阅读说明：本技术 一种新型轴向柱塞泵阀配流机构及配流方法 (Novel axial plunger pump valve flow distribution mechanism and flow distribution method ) 是由 岳艺明 张小龙 张华扬 于 2020-06-01 设计创作，主要内容包括：本发明公开了一种新型轴向柱塞泵阀配流机构及配流方法,解决了传统阀配流结构复杂、占用空间大、工艺孔道多、安装调试难度大等问题。该机构包括缸体、进液阀组件、缸体后端盖、O型密封圈、配流轴、排液阀组件；缸体、配流轴与缸体后端盖固定连接,O型密封圈保证两个配合面的密封；配流轴与缸体中心孔过盈配合；进液阀组件安装于缸体的吸液孔中,其进液阀弹簧挡圈保证进液阀阀芯做直线运动；排液阀组件安装于配流轴排液孔中,其排液阀弹簧挡圈保证排液阀阀芯做直线运动；本发明通过螺纹安装进、排液阀组件,安装拆卸方便；将10套排液阀组件集成在配流轴上,结构紧凑；通过进液阀和排液阀的开启和关闭实现对轴向柱塞泵的稳定配流。(The invention discloses a novel valve flow distribution mechanism and a flow distribution method for an axial plunger pump, and solves the problems of complex flow distribution structure, large occupied space, multiple process channels, high installation and debugging difficulty and the like of the traditional valve. The mechanism comprises a cylinder body, a liquid inlet valve component, a cylinder body rear end cover, an O-shaped sealing ring, a flow distribution shaft and a liquid discharge valve component; the cylinder body, the flow distribution shaft and the rear end cover of the cylinder body are fixedly connected, and the O-shaped sealing ring ensures the sealing of two matching surfaces; the flow distribution shaft is in interference fit with the central hole of the cylinder body; the liquid inlet valve component is arranged in a liquid suction hole of the cylinder body, and a liquid inlet valve spring retainer ring of the liquid inlet valve component ensures that a valve core of the liquid inlet valve does linear motion; the liquid discharge valve component is arranged in a liquid discharge hole of the valve shaft, and a liquid discharge valve spring retainer ring of the liquid discharge valve component ensures that a valve core of the liquid discharge valve does linear motion; the liquid inlet and outlet valve assembly is mounted through threads, so that the mounting and dismounting are convenient; the 10 sets of liquid discharge valve assemblies are integrated on the valve shafts, so that the structure is compact; the stable flow distribution of the axial plunger pump is realized by opening and closing the liquid inlet valve and the liquid outlet valve.)

1. A novel axial plunger pump valve flow distribution mechanism is characterized by comprising a cylinder body (1), a liquid inlet valve component, a cylinder body rear end cover (6), a flow distribution shaft (8) and a liquid discharge valve component;

the cylinder body (1) is respectively connected with a cylinder body rear end cover (6) and a plunger pump front shell through an upper end face and a lower end face, and the center of the cylinder body (1) is provided with a cylindrical center hole for mounting a flow distribution shaft (8); the plunger holes are uniformly distributed on the cylinder body (1) along the circumference, and the circle center of the circumference is the center of the cylinder body; the upper part of the cylinder body (1) is a cylinder body cavity which is used for introducing fluid outside the pump into the cylinder body (1);

