Flush valve and drip irrigation device

Abstract

The present invention provides a flushing valve and a drip irrigation device, which relate to the technical field of irrigation equipment. The flushing valve comprises a valve body and an elastic diaphragm, the valve body comprises a valve seat and a valve cover, a receiving chamber is formed between the valve cover and the valve seat, the elastic diaphragm is arranged in the receiving chamber, and the receiving chamber is divided into a first chamber and a second chamber, and the elastic diaphragm is provided with a connecting channel; the side wall of the first chamber is provided with a water inlet for communicating with a capillary tube and a drain for draining water, the elastic diaphragm can block the water inlet when deformed under pressure, and the water inlet end of the connecting channel corresponds to the water inlet; the side wall of the second chamber is provided with an exhaust assembly, and the exhaust assembly is used to exhaust the gas in the second chamber. The drip irrigation device comprises a capillary tube, an emitter and the above-mentioned flushing valve, the emitter is arranged on the capillary tube, and the end of the capillary tube is connected to the water inlet of the flushing valve. The flushing valve can enable the irrigation device to achieve automatic flushing for a long time and can be automatically closed, without consuming labor, with high work efficiency and good flushing effect.

Description

Technical Field

[0001] The invention relates to the technical field of irrigation equipment, in particular to a flushing valve and a drip irrigation device. Background Art

[0002] Drip irrigation is an irrigation method that drips water and nutrients into the soil in the root zone of crops in the form of drops through a drip irrigation system according to the water needs of crops. It has the advantages of saving water, fertilizer and labor, and is one of the most efficient irrigation technologies in the irrigation field.

[0003] During the operation of the drip irrigation system, small suspended particles such as silt, organic matter, microorganisms and chemical precipitates in the water can enter the drip irrigation system through the filter, causing the emitter of the drip irrigation system to be blocked. Regularly flushing the capillary tubes of the drip irrigation system is one of the most effective ways to control the blockage of the emitter. During flushing, the water entering the capillary tubes is directly discharged from the end. During the flow, the water flow flushes the sediment in the capillary tubes and the attachments on the inner wall of the capillary tubes, and discharges them directly from the end of the capillary tubes.

[0004] At present, the common flushing operation of the drip irrigation system is: the operator manually removes the plug at the end of the capillary tube or the plastic ball valve to flush for a period of time. After the flushing is completed, the operator manually plugs the plug or closes the ball valve, which consumes a lot of labor and has low work efficiency. Summary of the invention

[0005] The purpose of the present invention includes providing a flushing valve and a drip irrigation device to alleviate the technical problems of large labor consumption and low work efficiency when flushing the drip irrigation system in the prior art.

[0006] The embodiment provides a flushing valve, comprising a valve body and an elastic diaphragm, wherein the valve body comprises a valve seat and a valve cover detachably fixed to the valve seat, an accommodating cavity is formed between the valve cover and the valve seat, the elastic diaphragm is arranged in the accommodating cavity, the elastic diaphragm divides the accommodating cavity into a first cavity and a second cavity, and the elastic diaphragm is provided with a communication channel connecting the first cavity and the second cavity; a water inlet for communicating with a capillary tube and a drainage port for drainage are provided on the side wall of the valve body corresponding to the first cavity, the elastic diaphragm can block the water inlet when deformed under pressure, and the water inlet end of the communication channel corresponds to the water inlet;

[0007] The side wall of the valve body corresponding to the second chamber is provided with an exhaust component, and the exhaust component is used to exhaust the gas in the second chamber.

[0008] In an optional embodiment, the outer wall of the valve cover is provided with a first joint connected to the second chamber, the exhaust assembly includes an exhaust cap and a floating body, the exhaust cap is sealed at the first joint, and an exhaust cavity is formed between the exhaust cap and the first joint, and the top wall of the exhaust cap is provided with an exhaust hole; the floating body is movably accommodated in the exhaust cavity.

[0009] In an optional embodiment, a groove is provided on the top of the floating body, a sealing member is embedded in the groove, and the sealing member corresponds to the exhaust hole;

[0010] And / or, a conical exhaust nozzle is provided inwardly on the top wall of the exhaust cap, and the exhaust hole passes through the exhaust nozzle; the constricted end of the exhaust nozzle faces the floating body.

[0011] In an optional embodiment, a first clamping groove is provided in the valve seat along its circumference, and a first clamping boss is provided on the edge of the elastic diaphragm along its circumference, and the first clamping boss matches the first clamping groove; a clamping boss is provided in the valve cover along its circumference, and the clamping boss matches and abuts against a side of the elastic diaphragm opposite to the first clamping boss;

[0012] An installation space is reserved between the clamping boss and the side wall of the valve cover, the side wall of the valve seat is inserted into the installation space, and the valve seat is threadedly connected to the side wall of the valve cover.

[0013] In an optional embodiment, the flushing valve also includes a flow channel seat and a connector fixedly connected to the flow channel seat, the flow channel seat is located in the second chamber, and the connector passes through the elastic diaphragm; the connecting channel includes a water inlet section and a maze-shaped extension section, the water inlet section is arranged in the connector, and the extension section is arranged in the flow channel seat, the water inlet end of the water inlet section is connected to the first chamber, the water outlet end of the water inlet section is connected to the water inlet end of the extension section, and the water outlet end of the extension section is connected to the second chamber.

[0014] In an optional embodiment, the flow channel seat includes a plurality of spliced ​​seat bodies, a first splicing wall and a second splicing wall of two adjacent seat bodies for splicing form a splicing surface, the extension section extends to one or more of the splicing surfaces, and the extension section is formed by splicing a first groove body provided on the first splicing wall and the second splicing wall in the splicing surface;

[0015] Alternatively, the extension section is formed by splicing a first groove body of a first splicing wall and a second groove body of a second splicing wall in the splicing surface.

[0016] In an optional embodiment, the flow channel seat is a cylinder, the seat body is a fan-shaped body, and a plurality of the seat bodies are arranged along the circumference of the flow channel seat; the flushing valve also includes a cylindrical ferrule, and the ferrule is detachably mounted on the flow channel seat.

