Valve seat, fluid end and pump

Abstract

The utility model discloses a valve seat, a fluid end and a pump, and belongs to the technical field of oil gas and mining, the valve seat is provided with a first seat end face, a second seat end face and a connecting side face, in the axial direction of the valve seat, the first seat end face and the second seat end face are located at the two opposite ends of the valve seat and are connected through the connecting side face, and the first seat end face and the second seat end face are connected through the connecting side face. The valve seat is provided with a first liquid inlet channel, and a first port of the first liquid inlet channel is located in the connecting side face. The connecting side face comprises a first sealing ring face and a second sealing ring face, the first sealing ring face is located between the first port and the first seat end face, and the second sealing ring face is located between the first port and the second seat end face. And the axis of the first sealing ring surface and the axis of the second sealing ring surface are collinear. The valve seat can solve the problem that the sealing relation between an existing valve seat and a valve box is prone to losing efficacy.

Description

Technical Field

[0001] This application belongs to the field of oil and gas and mining technology, specifically relating to a valve seat, a hydraulic end and a pump. Background Technology

[0002] Pumps are commonly used equipment in oil and gas extraction. A pump typically consists of a power end and a hydraulic end. The power end transmits power to the hydraulic end to perform liquid suction and discharge operations. In current pumps, the hydraulic end includes a valve box and a valve seat. The valve box has a mounting cavity, and the valve seat is installed within this cavity. On the axial direction of the valve seat, sealing rings are located at opposite ends, ensuring that each sealing ring is pressed between the valve seat and the valve box to provide a seal.

[0003] However, during the operation of the hydraulic end, due to the influence of liquid flow, the valve seat may move slightly relative to the valve box in the axial direction, and the valve seat may also rotate relative to the valve box. This may cause the sealing ring between the valve seat and the valve box to fail due to the movement of the valve seat, resulting in the failure of the sealing relationship between the two. This will have a significant impact on the normal operation of the hydraulic end. Utility Model Content

[0004] The purpose of this application is to provide a valve seat, a hydraulic end, and a pump to solve the problem that the sealing relationship between the current valve seat and valve box is prone to failure.

[0005] In a first aspect, embodiments of this application disclose a valve seat having a first end face, a second end face, and a connecting side. In the axial direction of the valve seat, the first end face and the second end face are located at opposite ends of the valve seat and are connected to each other through the connecting side. The valve seat is provided with a first liquid inlet channel, and the first port of the first liquid inlet channel is located on the connecting side.

[0006] The connecting side includes a first sealing ring surface and a second sealing ring surface. The first sealing ring surface is located between the first port and the first seat end face, and the second sealing ring surface is located between the first port and the second seat end face. The axis of the first sealing ring surface and the axis of the second sealing ring surface are collinear.

[0007] Secondly, this application discloses a hydraulic terminal, which includes a valve box and the aforementioned valve seat. The valve box is provided with a second liquid inlet channel, the valve seat is installed in the valve box, and the first liquid inlet channel is connected to the second liquid inlet channel.

[0008] Thirdly, embodiments of this application disclose a pump that includes the aforementioned hydraulic end.

[0009] This application discloses a valve seat that can cooperate with a valve box for use on the hydraulic end of a pump. The first end face and the second end face of the valve seat are located at opposite ends of the valve seat along its own axial direction, and the first end face and the second end face are connected to each other through a connecting side. The first port of the first liquid inlet channel of the valve seat extends and is located on the connecting side, so that the first liquid inlet channel of the valve seat can communicate with the corresponding second liquid inlet channel on the valve box.

[0010] To ensure that the first and second inlet channels are interconnected while maintaining isolation between the second inlet and second outlet channels on the valve box, the valve seat disclosed in this application includes a first sealing ring surface and a second sealing ring surface on the connecting side. The first sealing ring surface is located between the first port and the first seat end face, and the second sealing ring surface is located between the first port and the second seat end face. Of course, the first outlet channel of the valve seat and the second outlet channel of the valve box are both located outside the space enclosed by the first and second sealing ring surfaces. Under the sealing effect provided by the first and second sealing ring surfaces, the second inlet channel of the valve box can be interconnected with the first inlet channel of the valve seat, and the second inlet channel of the valve box can be isolated from the second outlet channel of the valve box, thereby ensuring that the inlet and outlet processes can be carried out independently.

[0011] Meanwhile, since both the first and second sealing ring surfaces are located on the outer periphery of the valve seat, even if the valve seat experiences slight movement relative to the valve box during operation, the sealing fit between the valve seat and the valve box will not be affected, ensuring a consistently high level of sealing reliability. Furthermore, by aligning the axis of the first and second sealing ring surfaces collinear, the machining of both surfaces can be completed in a single machining operation, reducing the overall machining difficulty and complexity of the valve seat. Attached Figure Description

[0012] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0013] Figure 1 This is a cross-sectional schematic diagram of the valve seat disclosed in the embodiments of this application;

[0014] Figure 2 This is a cross-sectional view of the valve seat disclosed in an embodiment of this application from another direction;

[0015] Figure 3 This is a schematic diagram of the valve seat structure disclosed in the embodiments of this application;

[0016] Figure 4 This is a schematic diagram of the valve seat disclosed in an embodiment of this application from another angle;

[0017] Figure 5 This is a cross-sectional schematic diagram of the hydraulic end disclosed in the embodiments of this application;

[0018] Figure 6 for Figure 5 A partially enlarged view of the structure shown;

[0019] Figure 7 This is a schematic diagram of the liquid inlet process at the hydraulic end disclosed in the embodiments of this application;

[0020] Figure 8 This is a schematic diagram of the liquid discharge process of the hydraulic end disclosed in the embodiments of this application;

[0021] Figure 9 This is a schematic diagram of the structure of the protective plate in the hydraulic end disclosed in an embodiment of this application;

[0022] Figure 10 for Figure 9 The diagram shows the assembly between the protective plate, the drain valve assembly, and the valve seat.

[0023] Figure 11 This is a schematic diagram of another structure of the protective plate in the hydraulic end disclosed in the embodiments of this application;

[0024] Figure 12 for Figure 11 The diagram shows the assembly between the protective plate, the drain valve assembly, and the valve seat.

[0025] Figure 13 This is a schematic diagram of the hydraulic end bushing disclosed in an embodiment of this application;

[0026] Figure 14 This is a cross-sectional schematic diagram of the hydraulic end bushing disclosed in an embodiment of this application;

[0027] Figure 15 This is a schematic diagram showing the assembly between the protective plate, bushing, drain valve assembly, and valve seat.

[0028] Figure 16 This is a schematic diagram of the hydraulic end structure disclosed in the embodiments of this application;

[0029] Figure 17 This is a schematic diagram of the hydraulic end disclosed in an embodiment of this application from another angle.

[0030] Figure 18 This is a schematic diagram of a valve box in a hydraulic terminal disclosed in an embodiment of this application;

[0031] Figure 19This is a schematic diagram of another structure of the valve seat in the hydraulic end disclosed in the embodiments of this application;

[0032] Figure 20 This is another schematic diagram of the structure of the valve seat in the hydraulic end disclosed in the embodiments of this application;

[0033] Figure 21 for Figure 19 A schematic cross-sectional view of the valve seat is shown.

[0034] Figure 22 This is a schematic diagram of the pump structure disclosed in an embodiment of this application.

[0035] Figure label:

[0036] 100-Valve box, 110-Mounting cavity, 111-First annular groove, 112-Second annular groove, 161-Second drain channel, 171-Second inlet channel, 200-Valve seat, 200a-Seat body, 200b-Ring, 211-First sealing ring surface, 212-Second sealing ring surface, 213-First seat end face, 214-Second seat end face, 215-Connecting side, 216-First annular groove, 217-Second annular groove, 220-First inlet channel, 221-First port, 230-Receiving groove, 232-Slot sidewall, 240-First drain channel, 241-Second port, 251-First mating concave surface, 252-Second mating concave surface, 310a-Inlet valve assembly, 310b-Drain valve assembly, 320-Drainage method Lan, 331-Packing box, 332-Packing cap, 333-Packing assembly, 334-Sealing ring, 341-Discharge cap, 342-Discharge gland, 350-Clamp, 360-Tee, 400-Plug, 510-Threaded connector, 520-Fastener, 611-First seal, 612-Second seal, 613-Third seal, 620-Protective plate, 621-Bridging part, 621a-Through hole, 622-Shielding rib, 623-Circumferential connection, 640-Wear ring, 710-Adapter plate, 720-Manifold, 721-Manifold cavity, 722-Inlet, 730-Inlet manifold, 900-Power end, X-First direction, Y-Second direction, Z-Third direction, HP-High pressure chamber, LP-Low pressure chamber, AP-Alternating chamber. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] like Figure 1-22 As shown, this application discloses a valve seat 200, a hydraulic end, and a pump, wherein, as Figure 1 As shown in the figure, this application discloses a valve seat 200, such as Figure 5 As shown, valve seat 200 can be applied to the hydraulic end, and as... Figure 22 As shown, the hydraulic end can also be applied to pumps. Of course, in other solutions, the valve seat 200 can also be applied to other structures or other types of pump structures. For ease of description, the following description will take the application of the valve seat 200 to the hydraulic end of the pump as an example.

