CN201779019U - Air inlet flow adjusting valve of high-displacement screw air compressor - Google Patents

Air inlet flow adjusting valve of high-displacement screw air compressor Download PDF

Info

Publication number
CN201779019U
CN201779019U CN2010202765132U CN201020276513U CN201779019U CN 201779019 U CN201779019 U CN 201779019U CN 2010202765132 U CN2010202765132 U CN 2010202765132U CN 201020276513 U CN201020276513 U CN 201020276513U CN 201779019 U CN201779019 U CN 201779019U
Authority
CN
China
Prior art keywords
valve
control gas
joint
servo cylinder
gas inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010202765132U
Other languages
Chinese (zh)
Inventor
高宝华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Screw Compressor Co Ltd
Original Assignee
Shanghai Screw Compressor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Screw Compressor Co Ltd filed Critical Shanghai Screw Compressor Co Ltd
Priority to CN2010202765132U priority Critical patent/CN201779019U/en
Application granted granted Critical
Publication of CN201779019U publication Critical patent/CN201779019U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

The utility model relates to a gas inlet flow adjusting valve of a high-displacement screw gas compressor, which is characterized in that a support is mounted on a butterfly valve, the front end of a double-acting servo cylinder is connected with a valve plate rotating shaft of the butterfly valve while the rear end is connected with the support, a two-position three-way electromagnetic valve and a gas inlet bypass adjusting block are directly mounted on the butterfly valve, control gas from oil gas barrel of the air compressor is respectively connected with control gas inlets of the two-position three-way electromagnetic valve, a direct proportion valve and a pressure adjusting valve, one channel of an exhaust opening of the two-position three-way electromagnetic valve is connected with a control gas inlet at the rear end of the servo cylinder through a connecting pipeline and a joint while the other channel of the exhaust opening is connected with an air release valve, the air release valve is connected with the air inlet bypass adjusting block through a joint, an exhaust opening of the pressure adjusting valve is connected to a control gas inlet of the front end of the servo cylinder through a pipeline and a joint, one end of a one-way valve is connected to the a control gas inlet at the front end of the servo cylinder through a pipeline and a joint while the other end of the one-way valve is connected to the control gas inlet of the direct proportion valve, number of reverse turns of a machine head is small, and the service life of a shaft seal is prolonged.

