Suction and discharge combination valve structure of ultrahigh-pressure ceramic valve group type plunger pump

Abstract

The utility model relates to the technical field of plunger pumps, and discloses a suction and discharge combination valve structure of an ultrahigh-pressure ceramic valve group type plunger pump, which comprises a plunger pump shell, an end cover is arranged on the side wall of the plunger pump shell, a suction channel and a discharge channel are respectively arranged on the end cover, a tungsten carbide ceramic plunger cylinder is arranged in the plunger pump shell, and the tungsten carbide ceramic plunger cylinder is arranged in the plunger pump shell. A ceramic plunger is inserted into the tungsten carbide ceramic plunger cylinder, and a suction and discharge assembly is connected between the suction channel and the discharge channel. The sealing plate is matched with the tungsten carbide ceramic plunger type cylinder, so that opening and closing of a circulation channel can be accurately controlled, one-way flowing of liquid in the suction process is guaranteed, the backflow phenomenon is effectively prevented, high efficiency and stability in the suction process are guaranteed, and meanwhile, the sealing plate is effectively prevented from being damaged. And the conical valve core plays a good role in controlling the discharge of high-pressure liquid in the discharge process, so that the discharge pressure is stable, the flow is uniform, and the working reliability of the whole pump body is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to plunger pump technical field, concretely relates to a kind of suction exhaust combination valve structure of superhigh pressure ceramic valve group type plunger pump. BACKGROUND

[0002] In petroleum chemical industry, high-pressure water jet cleaning, superhigh pressure material processing and many other industrial fields, the demand for superhigh pressure plunger pump is increasing.

[0003] The suction exhaust valve structure of conventional plunger pump exposes many problems when facing superhigh pressure working condition, on the one hand, conventional metal material valve group is prone to deformation and wear under superhigh pressure, which leads to the decline of sealing performance, resulting in liquid leakage and backflow phenomenon, which seriously affects the conveying efficiency and stability of pump. On the other hand, simple valve structure is difficult to accurately control the suction and discharge process of liquid under superhigh pressure, and cannot meet the process requirements of high-precision control of flow and pressure, which limits the quality improvement and efficiency optimization of related industrial production.

[0004] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0005] To solve the above technical problems, the basic idea of the technical scheme of the utility model is:

[0006] A kind of suction exhaust combination valve structure of superhigh pressure ceramic valve group type plunger pump, including plunger pump shell, the plunger pump shell side wall is equipped with end cap, and end cap is respectively equipped with suction passage and exhaust passage, plunger pump shell is internally installed with tungsten carbide ceramic plunger cylinder, the tungsten carbide ceramic plunger cylinder is internally inserted and connected with the ceramic plunger, and suction passage and exhaust passage are connected with suction exhaust assembly.

[0007] The suction exhaust assembly includes valve shell, the valve shell side wall is equipped with flow-through channel for communicating suction passage and the inner cavity of the inner cavity of valve shell, the inner cavity one side end face is installed with sealing plate, and sealing plate is attached to flow-through channel export, the sealing plate is equipped with the gap for communicating inner cavity and tungsten carbide ceramic plunger cylinder, the sealing plate horizontally slides in valve shell, and the conical valve core is slidably arranged in the inner cavity of valve shell, and the conical valve core is blocked in the other end of inner cavity.

[0008] As a preferred embodiment of the utility model, the input shaft is rotatably installed in the plunger pump shell, the swash plate is installed on the input shaft, the inclined surface of the swash plate is close to one side of the tungsten carbide ceramic plunger cylinder, the axial thrust bearing is installed at both ends of the swash plate, the axial thrust bearing is installed in the inner wall of the plunger pump shell, and the outer side wall of the axial thrust bearing is slidably connected with the ceramic plunger.

[0009] As an optimal implementation form of the utility model, the axial thrust bearing end face has a ceramic sliding shoe, a guide ball is slidably arranged in the ceramic sliding shoe, the guide ball and the inner wall of the ceramic sliding shoe are mutually adapted, the guide ball is connected with the end of the ceramic plunger, and a metal cladding sheet is wrapped on the outer side wall of the guide ball and is installed on the ceramic sliding shoe.

[0010] As an optimal implementation form of the utility model, a shutter is installed on the ceramic plunger, a nickel-based alloy spring is arranged on the outer wall of the tungsten carbide ceramic plunger cylinder in a sleeved mode, one end of the nickel-based alloy spring is clamped on the end face of the plunger pump shell, and the other end is clamped on the shutter.

