CN210721152U

CN210721152U - Liquid level controller

Info

Publication number: CN210721152U
Application number: CN201921386361.9U
Authority: CN
Inventors: 孙世林; 孙乐
Original assignee: Anhui Redstar Valve Co Ltd
Current assignee: Anhui Redstar Valve Co Ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-06-09
Anticipated expiration: 2029-08-23

Abstract

The utility model relates to a liquid level control technical field especially relates to a liquid level controller. A liquid level controller comprises a control box, a valve body assembly, a valve core, a sealing assembly and a floating assembly, wherein the valve body assembly is arranged on the control box, the sealing assembly and the valve core are both arranged in the valve body assembly, and the floating assembly is accommodated in the control box; the valve body assembly is provided with a communication hole and an installation cavity, the valve core is provided with a channel, one end of the sealing assembly penetrates through the communication hole and extends into the control box, the sealing assembly is connected with the floating assembly and moves up and down together with the floating assembly, and the other end of the sealing assembly is contained in the installation cavity and is used for being matched with the valve core to open/close the channel. The utility model has the advantages that: through being connected seal assembly with the subassembly that floats to when liquid level controller opened, increase seal assembly's gravity, make seal assembly seal the intercommunicating pore is more reliable.

Description

Liquid level controller

Technical Field

The utility model relates to a liquid level control technical field especially relates to a liquid level controller.

Background

And the liquid level controller is arranged in the liquid storage device and used for controlling the height of the liquid level in the liquid storage device. The liquid level controller can be divided into electronic liquid level switch control, floating ball switch control, siphon control and the like according to different control modes. The liquid level controller mainly controls the opening and closing of the valve so as to realize the height control of the liquid level by supplementing liquid to the liquid storage device.

The liquid level controller mainly comprises a valve body assembly, a sealing element, a control box, a floating assembly and the like, wherein the floating assembly is arranged in the control box, the sealing element is arranged on the valve body assembly and extends into the control box, so that the sealing element is matched with the floating ball assembly, the floating ball assembly is driven by buoyancy to actuate the sealing element, and therefore the opening/closing of the liquid level controller is controlled, and the opening and the closing of the control valve are realized. However, the existing sealing element and the floating ball assembly are arranged independently, and the sealing between the sealing element and the valve body assembly is only based on the self gravity of the sealing element, so that the sealing reliability is poor.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a liquid level controller with reliable operation and sealing.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

a liquid level controller is arranged in a liquid storage device and used for controlling the liquid level of a fluid medium in the liquid storage device, and the liquid level controller comprises a control box, a valve body assembly, a valve core, a sealing assembly and a floating assembly, wherein the valve body assembly is arranged on the control box, the sealing assembly and the valve core are both arranged in the valve body assembly, and the floating assembly is accommodated in the control box;

the valve body assembly is provided with a communication hole and an installation cavity, the valve core is provided with a channel, one end of the sealing assembly penetrates through the communication hole and extends into the control box, the sealing assembly is connected with the floating assembly and moves up and down together with the floating assembly, and the other end of the sealing assembly is contained in the installation cavity and is used for being matched with the valve core to open/close the channel.

It can be understood that, by connecting the sealing component with the floating component, when the liquid level controller is started, the gravity of the sealing component is increased, so that the sealing component can seal the communication hole more reliably, the medium is prevented from flowing into the control box from the communication hole, and the stability and the reliability of the operation of the valve are ensured.

In one embodiment, the sealing component is magnetically attached to the float component.

In one embodiment, one end of the floating assembly, which is close to the valve body assembly, is provided with a magnet, and the magnet is magnetically connected with the sealing assembly;

or a magnet is arranged at one end of the sealing component extending into the control box and is connected with the floating component in a magnetic attraction manner.

In one embodiment, the sealing assembly comprises a first sealing element and a magnetic element, the first sealing element is sleeved on the magnetic element and used for sealing the communication hole, the magnet is embedded in the floating assembly, and one end of the magnetic element, which extends into the control box, is magnetically attracted and connected with the magnet.

In one embodiment, the sealing assembly further comprises a second sealing element, the second sealing element is arranged at one end of the magnetic element far away from the control box, and is matched with the valve core to open/close the channel under the driving of the floating assembly.

