CN2230301Y - Multi-function micro-pressure control cabinet for recovering oil and gas - Google Patents
Multi-function micro-pressure control cabinet for recovering oil and gas Download PDFInfo
- Publication number
- CN2230301Y CN2230301Y CN 95216036 CN95216036U CN2230301Y CN 2230301 Y CN2230301 Y CN 2230301Y CN 95216036 CN95216036 CN 95216036 CN 95216036 U CN95216036 U CN 95216036U CN 2230301 Y CN2230301 Y CN 2230301Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- compressor
- voltage
- pressure
- control
- 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
Links
Images
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model relates to a multifunctional micro-pressure control cabinet for recovering oil gas, which is an electric device which is regulated continuously and automatically. The voltage which can reflect the pressure changes of an oil storage tank is compared with a voltage phase which can represent safety constant voltage and is set by the utility model. The difference value is converted into electric current for adjusting the rotary speed of a compressor by a frequency-variable speed adjuster. When the difference value is larger, the utility model can automatically complete the compressor increase operation according to the instruction of a read-only memory by compressor increase and decrease logical processing to make the pressure in the oil storage tank rapidly drop to the safety value. When the pressure in the oil storage tank is lower than the lower limit level, besides the automatic compressor increase and decrease of the utility model, the controller of an electrical adjustment valve can close an analog switch according to the comparison of the voltage value of actual pressure and the voltage value of the upper and the lower limits of a safety pressure range to make the electrical adjustment valve opened for supplying gas to the oil storage tank. The utility model has the advantages that the pressure in the oil storage tank can be kept constantly, and the natural gas in the oil storage tank can be completely recovered. The utility model has the advantages of high automation degree, accuracy, and reliability, and can be widely applied to the systems, such as the recovery of the natural gas at the tank top of the sealed oil tank, the recovery of the process tail gas of oil refineries, the condensing recovery of the volatilized oil gas at the top of a gasoline tank.
Description
The utility model belongs to automatic control device, relates to a kind of continuous self-regulating electric apparatus.
The recovery of tank deck natural fuels at present has two kinds of schemes, and big jar of closed quantitative of the first extracts, during negative pressure through constant pressure valve draw pressurized natural gas automatically covering go into jar, weak point is under the inclement weather condition, is prone to engine failure and causes the accident.Its two be big jar not airtight, look being connected on the big leather bag gas charging degree of tank deck, manual regulation swept volume, weak point is that adjusting can not be timely, and excessive bleeding easily makes big jar of entrained air cause spontaneous combustion, so use this programme not to be principle as negative pressure with big jar, natural fuels can only be partially recycled, and part emptying is lighted.
The purpose of this utility model provides a kind of permanent tank deck safety atmospheric pressure value that keeps, and the multifunctional oil gas that natural fuels can all reclaim reclaims the minute-pressure control housing, to remedy the deficiencies in the prior art.
Above-mentioned purpose obtains by the following technical programs: this cabinet is accepted the current signal of the expression tank deck air pressure of differential pressure transmitter (18), through sampling resistor R1, R2 is converted to voltage signal UP1, UP2, deliver to separate central control unit and electricity accent valve control respectively, in the central control unit, the magnitude of voltage UP1 of expression tank deck air pressure and reference voltage U0 relatively after, be converted to current signal and on-off signal, control compressor rotary speed respectively and add and subtract compression board number automatically, magnitude of voltage UP1 also with the U that sets on, U down relatively, when governor sends breakdown signal, its difference control compressor start and stop, the magnitude of voltage UP2 of same expression tank deck air pressure transfers in the valve control at electricity and opens the folding that comparison automatic guidance electricity is transferred valve with U pass of setting and U, and central control unit is made up of following circuit:
Pressure is set relatively amplifying circuit (1), sets the reference voltage U of the constant safe pressure value of expression tank deck
o, and with UP1 relatively, its difference through amplify △ UP1;
U/I translation circuit (2) is exchanged into linear 4-20mA electric current with △ UP1 and exports variable-frequency governor to from this cabinet;
Two limit comparator circuit I (3) add U with the value of the limiting U of △ UP1 and plus-minus compressor operating platform number and subtract and compare;
Plus-minus compressor operating platform is counted logic control circuit (4), and when △ UP1＞U adds, and each compressor is when being non-power frequency operation, or subtracts as △ UP1＜U, and certain compressor is power frequency when seeing off, this circuit output single impulse CP;
Compressor cycle starts gating circuit (5), with the CP step-by-step counting of circuit (3), as the circulation address code of read-only memory;
Reserve machine displacement gating circuit (6), switch is set the reserve machine status code, and inserts latch, and its output becomes the read-only memory address code with the circulation address code combination of circuit (5);
Read-only memory circuit (7) writes---power frequency---frequency conversion or the standby instruction that circulates and switch successively by frequency conversion of each compressor;
Variable-frequency governor is forced back null circuit (8), and when △ UP1＞U adds, and during the non-power frequency operation of each compressor, this circuit makes the CP pulse delay relay J R adhesive of this circuit and kept J 1.7 seconds
RConnect the null circuit that returns of variable-frequency governor;
Compressor soft start time delay circuit (9), with the operating instruction time-delay frequently 0.23～0.37 second of changing a job of the converting operation of circuit (7), with season another compressor drop into converting operation instruction time-delay 1 second;
Two limit comparator circuit II (10), the stop voltage U that expression tank deck air pressure safe range is set for emergency operating goes up, under the U, and compares with UP1;
Emergent start and stop compressor Control Cprant (11), the output signal of circuit (10) acts on bistable circuit, as UP1＞U on the last or U＞and UP1＞U following time, the control relay JJ adhesive of this circuit is the pacing factor of emergency starting compressor;
Emergent start and stop compressor executive circuit (12), carrying out relay FX is controlled jointly by the control relay JJ of circuit (11) and the intermediate relay JS of this circuit, JS is controlled by variable-frequency governor fault contact, the variable-frequency governor of disengagement failure and being connected of electrical network when the FX adhesive, the compressor with converting operation directly is connected with electrical network simultaneously;
Electricity transfers valve control to be made up of following circuit:
Two limit comparator circuit III (13), the bound voltage of setting expression tank deck pressure security scope is transferred valve pass valve limit and opened valve limit reference voltage for electricity is that U closes, U opens, and compares with UP2;
Analog switch control circuit (14), when UP2＜U opens, analog switch CD4066 conducting, output voltage becomes 4-20mA linear change current signal from the output of this cabinet through potential device W to U/I translation circuit, and when UP2＞U closes, analog switch ends.
Electricity transfers valve control also to be provided with sound light alarming circuit (16).
Describe the technical program in detail with drawings and Examples below:
Accompanying drawing 1 the utility model electricity functional block diagram
Accompanying drawing 2 pressure are set relatively amplifying circuit (1) electrical schematic diagram
Accompanying drawing 3 pairs of limits comparator circuit I (3) plus-minus compressor operating platform is counted logic control circuit (4) compressor cycle startup gating circuit (5) read-only memory circuit (7) variable-frequency governor and is forced back null circuit (8) electrical schematic diagram.
Instruction of accompanying drawing 4 read-only memorys and address code mapping table
Accompanying drawing 5 reserve machines displacement gating circuit (6) electrical schematic diagram
Emergent start and stop compressor executive circuit (12) electrical schematic diagram of the emergent start and stop compressor Control Cprant (11) of accompanying drawing 6 pairs of limits comparator circuit II (10).
