Water tank with liquid level control function

Abstract

The utility model discloses a water tank with a liquid level control function, which comprises a tank body, a water inlet is arranged on the tank body, a water inlet pipe is arranged at the water inlet, a water inlet electromagnetic valve is arranged on the water inlet pipe, a water outlet pipe is further arranged on the tank body, a water outlet electromagnetic valve is arranged on the water outlet pipe, an overflow port is arranged on the upper portion of the tank body, and the overflow port is arranged on the lower portion of the tank body. The device is characterized in that a sensor support is arranged at the upper end of the box body, an upper limit liquid level sensor and a lower limit liquid level sensor are arranged on the sensor support at intervals from top to bottom, a guide seat is arranged on the box body on one side of the sensor support, a sliding rod is arranged in the guide seat, a floating ball is arranged at the lower end of the sliding rod, and a liquid level sensor is arranged at the lower end of the floating ball. The floating ball is arranged in the box body, and an inductive probe matched with the upper limit liquid level sensor and the lower limit liquid level sensor is arranged on the sliding rod above the guide seat. The device is simple in structure, capable of effectively preventing excessive water inflow and effectively preventing the influence of the water quality problem on the sensor, and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of water tanks, in particular to a water tank with liquid level control. Background Art

[0002] Similar methods of water ring pump water tank level control on the market now include:

[0003] 1. Use a duckbill liquid level switch to control the liquid level. When the liquid level is lower than the switch installation position, the liquid level signal is disconnected under the action of gravity, and water is added; when the liquid level is higher than the switch installation position, the liquid level signal is connected under the action of buoyancy, and water addition is stopped. Disadvantages: During operation, scale, particulate impurities, rust and other substances will appear in the water, which will cause great resistance to the rotating part of the duckbill liquid level switch and make it impossible to connect and disconnect. As a result, no matter where the water level is, the switch only presents one state (connected or disconnected), and the water level cannot be effectively controlled. At the same time, because the duckbill liquid level switch is threadedly installed on the water tank, it is necessary to stop the machine to replace the liquid level switch, and the function of maintenance without stopping the machine cannot be realized. This solution requires the equipment manufacturer to replace it on site, which increases the maintenance cost.

[0004] Second, use capacitive control of the liquid level. When the liquid level is lower than the switch installation position, the induction probe cannot sense water, the liquid level signal is disconnected, and water is added; when the liquid level is higher than the switch installation position, the induction probe senses water and stops adding water; Disadvantages: Impurities appear in the water quality, the sensor detection will be affected, and the sensitivity of the sensor needs to be readjusted; if the water quality problem is further aggravated, adjusting the sensitivity of the sensor cannot achieve normal detection function. This solution requires regular personnel to adjust the sensitivity of the sensor, which is time-consuming and labor-intensive, and cannot achieve efficient and stable liquid level control. At the same time, both of the above solutions only install one liquid level switch. When the water tank temperature is too high, the control system will continue to take in water. When the water level exceeds the overflow port, the water will be discharged from the overflow port; if the overflow port is blocked or the drainage is not smooth, the water level will continue to rise, causing water to flow out of the exhaust port, and there may be water accumulation in the machine room.

[0005] Therefore, existing water tank needs to be further improved. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies in the prior art and to provide a water tank with a simple structure, which can effectively prevent excessive water inflow and the influence of water quality problems on sensors and is easy to maintain.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following scheme: a water tank with liquid level control, comprising a box body, a water inlet is provided on the box body, a water inlet pipe is provided on the water inlet, a water inlet solenoid valve is provided on the water inlet pipe, a water outlet pipe is also provided on the box body, a water outlet solenoid valve is provided on the water outlet pipe, and an overflow port is provided on the upper part of the box body, characterized in that: a sensor bracket is provided at the upper end of the box body, at least one group of upper limit liquid level sensor and lower limit liquid level sensor are arranged on the sensor bracket from top to bottom, a guide seat is provided on the box body on one side of the sensor bracket, a sliding rod is provided in the guide seat, a floating ball is provided at the lower end of the sliding rod, the floating ball is arranged in the box body, and an induction probe matching the upper limit liquid level sensor and the lower limit liquid level sensor is provided on the sliding rod above the guide seat.

[0008] As another improvement of the water tank with liquid level control of the utility model, a liquid level gauge is provided on the outer wall of the box body, the lower end of the liquid level gauge is connected to the middle of the box body, and the upper end of the liquid level gauge is connected to the box body above the overflow port.

[0009] As another improvement of the water tank with liquid level control of the utility model, the sensing probe is fixedly connected to the sliding rod by screws.

[0010] As another improvement of the water tank with liquid level control of the utility model, a sewage pipe is provided at the bottom of the tank body, and a first manual control switch is provided on the sewage pipe.

