Dual-purpose valve

Abstract

The invention relates to the technical field of irrigation distribution valves, in particular to a dual-purpose valve which comprises a valve body, a first feeding pipe, a second feeding pipe and a discharging pipe, the first feeding pipe, the second feeding pipe and the discharging pipe are arranged on the valve body, and a first valve clack and a second valve clack are arranged in the first feeding pipe and the second feeding pipe respectively. The first valve clack and the second valve clack are provided with a first rotating shaft and a second rotating shaft respectively, and the first rotating shaft and the second rotating shaft are located on the same axis. After the water and fertilizer irrigation work is finished, water and fertilizer feeding of the valve body is automatically converted into water feeding, so that the inner and outer irrigation distribution pipelines of the valve body are flushed, water and fertilizer liquid is prevented from remaining in the valve body and the outer irrigation distribution pipelines, and the phenomena of pipeline corrosion and blockage caused by crystallization of the water and fertilizer liquid in the valve body and the outer irrigation distribution pipelines are completely eradicated; after irrigation distribution pipelines inside and outside the valve body are flushed for a period of time, the first feeding pipe is automatically closed, the automation degree is high, and therefore the workload of a user is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of irrigation distribution valves, and in particular to a dual-purpose valve. Background Art

[0002] Irrigation includes water irrigation and water-fertilizer irrigation, which is a technical measure to use irrigation pipes to irrigate the land with water or water-fertilizer to replenish the water or nutrients needed by crops, so as to ensure the normal growth of crops and obtain high and stable yields. The principle of irrigation is that the amount of irrigation, the number of irrigations and the time should be determined according to the water or nutrient characteristics of the plants, the growth stage, the climate and the soil conditions. It should be timely, appropriate and reasonable.

[0003] Chinese patent number CN201443634U discloses an irrigation switch, including a switch body, the switch body is provided with a water inlet and a water outlet, the switch body is provided with a neck; the switch body is provided with a sealing valve body, the sealing valve body is clamped to the pre-portion under the action of water pressure: the outer diameter of the sealing valve body is adapted to the inner diameter of the switch body so that it can move within the switch body. The irrigation switch proposed in the utility model presses the sealing valve body against the neck of the switch body with the help of water pressure to achieve sealing when not in use, and moves the sealing valve body in the direction against the water pressure when in use. The irrigation switch proposed in the utility model saves more water, electricity, labor, increases land utilization, and is low in cost.

[0004] At present, water irrigation and water-fertilizer irrigation mostly use the same irrigation system. After the device is used for water-fertilizer irrigation, the user needs to spend extra time flushing the irrigation pipes, which increases the workload of the users. If the staff forgets to flush due to negligence, the residual water and fertilizer liquid in the pipes will crystallize, and even cause corrosion and blockage of the pipes. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a dual-purpose valve to solve the above problem.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] A dual-purpose valve comprises a valve body and a first feed pipe, a second feed pipe and a discharge pipe arranged on the valve body, wherein a first valve flap and a second valve flap are respectively arranged in the first feed pipe and the second feed pipe, a first rotating shaft and a second rotating shaft are respectively arranged on the first valve flap and the second valve flap, and the first rotating shaft and the second rotating shaft are located on the same axis, the first feed pipe is rotatably connected with the first rotating shaft through penetration and the second feed pipe is rotatably connected with the second rotating shaft through penetration; a first hand wheel and a second hand wheel are respectively arranged at the ends of the first rotating shaft and the second rotating shaft away from each other, a first torsion spring is sleeved on the first rotating shaft between the first feed pipe and the first hand wheel, a second torsion spring is sleeved on the second rotating shaft between the second feed pipe and the second hand wheel, and the elastic strength of the first torsion spring is lower than the elastic strength of the second torsion spring;

[0008] The first feed pipe is rotatably connected to a rotating drum on one side close to the second feed pipe, and the other end of the first rotating shaft coaxially penetrates into the interior of the rotating drum and its end is fixedly connected to a connecting frame, and the connecting frame is fixedly connected to the inner wall of the rotating drum; a connecting hole is provided on the side wall of the first feed pipe, and the first feed pipe is fluidically connected to the rotating drum through the connecting hole; a piston is slidably fitted in the rotating drum, and a connecting block is coaxially fixedly connected to the side of the piston away from the first feed pipe, and a one-way tooth is provided on the connecting block, and a first spring is installed between the other side of the piston and the connecting frame, and the other end of the second rotating shaft is coaxially fixedly connected to an internal gear, and a tooth groove matching the one-way tooth is provided on the internal gear; a one-way limiting mechanism for preventing the rotating drum and the internal gear from reverse flow is provided on the valve body.

