Shunt, hydraulic end and plunger pump

Abstract

Provided is a diverter, a hydraulic end, and a piston pump. The diverter includes: a body, which is cylindrical, and the body includes a first end, a second end, and a side surface connecting the first end and the second end; a first opening, which is located on the side surface of the body; a first cavity, which is located at the first end; a first channel, which is respectively communicated with the first opening and the first cavity, and the first channel extends from the first opening to the first cavity and is configured to circulate fluid; a second opening, which is located on the side surface of the body; a second cavity, which is located at the second end; and a second channel, which is respectively communicated with the second opening and the second cavity, and the second channel extends from the second opening to the second cavity and is configured to circulate fluid. This diverter is conducive to obtaining a first opening and a second opening with larger apertures, and is also conducive to obtaining a first opening and a second opening with equal or substantially equal sizes.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to a diverter, a hydraulic end, and a piston pump. Background Art

[0002] Currently, in the process of oil and gas field exploitation, fracturing construction is the main production-increasing method, and the piston pump is the main equipment for pumping fracturing media during the production-increasing operation. In other words, in the entire process of oil and gas exploitation, for any process that requires transporting media into the well under a specific pressure, it needs to be achieved through a piston pump. Summary of the Invention

[0003] At least one embodiment of the present disclosure relates to a diverter, a hydraulic end, and a piston pump.

[0004] At least one embodiment of the present disclosure provides a diverter, including: a body, the body being cylindrical, the body including a first end, a second end, and a side surface connecting the first end and the second end; a first opening located on the side surface of the body; a first cavity located at the first end; a first channel respectively communicating with the first opening and the first cavity, the first channel extending from the first opening to the first cavity and being configured to circulate fluid; a second opening located on the side surface of the body; a second cavity located at the second end; and a second channel respectively communicating with the second opening and the second cavity, the second channel extending from the second opening to the second cavity and being configured to circulate fluid.

[0005] For example, in some embodiments of the present disclosure, the first opening is closer to the second end than the second opening, and the second opening is closer to the first end than the first opening.

[0006] For example, in some embodiments of the present disclosure, the first opening and the second opening are located at different positions in the axial direction of the body.

[0007] For example, in some embodiments of the present disclosure, the first opening and the second opening have different orientations, and the size of the first opening is the same as the size of the second opening.

[0008] For example, in some embodiments of the present disclosure, the first channel and the second channel are not connected, and the first cavity and the second cavity are not connected.

[0009] For example, in some embodiments of the present disclosure, the body includes a first guiding portion, the first channels are provided in plurality, the first guiding portion separates the plurality of first channels, and the plurality of first channels converge at the first cavity.

[0010] For example, in some embodiments of the present disclosure, a plurality of the first openings are provided, and the plurality of first channels correspond to the plurality of first openings one by one. The plurality of first openings are distributed in the circumferential direction of the body, and the plurality of first openings are located at the same position in the axial direction of the body.

[0011] For example, in some embodiments of the present disclosure, the body includes a second flow guiding portion. A plurality of the second channels are provided, and the second flow guiding portion separates the plurality of second channels. The plurality of second channels converge at the second concave cavity.

[0012] For example, in some embodiments of the present disclosure, a plurality of the second openings are provided, and the plurality of second channels correspond to the plurality of second openings one by one. The plurality of second openings are distributed in the circumferential direction of the body; the plurality of second openings are located at the same position in the axial direction of the body.

[0013] For example, in some embodiments of the present disclosure, the first concave cavity includes a first step surface. The first step surface divides the first concave cavity into two first sub-cavities with different cross-sectional areas in the radial direction. The second concave cavity includes a second step surface. The second step surface divides the second concave cavity into two second sub-cavities with different cross-sectional areas in the radial direction.

[0014] At least one embodiment of the present disclosure further provides a hydraulic end, including: a valve box, the valve box including an inner cavity; any one of the above-mentioned flow dividers, the flow divider being located in the inner cavity.

[0015] For example, in some embodiments of the present disclosure, the inner cavity includes an alternating cavity, a low-pressure cavity, and a high-pressure cavity. The alternating cavity, the low-pressure cavity, and the high-pressure cavity are sequentially arranged along the axial direction of the valve box. The second end is located in the high-pressure cavity, the first opening is located in the low-pressure cavity, the first end and the second opening are located in the alternating cavity. The second opening communicates with the alternating cavity. The valve box includes a liquid inlet hole and a liquid discharge hole. The liquid inlet hole communicates with the first opening, and the liquid discharge hole communicates with the high-pressure cavity.

[0016] For example, in some embodiments of the present disclosure, the hydraulic end further includes a plunger. The inner cavity further includes a plunger cavity, and the plunger cavity is configured to accommodate the plunger. The plunger cavity, the alternating cavity, the low-pressure cavity, and the high-pressure cavity are sequentially arranged along the axial direction of the valve box.

[0017] For example, in some embodiments of the present disclosure, a part of the alternating cavity is provided between the first end of the flow divider and the valve box.

[0018] For example, in some embodiments of the present disclosure, the hydraulic end further includes a first valve assembly and a first guiding portion. The first valve assembly is located in the alternating cavity. The first valve assembly is configured to be opened to communicate the low-pressure cavity and the alternating cavity or to be closed to separate the low-pressure cavity and the alternating cavity. The first valve assembly includes a first valve body, a first seal, and a first valve seat. The first valve seat is annular and includes a first intermediate hole configured to allow fluid to flow through. The first valve body includes a first main body portion, a first guide rod, and a second guide rod disposed on both sides of the first main body portion. A part of the first seal is embedded in a first groove of the first main body portion. The first valve seat and the first guiding portion are located in the first concave cavity, and the first valve body does not contact the valve box.

[0019] For example, in some embodiments of the present disclosure, the hydraulic end further includes a first spring and a spring seat. The first spring is located between the spring seat and the first main body portion. The first guiding portion includes a first guiding seat and a first guiding sleeve connected to the first guiding seat. The first guiding seat includes a first through hole configured to allow fluid to flow through. The first guiding sleeve is configured to accommodate a part of the first guide rod to guide the first valve body. The spring seat has a second guiding sleeve configured to accommodate a part of the second guide rod to guide the first valve body.

[0020] For example, in some embodiments of the present disclosure, the spring seat has an annular groove configured to place the first spring and a hollow structure configured to allow fluid to flow through.

[0021] For example, in some embodiments of the present disclosure, the hydraulic end further includes a second valve assembly and a second guiding portion. The second valve assembly is located in the high-pressure chamber and is configured to be opened to communicate the alternating chamber and the high-pressure chamber or to be closed to separate the alternating chamber and the high-pressure chamber. The second valve assembly includes a second valve body, a second seal, and a second valve seat. The second valve seat is annular and includes a second intermediate hole configured to allow fluid to flow through. The second valve body includes a second main body portion, a third guide rod, and a fourth guide rod disposed on both sides of the second main body portion. A part of the second seal is embedded in a second groove of the second main body portion. The hydraulic end further includes a second spring and a gland. The second spring is located between the gland and the second main body portion. The second guiding portion includes a second guiding seat and a third guiding sleeve connected to the second guiding seat. The second guiding seat includes a second through hole configured to allow fluid to flow through. The third guiding sleeve is configured to accommodate a part of the third guide rod to guide the second valve body. The gland has a fourth guiding sleeve configured to accommodate a part of the fourth guide rod to guide the second valve body.