the liquid inlet valve assembly comprises a liquid inlet valve spring retainer ring (2), a liquid inlet valve spring (3), a liquid inlet valve core (4) and a liquid inlet valve seat (5), the liquid inlet valve assembly is installed in a liquid suction hole of the cylinder body (1), one side of the liquid inlet valve seat (5) is provided with a conical sealing surface, the conical sealing surface is installed at a liquid suction port of a plunger hole of the cylinder body, and the conical sealing surface faces the plunger hole of the cylinder body; one side of the valve core (4) of the liquid inlet valve is a spherical sealing surface, and the other side of the valve core is a guide rod; the middle of the liquid inlet valve spring retainer ring (2) is provided with a central guide hole, and the liquid inlet valve spring retainer ring (2) is arranged in a plunger hole of the cylinder body; a liquid inlet valve core (4) and a liquid inlet valve spring (3) are arranged between a liquid inlet valve spring retainer ring (2) and a liquid inlet valve seat (5), one end of the liquid inlet valve spring (3) is pressed on the liquid inlet valve spring retainer ring (2), the other end of the liquid inlet valve spring is pressed on the liquid inlet valve core (4), a guide rod of the liquid inlet valve core (4) penetrates through central guide holes of the liquid inlet valve spring (3) and the liquid inlet valve spring retainer ring (2), a spherical surface sealing surface of the liquid inlet valve core (4) faces a conical sealing surface of the liquid inlet valve seat (5), and the liquid inlet valve core (4) can move along the direction of a plunger hole of a cylinder under the action of the guide rod, so that the opening degree between the spherical surface of the liquid inlet valve core (4) and the conical surface; the liquid inlet valve component and the cylinder cavity at the upper part of the cylinder body (1) complete the liquid suction action of the plunger pump together;

the whole of the valve shaft (8) is a rotary part, ten liquid discharging holes are uniformly distributed on the periphery of the rotary part, the ten liquid discharging holes correspond to ten cylinder plunger holes in the cylinder body (1) one by one, and a liquid outlet hole is formed in the center of the valve shaft (8) and is used for discharging fluid flowing through the liquid discharging valve component out of the plunger pump through a liquid outlet; the valve shaft (8) is fixedly connected with the rear end cover (6) of the cylinder body;

the liquid discharge valve assembly comprises a liquid discharge valve spring retainer ring (9), a liquid discharge valve spring (10), a liquid discharge valve core (11) and a liquid discharge valve seat (12); one side of the liquid discharge valve seat (12) is provided with a conical sealing surface which is arranged in a liquid discharge hole of the valve spindle, and the conical sealing surface faces the valve spindle; one side of the valve core (11) of the liquid discharge valve is a spherical sealing surface, and the other side of the valve core is a guide rod; the middle of the liquid discharge valve spring retainer ring (9) is provided with a central guide hole, and the liquid discharge valve spring retainer ring (9) is arranged in a liquid discharge hole of the valve shaft (8); a drain valve core (11) and a drain valve spring (10) are installed between a drain valve spring retainer ring (9) and a drain valve seat (12), one end of the drain valve spring (10) is pressed on the drain valve spring retainer ring (9), the other end of the drain valve spring (10) is pressed on the drain valve core (11), a guide rod of the drain valve core (11) penetrates through central guide holes of the drain valve spring (10) and the drain valve spring retainer ring (9), a spherical surface sealing surface of the drain valve core (11) faces a conical sealing surface of the drain valve seat (12), and the drain valve core (11) can move along the direction of the drain holes under the action of the guide rod, so that the opening degree between the spherical surface of the drain valve core (11) and the conical surface of the drain valve seat (12) is changed.

2. The novel flow distribution mechanism of the axial plunger pump valve as claimed in claim 1, wherein the liquid inlet valve seat (5) is a cylindrical structure, the outer cylindrical surface is provided with external threads and is connected with the liquid inlet hole of the cylinder body (1) through threads, the center of the liquid inlet valve seat (5) is provided with a hexagonal liquid through hole, and the bottom end of the liquid inlet valve seat (5) is provided with a conical surface.

3. The novel axial plunger pump valve distribution mechanism of claim 1, characterized in that the inlet valve spring retainer ring (2) is an elastic structure, is tightly clamped and installed in the inlet hole of the cylinder body (1), and is centrally provided with a central hole for limiting the relative positions of the inlet valve spring (3) and the inlet valve core (4).