In one embodiment, the seal assembly is flexibly connected to the float assembly.

In one embodiment, the sealing assembly comprises a flexible sealing element, one end of the floating assembly, which is close to the valve body assembly, is provided with a mounting hole, and one end of the flexible sealing element extends into the control box and is mounted in the mounting hole; the other end of the flexible sealing element is in sealing fit with the valve core.

In one embodiment, the outer diameter of the end of the flexible sealing element extending into the control box is larger than the diameter of the mounting hole.

In one embodiment, the flexible sealing element is provided with a limiting part, the communication hole is formed in the bottom of the installation cavity, and the limiting part is used for sealing and matching.

In one embodiment, one end of the communication hole, which is close to the installation cavity, is provided with an inclined surface, and the sealing assembly is matched with the inclined surface to seal the communication hole.

Compared with the prior art, the liquid level controller is connected with the floating assembly through the sealing assembly, and moves up and down together along with the floating assembly, so that when the liquid level controller is opened, the gravity of the sealing assembly is increased, the sealing assembly is sealed, the communication hole is more reliable, a medium is prevented from flowing into the control box through the communication hole, and the stability and the reliability of the operation of the valve are ensured.

Drawings

Fig. 1 is a cross-sectional view of an embodiment of a liquid level controller provided by the present invention;

FIG. 2 is an enlarged view of the point A in FIG. 1 according to the present invention;

fig. 3 is a cross-sectional view of another embodiment of the liquid level controller provided by the present invention;

fig. 4 is an enlarged view of the point B in fig. 3 according to the present invention;

fig. 5 is a schematic view of the control tube structure provided by the present invention.

In the drawings, a fluid level control system 100, a valve body assembly 10, a communication hole 11, a slope 111, a mounting cavity 12, a valve body 13, a first inlet 131, a second outlet 132, a chamber 133, a valve cover 14, a valve seat 15, a first outlet 151, a mounting hole 44, an auxiliary air exhaust 16, a valve core 20, a passage 21, a first passage 21a, a second passage 21b, a sealing assembly 30, a first sealing member 31, a magnetic member 32, a limiting portion 321, a second sealing member 33, a flexible sealing member 34, a floating assembly 40, a float 41, a solid structure 42, a magnet 43, a control box 50, a control hole 51, a valve flap 60, a through hole 61, a control pipe 70, a fluid inlet 71, a fluid outlet 72, a first bending portion 73, and a second bending portion 74 are shown.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present invention provides a liquid level controller system (not shown) for controlling the liquid level of a fluid medium in a liquid storage device (not shown) to realize the function of automatically supplying the fluid medium to the liquid storage device. In this embodiment, the liquid storage device may be a water tank, an oil tank, or the like, and the fluid medium may be a liquid such as water, oil, or the like.

The liquid level control system comprises a main valve assembly and a liquid level controller 100, the main valve assembly is connected to the pipeline assembly, and the liquid level controller 100 is arranged in the liquid storage device and connected with the main valve assembly and used for controlling the opening and closing of the main valve assembly. In this embodiment, the main valve assembly is a conventional valve assembly. For example, the main valve assembly may be an axial flow water control valve, a diaphragm water control valve, or the like. Of course, the liquid level controller 100 may also be used alone, that is, the liquid level controller 100 is connected to a pipeline assembly, and the liquid level of the liquid storage device is controlled by the on/off of the liquid level controller 100 itself. Here, it should be explained that the level of the fluid medium in the reservoir means the height of the fluid medium at the position in the reservoir.

Referring to fig. 1, the liquid level controller 100 includes a valve body assembly 10, a valve core 20, a sealing assembly 30, a floating assembly 40 and a control box 50, wherein the valve body assembly 10 is installed on the control box 50, the sealing assembly 30 and the valve core 20 are both installed in the valve body assembly 10, and the floating assembly 40 is accommodated in the control box 50; the valve core 20 is provided with a channel 21, one end of the sealing component 30 is matched with the valve core 20, the other end of the sealing component 30 is matched with the floating component 40, the floating component 40 drives the sealing component 30 to move, and the channel 21 is opened/closed by being matched with the valve core 20, so that the liquid level controller 20 is opened and closed.

