Inverted stage difference type circulating liquid seal air cylinder

Abstract

The utility model relates to the technical field of circulating liquid seal compressors, in particular to an inverted stage difference type circulating liquid seal air cylinder. Comprising a cylinder body, a cylinder gland is arranged at one end of the cylinder body, a cylinder base is arranged at the other end of the cylinder body, a piston structure is arranged in the cylinder body and comprises a piston and a piston rod, and a high-pressure cavity is formed between the cylinder body between the end face of one end of the piston and the cylinder gland and the outer surface of the piston rod. The side wall of the cylinder body is provided with a high-pressure air inlet and a high-pressure air outlet which are communicated with the high-pressure cavity, a low-pressure cavity is formed in the cylinder body between the other end face of the piston and the air cylinder base, and the side wall of the cylinder body is provided with a low-pressure air inlet and a low-pressure air outlet which are communicated with the low-pressure cavity. When the piston reciprocates, first-stage pressurization is conducted on gas through the low-pressure cavity, the pressurized gas enters the high-pressure cavity through the pipeline to be subjected to second-stage pressurization, finally the pressurized gas is exhausted outwards, the low-pressure cavity and the high-pressure cavity are matched with each other to conduct stage difference type pressurization on compressed gas, and the compression efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circulating liquid seal compressor technical field especially relates to a kind of inverted differential circulating liquid seal cylinder. BACKGROUND

[0002] Circulating liquid seal compressor mainly through driving mechanism to drive the piston reciprocating motion in cylinder body to realize the pressurization of gas. Such as the patent application with the publication number CN114439728A, discloses a kind of circulating liquid seal compressor, it is stored through being arranged annular cavity between piston and cylinder body, to store circulating liquid, realizes lubrication, cooling and sealing by circulating liquid. The pressurization form of this cylinder is single-acting cylinder, one gas inlet and one exhaust port are provided on cylinder body, gas enters cylinder from gas inlet, high-pressure gas is discharged from exhaust port after pressurization in cylinder, this single-acting cylinder cannot carry out differential pressurization to compressed gas, and the compression efficiency is low, and there is no good method to solve the above problems at present.

[0003] In summary, the differential pressurization problem of compressed gas in circulating liquid seal compressor has become a technical problem urgently needed to be solved in the industry. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of inverted differential circulating liquid seal cylinder to make up for the deficiency of prior art, solve the problem of the compression efficiency of previous single-acting cylinder low.

[0005] The utility model provides the technical scheme to solve the above technical problem:

[0006] A kind of inverted differential circulating liquid seal cylinder, including cylinder body, one end of cylinder body is equipped with cylinder gland, the other end of cylinder body is equipped with cylinder base, piston structure is equipped in cylinder body, the piston structure includes piston and piston rod, piston is movably installed in cylinder body, piston rod is movably installed in cylinder gland, the outside surface of piston is equipped with circulating cavity, circulating cavity is used to store circulating liquid to cool, lubricate and liquid seal cylinder body, cylinder side wall is equipped with liquid inlet and liquid outlet in communication with circulating cavity;

[0007] The cylinder between the end face of one end of piston and cylinder gland and the outer surface between piston rod is formed high-pressure cavity, cylinder side wall is equipped with high-pressure inlet and high-pressure outlet in communication with high-pressure cavity, low-pressure cavity is formed in the cylinder between the end face of another end of piston and cylinder base, cylinder side wall is equipped with low-pressure inlet and low-pressure outlet in communication with low-pressure cavity.

[0008] The cylinder and cylinder base, cylinder gland are respectively connected by bolt and sealed by sealing ring.

[0009] Low-pressure inlet is equipped with low-pressure inlet valve, and low-pressure outlet is equipped with low-pressure exhaust valve.

[0010] The high-pressure inlet is provided with a high-pressure inlet valve, and the high-pressure outlet is provided with a high-pressure outlet valve.

[0011] The volume of the high-pressure cavity is smaller than that of the low-pressure cavity.

[0012] The low-pressure outlet is connected with the high-pressure inlet through a pipeline.

[0013] The utility model discloses the above -mentioned scheme has the following advantages:

[0014] Form the low-pressure cavity in the cylinder body between the piston and the cylinder gland, form the high-pressure cavity in the cylinder body between the piston and the cylinder base, when the piston reciprocates, first pass through the low-pressure cavity and carry out the first stage pressurization to the gas, and the gas after pressurization enters the high-pressure cavity and carries out the second stage pressurization through the pipeline, and finally, discharge outward, and the low-pressure cavity and the high-pressure cavity cooperate with each other and can carry out the differential pressure pressurization to the compressed gas, which greatly improves the compression efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the sectional view structural schematic diagram of the utility model.

[0016] In the drawing, 1, cylinder body, 2, cylinder gland, 3, cylinder base, 4, piston, 5, piston rod, 6, circulating cavity, 7, liquid inlet, 8, liquid outlet, 9, high-pressure cavity, 10, high-pressure inlet, 11, high-pressure outlet, 12, low-pressure cavity, 13, low-pressure inlet, 14, low-pressure outlet, 15, low-pressure inlet valve, 16, low-pressure outlet valve, 17, high-pressure inlet valve, 18, high-pressure outlet valve. DETAILED DESCRIPTION

[0017] In order to clearly illustrate the technical features of the present application, the following will be described in detail through specific embodiments, and combined with the drawings of the present application.

