A stable constant flow valve for irrigation

Abstract

The present invention relates to the technical field of constant flow valves, and in particular to a stable constant flow valve for irrigation. It comprises: a valve body, the valve body is provided with a control terminal, the valve body has an inlet side and an outlet side, the inlet side is provided with a pressure sensor, and the pressure sensor is electrically connected to the control terminal; an electric push rod, fixedly connected to the valve body, the electric push rod is electrically connected to the control terminal, and the telescopic end of the electric push rod is fixedly connected to a plugging cover; an elastic ring, fixedly connected to the valve body, and the elastic ring and the plugging cover squeeze each other. The present invention monitors the water pressure on the water inlet side through a pressure sensor, and when the water pressure fluctuates, the electric push rod adjusts the position of the plugging cover, thereby adjusting the flow on the water outlet side to provide a stable water flow, and when the valve is opened, the elastic ring is retracted into the side wall of the valve body, thereby reducing the impact of the water flow on the elastic ring, so as to reduce the wear of the elastic ring and extend the service life of the elastic ring.

Description

Technical Field

[0001] The invention relates to the technical field of constant flow valves, and in particular to a stable constant flow valve for irrigation. Background Art

[0002] A constant flow valve (constant flow regulating valve) is a self-acting valve that combines differential pressure control with flow regulation. Its core principle is to adjust the valve opening or structural design so that the fluid maintains a constant flow rate when the pressure fluctuates. When the differential pressure before and after the valve exceeds the starting value, the flow rate is no longer affected by the pressure difference change, and flow control can be achieved only by adjusting the valve opening. One type of constant flow valve is an actuator-controlled type. Its principle is to adjust the valve opening through an electric or pneumatic actuator to achieve a constant flow rate, and it is often used in conjunction with a sensor to achieve closed-loop control.

[0003] The existing actuator-controlled constant flow valve needs to rely on seals to ensure sealing when it is closed. However, in long-term use, the continuous impact of water flow on the seals will cause increased wear and tear, shortening its service life. Summary of the invention

[0004] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a stable constant flow valve for irrigation.

[0005] The technical solution is: a stable constant flow valve for irrigation, including: A valve body, wherein the valve body is provided with a control terminal, the valve body has a water inlet side and a water outlet side, the water inlet side is provided with a pressure sensor, and the pressure sensor is electrically connected to the control terminal; An electric push rod is fixedly connected to the valve body, the electric push rod is electrically connected to the control terminal, and a sealing cover is fixedly connected to the telescopic end of the electric push rod; The elastic ring is fixedly connected to the valve body, and the elastic ring and the blocking cover are pressed against each other.

[0006] Furthermore, it also includes: A first sliding block, the valve body is provided with a first sliding groove, the first sliding block is slidably connected to the first sliding groove, the elastic ring is provided with a chamber, and the first sliding groove is communicated with the chamber of the elastic ring.

[0007] Furthermore, it also includes: The extrusion rod is fixedly connected to the blocking cover, and the extrusion rod and the first sliding block are mutually extruded.

[0008] Furthermore, it also includes: A pressure piece, the valve body is provided with a sewage discharge side, the pressure piece is arranged on the sewage discharge side, the valve body is provided with slots evenly distributed in the circumferential direction, the pressure piece is slidably connected to the slots, the valve body is provided with a sewage discharge slot, and the pressure piece is slidably connected to a slide rod; The blocking member is fixedly connected to the sliding rod, a first spring is arranged between the blocking member and the pressurizing member, and the blocking member is slidably connected to the valve body.

[0009] Furthermore, the middle portion of the blocking member is protruding upwards to assist in the discharge of impurities.

[0010] Furthermore, the card slot is provided with the protrusion, and the protrusion is used to block the pressure member.

[0011] Furthermore, it also includes: A limiting member, wherein the valve body is provided with a second sliding groove, the limiting member is slidably connected to the second sliding groove, and the limiting member is used to limit the blocking member.

[0012] Furthermore, it also includes: A sliding member, the valve body is provided with a third sliding groove, the sliding member is slidably connected to the third sliding groove, a second spring is provided between the sliding member and the valve body, and the third sliding groove is communicated with the second sliding groove; The spring telescopic rod is fixedly connected to the extrusion rod, and the telescopic end of the spring telescopic rod and the sliding member are mutually extruded.

[0013] Furthermore, it also includes: A sliding rod, the valve body is provided with a fourth sliding groove, the sliding rod is slidably connected to the fourth sliding groove, and the sliding rod and the blocking member are pressed against each other.

