CN100353106C - Safety valve with on-line detection function and detection system therefor - Google Patents
Safety valve with on-line detection function and detection system therefor Download PDFInfo
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- CN100353106C CN100353106C CNB2005100331240A CN200510033124A CN100353106C CN 100353106 C CN100353106 C CN 100353106C CN B2005100331240 A CNB2005100331240 A CN B2005100331240A CN 200510033124 A CN200510033124 A CN 200510033124A CN 100353106 C CN100353106 C CN 100353106C
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Abstract
The present invention provides a safety valve having the on-line detecting function, which comprises an upper valve body, a lower valve body, a valve seat and a valve clack assembly, wherein the upper and the lower valve body are in detachable and fixedly connected structure. The valve seat and the valve clack assembly are positioned in a space formed from the upper valve body and the lower valve body. The valve clack assembly comprises a sealing clack, a valve rod, a spring, an upper compression ring and a lower compression ring. The inside of the safety valve also comprises a sensor which is positioned on the valve clack assembly. In the present invention, a sensing element which is suitable for the internal configuration and the characteristics of the motion and the deformation of the safety valve are designed and arranged on an internal constructional element to be integrated with the safety valve or to directly become an internal detecting element for providing a state change parameter of an object to be detected, or an operating constructional element of the safety valve becomes a monitoring element simultaneously. Accordingly, the in-line detection and the fault diagnosis of the safety valve can be really realized. The present invention has the advantages of high precision, convenient operation, the obvious safety improvement of the use of various pressure devices, the reduction of detection difficulty and monitoring difficulty, cost reduction and good market prospect.
Description
Technical field
The present invention relates to a kind of safety installation, particularly a kind of safety valve and detection system thereof with online measuring ability.
Background technique
Safety valve is a most widely used safety device in pressurized container, boiler and the pipe safety device.When pressurized container medium pressure raises above specified value for a certain reason, be affected by a pressure medium the active force of power on the safety valve internals flap greater than valve inner spring or the generation of other members, valve is opened automatically, thereby can the discharge pressure medium, further raise to prevent pressurized container, boiler or manifold pressure; When pressurized container medium pressure was reduced to certain value owing to the discharging of safety valve, the active force that safety valve inner spring or other members produce was during greater than the active force of pressure medium, and safety valve cuts out again automatically, stops medium to continue discharging.The safety valve that is installed on the equipment needs regularly to detect to guarantee its proper functioning, the safety valve of existing general type need be pulled down from equipment when detecting, detect leaving on the test stand of production line then, troublesome poeration not only, process is miscellaneous, and need stop the operation of relevant device, thereby influences ordinary production, for the appliance arrangement that needs the continous-stable operation, this detection mode is difficult to use more.In order to overcome this problem, the online measuring technique that needs the development safety valve, existing a kind of online measuring technique is that safety valve is following in working order, use the outside hydraulic driving additional device of installing, provide the additional external force that promotes to valve rod, make safety valve be issued to the opening state of artificial leakage, come the cracking pressure of computationally secure valve by calculating additional force and interior pressure and sealing area, thereby whether the impacting force of judging spring meets the demands in the effect of interior pressure and additional force; This technology manual operation factor is very big to the testing result influence, because hydraulic system needs manual operation, and the safety valve opening time is very short, add the power of recommending and be difficult to accurate control, excessive phenomenon often appears opening in the operation, the precision that influence detects, in addition in practical operation, the state that safety valve has just reached unlatching often is difficult to accurately determine, the method of often using during operation is the rising by the perusal valve rod, or listen the drainage sound of medium to determine whether safety valve is opened, can produce bigger detection error like this.Akin with aforementioned techniques is that number of patent application is 02144602.4 Chinese invention patent disclosed a kind of " safety valve with online measuring ability ", what this safety valve was different with aforementioned techniques is to be provided with the hydraulic seal structure between flap and valve rod, formation has the micro hydraulic cylinder of bilateral sealing, when detecting, directly pressurizing medium is fed and make safety valve reach the opening state of artificial leakage in this micro hydraulic cylinder, thereby detect the cracking pressure of safety valve; Though this safety valve has structurally been done certain improvement with respect to general safety valve, still need to add hydraulic loaded mechanism, need the open degree of artificial judgment safety valve equally, thereby its detection error is also bigger.Number of patent application is that 99805355.4 Chinese invention patent discloses a kind of " pressure relief valve monitoring device ", this supervisory device comprises the sensor load module of contiguous safety valve setting and the position transducer that is attached thereto, pressure transducer, leak sensor, described position transducer is installed in pressure regulator valve rod top, is used to measure the position of flap with respect to valve seat; Described pressure transducer is installed in the entrance and exit of safety valve, is used to measure the inlet of safety valve and the pressure in outlet port; Described leak sensor is near safety valve and near the nozzle setting, detect the escape of liquid between nozzle and the shut-off block, this supervisory device has been done change to the structure of safety valve, can realize certain online measuring ability, but also have shortcoming and deficiency: (1) is because actual safety valve top is dismountable (generally being flange bolt structure or worm structure), therefore for different big or small safety valves, under the valve rod closed state, displacement transducer certainly will have initial displacement, could guarantee to detect, can cause each safety valve installing/dismounting process loaded down with trivial details like this, the initial displacement parameter that detects is inconsistent; In addition, the purpose that displacement transducer is set is to detect flap to occur breaking away from (separation) with valve seat, but the common displacement transducer of installing at normal temperatures, in operation, occur in the absence of flap and valve seat relative displacement, because operating temperature raises or reduces, cold and hot distortion (stretching) also appears in valve rod, and this distortion that does not reflect that flap separates that can occur under high temperature or low temperature causes error in judgement easily; In addition, the displacement transducer of rheostatic type because the reason of contact friction, wearing and tearing can cause bad connection or coil short, causes detecting error and strengthens after long-term the use.(2) the pressure transducer purpose of detection safety valve fluid input and outlet pressure is to calculate leakage rate, because this patent is the while detected temperatures not, therefore, the thermophysical property parameter of fluid under the micro-leakage state can't be learnt, the leakage rate of calculating can not be realistic, because the working fluid of safety valve is the saturated liquids of compressible gas or volatile flash distillation normally, their physical-property parameter is relevant with the following local temperature and pressure of escape of liquid state, and it is different with the physical-property parameter under the container body district temperature, have only to measure temperature simultaneously, can from the physical property of fluid database, accurately find the physical-property parameter of calculated flow rate.The noise that occurs when (3) leak sensor utilizes the valve port escape of liquid detects and judges leakage, the subject matter of this detection mode is that sharp-pointed noise of randomness and the fluid that surrounding environment occurs belongs to character of the same race fully by the noise that valve port produces leakage, the possibility sound pressure level is also high a lot of simultaneously, therefore, detected here noise is likely other local appearance, because sound source is numerous, the noise that minute leakage produces is difficult to accurate detection, is difficult in the production scene implement satisfactorily so the detection mode that produces noise is leaked in this utilization.In addition, this safety valve monitoring technique function is imperfection still, and some important information that especially can not react safety valve is as variation of: the variation of cracking pressure, spring performance (for example impacting force, seal pressure) etc.
