CN105114689A - Pressure reduction water tank - Google Patents

Abstract

The invention discloses a decompression water tank, comprising: a tank body, on which a water inlet decompression valve and a water outlet are arranged; a float valve, comprising: a valve body, which has an upper water chamber, a middle water chamber and a lower water chamber , the valve body is provided with an upper liquid inlet connecting the upper water chamber and the reclaimed water chamber, a lower liquid inlet connecting the lower water chamber and the reclaimed water chamber, a liquid inlet connected with the upper water chamber and a liquid outlet connected with the reclaimed water chamber The liquid inlet is connected with the water inlet pressure reducing valve; the drainage pipe is connected with the upper water chamber and the lower water chamber; the valve core is in the closed position of closing the upper liquid inlet and the lower liquid inlet and opening the upper liquid inlet and The opening position of the lower liquid inlet hole is movably set in the valve body; the lever, the hinge node on the lever is hinged on the box body, and the valve core node is connected with the valve core; the floating ball, the floating ball is connected to the floating ball node of the lever superior. The decompression water tank according to the embodiment of the present invention has the advantages of good buffering effect, high reliability, and is suitable for low static pressure working conditions and high and high static pressure working conditions.

Description

Decompression tank

technical field

The invention relates to the field of underground mine water supply, in particular to a decompression water tank.

Background technique

The mine underground water supply system operates continuously, and the decompression water tank enters and exits water at the same time. The water inlet of the water tank is equipped with a float valve that can be switched according to the water level in the water tank.

The float valve in the related art is only suitable for low static pressure random quantitative working conditions. Under the continuous working condition of high and medium static pressure, since the valve core of the float valve bears a large high static pressure opening force, the float must be very large. Large enough buoyancy can be generated to overcome the static pressure to close the valve, resulting in a large space occupied by the float.

Contents of the invention

The present invention aims to solve one of the above-mentioned technical problems in the related art at least to a certain extent. Therefore, the present invention proposes a decompression water tank, which has the advantages of good buffering effect, high reliability, and is suitable for both low and high static pressure working conditions.

In order to achieve the above object, a decompression water tank is proposed according to an embodiment of the present invention. The decompression water tank includes: a tank body, a water inlet pressure reducing valve and a water outlet are arranged on the tank body; The ball valve is located in the box, including: a valve body, the valve body has an upper water chamber, a middle water chamber and a lower water chamber, and the valve body is provided with an upper inlet that communicates with the upper water chamber and the middle water chamber. A liquid hole, a lower liquid inlet connecting the lower water chamber and the middle water chamber, a liquid inlet connected to the upper water chamber and a liquid outlet connected to the middle water chamber, the liquid inlet and the middle water chamber The water inlet decompression valve is connected; the drainage pipe is connected to the valve body and communicates with the upper water chamber and the lower water chamber; the valve core is used to close the upper liquid inlet hole and the closed position of the lower liquid inlet hole and the open position of opening the upper liquid inlet hole and the lower liquid inlet hole are arranged in the valve body so as to move up and down; the lever is provided with a hinge node , a spool node and a float node, the spool node is located between the hinge node and the float node, the hinge node is hinged on the box, the spool node and the spool connected; a floating ball, the floating ball is connected to the floating ball node.

The decompression water tank according to the embodiment of the present invention has the advantages of good buffering effect, high reliability, and is suitable for low static pressure working conditions and high and high static pressure working conditions.

In addition, the decompression water tank according to the above embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, a guide rod is provided on the floating ball, and the guide rod is connected to the node of the floating ball so as to move up and down, and a stop plate is provided at the upper end of the guide rod.

According to an embodiment of the present invention, the ball float valve further includes a balance ball, and a balance ball node is further provided on the lever, and the balance ball node and the float ball node are respectively located at both ends of the lever and the The hinge node is located between the balance ball node and the valve core node, the balance ball is connected to the balance ball node, and the partial weight between the hinge node and the balance ball node of the lever is the same as that of the balance ball The sum of the moments of the weight of the hinge node to the hinge node is equal to the sum of the partial weight of the lever between the hinge node and the float node and the moment of the weight of the spool to the hinge node.

