CN210247524U

CN210247524U - Proportional flow fertilizer applicator

Info

Publication number: CN210247524U
Application number: CN201921023522.8U
Authority: CN
Inventors: 员小龙; 员宝会; 何秀英; 员小睿; 员小跃
Original assignee: Hainan Baoxiu Water Saving Technology Co Ltd
Current assignee: Hainan Baoxiu Water Saving Technology Co Ltd
Priority date: 2019-07-02
Filing date: 2019-07-02
Publication date: 2020-04-07
Anticipated expiration: 2029-07-02

Abstract

The utility model relates to a proportion formula flow fertilizer applicator, include: the device comprises a shell, a pumping mechanism, a pumping rod and a through pipe; an inner shell plate arranged around the through hole is arranged in the shell, the inner shell plate separates the cavity into an inner cavity and an outer cavity, the pumping mechanism is movably arranged in the cavity and comprises a piston, a connecting rod assembly, a trigger rod, a first sealing element and a second sealing element, a first drain hole and a second drain hole are formed in the piston, the first drain hole is communicated with the outer cavity, the second drain hole is communicated with the inner cavity, the connecting rod assembly is movably arranged on the piston, the trigger rod is connected with the connecting rod assembly, the connecting rod assembly is connected with the first sealing element and the second sealing element, and the trigger rod is movably abutted to one end, provided with the through hole, of the shell and; the through pipe is communicated with the through opening, the pumping rod is connected with the piston, and the pumping rod is movably arranged in the through pipe. The reciprocating motion of the piston is driven by water pressure, the liquid fertilizer is pumped into water, and the liquid fertilizer and the water are mixed and sprayed, so that the spraying efficiency of the fertilizer is effectively improved.

Description

Proportional flow fertilizer applicator

Technical Field

The utility model relates to the technical field of fertilization, in particular to a proportional flow fertilizer applicator.

Background

Fertilization refers to an agricultural technical measure of applying a fertilizer into soil or spraying the fertilizer on plants, providing nutrients required by the plants, and maintaining and improving the soil fertility.

Traditional fertilizing tool adopts the evacuation mode, with in the fertilizer liquid suction pipeline to extrude the fertilizer liquid through pressure, make the fertilizer liquid spray on crops. This kind of vacuumized spraying mode needs manual to add water in the fertilizer liquid, leads to using inconveniently to the inefficiency can not realize large-traffic irrigation, leads to the fertilization efficiency lower.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a proportional flow fertilizer applicator.

A proportional flow fertilizer applicator comprising: the device comprises a shell, a pumping mechanism, a pumping rod and a through pipe;

a cavity is formed in the shell, a through hole is formed in one end of the shell, a liquid inlet and a liquid outlet are formed in the side face of the shell, an inner shell plate arranged around the through hole is arranged in the shell, the length of the inner shell plate is smaller than that of the shell, the cavity is divided into an inner cavity and an outer cavity by the inner shell plate, the inner cavity is communicated with the through hole, a communication hole is formed in the inner shell plate, the liquid inlet is communicated with the communication hole through an inner tube, and the liquid outlet is communicated with the outer cavity;

the pumping mechanism is movably arranged in the cavity and comprises a piston, a connecting rod assembly, a trigger rod, a first sealing element and a second sealing element, one end of the piston is abutted against the side wall of the cavity, the other end of the piston is abutted against the inner side surface of the shell, the piston is provided with at least one first drain hole and at least one second drain hole, the first drain hole is communicated with the outer cavity, the second drain hole is communicated with the inner cavity, the connecting rod assembly is movably arranged on the piston, the trigger rod is connected with the connecting rod assembly, the connecting rod assembly is connected with the first sealing element and the second sealing element, the piston is provided with a movable hole, the trigger rod is movably arranged in the movable hole in a penetrating way, and the trigger rod is movably abutted against one end of the shell, which is provided with a through hole, and the other end of the shell, the trigger rod is used for driving the first sealing element to open the first drain hole through the connecting rod assembly when abutting against one end of the shell, which is provided with the through hole, and driving the second sealing element to seal the second drain hole through the connecting rod assembly, and the trigger rod is also used for driving the first sealing element to close the first drain hole through the connecting rod assembly when abutting against the other end of the shell, and driving the second sealing element to open the second drain hole through the connecting rod assembly;

the siphunculus with the opening intercommunication, take out the pole with the piston is connected, take out the pole activity set up in the siphunculus, just take out the pole and keep away from the one end of piston is provided with sealed film, sealed film butt in the inboard surface of siphunculus.

