阅读说明：本技术 气相色谱仪用耐污染分流捕集阱滤芯及智能维护预警系统 (Pollution-resistant shunting trap filter element for gas chromatograph and intelligent maintenance early warning system ) 是由 周小靖 何剑威 杨蒙达 周勇 于 2021-09-14 设计创作，主要内容包括：本发明涉及分析仪器技术领域,尤其涉及一种气相色谱仪用耐污染分流捕集阱滤芯及智能维护预警系统,该滤芯包括滤芯壳体和固定于滤芯壳体端部的滤芯压盖,滤芯壳体的两端分别开设有滤芯入口和滤芯出口,滤芯出口内侧由近及远固定有第一过滤层和滤芯压环,滤芯压环上设有透气间隙；且滤芯壳体内填充有吸附剂。该滤芯采用紧配压环和多层无纺布材质过滤层组合的多层滤芯结构,还涉及一种智能维护预警系统,该系统包括数据采集模块、控制单元及显示模块；可杜绝颗粒、粉尘击穿滤芯过滤结构的问题,能够做到对后端分流比例阀的长期高效防护,该系统对分流捕集滤芯及其他相关零部件具有很好的监测预警提示功能。(The invention relates to the technical field of analytical instruments, in particular to a pollution-resistant shunting and trapping filter element for a gas chromatograph and an intelligent maintenance early warning system, wherein the filter element comprises a filter element shell and a filter element gland fixed at the end part of the filter element shell, two ends of the filter element shell are respectively provided with a filter element inlet and a filter element outlet, the inner side of the filter element outlet is fixedly provided with a first filter layer and a filter element press ring from near to far, and the filter element press ring is provided with a ventilation gap; and the filter element shell is filled with an adsorbent. The filter element adopts a multi-layer filter element structure formed by combining a tight-fit compression ring and a plurality of layers of non-woven fabric filter layers, and also relates to an intelligent maintenance early warning system which comprises a data acquisition module, a control unit and a display module; can stop granule, dust puncture filter core filtration's problem, accomplish the long-term high-efficient protection to rear end reposition of redundant personnel proportional valve, this system has fine monitoring early warning prompt facility to reposition of redundant personnel entrapment filter core and other relevant spare parts.)

1. The pollution-resistant shunting and trapping filter element for the gas chromatograph is characterized by comprising a filter element shell (1) and a filter element gland (2) which is detachably and fixedly sealed at the end part of the filter element shell (1), wherein a filter element inlet (3) and a filter element outlet (4) are respectively formed at two ends of the filter element shell (1), a first filter layer (5) and a filter element press ring (6) are detachably fixed on the inner side of the filter element outlet (4) from near to far, and an air permeable gap is formed in the filter element press ring (6); and the filter element shell (1) is filled with an adsorbent (9).

2. The contamination resistant flow-dividing trap filter element for gas chromatograph according to claim 1, wherein the filter element pressure ring (6) has a sheet-like multi-tooth ring structure and is closely attached to the first filter layer (5).

3. The contamination-resistant flow-dividing trap filter element for gas chromatograph according to claim 1, wherein a second filter layer (7) and a third filter layer (8) are further fixed in the filter element housing (1) in this order, the third filter layer (8) is fixed to the inside of the filter element cover (2) at one end of the filter element inlet (3), and the second filter layer (7) is fixed between the first filter layer (5) and the third filter layer (8).

4. The contamination-resistant flow-dividing trap filter element for gas chromatograph according to claim 3, wherein the first filter layer (5), the second filter layer (7), and the third filter layer (8) are all nonwoven fabric layers.

5. The contamination-resistant split-flow trap filter cartridge for gas chromatograph according to claim 1, wherein O-rings (10) are fixed between the filter cartridge housing (1) and the filter cartridge cover (2) and on end faces of both ends of the filter cartridge housing (1).