[0022] For example, in some embodiments of the present disclosure, a bleed hole is provided on the second guiding sleeve, and the bleed hole is configured to allow fluid to flow through.

[0023] At least one embodiment of the present disclosure further provides a plunger pump including any of the above-mentioned hydraulic ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description only relate to some embodiments of the present disclosure and do not limit the present disclosure.

[0025] Figure 1A It is a cross-sectional view of a plunger pump.

[0026] Figure 1B It is Figure 1A a schematic diagram of the hydraulic end in the shown plunger pump.

[0027] Figure 1C It is Figure 1B a schematic diagram of the valve box in the shown hydraulic end.

[0028] Figure 2A It is a perspective view of a diverter provided by an embodiment of the present disclosure.

[0029] Figure 2B It is a cross-sectional view of a diverter provided by an embodiment of the present disclosure (the cross-section is a vertical plane passing through the axis of the body).

[0030] Figure 2C A perspective view of a diverter provided for an embodiment of the present disclosure ( Figure 2A top perspective view).

[0031] Figure 2D A left view of a diverter provided for an embodiment of the present disclosure.

[0032] Figure 2E A left perspective view of a diverter provided for an embodiment of the present disclosure.

[0033] Figure 3A A perspective view of a diverter from another perspective provided for an embodiment of the present disclosure.

[0034] Figure 3B A cross-sectional view of a diverter provided for an embodiment of the present disclosure (the cross-section is a horizontal plane passing through the axis of the body).

[0035] Figure 3C A perspective view of a diverter provided for an embodiment of the present disclosure ( Figure 3A top perspective view).

[0036] Figure 3D A right view of a diverter provided for an embodiment of the present disclosure.

[0037] Figure 3E A right perspective view of a diverter provided for an embodiment of the present disclosure.

[0038] Figure 4 is Figure 2A or Figure 3A A schematic diagram of a cross-section of the diverter shown in a plane perpendicular to the axis of the body.

[0039] Figure 5 A front view structural diagram of a hydraulic end provided for at least one embodiment of the present disclosure.

[0040] Figure 6 A top view structural diagram of a hydraulic end provided for at least one embodiment of the present disclosure.

[0041] Figure 7 A structural diagram of the valve box of the hydraulic end provided for at least one embodiment of the present disclosure.

[0042] Figure 8 A sectional view of the valve box of the hydraulic end provided for at least one embodiment of the present disclosure.

[0043] Figure 9A An assembly diagram of the first guiding part and the first guiding auxiliary part in the hydraulic end provided for at least one embodiment of the present disclosure.

[0044] Figure 9BPerspective three-dimensional view of the first guiding portion and the first guiding auxiliary member in the hydraulic end provided by at least one embodiment of the present disclosure.

[0045] Figure 10 Perspective three-dimensional view of the first valve seat in the hydraulic end provided by at least one embodiment of the present disclosure.

[0046] Figure 11A Exploded view of the first valve body and the first seal in the hydraulic end provided by at least one embodiment of the present disclosure.

[0047] Figure 11B Perspective three-dimensional view of the first valve body and the first seal in the hydraulic end provided by at least one embodiment of the present disclosure.

[0048] Figure 11C Perspective three-dimensional view of the first valve body and the first seal in the hydraulic end provided by at least one embodiment of the present disclosure from another perspective.

[0049] Figure 12 Perspective three-dimensional view of the spring seat in the hydraulic end provided by at least one embodiment of the present disclosure.

[0050] Figure 13A Assembly view of the second guiding portion and the third guiding auxiliary member in the hydraulic end provided by at least one embodiment of the present disclosure.

[0051] Figure 13B Perspective three-dimensional view of the second guiding portion and the third guiding auxiliary member in the hydraulic end provided by at least one embodiment of the present disclosure.

[0052] Figure 14 Perspective three-dimensional view of the second valve seat in the hydraulic end provided by at least one embodiment of the present disclosure.

[0053] Figure 15A Exploded view of the second valve body and the second seal in the hydraulic end provided by at least one embodiment of the present disclosure.

[0054] Figure 15B Perspective three-dimensional view of the second valve body and the second seal in the hydraulic end provided by at least one embodiment of the present disclosure.

[0055] Figure 15C Perspective three-dimensional view of the second valve body and the second seal in the hydraulic end provided by at least one embodiment of the present disclosure from another perspective.

[0056] Figure 16 Perspective three-dimensional view of the gland in the hydraulic end provided by at least one embodiment of the present disclosure.

[0057] Figure 17 Partial schematic view of the diverter, the first valve assembly, the first valve seat, and the first guiding portion in the hydraulic end provided by at least one embodiment of the present disclosure.

[0058] Figure 18 Schematic diagram of a plunger pump provided by at least one embodiment of the present disclosure. Specific embodiments

[0059] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Apparently, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0060] For example, a plunger pump includes a power end and a hydraulic end. The power end is responsible for transferring the energy of the prime mover to the hydraulic end. The power end mainly includes a housing, a crankshaft, a connecting rod, a crosshead, and a pull rod; the hydraulic end is responsible for converting the mechanical energy from the power end into the pressure energy of the liquid.

[0061] For example, the hydraulic end is an important component installed at the front end of the plunger pump. It converts low-pressure liquid into high-pressure liquid through the reciprocating motion of the plunger and the control of the valve body. The high-pressure liquid accumulates in the manifold and is pumped into the well. For example, a plunger pump with a hydraulic end can be applied to oil and gas field fracturing / casing equipment, but is not limited thereto.

[0062] Figure 1A Cross-sectional view of a plunger pump. Figure 1B For Figure 1A Schematic diagram of the hydraulic end in the shown plunger pump. Figure 1C For Figure 1B Schematic diagram of the valve box in the shown hydraulic end. As Figure 1A shown, the plunger pump 003 includes a power end 002 and a hydraulic end 001. As Figure 1A and Figure 1B shown, the hydraulic end 001 mainly includes a valve box 01, a plunger 02, a valve assembly 03, a valve assembly 04, a sealing assembly, a gland 05, and a gland nut 06. Figure 1A Also shown are a clamp 07, a pull rod 08, a crosshead 09, a connecting rod 010, a housing 011, and a crankshaft 012. As Figure 1B shown, the hydraulic end 001 further includes a valve seat 021, a spring 022, a suction gland 023, a suction gland nut 024, a spring 025, a drain hole 026, a sealing packing 027, and a packing gland 028. Figure 1C Shows the cruciform structure of the valve box 01.