Further, link assembly includes support and elasticity curved bar, the support with piston fixed connection, the elasticity curved bar rotate set up in on the support, the one end of elasticity curved bar with the trigger lever rotates to be connected, the other end with first sealing member and second sealing member rotates to be connected, the draw-in groove has been seted up on the support, the elasticity curved bar is provided with the fixture block, the fixture block activity is inserted and is located in the draw-in groove.

Further, the first sealing element is provided with a first sealing ring, and the first sealing ring is movably abutted against the side wall of the first drainage hole.

Furthermore, the outer side periphery of the piston is provided with a sealing rubber ring sheet which is abutted against the side wall of the inner cavity.

Further, the first seal is connected to the piston by an elastic member.

Furthermore, a stop ring is formed on the periphery of the through opening of the shell in a protruding mode.

Furthermore, the trigger rod is movably abutted against the stop ring.

Furthermore, the end of the drawing rod, which is far away from the piston, is provided with a drawing head, the width of the drawing head is gradually reduced from the end close to the piston to the end far away from the piston, and the sealing rubber sheet is arranged at the end of the drawing head, which is close to the piston.

Furthermore, one end, far away from the piston, of the pulling rod is provided with a blocking piece, and the blocking piece is arranged on one side, close to the piston, of the sealing rubber sheet.

Further, the siphunculus includes fixed pipe, regulating pipe, position sleeve and location snap ring, the first end of fixed pipe with the casing is connected, just fixed pipe with the opening intercommunication, the second end of fixed pipe is provided with the regulation screw thread, the second end of fixed pipe through adjust the screw thread with the one end spiro union of regulating pipe, the regulating pipe is kept away from the one end of fixed pipe sets up the socket, position sleeve's one end is provided with the ring channel, the location snap ring passes the socket is inserted and is located in the ring channel, position sleeve keeps away from the one end of fixed pipe is provided with spacing section of thick bamboo, the pump rod is kept away from the one end activity butt of piston in spacing section of thick bamboo is kept away from the tip of the one end of fixed pipe.

The utility model has the advantages that: when water enters the inner cavity from the liquid inlet, at the moment, the first water discharging hole of the piston is in an open state, the second water discharging hole is in a closed state, the water amount in the inner cavity is increased, the pressure of the water pushes the piston to move towards the direction far away from the through hole, liquid in the cavity above the piston enters the outer cavity through the first water discharging hole, the liquid can be sprayed through the liquid outlet communicated with the outer cavity, the piston drives the trigger rod to move and drives the pull rod to move in the through pipe, the pull rod pumps the fertilizer liquid into the through pipe and enables the fertilizer liquid to enter the inner cavity through the through hole, when the trigger rod is abutted to one end, far away from the through hole, in the shell, the trigger rod drives the first sealing element and the second sealing element to move through the connecting rod assembly, the first sealing element seals the first water discharging hole, the second sealing element opens the second water discharging hole, the liquid in the inner cavity, the liquid pressure of the cavity of piston top is bigger and bigger, promote the piston towards opening direction motion, make the direction motion of pump rod towards the opening, when the trigger bar butt sets up the one end of opening in the casing, the trigger bar passes through link assembly and drives first sealing member and the motion of second sealing member, make first sealing member beat the first wash port of switching, the second sealing member seals the second wash port, the pressure of the water of inner chamber promotes the piston once more and keeps away from the direction motion of opening, with this back and forth movement that realizes utilizing water pressure drive piston, and realized with liquid fertilizer suction aquatic, mix liquid fertilizer and water and spray, the efficiency of spraying of fertilizer has effectively been improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic view of a connection structure of a proportional flow fertilizer applicator according to an embodiment;

