Double-opening double-position flow-adjustable liquid level control device and liquid level control system

Abstract

The utility model discloses a double-opening double-position flow-adjustable liquid level control device and a liquid level control system, the double-opening double-position flow-adjustable liquid level control device comprises a valve body which is provided with a medium channel, 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; a main valve seat is arranged at the main water supply port, and an auxiliary valve seat is arranged at the auxiliary water supply port; the valve body is provided with a main valve cover and an auxiliary valve cover; the main diaphragm is provided with a main valve plug, and the main valve plug can be connected with the main valve seat in a sealed mode to seal the main water supply port; the pressure change of a first cavity formed between the main diaphragm and the main valve cover can drive the valve plug to move relative to the main valve seat; the auxiliary diaphragm is provided with an auxiliary valve plug, and the pressure change of a second cavity formed between the auxiliary diaphragm and the auxiliary valve cover can drive the auxiliary valve plug to move relative to the auxiliary valve seat; the adjusting assembly is used for limiting the stroke end point of the auxiliary valve plug. According to the double-opening double-position flow-adjustable liquid level control device, the opening and closing frequency can be reduced, and the service life can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water supply equipment, in particular to a double-opening and double-position flow adjustable liquid level control device. Background Art

[0002] The hydraulic float valve is an important automatic water replenishing device for current water tanks or cisterns. The valve adopts a combination form of a main valve and a float pilot valve. The float pilot valve is installed in the water tank and automatically opens and closes according to the water level change, so as to control the opening and closing of the main valve and dynamically replenish water to the water tank. Currently, the float pilot valve is installed at a high water level position slightly lower than the overflow port in the water tank. Once the water level in the tank drops slightly, the main valve will be fully opened by the opening of the pilot valve to replenish water into the tank, which will cause the following problems:

[0003] First, the water replenishing speed of the main valve is fast. The opening of the main valve will cause the liquid level in the water tank to rise rapidly, resulting in a long-term high water level state in the water tank and low water flow circulation and renewal degree;

[0004] Second, the main valve starts and stops frequently, which will cause the floating ball floating on the water surface to swing greatly and frequently, easily leading to damage to the float pilot valve or detachment of the floating ball, and further resulting in the failure of the main valve;

[0005] Third, the "large opening and closing" and "fast opening and closing" of the main valve will cause the pressure of the upstream water supply main pipe to be unstable. During the peak period, the water supply main pipe needs to grab water and pressure, and during the low period, the main pipe will generate water hammer when the valve is closed, increasing the risk of damage to the upstream pipeline. Content of the Utility Model

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a double-opening and double-position flow adjustable liquid level control device, which has a large-flow water replenishing mode and a small-flow water replenishing mode, effectively reduces the opening and closing times of the float pilot valve, avoids the frequent opening and closing of the main valve, thereby prolonging the service life of the main valve and the float pilot valve, and fully exerting the storage function of the water tank.

[0007] The utility model also provides a liquid level control system with the above double-opening and double-position flow adjustable liquid level control device.

[0008] According to the double-opening and double-position flow adjustable liquid level control device of the first aspect embodiment of the utility model, it includes:

[0009] The valve body has a medium channel with a water inlet end and a water outlet end. The valve body is provided with a main water supply port and a secondary water supply port, both of which are arranged in the medium channel. The water inlet end and the water outlet end are communicated through the main water supply port and / or the secondary water supply port. A main valve seat is provided at the main water supply port, and a secondary valve seat is provided at the secondary water supply port. The valve body is installed with a main valve cover and a secondary valve cover, the main valve cover corresponding to the main valve seat, and the secondary valve cover corresponding to the secondary valve seat.

[0010] The main diaphragm is movably installed between the main valve cover and the main valve seat. The main diaphragm is installed with a main valve plug, and the main valve plug can be hermetically connected to 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 pressure change in the first chamber can drive the main diaphragm to undergo elastic deformation, and then drive the main valve plug to move relative to the main valve seat.

