Vacuum well delayed water pumping system

Abstract

The utility model relates to a delayed pumping system for a vacuum well, which is applied to the vacuum well and comprises a controller and a vacuum valve, the controller is connected with the vacuum valve to control opening and closing of the vacuum valve, and the vacuum valve is connected between a vacuum station and the vacuum well to pump sewage in the vacuum well away; the controller comprises an air channel, a vacuum channel, a valve connector and a driving port, the valve connector is connected with the vacuum valve, the vacuum channel is connected with the vacuum station, the air channel is communicated with air, the driving port is connected with the liquid level of the vacuum well, and the liquid level in the vacuum well rises to drive the controller to close the air channel and open the vacuum channel in sequence. And the liquid level in the vacuum well descends to drive the controller to close the vacuum channel and open the air channel in sequence. By arranging the controller with the time delay function, time delay control over the vacuum valve is achieved, the risk that a vacuum water pumping system breaks down is avoided, and meanwhile more energy is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum negative pressure pumping systems, in particular to a vacuum well delayed pumping system. Background Art

[0002] The vacuum sewage collection connection pipeline of the vacuum negative pressure sewer system has very flexible length, and can be sucked by vacuum negative pressure with a pipe length ranging from 500 to 6,000 meters. However, the problems faced in actual use are that the vacuum connection pipeline section often encounters the following problems during collection in such a long area: it is necessary to climb high to cross rivers, cross bridges, or when encountering obstacles, the connection pipeline goes down and then turns up, etc. These special situations often consume a lot of vacuum lifting capacity, thereby affecting the water transmission speed and distance of the connection pipeline, resulting in water plug congestion in the connection pipeline. Therefore, the vacuum drainage system often needs to perform delayed drainage to remove the congestion or silted water in the vacuum connection pipeline and ensure the smoothness of the vacuum connection pipeline.

[0003] In the prior art, generally, a time delay control is performed on the vacuum valve, that is, a throttle valve (needle valve) is connected to the control end of the vacuum valve to control the working time of the vacuum valve to achieve the time delay purpose. Its working principle is: apply vacuum negative pressure to the control end of the vacuum valve, and the vacuum valve opens. Since a throttle valve is provided at the external interface of the control end, the vacuum negative pressure applied to the control end of the vacuum valve will gradually mix with air, and the air pressure difference between the air chambers inside the vacuum valve will gradually become smaller, and the valve will close slowly. This design has the following disadvantages: (1) For a single vacuum well drainage system: due to the slow closing of the vacuum valve, when the vacuum valve is in the half-open state, the garbage that could be pumped away when the valve is fully open will be blocked at the valve port of the half-open valve and will accumulate more and more, resulting in drainage system failures. (2) For the entire vacuum station drainage system: since the control end of the vacuum valve is directly connected to the vacuum pipeline, installing a throttle valve at the external interface of its control end is equivalent to introducing air into the vacuum pipeline. Although the aperture of 1 needle valve is small and can be ignored, for the dozens or hundreds of unit vacuum well drainage systems connected to the vacuum station, there are dozens or hundreds of throttle valves. When a large number of throttle valves introduce air simultaneously, a large amount of vacuum negative pressure of the vacuum pipeline is consumed, and the vacuum air pressure of the entire vacuum system is insufficient, which will cause the vacuum valve to be half-open or even not open, resulting in the paralysis of the overall vacuum system. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a vacuum well delayed pumping system, which realizes the time delay control of the vacuum valve by setting a controller with a time delay function, and has no risk of paralysis of the vacuum pumping system and is more energy-saving at the same time.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a vacuum well delayed pumping system, applied to a vacuum well, comprising a controller and a vacuum valve, wherein the controller is connected to the vacuum valve to control the opening and closing of the vacuum valve, and the vacuum valve is connected to the pipeline between the vacuum station and the vacuum well to pump out the sewage in the vacuum well;

[0006] The controller includes an air channel, a vacuum channel, a valve interface and a drive port, the valve interface is connected to the vacuum valve, the vacuum channel is connected to the vacuum station, the air channel is connected to the air, and the drive port is connected to the liquid level of the vacuum well. When the liquid level in the vacuum well rises, the controller is driven to first close the air channel and then open the vacuum channel. When the liquid level in the vacuum well drops, the controller is driven to first close the vacuum channel and then open the air channel.

