Semi-split type L-shaped fluid end assembly

Abstract

The utility model relates to the technical field of fluid ends, and provides a semi-split type L-shaped fluid end assembly which is characterized in that a containing cavity and a discharge valve cavity are formed in a discharge cylinder body; the discharge valve core is arranged in the discharge valve cavity in a lifting manner, and is in contact sealing with the bottom of the discharge valve cavity after descending; the number of the suction cylinder bodies is multiple, suction valve cavities are formed in the suction cylinder bodies, the suction valve cavities are communicated with the suction pipe and the containing cavity at the same time, the suction cylinder bodies are detachably connected with the suction pipe, and the suction cylinder bodies are detachably connected with the discharging cylinder body. The suction valve element is arranged in the suction valve cavity in a lifting mode, after the suction valve element ascends, the suction valve element is used for being separated from the bottom of the suction valve cavity, and the suction valve cavity communicates with the suction pipe. By means of the technical scheme, the problems that an integral L-shaped hydraulic cylinder is low in material utilization rate and difficult to machine, and the whole body needs to be scrapped when part of the hydraulic cylinder is damaged in the prior art are solved. The problems that a split liquid cylinder needs to be provided with an independent discharge pipe, the structure is complex, multiple leakage points exist, and cost is high are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydraulic end, specifically, relate to a half split type L type hydraulic end assembly. BACKGROUND

[0002] The common hydraulic end in market can be divided into I type hydraulic cylinder and L type hydraulic cylinder according to type, and can be divided into integral type hydraulic cylinder and split type hydraulic cylinder according to structure. The suction valve assembly and the exhaust valve assembly of I type hydraulic cylinder are arranged vertically up and down, and the suction valve assembly cannot be disassembled alone. The suction valve assembly and the exhaust valve assembly of L type hydraulic cylinder are staggered front and back, and each valve assembly can be disassembled alone. The integral type hydraulic cylinder can integrate the exhaust pipeline. The split type hydraulic cylinder needs independent exhaust pipeline. The integral type L type hydraulic cylinder is compact in structure and convenient to maintain, but the material utilization rate is low, processing is difficult, and the whole part is scrapped when part is damaged. SUMMARY

[0003] The utility model provides a half split type L type hydraulic end assembly, solve the problem of integral type L type hydraulic cylinder material utilization rate low, processing is difficult, and the whole part is scrapped when part is damaged in relevant technology.

[0004] The technical scheme of the utility model is as follows: a half split type L type hydraulic end assembly, the key lies in: including,

[0005] Suction pipe,

[0006] Exhaust cylinder, the exhaust cylinder is located one side of the suction pipe, the exhaust cylinder has containing cavity and exhaust valve cavity in, the exhaust valve cavity is communicated with the containing cavity;

[0007] Exhaust valve core, the exhaust valve core is arranged in the exhaust valve cavity and is lifted, after the exhaust valve core drops, it is used for with the bottom of exhaust valve cavity contact seal, blocks the place of communication of exhaust valve cavity and containing cavity;

[0008] Suction cylinder, the suction cylinder is located between the suction pipe and the exhaust cylinder, the number of suction cylinder is multiple, all suction cylinder is arranged along the length direction of exhaust cylinder, the suction cylinder has suction valve cavity, the suction valve cavity is communicated with the suction pipe and containing cavity simultaneously, the suction cylinder and the suction pipe are detachably connected, the suction cylinder and the exhaust cylinder are detachably connected;

[0009] Suction valve core, the suction valve core is arranged in the suction valve cavity and is lifted, after the suction valve core rises, it is used for with the bottom of suction valve cavity separates, the suction valve cavity is communicated with the suction pipe.

[0010] As a further technical solution, for example, the semi-split L-shaped hydraulic end assembly provided by at least one embodiment of the present disclosure further comprises,

[0011] A cylinder sleeve is arranged on the exhaust cylinder body and located on the side of the exhaust cylinder body away from the suction cylinder body, and the cylinder sleeve is in communication with the containing cavity.

[0012] A piston is located inside the cylinder sleeve and in sliding seal with the cylinder sleeve.