4. The valve distribution mechanism of a novel axial plunger pump according to claim 2, characterized in that the valve core (4) of the liquid inlet valve is a solid of revolution, one side is a spherical surface, through which the conical surface at the bottom end of the valve seat (5) of the liquid inlet valve is connected to realize sealing, and the other side is a cylindrical guide mechanism, which extends into the central hole of the spring retainer (2) of the liquid inlet valve through the spring (3) of the liquid inlet valve.

5. The novel valve distribution mechanism of the axial plunger pump according to claim 1, characterized in that the valve seat (12) of the liquid discharge valve is the same as the valve seat (5) of the liquid inlet valve but different in corresponding size, and is a cylindrical structure, the outer cylindrical surface is provided with external threads and is connected with the liquid discharge hole of the distribution shaft (8) through threads, the center of the valve seat (12) of the liquid discharge valve is provided with an inner hexagonal liquid through hole, and the bottom end of the valve seat (12) of the liquid discharge valve is provided with a conical surface.

6. The novel axial plunger pump valve distribution mechanism of claim 1, characterized in that the discharge valve spring retainer ring (9) is the same shape as the inlet valve spring retainer ring (2) but different in size, the discharge valve spring retainer ring (9) is an elastic structure and is tightly clamped and installed in the discharge hole of the distribution shaft (8), and a central hole is formed in the center of the discharge valve spring retainer ring for limiting the relative positions of the discharge valve spring (10) and the discharge valve core (11); the central line of the liquid discharge hole is parallel to the radial direction of the port shaft.

7. A new axial piston pump valve distribution mechanism as claimed in claim 5, characterized by that, the valve core (11) of the discharge valve is a revolution body, one side is a spherical surface, through which it connects with the conical surface at the bottom of the valve seat (12) of the discharge valve to realize sealing, and the other side is a cylindrical guide mechanism, which extends into the central hole of the spring retainer (9) of the discharge valve through the spring (10) of the discharge valve.

8. The novel axial plunger pump valve flow distribution mechanism is characterized by further comprising a first O-shaped sealing ring (7) and a second O-shaped sealing ring (13), wherein the first O-shaped sealing ring (7) is installed at the matching surface of the flow distribution shaft (8) and the cylinder body rear end cover (6), and the second O-shaped sealing ring (13) is installed at the matching surface of the cylinder body (1) and the cylinder body rear end cover (6) to ensure the sealing performance of the device.

9. The novel axial plunger pump valve flow distribution mechanism is characterized in that the liquid inlet valve component is opened and closed by moving the valve core (4) of the liquid inlet valve up and down, so that the liquid suction action of the plunger pump is realized; the liquid discharge valve component is opened and closed by the left and right movement of the valve core (11) of the liquid discharge valve, so that the liquid discharge action of the plunger pump is realized.

10. A novel flow distribution method for an axial plunger pump valve is characterized by comprising the following steps:

under the spring force action of a liquid inlet valve spring (3) and a liquid outlet valve spring (10), a liquid inlet valve core (4) compresses a liquid inlet valve seat (5), a liquid outlet valve core (11) compresses a liquid outlet valve seat (12), and a liquid inlet valve component and a liquid outlet valve component are in a closed state;

when a plunger in a plunger hole of a cylinder body (1) moves downwards, the volume of a closed containing cavity of the plunger hole of the cylinder body is increased, so that negative pressure is formed, a valve core (4) of a liquid inlet valve moves under the action of pressure difference between the upper surface and the lower surface and overcomes the spring force of a liquid inlet valve spring (3), a liquid inlet valve assembly is opened, a valve core (11) of a liquid discharge valve is tightly pressed on a seat of a liquid discharge valve (12) under the combined action of the pressure difference between the two sides and a liquid discharge valve spring (10), the liquid discharge valve assembly is closed, and external liquid enters the plunger hole of the cylinder body (1) through a liquid inlet, so that;

when a plunger in a plunger hole of a cylinder body (1) moves upwards, the volume of a closed containing cavity of the cylinder body hole is reduced, and then fluid in the cylinder body hole is compressed, a valve core (11) of a liquid discharge valve overcomes the spring force of a spring (10) of the liquid discharge valve under the action of pressure difference of two sides to move, a liquid discharge valve component is opened, a valve core of a liquid inlet valve is pressed on a valve seat (5) of the liquid inlet valve under the combined action of the pressure difference of the two sides and a spring (3) of the liquid inlet valve, the liquid inlet valve component is closed, and the compressed fluid in the plunger hole on the cylinder body is discharged out of a plunger pump through a liquid discharge port.