[0007] Furthermore, the controller includes an upper shell and a lower shell that are sealed and connected, the upper shell and the lower shell are not connected to each other, the upper shell is provided with the vacuum channel, the air channel and the switch mechanism, the vacuum channel is connected to an external vacuum station, and the air channel is connected to the outside 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 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 in the first position, and opens or closes the vacuum channel in the second position.

[0008] Furthermore, 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. The trigger spring is squeezed when the magnet seat moves upward.

[0009] 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.

[0010] 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.

[0011] 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;

[0012] 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.

[0013] 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;

[0014] When the ejector assembly moves, the linkage seat moves synchronously with the ejector assembly.

[0015] 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.

[0016] 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.

[0017] Furthermore, the second air chamber is provided with a first air port and a second air port connected to the outside, the first air port is provided with a check valve, and the second air port is provided with a throttle valve.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model realizes the switch control of the whole system through the floating of the liquid level in the vacuum well. It is fully mechanized and driven, without the need for electric drive, and the use and setting area is not limited;

[0020] 2. The controller is designed with a throttle valve, which is adjustable to achieve precise control of the working time of the controller and achieve the purpose of delay.

[0021] 3. Unlike the prior art in which a throttle valve is arranged at the external interface of the vacuum valve control end (i.e., on the pipeline between the vacuum pipe and the vacuum valve and close to the vacuum valve control end), the present embodiment arranges a delay function on the controller to accurately control the opening time of the controller (the opening time here is the time between the opening and closing of the controller) so that the controller delays closing, thereby controlling the downstream vacuum valve to delay closing, thereby achieving a delay effect. Since the vacuum valve no longer has a throttle valve for delay work, the working time of the vacuum valve is completely determined by the controller. When the controller applies vacuum negative pressure to it, the vacuum valve opens quickly, and when the controller applies air to it, it closes quickly. There is no fuzzy process of half-open and half-closed with slow opening / slow closing in the middle, and there will be no clogging of the pumping system, thereby ensuring the smooth operation of the vacuum pumping system and improving the utilization efficiency and service life of the entire pumping system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 (Normal low liquid level, ejector assembly is at the highest position, air channel is open, vacuum channel is not open);

[0023] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 (The liquid level rises to the high liquid level, the ejector assembly moves from the highest position to the second position via the first position, the air channel is closed, and the vacuum channel is not conductive);

[0024] Figure 3 This is a schematic diagram of the structure of the utility model Figure 3 (High liquid level is open, the ejector assembly moves from the second position to the lowest position, the vacuum channel is opened, and the air channel is not connected);

[0025] Figure 4 This is a schematic diagram of the structure of the utility model Figure 4 (low liquid level, the ejector assembly moves from the lowest position to the first position via the second position, the vacuum channel is closed, and the air channel is not conductive);

[0026] Figure 5 This is a schematic diagram of the structure of the utility model Figure 5 (low liquid level, the ejector assembly moves from the first position to the highest position, the air channel is opened, and the vacuum channel is closed);

[0027] Figure 6 This is a schematic diagram of the structure of the controller of the utility model Figure 1 (high liquid level, air channel closed, vacuum channel open);

[0028] Figure 7 This is a schematic diagram of the structure of the controller of the utility model Figure 2 (high liquid level, air channel closed, vacuum channel open);

[0029] Figure 8 is a schematic structure of the controller of the present utility model Figure 3 (Low liquid level, vacuum channel closed, air channel open);

[0030] Figure 9 is a schematic structure of the controller of the present utility model Figure 4 (Low liquid level, vacuum channel closed, air channel open).

[0031] In the figure:

[0032] Controller A: upper housing 1, vacuum channel 11, air outlet 111 of the vacuum channel, first channel 12, second channel 13, air inlet 131 of the second channel, receiving groove 14, first air port 15, second air port 16, valve interface 17, lower housing 2, first plugging component 31, first plug 311, first spring 312, first spring seat 313, second plugging 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 disk 441, first installation part 442, installation shaft 443, drive port 5, first air chamber a1, second air chamber a2, receiving cavity a21, high-level threshold H, low-level threshold L;

[0033] Vacuum valve B. Specific embodiments

[0034] Next, the technical solutions of the present utility model will be clearly and completely described 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 efforts shall fall within the protection scope of the present utility model.