[0009] Preferably, the space inside the valve body is composed of a feed chamber, a channel and a discharge chamber, the first feed pipe and the second feed pipe are both in fluid communication with the feed chamber, and the discharge pipe is in fluid communication with the discharge chamber;

[0010] When the first valve flap closes the first feed pipe, the internal space of the first feed pipe is divided into an input chamber and an output chamber, wherein the input chamber is in fluid communication with the connecting hole, and the output chamber is in fluid communication with the feed chamber.

[0011] Preferably, the limiting mechanism includes a first limiting tooth arranged on the rotating drum and a second limiting tooth arranged on the internal gear; a sliding groove is opened on the valve body, and a limiting body is slidably matched in the sliding groove, and the two sides of the limiting body extending out of the sliding groove are respectively provided with a first inclined surface and a second inclined surface, the first limiting tooth matches the first inclined surface and the second limiting tooth matches the second inclined surface, and a pressure handle is fixedly connected to the limiting body located outside the sliding groove.

[0012] Preferably, the other end of the limiting body is fixedly connected to an elastic block, the side of the elastic block away from the limiting body is fixedly connected to a connecting plate, the other side of the connecting plate is fixedly connected to a push rod, the other end of the push rod is configured to be conical, a through hole is provided on the valve body, the conical end of the push rod passes through the through hole and extends to the interior of the feed chamber, and a second spring is installed between the connecting plate and the inner bottom wall of the slide groove.

[0013] Preferably, a center rod is slidably connected through the side wall of the valve body away from the discharge chamber, one end of the center rod passes through the feed chamber and the channel in sequence and extends to the interior of the discharge chamber, and a pressure plate is fixedly connected to its end, and a sealing plug is slidably connected through the center rod between the channel and the pressure plate, the sealing plug matches the channel, a third spring is installed between the sealing plug and the pressure plate, and the center rod is coaxially arranged with the feed chamber.

[0014] Preferably, a positioning ring is coaxially fixedly connected to the center rod located in the feed chamber, and when the positioning ring moves along the axis of the center rod, it abuts against the conical end of the push rod, and the push rod is retracted into the through hole and the limiting body extends out of the slide groove.

[0015] Preferably, it also includes an adjusting cap, one side of which is coaxially fixedly connected with a connecting ring, a spiral groove is provided on the outer surface of the connecting ring, and a ring groove matching the connecting ring is provided on the side of the valve body away from the discharge chamber, a protrusion is provided on the inner wall of the ring groove, and the inner wall of the spiral groove is slidably matched with the outer surface of the protrusion.

[0016] Preferably, a first mounting groove is coaxially opened in the adjusting cap, one end of the center rod passing through the valve body is coaxially rotatably connected to the adjusting cap and its end is inserted into the interior of the first mounting groove, and a volute spring is installed between the outer surface of the center rod and the inner wall of the first mounting groove.

[0017] Preferably, a key block is provided on the center rod, and a key slot is opened on the valve body. The outer surface of the key block is slidably matched with the inner wall of the key slot. A one-way limit rack is provided in the key slot. The one-way limit rack can move in the key slot in a direction perpendicular to the axis of the center rod. A third limit tooth is provided on the key block, and the one-way limit rack matches the third limit tooth.

[0018] Preferably, a second mounting groove is provided on the valve body, a third mounting groove is provided between the key groove and the second mounting groove, a sliding plate is slidably fitted in the third mounting groove, two ends of the sliding plate extend into the key groove and the second mounting groove respectively, the sliding plate is fixedly connected to the one-way limit rack, an electric spring device is installed between the sliding plate located inside the second mounting groove and the inner wall of the second mounting groove, and when the electric spring device contracts, the sliding plate is pulled and the one-way limit rack is driven close to the center rod, and the one-way limit rack is engaged with the third limit tooth.

[0019] The beneficial effects of the present invention are:

[0020] 1. After the water and fertilizer irrigation work of the present invention is completed, the valve body automatically switches from water and fertilizer to water, and then flushes the inside of the valve body and the external irrigation distribution pipeline to prevent the water and fertilizer liquid from remaining in the valve body and the external irrigation distribution pipeline, and also prevents the water and fertilizer liquid from crystallizing inside the valve body and causing pipeline corrosion and blockage. After flushing the inside of the valve body and the external irrigation distribution pipeline for a period of time, the first feed pipe is automatically closed. The present invention has a high degree of automation, thereby reducing the workload of users.

[0021] 2. During use, the present invention has the function of preventing liquid backflow, and the user can adjust the compression amount of the third spring according to needs, that is, adjust the water inlet amount of the discharge chamber, thereby realizing the function of adjusting the liquid output of the device, further improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The structure of the present invention is schematically shown Figure 1 .

[0023] Figure 2 The structure of the present invention is schematically shown Figure 2 .

[0024] Figure 3 It is a cross-sectional structural schematic diagram of the present invention.

[0025] Figure 4 For the present invention Figure 3 Schematic diagram of the structure with a partial enlargement at point A in the middle.

[0026] Figure 5 It is a schematic structural diagram of the connection between the one-way limiting rack and the sliding plate of the present invention.

