Double-cylinder plunger pump

Abstract

The utility model relates to a double-cylinder plunger pump which is used for solving the technical problems that an existing plunger pump can only pump materials with good fluidity and cannot pump materials with poor fluidity, and the material conveying process is discontinuous due to the fact that a piston is delayed in the material sucking and discharging process. The double-cylinder plunger pump comprises a hopper, a first cylinder body, a second cylinder body, a rotating shaft, a first piston, a second piston, a first driving mechanism, a second driving mechanism, a third driving mechanism and an S pipe, when the third driving mechanism drives the feeding end of the S pipe to be in butt joint with the feeding port corresponding to the first cylinder body through the rotating shaft, materials to be pumped are pumped out of the first cylinder body, and meanwhile the materials to be pumped are sucked into the second cylinder body. When the third driving mechanism drives the feeding end of the S pipe to be in butt joint with the corresponding feeding port of the second cylinder body through the rotating shaft, the to-be-pumped materials are pumped out of the second cylinder body, meanwhile, the to-be-pumped materials are sucked into the first cylinder body, and the S pipe is continuously matched with the two feeding ports and receives the to-be-pumped materials.

Description

Technical Field

[0001] The utility model relates to a double-cylinder plunger pump, which is suitable for materials with poor fluidity and high requirements for conveying continuity. Background Art

[0002] The pumping technology principle of existing plunger pumps is that the cylinder is fixed and negative pressure is generated in the cylinder through the movement of the piston, thereby sucking the material to be pumped into the cylinder and then pumping it out through the movement of the piston in the cylinder.

[0003] However, existing plunger pumps can only pump materials with good fluidity, but cannot pump materials with poor fluidity. In addition, there will be delays in the piston during the suction and discharge process, resulting in a discontinuous material conveying process. Therefore, its application has great limitations. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems that the existing plunger pump can only pump materials with good fluidity but cannot pump materials with poor fluidity, and the piston will be delayed during the suction and discharge process, resulting in a discontinuous material conveying process, and provide a double-cylinder plunger pump.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A double-cylinder plunger pump, which is special in that it includes a hopper, a first cylinder body, a second cylinder body, a rotating shaft, a first piston, a second piston, a first drive mechanism, a second drive mechanism, a third drive mechanism and an S-tube;

[0007] The hopper is used to hold the material to be pumped, and is provided with a discharge port and two feed ports, the two feed ports being connected to one end of the first cylinder body and one end of the second cylinder body respectively; the other end of the first cylinder body and the other end of the second cylinder body are respectively used to be connected to the mounting base;

[0008] The first piston is disposed in the first cylinder, and one side of the first piston is connected to the first drive mechanism. The first drive mechanism is used to drive the first piston to reciprocate along the central axis of the first cylinder, thereby pumping out or sucking in the material to be pumped; the second piston is disposed in the second cylinder, and one side of the second piston is connected to the second drive mechanism. The second drive mechanism is used to drive the second piston to reciprocate along the central axis of the second cylinder, thereby pumping out or sucking in the material to be pumped; the first piston and the second piston have the same movement speed and opposite movement directions;

[0009] The S-tube is arranged in the hopper, and its discharge end is rotatably connected to the discharge port, and the feed end is used to cooperate with the two feed ports respectively; the rotating shaft is an L-shaped structure, one end of which is fixedly connected to the discharge end of the S-tube and is coaxially arranged with the S-tube, and the other end passes through the hopper and is connected to the third driving mechanism. The third driving mechanism is used to drive the feed end of the S-tube to dock with the feed port corresponding to the first cylinder body through the rotating shaft when the first piston moves to the end in the opposite direction of the hopper, and drive the feed end of the S-tube to dock with the feed port corresponding to the second cylinder body through the rotating shaft when the second piston moves to the end in the opposite direction of the hopper;

[0010] The third driving mechanism has the same frequency as the first driving mechanism and the second driving mechanism.

[0011] Furthermore, the distance between the side wall of the feed end of the S-tube close to the bottom of the hopper and the bottom of the hopper is greater than or equal to 1 cm.

