CN117814057A - Ditching tectorial membrane all-in-one is used in planting of saline and alkaline land chinese-medicinal material - Google Patents

Abstract

The invention discloses a ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil, which comprises a bracket which is U-shaped; further comprises: the laying mechanism is arranged at one end in the bracket, the laying mechanism lays the mulch film, one end in the bracket is provided with a film pressing mechanism, and the film pressing mechanism presses the mulch film; the ditching mechanism is arranged on two sides of the film pressing mechanism, and ditching operation of saline-alkali soil is carried out by the ditching mechanism. This improved generation saline and alkaline land chinese-medicinal material is planted with ditching tectorial membrane all-in-one can once only accomplish the operation of laying of saline and alkaline land plastic film and the slot of plastic film both sides is seted up the operation, pours into the fat water into in many positions in the middle of the long soil simultaneously, carries out the improvement operation of earth soil property in the saline and alkaline land long soil to the earth of plastic film both sides limit and middle part covers, and device degree of automation is convenient operation, and device simple structure low in production cost.

Description

A trenching and film covering machine for Chinese medicinal materials planting in saline-alkali land

Technical Field

The invention relates to the technical field of a ditching and film-covering integrated machine for planting Chinese medicinal materials, and in particular to a ditching and film-covering integrated machine for planting Chinese medicinal materials in saline-alkali land.

Background technique

Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. According to incomplete statistics from UNESCO and FAO, the area of saline-alkali land in the world is 954.38 million hectares, of which 99.13 million hectares are in my country. In order to improve the utilization rate of land, some Chinese medicinal materials suitable for planting in saline-alkali land will be planted in saline-alkali land, such as licorice, raw earth, white thorn, Yuanshen, wolfberry, Cassia tora and other medicinal materials.

When planting Chinese medicinal materials in saline-alkali land, in order to keep the plants warm, a layer of film is usually attached to the ground, and grooves are opened on the planting ground to facilitate irrigation of the land, drainage of water in the land and subsequent fertilization operations. A grooving machine is usually used to make grooves on the ground, and then a film laying machine is used to lay the film on the ground. The operator then uses fertilizer to drip irrigate the saline-alkali land to improve the soil quality of the saline-alkali land, and finally the Chinese medicinal materials are planted. The operation is cumbersome and reduces the planting efficiency of Chinese medicinal materials in saline-alkali land.

Summary of the invention

The purpose of the present invention is to provide an all-in-one trenching and film covering machine for planting Chinese medicinal materials in saline-alkali land, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an integrated trenching and film covering machine for Chinese medicinal material planting in saline-alkali land, comprising a bracket arranged in a U-shape;

Also includes:

A laying mechanism, wherein the laying mechanism is arranged at one end of the bracket and performs laying of the ground film, and a film pressing mechanism is arranged at one end of the bracket and performs pressing of the ground film;

The trenching mechanism is arranged on both sides of the film pressing mechanism, and the trenching mechanism performs trenching operations on saline-alkali ground.

Preferably, the laying mechanism includes two rollers, and the outer peripheral wall of the roller is set as an inclined surface from the middle to both sides, one end of the bracket is penetrated by two threaded tubes through bearings for relative rotation, and the rollers are fixedly sleeved on the outer peripheral side of the corresponding threaded tubes, and the two rollers are both located in the bracket, a threaded rod is penetrated by the inner thread of the threaded tube, and the outer ring edges at both ends of the threaded rod are set in an arc shape.

By adopting the above technical solution, the setting of the inclined surface on the outer peripheral side of the roller makes it easier to insert part of the outer peripheral wall of the roller into the ground, so that the roller is constrained and limited by the mutual interference between the roller and the soil, so that the roller will not be displaced in a certain process to affect the use of the device.

Preferably, the ditching mechanism includes two fixed plates, which are relatively fixedly mounted on the outer wall of the bracket by bolts, a baffle is fixedly mounted on one side of the bottom of the fixed plate, and the opening of the baffle is flared, the two baffles are inclined, and the two baffles are relatively arranged, a rotary cutter is rotatably penetrated through the baffle via a bearing, and a motor for driving the rotary cutter to rotate is fixedly mounted on the other side of the bottom of the fixed plate.

