A liquid level control system

Abstract

The utility model discloses a liquid level height control system, including storage component, main valve and height pilot valve, the main valve includes main valve body and main valve diaphragm, and the main valve diaphragm will be main valve body cavity and divide into first pressure sensing cavity and first fluid cavity, the height pilot valve includes pilot valve body and regulating valve stem module, and the regulating valve stem module will be pilot valve body cavity and divide into second pressure sensing cavity and second fluid cavity, and the second pressure sensing cavity is linked together with storage component, the pilot valve valve flap for opening and closing pilot valve fluid passage is movably arranged in the second fluid cavity, is equipped with the return spring on the pilot valve valve flap, wherein the regulating valve stem module can push pilot valve valve flap and compress return spring, and open pilot valve fluid passage, through height pilot valve control main valve's opening and closing, have solved the problem that the ball valve performance is unstable, and appears the problem that the sealing is not tight, avoid appearing because medium from storage component overflow, cause economic loss, pollute the environment and other problems.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a liquid level control system. Background Technology

[0002] In everyday water towers, water tanks, and other media storage equipment, as well as in large-scale water conservancy projects such as reservoirs, it is often necessary to control the water level. Usually, a float valve is installed at the outlet, and the float is used to open and close the valve to achieve the purpose of water level control.

[0003] However, using a float ball to control the opening and closing of a float valve often results in problems because the float ball cannot achieve a complete seal, or the sealing performance cannot be fully guaranteed due to structural limitations. Alternatively, after prolonged use, the float valve may not be able to fit tightly with the outlet, leading to media overflow, causing economic losses, environmental pollution, and safety hazards. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a liquid level height control system.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A liquid level control system includes a storage component, a main valve, and a height pilot valve for controlling the switching of the main valve.

[0007] The main valve includes a main valve body and a main valve diaphragm connected to a main valve disc assembly. The main valve diaphragm divides the cavity of the main valve body into an upper first pressure-sensing cavity and a lower first fluid cavity. The first water inlet at one end of the first fluid cavity is connected to a water inlet pipe, and the first water outlet at the other end is connected to a storage component.

[0008] The height pilot valve includes a pilot valve body and an adjusting valve stem module. The adjusting valve stem module divides the pilot valve body cavity into an upper second pressure-sensing cavity and a lower second fluid cavity. The second pressure-sensing cavity is connected to a storage component. The second water inlet at one end of the second fluid cavity is connected to a water inlet pipe, and the second water outlet at the other end is connected to the opening of the first pressure-sensing cavity.

[0009] The second fluid cavity is movably provided with a pilot valve disc for opening and closing the pilot valve fluid passage. The pilot valve disc is provided with a return spring. The regulating valve stem module can push the pilot valve disc to compress the return spring and open the pilot valve fluid passage.

[0010] The present invention further comprises: the regulating valve stem module including a guide valve diaphragm disposed in the second sensing cavity and a guide valve stem connected to the guide valve diaphragm;

[0011] The lower end of the pilot valve stem extends into the second fluid cavity to cooperate with the pilot valve disc, and its upper end protrudes out of the pilot valve body and is threaded with an adjusting nut.

[0012] An adjusting spring is fitted on the upper end of the pilot valve stem. One end of the adjusting spring abuts against the adjusting nut, and the other end abuts against the pilot valve body.

[0013] The present invention is further provided that: the lower end of the pilot valve diaphragm is connected to a diaphragm lower pressure plate, and the upper end is connected to a diaphragm upper pressure plate.

[0014] The present invention further includes: a balance spring is sleeved at the lower end of the pilot valve stem, the lower end of the balance spring abuts against the pilot valve body, and the upper end abuts against the pilot valve stem, thereby driving the pilot valve stem to move upward.

[0015] The present invention further includes a discharge hole in the middle of the valve disc of the pilot valve, which is adapted to the lower end of the valve stem of the pilot valve.

[0016] The present invention further comprises: the main valve disc assembly including a main valve disc, a main valve stem, and a compression spring connected to the main valve diaphragm; the upper end of the compression spring abuts against the main valve stem, and the lower end abuts against the main valve diaphragm.

