Plunger pump

Abstract

The utility model relates to the technical field of hydraulic plunger pumps, in particular to a plunger pump which comprises a material cylinder, an upper pump body, a lower pump body and a water inlet pipe assembly. The interior of the material cylinder is divided into an upper material cavity and a lower material cavity which are separated through a material cylinder piston. According to the plunger pump, the interior of the plunger pump is divided into the upper material cavity and the lower material cavity which are isolated through the material cylinder piston, and in the lifting process of the material cylinder piston, the upper material cavity and the lower material cavity which are isolated can carry out alternate operation of water taking and water draining at the same time, so that hydraulic power is fully utilized for providing energy, and the water supply conveying frequency of the plunger pump is also improved. Besides, compared with an existing plunger pump, the inner diameter of the compression cavity can reach 1200 mm, high-flow water taking is met, meanwhile, high lift is achieved, and the plunger pump can be used for mountain top water taking; meanwhile, due to the vertical design, the space utilization rate is high, and the overall structure is more compact. The hydraulic driving mechanism, the upper pump body, the material cylinder and the lower pump body are designed to be of a split structure, so that disassembly and maintenance are convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic plunger pump technical field especially relates to a plunger pump. BACKGROUND

[0002] The conventional hydraulic piston pump is a positive displacement hydraulic pump, which realizes the suction and discharge of liquid through the reciprocating movement of the piston, and is widely used in high-pressure and high-power hydraulic systems (such as engineering machinery, industrial equipment, etc.). Its reciprocating movement: the piston makes reciprocating linear motion in the cylinder, and the pressure difference is generated by changing the volume of the sealed cavity. Suction process: when the piston retracts, the cavity volume increases, forming a vacuum, and the liquid is sucked in through the oil inlet valve. Discharge process: when the piston advances, the cavity volume decreases, and the liquid is discharged through the oil outlet valve after being pressed.

[0003] However, the existing hydraulic piston pump, when in use, since the conventional water inlet pipe and the water outlet pipe only communicate with the cavity below the piston, the part of energy cannot be effectively utilized when the piston is retracted by using hydraulic power to drive, and the hydraulic power energy cannot be fully utilized, which not only causes large energy consumption, but also the frequency of conventional reciprocating water intake and water compression is slow, and the delivery flow is limited. SUMMARY

[0004] The utility model aims at providing a plunger pump, which solves the problems of large energy consumption and low delivery efficiency of the conventional plunger pump.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The utility model provides a plunger pump, which comprises a material cylinder, an upper pump body, a lower pump body, a water inlet pipe assembly,

[0007] The material cylinder is a vertical hollow structure, which is divided into two isolated material cavities by a material cylinder piston, and the material cylinder piston is connected with a hydraulic drive mechanism through a connecting shaft; the top of the upper pump body is provided with a sealing cover, the bottom thereof is communicated with the upper end of the material cylinder, and a liquid inlet and a liquid outlet are formed in the side wall thereof; a sealing sleeve matched with the connecting shaft is arranged on the sealing cover; the top of the lower pump body is communicated with the lower end of the material cylinder, and a liquid inlet and a liquid outlet are formed in the side wall thereof; the water inlet pipe assembly comprises a water inlet pipe communicated with the liquid inlets of the upper pump body and the lower pump body respectively, and a water outlet pipe communicated with the liquid inlets of the upper pump body and the liquid outlets of the lower pump body respectively; a water inlet one-way valve is arranged at the upper and lower ends of the water inlet pipe, and a water inlet is arranged on the water inlet pipe between the two water inlet one-way valves; a water outlet one-way valve is arranged at the upper and lower ends of the water outlet pipe, and a water outlet is arranged on the water outlet pipe between the two water outlet one-way valves.

[0008] Further in the embodiment, the hydraulic drive mechanism is installed on the top of the upper pump body through a support, wherein the support supports the hydraulic drive mechanism.

[0009] Still further in the embodiment, the hydraulic drive mechanism comprises a hydraulic cylinder, a hydraulic piston arranged in the hydraulic cylinder, and a telescopic rod coaxially connected with the hydraulic piston and extending below the hydraulic cylinder; the hydraulic cylinder is provided with hydraulic power by a hydraulic station, and the lower end of the telescopic rod is coaxially connected with the upper end of the connecting shaft through a shaft coupling; wherein the hydraulic station provides the hydraulic power to realize high-lift fluid delivery.

