Piston compressor inlet and outlet and backflow increasing stop valve

Abstract

The utility model provides a piston compressor inlet and outlet and backflow increasing stop valve which comprises a piston compressor body, a first compressor inlet buffer tank, an interstage separator, a first compressor outlet buffer tank, a second compressor outlet buffer tank and a second compressor inlet buffer tank. A pneumatic emergency cut-off valve and a pneumatic control valve are installed at a secondary gas outlet of the piston compressor body, a pneumatic control valve A is installed at the position of a one-return-one pipeline from a primary outlet to a primary inlet of the piston compressor body, and a pneumatic control valve B is installed at the position of a two-return-one pipeline from a secondary outlet to a primary inlet of the piston compressor body. According to the utility model, the compressor can be automatically / remotely started and stopped; the pressure and the flow are automatically adjusted; according to the utility model, functions such as automatic emptying under overpressure and automatic adjustment of the reflux valve are realized, when the device is started, 4-5 persons are required originally on site to 1-2 persons, and the starting operation speed is obviously increased.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cut -off valve technical field relates to piston compressor import and export and backflow increase cut -off valve. BACKGROUND

[0002] In view that the process equipment of the dangerous chemical enterprise at present, such as most piston compressors in use, especially the chemical plant designed before 2020, most of them do not reach the requirements of full automatic control:

[0003] 1) can be automatically started / stopped remotely;

[0004] 2) can automatically adjust pressure, flow;

[0005] 3) overpressure automatic emptying, automatic regulation backflow valve etc.

[0006] Now piston compressor unit, especially large unit, valve is bigger, and all are manual gate valve or stop valve, and opening and closing all need 3-4 people to use force lever slowly open in a circle, that is, need more personnel, also lead to slow process, prolong the start / stop time, also lead to more operating site personnel, do not reach the requirement of emergency management department that try to reduce the site operating personnel during start / stop. SUMMARY

[0007] The utility model discloses a piston compressor import and export and backflow increase cut -off valve to solve the problem in the above -mentioned background art.

[0008] The utility model discloses a piston compressor import and export and backflow increase cut -off valve, including piston compressor body, compressor inlet buffer tank one, interstage separator, compressor outlet buffer tank one, compressor outlet buffer tank two and compressor inlet buffer tank two, the two stage gas outlet of piston compressor body installs pneumatic emergency cut -off valve and pneumatic regulating valve, the first stage outlet of piston compressor body to first stage inlet one back one pipeline installs pneumatic regulating valve A, the second stage outlet of piston compressor body to first stage inlet two back one pipeline installs pneumatic regulating valve B, the first stage inlet pipeline of piston compressor body is connected compressor inlet buffer tank one, interstage separator, compressor outlet buffer tank one, compressor outlet buffer tank two and compressor inlet buffer tank two, the bottom of compressor inlet buffer tank one, the bottom of interstage separator, the bottom of compressor outlet buffer tank one, the bottom of compressor outlet buffer tank two and the bottom of compressor inlet buffer tank two are installed respectively electromagnetic valve one, electromagnetic valve two, electromagnetic valve three, electromagnetic valve four, electromagnetic valve five.

[0009] In the piston compressor inlet and outlet and backflow increase cut-off valve, the pneumatic emergency cut-off valve and the pneumatic regulating valve, the pneumatic regulating valve B, the pneumatic regulating valve A, the electromagnetic valve one, the electromagnetic valve two, the electromagnetic valve three, the electromagnetic valve four, the electromagnetic valve five are all signal connected with the PLC controller.

[0010] In the piston compressor inlet and outlet and backflow increase cut-off valve, the auxiliary pneumatic emergency cut-off valve is installed at the gas inlet pipe of the piston compressor body.

[0011] Compared with the prior art, the piston compressor inlet and outlet and backflow increase cut-off valve has the advantages that the compressor can be automatically / remotely started and stopped, the pressure and flow are automatically adjusted, the overpressure is automatically vented, the backflow valve is automatically adjusted, and the starting operation speed is obviously improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the flow schematic diagram of the piston compressor inlet and outlet and backflow increase cut-off valve.

[0013] In the figure, 1 is a piston compressor body, 2 is a compressor inlet buffer tank one, 3 is an interstage separator, 4 is a compressor outlet buffer tank one, 5 is a compressor outlet buffer tank two, 6 is a compressor inlet buffer tank two, 7 is a pneumatic emergency cut-off valve, 8 is a pneumatic regulating valve, 9 is a pneumatic regulating valve B, 10 is a pneumatic regulating valve A, 11 is an electromagnetic valve one, 12 is an electromagnetic valve two, 13 is an electromagnetic valve three, 14 is an electromagnetic valve four, 15 is an electromagnetic valve five, and 16 is an auxiliary pneumatic emergency cut-off valve. DETAILED DESCRIPTION

[0014] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0015] As shown in the figure, the piston compressor inlet and outlet and backflow increase cut-off valve, Figure 1

[0016] The piston compressor inlet and outlet and backflow increase cut-off valve comprises a piston compressor body 1, a compressor inlet buffer tank one 2, an interstage separator 3, a compressor outlet buffer tank one 4, a compressor outlet buffer tank two 5, a compressor inlet buffer tank two 6, a pneumatic emergency cut-off valve 7 and a pneumatic regulating valve 8 are installed at the two-stage gas outlet of the piston compressor body 1, and the specific embodiment 1 is that on the basis of the original one manual gate valve at the compressor inlet, a new pneumatic ball valve KV7201 with the same caliber is added, the slow opening and quick closing functions can be realized by positioning the pneumatic ball valve, and the pneumatic ball valve can be quickly cut off in the case of an emergency of the compressor.