[0012] Furthermore, the port diameter of the feed end of the S-tube is greater than or equal to the diameters of the two feed ports.

[0013] Furthermore, the first driving mechanism and the second driving mechanism are both hydraulic cylinders, pneumatic cylinders or linear motors.

[0014] Furthermore, the third driving mechanism is a hydraulic cylinder, a pneumatic cylinder or a linear motor.

[0015] Furthermore, the hopper and the S-tube are both made of stainless steel.

[0016] Furthermore, there are two third drive mechanisms, and both third drive mechanisms are synchronized with the first drive mechanism and the second drive mechanism; one of the third drive mechanisms is arranged close to one side of the first cylinder body, and its output end is connected to the other end of the rotating shaft, and is used to drive the rotating shaft to drive the S-tube to dock with the corresponding feed port of the first cylinder body; the other third drive mechanism is arranged close to one side of the second cylinder body, and its output end is connected to the other end of the rotating shaft, and is used to drive the rotating shaft to drive the S-tube to dock with the corresponding feed port of the second cylinder body.

[0017] Furthermore, the third driving mechanism has two output ends; one of the output ends is connected to the other end of the rotating shaft, and is used to drive the rotating shaft to drive the S-tube to dock with the feed port corresponding to the first cylinder body; the other output end is connected to the other end of the rotating shaft, and is used to drive the rotating shaft to drive the S-tube to dock with the feed port corresponding to the second cylinder body.

[0018] Beneficial effects of the utility model:

[0019] 1. The utility model is a double-cylinder plunger pump, which adopts double cylinder bodies (i.e., the first cylinder body and the second cylinder body) for seamless switching, solves the discontinuity problem in the material conveying process and improves the conveying efficiency.

[0020] 2. The utility model is a double-cylinder plunger pump, which solves the problem that the existing plunger pump cannot pump materials with poor fluidity during use, and has a wider applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic top view of a double-cylinder plunger pump embodiment of the present invention;

[0022] Figure 2 It is a front view structural schematic diagram of an embodiment of a double-cylinder plunger pump of the present utility model.

[0023] Description of reference numerals:

[0024] 1-first driving mechanism, 2-first piston, 3-first cylinder, 4-hopper, 5-discharge port, 6-second driving mechanism, 7-second piston, 8-second cylinder, 9-S tube, 10-rotating shaft, 11-third driving mechanism. DETAILED DESCRIPTION

[0025] like Figure 1 、 Figure 2 As shown, a double-cylinder plunger pump includes a hopper 4, a first cylinder body 3, a second cylinder body 8, a rotating shaft 10, a first piston 2, a second piston 7, a first drive mechanism 1, a second drive mechanism 6, a third drive mechanism 11 and an S tube 9; the hopper 4 is used to hold the material to be pumped, and is provided with a discharge port 5 and two feed ports, which are respectively connected to one end of the first cylinder body 3 and one end of the second cylinder body 8; the other end of the first cylinder body 3 and the other end of the second cylinder body 8 are respectively used to be connected to the mounting seat.

[0026] The first piston 2 is arranged in the first cylinder body 3, and one side of it is connected to the first driving mechanism 1. The first driving mechanism 1 is used to drive the first piston 2 to reciprocate along the central axis of the first cylinder body 3, thereby pumping out or inhaling the material to be pumped; the second piston 7 is arranged in the second cylinder body 8, and one side of it is connected to the second driving mechanism 6. The second driving mechanism 6 is used to drive the second piston 7 to reciprocate along the central axis of the second cylinder body 8, thereby pumping out or inhaling the material to be pumped; the first piston 2 and the second piston 7 have the same movement speed and opposite movement directions, ensuring that the first piston 2 and the second piston 7 immediately move in the opposite direction when they each move to the end of one direction, without any pause in between, thereby ensuring the continuity of the discharge of the material to be pumped in the first cylinder body 3 and the second cylinder body 8.