[0010] Still further in the embodiment, a water inlet one-way valve I is arranged between the upper end of the water inlet pipe and the liquid inlet of the upper pump body, a water inlet one-way valve II is arranged between the lower end of the water inlet pipe and the liquid inlet of the lower pump body, a water inlet is further arranged on the water inlet pipe, and a flange pipe is arranged at the water inlet.

[0011] Still further in the embodiment, a water outlet one-way valve I is arranged between the upper end of the water outlet pipe and the liquid outlet of the upper pump body, a water outlet one-way valve II is arranged between the lower end of the water outlet pipe and the liquid outlet of the lower pump body, a water outlet is further arranged on the water outlet pipe, and a flange pipe is arranged at the water outlet.

[0012] Still further in the embodiment, wherein the water inlet one-way valve I, the water inlet one-way valve II, the water outlet one-way valve I and the water outlet one-way valve II realize the one-way flow of the fluid through the automatic opening and closing of the valve core depending on the pressure difference of the fluid, so that the two cavities above and below the cylinder piston can realize the alternating actions of water taking and water discharging during the up-and-down sliding of the cylinder piston in the cylinder.

[0013] Still further in the embodiment, a pressure stabilizing tank I is arranged on the top of the water inlet pipe, and a pressure stabilizing tank II is arranged on the top of the water outlet pipe.

[0014] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0015] (1) In the utility model, the cylinder is divided into two isolated material cavities by the cylinder piston, and when the cylinder piston is lifted by the hydraulic drive mechanism, the water inlet pipe and the water outlet pipe are cooperated and connected in parallel, so that the two isolated material cavities can realize the alternating actions of water taking and water discharging during the lifting of the cylinder piston, thereby fully utilizing the hydraulic power to provide energy and realizing the technical effect of energy saving, and the water supply and delivery frequency of the plunger pump is also improved.

[0016] (2), relative to the existing plunger pump, the compression cavity inner diameter in the application can reach 1200mm, while meeting the large flow water taking, also has high lift, can be used for mountain top water taking; Meanwhile, the vertical design of the application has high space utilization rate, and the overall structure is more compact.

[0017] (3), the hydraulic drive mechanism, the upper pump body, the material cylinder and the lower pump body are designed as a split structure in the application, so that disassembly and maintenance are facilitated.

[0018] (4), the application can also be used for conveying sewage, thick slurry and ore slurry. Since the material cylinder piston is vertically designed, it has high wear resistance during operation, and the service life of the existing slurry pump can be prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further described below in combination with the drawings.

[0020] Figure 1 It is a structure schematic view of the plunger pump of example 1.

[0021] Figure 2 It is a structure schematic view of the plunger pump of example 2.

[0022] Figure 3 It is a top view schematic view of the plunger pump of example 2.

[0023] Mark explanation: 1, hydraulic drive mechanism; 11, telescopic rod; 12, hydraulic oil; 13, hydraulic piston; 14, shaft coupling; 2, support; 3, upper pump body; 31, sealing sleeve; 4, material cylinder; 41, connecting shaft; 42, material cylinder piston; 5, lower pump body; 6, water inlet pipe; 61, water inlet check valve I; 62, water inlet; 63, water inlet check valve II; 64, pressure stabilizing tank I; 7, water outlet pipe; 71, water outlet check valve I; 72, water outlet; 73, water outlet check valve II; 74, pressure stabilizing tank II; 81, upper layer cavity water inlet pipe; 82, upper layer cavity water outlet pipe. DETAILED DESCRIPTION

[0024] Example 1

[0025] Reference Figure 1 In the embodiment, a plunger pump is disclosed, which comprises a material cylinder 4, an upper pump body 3 installed on the top of the material cylinder 4 and a lower pump body 5 installed on the bottom of the material cylinder 4.

[0026] The material cylinder 4 is a vertical hollow structure, which is divided into upper and lower isolated material cavities by a material cylinder piston 42, and the material cylinder piston 42 is connected with a hydraulic drive mechanism 1 through a connecting shaft 41. Compared with conventional plunger pumps, the inner diameter is limited, and the conveying flow is also limited. The inner diameter of the material cylinder 4 can reach 1200mm, and the energy consumption can be reduced.

[0027] As an embodiment, the hydraulic drive mechanism 1 is installed on the top of the upper pump body 3 through a support 2; specifically, the support 2 can be a support plate or a support rod / pole.

