Single-hydraulic-pump double-plunger-pump pumping equipment

Abstract

The utility model provides pumping equipment with a single hydraulic pump and double plunger pumps, and belongs to the technical field of material pumping. The pumping equipment with the single hydraulic pump and the double plunger pumps comprises a main pump and a plunger pump, the main reversing valve comprises an oil inlet, a first working oil port and a second working oil port, and the oil inlet is communicated with the main pump; a rodless cavity oil port of the first oil cylinder is communicated with a first working oil port of the main reversing valve; a rodless cavity oil port of the second oil cylinder is communicated with a second working oil port of the main reversing valve, and a rod cavity oil port of the first oil cylinder is communicated with a rod cavity oil port of the second oil cylinder; the first plunger pump is driven by the first oil cylinder; the first plunger pump is driven by the first oil cylinder, the second plunger pump is driven by the second oil cylinder, the main pump simultaneously drives the first plunger pump and the second plunger pump through the main reversing valve, and the first plunger pump and the second plunger pump alternately work. According to the technical scheme, the two oil cylinders are controlled through one main pump, the two oil cylinders can be independently controlled, and the working efficiency of the material pumping equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of material pumping, in particular to a single hydraulic pump and double plunger pump pumping equipment. Background Art

[0002] The working mode of traditional material pumping equipment is to hydraulically drive a single cylinder, and the piston rod of the cylinder pushes the pumping equipment's pusher, thereby pushing the material to achieve material transportation. In this working mode, the retreat stage of the plunger pump and the material filling stage will occupy most of the working time of the pumping equipment, resulting in low working efficiency of the entire production line. Utility Model Content

[0003] The utility model provides a single hydraulic pump and double plunger pump pumping equipment, which solves the problem that the retreat stage and material filling stage of the plunger pump of traditional material pumping equipment take up a long working time and the equipment has low working efficiency.

[0004] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0005] A single hydraulic pump double plunger pump pumping device, comprising:

[0006] Main pump;

[0007] A main reversing valve, comprising an oil inlet, a first working oil port and a second working oil port, wherein the oil inlet is connected to the main pump;

[0008] a first oil cylinder, wherein a rodless chamber oil port of the first oil cylinder is connected to a first working oil port of the main reversing valve;

[0009] a second oil cylinder, wherein the rodless chamber oil port of the second oil cylinder is communicated with the second working oil port of the main reversing valve, and the rod chamber oil port of the first oil cylinder is communicated with the rod chamber oil port of the second oil cylinder;

[0010] a first plunger pump, driven by the first oil cylinder;

[0011] The second piston pump is driven by the second oil cylinder.

[0012] Wherein: the main pump drives the first plunger pump and the second plunger pump simultaneously through the main reversing valve, and the first plunger pump and the second plunger pump operate alternately.

[0013] Optionally, a first balancing valve is provided between the rodless chamber oil port of the first oil cylinder and the first working oil port of the main reversing valve.

[0014] Optionally, a second balancing valve is provided between the rodless chamber oil port of the second oil cylinder and the second working oil port of the main reversing valve.

[0015] Optionally, the main reversing valve further includes an oil return port, and the oil return port is connected to the oil tank.

[0016] Optionally, the single hydraulic pump dual plunger pump pumping equipment further includes:

[0017] The first auxiliary reversing valve, the oil inlet of the first auxiliary reversing valve is connected to the main pump, the first working oil port of the first auxiliary reversing valve is connected to the rodless chamber oil port of the first cylinder; the second working oil port of the first auxiliary reversing valve is connected to the rod chamber oil port of the first cylinder.

[0018] Optionally, the connection point between the first working oil port of the first auxiliary reversing valve and the rodless chamber oil port of the first oil cylinder is located between the rodless chamber oil port of the first oil cylinder and the first working oil port of the first balancing valve.

[0019] Optionally, the single hydraulic pump dual plunger pump pumping equipment further includes:

[0020] The second auxiliary reversing valve, the oil inlet of the second auxiliary reversing valve is connected to the main pump, the first working oil port of the second auxiliary reversing valve is connected to the rodless chamber oil port of the second cylinder; the second working oil port of the second auxiliary reversing valve is connected to the rod chamber oil port of the second cylinder.

[0021] Optionally, the connection point between the first working oil port of the second auxiliary reversing valve and the rodless chamber oil port of the second oil cylinder is located between the rodless chamber oil port of the second oil cylinder and the first working oil port of the second balancing valve.

