Small gasoline engine pump

Abstract

The utility model provides a small gasoline engine pump, and belongs to the technical field of movable water pumps. The device comprises a cart and a water pumping mechanism arranged on the cart, the water pumping mechanism comprises a centrifugal pump and a gasoline engine used for driving the centrifugal pump to work, the cart is further provided with a Venturi exhaust device connected with a water inlet pipe of the centrifugal pump, and a check valve is arranged at a water outlet pipe of the centrifugal pump. A built-in oil tank structure is further arranged in the cart. The venturi exhaust device has the advantages of being small in size, light in weight, large in exhaust amount and high in exhaust speed, and the venturi exhaust device is adopted as an exhaust mechanism of the centrifugal pump, so that the defects of a traditional exhaust structure can be effectively overcome; the check valve is arranged at the position of the water outlet pipe so that the air inlet can be automatically closed under the action of atmospheric pressure when the water pump is vacuumized, vacuumizing is facilitated, and the built-in fuel tank structure can add a fuel tank under the condition that the size of equipment is not increased so as to increase the cruising ability of the equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of mobile water pumps and relates to a small gasoline engine pump. Background Art

[0002] Small water pumps powered by gasoline and diesel engines have been developed in China for many years. These small gasoline and diesel engine pumps are widely used in agricultural irrigation, garden sprinkler irrigation, emergency drainage, forest fire water supply and other industries. Most of the early small gasoline and diesel engine pumps were imported products and technologies from abroad. With the full development of the domestic market in various fields over the years, domestic manufacturers have generally achieved domestic substitution, and the production technology of gasoline and diesel engines and water pumps has become increasingly mature, and eventually became the main force in the market.

[0003] The advantages of small gasoline and diesel engine pumps are small size, light weight, low price, easy to move and use, and the structural design of each manufacturer is different. For users, small gasoline and diesel engine pumps are popular because of the above advantages, but users are most concerned about the quality and performance of small gasoline and diesel engine pumps, which are mainly reflected in the self-priming performance, product stability, durability and maintenance convenience of small gasoline and diesel engine pumps. At present, the self-priming function of most small gasoline and diesel engine pumps on the market has two structural methods: one is to install a manual vacuum pump at the water outlet of the water pump, which is the same as the principle of the old-fashioned well water pump. Before the water pump works, it is necessary to add water to the vacuum pump continuously by hand, and then continuously press down and lift the handle to gradually exhaust the air in the water inlet pipe and the water pump chamber. Under the negative pressure of the vacuum, the external water flow is introduced into the water pump chamber. At this time, the exhaust action is stopped, and the water pump can absorb and supply water after starting. The second method is to install a gate valve at the water outlet of the small gasoline and diesel engine pump, and connect a rotary vane vacuum pump to the water inlet through a suction hose. The vacuum pump is powered by a battery. Before the small gasoline and diesel engine pump starts working, the gate valve is manually closed and the vacuum pump is started to evacuate the water pump. When the water flow in the water pump chamber is introduced, the engine is started and the gate valve is opened to start working.

[0004] However, the above two exhaust structures have the following disadvantages: 1. The manual vacuum pump exhaust type small gasoline and diesel engine pump takes a long time to exhaust, and it is necessary to continuously add water to the vacuum pump before exhausting, resulting in slow exhaust efficiency. It is also necessary to separately equip water taking and adding equipment, which is inconvenient and not fast to operate as a whole; 2. The rotary vane vacuum pump does not need to add water to the water pump when exhausting, and the exhaust time is much faster than the manual vacuum pump exhaust. However, this type of vacuum pump is generally large in size, heavy in weight, and troublesome to maintain, requiring certain professional knowledge. Under the condition of meeting the requirement of fast exhaust, it loses some inherent advantages of small gasoline and diesel engine pumps, such as size and weight; 3. In addition to the above disadvantages, the small gasoline and diesel engine pumps of the above two exhaust methods have another common disadvantage: in order to minimize the size and weight of small gasoline and diesel engines, small gasoline and diesel engines generally can only be without or with a very small fuel tank, resulting in the small gasoline and diesel engine pump being unable to work independently or continuously for a long time.