[0017] The beneficial effects of this utility model are as follows: The liquid level control system includes a storage component, a main valve, and a height pilot valve for controlling the switching of the main valve. When the water level in the storage component reaches a preset level, the hydraulic pressure regulating valve rod module in the second pressure-sensing cavity pushes the lower end of the regulating valve rod module downward to push the pilot valve disc and compress the return spring. The pilot valve disc separates from the connecting hole of the pilot valve body, opening the pilot valve fluid channel. This allows the liquid in the inlet pipe to flow into the first pressure-sensing cavity through the pilot valve fluid channel in the second fluid cavity to increase its pressure. At this time, the hydraulic pressure main valve disc assembly in the first pressure-sensing cavity gradually moves downward and seals the connecting hole of the first fluid cavity until the main valve fluid channel in the first fluid cavity is closed, thus achieving automatic closure of the main valve and stopping the injection of liquid into the storage component.

[0018] When the water level in the storage component is lower than the preset level, the hydraulic pressure in the second pressure-sensing cavity is less than the elastic force of the adjusting spring and the balance spring. The adjusting valve stem module moves upward, causing its lower end to separate from the pilot valve disc. Under the elastic force of the return spring, the pilot valve disc moves upward and engages with the connecting hole of the pilot valve body, closing the pilot valve fluid channel and preventing liquid from flowing into the first pressure-sensing cavity. This allows the main valve disc assembly to move upward under the action of the compression spring, releasing the seal on the connecting hole of the first fluid cavity, opening the main valve fluid channel in the first fluid cavity, and realizing the automatic opening of the main valve to re-inject liquid into the storage component. This solves the problem of unstable performance and poor sealing of the float valve, and avoids economic losses and environmental pollution caused by the medium overflowing from the storage component.

[0019] This invention controls the opening and closing of the main valve through a height pilot valve, which is controlled by the water level of the storage component. This solves the problem of high-precision remote water tower reservoir level control for reservoirs and mountainous urban water pipe networks with large road differences between the ground and the hillside. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a liquid level control system according to the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the structure of a liquid level control system according to the present invention. Figure 2 ;

[0022] Figure 3 This is a diagram showing the main valve in the closed state of a liquid level control system according to this utility model.

[0023] Figure 4 This is a diagram showing the main valve opening state of a liquid level control system according to this utility model.

[0024] Figure 5 This is a diagram showing the opening state of the height guide valve in a liquid level control system according to this utility model.

[0025] Figure 6 This is a diagram showing the closed state of the height guide valve in a liquid level control system according to this utility model.

[0026] Explanation of reference numerals in the attached drawings: 1. Storage component; 2. Main valve; 21. Main valve body; 211. First pressure-sensing cavity; 212. First fluid cavity; 22. Main valve disc assembly; 221. Main valve disc; 222. Main valve stem; 223. Compression spring; 23. Main valve diaphragm; 3. Height pilot valve; 31. Pilot valve body; 311. Second pressure-sensing cavity; 312. Second fluid cavity; 32. Pilot valve disc; 321. Return spring; 322. Discharge port; 33. Adjusting valve stem module; 331. Pilot valve diaphragm; 332. Pilot valve stem; 3321. Adjusting nut; 3322. Adjusting spring; 333. Lower diaphragm pressure plate; 334. Upper diaphragm pressure plate. Detailed Implementation

[0027] See attached document Figures 1 to 6 The present invention provides a further detailed description of a liquid level control system.

[0028] A liquid level control system includes a storage component 1, a main valve 2, and a height pilot valve 3 for controlling the opening and closing of the main valve 2. The main valve 2 includes a main valve body 21 and a diaphragm connected to a main valve disc assembly 22. The diaphragm divides the cavity of the main valve body 21 into an upper first pressure-sensing cavity 211 and a lower first fluid cavity 212. A first inlet at one end of the first fluid cavity 212 is connected to an inlet pipe, and a first outlet at the other end is connected to the storage component 1. The height pilot valve 3 includes a pilot valve body 31 and an adjusting valve stem module 33. The adjusting valve stem module 33 controls the opening and closing of the main valve 2. The valve body 31 cavity is divided into an upper second pressure-sensing cavity 311 and a lower second fluid cavity 312; the second pressure-sensing cavity 311 is connected to the storage component 1, the second water inlet at one end of the second fluid cavity 312 is connected to the water inlet pipe, and the second water outlet at the other end is connected to the opening of the first pressure-sensing cavity 211; a pilot valve disc 32 for opening and closing the pilot valve fluid channel is movably arranged in the second fluid cavity 312, and a return spring is provided on the pilot valve disc 32, wherein the adjusting valve stem module 33 can push the pilot valve disc 32 to compress the return spring and open the pilot valve fluid channel;