[0027] Figure 6 It is a structural schematic diagram of the installation of the one-way limiting mechanism of the present invention.

[0028] Figure 7 It is a schematic diagram of the structure of the one-way tooth and the tooth groove engaging with each other in the present invention.

[0029] Figure 8 For the present invention Figure 6 Schematic diagram of the structure with a partial enlargement at point B in the middle.

[0030] In the attached drawings: 1, valve body; 2, first feed pipe; 3, second feed pipe; 4, discharge pipe; 5, first rotating shaft; 6, second rotating shaft; 7, first valve flap; 8, second valve flap; 9, connecting frame; 10, rotating cylinder; 11, connecting hole; 12, piston; 13, connecting block; 14, one-way tooth; 15, first spring; 16, tooth groove; 17, first hand wheel; 18, second hand wheel; 19, first torsion spring; 20, second torsion spring; 21, first limit tooth; 22, second limit tooth; 23, slide groove; 24, limit body; 25, first inclined surface; 26, second inclined surface; 27, elastic block; 28, connecting plate; 29, second spring; 30, pressure Handle; 31. Feed chamber; 32. Channel; 33. Discharge chamber; 34. Sealing plug; 35. Center rod; 36. Pressure plate; 37. Third spring; 38. Positioning ring; 39. Ring frame; 40. Blade; 41. Adjusting cap; 42. Connecting ring; 43. Spiral groove; 44. Annular groove; 45. Protrusion; 46. First mounting groove; 47. Volute spring; 48. Key block; 49. Key groove; 50. One-way limiting rack; 51. Third limiting tooth; 52. Second mounting groove; 53. Third mounting groove; 54. Sliding plate; 55. Electric spring device; 56. Push rod; 57. Internal gear; 58. Input chamber; 59. Output chamber. DETAILED DESCRIPTION

[0031] The following will refer to Figures 1 to 8 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0032] A dual-purpose valve, such as Figure 1-Figure 3 and Figure 6As shown, it includes a valve body 1 and a first feed pipe 2, a second feed pipe 3 and a discharge pipe 4 arranged on the valve body 1, the first feed pipe 2 is connected to an external water supply device (for example, a water storage tank with pressure), the second feed pipe 3 is connected to an external water and fertilizer supply device, and the discharge pipe 4 is connected to an external irrigation distribution pipeline; a first valve flap 7 and a second valve flap 8 are respectively arranged in the first feed pipe 2 and the second feed pipe 3, a first rotating shaft 5 and a second rotating shaft 6 are respectively arranged on the first valve flap 7 and the second valve flap 8, and the first rotating shaft 5 and the second rotating shaft 6 are located on the same axis, the first feed pipe 2 and the first rotating shaft 5 are rotatably connected through, and the second feed pipe 3 and the second rotating shaft 6 penetrates and is rotatably connected; a first hand wheel 17 and a second hand wheel 18 are respectively provided at one end of the first rotating shaft 5 and the second rotating shaft 6 away from each other; a first torsion spring 19 is sleeved on the first rotating shaft 5 between the first feed pipe 2 and the first hand wheel 17, and a second torsion spring 20 is sleeved on the second rotating shaft 6 between the second feed pipe 3 and the second hand wheel 18, and the elastic strength of the first torsion spring 19 is lower than the elastic strength of the second torsion spring 20; the space inside the valve body 1 is composed of a feed chamber 31, a channel 32 and a discharge chamber 33, the first feed pipe 2 and the second feed pipe 3 are both fluidly connected to the feed chamber 31, and the discharge pipe 4 is fluidly connected to the discharge chamber 33.

[0033] When the first hand wheel 17 is rotated forward (clockwise), the first valve flap 7 rotates and opens the first feed pipe 2, and the external water supply device injects water into the valve body 1 through the first feed pipe 2; when the second hand wheel 18 is rotated forward (clockwise), the second valve flap 8 rotates and opens the second feed pipe 3, and the external water and fertilizer supply device injects water and fertilizer into the valve body 1 through the second feed pipe 3; the user chooses to open the first feed pipe 2 or the second feed pipe 3 according to demand, and then the water or water and fertilizer pass through the feed chamber 31, the channel 32 and the discharge chamber 33 in turn, and finally discharged into the external irrigation distribution pipeline through the discharge pipe 4 to achieve water irrigation or water and fertilizer irrigation.

[0034] like Figure 6 As shown, it should be noted that, since the first hand wheel 17 and the second hand wheel 18 are arranged oppositely, the rotation direction of the first hand wheel 17 when opening the first feeding pipe 2 is opposite to the rotation direction of the second hand wheel 18 when opening the second feeding pipe 3.