The valve body assembly 10 is provided with a communication hole 11 and an installation cavity 12, one end of the sealing assembly 30 penetrates through the communication hole 11 and extends into the control box 50, and is connected with the floating assembly 40, the sealing assembly 30 moves up and down together with the floating assembly 40, and the other end of the sealing assembly 30 is accommodated in the installation cavity 12 and is used for being matched with the valve core 20 to open/close the channel 21.

It can be understood that the sealing assembly 30 is connected with the floating assembly 40, so that when the sealing assembly 30 seals the communication hole 11, the acting force is formed by the gravity of the sealing assembly 30 and the gravity of the floating assembly 40, the sealing effect of the communication hole 11 is effectively improved, and the problems that when the main valve assembly is opened, fluid medium enters the control box 50 from the communication hole 11 in advance, the floating assembly 40 is subjected to buoyancy in advance, the sealing assembly 30 is driven to close the channel 21, and the main valve assembly is closed in advance and the like are solved.

Of course, the liquid level controller 100 includes components such as the valve flap 60 and the control pipe 70 in addition to the components such as the valve body assembly 10, the valve core 20, the floating assembly 40 of the sealing assembly 30, and the control box 50, which are explained above. The valve clack 60 is arranged in the valve body assembly 10, a through hole 61 is formed in the valve clack 60, one end of the valve core 20 is connected into the through hole 61, a gap is formed between the hole wall of the through hole 61 and the outer wall of the valve core 20, and the floating assembly 40 drives the sealing assembly 30 to move so as to enable the valve clack 60 to move, so that the liquid level controller 20 is opened and closed.

Referring to fig. 2, the valve assembly 10 includes a valve body 13, a valve cover 14 and a valve seat 15, the valve body 13 is mounted on the valve seat 15 by a screw connection, a welding connection, and the like, and the valve cover 14 covers the valve body 13. Preferably, in the present embodiment, the valve body 13 and the valve seat 15 are connected by a screw thread, i.e. a screw connection.

The valve body 13 is provided with a first inlet 131 for allowing a fluid medium to enter and a second outlet 132 for allowing the fluid medium to flow out, the valve flap 60 is disposed in the valve body 13, a chamber 133 is defined by the valve flap 60, the valve body 13 and the valve seat 15, the first inlet 131 is used for being connected with an external pipeline assembly to guide the fluid medium to enter the valve body 13, and the second outlet 132 is communicated with the liquid storage device to enable the fluid medium flowing out of the second outlet 132 to flow into the liquid storage device. In this embodiment, the valve flap 60 is controlled to move so as to control the communication or the separation between the first inlet 131 and the second outlet 132, so as to open and close the liquid level controller 100.

The communicating hole 11 and the mounting cavity 12 are arranged on the valve seat 15, a first outlet 151 for flowing out a fluid medium is further arranged on the valve seat 15, the chamber 133 is located between the first outlet 151 and the second outlet 132, one end of the first outlet 151 is communicated with the liquid storage device, and the other end of the first outlet 151 is communicated with the mounting cavity 12.

The channel 21 is communicated with the chamber 133, and fluid medium of the chamber 133 flows out.

Specifically, the passage 21 includes a first passage 21a and a second passage 21b, the first passage 21a communicates with the chamber 133, and one end of the second passage 21b communicates with the first passage 21a, and the other end is used for cooperating with the sealing assembly 30. Preferably, the axis of the first channel 21a is perpendicular to the axis of the second channel 21b, however, in other embodiments, the axis of the first channel 21a and the axis of the second channel 21b may not be perpendicular.

The floating assembly 40 comprises a float 41 and a solid structure 42, wherein the solid structure 42 fills the inside of the float 41, and the density of the solid structure 42 is smaller than that of the fluid medium, so that the float 41 can float on the liquid level under the action of the fluid medium. Here, the solid structure 42 is filled in the float 41, so that situations that the fluid medium of the fluid storage device overflows and the like due to insufficient buoyancy or lost buoyancy caused by the fact that the fluid medium enters the float 41 and the float 41 is broken or falls off and the fluid medium cannot be controlled are avoided.