[0028] Wherein the hydraulic drive mechanism 1 comprises a hydraulic cylinder, a hydraulic piston 13 installed in the hydraulic cylinder, and a telescopic rod 11 coaxially connected with the hydraulic piston 13 and extending below the hydraulic cylinder; the hydraulic cylinder is powered by a hydraulic station, and the lower end of the telescopic rod 11 is coaxially connected with the upper end of the connecting shaft 41 through a shaft coupling 14; thus, hydraulic oil 12 is delivered into the hydraulic cylinder cavities on the upper and lower end faces of the hydraulic piston 13 through the hydraulic station, so as to drive the telescopic rod 11 to reciprocatingly ascend and descend; in a specific embodiment, a controller is further installed between the hydraulic station and the hydraulic cylinder, wherein the controller is used to adjust the valves at the inlet and outlet ends of the material cylinder 4.

[0029] In this embodiment, the top of the upper pump body 3 is provided with a sealing cover, the bottom thereof is communicated with the upper end of the material cylinder 4, and the side wall thereof is provided with an inlet and an outlet; wherein a sealing sleeve 31 adapted to the connecting shaft 41 is sealingly installed on the sealing cover, so as to drive the connecting shaft 41 to ascend and descend by the hydraulic drive mechanism 1, thereby driving the material cylinder piston 42 to ascend and descend in the material cylinder 4; the bottom of the lower pump body 5 is closed, the top thereof is communicated with the lower end of the material cylinder 4, and the side wall thereof is provided with an inlet and an outlet;

[0030] In this embodiment, the water inlet pipe assembly comprises a water inlet pipe 6 communicated with the inlet of the upper pump body 3 and the inlet of the lower pump body 5 respectively, and a water outlet pipe 7 communicated with the inlet of the upper pump body 3 and the outlet of the lower pump body 5 respectively; wherein a water inlet check valve is installed at the upper and lower ends of the water inlet pipe 6 respectively, and a water inlet 62 is installed on the water inlet pipe 6 and located between the two water inlet check valves; a water outlet check valve is installed at the upper and lower ends of the water outlet pipe 7 respectively, and a water outlet 72 is installed on the water outlet pipe 7 and located between the two water outlet check valves.

[0031] As an embodiment, a water inlet check valve I 61 is installed between the upper end of the water inlet pipe 6 and the inlet of the upper pump body 3, a water inlet check valve II 63 is installed between the lower end of the water inlet pipe 6 and the inlet of the lower pump body 5, a water inlet 62 is further provided on the water inlet pipe 6, and a flange pipe is installed at the water inlet 62.

[0032] As an implementation, a water outlet one-way valve I 71 is installed between the upper end of the water outlet pipe 7 and the liquid outlet of the upper pump body 3, a water outlet one-way valve II 73 is installed between the lower end of the water outlet pipe 7 and the liquid outlet of the lower pump body 5, and a water outlet opening 72 is further formed on the water outlet pipe 7, and a flange pipe is installed at the water outlet opening 72.

[0033] In the embodiment, the water inlet one-way valve I 61, the water inlet one-way valve II 63, the water outlet one-way valve I 71 and the water outlet one-way valve II 73 realize the one-way flow of fluid by the automatic opening and closing of the valve core depending on the pressure difference of the fluid. A pressure stabilizing tank I 64 is installed at the top of the water inlet pipe 6, and a pressure stabilizing tank II 74 is installed at the top of the water outlet pipe 7; wherein the pressure stabilizing tank I 64 and the pressure stabilizing tank II 74 are both cylindrical structures, and air can be filled into the inner top end to complete the pressure stabilizing effect of the liquid inlet and outlet by using air pressure.

[0034] The working process of the utility model is as follows:

[0035] When the hydraulic drive mechanism 1 drives the connecting shaft 41 to rise, the material cylinder piston 42 is driven to rise in the material cylinder 4, the cavity space above the material cylinder piston 42 is compressed, and the cavity space below the material cylinder piston 42 is increased; referring to Figure 1 At this time, the one-way flow of fluid is realized by the automatic opening and closing of the valve core depending on the pressure difference of the fluid; the water inlet one-way valve I 61 at the upper end of the water inlet pipe 6 is closed, and the water inlet one-way valve II 63 at the lower end of the water inlet pipe 6 is opened; at the same time, the water outlet one-way valve II 73 at the lower end of the water outlet pipe 7 is closed, and the water outlet one-way valve I 71 at the upper end of the water outlet pipe 7 is opened; thereby realizing the discharge of the liquid in the cavity above the material cylinder piston 42 and the supply of liquid to the cavity below the material cylinder piston 42.