[0014] Furthermore, it also includes: The second slider is provided with a fifth slide groove on the valve body, the second slider is slidably connected to the fifth slide groove, the second slider and the extrusion rod are mutually extruded, and the fifth slide groove is connected to the fourth slide groove.

[0015] Beneficial effects of the present invention: The present invention monitors the water pressure on the water inlet side through a pressure sensor, and when the water pressure fluctuates, the electric push rod adjusts the position of the sealing cover, thereby adjusting the flow on the water outlet side to provide a stable water flow, and when the valve is opened, the elastic ring is retracted into the side wall of the valve body, thereby reducing the impact of the water flow on the elastic ring, thereby reducing the wear of the elastic ring and extending the service life of the elastic ring.

[0016] By allowing impurities in the water to fall into the sewage discharge side, the plugging piece moves downward when the valve is closed, thereby discharging the impurities, preventing the impurities from accumulating in the water pipe and clogging it, and using the impact of the water flow to assist in discharging impurities on the plugging piece, thereby improving cleaning efficiency.

[0017] The blocking member is limited by the limiting member, thereby preventing the blocking member from moving downward when the device is working normally, thereby ensuring the normal operation of the device.

[0018] When the water pressure in the valve body increases, the water pressure is used to push the sliding part to move and transmit the limit part to release the limit on the blocking part, so that the blocking part is opened and the pressure in the irrigation system is released to prevent the parts in the system from being damaged due to excessive water pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the card slot and the protrusion of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the sealing cover and the elastic ring of the present invention; Figure 4 It is a three-dimensional structural cross-sectional view of the pressurizing member and the blocking member of the present invention.

[0020] Figure numbers: 1-valve body, 101-water inlet side, 102-water outlet side, 103-first slide, 104-drain side, 105-slot, 1051-bump, 106-drain chute, 107-second slide, 108-third slide, 109-fourth slide, 110-fifth slide, 2-control terminal, 3-electric push rod, 4-sealing cover, 5-elastic ring, 6-first slider, 7-extrusion rod, 8-pressure member, 9-slide rod, 10-sealing member, 11-limiting member, 12-sliding member, 13-spring telescopic rod, 14-sliding rod, 15-second slider. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0022] A stable constant flow valve for irrigation, such as Figure 1 and Figure 3 As shown, it includes a valve body 1, the valve body 1 is provided with a control terminal 2, the valve body 1 has a water inlet side 101 and a water outlet side 102, the water inlet side 101 is provided with a pressure sensor, and the pressure sensor is electrically connected to the control terminal 2; an electric push rod 3 is fixedly connected in the valve body 1, the electric push rod 3 is electrically connected to the control terminal 2, and the telescopic end of the electric push rod 3 is fixedly connected to a sealing cover 4; an elastic ring 5 is fixedly connected in the valve body 1, and the elastic ring 5 and the sealing cover 4 are pressed against each other.

[0023] Further, such as Figure 4As shown, it also includes: a first slider 6, the valve body 1 is provided with a first slide groove 103, the first slider 6 is slidably connected to the first slide groove 103, the elastic ring 5 is provided with a chamber, and the first slide groove 103 is connected to the chamber of the elastic ring 5.

[0024] Further, such as Figure 4 As shown, it also includes: an extrusion rod 7, which is fixed to the blocking cover 4, and the extrusion rod 7 and the first sliding block 6 are pressed against each other.

[0025] In the above scheme, the state of the elastic ring 5 is adjusted to extend its service life while ensuring the sealing performance. The pressure sensor on the water inlet side 101 is used to monitor the water pressure on the water inlet side 101, so as to adjust the distance between the plugging cover 4 and the elastic ring 5 according to the water pressure on the water inlet side 101, so as to control the water flow through the device. The electric push rod 3 is used to adjust the position of the plugging cover 4 to control the opening and closing of the device and the size of the water flow. The right side of the plugging cover 4 is a spherical surface, and the inner wall of the valve body 1 is also a spherical surface. The diameter of the spherical surface of the plugging cover 4 is the same as the diameter of the inner wall of the valve body 1, which is used to make the plugging cover 4 and the valve body 1 close to each other. The sealing performance is ensured, and at the same time, the blocking cover 4 guides the impacting water flow, weakens the impact force of the water flow on the blocking cover 4, thereby reducing the vibration caused by the water flow impacting the blocking cover 4. The elastic ring 5 is embedded in the side wall of the valve body 1, and a seal is arranged between the first slider 6 and the valve body 1. The first slide groove 103 and the elastic ring 5 are filled with a liquid for transmission, such as hydraulic oil. A filtering device can be arranged on the right side of the valve body 1 to filter impurities in the water, thereby preventing the water outlet in the irrigation system from being blocked.

