Pump body assembly of gasoline engine

Abstract

The utility model relates to an infusion pump, in particular to a gasoline engine pump body assembly which solves the sealing problem of an infusion pump. Comprising a shell, an adapter, a door cover and a volute body, an inlet port and an outlet port are formed in the shell, a cavity for containing the volute body is formed in the shell, openings connected with the inlet port and the outlet port respectively are formed in the volute body, an impeller is arranged in the volute body, the shell is connected with the adapter at the outlet port in a sealed mode, and the adapter is connected with the volute body in a sealed mode. The shell is in sealing connection with the door cover at the inlet port, the shell opens and closes the inlet port through the door cover, the shell comprises a shell cover and a shell seat, a first convex step position is arranged in the center of the shell seat, step-shaped sealing structures are adopted at multiple positions, positioning design is matched, vibration and polarization influences are greatly reduced, and the sealing performance and the using effect are improved.

Description

Technical Field

[0001] The utility model relates to a liquid pump, in particular to a gasoline engine pump body assembly. Background Art

[0002] There are many types of gasoline engine pumps, and the right product should be selected according to different uses. Regardless of manual or automatic operation, most of the structures contain impellers, which form a relative negative pressure through the rotation of the impeller, thereby pulling the liquid from one end to the other. However, many product designs are not delicate enough, and after a period of use, the sealing ring is prone to deformation and extrusion, or parts vibrate and deviate. The above further causes penetration and leakage, which brings inconvenience to the maintenance and use of the equipment. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the utility model provides a gasoline engine pump body assembly.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a gasoline engine pump body assembly, including a shell, an adapter, a door cover and a volute, the shell is provided with an inlet port and an outlet port, the shell is provided with a chamber for accommodating the volute, the volute is provided with openings respectively connected to the inlet port and the outlet port, the volute is provided with an impeller, the shell is sealed with the adapter at the outlet port, the shell is sealed with the door cover at the inlet port, the shell opens and closes the inlet port through the door cover, the shell includes a shell cover and a shell seat, a raised first convex step is provided at the center of the shell seat, the shell cover is provided with a first concave step corresponding to the first convex step, the first convex step and the first concave step are matched with each other, a first sealing ring is provided between the shell cover and the shell seat, and the first sealing ring is located between the first convex step and the first concave step.

[0005] The shell is provided with a second concave step at the outlet, and one end of the adapter is provided with a second convex step. The second convex step matches the second concave step in a concave-convex manner, and a second sealing ring is provided between the second convex step and the second concave step.

[0006] A third concave step is provided at the inlet port, a third convex step of the third concave step is provided on the door cover, the third concave step and the third convex step are matched with each other, and an opening and closing valve plate is provided between the third concave step and the third convex step.

[0007] A rotatably connected opening and closing portion is provided in the center of the opening and closing valve sheet.

[0008] The opening and closing valve plate is provided with a connecting hole at the outer edge thereof which penetrates to the door cover.

[0009] The shell, adapter, door cover and volute are integrally injection-molded from glass fiber-containing polyphenylene sulfide.

[0010] The volute is provided with a positioning portion on the outer side wall, and the positioning portion and the first convex step are provided with corresponding positioning holes.

[0011] The impeller comprises an integrally connected impeller disk and blades, the blades are arc-shaped structures, and the blades are evenly arranged along the circumference of the impeller disk, and the inner side of the concave blade faces the center of the impeller disk.

[0012] The shell seat is provided with a positioning cut surface on the radial outer wall, and the shell cover is provided with a positioning protrusion which fits with the positioning cut surface.