[0022] Optionally, the single hydraulic pump dual plunger pump pumping equipment further includes:

[0023] A first plunger pump and a second plunger pump having a material cavity;

[0024] A material inlet, the material inlet being arranged on the wall of the material cavity of the first plunger pump and the second plunger pump;

[0025] A gate device is provided between the material port and the material chamber, and the gate device comprises a gate plate, and the gate plate performs reciprocating motion to open or close the material port.

[0026] Optionally, the material port includes:

[0027] A first feed inlet, the first feed inlet is arranged on a cavity wall in the middle of the cavity of the first plunger pump and is connected to the cavity of the first plunger pump;

[0028] A second feed inlet, the second feed inlet is arranged on a cavity wall in the middle of the material cavity of the second plunger pump and is communicated with the material cavity of the second plunger pump;

[0029] A first discharge port, which is disposed on a cavity wall at an end of a cavity of the first plunger pump and is connected to the cavity of the first plunger pump;

[0030] The second discharge port is arranged on the cavity wall of the end of the cavity of the second plunger pump and is communicated with the cavity of the second plunger pump.

[0031] The technical solution of the utility model includes at least the following effects:

[0032] The technical solution of the utility model adopts double-pushing cylinders working in coordination with each other. The two cylinders are controlled by a main pump. The two cylinders can be controlled independently, so that one cylinder extends and the other retracts at the same time, ensuring that the double-pump pumping operation is reliable and controllable, and the actions between them are closely connected. It has the characteristics of flexible control, high integration and strong action connection, thereby improving the working efficiency of the material pumping equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the oil circuit system structure of a single hydraulic pump and double plunger pump pumping equipment of the utility model embodiment;

[0034] Figure 2 It is a three-dimensional structural schematic diagram of a single hydraulic pump and double plunger pump pumping device according to an embodiment of the utility model;

[0035] Figure 3 It is a schematic diagram of the internal structure of the oil cylinder and the plunger pump of the single hydraulic pump and double plunger pump pumping equipment of the utility model embodiment;

[0036] Among them, 1. main pump; 2. first balancing valve; 3. first oil cylinder; 4. second oil cylinder; 5. second balancing valve; 6. second auxiliary reversing valve; 7. first auxiliary reversing valve; 8. main reversing valve; 9. oil tank; 10. first plunger pump; 11. second plunger pump; 12. rodless chamber oil port; 13. rod chamber oil port; 14. piston mechanism; 15. material chamber; 16. discharge port; 17. feed port. DETAILED DESCRIPTION

[0037] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0038] like Figure 1As shown, a single hydraulic pump dual-plunger pump pumping equipment proposed in an embodiment of the utility model includes: a main pump 1; a main reversing valve 8, including an oil inlet, a first working oil port and a second working oil port, the oil inlet is connected to the main pump 1; a first oil cylinder 3, the rodless chamber oil port of the first oil cylinder 3 is connected to the first working oil port of the main reversing valve 8; a second oil cylinder 4, the rodless chamber oil port of the second oil cylinder 4 is connected to the second working oil port of the main reversing valve 8, and the rod chamber oil port of the first oil cylinder 3 is connected to the rod chamber oil port of the second oil cylinder 4; a first plunger pump 10, driven by the first oil cylinder 3; a second plunger pump 11, driven by the second oil cylinder 4, wherein: the main pump 1 simultaneously drives the first plunger pump 10 and the second plunger pump 11 through the main reversing valve 8, and the first plunger pump 10 and the second plunger pump 11 operate alternately.

[0039] In this embodiment, the single hydraulic pump dual-piston pump pumping equipment includes a main pump 1 and two cylinders, the two cylinders are respectively a first cylinder 3 and a second cylinder 4, the two cylinders are provided with chambers inside, the chambers are divided into two parts by a piston mechanism 14, namely a rodless chamber and a rod chamber; the piston mechanism 14 includes a first piston mechanism and a second piston mechanism, the first piston mechanism is arranged in the first cylinder 3 for reciprocating motion, and the second piston mechanism is arranged in the second cylinder 4 for reciprocating motion; the oil inlet of the main reversing valve 8 is connected to the main pump 1; the first working oil port of the main reversing valve 8 is connected to the rodless chamber oil port of the first cylinder 3; the second working oil port of the main reversing valve 8 is connected to the rodless chamber oil port of the second cylinder 4. When in use, the main pump 1 generates pressure on the hydraulic oil, which is transmitted to the first cylinder 3 or the second cylinder 4 through the internal channel of the main reversing valve 8. The two working oil ports of the main reversing valve 8 work alternately. For example, when the first working oil port of the main reversing valve 8 discharges oil, the second working oil port of the main reversing valve 8 returns oil; the hydraulic oil is transmitted to the rodless chamber of the first cylinder 3 or the second cylinder 4 through the balance valve; taking the discharge of oil from the first working oil port of the main reversing valve 8 as an example, after the hydraulic oil enters the rodless chamber of the first cylinder 3, it pushes the piston mechanism of the first cylinder 3 to move , which increases the volume of the rodless chamber of the first cylinder 3 and reduces the volume of the rod chamber. The hydraulic oil in the rod chamber of the first cylinder 3 enters the rod chamber of the second cylinder 4, which increases the volume of the rod chamber of the second cylinder 4, driving the piston mechanism of the second cylinder 4 to move, and its movement direction is opposite to that of the piston mechanism of the first cylinder 3; when the piston mechanism 14 reaches the predetermined position, the main reversing valve 8 is switched to switch the inlet and outlet oil states of the two working oil ports, so that the movement direction of the piston mechanisms in the first cylinder 3 and the second cylinder 4 is reversed.

