Plunger pump

Abstract

The utility model relates to a plunger pump. An inlet one-way valve of the plunger pump is composed of a valve sleeve, a spring and a steel ball. A plurality of overflowing grooves are evenly distributed in the circumference of the inner wall of the valve sleeve. Through the design of the overflowing grooves, the inlet one-way valve is endowed with the overflowing capacity, and the multiple overflowing grooves are designed to be evenly distributed and uniform in pressure to enable the steel balls to be stable in consideration of the situation that pressure can act on the steel balls in the overflowing process, and consequently the steel balls are unstable (swirl).

Description

Technical Field

[0001] The utility model relates to the technical field of pumps, in particular to a plunger pump. Background Art

[0002] A plunger pump with an inlet check valve and an outlet check valve (patent number: 202023309108.9). The inlet check valve does not have the flow capacity and cannot meet its usage requirements. In addition, the sealing effect between the valve sleeve and the pump outlet bushing is poor, and the star-shaped sealing ring installed on the plunger is easily damaged. Utility Model Content

[0003] The utility model provides a plunger pump, the flow capacity of the inlet one-way valve of the plunger pump meets the use requirements of the plunger pump.

[0004] A plunger pump, wherein the inlet one-way valve of the plunger pump is composed of a valve sleeve, a spring and a steel ball; a plurality of flow grooves are evenly distributed around the inner wall of the valve sleeve.

[0005] The design of the flow grooves gives the inlet check valve the ability to pass the flow. Considering that when the flow passes, there will be pressure acting on the steel ball, causing the steel ball to be unstable (spinning), the design has multiple flow grooves evenly distributed to evenly distribute the pressure and make the steel ball stable.

[0006] The sealing surface of the lip edge on the outer periphery of the valve sleeve is a conical surface, so the sealing effect is good.

[0007] A star-shaped sealing ring is installed on the plunger of the plunger pump;

[0008] The star-shaped sealing ring includes a rubber body, which is annular, with a flat front end face, an annular protrusion I on the rear end face, an annular groove on the outer peripheral surface, and an annular protrusion II on the inner peripheral surface. The annular protrusion I and the annular protrusion II are transitioned by an undulating conical surface; the pressure resistance of the star-shaped sealing ring is improved, making it less likely to be damaged during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a cross-sectional view of a plunger pump.

[0010] Figure 2 It is a three-dimensional diagram of the valve sleeve.

[0011] Figure 3 It is a cross-sectional view of a star-shaped seal ring.

[0012] The figure shows an inlet check valve 1, a valve sleeve 1-1, a flow groove 1-1-1, a lip 1-1-2, a spring 1-2, and a steel ball 1-3; an outlet check valve 2; a pump cover 3; a pump outlet bushing 4; a plunger 5; a plunger return spring 6; a filter screen 7; a guide sleeve 8; a star-shaped sealing ring 9, a rubber body 9-1, annular protrusion I 9-2, annular groove 9-3, annular protrusion II 9-4, and an undulating cone surface 9-5. DETAILED DESCRIPTION

[0013] like Figure 1-3 As shown, a plunger pump comprises an inlet one-way valve 1, an outlet one-way valve 2, a pump cover 3, a pump outlet bushing 4, a plunger 5, a plunger return spring 6, a filter screen 7, a guide sleeve 8, and a star-shaped sealing ring 9. The inlet one-way valve 1, the outlet one-way valve 2, the pump cover 3, the pump outlet bushing 4, the plunger 5, the plunger return spring 6, the filter screen 7, the guide sleeve 8, and the star-shaped sealing ring 9 are assembled and connected together;

[0014] The inlet check valve 1 is composed of a valve sleeve 1-1, a spring 1-2, and a steel ball 1-3. Four flow grooves 1-1-1 are evenly distributed around the inner wall of the valve sleeve 1-1. The lip 1-1-2 on the outer periphery of the valve sleeve 1-1 has a conical sealing surface.

[0015] The star-shaped sealing ring 9 includes a rubber body 9-1, which is annular, with a flat front end face, an annular protrusion I 9-2 on the rear end face, an annular groove 9-3 on the outer peripheral surface, and an annular protrusion II 9-4 on the inner peripheral surface. The annular protrusion I 9-2 and the annular protrusion II 9-4 are transitioned through an undulating conical surface 9-5.

[0016] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plunger pump, wherein the inlet check valve of the plunger pump is composed of a valve sleeve, a spring, and a steel ball; characterized in that: A plurality of flow grooves are evenly distributed around the inner wall of the valve sleeve; A star-shaped sealing ring is installed on the plunger of the plunger pump; The star-shaped sealing ring includes a rubber body, which is annular, with a flat front end face, an annular protrusion I on the rear end face, an annular groove on the outer circumference, and an annular protrusion II on the inner circumference. The annular protrusion I and the annular protrusion II are transitioned through an undulating conical surface.

2. A plunger pump according to claim 1, characterized in that: The sealing surface of the lip edge on the outer periphery of the valve sleeve is a conical surface.

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