[0011] As an optimal implementation form of the utility model, a positioning sleeve is installed at the end of the valve shell close to the ceramic sliding shoe, a sleeve pipe is slidably installed in the positioning sleeve and is connected with the sealing plate, a return spring is installed in the inner cavity of the sleeve pipe, and the other end of the return spring is clamped in the positioning sleeve.

[0012] As an optimal implementation form of the utility model, an installation cover is installed on the side wall of the discharge channel, a top block is movably and penetratively installed in the installation cover and is attached to the conical valve core, a compression spring is clamped between the installation cover and the top block, and the compression direction of the compression spring and the moving direction of the top block are on the same straight line.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The sealing plate and the tungsten carbide ceramic plunger cylinder are matched, the opening and closing of the flow channel are accurately controlled, the unidirectional flow of the liquid in the suction process is ensured, the backflow phenomenon is effectively prevented, the efficiency and stability of the suction process are ensured, meanwhile, the conical valve core plays a good control role on the discharge of the high-pressure liquid in the discharge process, the discharge pressure is ensured to be stable, the flow is uniform, and the reliability of the whole pump body work is improved.

[0015] The specific implementation manners of the utility model will be further described in detail in combination with the drawings. DRAWINGS

[0016] In the drawings:

[0017] Figure 1 It is a planar sectional view of the utility model;

[0018] Figure 2 It is a planar sectional view of the utility model; Figure 1 It is an enlarged view of A in the drawings;

[0019] Figure 3 It is a planar sectional view of the utility model; Figure 1 It is a partial enlarged view of the utility model.

[0020] In the diagram: 1. Plunger pump housing; 2. Suction passage; 3. Discharge passage; 4. End cover; 5. Input shaft; 6. Swashplate; 7. Axial thrust bearing; 8. Ceramic slipper; 9. Metal-clad sheet metal; 10. Tungsten carbide ceramic plunger cylinder; 11. Ceramic plunger; 12. Guide ball; 13. Baffle; 14. Nickel-based alloy spring; 15. Valve housing; 16. Flow passage; 17. Inner cavity; 18. Sealing plate; 19. Notch; 20. Sleeve; 21. Return spring; 22. Positioning sleeve; 23. Conical valve core; 24. Top block; 25. Compression spring; 26. Mounting cover. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0022] like Figures 1 to 3 As shown, a combined suction and discharge valve structure for an ultra-high pressure ceramic valve group plunger pump includes a plunger pump housing 1. An end cover 4 is installed on the side wall of the plunger pump housing 1, and the end cover 4 has a suction channel 2 and a discharge channel 3 respectively. A tungsten carbide ceramic plunger cylinder 10 is installed inside the plunger pump housing 1, and a ceramic plunger 11 is inserted into the tungsten carbide ceramic plunger cylinder 10. The tungsten carbide ceramic plunger cylinder 10 and the ceramic plunger 11 are made of high-quality ceramic materials, possessing excellent wear resistance and effectively resisting the erosion of fluids under ultra-high pressure, greatly extending the service life of the equipment and reducing maintenance costs. This is a significant advantage for plunger pumps operating under high pressure and high wear conditions for extended periods. A suction and discharge assembly connects the suction channel 2 and the discharge channel 3.

[0023] The suction and discharge assembly includes a valve housing 15. The side wall of the valve housing 15 has a flow channel 16 for connecting the suction channel 2 and the inner cavity 17 inside the valve housing 15. A sealing plate 18 is installed on one end face of the inner cavity 17 and fits against the outlet of the flow channel 16 to ensure unidirectional flow of fluid under specific working conditions, effectively prevent backflow, and greatly improve the stability and reliability of the pump body. The sealing plate 18 has a notch 19 for connecting the inner cavity 17 and the tungsten carbide ceramic plunger cylinder 10. The sealing plate 18 slides horizontally in the valve housing 15, and a conical valve core 23 is slidably arranged inside the valve housing 15, and the conical valve core 23 is blocked at the other end of the inner cavity 17.

[0024] like Figures 1 to 3As shown in the specific embodiment, the input shaft 5 is rotatably installed inside the plunger pump shell 1, the swash plate 6 is installed on the input shaft 5, the inclined surface of the swash plate 6 is close to one side of the tungsten carbide ceramic plunger cylinder 10, the axial thrust bearing 7 is installed at both ends of the swash plate 6, and the axial thrust bearing 7 is installed in the inner wall of the plunger pump shell 1. The outer side wall of the axial thrust bearing 7 is in sliding connection with the ceramic plunger 11. This structure design can stably and efficiently convert the rotation of the input shaft 5 into the reciprocating linear motion of the ceramic plunger 11, which not only significantly improves the energy conversion efficiency and reduces the energy consumption, but also enhances the stability of the equipment operation and guarantees the reliability of the plunger pump during long-time operation.

[0025] As shown in the specific embodiment, Figures 1 to 3 Further, the end face of the axial thrust bearing 7 is provided with a ceramic sliding shoe 8, the ceramic sliding shoe 8 is internally provided with a guide ball 12, the guide ball 12 is matched with the inner wall of the ceramic sliding shoe 8, the guide ball 12 is connected with the end of the ceramic plunger 11, the outer side wall of the guide ball 12 is wrapped with a metal cladding sheet metal 9, and the metal cladding sheet metal 9 is installed on the ceramic sliding shoe 8. The above structure design improves the force transmission accuracy and stability, reduces the gap and looseness during movement, makes the movement of the ceramic plunger 11 more stable and accurate, and thus improves the accuracy and stability of fluid delivery, providing a strong guarantee for realizing accurate pumping under ultra-high pressure.

[0026] As shown in the specific embodiment, Figures 1 to 3 Further, the ceramic plunger 11 is provided with a shutter 13, the tungsten carbide ceramic plunger cylinder 10 is provided with a nickel-based alloy spring 14 on the outer wall, one end of the nickel-based alloy spring 14 is clamped on the end face of the plunger pump shell 1, and the other end is clamped on the shutter 13. The nickel-based alloy spring 14 can ensure that the ceramic plunger 11 is smoothly reset during return.

[0027] As shown in the specific embodiment, Figures 1 to 3 Further, the end of the valve shell 15 close to the ceramic sliding shoe 8 is provided with a positioning sleeve 22, the positioning sleeve 22 is internally provided with a sleeve 20, the sleeve 20 is connected with the sealing plate 18, the sleeve 20 is internally provided with a reset spring 21, and the other end of the reset spring 21 is clamped in the positioning sleeve 22. The reset spring 21 facilitates the rapid resetting of the sealing plate 18 in the later stage, and the flow passage 16 is blocked.

[0028] As shown in the specific embodiment, Figures 1 to 3 Further, the side wall of the discharge passage 3 is provided with a mounting cover 26, the mounting cover 26 is internally movably provided with a top block 24, the top block 24 is in contact with the conical valve core 23, the mounting cover 26 and the top block 24 are clamped and provided with a compression spring 25, the compression direction of the compression spring 25 and the moving direction of the top block 24 are on the same straight line, and the compression spring 25 ensures that the conical valve core 23 is in contact with the side wall of the inner cavity 17.

[0029] The implementation principle of the suction and discharge combined valve structure of the super-high pressure ceramic valve group type plunger pump of the embodiment is as follows:

[0030] In operation, the external power drives the input shaft 5 to rotate, and the input shaft 5 synchronously drives the swash plate 6 to rotate. Since the inclined surface of the swash plate 6 is close to one side of the tungsten carbide ceramic plunger cylinder 10, and the two ends of the swash plate 6 are provided with the axial thrust bearing 7 and are in sliding connection with the ceramic plunger 11, with the rotation of the swash plate 6, the ceramic plunger 11 performs a reciprocating linear motion in the tungsten carbide ceramic plunger cylinder 10.

[0031] When the ceramic plunger 11 moves outward, a negative pressure is formed in the tungsten carbide ceramic plunger cylinder 10. At this time, the liquid in the suction passage 2 enters the inner cavity 17 of the valve housing 15 through the flow passage 16 under the action of the pressure difference, and the liquid flowing out of the flow passage 16 in the above process will squeeze the sealing plate 18 to move, so that the sealing plate 18 and the flow passage 16 are separated, ensuring that the liquid can enter the inner cavity 17. Then, since the notch 19 is formed in the sealing plate 18, the liquid can flow into the tungsten carbide ceramic plunger cylinder 10 through the notch 19, realizing the suction process. At the same time, the conical valve core 23 is blocked at the other end of the inner cavity 17 under the action of its own gravity and the liquid pressure in the inner cavity 17, preventing the liquid from flowing back. When the above liquid flow ends, at this time, the sealing plate 18 slides horizontally under the action of the liquid pressure and the reset spring 21, resealing the flow passage 16.

[0032] When the ceramic plunger 11 moves inward, the liquid in the tungsten carbide ceramic plunger cylinder 10 is compressed, and the pressure rises. At this time, the liquid pressure pushes the conical valve core 23 to overcome the resistance of the compression spring 25, so that the conical valve core 23 leaves the blocking position, and the liquid passes through the passage between the inner cavity 17 and the discharge passage 3, and is discharged through the discharge passage 3. During the discharge process, the top block 24 in the mounting cover 26 is always in contact with the conical valve core 23 under the action of the compression spring 25, which assists in controlling the opening and closing of the conical valve core 23, ensuring the smoothness and stability of the discharge process.

Claims

1. A suction and discharge combined valve structure for an ultra-high pressure ceramic valve group plunger pump, comprising a plunger pump housing (1), wherein an end cover (4) is installed on the side wall of the plunger pump housing (1), and the end cover (4) is provided with a suction channel (2) and a discharge channel (3), wherein a tungsten carbide ceramic plunger cylinder (10) is installed inside the plunger pump housing (1), and a ceramic plunger (11) is inserted into the tungsten carbide ceramic plunger cylinder (10), characterized in that: An inhalation and discharge assembly is connected between the inhalation channel (2) and the discharge channel (3); The suction and discharge assembly includes a valve housing (15). The valve housing (15) has a flow channel (16) on its side wall for connecting the suction channel (2) and the inner cavity (17) inside the valve housing (15). A sealing plate (18) is installed on one end face of the inner cavity (17) and the sealing plate (18) fits against the outlet of the flow channel (16). The sealing plate (18) has a notch (19) for connecting the inner cavity (17) and the tungsten carbide ceramic plunger cylinder (10). The sealing plate (18) slides horizontally in the valve housing (15), and a conical valve core (23) is slidably arranged inside the valve housing (15) and the conical valve core (23) is blocked at the other end of the inner cavity (17).

2. The suction and discharge combined valve structure of an ultra-high pressure ceramic valve group plunger pump according to claim 1, characterized in that, An input shaft (5) is rotatably mounted inside the plunger pump housing (1). A swash plate (6) is mounted on the input shaft (5), and the inclined surface of the swash plate (6) is close to the side of the tungsten carbide ceramic plunger cylinder (10). Axial thrust bearings (7) are mounted at both ends of the swash plate (6), and the axial thrust bearings (7) are installed in the inner wall of the plunger pump housing (1). The outer wall of the axial thrust bearings (7) is slidably connected to the ceramic plunger (11).

3. The suction and discharge combined valve structure of an ultra-high pressure ceramic valve group plunger pump according to claim 2, characterized in that, The axial thrust bearing (7) has a ceramic slipper (8) on its end face. A guide ball (12) is slidably arranged inside the ceramic slipper (8), and the guide ball (12) is adapted to the inner wall of the ceramic slipper (8). The guide ball (12) is connected to the end of the ceramic plunger (11). The outer wall of the guide ball (12) is wrapped with a metal-clad sheet metal (9), and the metal-clad sheet metal (9) is installed on the ceramic slipper (8).

4. The suction and discharge combined valve structure of an ultra-high pressure ceramic valve group plunger pump according to claim 1, characterized in that, A baffle plate (13) is installed on the ceramic plunger (11), and a nickel-based alloy spring (14) is sleeved on the outer wall of the tungsten carbide ceramic plunger cylinder (10). One end of the nickel-based alloy spring (14) is clamped to the end face of the plunger pump housing (1), and the other end is clamped to the baffle plate (13).

5. The suction and discharge combined valve structure of an ultra-high pressure ceramic valve group plunger pump according to claim 1, characterized in that, A positioning sleeve (22) is installed at the end of the valve body (15) near the ceramic slipper (8). A sleeve (20) is slidably installed inside the positioning sleeve (22), and the sleeve (20) is connected to the sealing plate (18). A return spring (21) is installed in the inner cavity of the sleeve (20), and the other end of the return spring (21) is engaged in the positioning sleeve (22).

6. The suction and discharge combined valve structure of an ultra-high pressure ceramic valve group plunger pump according to claim 1, characterized in that, The side wall of the discharge channel (3) is equipped with a mounting cover (26), and a top block (24) is movably installed inside the mounting cover (26). The top block (24) fits against the conical valve core (23). A compression spring (25) is snapped between the mounting cover (26) and the top block (24). The compression direction of the compression spring (25) and the movement direction of the top block (24) are on the same straight line.

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