Liquid level control system and liquid level control method

Abstract

The present invention discloses a liquid level control system and a liquid level control method, the liquid level control system comprises: a water tank, a first float guide valve and a second float guide valve are installed, the first float guide valve is arranged below the second float guide valve; a water supply main pipe is used to supply water to the water tank; a liquid level control valve is installed on the water supply main pipe; the liquid level control valve comprises a valve body, a main valve cover, an auxiliary valve cover, a main diaphragm and an auxiliary diaphragm, the valve body has a medium channel, the water inlet end and the water outlet end of the medium channel are connected through the main water supply port and / or the auxiliary water supply port; the main diaphragm can seal the main water supply port, and a first chamber is formed between the main diaphragm and the main valve cover; the auxiliary diaphragm can seal the auxiliary water supply port, and a second chamber is formed between the auxiliary diaphragm and the auxiliary valve cover; an adjusting component comprises an adjusting rod, and the adjusting rod is used to limit the auxiliary diaphragm to the end of the stroke. According to the liquid level control system of the present invention, the frequent opening and closing of the main valve can be avoided, the service life of the main valve and the float guide valve can be extended, and the regulating and storing function of the water tank can be fully utilized.

Description

Technical Field

[0001] The present invention relates to the technical field of water supply equipment, and in particular to a liquid level control system and a liquid level control method. Background Art

[0002] The hydraulic float valve is an important automatic water replenishment device for current pools or water tanks. The valve is a combination of a main valve and a float pilot valve. The float pilot valve is installed in the pool and automatically opens and closes according to the water level change, thereby controlling the opening and closing of the main valve and dynamically replenishing the water tank. Currently, the float pilot valve is installed in the pool at a high water level slightly lower than the overflow port. Once the water level in the pool drops slightly, the pilot valve will open to drive the main valve to fully open to replenish water in the pool, which will cause the following problems:

[0003] 1. The main valve replenishes water quickly. When the main valve is opened, the liquid level in the water tank rises rapidly, causing the water tank to be in a high water level state for a long time and the water circulation renewal rate is low;

[0004] 2. Frequent start and stop of the main valve will cause the float floating on the water surface to swing frequently and greatly, which may easily cause damage to the float guide valve or detachment of the float, thus causing the main valve to fail;

[0005] 3. The "large opening and closing" and "fast opening and closing" of the main valve will lead to unstable pressure in the upstream water supply main. During peak periods, the water supply main needs to rush to increase water and pressure, and during low periods, the water supply main will produce valve closing water hammer, increasing the risk of damage to the upstream pipeline. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a liquid level control system, which has a large flow water replenishment mode and a small flow water replenishment mode, effectively reduces the opening and closing times of the float pilot valve, avoids the frequent opening and closing of the main valve, thereby extending the service life of the main valve and the float pilot valve, and fully exerts the regulating and storage function of the water tank.

[0007] The present invention also provides a liquid level control method suitable for the above liquid level control system.

[0008] A liquid level control system according to an embodiment of the first aspect of the present invention comprises:

[0009] A water tank is provided with a first float pilot valve and a second float pilot valve, wherein the first float pilot valve is arranged below the second float pilot valve;

[0010] A water supply main pipe, used for supplying water to the water tank;

[0011] A liquid level control valve is installed on the water supply main pipe and is used to control the on-off of the water supply main pipe; the liquid level control valve comprises a valve body, a main valve cover, an auxiliary valve cover, a main diaphragm and an auxiliary diaphragm, and the main valve cover and the auxiliary valve cover are both installed on the valve body; the valve body has a medium channel, and the medium channel has a water inlet end and a water outlet end; the valve body is provided with a main water supply port and an auxiliary water supply port, and the main water supply port and the auxiliary water supply port are both arranged in the medium channel, and the water inlet end and the water outlet end are connected through the main water supply port and / or the auxiliary water supply port; a main valve seat is provided at the main water supply port, and an auxiliary valve seat is provided at the auxiliary water supply port, the main valve cover corresponds to the main valve seat, and the auxiliary valve cover corresponds to the auxiliary valve seat; the main diaphragm is movably installed between the main valve cover and the main valve seat, and the auxiliary diaphragm is movably installed between the auxiliary valve cover and the auxiliary valve seat;

[0012] The main diaphragm is equipped with a main valve plug, which can be sealed and connected with the main valve seat to close the main water supply port; a first chamber is formed between the main diaphragm and the main valve cover; the main diaphragm is provided with a first through hole, and the first through hole is used to connect the water inlet end of the medium channel and the first chamber; the main valve cover is provided with a main control hole that penetrates the main valve cover, and the first float pilot valve is connected to the main control hole;

[0013] The auxiliary diaphragm is equipped with an auxiliary valve plug, which can be sealed and connected with the auxiliary valve seat to close the auxiliary water supply port; a second chamber is formed between the auxiliary diaphragm and the auxiliary valve cover; the auxiliary diaphragm is provided with a second through hole, and the second through hole is used to connect the water inlet end of the medium channel and the second chamber; the auxiliary valve cover is provided with an auxiliary control hole penetrating the auxiliary valve cover, and the second float pilot valve is connected to the auxiliary control hole;

[0014] The regulating assembly comprises a regulating rod, the middle part of which is slidably arranged in the auxiliary valve cover, and the bottom end of which extends into the second chamber; the regulating rod is used to limit the stroke end position of the auxiliary valve plug.

[0015] The liquid level control system according to the embodiment of the present invention has at least the following beneficial effects:

[0016] A main water supply port is provided to supply water at a large flow rate into the water tank, and an auxiliary water supply port is provided to supply water at a small flow rate into the water tank. Small flow rate water supply is mainly used to reduce large flow rate water supply, which can effectively reduce the action of the first float pilot valve and the second float pilot valve, thereby extending the service life of the equipment; the first float pilot valve is automatically opened and closed according to the water level in the water tank, which can realize automatic water replenishment of the water tank without additional power, and can greatly improve the applicable scenarios; mainly through small flow rate water replenishment, the impact on the upstream pipe network pressure can be effectively reduced.