[0013] Beneficial effects of the utility model: The gasoline engine pump body assembly provided by the utility model adopts a stepped sealing structure at multiple locations, and cooperates with the positioning design to greatly reduce the influence of vibration and polarization, and improve the sealing performance and use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0015] like Figure 1 As shown, a gasoline engine pump body assembly includes a housing 1, an adapter 2, a door cover 3 and a volute 4. The housing 1 is provided with an inlet port 5 and an outlet port 6. The housing 1 is provided with a chamber for accommodating the volute 4. The volute 4 is provided with an opening 7 respectively connected to the inlet port 5 and the outlet port 6. The volute 4 is provided with an impeller 8. The housing 1 is sealed with the adapter 2 at the outlet port 6. The housing 1 is sealed with the door cover 3 at the inlet port 5. The housing 1 opens and closes the inlet port 5 through the door cover 3. The above is a basic layout. It should be pointed out that the positions of the inlet port 5 and the outlet port 6 can be interchanged according to the needs of use, but are not limited to this. This product is designed with a port for liquid inlet and outlet, and an impeller 8 is designed inside the housing 1. The relative vacuum or negative pressure is generated by the rotation of the impeller 8, thereby guiding the flow of the liquid. The door cover 3 is designed to realize the function of a one-way valve. The specific implementation methods are various, and they are not elaborated or limited here.

[0016] The shell 1 includes a shell cover 9 and a shell seat 10. The center of the shell seat 10 is provided with a raised first convex step 11. The shell cover 9 is provided with a first concave step corresponding to the first convex step 11. The first convex step 11 and the first concave step are matched with each other. A first sealing ring is provided between the shell cover 9 and the shell seat 10, and the first sealing ring is located between the first convex step 11 and the first concave step. The cooperation between the first convex step 11 and the first concave step can form a labyrinth seal, even if the liquid medium passes through a narrow and tortuous path to achieve a sealing effect. At the same time, on this basis, the first sealing ring is limited by the shell cover 9 and the shell seat 10 in the axial direction, and is limited by the first convex step 11 and the first concave step in the radial direction, so as to ensure that the first sealing ring is not seriously deformed or displaced during long-term use. At the same time, the first sealing ring can be selected to have a specification size that can fill the space, so that the part has a more integrated effect, which is conducive to stability and sealing.

[0017] The shell seat 10 is provided with a positioning cut surface 21 on the radial outer wall, and the shell cover 9 is provided with a positioning protrusion that fits with the positioning cut surface 21, which is conducive to the shell seat 10 and the shell cover 9 to fit flush after installation and can also be tightly pressed together during use.

[0018] The housing 1 is provided with a second concave step 12 at the outlet port 6, and a second convex step is provided at one end of the adapter 2. The second convex step is matched with the second concave step 12 in a concave-convex manner, and a second sealing ring is provided between the second convex step and the second concave step 12. The inlet port 5 is provided with a third concave step 13, and the door cover 3 is provided with a third convex step of the third concave step 13. The third concave step 13 and the third convex step are matched in a concave-convex manner, and an opening and closing valve plate 14 is provided between the third concave step 13 and the third convex step. Similarly, the local sealing and integrity are further improved by concave-convex matching and labyrinth sealing, and the assembly gap and vibration can also be reduced. The opening and closing valve plate 14 is provided with a rotatably connected opening and closing portion 15 in the center. The opening and closing valve plate 14 here is mostly formed of rubber material in one piece, and the surrounding of the opening and closing portion 15 is hollowed out, leaving only one place to connect the opening and closing valve plate 14, and the one-way opening and closing is achieved by rotating the stop limit, which is a mature technical means, and is not limited to this.

[0019] The opening and closing valve plate 14 is provided with a connection hole 16 at the outer edge that passes through to the door cover 3, which is conducive to the positioning and connection of the opening and closing valve plate 14 during installation, and can be reset even if there is an offset. The housing 1, adapter 2, door cover 3 and volute 4 are integrally injection molded by polyphenylene sulfide containing glass fiber. Polyphenylene sulfide, also known as PPS, is a new type of high-performance thermoplastic resin with the advantages of high mechanical strength, high temperature resistance, chemical resistance, flame retardancy, good thermal stability, excellent electrical properties, etc. It is widely used in electronics, automobiles, machinery and chemical fields. In addition, the addition of glass fiber during the molding of polyphenylene sulfide is conducive to further improving the mechanical properties and certain chemical resistance.