Technical Field

The invention belongs to the technical field of plunger pumps, and particularly relates to a novel valve flow distribution mechanism and a valve flow distribution method for an axial plunger pump.

Background

The axial plunger pump has the advantages of high working parameters, convenient variable control, compact structure and the like, and is more and more widely applied to the fields of petrochemical industry, engineering machinery, aerospace and the like. The sealing performance of the valve is superior to that of a valve plate, the valve plate has good adaptability to media with low viscosity and poor lubricating performance (such as water, high water-based media and the like), and in addition, the valve flow distribution mechanism has good pollution resistance, so the valve flow distribution mechanism is widely applied to ultrahigh pressure and water hydraulic plunger pumps. The flow distribution mechanism is used as a core structure of the axial plunger pump, the phenomenon of abrasion between a traditional flow distribution plate and a cylinder body is avoided, and the design of the valve flow distribution mechanism has important significance for improving the performance index of the axial plunger pump. Due to the fact that the inner space of the plunger pump shell is limited, the traditional valve flow distribution structure has the problems of complex machining process, high installation, debugging and assembly difficulty, bad local structure stress condition and the like, and the reliability and the service life of the axial plunger pump valve flow distribution mechanism are greatly affected.

Disclosure of Invention

The invention provides a novel valve flow distribution mechanism and a flow distribution method of an axial plunger pump, aiming at overcoming the defects of the traditional valve flow distribution structure.

The purpose of the invention is realized by the following technical scheme: a novel axial plunger pump valve flow distribution mechanism comprises a cylinder body, a liquid inlet valve component, a cylinder body rear end cover, a flow distribution shaft and a liquid discharge valve component;

the cylinder body is respectively connected with the cylinder body rear end cover and the plunger pump front shell through an upper end face and a lower end face, and the center of the cylinder body is a cylindrical center hole for mounting a flow distribution shaft; the plunger holes are uniformly distributed on the cylinder body along the circumference, the circle center of the circumference is the center of the cylinder body, and the upper part of the cylinder body is a cylinder body cavity used for introducing fluid outside the pump into the cylinder body;

the liquid inlet valve assembly comprises a liquid inlet valve spring retainer ring, a liquid inlet valve spring, a liquid inlet valve core and a liquid inlet valve seat, the liquid inlet valve assembly is arranged in a liquid suction hole of the cylinder body, one side of the liquid inlet valve seat is provided with a conical sealing surface, the conical sealing surface is arranged at a liquid suction port of a plunger hole of the cylinder body, and the conical sealing surface faces the plunger hole of the cylinder body; one side of the valve core of the liquid inlet valve is a spherical sealing surface, and the other side of the valve core of the liquid inlet valve is a guide rod; the middle of the liquid inlet valve spring retainer ring is provided with a central guide hole, and the liquid inlet valve spring retainer ring is arranged in a plunger hole of the cylinder body; the liquid inlet valve spool and the liquid inlet valve spring are arranged between the liquid inlet valve spring retainer ring and the liquid inlet valve seat, one end of the liquid inlet valve spring is pressed on the liquid inlet valve spring retainer ring, the other end of the liquid inlet valve spring is pressed on the liquid inlet valve spool, a guide rod of the liquid inlet valve spool penetrates through central guide holes of the liquid inlet valve spring and the liquid inlet valve spring retainer ring, a spherical sealing surface of the liquid inlet valve spool faces a conical sealing surface of the liquid inlet valve seat, the liquid inlet valve spool can move along the direction of a plunger hole of a cylinder body under the action of the guide rod, and then the opening degree between the spherical surface of the liquid; the liquid inlet valve component and the cylinder cavity at the upper part of the cylinder body complete the liquid suction action of the plunger pump together;