[0011] As another improvement of the water tank with liquid level control of the utility model, a plurality of adjustment holes are evenly arranged from top to bottom on the sensor bracket, and the upper limit liquid level sensor is arranged in one of the adjustment holes.

[0012] As another improvement of the water tank with liquid level control of the utility model, a second manual control switch is provided on one side of the water inlet end of the water inlet solenoid valve.

[0013] As another improvement of the water tank with liquid level control of the utility model, a rotating seat is provided at the bottom of the box body, a rotating shaft is arranged in the rotating seat through a bearing, an impeller is provided at the upper end of the rotating shaft at a position corresponding to the water inlet, and a scraper that can rotate synchronously with the rotating shaft is provided at the lower part of the rotating shaft, and the angle between the water inlet and the impeller is an acute angle.

[0014] As another improvement of the water tank with liquid level control of the utility model, the number of groups of the upper limit liquid level sensor and the lower limit liquid level sensor is one group, two groups, three groups or four groups.

[0015] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0016] 1. Sensors, probes and other components are all outside the water tank. There is no need to shut down and open the water tank for maintenance, which reduces the intensity of after-sales work while ensuring uninterrupted operation of the equipment. At the same time, these external components are not affected by changes in water quality, thereby improving the stability of the system.

[0017] 2. During debugging, adjust the installation position of the induction contact and the position of the upper and lower limit sensors according to the water level observation port on the side of the water tank. The operation is simple.

[0018] 3. The upper and lower limit sensor design reduces the risk of water level loss of control when a single liquid level sensor fails, preventing problems caused by excessive water inflow.

[0019] 4. The design of the slide rod float and guide seat structure reduces the risk of mechanical failure of the duckbill sensor caused by rust and other substances in the water, and also avoids the problem of the accuracy of the capacitive sensor being affected by stolen goods, thereby improving the stability of the liquid level control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the utility model when the water tank has the maximum water level.

[0021] Figure 2 This is a schematic diagram of the utility model when the water tank is at a low water level.

[0022] Figure 3 It is a schematic diagram of the utility model during cleaning.

[0023] In the figure: 1. box body; 2. water inlet; 3. water inlet pipe; 4. water inlet solenoid valve; 5. overflow port; 6. sensor bracket; 7. upper limit liquid level sensor; 8. lower limit liquid level sensor; 9. guide seat; 10. slide rod; 11. float; 12. induction probe; 13. liquid level gauge; 14. screw; 15. drain pipe; 16. first manual control switch; 17. second manual control switch; 18. rotating seat; 19. rotating shaft; 20. impeller; 21. scraper.

[0024] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0025] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0026] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] like Figure 1-3 As shown, a water tank with liquid level control includes a box body 1, a water inlet 2 is provided on the box body 1, a water inlet pipe 3 is provided on the water inlet 2, a water inlet solenoid valve 4 is provided on the water inlet pipe 3, a water outlet pipe is also provided on the box body 1, a water outlet solenoid valve is provided on the water outlet pipe, an overflow port 5 is provided on the upper part of the box body 1, a sensor bracket 6 is provided on the upper end of the box body 1, an upper limit liquid level sensor 7 and a lower limit liquid level sensor 8 are arranged on the sensor bracket 6 from top to bottom, a guide seat 9 is provided on the box body 1 on one side of the sensor bracket 6, a slide rod 10 is provided in the guide seat 9, a float 11 is provided at the lower end of the slide rod 10, and the float 11 is arranged in the box body 1, and a sensing probe 12 matching the upper limit liquid level sensor 7 and the lower limit liquid level sensor 8 is provided on the slide rod 10 above the guide seat 9.

[0029] The utility model adopts two external non-contact liquid level sensors, which are divided into a lower limit liquid level sensor and an upper limit liquid level sensor. When working normally, only the lower limit liquid level sensor needs to work to control the switch of the water inlet solenoid valve to achieve the purpose of controlling the water level. When the lower limit liquid level sensor fails or other reasons cause the water tank to continue to inflate, as the water level rises, when the upper limit liquid level sensor detects a signal, the water inlet solenoid valve is controlled to close to prevent problems caused by excessive water inflow.

[0030] In the utility model, the sensor and the induction probe are both arranged outside the water tank, which can effectively prevent the influence of water quality problems on the sensor; and it is also convenient for after-sales maintenance.

[0031] The utility model provides a liquid level gauge 13 on the outer wall of the box body 1 , the lower end of the liquid level gauge 13 is connected to the middle of the box body 1 , and the upper end of the liquid level gauge 13 is connected to the box body 1 above the overflow port 5 .