[0039] In the pump, the hydraulic end works in conjunction with the power end 900 to pump the liquid. The power end 900 provides the driving force and typically includes a motor or other driving device. The hydraulic end typically includes a valve box 100 and a valve seat 200. Of course, to ensure that the liquid inlet and outlet processes can be carried out independently, the hydraulic end may also include a check valve and necessary sealing devices. The valve box 100 serves as the mounting base for other structures in the hydraulic end, and typically includes a mounting cavity 110. To ensure liquid can enter and exit the hydraulic end, the valve box 100 also has an inlet channel and a outlet channel. During operation, the valve seat 200, in conjunction with a corresponding check valve, allows the hydraulic end to alternately perform inlet and outlet processes. Therefore, the valve seat 200 also has an inlet channel and an outlet channel. For ease of understanding, the inlet channel on the valve seat 200 is designated as the first inlet channel 220, and the inlet channel on the valve box 100 is designated as the second inlet channel 171. Correspondingly, the outlet channel on the valve seat 200 is designated as the first outlet channel 240, and the outlet channel on the valve box 100 is designated as the second outlet channel 161. The first inlet channel 220 is connected to the second inlet channel 171, and the first outlet channel 240 is connected to the second outlet channel 161.

[0040] More in detail, such as Figure 1As shown in this embodiment, the valve seat 200 is generally a block structure, and the valve seat 200 has a first end face 213, a second end face 214, and a side surface. In the axial direction of the valve seat 200, the first end face 213 and the second end face 214 are located at opposite ends of the valve seat 200, and are connected to each other via the side surface. Therefore, the side surface has a connecting function and can also be referred to as the connecting side surface 215. The connecting side surface 215 is the outer peripheral surface of the valve seat 200. Generally speaking, the connecting side surface 215 surrounds the axial direction of the valve seat 200. Optionally, the connecting side 215 can be a cylindrical structure, meaning the radial dimension is the same at any location on the connecting side 215. Alternatively, the connecting side 215 can be an irregular annular structure; for example, a certain location or area, or even an annular area, on the connecting side 215 can be recessed relative to other locations, meaning the radial dimension at that location is smaller than the radial dimensions at other locations. This allows the aforementioned location on the connecting side 215 to form a cavity with the cavity wall of the mounting cavity 110, providing a flow path for the liquid. Intuitively, Figure 16 The direction X in the figure is the axial direction of the valve seat 200. At the same time, this direction X can also be referred to as the first direction.

[0041] To prevent stress concentration at the intersection of the second inlet channel 171 and the second outlet channel 161 in the valve box 100 due to their mutual intersection, in this embodiment, the second inlet channel 171 and the second outlet channel 161 do not intersect. That is, in this embodiment, the valve box 100 does not have a cross intersection line. In this case, to ensure that the hydraulic end can still perform normal inlet and outlet operations, one-way valves are provided at opposite ends of the valve seat 200 along its axial direction. The one-way valves are specifically valve assemblies. The valve assembly provided at one end of the valve seat 200 is the inlet valve assembly 310a, and the valve assembly provided at the other end of the valve seat 200 is the outlet valve assembly 310b. Correspondingly, The second inlet channel 171 of the valve box 100 is located at a position corresponding to or near the inlet valve assembly 310a, and the second outlet channel 161 of the valve box 100 is located at a position corresponding to or near the outlet valve assembly 310b. As described above, since the inlet valve assembly 310a and the outlet valve assembly 310b are distributed along the axial direction of the valve seat 200 and are spaced apart by the valve seat 200, the second inlet channel 171 and the second outlet channel 161 on the valve box 100 also have a certain dimensional interval in the aforementioned axial direction. This ensures that the second inlet channel 171 and the second outlet channel 161 do not intersect, so that the valve box 100 of the hydraulic end disclosed in this application embodiment does not have a cross intersection line, which can improve the service life of the valve box 100.

[0042] As described above, the valve seat 200 is provided with a first liquid inlet channel 220, the valve box 100 is provided with a second liquid inlet channel 171, and the valve box 100 is provided with a mounting cavity 110. The valve seat 200 is installed in the mounting cavity 110 of the valve box 100. Furthermore, in order to ensure that the first liquid inlet channel 220 can communicate with the second liquid inlet channel 171, in this embodiment of the application, the first port 221 of the first liquid inlet channel 220 is located on the connecting side 215. That is, the first port 221 of the first liquid inlet channel 220 extends to the connecting side 215 of the valve seat 200, so as to ensure that the first liquid inlet channel 220 can communicate with the second liquid inlet channel 171 provided on the outer periphery of the mounting cavity 110 of the valve box 100. As for the other end of the first liquid inlet channel 220 of the valve seat 200, it can be extended to the location of the liquid inlet valve assembly 310a, so that the liquid that enters the valve box 100 through the second liquid inlet channel 171 can enter the area where the liquid inlet valve assembly 310a is located through the first liquid inlet channel 220.

[0043] Meanwhile, the first drain channel 240 of the valve seat 200 is used to connect the areas where the inlet valve assembly 310a and the drain valve assembly 310b are located respectively. As described above, in the hydraulic end disclosed in the embodiments of this application, the inlet valve assembly 310a and the drain valve assembly 310b are located outside the opposite ends of the valve seat 200. In this case, the first drain channel 240 can be provided to penetrate the valve seat 200 along the axial direction of the valve seat 200, so that the side where the first seat end face 213 of the valve seat 200 is located and the side where the second seat end face 214 is located can be connected through the first drain channel 240. More specifically, taking the axial direction of the valve seat 200 as the left-right direction, and the side where the first seat end face 213 is located as the left side of the valve seat 200, and the side where the second seat end face 214 is located as the right side of the valve seat 200, the first drainage channel 240 can connect the left and right sides of the valve seat 200. One of the inlet valve assembly 310a and the drainage valve assembly 310b is located on the left, and the other on the right, ensuring that liquid drawn into the area of ​​the inlet valve assembly 310a can flow through the first drainage channel 240 to the area of ​​the drainage valve assembly 310b. Furthermore, to prevent stress concentration in the valve seat 200, in the valve seat 200 disclosed in this embodiment, the first drainage channel 240 and the first inlet channel 220 do not intersect. This ensures that the valve seat 200 does not have a cross-shaped intersection line due to the intersecting channels, guaranteeing that the stress at different locations on the valve seat 200 is relatively dispersed, preventing the valve seat 200 from being easily damaged due to stress concentration.

[0044] Furthermore, a second drain channel 161 is provided on the valve box 100 at the position corresponding to the drain valve assembly 310b, so that liquid flowing into the area where the drain valve assembly 310b is located can be discharged outside the valve box 100 through the second drain channel 161, allowing the liquid to complete one intake and discharge cycle. During repeated intake and discharge cycles, liquid can be continuously drawn in through the second inlet channel 171 and discharged through the second drain channel 161.

[0045] More specifically, the power end 900 drives the aforementioned liquid inlet and liquid outlet operations to reciprocate by driving the plunger 400. Specifically, as the plunger 400 moves away from the liquid inlet valve assembly 310a, liquid is drawn in; as the plunger 400 moves towards the liquid inlet valve assembly 310a, liquid is discharged. That is, in the plunger 400 pump disclosed in this application embodiment, the plunger 400 is located on the side of the liquid inlet valve assembly 310a away from the valve seat 200, forming an alternating cavity AP between the plunger 400 and the liquid inlet valve assembly 310a. During the movement of the plunger 400, a portion of the plunger 400 can extend into the mounting cavity 110. Therefore, one end of the mounting cavity 110 of the valve box 100 can extend to the surface of the side where the plunger 400 is located, allowing the plunger 400 to extend into the mounting cavity 110 and reciprocate relative to the valve box 100.