[0018] As shown in the drawing, Figure 1 A reverse differential pressure circulating liquid seal cylinder, comprising a cylinder body 1, one end of the cylinder body 1 is provided with a cylinder gland 2, the other end of the cylinder body 1 is provided with a cylinder base 3, the cylinder body 1 is provided with a piston structure, the piston structure comprises a piston 4 and a piston rod 5, the piston 4 is movably installed in the cylinder body 1, the piston rod 5 is movably installed in the cylinder gland 2, the outer surface of the piston 4 is provided with a circulating cavity 6, the circulating cavity 6 is used for storing circulating liquid to cool, lubricate and liquid seal the cylinder body 1, the two sides of the circulating cavity 6 are respectively provided with sealing rings for sealing, the side wall of the cylinder body 1 is provided with a liquid inlet 7 and a liquid outlet 8 which are connected with the circulating cavity 6;

[0019] The high pressure cavity 9 is formed between the end face of the piston 4 and the cylinder cover 2, and between the outer surface of the cylinder body 1 and the piston rod 5. The cylinder body 1 is provided with a high pressure inlet 10 and a high pressure outlet 11 which are connected with the high pressure cavity 9. The low pressure cavity 12 is formed between the other end face of the piston 4 and the cylinder base 3. The cylinder body 1 is provided with a low pressure inlet 13 and a low pressure outlet 14 which are connected with the low pressure cavity 12.

[0020] The cylinder body 1 is connected with the cylinder base 3 and the cylinder cover 2 by bolts, and is sealed by sealing rings.

[0021] The low pressure inlet 13 is provided with a low pressure inlet valve 15, and the low pressure outlet 14 is provided with a low pressure outlet valve 16.

[0022] The high pressure inlet 10 is provided with a high pressure inlet valve 17, and the high pressure outlet 11 is provided with a high pressure outlet valve 18.

[0023] The piston rod 5 is arranged between the piston 4 and the cylinder cover 2, and there is no piston rod 5 between the piston 4 and the cylinder base 3. Therefore, the volume of the high pressure cavity 9 is smaller than that of the low pressure cavity 12. The smaller the volume is, the greater the pressure of the gas is, and vice versa.

[0024] The low pressure outlet 14 is connected with the high pressure inlet 10 by a pipeline, so that the gas in the low pressure cavity 12 after being pressurized can enter the high pressure cavity 9 for secondary pressurization.

[0025] The circulating liquid in the circulating cavity 6 includes lubricating oil, water or ionic liquid. Preferably, the application adopts ionic liquid, because ionic liquid has the advantages of no pollution, easy separation from the product, easy recovery and repeated use, and even if it leaks, it will not pollute the gas.

[0026] Working principle:

[0027] When working, the piston rod 5 drives the piston 4 to reciprocate in the cylinder body 1. When the piston 4 moves upward, the low pressure cavity 12 is in a compression state, and the high pressure cavity 9 is in an intake state. Specifically, the piston 4 pressurizes the gas in the low pressure cavity 12, and the gas in the low pressure cavity 12 enters the high pressure cavity 9 through the low pressure outlet 14, the pipeline and the high pressure inlet 10. When the piston 4 moves downward, the high pressure cavity 9 is in a compression state, and the low pressure cavity 12 is in an intake state. Specifically, the piston 4 pressurizes the gas in the high pressure cavity 9, and the pressurized gas is discharged outward through the high pressure outlet 11. The gas enters the low pressure cavity 12 from the low pressure inlet 13. Such repeated implementation realizes the function of the reverse differential circulating liquid sealed compression cylinder. The low pressure cavity 12 and the high pressure cavity 9 cooperate to pressurize the compressed gas in a differential manner, which greatly improves the compression efficiency.

[0028] The specific embodiments above cannot be used as a limitation to the protection scope of the utility model, and any alternative improvement or transformation made by the skilled in the art to the utility model embodiments falls within the protection scope of the utility model.

[0029] The utility model is not detailed, and is the known technology of the skilled in the art.

Claims

1. A reverse differential cycle liquid-sealed cylinder, characterized by: The cylinder includes a cylinder body, one end of the cylinder body is provided with a cylinder cover, the other end of the cylinder body is provided with a cylinder base, a piston structure is arranged in the cylinder body, the piston structure includes a piston and a piston rod, the piston is movably arranged in the cylinder body, the piston rod is movably arranged in the cylinder cover, an outer surface of the piston is provided with a circulation cavity, the circulation cavity is used for storing circulating liquid to cool, lubricate and liquid seal the cylinder body, a side wall of the cylinder body is provided with a liquid inlet and a liquid outlet which are communicated with the circulation cavity; A high-pressure cavity is formed between the cylinder body and an outer surface of the piston rod between the end face of one end of the piston and the cylinder cover, a high-pressure inlet and a high-pressure outlet which are communicated with the high-pressure cavity are arranged on the side wall of the cylinder body, a low-pressure cavity is formed in the cylinder body between the end face of the other end of the piston and the cylinder base, a low-pressure inlet and a low-pressure outlet which are communicated with the low-pressure cavity are arranged on the side wall of the cylinder body.

2. A reverse differential cycle liquid-sealed cylinder according to claim 1, characterized in that: The cylinder body, the cylinder base and the cylinder cover are connected by bolts and sealed by sealing rings.

3. A reverse differential cycle liquid-sealed cylinder according to claim 1, wherein: A low-pressure inlet valve is arranged at the low-pressure inlet, and a low-pressure exhaust valve is arranged at the low-pressure outlet.

4. A reverse differential cycle liquid sealed cylinder according to claim 1, wherein: A high-pressure inlet valve is arranged at the high-pressure inlet, and a high-pressure exhaust valve is arranged at the high-pressure outlet.

5. A reverse differential cycle liquid sealed cylinder as defined in claim 1, wherein: The volume of the high-pressure cavity is smaller than that of the low-pressure cavity.

6. A reverse differential cycle liquid sealed cylinder as defined in claim 1, wherein: The low-pressure outlet is connected with the high-pressure inlet through a pipeline.

Images