Hydraulic controllable axial compression supercharging device and chromatography system applying same

Abstract

The utility model discloses a hydraulically controllable axial compression supercharging device and a chromatography system using the same. The device comprises a supercharger and a hydraulic control two-position three-way valve, wherein the supercharger is internally provided with a high-pressure cavity and a low-pressure cavity; the high-pressure cavity is connected with an oil inlet, one end of the low-pressure cavity is provided with a first inlet and outlet and a second inlet and outlet, and the other end is provided with a third inlet and outlet; wherein the oil inlet is connected with the P end of the hydraulic control two-position three-way valve, the first inlet-outlet is connected with the oil return port, the second inlet-outlet is connected with the A end of the hydraulic control two-position three-way valve, and the third inlet-outlet is connected with the B end of the hydraulic control two-position three-way valve. According to the hydraulically-controllable axial compression supercharging device and the chromatographic system applying the same, under the condition that the hydraulic requirement is met, the size of the hydraulic oil cylinder is reduced, the overall weight is reduced, and supercharging can be achieved to achieve large thrust; and in addition, the thrust of various hydraulic oil cylinders can be met, and any medium can be quickly adapted.

Description

Technical Field

[0001] The utility model relates to the field of preparative chromatography separation, purification and extraction, and in particular to a hydraulically controllable axial compression and boosting device and a chromatography system using the same. Background Art

[0002] The principle of axial compression technology is to use a piston to install the column, while keeping the column bed compressed and stable during operation. In the prior art, a driving pump plus a hydraulic cylinder is generally used to allow hydraulic oil to enter the hydraulic cylinder oil inlet from the oil tank, drive the piston of the hydraulic cylinder to move downward, and at the same time, the hydraulic oil at the outlet of the hydraulic cylinder flows back to the oil tank.

[0003] Among them, in order to meet different hydraulic cylinder pressures, the general solution is to use a hydraulic booster cylinder to increase the pressure of the high-pressure branch, but its disadvantages are as follows:

[0004] 1. The hydraulic booster cylinder is bulky and difficult to install;

[0005] 2. The boosting capacity of the hydraulic booster cylinder is limited, which is not conducive to the implementation of standardization;

[0006] 3. After each boosting, the direction must be reversed to boost again, which will cause boosting pauses and pressure drops, which is not conducive to the implementation of continuous processes;

[0007] 4. The outside of the booster cylinder needs to be connected to a reversing valve, which increases costs and control.

[0008] In addition, there is another way to use hydraulic oil pumps of different grades, but its disadvantages are as follows:

[0009] 1. The hydraulic pressure under different processes is different, which will inevitably cause the hydraulic oil pump volume to be too large under low pressure requirements;

[0010] 2. The high-pressure pump needs to be connected to the motor, which increases the cost;

[0011] 3. The pressure of a high-pressure pump generally cannot exceed 35MPa. If a higher pressure is required, an ultra-high-pressure pump must be used, which further increases the cost. Utility Model Content

[0012] In order to solve the above problems, the utility model provides a hydraulically controllable axial compression booster device and a chromatography system using the same, which can reduce the size of the hydraulic cylinder and reduce the overall weight by 1 / 4 while meeting the hydraulic requirements, and can increase the pressure to achieve a large thrust; in addition, it can also meet the thrust of a variety of hydraulic cylinders and quickly adapt to any medium.

[0013] According to one aspect of the utility model, a hydraulically controllable axial compression boosting device is provided, comprising a booster and a hydraulically controlled two-position three-way valve, wherein the booster has a high-pressure chamber and a low-pressure chamber inside; the high-pressure chamber is connected to an oil inlet, and one end of the low-pressure chamber is respectively provided with a first inlet and a second inlet, and the other end is provided with a third inlet;

[0014] Among them, the oil inlet is connected to the P end of the hydraulically controlled two-position three-way valve, the first inlet and outlet are connected to an oil return port, the second inlet and outlet are connected to the A end of the hydraulically controlled two-position three-way valve, and the third inlet and outlet are connected to the B end of the hydraulically controlled two-position three-way valve.

[0015] In some embodiments, movable pistons are disposed inside the high-pressure chamber and the low-pressure chamber. The invention is beneficial in that the internal structures of the high-pressure chamber and the low-pressure chamber of the supercharger are described.

[0016] In some embodiments, the two pistons are connected by a connecting rod. The benefit lies in that the internal structure of the supercharger is further described.

[0017] In some embodiments, the high pressure chamber is connected to the oil inlet via a one-way valve. The benefit is that the flow direction of the oil can be controlled by providing the one-way valve.

