KR102104541B1 - Reflux sample conditioner equipped with pneumatic temperature controller - Google Patents

Abstract

The present invention relates to a sample gas returning device for a gas analyzer including a pneumatic temperature controller individually controlling opening and closing operations of a first pneumatic valve for cooling sample gas and a second pneumatic valve for discharging the sample gas in accordance with the temperature of the sample gas discharged to the gas analyzer. The sample gas returning device for a gas analyzer accurately controls the discharge of the sample gas and cooling of the sample gas and, therefore, can discharge the sample gas discharged to the gas analyzer by accurately corresponding to a reference temperature to improve accuracy of an analysis test about the sample gas. The sample gas returning device for a gas analyzer including the pneumatic temperature controller includes: a temperature sensor installed in a discharge pipe connected to the gas analyzer and measuring the temperature of the discharged sample gas in real time; a supply line supplying compressed air used to open and close the valve; a first discharge line and a second discharge line discharging the compressed air to the first and second pneumatic valves, respectively; a valve unit opening and closing between the supply line and the first discharge line and between the supply line and the second discharge line, respectively, to control the discharge of the compressed air; and a valve control unit fixing and setting the reference temperature of the sample gas and controlling the discharge of the compressed air in the valve unit in accordance with difference of real-time temperature measured by the temperature sensor in comparison with the reference temperature which is set.

Description

Sample gas reflux device for gas analyzer with pneumatic temperature controller {REFLUX SAMPLE CONDITIONER EQUIPPED WITH PNEUMATIC TEMPERATURE CONTROLLER}

The present invention according to the temperature of the sample gas discharged to the gas analyzer, the sample gas for a gas analyzer having a pneumatic temperature controller to control the opening and closing operation of the first pneumatic valve for cooling the sample gas and the second pneumatic valve for discharging the sample gas, respectively It relates to a reflux device, and more specifically, by precisely controlling the cooling of the sample gas and the discharge of the sample gas, so that the sample gas discharged by the gas analyzer is precisely matched to the reference temperature, and discharged, thereby analyzing the sample gas. It relates to a sample gas reflux device for a gas analyzer having a pneumatic temperature controller to increase the accuracy.

Gas reflux device for gas analyzer that extracts and discharges sample gas for use in the analysis of components of gas and the collection or removal test of specific components in piping where high-temperature and high-pressure gas is transferred from various plant facilities such as the petrochemical industry Is installed.

For example, pyrolysis gasoline (py-gas) is obtained by pyrolysis and catalytic cracking in crude oil, and because it contains many aromatic compounds, benzene, toluene, and xylene Since the analysis of the sample gas is regularly performed for the extraction of raw materials such as gas, a gas reflux device for a gas analyzer is installed in the transport pipe for pyrolysis gasoline.

The gas, such as pyrolysis gasoline being transported, has a very high temperature and contains various foreign substances (condensable substances, polymers, particulates, etc.), so it is possible to accurately analyze the sample gas when cooling and filtering the sample gas. There is no problem in the transport of the sample gas.

At this time, the sample gas extracted from the transfer pipe must be cooled to a reference temperature suitable for analysis and discharged to the gas analyzer. Since the cooling accuracy of the sample gas is poor, it is discharged to the gas analyzer when the sample gas is accurately cooled to the reference temperature. Control technology is very important.

However, the gas reflux device for the conventional gas analyzer precisely responds to the real-time temperature of the sample gas, and lacks a control technology that enables additional cooling for the sample gas or rapid discharge of the sample gas in accordance with the reference temperature. There was a problem of dropping.

For reference, related prior arts include Patent No. 10-2013-0131629, Patent No. 10-1637292, Patent No. 10-1080456, and Patent No. 10-1169485.

Accordingly, the present invention was devised to solve the problems as described above,

Samples waiting to be discharged so that the sample gas discharged by the gas analyzer can be precisely matched to the reference temperature and discharged by precisely controlling the cooling of the sample gas and the discharge of the sample gas. Equipped with a pneumatic temperature controller capable of precisely controlling and supplying compressed air for opening and closing a pneumatic valve to a pneumatic valve installed for supply of compressed air and discharge of sample gas used for vortex cooling of sample gas in response to the real-time temperature of the gas It is an object to provide a sample gas reflux device for a gas analyzer.

In order to achieve the above object, a sample gas reflux device for a gas analyzer having a pneumatic temperature controller according to the present invention,

According to the temperature of the sample gas discharged to the gas analyzer, the sample gas reflux device for a gas analyzer having a pneumatic temperature controller that controls the opening and closing operation of the first pneumatic valve for cooling the sample gas and the second pneumatic valve for discharging the sample gas, respectively. In,

The pneumatic temperature controller,

A temperature sensor provided in the discharge pipe connected to the gas analyzer to measure the temperature of the sample gas discharged in real time,

Supply line that supplies compressed air used to open and close the valve,

A first discharge line and a second discharge line for discharging compressed air through the first and second pneumatic valves, respectively.

A valve unit for controlling whether or not compressed air is discharged by opening and closing between the supply line and the first discharge line and the supply line and the second discharge line, respectively.

A reference temperature of the sample gas may be fixed and set, and a valve control unit that controls whether or not the valve unit discharges compressed air according to a difference in real-time temperature measured by the temperature sensor compared to the set reference temperature Is done.