[0046] Of course, in order to ensure a reliable seal between the plunger 400 and the mounting cavity 110, the pump is also equipped with a packing assembly 333 and other devices. Specifically, the packing box 331 is fixedly installed on the side of the valve box 100 where the plunger 400 is located. More specifically, when there are multiple valve boxes 100, and the multiple valve boxes 100 are fixedly connected by an adapter plate 710, the packing box 331 can be fixed to the adapter plate 710, thereby indirectly forming a fixed relationship with the valve box 100. The packing box 331 also has a through cavity to accommodate the plunger 400. A sealing ring 334 is provided between the packing box 331 and the valve box 100, and the sealing ring 334 is usually made of metal to provide a seal for the connection surface between the packing box 331 and the valve box 100. A packing assembly 333 is provided on the side of the packing box 331 away from the valve box 100, which is used to provide a seal between the plunger 400 and the packing box 331. In order to ensure a stable fit between the packing assembly 333 and the packing box 331, a packing pressure cap 332 is provided on the outer side of the packing assembly 333, and the outer surface of the packing pressure cap 332 is threadedly connected to the inner surface of the through cavity of the packing box 331. In addition, a clamp 350 can also be provided on the side of the packing pressure cap 332 away from the packing assembly 333, and the plunger is connected to the power end 900 through the clamp 350.

[0047] As described above, since the valve seat 200, the inlet valve assembly 310a, and the outlet valve assembly 310b are all installed within the mounting cavity 110 of the valve box 100, and even a portion of the plunger 400 may be located within the mounting cavity 110 of the valve box 100, and since the second inlet channel 171 and the second outlet channel 161 of the valve box 100 are both interconnected with the mounting cavity 110 of the valve box 100, in order to ensure that the inlet and outlet processes can be carried out independently, when assembling the valve seat 200 and the valve... During the process of filling the valve box 100, it is necessary to ensure that the second liquid inlet channel 171 and the second liquid outlet channel 161 are isolated from each other, so as to ensure that the liquid entering the valve box 100 through the second liquid inlet channel 171 can only flow to the valve seat 200 or flow through the valve seat 200 to the area where the liquid inlet valve assembly 310a is located. Correspondingly, it is ensured that the liquid in the area where the liquid outlet valve assembly 310b is located can only flow out of the valve box 100 through the second liquid outlet channel 161, and will not flow back to the second liquid inlet channel 171.

[0048] To ensure that the second inlet channel 171 and the second outlet channel 161 are isolated from each other, related technologies use sealing rings at opposite ends of the valve seat 200 to form a sealing structure with the two sealing rings and the side of the valve seat 200, preventing direct exchange of liquids in the second inlet channel 171 and the second outlet channel 161. However, during pump operation, the flow of liquid may cause slight wobbling of the valve box 100 relative to the valve box 100, and the valve seat 200 may even rotate relative to the valve box 100. This can significantly affect the sealing reliability of the sealing rings at opposite ends of the valve seat 200, thus hindering the normal operation of the pump.

[0049] Therefore, in the valve seat 200 disclosed in this application embodiment, its connecting side 215 includes a first sealing ring surface 211 and a second sealing ring surface 212. The first sealing ring surface 211 is located between the first port 221 and the first seat end face 213, and the second sealing ring surface 212 is located between the first port 221 and the second seat end face 214. As the names suggest, both the first sealing ring surface 211 and the second sealing ring surface 212 are used to provide a sealing effect, or they cooperate with structures such as sealing rings to produce a sealing effect.

[0050] More specifically, the first sealing ring surface 211 and the second sealing ring surface 212 respectively mate with the sealing ring to form a sealed fit with the cavity wall (i.e., the annular inner wall) of the mounting cavity 110 of the valve box 100. More specifically, a first sealing element 611 is provided between the first sealing ring surface 211 and the cavity wall of the mounting cavity 110, and a second sealing element 612 is provided between the second sealing ring surface 212 and the cavity wall of the mounting cavity 110. The cavity wall of the mounting cavity 110, the first sealing element 611, the connecting side 215, and the second sealing element 612 can form a sealed space, ensuring that the second liquid inlet channel 171 can only communicate with the first liquid inlet channel 220 through the aforementioned sealed space, and that the second liquid outlet channel 161 is located outside the aforementioned sealed space, ensuring that the second liquid inlet channel 171 and the second liquid outlet channel 161 are mutually isolated.

[0051] As described above, the first drain channel 240 is provided through the valve seat 200 in the axial direction. Therefore, one of the opposite ends of the first drain channel 240 is located on the side of the first seal 611 away from the second seal 612, and the other is located on the side of the second seal 612 away from the first seal 611. This ensures that the second drain channel is located outside the aforementioned sealing space, so that the second inlet channel can form a good isolation relationship with the second drain channel.

[0052] As described above, in this embodiment, the first sealing element 611 and the second sealing element 612, which provide a sealing effect, are both sandwiched between the connecting side 215 of the valve seat 200 and the cavity wall of the mounting cavity 110 of the valve box 100. In this case, even if the valve seat 200 shakes slightly relative to the valve box 100, or even if the valve seat 200 rotates relative to the valve box 100, it will not affect the sealing effect of the first sealing element 611 and the second sealing element 612, thereby ensuring that the sealing fit between the valve seat and the valve box remains relatively stable.

[0053] It should be noted that both the first sealing ring surface 211 and the second sealing ring surface 212 are closed ring structures. They can be recessed or protruded relative to other parts of the connecting side 215 (i.e., the part of the connecting ring surface located between the first sealing ring surface 211 and the second sealing ring surface 212 in the axial direction of the valve seat 200), or they can be flush with the aforementioned other parts. This article does not limit this.

[0054] To further improve the sealing reliability of the first seal 611 and the second seal 612, during the processing of the valve box 100 and the valve seat 200, an annular groove can be provided on at least one of the cavity wall of the mounting cavity 110 of the valve box 100 and the connecting side 215 of the valve seat 200. The annular groove may include a first annular groove 216 and a second annular groove. The first seal 611 can be installed in the first annular groove 216, and correspondingly, the second seal 612 is installed in the second annular groove. Both the first seal 611 and the second seal 612 are in sealing cooperation with the valve seat 200 and the valve box 100. Specifically, the inner side of each of the first seal 611 and the second seal 612 is in sealing cooperation with the valve seat 200, and the outer side of each of the first seal 611 and the second seal 612 is in sealing cooperation with the valve box 100.

[0055] To reduce processing difficulty, more specifically, the first annular groove 216 can be entirely located on the outer peripheral surface of the valve seat 200 (i.e., the connecting side 215) or the cavity wall of the mounting cavity of the valve box 100. Correspondingly, the second annular groove can also be entirely located on the outer peripheral surface of the valve seat (i.e., the connecting side 215) or the cavity wall of the mounting cavity of the valve box 100. For example, as Figure 18 As shown, the cavity wall of the valve box mounting cavity 110 is provided with a first annular groove 111 and a second annular groove 112 that are spaced apart along the aforementioned axial direction.

[0056] In another embodiment of this application, such as Figure 19 As shown, the connecting side 215 of the valve seat 200 is provided with a first annular groove 216 and a second annular groove 217 distributed at intervals along the aforementioned axial direction. Of course, in this case, the first annular groove 216 can be equivalent to at least a part of the first sealing ring surface 211, and the second annular groove 217 can be equivalent to at least a part of the second sealing ring surface 212. That is, the first sealing ring surface 211 and the second sealing ring surface 212 are recessed relative to other parts of the connecting side 215.

[0057] When the valve seat 200 is provided with a first annular groove 216 and a second annular groove, since both are located on the outer surface of the valve seat 200, the processing difficulty of the first annular groove 216 and the second annular groove can be reduced. In addition, in this case, the valve box 100 can be formed by integral molding, and by extending the mounting cavity 110 to the outer surface of the valve box 100, the first seal 611 can be pre-installed in the first annular groove 216 and the second seal 612 can be installed in the second annular groove during the assembly of the valve box 100 and the valve seat 200. Then, the valve seat 200 can be gradually pushed into the mounting cavity 110 from the opening of the mounting cavity 110 located on the outer surface of the valve box 100. As the valve seat 200 gradually enters the mounting cavity 110, the first seal 611 and the second seal 612 can be correspondingly squeezed to ensure that the first seal 611 and the second seal 612 can form a squeeze fit relationship with the cavity wall of the mounting cavity 110, which can further reduce the installation difficulty of the first seal and the second seal 612.

