A method for detecting leakage of a circulating liquid seal compressor plunger cylinder

Abstract

A kind of cyclic liquid seal compressor plunger cylinder leakage detection method, including plunger cylinder, plunger is equipped in the plunger cylinder, plunger reciprocates in plunger cylinder, first annular groove cavity is equipped in plunger cylinder and plunger between lower portion, sealing medium is equipped in first annular groove cavity, sealing medium inlet and sealing medium outlet are equipped on the side wall of plunger cylinder corresponding the position of first annular groove cavity;The upper side and the lower side of the first annular groove cavity are respectively equipped with first sealing ring and second sealing ring, gas and sealing medium leakage detection port are equipped close to the upper side of first sealing ring, sealing medium leakage detection port is equipped close to the lower side of second sealing ring, third sealing ring for sealing gas is equipped between plunger cylinder and plunger top portion.It is timely to send signal to PLC control system by pressure sensor, remind staff to replace damaged sealing ring in time, maintenance is convenient, improve the overall sealing effect in plunger cylinder.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of leakage detection methods of circulating liquid seal compressor plunger cylinder. BACKGROUND

[0002] Circulating liquid seal compressor mainly drives plunger reciprocating motion in plunger cylinder through connecting rod mechanism to realize the pressurization of gas.

[0003] The plunger cylinder now mainly has the following shortcomings when working:

[0004] First, the sealing effect of gas is poor, and compressed gas is easy to leak outward from the gap between plunger cylinder and plunger;

[0005] Second, the sealing effect of lubricating medium is poor, and the sealing ring is easy to break after a long time, causing sealing failure, leading to leakage of lubricating medium and contamination of compressed gas;

[0006] Third, there is no detection means for gas and lubricating medium leakage, so it is impossible to find gas leakage or lubricating medium leakage in time, so that the corresponding damaged sealing ring cannot be replaced;

[0007] Fourth, most of the sealing rings are installed by grooving on the surface of the plunger, which reduces the overall strength of the plunger and affects its service life.

[0008] In summary, the above problems of circulating liquid seal compressor plunger cylinder have become a technical problem that needs to be solved in the industry. SUMMARY

[0009] The present application provides a kind of leakage detection methods of circulating liquid seal compressor plunger cylinder to make up for the deficiencies of prior art, solve the problem that gas and lubricating medium in plunger cylinder cannot be detected in time after leakage.

[0010] The technical solution adopted by the present application to solve the above technical problems is:

[0011] A kind of leakage detection method of circulating liquid seal compressor plunger cylinder, comprising plunger cylinder, the plunger cylinder is provided with plunger, plunger reciprocating motion in plunger cylinder, first annular groove cavity is arranged between the lower part of plunger cylinder and plunger, sealing medium is arranged in first annular groove cavity, sealing medium inlet and sealing medium outlet are arranged on the side wall of plunger cylinder corresponding to the position of first annular groove cavity;

[0012] The upper side and the lower side of the first annular groove cavity are respectively provided with a first sealing ring and a second sealing ring, the upper side close to the first sealing ring is provided with a gas and sealing medium leakage detection port, a pressure sensor is arranged in the gas and sealing medium leakage detection port, the pressure sensor is connected with the PLC control system, the lower side close to the second sealing ring is provided with a sealing medium leakage detection port, a pressure sensor is arranged in the sealing medium leakage detection port, and the pressure sensor is connected with the PLC control system;

[0013] The third sealing ring for sealing the gas is arranged at the top between the plunger cylinder and the plunger;

[0014] When the PLC control system detects that the pressure sensor signal in the gas and sealing medium leakage detection port exceeds the set range value, an alarm signal is sent to the staff, the staff judges the fault as the third sealing ring leaking gas or the first sealing ring leaking sealing medium, if there is liquid leakage, the fault is the first sealing ring, and if there is no liquid leakage, the fault is the third sealing ring;

[0015] When the PLC control system detects that the pressure sensor signal in the sealing medium leakage detection port exceeds the set range value, an alarm signal is sent to the staff, and the staff judges the fault as the second sealing ring.

[0016] The gas and sealing medium leakage detection port corresponds to a second annular groove cavity arranged in the inner wall of the plunger cylinder.

[0017] The sealing medium leakage detection port corresponds to a third annular groove cavity arranged in the inner wall of the plunger cylinder.

[0018] The first annular groove cavity is arranged in the inner wall of the plunger steel body, and the sealing medium circulates in the first annular groove cavity to seal, cool and lubricate the plunger.

[0019] The sealing medium comprises a liquid medium, and the liquid medium comprises a magnetic liquid or an ionic liquid.

[0020] The outer surface of the plunger is provided with a plurality of guide rings.

[0021] The lower side of the sealing medium leakage detection port is provided with a fourth sealing ring, and the fourth sealing ring is used for preventing the sealing medium from overflowing out of the plunger cylinder when the second sealing ring fails.

[0022] The first sealing ring, the second sealing ring and the fourth sealing ring are all mounted on the inner wall of the plunger steel body.