[0026] Working process: When using this device, connect the water inlet side 101 with the water supply pipe, connect the water outlet side 102 with the water pipe, and then water flows into the valve body 1 from the water inlet side 101, and then flows out from the water outlet side 102, so as to irrigate the land. Taking the excessive water pressure on the water outlet side 102 as an example, when the pressure sensor detects that the water pressure on the water outlet side 102 is too high, the pressure sensor transmits the pressure information to the control terminal 2, and then the control terminal 2 controls the electric push rod 3 to start, the electric push rod 3 extends and drives the blocking cover 4 to move, and the blocking cover 4 moves to the right, shortening the distance between it and the water inlet side 101, so that the cross-sectional area that the water flow can pass through is reduced, thereby reducing the amount of water entering the water outlet side 102, and then maintaining the stability of the flow on the water outlet side 102 to achieve the purpose of constant flow.

[0027] When watering is stopped, the control terminal 2 controls the electric push rod 3 to extend, and the telescopic end of the electric push rod 3 drives the blocking cover 4 to move to the right, so that the blocking cover 4 moves to the right to block the water inlet side 101. When the blocking cover 4 moves, the blocking cover 4 drives the extrusion rod 7 to move. When the extrusion rod 7 contacts the first slider 6, the extrusion rod 7 pushes the first slider 6 to move, and the first slider 6 moves to the right and presses the liquid in the first slide groove 103 into the elastic ring 5 to expand the elastic ring 5, thereby increasing the pressure between the elastic ring 5 and the blocking cover 4 to ensure the sealing performance. When the blocking cover 4 moves to the left, the elastic ring 5 retracts into the side wall of the valve body 1 under the action of its own elasticity, thereby reducing the impact of water flow on the elastic ring 5, so as to reduce the wear of the elastic ring 5 and extend the service life of the elastic ring 5.

[0028] Further, such as Figure 2-Figure 4 As shown, it also includes: a pressure member 8, a valve body 1 is provided with a sewage discharge side 104, the pressure member 8 is arranged on the sewage discharge side 104, the valve body 1 is provided with a circumferentially uniformly distributed groove 105, the pressure member 8 is slidably connected to the groove 105, the valve body 1 is provided with a sewage discharge groove 106, and the pressure member 8 is slidably connected to the slide bar 9; a blocking member 10 is fixed to the slide bar 9, a first spring is arranged between the blocking member 10 and the pressure member 8, and the blocking member 10 is slidably connected to the valve body 1. The middle part of the blocking member 10 protrudes upward to assist in the discharge of impurities. The groove 105 is provided with a protrusion 1051, and the protrusion 1051 is used to block the pressure member 8.

[0029] The above scheme aims to discharge impurities in the pipeline to prevent the impurities in the water from accumulating in the water pipe, and to achieve rapid disassembly and assembly of the pressurizing member 8 to shorten the time used for inspection and maintenance of the device. The pressure piece 8 is composed of a disc part, a cylindrical part and a prism part. The prism part is acted on by a tool such as a wrench to apply force to the pressure piece 8, so as to install the pressure piece 8. The cylindrical part of the pressure piece 8 and the groove 105 are squeezed against each other. A sealing member is provided between the sealing member 10 and the valve body 1 to prevent water leakage. When installing the pressure piece 8, the cylindrical part of the pressure piece 8 slides into the groove 105, and the pressure piece 8 drives the sliding rod 9 and the sealing member 10 to enter the valve body 1. The sealing member 10 is blocked by the valve body 1. The pressure piece 8 pressurizes the first spring adjacent to it to make the sealing member 10 close to the valve body 1. When the cylindrical part of the pressure piece 8 passes over the protrusion 1051, the installation of the pressure piece 8 is completed. The initial elastic force of the first spring on the sealing member 10 is greater than the pressure of the water pressure in the device on the sealing member 10 to prevent the sealing member 10 from opening when the device is working normally.

[0030] Further, such as Figure 4 As shown, it also includes: a limiting member 11, the valve body 1 is provided with a second sliding groove 107, the limiting member 11 is slidably connected to the second sliding groove 107, and the limiting member 11 is used to limit the blocking member 10.

[0031] In the above solution, the blocking member 10 is limited to prevent the blocking member 10 from moving downward. The limiting member 11 is used to prevent the blocking member 10 from moving downward when the water pressure in the device fluctuates. A sealing member is provided between the limiting member 11 and the valve body 1.