[0017] In an optional embodiment, a drainage hole is provided at a position corresponding to the water inlet of the elastic diaphragm, and a lip is provided on the side wall of the elastic diaphragm located in the first chamber, a gap exists between the lip and the elastic diaphragm, and the lip can cover the drainage hole.

[0018] In an optional embodiment, a support boss is provided at a position of the inner wall of the valve cover opposite to the connecting head, and the support boss includes a plurality of arc-shaped protrusions, the plurality of arc-shaped protrusions are distributed in a ring shape, and gaps are left between adjacent arc-shaped protrusions.

[0019] The embodiment further provides a drip irrigation device, comprising a capillary tube, an emitter and the above-mentioned flushing valve, wherein the emitter is arranged on the capillary tube, and the end of the capillary tube is connected to the water inlet of the flushing valve.

[0020] The beneficial effects of the flushing valve and the drip irrigation device of the present invention include:

[0021] The present invention provides a flushing valve and a drip irrigation device, wherein the flushing valve includes a valve seat and a valve cover which together form a valve body, an elastic diaphragm which is used to divide the accommodating cavity inside the valve seat into two chambers, and the elastic diaphragm is provided with a connecting channel connecting the two chambers, and also includes an exhaust component for exhausting the gas in the second chamber; wherein the drip irrigation device includes a capillary tube for conveying water and an emitter for dripping the water in the capillary tube into the soil in the form of water drops.

[0022] Initially, the head end of the capillary tube is connected to the external water supply device, the end of the capillary tube is connected to the water inlet of the flushing valve, and the first chamber and the second chamber of the valve body are filled with air; when drip irrigation is required, the external water supply device supplies water to the capillary tube of the drip irrigation device, and the water in the capillary tube flushes the inner wall of the capillary tube during the process of flowing through the capillary tube, and carries away the impurities in the capillary tube. The water flowing to the end of the capillary tube flows into the first chamber through the water inlet and is discharged through the drain outlet, thereby realizing the flushing of the drip irrigation device with water. Among them, after the water flows into the first chamber, under the action of water pressure, part of the water also flows into the second chamber through the connecting channel. The exhaust component is in an open state at this time. As the amount of water in the second chamber increases, the gas in the second chamber is squeezed by the water and discharged through the exhaust component until the second chamber is full of water and the exhaust component is closed. Since the water in the first chamber is continuously discharged through the drain port, the internal pressure is relatively small. At the same time, the water in the first chamber can continuously supply water to the second chamber. As the amount of water in the second chamber increases, the pressure difference between the first chamber and the second chamber gradually increases. The pressure of the water in the second chamber pressing the elastic diaphragm toward the direction of the first chamber also gradually increases. The elastic diaphragm is deformed toward the direction of the water inlet until the water inlet is blocked. At this time, the water flow at the end of the capillary tube cannot flow into the first chamber, and can be connected with the second chamber through the connecting channel, providing water pressure for the second chamber so that it is in a dynamic equilibrium state, ensuring the pressure of the water in the second chamber on the elastic diaphragm, and the flushing process of the drip irrigation device is completed. The water in the capillary tube drips the soil through the emitter.

[0023] After the drip irrigation is finished, the external water supply device stops supplying water, and the water pressure in the capillary tube decreases. Under the action of the pressure difference and its own gravity, the water in the second chamber can flow back to the first chamber through the connecting channel. At this time, the exhaust component is in the open state, and the external air enters the second chamber as the amount of water in the second chamber decreases, and the water in the first chamber is discharged through the drain port, thereby realizing a watering process of the drip irrigation device.

[0024] First, the use of the flushing valve can realize automatic flushing and automatic closing of the drip irrigation device for a certain period of time before drip irrigation, thereby greatly reducing labor consumption, and when the above-mentioned flushing valves are installed at the ends of multiple capillary tubes, the flushing valves can work simultaneously, thereby improving their working efficiency. In addition, the setting of the exhaust component makes it possible for the power source for providing deformation pressure for the elastic diaphragm in the second chamber to be entirely the water in the second chamber. When the elastic diaphragm is deformed to block the water inlet, the amount of water in the second chamber is the sum of the initial volume V1 of the second chamber before the elastic diaphragm is deformed and the deformation volume V2 of the elastic diaphragm after deformation. Compared with the case where the exhaust component is not provided, the air in the second chamber cannot be discharged, and the air and water in the second chamber jointly provide deformation pressure for the elastic diaphragm. When the elastic diaphragm is deformed to block the water inlet, the amount of water in the second chamber is nearly It is similar to the deformation volume V2 of the elastic diaphragm after deformation (the volume of the air in the second chamber is the initial volume V1 of the second chamber); since the time for the elastic diaphragm to deform and block the water inlet directly determines the effective flushing time of the drip irrigation device, the time for the second chamber of the present application to be filled with water is much longer than the time when the exhaust component is not provided (the filling time of approximately the volume V1 is increased compared to when the exhaust component is not provided), thereby effectively extending the flushing time of the drip irrigation device, improving its flushing effect, reducing the probability of blockage of the capillary tube and the emitter, and ensuring the normal use of the drip irrigation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 An axonometric view of a flush valve provided by an embodiment of the present invention in a first structure;

[0027] Figure 2 A top view of the flush valve provided by an embodiment of the present invention when it is in a first structure;

[0028] Figure 3 for Figure 2 Cross-sectional view in the AA direction when the middle flushing valve is not in operation;

[0029] Figure 4 for Figure 3 A partial enlarged view of B in the middle;

[0030] Figure 5 for Figure 2 The cross-sectional view in the AA direction when the flushing process of the middle flushing valve begins;

[0031] Figure 6 for Figure 5 A partial enlarged view of middle C;

[0032] Figure 7 for Figure 2 A cross-sectional view in the AA direction when the water level in the second chamber is higher than the floating body after the middle flushing valve has flushed for a period of time;

