CN205579167U - Take liquid ammonia pipeline leakage detection system of coating based on forced induction - Google Patents
Take liquid ammonia pipeline leakage detection system of coating based on forced induction Download PDFInfo
- Publication number
- CN205579167U CN205579167U CN201620355401.3U CN201620355401U CN205579167U CN 205579167 U CN205579167 U CN 205579167U CN 201620355401 U CN201620355401 U CN 201620355401U CN 205579167 U CN205579167 U CN 205579167U
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- electromagnetic valve
- ammonia pipeline
- pressure
- liquefied ammonia
- clad
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Abstract
The utility model discloses a take liquid ammonia pipeline leakage detection system of coating based on forced induction. Including coating device, pressure sensors, cable, liquid ammonia pipeline and data process system, coating device parcel is peripheral at the liquid ammonia pipeline, is equipped with independent airtight gas chamber in the coating device, and installation pressure sensors in the airtight gas chamber sends when revealing when the pipeline somewhere, and pressure sensors detects signal transmission and for data process system, is sent the position of revealing by data process system analysis. This system still is equipped with the self -checking unit for detect line fault, support system's normal operating. The utility model discloses the electrical circuitry of work is simple and easy, and the circuit is in switching -off state when not taking place to leak, has improved system security nature. Can record two valid data of sub -thread cable length and pressure sensors resistance card resistance when leaking simultaneously, can utilize and handle the pipeline that just can monitor long distance liquid ammonia to less inductor serial number.
Description
Technical field
This utility model relates to liquefied ammonia pipeline leakage testing research field, particularly to a kind of based on pressure sensitive
The liquefied ammonia pipeline leakage checking system of band clad in the case of unconventional.
Background technology
In recent years, along with the fast development of Chinese society economy, freezer is as storing food and some specialities
Instrument be widely used in people's daily life.Ammonia (is compiled as a kind of cold-producing medium of cold storage refrigerating system
Number R717), its macroscopic property is optimal in ownership cryogen, is the currently used middle temperature of widest one
Middle compression refrigerant.In the large and medium-sized cold storage refrigerating system of China, ammonia is used to account for more than 80% as cold-producing medium.
Measuring gas parameter based on pressure sensitive is a kind of safe and efficient measurement technology.It is according to other physical
Property list reveals different metering systems.But it is when working environment is the liquefied ammonia pipeline with clad, traditional
Pressure detecting just faces a more pickle.By to the detection design of circuit and changing of pressure inductor
Enter, rely on computer technology, overcome the difficult problem causing conventional pressure induction instrument aratus to measure, the most permissible
Complete the monitoring in real time in the case of the liquefied ammonia pressure pipeline of band clad leaks and location.
Summary of the invention
This utility model is for the deficiencies in the prior art, it is proposed that the liquid of a kind of band clad based on pressure sensitive
The system of ammonia pipeline leakage testing.
The liquefied ammonia pipeline leakage checking system of a kind of band clad based on pressure sensitive includes clad device, pressure
Power induction apparatus, cable, liquefied ammonia pipeline and data processing system；
It is peripheral that described clad device is wrapped in liquefied ammonia pipeline, clad device include clad, insulating element,
Supporting member, insulating element is arranged between clad and liquefied ammonia pipeline, by between clad and liquefied ammonia pipeline
Space is divided into mutually isolated sealed gas chamber, is provided with gas in ensureing sealed gas chamber between insulating element
Free-pouring supporting member；
Described cable include several first electromagnetic valves, the resistance being connected with the first electromagnetic valve, connecting line, with
And the control switch being connected with pressure inductor；The first described electromagnetic valve is controlled by data handling system；
One pressure transducer and control switch one the pressure inductor unit of composition being connected with this sensor, one
Individual first electromagnetic valve and coupled resistance constitute a self-test unit, are provided with one in each sealed gas chamber
Individual pressure inductor unit and a self-test unit,
Described data handling system includes pc mechanical, electrical stream table, regulated power supply, the second electromagnetic valve, the 3rd electricity
Magnet valve；
Described all pressure sensor unit are connected in parallel, the pressure sensor unit after being connected in parallel and electric current
Table, regulated power supply, the 3rd electromagnetic valve are connected into loop；The described self-test unit in same sealed gas chamber
Being connected in parallel with pressure inductor unit, one end of the second described electromagnetic valve is connected with regulated power supply, the other end
Switch with the control of all of pressure sensor unit respectively and the first electromagnetic valve is connected；
Described pc machine and ammeter, regulated power supply, the second electromagnetic valve, the 3rd electromagnetic valve and all of first
Electromagnetic valve is connected.