[0017] According to some embodiments of the present invention, the auxiliary valve cover is provided with a mounting hole and a guide groove, the mounting hole passes through the auxiliary valve cover, the adjusting rod is slidably arranged in the mounting hole; the guide groove is arranged on the side wall of the mounting hole and is communicated with the mounting hole;

[0018] The adjusting assembly comprises a guide pin, which is radially arranged in the middle of the adjusting rod and installed in the guide groove; the adjusting rod moves along its axial direction and can drive the guide pin to slide along the guide groove.

[0019] According to some embodiments of the present invention, the adjusting assembly also includes a pressure cover and an adjusting nut, wherein the adjusting nut is rotatably installed on the auxiliary valve cover around its own axis, and the adjusting nut is threadedly connected to the top of the adjusting rod; the pressure cover is connected to the auxiliary valve cover to limit the movement of the adjusting nut along the axial direction of the adjusting rod; the rotation of the adjusting nut around its own axis can drive the adjusting rod to slide along its axial direction.

[0020] According to some embodiments of the present invention, the adjustment assembly further includes an electric adjustment structure, and the electric adjustment structure is used to drive the adjustment nut to rotate around its own axis.

[0021] According to some embodiments of the present invention, the first float pilot valve is connected to the main control hole through a main control pipe, and a first water flow sensor is installed on the main control pipe;

[0022] The second float pilot valve is connected to the auxiliary control hole through an auxiliary control pipe, and a second water flow sensor is installed on the auxiliary control pipe.

[0023] According to some embodiments of the present invention, the secondary control pipe is also equipped with an electric valve for controlling its on-off.

[0024] The liquid level control method according to the second aspect of the present invention is applicable to the above-mentioned liquid level control system; the control method is as follows:

[0025] When the water level in the water tank drops to a second set low water level, the second float pilot valve opens, the auxiliary control hole is connected to the atmosphere, the auxiliary water supply port is opened, and the water supply main pipe supplies water at a small flow rate into the water tank; when the water level in the water tank rises to a second set high water level, the second float pilot valve closes, the auxiliary control hole is closed, the auxiliary valve plug is sealed and connected to the auxiliary valve seat to close the auxiliary water supply port, and the second water flow sensor sends a second action signal;

[0026] When the water level in the water tank drops to a first set low water level, the first float pilot valve opens, the main control hole is connected to the atmosphere, the main water supply port is opened, and the water supply main pipe supplies water to the water tank at a large flow rate; when the water level in the water tank rises to a first set high water level, the first float pilot valve closes, the main control hole is closed, the main valve plug is sealed and connected to the main valve seat to close the main water supply port, and the first water flow sensor sends a first action signal;

[0027] The electric adjustment structure drives the adjustment rod to slide along its axis direction according to the first action signal or the second action signal;

[0028] The electric valve has an open state and a closed state. The electric valve is in the open state when it is not actuated. Before the electric adjustment structure is actuated, a first adjustment signal is sent to the electric valve to switch the electric valve from the open state to the closed state. After the electric adjustment structure is actuated, a second adjustment signal is sent to the electric valve to switch the electric valve from the closed state to the open state. When the electric valve is in the closed state, the secondary control hole is closed.

[0029] According to some embodiments of the present invention, the electric adjustment structure drives the adjustment rod to slide a first distance along its axial direction away from the auxiliary valve plug according to the first action signal, and the electric adjustment structure drives the adjustment rod to slide a second distance along its axial direction toward the auxiliary valve plug according to the second action signal; wherein the first distance is N 1 times the preset unit distance, the second distance is N 2 times the preset unit distance, N 1 、N 2 All are positive integers.

[0030] According to some embodiments of the present invention, the length of the guide groove is taken as a reference length, and the reference length is evenly divided into a plurality of preset segments, and the length of each preset segment is equal to the preset unit distance.

[0031] According to some embodiments of the present invention, within a unit time period, the first action signal accumulates to a first set number of times, and the electric adjustment structure drives the adjustment rod to slide the first distance in a direction away from the auxiliary valve plug;

[0032] When the second action signal accumulates to a second set number of times, the electric adjustment structure drives the adjustment rod to slide the second distance toward the auxiliary valve plug;

[0033] In a unit time period, the adjusting rod can only slide the first distance once and the second distance twice; after the adjusting rod slides the first distance once, the number of the second action signals is accumulated again.

[0034] The liquid level control method according to the embodiment of the present invention has at least the following beneficial effects:

[0035] The operation noise is low, which can effectively avoid the frequent action of the main valve plug and the auxiliary valve plug, extend the service life of the liquid level control system, reduce the impact on the upstream pipe network pressure, and reduce the risk of damage to the upstream pipeline.