[0033] Figure 8 for Figure 2 After the gas is completely exhausted during the flushing process of the middle flushing valve, the cross-sectional view in the AA direction when the floating body blocks the exhaust hole;

[0034] Fig. 9 for Figure 2 The cross-sectional view in the AA direction when the flushing process of the middle flushing valve is completed and the elastic diaphragm blocks the water inlet;

[0035] Fig.10 for Figure 2 Cross-sectional view of the flushing valve during drainage in the AA direction;

[0036] Fig.11 An exploded view of a flush valve provided by an embodiment of the present invention when it is in a first structure;

[0037] Fig.12 for Fig.11 Schematic diagram of the structure of the middle valve seat;

[0038] Fig.13 for Fig.11 Schematic diagram of the structure of the middle valve cover;

[0039] Fig.14 for Fig.11 First-person view of the mesoelastic diaphragm;

[0040] Fig.15 for Fig.11 Schematic diagram of the middle elastic diaphragm from the second perspective;

[0041] Fig.16 for Fig.11 A cross-sectional view of the middle elastic diaphragm;

[0042] Fig.17 for Fig.11 A schematic diagram of the structure in which the middle ferrule and the flow channel seat are assembled together;

[0043] Fig.18 for Fig.11 Schematic diagram of the structure of the middle exhaust cap;

[0044] Fig.19 A cross-sectional view of a flush valve provided by an embodiment of the present invention when it is in a second structure;

[0045] Fig. 20 for Fig.19 Exploded view of the middle section flushing valve;

[0046] Fig.21 for Fig.19 Exploded view of the midstream seat.

[0047] Icons: 100-elastic diaphragm; 110-first clamping boss; 120-second clamping slot; 130-drain hole; 140-lip; 150-connecting hole; 200-valve seat; 210-water inlet; 220-drain outlet; 230-first clamping slot; 240-second clamping boss; 250-second joint; 260-reinforcement rib; 270-second connecting hole; 300-valve cover; 310-first joint; 320-pressing boss; 321-first connecting hole; 322-installation space; 330-supporting boss; 331-arc-shaped protrusion; 340-extending boss; 400-first Chamber; 500-second chamber; 600-connecting channel; 610-flow channel seat; 611-first seat body; 612-second seat body; 613-third seat body; 614-fourth seat body; 620-connector; 621-cross clamp joint; 630-water inlet section; 640-extension section; 641-first trough body; 642-transverse part; 643-vertical part; 650-ferrule; 660-support member; 700-exhaust assembly; 710-exhaust cap; 720-floating body; 721-embedded groove; 730-exhaust nozzle; 740-exhaust hole; 750-exhaust cavity; 760-seal. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0049] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0051] In the description of the present invention, it should be noted that the terms "upper", "lower", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the inventive product is usually placed when in use, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0052] In addition, the terms "horizontal" and "vertical" do not mean that the components must be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0053] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0055] This embodiment provides a flushing valve, such as Figure 3 and Fig.19 As shown, it includes a valve body and an elastic diaphragm 100, the valve body includes a valve seat 200 and a valve cover 300 detachably fixed to the valve seat 200, a receiving chamber is formed between the valve cover 300 and the valve seat 200, the elastic diaphragm 100 is arranged in the receiving chamber, the elastic diaphragm 100 divides the receiving chamber into a first chamber 400 and a second chamber 500, and the elastic diaphragm 100 is provided with a connecting channel 600 connecting the first chamber 400 and the second chamber 500; the side wall of the valve body corresponding to the first chamber 400 is provided with a water inlet 210 for communicating with a capillary tube and a drain port 220 for draining water, the elastic diaphragm 100 can block the water inlet 210 when deformed under pressure, and the water inlet end of the connecting channel 600 corresponds to the water inlet 210; the side wall of the valve body corresponding to the second chamber 500 is provided with an exhaust component 700, and the exhaust component 700 is used to discharge the gas in the second chamber 500.

[0056] This embodiment further provides a drip irrigation device, including a capillary tube, an emitter and the above-mentioned flushing valve. The emitter is arranged on the capillary tube, and the end of the capillary tube is connected to the water inlet 210 of the flushing valve.

[0057] The flushing valve and drip irrigation device provided in this embodiment, wherein the flushing valve includes a valve seat 200 and a valve cover 300 that together form a valve body, an elastic diaphragm 100 for dividing the accommodating cavity inside the valve seat 200 into two chambers, and a connecting channel 600 connecting the two chambers is provided on the elastic diaphragm 100, and also includes an exhaust component 700 for exhausting the gas in the second chamber 500; wherein the drip irrigation device includes a capillary tube for conveying water and an emitter for dripping the water in the capillary tube into the soil in the form of water drops.

[0058] Initially, the head end of the capillary tube is connected to the external water supply device, the end of the capillary tube is connected to the water inlet 210 of the flushing valve, and the first chamber 400 and the second chamber 500 of the valve body are filled with air; when drip irrigation is required, the external water supply device supplies water to the capillary tube of the drip irrigation device, and the water in the capillary tube flushes the inner wall of the capillary tube during the process of flowing through the capillary tube, and carries away the impurities in the capillary tube. The water flowing to the end of the capillary tube flows into the first chamber 400 through the water inlet 210 and is discharged through the drain outlet 220, thereby realizing the flushing of the drip irrigation device with water. Among them, after the water flows into the first chamber 400, under the action of water pressure, some water flows into the second chamber 500 through the connecting channel 600. The exhaust component 700 is in an open state at this time. As the amount of water in the second chamber 500 increases, the gas in the second chamber 500 is squeezed by the water and discharged through the exhaust component 700 until the second chamber 500 is full of water and the exhaust component 700 is closed; since the water in the first chamber 400 is continuously discharged through the drain port 220, the internal pressure is relatively small. At the same time, the water in the first chamber 400 can continuously supply water to the second chamber 500. As the amount of water in the second chamber 500 increases, the first chamber 400 and the second chamber 500 are connected. The pressure difference between the two chambers 500 gradually increases, and the pressure of the water in the second chamber 500 pressing the elastic diaphragm 100 in the direction of the first chamber 400 also gradually increases. The elastic diaphragm 100 correspondingly deforms in the direction of the water inlet 210 until the water inlet 210 is blocked. At this time, the water flow at the end of the capillary tube cannot flow into the first chamber 400, and can be connected with the second chamber 500 through the connecting channel 600, providing water pressure for the second chamber 500 to keep it in a dynamic equilibrium state, ensuring the pressure of the water in the second chamber 500 on the elastic diaphragm 100, and the flushing process of the drip irrigation device is completed. The water in the capillary tube drips the soil through the emitter.

