TWI664117B - High-pressure pump and fluid infusion system of using the same - Google Patents

Abstract

A high-pressure plunger pumping system has an accommodating space in an axially inner portion, and an outer surface has a discharge port, and the discharge port communicates with the accommodating space; a piston rod is movablely disposed in the cylinder body The control valve is a one-way valve and is disposed at one end of the cylinder. The control valve has an inlet port; in particular, a gap is formed on the outer wall surface of the piston rod and the receiving portion Between the inner wall surfaces of the space; the liquid material enters the accommodating space from the inlet port and is not restricted by the control valve; the plug rod moves toward the inlet port, and the liquid material is squeezed through the The gap is output from the discharge port. Thereby, the effect of outputting the liquid material in a small amount can be achieved. The plunger pump is connected to a barrel and a switching valve to form a conveying system, which provides the advantages of convenient operation and precise output control.

Description

High pressure plunger pumping and delivery system using the high pressure plunger pump

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

The application of materials in two-liquid mixing and infusion is very common. For example, PU foam materials are used for heat insulation, imitation wood, self-made skin, packaging, reinforcement, etc. FRP is applied to the manufacture of hulls and box waves, and so on. Such materials are mainly formed by mixing and mixing A liquid and B liquid (or black material and white material).

The A liquid and the B liquid system are housed in a predetermined barrel. Mix the liquid output with a suitable output device. For example, Taiwan Patent Publication No. 184221 discloses a two-liquid mixing and filling machine automatic pressure supply system for raw materials, which mainly uses compressed air as a power source, and an automatic control circuit is composed of an actuating valve and a pneumatic valve to promote two pneumatic cylinders. Pushing the entire conveying system of the plunger pump to transport the raw materials, that is, opening the air compressor compressed air, and actuating the automatic control loop, so that the two pneumatic cylinders are circulated in the opposite direction, returning to the action, and relatively driving the two sets of plunger pumps The raw materials are pumped into the accumulator cylinder, and then the feed tube conducts the output.

However, in the patent case, the ratio of the cross-sectional area between the cylinder bore and the plunger shaft diameter and the aperture size of the discharge hole, combined with the adjustment of the pressure regulating valve, can effectively control the raw material delivery pressure and output. The design of the prior patent has the disadvantage of being inconvenient to use.

The object of the present invention is to solve the defects of the conventional high-pressure plunger pumping structure being complicated, the operation being inconvenient, and the output proportional control being inaccurate.

The present invention provides a high pressure plunger pump that provides the ability to provide a streamlined structure and easy control of output.

The present invention provides a delivery system that uses high pressure plunger pumping, which provides the ability to provide easy operation and precise output.

In order to achieve the above object and effect, the high-pressure plunger pump disclosed in the present invention has an accommodating space in the axial direction of the inner cylinder, and the outer surface has a discharge port, and the discharge port communicates with the accommodating space; a piston rod is movably disposed in the accommodating space of the cylinder; a control valve is a one-way valve and is disposed at one end of the cylinder, the control valve has an 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; the liquid material enters the accommodating space from the inlet port and is not restricted by the control valve; the plug rod faces the inlet port Moving, the liquid material is squeezed out through the gap and outputted from the discharge port. Thereby, the effect of outputting the liquid material in a small amount can be achieved.

The conveying system disclosed in the present invention comprises a barrel for accommodating the liquid material; a plunger pumping group comprising at least two plunger pumps and connecting the barrel, wherein the plunger pumping structure is as described above; The valve communicates with the discharge port of each of the plunger pumps 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 convenience of operation and precise control of the output.

10‧‧‧Cylinder

12‧‧‧ accommodating space

14‧‧‧Outlet

20‧‧‧ piston rod

22‧‧‧ gap

30‧‧‧Control valve

32‧‧‧Inlet

40‧‧‧ drive mechanism

42‧‧‧ screw

44‧‧‧Motor

50‧‧‧Bowl

60‧‧‧Plunger pump

61‧‧‧Cylinder

62‧‧‧ piston rod

64‧‧‧Control valve

66‧‧‧Outlet

68‧‧‧Inlet

69‧‧‧ gap

70‧‧‧Plunger pump

71‧‧‧Cylinder

72‧‧‧ piston rod

74‧‧‧Control valve

76‧‧‧Outlet

78‧‧‧Inlet

79‧‧‧ gap

80‧‧‧ Pressure detector

90‧‧‧Switching valve

92‧‧‧Outlet

94‧‧‧pipe body

96‧‧‧ tube body

100‧‧‧ drive mechanism

102‧‧‧ screw

110‧‧‧ drive mechanism

112‧‧‧ screw

Figure 1 is a perspective view of a plunger pump of the present invention.