[0058] To prevent excessive annular grooves from negatively impacting the structural strength of the device, in another embodiment of this application, one of the first annular groove 216 and the second annular groove is disposed on the valve seat 200, and the other is disposed on the valve box 100. For example, the valve seat 200 is provided with the first annular groove 216, and the cavity wall of the mounting cavity 110 of the valve box 100 is provided with the second annular groove. Correspondingly, in the axial direction of the valve seat 200, the first port 221 of the first liquid inlet channel 220 is located between the first annular groove 216 and the second annular groove.

[0059] To reduce the overall machining difficulty of the valve seat 200, in a further embodiment of this application, the axis of the first sealing ring surface 211 and the axis of the second sealing ring surface 212 can be collinearly arranged. Of course, in designing the valve box 100, it is also necessary to ensure that the axes of the portions in the mounting cavity 110 of the valve box 100 that mate with the first sealing ring surface 211 and the second sealing ring surface 212 are also collinearly arranged. This ensures that the valve seat 200 can be installed more accurately at the corresponding position in the mounting cavity 110 of the valve box 100, and that the mating clearance between the valve seat 200 and the valve box 100 (or, in other words, between the first sealing ring surface 211 and the second sealing ring surface 212 and the valve box 100) is relatively smaller. This further improves the tightness of the fit between the valve seat 200 and the valve box 100, and allows the first sealing ring surface 211 and the second sealing ring surface 212 to be completed in a single machining process.

[0060] In detail, during the machining of the valve seat, the first sealing ring surface 211 and the second sealing ring surface 212 can be formed on the outer surface of the semi-finished part by cutting or other methods. During this process, the semi-finished part can be clamped on the machine tool for cutting. After the first sealing ring surface 211 is machined, the second sealing ring surface 212 can be further cut without removing the semi-finished part from the machine tool. This can reduce the machining difficulty of the entire valve seat 200.

[0061] This application discloses a valve seat 200, which can cooperate with a valve box 100 for use on the hydraulic end of a pump. The first end face 213 and the second end face 214 of the valve seat 200 are located at opposite ends of the valve seat 200 along its own axial direction, and the first end face 213 and the second end face 214 are connected to each other through a connecting side 215. The first port 221 of the first liquid inlet channel 220 of the valve seat 200 extends and is located on the connecting side 215, so that the first liquid inlet channel 220 of the valve seat 200 can communicate with the corresponding second liquid inlet channel 171 on the valve box 100.

[0062] To ensure that the first inlet channel 220 and the second inlet channel 171 are interconnected while maintaining mutual isolation between the second inlet channel 171 and the second outlet channel 161 on the valve box 100, the valve seat 200 disclosed in this application embodiment includes a first sealing ring surface 211 and a second sealing ring surface 212 on the connecting side 215. The first sealing ring surface 211 is located between the first port 221 and the first seat end face 213, and the second sealing ring surface 212 is located between the first port 221 and the second seat end face 214. Of course, the first outlet channel 212 of the valve seat 200... Both the liquid channel 240 and the second drain channel 161 of the valve box 100 are located outside the space enclosed between the first sealing ring surface 211 and the second sealing ring surface 212. Under the sealing effect provided by the first sealing ring surface 211 and the second sealing ring surface 212, the second liquid inlet channel 171 of the valve box 100 can communicate with the first liquid inlet channel 220 of the valve seat 200, and ensure that the second liquid inlet channel 171 of the valve box 100 can be isolated from the second drain channel 161 of the valve box 100, thereby ensuring that the liquid inlet process and the liquid drain process can be carried out independently.

[0063] Meanwhile, since both the first sealing ring surface 211 and the second sealing ring surface 212 are located on the outer periphery of the valve seat 200, even if the valve seat 200 experiences slight shaking relative to the valve box 100 during operation, the sealing fit between the valve seat 200 and the valve box 100 will not be affected, ensuring that the sealing reliability between the valve seat 200 and the valve box 100 remains relatively high. Furthermore, by aligning the axis of the first sealing ring surface 211 with the axis of the second sealing ring surface 212 collinearly, the machining of both the first and second sealing ring surfaces can be completed simultaneously in a single machining operation, thereby reducing the overall machining difficulty and complexity of the valve seat.

[0064] As described above, the valve seat 200 is provided with a first liquid inlet channel 220. Optionally, the valve seat 200 has only one first liquid inlet channel 220. In order to further improve the liquid inlet efficiency of the valve seat 200, in other embodiments of this application, the number of first liquid inlet channels 220 can be multiple. Of course, in order to ensure that each first liquid inlet channel 220 can be connected to the second liquid inlet channel 171 on the valve box 100, the first port 221 of each of the multiple first liquid inlet channels 220 is located on the connecting side 215. More specifically, the first ports 221 of the multiple first liquid inlet channels 220 can be distributed circumferentially at intervals along the connecting side 215.

[0065] As described above, the second liquid inlet channel 171 on the valve box 100 is located on the outer periphery of the mounting cavity 110. Therefore, when there are multiple first liquid inlet channels 220 on the valve seat 200, there can also be multiple second liquid inlet channels 171 on the valve box 100, and each first liquid inlet channel 220 of the valve seat 200 installed in a certain mounting cavity 110 is correspondingly provided with at least one second liquid inlet channel 171. Considering that other channel structures are usually required on the valve box 100, in order to reduce the design difficulty, in a specific embodiment of this application, each mounting cavity 110 in the valve box 100 can be correspondingly provided with one or two second liquid inlet channels 171.

[0066] When the number of second liquid inlet channels 171 corresponding to any mounting cavity 110 is less than the number of first liquid inlet channels 220 installed in the valve seat 200 in the mounting cavity 110, a communicating cavity can be formed between the connecting side 215 and the cavity wall of the mounting cavity 110 by recessing the area where the first port 221 is located in the connecting side 215. When the aforementioned recessed area of ​​the connecting side 215 is arranged around the entire cavity, each first liquid inlet channel 220 and each second liquid inlet channel 171 can communicate with the aforementioned communicating cavity, ensuring that the liquid entering the aforementioned communicating cavity through the second liquid inlet channel 171 can flow into different first liquid inlet channels 220 respectively.

[0067] It should be noted that, in the embodiments of this application, since the number of second liquid inlet channels 171 corresponding to any mounting cavity 110 is less than the number of first liquid inlet channels 220 of the valve seat 200 installed in the mounting cavity 110, when one or more of the multiple first liquid inlet channels 220 are directly opposite one or more of the second liquid inlet channels 171, it is objectively impossible for the remaining one or more of the multiple first liquid inlet channels 220 to be directly opposite the other second liquid inlet channels 171.

[0068] Based on the above, in order to improve the liquid inlet efficiency of each first liquid inlet channel 220, optionally, multiple first ports 221 are distributed circumferentially at intervals along the connecting side 215. This can improve the dispersion of the multiple first liquid inlet channels 220, thereby ensuring that the liquid inlet efficiency of one or more first liquid inlet channels 220 that are not directly opposite the second liquid inlet channel 171 is also relatively high. In a further embodiment of this application, multiple first liquid inlet channels 220 are uniformly arranged in the direction surrounding the axial direction of the valve seat 200 (i.e., the circumferential direction of the connecting side 215), which can further improve the structural reliability of the valve seat 200.

[0069] Furthermore, when there are multiple second liquid inlet channels 171, these channels can be evenly arranged in a direction surrounding the axial direction of the valve seat 200. For example, in a specific embodiment of this application, where the valve seat 200 is generally cubic in shape, one second liquid inlet channel 171 can be provided above and below any mounting cavity 110, wherein the aforementioned distribution direction above and below is specifically a second direction, i.e. Figure 16 The direction is Y. Of course, in cases where other requirements exist, a second liquid inlet channel 171 can be provided above or below any mounting cavity 110. By appropriately increasing the cross-sectional area and other parameters of the second liquid inlet channel 171, it can be ensured to a certain extent that one second liquid inlet channel 171 can supply liquid to multiple first liquid inlet channels 220 relatively efficiently. In addition, the extension direction of the second liquid inlet channel 171 can be parallel to the second direction, or it can be inclined relative to the second direction. Of course, in order to maximize the liquid inlet efficiency of the second liquid inlet channels 171 corresponding to the multiple mounting cavities 110 and improve the space utilization of the valve box 100, the extension direction of each second liquid inlet channel 171 is located in the plane formed by the second direction and the first direction.

