TW202000532A - High-pressure pump and fluid infusion system of using the same - Google Patents

Abstract

A high-pressure pump has an accommodating space in the axial direction of a cylinder. An outlet is formed at the surface of the cylinder and connected to the accommodating space. A piston rod is movably disposed in the accommodation space of the cylinder. A control valve has an inlet, which is a one-way valve and disposed at one end of the cylinder. A gap is formed between the outer wall surface of the piston rod and the inner wall surface of the accommodating space. The liquid material enters the accommodating space from the inlet and is not confined by the control valve. The piston rod moves toward the inlet, then squeeze the liquid material through the gap and output from the outlet. In this way, it is able to achieve the effect of outputting the liquid material in a minute amount and to provide the convenience of operation and the effect of controlling the precision output.

Description

High-pressure plunger pump and conveying system using the high-pressure plunger pump

The invention relates to the technical field of a pumping and infusion system, in particular to a high-pressure plunger pump used for mixing foamed materials and a delivery system using the high-pressure plunger pump.

The application of materials for two-liquid mixed perfusion manufacturing is very common. For example, PU foam materials are used for heat insulation, wood imitation, self-forming, packaging, and reinforcement. FRP is used in the manufacture of hulls and tank waves. Such materials are mainly formed by mixing and pouring liquid A and liquid B (or black material and white material).

Liquid A and liquid B are contained in a predetermined cylinder. When mixing, it is necessary to match the appropriate output device to mix the liquid output. For example, the Taiwan Patent Publication No. 184221 discloses a two-liquid mixing and filling machine raw material constant pressure automatic supply system, which mainly uses compressed air as a power source, and an automatic control circuit composed of an actuating valve and a pneumatic valve to promote two pneumatic cylinders Push the plunger pump to convey the entire conveying system of raw materials, that is, open the compressed air of the air compressor, and actuate the automatic control circuit, so that the two pneumatic cylinders circulate in the opposite direction and return, which relatively drives the two groups of plunger pump The raw materials are pumped into the pressure storage cylinders, and then the feed pipes conduct the output.

However, in the previous case of this patent, the ratio of the cross-sectional area between the cylinder bore of the pneumatic cylinder, the diameter of the plunger shaft, and the size of the diameter of the discharge hole, together with the adjustment of the pressure regulating valve, can effectively control the feed pressure and output of the raw material. The design of the previous case of this patent has the disadvantage of inconvenient operation and use.

The purpose of the present invention is to solve the shortcomings of the conventional high-pressure plunger pump with complicated structure, inconvenient operation and inaccurate output proportional control.

The present invention provides a high-pressure plunger pump, which has the effect of providing a simplified structure and easy control of output.

The present invention provides a delivery system pumped with a high-pressure plunger, which has the effect of providing easy operation and accurate output.

In order to achieve the above purpose and effect, the high-pressure plunger pump disclosed in the present invention has a housing space in the axial direction of a cylinder, and a discharge port on the outer surface, and the discharge port communicates with the accommodation space; A piston rod is movably arranged in the accommodating space of the cylinder; a control valve is a one-way valve and is arranged at one end of the cylinder, the control valve has a feed inlet; in particular, a gap is formed Between the outer wall surface of the piston rod and the inner wall surface of the accommodating space; in this way, the liquid material enters the accommodating space from the feed port and is restricted by the control valve so as not to cause reverse flow; the plug rod is directed toward the feed port When moving, the liquid material is pressed through the gap and output from the discharge port. In this way, the effect of outputting the liquid material in a small amount can be achieved.

The conveying system disclosed in the present invention includes a barrel for containing liquid materials; a plunger pump set includes at least two plunger pumps connected to the barrel, wherein each plunger pump structure is as described above; a switch The valve communicates with the discharge port of each plunger pump and has an output port. The switching valve changes the conduction direction, so that different liquid materials output by the plunger pump can be output from the output port. This achieves the effect of convenient operation and precise control of output.

Please refer to FIG. 1, which shows a plunger pump system including a cylinder 10, a piston rod 20, and a control valve 30, and the plunger pump can be connected to a driving mechanism 40, and by the driving mechanism 40 to encourage the plunger pump to pump liquid material and output liquid material.

Please refer to FIG. 2, the cylindrical body 10 has an accommodating space 12 in the axial direction, and an outlet 14 on the outer surface, and the outlet 14 communicates with the accommodating space 12. The piston rod 20 is movably arranged in the accommodating space 12 of the barrel 10. In particular, a gap 22 is formed between the outer wall surface of the piston rod 20 and the inner wall surface of the accommodating space 12; the control valve 30 is a one-way valve and is disposed at one end of the cylindrical body 10. The control valve 30 has a feed inlet 32. The driving mechanism 40 includes a screw 42 connected to a motor 44, and the screw 42 is connected to the piston rod 20.