[0035] Embodiment 1:

[0036] As Figures 1 - 4 shown, a vacuum well delayed pumping system realizes the on-off control of the entire system through liquid level floating, is driven mechanized throughout the process, does not require electric drive, and the use setting area is not limited; the controller is designed with a throttle valve, and the throttle valve is adjustable to achieve precise control of the working time of the controller and achieve the purpose of delay.

[0037] This embodiment discloses a vacuum well delayed pumping system, which is applied to a vacuum well and includes a controller A and a vacuum valve B. The controller is connected to the vacuum valve to control the opening and closing of the vacuum valve, and the vacuum valve is connected between the vacuum station and the vacuum well to pump the sewage in the vacuum well away;

[0038] Controller A includes an air passage, a vacuum passage 11, a valve interface 17, and a drive port 5. The valve interface 17 is connected to vacuum valve B. The vacuum passage is connected to a vacuum station. The air passage communicates with air. The drive port 5 is connected to the liquid level of a vacuum well. When the liquid level in the vacuum well rises, the controller is driven to first close the air passage and then open the vacuum passage. When the liquid level in the vacuum well drops, the controller is driven to first close the vacuum passage and then open the air passage.

[0039] Different from the prior art where a throttle valve is provided at the vacuum valve, in this embodiment, a delay function is set on the controller to precisely control the opening time of the controller (here, the opening time is the time between the opening and closing of the controller), so that the controller closes with a delay, and then controls the vacuum valve to close with a delay, achieving a delay effect. Since no throttle valve is provided at the vacuum valve for delay operation, when the controller applies vacuum negative pressure to it, the vacuum valve opens quickly, and when the controller applies air to it, it closes quickly. There is no fuzzy process of slow opening / slow closing in the middle, so the situation of blockage in the pumping system will not occur, ensuring the smooth operation of the vacuum pumping system and improving the service efficiency and service life of the entire pumping system.

[0040] The vacuum pumping system can realize the delay closing control of the vacuum valve by setting a controller with a delay function. When the controller starts to work, it first closes the air passage and then opens the vacuum passage, which can avoid the problem that air is mixed in during the process of introducing vacuum, so that more vacuum negative pressure is consumed when driving the vacuum valve. In the controller of the present utility model, when starting to work, it first closes the air passage and then opens the vacuum passage to introduce vacuum gas. When stopping working, it first closes the vacuum passage and then opens the air passage, which will not cause waste and is more energy-saving.

[0041] The following further describes the structure and principle of the controller with a delay function in conjunction with the accompanying drawings.

[0042] As Figures 6 - 9 shown, the controller includes an upper housing 1 and a lower housing 2 that are hermetically connected. The upper housing and the lower housing are not in communication with each other. The upper housing is provided with a vacuum passage 11, an air passage, and a switching mechanism. The vacuum passage communicates with the external vacuum, and the air passage communicates with the external air. A triggering mechanism 4 is provided inside the lower housing. There is a linkage component between the triggering mechanism and the switching mechanism. The lower housing communicates with the vacuum well. The up and down floating of the liquid level in the vacuum well can drive the triggering mechanism to move back and forth inside the lower housing. Under the action of the linkage component, the triggering mechanism can drive the switching mechanism to make corresponding movements, so that the switching mechanism opens or closes the air passage at the first position, and opens or closes the vacuum passage at the second position.

[0043] 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 trigger mechanism to act. The action of the trigger mechanism will drive the switch mechanism to act, so that it closes the air passage at the first position and opens the vacuum passage 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 trigger mechanism resets and drives the switch mechanism to close the vacuum passage at the second position and open the air passage at the first position, and the controller is turned off.

[0044] During the startup process when the trigger mechanism is driven, the switch mechanism first closes the air passage at the first position and then opens the vacuum passage at the second position, which can avoid the problem that air is mixed in during the vacuum introduction process, resulting in more vacuum negative pressure consumption when driving the vacuum valve. When the controller in the present invention works, it first closes the air passage and then opens the vacuum passage to introduce vacuum gas. When it stops working, it first closes the vacuum passage and then opens the air passage, which will not cause waste and is more energy-efficient.