[0059] After the drip irrigation is finished, the external water supply device stops supplying water, and the water pressure in the capillary tube decreases. Under the action of the pressure difference and its own gravity, the water in the second chamber 500 can flow back to the first chamber 400 through the connecting channel 600, and the elastic diaphragm 100 returns to its original position accordingly; at this time, the exhaust component 700 is in the open state, and the external air enters the second chamber 500 as the amount of water in the second chamber 500 decreases, and the water in the first chamber 400 is discharged through the drain port 220, thereby realizing a watering process of the drip irrigation device.

[0060] First, the use of the flushing valve can realize automatic flushing and automatic closing of the drip irrigation device for a certain period of time before drip irrigation, thereby greatly reducing the labor consumption, and when the above-mentioned flushing valves are installed at the ends of multiple capillary tubes, the flushing valves can work simultaneously, thereby improving their working efficiency. In addition, the setting of the exhaust component 700 makes it possible for the power source for providing deformation pressure for the elastic diaphragm 100 in the second chamber 500 to be all the water in the second chamber 500. When the elastic diaphragm 100 is deformed to block the water inlet 210, the amount of water in the second chamber 500 is the sum of the initial volume V1 of the second chamber 500 before the elastic diaphragm 100 is deformed and the deformation volume V2 of the elastic diaphragm 100 after the deformation. Compared with the case where the exhaust component 700 is not provided, the air in the second chamber 500 cannot be discharged, and the air and water in the second chamber 500 jointly provide deformation pressure for the elastic diaphragm 100. When the elastic diaphragm 100 is deformed to block the water inlet 210, , the amount of water in the second chamber 500 is approximately equal to the deformation volume V2 of the elastic diaphragm 100 after deformation (the volume of air in the second chamber 500 is the initial volume V1 of the second chamber 500); since the time for the elastic diaphragm 100 to deform and block the water inlet 210 directly determines the effective flushing time of the drip irrigation device, the time for the second chamber 500 of the present application to be filled with water is much longer than when the exhaust assembly 700 is not provided (the filling time of approximately the volume V1 is increased compared to when the exhaust assembly 700 is not provided), thereby effectively extending the flushing time of the drip irrigation device, improving its flushing effect, reducing the probability of blockage of the capillary tube and the emitter, and extending the service life of the drip irrigation device. In addition, when the flushing time is equal, the flushing valve of the present application is smaller in size, occupies less space and has lower processing costs.

[0061] In actual use, taking into account the compression of the gas, when the elastic diaphragm 100 is deformed to block the water inlet 210, the actual amount of water in the second chamber 500 is V3=V1+V2-Z×V1, wherein Z is the gas compression coefficient, and under the environment of 25°C and 0.1MPa, 0.9992<Z<0.9999, i.e. V3≈V2. Therefore, the setting of the exhaust assembly can increase the filling time of the flushing valve by approximately the volume V1, and the drip irrigation device increases the corresponding flushing time accordingly.

[0062] It should be pointed out that the "water" and "air" mentioned herein are only examples of the liquid used in drip irrigation and the gas entering the flushing valve, and are not intended to be limiting. Preferably, when the flushing valve is used, the exhaust assembly 700 can be located at the top position, and the elastic diaphragm 100 can be in an approximately horizontal state (the elastic diaphragm 100 can also be in an inclined state, in which case the connecting channel 600 can be a through hole or other form provided on the elastic diaphragm, and its water inlet end can be provided near the bottom of the elastic diaphragm 100) to ensure that the air and water in the second chamber 500 can be completely discharged, and accordingly ensure that the flushing time of the flushing valve is long enough; Figure 3 and Fig.19 As shown, the water inlet end of the communication channel 600 can be arranged coaxially with the water inlet 210 to ensure the impact of water flow on the communication channel 600.

[0063] Optionally, in this embodiment, if Figure 3 , Fig.12 and Fig.19 As shown, the water inlet 210 can be provided on the valve seat 200, and the valve seat 200 is provided with a second joint 250 connected to the water inlet 210. When the drip irrigation device is used, the end of the capillary tube can be connected to the second joint 250, so as to achieve the connection between the capillary tube and the water inlet 210, so as to improve the convenience of connecting the capillary tube and the valve seat 200. Preferably, as Fig.19 and Fig. 20 As shown, when the exhaust assembly 700 is arranged at the side of the valve cover 300, the second joint 250 can be a straight pipe joint. When in use, the exhaust assembly 700 is located at the top, and the second joint 250 is connected to the capillary pipe laid on the ground; or as shown in FIG. Figure 1-Figure 3 As shown, when the exhaust assembly 700 is disposed at the top cover position of the valve cover 300, the second joint 250 may be an elbow joint to facilitate the orientation and placement of the flushing valve and the connection with the capillary tube.

[0064] Alternatively, if Figure 3 As shown, a reinforcing rib 260 may be connected between the valve seat 200 and the second joint 250. The provision of the reinforcing rib 260 can enhance the connection firmness between the second joint 250 and the valve seat 200, as well as the support strength of the valve seat 200. Specifically, the second joint 250 may be integrally formed with the valve seat 200.