[0036] When the hydraulic drive mechanism 1 drives the connecting shaft 41 to descend, the material cylinder piston 42 is driven to descend in the material cylinder 4, the cavity space above the material cylinder piston 42 is expanded, and the cavity space below the material cylinder piston 42 is compressed; referring to Figure 1 At this time, according to the pressure difference of the fluid, the water inlet one-way valve I 61 at the upper end of the water inlet pipe 6 is opened, and the water inlet one-way valve II 63 at the lower end of the water inlet pipe 6 is closed; at the same time, the water outlet one-way valve II 73 at the lower end of the water outlet pipe 7 is opened, and the water outlet one-way valve I 71 at the upper end of the water outlet pipe 7 is closed; thereby realizing the discharge of the liquid in the cavity below the material cylinder piston 42 and the supply of liquid to the cavity above the material cylinder piston 42.

[0037] Embodiment 2

[0038] On the basis of embodiment 1, the connection mode of the water inlet pipe 6 and the water outlet pipe 7 with the internal cavity of the material cylinder 4 is improved.

[0039] As an implementation, refer to Figure 2 and Figure 3 Wherein the water inlet pipe 6 and the water outlet pipe 7 are designed side by side, so that the structure is more compact; in addition, a three-way pipe is connected to the cavity above the material cylinder piston 42 in the material cylinder 4, and the other two structures of the three-way pipe are respectively connected to the upper cavity water inlet pipe 81 and the upper cavity water outlet pipe 82; wherein the upper cavity water inlet pipe 81 is connected to the water inlet pipe 6, and the upper cavity water outlet pipe 82 is connected to the water outlet pipe 7; and a one-way valve is installed on the upper cavity water inlet pipe 81 and the upper cavity water outlet pipe 82 respectively.

[0040] Similarly, another three-way pipe is also connected to the cavity below the material cylinder piston 42 in the material cylinder 4, and the other two structures of the three-way pipe are respectively connected to the lower cavity water inlet pipe and the lower cavity water outlet pipe; wherein the lower cavity water inlet pipe is connected to the water inlet pipe 6, and the lower cavity water outlet pipe is connected to the water outlet pipe 7; a one-way valve is installed on the lower cavity water inlet pipe and the lower cavity water outlet pipe respectively.

[0041] The above embodiments only describe the preferred mode of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A piston pump characterized in that, The utility model provides a kind of hydraulic pressure driven mechanism and water supply system, including: Material cylinder, which is vertical hollow structure, is divided into two isolated material cavities by material cylinder piston in it, and the material cylinder piston is connected with hydraulic drive mechanism by connecting shaft; Upper pump body, which is provided with sealing cover at top, is communicated with upper end of the material cylinder at bottom, and inlet and outlet are opened in its side wall;Wherein sealing sleeve is arranged on the sealing cover and matched with the connecting shaft; Lower pump body, which is communicated with lower end of the material cylinder at top, is opened with inlet and outlet in its side wall; Water inlet pipe assembly, which includes water inlet pipe communicated with upper pump body inlet and lower pump body inlet respectively, water outlet pipe communicated with upper pump body outlet and lower pump body outlet respectively;Wherein water inlet check valve is arranged at upper and lower ends of the water inlet pipe respectively, and water inlet is arranged on the water inlet pipe and between two water inlet check valves;Water outlet check valve is arranged at upper and lower ends of the water outlet pipe respectively, and water outlet is arranged on the water outlet pipe and between two water outlet check valves.

2. The piston pump of claim 1, wherein: The hydraulic drive mechanism is arranged on the top of the upper pump body by support.

3. The piston pump of claim 2, wherein: The hydraulic drive mechanism includes hydraulic cylinder, hydraulic piston arranged in the hydraulic cylinder, telescopic rod coaxially connected with the hydraulic piston and extended below the hydraulic cylinder;The hydraulic cylinder is provided with hydraulic power by hydraulic station, and the lower end of the telescopic rod is coaxially connected with the upper end of the connecting shaft by coupling.

4. The piston pump of claim 3, wherein: Water inlet check valve I is arranged between upper end of the water inlet pipe and inlet of the upper pump body, water inlet check valve II is arranged between lower end of the water inlet pipe and inlet of the lower pump body, water inlet is also opened on the water inlet pipe, and flange pipe is arranged at the water inlet.

5. The piston pump of claim 4, wherein: Water outlet check valve I is arranged between upper end of the water outlet pipe and outlet of the upper pump body, water outlet check valve II is arranged between lower end of the water outlet pipe and outlet of the lower pump body, water outlet is also opened on the water outlet pipe, and flange pipe is arranged at the water outlet.

6. The piston pump of claim 5, wherein: Stabilizing tank I is arranged on the top of the water inlet pipe, and stabilizing tank II is arranged on the top of the water outlet pipe.

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