By adopting the above technical solution, the baffle opening is expanded and inclined, so that a small amount of soil splashed by the rotary cutter moves into the circular tube opening, and most of the soil splashed by the rotary cutter falls on both sides of the ground film.

Preferably, the film pressing mechanism comprises a circular tube, which is arranged at the other end of the bracket, and the outer circumferential sides of the two open ends of the circular tube are fixedly sleeved with pressure rings, and the outer circumferential wall of each pressure ring is arranged in an arc shape.

By adopting the above technical solution, the setting of the pressure ring can press the two sides of the ground film into the ground in sequence along with the roller of the round tube, thereby facilitating the covering of the soil.

Preferably, the two openings of the circular tube are both flared, the inner wall of the circular tube is arc-shaped, and a circular hole is provided on the inner wall of the circular tube at a position corresponding to the middle of the inner arc wall of the circular tube.

By adopting the above technical solution, the setting of the circular holes can bury a certain amount of soil at equal intervals in the middle position of the top side of the ground film during the rolling of the circular tube, thereby enhancing the pressing effect of the ground film.

Preferably, a pressing plate is fixedly mounted on the outer circumferential wall of the circular tube at a position corresponding to the circular hole by adhesive, and the outer wall of the pressing plate is arranged in an arc shape.

By adopting the above technical solution, the setting of the pressing plate can press a pit equidistantly at the middle position of the top side of the ground film as the round tube rolls, so that subsequent fertilization can be carried out from the middle position of the soil.

Preferably, a plurality of soft rods are fixedly mounted on the outer arc surface of the pressure plate, and the spacing between two adjacent soft rods is equal, and honeycomb-shaped holes are opened in the soft rods.

By adopting the above technical solution, the soft rod with honeycomb holes can enhance the elasticity of the soft rod. The setting of the soft rod enables the conical block to adjust the angle to a certain extent, preventing the circular tube from lifting the ground film when rolling and affecting the laying of the ground film.

Preferably, a fixing block is fixedly mounted on one end of the soft rod away from the pressure plate, and the fixing block is conical.

By adopting the above technical solution, the conical fixed block and the soft rod can open dense holes in the pit, so that the ground film in this part can be torn more easily, which is convenient for the subsequent planting of plants.

Preferably, a water tank is fixedly inserted into the middle position of the circular tube, and two ends of the water tank respectively pass through the two ends of the bracket and are rotatably connected to the bracket through bearings, a one-way valve is rotatably inserted into the middle position of the water tank through a bearing, a pressing valve is fixedly inserted into the outer peripheral wall of the water tank at a position corresponding to the pressure plate, and the pressing end of the pressing valve passes through the pressure plate and is fixedly connected to the plate wall of the pressure plate and the tube wall of the circular tube.

By adopting the above technical solution and the setting of the one-way valve, the water storage tank can be connected to an external water tank, avoiding the operator's multiple operations of adding fertilizer water. The setting of the pressing valve and the water storage tank enables the appropriate amount of fertilizer water to be injected into the pit synchronously during the pit pressing process.

Compared with the prior art, the invention has the following beneficial effects: the improved trenching and film-covering integrated machine for Chinese medicinal materials planting in saline-alkali land can complete the laying operation of the ground film on the saline-alkali land and the trenching operation on both sides of the ground film at one time, and at the same time, inject fertilizer water at multiple positions in the middle of the raised soil to improve the soil quality in the saline-alkali land raised soil, and cover the soil on the two sides and the middle of the ground film. The device has a high degree of automation and is easy to operate, and the device has a simple structure and low production cost. The specific contents are as follows;