[0035] like Figure 3 , Figure 6-Figure 8As shown, the first feed pipe 2 is rotatably connected to a rotating drum 10 on one side close to the second feed pipe 3, the other end of the first rotating shaft 5 coaxially penetrates into the interior of the rotating drum 10 and its end is fixedly connected to a connecting frame 9, and the connecting frame 9 is fixedly connected to the inner wall of the rotating drum 10; a connecting hole 11 is provided on the side wall of the first feed pipe 2, and the first feed pipe 2 is fluidically connected to the rotating drum 10 through the connecting hole 11; a piston 12 is slidably fitted in the rotating drum 10, the piston 12 can only slide in the rotating drum 10, and the rotating drum 10 and the piston 12 rotate synchronously (for example, the outer surface of the piston 12 and the inner wall of the rotating drum 10 are both set to be elliptical) ; The piston 12 is coaxially fixedly connected to a connecting block 13 on one side away from the first feed pipe 2, and a one-way tooth 14 is provided on the connecting block 13. A first spring 15 is installed between the other side of the piston 12 and the connecting frame 9. The other end of the second rotating shaft 6 is coaxially fixedly connected to an internal gear 57, and a tooth groove 16 matching the one-way tooth 14 is provided on the internal gear 57. When the first valve flap 7 closes the first feed pipe 2, the internal space of the first feed pipe 2 is divided into an input chamber 58 and an output chamber 59. The input chamber 58 is fluidly connected to the connecting hole 11, and the output chamber 59 is fluidly connected to the feed chamber 31.

[0036] When the one-way tooth 14 is in the engaged state with the tooth groove 16, when the first feed pipe 2 is opened, the water pressure inside the input chamber 58 decreases, and under the pulling force of the first spring 15, the piston 12 moves close to the first feed pipe 2 and slowly discharges the water in the rotating drum 10 into the first feed pipe 2 through the connecting hole 11 (the aperture of the connecting hole 11 is small, so the movement speed of the piston 12 is slow), and the connecting block 13 is retracted into the rotating drum 10 to disengage the one-way tooth 14 from the tooth groove 16.

[0037] like Figure 3 , Figure 6-Figure 8 As shown, the valve body 1 is provided with a one-way limiting mechanism for preventing the rotating drum 10 and the internal gear 57 from reversing; the limiting mechanism includes a first limiting tooth 21 arranged on the rotating drum 10 and a second limiting tooth 22 arranged on the internal gear 57; a slide groove 23 is provided on the valve body 1, and a limiting body 24 is slidably matched in the slide groove 23, and a first inclined surface 25 and a second inclined surface 26 are respectively provided on both sides of one end of the limiting body 24 extending out of the slide groove 23, and the first limiting tooth 21 matches the first inclined surface 25 and the second limiting tooth 22 matches the second inclined surface 26. 6 matches; a pressure handle 30 is fixedly connected to the limiting body 24 located outside the slide groove 23; an elastic block 27 is fixedly connected to the other end of the limiting body 24, a connecting plate 28 is fixedly connected to the side of the elastic block 27 away from the limiting body 24, and a push rod 56 is fixedly connected to the other side of the connecting plate 28, and the other end of the push rod 56 is set to be conical, a through hole is opened on the valve body 1, and the conical end of the push rod 56 passes through the through hole and extends to the inside of the feed chamber 31, and a second spring 29 is installed between the connecting plate 28 and the inner bottom wall of the slide groove 23.

[0038] While rotating the first valve flap 7 to open the first feed pipe 2 or rotating the second valve flap 8 to open the second feed pipe 3, the first torsion spring 19 or the second torsion spring 20 accumulates force. Through the setting of the one-way limiting mechanism, the position of the rotating drum 10 or the internal gear 57 after rotation can be limited, that is, the first rotating shaft 5 or the second rotating shaft 6 is prevented from rotating in the opposite direction, thereby realizing the position limitation of the first valve flap 7 or the second valve flap 8 after rotation.

[0039] like Figure 3-Figure 5 As shown, a center rod 35 is slidably connected to the side wall of the valve body 1 away from the discharge chamber 33, a middle hole is provided on the valve body 1 for the center rod 35 to pass through, a key block 48 is provided on the center rod 35, and a key groove 49 is provided on the valve body 1. The outer surface of the key block 48 is slidably matched with the inner wall of the key groove 49, that is, the center rod 35 can slide along the direction of the key groove 49; one end of the center rod 35 passes through the feed chamber 31 and the channel 32 in sequence and extends to the inside of the discharge chamber 33, and a pressure plate 36 is fixedly connected to its end, and a sealing plug 34 is slidably connected to the center rod 35 between the channel 32 and the pressure plate 36, and the sealing plug 34 matches the channel 32, and the sealing plug 34 is used to close the channel 32; a third spring 37 is installed between the sealing plug 34 and the pressure plate 36, and the center rod 35 is coaxially arranged with the feed chamber 31.