[0065] Optionally, in this embodiment, if Figure 3 and Fig.19As shown, a first joint 310 communicating with the second chamber 500 can be provided on the outer wall of the valve cover 300, and the exhaust assembly 700 includes an exhaust cap 710 and a floating body 720. The exhaust cap 710 is sealed on the first joint 310, and an exhaust cavity 750 is formed between the exhaust cap 710 and the first joint 310. The top wall of the exhaust cap 710 is provided with an exhaust hole 740; the floating body 720 is movably accommodated in the exhaust cavity 750. This is a specific form of the exhaust assembly 700. When the flush valve is not working, or when the water level in the second chamber 500 does not reach the height of the floating body 720, as shown in FIG. Figure 3 and Figure 5 As shown, the floating body 720 is located at the bottom of the exhaust cavity 750 under the action of its own gravity. As the amount of water in the second chamber 500 increases, the air in the second chamber 500 is squeezed into the exhaust cavity 750 and discharged from the exhaust hole 740. When the water level in the second chamber 500 reaches the height of the floating body 720, as the water level continues to increase, as shown in FIG. Figure 7 As shown, the floating body 720 floats up under the buoyancy of the water and floats upward as the water level increases. Figure 8 As shown, until the top of the floating body 720 reaches the exhaust hole 740, and the exhaust hole 740 is blocked, on the basis of exhausting the air in the second chamber 500, the overflow of the water in the second chamber 500 through the exhaust hole 740 is reduced; as the amount of water in the second chamber 500 continues to increase, as shown in FIG. Fig. 9 As shown, the elastic diaphragm 100 is deformed toward the water inlet 210 by the water pressure of the second chamber 500 until the water inlet 210 is blocked, the flushing process is completed, and the drip irrigation device starts drip irrigation and water supply.

[0066] After drip irrigation is completed, Fig.10 As shown, the water in the second chamber 500 is discharged to the first chamber 400 through the connecting channel 600, and the elastic diaphragm 100 gradually returns to its original position; the floating body 720 floats downward as the water level drops, and the floating body 720 no longer blocks the exhaust hole 740. As the water level in the second chamber 500 drops, the outside air can re-enter the second chamber 500 through the exhaust hole 740, thereby completing a water filling process.

[0067] Specifically, the floating body 720 can be configured as a hollow cylinder to improve its floatability; the outer diameter of the cylinder is smaller than the inner diameter of the exhaust cavity 750 to ensure that the floating body 720 can float up and down smoothly in the exhaust cavity 750 .

[0068] Optionally, in this embodiment, if Fig.13As shown, an extension boss 340 can be provided inwardly at a position corresponding to the first joint 310 on the inner wall of the valve cover 300. The extension boss 340 is annular and is provided around the first joint 310. An inner flange is provided at the inner end of the extension boss 340. The provision of the extension boss 340 can increase the volume of the exhaust cavity 750, ensuring that the floating body 720 can float in the exhaust cavity 750 without blocking the exhaust cavity 750. In addition, the inner flange of the extension boss 340 can limit the position of the floating body 720, so as to reduce or even prevent the floating body 720 from falling downward from the exhaust cavity 750, thereby ensuring the normal use of the exhaust assembly 700.

[0069] In addition to the above-mentioned forms, the exhaust component 700 can also be in other forms, such as a solenoid valve structure. The operator can set the switching time of the solenoid valve according to the flushing time of the flushing valve and the drip irrigation time of the drip irrigation device, thereby realizing the automatic operation of the exhaust component 700.

[0070] Optionally, in this embodiment, if Fig.11 and Fig. 20 As shown, a groove 721 can be provided on the top of the floating body 720, and a seal 760 is embedded in the groove 721, and the seal 760 corresponds to the exhaust hole 740. When the floating body 720 floats upward under the buoyancy of the water in the second chamber 500, the seal 760 matches the exhaust hole 740, and the deformation performance of the seal 760 is greater than that of the floating body 720, thereby improving its sealing performance for the exhaust hole 740, and further reducing the occurrence of water overflow in the second chamber 500; specifically, the seal 760 can be a rubber part or a silicone part. Preferably, when the exhaust cavity is approximately cylindrical, the floating body can be cylindrical or spherical to ensure the smoothness of the floating body floating up and down in the exhaust cavity.

[0071] In this embodiment, Figure 3 and Fig.18 As shown, a conical exhaust nozzle 730 can be provided inwardly on the top wall of the exhaust cap 710, and the exhaust hole 740 penetrates the exhaust nozzle 730; the constricted end of the exhaust nozzle 730 faces the floating body 720. The exhaust nozzle 730 forms a bulge inwardly, and the floating body 720 floats upward to abut against the inverted conical exhaust nozzle 730, with a smaller contact area, and the floating body 720 has a greater blocking pressure on the exhaust hole 740, and the blocking and sealing performance is better.

[0072] Optionally, in this embodiment, if Figure 3 and Fig.19As shown, a first clamping groove 230 can be set in the valve seat 200 along its circumference, and a first clamping boss 110 can be set along its circumference at the edge of the elastic diaphragm 100, and the first clamping boss 110 matches the first clamping groove 230; a clamping boss 320 is set in the valve cover 300 along its circumference, and the clamping boss 320 matches and abuts against the side of the elastic diaphragm 100 opposite to the first clamping boss 110; an installation space 322 is reserved between the clamping boss 320 and the side wall of the valve cover 300, the side wall of the valve seat 200 is inserted into the installation space 322, and the valve seat 200 and the side wall of the valve cover 300 are threadedly connected. This is a specific form in which the valve seat 200 and the valve cover 300 are detachably connected, and the elastic diaphragm 100 is installed in the accommodating cavity. During installation, the first clamping boss 110 of the elastic diaphragm 100 is matched and clamped in the first clamping groove 230 of the valve seat 200 to achieve preliminary positioning of the elastic diaphragm 100; then the side wall of the valve seat 200 and the valve cover 300 are threadedly screwed together. During the connection process, the clamping boss 320 is displaced toward the valve seat 200, and finally the elastic diaphragm 100 is clamped. The elastic diaphragm 100 is clamped between the first clamping groove 230 and the clamping boss 320, thereby ensuring the firmness of its installation and reducing the occurrence of the elastic diaphragm 100 falling off when it is subjected to force and deformation.