[0040] The technical solution of the utility model can mechanically ensure, through the above-mentioned structural design, that when the piston mechanism of one oil cylinder extends, the piston mechanism of another oil cylinder must retract, so that the movement of the piston mechanisms of the two oil cylinders can be controlled by only one main pump, thereby improving the working efficiency of the material pumping equipment.

[0041] The embodiment of the utility model proposes a single hydraulic pump double-plunger pump pumping equipment, a first balancing valve 2 is provided between the rodless chamber oil port of the first oil cylinder 3 and the first working oil port of the main reversing valve 8, the second working oil port of the first balancing valve 2 is connected to the first working oil port of the main reversing valve 8, the first working oil port of the first balancing valve 2 is connected to the rodless chamber oil port of the first oil cylinder 3; a second balancing valve 5 is provided between the rodless chamber oil port of the second oil cylinder 4 and the second working oil port of the main reversing valve 8, the second working oil port of the second balancing valve 5 is connected to the second working oil port of the main reversing valve 8, the first working oil port of the second balancing valve 5 is connected to the rodless chamber oil port of the second oil cylinder 4.

[0042] In this embodiment, balancing valves are provided between the oil circuits connecting the two cylinders and the main reversing valve 8, which are the first balancing valve 2 and the second balancing valve 5; wherein the first balancing valve 2 is provided between the rodless chamber oil port of the first cylinder 3 and the first working oil port of the main reversing valve 8, and the second balancing valve 5 is provided between the rodless chamber oil port of the second cylinder 4 and the second working oil port of the main reversing valve 8; by providing balancing valves, when one cylinder needs to realize the forward or backward movement alone, the oil circuit of the other cylinder can be prevented from being opened and moving.

[0043] The single hydraulic pump dual-plunger pump pumping device proposed in an embodiment of the utility model also includes: a first auxiliary reversing valve 7, the oil inlet of the first auxiliary reversing valve 7 is connected to the main pump 1, the first working oil port of the first auxiliary reversing valve 7 is connected to the rodless chamber oil port of the first oil cylinder 3; the second working oil port of the first auxiliary reversing valve 7 is connected to the rod chamber oil port of the first oil cylinder 3; the connecting point between the first working oil port of the first auxiliary reversing valve 7 and the rodless chamber oil port of the first oil cylinder 3 is located between the rodless chamber oil port of the first oil cylinder 3 and the rodless chamber oil port of the first oil cylinder 3. Between the first working oil port of a balancing valve 2; a second auxiliary reversing valve 6, the oil inlet of the second auxiliary reversing valve 6 is connected to the main pump 1, and the first working oil port of the second auxiliary reversing valve 6 is connected to the rodless chamber oil port of the second cylinder 4; the second working oil port of the second auxiliary reversing valve 6 is connected to the rod chamber oil port of the second cylinder 4; the connecting point between the first working oil port of the second auxiliary reversing valve 6 and the rodless chamber oil port of the second cylinder 4 is located between the rodless chamber oil port of the second cylinder 4 and the first working oil port of the second balancing valve 5.