[0029] When the water level of storage component 1 reaches the preset level, the hydraulic pressure regulating valve rod module 33 in the second pressure-sensing cavity 311 pushes the lower end of the regulating valve rod module 33 downward to push the pilot valve disc 32 and compress the return spring. The pilot valve disc 32 separates from the connecting hole of the pilot valve body 31, opening the pilot valve fluid channel, so that the liquid in the water inlet pipe can flow into the first pressure-sensing cavity 211 through the pilot valve fluid channel in the second fluid cavity 312 to increase its pressure. At this time, the hydraulic pressure main valve 2 valve disc assembly in the first pressure-sensing cavity 211 gradually moves downward and seals the connecting hole of the first fluid cavity 212 until the main valve 2 fluid channel in the first fluid cavity 212 is closed, realizing the automatic closure of the main valve 2 and stopping the injection of liquid into the storage component 1.

[0030] When the water level in storage component 1 is lower than the preset level, the hydraulic pressure in the second pressure-sensing cavity 311 is less than the elastic force of the adjusting spring and the balance spring. The adjusting valve stem module 33 moves upward, causing the lower end of the adjusting valve stem module 33 to separate from the pilot valve disc 32. The pilot valve disc 32 moves upward under the elastic force of the return spring and engages with the connecting hole of the pilot valve body 31, closing the pilot valve fluid channel so that liquid cannot flow into the first pressure-sensing cavity 211. This allows the main valve 2 valve disc assembly to move upward under the action of the compression spring, releasing the seal on the connecting hole of the first fluid cavity 212, opening and closing the main valve 2 fluid channel in the first fluid cavity 212, and realizing the automatic opening of the main valve 2 to re-inject liquid into storage component 1. This solves the problem of unstable performance of float valve and loose sealing, and avoids economic losses and environmental pollution caused by the overflow of medium from storage component 1.

[0031] This utility model controls the opening and closing of the main valve 2 through the height pilot valve 3, which is controlled by the water level of the storage component 1, thereby solving the problem of high-precision remote water tower reservoir level control for reservoirs and mountainous urban water pipe networks with large road differences from the ground to the hillside.

[0032] The regulating valve stem module 33 includes a pilot valve diaphragm 331 disposed in the second sensing cavity and a pilot valve stem 332 connected to the pilot valve diaphragm 331; wherein the hydraulic pressure in the second sensing cavity presses down the pilot valve diaphragm 331 and drives the pilot valve stem 332 to move downward, pushing the pilot valve disc 32 to move downward.

[0033] The lower end of the pilot valve stem 332 extends into the second fluid cavity 312 and cooperates with the pilot valve disc 32. Its upper end protrudes from the pilot valve body 31 and is threadedly connected to an adjusting nut 3321. An adjusting spring 3322 is sleeved on the upper end of the pilot valve stem 332. One end of the adjusting spring 3322 abuts against the adjusting nut 3321, and the other end abuts against the pilot valve body 31. By turning the adjusting nut 3321, the preload of the adjusting spring 3322 can be changed, thereby changing the force pushing the pilot valve stem 332 and achieving the purpose of adjusting the water level of the storage component 1.

[0034] To better press down the pilot valve diaphragm 331 and drive the pilot valve stem 332 to move, the lower end of the pilot valve diaphragm 331 is connected to a lower diaphragm pressure plate 333, and the upper end is connected to an upper diaphragm pressure plate 334. A balance spring is sleeved on the lower end of the pilot valve stem 332. The lower end of the balance spring abuts against the pilot valve body 31, and the upper end abuts against the pilot valve stem 332. When the hydraulic pressure in the second pressure-sensing cavity 311 decreases, the balance spring and the adjusting spring 3322 together drive the pilot valve stem 332 to move upward.