[0073] In addition, the provision of the first clamping groove 230 and the first clamping boss 110 can also increase the connection area between the elastic diaphragm 100 and the valve seat 200 to improve the connection sealing between the two, and accordingly ensure the relative independence of the first chamber 400 and the second chamber 500 separated by the elastic diaphragm 100.

[0074] Specifically, Fig.19 As shown, when the exhaust assembly 700 is located on the side wall of the valve cover 300, in order to achieve the connection between the second chamber 500 and the first joint 310, a first connecting hole 321 can be set at the position of the side wall of the clamping boss 320 corresponding to the first joint 310, and accordingly, a second connecting hole 270 is set at the position corresponding to the valve seat 200 and the first joint 310; preferably, the apertures of the first connecting hole 321, the second connecting hole 270 and the inner hole of the first joint 310 are approximately equal, and the three hole bodies can be coaxially arranged.

[0075] Optionally, in this embodiment, if Figure 3 and Fig.19As shown, the inner side wall of the first clamping groove 230 can form a second clamping boss 240, and the elastic diaphragm 100 is provided with a second clamping groove 120, and the second clamping groove 120 matches the second clamping boss 240. When the elastic diaphragm 100 and the valve seat 200 are plugged in, the first clamping boss 110 thereof is inserted into the first clamping groove 230 of the valve seat 200, and at the same time, the second clamping boss 240 of the valve seat 200 is inserted into the second clamping groove 120 of the elastic diaphragm 100, and the connection area of ​​the elastic diaphragm 100 and the valve seat 200 and the tortuosity of the connection are greatly improved, thereby further improving the stability and sealing of the connection between the elastic diaphragm 100 and the valve seat 200.

[0076] In this embodiment, Figure 3 and Fig.19 As shown, the flushing valve may also include a flow channel seat 610 and a connector 620 fixedly connected to the flow channel seat 610, the flow channel seat 610 is located in the second chamber 500, and the connector 620 passes through the elastic diaphragm 100; the connecting channel 600 includes a water inlet section 630 and a maze-shaped extension section 640, the water inlet section 630 is arranged in the connector 620, and the extension section 640 is arranged in the flow channel seat 610, the water inlet end of the water inlet section 630 is connected to the first chamber 400, the water outlet end of the water inlet section 630 is connected to the water inlet end of the extension section 640, and the water outlet end of the extension section 640 is connected to the second chamber 500. Here is a specific form of the connecting channel 600. During the flushing process, the water in the first chamber 400 flows into the water inlet section 630, and then flows into the labyrinth-shaped extension section 640. Due to the high tortuosity of the extension section 640, the water flows through the extension section 640, and the extension section 640 continuously dissipates the energy of the water flow to reduce its water flow velocity. In addition, the flow channel length of the extension section 640 is long, so it takes a long time for the water in the first chamber 400 to flow into the second chamber 500 through the extension section 640; then the first chamber 400 continues to fill the second chamber 500 with water until the air in the second chamber 500 is completely discharged, the floating body blocks the exhaust hole, and the elastic diaphragm 100 deforms to block the water inlet 210, and the flushing process ends. The setting of the flow channel seat 610 and the labyrinth-shaped extension section 640 therein can effectively increase the time for the water in the first chamber 400 to flow into the second chamber 500, thereby further extending the flushing time of the drip irrigation device and correspondingly improving the flushing effect of the flushing valve.

[0077] Specifically, the extension section 640 may be a three-dimensional flow channel that is interspersed and distributed in a forward and reverse direction along multiple directions, so as to fully utilize the space in the flow channel seat 610 and reduce the space occupied by the flow channel seat 610 in the second chamber 500.

[0078] Specifically, in this embodiment, Fig.17As shown, radially arranged clamping plates can be provided at the outer end of the connecting head 620. When connecting, the clamping plates are forced through the deformed and expanded connecting holes 150 on the elastic diaphragm 100, and then the connecting holes 150 return to their original shape and are tightly fitted on the portion of the connecting head 620 between the clamping plates and the flow channel seat 610, thereby realizing a detachable fixed connection between the flow channel seat 610 and the elastic diaphragm. Specifically, there can be four clamping plates, which are evenly spaced along the circumference of the connecting head 620 to form a cross clamping joint 621.

[0079] Optionally, in this embodiment, if Fig.21 As shown, the flow channel seat 610 may include a plurality of spliced ​​seat bodies, wherein the first splicing wall and the second splicing wall of two adjacent seat bodies are used to form a splicing surface, and the extension section 640 extends to one or more splicing surfaces, and the extension section 640 is formed by splicing the first groove body 641 arranged in the first splicing wall in the splicing surface and the second splicing wall. Compared with directly opening a tortuous extension section 640 inside an independent individual flow channel seat 610, the flow channel seat 610 of the present application is formed by splicing a plurality of seat bodies, and the first groove body 641 forming the extension section 640 is arranged on the first splicing wall of the splicing surface of the seat body. On the one hand, during processing, the first groove body 641 can be opened on the first splicing wall of the seat body, and then a plurality of seat bodies are spliced ​​to form a flow channel seat 610 with a labyrinth-shaped extension section 640 inside, which greatly improves the processing convenience and greatly reduces the corresponding processing cost; on the other hand, when the extension section 640 is blocked, the flow channel seat 610 can be disassembled and the exposed first groove body 641 can be directly cleaned, which is more convenient for maintenance and thus improves the convenience of use of the flow channel seat 610. Specifically, the extension section can be entirely arranged on one of the splicing surfaces, or it can be composed of channel sections arranged on different splicing surfaces.

[0080] In addition to the above-mentioned form, the extension section 640 can also be formed by splicing a first slot body 641 arranged on the first splicing wall and a second slot body of the second splicing wall.

