Liquid level control delay controller

Abstract

The utility model relates to a liquid level control time-delay controller which comprises an upper shell and a lower shell which are connected in a sealing mode, the upper shell and the lower shell are not communicated with each other, the upper shell is provided with a vacuum channel, an air channel and a switching mechanism, the vacuum channel is communicated with external vacuum, and the air channel is communicated with external air. A trigger mechanism is arranged in the lower shell, a linkage assembly is arranged between the trigger mechanism and the switch mechanism, the lower shell is communicated with a vacuum well, the liquid level in the vacuum well floats up and down to drive the trigger mechanism to move back and forth in the lower shell, and the trigger mechanism can act in linkage with the switch mechanism to do corresponding movement. The switching mechanism opens or closes the air channel at the first position and opens or closes the vacuum channel at the second position. The controller is directly communicated with the liquid level, and on-off control of the controller is achieved through liquid level floating.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum negative pressure controllers, in particular to a liquid level control delay controller. Background Art

[0002] The vacuum sewage well is the main device of the vacuum sewage collection and treatment system, mainly used for temporarily collecting sewage. When the liquid level in the well reaches a certain height, the vacuum valve is opened to pump the water into the main pipeline and transported to the pumping station for centralized treatment. Generally, a drainage pipeline, a vacuum valve, a controller, a liquid level detector, etc. are installed in the vacuum well. Once the liquid level detector detects that the liquid level in the vacuum well is higher than the set value, the controller starts and controls the opening of the vacuum valve to pump water. When the liquid level detector detects that the liquid level in the vacuum well is lower than the set value, the controller controls the closing of the vacuum valve to stop pumping water; the opening and closing of the controller are both affected by the liquid level detector. Therefore, for the vacuum sewage valve control system in the vacuum well, it is necessary to design a controller that can be applied to the vacuum well pumping system and can be opened when the liquid level rises and closed when the liquid level drops without relying on the liquid level detector. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a liquid level control delay controller that is directly connected to the liquid level and realizes the on-off control of the controller through the floating of the liquid level.

[0004] The technical solution adopted by the utility model to solve its technical problem is: a liquid level control delay controller, including an upper shell and a lower shell that are hermetically connected. The upper shell and the lower shell are not communicated with each other. The upper shell is provided with a vacuum channel, an air channel, and a switching mechanism. The vacuum channel is communicated with the external vacuum, and the air channel is communicated with the external air; a triggering mechanism is arranged in the lower shell, and there is a linkage component between the triggering mechanism and the switching mechanism. The lower shell is communicated with the vacuum well, and the up and down floating of the liquid level in the vacuum well can drive the triggering mechanism to move back and forth in the lower shell. The action of the triggering mechanism can drive the switching mechanism to make corresponding movements, so that the switching mechanism opens or closes the air channel at the first position and opens or closes the vacuum channel at the second position.

[0005] Further, the triggering mechanism includes a rubber diaphragm, a magnet, and a triggering spring. The rubber diaphragm is arranged in the lower shell and divides the inner cavity of the lower shell into a first air chamber and a second air chamber. The first air chamber and the second air chamber are not communicated with each other. The first air chamber is communicated with the vacuum well. The magnet is arranged in the second air chamber through a magnet seat, and the magnet seat is fixedly connected to the rubber diaphragm. The triggering spring is sleeved on the middle part and the outer circumference of the magnet seat, and the magnet seat is extruded against the triggering spring when it moves upward.

[0006] Furthermore, the air channel includes a first channel and a second channel, the second channel is sealed and connected to the first channel, the air inlet of the second channel extends into the first channel, the first channel is connected to the outside air, when the first channel and the second channel are connected, the outside air enters the first channel and flows into the inner cavity of the upper shell through the second channel, when the air inlet of the second channel is blocked, the first channel and the second channel are not connected.

[0007] Furthermore, the switch mechanism includes an ejector assembly, a first plug assembly and a second plug assembly, wherein the first plug assembly is arranged in the first channel, the second plug assembly is arranged in the vacuum channel, and the ejector assembly is arranged in the second channel;

[0008] The ejector pin assembly is used to drive the first plug assembly to open or close the air passage when in the first position, and to link the second plug assembly to close or open the vacuum passage when in the second position.