According to an embodiment of the present invention, a sleeve is provided at the node of the floating ball of the lever, and the guide rod passes through the sleeve.

According to an embodiment of the present invention, the valve body includes: a body, a partition is arranged in the body, and the partition defines a reclaimed water chamber and a lower water chamber in the body, and the lower liquid inlet hole is provided On the partition, the upper liquid inlet hole is arranged on the top wall of the body, the liquid outlet is arranged on the side wall of the body and extends along the circumference of the body, and the lever passes through through the liquid outlet; a water inlet pipe, the water inlet pipe is connected to the top wall of the body and defines the upper water chamber, and the liquid inlet is arranged on the water inlet pipe.

According to an embodiment of the present invention, the drainage pipe is arranged outside the valve body, one end of the drainage pipe is connected to the side wall of the water inlet pipe and the other end is connected to the bottom wall of the body.

According to an embodiment of the present invention, the lower liquid inlet hole is an upper flange hole.

According to an embodiment of the present invention, the spool includes: a spool, the spool node of the lever is connected to the spool; an upper valve flap, the upper valve flap is connected to the upper end of the spool and Located in the middle water cavity; the lower disc, the lower valve disc is connected to the lower end of the valve column and located in the lower water cavity, when the valve core is in the closed position, the upper valve disc is closed. The upper liquid inlet hole and the lower valve disc close the lower liquid inlet hole. When the valve core is in the open position, the upper valve disc opens the upper liquid inlet hole and the lower valve disc opens the lower inlet hole. liquid hole.

According to an embodiment of the present invention, the upper valve disc is provided with an upper sealing ring, and the lower valve disc is provided with a lower sealing ring, and when the valve core is in the closed position, the upper sealing ring seals the The gap between the upper valve disc and the upper liquid inlet hole and the lower sealing ring seal the gap between the lower valve disc and the lower liquid inlet hole.

According to an embodiment of the present invention, the spool is provided with an elongated hole extending in the horizontal direction, and a connecting post is provided at the node of the spool of the lever, and the connecting post is fitted in the elongated hole in a horizontally movable manner. Inside.

According to an embodiment of the present invention, the cross-sectional area of the upper liquid inlet hole is equal to the cross-sectional area of the lower liquid inlet hole.

Description of drawings

Fig. 1 is a schematic structural view of a float valve according to an embodiment of the present invention.

2-5 are schematic diagrams of the working process of the decompression water tank according to the embodiment of the present invention.

Fig. 6 is a schematic structural diagram of an underground depressurized water supply system according to an embodiment of the present invention.

Reference signs: Downhole decompression water supply system 1, decompression water tank 10, tank body 11, water inlet decompression valve 12, water outlet 13, float valve 14;

Valve body 100, upper water chamber 110, middle water chamber 120, lower water chamber 130, upper liquid inlet 140, lower liquid inlet 150, liquid inlet 160, liquid outlet 170, body 180, partition 181, water inlet pipe 190, Drainage tube 200, spool 300, spool 310, oblong hole 311, upper disc 320, upper sealing ring 321, lower disc 330, lower sealing ring 331, lever 400, hinge node 410, spool node 420, connecting column 421 , float node 430 , sleeve 431 , balance ball node 440 , float 500 , guide rod 510 , stop plate 511 , balance ball 600 .

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

A decompression water tank 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 2-5 , the decompression water tank 10 according to the embodiment of the present invention includes a tank body 11 and a float valve 14 .

First, the float valve 14 according to the embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1 , the ball float valve 14 according to the embodiment of the present invention includes a valve body 100 , a drain tube 200 , a valve core 300 , a lever 400 and a float ball 500 .