[0045] In this embodiment, the trigger mechanism 4 includes a rubber diaphragm 41, a magnet 42, and a trigger spring 43. The rubber diaphragm is arranged 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 connected to 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, it drives the trigger mechanism to act, that is, the controller is turned on.

[0046] It should be noted that during actual production, rigorous design calculations (including the selection of materials, models, and sizes of the rubber diaphragm, trigger spring, and connecting pipe, etc.) are required so that 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. 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 trigger mechanism to act and drives the trigger mechanism to separate from the switch mechanism and reset. This position is set as the low threshold L.

[0047] In this embodiment, the magnet 42 is arranged 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 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 magnet on the magnet seat is very ingenious, without the need for additional locking parts, and it is both structurally concise and reliable.

[0048] The second air chamber a2 has space for the magnet to move back and forth, and the middle part of the magnet seat has a hollow mounting shaft 443. The upper end of the inner part of the mounting shaft is provided with the above-mentioned first mounting part 442, and the two magnets are fixedly mounted on the first mounting part 442 by attracting each other with opposite poles; the inner top wall of the second air chamber a2 forms a accommodating 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 accommodating cavity a21; when the liquid level in the vacuum well rises, the rubber diaphragm is deformed toward the second air chamber due to the pressure of the compressed air in the connecting pipe, thereby driving the magnet and the magnet seat to move in a direction away from the first air chamber and move to the top of the accommodating cavity.

[0049] The trigger spring 43 is sleeved on the outer circumference of the mounting shaft of the magnet seat and is located between the bottom of the side wall of the accommodating chamber a21 and the fixed plate 441. When the magnet seat moves upward, it squeezes the trigger spring. When the rebound force of the trigger spring is greater than the deformation driving force exerted on 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), the magnet seat will be driven to reset.

[0050] In this embodiment, the outer surface of the lower shell body corresponding to the outer circle portion of the accommodating cavity is concave to form a circle of accommodating grooves 14, and the upper shell body is configured to be in the shape of a cover, which is disposed above the lower shell body.

[0051] In this embodiment, the air channel includes a first channel 12 and a second channel 13. The second channel 13 is sealed and connected to the first channel 12. The air inlet 131 of the second channel extends into the first channel. The first channel is connected to the external air. When the first channel 12 and the second channel 13 are connected, the external air enters the first channel and flows into the inner cavity of the upper shell through the second channel. When the air inlet 131 of the second channel is blocked, the first channel and the second channel are not connected, that is, the air channel is not connected.

[0052] In this embodiment, a switch mechanism is provided in the upper shell 1, and the switch mechanism includes a first plug assembly 31, a second plug assembly 32 and a ejector assembly 33. The first plug assembly is provided in the first channel, the second plug assembly is provided in the vacuum channel, and the ejector assembly is provided in the second channel; the ejector assembly is used to drive the first plug assembly to open or close the air channel when in the first position, and to drive the second plug assembly to close or open the vacuum channel when in the second position.

[0053] Specifically, the ejector assembly 33 includes an ejector 331, a base plate 332 and an ejector spring 333. The ejector is fixedly connected to the base plate 332, and the base plate is mounted on the linkage seat 34. The ejector spring 333 is disposed below the base plate and is located in the accommodating groove 14 (the outer surface of the lower shell body described above corresponds to the outer ring portion of the accommodating cavity and is concave to form a circle of accommodating groove 14). The lower end of the linkage seat is located in the second channel, and the upper end is located outside the second channel. The downward movement of the ejector and the base plate will squeeze the ejector spring, and the rebound force of the ejector spring can drive the ejector and the base plate to reset. When the ejector assembly moves, the linkage seat moves synchronously with the ejector assembly, and when the ejector assembly is in the second position, the linkage seat performs corresponding actions with the second plug assembly. In this embodiment, the base plate is an iron plate, and the base plate and the magnet 42 constitute a linkage assembly.