[0063] Generally, the working principle of a piston pump is as follows: Driven by a prime mover, the crankshaft 012 of the power end 002 rotates, driving the connecting rod 010 and the crosshead 09 to reciprocate horizontally. The crosshead 09 then drives the piston 02 to reciprocate horizontally in the valve chest 01 through the pull rod 08. When the piston 02 moves in the return stroke, the internal volume of the valve chest 01 gradually increases, forming a local vacuum. At this time, the valve assembly 03 opens and the valve assembly 04 closes, and the medium enters the inner cavity of the valve chest 01. When the piston 02 returns to the limit position, the inner cavity of the valve chest 01 is filled with the medium, and the liquid suction action is completed. When the piston 02 moves in the forward stroke, the internal volume of the valve chest 01 gradually decreases, the medium is squeezed, and the pressure increases. At this time, the valve assembly 04 opens and the valve assembly 03 closes. Under the action of pressure, the medium enters the drain hole 025. When the piston 02 reaches the limit position in the forward stroke, the medium accommodation space inside the valve chest 01 is the smallest, and the liquid discharge action ends. Due to the continuous reciprocating movement of the piston 02, the liquid suction and discharge processes alternate, and high-pressure medium is continuously output.

[0064] As Figures 1A to 1C shown, the valve chest of the hydraulic end is a cross-shaped intersecting structure. As Figure 1C shown, the inner cavity of the valve chest 02 is divided into a low-pressure area 01a, an alternating area 01b, and a high-pressure area 01c according to pressure. However, the intersection line is exactly in the alternating area 01b. Mechanical analysis shows that the stress concentration at the intersection line is obvious. Coupled with the action of alternating loads, fatigue cracks are likely to occur at the intersection line, resulting in cracking and water leakage of the valve chest 01. The valve chest is frequently replaced on site, and the replacement cost is relatively high, time-consuming and laborious.

[0065] Figures 2A to 2E and Figures 3A to 3E A diverter provided by an embodiment of the present disclosure. Figure 2A A perspective view of a diverter provided by an embodiment of the present disclosure. Figure 2B A cross-sectional view of a diverter provided by an embodiment of the present disclosure (the cross-section is a vertical plane passing through the axis of the body). Figure 2C A perspective view of a diverter provided by an embodiment of the present disclosure ( Figure 2A top perspective view). Figure 2D A left view of a diverter provided by an embodiment of the present disclosure. Figure 2E A left perspective view of a diverter provided by an embodiment of the present disclosure. Figure 3A Another perspective view of a diverter provided by an embodiment of the present disclosure. Figure 3B A cross-sectional view of a diverter provided by an embodiment of the present disclosure (the cross-section is a horizontal plane passing through the axis of the body). Figure 3C A perspective view of a diverter provided by an embodiment of the present disclosure ( Figure 3A top perspective view). Figure 3D A right view of a diverter provided by an embodiment of the present disclosure.Figure 3E A right perspective view of a diverter provided by an embodiment of the present disclosure.

[0066] As Figure 2A and Figure 3A shown, at least one embodiment of the present disclosure provides a diverter 1, which includes: a body 10, a first opening 11a, a first channel 11b, a first cavity 11c, a second opening 21a, a second channel 21b, and a second cavity 21c. Figure 2A and Figure 3A are views of different perspectives of the same diverter.

[0067] As Figure 2A and Figure 3A shown, in at least one embodiment of the present disclosure providing a diverter, the body 10 is cylindrical, and the body 10 includes a first end 1001, a second end 1002, and a side surface 1003 connecting the first end 1001 and the second end 1002. For example, the body 10 is cylindrical. The embodiments of the present disclosure are described by taking the body 10 as cylindrical as an example.

[0068] As Figure 2A shown, the first cavity 11c is located at the first end 1001; the second cavity 21c is located at the second end 1002. As Figure 2A shown, the first cavity 11c is an open cavity, and the first cavity 11c is recessed into the body 10 at the first end 1001. Figure 3A shown, the second cavity 21c is an open cavity, and the second cavity 21c is recessed into the body 10 at the second end 1002. That is to say, whether it is the first cavity or the second cavity, the cavity means recessing from the end of the body into the body to form a cavity.

[0069] As Figure 2A and Figure 3A shown, the first opening 11a is located on the side surface 1003 of the body 10; the second opening 21a is located on the side surface 1003 of the body 10.

[0070] As Figures 2A to 2C shown, the first channel 11b is respectively communicated with the first opening 11a and the first cavity 11c; the first channel 11b extends from the first opening 11a to the first cavity 11c and is configured to circulate fluid. The fluid is the medium mentioned above.

[0071] As Figures 3A to 3C shown, the second channel 21b is respectively communicated with the second opening 21a and the second cavity 21c; the second channel 21b extends from the second opening 21a to the second cavity 21c and is configured to circulate fluid.

[0072] ​​For example, a fluid is a flowable substance. For example, the fluid includes a fracturing fluid, and the fracturing fluid includes a proppant-carrying fluid. The proppant-carrying fluid includes water, sand, and additives. For example, the sand includes quartz sand. For example, the fluid also includes cement mortar. Generally, cement mortar is used in well cementing. The embodiments of the present disclosure do not limit the type and viscosity of the fluid. The diverter provided by the embodiments of the present disclosure can be applied to fracturing processes and well cementing processes, but is not limited thereto, and can also be applied to other fields that require liquid diversion.

[0073] For the diverter provided by at least one embodiment of the present disclosure, the first opening 11a is located on the side surface 1003 of the body 10; the second opening 21a is also located on the side surface 1003 of the body 10, which is beneficial to obtaining the first opening 11a and the second opening 21a with larger apertures, and is also beneficial to obtaining the first opening 11a and the second opening 21b with equal or substantially equal sizes. The large sizes of the first opening 11a and the second opening 21a, that is, the large apertures, are beneficial for the fluid to enter and exit the diverter and prevent blockage. The first opening 11a and the second opening 21a with equal or substantially equal sizes are beneficial for the balance of the fluid entering and exiting the diverter. That is, the amount of fluid entering the diverter and the amount of fluid exiting the diverter are substantially the same. For example, in the case where the diverter is applied to a piston pump, the amount of fluid entering the diverter during the piston return stroke and the amount of fluid exiting the diverter during the piston forward stroke are substantially the same.

[0074] For example, as Figure 2A and Figure 3A shown, to facilitate the arrangement of the first channel 11b and the second channel 21b, the first opening 11a is closer to the second end 1002 than the second opening 21a, and the second opening 21a is closer to the first end 1001 than the first opening 11a.

[0075] For example, as Figure 2B 、 Figure 2C 、 Figure 3B and Figure 3C shown, to facilitate the arrangement of the first opening 11a and the second opening 21a, the length of the first channel 11b in the axial direction of the body 10 is less than the length of the second channel 21b in the axial direction of the body 10. In the embodiments of the present disclosure, the axial direction of the body 10 is the extension direction of the central axis of the body. For example, the central axis of the body can be the rotation axis of a cylinder.

[0076] For example, as Figure 2B 、 Figure 2C 、 Figure 3B and Figure 3C shown, to facilitate the entry and exit of the fluid, the first opening 11a and the second opening 21a are located at different positions in the axial direction of the body 10.

[0077] For example, as Figure 2A andFigure 3A As shown, for facilitating the entry and discharge of fluid, the orientations of the first opening 11a and the second opening 21a are different. For facilitating the balance between the entry and discharge of fluid, the sizes of the first opening 11a and the second opening 21a are the same.

[0078] For example, as Figures 2A to 2C and Figures 3A to 3C shown, for facilitating the diversion of flow, the first channel 11b and the second channel 21b are not connected, and the first cavity 11c and the second cavity 21c are not connected.