the flow distribution shaft is integrally a rotary part, ten liquid discharge holes are uniformly distributed on the periphery of the flow distribution shaft, the ten liquid discharge holes correspond to ten cylinder plunger holes in the cylinder body one by one, and a liquid outlet hole is formed in the center of the flow distribution shaft and is used for discharging fluid flowing through the liquid discharge valve assembly out of the plunger pump through the liquid outlet; the valve shaft is fixedly connected with the rear end cover of the cylinder body;

the drain valve assembly comprises a drain valve spring retainer ring, a drain valve spring, a drain valve core and a drain valve seat; one side of the liquid discharge valve seat is provided with a conical sealing surface which is arranged in a liquid discharge hole of the valve spindle, and the conical sealing surface faces the valve spindle; one side of the valve core of the liquid discharge valve is a spherical sealing surface, and the other side of the valve core of the liquid discharge valve is a guide rod; the middle of the liquid discharge valve spring retainer ring is provided with a central guide hole, and the liquid discharge valve spring retainer ring is arranged in a liquid discharge hole of the valve shaft; the valve core and the spring of the drain valve are arranged between the spring retainer ring of the drain valve and the valve seat of the drain valve, one end of the spring of the drain valve is pressed on the spring retainer ring of the drain valve, the other end of the spring of the drain valve is pressed on the valve core of the drain valve, the guide rod of the valve core of the drain valve penetrates through the central guide holes of the spring retainer ring of the drain valve and the spring retainer ring of the drain valve, the spherical sealing surface of the valve core of the drain valve faces the conical sealing surface of the valve seat of the drain valve, and the valve core of the drain valve can move along the direction of the drain hole under the action.

Furthermore, the feed liquor valve disk seat is a cylindrical structure, and it has the external screw thread to open on the outer face of cylinder, through screw thread and cylinder body feed liquor jogged joint, and open at feed liquor valve disk seat center has the soket head cap to lead to the liquid hole, and feed liquor valve disk seat bottom processing has conical surface.

Furthermore, the liquid inlet valve spring retainer ring is of an elastic structure, is tightly clamped and installed in a liquid inlet hole of the cylinder body, and is provided with a central hole in the center for limiting the relative positions of the liquid inlet valve spring and the liquid inlet valve core.

Furthermore, the valve core of the liquid inlet valve is a revolving body, one side of the valve core is a spherical surface, the valve core is connected with the conical surface at the bottom end of the valve seat of the liquid inlet valve through the spherical surface to realize sealing, and the other side of the valve core is a cylindrical guide mechanism and extends into the central hole of the spring retainer ring of the liquid inlet valve through the spring of the liquid inlet valve.

Furthermore, the valve seat of the liquid discharge valve is the same as the valve seat of the liquid inlet valve in shape, but different in corresponding size, and is of a cylindrical structure, the outer cylindrical surface is provided with external threads and is connected with the liquid discharge hole of the flow distribution shaft through threads, the center of the valve seat of the liquid discharge valve is provided with an inner hexagonal liquid through hole, and the bottom end of the valve seat of the liquid discharge valve is processed with a conical surface.

Furthermore, the shape of the drain valve spring retainer ring is the same as that of the liquid inlet valve spring retainer ring, but the size of the drain valve spring retainer ring is different, the drain valve spring retainer ring is of an elastic structure and is tightly clamped and installed in a drain hole of the valve shaft, and a central hole is formed in the center of the drain valve spring retainer ring and used for limiting the relative position of a drain valve spring and a drain valve core; the central line of the liquid discharge hole is parallel to the radial direction of the port shaft.

Furthermore, the valve core of the liquid discharge valve is a revolving body, one side of the valve core is a spherical surface, the valve core is connected with the conical surface at the bottom end of the valve seat of the liquid discharge valve through the spherical surface to realize sealing, and the other side of the valve core is a cylindrical guide mechanism and extends into the central hole of the spring retainer ring of the liquid discharge valve through the spring of the liquid discharge valve.