6. An intelligent maintenance early warning system, which is based on the pollution-resistant shunting trap filter element for the gas chromatograph in any one of claims 1 to 5, and comprises a data acquisition module, a control unit and a display module; the data acquisition module comprises a pressure detection unit and a counting unit;

the pressure detection unit is used for detecting the pressure of the absorbent area in the filter element and sending the detected pressure information to the control unit;

the counting unit is used for performing data statistics on the use times or/and the use duration of each consumable part in the gas chromatograph in a counting or/and timing mode respectively and sending the counted use times or/and the use duration to the control unit;

the control unit is used for respectively receiving the pressure information transmitted by the pressure detection unit and the data statistical information including the use times or/and the use duration transmitted by the counting unit, respectively comparing the received pressure information with a preset pressure threshold, comparing the received counting or/and timing information with the preset use time threshold or/and use duration threshold one by one, and when the received pressure information, counting or/and timing information exceed the corresponding preset threshold, the control unit sends corresponding early warning information to the display module;

and the display module is used for receiving the pressure information, the counting or/and the timing information sent by the control unit, displaying and early warning.

7. The intelligent maintenance early warning system of claim 6, wherein the pressure detection unit comprises a pressure sensor, and the pressure sensor is arranged in the filter element and used for detecting the pressure of the absorbent area in the filter element and sending the detected pressure information to the control unit; the counting unit is a counter, the control unit is a microprocessor or a CPU, and the display module comprises a display screen and a signal lamp.

8. The intelligent maintenance early warning system of claim 7, wherein the display screen is configured to receive and display pressure information, counting or/and timing information and corresponding early warning information sent by the control unit;

the signal lamp is used for displaying the life cycle state of the filter element or/and other consumable parts in the form of light color.

9. The intelligent maintenance pre-warning system of claim 8, wherein: the life cycle state is derived by the following formula,

in the formula, X is the life cycle percentage, and Y is the pressure value in the filter element, the use times or/and the use duration of each consumable part, which are/is acquired by the corresponding data acquisition module; and Z is a preset threshold corresponding to Y.

10. The intelligent maintenance and early warning system of claim 7, wherein the data acquisition module further comprises a temperature detection unit, and the temperature detection unit is configured to detect the temperature in the filter element, send the detected temperature information to the control unit, and display the temperature information on the display module.

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of analytical instruments, in particular to a pollution-resistant shunting trap filter element for a gas chromatograph and an intelligent maintenance early warning system.

[ background of the invention ]

The gas chromatograph is an instrument for qualitatively and quantitatively analyzing a multi-component complex mixture by using a chromatographic separation technology and a detection technology.

The trap is a gas purification device filled with an adsorbent, is commonly used for gas purification in a gas chromatograph, and can effectively adsorb impurity components in carrier gas after being arranged at a carrier gas inlet valve so as to ensure the purity of the carrier gas; when the device is arranged at a shunting/non-shunting injection port and a spacer cleaning gas outlet, organic samples in carrier gas can be effectively adsorbed, and the pipeline blockage caused by the condensation of the samples in subsequent pipelines is prevented.

The existing shunting trapping system generally has a trapping trap filter element adsorbent filling gap, is lack of long-term high-efficiency interception of particles and dust, and a shunting proportional valve is very sensitive to the particles and the dust, most of gas circuit control faults are caused by the gaps, particularly an integrally designed EPC module is usually required to be integrally replaced when the EPC module breaks down, so that high maintenance cost is brought to a user.

The gas chromatograph is lack of an intelligent detection means for the service life of the shunting and trapping system, so that a user is difficult to judge when necessary replacement and maintenance are carried out to ensure the long-term stable operation of the instrument, a small number of users maintain by feel/habit, and a large number of users do not maintain until the instrument is stopped and repaired after the instrument breaks down.

The shunting trapping system lacks clear and definite state interaction suggestion or early warning, and adsorbent self does not have indication effect, can't distinguish by naked eyes whether inefficacy, and the adsorbent is in multilayer seal structure usually simultaneously, and difficult frequent dismantlement is observed.

[ summary of the invention ]

In order to solve the problems in the background art, the invention provides a pollution-resistant shunting trap filter element for a gas chromatograph and an intelligent maintenance early warning system.