[0023] The above scheme is adopted, and the following advantages are achieved:

[0024] By setting gas and sealing medium leakage detection ports on the upper side near the first sealing ring and sealing medium leakage detection ports on the lower side near the second sealing ring, the gas and sealing medium leakage detection ports can promptly detect whether the third sealing ring is leaking gas, and whether the first sealing ring is leaking sealing medium. The sealing medium leakage detection port can promptly detect whether the second sealing ring is leaking sealing medium. A pressure sensor promptly sends a signal to the PLC control system, reminding personnel to replace damaged sealing rings in a timely manner. This facilitates maintenance and effectively prevents compressed gas from leaking outwards from the gap between the plunger cylinder and the plunger, and also effectively prevents compressed gas contamination caused by lubricating medium leakage, thus improving the overall sealing effect within the plunger cylinder. Furthermore, most of the sealing rings and the annular groove are located on the inner wall of the plunger cylinder, avoiding extensive slotting on the plunger surface, increasing the plunger's strength, and ensuring its service life. Attached image description:

[0025] Figure 1 This is a schematic diagram of the structure of the present invention.

[0026] In the figure, 1 is the plunger cylinder, 2 is the plunger, 3 is the first annular groove, 4 is the sealing medium inlet, 5 is the sealing medium outlet, 6 is the first sealing ring, 7 is the second sealing ring, 8 is the gas and sealing medium leakage detection port, 9 is the sealing medium leakage detection port, 10 is the third sealing ring, 11 is the second annular groove, 12 is the third annular groove, 13 is the guide ring, and 14 is the fourth sealing ring. Detailed implementation method:

[0027] To clearly illustrate the technical features of this solution, the invention will be described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0028] like Figure 1 As shown, a method for detecting leakage in the piston cylinder of a circulating liquid seal compressor includes a piston cylinder 1, a piston 2 disposed inside the piston cylinder 1, the piston 2 reciprocating within the piston cylinder 1, a first annular groove 3 disposed at the lower part between the piston cylinder 1 and the piston 2, a sealing medium disposed within the first annular groove 3, and a sealing medium inlet 4 and a sealing medium outlet 5 disposed on the side wall of the piston cylinder 1 corresponding to the position of the first annular groove 3.

[0029] The first annular cavity 3 is provided with a first sealing ring 6 and a second sealing ring 7 on its upper and lower sides, respectively. A gas and sealing medium leakage detection port 8 is provided on the upper side near the first sealing ring 6. A pressure sensor is provided in the gas and sealing medium leakage detection port 8 and is connected to the PLC control system. A sealing medium leakage detection port 9 is provided on the lower side near the second sealing ring 7. A pressure sensor is provided in the sealing medium leakage detection port 9 and is connected to the PLC control system.

[0030] The third sealing ring 10 for sealing gas is arranged between the plunger cylinder 1 and the plunger 2 at the top;

[0031] When the PLC control system detects that the pressure sensor signal in the gas and sealing medium leakage detection port 8 exceeds the set range value, an alarm signal is sent to the staff, the staff judges the fault as the third sealing ring 10 leaking gas or the first sealing ring 6 leaking sealing medium, if there is liquid leakage, the fault is the first sealing ring 6, if there is no liquid leakage, the fault is the third sealing ring 10, and the corresponding sealing ring is replaced in time;

[0032] When the PLC control system detects that the pressure sensor signal in the sealing medium leakage detection port 9 exceeds the set range value, an alarm signal is sent to the staff, the staff judges the fault as the second sealing ring 7 leaking sealing medium and replaces it in time.

[0033] The second annular groove 11 is arranged on the inner wall of the plunger cylinder 1 corresponding to the gas and sealing medium leakage detection port 8.

[0034] The third annular groove 12 is arranged on the inner wall of the plunger cylinder 1 corresponding to the sealing medium leakage detection port 9.

[0035] The first annular groove 3 is arranged on the inner wall of the plunger steel body 1, and the sealing medium circulates in the first annular groove 3 to seal, cool and lubricate the plunger 2.

[0036] The sealing medium includes a liquid medium, and the liquid medium includes a magnetic liquid or an ionic liquid. The magnetic liquid is a stable colloidal liquid mixed by magnetic solid particles with a diameter of nanometer level, a base liquid and a surfactant, and has the advantages of zero leakage, long service life, high reliability, high speed resistance and small viscous friction during sealing.

[0037] The outer surface of the plunger 2 is provided with a plurality of guide rings 13, which play a guiding and supporting role, can reduce the wear of each sealing ring, and prolong the service life of each sealing ring.

[0038] The lower side of the sealing medium leakage detection port 9 is provided with a fourth sealing ring 14, which can prevent the sealing medium from overflowing out of the plunger cylinder 1 when the second sealing ring 7 fails.

[0039] The first sealing ring 6, the second sealing ring 7 and the fourth sealing ring 14 are all installed on the inner wall of the plunger steel body 1, which avoids a large number of grooves on the surface of the plunger 2 and increases the strength of the plunger 2.