[0018] In some embodiments, the hydraulically controlled two-position three-way valve is at the oil return position when the A end and the B end are connected, and is at the oil filling position when the P end and the B end are connected. The benefit of this is that the settings of each end of the hydraulically controlled two-position three-way valve are described.

[0019] In some embodiments, the hydraulically controlled two-position three-way valve is a hydraulically controlled reversing valve. The invention is beneficial in that the types of hydraulically controlled two-position three-way valves are described.

[0020] In order to solve the above problems, the utility model provides a chromatography system using the above hydraulically controllable axial compression and boosting device, comprising the above compression and boosting device, a hydraulic oil cylinder, an oil tank, an electromagnetic three-position four-way reversing valve, a double-head pneumatic pump and a two-position four-way valve, wherein the hydraulic oil cylinder and the oil tank are both on the chromatography column;

[0021] The oil inlet and the oil return port of the compression and boosting device are respectively connected to the T end and the P end of the electromagnetic three-position four-way reversing valve, the P end of the electromagnetic three-position four-way reversing valve is connected to the upper end of the hydraulic cylinder through a POV hydraulically controlled one-way valve, and the T end is connected to the lower end of the hydraulic cylinder, and the high-pressure chamber of the compression and boosting device is connected to the upper end of the hydraulic cylinder through a one-way valve;

[0022] The double-head pneumatic pump is respectively connected to the A end of the electromagnetic three-position four-way reversing valve, the outlet end of the oil tank, and the A end and the B end of the two-position four-way reversing valve, and the B end of the electromagnetic three-position four-way reversing valve is connected to the inlet end of the oil tank;

[0023] The P end of the two-position four-way valve is connected to the air inlet, and the E end is connected to the air outlet.

[0024] In some embodiments, the upper end of the hydraulic cylinder has an upper oil inlet and outlet, and the lower end has a lower oil inlet and outlet, wherein the P end of the electromagnetic three-position four-way reversing valve and the high-pressure chamber are both connected to the upper oil inlet and outlet, and the T end of the electromagnetic three-position four-way reversing valve is connected to the lower oil inlet and outlet. The benefit lies in that the specific structure and connection method of the hydraulic cylinder are described.

[0025] In some embodiments, the double-head pneumatic pump has a first oil outlet, a second oil outlet, a first oil inlet, a second oil inlet, a first air inlet and an outlet, and a second air inlet and an outlet, wherein the first oil outlet and the second oil outlet are connected to the A end of the electromagnetic three-position four-way reversing valve, the first oil inlet and the second oil inlet are connected to the outlet end of the oil tank, and the first air inlet and an outlet are connected to the A end and the B end of the two-position four-way valve, respectively. The benefit lies in that the specific structure and connection method of the double-head pneumatic pump are described.

[0026] In some embodiments, a safety valve is provided between the A end of the electromagnetic three-position four-way reversing valve and the oil tank. The benefit of this is that the safety valve can ensure the safety of oil flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a chromatography system using a hydraulically controllable axial compression booster device during rapid oil filling in one embodiment of the utility model;

[0028] Figure 2 for Figure 1 The schematic diagram of the supercharger state switching is shown;

[0029] Figure 3 for Figure 1 A schematic diagram of a chromatography system piston applying positive pressure to a hydraulically controllable axial compression booster device is shown;

[0030] Figure 4 for Figure 3 The schematic diagram of the supercharger state switching is shown;

[0031] Figure 5 for Figure 1 A schematic diagram of a chromatography system booster high pressure chamber when oil is filled using a hydraulically controllable axial compression booster device is shown;

[0032] Figure 6 for Figure 5 Schematic diagram of the supercharger when reaching the pressure value shown;

[0033] Figure 7 for Figure 1 A schematic diagram of a chromatography system unloading oil using a hydraulically controllable axial compression booster device is shown.

[0034] In the figure: axial compression boosting device 1, hydraulic cylinder 2, oil tank 3, electromagnetic three-position four-way reversing valve 5, double-head pneumatic pump 6, two-position four-way valve 7, safety valve 8, booster 11, high-pressure chamber 12, low-pressure chamber 13, piston 14, connecting rod 15, oil inlet 16, first inlet and outlet 17, second inlet and outlet 18, oil return port 19, hydraulically controlled two-position three-way valve 20, third inlet and outlet 21, upper end oil inlet and outlet 51, lower end oil inlet and outlet 52, first oil outlet 61, second oil outlet 62, first oil inlet 63, second oil inlet 64, first air inlet and outlet 65, second air inlet and outlet 66. DETAILED DESCRIPTION

[0035] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0036] like Figure 1 As shown, the hydraulically controllable axial compression boosting device 1 mainly includes a booster 11 and a hydraulically controlled two-position three-way valve 20. The booster 11 has a high-pressure chamber 12 and a low-pressure chamber 13 inside, and movable pistons 14 are arranged inside the high-pressure chamber 12 and the low-pressure chamber 13. The two pistons 14 are connected by a connecting rod 15.

