TWI531724B - Linear fluid pressurized pump - Google Patents

Description

Linear fluid pressurizing pump

The present invention relates to a fluid pressurizing pump, and more particularly to a linear fluid pressurizing pump.

Referring to Fig. 1, a fluid pressurizing pump 1 generally applied to a high performance liquid chromatography (HPLC) is exemplified, and mainly comprises a carrier 11, a cartridge mounted on the carrier 11 along an axis X, and a fluid for entering and exiting. 12. Displaceable into a mast 13 of the cartridge 12 and a drive unit 14. The driving device 14 is mounted on the carrier 11 and has a slider 141 suspended in the carrier 11 along the axis X direction, a slider 142 displaced along the slider 141 and being fixed with the mast 13, along the A screw 143 that is threaded through the slider 141 in the direction of the axis X and horizontally juxtaposed with the mast 13, the slider 142, and a motor 144 that drives the rotation of the screw 143.

When the motor 144 drives the screw 143 to rotate in place, and the slider 142 is driven to slide along the slider 141, the mast 13 can be displaced along the axis X through the slider 142, so that the mast 13 is displaced. The fluid is pumped or squeezed into and out of the cartridge 12 for the purpose of pressurized delivery of fluid.

The high performance liquid chromatography is a precision instrument that must accurately control the flow rate, but the mast 13, the screw 143, and the sliding rod 141 are The horizontally juxtaposed state, and the sliding relationship between the slider 141 and the slider 142 is such that the round rod and the circular hole cooperate with each other. Therefore, when the screw 143 rotates, the slider 142 also follows the screw 143. Rotating to generate a slight offset around the slider 141, so that the thin and long mast 13 is easily broken when the same degree of collimation cannot be maintained with the axis X, and often accompanied by insufficient flow control. Missing.

Accordingly, it is an object of the present invention to provide a linear fluid pressurizing pump capable of maintaining a degree of collimation and improving flow control accuracy.

Thus, the linear fluid pressurizing pump of the present invention comprises a carrier, a cartridge, a mast, and a driving device. The cartridge is mounted on the carrier along an axis and is provided for fluid to enter and exit. The mast has a first end that penetrates the cartridge and a second end that exits the cartridge. The driving device is mounted on the carrier and has at least one sliding rail formed on the carrier along the axial direction, at least one slider that is displaced along the sliding rail and interlocked with the second end of the mast, and is screwed along the axis a screw that passes through the slider and is juxtaposed with the mast, and a motor that drives the rotation of the screw.

The effect of the invention is that the sliding relationship between the slider and the sliding rail is used to obtain the support of the mast through the portion of the cylinder, and the smoothness of the displacement of the mast can be improved, and the vertical direction along the axis is The parallel screw and the mast maintain the same linear motion of the mast and the screw, thereby maintaining the collimation of the mast and improving the accuracy of the flow control.

2‧‧‧ Carrier

21‧‧‧First end wall

22‧‧‧ second end wall

23‧‧‧ bottom wall

24‧‧‧ bracket

25‧‧‧Top cover

26‧‧‧ Groove

3‧‧‧唧

30‧‧‧ flow path

31‧‧‧Circle

32‧‧‧ Entrance

33‧‧‧Export

4‧‧‧ mast

41‧‧‧First end

42‧‧‧second end

43‧‧‧Chain head

5‧‧‧ drive

51‧‧‧Slide rails

52‧‧‧ Slider

521‧‧‧With the Ministry

522‧‧‧Perforation

523‧‧‧ convex rail

53‧‧‧ screw

54‧‧‧Motor

X‧‧‧ axis

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: FIG. 1 is a cross-sectional view illustrating a general linear fluid pressurizing pump; FIG. 2 is a perspective exploded cross-sectional view illustrating a line of the present invention. A first preferred embodiment of the fluid pressure pump; FIG. 3 is a perspective cross-sectional view of the first preferred embodiment; FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3; Figure 4 is a cross-sectional view taken along line VV; and Figure 6 is a cross-sectional view showing a second preferred embodiment of a linear fluid pressurizing pump of the present invention.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 2, FIG. 3, and FIG. 4 and FIG. 5, a first preferred embodiment of the linear fluid pressurizing pump of the present invention is suitable for conveying a micro flow rate (nano flow rate, or microliter flow rate) environment, including a carrier. 2. A cylinder 3, a mast 4, and a drive unit 5.

The carrier 2 has a first end wall 21 and a second end wall 22 facing each other at a distance from each other, a bottom wall 23 adjoining the first end wall 21 and the second end wall 22, and abutting the bottom wall And a bracket 24 located between the first end wall 21 and the second end wall 22, adjacent to the first end wall 21 and the second end wall 22 and opposite to a top cover 25 of the bottom wall 23, and formed Two recesses 26 on the inner surface of the top cover 25.

The cartridge 3 is mounted on the first end wall of the carrier 2 along an axis X 21 and having a ring wall 31 surrounding the axis X and defining a flow path 30, and at least one inlet 32 and at least one outlet 33 formed in the ring wall 31 and communicating with the flow path 30.

The mast 4 has a first end portion 41 penetrating the flow channel 30 of the cartridge 3, a second end portion 42 extending through the cartridge 3, and at least one peg 43 consolidating with the second end portion 42. .