FIG. 2 is a schematic cross-sectional view of a proportional flow fertilizer applicator according to an embodiment;

FIG. 3 is a schematic diagram of a pumping mechanism according to one embodiment;

fig. 4 is a schematic view of a connection structure of the end of the pull rod according to an embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 3, a proportional flow fertilizer applicator 10 according to a preferred embodiment of the present invention includes: a housing 100, a pumping mechanism 200, a pumping rod 300 and a through pipe 400.

A cavity 101 is formed in the casing 100, a port 102 is formed at one end of the casing 100, a liquid inlet 103 and a liquid outlet 104 are formed in the side surface of the casing 100, an inner shell plate 130 arranged around the port 102 is arranged in the casing 100, the length of the inner shell plate 130 is smaller than that of the casing 100, the cavity 101 is separated into an inner cavity 101a and an outer cavity 101b by the inner shell plate 130, the inner cavity 101a is communicated with the port 102, a communication hole 131 is formed in the inner shell plate 130, the liquid inlet 103 is communicated with the communication hole 131 through an inner tube 140, and the liquid outlet 104 is communicated with the outer cavity 101 b.

The pumping mechanism 200 is movably disposed in the cavity 101, the pumping mechanism 200 includes a piston 210, a connecting rod assembly 220, a trigger rod 230, a first sealing member 240 and a second sealing member 250, one end of the piston 210 abuts against a sidewall of the inner cavity 101a, the other end of the piston 210 abuts against an inner side surface of the housing 100, the piston 210 is provided with at least one first drain hole 201 and at least one second drain hole 202, the first drain hole 201 is communicated with the outer cavity 101b, the second drain hole 202 is communicated with the inner cavity 101a, the connecting rod assembly 220 is movably disposed on the piston 210, the trigger rod 230 is connected with the connecting rod assembly 220, the connecting rod assembly 220 is connected with the first sealing member 240 and the second sealing member 250, the piston 210 is provided with a movable hole 203, and the trigger rod 230 is movably disposed in the movable hole 203, the trigger rod 230 is movably abutted against one end of the housing 100 with the through hole 102 and the other end of the housing 100, the trigger rod 230 is used for driving the first sealing element 240 to open the first drain hole 201 through the connecting rod assembly 220 when abutted against the end of the housing 100 with the through hole 102, driving the second sealing element 250 to seal the second drain hole 202 through the connecting rod assembly 220, and the trigger rod 230 is also used for driving the first sealing element 240 to seal the first drain hole 201 through the connecting rod assembly 220 and driving the second sealing element 250 to open the second drain hole 202 through the connecting rod assembly 220 when abutted against the other end of the housing 100.

The siphunculus 400 with the opening 102 intercommunication, take out the pole 300 with the piston 210 is connected, take out the pole 300 activity set up in the siphunculus 400, just take out the pole 300 and keep away from the one end of piston 210 is provided with sealed film 310, sealed film 310 butt in the inboard surface of siphunculus 400.

Specifically, since the length of the inner shell 130 is smaller than the length of the housing 100, the inner shell 130 divides part of the cavity 101 into an inner cavity 101a and an outer cavity 101b, i.e., the inner shell 130 divides the part of the cavity 101 close to the port 102 into the inner cavity 101a and the outer cavity 101b, and the part of the cavity 101 far from the port 102 is not divided by the inner shell 130.