Of course, in other embodiments, the solid structure 42 may instead be a hollow structure.

Further, the float 41 is substantially cylindrical, the float 41 is disposed in the control box 50, and one end of the float 41 is engaged with the sealing assembly 30. When the float 41 is floated by force, the float 41 pushes the sealing assembly 30 to seal the channel 21 under the action of buoyancy, so that the valve flap 60 moves to close the liquid level controller 100; when the float 41 is dropped, the sealing assembly 30 is separated from the passage 21 and the communication hole 11 is sealed, the chamber 133 is communicated with the first outlet 151 through the passage 21, and the valve flap 60 is moved to open the liquid level controller 100.

In one embodiment, as shown in FIG. 2, the sealing member 30 is magnetically attached to the float member 40.

Specifically, in one embodiment, a magnet 43 is disposed at an end of the floating assembly 40 close to the valve body assembly 10, and the magnet 43 is magnetically connected to the sealing assembly 30; of course, in another embodiment, a magnet 43 may be disposed at an end of the sealing assembly 30 extending into the control box, and the magnet 43 is magnetically connected to the floating assembly 40.

In this embodiment, the magnet 43 is disposed on the floating assembly 40, and the magnetic attraction connection between the sealing assembly 30 and the floating assembly 40 is specifically described by taking the magnet 43 on the floating assembly 40 as an object of the description.

The sealing assembly 30 includes a first sealing member 31 and a magnetic member 32, wherein the first sealing member 31 is sleeved on the magnetic member 32 for sealing the communication hole 11. The magnet 43 is embedded in the floating assembly 40, and one end of the magnetic member 32 extending into the control box 50 is magnetically connected with the magnet 43.

The magnetic member 32 is made of a magnetic material, an installation groove (not labeled) is formed in an outer wall of the magnetic member 32, the first sealing member 31 is installed in the installation groove and is in sealing connection with a hole wall of the communication hole 11, so that a medium in the installation cavity 12 is prevented from flowing into the control box 50 from a gap between the magnetic member 32 and the hole wall of the communication hole 11.

The communication hole 11 is located at the bottom of the installation cavity 12, an inclined plane 111 is arranged at one end, close to the installation cavity 12, of the communication hole 11, and the inclined plane 111 is matched with the first sealing element 31, so that the sealing effect of the first sealing element 31 is improved.

Further, the aperture of the communicating hole 11 is smaller than the inner diameter of the installation cavity 12, that is, a step is formed at the bottom of the installation cavity 12, a limiting portion 321 is arranged on the magnetic member 32, and the limiting portion 321 is used for matching with the step to limit the magnetic member 32 to be separated from the communicating hole 11, so that sealing failure between the magnetic member 32 and the communicating hole 11 is avoided, and the stability and reliability of the operation of the valve are further improved. Meanwhile, the limiting part 321 is connected with the step in a sealing manner to form double-layer sealing, so that the sealing effect of the communication hole 11 is improved.

The sealing assembly 30 further includes a second sealing member 33, and the second sealing member 33 is disposed at an end of the magnetic member 32 away from the control box 50 and is driven by the floating assembly 40 to cooperate with the valve core 20 to open/close the passage 21.

Preferably, in this embodiment, the first sealing member 31 and the second sealing member 33 are rubber members or silicone members.

In another embodiment, as shown in fig. 3 and 4, the sealing assembly 30 is flexibly connected to the floating assembly 40.

The sealing assembly 30 comprises a flexible sealing element 34, a mounting hole 44 is formed at one end of the floating assembly 40 close to the valve body assembly 10, one end of the flexible sealing assembly 30 extends into the control box 50 and is mounted in the mounting hole 44, and therefore flexible connection between the sealing assembly 30 and the floating assembly 40 is achieved.

Further, the flexible seal 34 may be a rubber or silicone member. It can be understood that the flexible sealing element 34 itself has a sealing function, and is disposed through the communication hole 11 and can cooperate with the hole wall of the communication hole 11 to seal the communication hole 11, so as to prevent the medium in the installation cavity 12 from flowing into the control box 50 from the gap between the flexible sealing element 34 and the hole wall of the communication hole 11.

