Water inlet and outlet channel structure of high-pressure pump

Abstract

The utility model relates to the technical field of high-pressure pumps, in particular to a water inlet and outlet channel structure of a high-pressure pump. The pump comprises a cylindrical pump body, a water inlet chamber and a water outlet chamber are arranged at the bottom of the pump body, the water inlet chamber is provided with a water inlet, and the water outlet chamber is provided with a water outlet. Pump heads are evenly distributed on the periphery of the pump body, and a piston cavity is formed in the pump body. The water pump is characterized in that one side of the piston cavity is provided with a transfer cavity, and the transfer cavity is respectively communicated with the piston cavity, the water inlet chamber and the water outlet chamber. A combination valve structure is arranged in the transfer cavity, and under the action of reciprocating motion of a piston in the piston cavity, the combination valve structure enables the transfer cavity to be communicated with the water inlet chamber and not to be communicated with the water outlet chamber or enables the transfer cavity to be communicated with the water outlet chamber and not to be communicated with the water inlet chamber. The plunger pump with the water outlet channel structure is small in size.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure pumps, in particular to an inlet and outlet water channel structure of a high-pressure pump. Background Art

[0002] Chinese patent application number 2022222011910 discloses a high-flow plunger pump. It mainly includes a cylindrical pump body with a gland at its mouth and an inlet chamber and an outlet chamber at its bottom. The inlet chamber has a water inlet, and the outlet chamber has a water outlet. The pump body contains a rotating shaft. An eccentrically arranged turntable is fixed to the rotating shaft. A clearance hole is provided on the upper edge of the pump body side wall corresponding to the turntable, and a transfer plug is provided in the clearance hole. A pump head is fixed on the outer wall of the pump body corresponding to the clearance hole, and a plunger hole is provided on the side wall of the pump head corresponding to the clearance hole, and a plunger is provided in the plunger hole. The pump head contains an inlet flow channel and an outlet flow channel, and both the inlet flow channel and the outlet flow channel have a one-way valve. That is, a transfer chamber for installing a one-way valve is required in both the inlet flow channel and the outlet flow channel, which occupies a large space and results in a large volume of the plunger pump. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-pressure pump inlet and outlet water channel structure. The plunger pump adopting the outlet water channel structure has a smaller volume.

[0004] To solve the above problems, the following technical solutions are provided:

[0005] The high-pressure pump water inlet and outlet structure of the present utility model includes a cylindrical pump body, with a water inlet chamber and a water outlet chamber at the bottom of the pump body, the water inlet chamber having a water inlet, and the water outlet chamber having a water outlet. Pump heads are evenly distributed around the pump body, and a piston chamber is contained within the pump body. The utility model is characterized in that a transfer chamber is provided on one side of the piston chamber, and the transfer chamber is connected to the piston chamber, the water inlet chamber, and the water outlet chamber, respectively. A combination valve structure is contained within the transfer chamber. Under the action of the reciprocating motion of the piston within the piston chamber, the combination valve structure connects the transfer chamber to the water inlet chamber but disconnects the water outlet chamber, or connects the transfer chamber to the water outlet chamber but disconnects the water inlet chamber.

[0006] The pump head and pump body corresponding to the bottom of the transfer chamber have an inlet channel connected to the water inlet chamber, and the pump head and pump body between the side wall of the transfer chamber and the water outlet chamber have an outlet channel. The combined valve structure is located in the section of the transfer chamber between the inlet channel and the outlet channel.

[0007] The combined valve structure includes a valve housing concentrically disposed within the transfer chamber. The valve housing includes a first segment and a second segment concentrically fixed from one end proximal to the water inlet passage to the other end. The outer and inner diameters of the first segment are both smaller than the outer diameter of the second segment. The outer diameter of the first segment is smaller than the inner diameter of the transfer chamber. The first segment has an upper water inlet hole. An end cap is provided on the first segment distal to the second segment. The end cap has a concentrically disposed guide hole. A first valve stem is disposed within the guide hole. The first valve stem and the guide hole form a sliding seal. A first valve core is disposed on the extended end of the first valve stem. A first compression spring is mounted on the portion of the first valve stem between the first valve core and the end cap. When the first compression spring is not subjected to external force, the first valve core abuts against the water inlet passage. The second segment body, which is away from the first segment body, has a plug at one end. The inner wall of the transfer chamber corresponding to the second segment body between the plug and the first segment body is provided with an annular groove. The outer circle of the second segment body on both sides of the annular groove is sealed with the inner wall of the transfer chamber. The second segment body corresponding to the annular groove has a water outlet. The water outlet channel is located between the bottom of the annular groove and the water outlet chamber. The second segment body has a second valve core, and a second compression spring is provided between the second valve core and the plug. When the first compression spring is in a state without external force, the second valve core is pressed against one end of the second segment body.

[0008] A connecting hole communicating with the piston cavity is provided on the side wall of the transfer cavity corresponding to the first section.