[0011] The secondary diaphragm is movably installed between the secondary valve cover and the secondary valve seat. The secondary diaphragm is installed with a secondary valve plug, and the secondary valve plug can be hermetically connected to the secondary valve seat to close the secondary water supply port. A second chamber is formed between the secondary diaphragm and the secondary valve cover. The pressure change in the second chamber can drive the secondary diaphragm to undergo elastic deformation, and then drive the secondary valve plug to move relative to the secondary valve seat.

[0012] The adjusting assembly is installed on the secondary valve cover and partially extends into the first chamber. The adjusting assembly is used to limit the end position of the stroke of the secondary valve plug.

[0013] The double-opening and double-position flow-adjustable liquid level control device according to the embodiment of the present invention has at least the following beneficial effects:

[0014] By setting a main water supply port to supply water to the water tank in a large flow rate and a secondary water supply port to supply water to the water tank in a small flow rate, mainly using small-flow water supply to reduce large-flow water supply, the actions of the first float valve and the second float valve can be effectively reduced, thereby prolonging the service life of the equipment; the first float valve is automatically opened and closed by the water level in the water tank, and the automatic water replenishment of the water tank can be realized without additional power, which can greatly improve the applicable scenarios; mainly through small-flow water replenishment, the impact on the pressure of the upstream official website can be effectively reduced.

[0015] According to some embodiments of the present invention, the adjusting assembly includes an adjusting rod and a guide pin. The middle part of the adjusting rod is slidably penetrated through the secondary valve cover, and the bottom end of the adjusting rod extends into the first chamber. The guide pin is radially penetrated through the middle part of the adjusting rod.

[0016] The secondary valve cover is provided with a guide groove, and the guide pin is installed in the guide groove. When the adjusting rod moves along its axis direction, the guide pin can be driven to slide along the guide groove.

[0017] According to some embodiments of the present utility model, the auxiliary valve cover is provided with a mounting hole penetrating through the auxiliary valve cover, and the adjusting rod is slidably inserted through the mounting hole; the guiding groove is arranged on the side wall of the mounting hole and communicates with the mounting hole.

[0018] According to some embodiments of the present utility model, a sealing ring is installed between the outer peripheral wall of the adjusting rod and the inner side wall of the mounting hole, and the sealing ring is arranged below the guiding groove.

[0019] According to some embodiments of the present utility model, the adjusting assembly further includes a gland and an adjusting nut. 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 gland is connected to the auxiliary valve cover and is used to limit the movement of the adjusting nut along the axis direction of the adjusting rod; the rotation of the adjusting nut around its own axis can drive the adjusting rod to slide along its axis direction.

[0020] According to some embodiments of the present utility model, a main pressing plate is further installed on the main diaphragm. The main pressing plate and the main valve plug are respectively installed on opposite sides of the main diaphragm, and the main pressing plate and the main valve plug are connected by a fastener penetrating through the main diaphragm;

[0021] The cross-sectional area of the main pressing plate is larger than the cross-sectional area of the main water supply port, and at least a part of the main valve plug is embedded in the main water supply port.

[0022] According to some embodiments of the present utility model, a main spring is installed in the first chamber. The main spring is installed on the main valve cover and extends towards the direction of the main diaphragm;

[0023] And / or, a sub-spring is installed in the second chamber. The sub-spring is installed on the auxiliary valve cover and extends towards the direction of the sub-diaphragm.

[0024] According to some embodiments of the present utility model, the first end of the main spring is connected to the main valve cover, and a pressing plate is installed at the second end of the main spring; a limiting block is installed on the main valve cover, and the pressing plate can abut against the limiting block to limit the end point of the stroke of the main spring.

[0025] According to some embodiments of the present utility model, the main diaphragm is provided with a first through hole, and the first through hole is used to communicate the water inlet end of the medium channel and the first chamber; the main valve cover is provided with a main control hole penetrating through the main valve cover, and a first float-guided valve for controlling its on-off is installed in the main control hole.

