein the inlet switch valve 6 is used to control the on-off of the circulating pump inlet pipe 205 .

[0036] Specifically, in the water level monitoring system of the vacuum water tank provided in the embodiment of the utility model, the second air vent 203 is connected to the exhaust pipe 206, and the exhaust pipe 206 is sequentially provided with an exhaust switch valve 7 and at least one vacuum pump, and the exhaust pipe 206 is connected to the second pipe 204.

[0037] like Figure 1 As shown, the air in the vacuum water tank 200 is discharged from the second vent hole 203 to the exhaust pipe 206, and then discharged to the external environment through the exhaust pipe 206, wherein the vacuum pump controls the air to be discharged from the exhaust pipe 206 to the external environment, and the exhaust switch valve 7 controls the on-off of the exhaust pipe 206.

[0038] Specifically, in the water level monitoring system of the vacuum water tank provided by the embodiment of the utility model, there are two vacuum pumps, namely a maintenance vacuum pump 300 and a start-up vacuum pump 400.

[0039] like Figure 1 As shown, the power required to maintain the vacuum pump 300 is less than the power required to start the vacuum pump 400 .

[0040] Specifically, in the water level monitoring system of the vacuum water tank provided by the embodiment of the utility model, the water level gauge 100 is provided with a first start indicator 109, a low water level alarm mark 110, a second start indicator 111 and a stop indicator 112 from bottom to top, the first start indicator 109 is used to indicate whether to start the vacuum pump 400, the second start indicator 111 is used to indicate whether to start the maintenance vacuum pump 300, and the stop indicator 112 is used to indicate whether to stop the start vacuum pump 400 and maintain the vacuum pump 300; the water level monitoring system also includes a sensor 500, and the sensor 500 is used to sense the first start indicator 109, the low water level alarm mark 110, the second start indicator 111 and the stop indicator 112.

[0041] like Figure 1 As shown, if the water level in the water level gauge 100 is at the first start indicator mark 109, the sensor 500 generates an indication signal for starting the vacuum pump 400; if the water level in the water level gauge 100 is at the second start indicator mark 111, the sensor 500 generates an indication signal for starting the vacuum pump 300; if the water level in the water level gauge 100 is at the stop indicator mark 112, the sensor 500 generates indication signals for stopping the start vacuum pump 400 and maintaining the vacuum pump 300; if the water level in the water level gauge 100 is at the low water level alarm mark 110, the sensor 500 generates a low water level alarm signal.

[0042] Specifically, in the water level monitoring system of the vacuum water tank provided by the embodiment of the utility model, the water level meter 100 is also provided with an extremely low water level alarm mark 113 , and is located below the low water level alarm mark 110 , and the sensor 500 can sense the extremely low water level alarm mark 113 .

[0043] like Figure 1 As shown, if the water level in the water level meter 100 is at the extremely low water level alarm mark 113, the sensor 500 generates an extremely low water level alarm signal.

[0044] Specifically, in the water level monitoring system of the vacuum water tank provided by the embodiment of the utility model, the float in the water level gauge 100 is a magnetic float 114 .

[0045] like Figure 1 As shown, the magnetic float 114 can rise or fall with the water level of the circulating water, wherein the magnetic float 114 is magnetic. Since the first start indicator 109, the low water level alarm mark 110, the second start indicator mark 111, the shutdown indicator mark 112 and the extremely low water level alarm mark 113 of the water level gauge 100 in the system are also magnetic, when the magnetic float 114 reaches the position of any of the above indicators or alarm marks, it is turned over to display the water level of the vacuum water tank 200 at this time. Through this system, the magnetic float 114 of the water level gauge 100 can be controlled to move up and down to simulate the change of water level, so as to carry out the online joint start or joint stop test of the vacuum pump and verify whether the linkage circuit and the vacuum pump can operate reliably.

[0046] Specifically, the water level monitoring system of the vacuum water tank provided in the embodiment of the utility model also includes a control unit 600, and the control unit 600 is electrically connected to the starting vacuum pump 400, the maintaining vacuum pump 300, the first switch valve 3, the second switch valve 4, the third switch valve 5, the clean water switch valve 1, the sewage switch valve 2 and the sensor 500.

[0047] like Figure 1 As shown, the control unit 600 controls the start and stop of the vacuum pump 400 and the maintenance of the vacuum pump 300 by receiving the signal generated by the sensor 500, and controls the opening and closing of the first switch valve 3, the second switch valve 4, the third switch valve 5, the clean water switch valve 1 and the sewage switch valve 2.

[0048] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "horizontal", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A water level monitoring system for a vacuum water tank, It is characterized in that It comprises a water level gauge, the bottom end of the water level gauge is connected to the bottom end of the vacuum water tank, and the top end of the water level gauge is connected to the top end of the vacuum water tank; The top end of the water level gauge is connected to a clean water inlet pipe, and the bottom end of the water level gauge is connected to a sewage drain pipe; the clean water inlet pipe is provided with a clean water switch valve, and the sewage drain pipe is provided with a sewage switch valve.

2. The water level monitoring system according to claim 1, It is characterized in that The bottom end of the water level gauge has a first water hole, the bottom end of the vacuum water tank has a second water hole, the first water hole and the second water hole are connected through a first pipeline, and the first pipeline is provided with a first switch valve; the sewage drainage pipe is connected to the first pipeline, and the connection position between the sewage drainage pipe and the first pipeline is located between the first switch valve and the first water hole; The top of the water level gauge is provided with a first air vent, the top of the vacuum water tank is provided with a second air vent, the first air vent and the second air vent are connected via a second pipe, and the second pipe is provided with a second switch valve; the clean water inlet pipe is connected to the second pipe, and the connecting position of the clean water inlet pipe and the second pipe is located between the second switch valve and the first air vent.

3. The water level monitoring system according to claim 2, It is characterized in that It also includes a third pipeline, one end of which is connected to the clean water inlet pipe, and the other end of which is connected to the first pipeline, and the third pipeline is provided with a third switch valve; The connecting part between the third pipeline and the clean water inlet pipe is the first connecting part, and the clean water switch valve is located between the first connecting part and the first air hole; the connecting part between the third pipeline and the first pipeline is the second connecting part, and the connecting part between the sewage drain pipe and the first pipeline is the third connecting part. The first switch valve, the second connecting part, the third connecting part and the first water hole are arranged in sequence.

4. The water level monitoring system according to claim 3, It is characterized in that The second water hole is connected to a circulation pump inlet pipe, and the circulation pump inlet pipe is provided with an inlet switch valve; the circulation pump inlet pipe is in communication with the second pipeline.

5. The water level monitoring system according to claim 3, It is characterized in that The second vent hole is connected to an exhaust pipeline, and the exhaust pipeline is provided with an exhaust switch valve and at least one vacuum pump in sequence, and the exhaust pipeline is in communication with the first pipeline.

6. The water level monitoring system according to claim 5, It is characterized in that The vacuum pumps include two, namely a maintaining vacuum pump and a starting vacuum pump.

7. The water level monitoring system according to claim 6, It is characterized in that The water level gauge is provided with a first start indicator, a low water level alarm mark, a second start indicator and a stop indicator from bottom to top, the first start indicator is used to indicate whether to start the start vacuum pump, the second start indicator is used to indicate whether to start the maintenance vacuum pump, and the stop indicator is used to indicate whether to stop the start vacuum pump and the maintenance vacuum pump; The water level monitoring system further comprises a sensor, and the sensor is used for sensing the first start indicator, the low water level alarm mark, the second start indicator and the shutdown indicator.

8. The water level monitoring system according to claim 7, It is characterized in that The water level gauge is also provided with an extremely low water level alarm mark, and is located below the low water level alarm mark, and the sensor can sense the extremely low water level alarm mark.

9. The water level monitoring system according to claim 8, It is characterized in that The float in the water level gauge is a magnetic float.

10. The water level monitoring system according to claim 9, It is characterized in that It also includes a control unit, which is electrically connected to the starting vacuum pump, the maintaining vacuum pump, the first switch valve, the second switch valve, the third switch valve, the clean water switch valve, the sewage switch valve and the sensor respectively.

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