[0005] For example, a Chinese patent discloses a self-service movable water pump [application number: 202110950671.4], which includes a frame, moving wheels, an electric pump, a battery, a power box and an energy box. The moving wheels are installed on the frame, the power box is installed on the frame, the energy box is installed on the frame, the electric pump is placed in the power box, the battery is connected to the electric pump, and a push rod and a hanging rod are provided on the frame, and a hanging ring is provided on the hanging rod. Utility Model Content

[0006] The purpose of the utility model is to provide a small gasoline engine pump in view of the above problems.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A small gasoline engine pump comprises a cart and a pumping mechanism arranged on the cart, the pumping mechanism comprises a centrifugal pump and a gasoline engine for driving the centrifugal pump to work, the cart is also provided with a Venturi exhaust device connected to a water inlet pipe of the centrifugal pump, a check valve is arranged at a water outlet pipe of the centrifugal pump, and a built-in oil tank structure is also arranged in the cart.

[0009] In the above-mentioned small gasoline engine pump, the Venturi exhaust device includes a Venturi valve and an air compressor, the Venturi valve is connected to the water inlet pipe through a connecting pipe, the Venturi valve is also connected to an air inlet pipe and an exhaust pipe, and the Venturi valve is connected to the high-pressure exhaust port of the air compressor through the air inlet pipe.

[0010] In the above-mentioned small gasoline engine pump, a vacuum gauge is arranged on the connecting pipe.

[0011] In the above-mentioned small gasoline engine pump, a stop valve is arranged on the connecting pipe.

[0012] In the above-mentioned small gasoline engine pump, a Ball-type quick connector is provided at the end of the water inlet pipe.

[0013] In the above-mentioned small gasoline engine pump, a screw-on water hose quick connector is provided at the end of the water outlet pipe.

[0014] In the above-mentioned small gasoline engine pump, the built-in fuel tank structure includes a built-in positive pressure fuel tank and a built-in fuel storage tank.

[0015] In the above-mentioned small gasoline engine pump, the cart is composed of a vertically arranged upper frame member and a horizontally arranged lower frame member, the upper frame member is formed by a combination of a plurality of closed hollow pipes and hollow plates, the internal spaces of the plurality of hollow pipes and hollow plates in the upper frame member are interconnected to form a built-in positive pressure fuel tank, and a refueling port is provided on the built-in positive pressure fuel tank.

[0016] In the above-mentioned small gasoline engine pump, the lower frame member is formed by a combination of a number of closed hollow pipes and hollow plates, the internal spaces of the several hollow pipes and hollow plates in the lower frame member are interconnected to form a built-in fuel storage tank, and the built-in fuel storage tank and the built-in positive pressure fuel tank are connected.

[0017] In the above-mentioned small gasoline engine pump, the upper frame member and the lower frame member are detachably arranged, and the height of the connection between the upper frame member and the lower frame member is higher than the lowest point of the gasoline engine's oil suction pipe.

[0018] Compared with the existing technology, the advantages of the utility model are:

[0019] 1. The Venturi exhaust device has the advantages of small size, light weight, large exhaust volume and fast exhaust speed. The use of the Venturi exhaust device as the exhaust mechanism of the centrifugal pump in this application can effectively solve the disadvantages of the traditional exhaust structure. A check valve is arranged at the water outlet pipe, which can automatically close the air inlet under the action of atmospheric pressure when the water pump is vacuuming, so as to facilitate vacuuming. The built-in fuel tank structure can add a fuel tank to increase the endurance of the equipment without increasing the volume of the equipment.

[0020] 2. The high-pressure gas output from the high-pressure exhaust port of the air compressor can be transported to the Venturi valve through the intake pipe and then discharged through the exhaust pipe. In this process, negative pressure can be formed at the Venturi valve, so that the air in the centrifugal pump can be pumped out from the water inlet pipe through the connecting pipe.

[0021] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the back side of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the front side of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the side surface of the utility model;

[0026] Figure 5 It is a top view of the utility model;

[0027] Figure 6 It is a schematic diagram of the structure of the Venturi exhaust device;

[0028] Figure 7 It is a schematic diagram of the structure of the cart.