[0040] like Figure 3 , Figure 6-Figure 8 As shown, a positioning ring 38 is coaxially fixedly connected to the center rod 35 located in the feed chamber 31. When the positioning ring 38 moves along the axial direction of the center rod 35, it presses against the conical end of the push rod 56, and the push rod 56 is retracted into the through hole and the limiting body 24 extends out of the slide groove 23; an annular frame 39 is rotatably connected to the positioning ring 38, and more than two blades 40 are provided on the annular frame 39, and the blades 40 match the output end of the second feed pipe 3.

[0041] It should be noted that during the water and fertilizer irrigation process of the device, impurities mixed in the water and fertilizer are easy to precipitate (such as dust and fertilizers that are not completely dissolved, etc.). Through the setting of the blades 40, when the second feed pipe 3 transports water and fertilizer to the inside of the valve body 1, the water and fertilizer impact on the blades 40 and drive the annular frame 39 to drive all the blades 40 to rotate, thereby disturbing the liquid in various places in the valve body 1 to prevent impurities from accumulating inside the valve body 1.

[0042] like Figure 3-Figure 5As shown, it also includes an adjusting cap 41, one side of the adjusting cap 41 is coaxially fixedly connected with a connecting ring 42, the outer surface of the connecting ring 42 is provided with a spiral groove 43, and the side of the valve body 1 away from the discharge chamber 33 is provided with an annular groove 44 matching the connecting ring 42, and the inner wall of the annular groove 44 is provided with a protrusion 45, and the inner wall of the spiral groove 43 is slidably matched with the outer surface of the protrusion 45; a first mounting groove 46 is coaxially opened in the adjusting cap 41, one end of the center rod 35 passing through the valve body 1 is coaxially rotatably connected to the adjusting cap 41 and its end portion passes into the interior of the first mounting groove 46, and a volute spring 47 is installed between the outer surface of the center rod 35 and the inner wall of the first mounting groove 46.

[0043] Through the matching arrangement of the spiral groove 43 and the protrusion 45 , when the adjusting cap 41 is rotated forward, the connecting ring 42 extends out of the annular groove 44 , and at the same time the adjusting cap 41 moves away from the valve body 1 , and pulls the center rod 35 out of the valve body 1 .

[0044] A one-way limit rack 50 is provided in the key slot 49, and the one-way limit rack 50 can move in the key slot 49 along a direction perpendicular to the axis of the center rod 35. A third limit tooth 51 is provided on the key block 48, and the one-way limit rack 50 matches the third limit tooth 51; when the one-way limit rack 50 is engaged with the third limit tooth 51, the center rod 35 can only be pulled out of the valve body 1, and the center rod 35 cannot be retracted into the valve body 1 for movement.

[0045] A second mounting groove 52 is provided on the valve body 1, and a third mounting groove 53 is provided between the key groove 49 and the second mounting groove 52. A sliding plate 54 is slidably fitted in the third mounting groove 53. Two ends of the sliding plate 54 extend into the key groove 49 and the second mounting groove 52 respectively. The sliding plate 54 is fixedly connected to the one-way limiting rack 50. An electric spring device 55 is installed between the sliding plate 54 located inside the second mounting groove 52 and the inner wall of the second mounting groove 52. The electric spring device 55 is a prior art, which is equivalent to an energized solenoid. Each turn of the spring is equivalent to a circular current. The current directions in each turn of the spring are the same. According to the mutual attraction between the currents in the same direction, each turn of the spring attracts the adjacent springs. Therefore, the electric spring device 55 will shrink as a whole. When the electric spring device 55 shrinks, the sliding plate 54 is pulled to make the one-way limiting rack 50 move close to the center rod 35, and the one-way limiting rack 50 is engaged with the third limiting tooth 51.

[0046] The working principle of the device is as follows: in the initial state, the channel 32 is in the open state. When the adjusting cap 41 is rotated in the forward direction (while the spiral spring 47 accumulates force), the adjusting cap 41 is moved away from the valve body 1 and the center rod 35 is pulled out of the valve body 1 by the coordinated arrangement of the spiral groove 43 and the protrusion 45. The third spring 37 pushes against the sealing plug 34 so that the sealing plug 34 closes the channel 32. At this time, liquid is injected into the valve body 1, and the liquid pushes the sealing plug 34 (while the third spring 37 is compressed) to open the channel 32, and then the liquid enters the discharge chamber 33. When the injection of liquid into the valve body 1 stops, the sealing plug 34 is acted upon by the pushing force of the third spring 37 to reclose the channel 32, so that the device has the function of preventing liquid reflux.

[0047] It should be noted that the user can adjust the compression amount of the third spring 37 according to the number of turns of the adjusting cap 41, that is, adjust the resistance to the opening of the channel 32. During the liquid conveying process, the greater the resistance to the opening of the channel 32, the smaller the amount of liquid entering the discharge chamber 33 after the channel 32 is opened, thereby achieving the adjustment of the liquid output of the device.