[0044] In this embodiment, the rodless chambers of the first oil cylinder 3 and the second oil cylinder 4 are also connected to the main pump 1 through an auxiliary reversing valve; the auxiliary reversing valve includes a first auxiliary reversing valve 7 and a second auxiliary reversing valve 6, wherein the connecting point between the first working oil port of the first auxiliary reversing valve 7 and the rodless chamber oil port of the first oil cylinder 3 is located between the rodless chamber oil port of the first oil cylinder 3 and the first working oil port of the first balancing valve 2; the connecting point between the first working oil port of the second auxiliary reversing valve 6 and the rodless chamber oil port of the second oil cylinder 4 is located between the rodless chamber oil port of the second oil cylinder 4 and the first working oil port of the second balancing valve 5; by setting the auxiliary reversing valve, the movement of the piston mechanisms 14 of the two cylinders can be independently adjusted, and the piston mechanisms 14 of the two cylinders can be controlled to retract or extend independently; when the single hydraulic pump and double plunger pump pumping equipment stops, or hydraulic oil leakage occurs, resulting in movement position deviation of the two cylinders after running for a long time, the main reversing valve 8 is closed and the auxiliary reversing valve is opened to independently adjust the piston mechanisms 14 of the two cylinders so that the piston mechanisms 14 move to the predetermined positions.

[0045] like Figure 2 and Figure 3 As shown, the single hydraulic pump dual-plunger pump pumping equipment proposed in an embodiment of the utility model also includes: a first plunger pump 10 and a second plunger pump 11 having a material chamber 15, the first plunger pump 10 is fixedly connected to the first oil cylinder 3, and the second plunger pump 11 is fixedly connected to the second oil cylinder 4; a material port, the material port is arranged on the wall of the material chamber of the first plunger pump 10 and the second plunger pump 11; a gate device, the gate device is arranged between the material port and the material chamber, the gate device includes a gate, and the gate performs reciprocating motion to open or close the material port.

[0046] In this embodiment, the single hydraulic pump dual plunger pump pumping equipment also includes two plunger pumps, namely a first plunger pump 10 and a second plunger pump 11; wherein the first plunger pump 10 is fixedly connected to the first oil cylinder 3, and the second plunger pump 11 is fixedly connected to the second oil cylinder 4; both plunger pumps are provided with a material chamber 15, a material port and a gate device, wherein the material port is arranged on the wall of the material chamber of the first plunger pump 10 and the second plunger pump 11, and is divided into a feed port 17 and a discharge port 16, when the piston mechanism 14 of the oil cylinder drives the plunger pump to perform a material filling operation, the material enters the material chamber 15 of the plunger pump through the feed port 17, and when the piston mechanism 14 of the oil cylinder drives the plunger pump to perform a material pushing operation, the material is pushed out of the material chamber 15 of the plunger pump through the discharge port 16; the gate device is arranged between the material port and the material chamber 15, and the gate device includes a gate and a driving device, and the gate performs reciprocating motion under the action of the driving device to open or close the material port.

[0047] like Figure 2 and Figure 3As shown, the single hydraulic pump and double plunger pump pumping equipment proposed in the embodiment of the utility model, the material port, includes: a first feed port, the first feed port is arranged on the cavity wall in the middle of the material cavity of the first plunger pump 10, and is connected to the material cavity of the first plunger pump 10; a second feed port, the second feed port is arranged on the cavity wall in the middle of the material cavity of the second plunger pump 11, and is connected to the material cavity of the second plunger pump 11; a first discharge port, the first discharge port is arranged on the cavity wall at the end of the material cavity of the first plunger pump 10, and is connected to the material cavity of the first plunger pump 10; a second discharge port, the second discharge port is arranged on the cavity wall at the end of the material cavity of the second plunger pump 11, and is connected to the material cavity of the second plunger pump 11.

[0048] In this embodiment, the material port includes: a first feed port, a second feed port, a first discharge port and a second feed port, wherein the first feed port is arranged on the cavity wall in the middle of the material cavity of the first plunger pump 10, and is communicated with the material cavity of the first plunger pump 10, the second feed port is arranged on the cavity wall in the middle of the material cavity of the second plunger pump 11, and is communicated with the material cavity of the second plunger pump 11, the first discharge port is arranged on the cavity wall at the end of the material cavity of the first plunger pump 10, and is communicated with the material cavity of the first plunger pump 10, and the second discharge port is arranged on the cavity wall at the end of the material cavity of the second plunger pump 11, and is communicated with the material cavity of the second plunger pump 11. Taking the first oil cylinder 3 as an example, when the piston mechanism of the first oil cylinder 3 drives the first plunger pump 10 to perform material filling operations, the first discharge port gate is closed, the first feed port gate is opened, and the piston mechanism moves in the direction away from the first discharge port, and the material enters the material chamber of the first plunger pump 10 through the first discharge port; when the piston mechanism moves to the farthest point in the material chamber from the first discharge port, the working state changes to a pushing state. At this time, the first discharge port gate is opened, and the first feed port gate is closed. As the piston mechanism gradually approaches the first discharge port, the material in the material chamber of the first plunger pump 10 is pushed out of the material chamber of the first plunger pump 10 through the first discharge port.