[0009] Further, the ejector assembly includes an ejector, a base plate and an ejector spring, the ejector is fixedly connected to the base plate, the base plate is mounted on a linkage seat, the ejector spring is arranged between the base plate and the lower shell, the lower end of the linkage seat is located in the second channel, and the upper end is located outside the second channel, and the ejector spring is squeezed when the ejector assembly moves downward;

[0010] When the ejector assembly moves, the linkage seat moves synchronously with the ejector assembly.

[0011] Furthermore, the first plug assembly includes a first plug, a first spring and a first spring seat, the first spring is installed in the first channel through the first spring seat, and the first plug is fixedly connected to the first spring seat; in normal state, the first plug is located at the air inlet of the second channel.

[0012] Furthermore, the second plug assembly includes a second plug, a second spring and a limit piece, the upper end of the linkage seat has a second mounting portion, the limit piece passes through the second mounting portion and the second spring in sequence from the bottom of the second mounting portion and is fixedly connected to the second plug, the second spring is located between the second plug and the second mounting portion, and the second mounting portion squeezes the second spring when it moves upward.

[0013] Furthermore, the specific structure of the magnet installed on the magnet seat is: there are two magnets, a first mounting part is provided on the magnet seat, and the two magnets are respectively installed on the upper and lower sides of the first mounting part, and the magnetic attraction between the magnets of different poles firmly adsorbs the two magnets on the upper and lower sides of the first mounting part.

[0014] Furthermore, the second air chamber is provided with a first air port connected to the outside, and the first air port is provided with a check valve.

[0015] Furthermore, the second air chamber is provided with a second air port communicating with the outside, and a throttle valve is provided at the second air port.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. The controller of the present utility model is directly connected to the liquid level, and the on-off control of the controller is realized through the floating of the liquid level. The whole process is mechanized and driven without electric power, and the use setting area is not limited.

[0018] 2. By designing a throttle valve on the controller, the throttle valve can be adjusted to accurately control the working time of the controller and achieve the purpose of delay. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structure of the present utility model Figure 1 (High liquid level, air passage closed, vacuum passage open);

[0020] Figure 2 is a schematic structure of the present utility model Figure 2 (High liquid level, air passage closed, vacuum passage open);

[0021] Figure 3 is a schematic structure of the present utility model Figure 3 (Low liquid level, vacuum passage closed, air passage open);

[0022] Figure 4 is a schematic structure of the present utility model Figure 4 (Low liquid level, vacuum passage closed, air passage open).

[0023] In the figure:

[0024] Upper housing 1, vacuum passage 11, air outlet 111 of vacuum passage, first passage 12, second passage 13, air inlet 131 of second passage, receiving groove 14, first air port 15, second air port 16, valve interface 17, lower housing 2, first plug component 31, first plug 311, first spring 312, first spring seat 313, second plug component 32, second plug 321, second spring 322, limiting member 323, thimble component 33, thimble 331, bottom plate 332, thimble spring 333, linkage seat 34, second installation part 341, trigger mechanism 4, rubber diaphragm 41, magnet 42, trigger spring 43, magnet seat 44, fixed plate 441, first installation part 442, installation shaft 443, first air chamber a1, second air chamber a2, receiving cavity a21, high level threshold H, low level threshold L. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the protection scope of the present utility model.

[0026] Embodiment 1:

[0027] As Figures 1 - 4 shown, a liquid level control delay controller is directly connected to the liquid level, and realizes the on-off control of the controller through the floating of the liquid level. The whole process is mechanically driven without electric drive, and the use setting area is not limited.

[0028] This embodiment discloses a liquid level control delay controller, which includes an upper housing 1 and a lower housing 2 that are hermetically connected. The upper housing and the lower housing are not communicated with each other. The upper housing is provided with a vacuum channel 11, an air channel, and a switching mechanism. The vacuum channel is communicated with the external vacuum, and the air channel is communicated with the external air; a triggering mechanism 4 is arranged in the lower housing, and there is a linkage component between the triggering mechanism and the switching mechanism. The lower housing is communicated with a vacuum well, and the floating up and down of the liquid level in the vacuum well can drive the triggering mechanism to move back and forth in the lower housing. Under the action of the linkage component, the triggering mechanism can drive the switching mechanism to perform corresponding movements, so that the switching mechanism opens or closes the air channel at the first position, and opens or closes the vacuum channel at the second position.