[0036] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0038] Figure 1 It is a structural schematic diagram of a liquid level control system according to an embodiment of the present invention;

[0039] Figure 2 for Figure 1 Schematic diagram of the structure of the medium level control valve;

[0040] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0041] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0042] Figure Number:

[0043] Water tank 1000, overflow pipe 1010, water outlet pipe 1020, first float pilot valve 1100, second float pilot valve 1200, main control pipe 1300, first water flow sensor 1310, auxiliary control pipe 1400, second water flow sensor 1410, electric valve 1420, DC generator 1430;

[0044] Water supply mains 2000;

[0045] Liquid level control valve 3000, valve body 3100, medium channel 3110, water inlet 3111, water outlet 3112, main water supply port 3120, main valve seat 3121, auxiliary water supply port 3130, auxiliary valve seat 3131, main valve cover 3200, limit block 3201, main diaphragm 3210, first chamber 3211, first through hole 3212, main control hole 3213, main valve plug 3220, main pressure plate 3230, main spring 3240, abutment plate 3241, auxiliary valve cover 3300, mounting hole 3301, guide groove 3302, auxiliary diaphragm 3310, second chamber 3311, second through hole 3312, auxiliary control hole 3313, auxiliary valve plug 3320, auxiliary pressure plate 3330, auxiliary spring 3340, adjustment assembly 3400, adjustment rod 3410, guide pin 3420, pressure cover 3430, adjustment nut 3440, electric adjustment structure 3450. DETAILED DESCRIPTION

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0048] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0049] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0050] Reference Figures 1 to 4The liquid level control system of the embodiment of the present invention includes a water tank 1000, a water supply main pipe 2000 and a liquid level control valve 3000. The water supply main pipe 2000 is used to supply water to the water tank 1000. The liquid level control valve 3000 is installed on the water supply main pipe 2000 to control the on and off of the water supply main pipe 2000. The first float pilot valve 1100 and the second float pilot valve 1200 are installed in the water tank 1000, and the first float pilot valve 1100 is arranged below the second float pilot valve 1200; the water tank 1000 is also connected with a water outlet pipe 1020 and an overflow pipe 1010, and the water outlet pipe 1020 is arranged below the first float pilot valve 1100, and the overflow pipe 1010 is flush with the second float pilot valve 1200; the first float pilot valve 1100 is connected to the liquid level control valve 3000 through the main control pipe 1300, and the second float pilot valve 1200 is connected to the liquid level control valve 3000 through the auxiliary control pipe 1400. Specifically, the first float pilot valve 1100 and the second float pilot valve 1200 can adopt the float valve in the patent application number CN202322004231.7, and the patent name is "A double liquid level float valve capable of realizing adjustable opening and closing liquid level difference".

[0051] In the embodiments of the present invention, referring to Figures 2 to 4 As shown, the liquid level control valve 3000 includes a valve body 3100, a main valve cover 3200, an auxiliary valve cover 3300, a main diaphragm 3210 and an auxiliary diaphragm 3310. The main valve cover 3200 and the auxiliary valve cover 3300 are both installed on the valve body 3100. The main diaphragm 3210 is movably installed between the main valve cover 3200 and the main valve seat 3121, and the auxiliary diaphragm 3310 is movably installed between the auxiliary valve cover 3300 and the auxiliary valve seat 3131. Specifically, the main valve cover 3200 and the valve body 3100 are connected by fasteners such as bolts, and the edge of the main diaphragm 3210 is pressed between the main valve cover 3200 and the valve body 3100. Similarly, the auxiliary valve cover 3300 and the valve body 3100 are connected by fasteners such as bolts, and the edge of the auxiliary diaphragm 3310 is pressed between the auxiliary valve cover 3300 and the valve body 3100. Figure 2 For example, the middle portion of the main diaphragm 3210 and the middle portion of the auxiliary diaphragm 3310 can both undergo elastic deformation in the vertical direction.

[0052] In an embodiment of the present invention, the valve body 3100 has a medium channel 3110, and the medium channel 3110 has a water inlet end 3111 and a water outlet end 3112; the valve body 3100 is provided with a main water supply port 3120 and an auxiliary water supply port 3130, and the main water supply port 3120 and the auxiliary water supply port 3130 are both arranged in the medium channel 3110, and the water inlet end 3111 and the water outlet end 3112 are connected through the main water supply port 3120 and / or the auxiliary water supply port 3130; a main valve seat 3121 is provided at the main water supply port 3120, and an auxiliary valve seat 3131 is provided at the auxiliary water supply port 3130, the main valve cover 3200 corresponds to the main valve seat 3121, and the auxiliary valve cover 3300 corresponds to the auxiliary valve seat 3131. The main diaphragm 3210 is equipped with a main valve plug 3220, which can be sealed with the main valve seat 3121 to close the main water supply port 3120; the auxiliary diaphragm 3310 is equipped with an auxiliary valve plug 3320, which can be sealed with the auxiliary valve seat 3131 to close the auxiliary water supply port 3130. Specifically, the medium at the water inlet end 3111 of the medium channel 3110 can enter the water outlet end 3112 through the main water supply port 3120, and the medium at the water inlet end 3111 of the medium channel 3110 can also enter the water outlet end 3112 through the auxiliary water supply port 3130, or the medium at the water inlet end 3111 of the medium channel 3110 can enter the water outlet end 3112 through the main water supply port 3120 and the auxiliary water supply port 3130 at the same time; the main water supply port 3120 is mainly used to supply a large flow of water into the water tank 1000, and the auxiliary water supply port 3130 is mainly used to supply a large flow of water into the water tank 1000, and the auxiliary water supply port 3130 is mainly used to supply a large flow of water into the water tank 1000, and the auxiliary water supply port 3130 is mainly used to supply a large flow of water into the water tank 1000. 130 is mainly used to supply water at a small flow rate to the water tank 1000. When the water level in the water tank 1000 is insufficient during the peak water usage period, a large flow of water can be supplied to the water tank 1000 through the main water supply port 3120 to maintain the water level in the water tank 1000. During the low water usage period, a small flow of water can be continuously supplied to the water tank 1000 through the auxiliary water supply port 3130 to reduce the action of the liquid level control valve 3000 while maintaining the liquid level in the water tank 1000, thereby reducing the disturbance to the upstream pipe network pressure and extending the service life of the equipment.