And in the sample gas reflux device for a gas analyzer having a pneumatic temperature controller according to the present invention,

The valve unit includes a first opening and closing button for opening and closing between the supply line and the first discharge line, and a second opening and closing button for opening and closing between the supply line and the second discharge line,

The valve control unit includes a first push button and a second push button respectively corresponding to the first and second opening and closing buttons, and the first and second push buttons are the first and second according to the measured real-time temperature. 2 First control means for controlling the operation of the valve unit by pressing or releasing the opening / closing buttons respectively, and adjusting the distance between the opening / closing buttons and the push buttons by changing the position of the valve unit according to the set reference temperature It characterized in that it comprises a pneumatic temperature controller, characterized in that it comprises a second control means.

Furthermore, in the sample gas reflux device for a gas analyzer having a pneumatic temperature controller according to the present invention,

The valve control unit includes a temperature display plate with a scale,

The first control means includes a first pointer that rotates along the scale to display the real-time temperature of the sample gas, an operating plate having the push buttons at one end and rotating up and down at the other end, to measure the sample gas It includes a pressure rod to move up and down in accordance with the real-time temperature to rotate the first pointer and rotate up and down of the operating plate,

The second control means includes a second pointer capable of displaying and fixing a reference temperature of a sample gas by rotating along the scale, a rotating plate that is mounted on one side end and the other end is built up to rotate up and down. The two pointers are coupled to be rotatable together, but having a radially different radius in the circumferential direction based on the axis portion of the second pointer, and having a pressing outer circumferential surface contacting the rotating plate to rotate the rotating plate up and down according to the rotation of the second pointer. It characterized in that it comprises a pneumatic temperature controller, characterized in that it comprises a rotating cam to rotate.

In addition, in the sample gas reflux device for a gas analyzer having a pneumatic temperature controller according to the present invention,

The first control means, one side end includes a pressing plate for supporting the lower end of the pressure bar and the other end is built up and rotated up and down,

The temperature sensor includes a working rod capable of adjusting the left and right positions while vertically drawing in and out according to the real-time temperature of the sample gas measured at the lower portion of the pressing plate, and an adjusting bolt coupled to adjust the height of the upper and lower sides of the working rod. Is done.

Sample gas reflux device for a gas analyzer having a pneumatic temperature controller according to the present invention,

The reference temperature of the sample gas can be fixed and set, and a pneumatic temperature controller capable of precisely controlling the discharge of compressed air for opening and closing the pneumatic valve according to the difference between the set reference temperature and the real-time temperature of the sample gas is provided. , By accurately extracting the temperature of the sample gas to be extracted according to the reference temperature, it is possible to extract pure sample gas to increase the accuracy of analysis, etc.,

By introducing a valve control unit made of a mechanical operating structure according to the real-time temperature of the sample gas, it prevents malfunction or failure in advance,

Not only can the reference temperature be easily changed according to the type of gas, the purpose of analysis, etc., but also the valve unit is precisely opened and closed according to the changed reference temperature, and the sample gas exceeding the error range of the reference temperature is not automatically discharged. By blocking, you can prevent the occurrence of safety accidents,

Real-time temperature and set reference temperature are very easy to identify, and it is easy to set the zero point for each reference temperature, so it can be used universally for various types of gas extraction and analysis.

It has the effect of strengthening the filtering function of the sample gas and preventing clogging of the pipe due to the filtered foreign matter, and extracting and analyzing the sample gas in a uniform state using heat exchange through self-cleaning and vortex cooling.

1 is a front view of a sample gas reflux device for a gas analyzer according to the present invention.
Figure 2 is a view showing the connection structure of Figure 1;
Figure 3 is an internal structure of the compressed air supply according to the present invention.
4 is an internal structure diagram of a pneumatic temperature controller according to the present invention.
5 and 6 are sample photographs of a pneumatic temperature controller according to the present invention.
7 is an internal structure diagram of a filter tube according to the present invention.
8 is an internal structural view of a cooling tube according to the present invention.
9 is a plan view and a cross-sectional view for explaining the operation rod fixing means according to the present invention.

The present invention can be applied to a variety of changes and can have a variety of forms, the implementation (態 樣, aspect) (or embodiments) will be described in detail in the text. However, it is not intended to limit the present invention to a specific disclosure form, it should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

The same reference numbers in each drawing, especially the number of tens and ones, or the same number of tens, ones and alphabets indicate the members having the same or similar functions, and each of the drawings unless otherwise specified. The member indicated by the reference numeral can be understood as a member conforming to these standards.

In addition, in each drawing, the elements are exaggeratedly large (or thick) or smallly (or thinly) or simplified to express the size or thickness in consideration of convenience, etc., thereby limiting the scope of the present invention. It should not be.

The terminology used herein is only used to describe a specific embodiment (sun, 態 樣, aspect) (or embodiment), and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

 In this application, terms such as ~ include ~ or ~ consist of ~ are intended to designate the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and one or more other features. It should be understood that the existence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

~ 1 ~, ~ 2 ~, etc. described in this specification will be referred to only to distinguish that they are different components, and are not limited to the order in which they are manufactured, and the names in the detailed description and claims of the invention It may not match.