[0029] In this embodiment, the delay controller is connected to the liquid level in the vacuum well through a connecting pipe. When the liquid level in the vacuum well rises to the high threshold H, the rising water level will squeeze the gas in the connecting pipe into the lower housing, thereby driving the triggering mechanism to act. The action of the triggering mechanism will drive the switching mechanism to act, so that it first closes the air channel at the first position, and then opens the vacuum channel at the second position, and the controller is turned on; when the liquid level in the vacuum well drops to the low threshold L, the triggering mechanism resets and drives the switching mechanism to first close the vacuum channel at the second position, and then open the air channel at the first position, and the controller is turned off.

[0030] During the startup process when the triggering mechanism is driven, the switching mechanism first closes the air channel at the first position, and then opens the vacuum channel at the second position, which can avoid the problem that air is mixed in during the process of introducing vacuum, so that more vacuum negative pressure needs to be consumed when driving downstream equipment. When the controller in the present utility model works, it first closes the air channel and then opens the vacuum channel to introduce vacuum gas, which will not cause waste and is more energy-saving. During the reset process of the triggering mechanism, the switching mechanism first closes the vacuum channel at the second position and then opens the air channel at the first position, which will not cause waste of vacuum negative pressure.

[0031] In this embodiment, the triggering mechanism 4 includes a rubber diaphragm 41, a magnet 42, and a trigger spring 43. The rubber diaphragm is disposed in the lower housing and divides the inner cavity of the lower housing into a first air chamber a1 and a second air chamber a2. The first air chamber and the second air chamber are not in communication with each other. The first air chamber is connected to the vacuum well through a connecting pipe. When the liquid level in the vacuum well rises, the gas in the connecting pipe is compressed and enters the first air chamber a1 in the lower housing. When the liquid level rises to the high threshold, the triggering mechanism is driven to act, that is, the controller is turned on.

[0032] It should be noted that during actual production, rigorous design calculations are required (including the selection of materials, models, sizes, etc. of the rubber diaphragm, trigger spring, and connecting pipe). When the liquid level in the vacuum well rises to a certain threshold, the pressure generated by the compression of the gas in the connecting pipe meets the pressure value required to drive the triggering mechanism to act. This position is set as the high threshold H; and when the liquid level drops to a certain threshold, the pressure generated by the compression of the gas in the connecting pipe does not meet the pressure value required to drive the triggering mechanism to act and drives the triggering mechanism to separate from the switching mechanism and reset. This position is set as the low threshold L.

[0033] In this embodiment, the magnet 42 is disposed in the second air chamber a2 through a magnet seat 44. The bottom of the magnet seat has a fixing plate 441, and the fixing plate 441 is fixedly connected to the rubber diaphragm. When the rubber diaphragm deforms, it drives the fixing plate to move. Specifically, there are two magnets. The magnet seat is provided with a first mounting portion 442, and the two magnets are respectively mounted on the upper and lower sides of the first mounting portion. The magnetic attraction force between the opposite-pole magnets can firmly adsorb the two magnets on the upper and lower sides of the first mounting portion. The structural design of mounting the magnets on the magnet seat is very ingenious, without the need for additional locking parts, and it is both structurally concise and reliable.

[0034] There is a space in the second air chamber a2 for the magnet to move back and forth. The middle of the magnet seat has a hollow mounting shaft 443. The upper end inside the mounting shaft is provided with the above-mentioned first mounting portion 442, and the two magnets are fixedly mounted on the first mounting portion 442 with opposite poles attracting each other; the inner top wall of the second air chamber a2 forms a receiving cavity a21 surrounding the upper end of the mounting shaft, and the upper end of the mounting shaft of the magnet seat can move in the receiving cavity a21; when the liquid level in the vacuum well rises, the rubber diaphragm deforms under the pressure of the compressed air in the connecting pipe and generates a deformation towards the second air chamber, thereby driving the magnet and the magnet seat to move away from the first air chamber and move to the top of the receiving cavity.

[0035] The trigger spring 43 is sleeved on the outer periphery of the mounting shaft of the magnet seat and is located between the bottom of the side wall of the receiving cavity a21 and the fixing plate 441. When the magnet seat moves upward, it squeezes the trigger spring. When the rebounding force of the trigger spring is greater than the deformation driving force of the rubber diaphragm (the deformation driving force of the rubber diaphragm comes from the air pressure in the connecting pipe connected to the vacuum well), it will drive the magnet seat to reset.