[0053] In the embodiment of the present invention, the liquid level control valve 3000 is also equipped with an adjustment assembly 3400, which includes an adjustment rod 3410, the middle part of which is slidably arranged in the auxiliary valve cover 3300, and the bottom end of the adjustment rod 3410 extends into the second chamber 3311; the adjustment rod 3410 is used to limit the stroke end of the auxiliary valve plug 3320. It should be understood that the auxiliary valve plug 3320 is limited to the stroke end by the adjustment rod 3410, so the distance that the auxiliary valve plug 3320 can move relative to the auxiliary valve seat 3131 is limited, that is, the auxiliary water supply port 3130 can only supply water at a small flow rate.

[0054] It is conceivable that the aperture of the main water supply port 3120 is preferably larger than the aperture of the auxiliary water supply port 3130 .

[0055] In the embodiment of the present invention, the liquid level control valve 3000 of the present embodiment mainly realizes the switching of the liquid level control valve 3000 between large flow water supply and small flow water supply through the first float pilot valve 1100 and the second float pilot valve 1200. Specifically, a first chamber 3211 is formed between the main diaphragm 3210 and the main valve cover 3200; the main diaphragm 3210 is provided with a first through hole 3212, and the first through hole 3212 is used to connect the water inlet end 3111 of the medium channel 3110 and the first chamber 3211; the main valve cover 3200 is provided with a through hole 3212 extending through the main diaphragm 3210. The main control hole 3213 of the valve cover 3200, the first float pilot valve 1100 is used to control the on-off of the main control hole 3213; a second chamber 3311 is formed between the auxiliary diaphragm 3310 and the auxiliary valve cover 3300; the auxiliary diaphragm 3310 is provided with a second through hole 3312, and the second through hole 3312 is used to connect the water inlet end 3111 of the medium channel 3110 and the second chamber 3311; the auxiliary valve cover 3300 is provided with an auxiliary control hole 3313 penetrating the auxiliary valve cover 3300, and the second float pilot valve 1200 is used to control the on-off of the auxiliary control hole 3313.

[0056] The liquid level control method of this embodiment is as follows:

[0057] The water tank 1000 is provided with a first set low water level, a first set high water level, a second set low water level and a second set high water level. The first float pilot valve 1100 floats between the first set low water level and the first set high water level. When the water level in the water tank 1000 drops to the first set low water level, the first float pilot valve 1100 opens. When the water level in the water tank 1000 rises to the first set high water level, the first float pilot valve 1100 closes. The second float pilot valve 1200 floats between the second set low water level and the second set high water level. When the water level in the water tank 1000 drops to the second set low water level, the second float pilot valve 1200 opens. When the water level in the water tank 1000 rises to the second set high water level, the second float pilot valve 1200 closes.

[0058] by Figure 3For example, when the second float pilot valve 1200 is opened, the auxiliary control hole 3313 is connected to the atmosphere, and the medium in the water inlet end 3111 of the medium channel 3110 enters the second chamber 3311 through the second through hole 3312 of the auxiliary diaphragm 3310. Then, since the second chamber 3311 is connected to the outside atmosphere through the auxiliary control hole 3313, the pressure in the second chamber 3311 is lower, and then the medium pressure in the water outlet end 3112 of the medium channel 3110 will be greater than the medium pressure in the second chamber 3311, thereby pushing the auxiliary valve plug 3320 to move upward, so that the water inlet end 3111 and the water outlet end 3112 of the medium channel 3110 are connected through the auxiliary water supply port 3130, and the water supply main pipe 2000 supplies water to the water tank 1000 at a small flow rate; when the second float pilot valve 1200 is closed, the auxiliary control hole 3313 is not connected to the atmosphere, and the second chamber 3311 is not connected to the atmosphere. It is only connected to the water inlet end 3111 of the medium channel 3110 through the second through hole 3312, and the medium in the water inlet end 3111 of the medium channel 3110 will enter the second chamber 3311 through the second through hole 3312 of the auxiliary diaphragm 3310, so that the pressure in the second chamber 3311 is balanced with the pressure at the water inlet end 3111; but since the pressure-bearing area of ​​the auxiliary diaphragm 3310 facing the auxiliary valve cover 3300 is the area of ​​the auxiliary diaphragm 3310, and the pressure-bearing area of ​​the auxiliary diaphragm 3310 facing away from the auxiliary valve cover 3300 is only the area of ​​the auxiliary water supply port 3130, the pressure-bearing area of ​​the auxiliary diaphragm 3310 facing the auxiliary valve cover 3300 is greater than the pressure-bearing area of ​​the auxiliary diaphragm 3310 facing away from the auxiliary valve cover 3300, so the auxiliary diaphragm 3310 will move downward, so that the auxiliary valve plug 3320 is sealed and connected with the auxiliary valve seat 3131 to close the auxiliary water supply port 3130.

[0059] by Figure 4For example, when the first float pilot valve 1100 is opened, the main control hole 3213 is connected to the atmosphere, and the medium in the water inlet end 3111 of the medium channel 3110 enters the first chamber 3211 through the first through hole 3212 of the main diaphragm 3210. Then, since the first chamber 3211 is connected to the outside atmosphere through the main control hole 3213, the pressure in the first chamber 3211 is relatively low. Then the medium pressure in the water outlet end 3112 of the medium channel 3110 will be greater than the medium pressure in the first chamber 3211, thereby pushing the main valve plug 3220 to move downward, so that the water inlet end 3111 and the water outlet end 3112 of the medium channel 3110 are connected through the main water supply port 3120, and the water supply main pipe 2000 supplies water to the water tank 1000 with a large flow rate; when the first float pilot valve 1100 is closed, the main control hole 3213 is not connected to the atmosphere, and the first chamber 3211 is not connected to the atmosphere. It is connected with the water inlet end 3111 of the medium channel 3110 only through the first through hole 3212, and the medium in the water inlet end 3111 of the medium channel 3110 will enter the first chamber 3211 through the first through hole 3212 of the main diaphragm 3210, so that the pressure in the first chamber 3211 is balanced with the pressure at the water inlet end 3111; but since the pressure-bearing area of ​​the main diaphragm 3210 facing the main valve cover 3200 is the area of ​​the main diaphragm 3210, and the pressure-bearing area of ​​the main diaphragm 3210 facing away from the main valve cover 3200 is only the area of ​​the main water supply port 3120, the pressure-bearing area of ​​the main diaphragm 3210 facing the main valve cover 3200 is greater than the pressure-bearing area of ​​the main diaphragm 3210 facing away from the main valve cover 3200, so the main diaphragm 3210 will move upward, so that the main valve plug 3220 is sealed and connected with the main valve seat 3121 to close the main water supply port 3120.