Preferably, the outer diameter of the end of the flexible seal 34 extending into the control box 50 is larger than the diameter of the mounting hole 44, so as to prevent the flexible seal 34 from falling off the floating assembly 40.

The flexible sealing element 34 is provided with a limiting part 321, the communication hole 11 is formed in the bottom of the installation cavity 12, and the limiting part 321 is used for being matched with the bottom of the installation cavity 321 to limit the flexible sealing element 34 to be separated from the communication hole 11, so that sealing failure between the flexible sealing element 34 and the communication hole 11 is avoided, and stability and reliability of valve operation are further improved.

Of course, it is not exhaustive that the sealing assembly 30 and the floating assembly 40 may be connected in other ways than the two embodiments described above, such as by screwing, gluing, and snap-fitting, for example.

The control box 50 is substantially cylindrical, the control box 50 has two opposite ends, a first end of the control box 50 is mounted on the valve seat 15 through a detachable structure, a second end of the control box is disposed near the bottom of the liquid storage device, and the control tube 70 is connected to the second end of the control box 50. Here, the detachable structure includes a bolt structure, a snap structure, and the like. In this embodiment, the control box 50 is mounted on the valve seat 15 by a bolt structure.

Further, a control hole 51 for allowing the fluid medium in the reservoir to flow into the control box 50 is formed in one end of the control box 50 close to the valve seat 15, and when the fluid medium level in the reservoir rises to the control hole 51, the fluid medium flows into the control box 50, so that the float 41 floats under the action of the buoyancy force to push the sealing assembly 30 to seal the passage 21, so that the liquid level controller 20 is closed, and the main valve assembly 10 is closed to stop filling the liquid into the reservoir.

The valve body assembly 10 is further provided with an auxiliary exhaust member 16, the auxiliary exhaust member 16 is communicated with the inside of the control box 50, and the auxiliary exhaust member 16 is used for guiding the gas in the control box 50 to be exhausted in the process that the fluid medium flows into the control box 50.

It can be understood that, by providing the auxiliary exhaust member 16, even when the liquid level of the fluid medium in the liquid storage device rises too fast to submerge the control hole 51, the gas in the control box 50 can be smoothly exhausted out of the control box 50, so that the fluid medium can smoothly enter the control box from the control hole 51, and further, under the action of the fluid medium, the floating assembly 40 can normally respond and control the sealing assembly 30 to seal the channel 21, so that the liquid level controller is normally closed, the control effect of the liquid level controller is improved, and the fluid medium in the liquid storage device is prevented from overflowing.

As shown in fig. 5, the control tube 70 is a circular tube or a special-shaped tube, the control tube 70 has a highest point G and a lowest point L which are oppositely arranged, the highest point G of the control tube 70 is arranged close to the control hole 51, the lowest point L of the control tube 70 is arranged far from the control hole 51, one end of the control tube 70 is communicated with the inside of the control box 50, and the other end of the control tube extends into a predetermined position in the liquid storage device.

Here, it should be explained that the predetermined position in the reservoir means is the position of the predetermined minimum liquid level in the reservoir means. In this position, float 41 is lowered, chamber 133 is in communication with first inlet 131 through passage 21, and valve flap 60 is moved to open valve 100, thereby controlling the opening of main valve assembly 10 to replenish the fluid medium in the reservoir.

The highest point G of the control tube 70 may be higher than the position of the control hole 51 or lower than the position of the control hole 51. In the present embodiment, the highest point G of the control tube 70 is higher than the position of the control hole 51.

When the liquid level in the liquid storage device rises to a certain height, the fluid medium enters the control box 50 from the highest point G of the control pipe 70 or the control hole 51, at this time, a section of air is sealed in the control pipe 70, and at the same time, the float 41 is driven by the buoyancy force to seal the channel 21 by the sealing assembly 30, so that the valve flap 60 moves, and the liquid level controller 100 is closed; when the liquid level in the liquid storage device drops to a predetermined position, the volume in the control tube 70 increases, so that the air pressure of the air in the control tube 70 decreases, and a siphon phenomenon occurs, so that the fluid medium in the control box 50 flows into the liquid storage device through the control tube 70, the buoyancy applied to the float 41 disappears, and the sealing assembly 30 is separated from the passage 21, so that the valve flap 60 moves, and the liquid level controller 100 opens.