[0079] For example, as Figures 2A to 2C shown, the body 10 includes a first flow guiding portion 101. The first channels 11b are provided in plurality, that is, the diverter includes a plurality of first channels 11b. The first flow guiding portion 101 separates the plurality of first channels 11b, and the plurality of first channels 11b converge at the first cavity 11c. The plurality of first channels 11b are all connected to the first cavity 11c. Figures 2A to 2C Two first channels 11b are shown, that is, one first channel 11b1 and another first channel 11b2. In other embodiments, the first channel 11b may also be one or more than two, and can be set as required.

[0080] For example, as Figures 2A to 2C shown, the first opening 11a is provided in plurality, that is, the diverter 1 includes a plurality of first openings 11a. The plurality of first channels 11b correspond to the plurality of first openings 11a one by one. The plurality of first openings 11a are distributed in the circumferential direction of the body 10, and the plurality of first openings 11a are located at the same position in the axial direction of the body 10. For example, the plurality of first openings 11a may be evenly distributed in the circumferential direction of the body 10. Figures 2A to 2C Two first openings 11a are shown, that is, one first opening 11a1 and another first opening 11a2. In other embodiments, the first opening 11a may also be one or more than two, and can be set as required. For example, the plurality of first openings 11a are located on the circumference of the same sectional circle of the body 10.

[0081] For example, the fact that the plurality of first channels 11b correspond to the plurality of first openings 11a one by one means that the number of the first channels 11b is the same as that of the first openings 11a, and one first opening 11a corresponds to one first channel 11b.

[0082] For example, as Figure 3A shown, the body 10 includes a second flow guiding portion 102. The second channels 21b are provided in plurality, that is, the diverter 1 includes a plurality of second channels 21b. The second flow guiding portion 102 separates the plurality of second channels 21b, and the plurality of second channels 21b converge at the second cavity 21c. The plurality of second channels 21b are all connected to the second cavity 21c. Figures 3A to 3CTwo second channels 21b are shown, namely one second channel 21b1 and another second channel 21b2. In other embodiments, the second channel 21b may also be one or more than two, and can be set as needed.

[0083] For example, as Figures 3A to 3C shown, the second openings 21a are provided as multiple, that is, the diverter 1 includes multiple second openings 21a, and the multiple second channels 21b correspond to the multiple second openings 21a one by one, and the multiple second openings 21a are distributed in the circumferential direction of the body 10; the multiple second openings 21a are located at the same position in the axial direction of the body 10. For example, the multiple second openings 21a may be evenly distributed in the circumferential direction of the body 10. Figures 3A to 3C Two second openings 21a are shown, that is, the second opening 21a1 and the second opening 21a2. In other embodiments, the second opening 21a may also be one or more than two, and can be set as needed. For example, the multiple second openings 21a are located on the circumference of the same sectional circle of the body 10.

[0084] For example, the multiple second channels 21b corresponding to the multiple second openings 21a one by one means that the number of the second channels 21b is the same as that of the second openings 21a, and one second opening 21a corresponds to one second channel 21b.

[0085] For example, as Figure 2C and Figure 3C shown, the diverter 1 includes a central axis A1. In some embodiments, as Figure 2C shown, the two first channels 11b are arranged axially symmetrically with respect to the central axis A1. In some embodiments, as Figure 3C shown, the two second channels 21b are arranged axially symmetrically with respect to the central axis A1.

[0086] For example, as Figure 2C shown, the first channel 11b extends from a position close to the side surface 1003 to a position close to the central axis A1 and then extends along the extension direction of the central axis A1. For example, as Figure 3C shown, the second channel 21b extends from a position close to the side surface 1003 to a position close to the central axis A1 and then extends along the extension direction of the central axis A1.

[0087] For example, in some embodiments, the diverter 1 is an axially symmetric structure with respect to the central axis A1.

[0088] For example, as Figure 2A shown, the first cavity 11c includes a first step surface 11s. As Figure 2A and Figure 2CAs shown, the first stepped surface 11s divides the first concave cavity 11c into two first sub-concave cavities with different cross-sectional areas in the radial direction. The first stepped surface 11s can be configured to place other components. For example, Figure 3A As shown, the second concave cavity 21c includes a second stepped surface 21s. For example, Figure 3C As shown, the second stepped surface 21s divides the second concave cavity 21c into two second sub-concave cavities with different cross-sectional areas in the radial direction. The second stepped surface 21s can be configured to place other components. Both the first stepped surface 11s and the second stepped surface 21s play a role in limiting positions. Figure 2B One second sub-concave cavity 21c1 and another second sub-concave cavity 21c2 are shown. For example, as Figure 2B shown, the second sub-concave cavity 21c1 and the second sub-concave cavity 21c2 are connected. Figure 3B One first sub-concave cavity 11c1 and another first sub-concave cavity 11c2 are shown. For example, as Figure 3B shown, the first sub-concave cavity 11c1 and the first sub-concave cavity 11c2 are connected.

[0089] Figure 4 shows Figure 2A or Figure 3A a schematic diagram of the diverter shown in a cross-section perpendicular to the axis of the body. Figure 4 The first diversion portion 101 and the second diversion portion 102 are shown. For example, the first diversion portion 101 and the second diversion portion 102 can be an integral structure, and the length of the first diversion portion 101 in the axial direction of the body is less than the length of the second diversion portion 102 in the axial direction of the body. In the case where the first channel 11b is a fluid inlet channel and the second channel 21b is a fluid outlet channel, Figure 4 two fluid inlet channels and two fluid outlet channels are shown. Referring to Figures 2A to 2C , Figures 3A to 3C and Figure 4 , the first channel 11b and the second channel 21b are not connected, and further the first concave cavity 11c and the second concave cavity 21c are not connected, so as to facilitate the realization of the diversion of the fluid entering and discharging the diverter. One of the first channel 11b and the second channel 21b is a fluid inlet channel, and the other of the first channel 11b and the second channel 21b is a fluid outlet channel.

[0090] For example, as Figure 4 shown, in some embodiments, for the convenience of processing and for the balance of the fluid entering and discharging, the apertures of the two first channels 11b are the same, the apertures of the two second channels 21b are the same, and the aperture of the first channel 11b and the aperture of the second channel 21b are the same.

[0091] For example, the diverter can be made of alloy steel material, but not limited to this. The diverter provided by the embodiments of the present disclosure can be made by common processing methods according to its structure.