For convenience in describing a sample gas reflux device for a gas analyzer equipped with a pneumatic temperature controller according to the present invention, referring to FIGS. 1 and 4 with reference to FIGS. The direction is determined by specifying the direction in accordance with this standard unless otherwise specified in the detailed description and claims of the invention related to other drawings.

Hereinafter, a sample gas reflux device for a gas analyzer having a pneumatic temperature controller according to the present invention will be described with reference to the accompanying drawings.

The present invention is to control the opening and closing operation of the first pneumatic valve 43 for sample gas cooling and the second pneumatic valve 32 for sample gas cooling according to the temperature of the sample gas discharged to the gas analyzer (not shown). A sample gas reflux device for a gas analyzer having a temperature controller,

As shown in Figures 1 to 5, it is connected to a transport pipe (not shown) to which gas such as pyrolysis gasoline (py-gas) is transferred, and extract pipe (RP) for extracting sample gas and discharging it to a gas analyzer. It includes a compressed air supply 40 is installed the pneumatic temperature controller (PTC).

The extraction pipe (RP) is a mounting pipe (not shown) coupled to the upper connection part of the transport pipe, a filter tube 10 coupled to the upper portion of the mounting tube, and a cooling tube 20 coupled to the upper part of the filter tube 10 ) And the discharge pipe 30 coupled to the cooling pipe 20 and connected to the gas analyzer.

Although not shown in the figure, the mounting pipe is provided with a shut-off valve that blocks the discharge of sample gas from the transfer pipe.

The filter tube 10 is provided with a steam inlet 11 connected to a flow path of a sample gas at a lower end, and a cyclone generator 12 having a vortex forming blade 12a is installed at a lower inlet side of the flow path, On the upper part of the cyclone generator 12, a double cone member 13 having a smaller diameter is installed.

When the steam inlet 11 injects steam into the filter tube 10 when extracting sample gas, the sample gas in which the steam is mixed rises while forming a vortex by the cyclone generator 12, and the compound contained in the sample gas (tar , Oil and other heavy particles) do not block the flow path, and clean the extraction pipe (RP) through steam injection during non-operation.

The double cone member 13 causes the high-viscosity compound not to adhere to the inner wall of the filter tube 10 due to the difference in diameter, and falls directly to the transport pipe to be discharged.

In addition, the filter tube 10 is provided with a filter 14 on the upper outlet side of the flow path to filter and remove other foreign matter mixed in the sample gas.

Various cooling media may be used as the cooling pipe 20, and the cooling pipe 20 of the present invention uses vortex cooling of compressed air.

Specifically, the inlet side and the outlet side of the cooling tube 20 are respectively shielded by double partition walls 21a and 21b spaced up and down at predetermined intervals, and the upper and lower ends penetrate through the double partition walls 21a and 21b. The inner tube 22 for transporting the sample gas and the outer periphery of the inner tube 22 are spaced apart at predetermined intervals, and the upper end and the lower end pass through the inner partition walls 21a, and the outer tube 23 for passing through the vortex cooling is combined. ) Is installed, between the upper double partition (21a) (21b) and the lower double partition (21a) (21b), respectively, the inlet 24 and the outlet 25 for the supply and discharge of the cooling medium (extruded air) connected.

At this time, the present invention is provided with a vortex tube (vortex tube) in the inlet 24 to supply the compressed air used for opening and closing the pneumatic valve (43) (32) to the inlet (24) to achieve vortex cooling for the sample gas To lose.

Therefore, when the high-temperature sample gas rises on the inner tube 22, the vortex cooling of the sample gas is achieved through heat exchange with the compressed air that descends while forming the vortex on the outer tube 23.

The filtered and cooled sample gas reaches the reference temperature and is supplied to the gas analyzer through the discharge pipe 30 in a cooled state, wherein the supply of compressed air for vortex cooling and discharge of the sample gas are the pneumatic temperature controller (PTC ) For individual control.

Specifically, the present invention is provided with a first pneumatic valve (43) and a second pneumatic valve (32) to open and close operation with compressed air, respectively, when opening each pneumatic valve (43, 32) by the supply of compressed air, Compressed air is supplied to the outer tube 23 through the injection port 24, and the sample gas is discharged to the gas analyzer through the discharge part 31.

At this time, the first pneumatic valve 43 is connected to the pipe on the supply line 70 of the compressed air supply 40, and the second pneumatic valve 32 is connected to the pipe on the discharge portion 31 of the discharge pipe 30, , Each pneumatic valve 43, 32 operates open when compressed air is supplied, and closed when compressed air is not supplied.

The compressed air supply 40 is to supply compressed air used for vortex cooling and opening and closing of each pneumatic valve 43, 32 using a pneumatic temperature controller (PTC), and cooling pipe 20 of the extraction pipe (RP) ) It is provided in the case coupled to the outer surface.

The compressed air supply 40 includes a supply pipe 41 for supplying compressed air, and a pneumatic temperature controller (PTC) for receiving and receiving compressed air from the supply pipe 41 and controlling opening and closing of the pneumatic valves 43 and 32. Includes.