[0070] To improve the drainage efficiency of the valve seat 200, similarly, the number of first drainage channels 240 can also be multiple, and the multiple first drainage channels 240 are distributed circumferentially along the connecting side 215. Optionally, the first drainage channel 240 has a curved extension structure. To improve the drainage efficiency of the first drainage channel 240, in a specific embodiment of this application, the first drainage channel 240 has a straight structure. As mentioned above, the first drainage channel 240 can provide communication between the inlet valve assembly 310a and the drain valve assembly 310b on opposite sides of the valve seat 200. Therefore, in a specific embodiment of this application, the first drainage channel 240 can extend along the axial direction of the valve seat 200, that is, the extension directions of the multiple first drainage channels 240 are all parallel to each other and all parallel to the straight line where the axial direction of the valve seat 200 lies.

[0071] To improve the space utilization of the valve seat 200, in another embodiment of this application, the extending direction of the first drain channel 240 can be inclined relative to the axial direction of the valve seat 200. In this case, the extending directions of the multiple first drain channels 240 may no longer be parallel to each other, but overall, the multiple first drain channels 240 can still be distributed at intervals along the direction surrounding the axial direction of the valve seat 200. Of course, when there are multiple first inlet channels 220 and multiple first drain channels 240, no two first inlet channels 220 and no two first drain channels 240 intersect each other to ensure that the valve seat 200 does not form a cross intersection line, thereby improving the overall service life of the valve seat 200.

[0072] As described above, in the hydraulic end of the pump, along the axial direction of the valve seat 200, an inlet valve assembly 310a and a outlet valve assembly 310b are respectively provided outside the opposite ends of the valve seat 200. In order to increase the liquid capacity in the area outside the opposite ends of the valve seat 200 and improve the fit between the valve seat 200 and the valve assembly, in a specific embodiment of this application, the valve seat 200 has a first mating concave surface 251, and the first mating concave surface 251 is recessed relative to the first seat end face 213. The first mating concave surface 251 is used to mate with the valve assembly. For example, if the first seat end face 213 is located on the side of the valve seat 200 facing the inlet valve assembly 310a, then the first mating concave surface 251 is used to mate with the inlet valve assembly 310a.

[0073] More specifically, during the liquid inlet process, the plunger 400 moves away from the valve seat 200, allowing it to draw liquid from the second liquid inlet channel 171. This causes the liquid to flow along the second liquid inlet channel 171 through the first liquid inlet channel 220 to the area where the liquid inlet valve assembly 310a is located, during which the liquid inlet valve assembly 310a opens. Correspondingly, during the liquid outlet process, the plunger 400 moves towards the valve seat 200, allowing it to push the liquid in the area where the liquid inlet valve assembly 310a is located. This drives the liquid through the first liquid outlet channel 240 to the area where the liquid outlet valve assembly 310b is located, opening the liquid outlet valve assembly 310b and allowing the liquid to be discharged through the second liquid outlet channel 161 to the outside of the valve box 100.

[0074] Optionally, the axis of the first mating concave surface 251 is not collinear with the axis of the first sealing ring surface 211. For example, the two may have an angle greater than 0° and less than 90°. Alternatively, in another embodiment of this application, the axis of the first mating concave surface 251 may be parallel to and not collinear with the axis of the first sealing ring surface 211. In this case, the liquid inlet valve assembly 310a and the valve seat 200 are misaligned.

[0075] In order to improve the fitting accuracy between the valve assembly that mates with the first mating concave surface 251 and the valve seat 200, and to reduce the decrease in flow velocity of the liquid due to turning or translation during the flow process, in another embodiment of this application, the axis of the first mating concave surface 251 can be collinear with the axis of the first sealing ring surface 211 to improve the liquid exchange efficiency.

[0076] Furthermore, a mating concave surface may also be provided on one side of the second seat end face 214 in the valve seat 200. Specifically, the mating concave surface is a second mating concave surface 252, and the second mating concave surface 252 is recessed relative to the second seat end face 214. This allows the valve seat 200 to increase the volume of the area where the corresponding valve assembly is located through the second mating concave surface 252, and can also improve the mating stability of the valve seat 200 and the valve assembly on the side where the second mating concave surface 252 is located to a certain extent.

[0077] Similarly, the axis of the second mating concave surface 252 can also be non-collinear with the axis of the second sealing ring surface 212. In another embodiment of this application, in order to further improve the liquid exchange efficiency, the axis of the second mating concave surface 252 can be collinear with the axis of the second sealing ring surface 212.

[0078] When the valve seat 200 has a first mating concave surface 251 and a second mating concave surface 252 at opposite ends, the number of the first liquid inlet channel 220 and the second liquid inlet channel 171 can be multiple. The first port 221 of each of the multiple first liquid inlet channels 220 extends to the connecting side 215, and the other port of each of the multiple first liquid inlet channels 220 can extend to the central area of ​​the valve seat 200 and close to the side of the first mating concave surface 251. In this case, a cavity can be set in the aforementioned central area of ​​the valve seat 200 close to the first mating concave surface 251 so that one port of each of the multiple first liquid inlet channels 220 can communicate with the aforementioned cavity. At the same time, the aforementioned cavity is connected to the first mating concave surface 251 so that when the liquid inlet valve assembly 310a is opened, the aforementioned cavity is connected to the area where the liquid inlet valve assembly 310a is located, thereby further improving the liquid inlet efficiency.

[0079] Meanwhile, one end of each of the multiple second liquid inlet channels 171 can extend to the first seat end face 213. Since the central region of the valve seat 200 has the aforementioned cavity near the first mating concave surface 251, the aforementioned ports of the multiple second liquid inlet channels 171 can be located in a relatively outer region of the first seat end face 213. This makes the dispersion between the first liquid inlet channel 220 and the first liquid outlet channel 240 relatively stronger, further improving the structural stability of the valve seat 200 and minimizing the mutual interference between the liquid inlet and liquid outlet processes. Furthermore, each first liquid outlet channel 240 can extend obliquely relative to the axial direction of the valve seat 200, so that the other end of each first liquid outlet channel 240 (denoted as the second port 241) can extend to the central region of the second mating concave surface 252 and communicate with the liquid outlet valve assembly 310b located on the side of the second mating concave surface 252.

[0080] Based on the valve seat 200 disclosed in any of the above embodiments, this application also discloses a hydraulic end, which includes a valve box 100 and any of the above valve seats 200. As described above, the valve box 100 is provided with a mounting cavity 110, a second liquid inlet channel 171 and a second liquid outlet channel 161. The valve seat 200 can be installed in the mounting cavity 110 of the valve box 100, and the second liquid inlet channel 171 is connected to the first liquid inlet channel 220, and the second liquid outlet channel 161 is connected to the first liquid outlet channel 240. Of course, the hydraulic end may also include the first sealing member 611 and the second sealing member 612 used to provide a sealing effect for the valve seat 200 and the valve box 100. In addition, the hydraulic end may also include a liquid inlet valve assembly 310a and a liquid outlet valve assembly 310b.

[0081] More specifically, as described above, the valve seat 200 is installed in the mounting cavity 110 of the valve box 100. In order to ensure that the valve seat 200 can be installed in the mounting cavity 110, the valve box 100 may optionally include two symmetrically arranged structures, and the two structures are connected and fixed to each other to form the mounting cavity 110. Thus, the valve seat 200 can be installed in one of the structures first, and then the two structures can be fixedly connected to ensure that the valve seat 200 can be installed in the mounting cavity 110.

[0082] To improve the structural reliability and sealing performance of the valve box 100, in another embodiment of this application, the mounting cavity 110 is provided through the valve box 100 along the axial direction of the valve seat 200. That is, in the axial direction of the valve seat 200, the mounting cavity 110 extends from one end face of the valve box 100 to the other end face of the valve box 100. At the same time, by making the size of the opening of the mounting cavity 110 on at least one end face of the valve box 100 larger than the maximum diameter of the valve seat 200, it can also be ensured that the valve seat 200 can be installed in the mounting cavity 110 of the valve box 100 through the aforementioned opening.

[0083] Of course, after the valve seat 200 is installed in the mounting cavity 110, in order to ensure that the mounting cavity 110 can still form a sealed environment, the hydraulic end may also include structures such as a discharge cap 341 and a discharge cover 342. The discharge cover 342 is located on the side of the discharge valve assembly 310b away from the valve seat 200, and the discharge cover 342 is fixed relative to the valve box 100. The discharge cap 341 is installed on the side of the discharge cover 342 away from the discharge valve assembly 310b, and the discharge cap 341 can be connected to the valve box 100 by threads to form a relatively reliable fixed relationship between the discharge cap 341 and the valve box 100. Of course, a sealing ring may be provided between the discharge cover 342 and the valve box 100 to ensure a relatively reliable sealing effect between the two.