[0037] The high-pressure chamber 12 is connected to an oil inlet 16, and one end of the low-pressure chamber 13 is respectively provided with a first inlet and outlet 17 and a second inlet and outlet 18, and the other end is provided with a third inlet and outlet 21. The oil inlet 16 is connected to the P end of the hydraulically controlled two-position three-way valve 20, the first inlet and outlet 17 is connected to an oil return port 19, the second inlet and outlet 18 is connected to the A end of the hydraulically controlled two-position three-way valve 20, and the third inlet and outlet 21 is connected to the B end of the two-position three-way valve.

[0038] It can be seen that the hydraulically controlled two-position three-way valve 20 has two control ports, which are respectively connected to the high-pressure chamber 12 of the supercharger 11 and the oil inlet 16. The hydraulically controlled two-position three-way valve 20 adopts a hydraulically controlled reversing valve, and when the A end and the B end are connected, it is the oil return position, and when the P end and the B end are connected, it is the oil filling position.

[0039] Preferably, the high pressure chamber 12 is connected to the oil inlet 16 via a one-way valve.

[0040] like Figure 1As shown, the chromatography system mainly includes the above-mentioned compression and boosting device 1, a hydraulic cylinder 2, an oil tank 3 (only the inlet and outlet ends thereof are shown), an electromagnetic three-position four-way reversing valve 5, a double-head pneumatic pump 6 and a two-position four-way valve 7.

[0041] The hydraulic cylinder 2 and the oil tank 3 are both on the chromatography column. The hydraulic cylinder 2 has a first oil inlet and outlet 51 at the upper end and a second oil inlet and outlet 52 at the lower end.

[0042] The oil inlet 16 and the oil return port 19 of the compression and boosting device 1 are respectively connected to the T end and the P end of the electromagnetic three-position four-way reversing valve 5. At the same time, the P end of the electromagnetic three-position four-way reversing valve 5 is connected to the first oil inlet and outlet 51 at the upper end of the hydraulic cylinder 2 through a POV hydraulically controlled one-way valve, and the T end of the electromagnetic three-position four-way reversing valve 5 is connected to the second oil inlet and outlet 52 at the lower end of the hydraulic cylinder 2. The high-pressure chamber 12 of the compression and boosting device 1 is also connected to the first oil inlet and outlet 51 at the upper end of the hydraulic cylinder 2 through a one-way valve.

[0043] The double-head pneumatic pump 6 has a first oil outlet 61, a second oil outlet 62, a first oil inlet 63, a second oil inlet 64, a first air inlet and outlet 65, and a second air inlet and outlet 66.

[0044] The first oil outlet 61 and the second oil outlet 62 are connected to the A end of the electromagnetic three-position four-way reversing valve 5, the first oil inlet 63 and the second oil inlet 64 are connected to the outlet end of the oil tank 3, the first air inlet and outlet 65 and the second air inlet and outlet 66 are respectively connected to the A end and the B end of the two-position four-way valve 7, and the B end of the three-position four-way reversing valve 5 is connected to the inlet end of the oil tank 3.

[0045] In addition, the P end of the two-position four-way valve 7 is connected to the air inlet, and the E end is connected to the air outlet.

[0046] Preferably, a safety valve 8 is provided between the A end of the electromagnetic three-position four-way reversing valve 5 and the oil tank 3 .

[0047] The process flow of this chromatography system includes several main steps, which are described below.

[0048] Step 1: Quick oil filling

[0049] like Figure 1 As shown, air enters the first air inlet and outlet 65 of the double-headed pneumatic pump 6 through the two-position four-way valve 7, so that the hydraulic oil enters the first oil inlet 63 of the double-headed pneumatic pump 6 from the outlet end of the oil tank 3. The hydraulic oil will pass from the second oil outlet 62 of the double-headed pneumatic pump 6 through the A end to the P end of the electromagnetic three-position four-way reversing valve 5, and enter the upper end oil inlet and outlet 51 of the hydraulic cylinder 2 and the high-pressure chamber 12 of the axial compression boosting device 1 through the POV hydraulically controlled one-way valve and the oil inlet 16 of the axial compression boosting device 1 respectively.