The supply pipe 41 is provided through the case, the inlet side is connected to the compressed air supply means, such as a compressor, the outlet side is connected to the inlet 24, more specifically to the vortex forming tube (24a), A first pneumatic valve 43 for controlling the discharge of compressed air is provided at the middle of the supply pipe 41, and a cross tee 44 is piped between the inlet side of the supply pipe 41 and the first pneumatic valve 43 Is connected to the supply line 70 is connected to one side of the cross tee 44, the branch pipe 45 is connected to the other side of the cross tee 44.

The supply line 70 connects between the supply pipe 41 and the valve unit 80, and the branch pipe 45 bypasses the first pneumatic valve 43 to connect the inlet side and the outlet side of the supply pipe 41. Connect.

Therefore, in the state in which the first pneumatic valve 43 is closed, the compressed air supplied to the supply pipe 41 is partially flowed into the supply line 70 by the cross tee 44, and the remaining portions are branch pipes 45. Flows to the outer tube 23 through

Compressed air supplied to the supply line 70 is used to open and close the first pneumatic valve 43 and the second pneumatic valve 32 according to the temperature of the sample gas before being discharged to the gas analyzer, and to the outer tube 23 The compressed air supplied directly forms a vortex by the vortex forming tube 24a, and is used for basic vortex cooling of the sample gas.

In addition, when the real-time temperature of the sample gas is higher than the reference temperature and additional cooling (that is, increasing the cooling strength) is required, the compressed air supplied to the supply line 70 by the pneumatic temperature controller (PTC) is the first pneumatic valve ( 43) to open the first pneumatic valve 43, the compressed air is discharged through the supply pipe 41 together with the branch pipe 45, additional cooling is performed for the sample gas flowing through the inner tube 22, The temperature of the sample gas waiting to be discharged can be reduced to a reference temperature.

Unillustrated reference numeral 46 is a needle valve that continuously discharges the compressed air discharged to the branch pipe 45 to a predetermined pressure, and unillustrated reference numeral 47 denotes the discharge pressure of the compressed air discharged to the inlet 24 It is a pressure gauge.

And the pneumatic temperature controller (PTC) for controlling the opening and closing operation of each supply valve (43, 32),

A temperature sensor 60 provided in the discharge pipe 30 connected to the gas analyzer to measure the temperature of the sample gas discharged in real time,

Supply line (70) for supplying compressed air used to open and close the valve,

A first discharge line 71 and a second discharge line 72 for discharging compressed air to the first and second pneumatic valves 43 and 32, respectively.

Valve unit 80 for controlling whether or not compressed air is discharged by opening and closing between the supply line 70 and the first discharge line 71 and the supply line 70 and the second discharge line 72, respectively.

It is possible to set and set the reference temperature of the sample gas, and the valve control to control whether the valve unit 80 discharges compressed air according to the difference between the set reference temperature and the real-time temperature measured by the temperature sensor 60 Unit 90 is included.

The pneumatic temperature controller (PTC) is provided as a separate housing 50 embedded in the case.

First, the supply line 70 has one end connected to the cross tee 44 and the other end connected to the valve unit 80.

The temperature sensor 60 is a type of thermocouple (thermocouple) temperature measuring instrument mounted on the discharge pipe 30 to detect and measure the temperature of the sample gas in real time,

The temperature sensor 60 is connected to the mounting hole 61a coupled to the housing 50 of the pneumatic temperature controller (PTC) through the sensing line 61, and the working rod 62 provided in the mounting hole 61a The real-time temperature of the sample gas is transmitted to the first control means through the in / out operation of the detailed description related to this.

The valve unit 80, between the supply line 70 and the first discharge line 71 between the first opening and closing button 81a, the supply line 70 and the second discharge line 72 It includes a second opening and closing button 82a to open and close,

The valve control unit 90 is provided with a first push button 94 and a second push button 93 corresponding to the first and second opening and closing buttons 81a and 82a, respectively, to measure the measured real-time temperature. Accordingly, the first and second push buttons 94 and 93 press the first and second open / close buttons 81a and 82a, respectively, and release the first control button to control the operation of the valve unit 80. Control means, a second control means for adjusting the distance between the opening and closing buttons 81a, 82a and push buttons 94, 93 by changing the position of the valve unit 80 according to the set reference temperature Includes.

The valve unit 80 is a pair of valve bodies having opening and closing buttons for opening and closing each flow path, and the first valve body 81 has one inlet pipe branched from the supply line 70 and a first discharge line. (71) is connected to control the discharge of compressed air to the first pneumatic valve (43), the second valve body (82), another inlet pipe branched from the supply line (70) and the second discharge line (72) This is connected to control the discharge of compressed air to the second pneumatic valve (32).

At this time, the first and second valve bodies 81 and 82 are reversed when the first and second opening and closing buttons 81a and 82a are pressed and released.

That is, the first valve body 81 is opened when the first opening / closing button 81a is pressed, and the compressed air of the supply line 70 is supplied to the first pneumatic valve 43 through the first discharge line 71. When the first pneumatic valve 43 is opened and the first opening / closing button 81a is released, the compressed air is not supplied to the first pneumatic valve 43 as the flow path is closed, so the first pneumatic valve 43 ) Works closed.