The valve body 100 has an upper water chamber 110, a middle water chamber 120 and a lower water chamber 130 (the up and down direction is shown by the arrow A in the drawing), and the valve body 100 is provided with an upward inlet connecting the upper water chamber 110 and the middle water chamber 120. The liquid hole 140, the lower liquid inlet hole 150 communicating with the lower water chamber 130 and the middle water chamber 120, the liquid inlet 160 communicating with the upper water chamber 110 and the liquid outlet 170 communicating with the middle water chamber 120, wherein the upper liquid inlet hole 140 The cross-sectional area is equal to the cross-sectional area of the lower liquid inlet hole 150. The drainage tube 200 is connected to the valve body 100 , and the drainage tube 200 communicates with the upper water chamber 110 and the lower water chamber 130 . The valve core 300 is movable up and down in the valve body 100 between the closed position and the open position. When the valve core 300 is in the closed position, the upper liquid inlet hole 140 and the lower liquid inlet hole 150 are closed, and the upper water chamber 110 and the lower liquid inlet hole are closed. The liquid in the lower water chamber 130 cannot enter the reclaimed water chamber 120 . When the valve core 300 is in the open position, the upper liquid inlet hole 140 and the lower liquid inlet hole 150 are opened, and the liquid in the upper water chamber 110 and the lower water chamber 130 enters the middle water chamber 120 and flows out through the liquid outlet 170 . The lever 400 is provided with a hinge node 410 , a spool node 420 and a float node 430 , the spool node 420 is located between the hinge node 410 and the float node 430 , and the spool node 420 is connected to the spool 300 . The float 500 is connected to the float node 430 .

In the decompression water tank 10 according to the embodiment of the present invention, the tank body 11 is provided with a water inlet decompression valve 12 and a water outlet 13 . The float valve 14 is arranged in the box body 11, the valve body 100 is fixed on the box body 11 and the liquid inlet 160 communicates with the water inlet pressure reducing valve 12, and the hinge node 410 of the lever 400 is hinged on the box body 11, that is, the hinge node 410 The connection with the box body 11 is a rotary pair.

According to the ball float valve 14 of the embodiment of the present invention, by setting the drainage pipe 200, and the drainage pipe 200 is connected to the upper water chamber 110 and the lower water chamber 130, the low pressure ( When the float valve 14 is closed, the static pressure before and after the water inlet pressure reducing valve 12 is equal) the water is guided from the top of the spool 300 to the bottom of the spool 300, so that the top and bottom of the spool 300 reach a pressure balance, which can greatly reduce the pressure. The power required for the closing of the small spool 300 is suitable for high and medium static pressure conditions such as pressure greater than or equal to 4 MPa, without increasing the volume of the float 500 . Therefore, the float valve 14 according to the embodiment of the present invention occupies less space, and is suitable for both low and high static pressure conditions.

According to the decompression water tank 10 of the embodiment of the present invention, by setting the water inlet pressure reducing valve 12 and using the float valve 14 according to the above embodiment of the present invention, the water inlet pressure reducing valve 12 can be used to greatly reduce the water inlet flow rate and reduce the impact of the water flow , and the dual functions of opening, closing, raising and lowering (controlling the water level) of the float valve 14 can be used to make the decompression water tank 10 have a buffer function, improve the automatic control function of the decompression water tank 10, and improve the reliability of the decompression water tank 10 . The decompression water tank 10 can be applied to the decompression and buffering of the ultra-deep well high-pressure downhole water supply system, and is an open water tank. Downhole medium-pressure water is decompressed through the water inlet pressure reducing valve 12 and then flows into the tank 11 through the float valve 14 to be converted into unpressurized water to form a medium-static pressure system. The water outlet 13 at the bottom of the tank 11 can be connected to the next medium-static pressure system. pressure system. During the normal production of water in the underground of the mine, the decompression water tank 10 flows into the decompressed low-pressure water, and at the same time flows out the unpressurized water into the next system, and the water supply system runs continuously.

The following describes a float valve 14 according to a specific embodiment of the present invention with reference to the accompanying drawings.

In some specific embodiments of the present invention, as shown in FIG. 1 , the ball float valve 14 according to the embodiment of the present invention includes a valve body 100 , a drainage tube 200 , a valve core 300 , a lever 400 and a float 500 .