Furthermore, the mechanism further comprises a first O-shaped sealing ring and a second O-shaped sealing ring, the first O-shaped sealing ring is arranged at the matching surface of the valve shaft and the rear end cover of the cylinder body, and the second O-shaped sealing ring is arranged at the matching surface of the cylinder body and the rear end cover of the cylinder body, so that the sealing performance of the device is ensured.

Furthermore, the liquid inlet valve component is opened and closed by moving the valve core of the liquid inlet valve up and down, so that the liquid suction action of the plunger pump is realized; the liquid discharge valve component is opened and closed by moving the valve core of the liquid discharge valve leftwards and rightwards, and then the liquid discharge action of the plunger pump is realized.

A novel flow distribution method for an axial plunger pump valve comprises the following steps:

under the spring force action of a liquid inlet valve spring and a liquid outlet valve spring, a valve core of the liquid inlet valve presses a valve seat of the liquid inlet valve, a valve core of the liquid outlet valve presses a valve seat of the liquid outlet valve, and a liquid inlet valve component and a liquid outlet valve component are in a closed state;

when a plunger in a plunger hole of the cylinder body moves downwards, the volume of a closed containing cavity of the plunger hole of the cylinder body is increased, so that negative pressure is formed, a valve core of a liquid inlet valve moves under the action of upper and lower pressure differences and overcomes the spring force of a spring of the liquid inlet valve, a liquid inlet valve assembly is opened, a valve core of a liquid discharge valve is tightly pressed on a valve seat of the liquid discharge valve under the combined action of the pressure differences at two sides and the spring of the liquid discharge valve, the liquid discharge valve assembly is closed, and external liquid enters the plunger hole of the cylinder body through a liquid inlet;

when the plunger in the plunger hole of the cylinder body moves upwards, the volume of the closed containing cavity in the cylinder body hole is reduced, and then fluid in the cylinder body hole is compressed, the valve core of the liquid discharge valve moves under the action of pressure difference at two sides and overcomes the spring force of the spring of the liquid discharge valve, the liquid discharge valve assembly is opened, the valve core of the liquid inlet valve is pressed on the valve seat of the liquid inlet valve under the combined action of the pressure difference at two sides and the spring of the liquid inlet valve, the liquid inlet valve assembly is closed, and the fluid compressed in the plunger hole on the cylinder body is discharged out of the plunger pump through the liquid discharge port, so that.

The invention has the beneficial effects that: the invention realizes the installation of the liquid inlet valve and the liquid outlet valve through the valve shaft and the cylinder body; the linear motion and the stroke limitation of the liquid distribution valve core are realized through a liquid inlet valve spring retainer ring and a liquid outlet valve spring retainer ring; the stable flow distribution of the axial plunger pump is realized by opening and closing the liquid inlet valve and the liquid outlet valve;

the method specifically comprises the following steps:

1. the installation of a liquid inlet valve and a liquid outlet valve is realized through the flow distribution shaft and the cylinder body, so that the whole flow distribution mechanism is more compact;

2. the flow distribution valve assembly is connected with the cylinder body hole and the flow distribution shaft hole through threads, so that the installation is convenient, the maintenance and the replacement are easy, and the structure is compact;

3. through the high-response flow distribution valve assembly, the plunger pump is easy to obtain ultrahigh pressure, and meanwhile, the anti-pollution capacity and the adaptability to a medium with low viscosity and poor lubricating property of the plunger pump are improved;

drawings

FIG. 1 is a cross-sectional view of a valve dispensing mechanism for a plunger pump;

FIG. 2 is a schematic illustration of the installation of the inlet valve assembly;

FIG. 3 is a schematic view of a drain valve assembly installation;

FIG. 4 is a plan view of the valve seat (5) of the liquid inlet valve;

FIG. 5 is a schematic view of a spring retainer ring (2) of the liquid inlet valve;

in the figure, 1-cylinder, 2-liquid inlet valve spring retainer ring, 3-liquid inlet valve spring, 4-liquid inlet valve core, 5-liquid inlet valve seat, 6-cylinder rear end cover, 7-first O-shaped sealing ring, 8-flow distributing shaft, 9-liquid discharge valve spring retainer ring, 10-liquid discharge valve spring, 11-liquid discharge valve core, 12-liquid discharge valve seat and 13-second O-shaped sealing ring.