[0092] Figure 5 FIG. 0 is a front view structure diagram of a hydraulic end provided by at least one embodiment of the present disclosure. Figure 6 FIG. 1 is a top view structure diagram of a hydraulic end further provided by at least one embodiment of the present disclosure. Figure 7 FIG. 2 is a structure diagram of a valve box of a hydraulic end provided by at least one embodiment of the present disclosure. Figure 8 FIG. 3 is a sectional view of a valve box of a hydraulic end provided by at least one embodiment of the present disclosure. Figure 9A FIG. 4 is an assembly diagram of a first guiding portion and a first guiding auxiliary member in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 9B FIG. 5 is a perspective three-dimensional view of a first guiding portion and a first guiding auxiliary member in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 10 FIG. 6 is a three-dimensional view of a first valve seat in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 11A FIG. 7 is an exploded view of a first valve body and a first seal in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 11B FIG. 8 is a three-dimensional view of a first valve body and a first seal in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 11C FIG. 9 is a three-dimensional view of a first valve body and a first seal in a hydraulic end provided by at least one embodiment of the present disclosure from another perspective. Figure 12 FIG. 10 is a three-dimensional view of a spring seat in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 13A FIG. 11 is an assembly diagram of a second guiding portion and a third guiding auxiliary member in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 13B FIG. 12 is a perspective three-dimensional view of a second guiding portion and a third guiding auxiliary member in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 14 FIG. 13 is a three-dimensional view of a second valve seat in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 15A FIG. 14 is an exploded view of a second valve body and a second seal in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 15B FIG. 15 is a three-dimensional view of a second valve body and a second seal in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 15C FIG. 16 is a three-dimensional view of a second valve body and a second seal in a hydraulic end provided by at least one embodiment of the present disclosure from another perspective. Figure 16 FIG. 17 is a three-dimensional view of a gland in a hydraulic end provided by at least one embodiment of the present disclosure. Figure 17 FIG. 18 is a partial schematic diagram of a diverter, a first valve assembly, a first valve seat, and a first guiding portion in a hydraulic end provided by at least one embodiment of the present disclosure. The following will be combined with Figures 5 to 17 to describe in detail the hydraulic end provided by the embodiments of the present disclosure.

[0093] As Figure 5 and Figure 6As shown, the hydraulic end 3 includes: a valve box 2 and any one of the above-mentioned flow dividers 1. The valve box 2 includes an inner cavity 200, and the flow divider 1 is located in the inner cavity 200.

[0094] For example, as Figure 7 shown, the valve box 2 includes an inner cavity 200. For example, as Figure 7 shown, the valve box 2 further includes a liquid inlet hole 211, a liquid discharge hole 212, an upper water pipe connection hole 231, a grease injection hole 232, and a connection hole 233. Referring to Figure 5 , in some embodiments, in order to facilitate the flow of the fluid, the aperture of the liquid inlet hole 211 is the same as the diameter of the first opening 11a of the flow divider 1.

[0095] For example, as Figure 8 shown, the inner cavity 200 includes an alternating cavity 201, a low-pressure cavity 202, and a high-pressure cavity 203, and the alternating cavity 201, the low-pressure cavity 202, and the high-pressure cavity 203 are arranged in sequence along the axial direction of the valve box 2. The second end 1002 is located in the high-pressure cavity 203, the first opening 11a is located in the low-pressure cavity 202, the first end 1001 and the second opening 21a are located in the alternating cavity 201, the second opening 21a communicates with the alternating cavity 201, the valve box 2 includes a liquid inlet hole 211 and a liquid discharge hole 212, the liquid inlet hole 211 communicates with the first opening 11a, and the liquid discharge hole 212 communicates with the high-pressure cavity 203. For example, the axial direction of the valve box 2 is the extending direction of the central axis A0 of the valve box 2. As Figure 8 shown, the axial direction of the valve box 2 is the horizontal direction. For example, in some embodiments, the central axis A1 of the flow divider (refer to Figure 2C and Figure 3C ) coincides with the central axis A0 of the valve box 2 (refer to Figure 8 ).

[0096] For example, referring to Figures 5 to 6 , the hydraulic end 3 further includes a plunger 8. Referring to Figure 8 , the inner cavity 200 further includes a plunger cavity 204, and the plunger cavity 204 is configured to accommodate the plunger 8. Referring to Figure 8 , the plunger cavity 204, the alternating cavity 201, the low-pressure cavity 202, and the high-pressure cavity 203 are arranged in sequence along the axial direction of the valve box 2. The valve box 2 of the hydraulic end has no intersection line, so that the hydraulic end is a through-type hydraulic end. The valve box in the through-type hydraulic end is easy to process, has a compact structure, small liquid discharge resistance, and light weight.

[0097] For example, the alternating cavity 201 can be called the first cavity, the low-pressure cavity 202 can also be called the second cavity, the high-pressure cavity 203 can also be called the third cavity, and the plunger cavity 204 can be called the fourth cavity.

[0098] The hydraulic end provided by the embodiments of the present disclosure is a direct-through hydraulic end, which can solve the problem of cracking of the valve box caused by stress concentration at the intersection line, and extend the service life of the valve box. In other words, the area inside the valve box that bears alternating loads is "transferred", and the place where cracks are likely to appear is "transferred" from the valve box to another component. When the component is damaged, only the component needs to be replaced, which extends the service life of the valve box. After all, the replacement cost of the valve box is relatively high, time-consuming and laborious. That is, the hydraulic end provided by the embodiments of the present disclosure is a direct-through hydraulic end. The first end 1001 of the diverter 1 is located in the alternating cavity 201, which can bear alternating loads. The place where cracks are likely to appear is transferred to the diverter 1. When the diverter 1 is damaged, only the diverter needs to be replaced, so as to better protect the valve box, extend the service life of the valve box, reduce the replacement times of the valve box, reduce costs and save time. For example, the hydraulic end provided by the embodiments of the present disclosure is small in volume and can be connected to the power end of a plunger pump in the prior art or used in connection with a linear motor in the form of a clamp, bolts, etc.

[0099] For example, referring to Figures 2A to 2C , Figures 3A to 3C , Figures 4 to 6 , the diverter is processed with two first channels 11b and two second channels 21b, which can respectively circulate high-pressure liquid and low-pressure liquid. The two first channels are suction channels for circulating low-pressure liquid, and the two second channels are discharge channels for circulating high-pressure liquid. The two first channels and the two second channels are evenly distributed along the axis. Referring to Figures 5 to 8 , the diverter 1 separates the low-pressure cavity, the alternating cavity and the high-pressure cavity, and seals and isolates them respectively through two sealing rings.

[0100] For example, as Figure 8 shown, the inner cavity 200 is a horizontal cavity. The inner cavity 200 is divided into a plunger cavity 204, an alternating cavity 201, a low-pressure cavity 202 and a high-pressure cavity 203 from left to right. Since there is no intersection line in the alternating cavity 201 and the inner cavity 200 has a smooth transition, the phenomenon of cracking of the valve box 2 caused by stress concentration will not occur. For example, as Figure 7 shown, for example, the valve box 2 is provided with a connection hole 233, a grease injection hole 232, a liquid inlet hole 211, and a liquid discharge hole 212. For example, the valve box 2 can be a single-cylinder valve box or a multi-cylinder valve box. For example, the number of liquid inlet holes 211 is equal to the number of first openings 11a. That is, one first opening 11a corresponds to one liquid inlet hole 211.

[0101] For example, the function of the connection hole 233 of the hydraulic end is to fasten the hydraulic end to the equipment, and it is evenly distributed along the axis of the inner cavity. A groove is reserved on one side of the hole opening for placing bolts. The function of the upper water pipe connection hole 231 is to fasten the upper water pipe manifold to the hydraulic end 3, and it is evenly distributed along the axis of the liquid inlet hole. The upper and lower sides of the valve box 2 are symmetrically distributed.