The driving device 5 is mounted on the carrier 2 and has a slide rail 51, two sliders 52, a screw 53, and a motor 54. In the preferred embodiment, the slide rail 51 protrudes from the bottom wall 23 in the direction of the axis X and is located between the bracket 24 and the first end wall 21. The sliders 52 are displaced according to the slide rail 51, and respectively have a matching portion 521 formed on a bottom surface and slidingly sliding with the slide rail 51, a through hole 522 extending along the axis X, and formed on a top surface and Two convex rails 523 that are slid into the groove 26. The engagement portion 521 is a recess in the preferred embodiment. The through hole 522 is fixed to the bolt 43 so that the first end portion 41 of the mast 4 passes through the slider 52 and is interlocked with the slider 52 through the plug 43. The screw 53 is threaded through the slider 52 in the direction of the axis X and is juxtaposed with the mast 4 and the slide rail 51. The motor 54 is mounted to the second end wall 22 of the carrier 2 and is used to drive the screw 53 to rotate.

When the motor 54 drives the screw 53 to rotate in place, and the sliders 52 are driven to slide along the axis X direction, the masts 4 can be linked along the axis X through the sliders 52. Following the displacement of the flow passage 30, the mast 4 draws or squeezes fluid from the inlet 32 and the outlet 33 into and out of the cartridge 3 for the purpose of pressurized delivery of fluid.

Referring to FIG. 6, a second preferred embodiment of the present invention is shown. This is substantially the same as the first preferred embodiment, except that there is only one slider 52 of the drive unit 5. Thereby, the screw 53 can also be screwed through the aforementioned single slider 52 in the direction of the axis X and juxtaposed with the mast 4 and the slide rail 51.

In summary, the linear fluid pressure pump of the present invention has the following advantages and effects:

1. The present invention can utilize the sliding relationship between the sliders 52 and the slide rails 51 to allow the mast 4 to pass through the second end portion 42 of the cartridge 3 to obtain support, and can improve the displacement of the mast 4 Smoothness.

2, and because the mast 4, the screw 53 and the slide rail 51 are vertically juxtaposed along the axis X direction, the sliders 52 can be respectively coupled to the slide rail 51 and the top cover by the engaging portion 521 and the convex rail 523. The grooves 26 of 25 are mutually constrained, and the mast 4 is maintained in the same straight line (axis X) as the slider 52 does not deviate from the axis X, thereby maintaining the mast 4 The degree of collimation not only improves the service life, avoids the occurrence of breakage, but also improves the accuracy of flow control (especially the flow rate of nanoliters or microliters).

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

2‧‧‧ Carrier

21‧‧‧First end wall

22‧‧‧ second end wall

23‧‧‧ bottom wall

24‧‧‧ bracket

25‧‧‧Top cover

26‧‧‧ Groove

3‧‧‧唧

30‧‧‧ flow path

31‧‧‧Circle

32‧‧‧ Entrance

33‧‧‧Export

4‧‧‧ mast

41‧‧‧First end

42‧‧‧second end

43‧‧‧Chain head

5‧‧‧ drive

51‧‧‧Slide rails

52‧‧‧ Slider

521‧‧‧With the Ministry

522‧‧‧Perforation

523‧‧‧ convex rail

53‧‧‧ screw

54‧‧‧Motor

Claims (7)

A linear fluid pressure pump comprising: a carrier having a first end wall and a second end wall facing each other at a distance from each other, and a bottom wall adjacent to the first end wall and the second end wall a cylinder mounted on the first end wall of the carrier along an axis and for fluid to enter and exit; a mast having a first end penetrating the cartridge and a second end penetrating the cartridge And a driving device mounted on the carrier and having at least one sliding rail formed on the bottom wall of the carrier along the axial direction, at least one sliding along the sliding rail and interlocking with the second end of the mast a block, a screw threaded through the slider in the axial direction and juxtaposed with the mast, and a motor mounted on the second end wall of the carrier and driving the screw to rotate. The linear fluid pressurization pump of claim 1, wherein the carrier further has a bracket adjacent to the bottom wall and located between the first end wall and the second end wall, the slide rail being located at the bracket and the first The screw passes through the bracket between the ends of the wall. A linear fluid pressurizing pump according to claim 1, wherein the slider has a fitting portion formed on a bottom surface and slidably engaged with the slide rail. The linear fluid pressurizing pump according to claim 3, wherein the slide rail is a convex portion, and the engaging portion is a concave portion. The linear fluid pressurization pump of claim 3, wherein the carrier further has a top end adjacent to the first end wall and the second end wall and opposite to the bottom wall a cover and at least one groove formed on an inner surface of the top cover, the slider having at least one convex rail formed on a top surface and slidingly coupled to the groove. The linear fluid pressurizing pump of claim 1, wherein the slider has a through hole extending along the axis, the mast further having at least the second end fixed and being fixed in the through hole of the slider A peg. The linear fluid pressurizing pump of claim 1, wherein the cartridge has a ring wall surrounding the axis and defining a flow path, and at least one inlet and at least one outlet formed in the ring wall and communicating the flow path.