In order to achieve the purpose, the invention provides the following technical scheme: a pollution-resistant shunting and trapping filter element for a gas chromatograph comprises a filter element shell and a filter element gland which is detachably, fixedly and hermetically arranged at the end part of the filter element shell, wherein a filter element inlet and a filter element outlet are respectively formed at two ends of the filter element shell, a first filter layer and a filter element compression ring are detachably and fixedly arranged on the inner side of the filter element outlet from near to far, and a ventilation gap is formed in the filter element compression ring; and the filter element shell is filled with an adsorbent.

Preferably, the filter element pressing ring is of a sheet-shaped multi-tooth circular ring structure and is tightly attached to the first filter layer.

Preferably, a second filter layer and a third filter layer are sequentially fixed in the filter element shell, the third filter layer is fixed at one end of the filter element inlet, the inner side of the filter element pressing cover is fixed on the filter element shell, and the second filter layer is fixed between the first filter layer and the third filter layer.

Preferably, the first filter layer, the second filter layer and the third filter layer are all non-woven fabric layers.

Preferably, O-shaped sealing rings are fixed between the filter element shell and the filter element pressing cover and on the end faces of two ends of the filter element shell.

The invention also provides an intelligent maintenance early warning system, which is based on the pollution-resistant shunting and trapping trap filter element for the gas chromatograph and comprises a data acquisition module, a control unit and a display module; the data acquisition module comprises a pressure detection unit and a counting unit; the pressure detection unit is used for detecting the pressure of the absorbent area in the filter element and sending the detected pressure information to the control unit; the counting unit is used for performing data statistics on the use times or/and the use duration of each consumable part in the gas chromatograph in a counting or/and timing mode respectively and sending the counted use times or/and the use duration to the control unit; the control unit is used for respectively receiving the pressure information transmitted by the pressure detection unit and the data statistical information including the use times or/and the use duration transmitted by the counting unit, respectively comparing the received pressure information with a preset pressure threshold, comparing the received counting or/and timing information with the preset use time threshold or/and use duration threshold one by one, and when the received pressure information, counting or/and timing information exceed the corresponding preset threshold, the control unit sends corresponding early warning information to the display module; and the display module is used for receiving the pressure information, the counting or/and the timing information sent by the control unit, displaying and early warning.

Preferably, the pressure detection unit comprises a pressure sensor, and the pressure sensor is arranged in the filter element and used for detecting the pressure of the absorbent area in the filter element and sending the detected pressure information to the control unit; the counting unit is a counter, the control unit is a microprocessor or a CPU, and the display module comprises a display screen and a signal lamp.

Preferably, the display screen is used for receiving and displaying the pressure information, the counting or/and timing information and the corresponding early warning information sent by the control unit; the signal lamp is used for displaying the life cycle state of the filter element or/and other consumable parts in the form of light color.

Preferably, the life cycle state is derived by the following formula,

in the formula, X is the life cycle percentage, and Y is the pressure value in the filter element, the use times or/and the use duration of each consumable part, which are/is acquired by the corresponding data acquisition module; z is a preset threshold corresponding to Y;

then, the control unit is used for carrying out one-by-one correspondence and display on each obtained life cycle state and each preset light color of each signal lamp: namely, the control unit converts the life cycle state obtained by the formula operation into a light color signal and sends the light color signal to a corresponding signal lamp for display.

Preferably, the data acquisition module further comprises a temperature detection unit, and the temperature detection unit is used for detecting the temperature in the filter element, sending the detected temperature information to the control unit, and displaying the detected temperature information on the display module.

The invention has the beneficial effects that:

1) the multilayer filter core structure that reposition of redundant personnel entrapment filter core adopted close-fitting clamping ring and multilayer non-woven fabrics material filtering layer to combine can stop granule, dust and puncture filter core filtration's problem, can accomplish the long-term high-efficient protection to rear end reposition of redundant personnel proportional valve.

2) Through two intelligent detection means of pressure blockage real-time monitoring data feedback and maintenance early warning counting management to the reposition of redundant personnel entrapment filter core and other relevant spare parts, richen gas chromatograph's self intelligent judgment ability, it is more accurate to maintain the judgement and compare user's sense organ, alleviates artifical maintenance pressure by a wide margin.

3) The control unit provides early warning prompt based on light color change through real-time signal transmission between the wireless communication chip and the LED lamp module, helps a user to know the current state of the shunting and trapping system more intuitively, and greatly reduces the risk of fault shutdown.

[ description of the drawings ]

FIG. 1 is a schematic diagram of a split trap filter element according to the present invention;

FIG. 2 is a schematic view of a filter element compression ring according to the present invention;

FIG. 3 is a flow chart of intelligent monitoring in the present invention;

FIG. 4 is a flow chart of the intelligent monitoring control of the present invention;

FIG. 5 is a flow chart of the intelligent maintenance count management control of the present invention;

FIG. 6 is a flow chart of intelligent early warning interaction in the present invention;

the filter comprises a filter element shell, a filter element gland, a filter element inlet, a filter element outlet, a first filter layer, a filter element pressure ring, a second filter layer, a third filter layer, an adsorbent and a sealing ring, wherein the filter element shell is 1, the filter element gland is 2, the filter element inlet is 3, the filter element outlet is 4, the first filter layer is 5, the filter element pressure ring is 6, the second filter layer is 7, the third filter layer is 8, the adsorbent is 9 and the sealing ring is 10.

[ detailed description ] embodiments

The present application will be described in further detail with reference to specific examples.

A pollution-resistant shunting trap filter element for a gas chromatograph is shown in figures 1 and 2 and comprises a filter element shell 1 and a filter element gland 2 which is detachably, fixedly and hermetically sealed at the end part of the filter element shell 1, wherein both ends of the filter element shell 1 are respectively provided with a filter element inlet 3 and a filter element outlet 4, a first filter layer 5 and a filter element press ring 6 are detachably and fixedly arranged on the inner side of the filter element outlet 4 from near to far, and a ventilation gap such as a ventilation hole is arranged on the filter element press ring 6; and the filter element shell 1 is filled with an adsorbent 9, such as active carbon, molecular sieve, silica gel, acidic characteristic adsorbent, phosphide characteristic adsorbent and the like.

In some embodiments, the filter element pressing ring 6 is a multi-tooth ring structure in a sheet shape and is tightly attached to the first filter layer 5.

In some embodiments, a second filter layer 7 and a third filter layer 8 are sequentially fixed in the filter element housing 1, the third filter layer 8 is fixed on the inner side of the filter element pressing cover 2 at one end of the filter element inlet 3, and the second filter layer 7 is fixed between the first filter layer 5 and the third filter layer 8.

In some embodiments, the adsorbent 9 comprises a physical adsorbent and/or a chemical adsorbent. In the working process, various physical adsorbents or targeted chemical adsorbents are flexibly matched according to the adsorption and trapping requirements of the shunting trapping trap, so that the efficient adsorption of sample components is finally realized, and the rear-end emptying assembly is protected.

In some embodiments, the first filter layer 5, the second filter layer 7, and the third filter layer 8 are all nonwoven layers, and are multi-layer microporous nonwoven fabrics, which can intercept the physical breakdown of micron-sized dust and particles.

In some embodiments, O-rings 10 are fixed between the filter cartridge housing 1 and the filter cartridge cover 2 and on the end surfaces of the two ends of the filter cartridge housing 1.

When the device works, gas chromatography carrier gas carries high-temperature vaporized sample components, enters a shunting and collecting trap filter element from a shunting and collecting filter element inlet 3, is subjected to targeted high-efficiency adsorption by a plurality of filter element adsorbents 9 and strong interception by a plurality of non-woven fabric filter layers, stops the sample components and dust particles in the shunting and collecting trap filter element, and is discharged through a shunting and collecting filter element outlet 4 and a rear-end emptying assembly. The filter element shell 1 and the filter element end cover 2 are both made of stainless steel metal materials, the filter element shell 1 is a filter element main body, and the filter element end cover 2 is a detachable assembly type component; the sealing of the filter element shell 1 and the filter element gland 2 is realized by an O-shaped fluororubber sealing ring 10 through mirror sealing, so that the integral sealing performance of the shunt and complementary trap filter element is ensured.