[0026] The auxiliary diaphragm is provided with a second through hole for communicating the water inlet end of the medium channel and the second chamber; the auxiliary valve cover is provided with an auxiliary control hole penetrating through the auxiliary valve cover, and a second float pilot valve for controlling its on-off is installed in the auxiliary control hole.

[0027] A liquid level control system according to a second aspect embodiment of the present invention includes a water tank, a water supply main pipe, and the above-mentioned double-open double-position flow adjustable liquid level control device. The water supply main pipe is used to supply water into the water tank, and the double-open double-position flow adjustable liquid level control device is installed on the water supply main pipe;

[0028] Both the first float pilot valve and the second float pilot valve are installed in the water tank, and the first float pilot valve is arranged below the second float pilot valve.

[0029] Due to including the above-mentioned double-open double-position flow adjustable liquid level control device, the liquid level control system according to the embodiment of the present invention has at least all the beneficial effects of the double-open double-position flow adjustable liquid level control device.

[0030] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0031] The following further describes the present invention in conjunction with the drawings and embodiments, where:

[0032] Figure 1 is a schematic structural diagram of the first aspect embodiment of the present invention

[0033] Figure 2 is Figure 1 an enlarged view of part A in

[0034] Figure 3 is Figure 1 an enlarged view of part B in

[0035] Figure 4 is a schematic structural diagram of the second aspect embodiment of the present invention.

[0036] Reference Numerals in the Drawings:

[0037] Water tank 1000, overflow pipe 1010, water outlet pipe 1020, first float pilot valve 1100, second float pilot valve 1200, main control pipe 1300, auxiliary control pipe 1400;

[0038] Water supply main pipe 2000;

[0039] Liquid level control valve 3000, valve body 3100, medium channel 3110, water inlet end 3111, water outlet end 3112, main water supply port 3120, main valve seat 3121, secondary water supply port 3130, secondary 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, abutting plate 3241, secondary valve cover 3300, mounting hole 3301, guide groove 3302, secondary diaphragm 3310, second chamber 3311, second through hole 3312, secondary control hole 3313, secondary valve plug 3320, secondary pressure plate 3330, secondary spring 3340, adjustment assembly 3400, adjustment rod 3410, guide pin 3420, gland 3430, adjustment nut 3440, electric adjustment structure 3450. Detailed implementation mode

[0040] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up and down, etc. is based on the orientation or positional relationship shown in the drawings, and is 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 construed as a limitation to the present invention.

[0042] In the description of the present invention, "a plurality of" refers to more than two. If the first and the second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0043] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0044] Refer to Figures 1 to 3, the double-opening and double-position flow-adjustable liquid level control device according to the first aspect embodiment of the present utility model includes a valve body 3100, a main valve cover 3200, a sub-valve cover 3300, a main diaphragm 3210 and a sub-diaphragm 3310. The main valve cover 3200 and the sub-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 sub-diaphragm 3310 is movably installed between the sub-valve cover 3300 and the sub-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 sub-valve cover 3300 and the valve body 3100 are connected by fasteners such as bolts, and the edge of the sub-diaphragm 3310 is pressed between the sub-valve cover 3300 and the valve body 3100. Taking Figure 1 as an example, the middle parts of the main diaphragm 3210 and the sub-diaphragm 3310 can both undergo elastic deformation in the vertical direction.