Preferably, described pressure inductor includes shell., sheet rubber., resistor disc., electric wire. and two metals
Sheet, described electric wire. with shell. being in close contact, be divided into two strands, two strands are connected with two sheet metals respectively,
Described sheet rubber. with shell. seamless contact, and make the gas having certain air pressure inside induction apparatus.Sheet rubber.
Inner side and resistor disc. it is in close contact, sheet rubber. outside is exposed in sealed gas chamber, hinders sheet. and set between sheet metal
There is distance.
Preferably, the described resistor disc in different pressure inductor unit. resistance different, described
Resistance in different self-test unit is different.
Preferably, described connecting line is triple core wire, the first electromagnetic valve. there are two lugs on cable
Zero line is connected with live wire.
Preferably, described electric wire. two strands of a strand and connecting line be connected, electric wire. another strand and company
Remaining one of wiring is connected.
Described shell incombustible material is made, and is hollow structure in the middle of shell, shell upper ledge
With electric wire seamless link, enclosure is stretched out a part, is made electric wire be deep into inside；
Described sheet rubber and enclosure tight bond, and enclosure is isolated the gas containing certain air pressure
Body, with resistor disc compact siro spinning technology inside sheet rubber；
Described regulated power supply provides stable voltage for whole observation circuit；
The second described electromagnetic valve accepts the signal that computer system sends when circuit pathways, makes valve close and is
Second group of data of systematic survey provide safeguard；
Twice size of current by circuit measured by described ammeter when circuit pathways, divides for computer system
Analysis leakage situation provides foundation；
Described computer system receives the data added up by ammeter, and according to the calculation procedure meter set
Calculate the pressure inductor model and position having an effect, give a warning to staff simultaneously.
This utility model has the advantage that relative to prior art
(1) this utility model is isolated the independent closed cavity that clad formed at liquefied ammonia pipeline external permissible
Play and strengthen heat insulation effect.
(2) pressure inductor of invention in this utility model, the end induction apparatus as monitoring system has system
Work is simple, it is sensitive to reflect, resistance characteristic is different, it is simple to make the pressure inductor of different model.
(3) circuit theory of utility model works is simple, and when there is not leakage, circuit is in off state,
Improve the safety of system.Sub-thread length of cable and the resistance of pressure inductor resistor disc can be recorded during leakage simultaneously
It is worth two valid data, it is possible to use less induction apparatus numbering just can be monitored the pipeline of distance liquefied ammonia.
(4) this utility model utilizes computer system, it is possible to achieve to generating date and warning in time,
And it is easy to the statistical work of liquefied ammonia pipeline leakage situation data.
(5) the practical general cable of this utility model is as signal transmssion line, arranges detection cable at cable simultaneously
Unabroken equipment is had to can ensure that monitoring effect, it is simple to daily maintenance work.
Accompanying drawing explanation
Fig. 1 is this utility model one liquefied ammonia pipeline leakage checking system schematic diagram；
Fig. 2 is operation principle circuit diagram in this utility model；
Fig. 3 is pressure inductor structural representation in this utility model；
Fig. 4 is that in this utility model, schematic diagram arranged by liquefied ammonia pipeline leakage testing element
Fig. 5 is flow chart of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is further illustrated.