Conversely, the second valve body 82 is opened when the second opening / closing button 82a is not pressed, and the compressed air of the supply line 70 passes through the second discharge line 72 to the second pneumatic valve 32. When the second pneumatic valve 32 is supplied and opened and the second opening / closing button 82a is pressed, the compressed air is not supplied to the second pneumatic valve 32 as the flow path is closed, so that the second pneumatic valve 32 is supplied. Works closed.

And the valve control unit 90 includes a temperature display plate (not shown in the drawing) with a scale,

The first control means is provided with a first pointer (91) for displaying the real-time temperature of the sample gas by rotating along the scale, the push buttons (94) (93) at one end, and the other end is built up and rotated up and down It includes a working plate 92, and a pressing rod 96 that is moved up and down according to the real-time temperature of the sample gas to be measured to rotate the first pointer 91 and rotate up and down of the working plate 92.

The second control means is rotated along the scale, a second pointer 97 capable of displaying and fixing the reference temperature of the sample gas, the valve unit 80 is mounted at one end, and the other end is built up to rotate up and down. The rotating plate 98 and the second pointer 97 are combined to be rotatable together, but the radius is formed differently in the circumferential direction based on the axis portion of the second pointer 97, so as to contact the rotating plate 98. It includes a rotating cam (99) having a pressing outer peripheral surface (99a) to rotate the rotating plate 98 up and down in accordance with the rotation of the second pointer (97).

The temperature display plate is coupled to cover the valve control unit 90, and the scale on which the temperature is displayed is provided in a fan shape.

The first pointer 91 is built in the center of the line of the scale, and is rotated and displayed at a scale corresponding to the real-time temperature of the sample gas by physical pressing of the working rod 62 to be described later.

The operation plate 92 includes first and second push buttons 94 and 93 corresponding to the first and second opening and closing buttons 81a and 82a.

The first push button 94 is a support pipe 94a placed on the lower surface of the operation plate 92, a push rod 94b fitted to the support pipe 94a and capable of moving up and down, and the operation It is composed of a compression spring (94c) exerted to the pressing rod (94b) on the upper surface of the plate (92) to exert elastic force in the opposite direction of compression to elastically support the pressing rod (94b) upward,

The second push button 93 is composed of a bolt member that is screwed to the operation plate 92 and is adjustable in height.

Although not shown in the drawing, the operation plate 92 is provided with a torsion spring on the rotation shaft, and when an external pressure is not applied to the operation plate 92, the operation plate 92 is rotated downward to a predetermined angle by the elastic force of the torsion spring. Are forced to.

At this time, the push rod 94b of the first push button 94 is provided higher than the bolt member of the second push button 93.

The pressing rod 96 is provided to be raised and lowered from the lower side of the operation plate 92, is connected to the shaft portion of the first pointer 91, a rack, pinion structure,

When the pressure rod 96 rises, the first pointer 91 rotates toward high temperature, and at the same time, the pressure rod 96 pushes the operation plate 92 upwards, thereby causing the operation plate 92 to rotate upwards, resulting in the first, The second push button (94, 93) is moved closer to the first and second opening and closing buttons 81a and 82a,

Conversely, when the pressure rod 96 is lowered, the second pointer 97 rotates toward the low temperature, and at the same time, the operation plate 92 rotates downward, so that the first and second push buttons 94 and 93 are first and second. The second opening and closing buttons 81a and 82a move in opposite directions to move away.

Subsequently, in the second pointer 97, the shaft portion overlaps with the shaft portion of the first pointer 91, and the shaft portions of each pointer are connected to each other in an idling structure so that rotation interference of other pointers does not occur when each pointer is rotated. .

The second pointer 97 is coupled to extend from the shaft portion and has a lever (not shown) exposed to the front surface of the housing 50, so that the user holds the lever and rotates the second pointer 97 from side to side to sample The reference temperature of the gas can be determined.

The rotating plate 98 is provided to rotate up and down from the upper side of the operation plate 92, the first and second opening and closing buttons 81a and 82a at one end of the lower side of the rotating plate 98 are lower side. The valve unit 80 is mounted to face.

The pivoting plate 98 is connected to a tension spring 98c exerting elastic force in the compression direction to rotate the pivoting plate 98 downwardly at one end, and if an external pressure is not applied to the pivoting plate 98, the tensioning spring 98c ), The rotating plate 98 is forced to rotate downward.

Reference numeral 98b, which is not described, denotes a friction reducing roller provided at a portion where the pressurized outer peripheral surface 99a of the rotating plate 98 is in contact.

The rotary cam 99 is a kind of shaft plate that is integrally coupled to the shaft portion of the second pointer 97 and rotates with the second pointer 97,

The radius of the outer circumferential surface of the shaft plate is formed to be larger in one direction, thereby forming a pressurized outer circumferential surface 99a contacting the rotating plate 98.

That is, the pressing outer circumferential surface 99a of the rotary cam 99 has a longer radius from the other side (right side in the drawing) toward the circumferential direction (left side in the drawing).

Therefore, as the second pointer 97 rotates toward the high temperature by the lever, as the radius of the pressurized outer circumferential surface 99a in contact with the rotating plate 98 increases, the rotating plate 98 rotates upward, and thus the first and second The opening and closing buttons 81a and 82a move away from the first and second push buttons 94 and 93 and move away,

Conversely, as the second pointer 97 rotates toward the low temperature by the lever, as the radius of the pressurized outer peripheral surface 99a decreases, the first and second opening / closing buttons 81a and 82a rotate while the pivoting plate 98 rotates downward. The first and second push buttons 94 and 93 are moved toward each other to move closer.