[0054] Since the magnet has a strong adsorption force 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 toward the magnet / iron plate instantly and fit together. Therefore, when the magnet moves to the top of the accommodating chamber a12, the adsorption force of the magnet on the bottom plate attracts the bottom plate to move toward the magnet instantly, and the ejector pin is fixedly connected to the bottom plate, and the ejector pin moves synchronously with the bottom plate. The bottom plate moves to the magnet across the accommodating chamber and then stops. Due to the combined effect of the drop in liquid level in the vacuum well, the rebound force of the squeezed trigger spring, the rebound force of the squeezed ejector spring, and the gravity of the trigger mechanism itself, the magnet and the magnet seat are reset, and the bottom plate drives the ejector pin to reset.

[0055] In this embodiment, the first plug assembly 31 is arranged in the upper shell 1, and the first plug assembly 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 normal state, the first plug is located at the air inlet 131 of the second channel, and the first channel is not connected to the second channel, that is, the air channel is not connected. It should be noted that the first spring seat and the first channel are not sealed (there is a gap between the first spring seat and the first channel). Therefore, when the first channel and the second channel are connected, 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.

[0056] In this embodiment, the second plug assembly 32 is arranged in the upper shell body 1, and the second plug assembly includes a second plug 321, a second spring 322 and a limit member 323. The upper end of the linkage seat 34 has a second mounting portion 341, and the limit member is set to an inverted "T" shape. The "T" axis of the limit member passes through the second mounting portion 341 and the second spring 322 in sequence from the bottom of 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, and the second mounting portion 341 / linkage seat 34 moves upward to squeeze the second spring.

[0057] When the thimble assembly 33 moves downward, the linkage seat 34 moves downward synchronously with the thimble assembly. 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 rebounding 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 assembly 33 moves away from the first position and continues to move downward to the second position, and continues to move downward after passing the second position, the second plug loses the supporting force of the linkage seat 34 / the second spring 322 and returns under its own gravity, and the vacuum channel is opened. The thimble assembly continues to move downward to the lowest position, and at this time the vacuum channel is completely opened.

[0058] 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.

[0059] Therefore, when the thimble assembly moves upward from the lowest position, the linkage seat moves upward synchronously with the thimble assembly. The second mounting portion 341 of the linkage seat 34 presses 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 assembly drives the linkage seat 34 to continue to move upward to the first position. The thimble 331 presses 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 conducted and opened. When the thimble / linkage seat is at the highest position, the air channel is completely opened.

[0060] It should be noted that in this embodiment, the lowest position and the highest position are two extreme values of the displacement stroke of the thimble / linkage seat; the first position and the second position are two preset positions in the displacement stroke.

[0061] That is to say, when the first plug is at the position of blocking the air inlet of the second channel, the thimble is at the first position; when the second plug leaves the position of blocking the air outlet of the vacuum channel, the thimble is at the second position. Specifically, at the first position, when the thimble moves upward, the air channel is conducted / opened, and when the thimble moves downward, the air channel is not conducted / closed; at the second position, when the thimble remains stationary, the vacuum channel is closed and not conducted, and when the thimble moves downward, the vacuum channel is opened and conducted.

[0062] When the second air chamber is completely sealed, the triggering mechanism cannot move upward. Therefore, in this embodiment, the second air chamber is provided with a first air port 15 communicating with the outside. When the triggering mechanism moves upward, it will squeeze the gas in the second air chamber out through the first air port, creating a pressure difference between the first air chamber and the second air chamber. To prevent gas from flowing back and affecting the upward movement of the triggering mechanism, a check valve is provided at the first air port. Considering that the triggering mechanism can move downward, the second air chamber is also provided with a second air port 16 communicating with the outside. External air enters the second air chamber through the second air port 16, relieving the pressure difference between the first air chamber and the second air chamber, and the triggering mechanism resets. The time period between the upward movement and the reset of the triggering mechanism is the controller opening time. To accurately control the opening time, a throttle valve is provided at the second air port 16, or instead of using a throttle valve, the diameter of the second air port is designed so that the unit air flow rate meets the design requirements, accurately controlling the air inflow time (the total air flow rate for 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 velocity is known, so the diameter of the second air port can be calculated). For convenience, the throttle valve is adjustable and more convenient to use. Therefore, preferably, a throttle valve is installed, and the scale of the throttle valve can be directly adjusted to control the unit flow rate, making the reset time of the triggering mechanism controllable, and thus achieving accurate control and the purpose of delaying.