[0048] It is worth noting that when the device is in use, the irrigation system circuit is energized, that is, the electric spring device 55 in the initial state is energized and contracted, at which time the one-way limit rack 50 and the third limit tooth 51 are in an engaged state, and during the process of the center rod 35 being pulled out of the valve body 1, the one-way limit rack 50 will not block the movement of the key block 48 and the center rod 35, and through the coordinated arrangement of the one-way limit rack 50 and the third limit tooth 51, the position of the center rod 35 after movement can be locked, that is, the position of the adjusting cap 41 can be locked (that is, the volute spring 47 cannot release the force to cause the adjusting cap 41 to rotate in the opposite direction).

[0049] It should be noted that, in the initial stage of the process of withdrawing the center rod 35 from the valve body 1, the positioning ring 38 is pulled and the positioning ring 38 is pressed against the conical end of the push rod 56, and the connecting plate 28, the elastic block 27 and the limiting body 24 all move synchronously with the push rod 56, and the limiting body 24 extends out of the slide groove 23. At this time, the position of the first limiting tooth 21 matches the first inclined surface 25, and the position of the second limiting tooth 22 matches the second inclined surface 26.

[0050] When water and fertilizer irrigation is selected, the second hand wheel 18 is rotated forward, the second rotating shaft 6 rotates forward with the second valve flap 8 and opens the second feed pipe 3 (at the same time, the second torsion spring 20 stores force), and the external water and fertilizer supply device injects water and fertilizer into the interior of the valve body 1 through the second feed pipe 3, and then the water and fertilizer pass through the feed chamber 31, the channel 32 and the discharge chamber 33 in sequence, and finally are discharged into the external irrigation distribution pipeline through the discharge pipe 4 to achieve water and fertilizer irrigation; it should be noted that in the initial state, the one-way tooth 14 and the tooth groove 16 are in an engaged state. At this time, when the second rotating shaft 6 rotates forward, the internal gear 57 rotates with the second rotating shaft 6, and the one-way tooth 14 will not block the rotation of the internal gear 57. At this time, the connecting block 13 and the internal gear 57 are not linked; through the matching setting of the second limiting tooth 22 and the second inclined surface 26, the limiting body 24 will not block the positive rotation of the internal gear 57, but will limit the position of the internal gear 57 after rotation, that is, limit the second valve flap 8 after the second feed pipe 3 is opened.

[0051] After the water and fertilizer irrigation work is completed, when the circuit of the irrigation system is powered off, the electric spring device 55 is powered off and unfolded, and the electric spring device 55 pushes against the sliding plate 54 and disengages the one-way limiting rack 50 from the third limiting tooth 51, thereby releasing the limit on the center rod 35. Under the action of the restoring force of the volute spring 47, combined with the setting of the spiral groove 43 and the protrusion 45, the adjusting cap 41 rotates in the opposite direction and approaches the valve body 1, driving the center rod 35 to be retracted into the valve body 1 for reset, and the third spring 37 no longer pushes against the sealing plug 34 and pulls the sealing plug 34 to reset, and the channel 32 is automatically opened.

[0052] It should be noted that, when the center rod 35 is retracted into the valve body 1, the positioning ring 38 moves with the center rod 35 and no longer presses against the top rod 56, the second spring 29 pulls the connecting plate 28 to reset and retracts the limiting body 24 into the slide groove 23, the limiting body 24 no longer limits the internal gear 57, the second torsion spring 20 releases the force and causes the second hand wheel 18 to rotate with the second shaft 6 and the internal gear 57 in the opposite direction. At this time, the one-way tooth 14 and the tooth groove 16 are in an engaged state, and the elastic strength of the first torsion spring 19 is lower than the elastic strength of the second torsion spring 20. When the internal gear 57 rotates in the opposite direction, the connecting block 13 is driven to drive the piston 12 to rotate, so that the first shaft 5, the connecting frame 9, and the first valve flap 7 , the rotating drum 10 and the first hand wheel 17 rotate synchronously (at the same time, the first torsion spring 19 stores force). Since the first hand wheel 17 is opposite to the second hand wheel 18, the first valve flap 7 is in the positive rotation direction at this time, that is, the first feed pipe 2 is opened; after the water and fertilizer irrigation work is completed, the water and fertilizer in the valve body 1 are automatically converted into water, and then the inside of the valve body 1 and the external irrigation distribution pipeline are flushed to prevent the valve body 1 and the external irrigation distribution pipeline from having residual water and fertilizer liquid in the valve body 1, and to prevent the water and fertilizer liquid from crystallizing in the two to cause pipeline corrosion and blockage; it should be noted that at this time, the channel 32 is in an open state, so that the water output of the channel 32 reaches the maximum, thereby improving the flushing effect.