The liquefied ammonia pipeline leakage checking system bag of band clad based on pressure sensitive as of the present utility model in Fig. 1-4
Include and include clad device 1, pressure inductor 2, cable 3, liquefied ammonia pipeline 4 and data handling system 5；
It is peripheral that described clad device 1 is wrapped in liquefied ammonia pipeline 4, clad device 1 include clad 1.1,
Insulating element 1.2, supporting member 1.3, insulating element 1.2 is arranged between clad 1.1 and liquefied ammonia pipeline 4,
Space between clad 1.1 and liquefied ammonia pipeline 4 is divided into mutually isolated sealed gas chamber, insulating element 1.2
Between the supporting member 1.3 of free flow of gas in ensureing sealed gas chamber is installed；
Described cable 3 includes several first electromagnetic valves 3.1, the resistance being connected with the first electromagnetic valve 3.1, company
Wiring and the control switch being connected with pressure inductor 2；The first described electromagnetic valve 3.1 is processed by data
The control of system 5；
One pressure transducer and control switch one the pressure inductor unit of composition being connected with this sensor, one
Individual first electromagnetic valve 3.1 and coupled resistance are installed in constituting a self-test unit, each sealed gas chamber
There are a pressure inductor unit and a self-test unit,
Described data handling system 5 includes pc machine 5.1, ammeter 5.2, regulated power supply the 5.3, second electromagnetism
Valve the 5.4, the 3rd electromagnetic valve 5.5；
Described all pressure sensor unit are connected in parallel, the pressure sensor unit after being connected in parallel and electric current
Table 5.2, regulated power supply the 5.3, the 3rd electromagnetic valve 5.5 are connected into loop；In described same sealed gas chamber
Self-test unit is connected in parallel with pressure inductor unit, one end of the second described electromagnetic valve 5.4 and regulated power supply
5.3 are connected, and the other end switchs with the control of all of pressure sensor unit respectively and the first electromagnetic valve 3.1 is connected；
Described pc machine 5.1 and ammeter 5.2, regulated power supply the 5.3, second electromagnetic valve the 5.4, the 3rd electromagnetic valve
5.5 are connected with all of first electromagnetic valve 3.1.
Preferably, described pressure inductor 2 includes shell 2.1, sheet rubber 2.2, resistor disc 2.3, electric wire
2.4 and two sheet metals, described electric wire 2.4 is in close contact with shell 2.1, is divided into two strands, two strands to divide
Not being connected with two sheet metals, described sheet rubber 2.2 is seamless with shell 2.1 to be contacted, and makes inside induction apparatus
There is the gas of certain air pressure.It is in close contact with resistor disc 2.3 inside sheet rubber 2.2, sudden and violent outside sheet rubber 2.2
It is exposed in sealed gas chamber, between resistance sheet 2.3 and sheet metal, is provided with distance.
Preferably, the resistance of the described resistor disc 2.3 in different pressure inductor unit is different, institute
Resistance in the different self-test unit stated is different.
Preferably, described connecting line is triple core wire, and the first electromagnetic valve 3.1 has two lugs respectively at cable
Zero line on 3 is connected with live wire.
Preferably, a strand of described electric wire 2.4 is connected with two strands of connecting line, another stock of electric wire 2.4
One remaining with connecting line of line is connected.
Described pc machine 5.1 can count with ammeter the 5.2, second electromagnetic valve 5.4 and the 3rd electromagnetic valve 5.5
According to uploading and instruction issues.
Described ammeter 5.2 is positioned on the main line of circuit, can record the size of electric current in circuit.
Described regulated power supply 5.3 can be that whole monitoring system provides stable voltage.
The second described electromagnetic valve 5.4 and the 3rd electromagnetic valve 5.5 complete residing circuit according to the instruction of pc machine and open
Road, tripping action.