In addition, the first control means includes a pressing plate 95 at which one end supports the lower end of the pressurizing rod 96 and the other end is built up and rotates up and down,

The temperature sensor 60 is a working rod 62 that is capable of adjusting the left and right positions while vertically pulling in and out according to the real-time temperature of the sample gas measured at the lower portion of the pressing plate 95, and the working rod 62 up and down. It includes an adjustment bolt 63 is coupled to be adjustable in height.

The pressing plate 95 is provided to rotate up and down between the pressing rod 96 and the working rod 62 (more precisely, the adjustment bolt 63).

The operating rod 62 is hydraulically raised and lowered according to a change in the fluid pressure of the bulb embedded in the mounting hole 61a of the sensing line 61 to rotate the pressing plate 95 up and down.

The adjusting bolt 63 is a member that directly contacts the lower surface of the pressing plate 95, and is used to adjust the height between the pressing plate 95 and the operating rod 62.

In addition, the housing 50 is provided with a guide groove 51 formed in a predetermined length to the left and right on the bottom surface, the operation rod 62 is fitted into the guide groove 51 so that the left and right positions can be adjusted.

Hereinafter, a control method of the pneumatic temperature controller (PTC) having the above-described configuration will be described in detail.

First, while the first and second pneumatic valves 43 and 32 are forcibly closed, the temperature of the sample gas cooled and discharged along the extraction pipe RP is measured by a separate temperature measuring instrument (thermocouple), and Adjusting the cooling strength so that the sample gas is cooled to a reference temperature suitable for gas analysis through the pressure adjustment of the valve 46 (that is, the flow rate and / or pressure of the compressed air discharged to the outer tube 23 through the branch pipe 45) (Adjust) to set.

In addition, when the temperature of the sample gas measured by the temperature sensor 60 is transmitted to the bulb embedded in the mounting port 61a through the sensing line 61, the working rod 62 while the fluid pressure in the bulb changes according to the measured temperature ) Rises by the corresponding pressure and rotates the pressing plate 95 upward, and accordingly, the first pointer 91 rotates at a specific temperature scale.

At this time, the actual temperature (reference temperature) in the discharge pipe 30 measured by a separate temperature meter is compared with the temperature indicated by the first pointer 91.

In addition, when the actual temperature of the temperature measuring device and the display temperature of the first pointer 91 are different, the inclined structure of the pressing plate 95 that is forced to rotate downward when the operating rod 62 is first positioned to the left and right of the guide groove 51 Due to the height of the adjusting bolt 63 contacting the pressing plate 95 is changed, the angle of the pressing plate 95 is changed, and the actual temperature of the temperature measuring device and the display temperature of the second pointer 97 reach an approximate value. When the height of the adjusting bolt 63 is adjusted to finely adjust the angle of the pressing plate 95, the zero point setting of the measured temperature through the first pointer 91 is completed.

Subsequently, when the user holds the lever according to the type of gas and the like and rotates the second pointer 97 to the scale position of the reference temperature, the rotation plate 98 rotates up and down by the rotating cam 99 rotating together to change the angle. Lose,

At this time, the opening and closing buttons 81a, 82a and the push buttons 94, 93 are all too close by the up and down rotation of the pivoting plate 98 while the first and second pointers 91 and 97 coincide. If it is pressed or, on the contrary, it is too far and the operation plate 92 is rotated upward, but all are not pressed, the bolt 97a fixing the second pointer 97 to the rotating cam 99 is loosened to release the second against the rotating cam 99. After re-adjusting the zero point by changing the fixed angle of the pointer 97, the second pointer 97 is again rotated to the scale of the reference temperature with a lever to fix and set the reference temperature.

At this time, the zero point of the second pointer 97 is adjusted so that the first opening / closing button 81a and the first push button 94 are spaced apart at predetermined intervals while the first and second pointers 91 and 97 coincide. The zero point adjustment of the pointer 97 is performed, and an interval between the first opening / closing button 81a and the first push button 94 becomes a temperature allowable range of the sample gas measured compared to the reference temperature.

That is, as the distance between the first opening / closing button 81a and the first push button 94 increases, the allowable range of the display temperature of the first pointer 91 to the reference temperature of the second pointer 97 increases.

Conversely, the closer the distance between the first open / close button 81a and the second push button 93, the smaller the display temperature allowable range of the second pointer 97 compared to the reference temperature of the second pointer 97.

In addition, the distance between the second open / close button 82a can be adjusted by tightening or releasing the second push-button 93, wherein the gap between the second open / close button 82a and the second push-button 93 is the sample gas. It becomes the limiting temperature to block the discharge.

That is, as the distance between the second opening / closing button 82a and the second pushbutton 93 increases, the limit temperature for discharging the sample gas increases.

Conversely, the closer the gap between the second opening / closing button 82a and the second pressing button 93, the lower the temperature limit allowing the sample gas to discharge.

When this zero point adjustment and setting of the reference temperature are completed, the sample gas reflux device for the gas analyzer is operated.