A laying mechanism, a furrowing mechanism and a film pressing mechanism are provided. The improved furrowing and film covering integrated machine for planting Chinese medicinal materials in saline-alkali land can lay the ground film at a suitable position on the saline-alkali land through the laying mechanism, and two furrows can be opened on both sides of the ground film while the ground film is being laid through the furrowing mechanism and the laying mechanism, and soil is pressed on the two sides of the ground film, and through the cooperation of the laying mechanism and the pressing mechanism, a number of shallow pits can be pressed in the middle position of the top side of the ground film, and densely distributed and extremely small holes can be opened in the shallow pits, and at the same time, a suitable amount of fertilizer water can be injected into the shallow pits to carry out fertilization treatment in the saline-alkali land, thereby improving the soil quality of the saline-alkali land, and through the cooperation of the laying mechanism, the furrowing mechanism and the film pressing mechanism, soil piles can be equidistantly arranged in the middle position of the top side of the ground film to press the ground film, thereby enhancing the stability of the ground film laying.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is an overall schematic diagram of the present invention;

FIG2 is a schematic diagram of the internal structure of a portion of the support of the present invention;

FIG3 is a schematic diagram of the internal structure of a circular tube according to the present invention;

FIG4 is a schematic diagram of the overall structure of the rotary cutter of the present invention;

FIG. 5 is a schematic diagram of the overall structure of a portion of a pressing plate of the present invention.

In the figure: 1. bracket; 2. laying mechanism; 21. roller; 22. threaded pipe; 23. threaded rod; 3. trenching mechanism; 31. fixing plate; 32. baffle; 33. rotary cutter; 34. motor; 4. film pressing mechanism; 41. round tube; 42. pressing ring; 43. round hole; 44. pressing plate; 45. soft rod; 46. fixing block; 47. water storage tank; 48. one-way valve; 49. pressing valve.

Detailed ways

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.

Embodiment 1: The present invention provides a technical solution: with reference to FIG1 , the present invention discloses a trenching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali land, comprising a U-shaped bracket 1, which is mounted on the rear end of the agricultural machinery by mounting; further comprising: a laying mechanism 2, which is arranged at one end of the bracket 1, and the laying mechanism 2 is used to lay the ground film, a film pressing mechanism 4 is provided at one end of the bracket 1, and the film pressing mechanism 4 is used to press the ground film; a trenching mechanism 3, which is arranged at both sides of the film pressing mechanism 4, and the trenching mechanism 3 performs trenching operations on the saline-alkali ground.

In a further preferred embodiment of the present invention, as shown in FIG1-2, the laying mechanism 2 includes two rollers 21, and the outer peripheral wall of the roller 21 is set as an inclined surface from the middle to both sides, one end of the bracket 1 is penetrated by two threaded tubes 22 for relative rotation through a bearing, and the roller 21 is fixedly sleeved on the outer peripheral side of the corresponding threaded tube 22, and the two rollers 21 are both located in the bracket 1, and the threaded tube 22 is threaded with a threaded rod 23, and the outer ring edges at both ends of the threaded rod 23 are set in an arc shape;

In this embodiment, the setting of the inclined surface on the outer peripheral side of the roller 21 makes it easier for a portion of the outer peripheral wall of the roller 21 to be inserted into the ground, so that the roller 21 is constrained and limited by the mutual interference between the roller 21 and the soil.

In a further preferred embodiment of the present invention, as shown in FIG. 1 and FIG. 4 , the trenching mechanism 3 includes two fixed plates 31, which are relatively fixedly mounted on the outer wall of the bracket 1 by bolts, a baffle 32 is fixedly mounted on one side of the bottom of the fixed plate 31, and the opening of the baffle 32 is flared, the two baffles 32 are inclined, and the two baffles 32 are relatively arranged, a rotary cutter 33 is rotatably penetrated through the baffle 32 through a bearing, the rotating rotary cutter 33 digs the soil on the ground and throws the soil in the direction of the opening of the baffle 32, and a motor 34 that drives the rotary cutter 33 to rotate is fixedly mounted on the other side of the bottom of the fixed plate 31;

In this embodiment, the opening of the baffle 32 is expanded and inclined, so that the rotary cutter 33 digs a small amount of splashed soil and moves it into the opening of the circular tube 41.

In a further preferred embodiment of the present invention, as shown in FIG1 , the film pressing mechanism 4 includes a round tube 41, which is made of a heavy metal material such as stainless steel or nickel alloy. The round tube 41 is arranged at the other end of the bracket 1, and the outer peripheral sides of the two open ends of the round tube 41 are fixedly sleeved with a pressing ring 42, and the outer peripheral wall of each pressing ring 42 is arranged in an arc shape;

In this embodiment, the arrangement of the pressure ring 42 can press parts of the two side edges of the ground film into the ground in sequence along with the roller 21 of the circular tube 41 to form linear pits.

In a further preferred embodiment of the present invention, as shown in FIG. 1 and FIG. 3 , the two openings of the circular tube 41 are both flared, the inner wall of the circular tube 41 is arc-shaped, and a circular hole 43 is provided on the inner wall of the circular tube 41 at a position corresponding to the middle of the inner arc wall of the circular tube 41;

In this embodiment, the circular holes 43 are arranged so that a certain amount of soil can be evenly buried at the middle position of the top side of the ground film during the rolling process of the circular tube 41.

In a further preferred embodiment of the present invention, as shown in FIG. 1 and FIG. 3 , a pressing plate 44 is fixedly mounted on the outer peripheral wall of the circular tube 41 at a position corresponding to the circular hole 43 by an adhesive, and the outer wall of the pressing plate 44 is arranged in an arc shape;

In this embodiment, the pressing plate 44 can be arranged to press a pit at an equidistant position at the middle position of the top side of the ground film as the round tube 41 rolls.

In a further preferred embodiment of the present invention, as shown in FIG. 1 , FIG. 3 and FIG. 5 , a plurality of soft rods 45 are fixedly mounted on the outer arc surface of the pressing plate 44 , and the spacing between two adjacent soft rods 45 is equal, the soft rods 45 are rubber rods, and honeycomb holes are opened in the soft rods 45 ;

In this embodiment, the soft rod 45 with honeycomb-shaped holes can enhance the elasticity of the soft rod 45 . The provision of the soft rod 45 enables the cone block to be adjusted in angle to a certain extent.

In a further preferred embodiment of the present invention, as shown in FIG. 5 , one end of the soft rod 45 away from the pressing plate 44 is fixedly mounted with a fixing block 46 by hot-melt fixing, and the fixing block 46 is conical and is a plastic block;

In this embodiment, the conical fixing block 46 and the soft rod 45 can form densely distributed holes in the pit.

In a further preferred embodiment of the present invention, as shown in FIG3 , a water storage tank 47 is fixedly penetrated at the middle position in the circular tube 41, and the two ends of the water storage tank 47 respectively penetrate the two ends of the bracket 1 and are rotatably connected with the bracket 1 through bearings, the water storage tank 47 is composed of a tank body and two round rods, and the two circular tubes 41 are arranged at the two ends of the tank body and are cast integrally with the tank body, a one-way valve 48 is rotatably penetrated at the middle position in the water storage tank 47 through a bearing, and a sealing ring is sleeved on the outer peripheral side of the one-way valve 48 to block the gap between the one-way valve 48 and the water storage tank 47, a pressing valve 49 is fixedly penetrated at the position of the outer peripheral wall of the water storage tank 47 corresponding to the pressing plate 44, and the pressing end of the pressing valve 49 penetrates the pressing plate 44 and is fixedly connected to the plate wall of the pressing plate 44 and the tube wall of the circular tube 41, the pressing valve 49 is composed of a drain pipe and a pressing switch, and the pressing switch controls the drain outlet of the drain pipe to be opened or closed;

In this embodiment, the setting of the one-way valve 48 allows the water tank 47 to be connected to an external water tank, and the setting of the pressing valve 49 and the water tank 47 allows an appropriate amount of fertilizer water to be injected into the pit synchronously during the pit pressing process.

Embodiment 2: When laying the ground film, the operator rotates the threaded rod 23 to expand the distance between the two threaded rods 23, and then places the ground film roll in the bracket 1. When the ground film roll is aligned with the threaded rod 23, the threaded rod 23 is rotated in the opposite direction so that part of the threaded rod 23 is inserted into the roll, thereby placing the ground film roll in the bracket 1, and the installation of the ground film roll is completed;

The bracket 1 is connected to the agricultural machine by mounting, and as the agricultural machine moves and the roller 21 rolls, the ground film is laid along a straight track at a suitable position of the saline-alkali land;

It should be noted that when the device is placed on saline-alkali land, due to the gravity of the bracket 1 and the roller 21, the outer part of the roller 21 is inserted into the soil, and due to the mutual interference between the roller 21 and the soil, the roller 21 moves along a straight linear track;

It should be noted that when placing the ground film, the operator needs to cover the end of the ground film with soil and press and position the end of the ground film;

Embodiment 3: According to the embodiment 1, during the process of laying the ground film, the motor 34 is started to drive the rotary cutter 33 to rotate, and the saline-alkali land at the positions on both sides of the ground film is dug. Due to the blocking and guidance of the baffle 32, the dug soil is thrown to the top sides of both sides of the ground film, thereby compacting both sides of the ground film;

Embodiment 4: According to Embodiment 1 and Embodiment 2, when laying the ground film, the end of the ground film is passed under the circular tube 41. Due to the pressing of the circular tube 41, the operator does not need to place soil on the end of the ground film to press and fix the end of the ground film;

When the soil is thrown onto the ground film, due to the pressure of the circular tube 41 and the pressure ring 42 on the ground film, the two outer sides of the ground film will not be lifted up due to the airflow generated by the splashing soil, so that most of the splashed soil can be easily covered on the two sides of the ground film;

It should be noted that when the pressing ring 42 presses the ground film, linear pressing pits are formed on the two sides of the ground film, so that part of the soil falls directly into the linear pits. The soil in the linear pits conflicts with the ground film and the soil in the saline-alkali land, which can greatly enhance the pressing effect on the two sides of the ground film. The soil in the linear pits is less affected by the external airflow and will not be blown off the ground film due to the movement of the external airflow.

When the soil is thrown onto the ground film, part of the soil will be thrown into the circular tube 41, most of which will slide along the expanded inner wall of the circular tube 41 to the two sides of the ground film, while the other part of the soil will slide along the arc wall of the circular tube 41 to the middle position of the circular tube 41 and gather. When the circular hole 43 moves to fit the ground film, most of the soil in the circular tube 41 will flow into the circular tube 41 through the circular hole 43, and soil piles will be set at equal distances in the middle of the ground film to suppress the ground film.

During the rolling process of the circular tube 41, when the pressing plate 44 contacts the ground film, shallow pits are formed at equal intervals in the middle of the ground film due to the pressing of the circular tube 41, the water storage tank 47 and the pressing plate 44 on the ground film and the land. At the same time, due to the pressing of the pressing plate 44 on the soft rod 45, the conical end of the fixing block 46 pierces the ground film, forming dense holes on the bottom side of the shallow pit.

It should be noted that, as the circular tube 41 rotates, when the fixing block 46 is pulled out from the ground film, the soft ring bends and deforms, greatly reducing the friction between the fixing block 46 and the ground film, so that the fixing block 46 can be easily pulled out from the ground film;

In the process of pressing the shallow pit by the pressing plate 44, the compacted soil cooperates with the pressing plate 44 to press the pressing valve 49. In the process of pressing the shallow pit by the pressing plate 44, the pressing switch is pressed synchronously, so that part of the fertilizer water in the water storage tank 47 flows into the shallow pit from the pressing valve 49 for storage, and then slowly passes through the hole and infiltrates into the middle position of the raised soil. When adding fertilizer water to the saline-alkali land in the later stage, a proper amount of fertilizer water can be directly poured into the shallow pit, and the fertilizer water diffuses from the middle position of the raised soil into the raised soil, so that the fertility in the fertilizer water is retained in the raised soil as much as possible;

When planting plants, holes of appropriate size can be easily torn on the ground film for planting Chinese medicinal plants, without the need to specially open planting holes on the ground film.