Figure 2 is a schematic view of the plunger pump structure of the present invention.

Figure 3 is a schematic view of the plunger pumping operation of the present invention.

Figure 4 is a schematic view showing the operation of the plunger pump output liquid of the present invention.

Figure 5 is an external view of the output system of the present invention.

Figure 6 is a schematic view of the plunger pumping structure of the output system of the present invention.

Figure 7 is a schematic view showing the structure of the output system of the present invention.

Figure 8 is a schematic view showing the operation of the output system of the present invention.

Figure 9 is a schematic view 2 of the operation of the output system of the present invention.

Referring to FIG. 1 , a plunger pumping system includes a cylinder 10 , a piston rod 20 and a control valve 30 , and the plunger pump can be coupled to a driving mechanism 40 , and the driving mechanism is driven by the driving mechanism. 40 to cause the plunger to pump to draw the liquid material and output the liquid material.

Referring to FIG. 2 , the cylindrical body 10 has an accommodating space 12 , and the outer surface has a discharge port 14 , and the discharge port 14 communicates with the accommodating space 12 . The piston rod 20 is movably disposed in the accommodating space 12 of the cylinder 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 cylinder 10. The control valve 30 has a feed port 32. The driving mechanism 40 includes a screw 42 coupled to a motor 44, and the screw 42 is coupled to the piston rod 20.

Referring to FIG. 3, in the illustrated direction, the driving mechanism 40 drives the piston rod 20 to move upward, and the combination of the cylinder 10 and the piston rod 20 can provide a drawing force and pass through the control valve 30. The inlet port 32 draws a predetermined liquid material, so that the liquid material can pass through the control valve 30 and enter the accommodating space 12 of the cylinder 10.

Referring to FIG. 4, since the liquid is incompressible, the driving mechanism 40 drives the piston rod 20 to move toward the inlet port 32 (as the piston rod 20 is displaced downward as shown), the piston rod 20 will The liquid material is squeezed such that the liquid material is squeezed into the gap 22 and the liquid material is output upward from the discharge port 14.

From the above, the plunger pump has a compact structure. In addition, since the control valve 30 is a one-way valve, the liquid material enters the plunger pump or is pumped from the plunger, and can be restricted by the control valve 30 without generating a reverse flow.

Moreover, the motor 44 drives the screw 42 to rotate to make the piston rod 12 linearly displaced, so that the displacement stroke of the piston rod 12 can be accurately controlled, thereby accurately controlling the liquid material passing through the gap 22 from the discharge port 14 The amount of output at the time of output. Moreover, in the state in which the plunger is pumped upright, the discharge port 14 is higher than the inlet port 32, so that the probability of air entering the inside of the cylinder 10 can be reduced each time the liquid material is drawn and output.

Referring to Figure 5, a plunger pumped liquid supply system can be constructed using at least two of the plunger pumps in combination with a suitable fluid circuit design. The plunger pumping liquid supply system includes a barrel 50, two plunger pumps 60 and 70, a pressure detector 80 and a switching valve 90.

The cartridge 50 is for accommodating the liquid material. The cartridge 50 is coupled to the plunger pumps 60 and 70 by suitable tubular bodies 52 and 54 for connecting the plunger pumps 60 and 70, and the pressure detector 80 is coupled thereto. Tube 54. The pressure detector 80 can be used to detect internal pressure changes of the plunger pumps 60 and 70. Next, the switching valve 90 has an output port 92 through which the liquid material outputted by the plunger pumps 60, 70 is output to a predetermined position.

