Inflation pipeline constant pressure controller

Abstract

The constant-pressure controller comprises a constant-pressure valve, the constant-pressure valve comprises a main pipeline, the upper end of the main pipeline is provided with a vertically-through water return channel, the upper end of the main pipeline is fixedly provided with an inflation chamber, the upper end of the inflation chamber is provided with an air inlet and an automatic anti-explosion valve or a pressure sensor, and one side of the inflation chamber is provided with an exhaust port; a sleeve is fixed in the lower end of the inflation chamber, a piston in vertical sliding fit with the inner wall of the sleeve is inserted into the sleeve, the piston is located above the water return channel, the piston can automatically adjust the position according to the water pressure in the main pipeline to control the water return amount, the water pressure in the main pipeline is equal to the air pressure in the air chamber, and the pressure in the main pipeline is constant. Adjustment of liquid pressure in the main pipe is achieved in an inflation pressure adjusting mode, the structure is simple, and operation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to a pipeline controller, in particular, an inflatable pipeline constant pressure controller. BACKGROUND

[0002] In the field of agricultural plant pest control, pesticide control has become the most widely used and indispensable control method due to its significant effect. Especially in the face of large-scale pest invasion, chemical pesticide control has shown great advantages, and its efficiency and pertinence have made it always dominate in the field of plant protection. In actual agricultural operation, when a large area of crops needs to be sprayed in batches, a spraying machine is widely used due to its efficient and convenient spraying effect. The pesticide spraying machine installs the spraying equipment and the pipeline controller system on the vehicle to realize accurate control of the spraying process. However, the pressure regulating valve of the existing pipeline controller is compressed by a spring to adjust the pressure. The structure is that the spring compression strength is different according to the water flow, the spring compression is more when the water flow is large, the pressure increases when the spring compression is more, and vice versa. The structure design has certain limitations and cannot maintain constant pressure. In actual application, the water pump of the spraying machine is usually connected through the transmission shaft of the tractor, and the unstable speed leads to large pressure fluctuation in the pipeline. More even, the pipeline bursts due to instantaneous pressure increase. The pipeline controller is usually composed of a water outlet shunt valve, a flow meter, a pressure regulating valve and a total valve. If there is no pressure regulating valve, the water flow when one water outlet shunt valve is opened is different from that when multiple water outlet shunt valves are opened. Therefore, the pressure regulating valve is needed. However, the structure of the pressure regulating valve is complex, and this design defect makes the pressure adjustment extremely inconvenient in actual operation, increasing the difficulty of the operator. SUMMARY

[0003] In view of the defects of the prior art, the purpose of the present application is to provide an inflatable pipeline constant pressure controller.

[0004] The technical solution of the present application is: an inflatable pipeline constant pressure controller, comprising a constant pressure valve, characterized in that: the constant pressure valve comprises a main pipeline, the upper end of the main pipeline has a backwater channel penetrating up and down, the upper end of the main pipeline is fixed with an inflation chamber, the upper end of the inflation chamber is provided with an air inlet, the lower end of the inflation chamber is fixedly provided with a sleeve, the sleeve is inserted with a piston which is in sliding cooperation with the inner wall of the sleeve up and down, the piston is located above the backwater channel, the front end of the main pipeline is fixed with a backwater pipe, the upper end of the main pipeline is provided with a flow guide cavity, the backwater channel is located at the lower end position of the flow guide cavity, and the flow guide cavity is used for connecting the backwater channel. The upper end of the backwater pipe is in communication with the flow guide cavity.

[0005] Further, the piston can automatically adjust its position according to the pressure of the main pipeline.

[0006] Further, the lower end of the piston has a plug, and the bottom of the plug is used to reduce the size of the upper opening of the backwater channel when the plug moves downward.

[0007] Further, the front end of the main pipeline has a through hole, which is in communication with the upper end of the backwater pipe and the flow guide cavity.

[0008] Further, one side of the air chamber is provided with an exhaust port.