[0102] The liquid inlet hole is the liquid suction channel for the low-pressure medium to enter the valve box 2. The liquid suction channel can be in the form of a single channel, a double channel, a quadruple channel, etc., but is not limited thereto. The liquid discharge hole is the liquid discharge channel for the high-pressure medium to discharge from the valve box 2. Taking the valve body as the center, it can be in the form of a central position, an offset position, etc.

[0103] For example, as Figure 5 shown, there is a part of the alternating cavity 201 between the first end 1001 of the diverter 1 and the valve box 2, which is conducive to the communication between the second opening 21b and the alternating cavity 201, conducive to the diverter 1 bearing the alternating load, and also conducive to the setting of the valve assembly (the first valve assembly mentioned later) in the alternating cavity 201.

[0104] For example, as Figure 5 and Figure 6 shown, the hydraulic end 3 further includes a first valve assembly 31 and a first guiding portion 41. The first valve assembly 31 is located in the alternating cavity 201. The first valve assembly 31 is configured to open to communicate the low-pressure cavity 202 and the alternating cavity 201 or to close to separate the low-pressure cavity 202 and the alternating cavity 201. The first valve assembly 31 includes a first valve body 31a, a first seal 31b and a first valve seat 31c. As Figure 10 shown, the first valve seat 31c is annular and includes a first intermediate hole 310, and the first intermediate hole 310 is configured to allow fluid to flow through. As Figures 11A to 11C shown, the first valve body 31a includes a first main body portion 313 and a first guide rod 311 and a second guide rod 312 respectively arranged on both sides of the first main body portion 313. A part of the first seal 31b is embedded in the first groove G1 of the first main body portion 313. As Figure 5 and Figure 6 shown, the first valve seat 31c and the first guiding portion 41 are located in the first concave cavity 11c, and the first valve body 31a is not in contact with the valve box 2. For example, the first valve seat 31c is circular, but is not limited thereto. The cooperation of the first valve body 31a and the first seal 31b in the first valve assembly 31 is conducive to improving the sealing effect and avoiding pressure leakage.

[0105] In the hydraulic end provided by some embodiments of the present disclosure, the first valve body 31a is not in contact with the valve box 2, which can prevent the first valve body 31a from wearing the valve box 2 under the action of gravity. As Figure 5 and Figure 6 shown, there is a gap between the first valve body 31a and the valve box 2.

[0106] For example, as Figure 5 and Figure 6 shown, the hydraulic end 3 further includes a first spring 51 and a spring seat 61. Referring to Figure 5 、 Figure 6 and Figure 11A , the first spring 51 is located between the spring seat 61 and the first main body portion 313. Referring to Figure 5 、Figure 6 , Figure 9A and Figure 9B , the first guiding part 41 includes a first guiding seat 411 and a first guiding sleeve 412 connected to the first guiding seat 411. A first guiding auxiliary member 401 can be arranged in the first guiding sleeve 412. The first guiding seat 411 includes a first through hole 411a which is configured to allow fluid to flow through. As Figure 5 , Figure 6 , Figure 9A , Figure 9B , and Figures 11A to 11C shown, the first guiding sleeve 412 is configured to accommodate a part of the first guiding rod 311 to guide the first valve body 31a. As Figure 5 , Figure 6 , and Figure 12 shown, the spring seat 61 has a second guiding sleeve 612 which is configured to accommodate a part of the second guiding rod 312 to guide the first valve body 31a, thereby forming double-sided guiding to better guide the first valve body 31a and make the structure of the hydraulic end more stable. The second guiding sleeve 612 plays a guiding role when the first valve body 31 is opened and closed. As Figure 5 and Figure 6 shown, a second guiding auxiliary member 602 can be arranged in the second guiding sleeve 612 to prevent the second guiding rod 312 from being eccentrically worn against the second guiding sleeve 612.

[0107] As Figure 9A and Figure 9B shown, the first guiding seat 411 is connected to the first guiding sleeve 412 through a first connecting member 451 and a second connecting member 452, and the first guiding part 41 includes two first through holes 411a. The first connecting member 451 and the second connecting member 452 are respectively arranged on both sides of the first guiding sleeve 412, and the two first through holes 411a are symmetrically arranged. It should be noted that the structure of the first guiding part 41 is not limited to Figure 9A and Figure 9B shown.

[0108] For example, as Figure 11B and Figure 11C shown, the first seal 31b is in interference fit with the first valve body 31a as a whole to play a sealing role. A first spring 51 is installed on one side of the first valve body 31a to continuously apply elastic force to the first valve body 31a. The first guiding rod 311 and the second guiding rod 312 on both sides of the first valve body 31a are respectively inserted into the first guiding sleeve 412 and the second guiding sleeve 612 so that the first valve body 31a does not become eccentric when moving left and right.

[0109] For example, as Figure 5 and Figure 6 shown, the spring seat 61 is arranged in the inner cavity of the valve box 2. For example, asFigure 12 As shown, the spring seat 61 has an annular groove 61G configured to place the first spring 51 and has a hollow structure 610 configured to allow fluid to flow through. A resilient force is constantly applied to the first valve body 31 by the first spring 51. The structure of the spring seat 61 is hollow to facilitate the flow of the medium. For example, the hollow structure 610 is a through hole. Figure 12 Multiple hollow structures 610 are shown. The hollow structure 610 can be a through hole. The multiple hollow structures 610 can be evenly distributed. Figure 12 Three hollow structures 610 are shown.

[0110] For example, as Figure 5 and Figure 6 shown, the hydraulic end 3 further includes a second valve assembly 32 and a second guiding portion 42. The second valve assembly 32 is located in the high-pressure chamber 203. The second valve assembly 32 is configured to open to connect the alternating chamber 201 and the high-pressure chamber 203 or is configured to close to separate the alternating chamber 201 and the high-pressure chamber 203. The second valve assembly 32 includes a second valve body 32a, a second seal 32b, and a second valve seat 32c. As Figure 5 , Figure 6 , and Figure 14 shown, the second valve seat 32c is annular and includes a second intermediate hole 320 configured to allow fluid to flow through. As Figure 5 , Figure 6 , and Figures 15A to 15C shown, the second valve body 32a includes a second main body portion 325 and a third guide rod 323 and a fourth guide rod 324 separately provided on both sides of the second main body portion 325. A part of the second seal 32b is embedded in the second groove G2 of the second main body portion 325. As Figure 5 and Figure 6 shown, the hydraulic end 3 further includes a second spring 52 and a gland 62. The second spring 52 is located between the gland 62 and the second main body portion 325. The second guiding portion 42 includes a second guiding seat 421 and a third guiding sleeve 422. As Figure 5 , Figure 6 , Figure 13A and Figure 13B shown, the second guiding seat 421 includes a second through hole 421a configured to allow fluid to flow through. The third guiding sleeve 422 is configured to accommodate a part of the third guide rod 323 to guide the second valve body 32a, thereby forming a double-sided guide to better guide the second valve body 32a and making the structure of the hydraulic end more stable. As Figure 5 , Figure 6 , Figure 13A and Figure 13B shown, a third guiding auxiliary member 403 can be provided in the third guiding sleeve 422 to prevent the third guide rod 323 from being eccentrically worn against the third guiding sleeve 422. As Figure 5 ,Figure 6 and Figure 16 As shown, the gland 62 has a fourth guide sleeve 624, and the fourth guide sleeve 624 is configured to accommodate a part of the fourth guide rod 324 to guide the second valve body 32a.