As it is shown in figure 5, the liquefied ammonia pipeline leakage checking system of the band clad of a kind of pressure sensitive, specific works
Principle comprises the following steps:
After step 1, liquefied ammonia pipeline leak, the liquefied ammonia of internal high pressure can discharge from leakage point rapidly and gasify
Each pressure within independent sealed gas chamber is caused to rise；
Step 2, pressure inductor are under the effect of gases at high pressure, and sheet rubber produces deformation band and moves resistor disc gradually
Rise until contacting with the sheet metal on top, i.e. the switch of control in pressure sensor unit Guan Bi, so that
The circuit ON path of this pressure inductor place pressure inductor unit, with the first pressure inductor unit conducting
As a example by, i.e. " regulated power supply-ammeter the-the three electromagnetic valves-resistor disc 1-controls switch 1-regulated power supply " circuit
Connecting path, in pressure inductor, the distance between resistor disc and sheet metal can be carried out according to method calculated as below
Determine:
In formula: the distance between h-pressure inductor resistor disc and sheet metal；
The area of S-pressure inductor sheet rubber；
The change value of pressure of Δ P-pressure inductor work；
P0The force value that-pressure inductor is initial；
The amount of gaseous matter in n-pressure transducer；
K-correction factor；
R-gas constant；
T-absolute temperature；
Step 3, under the effect of regulated power supply, the resistor disc within pressure inductor can make circuit produce specific
Current value I1, current value I1Recorded and be sent to pc machine by ammeter, then pc machine controls the second electromagnetic valve
Work so that connecting line between regulated power supply with pressure inductor in parallel upper one just as connecting line, due to
There is internal resistance in connecting line so that in circuit, electric current sends change, produces current value I2, current value I2By ammeter
Record and be sent to pc machine；
Step 4, different current values are collected by pc machine, and calculate pressure biography in circuit according to the size of electric current
The mounting distance L of sensor and resistance R of induction apparatus resistor disci, owing to each pressure transducer processes system with data
Length of cable between system (5) is different, and the resistance of each pressure transducer is the most bitterly, may thereby determine that and sends out
The position of the raw pressure inductor revealing sealed gas chamber, and monitoring personnel are given a warning, by reasoning abbreviation its
Computational methods are:
In formula: RiThe resistance value of-pressure inductor resistor disc, i takes 1,2....n；
The voltage of U-regulated power supply；
I1-electromagnetic valve do not work before the current value that passes through of circuit；
I2The current value that after-electromagnetic valve work, circuit passes through；
The mounting distance L of pressure transducer in L-operating circuit；
The sectional area of S-cable；
The resistivity of ρ-cable；
Step 5, as current value I1And I2When being uploaded to pc machine, pc machine is to the 3rd electromagnetism being positioned at circuit main line
Valve sends instruction, the 3rd electromagnetic valve disconnecting circuit, after making system be in no power state thus ensureing and leak
Accident potential will not be produced, after technical staff repairs liquefied ammonia pipeline, by pc machine, the 3rd electromagnetic valve is recovered
To original state；
The first electromagnetic valve that step 6, computer are pointed on clad inside cable sends instruction, allows all
One electromagnetic valve gradually works from proximal and distal, checks the integrity of circuit, and after confirming that circuit is intact, system is located again
In detection state.
