Self-suction device of engine

Abstract

The utility model belongs to the technical field of water pumping devices, and particularly relates to a self-suction device of an engine, which comprises the engine, a water pump and a Venturi tube, the engine is provided with an exhaust pipe, the water pump is arranged on the side surface of the engine, is driven by the output end of the engine and comprises a water inlet end and a water outlet end, and the water inlet end of the water pump is connected with a water pumping pipe. The Venturi tube comprises an air inlet end, an air outlet end and an air extraction end, the air inlet end is connected to the side face of the exhaust tube, and the air extraction end is connected with the water inlet end through an air tube and used for extracting air in the water extraction tube; the venturi tube is arranged on the side face of the exhaust pipe of the engine, exhaust gas generated by starting of the engine enters the venturi tube, negative pressure is formed at the air suction end, air suction in the water suction pipe is accelerated, then water can be pumped to the water pump under the condition that the power and lift of the water pump are small, the requirements for the power and lift of the water pump are greatly reduced, and the service life of the water pump is prolonged. And compared with increasing of the power and lift of the water pump, the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water pumping device technical field, especially, a self-suction device of engine. BACKGROUND

[0002] The water pumping device is usually driven by the engine or the motor to pump the water, and the water is pumped horizontally or from the low place to the high place.

[0003] When the water pumping device is driven by the engine to pump the water, if the water inlet pipe connected to the water inlet end of the water pump is long, that is, the water is taken from a far place, and the power and the lift of the water pump are small, the water pumping speed is slow, and even when the water is pumped from the low place to the high place, the water cannot be pumped. UTILITY MODEL CONTENTS

[0004] The utility model discloses a self-suction device of engine, which can pump water when the power and the lift of the water pump are small.

[0005] Therefore, the utility model provides a self-suction device of engine, which comprises:

[0006] The engine comprises an exhaust pipe.

[0007] The water pump is installed on the side surface of the engine and is driven by the output end of the engine, and comprises a water inlet end and a water outlet end.

[0008] The water pumping pipe is connected to the water inlet end of the water pump.

[0009] The Venturi tube comprises an air inlet end, an air outlet end and an air suction end, the air inlet end is connected to the side surface of the exhaust pipe, the air suction end is connected to the water inlet end through the air pipe, and the air suction end is used for sucking the air in the water pumping pipe.

[0010] In the above technical scheme, further, the Venturi tube further comprises:

[0011] The air inlet nozzle is installed on the air inlet end and is internally provided with a contraction flow channel section and a throat.

[0012] The air outlet end is provided with a diffusion flow channel section, the air suction end is provided with an air inlet hole, and the throat is located between the contraction flow channel section and the diffusion flow channel section, and an air inlet flow channel in communication with the air inlet hole is formed between the throat and the diffusion flow channel section.

[0013] In the above technical scheme, further:

[0014] The air inlet end is provided with a threaded hole.

[0015] In the above technical scheme, further, the utility model further comprises:

[0016] The first joint is arranged on the side of the exhaust pipe and is threadedly connected with the threaded hole.

[0017] The first joint defines the air inlet nozzle in the threaded hole.

[0018] In the above technical solution, further comprising:

[0019] The first valve is arranged on the end of the exhaust pipe away from the engine.

[0020] In the above technical solution, further comprising:

[0021] The second valve is arranged on the side of the water inlet end.

[0022] In the above technical solution, further comprising:

[0023] The second joint is arranged on the side of the water inlet end and is used for mounting the second valve.

[0024] In the above technical solution, further comprising:

[0025] The pressure gauge is arranged on the water inlet end and is connected with the second valve and the air pipe by a tee joint.

[0026] The beneficial effects of the utility model are as follows:

[0027] 1. By arranging a Venturi tube on the side of the exhaust pipe of the engine, the exhaust gas generated by the start of the engine enters the Venturi tube and forms negative pressure at the suction end, so that the air in the water suction pipe is quickly sucked out, and thus the water can be sucked into the water pump even if the power and lift of the water pump are small, which greatly reduces the demand for the power and lift of the water pump and has the effect of reducing cost compared with increasing the power and lift of the water pump.