[0032] Further, such as Figure 4 As shown, it also includes: a sliding member 12, the valve body 1 is provided with a third sliding groove 108, the sliding member 12 is slidably connected to the third sliding groove 108, a second spring is provided between the sliding member 12 and the valve body 1, and the third sliding groove 108 is connected to the second sliding groove 107; a spring telescopic rod 13 is fixed to the extrusion rod 7, and the telescopic end of the spring telescopic rod 13 and the sliding member 12 are squeezed against each other.

[0033] In the above scheme, it is intended to provide power for the movement of the limiter 11. The third slide groove 108 and the second slide groove 107 are both filled with liquid for transmission, a seal is provided between the sliding member 12 and the valve body 1, and the elastic coefficient of the spring in the spring telescopic rod 13 is greater than the elastic coefficient of the second spring between the sliding member 12 and the valve body 1, so that the spring telescopic rod 13 pushes the sliding member 12 to move to the limit position and then shortens, and the initial elastic force of the second spring on the sliding member 12 is greater than the pressure of the water pressure on the sliding member 12 when the device is working normally. When the water pressure in the device is too high, the sliding member 12 can be pushed to overcome the elastic force of the second spring and move to the right.

[0034] Further, such as Figure 4 As shown, it also includes: a sliding rod 14, the valve body 1 is provided with a fourth sliding groove 109, the sliding rod 14 is slidably connected to the fourth sliding groove 109, and the sliding rod 14 and the blocking member 10 are pressed against each other.

[0035] Further, such as Figure 4 As shown, it also includes: a second slider 15, the valve body 1 is provided with a fifth slide groove 110, the second slider 15 is slidably connected to the fifth slide groove 110, the second slider 15 and the extrusion rod 7 are squeezed against each other, and the fifth slide groove 110 is connected to the fourth slide groove 109.

[0036] In the above scheme, the purpose is to push the blocking member 10 downward to discharge the impurities thereon. The fourth chute 109 and the fifth chute 110 are filled with liquid for transmission, and sealing members are arranged between the sliding rod 14 and the second slider 15 and the valve body 1. The distance between the second slider 15 and the extrusion rod 7 is greater than the distance between the telescopic end of the spring telescopic rod 13 and the sliding member 12, so that the spring telescopic rod 13 first pushes the sliding member 12 to move, and then the extrusion rod 7 pushes the second slider 15 to move. When the blocking member 10 is opened, there is still a certain distance between the blocking cover 4 and the elastic ring 5. The diameter of the second slider 15 is smaller than the diameter of the sliding member 12, so that under the same water pressure, the pressure on the sliding member 12 is greater than the pressure on the second slider 15. The surface of the limiter 11 is smooth, which is used to reduce the friction between the limiter 11 and the blocking member 10, so that when the water pressure in the valve body 1 is too high, the movement of the limiter 11 is not hindered.

[0037] Working process: when water flows into the valve body 1 from the water inlet side 101, some impurities in the water fall into the sewage discharge side 104, thereby preventing impurities from accumulating in the water pipe and causing blockage. When the blocking cover 4 moves to the right after irrigation, the blocking cover 4 drives the extrusion rod 7 to move, and the extrusion rod 7 drives the spring telescopic rod 13 to move. The spring telescopic rod 13 contacts the sliding member 12 and pushes the sliding member 12 to move to the right. The sliding member 12 compresses the adjacent second spring and draws the liquid in the second chute 107 into the third chute 108. The liquid in the second chute 107 is reduced to form a negative pressure, so that the limit member 11 moves to the right and releases the limit on the blocking member 10. After the limit member 11 releases the limit on the blocking member 10 (at this time the sliding member 12 moves to the limit position, the extrusion rod 7 contacts the second sliding block 15), the extrusion rod 7 pushes the second sliding block 15 to move, and the spring The telescopic rod 13 is compressed, the second sliding block 15 moves to the right and presses the liquid in the fifth slide groove 110 into the fourth slide groove 109. The liquid in the fourth slide groove 109 increases, pushing the sliding rod 14 to move downward, and the sliding rod 14 pushes the blocking member 10 to move downward. The blocking member 10 drives the sliding rod 9 to move and compresses the adjacent first spring until the upper side of the blocking member 10 is lower than the upper side of the drain trough 106. At this time, the gap between the blocking cover 4 and the water inlet side 101 is small, so the flow rate of water flowing out of the gap is faster, and the water flows along the inner wall of the valve body 1 into the drain side 104, and rushes to the upper side of the blocking member 10, thereby rushing the impurities accumulated on the blocking member 10 to the drain trough 106, and then discharging the impurities, thereby achieving preliminary impurity removal, extending the service life of the subsequent filtering device, reducing the frequency of overhaul and maintenance of the irrigation system, and reducing the cost of use.