[0084] As described above, the valve box 100 is provided with an installation cavity 110, and a valve seat 200 and other devices are installed in the installation cavity 110. In order to further improve the working efficiency of the hydraulic end, in a specific embodiment of this application, the valve box 100 can be provided with multiple installation cavities 110, and a valve seat 200, an inlet valve assembly 310a and an outlet valve assembly 310b and other devices can be installed in any installation cavity 110.

[0085] To enhance the applicability of the valve box 100, in another embodiment of the hydraulic terminal disclosed in this application, there are multiple valve boxes 100. Correspondingly, each valve box 100 is provided with a correspondingly connected mounting cavity 110, a second liquid inlet channel 171, and a second liquid outlet channel 161. Of course, the number of mounting cavities 110 provided in each mounting cavity 110 can be one or more, which is not limited herein. In a specific embodiment of this application, if the hydraulic terminal includes multiple valve boxes 100, each valve box 100 can be provided with only one mounting cavity 110, and the specific number of valve boxes 100 required for the hydraulic terminal can be flexibly selected according to the actual on-site working conditions.

[0086] Meanwhile, to facilitate the assembly of multiple valve boxes 100, in this embodiment, the hydraulic end also includes an adapter plate 710. Multiple valve boxes 100 can be distributed along the length of the adapter plate 710 and are all fixedly connected to it. That is, in the hydraulic end disclosed in this embodiment, the adapter plate 710 can be used to provide a mounting base for multiple valve boxes 100, thereby allowing the multiple valve boxes 100 to form a relatively fixed relationship through the adapter plate 710, thus reducing the assembly difficulty of the multiple valve boxes 100.

[0087] Specifically, the adapter plate 710 can be made of a material with relatively high structural strength, such as metal. The adapter plate 710 is typically a rectangular plate structure, and its length, width, and thickness can be flexibly selected according to actual needs. Furthermore, multiple valve boxes 100 can be fixedly assembled with the adapter plate 710 via threaded connections. The valve box 100 may have threaded holes, and the adapter plate 710 may have through holes. Connecting bolts can pass through the through holes of the adapter plate 710 and connect with the threaded holes of the valve box 100 to form a threaded connection. Considering the relatively large weight and other parameters of components such as valve box 100, and the relatively severe vibrations generated during operation, in another embodiment of this application, to further improve the assembly stability between valve boxes 100, a through hole can be provided on the valve box 100, and the connecting bolt can pass through both the through hole of the adapter plate 710 and the through hole on the valve box 100. Furthermore, by installing a connecting nut at the end of the connecting bolt away from the nut, the connection stability between any valve box 100 and the adapter plate 710 is further improved. The connecting bolt and the connecting nut form a threaded connector 510. Additionally, since the valve box 100 also needs to be connected to the power end 900, when multiple valve boxes 100 are connected via the adapter plate 710, a fixed connection between the valve box 100 and the power end 900 can be indirectly established using the adapter plate 710 and the power end 900.

[0088] As described above, when multiple mounting cavities 110 are provided on the hydraulic end, each mounting cavity 110 needs to be provided with a second liquid inlet channel 171 and a second liquid outlet channel 161. In order to facilitate the connection between the hydraulic end and the external pipeline, the multiple second liquid inlet channels 171 and multiple second liquid outlet channels 161 provided on the hydraulic end can be distributed relatively regularly. For example, the second liquid inlet channels 171 can be provided directly above each mounting cavity 110, so that the multiple second liquid inlet channels 171 can be arranged at intervals along the distribution direction of the multiple mounting cavities 110. In this case, the liquid inlet manifold 730 can be connected to the multiple second liquid inlet channels 171 at the same time, so that the sucked liquid can be transported to the multiple second liquid inlet channels 171 together through the liquid inlet manifold 730. Of course, another second liquid inlet channel 171 can be further provided below each mounting cavity 110, and multiple second liquid inlet channels 171 located below the mounting cavity 110 can also be interconnected through another liquid inlet manifold 730 to improve the liquid inlet efficiency and improve the space utilization of the valve box 100.

[0089] To minimize the volume and weight of the entire hydraulic end and to ensure its relatively regular shape for ease of transportation and installation, in one specific embodiment of this application, multiple mounting cavities 110 can be arranged in a straight line, and their opposite ends can be flush in the extending direction of the mounting cavities 110, i.e., in the axial direction of the valve seat 200. For example... Figure 16 and Figure 18 As shown, in a specific embodiment of this application, any valve box 100 may be provided with one or more mounting cavities 110, and each mounting cavity 110 is disposed through the valve box 100 along the axial direction of the valve seat 200. The multiple mounting cavities 110 are distributed in a direction perpendicular to the axial direction of the valve seat 200. Specifically, the distribution direction of the multiple mounting cavities 110 can be a third direction. In this embodiment, the third direction can be perpendicular to the first direction (i.e., the axial direction of the valve seat 200). Furthermore, any two of the first direction, the second direction, and the third direction are perpendicular to each other. This maximizes the regularity of the hydraulic end's shape and minimizes the overall volume of the hydraulic end. In this case, the inlet manifold 730 and the flow collector 720 can both extend along the third direction to make the overall shape regularity of the hydraulic end relatively good and further reduce the overall volume of the hydraulic end, improving the storage and transportation efficiency of the hydraulic end. Intuitively, the third direction can be... Figure 16 The direction Z in the middle.

[0090] Similarly, the second drainage channels 161 corresponding to each of the multiple mounting cavities 110 can also be distributed regularly. Optionally, in a specific embodiment of this application, the second drainage channel 161 can be provided at another position above each mounting cavity 110, and the multiple second drainage channels 161 are also arranged at intervals along the distribution direction of the multiple mounting cavities 110. Based on this, the hydraulic end disclosed in the embodiments of this application may also include a flow collector 720. The flow collector 720 is provided with a flow collecting cavity 721 and multiple liquid inlets. The multiple liquid inlets are distributed at intervals along the length direction of the adapter plate 710, and any liquid inlet can communicate with the corresponding second drainage channel 161, so that the liquid discharged through the multiple second drainage channels 161 can be collected into the flow collecting cavity 721 of the flow collector 720.

[0091] Meanwhile, to facilitate the transport of liquid in the manifold 720, in this embodiment, a drain port can be provided at one end of the manifold 721, and a discharge flange 320 can be installed at the drain port using fasteners 520. The discharge flange 320 can be connected to a corresponding flexible or rigid manifold to pump the liquid to the desired location. In addition, a tee 360 ​​can be provided at the other end of the manifold 721 to further improve the controllability of the liquid transport path.

[0092] As described above, during the operation of the pump, the valve seat 200 may experience slight shaking or movement relative to the valve box 100 due to the driving effect of the liquid flow. Therefore, in order to improve the service life of the valve seat 200, in a specific embodiment of this application, the hydraulic end may also include a wear-resistant ring 640. The wear-resistant ring 640 may be sleeved outside the first sealing ring surface 211. Of course, the hardness of the wear-resistant ring 640 is greater than the hardness of the valve seat 200, and / or the wear resistance of the wear-resistant ring 640 is greater than the wear resistance of the valve seat 200. Thus, by utilizing the friction between the wear-resistant ring 640 and the cavity wall of the mounting cavity 110 of the valve box 100, the friction area between the valve seat 200 and the valve box 100 is reduced, thereby improving the service life of the valve seat 200. Of course, when a wear-resistant ring 640 is fitted over the first sealing ring surface 211 of the valve seat 200, it is also necessary to ensure that the inner side of the wear-resistant ring 640 is sealed to the first sealing ring surface 211 and that the outer side of the wear-resistant ring 640 is sealed to the valve box 100. More specifically, a first sealing element 611 can be provided between the inner side of the wear-resistant ring 640 and the first sealing ring surface 211, and a third sealing element 613 can be provided between the outer side of the wear-resistant ring 640 and the valve box 100. Furthermore, the first sealing ring surface 211 can be provided with a first annular groove 216, and the cavity wall of the mounting cavity 110 can be provided with another annular groove, so as to provide installation and limiting functions for the first sealing element 611 and the third sealing element 613 respectively, further improving the sealing reliability among the three.