[0013] A piston rod is connected with the piston, and after the piston rod drives the piston to move away from the suction cylinder body, the suction valve core rises to be separated from the bottom of the suction valve cavity, and the exhaust valve core is used to be in contact seal with the bottom of the exhaust valve cavity.

[0014] As a further technical solution, for example, the semi-split L-shaped hydraulic end assembly provided by at least one embodiment of the present disclosure further comprises a cylinder seat arranged on the periphery of the cylinder sleeve and abutting against the outer wall of the exhaust cylinder body, and the cylinder sleeve is arranged on the exhaust cylinder body by means of the cylinder seat, and the cylinder seat is detachably connected with the exhaust cylinder body.

[0015] As a further technical solution, for example, the semi-split L-shaped hydraulic end assembly provided by at least one embodiment of the present disclosure comprises a plurality of exhaust valve cavities, and all the exhaust valve cavities are arranged at intervals along the exhaust cylinder body, and adjacent exhaust valve cavities are in communication.

[0016] As a further technical solution, for example, the semi-split L-shaped hydraulic end assembly provided by at least one embodiment of the present disclosure comprises a suction valve port on the top of the suction cylinder body, and the suction valve port is in communication with the suction valve cavity, and further comprises,

[0017] A suction valve gland is arranged at the suction valve port, and the suction valve gland is detachably connected with the suction cylinder body.

[0018] A suction valve cover is arranged at the suction valve port and located between the suction valve gland and the suction valve cavity, and the suction valve cover is in contact with the suction valve gland.

[0019] A suction valve rod is located in the suction valve cavity, and the suction valve core is arranged at the lower end of the suction valve rod, and the upper end of the suction valve rod is inserted into the suction valve cover to form a sliding fit.

[0020] A suction spring is sleeved on the periphery of the suction valve rod, one end of the suction spring is connected with the suction valve cover, and the other end of the suction spring is connected with the suction valve core, so as to make the suction valve core descend and reset to be in contact with the bottom of the suction valve cavity.

[0021] As a further technical solution, for example, the semi-split L-shaped hydraulic end assembly provided by at least one embodiment of the present disclosure has a suction receiving boss at the suction valve port, and the upper end of the suction valve cover has a suction resting protrusion which is lapped with the suction receiving boss.

[0022] As a further technical solution, for example, the semi-split L-shaped hydraulic end assembly provided by at least one embodiment of the present disclosure has a suction receiving boss at the suction valve port, and the upper end of the suction valve cover has a suction resting protrusion which is lapped with the suction receiving boss.

[0023] As a further technical solution, for example, the semi-split L-shaped hydraulic end assembly provided by at least one embodiment of the present disclosure has a suction receiving boss at the suction valve port, and the upper end of the suction valve cover has a suction resting protrusion which is lapped with the suction receiving boss.

[0024] A discharge pressure cover is arranged at the discharge valve port, and the discharge pressure cover is detachably connected with the discharge cylinder;

[0025] A discharge valve cover is arranged at the discharge valve port and located between the discharge pressure cover and the discharge valve cavity, and the discharge valve cover is in contact with the discharge pressure cover;

[0026] A discharge valve rod is located in the discharge valve cavity, the discharge valve core is arranged at the lower end of the discharge valve rod, and the upper end of the discharge valve rod is inserted into the discharge valve cover and forms a sliding fit;

[0027] A discharge spring is sleeved on the periphery of the discharge valve rod, one end of the discharge spring is connected with the discharge valve cover, and the other end of the discharge spring is connected with the discharge valve core, so as to make the discharge valve core descend and reset to be in contact with the bottom of the discharge valve cavity.

[0028] As a further technical solution, for example, the semi-split L-shaped hydraulic end assembly provided by at least one embodiment of the present disclosure has a suction receiving boss at the suction valve port, and the upper end of the suction valve cover has a suction resting protrusion which is lapped with the suction receiving boss.

[0029] As a further technical solution, for example, the semi-split L-shaped hydraulic end assembly provided by at least one embodiment of the present disclosure has a discharge cylinder body with a discharge accommodating groove inside the discharge cylinder body, the discharge accommodating groove is located below the discharge receiving boss, and further comprises a discharge sealing ring, the discharge sealing ring is sleeved on the periphery of the discharge valve cover and located in the discharge accommodating groove.