[0027] The S tube 9 is arranged in the hopper 4, and its discharge end is rotatably connected to the discharge port 5, and the feed end is used to cooperate with the two feed ports respectively; the rotating shaft 10 is an L-shaped structure, one end of which is fixedly connected to the S tube 9 and is coaxially arranged with the discharge end of the S tube 9, and the other end passes through the hopper 4 and is connected to the third driving mechanism 11. The third driving mechanism 11 is used to drive the feed end of the S tube 9 to dock with the feed port corresponding to the first cylinder 3 through the rotating shaft 10 when the first piston 2 moves to the end in the opposite direction of the hopper 4, and drive the feed end of the S tube 9 to dock with the feed port corresponding to the second cylinder 8 through the rotating shaft 10 when the second piston 7 moves to the end in the opposite direction of the hopper 4.

[0028] Preferably, to facilitate the rotational docking of the S-tube 9 with the two feed ports, the distance between the sidewall of the feed end of the S-tube 9 near the bottom of the hopper 4 and the bottom of the hopper 4 is greater than or equal to 1 cm. The diameter of the port at the feed end of the S-tube 9 is greater than or equal to the diameter of the two feed ports. Both the hopper 4 and the S-tube 9 are made of stainless steel.

[0029] In this embodiment, the first drive mechanism 1 and the second drive mechanism 6 are both hydraulic cylinders, pneumatic cylinders, or linear motors, which are respectively connected to the first piston 2 and the second piston 7 so that the first piston 2 and the second piston 7 can reciprocate independently. The third drive mechanism 11 is used to cause the rotating shaft 10 to drive the feed end of the S-tube 9 to reciprocate between the two feed ports of the hopper 4. In this embodiment, there are two third drive mechanisms 11, and the two third drive mechanisms 11 are hydraulic cylinders, pneumatic cylinders, or linear motors, which are synchronized with the first drive mechanism 1 and the second drive mechanism 6. One of the third drive mechanisms 11 is disposed near one side of the first cylinder body 3, and its output end is connected to the other end of the rotating shaft 10, and is used to drive the rotating shaft 10 to drive the S-tube 9 to dock with the corresponding feed port of the first cylinder body 3; the other third drive mechanism 11 is disposed near one side of the second cylinder body 8, and its output end is connected to the other end of the rotating shaft 10, and is used to drive the rotating shaft 10 to drive the S-tube 9 to dock with the corresponding feed port of the second cylinder body 8. In other embodiments, the third drive mechanism 11 has two output ends; one of the output ends is connected to the other end of the rotating shaft 10 and is used to drive the rotating shaft 10 to drive the S-tube 9 to dock with the corresponding feed port of the first cylinder 3; the other output end is connected to the other end of the rotating shaft 10 and is used to drive the rotating shaft 10 to drive the S-tube 9 to dock with the corresponding feed port of the second cylinder 8. The first piston 2 can reciprocate within the first cylinder 3 under the drive of the first drive mechanism 1, and the second piston 7 can reciprocate within the second cylinder 8 under the drive of the second drive mechanism 6. One end of the S-tube 9 is fixedly connected to the rotating shaft 10, and the S-tube 9 can reciprocate along the rotating shaft 10 within the hopper 4 under the drive of the third drive mechanism 11.

[0030] When the two feed ports are located below the material to be pumped, the movement of the first piston 2 in the first cylinder 3 sucks the material to be pumped into the first cylinder 3, the feed end of the S-tube 9 rotates to face the first cylinder 3, the first piston 2 moves in the first cylinder 3 and discharges the material to be pumped through the discharge end of the S-tube 9. At the same time, the movement of the second piston 7 in the second cylinder 8 sucks the material to be pumped into the second cylinder 8, the feed end of the S-tube 9 rotates to face the second cylinder 8, the second piston 7 moves in the second cylinder 8 and discharges the material to be pumped through the discharge end of the S-tube 9.