[0081] Optionally, in this embodiment, if Fig.17 As shown, the flow channel seat 610 can be a cylinder, the seat body is a fan-shaped body, and a plurality of seat bodies are arranged along the circumference of the flow channel seat 610; the flushing valve can also include a cylindrical ferrule 650, and the ferrule 650 is detachably mounted on the flow channel seat 610. This is a specific form of the flow channel seat 610. After the flow channel seat 610 is spliced, a cylinder is formed. The cylinder is inserted into the cylindrical ferrule 650, and the ferrule 650 limits the circumferential positions of the plurality of seat bodies to improve the integrity and structural stability of the flow channel seat 610; specifically, an external thread can be provided on the outer wall of the flow channel seat 610, and an internal thread can be provided on the inner wall of the ferrule 650, and the flow channel seat 610 is threadedly connected to the ferrule 650. Specifically, as Fig.21As shown, the flow channel seat 610 is spliced ​​together by four fan-shaped seat bodies, the four seat bodies are respectively a first seat body 611, a second seat body 612, a third seat body 613 and a fourth seat body 614, and the connector 620 is arranged at the end of the fourth seat body 614.

[0082] Specifically, Fig.21 As shown, a cross-convex transverse portion 642 and a vertical portion 643 can be provided on the joint wall of the seat body, and the two serve as the side of the trough body to separate the trough body into a tortuous flow channel, thereby effectively dissipating energy for the water flow.

[0083] In this embodiment, Figure 3-Figure 10 as well as Figure 14-16 As shown, a drain hole 130 may be provided at a position corresponding to the elastic diaphragm 100 and the water inlet 210, and a lip 140 may be provided on the side wall of the elastic diaphragm 100 located in the first chamber 400, and there is a gap between the lip 140 and the elastic diaphragm 100, and the lip 140 may cover the drain hole 130. When the flush valve is not working, as shown in FIG. Figure 3 and Figure 4 As shown, the lip and the elastic diaphragm remain in their original state; after the drip irrigation device is turned on, the water in the capillary tube flows into the first chamber 400 through the water inlet 210 at a certain flow rate, and impacts and presses the lip 140 toward the water inlet 210, as shown in FIG. Figure 5 and Figure 6 As shown, the lip 140 deforms inwardly to fit the elastic diaphragm 100 and blocks the drainage hole 130. The water in the first chamber 400 flows into the second chamber 500 through the connecting channel 600. The air in the second chamber is discharged through the exhaust hole. When the water level in the second chamber is lower than the floating body, Figure 3 and Figure 5 As shown, the floating body is located at the bottom of the exhaust chamber. When the water level in the second chamber is higher than the floating body, as shown in FIG. Figure 7 As shown, the floating body floats upward with the water level in the second chamber. Figure 8 As shown, until the floating body blocks the exhaust hole, the exhaust process ends; the first chamber continues to supply water to the second chamber, as shown in FIG. Fig. 9 As shown, the water pressure in the second chamber compresses the elastic diaphragm to deform and block the water inlet, and the flushing process ends.

[0084] After the flushing process is completed, during the drip irrigation water supply process, such as Fig. 9 As shown, the water pressure in the capillary tube can continuously impact the flap 140 to block the drainage hole 130. Accordingly, the water pressure in the second chamber 500 continuously presses the elastic diaphragm 100 to block the water inlet 210, thereby ensuring the normal drip irrigation process. After the drip irrigation is completed, the water pressure in the capillary tube decreases, as shown in FIG. Fig.10As shown, the lip 140 returns to its original position under the action of its own deformation restoring force, and no longer blocks the drain hole 130. The water in the second chamber 500 can be quickly and thoroughly discharged to the first chamber 400 through the drain hole 130, and finally discharged through the drain port 220. The floating body drops to its original position with the water level, and the external air enters the second chamber through the exhaust hole, thereby ensuring the flushing time of the flush valve when it is used next time, reducing the height limit of the water outlet end of the extension section 640 in the flow channel seat 610, resulting in the water in the second chamber 500 cannot be completely discharged through the connecting channel 600, thereby affecting the flushing time of the flush valve when it is used next time. In addition, the tiny particles (silt, etc.) that enter the second chamber 500 through the flow channel seat 610 can also flow out of the drain hole 130 with the water flow, thereby reducing the accumulation of silt in the second chamber 500 after the flush valve is used multiple times, affecting the normal use of the flush valve.

[0085] Preferably, if Figure 3 As shown, when the flushing valve is in use, it can be ensured that the elastic diaphragm 100 is placed approximately horizontally and the exhaust assembly 700 is located at the top of the flushing valve; in addition, it can also be arranged as follows: when the flushing valve is in use, the exhaust assembly 700 is located at the top of the flushing valve, the elastic diaphragm 100 is inclined or vertically arranged, and the drainage hole 130 is located in the bottom area of ​​the elastic diaphragm 100.

[0086] In this embodiment, Figure 3 As shown, a support member 660 may be provided between the end surface of the flow channel seat 610 facing the elastic diaphragm 100 and the elastic diaphragm 100 to ensure that the flow channel seat 610 does not block the drainage hole 130 on the elastic diaphragm 100 , thereby ensuring the drainage of water in the second chamber 500 .

[0087] Specifically, in this embodiment, Fig.15 As shown, the water inlet end of the communication channel 600 is coaxial with the water inlet 210, and there are multiple drainage holes 130, which are arranged at intervals along the circumference of the water inlet end of the communication channel 600; Fig.16 As shown, the flap 140 is annular, and the flap 140 is arranged around the water inlet end of the communication channel 600. The annular flap 140 can block multiple drainage holes 130 at the same time under the action of water pressure, and multiple drainage holes 130 are conducive to the complete drainage of water in the second chamber 500. When a single drainage hole 130 is blocked, other drainage holes 130 can still drain water.