Summary of the invention
The objective of the invention is to overcome the shortcoming that existing safety valve detection technique exists, provide a kind of simple and reasonable for structure, it is little to detect error, precision height, the safe and reliable safety valve of realizing online measuring ability.
Another object of the present invention is to provide a kind of to above-mentioned detection system with safe monitoring valves of online measuring ability.
Purpose of the present invention is achieved through the following technical solutions: the safety valve that originally has online measuring ability comprises upper valve body, following valve body, valve seat, flap assembly, upper valve body is dismountable fixed connection structure with following valve body, valve seat and flap assembly are positioned at the space that upper valve body and following valve body form, and described flap assembly comprises sealing lobe, valve rod, spring, goes up hold-down ring, following hold-down ring; It is characterized in that: the safety valve also includes sensor, and described sensor is arranged on the flap assembly and by connecting line and is connected to outside the safety valve.
The end that the sealing lobe of described flap assembly is connected with erection unit is provided with shrinkage pool, and the opening of shrinkage pool is provided with pressure containing disk, and sensor is arranged in the shrinkage pool or on the pressure containing disk, and is connected to outside the safety valve by the signaling line that is arranged at the shrinkage pool wall.
Described shrinkage pool can be various shape, as axisymmetric shape (hemisphere, frustoconic shape, taper shape, ladder are cylindrical, ladder frustoconic shape, round platform and cylinder combination shape etc.) or non-axisymmetric shape (square, elliptical cylinder-shape etc.).
The concrete form that described sensor is arranged at shrinkage pool is: sensor is arranged in shrinkage pool top, shrinkage pool wall or shrinkage pool space; The concrete form that described sensor is arranged on the pressure containing disk is: sensor is positioned at the one or both sides of pressure containing disk; Have through hole on the described shrinkage pool wall and be communicated to the sealing lobe outside, the lead that is connected with sensor is connected to outside the sealing lobe by through hole, and further is connected to outside the safety valve; The Placement of described pressure containing disk and sealing lobe for welding, removably connect or the Placement that adopts ready-package and have a sealing configuration is connected.
The described sensor that is arranged in the shrinkage pool comprises resistive transducer, piezoelectric transducer, thermocouple sensor, photoelectric sensor, Hall transducer, inductive pickup, capacitive transducer, fiber optic sensor; Sensors of various types can be fit into as required carries out pressure, temperature, distortion, the isoparametric measurement of displacement in the shrinkage pool.Because the space in the shrinkage pool is less, aforementioned various forms of sensors all need to make with reference to existing larger-size sensor reduce in scale or size design, and its structure and action principle are close with existing sensors.
In order to monitor the various variablees of spring, can spring, valve rod, flap overcoat, on hold-down ring, between hold-down ring or the upper and lower hold-down ring sensor is set down and detects; But installation position displacement sensor on described upward hold-down ring or the following hold-down ring, detection springs breaks down in pretension, proper functioning and superpressure opening process or when spring, as crack, because dielectric corrosion produces the variation of the spring force under the situations such as bearing cross-section reduces; Described displacement transducer can be electromagnetic type, strain type or optical displacement sensor etc.Especially, can between last hold-down ring and gland nut, proving ring be installed, distortion or force transducer (as strain gauge transducer) are set on proving ring, whether be used to detect the pretightening force that applies under the pretension state meets the demands, can also monitor simultaneously the situation that operating spring force changes, for example when spring was subjected to the effect generation cross section attenuate of aggressive medium or local microscopic crack occurs, changing may appear in spring force; Perhaps installing force sensor (as piezoelectric transducer) between following hold-down ring and valve rod support rim is used for the variation of measuring spring power size.
Described spring arranged outside has strain gauge transducer to be used for detection springs power transmission capacity; In order to prevent that strain gauge transducer is subjected to ectocine, can brush coating with sensor protection.
In order to monitor the variation of spring force, also can on the symmetrical position of described valve rod middle part, process the vertical bar-shaped trough or the circumferential groove of symmetry with the mode of removing material, to reduce valve rod rigidity, increase the amount of deformation of valve rod, in vertical bar-shaped trough or sensor (as displacement transducer) is set in the circumferential groove; In order to prevent that displacement transducer is subjected to ectocine, can brush coating and will implement protection sensor.
In order to detect the leakage rate of safety valve in different opening states, drain port inside and outside differential pressure sensor and temperature transducer can be set, both cooperations can calculate the size of leakage rate; Concrete structure can be: survey mouth for two of the pressure difference meter sensor and be arranged at the inner and valve port outside of safety valve runner respectively, the sensor main body part can be arranged at the safety valve outside; Temperature transducer can adopt thermocouple, and it is inner or be arranged on the diaphragm to be placed on the runner of safety valve.
In order to monitor the Lift of sealing lobe, can between sealing lobe and flap overcoat, sensor be set, as photoelectric sensor, electromagnetic sensor, fiber optic sensor etc.; By the relative displacement of precise monitoring sealing lobe and flap overcoat effectively of these sensors, thus the detection of realization flap Lift.
Described safety valve can be Fall lift safety valve or Low lift safety valve or other spring-loaded type safety valves.
A kind of to above-mentioned detection system with safe monitoring valves of online measuring ability, comprise the sensor, the data acquisition process assembly that are arranged on the flap assembly, the data acquisition process assembly is connected with described sensor.
Described data acquisition process assembly is connected to form by signal input module, signal conversion module, A/D modular converter, signal processing module etc.; Wherein, signal input module mainly realizes the extraction of non-electric charge quantity signalling; The signal conversion module realizes functions such as signal amplification, filtration, modulation; The A/D modular converter is mainly realized the digitizing conversion of signal; Signal processing module is finished the further processing to signal, mainly be meant the single-chip microcomputer, palm PC, microcomputer, mainframe computer or other data processing equipments that utilize the band microprocessor, by the language programming technology, the signal that obtains is carried out analyses such as waveform, time domain, frequency domain, the data in real time that perhaps signal processing is obtained shows, writes down, stores, so that obtain the various information about the safety valve running state.