Further, as shown in FIGS. 1-5 , the top of the float 500 is connected with a vertically extending guide rod 510, and the guide rod 510 can move up and down and is connected to the float node 430. For example, the float node 430 is provided with The sleeve 431 , the guide rod 510 passes through the sleeve 431 . An upper end of the guide rod 510 is provided with a stop plate 511 . Thus, the up-and-down movement pair of the guide rod 510 and the floating ball node 430 can be used to make the force of the floating ball 500 on the lever 400 intermittent, that is, only when the floating ball 500 or the stopper plate 511 contacts the lever 400 Play a role on the lever 400, thereby reducing the opening and closing times of the spool 300, and avoiding the non-stop switching of the float valve 14 under continuous water conditions. The float valve 14 has dual functions of opening, closing, raising and lowering (controlling water level) .

Further, as shown in FIGS. 1-5 , the float valve 14 also includes a balance ball 600, and the lever 400 is further provided with a balance ball node 440. The balance ball node 440 and the float node 430 are respectively located at the two ends of the lever 400 and are hinged. The node 410 is located between the balance ball node 440 and the spool node 420 , and the balance ball 600 is connected to the balance ball node 440 . Wherein, the sum of the partial weight between the hinge node 410 of the lever 400 and the balance ball node 440 and the moment of the weight of the balance ball 600 to the hinge node 410 is equal to the partial weight and The sum of the moments of the weight of the spool 300 on the hinge joint 410 . Thus the weight of the balance ball 600 can be used to balance the weight of the lever 400 and the valve core 300, so that when the float 500 does not act on the lever 400, the position of the valve core 300 is basically stable, so that the switch of the float valve 14 in a basically stable state.

The following describes the working process of the float valve 14 according to the embodiment of the present invention with reference to FIGS. 2-5 .

As shown in Figure 2, when the spool 300 is in the open position and the water inflow of the tank 11 is greater than the water outflow, the water in the tank 11 is more inflow and less outflow, the water level rises, and the guide rod 510 moves upward at the float node 430, At this time, the floating ball 500 has not touched the lever 400 and has no effect on the lever 400. Under the action of the balance ball 600, the lever 400 is in a balanced state, and the spool 300 remains in the open position.

As shown in Figure 3, as the water level in the tank 11 gradually rises, the floating ball 500 touches the lever 400, the floating ball 500 pushes the lever 400 to move upward, the lever 400 drives the valve core 300 to move upward to the closed position, and the valve core 300 is closed The upper liquid inlet 140 and the lower liquid inlet 150 stop water intake.

As shown in Figure 4, the water in the tank 11 no longer flows in and flows out normally, the water level in the tank 11 drops, and the floating ball 500 then drops away from the lever 400. Under the action of the balance ball 600, the lever 400 maintains balance. The spool 300 remains in a closed state.

As shown in Figure 5, as the water level drops further, the floating ball 500 and the guide rod 510 continue to move downward. When the stop plate 511 on the upper end of the guide rod 510 touches the lever 400, the gravity of the floating ball 500 drives the lever 400 to move downward. The lever 400 drives the spool 300 to move down to the open state, and the tank 11 starts to enter water again, and enters the next cycle.

In some specific examples of the present invention, as shown in FIG. 1 , the valve body 100 includes a body 180 and a water inlet pipe 190 . The body 180 is provided with a partition 181, the partition 181 defines the middle water chamber 120 and the lower water chamber 130 in the body 180, the lower liquid inlet 150 is arranged on the partition 181, and the upper liquid inlet 140 is arranged on the top wall of the body 180 Above, the liquid outlet 170 is provided on the side wall of the body 180 and extends along the circumference of the body 180 , and the lever 400 passes through the liquid outlet 170 . The water inlet pipe 190 is connected to the top wall of the body 180 and defines the upper water cavity 110 , and the liquid inlet 160 is formed at the upper end of the water inlet pipe 190 . Thus, an upper water chamber 110, a middle water chamber 120 and a lower water chamber 130 can be formed in the valve body 100, and an upper liquid inlet hole 140 communicating with the upper water chamber 110 and the middle water chamber 120 and a lower water chamber 130 can be formed on the valve body 100. The lower liquid inlet 150 of the middle water chamber 120 , the upper liquid inlet 140 connected with the upper water chamber 110 and the liquid outlet 170 connected with the middle water chamber 120 can also facilitate the connection of the lever 400 and the valve core 300 .