[0088] In this embodiment, Fig.19 and Fig. 20As shown, a support boss 330 can be provided at a position where the inner wall of the valve cover 300 is opposite to the connector 620. The support boss 330 includes a plurality of arc-shaped protrusions 331, which are distributed in a ring shape, and gaps are left between adjacent arc-shaped protrusions 331. The outlet end of the extension section 640 is located at the end face of the flow channel seat 610 away from the elastic diaphragm 100. When the drip irrigation device starts to work, the water flow in the capillary impacts the elastic diaphragm 100 and deforms in the direction of the second chamber 500. Accordingly, the flow channel seat 610 moves toward the valve cover 300 with the elastic diaphragm 100 until the flow channel seat 610 abuts against the support boss 330. The provision of the support boss 330 can ensure that the outlet end of the flow channel seat 610 is provided. There is a gap between the end face and the valve cover 300, and water flowing out of the water outlet end (the support boss 330 is at a different position from the water outlet end or the support boss 330 does not completely block the water outlet end) can flow into the second chamber 500 through the gap between the arc-shaped protrusions 331, thereby reducing the elastic diaphragm 100 being driven by the water pressure in the capillary to drive the flow channel seat 610 to move. The water outlet on the flow channel seat 610 is blocked by the valve cover 300, resulting in the inability to supply water to the second chamber 500.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flush valve, characterized in that: The invention comprises a valve body and an elastic diaphragm (100), wherein the valve body comprises a valve seat (200) and a valve cover (300) detachably fixed to the valve seat (200), wherein a receiving cavity is formed between the valve cover (300) and the valve seat (200), wherein the elastic diaphragm (100) is arranged in the receiving cavity, and wherein the elastic diaphragm (100) divides the receiving cavity into a first chamber (400) and a second chamber (500), wherein the elastic diaphragm (100) is arranged There is a communication channel (600) connecting the first chamber (400) and the second chamber (500); the side wall of the valve body corresponding to the first chamber (400) is provided with a water inlet (210) for communicating with the capillary tube and a water outlet (220) for draining water; the elastic diaphragm (100) is capable of blocking the water inlet (210) when deformed under pressure, and the water inlet end of the communication channel (600) corresponds to the water inlet (210); The side wall of the valve body corresponding to the second chamber (500) is provided with an exhaust component (700), and the exhaust component (700) is used to exhaust the gas in the second chamber (500); The outer wall of the valve cover (300) is provided with a first joint (310) communicating with the second chamber (500); the exhaust assembly (700) comprises an exhaust cap (710) and a floating body (720); the exhaust cap (710) is sealed on the first joint (310), and an exhaust cavity (750) is formed between the exhaust cap (710) and the first joint (310); the top wall of the exhaust cap (710) is provided with an exhaust hole (740); the floating body (720) is movably accommodated in the exhaust cavity (750); A first clamping groove (230) is provided in the valve seat (200) along its circumference, and a first clamping boss (110) is provided on the edge of the elastic diaphragm (100) along its circumference, and the first clamping boss (110) matches the first clamping groove (230); a clamping boss (320) is provided in the valve cover (300) along its circumference, and the clamping boss (320) matches and abuts against a side of the elastic diaphragm (100) opposite to the first clamping boss (110); An installation space (322) is reserved between the pressing boss (320) and the side wall of the valve cover (300), the side wall of the valve seat (200) is inserted into the installation space (322), and the valve seat (200) and the side wall of the valve cover (300) are threadedly connected; The flushing valve further comprises a flow channel seat (610) and a connector (620) fixedly connected to the flow channel seat (610), wherein the flow channel seat (610) is located in the second chamber (500), and the connector (620) passes through the elastic diaphragm (100); the connecting channel (600) comprises a water inlet section (630) and a labyrinth-shaped extension section (640), wherein the water inlet section (630) is arranged in the connector (620), and the extension section (640) is arranged in the flow channel seat (610), the water inlet end of the water inlet section (630) is in communication with the first chamber (400), the water outlet end of the water inlet section (630) is in communication with the water inlet end of the extension section (640), and the water outlet end of the extension section (640) is in communication with the second chamber (500); The flow channel seat (610) comprises a plurality of seat bodies that are spliced ​​together, wherein a first splicing wall and a second splicing wall of two adjacent seat bodies are used to splice together to form a splicing surface, the extension section (640) extends to one or more of the splicing surfaces, and the extension section (640) is formed by splicing a first groove body (641) provided on the first splicing wall and the second splicing wall in the splicing surface; Alternatively, the extension section (640) is formed by splicing a first groove body (641) of a first splicing wall and a second groove body of a second splicing wall provided in the splicing surface; The flow channel seat (610) is a cylinder, the seat body is a fan-shaped body, and a plurality of the seat bodies are arranged along the circumference of the flow channel seat (610); the flushing valve also includes a cylindrical ferrule (650), and the ferrule (650) is detachably mounted on the flow channel seat (610).

2. The flush valve according to claim 1, characterized in that The top of the floating body (720) is provided with an embedding groove (721), a sealing member (760) is embedded in the embedding groove (721), and the sealing member (760) corresponds to the exhaust hole (740); And / or, a conical exhaust nozzle (730) is provided inwardly on the top wall of the exhaust cap (710), and the exhaust hole (740) passes through the exhaust nozzle (730); the constricted end of the exhaust nozzle (730) faces the floating body (720).

3. The flush valve according to claim 1, characterized in that: A drainage hole (130) is provided at a position corresponding to the elastic diaphragm (100) and the water inlet (210); a lip (140) is provided on the side wall of the elastic diaphragm (100) located in the first chamber (400); a gap exists between the lip (140) and the elastic diaphragm (100), and the lip (140) can cover the drainage hole (130).

4. The flush valve according to claim 1, characterized in that A supporting boss (330) is provided at a position of the inner wall of the valve cover (300) opposite to the connecting head (620), and the supporting boss (330) includes a plurality of arc-shaped protrusions (331). The plurality of arc-shaped protrusions (331) are distributed in a ring shape, and gaps are left between adjacent arc-shaped protrusions (331).

5. A drip irrigation device, characterized in that: It comprises a capillary tube, an emitter and the flushing valve according to any one of claims 1 to 4, wherein the emitter is arranged on the capillary tube, and the end of the capillary tube is connected to the water inlet (210) of the flushing valve.

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