[0028] 2. By arranging the convergent flow channel section and the throat of the Venturi tube in the form of an air inlet nozzle, the processing is effectively simplified and the manufacturing cost is further reduced, and by arranging the threaded hole at the air inlet end and the first joint, the air inlet nozzle is not only effectively limited and the installation stability is improved, but also the threaded connection can facilitate the installation and disassembly of the Venturi tube and improve the convenience.

[0029] 3. By arranging the first valve, the exhaust pipe of the engine can be closed at the initial stage of engine start, so as to increase the air flow into the Venturi tube and thus improve the speed of air extraction in the water suction pipe and improve the water suction efficiency.

[0030] 4. By arranging the second valve, the water in the water inlet end can be prevented from entering the Venturi tube through the air pipe after the water pump stably sucks water, so as to improve the stability of water pumping of the water pump. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic view of the present application;

[0032] Figure 2 is a structural schematic view of the Venturi tube of the present application;

[0033] Figure 3 is a side view of the Venturi tube of the present application;

[0034] Figure 4 is a sectional view of the present application at A-A; Figure 3

[0035] indicated in the figure are: 1, engine; 2, exhaust pipe; 3, water pump; 30, water inlet end; 31, water outlet end; 4, water suction pipe; 5, Venturi tube; 50, air inlet end; 51, air outlet end; 52, air suction end; 53, air inlet nozzle; 54, converging flow passage section; 55, throat; 56, diverging flow passage section; 57, air inlet hole; 58, air inlet flow passage; 59, screw hole; 6, air pipe; 7, first joint; 8, first valve; 9, second valve; 10, second joint; 11, pressure gauge. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0037] Embodiment 1

[0038] The embodiment provides a self-suction device of an engine, which comprises:

[0039] The engine 1 comprises an exhaust pipe 2.

[0040] The water pump 3 is installed on the side of the engine 1 and is driven by the output end of the engine 1, and comprises a water inlet end 30 and a water outlet end 31.

[0041] The water suction pipe 4 is connected to the water inlet end 30 of the water pump 3.

[0042] The Venturi tube 5 comprises an air inlet end 50, an air outlet end 51 and an air suction end 52, the air inlet end 50 is connected to the side of the exhaust pipe 2, the air suction end 52 is connected to the water inlet end 30 through the air pipe 6, and is used for sucking air in the water suction pipe 4.

[0043] ​Wherein, the engine 1 is a mature technology, specifically, can adopt diesel engine 1 or gasoline engine 1, its specific structure is for the person skilled in the art from the traditional engine 1, this place no longer repeats;

[0044] At the same time, the water pump 3 can be an impeller pump, and a bracket for mounting the engine 1 is also provided, and a storage battery for starting the engine 1 is mounted on the bracket, which are all mature technologies and are provided for the traditional engine 1, and will not be repeated here.

[0045] And the bracket bottom is also provided with a roller and a supporting leg, and a handle is provided on the side close to the supporting leg.

[0046] As can be seen from the embodiment, by providing a Venturi tube 5 on the side of the exhaust pipe 2 of the engine 1, the exhaust gas generated by the starting of the engine 1 enters the Venturi tube 5 and forms a negative pressure at the suction end 52, which accelerates the extraction of air in the water suction pipe 4. The self-suction effect generated by the exhaust pipe 2 of the engine 1 can also extract water to the water pump 3 under the condition that the power and lift of the water pump 3 are small, greatly reducing the demand for the power and lift of the water pump 3, and compared with increasing the power and lift of the water pump 3, it has the effect of reducing the cost.

[0047] The setting of the bracket facilitates the installation of the engine 1 and the water pump 3, improves the stability, and the setting of the roller and the handle facilitates the movement of the device and improves the convenience.