Utilize data acquisition process assembly, corresponding interface and create corresponding Monitoring and Controlling software, data analyzing and processing software, the present invention can realize the remote monitoring and the wireless monitor of networking.
The relative prior art of the present invention has following advantage and effect: (1) the present invention will be adapted to the sensor design arrangement of safety valve internal configuration and motion and deformation characteristics on internals, become one with safety valve, perhaps directly become an inside Detecting element that detected object change of state parameter is provided of safety valve, perhaps the working component with safety valve becomes monitoring element simultaneously, the online detection and the fault diagnosis of safety valve have really been realized, the precision height, easy to operate.(2) can obtain at any time owing to the operating status parameter of safety valve, therefore the safety valve group who is distributed in the device or in the factory can realize concentrating monitoring and unified management, also can carry out special tracking management according to specific safety valve, realization is handled with concrete at the special analysis of particular problem, safety valve to particular importance can be realized special monitoring, safety valve for normal operation can prolong maintenance period, safety valve to long-term proper functioning reduces monitoring rank etc., and sufficient realistic basis is all arranged; Therefore, can sufficiently and reasonably realize reliable operation and the scientific management of the safety valve group in the production system.(3) since safety valve itself integrated the monitoring function element, therefore, the performance variation of safety valve, can judge accurately in conjunction with the history and reality data of safety valve runtime database and the parameter in fault signature Identification Data storehouse, the setting of realization safety valve trouble free service threshold and overload alarm, early warning system are set up, thereby realize checking targetedly and safeguarding, can save a large amount of costs during safety valve was safeguarded in the past, avoid the contingent danger of manual operation, thus more safe and reliable; Simultaneously, because Detecting element and safety valve have a style of one's own, therefore can fully grasp the situation of change of the service behaviour parameter of safety valve, the variation of the safety valve running parameter that can be on purpose reflects at Detecting element, determine whether concrete safety valve needs check, repairs or change, and judgment accuracy is higher.(4) the present invention's diverse in function that can realize, the user is the working state of detection springs or the fault that may occur separately; Also can whether possess enough initial sealing power and working seal power or the spring decrement (displacement) under each state by separately testing process medi-spring; Also can detect the various parameters of safety valve flap drain port separately, parameter values such as local medium temperature, pressure, pressure difference during as leakage; Also can detect the displacement of flap under various states etc.; According to application target, the present invention's use that also multiple measuring ability can be combined detects or monitors a plurality of status parameters simultaneously, realizes that the comprehensive state of safety valve detects the prediction that changes with long-term behaviour.
(5) the present invention can significantly improve the Security that various pressure facilitys use, and reduces the difficulty and the cost that detect monitoring, can overcome effectively that trivial operations, precision that existing safety valve detection technique exists are low, function singleness, to the bigger shortcoming of ordinary production influence; Because it is extremely extensive that safety valve uses, so Applicable scope of the present invention is wider, promotes the use of the present invention and can bring favorable economic benefit.
Description of drawings
Fig. 1 is the structural representation of existing Low lift safety valve.
Fig. 2 is the structural representation that the present invention has the safety valve of online measuring ability.
Fig. 3 is the schematic representation that the present invention has another structure of safety valve of online measuring ability.
Fig. 4 is the schematic representation that the present invention has the another structure of safety valve of online measuring ability.
Fig. 5 is the safety valve schematic representation of a structure again that the present invention has an online measuring ability.
Fig. 6 is the schematic representation that the present invention has the 5th kind of structure of safety valve of online measuring ability.
Fig. 7 is the schematic representation that the present invention has the 6th kind of structure of safety valve of online measuring ability.
Fig. 8 is the schematic representation that the present invention has the 7th kind of structure of safety valve of online measuring ability.
Fig. 9 is the schematic representation that the present invention has the 8th kind of structure of safety valve of online measuring ability.
Figure 10 is the schematic representation that the present invention has the 9th kind of structure of safety valve of online measuring ability.
Figure 11 is the schematic representation that the present invention has the tenth kind of structure of safety valve of online measuring ability.
Figure 12 is the schematic representation that the present invention has the 11 kind of structure of safety valve of online measuring ability.
Figure 13 is the schematic representation that the present invention has the 12 kind of structure of safety valve of online measuring ability.
Figure 14 is the schematic representation that the present invention has the 13 kind of structure of safety valve of online measuring ability.
Figure 15 is the schematic representation that the present invention has the 14 kind of structure of safety valve of online measuring ability.
Figure 16 is the schematic representation that the present invention has the 15 kind of structure of safety valve of online measuring ability.
Figure 17 is the schematic representation that the present invention has the 16 kind of structure of safety valve of online measuring ability.
Figure 18 is the schematic representation that the present invention has the 17 kind of structure of safety valve of online measuring ability.
Figure 19 is the schematic representation that the present invention has the 18 kind of structure of safety valve of online measuring ability.
Figure 20 is the schematic representation that the present invention has the 19 kind of structure of safety valve of online measuring ability.
Figure 21 is the schematic representation that the present invention has the 20 kind of structure of safety valve of online measuring ability.
Figure 22 is the schematic representation that the present invention has the 21 kind of structure of safety valve of online measuring ability.
Figure 23 is the structural representation of existing Fall lift safety valve.
Figure 24 is the schematic representation that the present invention has the 22 kind of structure of safety valve of online measuring ability.
Figure 25 is the schematic representation that the present invention has the 23 kind of structure of safety valve of online measuring ability.
Figure 26 is the schematic representation that the present invention has the 24 kind of structure of safety valve of online measuring ability.
Figure 27 is the schematic representation that the present invention has the 25 kind of structure of safety valve of online measuring ability.
Figure 28 is the schematic representation that the present invention has the 26 kind of structure of safety valve of online measuring ability.
Figure 29 is the schematic representation that the present invention has the 27 kind of structure of safety valve of online measuring ability.
Figure 30 is the schematic representation that the present invention has the 28 kind of structure of safety valve of online measuring ability.
Figure 31 is the schematic representation that the present invention has the 29 kind of structure of safety valve of online measuring ability.
Figure 32 is the schematic representation that the present invention has the 30 kind of structure of safety valve of online measuring ability.