[0032] The sensing probe 12 in the present invention is fixedly connected to the slide bar 10 by means of a screw 14. The position of the sensing probe 12 on the slide bar 10 can be adjusted by adjusting the screw 14, thereby adjusting the water level in the water tank.

[0033] In the utility model, a sewage pipe 15 is provided at the bottom of the box body 1 , and a first manual control switch 16 is provided on the sewage pipe 15 .

[0034] In the present invention, a plurality of adjustment holes are evenly arranged from top to bottom on the sensor bracket 6, and the upper limit liquid level sensor 7 is arranged in one of the adjustment holes. The water inflow can be adjusted by changing the upper limit liquid level sensor 7 in different adjustment holes.

[0035] In the utility model, a second manual control switch 17 is provided on one side of the water inlet end of the water inlet solenoid valve 4 .

[0036] The number of groups of the upper limit liquid level sensor 7 and the lower limit liquid level sensor 8 in the utility model is one group, two groups, three groups or four groups. The accuracy of sensing can be improved by increasing the number of the upper limit liquid level sensor 7 and the lower limit liquid level sensor 8.

[0037] Reference Figure 3 In the utility model, a rotating seat 18 is provided at the bottom of the box body 1, a rotating shaft 19 is provided in the rotating seat 18 through a bearing, an impeller 20 is provided at the upper end of the rotating shaft 19 at a position corresponding to the water inlet 2, and a scraper 21 that can rotate synchronously with the rotating shaft 19 is provided at the lower part of the rotating shaft 19, and the angle between the water inlet 2 and the impeller 20 is an acute angle. In the utility model, when the water tank needs to be cleaned, the water in the water tank is first drained, and part of the dirt in the water tank will be discharged through the sewage pipe 15, and then the second manual control switch 17 and the water inlet solenoid valve 4 are controlled to open, and the incoming water impacts the impeller 20 at an angle, and the impeller 20 drives the rotating shaft 19 and the scraper 21 to rotate, so that the dirt at the bottom of the water tank can be cleaned.

[0038] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A water tank with liquid level control, comprising a tank body (1), a water inlet (2) provided on the tank body (1), a water inlet pipe (3) provided on the water inlet (2), a water inlet solenoid valve (4) provided on the water inlet pipe (3), a water outlet pipe provided on the tank body (1), a water outlet solenoid valve provided on the water outlet pipe, and an overflow port (5) provided on the upper part of the tank body (1), characterized in that: A sensor bracket (6) is provided at the upper end of the box body (1), and at least one group of upper limit liquid level sensors (7) and lower limit liquid level sensors (8) are arranged at intervals from top to bottom on the sensor bracket (6). A guide seat (9) is provided on the box body (1) on one side of the sensor bracket (6), a slide bar (10) is provided in the guide seat (9), a floating ball (11) is provided at the lower end of the slide bar (10), and the floating ball (11) is arranged in the box body (1). A sensing probe (12) that matches the upper limit liquid level sensor (7) and the lower limit liquid level sensor (8) is provided on the slide bar (10) above the guide seat (9).

2. A water tank with liquid level control according to claim 1, characterized in that: A liquid level gauge (13) is provided on the outer wall of the box body (1), the lower end of the liquid level gauge (13) is connected to the middle part of the box body (1), and the upper end of the liquid level gauge (13) is connected to the box body (1) above the overflow port (5).

3. A water tank with liquid level control according to claim 1, characterized in that: The sensing probe (12) is fixedly connected to the sliding rod (10) via a screw (14).

4. A water tank with liquid level control according to claim 1, characterized in that: A sewage discharge pipe (15) is provided at the bottom of the box body (1), and a first manual control switch (16) is provided on the sewage discharge pipe (15).

5. A water tank with liquid level control according to claim 2, characterized in that: A plurality of adjustment holes are evenly arranged from top to bottom on the sensor bracket (6), and the upper limit liquid level sensor (7) is arranged in one of the adjustment holes.

6. A water tank with liquid level control according to claim 1, characterized in that: A second manual control switch (17) is provided on one side of the water inlet end of the water inlet solenoid valve (4).

7. A water tank with liquid level control according to claim 3, characterized in that: A rotating seat (18) is provided at the bottom of the housing (1), a rotating shaft (19) is provided in the rotating seat (18) via a bearing, an impeller (20) is provided at the upper end of the rotating shaft (19) at a position corresponding to the water inlet (2), and a scraper (21) capable of rotating synchronously with the rotating shaft (19) is provided at the lower part of the rotating shaft (19), and the angle between the water inlet (2) and the impeller (20) is an acute angle.

8. The water tank with liquid level control according to claim 1, characterized in that: The number of groups of the upper limit liquid level sensors (7) and the lower limit liquid level sensors (8) is one group, two groups, three groups or four groups.

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