[0038] When the water outlets in the irrigation system are clogged too much, the water pressure in the valve body 1 increases, pushing the sliding member 12 to move rightward, and the sliding member 12 drives the limit member 11 to move rightward. Then the water pressure drives the blocking member 10 to move downward, thereby relieving the pressure in the irrigation system to prevent the parts in the system from being damaged due to excessive water pressure. When the water pressure returns to normal, the blocking member 10 is reset under the action of the adjacent first spring. After the blocking member 10 is reset, the sliding member 12 is reset under the action of the adjacent second spring and drives the limit member 11 to reset.

[0039] The present invention provides a thought and method. There are many methods and ways to implement the technical solution. The above is only the preferred implementation mode of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A stable constant flow valve for irrigation, characterized in that: Included are: A valve body (1), the valve body (1) being provided with a control terminal (2), the valve body (1) having a water inlet side (101) and a water outlet side (102), the water inlet side (101) being provided with a pressure sensor, the pressure sensor being electrically connected to the control terminal (2); An electric push rod (3) is fixedly connected in the valve body (1), the electric push rod (3) is electrically connected to the control terminal (2), and a sealing cover (4) is fixedly connected to the telescopic end of the electric push rod (3); An elastic ring (5) is fixedly connected to the valve body (1), and the elastic ring (5) and the blocking cover (4) are pressed against each other.

2. A stable constant flow valve for irrigation according to claim 1, characterized in that: Also included are: A first sliding block (6), the valve body (1) is provided with a first sliding groove (103), the first sliding block (6) is slidably connected to the first sliding groove (103), the elastic ring (5) is provided with a chamber, and the first sliding groove (103) is communicated with the chamber of the elastic ring (5).

3. A stable constant flow valve for irrigation according to claim 2, characterized in that: Also included are: The extrusion rod (7) is fixedly connected to the blocking cover (4), and the extrusion rod (7) and the first sliding block (6) are mutually extruded.

4. A stable constant flow valve for irrigation according to claim 3, characterized in that: Also included are: A pressure piece (8), the valve body (1) is provided with a sewage discharge side (104), the pressure piece (8) is arranged on the sewage discharge side (104), the valve body (1) is provided with circumferentially evenly distributed grooves (105), the pressure piece (8) is slidably connected to the grooves (105), the valve body (1) is provided with a sewage discharge groove (106), and the pressure piece (8) is slidably connected to a slide rod (9); The blocking member (10) is fixedly connected to the sliding rod (9), a first spring is provided between the blocking member (10) and the pressurizing member (8), and the blocking member (10) is slidably connected to the valve body (1).

5. A stable constant flow valve for irrigation according to claim 4, characterized in that: The middle part of the blocking piece (10) protrudes upwards, and is used to assist in the discharge of impurities.

6. A stable constant flow valve for irrigation according to claim 5, characterized in that: The clamping slot (105) is provided with a protrusion (1051), and the protrusion (1051) is used to block the pressure member (8).

7. A stable constant flow valve for irrigation according to claim 6, characterized in that: Also included are: A limiting member (11), wherein the valve body (1) is provided with a second sliding groove (107), the limiting member (11) is slidably connected to the second sliding groove (107), and the limiting member (11) is used to limit the blocking member (10).

8. A stable constant flow valve for irrigation according to claim 7, characterized in that: Also included are: a sliding member (12), the valve body (1) being provided with a third sliding groove (108), the sliding member (12) being slidably connected to the third sliding groove (108), a second spring being provided between the sliding member (12) and the valve body (1), and the third sliding groove (108) being communicated with the second sliding groove (107); The spring telescopic rod (13) is fixedly connected to the extrusion rod (7), and the telescopic end of the spring telescopic rod (13) and the sliding member (12) are mutually extruded.

9. A stable constant flow valve for irrigation according to claim 8, characterized in that: Also included are: A sliding rod (14), the valve body (1) is provided with a fourth sliding groove (109), the sliding rod (14) is slidably connected to the fourth sliding groove (109), and the sliding rod (14) and the blocking member (10) are pressed against each other.

10. A stable constant flow valve for irrigation according to claim 9, characterized in that: Also included are: The second slider (15) is provided with a fifth slider (110) on the valve body (1), the second slider (15) is slidably connected to the fifth slider (110), the second slider (15) and the extrusion rod (7) are mutually extruded, and the fifth slider (110) is connected to the fourth slider (109).

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