And for example, assuming that the reference temperature is 20 ° C, the allowable temperature range of the sample gas is ± 0.5 ° C, and the discharge limit temperature of the sample gas is ± 17 ° C,

When the sample gas reflux device for the gas analyzer is operated, the sample gas discharged through the extraction pipe RP as the compressed air is injected into the outer tube 23 through the branch pipe 45 as described above is the first set reference It is cooled to a temperature (20 ° C), and in this state, the compressed air is supplied to the second pneumatic valve 32 because the second push button 93 does not press the second open / close button 82a when the reference temperature and the measured temperature match. As the discharge portion 31 is opened, the sample gas is discharged to the gas analyzer.

And if the temperature of the sample gas during operation is within 20 ± 0.5 ° C, the pneumatic temperature controller (PTC) does not operate separately, and discharge of the sample gas is normally performed.

And when the temperature of the sample gas rises between 20.5 ~ 21 ℃, as the working rod 62 is drawn out by the elevated temperature, the upward rotation of the pressing plate 95 constituting the first valve control unit 90, the pressing rod ( 96), the first push button 94 presses the first opening / closing button 81a by interlocking upward movement of the operation plate 92, and the first valve body 81 is opened,

Due to this, the compressed air of the supply line 70 is supplied to the first pneumatic valve 43, and the first pneumatic valve 43 is opened.

When the first pneumatic valve 43 is opened, a part of compressed air branched from the cross tee 44 is supplied to the inlet 24 through the first pneumatic valve 43, and at this time, the branch pipe through the needle valve 46 Compressed air flowing through the (45) maintains the initial set pressure, and eventually, as the flow rate and pressure of the compressed air supplied to the outer tube 23 through the vortex forming tube 24a of the inlet 24 increase, Vortex cooling for the sample gas discharged to the tube 22 becomes stronger, the sample gas is cooled to the allowable discharge temperature range,

When the sample gas is cooled to the allowable temperature range, the supply of compressed air to the first pneumatic valve 43 is blocked as the valve control unit 90 operates in the opposite direction, thereby increasing the effect of vortex cooling by additional inflow of compressed air. Disappears.

If the temperature of the sample gas does not cool and continues to rise and exceed 37 ° C even with vortex cooling through the opening of the first pneumatic valve 43, the valve control as the working rod 62 is drawn out by the rising temperature While the upward rotation of the pressing plate 95 constituting the unit 90, the rise of the pressing rod 96, and the upward rotation of the operation plate 92 continue to interlock, the second push button 93 is the second opening and closing button 82a ) To close the second valve body 82,

Due to this, since the compressed air of the supply line 70 is not supplied to the second pneumatic valve 32, the discharge part 31 is blocked, and the sample gas is not discharged to the gas analyzer, so that the gas analyzer is generated by discharging the sample gas at a high temperature. Prevents the occurrence of breakdowns or safety accidents.

And when the temperature of the sample gas falls again below 37 ° C, the supply of compressed air to the second pneumatic valve 32 resumes as the valve control unit 90 operates in the opposite direction, and cooling and discharge of the sample gas continue. .

Subsequently, when the temperature of the sample gas falls within the allowable temperature range of the reference temperature, the supply of compressed air to the first pneumatic valve 43 is blocked while the first push button 94 is separated from the first open / close button 81a, and the compressed air is blocked. As the effect of increasing the vortex cooling due to the additional flow disappears, the cooling is maintained only in the initially set state.

The present invention can be adjusted to maintain the temperature of the sample gas to the reference temperature through the pneumatic temperature controller (PTC) of the above configuration,

In particular, the pneumatic temperature controller (PTC) is a completely non-electrically consuming mechanical operation, so it is not only less likely to cause trouble, but also requires little maintenance and repair, making it convenient. Even if an emergency such as a power outage occurs, the pneumatic temperature controller (PTC) automatically blocks the discharge of sample gas to provide the effect of preventing the occurrence of safety accidents.

Meanwhile, the present invention adjusts the zero point of the pointer by adjusting the left and right positions of the working rod 62 of the mounting hole 61a. At this time, the support of the mounting hole 61 is unstable because the thickness of the bottom surface of the housing 50 is thin. It can, and the width and width of the guide groove 51 can not exactly fit the outer diameter of the mounting hole 6, the position or angle of the working rod 62 may be distorted.

Accordingly, the present invention has introduced a fixing means capable of fixing the pressure through the injection of compressed air.

Referring to Figure 9, the fixing means of the present invention,

Further comprising a mounting block 52 having the guide groove 51,

Seating groove (52a) formed concave along the inner peripheral surface of the guide groove (51) of the mounting block,

As a ring-type member made of a stretchable material, it has an air cell (53a) through which compressed air is injected, and a pressurized fixing ring (53) fitted to the seating groove (52a) to surround the outer circumferential surface of the working rod (62) ),

It is connected to one side of the pressure fixing ring 53, including a tube portion (53b) that can inject air into the air cell (53a) or discharge the air of the air cell (53a),

When compressed air is injected into the pressure fixing ring 53, the pressure fixing ring 53 expands and presses the outer circumferential surface of the working rod 62 so that the working rod 62 is fixed to the guide groove 51, and the pressure fixing ring When compressed air is discharged from (53), the pressure retaining ring (53) contracts and the pressure of the working rod (62) is released, so that the working rod (62) can be adjusted in position in the guide groove (51).