[0050] At this time, the A end and the B end of the hydraulically controlled two-position three-way valve 20 are connected, which is the oil return position.

[0051] As the hydraulic oil quickly enters, the piston 14 in the hydraulic cylinder 2 moves downward, causing the hydraulic oil therein to flow back to the oil tank 3 through the T end of the electromagnetic three-position four-way reversing valve 5; at the same time, the hydraulic oil in the high-pressure chamber 12 will push the piston 14 to move toward the low-pressure chamber 13, and the hydraulic oil in the low-pressure chamber 13 will flow into the oil tank 3 through the third inlet and outlet 21, the hydraulically controlled two-position three-way valve 20, the second inlet and outlet 18, the first inlet and outlet 17, and the oil return port 19 in sequence until the piston 14 in the booster 11 reaches the bottom of the low-pressure chamber 13. Figure 2 shown.

[0052] At this time, the P end and the B end of the hydraulically controlled two-position three-way valve 20 are connected, which is the oil filling position.

[0053] Step 2: Piston positive pressure

[0054] like Figure 3 As shown, at this time, the hydraulic oil enters the low-pressure chamber 13 of the booster 11 through the P end and the B end connected by the hydraulically controlled two-position three-way valve 20. As the hydraulic oil enters, the piston 14 in the low-pressure chamber 13 is pushed to move toward the high-pressure chamber 12, and the hydraulic oil in the high-pressure chamber 12 enters the upper end inlet and outlet 51 of the hydraulic cylinder 2 until the piston in the booster 11 reaches the top of the high-pressure chamber 12. Figure 4 shown.

[0055] At this time, the A end and the B end of the hydraulically controlled two-position three-way valve 20 are connected, which is the oil return position.

[0056] At the same time, in order to ensure the continuity of oil filling, the P end of the two-position four-way valve 7 is connected to the B end, and the E end is connected to the A end. The hydraulic oil will enter the second oil inlet 64 of the double-head pneumatic pump 6 from the oil tank 3, and enter the A end of the electromagnetic three-position four-way reversing valve 5 from the first oil outlet 61 of the double-head pneumatic pump 6, and the P end of the electromagnetic three-position four-way reversing valve 5 is connected to the high-pressure chamber 12.

[0057] Step 3: Fill the supercharger high pressure chamber with oil

[0058] like Figure 5 As shown, at this time, the hydraulic oil directly enters the high-pressure chamber 12 of the booster 11, and in the high-pressure chamber 12, the hydraulic oil pushes the piston 14 to move toward the low-pressure chamber 13, and the hydraulic oil in the low-pressure chamber 13 will flow into the oil tank 3 through the third inlet and outlet 21, the hydraulically controlled two-position three-way valve 20, the second inlet and outlet 18, the first inlet and outlet 17, and the oil return port 19 in sequence until the piston in the booster 11 reaches the bottom of the low-pressure chamber 13, as shown in FIG. Figure 6 shown.

[0059] At this time, the P end and the B end of the hydraulically controlled two-position three-way valve 20 are connected, which is the oil filling position.

[0060] At the same time, in order to ensure the continuity of oil filling, the P end of the two-position four-way valve 7 is connected to the A end, and the E end is connected to the B end. The hydraulic oil will enter the first oil inlet 63 of the double-head pneumatic pump 6 from the oil tank 3, and enter the A end of the electromagnetic three-position four-way reversing valve 5 from the second oil outlet 62 of the double-head pneumatic pump 6, and the P end of the electromagnetic three-position four-way reversing valve 5 is connected to the P end of the hydraulically controlled two-position three-way valve 20.

[0061] Step 4: Fill the hydraulic cylinder with oil

[0062] Repeat steps 2 and 3 until the oil volume in the hydraulic cylinder 2 reaches the set value.

[0063] Step 5: Remove oil

[0064] like Figure 7 As shown, at this time, the P end and the B end of the two-position three-way valve are connected to the oil filling position, the A end of the electromagnetic three-position four-way reversing valve 5 is connected to the T end, and the B end is connected to the P end. The hydraulic oil enters the lower end oil inlet and outlet 52 of the hydraulic cylinder 2 from the T end through the A end, and then the hydraulic oil pushes the piston in the hydraulic cylinder 2 to move upward. The hydraulic oil in the hydraulic cylinder 2 will flow back to the oil tank 3 through the upper end oil inlet and outlet 51, and the hydraulic oil in the low-pressure chamber 13 of the booster 11 will flow back to the oil tank 3 through the B end and the P end of the hydraulically controlled two-position three-way valve 20.