[0093] As described above, the valve seat 200 is provided with an inlet valve assembly 310a and a outlet valve assembly 310b at opposite ends. Since the inlet process is driven by the suction of the plunger 400, the flow rate of the liquid in the second inlet channel 171 and the first inlet channel 220 is relatively slow when entering the area of ​​the inlet valve assembly 310a. However, during the outlet process, the liquid is pushed by the plunger 400, resulting in relatively high pressure and flow rate of the liquid in the area of ​​the outlet valve assembly 310b when it is discharged through the second outlet channel 161 to the outside of the valve box 100. Simultaneously, since the outlet valve assembly typically includes a valve body and a valve sleeve, and the valve body forms a sealed fit with the valve seat 200 through the valve sleeve, the valve sleeve is used to seal the mating surface between the valve body and the valve seat 200. Furthermore, during the outlet process, the valve sleeve is subjected to the squeezing action of the high-pressure liquid.

[0094] Therefore, if the valve is damaged, the liquid flowing into the second drain channel 161 will invade the valve and flow at high speed to the mating surface of the valve seat 200 facing the valve body, thereby eroding the mating surface of the valve seat 200 facing the valve body (i.e., the side surface where the second seat end face 214 is located). This can easily lead to damage to the valve seat 200 and cause the high-pressure chamber HP where the second drain channel 161 is located to connect with the low-pressure chamber LP where the second inlet channel 171 is located, thereby generating high and low chamber cross pressure, causing the manifold to burst, which seriously affects the personal safety of the staff.

[0095] Therefore, in one specific embodiment of this application, the hydraulic end may further include a protective plate 620. The protective plate 620 is used to protect the position of the valve seat 200 facing the contact surface between the valve seat 200 and the valve body, so as to prevent the liquid in the high-pressure chamber HP from directly eroding the valve seat 200 in the event of damage to the valve rubber of the discharge valve assembly. Of course, since the end of the valve seat 200 facing the discharge valve assembly is also provided with a second port 241 of the first drainage channel 240, in order to prevent the protective plate 620 from hindering the normal operation of the drainage of the first drainage channel 240, the protective plate 620 needs to be provided with a structure such as an avoidance opening to avoid the first drainage channel 240.

[0096] Meanwhile, to ensure that the valve seat 200 and the drain valve assembly 310b can still form a normal mating relationship when the protective plate 620 is provided on the side of the valve seat 200 facing the drain valve assembly 310b, at least one of the valve body of the drain valve assembly 310b and the valve seat 200 can be provided with a receiving groove 230 to provide installation space for the protective plate 620. Considering that the thickness and size of the valve body are usually relatively small, in order to prevent the setting of the receiving groove 230 from having a significant adverse effect on the structural strength of the valve body, in a specific embodiment of this application, the valve seat 200 can be provided with a receiving groove 230, and the receiving groove 230 is recessed relative to the second seat end face 214. As above, the valve seat 200 can also be provided with a second mating concave surface 2. 52. In this case, the receiving groove 230 can be located in the central area of ​​the second mating concave surface 252, and the receiving groove 230 can be further recessed relative to the second mating concave surface 252. The second port 241 of the first drain channel 240, that is, the end of the first drain channel 240 away from the first seat end face 213, is connected to the receiving groove 230. In other words, the first seat end face 213 is connected to the receiving groove 230 through the first drain channel 240. That is, the first drain channel 240 extends from the first seat end face 213 to the receiving groove 230, ensuring that the liquid flowing out through the first drain channel 240 can flow through the receiving groove 230 to the area where the drain valve assembly 310b is located, and finally be discharged to the outside of the valve box 100 through the second drain channel 161.

[0097] More in detail, such as Figure 9 As shown, the protective plate 620 includes a bridging portion 621 and at least one shielding rib 622. Each shielding rib 622 is connected to the outside of the bridging portion 621. That is, in the hydraulic end disclosed in the embodiments of this application, the bridging portion 621 is used to provide assembly for the shielding rib 622. Of course, when there is only one shielding rib 622, there may be no obvious boundary between the bridging portion 621 and the shielding rib 622 in terms of structure. However, when there are multiple shielding ribs 622, the portion located at the center of the multiple shielding ribs 622 can be the bridging portion 621.

[0098] After the protective plate 620 is installed in the receiving groove 230, the main protective function for the valve seat 200 is provided by the shielding rib 622. Therefore, the shielding rib 622 needs to avoid the first drainage channel 240. That is, in the circumferential direction of the connecting side 215, that is, in the axial direction around the valve seat 200, the shielding rib 622 is sandwiched between the first drainage channels 240. Of course, if there is only one first drainage channel 240 on the valve seat 200, the number of shielding ribs 622 can also be one, and the shielding rib 622 extends from one side of the first drainage channel 240 to the other side. For example, if the angle spanned by the first drainage channel 240 in the axial direction around the valve seat 200 is 90°, then the angle spanned by the shielding rib 622 can be 270°. In addition, in the above embodiments, the valve seat 200 may be provided with a plurality of first drainage channels 240. In this case, the number of shielding ribs 622 may also be a plurality, and the first drainage channels 240 and shielding ribs 622 are alternately distributed in the axial direction surrounding the valve seat 200, so that each shielding rib 622 can shield the area of ​​the second port 241 in the valve seat 200 where no first drainage channel 240 is provided.

[0099] Specifically, the protective plate 620 can be made of metal. To further improve the protective effect of the protective plate 620, in another embodiment of this application, the hardness of the protective plate 620 can be greater than the hardness of the valve seat 200, and / or the wear resistance of the protective plate 620 can be greater than the wear resistance of the valve seat 200. In this case, the service life of the protective plate 620 can be further improved, thereby further enhancing the protective effect of the protective plate 620 on the valve seat 200.

[0100] More specifically, in one embodiment of this application, the material forming the protective plate 620 may include at least one of zirconium oxide, nickel-based tungsten carbide, cobalt-based tungsten carbide, titanium carbide, boron nitride, and ceramics. This makes the protective plate 620 relatively low in cost and relatively easy to process while having relatively high strength and wear resistance.

[0101] As described above, the bridging portion 621 is located in the central region of the shielding rib 622. Optionally, the bridging portion 621 is a plate-shaped, non-perforated structure, meaning that the opposite sides of the bridging portion 621 cannot communicate with each other. Since the mating surface between the valve body in the drain valve assembly 310b and the valve seat 200 cannot directly extend to the center of the valve seat 200, in another embodiment of this application, a through hole 621a can be provided in the center of the bridging portion 621. The presence of the through hole 621a does not significantly compromise the overall shielding effectiveness of the protective plate 620. The through hole 621a can be a circular hole, and it extends through the bridging portion 621 along its thickness direction. In this case, on the one hand, it facilitates the processing and transportation of the entire protective plate 620; on the other hand, it reduces the weight of the entire protective plate 620, thereby appropriately reducing the weight of the entire hydraulic end.

[0102] In addition, in the above embodiments, the valve seat 200 may also be provided with a second mating concave surface 252, which is recessed relative to the second seat end face 214. The valve body of the drain valve assembly 310b can be fitted with the second mating concave surface 252. When the valve seat 200 is provided with a receiving groove 230, the second mating concave surface 252 is connected between the second seat end face 214 and the receiving groove 230. Therefore, during the formation of the second mating concave surface 252, the extension position and extension direction of the second mating concave surface 252 can be designed so that when the second mating concave surface 252 extends to the side where the receiving groove 230 is located, it can face the shielding rib 622 of the protective plate 620. Thus, when the valve rubber of the drain valve assembly 310b is damaged, causing the liquid in the high-pressure chamber to erode along the second mating concave surface 252 towards the location of the receiving groove 230, the second mating concave surface 252 can be used to guide the high-pressure liquid to mainly erode the area where the shielding rib 622 of the protective plate 620 is located, thereby further improving the service life of the valve seat 200 and enhancing the safety of the entire pump.

[0103] As described above, the protective plate 620 can be installed in the receiving groove 230. Optionally, the protective plate 620 can be fixedly connected to the valve seat 200 through threaded connectors or other devices. In order to reduce the installation difficulty of the protective plate 620 and minimize the number of blind holes or through holes on the valve seat 200 to prevent adverse effects on the structural strength of the valve seat 200, in another embodiment of this application, the protective plate 620 can be interference-fitted with the receiving groove 230.

[0104] Specifically, the outer edge of the shielding rib 622 in the protective plate 620, away from the bridging portion 621, can be pressed against the inner wall of the receiving groove 230 to ensure that the protective plate 620 can form a relatively stable assembly relationship with the valve seat 200. In another embodiment of this application, such as Figure 11As shown, the protective plate 620 can also include a circumferential connecting portion 623, which is arranged around the outer periphery of the shielding rib 622, and the outer edge of each shielding rib 622 is fixedly connected to the inner edge of the circumferential connecting portion 623. In this case, the structural stability of the shielding rib 622 is relatively stronger, preventing the shielding rib 622 from bending or breaking during transportation, and further improving the structural stability of the protective plate 620.