[0053] After the first feed pipe 2 is opened, the water pressure inside the input chamber 58 decreases. Under the pulling force of the first spring 15, the piston 12 moves close to the first feed pipe 2 and slowly discharges the water in the drum 10 into the first feed pipe 2 through the connecting hole 11. The connecting block 13 slowly retracts into the drum 10, so that the one-way teeth 14 are disengaged from the tooth grooves 16. At the moment when the one-way teeth 14 are disengaged from the tooth grooves 16, the first torsion spring 19 releases its force and causes the first hand wheel 17 to rotate in the opposite direction with the first rotating shaft 5, and the first valve flap 7 rotates in the opposite direction and recloses the first feed pipe 2. That is, after the water flushes the inside of the valve body 1 and the external irrigation distribution pipeline for a period of time, the first feed pipe 2 is automatically closed.

[0054] When water irrigation is selected, the first hand wheel 17 is rotated forward to rotate the first rotating shaft 5 with the first valve flap 7 (while the first torsion spring 19 stores force), the first feed pipe 2 is opened, and the external water supply device injects water into the valve body 1, and then the water passes through the feed chamber 31, the channel 32 and the discharge chamber 33 in sequence, and is finally discharged into the external irrigation distribution pipeline through the discharge pipe 4 to achieve water irrigation.

[0055] It should be noted that the drum 10, the piston 12 and the connecting block 13 rotate in the forward direction following the first rotating shaft 5. Through the cooperation of the first limiting tooth 21 and the first inclined surface 25, the limiting body 24 will not block the forward rotation of the drum 10, but will limit the position of the drum 10 after rotation, that is, limit the first valve flap 7 after the first feed pipe 2 is opened, and through the cooperation of the one-way tooth 14 and the tooth groove 16, the connecting block 13 will not be linked with the internal gear 57.

[0056] Following the same principle as above, after the first feed pipe 2 is opened, the one-way tooth 14 disengages from the tooth groove 16. After the water irrigation work is completed, the circuit of the irrigation system is powered off, the limiting body 24 no longer limits the rotating drum 10, and the first torsion spring 19 releases force to cause the first hand wheel 17, the first rotating shaft 5 and the first valve flap 7 to rotate in the opposite direction, thereby closing the first feed pipe 2.

[0057] It should be noted that when this embodiment is actually used, when the irrigation power system is powered, the water irrigation or water-fertilizer irrigation working state can also be ended. The pressure handle 30 can be manually pressed to retract the limiting body 24 into the slide groove 23 (while the elastic block 27 is compressed). Based on the above principle, the first feed pipe 2 or the second feed pipe 3 is automatically closed.

[0058] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0059] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A dual-purpose valve, comprising a valve body (1) and a first feed pipe (2), a second feed pipe (3) and a discharge pipe (4) arranged on the valve body (1), characterized in that: A first valve flap (7) and a second valve flap (8) are respectively provided in the first feed pipe (2) and the second feed pipe (3); a first rotating shaft (5) and a second rotating shaft (6) are respectively provided on the first valve flap (7) and the second valve flap (8); the first rotating shaft (5) and the second rotating shaft (6) are located on the same axis; the first feed pipe (2) and the first rotating shaft (5) are rotatably connected through the first feed pipe (2) and the second feed pipe (3) and the second rotating shaft (6) are rotatably connected through the second feed pipe (3); a first hand wheel (17) and a second hand wheel (18) are respectively provided at the ends of the first rotating shaft (5) and the second rotating shaft (6) which are away from each other; a first torsion spring (19) is sleeved on the first rotating shaft (5) between the first feed pipe (2) and the first hand wheel (17); a second torsion spring (20) is sleeved on the second rotating shaft (6) between the second feed pipe (3) and the second hand wheel (18); the elastic strength of the first torsion spring (19) is lower than the elastic strength of the second torsion spring (20); The first feed pipe (2) is rotatably connected to a rotating drum (10) on one side close to the second feed pipe (3); the other end of the first rotating shaft (5) coaxially penetrates into the interior of the rotating drum (10) and its end is fixedly connected to a connecting frame (9); the connecting frame (9) is fixedly connected to the inner wall of the rotating drum (10); a connecting hole (11) is provided on the side wall of the first feed pipe (2); the first feed pipe (2) is fluidically connected to the rotating drum (10) through the connecting hole (11); a piston (12) is slidably fitted in the rotating drum (10); the piston (12) is 2) A connecting block (13) is coaxially fixedly connected to the side away from the first feed pipe (2), and a one-way tooth (14) is provided on the connecting block (13); a first spring (15) is installed between the other side of the piston (12) and the connecting frame (9); the other end of the second rotating shaft (6) is coaxially fixedly connected to an internal gear (57), and a tooth groove (16) matching the one-way tooth (14) is provided on the internal gear (57); and a one-way limiting mechanism for preventing the rotating cylinder (10) and the internal gear (57) from reverse rotation is provided on the valve body (1).