[0036] In this embodiment, an accommodating groove 14 is formed by inwardly concaving the outer surface of the lower housing corresponding to the outer ring part of the accommodating cavity. The upper housing is in a shape of a cover and is arranged above the lower housing.

[0037] In this embodiment, the air passage includes a first passage 12 and a second passage 13. The second passage 13 is hermetically connected to the first passage 12. The air inlet 131 of the second passage extends into the first passage. The first passage is connected to the external air. When the first passage 12 and the second passage 13 are conducted, the external air enters the first passage and flows into the inner cavity of the upper housing through the second passage. When the air inlet 131 of the second passage is blocked, the first passage and the second passage are not conducted, that is, the air passage is not conducted.

[0038] In this embodiment, a switching mechanism is provided in the upper housing 1. The switching mechanism includes a first plugging component 31, a second plugging component 32 and a thimble component 33. The first plugging component is arranged in the first passage, the second plugging component is arranged in the vacuum passage, and the thimble component is arranged in the second passage; the thimble component is used to drive the first plugging component to open or close the air passage at the first position, and to drive the second plugging component to close or open the vacuum passage at the second position.

[0039] Specifically, the thimble component 33 includes a thimble 331, a bottom plate 332 and a thimble spring 333. The thimble is fixedly connected to the bottom plate 332. The bottom plate is installed on the linkage seat 34. The thimble spring 333 is arranged below the bottom plate and is located in the accommodating groove 14 (the accommodating groove 14 formed by inwardly concaving the outer surface of the above-mentioned lower housing corresponding to the outer ring part of the accommodating cavity). The lower end of the linkage seat is located in the second passage, and the upper end is located outside the second passage; when the thimble and the bottom plate move downward, the thimble spring will be compressed, and the rebounding force of the thimble spring can drive the thimble and the bottom plate to reset; when the thimble component moves, the linkage seat moves synchronously with the thimble component, and when the thimble component is in the second position, it drives the second plugging component to perform corresponding actions; in this embodiment, the bottom plate is an iron plate, and the bottom plate and the magnet 42 form a linkage component.

[0040] Due to the strong adsorption force of the magnet on the iron plate, when the distance between the magnet and the bottom plate reaches a certain threshold, the strong adsorption force between the magnet and the bottom plate will attract the iron plate / magnet to move instantaneously and fit together towards the magnet / iron plate. Therefore, when the magnet moves to the top of the accommodating cavity a12, the adsorption force of the magnet on the bottom plate attracts the bottom plate to move instantaneously towards the magnet direction, and the thimble is fixedly connected to the bottom plate, and the thimble moves synchronously with the bottom plate. The bottom plate stops moving after being adsorbed across the accommodating cavity from the magnet; due to the combined action of the liquid level drop in the vacuum well, the rebounding force of the trigger spring being compressed, the rebounding force of the thimble spring being compressed, and the self-gravity of the trigger mechanism, etc., the magnet and the magnet seat are reset, and the bottom plate drives the thimble to reset.

[0041] In this embodiment, the first plug component 31 is disposed inside the upper housing 1. The first plug component includes a first plug 311, a first spring 312, and a first spring seat 313. The first spring is installed in the first channel through the first spring seat, and the first plug is fixedly connected to the first spring seat. In the normal state, the first plug is located at the air inlet 131 of the second channel, and the first channel is not in communication with the second channel, that is, the air channel is not in communication. It should be noted that there is no sealed connection between the first spring seat and the first channel (there is a gap between the first spring seat and the first channel). Therefore, when the first channel is in communication with the second channel, the air in the first channel can enter the second channel through the gap between the first spring and the first spring seat and the gap between the first spring seat and the inner wall of the first channel.

[0042] In this embodiment, the second plug component 32 is disposed inside the upper housing 1. The second plug component includes a second plug 321, a second spring 322, and a limiting member 323. The upper end of the linkage seat 34 has a second mounting portion 341. The limiting member is in an inverted "T" shape. The "T" shaft of the limiting member sequentially passes through the second mounting portion 341 and the second spring 322 from below the second mounting portion and is fixedly connected to the second plug 321. The second spring is located between the second plug and the second mounting portion. When the second mounting portion 341 / linkage seat 34 moves upward, the second spring is compressed.