In this embodiment, the control tube 70 is provided to precisely control the high and low liquid levels of the liquid storage device, so as to avoid frequent opening/closing of the liquid level controller 100 and the main valve assembly, prolong the service life of the liquid level controller 100 and the main valve assembly by at least 10 times, and adjust and control the low liquid level of the liquid storage device according to different heights of the liquid storage device; secondly, avoided the open/close of liquid level controller 100 and main valve subassembly frequent to the fluctuation of the medium pressure of fluid medium in the pipeline has been reduced, and not only the noise is reduced, and the fluid medium in the stock solution device always is in high liquid level, easily forms the stagnant water district in the bottom of stock solution device, causes the secondary pollution of fluid medium in the stock solution device, sets up very rationally.

Here, the siphon phenomenon is a force phenomenon using a difference in liquid level so that the fluid medium in the control tank 50 flows into the liquid storage device through the control pipe 70.

In this embodiment, since the area of the control tube 70 through which the fluid medium flows is constant, the amount of air that can be sealed in the control tube 70 can be changed by changing the position of the highest point G of the control tube 70, and the air pressure in the control tube 70 is changed, so that the height of the liquid level in the liquid storage device is adjusted by changing the height of the siphon generated by the control tube 70.

Referring to fig. 5, one end of the control tube 70 is a liquid inlet 71, the other end is a liquid outlet 72, the liquid inlet 71 extends into the liquid storage device and is close to the bottom of the liquid storage device, the liquid outlet 72 is communicated with the control box 50, and a fluid medium of the liquid storage device enters the control box 50 through the liquid inlet 71.

Further, the control tube 70 may be a round tube or other special-shaped tube, and the control tube 70 includes a first bending portion 73 and a second bending portion 74, and a bending direction of the first bending portion 73 is opposite to a bending direction of the second bending portion 74. Specifically, the first curved portion 73 is substantially "U" shaped, and the second curved portion 74 is also substantially "U", and the "U" shaped opening of the first curved portion 73 faces opposite to the "U" opening of the second curved portion 74.

Preferably, the bending direction of the first bending portion 73 faces the bottom of the liquid storage device, the bending direction of the second bending portion 74 faces away from the bottom of the liquid storage device, the position of the bending portion of the first bending portion 73 is a highest point G, the position of the bending portion of the second bending portion 74 is a lowest point L, and the highest point G is higher than the liquid outlet 72.

It can be understood that when the fluid medium in the control box 50 rises to the outlet 72 of the control tube 70, i.e. the fluid medium enters from the inlet 71 and rises to the height of the outlet 72, the fluid medium enters into the control tube 70 through the outlet 72, and at this time, a section of air is sealed in the control tube 70 due to the height difference between the highest point G and the outlet 72; when the liquid level of the fluid medium in the liquid storage device decreases, the air sealed in the control tube 70 is slowly drawn to be thin (the liquid level in the control tube also decreases, and the space increases), so that a siphon phenomenon is generated, and the fluid medium in the control box 50 flows into the liquid storage device through the control tube 70, and then the buoy 41 falls.

The working principle of the liquid level controller 100 is explained below:

(1) initial state: the main valve assembly is in a closed position; the float 41 is dropped into the control box 50 by its own weight, the sealing member 30 seals the communication hole 11, the chamber 133 is communicated with the first outlet 151 through the passage 21, and the liquid level controller 100 is in an open state.

(2) The opening process of the main valve component: the fluid medium flows through the pipeline to the liquid level controller 100 when entering for the first time, and the liquid level controller 100 is in an open state due to the initial state, so that the fluid medium enters from the first inlet 131 and flows out from the second outlet 132 to the liquid storage device; meanwhile, part of the fluid medium flows out of the liquid storage device through the through hole 61, the cavity 133, the channel 21 and the first outlet 151; at this time, the main valve assembly is opened under the pressure of the fluid medium itself, and the fluid medium flows into the liquid storage device through the main valve assembly.