[0065] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A hydraulically controllable axial compression boosting device, characterized in that: The compression and boosting device (1) comprises a booster (11) and a hydraulically controlled two-position three-way valve (20); the booster (11) has a high-pressure chamber (12) and a low-pressure chamber (13) inside; the high-pressure chamber (12) is connected to an oil inlet (16); one end of the low-pressure chamber (13) is provided with a first inlet and outlet (17) and a second inlet and outlet (18), and the other end is provided with a third inlet and outlet (21); The oil inlet (16) is connected to the P end of the hydraulically controlled two-position three-way valve (20), the first inlet and outlet (17) is connected to an oil return port (19), the second inlet and outlet (18) is connected to the A end of the hydraulically controlled two-position three-way valve (20), and the third inlet and outlet (21) is connected to the B end of the hydraulically controlled two-position three-way valve (20).

2. A hydraulically controllable axial compression boosting device according to claim 1, characterized in that: A movable piston (14) is disposed inside the high-pressure chamber (12) and the low-pressure chamber (13).

3. A hydraulically controllable axial compression boosting device according to claim 2, characterized in that: The two pistons (14) are connected via a connecting rod (15).

4. A hydraulically controllable axial compression boosting device according to claim 1, characterized in that: The high-pressure chamber (12) is connected to the oil inlet (16) via a one-way valve.

5. The hydraulically controllable axial compression boosting device according to claim 1, characterized in that: When the A end and the B end of the hydraulically controlled two-position three-way valve (20) are connected, it is the oil return position, and when the P end and the B end are connected, it is the oil filling position.

6. A hydraulically controllable axial compression boosting device according to claim 5, characterized in that: The hydraulically controlled two-position three-way valve (20) is a hydraulically controlled reversing valve.

7. A chromatography system using the hydraulically controllable axial compression boosting device according to any one of claims 1 to 6, characterized in that: It comprises a compression and boosting device (1), a hydraulic oil cylinder (2), an oil tank (3), an electromagnetic three-position four-way reversing valve (5), a double-head pneumatic pump (6) and a two-position four-way valve (7), wherein the hydraulic oil cylinder (2) and the oil tank (3) are both on the chromatography column; The oil inlet (16) and the oil return port (19) of the compression and boosting device (1) are respectively connected to the T end and the P end of the electromagnetic three-position four-way reversing valve (5); the P end of the electromagnetic three-position four-way reversing valve (5) is connected to the upper end of the hydraulic cylinder (2) via a POV hydraulically controlled one-way valve, and the T end is connected to the lower end of the hydraulic cylinder (2); the high-pressure chamber (12) of the compression and boosting device (1) is connected to the upper end of the hydraulic cylinder (2) via a one-way valve; The double-head pneumatic pump (6) is respectively connected to the A end of the electromagnetic three-position four-way reversing valve (5), the outlet end of the oil tank (3), and the A end and the B end of the two-position four-way valve (7); the B end of the electromagnetic three-position four-way reversing valve (5) is connected to the inlet end of the oil tank (3); The P end of the two-position four-way valve (7) is connected to the air inlet, and the E end is connected to the air outlet.

8. A chromatography system using a hydraulically controllable axial compression booster according to claim 7, characterized in that: The hydraulic cylinder (2) has an upper oil inlet and outlet (51) at its upper end and a lower oil inlet and outlet (52) at its lower end, wherein the P end of the electromagnetic three-position four-way reversing valve (5) and the high-pressure chamber (12) are both connected to the upper oil inlet and outlet (51), and the T end of the electromagnetic three-position four-way reversing valve (5) is connected to the lower oil inlet and outlet (52).

9. A chromatography system using a hydraulically controllable axial compression booster according to claim 7, characterized in that: The double-head pneumatic pump (6) comprises a first oil outlet (61), a second oil outlet (62), a first oil inlet (63), a second oil inlet (64), a first air inlet and outlet (65) and a second air inlet and outlet (66), wherein the first oil outlet (61) and the second oil outlet (62) are connected to the A end of the electromagnetic three-position four-way reversing valve (5), the first oil inlet (63) and the second oil inlet (64) are connected to the outlet end of the oil tank (3), and the first air inlet and outlet (65) and the second air inlet and outlet (66) are respectively connected to the A end and the B end of the two-position four-way valve (7).

10. The chromatography system using a hydraulically controllable axial compression booster according to claim 7, characterized in that: A safety valve (8) is provided between the A end of the electromagnetic three-position four-way reversing valve (5) and the oil tank (3).

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