[0030] The working principle and beneficial effects of the utility model are as follows: the discharge cylinder body is located on one side of the suction pipe, the discharge cylinder body has a containing cavity and a discharge valve cavity, the discharge valve cavity is in communication with the containing cavity; the discharge valve core is arranged to ascend and descend in the discharge valve cavity, after the discharge valve core descends, it is used to contact and seal the bottom of the discharge valve cavity, and block the communication part of the discharge valve cavity and the containing cavity; the suction cylinder body is located between the suction pipe and the discharge cylinder body, the number of the suction cylinder bodies is multiple, all the suction cylinder bodies are arranged along the length direction of the discharge cylinder body, the suction cylinder body has a suction valve cavity, the suction valve cavity is in communication with the suction pipe and the containing cavity at the same time, the suction cylinder body and the suction pipe are detachably connected, and the suction cylinder body and the discharge cylinder body are detachably connected; the suction valve core is arranged to ascend and descend in the suction valve cavity, after the suction valve core ascends, it is used to separate from the bottom of the suction valve cavity, and the suction valve cavity is in communication with the suction pipe.

[0031] The layout mode of arranging multiple suction cylinder bodies along the length direction of the discharge cylinder body between the suction pipe and the discharge cylinder body can reasonably utilize the space, so that the overall structure is compact. The detachable connection between the suction cylinder body and the discharge cylinder body and between the suction cylinder body and the suction pipe enables each component to be individually detached, compared with the integral L-shaped hydraulic cylinder, the components can be individually replaced during maintenance, without the need for overall scrapping, which can reduce resource waste, greatly reduce maintenance cost and difficulty, and make maintenance more convenient and fast. The integral L-shaped hydraulic cylinder is difficult to process due to complex structure, while the semi-split structure and relatively simple connection mode adopted by the utility model can improve material utilization rate, reduce processing difficulty, improve production efficiency, and save manufacturing cost to a certain extent. The problems of complex structure, multiple leakage points, and high cost of the split hydraulic cylinder with independent discharge pipe can also be solved.

[0032] When the volume of the containing cavity increases, the pressure in the cavity decreases, at this time the discharge valve core contacts and seals with the bottom of the discharge valve cavity, blocking the communication between the discharge valve cavity and the containing cavity, the suction valve core rises and separates from the bottom of the suction valve cavity, making the suction valve cavity communicate with the suction pipe, and the liquid enters the suction valve cavity through the suction pipe under the action of the pressure difference, and then enters the containing cavity. When the volume of the containing cavity decreases, the pressure in the cavity increases, at this time the discharge valve core rises and separates from the bottom of the discharge valve cavity, making the discharge valve cavity communicate with the containing cavity, the suction valve core descends and contacts and seals with the bottom of the suction valve cavity, making the suction valve cavity be blocked with the suction pipe, and the high-pressure liquid in the containing cavity is discharged through the discharge valve cavity. When the volume of the containing cavity increases again, the liquid is sucked into the containing cavity again, and when the volume of the containing cavity decreases again, the high-pressure liquid in the containing cavity is discharged again. Thus, the structure is simple and convenient to use. BRIEF DESCRIPTION OF DRAWINGS

[0033] The above-mentioned characteristics, technical features, advantages and implementation modes of the present application will be further described in the following manner in combination with the preferred embodiments and the accompanying drawings.

[0034] Figure 1 It is a front view of the present application.

[0035] Figure 2 It is a schematic view of the connection structure of the suction valve core and the suction cylinder body in the present application.

[0036] Figure 3 It is Figure 2 It is an enlarged view of A in the present application.

[0037] Figure 4 It is a schematic view of the connection structure of the discharge valve core and the discharge cylinder body in the present application.

[0038] Figure 5 It is Figure 4 It is an enlarged view of B in the present application.

[0039] Figure 6 It is a left view of the present application.