[0045] In the embodiment of the present utility model, referring to Figure 1As shown, 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 a secondary water supply port 3130. Both the main water supply port 3120 and the secondary water supply port 3130 are arranged in the medium channel 3110. The water inlet end 3111 and the water outlet end 3112 are communicated through the main water supply port 3120 and / or the secondary water supply port 3130; a main valve seat 3121 is provided at the main water supply port 3120, and a secondary valve seat 3131 is provided at the secondary water supply port 3130. The main valve cover 3200 corresponds to the main valve seat 3121, and the secondary valve cover 3300 corresponds to the secondary valve seat 3131. A main valve plug 3220 is installed on the main diaphragm 3210, and the main valve plug 3220 can be hermetically connected to the main valve seat 3121 to close the main water supply port 3120; a secondary valve plug 3320 is installed on the secondary diaphragm 3310, and the secondary valve plug 3320 can be hermetically connected to the secondary valve seat 3131 to close the secondary 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, the medium at the water inlet end 3111 of the medium channel 3110 can also enter the water outlet end 3112 through the secondary water supply port 3130, or the medium at the water inlet end 3111 of the medium channel 3110 enters the water outlet end 3112 through both the main water supply port 3120 and the secondary water supply port 3130 at the same time; the main water supply port 3120 is mainly used for supplying water to the water tank 1000 in a large flow rate, and the secondary water supply port 3130 is mainly used for supplying water to the water tank 1000 in a small flow rate. When the water level in the water tank 1000 is insufficient during the peak water use period, water can be supplied to the water tank 1000 in a large flow rate through the main water supply port 3120 to maintain the water level in the water tank 1000. During the low water use period, water can be continuously supplied to the water tank 1000 in a small flow rate through the secondary water supply port 3130, so as to reduce the operation of the double-open double-position flow adjustable liquid level control device while maintaining the liquid level in the water tank 1000, thereby reducing the disturbance to the upstream official website pressure and prolonging the service life of the equipment.

[0046] In an embodiment of the present invention, as shown in Figure 1 、 Figure 2 The double-open double-position flow adjustable liquid level control device is further installed with an adjustment assembly 3400. The adjustment assembly 3400 includes an adjustment rod 3410. The middle part of the adjustment rod 3410 is slidably penetrated through the secondary valve cover 3300, and the bottom end of the adjustment rod 3410 extends into the second chamber 3311; the adjustment rod 3410 is used for limiting the stroke end of the secondary valve plug 3320. It should be understood that by limiting the stroke end of the secondary valve plug 3320 through the adjustment rod 3410, the distance that the secondary valve plug 3320 can move relative to the secondary valve seat 3131 is limited, that is, the secondary water supply port 3130 can only supply water in a small flow rate.

[0047] It can be imagined that preferably, the aperture of the main water supply port 3120 is larger than the aperture of the secondary water supply port 3130.

[0048] In an embodiment of the present utility model, the auxiliary valve cover 3300 is provided with an installation hole 3301 and a guide groove 3302. The installation hole 3301 penetrates through the auxiliary valve cover 3300, and the adjusting rod 3410 slidably passes through the installation hole 3301; the guide groove 3302 is arranged on the side wall of the installation hole 3301 and communicates with the installation hole 3301; the adjusting assembly 3400 includes a guide pin 3420. The guide pin 3420 is radially arranged in the middle of the adjusting rod 3410, and the guide pin 3420 is installed in the guide groove 3302; when the adjusting rod 3410 moves along its axial direction, the guide pin 3420 can be driven to slide along the guide groove 3302. Specifically, as shown in Figure 2 shown, setting the guide pin 3420 and the guide groove 3302 can limit the rotation of the adjusting rod 3410 around its own axis, thereby ensuring that the adjusting rod 3410 can only slide along its own axis.

[0049] In an embodiment of the present utility model, as shown in Figure 2 shown, the adjusting assembly 3400 further includes a gland 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 gland 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; when the adjusting nut 3440 rotates around its own axis, it can drive the adjusting rod 3410 to slide along its axial direction. Specifically, the adjusting assembly 3400 further includes an electric adjusting structure 3450. The electric adjusting structure 3450 is used to drive the adjusting nut 3440 to rotate around its own axis, thereby controlling the distance between the bottom end of the adjusting rod 3410 and the auxiliary diaphragm 3310, and thus controlling the maximum opening degree of the auxiliary water outlet. Controlling the maximum opening degree of the auxiliary water outlet also means controlling the unit water supply amount during small-flow water supply; in the liquid level control system of this embodiment, it is preferably that the auxiliary water outlet is always in an open state.