[0060] As can be seen from the above, the first float pilot valve 1100 is arranged below the second float pilot valve 1200; it should be noted that the first set high water level is higher than the second set low water level, so when the liquid level in the water tank 1000 drops to the first set low water level, the liquid level control valve 3000 supplies water to the water tank 1000 through the main water supply port 3120 and the auxiliary water supply port 3130 at the same time. However, it is conceivable that when the first float pilot valve 1100 is opened, the auxiliary control pipe 1400 is closed, and the liquid level control valve 3000 is prevented from supplying water to the water tank 1000 through the main water supply port 3120 and the auxiliary water supply port 3130 at the same time.

[0061] In the embodiment of the present invention, the auxiliary valve cover 3300 is provided with a mounting hole 3301 and a guide groove 3302, the mounting hole 3301 passes through the auxiliary valve cover 3300, and the adjustment rod 3410 is slidably penetrated in the mounting hole 3301; the guide groove 3302 is provided on the side wall of the mounting hole 3301 and communicated with the mounting hole 3301; the adjustment assembly 3400 includes a guide pin 3420, the guide pin 3420 is radially penetrated in the middle of the adjustment rod 3410, and the guide pin 3420 is installed in the guide groove 3302; the adjustment rod 3410 moves along its axial direction, which can drive the guide pin 3420 to slide along the guide groove 3302. Specifically, refer to Figure 3 As shown, the guide pin 3420 and the guide groove 3302 can limit the adjustment rod 3410 from rotating around its own axis, thereby ensuring that the adjustment rod 3410 can only slide along its own axis.

[0062] In an embodiment of the present invention, the adjusting assembly 3400 also includes a pressure cover 3430 and an adjusting nut 3440. The adjusting nut 3440 is rotatably installed on the auxiliary valve cover 3300 around its own axis, and the adjusting nut 3440 is threadedly connected to the top of the adjusting rod 3410; the pressure cover 3430 is connected to the auxiliary valve cover 3300, and is used to limit the movement of the adjusting nut 3440 along the axial direction of the adjusting rod 3410; the rotation of the adjusting nut 3440 around its own axis can drive the adjusting rod 3410 to slide along its axial direction. Specifically, the adjustment component 3400 also includes an electric adjustment structure 3450, which is used to drive the adjustment nut 3440 to rotate around its own axis, thereby controlling the distance between the bottom end of the adjustment rod 3410 and the auxiliary diaphragm 3310, thereby controlling the maximum opening of the auxiliary water supply port 3130. By controlling the maximum opening of the auxiliary water supply port 3130, the unit water supply volume during low-flow water supply is controlled. In the liquid level control system of this embodiment, it is preferred that the auxiliary water supply port 3130 is always in an open state.

[0063] In the embodiment of the present invention, the length of the guide groove 3302 limits the distance that the adjustment rod 3410 slides along its own axis direction. Figure 3 For example, when the guide pin 3420 abuts against the top of the guide groove 3302, the distance between the bottom end of the regulating rod 3410 and the auxiliary diaphragm 3310 is the largest, and the unit water supply of the liquid level control valve 3000 through the auxiliary water supply port 3130 is the largest; when the guide pin 3420 abuts against the bottom end of the guide groove 3302, the distance between the bottom end of the regulating rod 3410 and the auxiliary diaphragm 3310 is the smallest, and the unit water supply of the liquid level control valve 3000 through the auxiliary water supply port 3130 is the smallest. It should be noted that when the guide pin 3420 abuts against the bottom end of the guide groove 3302, the distance between the bottom end of the regulating rod 3410 and the auxiliary diaphragm 3310 is the smallest, but it cannot be zero.

[0064] In the embodiment of the present invention, a sealing ring is installed between the outer peripheral wall of the adjusting rod 3410 and the inner side wall of the mounting hole 3301, and the sealing ring is arranged below the guide groove 3302. The sealing ring is arranged to prevent the medium in the medium channel 3110 from flowing out through the gap between the outer peripheral wall of the adjusting rod 3410 and the inner side wall of the mounting hole 3301. Preferably, a sealing groove for installing the sealing ring is arranged on the inner side wall of the mounting hole 3301. The sealing ring can be selected from O-rings and the like.