[0043] When the thimble component 33 moves downward, the linkage seat 34 moves downward synchronously with the thimble component. The first plug 311 loses the supporting force of the thimble 331 and returns to the air inlet 131 of the second channel under the combined action of the rebound force of the first spring 312 and its own gravity. At this time, the air channel is closed, and the position where the thimble 331 is located is the first position. When the thimble component 33 leaves the first position and continues to move downward to the second position, and continues to move downward after passing through the second position, the second plug loses the supporting force of the linkage seat 34 / second spring 322 and returns to its original position under its own gravity, and the vacuum channel is opened. The thimble component continues to move downward to the lowest position, and at this time the vacuum channel is completely opened.

[0044] As can be seen from the above, during the downward movement of the thimble / linkage seat, the second position is below the first position, and the lowest position is below the second position.

[0045] Therefore, when the thimble component moves upward from the lowest position, the linkage seat moves upward synchronously with the thimble component. The second mounting portion 341 of the linkage seat 34 compresses the second spring 322 and drives the second plug to move upward to the air outlet 111 of the vacuum channel, and closes the vacuum channel at the second position. The thimble component drives the linkage seat 34 to continue to move upward to the first position. The thimble 331 abuts against the first plug 311 at the first position and pushes the first plug to move upward synchronously away from the air inlet of the second channel 13. At this time, the air channel is opened. When the thimble / linkage seat is at the highest position, the air channel is completely opened.

[0046] It should be noted that, in this embodiment, the lowest position and the highest position are two limit values ​​of the displacement stroke of the ejector pin / linkage seat; the first position and the second position are two preset positions in the displacement stroke.

[0047] That is to say, when the first plug is located at a position to block the air inlet of the second channel, the ejector pin is in the first position; when the second plug is located at a position to block the air outlet of the vacuum channel, the ejector pin is in the second position; specifically, in the first position, the ejector pin moves upward, the air channel is opened and connected, and when the ejector pin moves downward, the air channel is closed and not connected; in the second position, the ejector pin remains stationary, the vacuum channel is closed and not connected, and when the ejector pin moves downward, the vacuum channel is opened and connected.

[0048] When the second air chamber is completely sealed, the trigger mechanism cannot move upward. For this reason, in the present embodiment, the second air chamber is provided with a first air port 15 connected to the outside. When the trigger mechanism moves upward, the gas in the second air chamber will be squeezed and discharged from the first air port. A pressure difference is formed between the first air chamber and the second air chamber. In order to prevent the gas from flowing back and affecting the upward movement of the trigger mechanism, a check valve is provided at the first air port 15. Considering that the trigger mechanism can move downward, the second air chamber is also provided with a second air port 16 connected to the outside. External air enters the second air chamber from the second air port 16, eliminates the pressure difference between the first air chamber and the second air chamber, and the trigger mechanism is reset. The time period between the upward movement and the resetting of the trigger mechanism is the valve opening time of the controller. In order to accurately control the valve opening time, a throttle valve is set at the second air port 16, or instead of using the throttle valve, the diameter of the second air port is designed so that the air unit flow rate meets the design requirements, and the air inflow time is accurately controlled (the total amount of air filling the second air chamber is a known condition, and the time is the design requirement, so the unit flow rate can be calculated; furthermore, the gas flow rate is known, so the diameter of the second air port can be calculated). For convenience, the throttle valve is adjustable, which is more convenient when used. Therefore, preferably, a throttle valve is installed, and the unit flow rate can be controlled by directly adjusting the scale size of the throttle valve, so that the reset time of the trigger mechanism becomes controllable, thereby achieving precise control and achieving the purpose of delay.

[0049] Delay description: If the second air port is set, the trigger mechanism can move down normally, but if the trigger mechanism is to move down with a delay (or in other words, to make the downward movement time of the trigger mechanism controllable), a throttle valve must be set, or the diameter of the second air port must be further designed to make the downward movement time of the trigger mechanism controllable.

[0050] Of course, it is understandable that the above effect can be achieved by opening only one air port and setting a one-way throttle valve at the air port instead of setting both the check valve and the throttle valve at the same time; the one-way throttle valve is a parallel combination of a throttle valve and a one-way valve.