[0048] Embodiment 2:

[0049] The embodiment provides a self-suction device of an engine, which has the following technical features in addition to the technical solutions of the above embodiments.

[0050] The air inlet nozzle 53 is installed on the air inlet end 50, and the inside is provided with a converging flow channel section 54 and a throat 55;

[0051] Wherein, the air outlet end 51 is provided with a diffusion flow channel section 56, the suction end 52 is provided with an air inlet hole 57, and the throat 55 is located between the converging flow channel section 54 and the diffusion flow channel section 56, and a gas inlet flow channel 58 is formed between the throat 55 and the diffusion flow channel section 56 and communicates with the air inlet hole 57.

[0052] As can be seen from the embodiment, by setting the converging flow channel section 54 and the throat 55 in the Venturi tube 5 in the form of the air inlet nozzle 53, the processing is effectively simplified, the processing convenience is improved, and the manufacturing cost is further reduced.

[0053] Embodiment 3:

[0054] The embodiment provides a self-suction device of an engine, which has the following technical features in addition to the technical solutions of the above embodiments.

[0055] The air inlet end 50 is provided with a threaded hole 59.

[0056] It can be seen from the embodiment that the threaded hole 59 is provided in the air inlet end 50, the Venturi tube 5 is installed through threaded connection, and the convenience of installation and disassembly is improved.

[0057] Embodiment 4:

[0058] The self-suction device of the engine provided in the embodiment comprises the technical solutions of the above embodiments and the following technical features.

[0059] The first joint 7 is installed on the side of the exhaust pipe 2 and is in threaded connection with the threaded hole 59;

[0060] The first joint 7 limits the air inlet nozzle 53 in the threaded hole 59, and the first joint 7 and the exhaust pipe 2 can be welded.

[0061] It can be seen from the embodiment that the first joint 7 is arranged to facilitate the installation of the Venturi tube 5 on the side of the exhaust pipe 2 of the engine 1, the first joint 7 limits the air inlet nozzle 53 in the threaded hole 59, and the installation stability is improved, and the installation convenience of the air inlet nozzle 53 is improved.

[0062] Embodiment 5:

[0063] The self-suction device of the engine provided in the embodiment comprises the technical solutions of the above embodiments and the following technical features.

[0064] The first valve 8 is installed on the end of the exhaust pipe 2 away from the engine 1;

[0065] The first valve 8 can be a ball valve, and the specific structure is a mature existing technology, which will not be described here.

[0066] It can be seen from the embodiment that the first valve 8 is arranged to close the exhaust pipe 2 of the engine 1 at the initial stage of starting of the engine 1, so as to increase the airflow into the Venturi tube 5, thereby improving the speed of air extraction in the water suction pipe 4, and improving the water suction efficiency.

[0067] Embodiment 6:

[0068] The self-suction device of the engine provided in the embodiment comprises the technical solutions of the above embodiments and the following technical features.

[0069] The second valve 9 is installed on the side of the water inlet end 30;

[0070] The second valve 9 can be a ball valve, and its specific structure is a mature technology, which will not be described here.

[0071] The second valve 9 can be a ball valve, and its specific structure is a mature technology, which will not be described here.

[0072] Embodiment 7:

[0073] The self-suction device of the engine provided in the embodiment further comprises the following technical features in addition to the technical solutions of the above embodiments.

[0074] The second joint 10 is installed on the side of the water inlet end 30 and is used for installing the second valve 9.

[0075] The second joint 10 and the water inlet end 30 can be welded.

[0076] The second joint 10 is installed on the side of the water inlet end 30 and is used for installing the second valve 9.

[0077] Embodiment 8:

[0078] The self-suction device of the engine provided in the embodiment further comprises the following technical features in addition to the technical solutions of the above embodiments.

[0079] The pressure gauge 11 is installed on the water inlet end 30 and is connected with the second valve 9 and the air pipe 6 through a tee joint.

[0080] The specific structure of the pressure gauge 11 is a mature technology, which can be known by those skilled in the art from the conventional pressure gauge 11.