[0009] The water inlet chamber comprises an annular recess arranged along the outer side of the bottom of the pump body. A sealing cover is provided at the opening of the annular recess, and the sealing cover has a water inlet. The pump body comprises a blind hole arranged along the pump body's axial direction, with the opening of the blind hole located at the bottom of the annular recess. The blind hole is perpendicular to the transfer chamber and lies in the same plane. A first machined hole is provided between the transfer chamber and the blind hole, perpendicular to the blind hole. The machined hole and the blind hole form the water inlet channel.

[0010] The water outlet chamber comprises a central pit arranged at the center of the outer side surface of the bottom of the pump body, and the water outlet flow channel is located between the side walls of the annular groove on the side wall of the central pit.

[0011] The above solution has the following advantages:

[0012] The high-pressure pump water inlet and outlet structure of the present invention has a transfer chamber on one side of the piston chamber, which is connected to the piston chamber, the water inlet chamber, and the water outlet chamber. A combination valve structure is located within the transfer chamber. Under the action of the reciprocating motion of the piston within the piston chamber, the combination valve structure connects the transfer chamber to the water inlet chamber but disconnects the water outlet chamber, or connects the transfer chamber to the water outlet chamber but disconnects the water inlet chamber. This structure utilizes only one transfer chamber, the combination valve, and eliminates the need for two transfer chambers, significantly reducing the size of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1This is a structural diagram of the inlet and outlet water channel structure of the high-pressure pump of the utility model;

[0014] Figure 2 It is a partial cross-sectional view of the pump head and pump body with the axis of the transfer chamber as the cross-sectional plane in the water inlet and outlet structure of the high-pressure pump of the present utility model;

[0015] Figure 3 It is a cross-sectional schematic diagram of the pump body in the water inlet and outlet structure of the high-pressure pump of the utility model;

[0016] Figure 4 This is a structural diagram of the pump head in the water inlet and outlet structure of the high-pressure pump of the utility model;

[0017] Figure 5 It is a schematic diagram of a valve housing of a combined valve structure in the water inlet and outlet structure of a high-pressure pump of the present invention. DETAILED DESCRIPTION

[0018] The present invention will be described in further detail below with reference to the accompanying drawings.

[0019] like Figures 1 to 4As shown, the water inlet and outlet structure of the high-pressure pump of the present invention includes a cylindrical pump body 3, with a water inlet chamber and a water outlet chamber at the bottom of the pump body 3, the water inlet chamber having a water inlet, and the water outlet chamber having a water outlet. Pump heads 2 are evenly distributed around the pump body 3, and a piston chamber 18 is provided inside the pump body 3. A transfer chamber 17 is provided on one side of the piston chamber 18, and the transfer chamber 17 is respectively connected to the piston chamber 18, the water inlet chamber, and the water outlet chamber. A combination valve structure is provided in the transfer chamber 17. Under the action of the reciprocating motion of the piston in the piston chamber 18, the combination valve structure enables the transfer chamber 17 to communicate with the water inlet chamber but not the water outlet chamber, or enables the transfer chamber 17 to communicate with the water outlet chamber but not the water inlet chamber. An inlet channel, communicating with the water inlet chamber, is located within the pump head 2 and pump body 3 at the bottom of transfer chamber 17. An outlet channel 8 is located within the pump head 2 and pump body 3 between the sidewall of transfer chamber 17 and the water outlet chamber. A combined valve structure is located within the section of transfer chamber 17 between the inlet and outlet channels 8. The combined valve structure comprises a valve housing 16 concentrically disposed within transfer chamber 17. From one end of valve housing 16 proximal to the inlet channel, it comprises a first segment 16-1 and a second segment 16-4, which are concentrically fixed to each other. Both the outer and inner diameters of first segment 16-1 are smaller than the outer diameter of second segment 16-4. The outer diameter of the first section 16-1 is smaller than the inner diameter of the transfer chamber 17. The first section 16-1 is provided with a water inlet hole 16-2. An end cover 16-6 is provided on the end of the first section 16-1 away from the second section 16-4. A guide hole 16-5 is concentrically provided on the end cover 16-6. A first valve stem 12 is provided in the guide hole 16-5. The first valve stem 12 and the guide hole 16-5 are fitted in a sliding and sealing manner. A first valve core 6 is provided on the outwardly extending end of the first valve stem 12. A first compression spring 7 is sleeved on the section of the first valve stem 12 between the first valve core 6 and the end cover 16-6. When the first compression spring 7 is in a state without external force, the first valve core 6 is against the water inlet channel. A plug 10 is located at one end of the second segment 16-4, distal from the first segment 16-1. The inner wall of the transfer chamber 17, corresponding to the portion of the second segment 16-4 between the plug 10 and the first segment 16-1, is defined by an annular groove 19. The outer periphery of the second segment 16-4 on either side of the annular groove 19 seals against the inner wall of the transfer chamber 17. The portion of the second segment 16-4 corresponding to the annular groove 19 has a water outlet hole 16-3. The outlet channel 8 is located between the bottom of the annular groove 19 and the outlet chamber. A second valve core 11 is located within the second segment 16-4. A second compression spring 9 is located between the second valve core 11 and the plug 10. When the first compression spring 7 is unloaded, the second valve core 11 abuts against one end of the second segment 16-4. A connecting hole 15 is located on the side wall of the transfer chamber 17 corresponding to the first segment 16-1, connecting to the piston chamber 18. The force of the second compression spring 9 is greater than that of the first compression spring 7.