[0050] In an embodiment of the present utility model, the length of the guide groove 3302 limits the sliding distance of the adjusting rod 3410 along its own axis direction. Taking Figure 2 as an example, when the guide pin 3420 abuts against the top end of the guide groove 3302, the distance between the bottom end of the adjusting rod 3410 and the auxiliary diaphragm 3310 is the largest, and the unit water supply amount of the double-open double-position flow-adjustable liquid level control device through the auxiliary water outlet 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 adjusting rod 3410 and the auxiliary diaphragm 3310 is the smallest, and the unit water supply amount of the double-open double-position flow-adjustable liquid level control device through the auxiliary water outlet 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 adjusting rod 3410 and the auxiliary diaphragm 3310 is the smallest, but it cannot be zero.

[0051] In an embodiment of the present utility model, 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 guiding groove 3302. The sealing ring is provided 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 provided on the inner side wall of the mounting hole 3301.

[0052] Refer to Figure 4 As shown, the liquid level control system according to the second aspect embodiment of the present utility model includes a water tank 1000, a water supply main pipe 2000, and the above-mentioned double-open double-position flow adjustable liquid level control device. The water supply main pipe 2000 is used to supply water into the water tank 1000, and the double-open double-position flow adjustable liquid level control device is installed on the water supply main pipe 2000 to control the on-off of the water supply main pipe 2000. A first float-guided valve 1100 and a second float-guided valve 1200 are installed in the water tank 1000, and the first float-guided valve 1100 is arranged below the second float-guided valve 1200; the water tank 1000 is also connected with a water outlet pipe 1020 and an overflow pipe 1010. The water outlet pipe 1020 is arranged below the first float-guided valve 1100, and the overflow pipe 1010 is flush with the second float-guided valve 1200; the first float-guided valve 1100 is connected to the double-open double-position flow adjustable liquid level control device through a main control pipe 1300, and the second float-guided valve 1200 is connected to the double-open double-position flow adjustable liquid level control device through a sub-control pipe 1400. Specifically, the first float-guided valve 1100 and the second float-guided valve 1200 can adopt the float-guided valve in the patent with the application number CN202322004231.7 and the patent name "A Double Liquid Level Float Ball Valve with Adjustable Opening and Closing Liquid Level Difference".

[0053] In the embodiment of the present utility model, the double-opening double-position flow-adjustable liquid level control device of this embodiment mainly realizes the switching between large-flow water supply and small-flow water supply of the double-opening double-position flow-adjustable liquid level control device through the first float guide valve 1100 and the second float guide 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 communicate the water inlet end 3111 of the medium channel 3110 and the first chamber 3211; the main valve cover 3200 is provided with a main control hole 3213 penetrating through the main valve cover 3200, and the first float guide 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 communicate 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 through the auxiliary valve cover 3300, and the second float guide valve 1200 is used to control the on-off of the auxiliary control hole 3313.

[0054] The liquid level control method of this embodiment is as follows:

[0055] 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 guide 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 guide valve 1100 opens. When the water level in the water tank 1000 rises to the first set high water level, the first float guide valve 1100 closes; the second float guide 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 guide valve 1200 opens. When the water level in the water tank 1000 rises to the second set high water level, the second float guide valve 1200 closes.

[0056] With 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.

[0057] 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.

[0058] 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 double-open double-position flow adjustable liquid level control device 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 double-open double-position flow adjustable liquid level control device 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.