[0031] The discharge end of the S-tube 9 always faces the discharge port 5 of the hopper 4. Driven by the third drive mechanism 11, the feed end of the S-tube 9 can swing back and forth along the rotation axis 10. The first and second cylinder bodies 3 and 8 remain stationary. During normal operation, the first and second pistons 2 and 7 move at the same speed but in opposite directions. Upon reaching the end of each direction, the first and second pistons 2 and 7 immediately reverse direction.

[0032] When the first piston 2 moves in the opposite direction of the hopper 4 until it stops under the drive of the first driving mechanism 1, the first cylinder 3 is filled with material, the feed end of the S tube 9 rotates to face the first cylinder 3 and remains stationary, and the first piston 2 moves toward the hopper 4 under the drive of the first driving mechanism 1, thereby pushing out the material to be pumped in the first cylinder 3 and discharging it to the discharge port 5 through the discharge end of the S tube 9.

[0033] When the second piston 7 moves in the opposite direction of the hopper 4 until it stops under the drive of the second driving mechanism 6, the second cylinder 8 is filled with material, the feed end of the S tube 9 rotates to face the second cylinder 8 and remains stationary, and the second piston 7 moves in the direction of the hopper 4 under the drive of the second driving mechanism 6, thereby pushing out the material in the second cylinder 8 and discharging it to the discharge port 5 through the discharge end of the S tube 9.

[0034] In this embodiment, the first drive mechanism 1, the second drive mechanism 6, and the third drive mechanism 11 are all reciprocating mechanisms, and their motion frequencies are consistent. Preferably, the first drive mechanism 1 and the second drive mechanism 6 are hydraulic cylinders, pneumatic cylinders, or linear motors, and the third drive mechanism 11 can be one of a hydraulic cylinder, a pneumatic cylinder, or a linear motor. The first drive mechanism 1 is connected to the first piston 2, the second drive mechanism 6 is connected to the second piston 7, and the third drive mechanism 11 is connected to the rotating shaft 10, thereby causing the first piston 2 in the first cylinder 3, the second piston 7 in the second cylinder 8, and the S-tube 9 in the hopper 4 to independently reciprocate.

[0035] The working process of the double-cylinder plunger pump of the utility model is specifically as follows:

[0036] First, the material to be pumped is added to the hopper 4, and the S-tube 9 is kept stationary. The first piston 2 is driven by the first driving mechanism 1 to move in the opposite direction of the hopper 4. During the movement of the first piston 2 in the opposite direction of the hopper 4, the material to be pumped in the hopper 4 is sucked into and fills the first cylinder 3. When the first piston 2 moves to the end in the opposite direction of the hopper 4, the S-tube 9 is driven by the third driving mechanism 11 to rotate to face the feed port corresponding to the first cylinder 3 and remains stationary. Then, the first piston 2 is driven by the first driving mechanism 1 to move in the direction of the hopper 4. During the movement of the first piston 2 in the direction of the hopper 4, the material to be pumped in the first cylinder 3 is pushed out and discharged to the discharge port 5 through the S-tube 9.

[0037] When the first piston 2 moves to the end toward the hopper 4, since the movement speeds of the first piston 2 and the second piston 7 are the same and the directions are always opposite, the second piston 7 also moves to the end in the opposite direction of the hopper 4 under the drive of the second drive mechanism 6. At the same time, the second cylinder 8 is also filled with the material to be pumped. At this time, the S tube 9 is driven by the third drive mechanism 11 to rotate to face the feed port corresponding to the second cylinder 8 and remain stationary. Then, the second piston 7 moves toward the hopper 4 under the drive of the second drive mechanism 6. During the leftward movement of the second piston 7, the material to be pumped in the second cylinder 8 is pushed out and discharged to the discharge port 5 through the S tube 9. The above process is repeated continuously to achieve continuous pumping of the material to be pumped.