The piston 210 includes a piston body 212 and a piston head 211, the piston body 212 is connected to the piston head 211, the width of the piston head 211 is greater than the width of the piston body 212, the piston body 212 is movably disposed in the inner cavity 101a, the piston body 212 abuts against the side wall of the inner cavity 101a, that is, the piston body 212 abuts against the inner side surface of the inner shell 130, the piston head 211 is movably disposed at one end of the cavity 101 away from the through opening 102, and the piston head 211 abuts against the inner side surface of the housing 100. The piston body 212 and the piston head 211 divide the cavity 101 into a first cavity and a second cavity 101c, the first cavity is the cavity 101a from the piston body 212 to the part of the port 102, namely the piston body 212 is connected with the side wall and the bottom of the cavity 101a to form the first cavity, the second cavity 101c is the cavity 101 from the piston head 211 to the end of the cavity 101 far away from the port 102, or the piston body 212 and the piston head 211 divide the cavity 101 into the second cavity 101c above the piston head 211 and the first cavity below the piston body 212; the first chamber communicates with the second chamber 101c through the second drain hole 202, and the second chamber 101c communicates with the outer chamber 101b through the first drain hole 201. It is worth mentioning that the first cavity may be considered as the inner cavity 101a, or the size of the first cavity may be changed with the movement of the piston body 212 within the inner cavity 101a, and thus the first cavity may be considered as a part of the inner cavity 101 a.

In this embodiment, the housing 100 includes an upper housing 110 and a lower housing 120, the port 102, the liquid inlet 103 and the liquid outlet 104 are all opened and connected to the lower housing 120, the upper housing 110 and the lower housing 120 are connected by a screw thread, the upper housing 110 and the lower housing 120 are connected in a sealing manner, and the cavity 101 is formed inside. The piston head 211 is movably disposed inside the upper housing 110, and the inner shell 130 is disposed inside the lower housing 120.

Through pipe 400 is connected with casing 100, and through pipe 400 is connected in the outside of casing 100, for example, through pipe 400 and casing 100 threaded connection, through pipe 400 one end and the opening 102 intercommunication of casing 100, like this, the inside of through pipe 400 can be with inner chamber 101a intercommunication, the other end of through pipe 400 is arranged in inserting the fertile liquid, like this, when taking out pole 300 and moving in through pipe 400, take out pole 300 and drive sealed film 310 motion, the vacuum suction that the through pipe 400 produced is with fertile liquid suction in through pipe 400, and then make fertile liquid pass through opening 102 and get into in the inner chamber 101 a.

In this embodiment, the water inlet port communicates with the communication hole 131 through the inner pipe 140 so that the water inlet port communicates with the inner chamber 101a, so that when water can enter the inner chamber 101a from the water inlet port, the water outlet port 104 communicates with the outer chamber 101b so that water in the outer chamber 101b can be delivered to the outside. It is worth mentioning that the water inlet is in communication with an external vacuum pump, such that the external vacuum pump can deliver water to the water inlet and to the inner cavity 101 a. In addition, since the pumping rod 300 is provided with the sealing film 310, the vacuum generated by the sealing film 310 in motion can pump the fertilizer liquid into the through pipe 400 by the sealing abutment between the sealing film 310 and the sidewall of the through pipe 400.