7 pairs of limits of accompanying drawing comparator circuit III (13) analog switch control circuit (14) sound light alarming circuit (16) electrical schematic diagram
This control housing working process as shown in Figure 1 is, the tank deck air pressure of big pot of oil storage (23) is recorded by differential pressure transmitter (18), the 24V dc voltage conversion that guard grating (15) is provided becomes the 4-20mA electric current with the air pressure linear change, become equivalent voltage UP1 and the UP2 of 1-5V through sampling resistor R1, R2, circuit (1) is with the reference voltage U of UP1 and setting
oThe amplification of comparing, its difference △ UP1 becomes 4-20mA electric current through circuit (2) and exports variable-frequency governor to, the compressor rotary speed of control converting operation, promptly adjust swept volume, make tank deck air pressure perseverance remain on optimum value, when coming the tolerance surge, △ UP1 exceeds the upper limit of safety value 3-10V, it is △ UP1＞U added-time, this control housing is finished automatically and is added platform work, so that tank deck air pressure falls after rise rapidly to steady state value, now with three compressors for " two open one be equipped with " common configuration is illustrated, the △ UP1 that exceeds 10V be added in Fig. 3 by IC3, two limit comparator circuit I (3) that the IC4 amplifier is formed, a point is a high level in the circuit, the initial automatic clear of working makes the Q of counting machine IC6 (74LS107)
0Q
1The circulation address code is oo, so the output command of read-only memory IC7 only is decided by K in Fig. 5 circuit (6)
0K
1Status code, the 1J termination active potential of IC10 for example, the 2J termination high potential of IC11, press the button AN among Fig. 3, this quenching pulse is inserted latch through the IC9 time-delay with on off state, then the combination of address sign indicating number of IC7 is 0100, can find out that from Fig. 4 table the instruction of this address represents A machine converting operation, this moment, A ' B ' C ' mouth of IC7 was high level, d=0 e=1 then, door I output makes counting machine IC6 counting through the monostable generation single impulse of IC5 CP, Q1Q0 is 01, then the A machine switches to power frequency operation by frequency conversion, and the B machine inserts variable-frequency governor, has realized adding the purpose of platform, meanwhile, because of f=1, the CP pulse triggers monostable IC8 by door V, relay J R adhesive, connecting pressure in the variable-frequency governor returns null circuit and makes it output voltage and be zero with frequency, and kept 1.7 seconds, from zero start, actv. had solved current impact when the B machine inserted, this moment is if a point continues to occur high level, because of A ' is low level event d=1e=0, door I no-output can not produce the CP pulse, if after this △ UP1＜U subtracts, b=1 then, f=0, e=1, the output of door 1 produces single impulse CP equally, through IC6 counting Q1Q
0Become 10, this moment, the A tester in power-down state was shut down, and the B machine continues converting operation, has reached the purpose that subtracts platform automatically, this moment f=0, CP pulse impassabitity door V then can not produce variable-frequency governor and force back zero-signal.The circuit of this programme (9) is the RC time delay circuit, when compressor transfers power frequency operation to by frequency conversion, if insert electrical network immediately, Lenz's electromotive force that motor remanent magnetism causes does not disappear as yet, will cause stack with the electrical network sinusoidal voltage, peak voltage can reach 1300 volts under the extreme case, to cause very big rush of current, if it is very nearly the same again with direct hard reboot to insert evening, so the way of taking suitable time-delay will help the elimination of above-mentioned phenomenon, 12-37KW compressor that this cabinet is controlled, transferring power frequency operation delayed command in-service time to by frequency conversion is 0.23～0.37 second, postpones 1 second and insert frequency conversion instruction in-service time.
When circuit (10) (11) (12) is used for the variable-frequency governor et out of order, make natural fuels reclaim unlikely interruption, to protect petrol storage tank safety.As shown in Figure 6 on the U＞UP1＞U under normal barometric pressure or the last air pressure of UP1＞U exceed just often, the F point is high potential, then red light is bright through phase inverter, and relay J J adhesive is when the variable-frequency governor et out of order, the contact KGZ that warns engages, intermediate relay JS adhesive and self-insurance, the normally closed contact of JS disconnect master control contactless switch CJ0, CJ1, and the variable-frequency governor of fault breaks away from electrical network, JS-3 makes and carries out relay FX connection simultaneously, and FX-3 makes the JS of slug relay
oAdhesive, emergency service contactless switch CJ4 connects subsequently, makes the compressor work that directly is connected to the grid, and when UP1＜U was last, the F point was an active potential, and relay J J cuts off the power supply; Green light is bright, and the compressor of emergency starting is out of service, and this cabinet can make the natural fuels recovery system normally move repeatedly thus, until trouble removal.