[0105] Of course, during the processing of the protective plate 620, the bridging portion 621, the shielding rib 622, and the circumferential connecting portion 623 can be integrally formed. This can further improve the structural stability of the entire protective plate 620 and reduce the processing difficulty of the protective plate 620. Furthermore, when the protective plate 620 includes the circumferential connecting portion 623, the circumferential connecting portion 623 can be used to press against the groove sidewall 232 of the receiving groove 230, so that the entire protective plate 620 can form an interference fit with the receiving groove 230. This ensures a more reliable fixed assembly relationship between the protective plate 620 and the valve seat 200. Compared with directly pressing the shielding rib 622 against the receiving groove 230, the technical solution disclosed in this application can prevent the shielding rib 622 from bending, deforming, or even breaking during the pressing process with the receiving groove 230, thereby improving the service life and protective effect of the protective plate 620.

[0106] Furthermore, when the protective plate 620 includes a circumferential connecting portion 623, the diameter or other dimensions of the receiving groove 230 can be appropriately increased to prevent the circumferential connecting portion 623 from obstructing the first drainage channel 240. That is, in this embodiment, in the radial direction of the valve seat 200, the second port 241 of any first drainage channel 240 is spaced apart from the groove sidewall 232 of the receiving groove 230, wherein the radial direction of the valve seat 200 is perpendicular to its axial direction, and the spacing between the first drainage channel 240 and the groove sidewall 232 of the receiving groove 230 can be determined based on parameters such as the radial dimension of the circumferential connecting portion 623.

[0107] To further prevent the protective plate 620 from being deformed or even damaged by pressure during installation, in another embodiment of this application, the valve seat 200 can include a separately formed seat body 200a and a bushing 200b. The seat body 200a has a recess and a first seat end face 213, and the recess includes the aforementioned receiving groove 230. Specifically, in the hydraulic end disclosed in this application embodiment, in addition to the receiving groove 230, the outer side of the receiving groove 230 is further hollowed out to utilize the recess to simultaneously accommodate both the bushing and the protective plate 620. Of course, the seat body 200a also has other structures such as a first drainage channel 240.

[0108] More specifically, the bushing 200b is located on the side of the protective plate 620 opposite to the first seat end face 213. The side of the bushing 200b opposite to the protective plate 620 has the aforementioned second mating concave surface 252, so that the valve seat 200 can still mate with the discharge valve assembly using the second mating concave surface 252 on the bushing 200b. At the same time, the bushing 200b is interference-fitted with the receiving groove 230 to position the protective plate 620 and the valve seat 200 in the axial direction of the valve seat 200. The bushing 200b has a ring-shaped structure, and the inner diameter of the bushing 200b can be appropriately increased according to actual needs to ensure that the bushing does not interfere with or obstruct the drainage process of the valve seat.

[0109] In this embodiment, the bushing 200b provides positioning for the protective plate 620, thereby allowing the radial dimension of the protective plate 620 to be slightly smaller than the radial dimension of the receiving groove 230. This ensures that the protective plate 620 will not be squeezed against the valve seat during installation, thus guaranteeing high structural stability and service life for the protective plate 620. Correspondingly, the radial dimension of the bushing 200b can be designed to form an interference fit with the receiving groove 230 during installation, ensuring that the bushing 200b provides good positioning for the protective plate 620.

[0110] It should be noted that the aforementioned receiving groove 230, protective plate 620, and bushing 200b are not necessarily circular structures. The radial dimensions mentioned above are merely for the purpose of describing the shape and assembly relationship of the above structures. In other embodiments of this application, the receiving groove 230, protective plate 620, and bushing 200b can also be rectangular or other irregular shapes. Of course, in order to facilitate processing and to maximize the protective coverage of the protective plate 620, the receiving groove 230, protective plate 620, and bushing 200b can all be circular or approximately circular structures.

[0111] In the hydraulic end, when the protective plate 620 has a bushing 200b on the side opposite to the first end face 213 of the valve seat 200, the structure that directly cooperates with the drain valve assembly 310b can still be the valve seat 200. In this case, the radial dimension of the valve seat 200 may be too large, which is not conducive to the miniaturization of the pump, or the radial dimension of the bushing 200b may be too small, which will reduce the positioning effect of the bushing 200b. To address the aforementioned issues, in another embodiment of this application, the bushing 200b can directly mate with the drain valve assembly 310b. Furthermore, to increase the contact area between the bushing 200b and the valve body of the drain valve assembly 310b, a second mating concave surface 252 can be provided on the side of the bushing 200b facing away from the protective plate 620. The second mating concave surface 252 is recessed relative to the second seat end face 214, allowing it to mate with the valve body (and valve rubber) of the drain valve assembly 310b. During the liquid inlet process, the drain valve assembly 310b and the second mating concave surface 252 of the bushing 200b are sealed together.

[0112] Furthermore, if the discharge pressure at the hydraulic end is not excessive, the aforementioned protective plate 620 may not be required on the discharge side of the valve seat. In this case, such as Figure 20 and Figure 21 As shown, the first drainage channel 240 provided on the valve seat 200 can extend from the first seat end face 213 to the second mating concave surface 252, so that under the action of the second mating concave surface 252, the contact area between the valve seat 200 and the drainage valve assembly can be increased, thereby improving the stability of the sealing relationship between the two.

[0113] Based on the hydraulic end disclosed in any of the above embodiments, such as Figure 22 As shown in the illustration, this application also discloses a pump, which includes any of the aforementioned hydraulic ends. Of course, the pump may also include a power end 900 and other mechanisms such as a reduction gear mechanism; for the sake of brevity, these will not be described in detail here.

[0114] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A valve seat, characterized in that, The valve seat has a first end face (213), a second end face (214), and a connecting side (215). In the axial direction of the valve seat, the first end face (213) and the second end face (214) are located at opposite ends of the valve seat and are connected to each other through the connecting side (215). The valve seat is provided with a first liquid inlet channel (220), and the first port (221) of the first liquid inlet channel (220) is located on the connecting side (215). The connecting side (215) includes a first sealing ring surface (211) and a second sealing ring surface (212). The first sealing ring surface (211) is located between the first port (221) and the first seat end face (213), and the second sealing ring surface (212) is located between the first port (221) and the second seat end face (214). The axis of the first sealing ring surface (211) and the axis of the second sealing ring surface (212) are collinear.

2. The valve seat according to claim 1, characterized in that, There are multiple first liquid inlet channels (220), and the first port (221) of each of the multiple first liquid inlet channels (220) is located on the connecting side (215), and the multiple first ports (221) are distributed circumferentially along the connecting side (215).

3. The valve seat according to claim 1, characterized in that, The valve seat is provided with a first drain channel (240), and the side where the first seat end face (213) is located and the side where the second seat end face (214) is located are connected through the first drain channel (240), and the first drain channel (240) does not intersect with the first inlet channel (220).

4. The valve seat according to claim 3, characterized in that, The number of the first drainage channels (240) is multiple, and the multiple first drainage channels (240) are distributed circumferentially at intervals along the connecting side (215).

5. The valve seat according to claim 1, characterized in that, The valve seat has a first mating concave surface (251), which is recessed relative to the first seat end face (213).

6. The valve seat according to claim 1, characterized in that, The valve seat has a second mating concave surface (252), which is recessed relative to the second seat end face (214).

7. A hydraulic end, characterized in that, The device includes a valve box (100) and a valve seat (200) as described in any one of claims 1-6. The valve box (100) is provided with a second liquid inlet channel (171). The valve seat (200) is installed in the valve box (100), and the first liquid inlet channel (220) is connected to the second liquid inlet channel (171).

8. The hydraulic end according to claim 7, characterized in that, The hydraulic end also includes an adapter plate (710), and there are multiple valve boxes (100). The multiple valve boxes (100) are distributed along the length direction of the adapter plate (710) and are all fixedly connected to the adapter plate (710).

9. The hydraulic end according to claim 7, characterized in that, The hydraulic end also includes a wear-resistant ring (640), which is sleeved outside the first sealing ring surface (211). The inner side of the wear-resistant ring (640) is sealed to the first sealing ring surface (211), and the outer side of the wear-resistant ring (640) is sealed to the valve box (100).

10. A pump, characterized in that, Includes the hydraulic end as described in any one of claims 7-9.

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