Optionally, as shown in FIG. 1 , the drainage tube 200 is arranged outside the valve body 100, and one end of the drainage tube 200 is connected to the side wall of the water inlet pipe 190 and the other end is connected to the bottom wall of the body 180, so that the upper water The water in the cavity 110 is introduced into the lower water cavity 130, so that the pressures at the top and bottom of the valve core 300 are balanced.

Advantageously, as shown in FIG. 1 , the lower liquid inlet hole 150 on the partition 181 is an upper flange hole, thereby not only strengthening the structural strength, but also improving the sealing performance of the valve core 300 when closing the lower liquid inlet hole 150 .

In some specific embodiments of the present invention, as shown in FIG. 1 , the valve core 300 includes a valve column 310 , an upper valve disc 320 and a lower valve disc 330 . The spool node 420 of the lever 400 is connected to the spool 310 . The upper valve disc 320 is connected to the upper end of the valve column 310 and located in the reclaimed water cavity 120 . The lower valve flap 330 is connected to the lower end of the valve column 310 and located in the lower water cavity 130 . When the spool 300 is in the closed position, the upper valve flap 320 closes the upper liquid inlet hole 140 and the lower valve flap 330 closes the lower liquid inlet hole 150; The valve disc 330 opens the lower liquid inlet hole 150 .

Specifically, as shown in FIG. 1 , the top of the upper disc 320 and the top of the lower disc 330 are both frusto-conical in cross-sectional area gradually increasing from top to bottom, and the valve core 300 moves upwards from the open position. When it reaches the closed position, the upper valve flap 320 can automatically correct and block the upper liquid inlet hole 140 and the lower valve flap 330 can automatically correct and block the lower liquid inlet hole 150 .

Advantageously, as shown in Figure 1 , the upper valve disc 320 is provided with an upper sealing ring 321, and the lower valve disc 330 is provided with a lower sealing ring 331. When the valve core 300 is in the closed position, the upper sealing ring 321 seals the upper valve. The gap between the flap 320 and the upper liquid inlet hole 140 , and the lower sealing ring 331 seals the gap between the lower valve flap 330 and the lower liquid inlet hole 150 . This can improve the sealing performance when the float valve 14 is closed.

Optionally, the spool 310 is provided with an oblong hole 311 extending in the horizontal direction, and the spool node 420 of the lever 400 is provided with a connecting post 421 , and the connecting post 421 is fitted in the oblong hole 311 so as to be able to move horizontally. Thus, the spool 300 can be connected to the spool node 420 of the lever 400, and the spool 300 can move horizontally on the lever 400, that is, the connection between the spool 300 and the lever 400 is a horizontal movement pair, thereby making the lever 400 more smooth. The ground drives the spool 300 to move up and down between the open position and the closed position.

The ball float valve 14 according to the embodiment of the present invention operates fully mechanically and automatically, and can realize water pressure self-balancing and gravity self-balancing. Control water level) double function.

The downhole depressurized water supply system 1 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIG. 6 , the downhole decompression water supply system 1 according to the embodiment of the present invention includes several decompression water tanks 10 according to the above-mentioned embodiments of the present invention.

Wherein, the water outlet 13 of one of the two adjacent decompression water tanks 10 communicates with the water inlet decompression valve 12 of the other, that is, several decompression water tanks 10 are connected in series.

According to the underground decompression water supply system 1 of the embodiment of the present invention, by using the decompression water tank 10 according to the above embodiment of the present invention, the high-pressure system is converted into several medium-pressure systems, the static pressure of the system is reduced, and the feasibility of system construction is increased. It improves the reliability of the system and is suitable for underground water supply in ultra-deep wells (depth greater than or equal to 1200m).