[0111] As Figure 13A and Figure 13B shown, for facilitating the flow of fluid, the first guide seat 411 is connected to the third guide sleeve 422 through a third connecting member 453 and a fourth connecting member 454, and the second guide portion 42 includes two second through holes 421a. The third connecting member 453 and the fourth connecting member 454 are respectively arranged on both sides of the third guide sleeve 422, and the two second through holes 421a are symmetrically arranged. It should be noted that the structure of the second guide portion 42 is not limited to Figure 13A and Figure 13B shown.

[0112] Referring to Figure 2A , Figure 2B , Figure 5 and Figure 6 , the first step surface 11s can be configured to place the first guide portion 41, and the second step surface 21s can be configured to place the second guide portion 42. That is, the first step surface 11s is configured to limit the first guide portion 41, and the second step surface 21s is configured to limit the second guide portion 42.

[0113] For example, the second seal 32b is in interference fit with the second valve body 32a to form an integral body and serves as a seal. A second spring 52 is installed on one side of the second valve body 32a to continuously apply an elastic force to the second valve body 32a. The third guide rod 323 and the fourth guide rod 324 on both sides of the second valve body 32a are respectively inserted into the third guide sleeve 422 and the fourth guide sleeve 624. When the second valve body 32a moves reciprocally left and right, it is ensured that the second valve body 32a does not deviate.

[0114] For example, the first valve assembly 31 and the second valve assembly 32 are symmetrically distributed and can be interchanged, and the first spring 51 and the second spring 52 can also be interchanged.

[0115] For example, as Figure 16 shown, a drain hole 6240 is provided on the fourth guide sleeve 624, and the drain hole 6240 is configured to circulate fluid. As Figure 5 and Figure 6 shown, when a fourth guide auxiliary member 604 is arranged in the fourth guide sleeve 624, a drain hole is also provided on the fourth guide auxiliary member 604 so that the fluid can also flow out through the drain hole in the fourth guide auxiliary member 604 and the drain hole in the fourth guide sleeve 624.

[0116] For example, as Figure 5 , Figure 6 and Figure 16As shown, the gland 62 has a cage-like structure. As Figure 5 and Figure 6 shown, the gland 62 has the following four functions: 1) facilitating the smooth entry of high-pressure fluid into the drain hole; 2) holding the diverter in place to prevent it from moving back and forth; 3) serving as the spring seat of the second valve body; 4) serving as the guide seat of the second valve body. The gland 62 is machined with a bleed hole to facilitate the movement of the second valve body, so that when the fourth guide rod of the second valve body moves, the fluid can flow out, making the movement of the second valve body smooth. For example, the gland is sealed and isolated by an O-ring (fourth guiding auxiliary part) to prevent liquid from entering the gland thread and rusting. For example, the gland is provided with a pulling hole for convenient disassembly during maintenance. This gland integrates multiple functions, making the hydraulic end structure compact.

[0117] As Figure 17 shown, the first valve seat 31c and the diverter 1 are limited in position by a tapered hole fit to prevent the first valve seat 31c from shifting during fluid discharge. Figure 17 The reference numeral 1a in the drawing of Figure 17 represents the surface of the tapered hole. The limiting structure 1b is also shown. The limiting structure 1b includes a limiting step to define the position of the first guiding part 41. The setting of the tapered hole enables the first valve seat 31c and the diverter 1 to be closely fitted during liquid discharge and press the first guide seat 411. The first guide seat 411 can support the first valve seat 31c to prevent it from moving to the right. As Figure 17 shown, the angle formed by the surface of the first valve seat 31c that fits with the diverter 1 and the surface of the first valve seat 31c that fits with the first guide seat 411 is an obtuse angle to match the surface of the tapered hole.

[0118] For example, in the embodiments of the present disclosure, the guiding auxiliary part plays a role in guiding and preventing eccentric wear. The guiding auxiliary part can be made of rubber material, but is not limited thereto. The guiding auxiliary part includes at least one of the first guiding auxiliary part 401, the second guiding auxiliary part 602, the third guiding auxiliary part 403, and the fourth guiding auxiliary part 604.

[0119] In the hydraulic end provided by the embodiments of the present disclosure, for the convenience of installation and maintenance, the first valve assembly 31 and the second valve assembly 32 can be used interchangeably.

[0120] In the hydraulic end provided by the embodiments of the present disclosure, the inner cavity can be single-cylinder or multi-cylinder.

[0121] In the hydraulic end provided by the embodiments of the present disclosure, equipment such as a plunger pump and a linear motor can be carried. When a linear motor is carried, the hydraulic ends are symmetrically distributed on both sides of the motor.

[0122] For example, as Figure 5 and Figure 6 shown, the hydraulic end 3 further includes a gland nut 63. The gland nut 63 is threadedly connected to the valve box 2 and is configured to press the gland 62.

[0123] For example, as Figure 5 and Figure 6 shown, the hydraulic end 3 further includes a plunger 8 and a clamp 7. The internal moving parts of the hydraulic end 3 are the plunger 8, the first valve body 31a, and the second valve body 32a, all of which perform reciprocating motions.

[0124] For example, one side of the clamp 7 of the hydraulic end is mounted on the plunger, and the other side can be connected to a plunger pump or a linear motor, and the rest of the components / parts are installed in the valve box.

[0125] For example, as Figure 5 and Figure 6 shown, one side of the plunger 8 is mounted with a clamp 7 for easy connection to a plunger pump or a linear motor, and the other side extends into the interior of the valve box 2. A drawing hole is machined on this side to facilitate pulling out the plunger from the right side of the valve box during later maintenance; the plunger and the valve box are not in interference fit, so sealing against leakage is required. The seal here is the packing gland 27, which includes an oil scraping ring and packing. The packing is installed between the spacer ring and the compression ring, and the oil scraping ring is installed inside the packing gland nut 28; the packing gland nut 28 is threadedly connected to the valve box 2. Tightening the packing gland nut 28 squeezes and expands the packing to achieve a sealing effect. A small through hole is machined at the right end of the packing gland nut 28 to facilitate the grease in the grease injection hole to enter the valve box 2 to lubricate the packing and the plunger. A large blind hole is machined at the left end of the packing gland nut to facilitate using a tool to tighten the gland nut.

[0126] The working principle of the hydraulic end provided by the embodiments of the present disclosure is as follows.

[0127] When the plunger 8 makes a return stroke ( Figure 5 and Figure 6 in which the plunger moves leftward, Figure 5 is the position at the start of the leftward movement of the plunger), the volume inside the valve box 2 gradually increases, forming a partial vacuum. At this time, the first valve assembly 31 opens and the second valve assembly 32 closes. The medium enters the inner cavity 200 of the valve box 2 through the liquid inlet hole 211 and the first channel 11b in the diverter 1. When the plunger 8 returns to the limit position, the inner cavity 200 of the valve box 2 is filled with the medium, and the liquid suction action is completed.