Figure 33 is the schematic representation that the present invention has the 31 kind of structure of safety valve of online measuring ability.
Figure 34 is the schematic representation that the present invention has the 32 kind of structure of safety valve of online measuring ability.
Figure 35 is the schematic representation that the present invention has the 33 kind of structure of safety valve of online measuring ability.
Figure 36 is the structural representation of safety valve detection system of the present invention.
Figure 37 is the structural representation of the data capture assembly of safety valve detection system shown in Figure 36.
Figure 38 is the schematic representation of another structure of safety valve detection system of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with embodiment and accompanying drawing.
Fig. 1 shows the concrete structure of existing Low lift safety valve, as seen from Figure 1, existing Low lift safety valve comprises upper valve body 1, following valve body 2, valve seat 3, flap assembly, upper valve body 1 is dismountable fixed connection structure (bolt is connected) with following valve body 2, valve seat 3 and flap assembly are positioned at the space that upper valve body 1 and following valve body 2 form, described flap assembly by adjusting nut 4, go up hold-down ring 5, spring 6, down hold-down ring 7, valve rod 8, seal lobe 9, flap overcoat 10 is connected to form.Fig. 2 shows the concrete structure that the present invention has the safety valve of online measuring ability, safety valve of the present invention is formed by Low lift safety valve transformation shown in Figure 1, as seen from Figure 2, safety valve axisymmetric between the adjusting nut 4 of existing Low lift safety valve and last hold-down ring 5 is provided with proving ring 11, outer side surface or inner side surface at proving ring 11 post foil gauge 12, constitute the strain type monitoring sensor; Whether be mainly used in the pretightening force that applies under the monitoring pretension state meets the demands, can also monitor simultaneously the situation that operating spring force changes, for example the effect that is subjected to aggressive medium when spring 6 produces the cross section attenuate or localized cracks, fracture occur or at higher lower temperature effect lower spring during softening or sclerosis, changing may appear in spring force.In addition, from the variation of spring force can also the indirect monitoring flap working state monitoring, as the variation of opening state and Lift, and the identification of states such as valve port obstruction, sealing surface destruction.
The present invention have online measuring ability safety valve another structure as shown in Figure 3, as seen from Figure 3, the safety valve on the one hand between the adjusting nut 4 of Low lift safety valve shown in Figure 1 and last hold-down ring 5 axisymmetric be provided with piezoelectric transducer 13, be used to monitor the variation of spring force, on the other hand, an end that is connected with erection unit at the sealing lobe 9 of flap assembly is provided with the shrinkage pool 14 that awl round platform and cylinder make up shape, the opening of shrinkage pool 14 is provided with pressure containing disk 15, pressure containing disk 15 is connected with threaded collar 16 (being provided with outside thread), the cylindrical part of described shrinkage pool 14 is provided with internal thread, described pressure containing disk 15 is threaded by the cylindrical part of threaded collar 16 with described shrinkage pool 14, being provided with seal ring 17 between pressure containing disk 15 and shrinkage pool wall seals, be provided with foil gauge 12 in the bottom of described shrinkage pool 14, be used to detect the variation of the spring force that comes from valve rod 8 transmission, between shrinkage pool 14 bottoms and pressure containing disk 15, be provided with rheostatic type sensor 18, be used to detect the displacement of pressure containing disk 15, thus monitoring valve base channel pressure inside, the variation of temperature and sealing valve port state.
Embodiment 3
The concrete structure of present embodiment as shown in Figure 4, the safety valve except that following characteristics with embodiment 1: an end that is connected with erection unit at the sealing lobe 9 of flap assembly is provided with the columniform shrinkage pool 14 of ladder, the opening of shrinkage pool 14 is provided with pressure containing disk 15, pressure containing disk 15 is connected with threaded collar 16 (being provided with internal thread), the less cylindrical part of described shrinkage pool 14 is provided with internal thread, other establishes a ladder cylindrical body 19 and is connected with the internal thread of described shrinkage pool 14 by the outside thread than small end, described ladder cylindrical body 19 is connected with the threaded collar 16 of pressure containing disk 15 by the outside thread of bigger end, thereby pressure containing disk 15 is fixed in the opening of shrinkage pool 14, being provided with seal ring 17 between pressure containing disk 15 and shrinkage pool wall seals, be provided with foil gauge 12 in the bottom of described shrinkage pool 14, the variation of the spring force that is used to detect from the valve rod transmission and comes, on pressure containing disk 15, also be provided with foil gauge 12, be used to detect the displacement of pressure containing disk 15, thus monitoring valve base channel pressure inside.The purpose that present embodiment is provided with ladder cylindrical body 19 is convenient the installation and partition pressure containing disk 15 and relevant sensor.
Embodiment 4
The concrete structure of present embodiment as shown in Figure 5, the safety valve is formed by Low lift safety valve transformation shown in Figure 1, it is compared with safety valve shown in Figure 1 and has following different feature: an end that is connected with erection unit at the sealing lobe 9 of flap assembly is provided with the shrinkage pool 14 that round platform and cylinder make up shape, the opening of shrinkage pool 14 is provided with pressure containing disk 15, pressure containing disk 15 is connected with threaded collar 16 (being provided with outside thread), the cylindrical part of described shrinkage pool 14 is provided with internal thread, described pressure containing disk 15 is threaded by the cylindrical part of threaded collar 16 with described shrinkage pool 14, being provided with seal ring 17 between pressure containing disk 15 and shrinkage pool wall seals, be provided with foil gauge 12 in the bottom of described shrinkage pool 14, the variation of the spring force that is used to detect from the valve rod transmission and comes, on pressure containing disk 15, also be provided with foil gauge 12, be used to detect the displacement of pressure containing disk 15, thereby monitoring valve base channel pressure inside changes and the variation of sealing state; Described pressure containing disk 15 is a convolution diaphragm, and is bigger at identical load bottom offset amount of deformation because it is a flexure member, so it is highly sensitive, can reflect the variation of pressure more significantly.
The concrete structure of present embodiment as shown in Figure 6, the safety valve except that following characteristics with embodiment 2: on pressure containing disk 15, be provided with foil gauge 12 as displacement transducer, be used to detect the displacement of pressure containing disk 15, thus the variation of monitoring valve base channel pressure inside and sealing state.