Each circuit shown in the accompanying drawing 7, for the natural fuels that pressurizes covers into jar control circuit and security alarm circuit, IC17, IC15 has set U respectively and has opened and U pass reference voltage, show big jar of air pressure when UP2＜U game clock and be lower than normal value, aforementioned subtract the platform circuit conditioning in, the Q end of circuit (14) is high level, analog switch is logical, 12V voltage transfers valve opening potential device W to be set from this cabinet output 1-5V voltage through electricity, transfer valve (22) to open through U/I circuit and double beat magnetic amplifier (21) control electricity, realize that natural fuels covers into jar, thereby make big jar of air pressure reply normal value rapidly, otherwise be UP2＞U when closing, it is closed condition that electricity is transferred valve.IC14, the IC15 of newspaper well circuit (16) have set and have opened U with U and close corresponding reference voltage U lower limit, the U upper limit, when driving valve and closing valve control, the i point of circuit (16) is a high potential, transistor BG1 conducting, and buzzer phone and LED4 Red LED1 are warned simultaneously.
The utlity model has following advantage:
1. make permanent safe atmospheric pressure value, automaticity height, the safety and stability of keeping of big pot of oil storage Reliably;
2. natural gas can all reclaim, and the change pollution sources are the energy, remarkable in economical benefits;
3. can be widely used in oil field enclosed formula big pot of oil storage tank deck natural gas, refinery processes tail In gas and the gasoline tank tank deck vaporizing oil-gas condensate recovery system.
Claims (2)
1. multifunctional oil gas reclaims the minute-pressure control housing, form by cabinet, constant voltage power suspply (17), U/I translation circuit (2), read-only memory (7), guard grating circuit (15), it is characterized in that: by the current value of the expression tank deck air pressure of differential pressure transmitter (18) output, through sampling resistor R
1, R
2Be converted to correspondent voltage value UP1, UP2, deliver to separate central control unit and electricity accent valve control respectively, in the central control unit, the magnitude of voltage UP1 of expression tank deck air pressure and reference voltage U0 relatively after, be converted to current signal and on-off signal, control compressor rotary speed respectively and add and subtract compression board number automatically, magnitude of voltage UP1 also with the U that sets on, U down relatively, when governor sends breakdown signal, its difference control compressor start and stop, the magnitude of voltage UP2 of same expression tank deck air pressure transfers in the valve control at electricity and opens the folding that comparison automatic guidance electricity is transferred valve with U pass of setting and U, and central control unit is made up of following circuit:
Pressure is set relatively amplifying circuit (1)---set the reference voltage U of the constant safe pressure of expression tank deck
o, with itself and UP1 relatively, difference amplify △ UP1;
U/I translation circuit (2)---△ UP1 is transformed to the electric current that changes in linear 4-20mA scope exports variable-frequency governor (19) to from this cabinet;
Two limit comparator circuit I (3)---the limit threshold voltage of △ UP1 with plus-minus compressor operating platform number: U is added U subtract and compare;
Plus-minus compressor operating platform is counted logic control circuit (4)---and when △ UP1＞U adds, and each compressor is when being non-power frequency operation, perhaps subtract as △ UP1＜U, and certain compressor is when being in power frequency operation this circuit output single impulse CP;
Compressor cycle starts gating circuit (5)---with the CP step-by-step counting of circuit (3), as the circulation address code of read-only memory;
Reserve machine displacement gating circuit (6)---switch is set the reserve machine status code, and button is inserted latch, forms the read-only memory address code with the circulation address sign indicating number of circuit (5);
Read-only memory circuit (7)---writes---power frequency---frequency conversion mode of operation and the standby instruction that circulates and switch successively by frequency conversion of each compressor;
Variable-frequency governor is forced back null circuit (8)---and when △ UP1＞U adds, and during the non-power frequency operation of each compressor, this circuit is the CP pulse delay, makes the relay J R adhesive of this circuit and keeps 1.7 seconds, and JR connects the null circuit that returns of variable-frequency governor;
Compressor soft start time delay circuit (9)---the power frequency operation and the converting operation command signal of circuit (7) output were delayed time respectively 0.23-0.37 second and 1 second, export the execution unit of compressor set (20) from this cabinet to;
Two limit comparator circuit II (10)---the stop voltage U that expression tank deck air pressure safe range is set for emergency operating go up and U under, and compare with UP1;
The output signal of emergent start and stop compressor Control Cprant (11)---circuit (10) act on bistable circuit as UP1＞U on the last or U＞UP1＞U following time, the control relay JJ adhesive of this circuit;
Emergency starting executive circuit (12)---carry out relay FX and control jointly by the control relay JJ of circuit (11) and the intermediate relay JS of this circuit, JS is when the variable-frequency governor fault is warned contact closure and adhesive, when relay FX adhesive, with cutting off being connected of variable-frequency governor and electrical network, the compressor of converting operation directly is connected with electrical network;
The electric valve control of transferring is made up of following circuit: two limit comparator circuit III (13)---setting represents that the upper and lower limit voltage of tank deck pressure security scope is that electric reference voltage U pass and the U that transfers valve pass valve to limit and open valve to limit opens, and compares with UP2;
Analog switch control circuit (14)---when UP2＞U opens, the analog switch CD4066 of circuit (14) opens, and its output voltage is adjusted potential device W to U/I translation circuit through aperture becomes 4-20mA linear current from the output of this cabinet, and when UP2＞U closes, analog switch is disconnected.