Specifically, when water enters the inner cavity 101a from the liquid inlet 103, at this time, the first drain hole 201 of the piston 210 is in an open state, the second drain hole 202 is in a closed state, since water in the inner cavity 101a cannot enter the second cavity 101c through the second drain hole 202, so that the amount of water in the inner cavity 101a increases, the pressure of water in the inner cavity 101a will push the piston 210 to move in a direction away from the through opening 102, liquid in the second cavity 101c above the piston 210 enters the outer cavity 101b through the first drain hole 201, so that the liquid can be sprayed through the liquid outlet 104 communicating with the outer cavity 101b, at the same time, the piston 210 drives the trigger rod 230 to move, and drives the pull rod 300 to move in the through pipe 400, so that the pull rod 300 draws fertilizer liquid into the through pipe 400, and causes the fertilizer liquid to enter the inner cavity 101a through the through opening 102, when the trigger rod 230 abuts against one end of the housing, the trigger rod 230 drives the first sealing element 240 and the second sealing element 250 to move through the connecting rod assembly 220, so that the first sealing element 240 closes the first drain hole 201, the second sealing element 250 opens the second drain hole 202, the liquid mixed with the fertilizer liquid in the inner cavity 101a enters the second cavity 101c above the piston 210, and at this time, the water in the second cavity 101c cannot be discharged to the outer cavity 101b through the first drain hole 201, so that the water in the second cavity 101c continuously increases, as the liquid in the second cavity 101c increases, the liquid pressure in the second cavity 101c increases, the piston 210 is pushed to move towards the through opening 102, so that the pumping rod 300 moves towards the through opening 102, when the trigger rod 230 abuts against one end of the setting 102 of the housing 100, the trigger rod 230 drives the first sealing element 240 and the second sealing element 250 to move through the connecting rod assembly 220, so that the first sealing element 240 opens and closes the first drain hole 201, the second sealing element 250 seals the second drain hole 202, and the pressure of the water in the inner cavity 101a pushes the piston 210 to move towards the direction far away from the through hole 102 again, so that the piston 210 is driven to move back and forth by using the water pressure, liquid fertilizer is pumped into the water, the liquid fertilizer and the water are mixed and sprayed, and the fertilizer spraying efficiency is effectively improved.

In order to realize the driving of the connecting rod assembly 220 by the trigger rod 230 and the driving of the first sealing member 240 and the second sealing member 250, further, as shown in fig. 3, the connecting rod assembly 220 includes a bracket 221 and an elastic curved rod 222, for the convenience of understanding, the piston head 221 in fig. 3 is a sectional structure, and the piston body is omitted in fig. 3, the bracket 221 is fixedly connected with the piston 210, specifically, the bracket 221 is fixedly connected with the piston head 211, the elastic curved rod 222 has an S-shaped bent structure, the elastic curved rod 222 is rotatably disposed on the bracket 221, one end of the elastic curved rod 222 is rotatably connected with the trigger rod 230, the other end is rotatably connected with the first sealing member 240 and the second sealing member 250, a clamping groove 226 is formed on the bracket 221, the elastic curved rod 222 is provided with a clamping block 227, and the clamping block 227 is movably inserted in the clamping groove 226, and the width of fixture block 227 towards the one end of draw-in groove 226 is by keeping away from the one end of draw-in groove 226 is to being close to the one end of draw-in groove 226 reduces gradually, sets up the ladder surface in draw-in groove 226, and the maximum width of fixture block 227 is greater than the open-ended width of draw-in groove, and the minimum width of fixture block 227 is less than the open-ended width of draw-in groove, like this, when the fixture block inserts the draw-in groove, will butt in the ladder surface in the draw-in groove, and when the fixture block received reverse effect, the resistance of ladder surface was overcome to the.

Specifically, in the present embodiment, the interior of the piston body 212 is provided as a hollow structure, the frame 221 and the elastic curved rod 222 are provided inside the piston body 212, and the interior of the piston body 212 is communicated with the second water discharge hole 202. In this embodiment, the first drainage hole 201 and the second drainage hole 202 are both opened on the piston head 211, the second drainage hole 202 is opened on the middle portion of the piston head 211, the first drainage hole 201 is opened on the position of the piston head 211 close to the edge, that is, the first drainage hole 201 is opened on the outer side of the position where the piston head 211 is connected with the piston body 212, so that the second drainage hole 202 can be communicated with the inner cavity 101a, and the first drainage hole 201 is not communicated with the inner cavity 101a but communicated with the outer cavity 101 b. The bracket 221 is provided with a guide groove 221a, one end of the elastic curved bar 222, which is far away from the trigger bar 230, is slidably disposed in the guide groove 221a, and the guide groove 221a is an arc-shaped groove. Thus, when the trigger lever 230 acts on the elastic curved lever 222, the elastic curved lever 222 rotates, so that the end of the elastic curved lever 222 away from the trigger lever 230 slides along the guide groove 221a, and the elastic curved lever 222 drives the first sealing member 240 and the second sealing member 250 to move.

When the trigger rod 230 abuts against one end of the inner side surface of the housing 100, which is far away from the through hole 102, the trigger rod 230 bounces towards the through hole 102, the trigger rod 230 drives one end of the elastic curved rod 222, which is close to the trigger rod 230, to rotate towards the movement direction of the trigger rod 230, so that the other end of the elastic curved rod 222 rotates in the opposite direction, the elastic curved rod 222 drives the first sealing member 240 to move close to the first drain hole 201, and drives the second sealing member 250 to move away from the second drain hole 202, so that the first sealing member 240 seals the first drain hole 201, the second sealing member 250 opens the second drain hole 202, and meanwhile, the fixture block is inserted into the clamping groove, so that the positions of the trigger rod 230 and the; when the trigger rod 230 abuts against one end of the inner side surface of the housing 100 close to the through hole 102, the trigger rod 230 bounces towards the direction away from the through hole 102, so that the other end of the elastic curved rod 222 rotates in the opposite direction, the elastic curved rod 222 drives the first sealing member 240 to move away from the first drain hole 201, and drives the second sealing member 250 to move close to the second drain hole 202, so that the first sealing member 240 opens the first drain hole 201, and the second sealing member 250 seals the second drain hole 202, at this time, the fixture block is pulled out from the clamping groove, and the first sealing member 240 and the second sealing member 250 are driven through the above process.

In order to open and close the first and

second drain holes

201 and 202, further, a first sealing member 240 and a second sealing member 250 are movably disposed on both sides of the piston head 211, specifically, the first sealing member 240 is movably disposed on a side of the piston head 211 opposite to the through opening 102, and the second sealing member 250 is movably disposed on a side of the piston head 211 facing the through opening 102, so that, when the flexible curved rod 222 rotates, the first sealing member 240 and the second sealing member 250 are driven to move synchronously, the first sealing member 240 moves away from the piston head 211, and the second seal 250 is proximate the piston head 211, whereas the first seal 240 is proximate the piston head 211, and the second seal 250 is distal the piston head 211, so that the second drain hole 202 is closed when the first drain hole 201 is opened, and the second drain hole 202 is opened when the first drain hole 201 is closed, thereby achieving the opening and closing of the first drain hole 201 and the second drain hole 202.

In order to make the movement of the first sealing member 240 more stable, in one embodiment, the bracket 221 is provided with a first guide rod 225, the first sealing member 240 is provided with a first guide hole (not shown), the guide rod is arranged in the guide hole in a penetrating manner, and the first sealing member 240 is arranged outside the guide rod through the guide hole, so that the first sealing member 240 can move along the guide rod in a direction close to or far away from the first drain hole 201, and the movement of the first sealing member 240 is more stable.

In order to make the movement of the second sealing member 250 more stable, in one embodiment, a second guide rod is disposed on the bracket 221, the second sealing member 250 is provided with a second guide hole, the guide rod is inserted into the guide hole, and the second sealing member 250 is sleeved outside the guide rod through the guide hole, so that the second sealing member 250 can be close to or far away from the second drainage hole 202 along the guide rod, and the movement of the second sealing member 250 is more stable.

In order to make the sealing effect of the first sealing element 240 on the first drain hole 201 better, further, the first sealing element 240 is provided with a first sealing ring, and the first sealing ring is movably abutted against the side wall of the first drain hole 201. Through setting up first sealing washer for the leakproofness between the lateral wall of first sealing member 240 and first drain hole 201 is better, thereby makes first sealing member 240 better to the sealed effect of first drain hole 201.

In order to make the sealing effect of the second sealing element 250 on the second drain hole 202 better, further, the second sealing element 250 is provided with a second sealing ring, and the second sealing ring movably abuts against the sidewall of the second drain hole 202. By providing the second sealing ring, the sealing performance between the second sealing member 250 and the sidewall of the second drain hole 202 is better, and the sealing effect of the second sealing member 250 on the second drain hole 202 is better.

In order to improve the sealing performance between the piston 210 and the inner casing plate 130, as shown in fig. 2, a sealing rubber ring piece 213 is disposed on the outer periphery of the piston 210, and the sealing rubber ring piece 213 abuts against the sidewall of the inner cavity 101 a. Specifically, the sealing rubber ring piece 213 abuts against the inner side surface of the inner shell plate 130, in this embodiment, the sealing rubber ring piece 213 is disposed on the outer side periphery of the piston body 212, and through the sealing rubber ring piece 213, the sealing performance between the piston body 212 and the side wall of the inner cavity 101a is better, so that water in the inner cavity 101a does not enter the second cavity 101c through the piston body 212 when the second drainage hole 202 is closed, and the vacuum pumping effect of the piston body 212 on the inner cavity 101a is better, and further, the suction force on liquid is greater.

In order to enable a better return of the seal, further, please refer to fig. 3 again, the first seal 240 is connected with the piston 210 by an elastic member 241. In one embodiment, the elastic element 241 is a tension spring, and the piston 210 is connected to the first sealing element 240 through a spring, so that the sealing element can be reset under the driving of the connecting rod assembly 220, and can also be reset with the assistance of the spring, the power of the reset is improved, and the sealing effect of the sealing element on the drain hole is better.

In order to further improve the connection sealing performance between the through opening 102 and the through pipe 400, as shown in fig. 2, a stop ring 150 is formed on the periphery of the through opening 102 of the housing 100 in a protruding manner. The stop is arranged around the through opening 102, and the connection between the periphery of the through opening 102 and the through tube 400 can be further closed by the stop ring 150. Further, the trigger bar 230 is movably abutted against the stop ring 150. The abutment of the stop ring 150 against the trigger rod 230 allows the trigger rod 230 to be forced to rebound and provide a good driving action for the flexible curved bar 222.

In order to make the resistance of the pull rod 300 moving away from the through opening 102 smaller, as shown in fig. 4, the end of the pull rod 300 away from the plunger 210 is provided with a pull head 320, the width of the pull head 320 gradually decreases from the end close to the plunger 210 to the end away from the plunger 210, and the sealing rubber sheet 310 is arranged at the end of the pull head close to the plunger 210. In this embodiment, the pulling head is tapered, and the width of the end of the pulling head 320 is smaller, so that the pulling rod 300 is less resistant to movement in the direction away from the through hole 102, which is beneficial to the movement of the pulling rod 300 in the through pipe 400, and the sealing rubber sheet 310 can better overcome the resistance to movement by the pulling of the pulling head 320.

In order to avoid excessive deformation of the sealing film 310 during the movement, further, referring to fig. 4 again, a blocking plate 330 is disposed at an end of the pulling rod 300 away from the piston 210, and the blocking plate 330 is disposed at a side of the sealing film 310 close to the piston 210. In this embodiment, the sealing film 310 is disposed between the baffle 330 and the pulling head 320, and the pulling head 320 is disposed at the end of the pumping rod 300 away from the piston 210, so that the excessive deformation of the sealing film 310 during the movement process can be avoided by the limitation of the baffle 330 and the pulling head 320, and the sealing film 310 can have a better vacuum pumping effect.

In order to realize the control to the suction volume of fertile liquid, in an embodiment, the siphunculus includes fixed pipe, control tube, position sleeve and location snap ring, the first end of fixed pipe with the casing is connected, just fixed pipe with the opening intercommunication, the second end of fixed pipe is provided with the regulation screw thread, the second end of fixed pipe through adjust the screw thread with the one end spiro union of control tube, the control tube is kept away from the one end of fixed pipe sets up the socket, position sleeve's one end is provided with the ring channel, the location snap ring passes the socket is inserted and is located the ring channel, position sleeve keeps away from the one end of fixed pipe is provided with spacing section of thick bamboo, the pump rod is kept away from the one end activity butt of piston in spacing section of thick bamboo is kept away from the tip of the one end of fixed pipe.

Specifically, the drawing rod is movably arranged in the fixed pipe and the positioning sleeve, and the inner diameter of the limiting cylinder is smaller than the width of one end, away from the piston, of the drawing rod, so that one end, away from the piston, of the drawing rod can be stopped by the limiting cylinder when moving towards the shell, and the movement distance of the drawing rod is further limited. The one end that the control tube is close to fixed pipe sets up the internal thread, the internal thread sets up the internal thread with adjust the screw thread spiro union, thus, through adjusting the spiro union degree of depth between internal thread and the regulation screw thread, realize the adjustment to the position between control tube and the fixed pipe, can realize the control to the total length of siphunculus, because total length between control tube and the fixed pipe is adjustable, and then make the pole butt also adjustable in the position of spacing section of thick bamboo, it is big more to take out the pole motion stroke, the negative pressure that causes just is big more, inspiratory fertile liquid is more, it is little to take out the pole motion stroke, the negative pressure of formation is little, inspiratory fertile liquid is less. Like this, through the degree of depth of the spiro union of adjustment fixed pipe and control tube, can realize the control to the suction volume of taking out the pole to the fertilizer liquid.

In order to enable the pulling rod to abut against the limiting cylinder, in one embodiment, a stopping part is arranged at one end of the pulling rod, which is far away from the piston, and the width of the stopping part is greater than the inner diameter of the limiting cylinder, so that the pulling rod is limited by the limiting cylinder to stop moving by the stopping part abutting against the end part of the limiting cylinder.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A proportional flow fertilizer applicator, comprising: the device comprises a shell, a pumping mechanism, a pumping rod and a through pipe;

2. The proportional flow fertilizer applicator of claim 1, wherein the connecting rod assembly comprises a bracket and an elastic curved rod, the bracket is fixedly connected with the piston, the elastic curved rod is rotatably disposed on the bracket, one end of the elastic curved rod is rotatably connected with the trigger rod, the other end of the elastic curved rod is rotatably connected with the first sealing element and the second sealing element, a clamping groove is formed on the bracket, the elastic curved rod is provided with a clamping block, and the clamping block is movably inserted in the clamping groove.

3. The proportional flow fertilizer applicator of claim 2, wherein the first sealing element is provided with a first sealing ring movably abutting against a sidewall of the first drain hole.

4. The proportional flow fertilizer applicator of claim 1, wherein the outer periphery of the piston is provided with a sealing rubber ring piece which abuts against the side wall of the inner cavity.

5. The proportional flow fertilizer applicator of claim 1, wherein the first seal is connected to the piston by a resilient member.

6. The proportional flow fertilizer applicator of claim 1, wherein the housing is formed with a stop ring protruding from the perimeter of the through opening.

7. The proportional flow fertilizer applicator of claim 6, wherein the trigger bar is movably abutted against the stop ring.

8. The proportional flow fertilizer applicator of claim 1, wherein a pulling head is disposed at an end of the pulling rod away from the piston, the width of the pulling head gradually decreases from an end close to the piston to an end away from the piston, and the sealant sheet is disposed at an end of the pulling head close to the piston.

9. The proportional flow fertilizer applicator of claim 8, wherein an end of the pumping rod remote from the piston is provided with a catch, and the catch is provided on a side of the sealant sheet adjacent to the piston.

10. The proportional flow fertilizer applicator as defined in claim 1, wherein the through pipe comprises a fixed pipe, an adjusting pipe, a positioning sleeve and a positioning snap ring, a first end of the fixed pipe is connected with the housing, the fixed pipe is communicated with the through opening, a second end of the fixed pipe is provided with an adjusting thread, the second end of the fixed pipe is in threaded connection with one end of the adjusting pipe through the adjusting thread, one end of the adjusting pipe, which is far away from the fixed pipe, is provided with a socket, one end of the positioning sleeve is provided with an annular groove, the positioning snap ring penetrates through the socket and is inserted into the annular groove, one end of the positioning sleeve, which is far away from the fixed pipe, is provided with a limiting cylinder, and one end of the pumping rod, which is far away from the piston, is movably abutted against the end of the limiting cylinder, which is.