[0035] The pilot valve disc 32 has a discharge hole 322 in the middle, which is adapted to the lower end of the pilot valve stem 332. When the pilot valve stem 332 moves downward, the lower end of the pilot valve stem 332 abuts against the discharge hole 322, pushing the pilot valve disc 32 downward and blocking the discharge hole 322, so that the liquid in the second fluid cavity 312 can smoothly enter the first pressure-sensing cavity 211.

[0036] When the pilot valve stem 332 moves upward, the lower end of the pilot valve stem 332 separates from the pilot valve disc 32, and the discharge hole 322 is opened; during the upward movement of the main valve disc 221, the liquid in the first pressure-sensing cavity 211 flows into the second fluid cavity 312 and is discharged from the discharge hole 322; reducing the resistance of the main valve disc 221 moving upward, so that the main valve 2 can be opened quickly.

[0037] The main valve disc assembly 22 includes a main valve disc 221, a main valve stem 222, and a compression spring 223 connected to the main valve diaphragm 23. The upper end of the compression spring 223 abuts against the main valve stem 222, and the lower end abuts against the main valve diaphragm 23. When the liquid in the storage component 1 reaches a preset height, the height guide valve 3 is closed, and the liquid in the second fluid cavity 312 no longer flows into the first pressure-sensing cavity 211. The compression spring 223 drives the main valve disc 221 to move upward through the main valve stem 222, automatically opening the main valve 2.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A liquid level control system, characterized in that: This includes a storage component for storing liquids, a main valve, and a height pilot valve for controlling the opening and closing of the main valve; The main valve includes a main valve body and a main valve diaphragm connected to a main valve disc assembly. The main valve diaphragm divides the cavity of the main valve body into an upper first pressure-sensing cavity and a lower first fluid cavity. The first water inlet at one end of the first fluid cavity is connected to a water inlet pipe, and the first water outlet at the other end is connected to a storage component. The height pilot valve includes a pilot valve body and an adjusting valve stem module. The adjusting valve stem module divides the pilot valve body cavity into an upper second pressure-sensing cavity and a lower second fluid cavity. The second pressure-sensing cavity is connected to a storage component. The second water inlet at one end of the second fluid cavity is connected to a water inlet pipe, and the second water outlet at the other end is connected to the opening of the first pressure-sensing cavity. The second fluid cavity is movably provided with a pilot valve disc for opening and closing the pilot valve fluid passage. The pilot valve disc is provided with a return spring. The regulating valve stem module can push the pilot valve disc to compress the return spring and open the pilot valve fluid passage.

2. The liquid level control system according to claim 1, characterized in that: The regulating valve stem module includes a pilot valve diaphragm disposed in the second sensing cavity and a pilot valve stem connected to the pilot valve diaphragm; The lower end of the pilot valve stem extends into the second fluid cavity to cooperate with the pilot valve disc, and its upper end protrudes out of the pilot valve body and is threaded with an adjusting nut. An adjusting spring is fitted on the upper end of the pilot valve stem. One end of the adjusting spring abuts against the adjusting nut, and the other end abuts against the pilot valve body.

3. A liquid level control system according to claim 2, characterized in that: The lower end of the pilot valve diaphragm is connected to a lower diaphragm pressure plate, and the upper end is connected to an upper diaphragm pressure plate.

4. A liquid level control system according to claim 3, characterized in that: A balance spring is fitted at the lower end of the pilot valve stem. The lower end of the balance spring abuts against the pilot valve body, and the upper end abuts against the pilot valve stem, driving the pilot valve stem to move upward.

5. A liquid level control system according to claim 1, 2, 3, or 4, characterized in that: The pilot valve disc has a discharge hole in the middle, which is adapted to the lower end of the pilot valve stem.

6. A liquid level control system according to claim 1, 2, 3, or 4, characterized in that: The main valve disc assembly includes a main valve disc, a main valve stem, and a compression spring connected to the main valve diaphragm. The upper end of the compression spring abuts against the main valve stem, and the lower end abuts against the main valve diaphragm.

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