Further referring to fig. 2, the filter element pressure ring 6 contained in the filter element structure of the split-flow trapping trap is a stainless steel metal sheet with a multi-tooth ring structure, is tightly fitted and press-fitted with the inner cavity of the filter element shell 1 through a matching assembly tool, and is matched with the first filter layer 5 made of non-woven fabric material, so that a gapless physical isolation layer is formed, high-efficiency interception of micron-sized dust and particulate matters can be realized, the dust and the particles are prevented from passing through, and high-efficiency protection is formed for the emptying assembly after the filter element outlet of the split-flow trapping trap.

The system is based on the pollution-resistant shunting trapping trap filter element for the gas chromatograph and comprises a data acquisition module, a control unit and a display module; the data acquisition module comprises a pressure detection unit and a counting unit;

the pressure detection unit is used for detecting the pressure of the absorbent area in the filter element, monitoring the pressure data of the area by using a pressure sensor to better represent the adsorption state, and sending the detected pressure information to the control unit;

the counting unit is used for performing data statistics on the use times or/and the use duration (referring to the accumulated use duration of each part) of each consumable part in the gas chromatograph in a counting or/and timing mode respectively and sending the counted use times or/and the use duration to the control unit; whether the gas chromatograph is used or not is confirmed by triggering a sample injection mechanism, namely, one sample injection operation is executed and the gas chromatograph is used once.

The control unit is used for respectively receiving the pressure information transmitted by the pressure detection unit and the data statistical information including the use times or/and the use duration transmitted by the counting unit, respectively comparing the received pressure information with a preset pressure threshold, comparing the received counting or/and timing information with the preset use time threshold or/and use duration threshold one by one, and when the received pressure information, counting or/and timing information exceed the corresponding preset threshold, sending corresponding early warning information to the display module by the control unit;

and the display module is used for receiving the pressure information, the counting or/and the timing information sent by the control unit, displaying and early warning.

It should be noted that various data information collected by the data collection module, or information of other modules and units may be converted by the digital-to-analog converter and then sent to the control unit, or sent from the control unit.

In some embodiments, the pressure detection unit comprises a pressure sensor, the pressure sensor is arranged in the filter element and used for detecting the pressure of the absorbent area in the filter element and sending the detected pressure information to the control unit; the counting unit is a counter, the number is +1 after the sample injection process is executed once, the counter is internally provided with a lower computer main program, the control unit is a microprocessor or a CPU, and the display module comprises a display screen and a signal lamp.

In some embodiments, the display screen is used for receiving and displaying the pressure information, the counting or/and timing information and the corresponding early warning information sent by the control unit; the signal lamp is used for displaying the life cycle state of the filter element or/and other consumable parts in the form of light color; wherein, the life cycle state of the filter element or/and other consumable parts is obtained by the following formula:

in the formula, X is the life cycle percentage, Y is the pressure value in the filter element, the use times or the use duration of each consumable part, which are acquired by the corresponding data acquisition module, and Z is a preset threshold corresponding to Y;

and then, the control unit corresponds the obtained life cycle states and preset light colors of the signal lamps one by one and displays the corresponding life cycle states, namely, the control unit converts the life cycle states obtained through the formula operation into light color signals and sends the light color signals to the corresponding signal lamps for displaying. Specifically, it may be indicated by turning on a green light when the part life consumption (i.e., percentage of life cycle) < 80%; indicating the service life consumption of the parts by lightening a yellow lamp between 80% and 100%; when the life of the part is consumed (i.e. percentage of life cycle) > 100%, it is indicated by lighting a red light.

In some embodiments, the data acquisition module further comprises a temperature detection unit, the temperature detection unit is a temperature sensor, and the temperature sensor is disposed in the filter element and used for detecting the temperature in the filter element, sending the detected temperature information to the control unit, and displaying the temperature information on the display module.

Examples

An intelligent maintenance early warning system is shown in figures 3-6, and the system is based on the pollution-resistant shunting trapping trap filter element for the gas chromatograph. The specific functions are realized by the following modes:

firstly, it should be noted that the following intelligent monitoring of pressure is accomplished by the pressure sensor, the temperature sensor, the control unit and the display module which are arranged and communicated with each other through signals.