[0040] Working principle:

[0041] When the compressor is working, the plunger 2 reciprocates in the plunger cylinder 1 to suck and compress the gas medium. The third sealing ring 10 seals the gas medium. If the third sealing ring 10 fails, the gas medium will leak downward through the gap between the plunger cylinder 1 and the plunger 2. When the gas medium reaches the second annular groove 11, the pressure sensor in the gas and sealing medium detection port 8 can quickly detect the signal and send it to the PLC control system. The PLC control system sends an alarm signal to remind the staff to repair in time.

[0042] The plunger cylinder 1 is provided with a sealing medium inlet 4 and a sealing medium outlet 5. The sealing medium circulates in the first annular groove 3 through the sealing medium inlet 4 and the sealing medium outlet 5 to seal, cool and lubricate the plunger 2.

[0043] The sealing medium is sealed by the first sealing ring 6 and the second sealing ring 7. If the first sealing ring 6 fails, the sealing medium will leak upward through the gap between the plunger cylinder 1 and the plunger 2 to the second annular groove 11. The pressure sensor in the gas and sealing medium detection port 8 can quickly detect the signal and send it to the PLC control system. The PLC control system sends an alarm signal to remind the staff to repair in time.

[0044] If the second sealing ring 7 fails, the sealing medium will leak downward through the gap between the plunger cylinder 1 and the plunger 2 to the third annular groove 12. The pressure sensor in the sealing medium detection port 9 can quickly detect the signal and send it to the PLC control system. The PLC control system sends an alarm signal to remind the staff to repair in time.

[0045] The fourth sealing ring 14 can prevent the sealing medium from overflowing out of the plunger cylinder 1 when the second sealing ring 7 fails.

[0046] The above specific embodiments cannot be regarded as a limitation on the protection scope of the present application. Any alternative improvement or change made by those skilled in the art to the embodiments of the present application falls within the protection scope of the present application.

[0047] The details not described in the present application are well known to those skilled in the art.

Claims

1. A method of detecting leakage in a circulating liquid seal compressor plunger cylinder, comprising a plunger cylinder having a plunger disposed therein, the plunger reciprocating within the plunger cylinder, the method comprising: The lower part between the plunger cylinder and the plunger is provided with a first annular groove cavity, and a sealing medium is arranged in the first annular groove cavity. ​ The upper side and the lower side of the first annular groove cavity are respectively provided with a first sealing ring and a second sealing ring, the upper side close to the first sealing ring is provided with a gas and sealing medium leakage detection port, and a pressure sensor is arranged in the gas and sealing medium leakage detection port, the pressure sensor is connected with a PLC control system, the lower side close to the second sealing ring is provided with a sealing medium leakage detection port, and a pressure sensor is arranged in the sealing medium leakage detection port, the pressure sensor is connected with the PLC control system. The top part between the plunger cylinder and the plunger is provided with a third sealing ring for sealing the gas. When the PLC control system detects that the pressure sensor signal in the gas and sealing medium leakage detection port exceeds the set range value, an alarm signal is sent to the staff, the staff judges the fault as the third sealing ring leaking gas or the first sealing ring leaking sealing medium, if there is liquid leakage, the fault is the first sealing ring, and if there is no liquid leakage, the fault is the third sealing ring. When the PLC control system detects that the pressure sensor signal in the sealing medium leakage detection port exceeds the set range value, an alarm signal is sent to the staff, and the staff judges the fault as the second sealing ring.

2. A method of detecting leakage in a cylinder of a cyclic liquid seal compressor plunger according to claim 1, characterized in that: The inner wall of the plunger cylinder corresponding to the gas and sealing medium leakage detection port is provided with a second annular groove cavity.

3. A method of detecting a leak in a cylinder of a cyclically-sealing compressor plunger according to claim 1, wherein: The inner wall of the plunger cylinder corresponding to the sealing medium leakage detection port is provided with a third annular groove cavity.

4. A method of detecting a leak in a cylinder of a cyclic liquid seal compressor plunger according to claim 1, wherein: The first annular groove cavity is arranged on the inner wall of the plunger cylinder, and the sealing medium circulates in the first annular groove cavity to seal, cool and lubricate the plunger.

5. A method of detecting a leak in a cylinder of a cyclically-sealing compressor plunger according to claim 1, wherein: The sealing medium comprises a liquid medium, and the liquid medium comprises a magnetic liquid or an ionic liquid.

6. A method of detecting a leak in a cylinder of a cyclically-sealing compressor plunger according to claim 1, wherein: The outer surface of the plunger is provided with a plurality of guide rings.

7. A method of detecting a leak in a cylinder of a cyclically-sealing compressor plunger according to claim 1, wherein: The lower side of the sealing medium leakage detection port is provided with a fourth sealing ring, and the fourth sealing ring is used to prevent the sealing medium from overflowing out of the plunger cylinder when the second sealing ring fails.

8. A method of detecting a leak in a cylinder of a hermetic compressor piston according to claim 7, characterized in that: The first sealing ring, the second sealing ring and the fourth sealing ring are all mounted on the inner wall of the plunger cylinder.

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