Please refer to FIG. 3, according to the illustrated direction, the driving mechanism 40 drives the piston rod 20 to move upward, then the combination of the barrel 10 and the piston rod 20 can provide a drawing force, and through the control valve 30 of the The feeding port 32 performs a pumping action on the predetermined liquid material, so that the liquid material can pass through the control valve 30 and enter the accommodating space 12 of the barrel 10.

Please refer to FIG. 4, since the liquid is incompressible, the driving mechanism 40 drives the piston rod 20 to move toward the inlet 32 (as shown, the piston rod 20 moves downward), then the piston rod 20 will Pressing the liquid material causes the liquid material to be squeezed into the gap 22, and the liquid material will be output upward from the discharge port 14.

As mentioned above, the plunger pump has a simplified structure. In addition, since the control valve 30 is a one-way valve, the liquid material can be restricted by the control valve 30 without coming back when entering or output from the plunger pump.

In addition, the motor 44 drives the screw 42 to rotate so that the piston rod 12 generates a linear displacement. The displacement stroke of the piston rod 12 can be precisely controlled, thereby achieving precise control of the liquid material passing through the gap 22 from the discharge port 14 The output volume at the time of output. Furthermore, in the state where the plunger pump is upright, the discharge port 14 is higher than the intake port 32, so each time the liquid material is drawn up and output, the probability of the air entering the barrel 10 can be reduced.

Please refer to FIG. 5, a plunger pump liquid supply system can be formed by using at least two of the plunger pumps together with an appropriate fluid circuit design. The plunger pump liquid supply system includes a barrel 50, two plunger pumps 60 and 70, a pressure detector 80 and a switching valve 90.

The barrel 50 is used to contain the liquid material. The barrel 50 is connected to the plunger pumps 60 and 70 by suitable tubes 52 and 54, wherein the tube 54 is used to connect the two plunger pumps 60 and 70, and the pressure detector 80 is connected to the管体54. The body 54. Therefore, the pressure detector 80 can be used to detect the internal pressure changes of the plunger pumps 60 and 70. Secondly, the switching valve 90 has an output port 92 through which the liquid material output by the plunger pumps 60 and 70 is output to a predetermined position.

Please refer to FIG. 6, the structure of the plunger pumps 60 and 70 is the same as the previous embodiment. In other words, the plunger pumps 60 and 70 both include a cylinder 61, 71 with a piston rod 62, 72 that can be moved up and down in the axial direction; one end of the piston rod 62, 72 is connected to a drive mechanism 100, 110 One screw 102, 112. In addition, one ends of the cylinders 61 and 71 are equipped with a control valve 64, 74; the outer surface of the cylinder 61, 71 has a discharge port 66, 76, the control valve 64, 74 has a feed port 68 , 78. A gap 69, 79 is formed between the outer surface of the piston rods 62, 72 and the inner wall surface of the cylinder 61, 71 in the axial direction.

Please refer to FIG. 7 again, the switching valve 90 is connected to the discharge ports 68 and 78 of the plunger pumps 60 and 70 through an appropriate pipe 94, and the control valves 64, 74 and the switching valve 90 are appropriately The body 96 is connected. The above-mentioned switching valve 90 is a three-way valve, the pressure value of the plunger pumps 60 and 70 detected by the pressure detector 80, and the switching valve 90 is caused to change the conduction direction according to the pressure value.

Please refer to FIG. 8, the piston rod 62 of the plunger pump 60 presses down the liquid material to output. When the piston rod 62 descends to a predetermined height, and the pressure detector 80 detects that the pressure value of the plunger pump 60 meets the predetermined pressure, the plunger pump 70 enters a state to be actuated. As the plunger pump 60 descends for a short distance, the pressure detector 80 can issue a control signal to cause the switching valve 90 to change the conduction direction.

Please refer to FIG. 9, then the piston rod 72 of the plunger pump 70 is displaced downward to output the liquid material; at the same time, the piston rod 62 of the plunger pump 60 is displaced upward to reabsorb the liquid material. When the piston rod 72 is lowered to a predetermined height so that the pressure detector 80 detects that the pressure value of the plunger pump 70 conforms to the predetermined pressure, the pressure detector 80 may issue a control signal to prompt the switching valve 90 changes the conduction direction and causes the piston rod 62 of the plunger pump 60 to move downward again to squeeze the liquid material.

It is worth noting that the process of the two plunger pumps 60 and 70 exchanging the liquid material in the barrel 50 can be detected by the pressure detector 80 of the two plunger pumps 60 and 70 Pressure, and even more, the switching process of the plunger pumps 60, 70 can be matched (or synchronized displacement) behavior, so that the piston rods 62, 72 can be displaced in the direction of equal pressure Switch. The timing of the above preload (or synchronous displacement) can be detected and activated by an appropriate sensor. In this way, not only can the plunger pumps 60 and 70 be used to output the liquid material in a small amount, but also can provide the effect of simple operation and stable and accurate output of the liquid material.

