CN204783521U - Liquid drive supercharging device - Google Patents

Abstract

The utility model provides a liquid-driven supercharging device which adopts liquid as a driving medium to continuously and reliably pressurize a sealing gas, comprising a liquid driving unit, a gas supercharging unit and a reversing control unit, the liquid driving unit and the gas supercharging unit The units are connected via a commutation control unit. The device solves the existing problems of using a gas booster pump to pressurize the sealing gas in the existing dry gas seal, and has the characteristics of long working life, safe operation, easy control of output pressure, high control precision, and simple operation and control.

Description

Liquid Drive Booster

technical field

The utility model relates to the technical field of supercharging devices, in particular to a liquid-driven supercharging device for dry gas sealing.

Background technique

The dry gas seal of the compressor requires reliable sealing gas injection during the whole process of starting and stopping. Since the injection of the sealing gas needs to maintain a high pressure, a gas booster pump is usually used to boost the low-pressure gas source. The gas booster pump can be used to increase the low-pressure gas source to the required high-pressure gas. When the gas booster pump is used, the gas drive part of the pump needs to use lubricating gas to lubricate the seal and other internal parts; at the same time, the gas of the pump The driving part is prone to wear and tear of the seal and internal parts, which affects the service life of the pump; and the outlet driving gas is often directly discharged into the air during the working process of the gas booster pump, resulting in a waste of resources.

Utility model content

The purpose of the utility model is to solve the existing technical problems of using a gas booster pump to pressurize the sealing gas in the existing dry gas seal, and to provide a liquid-driven booster that uses liquid as the driving medium to continuously and reliably pressurize the sealing gas. pressure device.

In order to solve the above technical problems, the utility model adopts a liquid-driven supercharging device, which includes a liquid driving unit, a gas supercharging unit and a reversing control unit, and the liquid driving unit and the gas supercharging unit are connected through a reversing control unit ; The liquid drive unit includes a voltage stabilizing circuit composed of an energy storage branch, a liquid return branch and a ball valve B, and a drive circuit composed of an energy storage branch, a liquid return branch, a ball valve A and a reversing control unit; The energy storage branch includes a liquid storage tank, a hydraulic pump, and an accumulator, and the liquid storage tank, hydraulic pump, and accumulator are connected through pipelines in sequence; the liquid return branch includes an overflow valve, and the liquid Return to the liquid storage tank through the overflow valve; the ball valve A and the ball valve B are arranged in parallel, and are respectively used to control the cut-off and conduction of the drive circuit and the voltage stabilization circuit; the gas booster unit includes a booster cylinder, and the booster The compressed air cylinder includes a large-diameter cylinder and a small-diameter cylinder. A large-diameter piston is arranged in the large-diameter cylinder, and a small-diameter piston is arranged in the small-diameter cylinder. The large-diameter piston is connected to the small-diameter piston. The small-diameter cylinder of the booster cylinder is provided with There are low-pressure air inlet and high-pressure air outlet; the booster cylinder is connected with a reversing control unit.

As a further improvement of the utility model, the low-pressure gas inlet and the high-pressure gas outlet of the pressurized cylinder are respectively provided with an inlet check valve and an outlet check valve.

Further, the reversing control unit adopts a two-position five-way reversing valve.

Further, a pressure gauge is set on the energy storage branch.

The beneficial effect that the utility model has:

1) The device uses liquid as the driving medium, which can play a certain lubricating effect, thereby reducing the wear of the seals and internal parts of the driving part in the supercharging equipment, and increasing its own working life.

2) Liquid is used as the driving medium, no electrical components, no arc and sparks, safe operation, suitable for use in dangerous situations.

3) The output pressure is easy to control with high control precision; the precise control of the gas output pressure can be realized by adjusting the pressure of the driving medium.

4) The operation and control are simple, and manual control or automatic control can be selected according to needs.

5) The device has good versatility, and different pressure ranges can be obtained by selecting different types of booster cylinders.

6) The recycling of the driving medium can be realized, which saves the use cost.

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the utility model.

In the figure: 1. Fluid storage tank, 2. Filter, 3. Hydraulic pump, 4. One-way valve, 5. One-way valve, 7. Accumulator, 8. Ball valve B, 9. Ball valve A, 10. Replacement Directional control unit, 11. Relief valve, 12. Pressure gauge, 13. Large diameter piston, 14. Small diameter piston, 15. Inlet check valve, 16 Outlet check valve, 17. Booster cylinder, small diameter cylinder, 18. Booster cylinder Large diameter cylinder of compressed air cylinder, 19, temperature measuring device, 20, liquid level gauge.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1, it is a liquid-driven supercharging device, including a liquid driving unit, a gas supercharging unit and a reversing control unit 10, and the liquid driving unit and the gas supercharging unit are connected through the reversing control unit 10; The liquid drive unit includes a pressure stabilizing circuit composed of an energy storage branch, a liquid return branch and a ball valve B8, and a drive circuit composed of an energy storage branch, a liquid return branch, a ball valve A9 and a reversing control unit 10; The energy storage branch includes a liquid storage tank 1, a hydraulic pump 3 and an accumulator 7, and the liquid storage tank 1, the hydraulic pump 3 and the accumulator 7 are connected through pipelines in sequence; the liquid return branch includes an overflow Valve 11, the liquid returns to the liquid storage tank 1 through the overflow valve 11; the ball valve A9 and the ball valve B8 are arranged in parallel, and are respectively used to control the cut-off and conduction of the drive circuit and the voltage stabilization circuit; the gas pressurization unit Comprising a booster cylinder, the booster cylinder includes a large-diameter cylinder 18 and a small-diameter cylinder 17, a large-diameter piston 13 is provided in the large-diameter cylinder 18, a small-diameter piston 14 is provided in the small-diameter cylinder 17, and the large-diameter cylinder 17 is provided with a small-diameter piston 14. Piston 13 is connected to small-diameter piston 14 , and small-diameter cylinder 17 of the booster cylinder is provided with a low-pressure gas inlet and a high-pressure gas outlet; the booster cylinder is connected to the reversing control unit 10 .