Detailed Description

Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in the cross-sectional view of the valve flow distribution mechanism of the plunger pump shown in fig. 1, a cylinder body 1 is of a square symmetrical structure and is respectively connected with a cylinder body rear end cover 6 and a plunger pump front shell through an upper end face and a lower end face, the center of the cylinder body 1 is a cylindrical center hole for installing a flow distribution shaft 8, ten cylinder body holes are uniformly distributed in the cylinder body 1 along the circumference, the circle center of the circumference is the center of the cylinder body, and the cylinder body holes are used for installing and fixing a liquid inlet valve component. In addition, the upper part of the cylinder body 1 is a cylinder body cavity which is used for leading fluid outside the pump into the cylinder body 1 and completing the liquid suction action of the plunger pump together with the liquid inlet valve component; the installation of a liquid inlet valve and a liquid outlet valve is realized through the flow distribution shaft and the cylinder body, so that the whole flow distribution mechanism is more compact.

As shown in the cross-sectional view of the valve flow distribution mechanism of the plunger pump shown in fig. 1, the flow distribution shaft 8 is fixedly connected with the rear end cover 6 of the cylinder body through bolts, the whole flow distribution shaft 8 is a rotary part, ten uniformly distributed liquid discharge holes are formed on the periphery of the rotary part and correspond to the ten cylinder body holes in the cylinder body 1 one by one, the liquid discharge holes in the flow distribution shaft 8 are used for installing and fixing the liquid discharge valve assembly, in addition, the center of the flow distribution shaft 8 is provided with a liquid outlet hole, and high-pressure fluid flowing through the liquid discharge valve assembly can be discharged out of the pump through the.

As shown in fig. 2, the liquid inlet valve assembly is installed in a liquid inlet hole of the cylinder 1, and includes a liquid inlet valve spring retainer ring 2, a liquid inlet valve spring 3, a liquid inlet valve core 4, and a liquid inlet valve seat 5.

As shown in fig. 2 and 4, the liquid inlet valve seat 5 is a cylindrical structure, an external thread is arranged on the outer cylindrical surface, the liquid inlet valve seat is connected with the liquid inlet hole of the cylinder body 1 through a thread, the center of the liquid inlet valve seat 5 is provided with a hexagon socket through hole, and the bottom end of the liquid inlet valve seat 5 is processed with a conical surface.

As shown in fig. 5, the liquid inlet valve spring retainer 2 is an elastic structure, and is tightly clamped and installed in a liquid inlet hole of the cylinder body 1, a central hole is formed in the center of the liquid inlet valve spring retainer, the periphery of the spring retainer is oval and provided with a notch, two holes are respectively formed in two sides of the notch, and the size of the periphery of the spring retainer can be changed by forcibly clamping the two holes, so that the liquid inlet valve spring 3 and the liquid inlet valve core 4 are limited in relative positions. The valve core 4 of the liquid inlet valve is a revolving body, one side of the valve core is a spherical surface, the spherical surface is connected with the conical surface at the bottom end of the valve seat 5 of the liquid inlet valve to realize sealing, and the cylindrical guide mechanism at the other side extends into the central hole of the spring retainer ring 4 of the liquid inlet valve through the spring 3 of the liquid inlet valve.

As shown in fig. 3, the installation of the drain valve assembly, which includes a drain valve spring retainer ring 9, a drain valve spring 10, a drain valve core 11, and a drain valve seat 12, is installed in the drain hole of the port shaft 8.