[0029] In the figure, a cart 1, a pumping mechanism 2, a centrifugal pump 3, a gasoline engine 4, a water inlet pipe 5, a Venturi exhaust device 6, a water outlet pipe 7, a check valve 8, a built-in fuel tank structure 9, a Venturi valve 10, an air compressor 11, a connecting pipe 12, an air inlet pipe 13, an exhaust pipe 14, a vacuum gauge 15, a stop valve 16, a Ball-type quick connector 17, a screw-on hose quick connector 18, a built-in positive pressure fuel tank 19, a built-in fuel storage tank 20, an upper frame member 21, a lower frame member 22, and a fuel filler port 23. DETAILED DESCRIPTION

[0030] like Figure 1-Figure 7 As shown, a small gasoline engine pump comprises a cart 1 and a pumping mechanism 2 arranged on the cart 1, wherein the pumping mechanism 2 comprises a centrifugal pump 3 and a gasoline engine 4 for driving the centrifugal pump 3 to work, and the cart 1 is also provided with a Venturi exhaust device 6 connected to a water inlet pipe 5 of the centrifugal pump 3, a check valve 8 is provided at a water outlet pipe 7 of the centrifugal pump 3, and the cart 1 is also provided with a built-in oil tank structure 9.

[0031] In the utility model, the Venturi exhaust device 6 has the advantages of small size, light weight, large exhaust volume and fast exhaust speed. The use of the Venturi exhaust device 6 as the exhaust mechanism of the centrifugal pump in this application can effectively solve the disadvantages of the traditional exhaust structure. A check valve 8 is arranged at the water outlet pipe 7, which can automatically close the air inlet under the action of atmospheric pressure when the water pump is vacuuming, thereby facilitating vacuuming. The built-in fuel tank structure 9 can add a fuel tank to increase the endurance of the equipment without increasing the volume of the equipment.

[0032] Specifically, the Venturi exhaust device 6 includes a Venturi valve 10 and an air compressor 11. The Venturi valve 10 is connected to the water inlet pipe 5 through a connecting pipe 12. The Venturi valve 10 is also connected to an air inlet pipe 13 and an air exhaust pipe 14. The Venturi valve 10 is connected to the high-pressure exhaust port of the air compressor 11 through the air inlet pipe 13. The high-pressure gas output from the high-pressure exhaust port of the air compressor can be transported to the Venturi valve 10 through the air inlet pipe 13 and then discharged through the exhaust pipe 14. In this process, negative pressure can be formed at the Venturi valve 10, so that the air in the centrifugal pump can be pumped out from the water inlet pipe 5 through the connecting pipe 12 using the negative pressure.

[0033] Preferably, a vacuum gauge 15 is provided on the connecting pipe 12, and the vacuum gauge 15 is used to monitor the vacuum degree at the connecting pipe.

[0034] Preferably, a stop valve 16 is provided on the connecting pipe 12, and the opening and closing of the connecting pipe can be controlled by the stop valve.

[0035] Preferably, a Ball-type quick connector 17 is provided at the end of the water inlet pipe 5 to facilitate the quick connection of the water inlet pipe of the centrifugal pump to the negative pressure-resistant water inlet hose.

[0036] Preferably, a screw-on hose quick connector 18 is provided at the end of the water outlet pipe 7 to facilitate quick connection of the water outlet hose.

[0037] Specifically, the built-in fuel tank structure 9 includes a built-in positive pressure fuel tank 19 and a built-in fuel storage tank 20. The cart 1 is composed of a vertically arranged upper frame member 21 and a horizontally arranged lower frame member 22. The upper frame member 21 is formed by a combination of a plurality of closed hollow pipes and hollow plates. The internal spaces of the plurality of hollow pipes and hollow plates in the upper frame member 21 are interconnected to form a built-in positive pressure fuel tank 19. A refueling port 23 is provided on the built-in positive pressure fuel tank 19. By using the space in the hollow pipes and hollow plates constituting the upper frame member 21 to form the built-in positive pressure fuel tank 19, a fuel tank can be added without increasing the volume of the device to increase the endurance of the device.

[0038] Alternatively, the upper frame member 21 may also be in an arch shape, which is fixedly connected to the front and rear ends of the lower frame member 22, and the pumping mechanism 2 is arranged between the upper frame member 21 and the lower frame member 22. The upper frame member 21 in this embodiment can increase the stability of the installation of the pumping mechanism.