Description

Big displacement screw air compressor air intake flow control valve
Technical field
The utility model relates to a kind of big displacement screw air compressor, relates in particular to a kind of structure of big displacement screw air compressor air intake flow control valve.
Background technique
Usually the air compressor user always selectes the flow of air compressor according to the operating mode of gas consumption maximum, for the volume flow that makes air compressor and the gas consumption of actual conditions reach balance, be everlasting and adopt methods such as rotational speed regulation, air inlet restriction adjusting, stall adjusting in the unit, wherein the air inlet restriction regulating method has obtained to use widely in fuel injection helical lobe compressor.By on the sucking pipe of helical-lobe compressor, installing suction throttling valve additional, utilize air-breathing throttling, just can realize regulating the volume flow of compressor.
At present the used intake-air throttle valve of industry often have open, normally closed two kinds of forms.For big displacement screw air compressor, often drive air valve into if adopt, it is bigger then to start immediate current, thereby electric elements type selectings such as contactor, sky switch are proposed high requirement; If adopt common normal close type suction valve, when big displacement screw air compressor research and development and start debugging, its air inlet bypass is regulated and is often adopted the method that has level to change by-pass hole bore or the pre-opening angle of step-less adjustment dish plate to realize that operation is difficulty relatively.Though common suction valve possesses check function, for big discharge capacity air compressor, because barrel of oil and gas and gas exhaust piping capacity are bigger, the head 5-7 circle that often will reverse during shutdown, thus quicken the inefficacy of head axle envelope.
Summary of the invention
The utility model technical issues that need to address have provided a kind of big displacement screw air compressor air intake flow control valve, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the utility model is achieved through the following technical solutions:
The utility model comprises: valve setting valve, double-action servo cylinder, support, direct proportaion valve, air inlet bypass regulating block, two-bit triplet solenoid valve, atmospheric valve, pressure regulator valve, one-way valve and connecting pipeline and joint; Wherein: support is installed on the butterfly valve, and the front end of double-action servo cylinder links to each other with the valve plate rotating shaft of butterfly valve, and the rear end links to each other with support; Two-bit triplet battery valve and air inlet bypass regulating block are directly installed on the butterfly valve; The control gas that comes from air compressor oil-gas barrel enters the mouth by the control gas that joint and connecting pipeline are connected two-bit triplet battery valve, direct proportaion valve and pressure regulator valve respectively; The relief opening of two-bit triplet battery valve by connecting pipeline and joint one tunnel and servo cylinder rear end control gas inlet link to each other, another road links to each other with atmospheric valve; Atmospheric valve links to each other with air inlet bypass regulating block by joint; The pressure regulator valve relief opening is connected to the front-end control gas inlet of servo cylinder by pipeline and joint; One-way valve enters the mouth by the front-end control gas that pipeline and joint one end are connected to servo cylinder, and the other end is connected to the control gas inlet of direct proportaion valve.
Compared with prior art, the beneficial effects of the utility model are: inrush current is little, and open-close convenient is rapid, and adjusting function is good, and the head counter-rotating number of turns is few, and the axle envelope life-span prolongs.
Description of drawings
Fig. 1 is the utility model one embodiment's a structural representation.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:
As shown in Figure 1, the utility model comprises: valve setting valve 1, double-action servo cylinder 9, support 8, direct proportaion valve 5, air inlet bypass regulating block 2, two-bit triplet solenoid valve 4, atmospheric valve 3, pressure regulator valve 7, one-way valve 6 and connecting pipeline 11 and joint 10; Wherein: support 8 is installed on the butterfly valve 1, and the front end of double-action servo cylinder 9 links to each other with the valve plate rotating shaft of butterfly valve 1, and the rear end links to each other with support 8; Two-bit triplet battery valve 4 and air inlet bypass regulating block 2 are directly installed on the butterfly valve 1; The control gas that comes from the air compressor oil-gas barrel (not shown) enters the mouth by the control gas that joint 10 and connecting pipeline 11 are connected two-bit triplet battery valve 4, direct proportaion valve 5 and pressure regulator valve 7 respectively; The relief opening of two-bit triplet battery valve 4 by connecting pipeline and joint one tunnel and servo cylinder 9 rear ends control gas inlet link to each other, another road links to each other with atmospheric valve 3; Atmospheric valve 3 links to each other with air inlet bypass regulating block 2 by joint; Pressure regulator valve 7 relief openings are connected to the front-end control gas inlet of servo cylinder 9 by pipeline and joint; One-way valve 6 enters the mouth by the front-end control gas that pipeline and joint one end are connected to servo cylinder 9, and the other end is connected to the control gas inlet of direct proportaion valve 5.
Adopt unit of the present utility model to have four kinds of working state: A, state of starting operating; B, load operation operating mode C, adjusting operating conditions; D, unloading operating mode.
Type with rated pressure 8bar (116psi) is that example is introduced its working principle respectively below.
Butterfly valve is normally closed
The direct proportaion valve is normally closed
The two-bit triplet solenoid valve is often opened (1﹠amp; 2 disconnect 1﹠amp; 3 connect)
Atmospheric valve is normally closed
Pressure regulator valve 3bar
State of starting operating:
Press start key, electric motor starting, the compressor suction valve sucks a small amount of gas by air inlet bypass regulating block 2, two-bit triplet solenoid valve 4 is not temporarily, this moment, atmospheric valve 3 opened that (pressurized air is divided into two-way in air inlet bypass regulating block 2, the one tunnel releases before the suction valve valve plate, releases behind the suction valve valve plate in another road, can reach the purpose of noise when weakening unloading like this, the two-way latus rectum can be by adjusting bolt step-less adjustment up and down) make deaerator be in the emptying state; A small amount of gas of start moment suction enters servo cylinder 9 rear ends control gas inlet by two-bit triplet solenoid valve 4 forces butterfly valve 1 to be closed, bypass channel on the air inlet bypass regulating block 2 (its latus rectum can also by regulating the bolt step-less adjustment) allows a spot of air to enter compressor, its start pressure is maintained in 1.5-3.5bar (22-51psi) scope substantially, its value of the compressor of different size is inconsistent, and compressor has been realized light-load starting.
The load operation operating mode:
Behind set time (be generally 6-10 second), the motor full speed running, at this moment, two-bit triplet solenoid valve 4, atmospheric valve 3 cuts out, air-breathing vacuum action is at servo cylinder 9 rear ends control gas inlet, (generally be set in 3bar through pressure regulator valve 7, its effect is to unload preceding moment when holding to transfer to, the suction valve valve plate guarantees to have corresponding minimum aperture, up to unloading beginning) control gas act on servo cylinder 9 front-end control gas inlet, butterfly valve 1 is all opened, the compressor loads operation, system pressure is raised to 4.0bar (60psi) rapidly.
When system pressure surpassed 4.0bar (60psi), minimum pressure valve was opened, and unit begins outside air feed.At this moment, two-bit triplet solenoid valve 4 maintains electricity, and butterfly valve 1 is in full-gear, the unit load operation.Subsequently, system pressure reaches rated pressure very soon, and unit enters normal operating conditions.Unless client's gas consumption changes, then operation continuously under this state of unit.
Regulate operating conditions:
When client's gas consumption during less than specified air displacement, intrasystem pressure will raise.(to the 8Bar unit is that exhaust pressure is when reaching 8.06-8.13Bar (117-118psi) when pressure surpasses rated pressure 0.06 to 0.13Bar (1-2psi), 5 actions of direct proportaion valve, control gaseous enters servo cylinder 9 rear ends control gas inlet, reduce the aperture of butterfly valve 1, thereby reduce the air inflow of compressor.The restriction effect of butterfly valve 1 is directly proportional with line pressure, and line pressure is big more, and butterfly valve 1 aperture is just more little, and restriction effect is just obvious more.The tolerance regulation range of this direct proportaion valve 5 is 100%~20%, and this moment, corresponding line pressure was 8.07~8.6bar (117~125psi).At this moment, two-bit triplet solenoid valve 4 continues to maintain.
If at this moment compressed-air actuated demand increases, the pressure in the deaerator can descend.When pressure drops to the pressure set points that is lower than direct ratio row valve 5, direct proportaion valve 5 will cut out, and all open thereby control butterfly valve 1, so unit full load operation again.
The unloading operating mode:
When client's gas consumption continue to be reduced to less than the specified air displacement of compressor 20% the time, line pressure will be above the setting value 8.6bar (125psi) of controller (pressure switch), at this moment, the normally-closed contact of controller (pressure switch) disconnects, cut off the power supply of two-bit triplet solenoid valve 4, control gas enters servo cylinder rear end control gas inlet by two-bit triplet solenoid valve 4, and butterfly valve 1 cuts out.This moment, atmospheric valve 3 was opened, and the pressurized air in the deaerator is bled off, and relied on a small amount of air inlet of bypass passageways of air inlet bypass regulating block 2, and unit pressure maintains in 1.5~3.5bar (22-51psi) scope, has guaranteed the circulation of lubricant oil in the oil-way system.In this pressure range, minimum pressure valve is closed, and user's pipeline and unit are cut off, and unit will no-load running under a lower back pressure, saves energy consumption.
If at this moment client's gas consumption increases, then line pressure descends.When pressure is lower than 7.3bar (106psi), the pressure switch contact closure, two-bit triplet solenoid valve 4 again, atmospheric valve 3 cuts out, pressurized air in the deaerator stops emptying, and air-breathing vacuum action is at servo cylinder 9 rear ends control gas inlet, and the control gas of process pressure regulator valve 7 (generally being set in 3bar) acts on servo cylinder front-end control gas inlet, butterfly valve 1 is opened thereupon, and compressor enters the load operation state again.
Shutdown is divided into general shutdown and emergency shutdown.
The general shutdown
After pressing stop botton, two-bit triplet solenoid valve 4 dead electricity, control gas enters servo cylinder rear end control gas inlet by two-bit triplet solenoid valve 4, and butterfly valve 1 cuts out.Simultaneously, atmospheric valve 3 is opened, the air in the deaerator is drained in the atmosphere, and after time-delay in 15 seconds, when treating certain value that the pressure in the oil drum falls, the motor stall.
Emergency shutdown
When delivery temperature surpasses 110 ℃ or motor and causes the overcurrent protective device action because of overload, power supply will be cut off, and motor is stall at once, two-bit triplet solenoid valve 4 dead electricity simultaneously, and atmospheric valve 3 is opened, and suction valve cuts out.Have only when unit abnormal conditions occur in running, just allow to press the emergency shutdown button, otherwise may cause system down.
The utility model cancellation non-return mechanism, when the screw air compressor system design, be used in combination with venting check valve and oil cut-off valve, check function is moved forward to relief opening and jet, thereby reducing the head counter-rotating impacts, the exemplary application proof head counter-rotating number of turns is reduced to below 2 circles, has prolonged the head axle greatly and has sealed working life.Venting check valve can prevent that the barrel of oil and gas compressed air from flowing backwards, and causes rotor counter-rotating and oil laden air to spray from air-strainer.Oil cut-off valve cut out when compressor stopped, and the back pressure machine host inlet that contracts is emerged from breathing filter otherwise oil separator, oil cooler inner high voltage lubricant oil flow backwards in a large number, pollutes air-breathing filter core.During start, oil cut-off valve is opened under the control of compressor host exhaust pressure, guarantees that oil circuit is unimpeded.