The concrete structure of present embodiment as shown in Figure 7, the safety valve except that following characteristics with embodiment 2: described pressure containing disk 15 is a convolution diaphragm; Because it is a flexure member, and is bigger at identical load bottom offset amount of deformation, so it is highly sensitive, can reflect the variation of pressure and sealing state more significantly.
The concrete structure of present embodiment as shown in Figure 8, the safety valve except that following characteristics with embodiment 5: described pressure containing disk 15 does not have connecting thread ring 16, but directly is weldingly fixed on the opening of shrinkage pool 14.
The concrete structure of present embodiment as shown in Figure 9, the safety valve except that following characteristics with embodiment 3: the threaded collar and the ladder cylindrical body of pressure containing disk 15 are combined into one, form one and only have externally threaded ladder cylindrical body piece 20 than the small end cylindrical body, described ladder cylindrical body piece 20 is threaded with shrinkage pool 14, and described pressure containing disk 15 is weldingly fixed on the opening of ladder cylindrical body piece 20.
The concrete structure of present embodiment as shown in figure 10, the safety valve except that following characteristics with embodiment 4: described pressure containing disk 15 is a dome-shaped diaphragm.Dome-shaped diaphragm also is a flexure member, has highly sensitive advantage equally.
The concrete structure of present embodiment as shown in figure 11, the safety valve except that following characteristics with embodiment 8: than the cylindrical hole in the small end cylindrical body insulating support 21 and coil 22 are installed successively at ladder cylindrical body piece 20, magnetic core 23 is connected on the pressure containing disk 15 by connecting rod 24 and hard core 25, described magnetic core 23 axisymmetric stretch in the endoporus of described coil 22, magnetic core 23 matches with coil 22 can monitor the displacement of pressure containing disk 15, thereby the status parameter of monitoring valve base channel changes.
The concrete structure of present embodiment as shown in figure 12, the safety valve except that following characteristics with embodiment 10: described magnetic core 23 is wound on the connecting rod 24 by coil 26 and replaces, and described coil 26 is by also producing and the identical magnetic field of magnetic core 23 effects behind the electricity.
The concrete structure of present embodiment as shown in figure 13, the safety valve except that following characteristics with embodiment 10: described magnetic core 23 is replaced by the contact 27 that is connected on the connecting rod 24, contact 27 contacts with coil 22, form the varistor sensor, described varistor sensor also can be monitored the displacement of pressure containing disk 15, thereby the status parameter of monitoring valve base channel changes.
The concrete structure of present embodiment as shown in figure 14, the safety valve except that following characteristics with embodiment 4: foil gauge all is not set on shrinkage pool 14 bottoms and pressure containing disk 15, the substitute is on sealing lobe 9 and have through hole, and two groups of incident ray 28-1 that pass through hole are installed, 28-2 and two groups of mirror based fiber optica 29-1,29-2, two groups of incident ray 28-1, the light source of 28-2 is from the light emitting diode (not shown), two groups of mirror based fiber optica 29-1, the light path of 29-2 is connected with the phototube (not shown), two groups of incident ray 28-1,28-2 and two groups of mirror based fiber optica 29-1,29-2 fixes by bearing support 30 in the shrinkage pool 14 of sealing lobe 9, two groups of incident ray 28-1, the opening of 28-2 reaches down respectively up, relative with shrinkage pool 14 bottoms and pressure containing disk 15, two groups of mirror based fiber optica 29-1,29-2 also so is provided with, on shrinkage pool 14 bottoms and pressure containing disk 15, reflective surface 31-1 is set respectively, 31-2 makes two groups of incident ray 28-1, the light that 28-2 penetrates is through reflective surface 31-1, can inject two groups of mirror based fiber optica 29-1 after the 31-2 reflection, in the 29-2; Spring working staties such as change in displacement (by downside incident ray 28-2 and mirror based fiber optica 29-2 monitoring) or spring pressure change (by upside incident ray 28-1 and mirror based fiber optica 29-1 monitoring) have been produced because of the valve base channel change of state as pressure containing disk 15, the reflection ray of downside or last side optical fibers also can change so, thereby luminous flux is changed, the output of the phototube relative with optical fiber also changes, so the monitoring downside or the variation of going up the reflection ray of side optical fibers can be monitored the variation of spring working staties such as the variation of valve seat channel interior status parameter or spring pressure.
The concrete structure of present embodiment as shown in figure 15, the safety valve except that following characteristics with embodiment 5: on pressure containing disk 15, be not provided with foil gauge (still being provided with foil gauge 12 detection springs power in shrinkage pool 14 bottoms), the substitute is on sealing lobe 9 and have through hole, and the optical fiber 32 that passes through hole is installed, the light source of described optical fiber 32 is from the light emitting diode (not shown), the light path of the other end is connected the phototube (not shown), described optical fiber 32 is fixed by upper support 33 and lower support 34 combinations in the shrinkage pool 14 of sealing lobe 9, specifically: be provided with the wave groove 33-1 that can embed relatively with lower support 34 facing surfaces at upper support 33,34-1, described optical fiber 32 is positioned at, lower support 33, the 34 wave groove 33-1 that can embed relatively, between the 34-1; Described lower support 34 is connected with pressure containing disk 15 by connecting rod 24, hard core 25, and upper support 33 and shrinkage pool 14 bottoms are apical grafting mutually; When pressure containing disk 15 has produced change in displacement because of the valve base channel pressure inside changes, but the wave groove 34-1 roof pressure optical fiber 32 of the lower support 34 that is connected with pressure containing disk 15 makes its bending (upper support 33 is relative static), because the bending of optical fiber 32 changes luminous flux output, thereby the output of the phototube relative with optical fiber 32 is also changed, so the irradiant variation of monitoring optical fiber 32 can be monitored the variation of the working state of valve seat channel interior.