[0065] In the embodiments of the present invention, referring to Figure 4 As shown, the main diaphragm 3210 is also equipped with a main pressure plate 3230, and the main pressure plate 3230 and the main valve plug 3220 are respectively installed on the opposite sides of the main diaphragm 3210, and the main pressure plate 3230 and the main valve plug 3220 are connected by fasteners penetrating the main diaphragm 3210; refer to Figure 3 As shown, the auxiliary diaphragm 3310 is also equipped with an auxiliary pressure plate 3330. The auxiliary pressure plate 3330 and the auxiliary valve plug 3320 are respectively installed on the opposite sides of the auxiliary diaphragm 3310. The auxiliary pressure plate 3330 and the auxiliary valve plug 3320 are connected by fasteners that penetrate the auxiliary diaphragm 3310; the fasteners can be structures such as bolts. A main spring 3240 is installed in the first chamber 3211. The main spring 3240 is installed on the main valve cover 3200 and extends toward the main diaphragm 3210; and / or, an auxiliary spring 3340 is installed in the second chamber 3311. The auxiliary spring 3340 is installed on the auxiliary valve cover 3300 and extends toward the auxiliary diaphragm 3310. Specifically, refer to Figure 3 As shown, the auxiliary spring 3340 is preferably arranged with both ends respectively abutting against the auxiliary valve cover 3300 and the auxiliary pressure plate 3330. Alternatively, the auxiliary spring 3340 may be arranged in a natural state with a certain distance between the bottom end of the auxiliary spring 3340 and the auxiliary pressure plate 3330. The auxiliary spring 3340 is arranged to prevent the auxiliary diaphragm 3310 from excessive elastic deformation, so as to extend the service life of the auxiliary diaphragm 3310. Figure 4 As shown, the bottom end of the main spring 3240 is connected to the main valve cover 3200, and the top of the main spring 3240 is connected to a plate 3241. When the main spring 3240 is in a natural state, there is a certain distance between the plate 3241 and the main spring 3240, thereby preventing the opening pressure of the main water supply port 3120 from being too high. The main valve cover 3200 is equipped with a limit block 3201, and the plate 3241 can be abutted against the limit block 3201 to limit the end of the stroke of the main spring 3240. The limit block 3201 and the plate 3241 can prevent the main diaphragm 3210 and the main spring 3240 from being deformed too much, thereby protecting the main diaphragm 3210 and the main spring 3240.

[0066] It can be imagined that the provision of the main pressure plate 3230 and the auxiliary pressure plate 3330 can also play a protective role on the main diaphragm 3210 and the auxiliary diaphragm 3310, so that the abutment plate 3241 is in contact with the main pressure plate 3230 instead of directly contacting the main diaphragm 3210, and the auxiliary spring 3340 is also in contact with the auxiliary pressure plate 3330 instead of directly contacting the auxiliary diaphragm 3310, thereby extending the service life of the main diaphragm 3210 and the auxiliary diaphragm 3310.

[0067] In the embodiment of the present invention, the first float pilot valve 1100 is connected to the main control hole 3213 through the main control pipe 1300, and the first water flow sensor 1310 is installed on the main control pipe 1300; the second float pilot valve 1200 is connected to the secondary control hole 3313 through the secondary control pipe 1400, and the second water flow sensor 1410 and the electric valve 1420 are installed on the secondary control pipe 1400. The electric valve 1420 can control the on and off of the secondary control pipe 1400, and the electric valve 1420 is preferably always in a normally open state. When it is necessary to avoid the liquid level control valve 3000 from supplying water to the water tank 1000 through the main water supply port 3120 and the secondary water supply port 3130 at the same time, it can be set that when the first float pilot valve 1100 is opened, the electric valve 1420 is closed to cut off the secondary control pipe 1400.

[0068] In the embodiment of the present invention, the first float pilot valve 1100 is closed once, the first water flow sensor 1310 sends a first action signal once, the second float pilot valve 1200 is closed once, the second water flow sensor 1410 sends a second action signal once, and the electric adjustment structure 3450 is actuated according to the first action signal or the second action signal to drive the adjustment rod 3410 to slide along its axial direction. Specifically, the electric adjustment structure 3450 drives the adjustment rod 3410 to slide a first distance along its axial direction in a direction away from the auxiliary valve plug 3320 according to the first action signal, and the electric adjustment structure 3450 drives the adjustment rod 3410 to slide a second distance along its axial direction in a direction close to the auxiliary valve plug 3320 according to the second action signal; wherein the first distance is N 1 times the preset unit distance, the second distance is N 2 times the preset unit distance, N 1 、N 2 For example, if the preset unit distance is 1mm, then the first distance can be 1mm, 2mm, 3mm, etc., and the second distance can also be 1mm, 2mm, 3mm, etc. The specific N 1 、N 2 The value can be selected according to actual needs.

[0069] In the embodiment of the present invention, the electric valve 1420 has an open state and a closed state. The electric valve 1420 is in the open state when it is not actuated. Before the electric regulating structure 3450 is actuated, a first regulating signal is sent to the electric valve 1420 to switch the electric valve 1420 from the open state to the closed state; after the electric regulating structure 3450 is actuated, a second regulating signal is sent to the electric valve 1420 to switch the electric valve 1420 from the closed state to the open state; when the electric valve 1420 is in the closed state, the auxiliary control pipe 1400 is cut off, so that the auxiliary control hole 3313 is closed; when the electric regulating structure 3450 is actuated, the auxiliary control pipe 1400 is cut off, so that the auxiliary control hole 3313 is closed. The auxiliary control hole 3313 is closed before operation in order to balance the pressure in the second chamber 3311 with the pressure at the water inlet end 3111 of the medium channel 3110. At this time, the auxiliary diaphragm 3310 will move toward the auxiliary valve seat 3131, so that the auxiliary valve plug 3320 is sealed and connected with the auxiliary valve seat 3131. Therefore, the sliding of the adjusting rod 3410 along its own axial direction will not be affected by the auxiliary diaphragm 3310, thereby greatly reducing the resistance of the adjusting rod 3410 to slide along its own axial direction, making it easy to use a low-power electric adjusting structure 3450, such as an electric adjusting structure 3450 powered only by a battery.