[0051] In this embodiment, the upper housing is further provided with a valve interface 17 for connecting to a downstream device. Vacuum negative pressure or normal pressure air is applied to the downstream device through the valve interface, thereby realizing the on / off control of the downstream device by the controller.

[0052] The operation process of this embodiment is as follows:

[0053] The delay controller of this embodiment is connected to the liquid level of the vacuum well through a connecting pipe.

[0054] In the initial state, the liquid level in the vacuum well is at a low level. The trigger mechanism of the controller does not act, the switch mechanism does not act, the air passage is open, and the vacuum passage is closed. Specifically, the rubber diaphragm 41 does not deform, the magnet 42 does not move upward, the thimble 331 does not move downward, the thimble 331 abuts against the first plug 311 in the first passage, the air inlet of the second passage 13 is not blocked, the first spring 312 is in a compressed state, the second plug 321 blocks the air outlet 111 of the vacuum pipe 11, the second spring 322 is in a compressed state, and the linkage seat 34 / thimble assembly is at the highest position.

[0055] When the liquid level in the vacuum well rises and continues to rise to the high threshold value, the gas pressure generated by the compression of the gas in the connecting pipe satisfies the pressure value for driving the trigger mechanism 4 to act. At this time, the rubber diaphragm 41 deforms towards the second air chamber a2, driving the magnet seat and the magnet to move towards the upper housing 1. When the magnet 42 moves to the top of the accommodation cavity a21 of the second air chamber, the huge magnetic adsorption force generated by the magnet (which satisfies the adsorption force value for attracting the thimble assembly to move at this time) attracts the thimble assembly 33 to move towards the magnet. The linkage seat 34 follows the thimble assembly and synchronously moves downward from the highest position. The first plug 311 loses the support of the thimble 331 and returns to the air inlet of the second passage 13 under the rebound force of the first spring 312 and its own gravity. At this time, the air passage is closed, and the thimble / linkage seat is in the first position. The thimble assembly 33 continues to move downward from the first position to the second position. When passing through the second position and continuing to move downward, the second plug 321 loses the support of the linkage seat 34 and returns under its own gravity. When the thimble / linkage seat moves to the lowest position, the vacuum passage 11 is completely opened; the controller is turned on;

[0056] When the liquid level in the vacuum well gradually drops from the high-level threshold and above to the low-level threshold, and the gas pressure value in the connecting pipe is not sufficient to overcome the resistance for the trigger mechanism to move upward, the magnet, i.e., the magnet seat, resets. The bottom plate drives the thimble to reset and drives the linkage seat to move upward synchronously from the lowest position. The linkage seat presses against the second plug and drives the second plug to move upward to block the air outlet of the vacuum channel, and the vacuum channel is closed. At this time, the thimble is at the second position. The thimble continues to move upward from the second position to the first position. At the first position, the thimble presses against the first plug and drives the first plug to move upward away from the air inlet 131 of the second channel, that is, the thimble moves upward from the first position, and the air channel is in a conducting state. When the thimble / linkage seat is at the highest position, the air channel is completely opened; the controller is turned off.

[0057] During the startup process of the controller, the switching mechanism first closes the air channel at the first position and then opens the vacuum channel at the second position, which can avoid the problem that air is mixed in during the vacuum introduction process, resulting in more consumption of vacuum negative pressure when driving downstream equipment. When the controller in the present utility model works, it first closes the air channel and then opens the vacuum channel to introduce vacuum gas. When it stops working, it first closes the vacuum channel and then opens the air channel, which will not cause waste and is more energy-efficient.

[0058] It should be noted that during actual production, rigorous design calculations are required (including the selection of materials, models, sizes, etc. of the rubber diaphragm, trigger spring, and connecting pipe). When the liquid level in the vacuum well rises to a certain threshold, the pressure generated by the compression of the gas in the connecting pipe meets the pressure value required to drive the trigger mechanism to act, and this position is set as the high-level threshold; and when the liquid level drops to a certain threshold, the pressure generated by the compression of the gas in the connecting pipe does not meet the pressure value required to drive the trigger mechanism to act and drives the trigger mechanism to separate from the switching mechanism and reset, and this position is set as the low-level threshold.

[0059] It should be noted that in this embodiment, the actions of the switching mechanism (thimble assembly, first plug assembly, second plug assembly) are all completed instantaneously. The processes of moving upward and downward are very short, and the switching between the vacuum channel and the air channel is completed instantaneously.