Referring to Figure 6, the plunger pumps 60 and 70 have the same construction as the previous embodiment. In other words, the plunger pumps 60 and 70 each include a piston having an axially disposed internal displacement of the cylinders 61, 71. Rods 62, 72; one end of the piston rods 62, 72 is coupled to a screw 102, 112 of a drive mechanism 100, 110. In addition, one ends of the cylinders 61 and 71 are coupled to a control valve 64, 74; the outer surfaces of the cylinders 61, 71 have a discharge port 66, 76, and the control valves 64, 74 have an inlet 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 cylindrical body 61, 71 in the axial direction.

Referring again to Figure 7, the switching valve 90 is connected to the discharge ports 68 and 78 of each of the plunger pumps 60, 70 by a suitable tube 94, and the control valves 64, 74 and the switching valve 90 are appropriately The tube body 96 is connected. The above-mentioned switching valve 90 is a three-way valve, and the pressure detector 80 detects the pressure value of the plunger pump 60, 70, and causes the switching valve 90 to change the conduction direction according to the pressure value.

Referring to Figure 8, the piston rod 62 of the plunger pump 60 presses down the liquid material output. When the piston rod 62 is lowered to a predetermined height, and the pressure detector 80 detects that the pressure value of the plunger pump 60 meets a predetermined pressure, the plunger pump 70 enters a standby state. As the plunger pump 60 is lowered a further distance, the pressure detector 80 can issue a control signal to cause the switching valve 90 to change the conduction direction.

Referring to FIG. 9, the piston rod 72 of the plunger pump 70 is then displaced downward for outputting the liquid material; and the piston rod 62 of the plunger pump 60 is displaced upward to retrieve the liquid. material. When the piston rod 72 is lowered to a predetermined height such that the pressure detector 80 detects that the pressure value of the plunger pump 70 meets a predetermined pressure, the pressure detector 80 can send a control signal to urge the switching valve. 90 changes the conduction direction and causes the piston rod 62 of the plunger pump 60 to again displace downwardly to compress the liquid material.

It should be noted that, in the process of exchanging the plunger pumps 60 and 70 for outputting the liquid material in the barrel 50, the pressure detector 80 can detect the plunger pumps 60 and 70. Pressure, and even worse, the process of switching between the plunger pumps 60 and 70 can be matched with (or synchronous displacement) behavior. This allows the piston rods 62, 72 to be switched in the direction of displacement under equal pressure conditions. The timing of the above preloading (or synchronous displacement) can be detected and activated by a suitable sensor. Thus, not only can the plunger pumps 60, 70 be used to output the liquid material in a small amount, but also provide an easy operation and a stable and accurate output of the liquid material.

The above embodiments are merely illustrative of the technology of the present invention and its effects, and are not intended to limit the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the technical spirit and spirit of the present invention. Therefore, the scope of protection of the present invention should be as listed in the patent application scope mentioned later. .

Claims (5)

A high pressure plunger pump delivery system comprising: a barrel for accommodating liquid material; a plunger pumping group comprising at least two plunger pumps connected to the barrel, wherein each column The plug pump system comprises: a cylinder body having an accommodating space in an axial inner portion, and an outer surface having a discharge port, wherein 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 disposed at one end of the cylinder body, The control valve has a feed port; a switching valve is connected to the discharge port of each of the plunger pumps, and has an output port; the liquid material enters the accommodating space from the inlet port and is controlled by the control The valve restriction does not generate a reverse flow; the piston rod moves toward the feed port at a lower position, and the liquid material is squeezed out through the gap to output from the discharge port at a higher position; the switching valve Changing the conduction direction, the different liquid materials output by the plunger pump can be made by Output port output. The high-pressure plunger pump delivery system of claim 1, comprising at least two driving mechanisms, each of the driving mechanisms is coupled to the plunger-pumped piston rod, the driving mechanism comprising a screw connecting a motor The screw is coupled to the piston rod, and the motor is configured to drive the screw and interlock the piston rod to generate displacement. The high pressure plunger pump delivery system of claim 1, wherein the control valve is a one-way valve. The plunger pumping liquid supply system of claim 1, further comprising a pressure detector connected to each of the plunger pumps for detecting the pressure value of each of the plunger pumps And issuing a control signal to cause the switching valve to change the conduction direction. The plunger pumping liquid supply system of claim 4, wherein the switching valve is a three-way valve and is controlled by the pressure detector to change a conduction direction.