[0020] The volute 4 is provided with a positioning portion 17 on the outer wall, and a relative positioning hole 18 is provided on the positioning portion 17 and the first convex step 11. Similarly, the internal positioning connection is conducive to the stable installation of the volute 4, strengthens the connection between parts, and is conducive to avoiding displacement and reducing vibration. At this point, the positioning portion 17 is extended and formed along an annular path, so the leakage path is relatively longer, and the sealing performance can be further improved. The impeller 8 includes an integrally connected blade disk 19 and blades 20. The blades 20 are arc-shaped structures, and the blades 20 are evenly arranged along the circumference of the blade disk 19. The inner side of the recess of the blade 20 faces the center of the blade disk 19. The shape and layout of the blades 20 are relatively simple and ingenious. When rotating, the blades 20 exhaust the gas or drive the liquid to flow to form a relative vacuum. The pressure-bearing direction is consistent with the flow direction, which is conducive to ensuring both the use effect and the service life.

[0021] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. At the same time, the basic principles, main features and advantages of the present invention are shown and described above, which should be understood by technicians in this industry.

Claims

1. A gasoline engine pump assembly, characterized in that: The invention comprises a shell, an adapter, a door cover and a volute, wherein the shell is provided with an inlet port and an outlet port, the shell is provided with a chamber for accommodating the volute, the volute is provided with openings respectively connected to the inlet port and the outlet port, the volute is provided with an impeller, the shell is sealed with the adapter at the outlet port, the shell is sealed with the door cover at the inlet port, the shell opens and closes the inlet port through the door cover, the shell comprises a shell cover and a shell seat, a raised first convex step is provided at the center of the shell seat, the shell cover is provided with a first concave step corresponding to the first convex step, the first convex step and the first concave step are matched with each other, a first sealing ring is provided between the shell cover and the shell seat, and the first sealing ring is located between the first convex step and the first concave step.

2. A gasoline engine pump assembly as claimed in claim 1, characterized in that: The shell is provided with a second concave step at the outlet, and one end of the adapter is provided with a second convex step. The second convex step matches the second concave step in a concave-convex manner, and a second sealing ring is provided between the second convex step and the second concave step.

3. A gasoline engine pump assembly as claimed in claim 1 or 2, characterized in that: A third concave step is provided at the inlet port, a third convex step of the third concave step is provided on the door cover, the third concave step and the third convex step are matched with each other, and an opening and closing valve plate is provided between the third concave step and the third convex step.

4. A gasoline engine pump assembly as claimed in claim 3, characterized in that: A rotatably connected opening and closing portion is provided in the center of the opening and closing valve sheet.

5. A gasoline engine pump assembly as claimed in claim 4, characterized in that: The opening and closing valve plate is provided with a connecting hole at the outer edge thereof which penetrates to the door cover.

6. A gasoline engine pump assembly as claimed in claim 5, characterized in that: The shell, adapter, door cover and volute are integrally injection-molded from glass fiber-containing polyphenylene sulfide.

7. A gasoline engine pump assembly as claimed in claim 1, characterized in that: The volute is provided with a positioning portion on the outer side wall, and the positioning portion and the first convex step are provided with corresponding positioning holes.

8. A gasoline engine pump assembly as claimed in claim 1, characterized in that: The impeller comprises an integrally connected impeller disk and blades, the blades are arc-shaped structures, and the blades are evenly arranged along the circumference of the impeller disk, and the inner side of the concave blade faces the center of the impeller disk.

9. A gasoline engine pump assembly as claimed in claim 1, characterized in that: The shell seat is provided with a positioning cut surface on the radial outer wall, and the shell cover is provided with a positioning protrusion which fits with the positioning cut surface.

Images