[0063] Delay description: By setting the second air port, the triggering mechanism can move downward normally. However, to delay the downward movement of the triggering mechanism (or in other words, make the downward movement time of the triggering mechanism controllable), a throttle valve needs to be set, or further design the diameter of the second air port to make the downward movement time of the triggering mechanism controllable.

[0064] Of course, it can be understood that by only opening one air port and setting a one-way throttle valve at this air port to replace the check valve and the throttle valve, the above effects can also be achieved; the one-way throttle valve is a combination of a throttle valve and a one-way valve in parallel.

[0065] In this embodiment, the controller A applies vacuum negative pressure or normal pressure air to the downstream vacuum valve B through the valve interface 17, thereby realizing the on-off control of the controller over the downstream vacuum valve.

[0066] The operation process of this embodiment is as follows:

[0067] Vacuum pumping system setup: The controller is connected to the vacuum valve to control the opening and closing of the vacuum valve. The vacuum valve is connected between the vacuum station and the vacuum well to pump the sewage in the vacuum well away. The controller is connected through a connecting pipe to the liquid level in the vacuum well.

[0068] In the initial state, the liquid level in the vacuum well is at a low level. The trigger mechanism of the controller does not actuate, the switching mechanism does not actuate, the air passage is open, and the vacuum passage is closed. That is, the controller does not actuate and the vacuum valve does not actuate. Specifically, the internal state when the controller does not actuate is as follows: the rubber diaphragm 41 does not deform, the magnet 42 does not move upward, the ejector pin 331 does not move downward, the ejector pin 331 presses against the first plug 311 and is located 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 / ejector pin assembly is at the highest position.

[0069] When the liquid level in the vacuum well rises and continuously rises to the high threshold value, the controller starts to actuate. The specific internal state is as follows: the gas pressure generated by compressing the gas in the connecting pipe between the controller and the vacuum well meets the pressure value required to drive the trigger mechanism 4 to actuate. 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 receiving cavity a21 of the second air chamber, the huge magnetic adsorption force generated by the magnet (which meets the adsorption force value required to attract the ejector pin assembly to move at this time) attracts the ejector pin assembly 33 to move towards the magnet. The linkage seat 34 follows the ejector pin assembly and synchronously moves downward from the highest position. The first plug 311 loses the support force of the ejector pin 331 and returns to the air inlet of the second passage 13 under the rebounding force of the first spring 312 and its own gravity. At this time, the air passage is closed and the ejector pin is in the first position. The ejector pin 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 force of the linkage seat 34 and returns under the rebounding force of the second spring 322 and its own gravity. When the ejector pin / linkage seat moves to the lowest position, the vacuum passage 11 is completely opened. The controller starts to drive the downstream vacuum valve to open and start pumping water.

[0070] When the liquid level in the vacuum well gradually drops from the high threshold value and above to the low threshold value, when the gas pressure value in the connecting pipe between the controller and the vacuum well is not sufficient to overcome the resistance of the trigger mechanism inside the controller to move upward, the magnet, that is, the magnet seat resets. The bottom plate drives the ejector pin to reset and drives the linkage seat to synchronously move upward 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 passage. The vacuum passage is closed. At this time, the ejector pin is at the second position. The ejector pin continues to move upward from the second position to the first position. At the first position, the ejector pin presses against the first plug and drives the first plug to move upward away from the air inlet 131 of the second passage, that is, the ejector pin moves upward from the first position, and the air passage is in a conducting state. When the ejector pin / linkage seat is at the highest position, the air passage is completely opened. At this time, the controller is closed and the vacuum valve stops pumping water.

[0071] During the startup process of the controller, the switching mechanism first closes the air passage at the first position and then opens the vacuum passage at the second position, which can avoid the problem that air is mixed in during the introduction of vacuum, resulting in the need to consume more vacuum negative pressure when driving the vacuum valve. When the controller in the present utility model works, it first closes the air passage and then opens the vacuum passage to introduce vacuum gas. When it stops working, it first closes the vacuum passage and then opens the air passage, which will not cause vacuum waste and is more energy-efficient.