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore It should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the present invention, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may include direct contact between the first and second features, and may also include the first and second features Not in direct contact but through another characteristic contact between them. Moreover, "above", "above" and "above" the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. "Below", "beneath" and "under" the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (11)

1. A decompression water tank, characterized in that, comprising: A box body, the box body is provided with a water inlet pressure reducing valve and a water outlet; Ball float valve, the ball float valve is located in the box, including: The valve body has an upper water chamber, a middle water chamber and a lower water chamber, and the valve body is provided with an upper liquid inlet hole communicating with the upper water chamber and the middle water chamber, and communicating with the lower water chamber and the lower water chamber. The lower liquid inlet hole of the reclaimed water chamber, the liquid inlet connected with the upper water chamber and the liquid outlet connected with the reclaimed water chamber, the liquid inlet communicated with the water inlet pressure reducing valve; a drainage tube, the drainage tube is connected to the valve body and communicates with the upper water cavity and the lower water cavity; A spool, the spool is movable up and down between the closed position of closing the upper liquid inlet hole and the lower liquid inlet hole and the open position of opening the upper liquid inlet hole and the lower liquid inlet hole. inside the valve body; a lever, the lever is provided with a hinge node, a valve core node and a floating ball node, the valve core node is located between the hinge node and the floating ball node, the hinge node is hinged on the box, The spool node is connected to the spool; A floating ball, the floating ball is connected to the floating ball node. 2. The decompression water tank according to claim 1, wherein a guide rod is provided on the floating ball, and the guide rod is connected to the node of the floating ball movable up and down, and the upper end of the guide rod With stop plate. 3. The decompression water tank according to claim 1, wherein the ball float valve also includes a balance ball, and the lever is further provided with a balance ball node, and the balance ball node and the float ball node are respectively located at The two ends of the lever and the hinge node are located between the balance ball node and the valve core node, the balance ball is connected to the balance ball node, and the hinge node of the lever and the balance ball node The sum of the partial weight between and the moment of the weight of the balance ball to the hinge node is equal to the partial weight between the hinge node of the lever and the floating ball node and the moment of the weight of the valve core to the hinge node Sum. 4. The decompression water tank according to claim 2, wherein a sleeve is provided at the node of the floating ball of the lever, and the guide rod passes through the sleeve. 5. The decompression water tank according to claim 1, wherein the valve body comprises: The body, the body is provided with a partition, the partition defines a middle water chamber and a lower water chamber in the body, the lower liquid inlet is arranged on the partition, and the upper liquid inlet is arranged on the On the top wall of the body, the liquid outlet is provided on the side wall of the body and extends along the circumference of the body, and the lever passes through the liquid outlet; A water inlet pipe, the water inlet pipe is connected to the top wall of the body and defines the upper water cavity, and the liquid inlet is arranged on the water inlet pipe. 6. The decompression water tank according to claim 5, characterized in that, the drainage pipe is arranged outside the valve body, one end of the drainage pipe is connected to the side wall of the water inlet pipe and the other end is connected to the body connected to the bottom wall. 7. The decompression water tank according to claim 5, wherein the lower liquid inlet hole is an upper flange hole. 8. The decompression water tank according to claim 1, wherein the valve core comprises: a spool on which the spool node of the lever is connected; an upper valve flap, the upper valve flap is connected to the upper end of the valve column and is located in the reclaimed water chamber; A lower disc, the lower disc is connected to the lower end of the spool and is located in the lower water chamber, when the valve core is in the closed position, the upper disc closes the upper liquid inlet hole and the lower The valve flap closes the lower liquid inlet hole, and when the valve core is in the open position, the upper valve flap opens the upper liquid inlet hole and the lower valve flap opens the lower liquid inlet hole. 9. The decompression water tank according to claim 8, wherein an upper seal ring is provided on the upper disc, a lower seal ring is provided on the lower disc, and the valve core is in the closed position. At this time, the upper sealing ring seals the gap between the upper valve disc and the upper liquid inlet hole, and the lower sealing ring seals the gap between the lower valve disc and the lower liquid inlet hole. 10. The decompression water tank according to claim 8, characterized in that, the spool is provided with an oblong hole extending in the horizontal direction, and a connecting post is provided at the node of the spool of the lever, and the connecting post can be Fitted horizontally in the oblong hole. 11. The decompression water tank according to claim 1, wherein the cross-sectional area of the upper liquid inlet hole is equal to the cross-sectional area of the lower liquid inlet hole.