The pressing retaining ring 53 has a thickness smaller than the cross-sectional area of the seating groove 52a when contracted, and a thickness greater than the cross-sectional area of the seating groove 52a when expanded, so that the hollow part fitted with the working rod 62 in the contracted state The operating rod 62 can be freely adjusted by expanding widely, and the working rod 62 is pressed on the guide groove 51 by pressing the working rod 62 while the hollow portion fitted with the working rod 62 becomes narrow in the expanded state. It is fixed without moving from side to side.

The tube portion (53b) is in communication with the air cell (53a) at one end and the other end is connected to the supply pipe (41), through the opening and closing of a lever (not shown) pressurized fixed ring 53 to inject compressed air or Can be taken out.

The fixing means of the present invention, after adjusting the position of the operating rod 62 and injecting compressed air into the pressure fixing ring 53, the pressure fixing ring expands to hold the left and right sides of the operating rod to prevent the working rod from moving left and right, At this time, the pressure retaining ring cannot expand in the longitudinal direction of the working rod, so it does not interfere with the withdrawal of the working rod.

In addition, when the position of the pressure retaining ring is required, when the compressed air is pulled out of the pressure retaining ring, the pressure retaining ring contracts and does not interfere with the movement of the working rod.

Further, although not shown in the drawing, the pressure fixing ring has a predetermined length in the longitudinal direction of the working rod, and a plurality of guide portions protruding or concave from the inner circumferential surface of the hollow portion (that is, the surface contacting the working rod) are arranged along the inner circumferential surface of the hollow portion, It is possible to increase the left and right fixing force to the working rod by the guide portion, so as not to interfere with the vertical movement of the working rod.

In the above description, the sample gas reflux device for a gas analyzer equipped with a pneumatic temperature controller has been mainly described with reference to the accompanying drawings, but the present invention is capable of various modifications, changes, and substitutions by those skilled in the art. Modifications and substitutions should be construed as falling within the protection scope of the present invention.

RP: Extraction piping PTC: Pneumatic temperature controller
10: filter tube 20: cooling tube
30: discharge pipe 40: compressed air supply
50: housing 60: temperature sensor
70: supply line 80: valve unit
90: valve control unit

Claims (4)

According to the temperature of the sample gas discharged to the gas analyzer, the sample gas reflux device for a gas analyzer having a pneumatic temperature controller that controls opening and closing operations of the first pneumatic valve for cooling the sample gas and the second pneumatic valve for discharging the sample gas, respectively. In,
The pneumatic temperature controller,
A temperature sensor provided in the discharge pipe connected to the gas analyzer to measure the temperature of the sample gas discharged in real time,
Supply line that supplies compressed air used to open and close the valve,
A first discharge line and a second discharge line for discharging compressed air through the first and second pneumatic valves, respectively.
A valve unit for controlling whether or not compressed air is discharged by opening and closing between the supply line and the first discharge line and the supply line and the second discharge line, respectively.
It is possible to set the reference temperature of the sample gas fixed, and includes a valve control unit for controlling whether the compressed air is discharged from the valve unit according to the difference between the set reference temperature and the real-time temperature measured by the temperature sensor.
The valve unit includes a first opening and closing button for opening and closing between the supply line and the first discharge line, and a second opening and closing button for opening and closing between the supply line and the second discharge line,
The valve control unit is provided with a first push button and a second push button corresponding to the first and second opening and closing buttons, respectively, and the first and second push buttons are the first and second according to the measured real-time temperature. 2 First control means for controlling the operation of the valve unit by pressing or releasing the opening / closing buttons, respectively, and adjusting the distance between the opening / closing buttons and the push buttons by changing the position of the valve unit according to the set reference temperature Sample gas reflux device for a gas analyzer having a pneumatic temperature controller, characterized in that it comprises a second control means.
delete According to claim 1,
The valve control unit includes a temperature display plate with a scale,
The first control means includes a first pointer for displaying the real-time temperature of the sample gas by rotating along the scale, an operating plate having the push buttons at one end and rotating up and down at the other end, to measure the sample gas It includes a pressure rod to move up and down in accordance with the real-time temperature to rotate the first pointer and rotate up and down of the operating plate,
The second control means includes a second pointer capable of displaying and fixing a reference temperature of a sample gas by rotating along the scale, a rotating plate that is mounted on one side end, and the other end is built up to rotate up and down. 2 The pointers are combined to be rotatable together, but a radially different radius is formed in the circumferential direction based on the axis portion of the second pointer, and a pressing outer circumferential surface contacting the rotating plate is provided so that the rotating plate is moved up and down according to the rotation of the second pointer. Sample gas reflux device for a gas analyzer with a pneumatic temperature controller, characterized in that it comprises a rotating cam to rotate.
The method of claim 3,
The first control means, one side end includes a pressing plate for supporting the lower end of the pressure bar and the other end is built up and rotated up and down,
The temperature sensor includes a working rod capable of adjusting the left and right positions while vertically drawing in and out according to the real-time temperature of the sample gas measured at the lower portion of the pressing plate, and an adjusting bolt coupled to adjust the height up and down at the working rod. Sample gas reflux device for a gas analyzer equipped with a pneumatic temperature controller.

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