[0017] ​Specific implementation 2: On the basis of two manual stop valves and one check valve at the secondary gas outlet of the compressor, one pneumatic emergency cut-off valve KV7202 and one pneumatic regulating valve (with feedback) HV7213 are installed. The pneumatic emergency cut-off valve KV7202 can quickly cut off when the compressor has an emergency; the pneumatic regulating valve (with feedback) HV7213 can replace manual operation and can be opened to any position to adjust the compressor outlet pressure, flow and other parameters in the control room, greatly saving manpower.

[0018] Specific implementation 3: On the basis of two manual stop valves at the primary outlet to the primary inlet of the compressor, one pneumatic regulating valve HV7211 of the same caliber is installed to replace the manual valve with extremely high labor intensity, to adjust the primary outlet pressure and flow, and to ensure that the primary outlet pressure meets the compressor curve requirements.

[0019] Specific implementation 4: On the basis of two manual stop valves and one check valve at the secondary outlet to the primary inlet of the compressor, one pneumatic regulating valve HV7212 of the same caliber is installed to replace the manual valve with extremely high labor intensity, to adjust the secondary outlet pressure and flow, and to ensure that the secondary outlet pressure meets the compressor curve requirements.

[0020] Specific implementation 5: Manual blowdown valves at the bottom of the interstage separator S01 on the primary inlet pipeline of the compressor, the bottom of the compressor inlet buffer tank DVB01 / DVB02, and the bottom of the compressor outlet buffer tank SVB01 / SVB02 are each installed with one electromagnetic valve DV01-DV05 of the same caliber to replace the manual blowdown operation.

[0021] Specific implementation 6: The operation signals of the three pneumatic regulating valves, two pneumatic emergency cut-off valves and five electromagnetic valves are connected to the special PLC (arranged in the control room) through corresponding cables, and then transmitted to the DCS through signal lines; the operation and interlocking control are realized through the PLC, and the monitoring function is realized through the DCS.

[0022] Alternatively, specific implementation 7: The operation signals of the three pneumatic regulating valves, three pneumatic emergency cut-off valves and five electromagnetic valves can be connected to the DCS through corresponding cables; the operation, interlocking, control and monitoring functions of the valves are realized through the DCS configuration.

[0023] What is not described in detail in the specification belongs to the prior art known to those skilled in the art. The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A piston compressor inlet and outlet and backflow increase cut-off valve comprising a piston compressor body (1), a compressor inlet buffer tank one (2), an inter-stage separator (3), a compressor outlet buffer tank one (4), a compressor outlet buffer tank two (5) and a compressor inlet buffer tank two (6), characterized in that, The piston compressor body (1) is provided with a pneumatic emergency cut-off valve (7) and a pneumatic regulating valve (8) at the secondary gas outlet, a pneumatic regulating valve A (10) at the one-way pipeline from the primary outlet to the primary inlet, and a pneumatic regulating valve B (9) at the one-way pipeline from the secondary outlet to the primary inlet; the primary inlet pipeline of the piston compressor body (1) is connected with a compressor inlet buffer tank one (2), an inter-stage separator (3), a compressor outlet buffer tank one (4), a compressor outlet buffer tank two (5), and a compressor inlet buffer tank two (6); the bottom of the compressor inlet buffer tank one (2), the bottom of the inter-stage separator (3), the bottom of the compressor outlet buffer tank one (4), the bottom of the compressor outlet buffer tank two (5), and the bottom of the compressor inlet buffer tank two (6) are respectively provided with an electromagnetic valve one (11), an electromagnetic valve two (12), an electromagnetic valve three (13), an electromagnetic valve four (14), and an electromagnetic valve five (15).

2. The inlet and outlet and backflow increase cut-off valve of a piston compressor according to claim 1, characterized in that, The system further comprises a PLC controller, and the pneumatic emergency cut-off valve (7), the pneumatic regulating valve (8), the pneumatic regulating valve B (9), the pneumatic regulating valve A (10), the electromagnetic valve one (11), the electromagnetic valve two (12), the electromagnetic valve three (13), the electromagnetic valve four (14), and the electromagnetic valve five (15) are signal-connected with the PLC controller.

3. The inlet and outlet and backflow increase cut-off valve of a piston compressor according to claim 1, characterized in that, The piston compressor body (1) is provided with an auxiliary pneumatic emergency cut-off valve (16) at the gas inlet pipeline.

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