[0009] Further, an automatic explosion-proof valve or a pressure sensor is installed at the upper end of the air chamber.

[0010] The air-filled pipeline constant pressure controller has the beneficial effects that: the air chamber, the piston and the backwater channel are cooperated to realize the regulation of the liquid pressure in the main pipeline, the operator only needs to control the air pressure input of the air inlet to control the force for driving the piston to move downward, thereby adjusting the pressure required for opening the backwater channel, and the structure is simple and the operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the application;

[0012] Figure 2 It is a schematic diagram of the top view of the first embodiment of the application;

[0013] Figure 3 It is a schematic diagram of the cross section in the direction of A-A; Figure 2

[0014] Figure 4 It is a schematic diagram of the cross section in the direction of B-B after rotating 90 degrees clockwise (omitting the filter); Figure 2

[0015] It is a schematic diagram of the structure of the main pipeline of the first embodiment of the application; Figure 5

[0016] It is a schematic diagram of the overall structure of the second embodiment of the application. Figure 6 In the figure: 1 - water outlet shunt valve, 11 - water outlet, 2 - flow meter, 3 - constant pressure valve, 31 - main pipeline, 311 - backwater channel, 312 - flow guide cavity, 313 - through hole, 32 - air chamber, 33 - automatic explosion-proof valve, 34 - air inlet, 35 - sleeve, 36 - piston, 361 - plug, 37 - backwater pipe, 371 - second backwater outlet, 38 - exhaust port, 4 - total valve, 41 - water inlet, 42 - first backwater outlet, 5 - pressure detector, 6 - filter, 7 - pressure sensor.

[0017] DETAILED DESCRIPTION

[0018] ​​In order to compare the technical solutions of the present application more intuitively and completely, the following non-limiting characteristic descriptions are made in conjunction with the drawings of the present application.

[0019] As shown in Figure 1 — Figure 5 The air-filled pipeline constant pressure controller comprises, from left to right, a plurality of water outlet shunt valves 1, a flow meter 2, a filter 6, a constant pressure valve 3 and a total valve 4. The left end of the water outlet shunt valve 1 is connected with a pressure detection 5. The constant pressure valve 3 comprises a main pipeline 31, the upper end of which has a backwater channel 311 that penetrates up and down. The upper end of the main pipeline 31 is fixed with an air chamber 32. The air chamber 32 is installed with an automatic explosion-proof valve 33 and an air inlet 34 at the upper end. The lower end of the air chamber 32 is fixedly provided with a sleeve 35. The sleeve 35 is inserted with a piston 36 that is in sliding fit with the inner wall of the sleeve 35 up and down. The piston 36 is located above the backwater channel 311. The front end of the main pipeline 31 is fixed with a backwater pipe 37. The upper end of the main pipeline 31 has a flow guide cavity 312. The backwater channel 311 is located at the lower end position of the flow guide cavity 312. The flow guide cavity 312 is used for connecting the backwater channel 311. The upper end of the backwater pipe 37 is in communication with the flow guide cavity 312. The air inlet 34 is connected with an air source through an air pipe, so that the air chamber 32 can be inflated. One side of the air chamber 32 is provided with an air outlet 38.

[0020] The piston 36 can automatically adjust its position according to the pressure of the main pipeline.

[0021] As shown in Figure 3 The lower end of the piston 36 has a plug 361. When the plug 361 moves downward, the bottom of the plug 361 is used to reduce the size of the opening at the upper end of the backwater channel 311.

[0022] As shown in Figure 5 The front end of the main pipeline 31 has a through hole 313 that is in communication with the upper end of the backwater pipe 37 and the flow guide cavity 312.

[0023] During use, the pressure of the main pipeline 31 can be adjusted. The controller will automatically adjust the pressure in the air chamber 32 to control the backwater amount, so as to keep the pressure of the main pipeline 31 constant.