The maintenance counting intelligent management is completed through the counting module, the control unit and the display module which are arranged and communicated with each other through signals.

(1) Intelligent monitoring system for pressure blockage:

the realization principle is as follows: along with the continuous adsorption and trapping of the target sample component by the adsorbent filled in the filter element in the shunting and supplementing trap, the form and the property of the adsorbent of the filter element can be changed, the physical characteristic is shown in that the resistance of the adsorbent area of the filter element is gradually increased, and further the pressure change is influenced, and the incidence relation of the adsorbent and the pressure change is basically a curve approaching to a limit value. Based on the characteristics, the pressure change condition of the adsorption area of the filter element is detected and is compared with theoretical thresholds of different adsorption systems, so that the service life cycle condition of the current shunt and complementary trap filter element can be obtained, and prompt conclusions about the percentage of the life cycle and whether the filter element needs to be replaced and maintained can be given. Fig. 4 is a control loop logic when the threshold is automatically monitored, and the system always monitors whether the real-time state exceeds the threshold, and gives state values GC and PC.

Based on the principle, the intelligent monitoring of pressure blockage in the flow dividing and trapping flow path is realized in the following specific mode:

for intelligent monitoring of pressure blockage, intelligent monitoring can be started in a timing self-triggering or manual intervention mode, and the main process is as follows: the method comprises the steps of opening a switch of an intelligent monitoring related module system, setting temperature parameters required by monitoring through a temperature sensor and a control unit, then closing an auxiliary flow path, executing a trapping flow path complete opening instruction after the temperature and other states are stable, then continuously collecting pressure information of the trapping flow path through a pressure sensor, reading a stable value, and transmitting the pressure information to databases of different adsorption systems for corresponding preset threshold value comparison and analysis. If the current pressure value is smaller than the theoretical preset threshold value, the intelligent detection is passed, the system gives a shunting and trapping life cycle prompt, and automatically executes a system recovery program to analyze the state; if the current pressure value is larger than or equal to the theoretical preset threshold value, the intelligent detection does not pass, the system (main control unit) gives a fault state prompt of the shunting and trapping flow path, a user can perform manual troubleshooting and maintenance work according to fault maintenance guidance, the shunting and trapping intelligent detection can be started manually again after the problem is solved, the process is executed secondarily, and the detection result is obtained.

(2) Count system is maintained to intelligence:

the intelligent maintenance counting system is mainly used for accurately counting and managing the use states of consumable parts in the gas chromatograph. The user can customize the usable times or days of the shunt trap according to the use condition, and reset the corresponding counting maintenance when replacing a new shunt trap module. When the user selects the 'times' as a reference counting mode, the system is +1 on the basis of the current counting every time the gas chromatograph starts an analysis process; when the user selects the "days" as the reference counting mode, the gas chromatograph will be +1 on the basis of the current count every 24h according to the timing system of the internal circuit. No matter what kind of count mode, when the count value of certain module reaches the settlement threshold value, maintain the maintenance early warning information that count intelligent management system can send this module promptly, the user can be according to maintaining the module maintenance work of guiding the completion.

(3) An early warning processing system for executing intelligent early warning interaction:

the intelligent detection system for pressure blockage and the intelligent maintenance counting system submit the acquired data information to a control unit (a CPU processing unit) based on various triggering and monitoring implementation modes, and form early warning information of a shunting and trapping filter element and other parts after operation analysis and summarization. The early warning information can be output interactively in 3 forms of external equipment, workstation software and internal equipment. The external equipment can be a wireless LED lamp module, current state information and life cycle stages of the shunt trapping filter element and other parts can be continuously and real-timely given out by receiving a wireless communication chip arranged in a CPU host circuit, clear maintenance early warning prompts are given out in the form of light colors, workstation software can be switches, chromatographic workstations and other software, the use condition of consumables is displayed by using a consumable monitoring dynamic management module, the internal equipment is various in form, and the external equipment can be a built-in buzzer, a bound indicator light and other forms. The internal equipment displays the state information and the early warning information processed by the intelligent monitoring management module and the maintenance counting management module through the display screen, and is more visual.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.