The concrete structure of present embodiment as shown in figure 16, the safety valve except that following characteristics with embodiment 5: foil gauge all is not set on shrinkage pool 14 bottoms and pressure containing disk 15, the substitute is on sealing lobe 9 and have through hole, and two groups of optical fiber passing through hole (being respectively optical fiber 35 and following optical fiber 36) are installed, two groups of optical fiber 35,36 are positioned at the part of shrinkage pool 14 respectively by retainer 37, upper support 38, middle supporting 39, lower support 40, connecting rod 24, hard core 25 fixedly installs, be specially: retainer 37 is partially submerged in the endoporus of the threaded collar 16 that is connected with pressure containing disk 15, retainer 37 centers have the hole, middle supporting 39 is arranged in described hole and cooperates be fixed together (relative lobe 9 main bodys that seal are fixed) with retainer 37, on, lower support 38,40 lay respectively in the supporting 39 on, downside, be provided with the wave groove that can embed relatively at the upper side of middle supporting 39 and the downside of upper support 38, be provided with the wave groove that can embed relatively at the downside of middle supporting 39 and the upper side of lower support 40 equally, the described optical fiber 35 of going up is positioned at, middle supporting 38, between 39 wave grooves that can embed relatively, described optical fiber 36 down is arranged in, lower support 39, between 40 wave grooves that can embed relatively, on, lower support 38,40 respectively by connecting rod 24, hard core 25 fixes with shrinkage pool 14 bottoms and pressure containing disk 15.When pressure containing disk 15 has produced change in displacement because of the valve base channel pressure inside changes, but optical fiber 36 makes its bending (middle supporting 39 relative static) under the wave groove roof pressure of the lower support 40 that is connected with pressure containing disk 15, because the bending of following optical fiber 36 changes luminous flux, thereby the output of the phototube relative with following optical fiber 36 is also changed, thus monitoring down the variation of optical fiber 36 luminous fluxes can monitor the variation of the working state of valve seat channel interior; In like manner, upper support 38 reaches and goes up the variation that optical fiber 35 mating reactions can be monitored spring working staties such as spring pressure.
The safety valve is formed by Low lift safety valve transformation shown in Figure 1, concrete structure as shown in figure 17, it is compared with safety valve shown in Figure 1 and has following different feature: described going up between hold-down ring 5 and the following hold-down ring 7 is provided with inductive transducer 41, described inductive transducer 41 is fixedlyed connected with following hold-down ring 7 with last hold-down ring 5, sliding contact between the support ring 41-1 of inductive transducer 41 and valve rod 8 or the coil 41-2, be used to detect the change in displacement of valve rod 8, thus the variation of monitoring pressing force of the spring or other status parameters.
The concrete structure of present embodiment as shown in figure 18, the safety valve except that following characteristics with embodiment 16: described going up between hold-down ring 5 and the following hold-down ring 7 is provided with varistor sensor 18, the coil 18-1 of described varistor sensor 18 is fixedlyed connected with last hold-down ring 5, contact 18-2 is fixedlyed connected with following hold-down ring 7, and coil 18-1 and valve rod 8 sliding contacts, be used to detect the change in displacement of valve rod 8, thus the variation of monitoring pressing force of the spring or other status parameters.
The concrete structure of present embodiment as shown in figure 19, the safety valve except that following characteristics with embodiment 16: described going up between hold-down ring 5 and the following hold-down ring 7 is provided with capacitive transducer 42, two pole plate 42-1,42-2 of described capacitive transducer 42 are fixedlyed connected with upper and lower hold- down ring 5,7 respectively, and be connected with valve rod 8 sliding contacts, be used to detect the change in displacement of valve rod 8, thus the variation of monitoring pressing force of the spring or other status parameters.
The concrete structure of present embodiment as shown in figure 20, the safety valve is formed by Low lift safety valve transformation shown in Figure 1, it is compared with safety valve shown in Figure 1 and has following different feature: the outer side surface of described spring 6 sticks foil gauge 12, is used for the variation of detection springs power or other status parameters.
Embodiment 20
The concrete structure of present embodiment as shown in figure 21, the safety valve is formed by Low lift safety valve transformation shown in Figure 1, it is compared with safety valve shown in Figure 1 and has following different feature: process the vertical bar-shaped trough 8-1 of three symmetries with the mode of removing material on described valve rod 8 middle part symmetrical positions, to reduce valve rod 8 rigidity, increase the amount of deformation of valve rod 8, in vertical bar-shaped trough 8-1 or outer installment foil gauge 12, be used to monitor the variation of spring force or other status parameters; In order to prevent that foil gauge is subjected to ectocine, can brush coating with sensor protection.
Embodiment 21
The concrete structure of present embodiment as shown in figure 22, the safety valve is formed by Low lift safety valve transformation shown in Figure 1, it is compared with safety valve shown in Figure 1 and has following different feature: described valve rod 8 has circular groove 8-2, stick foil gauge 12 at described circular groove 8-2 internal surface, be used to monitor the variation of spring force or other status parameters; In order to prevent that foil gauge is subjected to ectocine, can brush coating it is protected.The purpose that circular groove is set is to be convenient to install and the protection sensor.
Figure 23 shows the concrete structure of existing Fall lift safety valve, as seen from Figure 23, existing Fall lift safety valve comprises upper valve body 1, following valve body 2, valve seat 3, flap assembly, upper valve body 1 is dismountable fixed connection structure (bolt is connected) with following valve body 2, valve seat 3 and flap assembly are positioned at the space that upper valve body 1 and following valve body 2 form, described flap assembly by adjusting nut 4, go up hold-down ring 5, spring 6, down hold-down ring 7, valve rod 8, Disc holder 43, seal lobe 9 and be connected to form.Figure 24 shows the concrete structure that the present invention has the safety valve of online measuring ability, safety valve of the present invention is formed by Fall lift safety valve transformation shown in Figure 23, as seen from Figure 24, the safety valve is provided with inductive transducer 41 between hold-down ring on the existing Fall lift safety valve 5 and following hold-down ring 7, described inductive transducer 41 is described identical with embodiment 16, be used to detect the change in displacement of valve rod 8, thus the variation of monitoring pressing force of the spring or other status parameters.
The concrete structure of present embodiment as shown in figure 25, the safety valve is transformed into by Fall lift safety valve shown in Figure 23, it is compared with safety valve shown in Figure 23 and has following different feature: an end that is connected with erection unit at the sealing lobe 9 of flap assembly is provided with the shrinkage pool 14 that arc shaped surface and cylinder make up shape, described shrinkage pool 14 is connected with through hole, the lower ending opening place of shrinkage pool is provided with pressure containing disk 15, pressure containing disk 15 is connected with threaded collar 16 (being provided with outside thread), the cylindrical part of described shrinkage pool 14 is provided with internal thread, described pressure containing disk 15 is threaded by the cylindrical part of threaded collar 16 with described shrinkage pool 14, being provided with seal ring 17 between pressure containing disk 15 and shrinkage pool wall seals, pressure containing disk 15 is provided with foil gauge 12, be used to detect the displacement of pressure containing disk 15, thus the variation of monitoring valve base channel pressure inside or other status parameters; Evenly distributing in the arc shaped surface part axisymmetric of shrinkage pool 14 is provided with foil gauge 12 more than three or three, except the variation that is used for measuring spring power, also can measure the eccentric load of sealing lobe 9, sealing surface.