[0070] In the embodiment of the present invention, it can be seen from the above that the length of the guide groove 3302 limits the distance that the adjustment rod 3410 slides along its own axis direction. Therefore, the length of the guide groove 3302 is used as the reference length, and the reference length is evenly divided into a plurality of preset segments, and the length of each preset segment is equal to the preset unit distance. Figure 3 For example, when the guide pin 3420 abuts against the bottom end of the guide groove 3302, the distance between the bottom end of the adjusting rod 3410 and the auxiliary diaphragm 3310 is the smallest, and preferably, the minimum distance between the bottom end of the adjusting rod 3410 and the auxiliary diaphragm 3310 is a preset unit distance; the specific number of preset segments can be determined according to actual conditions, for example, the number of preset segments can be set to 10 to 30, or the preset unit distance can be directly set in the system, and then the system calculates the angle that the electric adjustment structure 3450 needs to rotate to drive the adjusting nut 3440 according to the preset unit distance.

[0071] In an embodiment of the present invention, within a unit time period, the first action signal accumulates to a first set number of times, the electric adjustment structure 3450 drives the adjustment rod 3410 to slide a first distance in a direction away from the main valve seat 3121, and the second action signal accumulates to a second set number of times, the electric adjustment structure 3450 drives the adjustment rod 3410 to slide a second distance in a direction close to the main valve seat 3121; within a set time period, the adjustment rod 3410 can only slide the first distance once; after the adjustment rod 3410 slides the first distance once, the number of second action signals is accumulated again. Specifically, the first set number of times and the second set number of times can be set according to actual conditions. Generally speaking, the first set number of times is closely related to the capacity of the water tank 1000, the maximum daily water consumption and the average daily water consumption; the value of the first set number of times is preferably less than the value of the second set number of times, and preferably the first set number of times is once, and the unit time period is preferably half a day or a day. If the number of the first action signal does not reach the first set number within the unit time period, the number of the first action signal is accumulated again. Similarly, if the number of the second action signal does not reach the second set number within the unit time period, the number of the second action signal is accumulated again.

[0072] It can be imagined that the best effect that can be achieved by the liquid level control system in this embodiment is: there is no need to supply water at a large flow rate through the main water supply port 3120, and only the auxiliary water supply port 3130 can continuously supply water at a small flow rate to meet the daily water demand. Therefore, if the second action signal reaches the second set number of times within the unit time period, it means that the amount of water added to the water tank 1000 through the auxiliary water supply port 3130 alone is still greater than the daily water demand, then the water added to the water tank 1000 through the auxiliary water supply port 3130 can be reduced by appropriately reducing the distance between the bottom end of the adjusting rod 3410 and the auxiliary diaphragm 3310. amount, thereby making the amount of water supplied at a small flow rate balanced with the daily water demand; on the contrary, if the water level in the water tank 1000 continues to drop within a unit time period and drops below the first set low water level, water needs to be supplied to the water tank 1000 through the main water supply port 3120, which means that the amount of water replenished into the water tank 1000 through the auxiliary water supply port 3130 alone is less than the daily water demand, then the amount of water replenished into the water tank 1000 through the auxiliary water supply port 3130 can be increased by appropriately increasing the distance between the bottom end of the adjusting rod 3410 and the auxiliary diaphragm 3310, thereby making the amount of water supplied at a small flow rate balanced with the daily water demand.

[0073] Furthermore, if there is a peak water consumption period within a unit time period, the water level in the water tank 1000 may drop below the first set low water level multiple times. If the number of times the adjustment rod 3410 can slide the first distance within a unit time period is not limited, the adjustment rod 3410 may slide the first distance multiple times during the peak water consumption period. Therefore, it is preferred to set the unit time period to half a day or a day, and then set the adjustment rod 3410 to slide the first distance only once within the unit time period. After the adjustment rod 3410 slides the first distance once, it needs to continue to run for a period of time to know whether the amount of small flow water supply can be balanced with the daily water demand, so the number of second action signals is accumulated again to obtain more accurate feedback.

[0074] In the embodiment of the present invention, a small DC generator 1430 is also installed on the auxiliary control pipe 1400. The small DC generator 1430 can generate electricity through the liquid flowing through the auxiliary control pipe 1400, and then supply power to the electric adjustment structure 3450 or the electric valve 1420. Since the second float pilot valve 1200 is in an open state most of the time, part of the medium in the medium channel 3110 will continue to enter the auxiliary control pipe 1400 through the second through hole 3312 and the auxiliary control hole 3313, and then flow out through the second float pilot valve 1200, so the medium flowing in the auxiliary control pipe 1400 can be used to generate electricity. The liquid level control method of the embodiment of the present invention mainly uses the auxiliary water supply port 3130 to supply water to the water tank 1000, so the operation noise is low, and the frequent actions of the main valve plug 3220 and the auxiliary valve plug 3320 can be effectively avoided, thereby extending the service life of the liquid level control system, reducing the impact on the pressure of the upstream pipe network, and reducing the risk of damage to the upstream pipeline.

[0075] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0076] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A liquid level control system, characterized in that: include: A water tank is provided with a first float pilot valve and a second float pilot valve, wherein the first float pilot valve is arranged below the second float pilot valve; A water supply main pipe, used for supplying water to the water tank; A liquid level control valve is installed on the water supply main pipe and is used to control the on-off of the water supply main pipe; the liquid level control valve comprises a valve body, a main valve cover, an auxiliary valve cover, a main diaphragm and an auxiliary diaphragm, and the main valve cover and the auxiliary valve cover are both installed on the valve body; the valve body has a medium channel, and the medium channel has a water inlet end and a water outlet end; the valve body is provided with a main water supply port and an auxiliary water supply port, and the main water supply port and the auxiliary water supply port are both arranged in the medium channel, and the water inlet end and the water outlet end are connected through the main water supply port and / or the auxiliary water supply port; a main valve seat is provided at the main water supply port, and an auxiliary valve seat is provided at the auxiliary water supply port, the main valve cover corresponds to the main valve seat, and the auxiliary valve cover corresponds to the auxiliary valve seat; the main diaphragm is movably installed between the main valve cover and the main valve seat, and the auxiliary diaphragm is movably installed between the auxiliary valve cover and the auxiliary valve seat; The main diaphragm is equipped with a main valve plug, which can be sealed and connected with the main valve seat to close the main water supply port; a first chamber is formed between the main diaphragm and the main valve cover; the main diaphragm is provided with a first through hole, and the first through hole is used to connect the water inlet end of the medium channel and the first chamber; the main valve cover is provided with a main control hole that penetrates the main valve cover, and the first float pilot valve is connected to the main control hole; The auxiliary diaphragm is equipped with an auxiliary valve plug, which can be sealed and connected with the auxiliary valve seat to close the auxiliary water supply port; a second chamber is formed between the auxiliary diaphragm and the auxiliary valve cover; the auxiliary diaphragm is provided with a second through hole, and the second through hole is used to connect the water inlet end of the medium channel and the second chamber; the auxiliary valve cover is provided with an auxiliary control hole penetrating the auxiliary valve cover, and the second float pilot valve is connected to the auxiliary control hole; The regulating assembly comprises a regulating rod, the middle part of which is slidably arranged in the auxiliary valve cover, and the bottom end of which extends into the second chamber; the regulating rod is used to limit the stroke end position of the auxiliary valve plug.

2. The liquid level control system according to claim 1, characterized in that: The auxiliary valve cover is provided with a mounting hole and a guide groove, the mounting hole passes through the auxiliary valve cover, and the adjusting rod is slidably arranged in the mounting hole; the guide groove is arranged on the side wall of the mounting hole and communicates with the mounting hole; The adjusting assembly comprises a guide pin, which is radially arranged in the middle of the adjusting rod and installed in the guide groove; the adjusting rod moves along its axial direction and can drive the guide pin to slide along the guide groove.

3. The liquid level control system according to claim 1, characterized in that: The adjusting assembly also includes a pressure cap and an adjusting nut. The adjusting nut is rotatably mounted on the auxiliary valve cover around its own axis, and the adjusting nut is threadedly connected to the top of the adjusting rod. The pressure cap is connected to the auxiliary valve cover to limit the movement of the adjusting nut along the axial direction of the adjusting rod. The rotation of the adjusting nut around its own axis can drive the adjusting rod to slide along its axial direction.

4. The liquid level control system according to claim 3, characterized in that: The adjustment assembly also includes an electric adjustment structure, and the electric adjustment structure is used to drive the adjustment nut to rotate around its own axis.

5. The liquid level control system according to claim 1, characterized in that: The first float pilot valve is connected to the main control hole through a main control pipe, and a first water flow sensor is installed on the main control pipe; The second float pilot valve is connected to the auxiliary control hole through an auxiliary control pipe, and a second water flow sensor is installed on the auxiliary control pipe.

6. The liquid level control system according to claim 5, characterized in that: The auxiliary control pipe is also equipped with an electric valve for controlling its on and off.

7. A liquid level control method, characterized in that: Applicable to the liquid level control system according to any one of claims 1 to 6; the control method is as follows: When the water level in the water tank drops to a second set low water level, the second float pilot valve opens, the auxiliary control hole is connected to the atmosphere, the auxiliary water supply port is opened, and the water supply main pipe supplies water at a small flow rate into the water tank; when the water level in the water tank rises to a second set high water level, the second float pilot valve closes, the auxiliary control hole is closed, the auxiliary valve plug is sealed and connected to the auxiliary valve seat to close the auxiliary water supply port, and the second water flow sensor sends a second action signal; When the water level in the water tank drops to a first set low water level, the first float pilot valve opens, the main control hole is connected to the atmosphere, the main water supply port is opened, and the water supply main pipe supplies water to the water tank at a large flow rate; when the water level in the water tank rises to a first set high water level, the first float pilot valve closes, the main control hole is closed, the main valve plug is sealed and connected to the main valve seat to close the main water supply port, and the first water flow sensor sends a first action signal; The electric adjustment structure is actuated according to the first action signal or the second action signal to drive the adjustment rod to slide along its axial direction; The electric valve has an open state and a closed state. The electric valve is in the open state when it is not in motion. Before the electric regulating structure is in motion, a first regulating signal is sent to the electric valve to switch the electric valve from the open state to the closed state; after the electric regulating structure is in motion, a second regulating signal is sent to the electric valve to switch the electric valve from the closed state to the open state. When the electric valve is in a closed state, the auxiliary control hole is closed.

8. The liquid level control method according to claim 7, characterized in that: The electric adjustment structure drives the adjustment rod to slide a first distance along its axial direction away from the auxiliary valve plug according to the first action signal, and the electric adjustment structure drives the adjustment rod to slide a second distance along its axial direction toward the auxiliary valve plug according to the second action signal; wherein the first distance is N1 times the preset unit distance, and the second distance is N2 times the preset unit distance, and N1 and N2 are both positive integers.

9. The liquid level control method according to claim 8, characterized in that: The length of the guide groove is taken as a reference length, and the reference length is evenly divided into a plurality of preset segments, and the length of each preset segment is equal to the preset unit distance.

10. The liquid level control method according to claim 8, characterized in that: Within a unit time period, the first action signal accumulates to a first set number of times, and the electric adjustment structure drives the adjustment rod to slide the first distance in a direction away from the auxiliary valve plug; When the second action signal accumulates to a second set number of times, the electric adjustment structure drives the adjustment rod to slide the second distance toward the auxiliary valve plug; In a unit time period, the adjusting rod can only slide the first distance once; after the adjusting rod slides the first distance once, the number of the second action signals is accumulated again.

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