The above-mentioned embodiments are merely illustrative for explaining the technology and effects of the present invention, rather than limiting the present invention. Any person familiar with this technology can modify and change the above embodiments without violating the technical principle and spirit of the present invention. Therefore, the scope of protection of the rights of the present invention should be as listed in the patent application scope described later .

10‧‧‧Cylinder 12‧‧‧Accommodation space 14‧‧‧Discharge port 20‧‧‧Piston rod 22‧‧‧Gap 30‧‧‧Control valve 32‧‧‧‧Feed port 40‧‧‧Drive mechanism 42‧‧‧Screw 44‧‧‧Motor 50‧‧‧Cylinder 60‧‧‧Piston pump 61‧‧‧Cylinder 62‧‧‧Piston rod 64‧‧‧‧Control valve 66‧‧‧Discharge port 68 ‧‧‧ Feed port 69‧‧‧Gap 70‧‧‧ Plunger pump 71‧‧‧Cylinder 72‧‧‧Piston rod 74‧‧‧Control valve 76‧‧‧Discharge port 78‧‧‧ Feed Port 79‧‧‧ gap 80‧‧‧ pressure detector 90‧‧‧ switching valve 92‧‧‧ output port 94‧‧‧ tube 96‧‧‧ tube 100‧‧‧ drive mechanism 102‧‧‧screw 110 ‧‧‧ drive mechanism 112‧‧‧screw

Figure 1 is an external view of the plunger pump of the present invention. Figure 2 is a schematic diagram of the plunger pump structure of the present invention. Figure 3 is a schematic diagram of the plunger pump pumping action of the present invention. Fig. 4 is a schematic diagram of the action of the plunger pump of the present invention to output the liquid. Figure 5 is an external view of the output system of the present invention. Figure 6 is a schematic diagram of the plunger pump structure of the output system of the present invention. Figure 7 is a schematic diagram of the output system structure of the present invention. Figure 8 is a schematic diagram 1 of the operation of the output system of the present invention to output material liquid. FIG. 9 is a second schematic diagram of the operation of the output system of the present invention to output material liquid.

10‧‧‧Cylinder

20‧‧‧piston rod

30‧‧‧Control valve

40‧‧‧Drive mechanism

Claims (8)

A high-pressure plunger pump structure is used to output a small amount of liquid material, which includes: a cylinder, which has an accommodating space in the axial direction, and a discharge port on the outer surface, and the discharge port is in communication The accommodating space; a piston rod is movably arranged in the accommodating space of the cylinder; a gap is formed between the outer wall surface of the piston rod and the inner wall surface of the accommodating space; a control valve, The control valve is a one-way valve and is arranged at one end of the cylinder. The control valve has a feed inlet; the liquid material enters the accommodating space from the feed inlet and is restricted by the control valve to prevent backflow, the plug rod Moving toward the inlet port at the lower position, the liquid material is pressed through the gap and output from the outlet port at the higher position. The high-pressure plunger pump structure as described in item 1 of the patent application scope further includes a driving mechanism connected to the piston rod, the driving mechanism including a screw connected to a motor, the screw connected to the piston rod, and the motor used to drive the The screw and the piston rod are connected to produce displacement. The high-pressure plunger pump structure as described in item 1 of the patent scope, wherein the control valve is a one-way valve. A high-pressure plunger pump conveying system, comprising: a barrel for accommodating liquid materials; a plunger pump set, which includes at least two plunger pumps and is connected to the barrel, wherein each of the columns The plug pump system includes: a cylindrical body with an accommodating space in the axial direction, and a discharge port on the outer surface, and the discharge port communicates with the accommodating space; a piston rod is equipped with a movable configuration In the accommodating space of the cylinder; a gap is formed between the outer wall surface of the piston rod and the inner wall surface of the accommodating space; a control valve is a one-way valve and is arranged at one end of the cylinder, The control valve has a feed port; a switching valve is connected to the discharge port of each plunger pump, and has an output port; the liquid material enters the accommodating space from the feed port and is controlled by the The valve restricts no reverse flow; the piston rod moves in the direction of the inlet at the lower position, then the liquid material is pressed through the gap to output from the outlet at the higher position; the switching valve By changing the conduction direction, the liquid material output by different plunger pumps can be output from the output port. The high-pressure plunger pumping and conveying system as described in item 4 of the patent application scope includes at least two driving mechanisms, each of which is connected to the piston rod of the plunger pump, and the driving mechanism includes a screw connecting a A motor, the screw is connected to the piston rod, and the motor is used to drive the screw and the piston rod to generate displacement. The high-pressure plunger pump delivery system as described in item 4 of the patent application scope, wherein the control valve is a one-way valve. The plunger pump liquid supply system as described in item 4 of the patent application scope further includes a pressure detector connected to each plunger pump to detect the pressure value of each plunger pump , And issue a control signal to cause the switching valve to change the conduction direction. The plunger pump liquid supply system as described in item 7 of the patent application scope, wherein the switching valve is a three-way valve and is controlled by the pressure detector to change the conduction direction.

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