Claims (1)

1. one kind big displacement screw air compressor air intake flow control valve is characterized in that comprising: valve setting valve, double-action servo cylinder, support, direct proportaion valve, air inlet bypass regulating block, two-bit triplet solenoid valve, atmospheric valve, pressure regulator valve, one-way valve and connecting pipeline and joint; Wherein: support is installed on the butterfly valve, and the front end of double-action servo cylinder links to each other with the valve plate rotating shaft of butterfly valve, and the rear end links to each other with support; Two-bit triplet battery valve and air inlet bypass regulating block are directly installed on the butterfly valve; The control gas that comes from air compressor oil-gas barrel enters the mouth by the control gas that joint and connecting pipeline are connected two-bit triplet battery valve, direct proportaion valve and pressure regulator valve respectively; The relief opening of two-bit triplet battery valve by connecting pipeline and joint one tunnel and servo cylinder rear end control gas inlet link to each other, another road links to each other with atmospheric valve; Atmospheric valve links to each other with air inlet bypass regulating block by joint; The pressure regulator valve relief opening is connected to the front-end control gas inlet of servo cylinder by pipeline and joint; One-way valve enters the mouth by the front-end control gas that pipeline and joint one end are connected to servo cylinder, and the other end is connected to the control gas inlet of direct proportaion valve.
CN2010202765132U 2010-07-30 2010-07-30 Air inlet flow adjusting valve of high-displacement screw air compressor Expired - Fee Related CN201779019U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010202765132U CN201779019U (en) 2010-07-30 2010-07-30 Air inlet flow adjusting valve of high-displacement screw air compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010202765132U CN201779019U (en) 2010-07-30 2010-07-30 Air inlet flow adjusting valve of high-displacement screw air compressor

Publications (1)

Publication Number Publication Date
CN201779019U true CN201779019U (en) 2011-03-30

Family

ID=43792231

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010202765132U Expired - Fee Related CN201779019U (en) 2010-07-30 2010-07-30 Air inlet flow adjusting valve of high-displacement screw air compressor

Country Status (1)

Country Link
CN (1) CN201779019U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104653462A (en) * 2014-04-25 2015-05-27 柳州富达机械有限公司 Volume flow adjusting device of compressor
CN105134609A (en) * 2015-10-12 2015-12-09 南通市红星空压机配件制造有限公司 Air inlet valve for screw vacuum pump
CN107664112A (en) * 2016-07-28 2018-02-06 苏州寿力气体设备有限公司 Intake valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104653462A (en) * 2014-04-25 2015-05-27 柳州富达机械有限公司 Volume flow adjusting device of compressor
CN105134609A (en) * 2015-10-12 2015-12-09 南通市红星空压机配件制造有限公司 Air inlet valve for screw vacuum pump
CN105134609B (en) * 2015-10-12 2017-06-16 南通市红星空压机配件制造有限公司 A kind of intake valve for screw vacuum pump
CN107664112A (en) * 2016-07-28 2018-02-06 苏州寿力气体设备有限公司 Intake valve
CN107664112B (en) * 2016-07-28 2019-05-28 苏州寿力气体设备有限公司 Intake valve

Similar Documents

Publication Publication Date Title
CN1039639A (en) The charged piston internal-combustion engine that several exhaust-gas turbochargers in parallel are arranged
CN201779019U (en) Air inlet flow adjusting valve of high-displacement screw air compressor
RU2528768C2 (en) Method of compressor control
CN201013559Y (en) Air-intake lifting valve
CN203214165U (en) Turbocharger with variable section
CN202250869U (en) Gas circuit control system of screw compressor
CN102182544A (en) Air inlet regulating device of flow-passage-changeable turbine
CN113969829A (en) Supercharger bypass system
RU2426011C2 (en) Method of controlling turbo compressor
CN204827931U (en) Vacuum control device is prevented to screw rod host computer
CN101457689A (en) Method for operating a compressor
JPH0610876A (en) Capacity control method for lubricating screw compressor
CN101649784A (en) Brake managing system of engine
CN201779018U (en) Oil pressure control air inlet valve for oilless screw compressor
CN201396284Y (en) Gas quantity proportion regulation control system of air compressor
CN206785638U (en) A kind of bavin moves screw compressor control system
CN112648168B (en) Reciprocating compression expander
CN100582538C (en) Safe buffering two-way valve
CN206054232U (en) The adjustable energy-saving air compressor of distributive value
CN110714804B (en) Bypass control system suitable for CAES system expansion unit
CN201496153U (en) Engine brake management system
CN103375391A (en) Compressor energy regulation mechanism and operating process thereof
CN208996953U (en) A kind of protection structure for shutting down oil-break for two stages of compression screw air compressor
CN201535385U (en) Hammer/energy accumulator composite hydraulic control slowly closing valve actuator
CN216642427U (en) Compressor control system

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110330

Termination date: 20130730