2. A dual-purpose valve according to claim 1, characterized in that: The space inside the valve body (1) is composed of a feed chamber (31), a channel (32) and a discharge chamber (33); the first feed pipe (2) and the second feed pipe (3) are both in fluid communication with the feed chamber (31); and the discharge pipe (4) is in fluid communication with the discharge chamber (33); When the first valve flap (7) closes the first feed pipe (2), the internal space of the first feed pipe (2) is divided into an input chamber (58) and an output chamber (59), wherein the input chamber (58) is fluidically connected to the connecting hole (11), and the output chamber (59) is fluidically connected to the feed chamber (31).

3. A dual-purpose valve according to claim 2, characterized in that: The limiting mechanism comprises a first limiting tooth (21) arranged on the rotating drum (10) and a second limiting tooth (22) arranged on the internal gear (57); a sliding groove (23) is provided on the valve body (1), a limiting body (24) is slidably matched in the sliding groove (23), and a first inclined surface (25) and a second inclined surface (26) are respectively provided on both sides of an end of the limiting body (24) extending out of the sliding groove (23), the first limiting tooth (21) matches the first inclined surface (25) and the second limiting tooth (22) matches the second inclined surface (26), and a pressing handle (30) is fixedly connected to the limiting body (24) located outside the sliding groove (23).

4. A dual-purpose valve according to claim 3, characterized in that: The other end of the limiting body (24) is fixedly connected to an elastic block (27), and the side of the elastic block (27) away from the limiting body (24) is fixedly connected to a connecting plate (28), and the other side of the connecting plate (28) is fixedly connected to a push rod (56), and the other end of the push rod (56) is set to be conical, and a through hole is opened on the valve body (1), and the conical end of the push rod (56) passes through the through hole and extends to the inside of the feed chamber (31), and a second spring (29) is installed between the connecting plate (28) and the inner bottom wall of the slide groove (23).

5. A dual-purpose valve according to claim 4, characterized in that: A center rod (35) is slidably connected to the side wall of the valve body (1) away from the discharge chamber (33), one end of the center rod (35) passes through the feed chamber (31) and the channel (32) in sequence and extends to the interior of the discharge chamber (33), and a pressure plate (36) is fixedly connected to the end thereof. A sealing plug (34) is slidably connected to the center rod (35) between the channel (32) and the pressure plate (36), the sealing plug (34) matches the channel (32), and a third spring (37) is installed between the sealing plug (34) and the pressure plate (36), and the center rod (35) is coaxially arranged with the feed chamber (31).

6. A dual-purpose valve according to claim 5, characterized in that: A positioning ring (38) is coaxially fixedly connected to the center rod (35) located in the feed chamber (31). When the positioning ring (38) moves along the axis of the center rod (35), it abuts against the conical end of the push rod (56), so that the push rod (56) is retracted into the through hole and the limiting body (24) extends out of the slide groove (23).

7. A dual-purpose valve according to claim 5, characterized in that: It also includes an adjusting cap (41), one side of which is coaxially fixedly connected to a connecting ring (42), a spiral groove (43) is provided on the outer surface of the connecting ring (42), and a ring groove (44) matching the connecting ring (42) is provided on the side of the valve body (1) away from the discharge chamber (33), a protrusion (45) is provided on the inner wall of the ring groove (44), and the inner wall of the spiral groove (43) is slidably matched with the outer surface of the protrusion (45).

8. A dual-purpose valve according to claim 7, characterized in that: A first mounting groove (46) is coaxially formed inside the adjusting cap (41); one end of the center rod (35) protrudes from the valve body (1) and is coaxially rotatably connected to the adjusting cap (41), and the end of the center rod (35) is inserted into the interior of the first mounting groove (46); a volute spring (47) is installed between the outer surface of the center rod (35) and the inner wall of the first mounting groove (46).

9. A dual-purpose valve according to claim 5, characterized in that: The center rod (35) is provided with a key block (48), the valve body (1) is provided with a key groove (49), the outer surface of the key block (48) is slidably matched with the inner wall of the key groove (49), a one-way limit rack (50) is provided in the key groove (49), the one-way limit rack (50) can move in the key groove (49) in a direction perpendicular to the axis of the center rod (35), the key block (48) is provided with a third limit tooth (51), the one-way limit rack (50) matches the third limit tooth (51).

10. A dual-purpose valve according to claim 9, characterized in that: The valve body (1) is provided with a second mounting groove (52), a third mounting groove (53) is provided between the key groove (49) and the second mounting groove (52), a sliding plate (54) is slidably matched in the third mounting groove (53), two ends of the sliding plate (54) respectively extend into the key groove (49) and the second mounting groove (52), the sliding plate (54) is fixedly connected to the one-way limiting rack (50), an electric spring device (55) is installed between the sliding plate (54) located inside the second mounting groove (52) and the inner wall of the second mounting groove (52), when the electric spring device (55) contracts, the sliding plate (54) is pulled and the one-way limiting rack (50) is driven to approach the center rod (35), and the one-way limiting rack (50) is engaged with the third limiting tooth (51).

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