The low-pressure gas inlet and the high-pressure gas outlet of the pressurized cylinder are respectively provided with an inlet check valve 15 and an outlet check valve 16 .

The reversing control unit 10 adopts a two-position five-way reversing valve.

A pressure gauge 12 is arranged on the energy storage branch.

In the utility model, a filter 2 is arranged at the front end of the hydraulic pump 3, the hydraulic pump 3 is connected to a one-way valve 5, the one-way valve 5 is connected to another filter, and the filter is connected to a hydraulic control one-way valve 4. The hydraulic control check valve 4 is respectively connected to the accumulator 7, the ball valve A9 and the ball valve B8, the ball valve B8 is connected to the overflow valve 11, and the overflow valve 11 is connected to the liquid storage tank 1; the ball valve A9 is connected to the reversing control unit 10 , the reversing control unit 10 is connected to the large-diameter cylinder 18 of the pressurized cylinder, and the reversing control unit 10 is connected to the overflow valve 11 .

The utility model realizes the working principle of liquid-driven pressurization as follows:

Close the ball valve A9, open the ball valve B8; start the hydraulic pump 3, the hydraulic pump 3 will transfer the liquid in the liquid storage tank 1 to the hydraulic pipeline, and transfer the liquid to the accumulator 7 through the check valve 4 and the hydraulic control check valve 5 After the liquid is stabilized in the accumulator 7, it returns to the liquid storage tank 1 through the ball valve B8 through the overflow valve 11.

Open the ball valve A9 and close the ball valve B8; the high-pressure liquid enters the large-diameter cylinder 18 of the pressurized cylinder through the ball valve A9 and the two-position five-way reversing valve 10, and the high-pressure liquid exerts pressure on the large-diameter piston 13, pushing the large-diameter piston 13 to move to the right , the small-diameter piston 14 connected to the large-diameter piston 13 moves to the right under the action of the large-diameter piston 13, and compresses the low-pressure gas that enters the small-diameter cylinder 17 of the booster cylinder from the low-pressure gas inlet, and then converts the low-pressure gas into high-pressure gas. The high-pressure gas generated at this time is discharged through the outlet check valve 16 arranged on the small-diameter cylinder, so as to realize the delivery of high-pressure sealing gas for dry gas sealing. Through the reversing control of the two-position five-way reversing valve 10 and the position of the large-diameter piston 13, the liquid in the drive circuit is cut off and connected to control the position of the two-position five-way reversing valve 10, and the movement direction of the piston is determined to realize increasing The reciprocating movement of the piston in the compression cylinder realizes the continuous operation of the supercharging device. The liquid discharged through the two-position five-way reversing valve 10 finally returns to the liquid storage tank 1 through the overflow valve 11 .

In the utility model, the monitoring and control of the liquid pressure can be realized through the adjustment of the overflow valve 11 and the pressure gauge 12 arranged on the energy storage branch road. The liquid storage tank 1 is also provided with a liquid temperature measuring device 19 and a liquid level gauge 20 to ensure the normal operation of the device.

Claims (4)

1. liquid driven supercharging device, is characterized in that: comprise liquid driven unit, gas boosting unit and commutation control unit, and described liquid driven unit is connected by commutation control unit with gas compress cell;

Described liquid driven unit comprises the loop of voltage regulation be made up of energy storage branch road, liquid backflow branch road and ball valve B, and the drive circuit be made up of energy storage branch road, liquid backflow branch road, ball valve A and commutation control unit;

Described energy storage branch road comprises liquid tank, oil hydraulic pump and accumulator, and described liquid tank, oil hydraulic pump are connected by pipeline successively with accumulator;

Described liquid backflow branch road comprises relief valve, and described liquid gets back to liquid tank through relief valve;

Described ball valve A and ball valve B is arranged in parallel, and is respectively used to the cut-off and the conducting that control drive circuit and loop of voltage regulation;

Described gas boosting unit comprises pressurized cylinder, described pressurized cylinder comprises large footpath cylinder and path cylinder, large footpath piston is provided with in the cylinder of described large footpath, path piston is provided with in described path cylinder, described large footpath piston connects path piston, and the path cylinder of described pressurized cylinder is provided with low pressure gas entrance and high pressure air outlet;

Described pressurized cylinder connects commutation control unit.

2. liquid driven supercharging device according to claim 1, is characterized in that: the low pressure gas entrance of described pressurized cylinder and high pressure air outlet are respectively arranged with inlet one-way valve and Outlet check valves.

3. liquid driven supercharging device according to claim 2, is characterized in that: described commutation control unit adopts switch valve with two-position and five-pass.

4. liquid driven supercharging device according to any one of claim 1 to 3, is characterized in that: described energy storage branch road is provided with pressure gauge.