[0081] The pressure gauge 11 can be used to understand the progress of the air extraction of the water inlet end 30 by the Venturi tube 5 through the change of the value on the pressure gauge 11, and the convenience is improved.

[0082] The tee joint is used for connection, and the installation convenience of the pressure gauge 11, the air pipe 6 and the second valve 9 is improved.

[0083] The working principle of the present application is as follows: by connecting one end of the water pumping pipe 4 to the water inlet end 30 of the water pump 3 and placing the other end in water (such as river water), and connecting a water pipe to the water outlet end 31 of the water pump 3 for guiding water to the use site, first close the first valve 8, open the second valve 9, and start the engine 1, the exhaust pipe 2 of the engine 1 discharges gas into the Venturi tube 5, and negative pressure is generated at the air inlet flow channel 58 and the air inlet hole 57, thereby performing air extraction on the water inlet end 30 of the water pump 3, as the pressure in the water inlet end 30 of the water pump 3 decreases, water moves in the water pipe to the water inlet end 30 of the water pump 3 under the action of atmospheric pressure, and after the water outlet end 31 of the water pump 3 starts to discharge water, first open the first valve 8, and then close the second valve 9;

[0084] And the first valve 8 and the second valve 9 can also be remote control valves, i.e. solenoid valves, and further improve the convenience through remote control.

[0085] The above describes the embodiments of the present application in combination with the drawings, and the embodiments and features in the embodiments in the present application can be combined with each other without conflict, the present application is not limited to the above specific embodiments, the above specific embodiments are only illustrative, but not limited, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims, all of which belong to the protection of the present application.

Claims

1. A self-priming device for an engine, characterized by, The utility model relates to an engine self-suction device, comprising: an engine (1) comprising an exhaust pipe (2); a water pump (3) mounted on the side of the engine (1) and driven by the output end of the engine (1), and comprising a water inlet end (30) and a water outlet end (31); a water suction pipe (4) connected to the water inlet end (30) of the water pump (3); a Venturi tube (5) comprising an air inlet end (50), an air outlet end (51) and an air suction end (52), wherein the air inlet end (50) is connected to the side of the exhaust pipe (2), the air suction end (52) is connected to the water inlet end (30) through an air pipe (6), and the air suction end (52) is used for sucking air in the water suction pipe (4).

2. The self-priming device of an engine according to claim 1, characterized by The Venturi tube (5) further comprises: an air inlet nozzle (53) mounted on the air inlet end (50) and having a converging flow passage section (54) and a throat (55) formed inside; wherein the air outlet end (51) is provided with a diffuser flow passage section (56), the air suction end (52) is provided with an air inlet hole (57), and the throat (55) is located between the converging flow passage section (54) and the diffuser flow passage section (56), and a gas inlet flow passage (58) in communication with the air inlet hole (57) is formed between the throat (55) and the diffuser flow passage section (56).

3. The engine self-suction device according to claim 2, wherein: the air inlet end (50) is provided with a threaded hole (59).

4. The self-priming device of an engine according to claim 3, characterized by Further comprising: a first connector (7) mounted on the side of the exhaust pipe (2) and threadedly connected to the threaded hole (59); wherein the first connector (7) limits the air inlet nozzle (53) in the threaded hole (59).

5. The self-priming device of an engine according to claim 1, characterized by Further comprising: a first valve (8) mounted on the end of the exhaust pipe (2) away from the engine (1).

6. The self-priming device of an engine according to claim 1, characterized by Further comprising: a second valve (9) mounted on the side of the water inlet end (30).

7. The self-priming device of an engine according to claim 6, characterized by Further comprising: a second connector (10) mounted on the side of the water inlet end (30) and used for mounting the second valve (9).

8. The self-priming device of an engine according to claim 6, characterized by Further comprising: a pressure gauge (11) mounted on the water inlet end (30) and connected to the second valve (9) and the air pipe (6) through a tee joint.

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