Claims

1. A double-cylinder plunger pump, characterized in that: It comprises a hopper (4), a first cylinder (3), a second cylinder (8), a rotating shaft (10), a first piston (2), a second piston (7), a first driving mechanism (1), a second driving mechanism (6), a third driving mechanism (11) and an S-tube (9); The hopper (4) is used to hold the material to be pumped, and is provided with a discharge port (5) and two feed ports, the two feed ports being connected to one end of the first cylinder (3) and one end of the second cylinder (8) respectively; the other end of the first cylinder (3) and the other end of the second cylinder (8) are respectively used to be connected to the mounting seat; The first piston (2) is arranged in the first cylinder (3), and one side of the piston is connected to the first drive mechanism (1). The first drive mechanism (1) is used to drive the first piston (2) to reciprocate along the central axis of the first cylinder (3), thereby pumping out or sucking in the material to be pumped; the second piston (7) is arranged in the second cylinder (8), and one side of the piston is connected to the second drive mechanism (6). The second drive mechanism (6) is used to drive the second piston (7) to reciprocate along the central axis of the second cylinder (8), thereby pumping out or sucking in the material to be pumped; the first piston (2) and the second piston (7) move at the same speed and in opposite directions; The S-tube (9) is arranged in the hopper (4), and its discharge end is rotatably connected to the discharge port (5), and the feed end is used to respectively cooperate with the two feed ports; the rotating shaft (10) is an L-shaped structure, one end of which is fixedly connected to the S-tube (9) and coaxially arranged with the discharge end of the S-tube (9), and the other end passes through the hopper (4) and is connected to the third driving mechanism (11); the third driving mechanism (11) is used to drive the feed end of the S-tube (9) to dock with the feed port corresponding to the first cylinder (3) through the rotating shaft (10) when the first piston (2) moves to the end in the opposite direction of the hopper (4); and when the second piston (7) moves to the end in the opposite direction of the hopper (4), the feed end of the S-tube (9) is driven to dock with the feed port corresponding to the second cylinder (8) through the rotating shaft (10); The third driving mechanism (11) has the same frequency as the first driving mechanism (1) and the second driving mechanism (6).

2. A double-cylinder plunger pump according to claim 1, characterized in that: The distance between the side wall of the feed end of the S tube (9) close to the bottom of the hopper (4) and the bottom of the hopper (4) is greater than or equal to 1 cm.

3. A double-cylinder plunger pump according to claim 1 or 2, characterized in that: The diameter of the port of the feed end of the S tube (9) is greater than or equal to the diameter of the two feed ports of the hopper (4).

4. A double-cylinder plunger pump according to claim 3, characterized in that: The first drive mechanism (1) and the second drive mechanism (6) are both hydraulic cylinders, pneumatic cylinders or linear motors.

5. A double-cylinder plunger pump according to claim 4, characterized in that: The third driving mechanism (11) is a hydraulic cylinder, a pneumatic cylinder or a linear motor.

6. A double-cylinder plunger pump according to claim 5, characterized in that: The materials of the hopper (4) and the S-tube (9) are both stainless steel.

7. The double-cylinder plunger pump according to claim 1, characterized in that: There are two third drive mechanisms (11), and both third drive mechanisms (11) are synchronized with the first drive mechanism (1) and the second drive mechanism (6); one of the third drive mechanisms (11) is arranged near one side of the first cylinder (3), and its output end is connected to the other end of the rotating shaft (10), and is used to drive the rotating shaft (10) to drive the S-tube (9) to dock with the corresponding feed port of the first cylinder (3); the other third drive mechanism (11) is arranged near one side of the second cylinder (8), and its output end is connected to the other end of the rotating shaft (10), and is used to drive the rotating shaft (10) to drive the S-tube (9) to dock with the corresponding feed port of the second cylinder (8).

8. The double-cylinder plunger pump according to claim 1, characterized in that: The third driving mechanism (11) has two output ends; one of the output ends is connected to the other end of the rotating shaft (10) and is used to drive the rotating shaft (10) to drive the S-tube (9) to dock with the corresponding feed port of the first cylinder (3); the other output end is connected to the other end of the rotating shaft (10) and is used to drive the rotating shaft (10) to drive the S-tube (9) to dock with the corresponding feed port of the second cylinder (8).

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