[0128] When the plunger 8 makes a forward stroke ( Figure 5 and Figure 6 in which the plunger moves rightward, Figure 6 shown is the position at the end of the rightward movement of the plunger), the volume inside the valve box 2 gradually decreases, the medium is squeezed, and the pressure increases. At this time, the second valve assembly 32 opens and the first valve assembly 31 closes. Under the action of the pressure, the medium enters the liquid discharge hole 212 through the second channel 21b in the diverter 1. When the plunger makes a forward stroke to the limit position, the volume inside the valve box 2 is the smallest, and the liquid discharge action ends. Since the plunger 8 continuously reciprocates, the liquid suction and discharge processes alternate, and high-pressure medium is continuously output.

[0129] The above medium is a fluid, which can also be called the diverted substance.

[0130] At least one embodiment of the present disclosure further provides a plunger pump 30, as Figure 18 shown, including any one of the above hydraulic ends 3. The plunger pump 30 further includes a power end 300. The structure of the power end 300 can refer to the power end 002 shown in FIG. 1.

[0131] For example, the plunger pump can be an electric drive skid plunger pump, a vehicle-mounted plunger pump, or a plunger pump driven by a linear motor.

[0132] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure can easily think of changes or substitutions, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A diverter, comprising: The body, the body being cylindrical, the body including a first end, a second end, and a side surface connecting the first end and the second end; A first opening, located on the side surface of the body; A first cavity, located at the first end; A first channel, communicating with the first opening and the first cavity respectively, the first channel extending from the first opening to the first cavity and being configured to circulate a fluid; A second opening, located on the side surface of the body; A second cavity, located at the second end; And A second channel, communicating with the second opening and the second cavity respectively, the second channel extending from the second opening to the second cavity and being configured to circulate a fluid, The body includes a first flow guiding portion, the first channels are provided in plurality, the first flow guiding portion separates the plurality of first channels, and the plurality of first channels converge at the first cavity, The body includes a second flow guiding portion, the second channels are provided in plurality, the second flow guiding portion separates the plurality of second channels, and the plurality of second channels converge at the second cavity.

2. The diverter according to claim 1, wherein, The first opening is closer to the second end than the second opening, and the second opening is closer to the first end than the first opening.

3. The diverter according to claim 1, wherein, The first opening and the second opening are located at different positions in the axial direction of the body.

4. The diverter according to claim 1, wherein, The orientations of the first opening and the second opening are different, and the sizes of the first opening and the second opening are the same.

5. The diverter according to any one of claims 1-4, wherein, The first channel and the second channel are not in communication, and the first cavity and the second cavity are not in communication.

6. The diverter according to any one of claims 1-4, wherein, The first opening is provided in plurality, the plurality of first channels correspond to the plurality of first openings one by one, the plurality of first openings are distributed in the circumferential direction of the body, and the plurality of first openings are located at the same position in the axial direction of the body.

7. The diverter according to any one of claims 1-4, wherein, The second opening is provided in plurality, the plurality of second channels correspond to the plurality of second openings one by one, and the plurality of second openings are distributed in the circumferential direction of the body; The plurality of second openings are located at the same position in the axial direction of the body.

8. The diverter according to any one of claims 1-4, wherein, The first cavity includes a first stepped surface, the first stepped surface divides the first cavity into two first sub-cavities with different cross-sectional areas in the radial direction, the second cavity includes a second stepped surface, and the second stepped surface divides the second cavity into two second sub-cavities with different cross-sectional areas in the radial direction.

9. A fluid end, comprising: A valve box, the valve box including an inner cavity; The diverter according to any one of claims 1-8, the diverter being located in the inner cavity.

10. The fluid end according to claim 9, wherein, The inner cavity includes an alternating cavity, a low-pressure cavity, and a high-pressure cavity, the alternating cavity, the low-pressure cavity, and the high-pressure cavity are arranged in sequence along the axial direction of the valve box, the second end is located in the high-pressure cavity, the first opening is located in the low-pressure cavity, the first end and the second opening are located in the alternating cavity, the second opening communicates with the alternating cavity, the valve box includes a liquid inlet hole and a liquid discharge hole, the liquid inlet hole communicates with the first opening, and the liquid discharge hole communicates with the high-pressure cavity.

11. The fluid end according to claim 10, further comprising a plunger, wherein, The inner cavity further includes a plunger cavity configured to accommodate the plunger, and the plunger cavity, the alternating cavity, the low-pressure cavity, and the high-pressure cavity are sequentially arranged along the axial direction of the valve box.

12. The fluid end according to claim 10, wherein, A part of the alternating cavity is between the first end of the diverter and the valve box.

13. The fluid end according to any one of claims 10-12, further comprising a first valve assembly and a first guiding portion, wherein, The first valve assembly is located in the alternating cavity and is configured to open to communicate the low-pressure cavity and the alternating cavity or to close to separate the low-pressure cavity and the alternating cavity. The first valve assembly includes a first valve body, a first seal, and a first valve seat. The first valve seat is annular and includes a first intermediate hole configured to allow fluid to flow through. The first valve body includes a first main body portion, a first guide rod and a second guide rod separately provided on both sides of the first main body portion. A part of the first seal is embedded in a first groove of the first main body portion. The first valve seat and the first guiding portion are located in the first concave cavity, and the first valve body is not in contact with the valve box.

14. The hydraulic end according to claim 13 further includes a first spring and a spring seat, wherein, The first spring is located between the spring seat and the first main body portion. The first guiding portion includes a first guiding seat and a first guiding sleeve connected to the first guiding seat. The first guiding seat includes a first through hole configured to allow fluid to flow through, and the first guiding sleeve is configured to accommodate a part of the first guide rod to guide the first valve body. The spring seat has a second guiding sleeve configured to accommodate a part of the second guide rod to guide the first valve body.

15. The hydraulic end according to claim 14, wherein, The spring seat has an annular groove configured to place the first spring and a hollow structure configured to allow fluid to flow through.

16. The hydraulic end according to any one of claims 10 - 12 further includes a second valve assembly and a second guiding portion, wherein, The second valve assembly is located in the high-pressure cavity and is configured to open to communicate the alternating cavity and the high-pressure cavity or to close to separate the alternating cavity and the high-pressure cavity. The second valve assembly includes a second valve body, a second seal, and a second valve seat. The second valve seat is annular and includes a second intermediate hole configured to allow fluid to flow through. The second valve body includes a second main body portion, a third guide rod and a fourth guide rod separately provided on both sides of the second main body portion. A part of the second seal is embedded in a second groove of the second main body portion. The hydraulic end further includes a second spring and a gland. The second spring is located between the gland and the second main body portion. The second guiding portion includes a second guiding seat and a third guiding sleeve connected to the second guiding seat. The second guiding seat includes a second through hole configured to allow fluid to flow through, and the third guiding sleeve is configured to accommodate a part of the third guide rod to guide the second valve body. The gland has a fourth guiding sleeve configured to accommodate a part of the fourth guide rod to guide the second valve body.

17. The hydraulic end according to any one of claim 16, wherein, A drain hole is provided on the second guiding sleeve and is configured to allow fluid to flow through.

18. A plunger pump includes the hydraulic end according to any one of claims 9 - 17.

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