[0039] Specifically, the lower frame member 22 is formed by a combination of a plurality of hollow pipes and hollow plates that are arranged in a closed manner. The internal spaces of the plurality of hollow pipes and hollow plates in the lower frame member 22 are interconnected to form a built-in fuel storage tank 20, and the built-in fuel storage tank 20 is connected to the built-in positive pressure fuel tank 19. By forming the built-in fuel storage tank 20 by using the space in the hollow pipes and hollow plates that constitute the lower frame member 22, an oil storage tank that can be used to replenish the built-in positive pressure fuel tank 19 can be added without increasing the volume of the device, which can further increase the endurance of the device.

[0040] Preferably, the upper frame member 21 and the lower frame member 22 are detachably arranged to facilitate assembly and disassembly of a small gasoline engine pump, and the height of the connection between the upper frame member 21 and the lower frame member 22 is higher than the lowest point of the oil suction pipe of the gasoline engine 4.

[0041] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0042] Although this article uses the cart 1, pumping mechanism 2, centrifugal pump 3, gasoline engine 4, water inlet pipe 5, Venturi exhaust device 6, water outlet pipe 7, check valve 8, built-in fuel tank structure 9, Venturi valve 10, air compressor 11, connecting pipe 12, air inlet pipe 13, exhaust pipe 14, vacuum gauge 15, stop valve 16, Ball-type quick connector 17, screw-on hose quick connector 18, built-in positive pressure fuel tank 19, built-in fuel storage tank 20, upper frame member 21, lower frame member 22, fuel filler port 23, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A small gasoline engine pump, comprising a cart (1) and a pumping mechanism (2) arranged on the cart (1), wherein the pumping mechanism (2) comprises a centrifugal pump (3) and a gasoline engine (4) for driving the centrifugal pump (3), characterized in that: The cart (1) is also provided with a Venturi exhaust device (6) connected to the water inlet pipe (5) of the centrifugal pump (3), a check valve (8) is provided at the water outlet pipe (7) of the centrifugal pump (3), and a built-in oil tank structure (9) is also provided in the cart (1).

2. A small gasoline engine pump according to claim 1, characterized in that: The Venturi exhaust device (6) comprises a Venturi valve (10) and an air compressor (11); the Venturi valve (10) is connected to the water inlet pipe (5) via a connecting pipe (12); an air inlet pipe (13) and an exhaust pipe (14) are also connected to the Venturi valve (10); the Venturi valve (10) is connected to the high-pressure exhaust port of the air compressor (11) via the air inlet pipe (13).

3. A small gasoline engine pump according to claim 2, characterized in that: A vacuum gauge (15) is provided on the connecting pipe (12).

4. A small gasoline engine pump according to claim 2, characterized in that: The connecting pipe (12) is provided with a stop valve (16).

5. A small gasoline engine pump according to any one of claims 1 to 4, characterized in that: The end of the water inlet pipe (5) is provided with a Ball-type quick connector (17).

6. A small gasoline engine pump according to any one of claims 1 to 4, characterized in that: The end of the water outlet pipe (7) is provided with a screw-on water hose quick connector (18).

7. A small gasoline engine pump according to any one of claims 1 to 4, characterized in that: The built-in fuel tank structure (9) comprises a built-in positive pressure fuel tank (19) and a built-in fuel storage tank (20).

8. A small gasoline engine pump according to claim 7, characterized in that: The cart (1) is composed of a vertically arranged upper frame member (21) and a horizontally arranged lower frame member (22); the upper frame member (21) is formed by a combination of a plurality of closed hollow pipes and hollow plates; the internal spaces of the plurality of hollow pipes and hollow plates in the upper frame member (21) are interconnected to form a built-in positive pressure fuel tank (19); and a refueling port (23) is provided on the built-in positive pressure fuel tank (19).

9. A small gasoline engine pump according to claim 8, characterized in that: The lower frame member (22) is formed by a combination of a plurality of hollow pipes and hollow plates that are arranged in a closed manner. The internal spaces of the plurality of hollow pipes and hollow plates in the lower frame member (22) are interconnected to form a built-in fuel storage tank (20), and the built-in fuel storage tank (20) is connected to the built-in positive pressure fuel tank (19).

10. A small gasoline engine pump according to claim 9, characterized in that: The upper frame component (21) and the lower frame component (22) are detachably arranged, and the height of the connection between the upper frame component (21) and the lower frame component (22) is higher than the lowest point of the oil suction pipe of the gasoline engine (4).

Images