The concrete structure of present embodiment as shown in figure 26, the safety valve except that following characteristics with embodiment 17: on the one hand the shrinkage pool 44 with Disc holder 43 and sealing lobe 9 abutting ends is processed with chamfering, be provided with foil gauge 12 in the bottom of this shrinkage pool 44, be used to measure the variation of the pressing force of the spring that comes by valve rod 8 transmission; On the other hand, pressure containing disk 15 directly is welded on the opening of sealing lobe shrinkage pool 14, except that being set on pressure containing disk 15, measures the displacement of pressure containing disk 15 foil gauge 12, film thermocouple sensor 45 also is set on pressure containing disk 15, be used to measure the variation of pressure containing disk 15 temperature, pressure and working status parameter thereof, can calculate the temperature of leakage hole fluid according to the temperature of wall, measuring pressure is also like this.
The concrete structure of present embodiment as shown in figure 27, the safety valve except that following characteristics with embodiment 24: semicircle is processed in the Disc holder 43 and shrinkage pool 44 bottoms of sealing lobe 9 abutting ends.
The concrete structure of present embodiment as shown in figure 28, the safety valve except that following characteristics with embodiment 23: described pressure containing disk 15 is a convolution diaphragm, directly be welded on the lower ending opening place of sealing lobe shrinkage pool 14, be provided with displacement transducer 46 between convolution diaphragm 15 and sealing lobe shrinkage pool 14 upper end arc shaped surfaces, the part of described displacement transducer 46 stretches in the described through hole and fixes with thread connecting mode.
The concrete structure of present embodiment as shown in figure 29, the safety valve except that following characteristics with embodiment 23: described plain film shape pressure containing disk 15 directly is welded on the lower ending opening place of sealing lobe shrinkage pool 14, film thermocouple sensor 45 is set on pressure containing disk 15, be used to measure the temperature of pressure containing disk 15, and then the temperature variation of estimation drain port fluid, can calculate the temperature of leakage hole fluid according to the temperature of wall.
Embodiment 28
The concrete structure of present embodiment as shown in figure 30, the safety valve except that following characteristics with embodiment 23: described sealing lobe shrinkage pool 14 tops are not arc shaped surfaces, but circular cone table top, evenly distributing in circular cone face portion axisymmetric is provided with foil gauge 12 more than three or three, the circular cone table top is set can more helps arranging strain gauge transducer; Other establishes a ladder cylinder 47 that is connected with sealing lobe through hole whorl, the big end of ladder cylinder 47 also is provided with screw thread, pressure containing disk 15 is connected with internal thread ring 16, pressure containing disk 15 is connected with the big end of ladder cylinder 47 by internal thread ring 16, is provided with seal ring 17 between internal thread ring 16 and sealing lobe shrinkage pool wall.This Placement is convenient to install and partition pressure containing disk and sensor.
Embodiment 29
The concrete structure of present embodiment as shown in figure 31, safety valve and embodiment's 14 disclosed safety valve structures are similar, its difference is: the safety valve is a Fall lift safety valve, perforate on the sealing lobe 9 is positioned at sealing lobe 9 and stretches into a counter end of stretching dish, from then on optical fiber 32 held in the shrinkage pool 14 that penetrates sealing lobe 9 after inserting safety valve, in shrinkage pool 14, after upper and lower supporting 33,34, from then on hold again and stretch out, and then draw safety valve.The action principle of safety valve is close with embodiment 14.
The concrete structure of present embodiment shown in figure 32, the safety valve except that following characteristics with embodiment 1: for monitor the sealing lobe 9 Lift, between sealing lobe 9 and flap overcoat 10, photoelectric sensor is set, be specially: have adjacent aperture (circumferential position is shown in the A-A view) in flap overcoat 10 and sealing lobe 9 opposing end faces, the setting in a certain angle of adjacent aperture, light emitting diode 47 and photosensitive element 48 (position concerns shown in partial view) are installed respectively, on sealing lobe 9 end faces reflective surface 49 is installed, the light that light emitting diode 47 sends is received by photosensitive element 48 after reflective surface 49 reflections.When the relative distance of flap overcoat 10 and sealing lobe 9 changes, change by the light quantity of light emitting diode 47 incident light photosensitive elements 48, by the relative displacement of precise monitoring sealing lobe 9 and flap overcoat 10 effectively of this photoelectric sensor.
Embodiment 31
The concrete structure of present embodiment as shown in figure 33, the safety valve except that following characteristics with embodiment 1: for monitor the sealing lobe Lift, between sealing lobe and flap overcoat, electromagnetic sensor 50 is set, be specially: sealing lobe 9 matches face with flap overcoat 10 in, coil 50-1 is installed, flap overcoat 10 matches face with sealing lobe 9 in, magnetic core 50-2 is installed, described coil 50-1 and magnetic core 50-2 produce electromagnetic induction, when flap overcoat 10 changes with the relative distance that seals lobe 9, the induction amount promptly changes, and utilizes the relative displacement of precise monitoring sealing lobe 9 and flap overcoat 10 effectively of this electromagnetic sensor.
The concrete structure of present embodiment as shown in figure 34, the safety valve except that following characteristics with embodiment 1: for monitor the sealing lobe 9 Lift, between sealing lobe 9 and flap overcoat 10, optical fiber transducer 51 is set, be specially: in flap overcoat 10, be provided with through hole, incident ray 51-1 is installed in the through hole and receives optical fiber 51-2, incident ray 51-1 is relative with light source (as light emitting diode), it is relative with photocell (as phototube) to receive optical fiber 51-2, in sealing lobe 9 and incident ray 51-1 and reception optical fiber 51-2 opposing end faces reflective surface 51-3 is installed, the light that incident ray 51-1 penetrates is injected after reflective surface 51-3 reflection and is received optical fiber 51-2, be sent to photocell by receiving optical fiber 51-2, when flap overcoat 10 changes with the relative distance that seals lobe 9, the light-receiving amount that receives optical fiber 51-2 promptly changes, so the relative displacement that the safety valve of optical fiber transducer can accurately be monitored sealing lobe 9 and flap overcoat 10 originally is housed.