[0059] In the embodiments of the present invention, referring to Figure 3As shown in the figure, the main diaphragm 3210 is also installed with a main pressure plate 3230. The main pressure plate 3230 and the main valve plug 3220 are respectively installed on opposite sides of the main diaphragm 3210. The main pressure plate 3230 and the main valve plug 3220 are connected by fasteners passing through the main diaphragm 3210. The cross-sectional area of the main pressure plate 3230 is larger than the cross-sectional area of the main water supply port 3120, and at least a part of the main valve plug 3220 is embedded in the main water supply port 3120. Specifically, the fasteners are structures such as bolts. The fasteners pass through the main pressure plate 3230, the main diaphragm 3210, and the main valve plug 3220 to lock the three together. The main valve plug 3220 can be at least partially embedded in the main water supply port 3120, and the cross-sectional area of the main pressure plate 3230 is larger than the cross-sectional area of the main water supply port 3120. Therefore, when the first chamber 3211 is only connected to the water supply end of the medium channel 3110, it can be ensured that the force-bearing area on the side of the main diaphragm 3210 facing the main valve plug 3220 is larger than the force-bearing area on the side of the main diaphragm 3210 facing away from the main valve plug 3220, so that the main valve plug 3220 can be hermetically connected to the main valve seat 3121.

[0060] Correspondingly, referring to Figure 2 As shown in the figure, the auxiliary diaphragm 3310 is also installed with an auxiliary pressure plate 3330. The auxiliary pressure plate 3330 and the auxiliary valve plug 3320 are respectively installed on opposite sides of the auxiliary diaphragm 3310. The auxiliary pressure plate 3330 and the auxiliary valve plug 3320 are connected by fasteners passing through the auxiliary diaphragm 3310. The cross-sectional area of the auxiliary pressure plate 3330 is larger than the cross-sectional area of the auxiliary water supply port 3130, and at least a part of the auxiliary valve plug 3320 is embedded in the auxiliary water supply port 3130.

[0061] In an embodiment of the present invention, 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 in the direction of 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 in the direction of the auxiliary diaphragm 3310. Specifically, referring to Figure 2 As shown in the figure, the auxiliary spring 3340 is preferably abutted against the auxiliary valve cover 3300 and the auxiliary pressure plate 3330 at both ends respectively. It can also be that there is a certain distance between the bottom end of the auxiliary spring 3340 and the auxiliary pressure plate 3330 in the natural state of the auxiliary spring 3340. The auxiliary spring 3340 is provided to prevent the auxiliary diaphragm 3310 from undergoing excessive elastic deformation to extend the service life of the auxiliary diaphragm 3310. Referring to Figure 3As shown, the bottom end of the main spring 3240 is connected to the main valve cover 3200. A pressing plate 3241 is connected to the top of the main spring 3240. When the main spring 3240 is in its natural state, there is a certain distance between the pressing plate 3241 and the main spring 3240, thus preventing the opening pressure of the main water supply port 3120 from being too high. The main valve cover 3200 is provided with a limiting block 3201. The pressing plate 3241 can abut against the limiting block 3201 to limit the end position of the stroke of the main spring 3240. The provision of the limiting block 3201 and the pressing 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.

[0062] It can be conceived that the provision of the main pressing plate 3230 and the auxiliary pressing plate 3330 can also play a role in protecting the main diaphragm 3210 and the auxiliary diaphragm 3310, such that the pressing plate 3241 contacts the main pressing plate 3230 instead of directly contacting the main diaphragm 3210, and the auxiliary spring 3340 similarly contacts the auxiliary pressing 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.

[0063] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0064] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art to which it pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. A double-opening, double-position flow-adjustable liquid level control device, characterized in that: include: A valve body having a medium channel, wherein the medium channel has a water inlet and a water outlet; the valve body is provided with a main water supply port and an auxiliary water supply port, wherein the main water supply port and the auxiliary water supply port are both arranged in the medium channel, and the water inlet and the water outlet are communicated 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; a main valve cover and an auxiliary valve cover are installed on the valve body, wherein the main valve cover corresponds to the main valve seat, and the auxiliary valve cover corresponds to the auxiliary valve seat; A main diaphragm is movably installed between the main valve cover and the main valve seat; the main diaphragm is installed with a main valve plug, and the main valve plug 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, and the pressure change in the first chamber can drive the main diaphragm to undergo elastic deformation, thereby driving the main valve plug to move relative to the main valve seat; A secondary diaphragm is movably installed between the secondary valve cover and the secondary valve seat; the secondary diaphragm is installed with a secondary valve plug, and the secondary valve plug can be sealed and connected with the secondary valve seat to close the secondary water supply port; a second chamber is formed between the secondary diaphragm and the secondary valve cover, and the pressure change in the second chamber can drive the secondary diaphragm to undergo elastic deformation, thereby driving the secondary valve plug to move relative to the secondary valve seat; An adjusting component is installed on the auxiliary valve cover and partially extends into the first chamber; the adjusting component is used to limit the auxiliary valve plug at the end of its stroke.

2. The double-opening, double-position flow-adjustable liquid level control device according to claim 1 is characterized in that: The adjusting assembly comprises an adjusting rod and a guide pin, wherein the middle portion of the adjusting rod is slidably arranged in the auxiliary valve cover, and the bottom end of the adjusting rod extends into the first chamber; the guide pin is radially arranged in the middle portion of the adjusting rod; The auxiliary valve cover is provided with a guide groove, and the guide pin is installed in the guide groove; the adjustment rod moves along its axial direction, and can drive the guide pin to slide along the guide groove.

3. The double-opening, double-position flow-adjustable liquid level control device according to claim 2 is characterized in that: The auxiliary valve cover is provided with a mounting hole penetrating 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 communicated with the mounting hole.

4. The double-opening, double-position flow-adjustable liquid level control device according to claim 3 is characterized in that: A sealing ring is installed between the outer peripheral wall of the adjusting rod and the inner side wall of the mounting hole, and the sealing ring is arranged below the guide groove.

5. The double-opening, double-position flow-adjustable liquid level control device according to claim 2 is 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.

6. The double-opening, double-position flow-adjustable liquid level control device according to claim 1 is characterized in that: The main diaphragm is also equipped with a main pressure plate, and the main pressure plate and the main valve plug are respectively installed on two opposite sides of the main diaphragm, and the main pressure plate and the main valve plug are connected by a fastener penetrating the main diaphragm; The cross-sectional area of ​​the main pressure plate is larger than the cross-sectional area of ​​the main water supply port, and the main valve plug portion is at least embedded in the main water supply port.

7. The double-opening, double-position flow-adjustable liquid level control device according to claim 1 is characterized in that: A main spring is installed in the first chamber, the main spring is installed on the main valve cover and extends toward the main diaphragm; And / or, a secondary spring is installed in the second chamber, the secondary spring is installed on the secondary valve cover and extends toward the secondary diaphragm.

8. The double-opening, double-position flow-adjustable liquid level control device according to claim 7 is characterized in that: The first end of the main spring is connected to the main valve cover, and the second end of the main spring is installed with a stop plate; the main valve cover is installed with a limit block, and the stop plate can be abutted against the limit block to limit the end point of the stroke of the main spring.

9. The double-opening, double-position flow-adjustable liquid level control device according to claim 1, characterized in that: 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 penetrating the main valve cover, and the main control hole is installed with a first float pilot valve for controlling its on and off; 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 auxiliary control hole is installed with a second float guide valve for controlling its on and off.

10. A liquid level control system, characterized in that: It comprises a water tank, a water supply main pipe and a double-opening double-position flow adjustable liquid level control device as claimed in any one of claims 1 to 9, wherein the water supply main pipe is used to supply water to the water tank, and the double-opening double-position flow adjustable liquid level control device is installed on the water supply main pipe; The first float pilot valve and the second float pilot valve are both installed in the water tank, and the first float pilot valve is arranged below the second float pilot valve.

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