[0072] This embodiment is different from the delay layout of setting a throttle valve at the external interface of the control end of the vacuum valve in the prior art. In this embodiment, a delay function is set on the controller to precisely control the opening time of the controller (here, the opening time is the time between the opening and closing of the controller), so that the controller closes with a delay, and then controls the vacuum valve to close with a delay to achieve the delay effect; since the vacuum valve no longer sets a throttle valve for delay operation, when the controller applies vacuum negative pressure to it, the vacuum valve opens quickly, and when the controller applies air to it, the vacuum valve closes quickly. There is no fuzzy process of slow opening / slow closing in the middle, and the situation of blockage in the pumping system will not occur, ensuring the smooth operation of the vacuum pumping system and improving the service efficiency and service life of the entire pumping system.

[0073] 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 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 threshold.

[0074] It should be noted that the actions of the switching mechanism (the thimble assembly, the first plug assembly, and the second plug assembly) in this embodiment are all completed instantaneously, and the processes of moving up and down are very short, and the switching between the vacuum passage and the air passage is completed instantaneously.

[0075] 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. It 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", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0076] 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 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 an indirect connection through an intermediate medium, and it can 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.

[0077] It should be emphasized that the above are only the preferred embodiments of the present utility model, and it does not impose any form of limitation on 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 vacuum well delayed pumping system, applied to a vacuum well, characterized in that, It includes a controller and a vacuum valve, wherein the controller is connected to the vacuum valve to control the opening and closing of the vacuum valve, and the vacuum valve is connected to the pipeline between the vacuum station and the vacuum well to extract the sewage in the vacuum well; The controller includes an air channel, a vacuum channel, a valve interface and a drive port, the valve interface is connected to the vacuum valve, the vacuum channel is connected to the vacuum station, the air channel is connected to the external air, and the drive port is connected to the liquid level of the vacuum well. When the liquid level in the vacuum well rises, the controller is driven to first close the air channel and then open the vacuum channel. When the liquid level in the vacuum well drops, the controller is driven to first close the vacuum channel and then open the air channel.

2. The vacuum well delayed pumping system according to claim 1, wherein The controller includes an upper shell and a lower shell that are sealed and connected. The upper shell and the lower shell are not connected to each other. The upper shell is provided with the vacuum channel, the air channel and the switch mechanism. The vacuum channel is connected to an external vacuum station, and the air channel is connected to the external air. A trigger mechanism is provided in the lower shell. A linkage component is provided between the trigger mechanism and the switch mechanism. 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. 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 in the first position, and opens or closes the vacuum channel in the second position.

3. The vacuum well delayed pumping system according to claim 2, 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.

4. The vacuum well delayed pumping system according to claim 3, 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.

5. The vacuum well delayed pumping system according to claim 2, 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.

6. The vacuum well delayed pumping system according to claim 5, wherein, 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.

7. The vacuum well delayed pumping system according to claim 6, characterized in that, The thimble assembly includes a thimble, a bottom plate, and a thimble spring. The thimble is fixedly connected to the bottom plate, the bottom plate is installed on the linkage seat, the thimble spring is arranged between the bottom plate and the lower housing. The lower end of the linkage seat is located in the second channel, and the upper end is located outside the second channel. When the thimble assembly moves downward, it compresses the thimble spring; When the thimble assembly moves, the linkage seat moves synchronously with the thimble assembly.

8. The vacuum well delayed pumping system according to claim 6, characterized in that, The first plug component 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 the normal state, the first plug is located at the air inlet of the second channel.

9. The vacuum well delayed pumping system according to claim 7, wherein The second plug component includes a second plug, a second spring, and a limiting member. The upper end of the linkage seat has a second mounting portion. The limiting member sequentially passes through the second mounting portion and the second spring from below 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. When the second mounting portion moves upward, it compresses the second spring.

10. The vacuum well delayed pumping system according to claim 3, characterized in that, The second air chamber is provided with a first air port and a second air port communicating with the outside. The first air port is provided with a check valve, and the second air port is provided with a throttle valve.

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