Claims (5)
1. the liquefied ammonia pipeline leakage checking system of a band clad based on pressure sensitive, it is characterised in that include clad device (1), pressure inductor (2), cable (3), liquefied ammonia pipeline (4) and data handling system (5)；
It is peripheral that described clad device (1) is wrapped in liquefied ammonia pipeline (4), clad device (1) includes clad (1.1), insulating element (1.2), supporting member (1.3), insulating element (1.2) is arranged between clad (1.1) and liquefied ammonia pipeline (4), space between clad (1.1) and liquefied ammonia pipeline (4) is divided into mutually isolated sealed gas chamber, the supporting member (1.3) of free flow of gas in ensureing sealed gas chamber is installed between insulating element (1.2)；
Described cable (3) includes resistance that several first electromagnetic valves (3.1) are connected, connecting line and the control switch being connected with pressure inductor (2) with the first electromagnetic valve (3.1)；Described the first electromagnetic valve (3.1) is by the control of data handling system (5)；
One pressure transducer and the control switch being connected with this sensor constitute a pressure inductor unit, one the first electromagnetic valve (3.1) and coupled resistance constitute a self-test unit, one pressure inductor unit and a self-test unit are installed in each sealed gas chamber
Described data handling system (5) includes pc machine (5.1), ammeter (5.2), regulated power supply (5.3), the second electromagnetic valve (5.4), the 3rd electromagnetic valve (5.5)；
Described all pressure sensor unit are connected in parallel, and the pressure sensor unit after being connected in parallel and ammeter (5.2), regulated power supply (5.3), the 3rd electromagnetic valve (5.5) are connected into loop；The described self-test unit in same sealed gas chamber is connected in parallel with pressure inductor unit, one end of described the second electromagnetic valve (5.4) is connected with regulated power supply (5.3), and the other end switchs with the control of all of pressure sensor unit respectively and the first electromagnetic valve (3.1) is connected；
Described pc machine (5.1) is connected with ammeter (5.2), regulated power supply (5.3), the second electromagnetic valve (5.4), the 3rd electromagnetic valve (5.5) and all of first electromagnetic valve (3.1).
The liquefied ammonia pipeline leakage checking system of band clad based on pressure sensitive the most according to claim 1, it is characterized in that described pressure inductor (2) includes shell (2.1), sheet rubber (2.2), resistor disc (2.3), electric wire (2.4) and two sheet metals, described electric wire (2.4) is in close contact with shell (2.1), it is divided into two strands, two strands are connected with two sheet metals respectively, described sheet rubber (2.2) is seamless with shell (2.1) to be contacted, and makes the gas having certain air pressure inside induction apparatus；Sheet rubber (2.2) inner side is in close contact with resistor disc (2.3), and sheet rubber (2.2) outside is exposed in sealed gas chamber, is provided with distance between resistance sheet (2.3) and sheet metal.
The liquefied ammonia pipeline leakage checking system of band clad based on pressure sensitive the most according to claim 1, it is characterized in that the resistance of resistor disc (2.3) in described different pressure inductor unit is different, the described resistance in different self-test unit is different.
The liquefied ammonia pipeline leakage checking system of band clad based on pressure sensitive the most according to claim 1, it is characterized in that described connecting line is triple core wire, the first electromagnetic valve (3.1) has two lugs zero line on cable (3) to be connected with live wire.
The liquefied ammonia pipeline leakage checking system of band clad based on pressure sensitive the most according to claim 2, it is characterized in that a described strand of electric wire (2.4) is connected with two strands of connecting line, one remaining with connecting line of another strand of electric wire (2.4) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620355401.3U CN205579167U (en) | 2016-04-22 | 2016-04-22 | Take liquid ammonia pipeline leakage detection system of coating based on forced induction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620355401.3U CN205579167U (en) | 2016-04-22 | 2016-04-22 | Take liquid ammonia pipeline leakage detection system of coating based on forced induction |
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| Publication Number | Publication Date |
|---|---|
| CN205579167U true CN205579167U (en) | 2016-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620355401.3U Withdrawn - After Issue CN205579167U (en) | 2016-04-22 | 2016-04-22 | Take liquid ammonia pipeline leakage detection system of coating based on forced induction |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736953A (en) * | 2016-04-22 | 2016-07-06 | 中国计量大学 | Pressure sensing based liquid ammonia pipeline leak detection system with cladding layer and detection method |
-
2016
- 2016-04-22 CN CN201620355401.3U patent/CN205579167U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105736953A (en) * | 2016-04-22 | 2016-07-06 | 中国计量大学 | Pressure sensing based liquid ammonia pipeline leak detection system with cladding layer and detection method |
| CN105736953B (en) * | 2016-04-22 | 2017-10-10 | 中国计量大学 | A kind of the liquefied ammonia pipeline leakage checking system with clad and its method based on pressure sensitive |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160914 Effective date of abandoning: 20171010 |
|
| AV01 | Patent right actively abandoned |