It should be noted that by connecting one end of the water pipe to the external water tank and the other end of the water pipe to the one-way valve 48, the fertilizer water in the external fertilizer water tank can be continuously introduced into the water storage tank 47, thereby maintaining the fertilizer water content in the water storage tank 47.

The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. The ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil comprises a bracket (1) which is U-shaped;

characterized by further comprising:

the laying mechanism (2), the laying mechanism (2) is arranged at one end in the bracket (1), the laying mechanism (2) lays the mulch film, one end in the bracket (1) is provided with the film pressing mechanism (4), and the film pressing mechanism (4) presses the mulch film;

the ditching mechanism (3), the ditching mechanism (3) is located the both sides of pressing membrane mechanism (4), and ditching mechanism (3) carry out the ditching operation on saline and alkaline land.

2. The ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil according to claim 1, wherein: the laying mechanism (2) comprises two rollers (21), the peripheral wall of each roller (21) is inclined from the middle to the two sides, one end in each bracket (1) is provided with two threaded pipes (22) through relative rotation of a bearing, the rollers (21) are fixedly sleeved on the peripheral sides of the corresponding threaded pipes (22), the two rollers (21) are located in the brackets (1), threaded rods (23) are arranged in the threaded pipes (22) in a penetrating mode, and the outer annular edges of the two ends of each threaded rod (23) are in arc-shaped arrangement.

3. The ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil according to claim 2, wherein: the ditching mechanism (3) comprises two fixed plates (31), the two fixed plates (31) are fixedly arranged on the outer wall of the support (1) through bolts, one side of the bottom of the fixed plate (31) is fixedly provided with a baffle (32), the opening of the baffle (32) is in a flaring shape, the two baffles (32) are obliquely arranged, the two baffles (32) are oppositely arranged, the baffle (32) is internally provided with a rotary cutter (33) through bearing rotation, and the other side of the bottom of the fixed plate (31) is fixedly provided with a motor (34) for driving the rotary cutter (33) to rotate.

4. The ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil according to claim 3, wherein: the film pressing mechanism (4) comprises a circular tube (41), the circular tube (41) is arranged at the other end in the support (1), the outer peripheral sides of the two opening ends of the circular tube (41) are fixedly sleeved with pressing rings (42), and the outer peripheral wall of each pressing ring (42) is in a cambered surface shape.

5. The ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil according to claim 4, wherein: two openings of the circular tube (41) are arranged in a flaring shape, the inner wall of the circular tube (41) is arranged in a cambered surface shape, and a circular hole (43) is formed in the inner wall of the circular tube (41) at a position corresponding to the middle of the inner cambered wall of the circular tube (41).

6. The ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil according to claim 5, wherein: a pressing plate (44) is fixedly arranged on the peripheral wall of the round tube (41) at a position corresponding to the round hole (43) through an adhesive, and the outer wall of the pressing plate (44) is arranged in a cambered surface shape.

7. The ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil according to claim 6, wherein: a plurality of soft rods (45) are fixedly arranged on the outer cambered surface of the pressing plate (44), the distance between two adjacent soft rods (45) is equal, and honeycomb holes are formed in the soft rods (45).

8. The ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil according to claim 7, wherein: one end of the soft rod (45) far away from the pressing plate (44) is fixedly provided with a fixed block (46), and the fixed block (46) is in conical arrangement.

9. The ditching and film covering integrated machine for planting Chinese medicinal materials in saline-alkali soil according to claim 8, wherein: the water storage tank (47) is fixedly arranged at the middle position in the circular tube (41) in a penetrating manner, two ends of the water storage tank (47) penetrate through two ends of the support (1) respectively and are rotationally connected with the support (1) through bearings, the one-way valve (48) is rotatably arranged at the middle position in the water storage tank (47) in a penetrating manner through the bearings, the pressing valve (49) is fixedly arranged at the position, corresponding to the pressing plate (44), on the peripheral wall of the water storage tank (47), of the pressing end of the pressing valve (49), and the pressing end of the pressing valve (49) penetrates through the pressing plate (44) and is fixedly connected with the plate wall of the pressing plate (44) and the tube wall of the circular tube (41).