[0020] The water inlet chamber includes an annular recess 4 arranged around the outer side of the bottom of the pump body 3. A sealing cover 1 is located in the groove of the annular recess 4, which has a water inlet. A blind hole 5 is arranged axially within the pump body 3, with its mouth located at the bottom of the annular recess 4. The blind hole 5 is perpendicular to and coplanar with the transfer chamber 17. A first machined hole 13, perpendicular to the blind hole 5, is located between the transfer chamber 17 and the blind hole 5. The machined hole and the blind hole 5 form a water inlet channel. The water outlet chamber includes a central recess 14 located at the center of the outer side of the bottom of the pump body 3. The water outlet channel 8 is located between the sidewalls of the central recess 14 and the annular recess 19.

[0021] In this embodiment, the water inlet flow channel and the water outlet flow channel 8 are both connected by multiple sections, and each section of the water inlet flow channel and the water outlet flow channel 8 is arranged along the circumference or radial direction of the pump body 3, so as to facilitate processing.

Claims

1. A high-pressure pump inlet and outlet structure, comprising a cylindrical pump body, a water inlet chamber and a water outlet chamber at the bottom of the pump body, the water inlet chamber having a water inlet, and the water outlet chamber having a water outlet; pump heads are evenly distributed around the pump body, and a piston chamber is provided in the pump body; characterized in that: There is a transfer chamber on one side of the piston chamber, which is respectively connected to the piston chamber, water inlet chamber and water outlet chamber; there is a combination valve structure in the transfer chamber, and under the action of the reciprocating movement of the piston in the piston chamber, the combination valve structure makes the transfer chamber connected to the water inlet chamber and disconnected from the water outlet chamber, or the transfer chamber connected to the water outlet chamber and disconnected from the water inlet chamber.

2. The high-pressure pump inlet and outlet water channel structure according to claim 1, characterized in that: The pump head and pump body corresponding to the bottom of the transfer chamber have an inlet channel connected to the water inlet chamber, and the pump head and pump body between the side wall of the transfer chamber and the water outlet chamber have an outlet channel. The combined valve structure is located in the section of the transfer chamber between the inlet channel and the outlet channel.

3. The high-pressure pump inlet and outlet water channel structure according to claim 2, characterized in that: The combined valve structure includes a valve housing concentrically arranged in the transfer chamber, and the valve housing includes a first section body and a second section body that are concentrically fixed from one end close to the water inlet flow channel to the other end, and the outer diameter and inner diameter of the first section body are both smaller than the outer diameter of the second section body; the outer diameter of the first section body is smaller than the inner diameter of the transfer chamber, the first section body has a water inlet hole, and the first section body is provided with an end cover at one end away from the second section body, a guide hole is concentrically arranged on the end cover, a first valve stem is provided in the guide hole, the first valve stem and the guide hole are fitted in a sliding seal, a first valve core is provided on the outward-extending end of the first valve stem, and a first compression spring is sleeved on the first valve stem between the first valve core and the end cover, When the first compression spring is in a state of no external force, the first valve core is in abutment against the water inlet channel; there is a plug in one end of the second section body away from the first section body, and there is an annular groove on the inner wall of the transfer chamber corresponding to the second section body between the plug and the first section body, and the outer circle of the second section body on both sides of the annular groove is sealed with the inner wall of the transfer chamber, and there is a water outlet hole on the second section body corresponding to the annular groove; the water outlet channel is located between the bottom of the annular groove and the water outlet chamber; there is a second valve core in the second section body, and a second compression spring is provided between the second valve core and the plug, and when the first compression spring is in a state of no external force, the second valve core is in abutment against one end of the second section body.

4. The high-pressure pump water inlet and outlet structure according to claim 2, characterized in that: A connecting hole communicating with the piston cavity is provided on the side wall of the transfer cavity corresponding to the first section.

5. The high-pressure pump water inlet and outlet structure according to claim 2, characterized in that: The water inlet chamber includes an annular pit arranged around the outer side surface of the bottom of the pump body, a sealing cover is provided at the pit mouth of the annular pit, and the sealing cover has a water inlet; a blind hole is provided in the pump body along the axial direction of the pump body, the mouth of the blind hole is located at the bottom of the annular pit, the blind hole is perpendicular to the transfer chamber and in the same plane, a first processed hole perpendicular to the blind hole is provided between the transfer chamber and the blind hole, and the processed hole and the blind hole form the water inlet channel.

6. The high-pressure pump water inlet and outlet structure according to claim 2, characterized in that: The water outlet chamber comprises a central pit arranged at the center of the outer side surface of the bottom of the pump body, and the water outlet flow channel is located between the side walls of the annular groove on the side wall of the central pit.

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