[0040] In the drawings: 1, suction pipe, 2, discharge cylinder body, 3, discharge valve core, 4, suction cylinder body, 5, suction valve core, 6, containing cavity, 7, discharge valve cavity, 8, suction valve cavity, 9, cylinder sleeve, 10, piston, 11, piston rod, 12, cylinder base, 13, suction valve port, 14, suction gland, 15, suction valve cover, 16, suction valve rod, 17, suction elastic member, 18, suction receiving boss, 19, suction placing convex edge, 20, suction receiving groove, 21, suction sealing ring, 22, discharge valve port, 23, discharge gland, 24, discharge valve cover, 25, discharge valve rod, 26, discharge elastic member, 27, discharge receiving boss, 28, discharge placing convex edge, 29, discharge receiving groove, 30, discharge sealing ring. DETAILED DESCRIPTION

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0042] In order to make the drawing simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0043] In this paper, it is necessary to point out that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0045] Embodiments, with reference to Figures 1-6For an embodiment of the utility model, propose a kind of half split L type hydraulic end assembly, including suction pipe 1, discharge cylinder 2, discharge valve core 3, suction cylinder 4, suction valve core 5, discharge cylinder 2 is located suction pipe 1 side, discharge cylinder 2 has accommodating cavity 6 and discharge valve cavity 7 in it, discharge valve cavity 7 is communicated with accommodating cavity 6;Discharge valve core 3 is arranged in discharge valve cavity 7, discharge valve core 3 is lowered, for with the bottom of discharge valve cavity 7 contact seal, block the communication of discharge valve cavity 7 and accommodating cavity 6;Suction cylinder 4 is located between suction pipe 1 and discharge cylinder 2, the number of suction cylinder 4 is multiple, all suction cylinder 4 is arranged along the length direction of discharge cylinder 2, suction cylinder 4 has suction valve cavity 8, suction valve cavity 8 is simultaneously communicated with suction pipe 1 and accommodating cavity 6, detachable connection between suction cylinder 4 and suction pipe 1, detachable connection between suction cylinder 4 and discharge cylinder 2;Suction valve core 5 is arranged in suction valve cavity 8, suction valve core 5 is raised, for with the bottom of suction valve cavity 8 separation, suction valve cavity 8 is communicated with suction pipe 1.

[0046] In the embodiment, with suction cylinder 4 being located above suction pipe 1, discharge cylinder 2 is located on the right side of suction cylinder 4, for example, the bottom of the suction valve cavity 8 of each suction cylinder 4 is communicated with the suction pipe 1, and the right side of the suction valve cavity 8 is communicated with the accommodating cavity 6. The front and rear ends of the suction pipe 1 are closed ends, and the middle part of the left side of the suction pipe 1 is connected with a flange plate, which facilitates connection with other equipment. The plurality of suction cylinders 4 are arranged along the length direction (i.e., the front-rear direction) of the discharge cylinder 2 between the suction pipe 1 and the discharge cylinder 2, which can reasonably utilize space and make the overall structure compact. The detachable connection between the suction cylinder 4 and the discharge cylinder 2 and between the suction cylinder 4 and the suction pipe 1 enables each component to be individually disassembled, compared with the integral "L" type hydraulic cylinder, which can be individually replaced during maintenance without the need for overall scrapping, can reduce resource waste, can greatly reduce maintenance cost and difficulty, and maintenance is more convenient and fast. The integral "L" type hydraulic cylinder is difficult to process due to complex structure, while the half split structure and relatively simple connection method adopted by the utility model can improve material utilization rate, reduce processing difficulty, improve production efficiency, and save manufacturing cost to some extent. It can also solve the problems of complex structure, multiple leakage points and high cost of split hydraulic cylinder. The suction cylinder 4 and the suction pipe 1 are connected by bolts, and the suction cylinder 4 and the discharge cylinder 2 are also connected by bolts, which is firm and reliable in connection, convenient and fast in disassembly and assembly, time-saving and labor-saving.