[0024] When the water pressure of the main pipeline 31 is greater than the pressure in the air chamber 32, the piston 36 can be pushed upward. The pressure difference between the water pressure in the main pipeline 31 and the pressure in the air chamber 32 determines the distance that the piston 36 is pushed upward. The smaller the pressure in the air chamber 32, the higher the piston 36 is pushed, and the larger the opening at the upper end of the backwater channel 311 is opened, so that the backwater amount is larger. Figure 5As shown, the number of water outlet shunt valves 1 is five, if there is no constant pressure valve 3, the flow when opening five water outlet shunt valves 1 and opening one water outlet shunt valve 1 is not the same, the flow when opening one is much larger than opening five, at this time the controller will automatically reduce the pressure in the plenum chamber 32, the opening at the upper end of the backwater channel 311 is increased, a part of water will overflow through the backwater pipe 37, so that the water pressure of the water entering the water outlet shunt valve 1 is small, the flow when opening one water outlet shunt valve 1 can be reduced.

[0025] As shown in Figure 3 When the piston 36 moves upward, the sleeve 35 blocks the plug 361 at the bottom, preventing the piston 36 from moving upward and falling off.

[0026] As shown in Figure 1 The lower end of the total valve 4 has a water inlet 41, and the right end has a first backwater outlet 42; the lower end of the backwater pipe 37 has a second backwater outlet 371. The total valve 4 is an electric ball valve, as shown in Figure 2 At this time, the right end of the main pipe 31 is blocked, the water entering from the water inlet 41 can only flow out from the first backwater outlet 42, after the right end of the main pipe 31 is opened, the water entering from the water inlet 41 can flow to the main pipe 31, and the total valve 4 plays a role as a total switch. The water outlet shunt valve 1 is an electric valve, and the lower end is a water outlet 11.

[0027] The air-filled pipeline constant pressure controller provided by the application utilizes the synergistic effect of the plenum chamber 32, the piston 36 and the backwater channel 311 to realize the regulation of the liquid pressure in the main pipe 31, the operator only needs to control the air pressure input of the air inlet 34 to control the force driving the piston 36 to move downward, thereby regulating the pressure required to open the backwater channel 311, playing a role in regulating the liquid pressure in the main pipe 31, and the structure is simple and the operation is convenient.

[0028] As shown in Figure 6 The difference between example two and example one is that the upper end of the plenum chamber 32 is provided with a pressure sensor 7 and an air inlet 34.

[0029] Of course, the above is only a preferred embodiment of the application, and is not limited to the patent scope of the application, any simple modification and equivalent structural change according to the content of the application specification and drawings should also be included in the patent protection scope of the application.

Claims

1. A constant pressure controller for an air line comprising a constant pressure valve, characterised in that: The constant pressure valve comprises a main pipe, an upper and lower through water return channel at the upper end of the main pipe, an air chamber fixed at the upper end of the main pipe, an air inlet installed at the upper end of the air chamber, a sleeve fixed at the lower end of the air chamber, a piston inserted into the sleeve and slidingly matched with the inner wall of the sleeve, the piston being located above the water return channel, a water return pipe fixed at the front end of the main pipe, and a flow guide cavity at the upper end of the main pipe, the water return channel being located at the lower end of the flow guide cavity and used for connecting the water return channel, the upper end of the water return pipe being communicated with the flow guide cavity.

2. The constant pressure controller for an air-filled pipeline of claim 1, wherein: The piston can automatically adjust its position according to the pressure of the main pipe.

3. The constant pressure controller for an air-filled pipeline of claim 1, wherein: The lower end of the piston has a plug, the bottom of the plug being used for reducing the size of the opening at the upper end of the water return channel when the plug moves downward.

4. The constant pressure controller for an air-filled pipeline of claim 1, wherein: The front end of the main pipe has a through hole communicated with the upper end of the water return pipe and the flow guide cavity.

5. The constant pressure controller for an air-filled pipeline of claim 1, wherein: An exhaust port is arranged at one side of the air chamber.

6. The constant pressure controller for an air-filled pipeline of claim 1, wherein: An automatic explosion-proof valve or a pressure sensor is further installed at the upper end of the air chamber.

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