Saline-alkali soil rainwater collection and storage, irrigation and fertilization integrated system

Abstract

The invention relates to a saline-alkali soil rainwater collection and storage, irrigation and fertilization integrated system, and belongs to the technical field of saline-alkali soil planting, the saline-alkali soil rainwater collection and storage, irrigation and fertilization integrated system comprises a drip irrigation pipe and a fertilization pool, the drip irrigation pipe is laid on saline-alkali soil, one end of the drip irrigation pipe extends into the fertilization pool, and the saline-alkali soil rainwater collection and storage, irrigation and fertilization integrated system further comprises a water collection pipe and a collection and storage tank, the storage tank is positioned below the water collecting pipe; one end, far away from the storage tank, of the water inlet pipe is communicated with the water collecting pipe, and one end, far away from the storage tank, of the water outlet pipe is communicated with the interior of the fertilizer preparation pool; the water collecting pipe is laid in the horizontal direction, and a plurality of water permeable holes are formed in the top of the water collecting pipe at intervals in the length direction of the water collecting pipe. A first pressure pump and an on-off valve are arranged on the water outlet pipe, a second pressure pump is arranged on the drip irrigation pipe, and the device has the effects that rainfall resources are recycled, and rainwater accumulation, irrigation and fertilization of the saline-alkali soil are integrated.

Description

Technical Field

[0001] The present application relates to the technical field of saline-alkali land cultivation, and in particular to a saline-alkali land rainwater collection, irrigation and fertilization integrated system. Background Art

[0002] Severe saline-alkali land refers to a type of land with a high salt-alkali content in the soil, which seriously inhibits plant growth. Soil salinization refers to the process in which the salt in the bottom soil or groundwater rises to the surface with capillary water, and after the water evaporates, the salt accumulates in the surface soil. When the salinity of the soil reaches a severe level, it will make it difficult for most crops to grow normally or even impossible to grow. Electrical conductivity is an important indicator to measure the salt content of the soil. A value greater than 16dS / m is generally considered to be severe saline-alkali land.

[0003] Compared with traditional flood irrigation, drip irrigation can accurately supply water, avoiding the situation where a large amount of irrigation water flows on the ground and brings a large amount of underground salt to the surface. In severe saline-alkali land, since salt mainly accumulates on the surface of the soil, drip irrigation only moistens the local soil around the root system of crops, so that the salt concentration of this part of the soil is diluted by irrigation water, creating a good soil environment for vegetation growth.

[0004] During the rainy season, rainwater seeping into the ground is actually flooding, which results in a waste of rainwater resources and easily leads to soil salinization. Summary of the invention

[0005] In order to improve the utilization rate of natural precipitation and realize the integration of rainwater collection, irrigation and fertilization, the present application provides a saline-alkali land rainwater collection, irrigation and fertilization integrated system. This system can effectively improve the utilization rate of natural precipitation and effectively prevent soil salinization by recycling natural precipitation and using fresh water for drip irrigation.

[0006] The present application provides a saline-alkali land rainwater collection, irrigation and fertilization integrated system using the following technical solutions: A saline-alkali land rainwater collection, irrigation and fertilization integrated system comprises a drip irrigation pipe and a fertilization pool, wherein the drip irrigation pipe is laid on the saline-alkali land and one end of the drip irrigation pipe extends into the fertilizer pool, and further comprises a water collecting pipe and a collecting tank, wherein both the water collecting pipe and the collecting tank are buried underground in the saline-alkali land, and the collecting tank is located below the water collecting pipe; the collecting tank is connected with an inlet pipe and an outlet pipe, wherein the inlet pipe is connected with the water collecting pipe at one end away from the collecting tank, and the outlet pipe is connected with the inside of the fertilizer pool at one end away from the collecting tank; the collecting pipe is laid in a horizontal direction, and a plurality of water permeable holes are provided on the top of the collecting pipe, and the water permeable holes are provided at intervals along the length direction of the collecting pipe; a first pressure pump and an opening and closing valve are provided on the outlet pipe, and a second pressure pump is provided on the drip irrigation pipe.

[0007] By adopting the above technical solution, rainwater penetrates into the water collection pipe through the permeable holes and flows into the collection tank through the water inlet pipe. The flow process utilizes the pressure difference between the inside and outside of the collection tank. In severe saline-alkali land, at the beginning of rain, the soil has been in a saline-alkali state for a long time, and its pores contain a high concentration of saline-alkali components. When rainwater begins to penetrate, the gaps between soil particles will be filled with rainwater. Because the soil structure of saline-alkali land is relatively compact, the penetration rate of rainwater is relatively slow. At this time, the water pressure in the soil outside the collection tank and the water collection pipe will gradually increase. Due to the accumulation of rainwater and the poor permeability of the soil, a high water pressure area will be formed. Rainwater is collected in the collection tank. When irrigation is needed, the first pressure pump cooperates with the outlet pipe to pump the collected rainwater from the collection tank to the fertilizer pool, add fertilizer to the fertilizer pool, and then use the second pressure pump and drip irrigation pipe to accurately drip the vegetation, so as to improve the utilization rate of natural precipitation and achieve the integrated effect of rainwater collection, irrigation, and fertilization.

[0008] Optionally, a one-way valve is installed on the water inlet pipe.

[0009] By adopting the above technical solution, the water pressure inside the storage tank will rise rapidly as rainwater flows in. When the internal water level reaches a certain height, the growth rate of the internal water pressure will gradually balance the growth rate of the external water pressure. This is because the water inflow of the storage tank and the infiltration of the external soil have reached a dynamic balance to a certain extent. The presence of the one-way valve prevents rainwater inside the storage tank from flowing back to the outside of the storage tank.

[0010] Optionally, the water inlet pipe and the water outlet pipe are both arranged vertically, and a pressurizing mechanism is provided on the collecting tank, which includes a partition plate, a motor, a drive pipe and a start-stop button. The partition plate is located in the collecting tank and the circumferential outer wall is in sliding contact with the inner wall of the collecting tank. The drive pipe, the water inlet pipe and the water outlet pipe all pass through the partition plate. The drive pipe is arranged vertically and is threadedly connected to the partition plate. The water inlet pipe and the water outlet pipe are slidably connected to the partition plate. The motor is used to provide power for the rotation of the drive pipe, and the start-stop button is used to control the start and stop of the motor.

[0011] By adopting the above technical solution, the water inlet pipe and the water outlet pipe are both vertically arranged and pass through the partition board, which plays a role in limiting the partition board and restricting the horizontal rotation posture of the partition board. The motor drives the driving pipe to rotate, and the driving pipe and the partition board are in a threaded connection state. Finally, the partition board begins to move upward, and the pressure under the partition board becomes smaller, so that the originally balanced water pressure inside and outside the storage tank becomes unbalanced again, and the rainwater outside the storage tank can be gathered into the inside of the storage tank again, thereby improving the utilization rate of the internal space of the storage tank.

[0012] Optionally, a downward pressure assembly is arranged between the motor and the driving tube, and the downward pressure assembly includes a positioning tube, a vertical rod, a cage gear, a special-shaped gear ring, a spur gear and a spur gear ring. The positioning tube is arranged vertically and the top end protrudes from the ground. The bottom end of the positioning tube is inserted into the collecting tank and is rotatably connected to the top of the driving tube. The driving tube rotates relative to the positioning tube. The center lines of the vertical rod, the driving tube and the positioning tube are colinear. The top end of the vertical rod protrudes from the top end of the positioning tube, and the bottom end of the vertical rod penetrates through the positioning tube and penetrates deep into the driving tube to be fixed to the cage gear. The special-shaped gear ring is fixed on the inner wall of the driving tube for meshing with the cage gear. The spur gear ring sleeve is fixed on the area where the vertical rod protrudes from the top end of the positioning tube. The spur gear is fixed to the output end of the motor, and the spur gear meshes with the spur gear ring.

[0013] By adopting the above technical solution, the setting of the downward pressure component makes the state of rotation of the starting motor and the driving tube become controllable. Only when the special-shaped gear ring is engaged with the cage gear, the starting motor can rotate the driving tube. The motor drives the vertical rod to rotate through the spur gear and the spur gear ring, and the vertical rod drives the driving rod to rotate through the special-shaped gear ring and the cage gear.

[0014] Optionally, a spring is ringed on the vertical rod, the top of the spring is fixed to the bottom of the spur gear ring, and the bottom of the spring is fixed to the top of the positioning tube; a pedal is fixed to the top of the vertical rod, the bottom of the pedal is used to press down the start-stop button, and the vertical rod is set to slide in the vertical direction relative to the positioning tube and the driving tube.

[0015] By adopting the above technical solution, when the pedal is pressed down, the vertical rod moves downward, the spring is compressed, the cage gear meshes with the special-shaped gear ring, the start-stop button is pressed down on the bottom of the pedal, the motor starts, and the rotation of the drive tube is realized. After the operator's foot leaves the pedal, the spring drives the vertical rod to move upward, completing the stop action of the motor.

[0016] Optionally, the circumferential edge of the cage gear is in sliding contact with the inner wall of the driving tube, and a notch is provided on the cage gear for the special-shaped gear ring to penetrate the cage gear in the vertical direction.

[0017] By adopting the above technical solution, the circumferential edge of the cage gear slides against the inner wall of the driving tube to limit the position of the vertical rod inside the driving tube and the positioning tube, ensuring the stability of the vertical rod position. The setting of the notch provides a disengagement channel for the cage gear to disengage from the special-shaped gear ring.

[0018] Optionally, a pad is fixed on the positioning tube, the top end of the positioning tube passes through the pad, the pad is fixed on the ground of the saline-alkali land, and the motor and the start-stop button are both fixed on the pad.

[0019] By adopting the above technical solution, the pad provides an installation location for the motor and the start-stop button, avoiding moisture or rain on the saline-alkali surface.

[0020] Optionally, a left shell and a right shell are slidably arranged on the pad, and the left shell and the right shell slide in a direction approaching or moving away from each other; the edges of the left shell and the right shell close to each other abut against each other to form a covering space, and the motor, start-stop button and spur gear ring are all located between the left shell and the right shell.

[0021] By adopting the above technical solution, the setting of the left shell and the right shell forms a protective space for the motor, the start-stop button and the spur gear ring to avoid erosion by rainwater.

[0022] Optionally, the edges of the left shell and the right shell that are close to each other are magnetically adsorbed.

[0023] By adopting the above technical solution, magnetic adsorption makes the merging or separation of the left shell and the right shell more convenient.

[0024] Optionally, when the start-stop button of the pedal is pressed down, the left shell and the right shell move toward each other until a contact area is generated with the top edge of the pedal to limit the upward movement of the pedal.

[0025] By adopting the above technical solution, when the operator steps on the pedal to start the motor, the operator wants to temporarily leave the pedal. By sliding the left shell and the right shell, the left shell and the right shell vertically limit the top of the pedal, thereby keeping the pedal pressing down on the start-stop button.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. Rainwater is collected in the collection tank. When irrigation is needed, the first pressure pump cooperates with the outlet pipe to pump the collected rainwater from the collection tank to the fertilizer pool. Fertilizer is added to the fertilizer pool and then the second pressure pump and drip irrigation pipe are used to accurately drip the vegetation, so as to improve the utilization rate of natural precipitation and achieve the integrated effect of rainwater collection, irrigation and fertilization. 2. The setting of the pressing assembly makes the state of the starter motor and thus the drive tube rotation become controllable. Only when the special-shaped gear ring is meshed with the cage gear, the starter motor can make the drive tube rotate; 3. After the operator steps on the pedal to start the motor, the operator wants to temporarily leave the pedal and slides the left shell and the right shell so that the left shell and the right shell vertically limit the top of the pedal, thereby keeping the pedal pressing down on the start-stop button. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 This is a schematic diagram showing the location of the water holes; Figure 3 It is a partial structural cross-sectional view to show the location of the motor and the internal structure of the storage tank; Figure 4 yes Figure 3A partial enlarged schematic diagram of part A.

[0028] In the figure, 1, storage tank; 11, water inlet pipe; 111, one-way valve; 12, water outlet pipe; 121, first pressure pump; 122, opening and closing valve; 2, water collecting pipe; 21, water permeable hole; 3, fertilization tank; 4, drip irrigation pipe; 41, second pressure pump; 5, pressurizing mechanism; 51, partition plate; 52, motor; 53, drive pipe; 54, start-stop button; 6, pressing assembly; 61, positioning pipe; 62, vertical rod; 621, spring; 622, pedal; 63, cage gear; 631, notch; 64, special-shaped gear ring; 65, spur gear; 66, spur gear ring; 7, pad; 71, left shell; 72, right shell. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 4 This application is described in further detail.

[0030] The embodiment of the present application discloses a saline-alkali land rainwater collection, irrigation and fertilization integrated system.

[0031] refer to Figure 1 A saline-alkali land rainwater collection, irrigation and fertilization integrated system includes a collection tank 1, a water collection pipe 2, a drip irrigation pipe 4 and a fertilization pool 3. The collection tank 1 and the water collection tank are buried under the surface of the saline-alkali land, and the drip irrigation pipe 4 and the fertilization pool 3 are arranged on the surface of the saline-alkali land. The collection tank 1 is provided with an inlet pipe 11 and an outlet pipe 12. The inlet pipe 11 and the outlet pipe 12 are both arranged vertically. The water collection pipe 2 is located above the collection tank 1. The top of the inlet pipe 11 is connected to the inside of the water collection pipe 2. The bottom of the inlet pipe 11 penetrates into the inside of the collection tank 1 and is close to the bottom of the collection tank 1. The bottom of the outlet pipe 12 penetrates into the inside of the collection tank 1 and is close to the bottom of the collection tank 1. The top of the outlet pipe 12 is connected to the inside of the fertilization pool 3. The outlet pipe 12 is provided with a first pressure pump 121 and an opening and closing valve 122. One end of the drip irrigation pipe 4 extends deep into the fertilization pool 3 , and a second pressure pump 41 is provided on the drip irrigation pipe 4 .

[0032] refer to Figure 1 and Figure 2 The water collecting pipe 2 is provided with a plurality of water permeable holes 21, which are located at the top of the water collecting pipe 2 and are spaced apart from each other along the length of the water collecting pipe 2. A one-way valve 111 is provided on the water inlet pipe 11, which only allows rainwater to flow into the collection tank 1.

[0033] refer to Figure 2 and Figure 3The rainwater penetrates into the saline-alkali land, enters the water collecting pipe 2 through the water permeable hole 21, and then enters the collection tank 1 through the water inlet pipe 11. When drip irrigation of vegetation is required, turn the opening and closing valve 122, and the first pressure pump 121 cooperates with the outlet pipe 12 to pump the rainwater in the collection tank 1 into the fertilization pool 3. After adding the corresponding fertilizer to the fertilization pool 3, the second pressure pump 41 cooperates with the drip irrigation pipe 4 to pump the liquid in the fertilization pool 3 and drip irrigate it on the corresponding vegetation.

[0034] refer to Figure 2 and Figure 3 A pressurizing mechanism 5 is provided on the storage tank 1. After the pressure inside and outside the storage tank 1 is balanced, the pressurizing mechanism 5 is started to change the pressure inside the storage tank 1, so that the rainwater outside the storage tank 1 continues to flow into the storage tank 1.

[0035] refer to Figure 2 , Figure 3 and Figure 4 The pressurizing mechanism 5 includes a partition plate 51, a motor 52, a driving pipe 53 and a start / stop button 54. A pressing assembly 6 is arranged between the motor 52 and the driving pipe 53. The pressing assembly 6 includes a positioning pipe 61, a vertical rod 62, a cage gear 63, a special-shaped gear ring 64, a spur gear 65 and a spur gear ring 66. The vertical rod 62, the driving pipe 53 and the positioning pipe 61 are all arranged vertically and their center lines are collinear. The positioning pipe 61 is located above the driving pipe 53. The driving pipe 53 is rotatably arranged in the storage tank 1. The positioning pipe 61 is fixed on the saline-alkali land. The bottom end of the positioning pipe 61 passes through the top of the storage tank 1 and is rotatably connected with the driving pipe 53. The rotation axis of the driving pipe 53 is its own vertical center axis. The top end of the positioning pipe 61 extends out of the surface of the saline-alkali land. A pad 7 is arranged on the positioning pipe 61. The top end of the positioning pipe 61 passes through the pad 7, and the pad 7 is fixed on the surface of the saline-alkali land. Both ends of the driving pipe 53 and the positioning pipe 61 are in a closed state.

[0036] refer to Figure 2 and Figure 3 The partition plate 51 is located in the storage tank 1 and its circumferential outer wall is in sliding contact with the inner wall of the storage tank 1. The partition plate 51 slides in the vertical direction relative to the storage tank 1. The driving pipe 53, the water inlet pipe 11 and the water outlet pipe 12 all pass through the partition plate 51. The driving pipe 53 is threadedly connected to the partition plate 51. The water inlet pipe 11 and the water outlet pipe 12 are slidably connected to the partition plate 51.

[0037] refer to Figure 2 and Figure 3The motor 52 and the start / stop button 54 are both fixed on the top of the pad 7, and the output end of the motor 52 is fixedly connected to the spur gear 65. The top of the vertical rod 62 extends out of the top of the positioning tube 61, and a pedal 622 is fixed to the top of the vertical rod 62. A spur gear ring 66 is fixed on the outer wall of the vertical rod 62, and the spur gear ring 66 is located between the pedal 622 and the top of the positioning tube 61, and the spur gear ring 66 is meshed with the spur gear 65. A spring 621 is sleeved on the vertical rod 62, and the top of the spring 621 is fixedly connected to the bottom surface of the spur gear ring 66, and the bottom end of the spring 621 is fixedly connected to the top end surface of the positioning tube 61. The vertical rod 62 is slidably arranged in the vertical direction relative to the positioning tube 61 and the driving tube 53, and the sliding distance of the vertical rod 62 does not exceed the vertical thickness of the spur gear ring 66, that is, the spur gear ring 66 and the spur gear 65 are always in meshing state during the sliding of the vertical rod 62.

[0038] refer to Figure 3 and Figure 4 The bottom end of the vertical rod 62 is fixedly connected to the cage gear 63, and the circumferential side wall of the cage gear 63 is in sliding contact with the inner wall of the driving tube 53. A notch 631 is provided on the cage gear 63, and the notch 631 extends from the edge of the cage gear 63 to the center. The profiled gear ring 64 is fixed on the inner wall of the driving tube 53. When the vertical rod 62 drives the cage gear 63 to move in the vertical direction, the profiled gear ring 64 is engaged or separated with the cage gear 63 through the notch 631.

[0039] refer to Figure 3 , a left shell 71 and a right shell 72 are slidably arranged on the pad 7, and the left shell 71 and the right shell 72 are distributed on both sides of the vertical rod 62, and the left shell 71 and the right shell 72 move in the direction of approaching or moving away from each other, and the edges of the left shell 71 and the right shell 72 that are close to each other are made of magnetic material, that is, the edge of the left shell 71 has anode magnetism, and the edge of the right shell 72 has cathode magnetism, and the edges of the left shell 71 and the right shell 72 that are close to each other are in a magnetic adsorption state after abutting. When the spring 621 is in a natural state, the space formed by the abutting edges of the left shell 71 and the right shell 72 that are close to each other covers the motor 52, the spur gear 65, the spur gear ring 66, the start-stop button 54 and the spring 621, and at this time, the top of the left shell 71 and the right shell 72 is located between the pedal 622 and the top of the spur gear ring 66.

[0040] refer to Figure 3 and Figure 4 When the spring 621 is in a compressed state, the operator steps on the pedal 622, the cage gear 63 meshes with the special-shaped gear ring 64, and the bottom of the pedal 622 presses the start-stop button 54. At this time, the motor 52 starts, and after the edges of the left shell 71 and the right shell 72 approach each other, the top of the left shell 71 and the right shell 72 abut against the top surface of the pedal 622 to limit the upward movement of the pedal 622.

[0041] refer to Figure 2The sliding modes of the left shell 71 and the right shell 72 on the pad 7 are not unique, and can be implemented by the combination of a slide groove and a slider, or by a slide rail, and no more examples are given.

[0042] The implementation principle of the integrated system for rainwater collection, irrigation and fertilization in saline-alkali land of the present application is as follows: rainwater penetrates into the saline-alkali land, enters the water collection pipe 2 through the water permeable hole 21, and then enters the collection tank 1 through the water inlet pipe 11, until the pressure inside and outside the collection tank 1 is balanced, the motor 52 is started, the pedal 622 is stepped on, and the position of the partition plate 51 is changed, so that the water pressure inside and outside the collection tank 1 that was originally balanced becomes unbalanced again, and the rainwater outside the collection tank 1 can be collected into the collection tank 1 again. When it is necessary to drip irrigate the vegetation, turn the opening and closing valve 122, and the first pressure pump 121 cooperates with the outlet pipe 12 to pump the rainwater in the collection tank 1 into the fertilization pool 3. After adding the corresponding fertilizer to the fertilization pool 3, the second pressure pump 41 cooperates with the drip irrigation pipe 4 to pump the liquid in the fertilization pool 3 and drip irrigate it at the corresponding vegetation, so as to improve the utilization rate of natural precipitation and achieve the integrated effect of rainwater collection, irrigation and fertilization.

[0043] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A saline-alkali land rainwater collection, irrigation and fertilization integrated system, comprising a drip irrigation pipe (4) and a fertilization pool (3), wherein the drip irrigation pipe (4) is laid on the saline-alkali land and one end thereof extends into the fertilization pool, and wherein: It also comprises a water collecting pipe (2) and a collecting tank (1), wherein the water collecting pipe (2) and the collecting tank (1) are both buried underground in saline-alkali land, and the collecting tank (1) is located below the water collecting pipe (2); the collecting tank (1) is connected to a water inlet pipe (11) and a water outlet pipe (12), wherein the end of the water inlet pipe (11) away from the collecting tank (1) is connected to the water collecting pipe (2), and the end of the water outlet pipe (12) away from the collecting tank (1) is connected to the inside of a fertilizer distribution tank; the water collecting pipe (2) is laid in a horizontal direction, and a plurality of water permeable holes (21) are provided on the top of the water collecting pipe (2), and the water permeable holes (21) are provided at intervals along the length direction of the water collecting pipe (2); the water outlet pipe (12) is provided with a first pressure pump (121) and an on-off valve (122), and the drip irrigation pipe (4) is provided with a second pressure pump (41).

2. The saline-alkali land rainwater collection, irrigation and fertilization integrated system according to claim 1, characterized in that: A one-way valve (111) is installed on the water inlet pipe (11).

3. The saline-alkali land rainwater collection, irrigation and fertilization integrated system according to claim 1, characterized in that: The water inlet pipe (11) and the water outlet pipe (12) are both arranged vertically. The storage tank (1) is provided with a pressurizing mechanism (5), which comprises a partition plate (51), a motor (52), a drive pipe (53) and a start / stop button (54). The partition plate (51) is located in the storage tank (1) and its circumferential outer wall is in sliding contact with the inner wall of the storage tank (1). The drive pipe (53), the water inlet pipe (11) and the water outlet pipe (12) all penetrate the partition plate (51). The drive pipe (53) is arranged vertically and is threadedly connected to the partition plate (51). The water inlet pipe (11) and the water outlet pipe (12) are slidably connected to the partition plate (51). The motor (52) is used to provide power for the self-rotation of the drive pipe (53). The start / stop button (54) is used to control the start / stop of the motor (52).

4. The saline-alkali land rainwater collection, irrigation and fertilization integrated system according to claim 3 is characterized by: A pressing assembly (6) is arranged between the motor (52) and the driving tube (53), and the pressing assembly (6) comprises a positioning tube (61), a vertical rod (62), a cage gear (63), a special-shaped gear ring (64), a spur gear (65) and a spur gear ring (66). The positioning tube (61) is arranged vertically and the top end thereof protrudes from the ground. The bottom end of the positioning tube (61) penetrates into the collecting tank (1) and is rotatably connected to the top of the driving tube (53). The driving tube (53) rotates relative to the positioning tube (61). The vertical rod (62), the driving tube (53) and the positioning tube (61) are connected to each other. The center lines of the three are collinear, the top end of the vertical rod (62) extends out of the top end of the positioning tube (61), the bottom end of the vertical rod (62) penetrates the positioning tube (61) and penetrates into the driving tube (53) to be fixed with the cage gear (63), the special-shaped ring gear (64) is fixed on the inner wall of the driving tube (53) to mesh with the cage gear (63), the spur gear ring (66) is fixed in a ring sleeve on the area where the vertical rod (62) extends out of the top end of the positioning tube (61), the spur gear (65) is fixed to the output end of the motor (52), and the spur gear (65) meshes with the spur gear ring (66).

5. The saline-alkali land rainwater collection, irrigation and fertilization integrated system according to claim 4 is characterized by: A spring (621) is sleeved on the upper ring of the vertical rod (62), the top end of the spring (621) is fixed to the bottom surface of the spur gear ring (66), and the bottom end of the spring (621) is fixed to the top end of the positioning tube (61); a pedal (622) is fixed to the top end of the vertical rod (62), the bottom surface of the pedal (622) is used to press down the start / stop button (54), and the vertical rod (62) is slidably arranged in the vertical direction relative to the positioning tube (61) and the driving tube (53).

6. The saline-alkali land rainwater collection, irrigation and fertilization integrated system according to claim 5, characterized in that: The circumferential edge of the cage gear (63) is in sliding contact with the inner wall of the driving tube (53), and a notch (631) is provided on the cage gear (63) for the special-shaped gear ring (64) to penetrate the cage gear (63) in the vertical direction.

7. The saline-alkali land rainwater collection, irrigation and fertilization integrated system according to claim 5, characterized in that: A backing plate (7) is fixed on the positioning tube (61), the top end of the positioning tube (61) passes through the backing plate (7), the backing plate (7) is fixed on the ground of the saline-alkali land, and the motor (52) and the start / stop button (54) are both fixed on the backing plate (7).

8. The saline-alkali land rainwater collection, irrigation and fertilization integrated system according to claim 7, characterized in that: A left shell (71) and a right shell (72) are slidably disposed on the pad (7), and the left shell (71) and the right shell (72) slide in a direction approaching or moving away from each other; the edges of the left shell (71) and the right shell (72) approaching each other abut against each other to form a covering space, and the motor (52), the start / stop button (54) and the spur gear ring (66) are all located between the left shell (71) and the right shell (72).

9. The saline-alkali land rainwater collection, irrigation and fertilization integrated system according to claim 8, characterized in that: The edges of the left shell (71) and the right shell (72) that are close to each other are magnetically adsorbed.

10. The saline-alkali land rainwater collection, irrigation and fertilization integrated system according to claim 8, characterized in that: When the pedal (622) presses the start / stop button (54), the left shell (71) and the right shell (72) move towards each other until a contact area is formed with the top edge of the pedal (622) to limit the upward movement of the pedal (622).

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