The drain valve disk seat 12 is similar to the structure of the liquid inlet valve disk seat 5, but has different corresponding sizes, and is of a cylindrical structure, an external thread is arranged on the outer cylindrical surface and is connected with the liquid discharge hole of the flow distribution shaft 8 through a thread, an inner hexagonal liquid through hole is arranged in the center of the drain valve disk seat 12, and a conical surface is processed at the bottom end of the drain valve disk seat 12.

The structure of the liquid discharge valve spring retainer ring 9 is similar to that of the liquid inlet valve spring retainer ring 2, but the size of the liquid discharge valve spring retainer ring is different, the liquid discharge valve spring retainer ring 9 is of an elastic structure, the elastic structure is tightly clamped and installed in a flow distribution shaft hole, and a central hole is formed in the center of the elastic structure and used for limiting the relative positions of a liquid discharge valve spring 10 and a liquid discharge valve core 11. The valve core 11 of the liquid discharge valve is a rotary body, one side of the valve core is a spherical surface, the spherical surface is connected with the conical surface at the bottom end of the valve seat 12 of the liquid discharge valve to realize sealing, and the cylindrical guide mechanism at the other side extends into the central hole of the spring retainer ring 9 of the liquid discharge valve through the spring 10 of the liquid discharge valve.

The first O-shaped sealing ring 7 is arranged on the matching surface of the valve shaft 8 and the cylinder body rear end cover 6, and the second O-shaped sealing ring 13 is arranged on the matching surface of the cylinder body 1 and the cylinder body rear end cover 6, so that the sealing performance of the device is ensured.

According to the invention, the liquid inlet valve assembly is opened and closed by moving the liquid inlet valve core 4 up and down, so that the liquid suction action of the plunger pump is realized. The liquid discharge valve component is opened and closed by the left and right movement of the liquid discharge valve core 11, and further the liquid discharge action of the plunger pump is realized.

The invention also provides a novel flow distribution method of the axial plunger pump valve, which comprises the following steps:

under the spring force action of the liquid inlet valve spring 3 and the liquid outlet valve spring 10, the liquid inlet valve core 4 presses the liquid inlet valve seat 5, the liquid outlet valve core 11 presses the liquid outlet valve seat 12, and the liquid inlet valve component and the liquid outlet valve component are in a closed state;

when a plunger in a plunger hole of a cylinder body 1 moves downwards, the volume of a closed containing cavity of the plunger hole of the cylinder body is increased, so that negative pressure is formed, a valve core 4 of a liquid inlet valve moves under the action of pressure difference between the upper surface and the lower surface and overcomes the spring force of a spring 3 of the liquid inlet valve, a valve component of the liquid inlet valve is opened, a valve core 11 of a liquid discharge valve is tightly pressed on a seat of a liquid discharge valve 12 under the combined action of the pressure difference between the two sides and a spring 10 of the liquid discharge valve, the valve component of the liquid discharge valve is closed, and external liquid enters the plunger hole;

when a plunger in a plunger hole of the cylinder body 1 moves upwards, the volume of a closed containing cavity of the cylinder body hole is reduced, and then fluid in the cylinder body hole is compressed, a valve core 11 of a liquid discharge valve moves under the action of pressure difference at two sides and overcomes the spring force of a spring 10 of the liquid discharge valve, a liquid discharge valve component is opened, a valve core of the liquid feed valve is pressed on a valve seat 5 of the liquid feed valve under the combined action of the pressure difference at two sides and a spring 3 of the liquid feed valve, the liquid feed valve component is closed, and high-pressure fluid compressed in the plunger hole on the cylinder body is discharged out of the plunger pump through a liquid discharge port.

According to the invention, the plunger pump is easy to obtain ultrahigh pressure through the high-response flow distribution valve assembly, and meanwhile, the anti-pollution capability and the adaptability to a medium with low viscosity and poor lubricating property of the plunger pump are improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.