(3) Main valve assembly 10 closing process: when the liquid level in the liquid storage device rises to the highest liquid level, the fluid medium in the liquid storage device enters the control box 50 through the control hole 51 or the control pipe 70 on the control box 50; at this time, the float 41 is under the buoyancy of the fluid medium to drive the sealing assembly 30 to seal the channel 21, the pressure in the chamber 133 increases continuously as the chamber 133 is continuously filled with the fluid medium, and when the pressure of the fluid medium in the chamber 133 reaches a certain value, the pressure of the fluid medium in the chamber 133 pushes the valve flap 60 to move so as to close the liquid level controller 100;

when the level controller 100 is closed, the main valve assembly is closed accordingly.

(4) The liquid level control process of the liquid storage device is as follows: when the liquid level in the liquid storage device reaches the highest point, the liquid level controller 100 is closed, so that the main valve assembly is also closed, which is described in detail in the closing process of the main valve assembly and is not described again;

when the liquid level in the liquid storage device reaches the lowest point, firstly, as the liquid level in the liquid storage device descends, when the liquid level descends to a preset position, a siphon phenomenon is generated between the control box 50 and the liquid storage device, the fluid medium in the control box 50 is sucked into the liquid storage device through the control pipe 70, so that the buoyancy force borne by the buoy 41 disappears, the buoy 41 falls, the sealing assembly 30 is separated from the channel 21, and the sealing assembly 30 seals the communication hole 11 under the gravity action of the buoy 41 and the sealing assembly 30; meanwhile, the chamber 133 is communicated with the first outlet 151 through the passage 21, so that the fluid medium pressure of the chamber 133 is discharged through the first outlet 151, and the valve flap 60 moves under the action of the fluid medium pressure of the first inlet 131, so that the liquid level controller 100 is opened, and further, the main valve assembly is opened to enter a circulation process, so that the liquid level controller 100 controls the opening and closing of the main valve assembly, and the control of the fluid medium liquid level in the liquid storage device is achieved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A liquid level controller comprises a control box, a valve body assembly, a valve core, a sealing assembly and a floating assembly, wherein the valve body assembly is arranged on the control box, the sealing assembly and the valve core are both arranged in the valve body assembly, and the floating assembly is accommodated in the control box;

the valve body assembly is characterized in that a communicating hole and an installation cavity are formed in the valve body assembly, a channel is formed in the valve core, one end of the sealing assembly penetrates through the communicating hole and extends into the control box, the sealing assembly is connected with the floating assembly and moves up and down together with the floating assembly, and the other end of the sealing assembly is contained in the installation cavity and is used for being matched with the valve core to open/close the channel.

2. The liquid level controller of claim 1, wherein the sealing assembly is magnetically coupled to the float assembly.

3. The liquid level controller of claim 2, wherein a magnet is disposed at an end of the floating assembly near the valve body assembly, and the magnet is magnetically connected with the sealing assembly;

4. The liquid level controller according to claim 3, wherein the sealing assembly comprises a first sealing member and a magnetic member, the first sealing member is sleeved on the magnetic member for sealing the communication hole, the magnet is embedded in the floating assembly, and one end of the magnetic member extending into the control box is magnetically attracted to the magnet.

5. The liquid level controller according to claim 4, wherein the sealing assembly further comprises a second sealing member, the second sealing member is disposed at an end of the magnetic member away from the control box and is engaged with the valve core to open/close the passage under the driving of the floating assembly.

6. The liquid level controller of claim 1, wherein the seal assembly is flexibly connected to the float assembly.

7. The liquid level controller of claim 6, wherein the sealing assembly comprises a flexible sealing element, one end of the floating assembly near the valve body assembly is provided with a mounting hole, and one end of the flexible sealing element extends into the control box and is mounted in the mounting hole; the other end of the flexible sealing element is in sealing fit with the valve core.

8. The liquid level controller of claim 7, wherein an outer diameter of an end of the flexible seal that extends into the control box is larger than an aperture of the mounting hole.

9. The liquid level controller according to claim 8, wherein the flexible sealing member is provided with a limiting portion for sealing engagement with the communication hole.

10. The liquid level controller according to claim 1, wherein an end of the communication hole near the installation cavity is provided with an inclined surface, and the sealing assembly is matched with the inclined surface to seal the communication hole.