[0060] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0061] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0062] It should be emphasized that the above are only the preferred embodiments of the present utility model, and do not constitute any form of limitation to the present utility model. Any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A liquid level control delay controller, characterized in that: It comprises an upper shell and a lower shell which are sealed and connected, the upper shell and the lower shell are not connected to each other, the upper shell is provided with a vacuum channel, an air channel and a switch mechanism, the vacuum channel is connected to an external vacuum, and the air channel is connected to external air; a trigger mechanism is provided in the lower shell, and a linkage component is provided between the trigger mechanism and the switch mechanism, the lower shell is connected to a vacuum well, and the up and down floating of the liquid level in the vacuum well can drive the trigger mechanism to move back and forth in the lower shell, and the action of the trigger mechanism can link the switch mechanism to make corresponding movements, so that the switch mechanism opens or closes the air channel at the first position, and opens or closes the vacuum channel at the second position.

2. The liquid level control delay controller according to claim 1, characterized in that: The trigger mechanism includes a rubber diaphragm, a magnet and a trigger spring. The rubber diaphragm is arranged on the lower shell and divides the inner cavity of the lower shell into a first air chamber and a second air chamber. The first air chamber and the second air chamber are not connected to each other. The first air chamber is connected to the vacuum well. The magnet is arranged in the second air chamber through a magnet seat. The magnet seat is fixedly connected to the rubber diaphragm. The trigger spring is sleeved on the middle and outer periphery of the magnet seat. When the magnet seat moves upward, it squeezes the trigger spring.

3. The liquid level control delay controller according to claim 1, characterized in that: The air channel includes a first channel and a second channel, the second channel is sealed and connected to the first channel, the air inlet of the second channel extends into the first channel, the first channel is connected to the outside air, when the first channel and the second channel are connected, the outside air enters the first channel and flows into the inner cavity of the upper shell through the second channel, when the air inlet of the second channel is blocked, the first channel and the second channel are not connected.

4. The liquid level control delay controller according to claim 3, characterized in that: The switch mechanism comprises an ejector assembly, a first plug assembly and a second plug assembly, wherein the first plug assembly is arranged in the first channel, the second plug assembly is arranged in the vacuum channel, and the ejector assembly is arranged in the second channel; The ejector pin assembly is used to drive the first plug assembly to open or close the air passage when in the first position, and to link the second plug assembly to close or open the vacuum passage when in the second position.

5. The liquid level control delay controller according to claim 4, characterized in that: The ejector assembly includes an ejector, a base plate and an ejector spring, wherein the ejector is fixedly connected to the base plate, the base plate is mounted on a linkage seat, the ejector spring is arranged between the base plate and the lower shell, the lower end of the linkage seat is located in the second channel, and the upper end is located outside the second channel, and the ejector spring is squeezed when the ejector assembly moves downward; When the ejector assembly moves, the linkage seat moves synchronously with the ejector assembly.

6. The liquid level control delay controller according to claim 4, characterized in that: The first plug assembly includes a first plug, a first spring and a first spring seat. The first spring is installed in the first channel through the first spring seat, and the first plug is fixedly connected to the first spring seat. In normal state, the first plug is located at the air inlet of the second channel.

7. The liquid level control delay controller according to claim 5, characterized in that: The second plug assembly includes a second plug, a second spring and a limit piece. The upper end of the linkage seat has a second mounting portion. The limit piece passes through the second mounting portion and the second spring in sequence from the bottom of the second mounting portion and is fixedly connected to the second plug. The second spring is located between the second plug and the second mounting portion, and the second mounting portion squeezes the second spring when it moves upward.

8. The liquid level control delay controller according to claim 2, characterized in that: The specific structure of the magnet installed on the magnet seat is: there are two magnets, a first installation part is provided on the magnet seat, and the two magnets are respectively installed on the upper and lower sides of the first installation part, and the magnetic attraction between the magnets with different poles firmly adsorbs the two magnets on the upper and lower sides of the first installation part.

9. The liquid level control delay controller according to claim 2, characterized in that: The second air chamber is provided with a first air port communicating with the outside, and the first air port is provided with a check valve.

10. The liquid level control delay controller according to claim 2, characterized in that: The second air chamber is provided with a second air port communicating with the outside, and the second air port is provided with a throttle valve.

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