The concrete structure of present embodiment as shown in figure 35, the safety valve except that following characteristics with embodiment 1: for monitor the sealing lobe 9 Lift, symmetrical position at flap overcoat 10 is provided with light emitting diode 47 and photosensitive element 48, be specially: light emitting diode 47 and photosensitive element 48 (can be provided with in groups) are set along the diameter symmetry position at flap overcoat 10, on valve rod 8 positions of correspondence, through hole 8-1 is set, the light that is sent by light emitting diode 47 can receive by the photosensitive element 48 that valve rod 8 is installed by the symmetrical position place, when the distance change of relative flap overcoat 10 takes place owing to the drive that seals lobe 9 in valve rod 8, luminous flux in the through hole 8-1 changes, thereby the photoelectric current that causes photosensitive element 48 to produce changes, so the safety valve can accurately be monitored the relative displacement of sealing lobe 9 and flap overcoat 10, promptly seals the variation of lobe 9 Lifts.
The structure of utilizing the safety valve group detection system that aforementioned Fall lift safety valve with online measuring ability realizes as shown in figure 36, comprise the sensor, the data acquisition process assembly that are arranged on the flap assembly, sensor is connected with safety valve signal-transmitting cable 53 outward by the connecting line 52 that passes the perforate of safety valve respective members, and signal-transmitting cable 53 is connected with the data acquisition process assembly simultaneously; Described data acquisition process assembly is connected and composed by signal input module, signal conversion module, A/D modular converter, signal processing module as shown in figure 37, and wherein, signal input module mainly realizes the extraction of non-electric charge quantity signalling; The signal conversion module realizes functions such as signal amplification, filtration; The A/D modular converter is mainly realized the digitizing conversion of signal; Signal processing module is finished the further processing to signal, mainly be meant the single-chip microcomputer, palm PC, microcomputer, mainframe computer or other data processing equipments that utilize the band microprocessor, by the language programming technology, the signal that obtains is carried out analyses such as waveform, time domain, frequency domain, the data in real time that perhaps signal processing is obtained shows, writes down, stores, so that obtain various information, even realize reporting to the police automatically or sending prewarning information about the safety valve running state.
The structure of utilizing the safety valve group detection system that aforementioned Low lift safety valve with online measuring ability realizes as shown in figure 38, its structure and the mode of action are close with embodiment 32; Utilize data acquisition process assembly, corresponding interface and create corresponding Monitoring and Controlling software, data analyzing and processing software, can also realize the networked remote monitoring and the wireless monitor of safety valve.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (11)
1, a kind of safety valve with online measuring ability, comprise upper valve body, following valve body, valve seat, flap assembly, upper valve body is dismountable fixed connection structure with following valve body, valve seat and flap assembly are positioned at the space that upper valve body and following valve body form, and described flap assembly comprises sealing lobe, valve rod, spring, goes up hold-down ring, following hold-down ring; It is characterized in that: include sensor, described sensor is arranged on the flap assembly and by connecting line and is connected to outside the safety valve.
2, the safety valve with online measuring ability according to claim 1, it is characterized in that: the end that the sealing lobe of described flap assembly is connected with erection unit is provided with shrinkage pool, the opening of shrinkage pool is provided with pressure containing disk, sensor is arranged in the shrinkage pool or on the pressure containing disk, and is connected to outside the safety valve by the signaling line that is arranged at the shrinkage pool wall.
3, the safety valve with online measuring ability according to claim 2 is characterized in that: described shrinkage pool is axisymmetric shape or non-axisymmetric shape.
4, the safety valve with online measuring ability according to claim 2 is characterized in that: the concrete form that described sensor is arranged at shrinkage pool is: sensor is arranged in shrinkage pool top, shrinkage pool wall or shrinkage pool space; The concrete form that described sensor is arranged on the pressure containing disk is: sensor is positioned at the one or both sides of pressure containing disk; Have through hole on the described shrinkage pool wall and be communicated to the sealing lobe outside, the lead that is connected with sensor is connected to outside the sealing lobe by through hole, and further is connected to outside the safety valve; The Placement of described pressure containing disk and sealing lobe for welding, removably connect or the Placement that adopts ready-package and have a sealing configuration is connected.
5, the safety valve with online measuring ability according to claim 1 and 2 is characterized in that: described sensor is resistive transducer, piezoelectric transducer, thermocouple sensor, photoelectric sensor, Hall transducer, inductive pickup, capacitive transducer, fiber optic sensor.
6, the safety valve with online measuring ability according to claim 1 and 2 is characterized in that: spring, valve rod, flap overcoat, on hold-down ring, between hold-down ring or the upper and lower hold-down ring sensor is set down.
7, the safety valve with online measuring ability according to claim 6 is characterized in that: installation position displacement sensor on described upward hold-down ring or the following hold-down ring, and described displacement transducer is electromagnetic type, strain type or optical displacement sensor; Or between last hold-down ring and gland nut, proving ring is installed, distortion or force transducer are set on proving ring; Perhaps descending installing force sensor between hold-down ring and valve rod support rim.
8, the safety valve with online measuring ability according to claim 6 is characterized in that: described spring arranged outside has strain gauge transducer.
9, the safety valve with online measuring ability according to claim 6, it is characterized in that: process the vertical bar-shaped trough or the circumferential groove of symmetry on the symmetrical position of described valve rod middle part with the mode of removing material, in vertical bar-shaped trough or in the circumferential groove strain gauge transducer is set.
10, the safety valve with online measuring ability according to claim 1 and 2 is characterized in that: between sealing lobe and flap overcoat photoelectric sensor, electromagnetic sensor, fiber optic sensor are set.
11, a kind of detection system to each described safe monitoring valves of claim 1～10 is characterized in that: comprise the sensor, the data acquisition process assembly that are arranged on the flap assembly, the data acquisition process assembly is connected with described sensor; Described data acquisition process assembly is connected to form by signal input module, signal conversion module, A/D modular converter, signal processing module.
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| CNB2005100331240A CN100353106C (en) | 2005-02-04 | 2005-02-04 | Safety valve with on-line detection function and detection system therefor |
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| CNB2005100331240A CN100353106C (en) | 2005-02-04 | 2005-02-04 | Safety valve with on-line detection function and detection system therefor |
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| CN1702361A CN1702361A (en) | 2005-11-30 |
| CN100353106C true CN100353106C (en) | 2007-12-05 |
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| CNB2005100331240A Expired - Fee Related CN100353106C (en) | 2005-02-04 | 2005-02-04 | Safety valve with on-line detection function and detection system therefor |
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| CN1702361A (en) | 2005-11-30 |
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