[0049] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A single hydraulic pump double plunger pump pumping equipment, characterized in that: include: Main pump (1); A main reversing valve (8), comprising an oil inlet, a first working oil port and a second working oil port, wherein the oil inlet is connected to the main pump (1); A first oil cylinder (3), wherein the rodless chamber oil port of the first oil cylinder (3) is connected to the first working oil port of the main reversing valve (8); A second oil cylinder (4), wherein the rodless chamber oil port of the second oil cylinder (4) is communicated with the second working oil port of the main reversing valve (8), and the rod chamber oil port of the first oil cylinder (3) is communicated with the rod chamber oil port of the second oil cylinder (4); A first plunger pump (10), driven by the first oil cylinder (3); A second plunger pump (11), driven by the second oil cylinder (4), Wherein: the main pump (1) drives the first plunger pump (10) and the second plunger pump (11) simultaneously through the main reversing valve (8), and the first plunger pump (10) and the second plunger pump (11) operate alternately.

2. The single hydraulic pump dual plunger pump pumping equipment according to claim 1, characterized in that: A first balancing valve (2) is provided between the rodless chamber oil port of the first oil cylinder (3) and the first working oil port of the main reversing valve (8).

3. The single hydraulic pump dual plunger pump pumping equipment according to claim 1, characterized in that: A second balancing valve (5) is provided between the rodless chamber oil port of the second oil cylinder (4) and the second working oil port of the main reversing valve (8).

4. The single hydraulic pump dual plunger pump pumping equipment according to claim 2, characterized in that: The main reversing valve (8) also includes an oil return port, which is connected to the oil tank (9).

5. The single hydraulic pump dual plunger pump pumping equipment according to claim 2, characterized in that: Also includes: A first auxiliary reversing valve (7), wherein the oil inlet of the first auxiliary reversing valve (7) is connected to the main pump (1), the first working oil port of the first auxiliary reversing valve (7) is connected to the rodless chamber oil port of the first oil cylinder (3); and the second working oil port of the first auxiliary reversing valve (7) is connected to the rod chamber oil port of the first oil cylinder (3).

6. The single hydraulic pump dual plunger pump pumping equipment according to claim 5, characterized in that: The connection point between the first working oil port of the first auxiliary reversing valve (7) and the rodless chamber oil port of the first oil cylinder (3) is located between the rodless chamber oil port of the first oil cylinder (3) and the first working oil port of the first balancing valve (2).

7. The single hydraulic pump dual plunger pump pumping equipment according to claim 3, characterized in that: Also includes: A second auxiliary reversing valve (6), the oil inlet of the second auxiliary reversing valve (6) is connected to the main pump (1), the first working oil port of the second auxiliary reversing valve (6) is connected to the rodless chamber oil port of the second cylinder (4); the second working oil port of the second auxiliary reversing valve (6) is connected to the rod chamber oil port of the second cylinder (4).

8. The single hydraulic pump dual plunger pump pumping equipment according to claim 7, characterized in that: The connection point between the first working oil port of the second auxiliary reversing valve (6) and the rodless chamber oil port of the second oil cylinder (4) is located between the rodless chamber oil port of the second oil cylinder (4) and the first working oil port of the second balancing valve (5).

9. The single hydraulic pump dual plunger pump pumping equipment according to any one of claims 1 to 8, characterized in that: The single hydraulic pump dual plunger pump pumping equipment also includes: A first plunger pump (10) and a second plunger pump (11) having a material cavity; A material inlet, the material inlet being arranged on the wall of the material cavity of the first plunger pump (10) and the second plunger pump (11); A gate device is provided between the material port and the material chamber, and the gate device comprises a gate plate, and the gate plate performs reciprocating motion to open or close the material port.

10. The single hydraulic pump dual plunger pump pumping equipment according to claim 9, characterized in that: The material port comprises: A first feed inlet, the first feed inlet being arranged on a cavity wall in the middle of a cavity of the first plunger pump (10) and being in communication with the cavity of the first plunger pump (10); A second feed inlet, the second feed inlet being arranged on a cavity wall in the middle of a cavity of the second plunger pump (11) and being in communication with the cavity of the second plunger pump (11); A first discharge port, the first discharge port being arranged on the cavity wall at the end of the cavity of the first plunger pump (10) and being in communication with the cavity of the first plunger pump (10); A second discharge port, wherein the second discharge port is arranged on the cavity wall at the end of the cavity of the second plunger pump (11) and is communicated with the cavity of the second plunger pump (11).

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