[0047] When the volume of the receiving cavity 6 increases, the pressure inside the cavity decreases. At this time, the discharge valve core 3 contacts and seals the bottom of the discharge valve chamber 7, blocking the connection between the discharge valve chamber 7 and the receiving cavity 6. The suction valve core 5 rises and separates from the bottom of the suction valve chamber 8, connecting the suction valve chamber 8 with the suction pipe 1. Under the action of the pressure difference, the liquid enters the suction valve chamber 8 through the suction pipe 1 and then enters the receiving cavity 6. When the volume of the receiving cavity 6 decreases, the pressure inside the cavity increases. At this time, the discharge valve core 3 rises and separates from the bottom of the discharge valve chamber 7, connecting the discharge valve chamber 7 with the receiving cavity 6. The suction valve core 5 descends and contacts and seals the bottom of the suction valve chamber 8, blocking the connection between the suction valve chamber 8 and the suction pipe 1. The high-pressure liquid in the receiving cavity 6 is discharged through the discharge valve chamber 7. When the volume of the receiving cavity 6 increases again, the liquid is drawn into the receiving cavity 6 again. When the volume of the receiving cavity 6 decreases again, the high-pressure liquid in the receiving cavity 6 is discharged again. This process can be repeated, resulting in a simple structure and convenient use.

[0048] Furthermore, such as Figure 1 As shown, it also includes a cylinder liner 9, a piston 10, and a piston rod 11. The cylinder liner 9 is disposed on the discharge cylinder 2 and is located on the side of the discharge cylinder 2 away from the suction cylinder 4. The cylinder liner 9 is connected to the receiving cavity 6. The piston 10 is located inside the cylinder liner 9 and is slidably sealed with the cylinder liner 9. The piston rod 11 is connected to the piston 10. After the piston rod 11 drives the piston 10 to move away from the suction cylinder 4, the suction valve core 5 rises to separate from the bottom of the suction valve cavity 8, and the discharge valve core 3 is used to contact and seal with the bottom of the discharge valve cavity 7. After the piston rod 11 drives the piston 10 to move towards the suction cylinder 4, the discharge valve core 3 rises to separate from the bottom of the discharge valve cavity 7.

[0049] Taking the example of the suction cylinder 4 located to the left of the discharge cylinder 2 and the cylinder liner 9 located to the right of the discharge cylinder 2, the left end of the cylinder liner 9 is connected to the receiving cavity 6, and the right end is closed. When the piston rod 11 drives the piston 10 to move away from the suction cylinder 4 (i.e., to the right), the volume of the receiving cavity 6 increases and the pressure decreases, causing the suction valve core 5 to rise and separate from the bottom of the suction valve chamber 8. At this time, the discharge valve core 3 contacts and seals with the bottom of the discharge valve chamber 7. When the piston rod 11 drives the piston 10 to move towards the suction cylinder 4 (i.e., to the left), the volume of the receiving cavity 6 decreases and the pressure increases, causing the discharge valve core 3 to rise and the suction valve core 5 to fall and contact and seal with the bottom of the suction valve chamber 8. By changing the direction of movement of the piston rod 11, the volume of the receiving cavity 6 can be changed, thereby driving the suction and discharge of liquid. The structure is simple and the operation is convenient.

[0050] Furthermore, such as Figure 1As shown, the cylinder seat 12 is arranged outside the cylinder sleeve 9 and abuts against the outer wall of the exhaust cylinder 2. The cylinder sleeve 9 is arranged on the exhaust cylinder 2 by means of the cylinder seat 12, and the cylinder seat 12 is detachably connected with the exhaust cylinder 2. The cylinder seat 12 can increase the connecting area of the cylinder sleeve 9 and the exhaust cylinder 2, and the cylinder sleeve 9 is stably arranged on the exhaust cylinder 2. The detachable connection facilitates disassembly and maintenance. The cylinder seat 12 and the exhaust cylinder 2 are preferably connected by bolts.

[0051] Further, the number of the exhaust valve cavities 7 is multiple, all the exhaust valve cavities 7 are arranged at intervals along the exhaust cylinder 2, and adjacent exhaust valve cavities 7 are communicated, such as Figure 1 As shown, the multiple exhaust valve cavities 7 are arranged along the front-rear direction on the exhaust cylinder 2, which can make the structure compact.

[0052] Further, as shown in Figure 1 , Figure 2 and Figure 3 , the top of the suction cylinder 4 has a suction valve port 13, the suction valve port 13 is communicated with the suction valve cavity 8, and further comprises a suction gland 14, a suction valve cover 15, a suction valve rod 16, and a suction elastic element 17. The suction gland 14 is arranged at the suction valve port 13 and is detachably connected with the suction cylinder 4. The suction valve cover 15 is arranged at the suction valve port 13 and is located between the suction gland 14 and the suction valve cavity 8, and the suction valve cover 15 is in contact with the suction gland 14. The suction valve rod 16 is located in the suction valve cavity 8, the suction valve core 5 is arranged at the lower end of the suction valve rod 16, the upper end of the suction valve rod 16 is inserted into the suction valve cover 15 and forms a sliding fit. The suction elastic element 17 is sleeved outside the suction valve rod 16, one end of the suction elastic element 17 is connected with the suction valve cover 15, and the other end of the suction elastic element 17 is connected with the suction valve core 5, which is used to make the suction valve core 5 descend and reset to be in contact with and sealed with the bottom of the suction valve cavity 8.

[0053] The lower end surface of the suction cover 14 is in contact with the upper end surface of the suction valve cover 15, which can position the suction valve cover 15. The suction valve cover 15 can guide and limit the suction valve rod 16, and the suction valve rod 16 can guide and limit the suction valve core 5. When the volume of the containing cavity 6 increases, the pressure in the containing cavity 6 decreases, causing the suction valve core 5 and the suction valve rod 16 to rise, and the suction elastic element 17 to be compressed. The lower end of the suction valve core 5 is separated from the bottom of the suction valve cavity 8, and the suction valve cavity 8 is in communication with the suction pipe 1. When the volume of the containing cavity 6 decreases, the pressure in the containing cavity 6 increases, causing the suction valve core 5 and the suction valve rod 16 to return to the initial position, and the suction elastic element 17 to extend to the initial length. The suction valve core 5 is in contact with the bottom of the suction valve cavity 8, and the suction valve cavity 8 is blocked from the suction pipe 1. The flexible lifting movement of the suction valve core 5 can be achieved, thereby controlling the communication and blocking of the suction valve cavity 8 and the suction pipe 1. The suction cover 14 is threadedly connected with the suction valve port 13, which is firm and reliable, easy to disassemble and assemble, time-saving and labor-saving.

[0054] Further, as shown in Figure 2 and Figure 3 , the suction valve port 13 has a suction receiving boss 18, and the upper end of the suction valve cover 15 has a suction resting convex edge 19. The suction resting convex edge 19 is in contact with the suction receiving boss 18, which can support and limit the suction valve cover 15, improving the stability of the suction valve cover 15.

[0055] Further, as shown in Figure 2 and Figure 3 , the suction cylinder 4 has a suction containing groove 20 below the suction receiving boss 18, and further includes a suction sealing ring 21, which is sleeved around the suction valve cover 15 and located in the suction containing groove 20. The suction sealing ring 21 can seal to prevent liquid leakage at the suction valve port 13, and can improve the sealing performance of the fluid end assembly.

[0056] Further, as shown in Figure 1 , Figure 4 and Figure 5As shown, the top of the discharge cylinder 2 has a discharge valve port 22, which is in communication with the discharge valve chamber 7, and further comprises a discharge gland 23, a discharge valve cover 24, a discharge valve rod 25, and a discharge spring 26. The discharge gland 23 is detachably connected between the discharge valve port 22 and the discharge cylinder 2. The discharge valve cover 24 is arranged at the discharge valve port 22 and between the discharge gland 23 and the discharge valve chamber 7, and is in contact with the discharge gland 23. The discharge valve rod 25 is arranged in the discharge valve chamber 7, and the discharge valve core 3 is arranged at the lower end of the discharge valve rod 25. The upper end of the discharge valve rod 25 is inserted into the discharge valve cover 24 and forms a sliding fit. The discharge spring 26 is sleeved on the outer periphery of the discharge valve rod 25, one end of the discharge spring 26 is connected with the discharge valve cover 24, and the other end of the discharge spring 26 is connected with the discharge valve core 3, so as to make the discharge valve core 3 descend and reset to be in contact with the bottom of the discharge valve chamber 7.

[0057] The lower end surface of the discharge gland 23 is in contact with the upper end surface of the discharge valve cover 24, which can position the discharge valve cover 24. The discharge valve cover 24 can guide and limit the discharge valve rod 25, and the discharge valve rod 25 can guide and limit the discharge valve core 3. When the volume of the containing chamber 6 decreases, the pressure in the containing chamber 6 increases, so that the discharge valve core 3 and the discharge valve rod 25 rise, the suction spring 17 is compressed, the discharge valve core 3 is separated from the bottom of the discharge valve chamber 7, and the discharge valve chamber 7 is in communication with the containing chamber 6. When the volume of the containing chamber 6 increases, the pressure in the containing chamber 6 decreases, so that the discharge valve core 3 and the discharge valve rod 25 descend to the initial position, the suction spring 17 also elongates to return to the initial length, the lower end of the discharge valve core 3 is in contact with the bottom of the discharge valve chamber 7, and the discharge valve chamber 7 is blocked from the containing chamber 6. The flexible lifting movement of the discharge valve core 3 can be realized, so as to control the communication and blocking of the discharge valve chamber 7 and the containing chamber 6. The discharge gland 23 is threadedly connected with the discharge valve port 22, which is firm and reliable, easy and fast to disassemble and assemble, and saves time and effort.

[0058] Further, as shown in Figure 4 and Figure 5 , the discharge valve port 22 has a discharge receiving boss 27, and the upper end of the discharge valve cover 24 has a discharge placing protrusion 28, which is lapped with the discharge receiving boss 27, so as to support and limit the discharge valve cover 24 and improve the stability of the discharge valve cover 24.

[0059] Further, as shown in Figure 4 and Figure 5As shown, the discharge cylinder 2 has a discharge containing groove 29 below the discharge receiving boss 27, and further comprises a discharge sealing ring 30 sleeved on the periphery of the discharge valve cover 24 and located in the discharge containing groove 29. The discharge sealing ring 30 can play a sealing role to prevent liquid from leaking at the discharge valve port 22, and can improve the sealing performance of the fluid end assembly.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application. They should be covered in the scope of the claims of the present application.

Claims

1. A semi-split L-type fluid end assembly, characterized by: Comprising, Suction pipe (1), Discharge cylinder (2), located on one side of the suction pipe (1), having a containing cavity (6) and a discharge valve cavity (7) in the discharge cylinder (2), the discharge valve cavity (7) communicates with the containing cavity (6); Discharge valve core (3), which is arranged in the discharge valve cavity (7), and is used to contact and seal the bottom of the discharge valve cavity (7) after descending, and block the communication between the discharge valve cavity (7) and the containing cavity (6); Suction cylinder (4), located between the suction pipe (1) and the discharge cylinder (2), the number of suction cylinders (4) is multiple, all the suction cylinders (4) are arranged along the length direction of the discharge cylinder (2), the suction cylinder (4) has a suction valve cavity (8), the suction valve cavity (8) communicates with the suction pipe (1) and the containing cavity (6) at the same time, the suction cylinder (4) is detachably connected with the suction pipe (1) and the discharge cylinder (2); Suction valve core (5), which is arranged in the suction valve cavity (8), and is used to separate from the bottom of the suction valve cavity (8) after rising, and make the suction valve cavity (8) communicate with the suction pipe (1).

2. A semi-split L-type fluid end assembly as claimed in claim 1, wherein: Also comprising, Cylinder sleeve (9), which is arranged on the discharge cylinder (2), and is located on the side of the discharge cylinder (2) away from the suction cylinder (4), and communicates with the containing cavity (6); Piston (10), which is located inside the cylinder sleeve (9), and is in sliding seal with the cylinder sleeve (9); Piston rod (11), which is connected with the piston (10), and drives the piston (10) to move away from the suction cylinder (4), so that the suction valve core (5) rises to separate from the bottom of the suction valve cavity (8), and the discharge valve core (3) is used to contact and seal the bottom of the discharge valve cavity (7); the piston rod (11) drives the piston (10) to move towards the suction cylinder (4), so that the discharge valve core (3) rises to separate from the bottom of the discharge valve cavity (7).

3. A semi-split L-type fluid end assembly as claimed in claim 2, characterized in that: Also comprising cylinder seat (12), which is arranged on the periphery of the cylinder sleeve (9), and abuts against the outer wall of the discharge cylinder (2), the cylinder sleeve (9) is arranged on the discharge cylinder (2) by means of the cylinder seat (12), and the cylinder seat (12) is detachably connected with the discharge cylinder (2).

4. A semi-split L-type fluid end assembly as claimed in claim 1, wherein: The number of discharge valve cavities (7) is multiple, all the discharge valve cavities (7) are arranged at intervals along the discharge cylinder (2), and adjacent discharge valve cavities (7) communicate.

5. A semi-split L-type fluid end assembly as claimed in claim 1, wherein: The top of the suction cylinder (4) has a suction valve port (13), which communicates with the suction valve cavity (8), and also comprises, An inhalation gland (14) is arranged at the inhalation port (13), and is detachably connected with the inhalation cylinder (4); An inhalation valve cover (15) is arranged at the inhalation port (13) and located between the inhalation gland (14) and the inhalation valve cavity (8), and is in contact with the inhalation gland (14); An inhalation valve rod (16) is located in the inhalation valve cavity (8), and the inhalation valve core (5) is arranged at the lower end of the inhalation valve rod (16), and the upper end of the inhalation valve rod (16) is inserted into the inhalation valve cover (15) and forms a sliding fit; An inhalation elastic member (17) is sleeved on the periphery of the inhalation valve rod (16), one end of the inhalation elastic member (17) is connected with the inhalation valve cover (15), and the other end of the inhalation elastic member (17) is connected with the inhalation valve core (5), so as to make the inhalation valve core (5) descend and reset to be in contact with the bottom of the inhalation valve cavity (8) for sealing.

6. A semi-split L-type fluid end assembly as claimed in claim 5, wherein: The inhalation port (13) is provided with an inhalation receiving boss (18), and the upper end of the inhalation valve cover (15) is provided with an inhalation placing convex edge (19) which is lapped with the inhalation receiving boss (18).

7. A semi-split L-type fluid end assembly as claimed in claim 6, wherein: The inhalation cylinder (4) is provided with an inhalation containing groove (20) located below the inhalation receiving boss (18), and further comprises an inhalation sealing ring (21) sleeved on the periphery of the inhalation valve cover (15) and located in the inhalation containing groove (20).

8. A semi-split L-type fluid end assembly as claimed in claim 1, wherein: The top of the exhaust cylinder (2) is provided with an exhaust valve port (22) which is in communication with the exhaust valve cavity (7), and further comprises, An exhaust gland (23) is arranged at the exhaust valve port (22), and is detachably connected with the exhaust cylinder (2); An exhaust valve cover (24) is arranged at the exhaust valve port (22) and located between the exhaust gland (23) and the exhaust valve cavity (7), and is in contact with the exhaust gland (23); An exhaust valve rod (25) is located in the exhaust valve cavity (7), and the exhaust valve core (3) is arranged at the lower end of the exhaust valve rod (25), and the upper end of the exhaust valve rod (25) is inserted into the exhaust valve cover (24) and forms a sliding fit; An exhaust elastic member (26) is sleeved on the periphery of the exhaust valve rod (25), one end of the exhaust elastic member (26) is connected with the exhaust valve cover (24), and the other end of the exhaust elastic member (26) is connected with the exhaust valve core (3), so as to make the exhaust valve core (3) descend and reset to be in contact with the bottom of the exhaust valve cavity (7) for sealing.

9. A semi-split L-type fluid end assembly as claimed in claim 8, characterized in that: The discharge valve port (22) has a discharge receiving boss (27) at the position, and the upper end of the discharge valve cover (24) has a discharge receiving protrusion (28) which is overlapped with the discharge receiving boss (27).

10. A semi-split L-type fluid end assembly as claimed in claim 9, characterized in that: The discharge cylinder (2) has a discharge receiving groove (29) inside, which is below the discharge receiving boss (27), and further comprises a discharge sealing ring (30) which is sleeved on the periphery of the discharge valve cover (24) and located in the discharge receiving groove (29).

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