2. control housing as claimed in claim 1 is characterized in that: electricity transfers valve control also to be provided with sound light alarming circuit (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95216036 CN2230301Y (en) | 1995-07-11 | 1995-07-11 | Multi-function micro-pressure control cabinet for recovering oil and gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95216036 CN2230301Y (en) | 1995-07-11 | 1995-07-11 | Multi-function micro-pressure control cabinet for recovering oil and gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2230301Y true CN2230301Y (en) | 1996-07-03 |
Family
ID=33865224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95216036 Expired - Fee Related CN2230301Y (en) | 1995-07-11 | 1995-07-11 | Multi-function micro-pressure control cabinet for recovering oil and gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2230301Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328132C (en) * | 2002-09-09 | 2007-07-25 | 特拉华资本形成公司 | Pot pressure regulator system |
| CN104477537A (en) * | 2014-11-07 | 2015-04-01 | 安徽泰合森能源科技有限责任公司 | Tank body pressure stabilizing device |
-
1995
- 1995-07-11 CN CN 95216036 patent/CN2230301Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328132C (en) * | 2002-09-09 | 2007-07-25 | 特拉华资本形成公司 | Pot pressure regulator system |
| CN104477537A (en) * | 2014-11-07 | 2015-04-01 | 安徽泰合森能源科技有限责任公司 | Tank body pressure stabilizing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2230301Y (en) | Multi-function micro-pressure control cabinet for recovering oil and gas | |
| CN206884948U (en) | A kind of anti-throw load device and a kind of school bus | |
| CN219513807U (en) | High-voltage control box | |
| CN2329774Y (en) | Over-speed prevention protection controller for diesel engine of diesel locomotive | |
| CN2893166Y (en) | Engine trouble protector | |
| CN114268165A (en) | Automatic switching mode of online low-voltage frequency converter | |
| CN2410421Y (en) | Switching device for main oil pump of steam turbine | |
| CN2237731Y (en) | automatic control and protection module circuit of starter | |
| CN208966485U (en) | A kind of sanitation cart exhaust air energy recovery control device and sanitation cart | |
| CN2396544Y (en) | Flame-proof type special multifunctional vacuum electromagnetic starter for driving of mine | |
| CN207111297U (en) | Machine unit speed regulating device scene fuel injection pressure signal monitoring system | |
| CN220487753U (en) | Engine one-key electric starting control device | |
| CN2057430U (en) | Auto-controlled water pump for rural household running water | |
| CN218998523U (en) | Grid-connected control cabinet | |
| CN201018315Y (en) | Generating set auto-switch and electronic speed controller | |
| CN2328045Y (en) | High voltage reactive compensation intellectual device | |
| CN2135168Y (en) | Explosion-proof mine automatic manostat | |
| CN208241394U (en) | It is a kind of to utilize new energy for curved-surface building photovoltaic generating system | |
| CN2339761Y (en) | Electric-controlled extinction device of diesel engine | |
| CN213116536U (en) | Power-loss shutdown control device for speed regulator of water turbine | |
| CN2311791Y (en) | Electronic water level controller | |
| CN2474738Y (en) | Diesel oil engine flame out device of vehicle | |
| CN202091168U (en) | Control circuit controlling operation of oil pump by neutral point voltage of generator | |
| CN2288244Y (en) | Anti-theft alarm for domestic door lock | |
| CN2262296Y (en) | Single phase pulse leakage protector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |