A root infiltration irrigation device suitable for fruit tree economic forests

Abstract

The invention discloses a technical field of fruit tree infiltration irrigation equipment, specifically a root infiltration irrigation equipment suitable for fruit tree economic forests, comprising a main water pipe and a branch pipe, wherein the side of the main water pipe is connected with the branch pipe through a pipe joint, a light sensor is installed on the branch pipe through a bracket, the side of the branch pipe is connected with a hose through a pipe joint, the end of the hose away from the branch pipe is connected with a pressure compensation dripper through the pipe joint, a plurality of root irrigation pipes are arranged on the side of the branch pipe, and a plurality of water outlet holes are equidistantly opened on the side of the root irrigation pipe. The beneficial effects of the invention are as follows: the root irrigation pipe is inserted obliquely into the soil next to the fruit tree so that most of the root irrigation pipe is in the soil, the root irrigation pipe can be conveniently inserted into the soil through the arranged spiral plate, and there is no need for elaborate operations such as digging a pit, and the installation is simple and convenient. When it is necessary to clean the silt and soil in the root irrigation pipe, the cleaning mechanism is pulled out from the root irrigation pipe, and the silt and soil in the root irrigation pipe are cleaned out through the arranged circular scraper.

Description

Technical Field

[0001] The invention relates to the technical field of fruit tree infiltration irrigation equipment, in particular to root infiltration irrigation equipment suitable for fruit tree economic forests. Background Art

[0002] In the process of fruit tree planting, it is necessary to fertilize and water the fruit trees from time to time. The traditional way of watering fruit trees is mostly flooding, which can easily cause the soil around the fruit trees to become compacted, thereby reducing the permeability of the soil and easily causing the root rot of the trees. At the same time, the water and fertilizer are unevenly applied, and the volatilization and loss of water resources are also serious. The existing solution is to bury pipes around the fruit trees for infiltration irrigation, which requires trenching and landfilling, with high investment costs, and complex construction and maintenance; the existing infiltration irrigation pipe structure is relatively simple, and most of them only open water holes around the pipes. In actual use, the water holes around the insert pipes are prone to blockage, which causes slow infiltration irrigation or even failure to perform infiltration irrigation, which does not achieve the expected effect, and is not conducive to the growth of fruit trees. In addition, the existing pipes do not have dredging mechanisms such as silt, and the pipes need to be dug out every time they are cleaned, which has high maintenance costs. When the pipes are blocked and cannot be infiltrated, the existing infiltration irrigation equipment cannot remind in time. Summary of the invention

[0003] The object of the present invention is to provide a root infiltration irrigation device suitable for fruit tree economic forests to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a root infiltration irrigation device suitable for fruit economic forests, comprising a main water pipe and a branch pipe, the side of the main water pipe is connected to the branch pipe through a pipe joint, the branch pipe is installed with a light sensor through a bracket, the side of the branch pipe is connected to a hose through a pipe joint, the end of the hose away from the branch pipe is connected to a pressure compensating dripper through a pipe joint, a plurality of root irrigation pipes are arranged on the side of the branch pipe, a plurality of water outlet holes are equidistantly opened on the side of the root irrigation pipe, the side of the root irrigation pipe is welded to a spiral plate, the upper end of the root irrigation pipe is symmetrically welded to a handle, the lower end of the root irrigation pipe is welded to a cone head, the upper end of the root irrigation pipe is welded to a connecting pipe, the upper end of the connecting pipe is welded to an external threaded sleeve, a cleaning mechanism is installed on the inner side of the root irrigation pipe, a blockage warning mechanism is installed on the side of the root irrigation pipe, a connecting assembly is installed on the upper end of the connecting pipe, and a sealing mechanism is installed in the connecting groove in the connecting assembly.

[0005] Preferably, the root irrigation pipe is inserted into the ground at an angle, and the spiral plate is spirally connected to the ground.

[0006] Preferably, the cleaning mechanism comprises: a circular scraper, a support frame and a handle, a circular scraper is arranged in the root irrigation pipe, the upper end of the circular scraper is welded to the support frame, and the upper end of the support frame is welded to the handle.

[0007] Preferably, the circular scraper is slidably connected to the inner cavity of the root irrigation pipe, and the support frame and the water outlet are staggered.

[0008] Preferably, the blockage warning mechanism includes: a water outlet pipe, a water tank, a first airbag, an airflow whistle and a second airbag, the side of the root irrigation pipe is welded to the water outlet pipe, the upper end of the water outlet pipe is welded to the water tank, the first airbag is installed on the inner side of the water tank, and the airflow whistle and the second airbag are installed on the upper end of the first airbag.

[0009] Preferably, the upper end of the first airbag is bonded to the upper end of the water tank, and the upper end of the first airbag passes through the upper side of the water tank and extends to the outside.

[0010] Preferably, the lower end of the second airbag is welded to the connecting air pipe, the lower end of the connecting air pipe is inserted through the upper end of the first airbag, and the connecting air pipe is bonded to the first airbag.

[0011] Preferably, the connecting assembly includes: a water inlet pipe, a connecting groove, a groove, an internal thread, a vent pipe, a tapered pipe, a support plate, a plug, a fixing ring and a connector. The water inlet pipe is installed above the connecting pipe, a connecting groove is provided on the inner side of the water inlet pipe, grooves are symmetrically provided on the inner side of the connecting groove, an internal thread is provided on the upper end of the water inlet pipe, a vent pipe is inserted through the side of the groove, one end of the vent pipe is welded to the tapered pipe, the connecting groove is welded to the support plate, the lower end of the water inlet pipe is integrally provided with a plug, a fixing ring is welded on the outer side of the plug, and a connector is sleeved on the plug.

[0012] Preferably, the pressure compensating dripper is threadedly connected to the internal thread, the insert is plugged into the connecting pipe, and the connector is threadedly connected to the external thread sleeve.

[0013] Preferably, the sealing mechanism includes: a water stopper, a sealing block, a sliding rod and a sealing spring, the water stopper is slidably connected in the connecting groove, the sealing blocks are symmetrically welded on the sides of the water stopper, the sliding rod is welded on the lower end of the water stopper, the sliding rod is sleeved with a sealing spring, the sealing block is slidably connected to the groove, the sliding rod is slidably connected to the support plate, and the sealing spring is arranged between the support plate and the water stopper.

[0014] Compared with the prior art, the invention has the following advantages:

[0015] 1. The root irrigation pipe is inserted obliquely into the soil next to the fruit tree so that most of the root irrigation pipe is in the soil. The spiral plate is provided so that the root irrigation pipe can be conveniently inserted into the soil without the need for elaborate operations such as digging holes. The installation is simple and convenient. When the silt and soil in the root irrigation pipe need to be cleaned, the cleaning mechanism is pulled out from the root irrigation pipe and the silt and soil in the root irrigation pipe are cleaned out by the circular scraper, thereby preventing the silt and soil from accumulating in the root irrigation pipe, thereby preventing the water outlet holes on the side of the root irrigation pipe from being blocked, and ensuring the effect of root irrigation of the fruit tree;

[0016] 2. Water is introduced into the branch pipe through the main water pipe, and the water enters the water inlet pipe through the hose. When the water flows continuously into the water inlet pipe, the water pressure pushes the sealing mechanism to move downward, so that the sealing block moves downward along the groove, and the vent pipe is sealed by the sealing block. When the water retaining plug moves downward to not contact the inside of the water inlet pipe, the water flows downward along the gap between the water retaining plug and the water inlet pipe, and the water flows into the connecting pipe and the root irrigation pipe through the insert pipe. Finally, the water penetrates into the soil through the water outlet hole on the side of the root irrigation pipe, thereby realizing infiltration irrigation of the roots of the fruit trees;

[0017] 3. When the water outlet on the side of the root irrigation pipe is seriously blocked, the water source cannot penetrate into the soil in time. At this time, the water source enters the water tank along the water outlet pipe, and at the same time, the water source squeezes the first airbag, and the airflow in the first airbag is squeezed out. At this time, the airflow enters the second airbag along the connecting air pipe, making the second airbag bulge. At the same time, the airflow blows the airflow whistle, thereby reminding the worker that the water outlet on the side of the root irrigation pipe is blocked;

[0018] 4. When there is no need to infiltrate the roots of fruit trees, the sealing block in the sealing mechanism is separated from the vent pipe. At this time, the air from the external environment can enter the water inlet pipe along the conical pipe and the vent pipe, and then enter the root irrigation pipe through the insert pipe and the connecting pipe, so that the roots of the fruit trees can be well ventilated and breathable; through the light sensor installed on the branch pipe, the control component detects the light intensity through the light sensor, judges the evaporation of water in the fruit trees, and then controls the irrigation amount of the water pump, realizing intelligent irrigation, which is more in line with the growth of fruit trees, and at the same time can save water resources and avoid excessive irrigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the root irrigation equipment of the present invention;

[0020] Figure 2 This is a schematic diagram of the installation of the root irrigation equipment of the present invention;

[0021] Figure 3 It is a schematic cross-sectional view of the root irrigation equipment structure of the present invention;

[0022] Figure 4 for Figure 3 A schematic diagram of the structure enlargement in the middle;

[0023] Figure 5 It is a cross-sectional schematic diagram of the root irrigation pipe structure of the present invention;

[0024] Figure 6 Schematic diagram of the cleaning mechanism structure of the present invention

[0025] Figure 7 This is a schematic diagram of the structure of the root irrigation pipe and the blockage warning mechanism of the present invention;

[0026] Figure 8 It is an exploded view of the water inlet pipe, the insert pipe and the sealing mechanism structure of the present invention.

[0027] In the figure: 1. main water pipe; 11. branch pipe; 12. light sensor; 13. hose; 14. pressure compensating dripper; 2. root irrigation pipe; 21. water outlet; 22. spiral plate; 23. handle; 24. connecting pipe; 25. external thread sleeve; 26. cone head; 3. round scraper; 31. support frame; 32. handle; 4. water outlet pipe; 41. water tank; 42. first air bag; 43. air flow whistle; 44. second air bag; 5. water inlet pipe; 51. connecting groove; 52. groove; 53. internal thread; 54. ventilation pipe; 55. conical pipe; 56. support plate; 6. insert pipe; 61. fixing ring; 62. connector; 7. water stopper; 71. sealing block; 72. slide rod; 73. sealing spring. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figures 1 to 8The present invention provides a technical solution: a root infiltration irrigation device suitable for fruit tree economic forests, comprising a main water pipe 1 and a branch pipe 11, the side of the main water pipe 1 is connected to the branch pipe 11 through a pipe joint, a light sensor 12 is installed on the branch pipe 11 through a bracket, a hose 13 is connected to the side of the branch pipe 11 through a pipe joint, and one end of the hose 13 away from the branch pipe 11 is connected to a pressure compensation dripper 14 through a pipe joint, a plurality of root irrigation pipes 2 are arranged on the side of the branch pipe 11, a plurality of water outlet holes 21 are opened at equal intervals on the side of the root irrigation pipe 2, and the side of the root irrigation pipe 2 is welded to the spiral plate 22. The upper end of the root irrigation pipe 2 is symmetrically welded to the handle 23, and the lower end of the root irrigation pipe 2 is welded to the cone head 26. The root irrigation pipe 2 is inserted obliquely into the ground, and the spiral plate 22 is spirally connected to the ground. Two root irrigation pipes 2 are symmetrically and obliquely installed on the side of each fruit tree. By rotating the handle 23, the handle 23 drives the root irrigation pipe 2 to rotate, so that the spiral plate 22 is screwed downward along the soil, so that most of the root irrigation pipe 2 is in the soil. The root irrigation pipe 2 can be easily inserted into the soil through the set spiral plate 22, without the need for tedious operations such as digging holes. The installation is simple and convenient, saving costs.

[0030] The upper end of the root irrigation pipe 2 is welded to the connecting pipe 24, and the upper end of the connecting pipe 24 is welded to the external threaded sleeve 25. A cleaning mechanism is installed on the inner side of the root irrigation pipe 2, and the cleaning mechanism includes: a circular scraper 3, a support frame 31 and a handle 32. A circular scraper 3 is arranged in the root irrigation pipe 2, and the upper end of the circular scraper 3 is welded to the support frame 31, and the upper end of the support frame 31 is welded to the handle 32. The circular scraper 3 is slidably connected to the inner cavity of the root irrigation pipe 2, and the support frame 31 is staggered with the water outlet 21. By pulling the handle 32, the handle 32 drives the support frame 31 to slide outward along the inner side of the root irrigation pipe 2, and the support frame 31 drives the circular scraper 3 to slide outward along the root irrigation pipe 2, and the silt and soil in the root irrigation pipe 2 are cleaned out by the circular scraper 3.

[0031] A blockage warning mechanism is installed on the side of the root irrigation pipe 2, and the blockage warning mechanism includes: a water outlet pipe 4, a water tank 41, a first air bag 42, an air flow whistle 43 and a second air bag 44. The side of the root irrigation pipe 2 is welded to the water outlet pipe 4, and the upper end of the water outlet pipe 4 is welded to the water tank 41. The first air bag 42 is installed on the inner side of the water tank 41, and the upper end of the first air bag 42 is installed with an air flow whistle 43 and a second air bag 44. The upper end of the first air bag 42 is bonded to the upper end of the water tank 41, and the upper end of the first air bag 42 passes through the upper side of the water tank 41 and extends to the outside. The lower end of the second air bag 44 is welded to the connecting air pipe, and the lower end of the connecting air pipe is inserted and connected with the upper end of the first air bag 42, and the connecting air pipe is bonded to the first air bag 42. The air flow whistle 43 is threadedly connected to the upper end of the first air bag 42. By removing the air flow whistle 43 from the upper end of the first air bag 42, the first air bag 42 can be conveniently inflated.

[0032] The upper end of the connecting pipe 24 is equipped with a connecting assembly, which includes: an inlet pipe 5, a connecting groove 51, a groove 52, an internal thread 53, a vent pipe 54, a tapered pipe 55, a support plate 56, a plug 6, a fixing ring 61 and a connector 62. The water inlet pipe 5 is installed above the connecting pipe 24. The inner side of the water inlet pipe 5 is provided with a connecting groove 51, and the inner side of the connecting groove 51 is symmetrically provided with grooves 52. The upper end of the water inlet pipe 5 is provided with an internal thread 53, and the side of the groove 52 is penetrated and plugged with a vent pipe 54. One end of the vent pipe 54 is welded to the tapered pipe 55, and the inner side of the connecting groove 51 is welded to the support plate 56. The lower end of the water inlet pipe 5 is integrally formed. There is a cannula 6, a fixing ring 61 is welded on the outer side of the cannula 6, a connector 62 is sleeved on the cannula 6, a pressure compensating dripper 14 is threadedly connected to the internal thread 53, the cannula 6 is plugged into the connecting pipe 24, and the connector 62 is threadedly connected to the external threaded sleeve 25. Through the set pressure compensating dripper 14, water can evenly enter the water inlet pipe 5, and through the set connector 62, the water inlet pipe 5 and the connecting pipe 24 can be detachably connected, which is convenient for later maintenance. During installation, the connector 62 is connected to the external threaded sleeve 25, so that the fixing ring 61 and the upper end of the connecting pipe 24 are tightly fitted together, so that the cannula 6 and the connecting pipe 24 are sealed.

[0033] A sealing mechanism is installed in the connecting groove 51 in the connecting assembly, and the sealing mechanism includes: a water stopper 7, a sealing block 71, a sliding rod 72 and a sealing spring 73. The water stopper 7 is slidably connected in the connecting groove 51, and the sealing blocks 71 are symmetrically welded on the side of the water stopper 7, and the sliding rod 72 is welded at the lower end of the water stopper 7. The sealing spring 73 is sleeved on the sliding rod 72, the sealing block 71 is slidably connected to the groove 52, the sliding rod 72 is slidably connected to the support plate 56, the sealing spring 73 is arranged between the support plate 56 and the water stopper 7, and a limiting circular plate is welded at the lower end of the sliding rod 72. The sealing spring 73 applies an elastic force to the water stopper 7.

[0034] By obliquely inserting the root irrigation pipe 2 into the soil next to the fruit tree, two root irrigation pipes 2 are symmetrically installed on the side of each fruit tree, and by rotating the handle 23, the handle 23 drives the root irrigation pipe 2 to rotate, so that the spiral plate 22 is screwed downward along the soil, so that most of the root irrigation pipe 2 is in the soil. The root irrigation pipe 2 can be easily inserted into the soil through the set spiral plate 22, and there is no need for elaborate operations such as digging holes. The installation is simple and convenient, saving costs, and also saving maintenance costs. When it is necessary to infiltrate the fruit trees, water is introduced into the branch pipe 11 through the main water pipe 1, and the water source is passed through the hose 13 enters the water inlet pipe 5. When the water flow continuously flows into the water inlet pipe 5, the water pressure pushes the sealing mechanism to move downward, so that the sealing block 71 moves downward along the groove 52, and the vent pipe 54 is sealed by the sealing block 71 to prevent water from flowing out along the vent pipe 54. When the water retaining plug 7 moves downward to not contact the inside of the water inlet pipe 5, the water source flows downward along the gap between the water retaining plug 7 and the water inlet pipe 5, and the water flows into the connecting pipe 24 and the root irrigation pipe 2 through the insert pipe 6. Finally, the water source penetrates into the soil through the water outlet hole 21 on the side of the root irrigation pipe 2, thereby realizing infiltration irrigation of the roots of the fruit trees.

[0035] When the water outlet hole 21 on the side of the root irrigation pipe 2 is seriously blocked, the water source cannot penetrate into the soil in time. At this time, the water source enters the water tank 41 along the water outlet pipe 4 on the side of the root irrigation pipe 2, and the first air bag 42 is squeezed by the water source, and the air flow in the first air bag 42 is squeezed out. At this time, the air flow enters the second air bag 44 along the connecting air pipe, causing the second air bag 44 to swell, and at the same time, the air flow blows the air flow whistle 43 to sound, thereby reminding the workers that the water outlet hole 21 on the side of the root irrigation pipe 2 is blocked, so that the workers can quickly clean the root irrigation pipe 2. When it is necessary to clean the silt and soil in the root irrigation pipe 2, by pulling the handle 32, the handle 32 drives the support frame 31 to slide outward along the inner side of the root irrigation pipe 2, and the support frame 31 drives the circular scraper 3 to slide outward along the root irrigation pipe 2, and the silt and soil in the root irrigation pipe 2 are cleaned out by the circular scraper 3, thereby preventing Silt and soil accumulate in the root irrigation pipe 2, thereby preventing the water outlet 21 on the side of the root irrigation pipe 2 from being blocked, thereby ensuring the effect of infiltration irrigation of the fruit tree roots; when the roots of the fruit trees do not need to be infiltrated, the water retaining plug 7 in the sealing mechanism is in an initial state under the action of the elastic force of the sealing spring 73, and the sealing block 71 is separated from the vent pipe 54 at this time, so that the air from the external environment can enter the water inlet pipe 5 along the tapered pipe 55 and the vent pipe 54, and then enter the root irrigation pipe 2 through the insert pipe 6 and the connecting pipe 24, so that the roots of the fruit trees can be well ventilated; through the light sensor 12 installed on the branch pipe 11, the control component judges the evaporation of water in the fruit tree through the light intensity detected by the light sensor 12, and then controls the irrigation amount of the water pump, realizing intelligent irrigation, which is more in line with the growth of the fruit trees, and at the same time can save water resources and avoid excessive irrigation.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A root irrigation device suitable for fruit tree economic forests, comprising a main water pipe (1) and a branch pipe (11), characterized in that: The side of the main water pipe (1) is connected to a branch pipe (11) via a pipe joint, a light sensor (12) is mounted on the branch pipe (11) via a bracket, a hose (13) is connected to the side of the branch pipe (11) via a pipe joint, an end of the hose (13) away from the branch pipe (11) is connected to a pressure compensation dripper (14) via a pipe joint, a plurality of root irrigation pipes (2) are arranged on the side of the branch pipe (11), a plurality of water outlet holes (21) are equidistantly provided on the side of the root irrigation pipe (2), and the side of the root irrigation pipe (2) is welded to the screw. The upper end of the root irrigation pipe (2) is symmetrically welded to the handle (23), the lower end of the root irrigation pipe (2) is welded to the cone head (26), the upper end of the root irrigation pipe (2) is welded to the connecting pipe (24), the upper end of the connecting pipe (24) is welded to the external threaded sleeve (25), a cleaning mechanism is installed on the inner side of the root irrigation pipe (2), a blockage warning mechanism is installed on the side of the root irrigation pipe (2), a connecting assembly is installed on the upper end of the connecting pipe (24), and a sealing mechanism is installed in the connecting groove (51) of the connecting assembly; The connection assembly comprises: a water inlet pipe (5), a connecting groove (51), a groove (52), an internal thread (53), a vent pipe (54), a tapered pipe (55), a support plate (56), a plug pipe (6), a fixing ring (61) and a connector (62); the water inlet pipe (5) is installed above the connection pipe (24); the inner side of the water inlet pipe (5) is provided with a connecting groove (51); the inner side of the connecting groove (51) is symmetrically provided with grooves (52); the upper end of the water inlet pipe (5) is provided with an internal thread (53); the side of the groove (52) is provided with a thread (53); A vent pipe (54) is inserted through the water inlet pipe (55), one end of the vent pipe (54) is welded to the conical pipe (55), the connecting groove (51) is welded to the support plate (56), the lower end of the water inlet pipe (5) is integrally formed with a plug pipe (6), the outer side surface of the plug pipe (6) is welded with a fixing ring (61), and a connector (62) is sleeved on the plug pipe (6); the pressure compensation dripper (14) is threadedly connected to the internal thread (53), the plug pipe (6) is plugged into the connecting pipe (24), and the connector (62) is threadedly connected to the external thread sleeve (25); The sealing mechanism comprises: a water stopper (7), a sealing block (71), a sliding rod (72) and a sealing spring (73); the water stopper (7) is slidably connected in the connecting groove (51); the sealing block (71) is symmetrically welded to the side of the water stopper (7); the sliding rod (72) is welded to the lower end of the water stopper (7); the sealing spring (73) is sleeved on the sliding rod (72); the sealing block (71) is slidably connected to the groove (52); the sliding rod (72) is slidably connected to the support plate (56); and the sealing spring (73) is arranged between the support plate (56) and the water stopper (7).

2. The root infiltration irrigation equipment suitable for fruit tree economic forests according to claim 1 is characterized in that: The root irrigation pipe (2) is inserted obliquely into the ground, and the spiral plate (22) is spirally connected to the ground.

3. The root infiltration irrigation equipment suitable for fruit economic forests according to claim 1 is characterized in that: The cleaning mechanism comprises: a circular scraper (3), a support frame (31) and a handle (32); the circular scraper (3) is arranged in the root irrigation pipe (2); the upper end of the circular scraper (3) is welded to the support frame (31); and the upper end of the support frame (31) is welded to the handle (32).

4. The root infiltration irrigation equipment suitable for fruit tree economic forests according to claim 3 is characterized in that: The circular scraper (3) is slidably connected to the inner cavity of the root irrigation pipe (2), and the support frame (31) and the water outlet hole (21) are staggered.

5. The root infiltration irrigation equipment suitable for fruit tree economic forests according to claim 1 is characterized in that: The blockage warning mechanism comprises: a water outlet pipe (4), a water tank (41), a first air bag (42), an air flow whistle (43) and a second air bag (44); the side of the root irrigation pipe (2) is welded to the water outlet pipe (4); the upper end of the water outlet pipe (4) is welded to the water tank (41); the first air bag (42) is installed on the inner side of the water tank (41); and the air flow whistle (43) and the second air bag (44) are installed on the upper end of the first air bag (42).

6. The root irrigation equipment suitable for fruit economic forests according to claim 5 is characterized in that: The upper end of the first airbag (42) is bonded to the upper end of the water tank (41), and the upper end of the first airbag (42) penetrates the upper side of the water tank (41) and extends to the outside.

7. The root infiltration irrigation equipment suitable for fruit economic forests according to claim 5 is characterized in that: The lower end of the second airbag (44) is welded to the connecting air pipe, the lower end of the connecting air pipe is inserted through the upper end of the first airbag (42), and the connecting air pipe is bonded to the first airbag (42).

Images