JPH09243414A - Sensor attaching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely attach/remove a sensor corresponding by to a change in status at a site by fixing the sensor in a cylinder having a flange and closed at its tip so as not to contact the surface of the sensor with anything and attaching to a machine or a pipe. SOLUTION: An insertion threaded part 42 of a fix-receiving ring 40 is screwed into the opening end threaded part 52 of a cylinder 50, and the tapered face 32 of a fastening ring 30 is inserted into the inner tapered face 44 of the ring 40. Then, a fastening screw 20 is passed through a measuring element of a sensor, the element 10 is passed through a through hole 34 of the ring 30 and inserted into the ring 40 and the cylinder 50, and the screw 20 is engaged with the threaded part 46 of the ring 40 for fastening, whereby the ring 30 is pressed against the ring 40 by the screw 20 so that the element 10 is fixed to the cylinder 50. With this cylinder 50 inserted into a measuring element inlet for a pipe 80, a flange 54 of the cylinder 50 overlies on an inverted tapered flange 82 at the inlet of the pipe 80, so that the overlapping parts are fastened by a ferrule metallic band 70 to fix the cylinder 50 to the pipe 80.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a tank, manufacturing equipment,
This relates to a fixture for mounting various measuring elements installed in a piping line, etc., especially when installing the measuring element itself directly inside a tank, manufacturing equipment, piping line, etc. causes problems in manufacturing control. The present invention relates to a mounting tool when the measuring element is not directly connected and is mounted via a mounting tool.

[0002]

2. Description of the Related Art Pressure, temperature, flow rate, concentration, pH, color, viscosity, etc. are measured in processing equipment in various industries, piping equipment in manufacturing lines, tanks, supply equipment and lines for steam, water, air, etc. However, it is used as basic data for process control. The present invention particularly relates to a technique for connecting a measuring element for measuring temperature and viscosity, and conventionally, the measuring element was fixed at its base by a screw, a flange, a ferrule or the like. Conventionally, the attached measuring element measures the fluid to be measured that is in direct contact with the surface of the element. However, due to the development of industry in recent years, it has come to be avoided that the fluid to be measured comes into direct contact with the element surface due to the quality control of processed products and facility control. In order to achieve the purpose of measurement without directly contacting such a measuring element with the fluid to be measured, the mounting of the measuring element has been devised.

The invention of Japanese Patent Laid-Open No. 7-146263, "Method of estimating fouling coefficient of heat exchanger", relates to a method of predicting fouling of a heat exchanger without stopping operation, and a heating heater and a temperature measuring element. The fouling evaluation tube composed of is arranged in the heat exchanger line, and the fouling is estimated by the evaluation tube. In this invention, a heater is built in the evaluation tube, and a temperature measuring element is arranged in the evaluation tube. In other words, if dirt adheres to the surface of the temperature measuring element, an error will occur in the measurement.Therefore, there is a hole for element placement in the evaluation tube so that the temperature measuring element can be placed in the evaluation tube. Insert the element here. It is a thing.

2. The invention of Japanese Patent Publication No. 7-69284, "Gas measuring device", has a filter for the gas to be measured introduced to the gas sensor, and the dew condensation water due to the contact between the gas to be measured and the sensor and the drainage. It is configured to be able to discharge, etc., and a heat pipe is installed in the filter part so that hot and humid gas is not guided to the gas sensor and water is separated, and the water is received by the drain pan. It is a device designed to remove obstacles. Although the sensor is in direct contact with the gas, it is equipped with a device to remove the gas obstacle in advance to protect the sensor.

The invention of 3, Japanese Patent Publication No. 7-78482 "Enzyme Sensor" relates to an enzyme sensor, which is not directly related to the present invention, but the enzyme sensor is arranged in a protective tube and the enzyme sensor is attached. This is to prevent damage to the sensor part due to work during removal or removal.

[0006]

As described in the above-mentioned prior art, the method of attaching the measuring element is provided with a protective tube or a hole for protecting the measuring element in advance according to each purpose. . In these prior arts, the device design is such that the positional relationship of the measuring elements in the manufacturing facility is clear, or the measuring elements are designed to be connected to a predetermined location. Therefore, when a highly versatile rod-shaped element such as the measuring element of the present invention is individually protected or the measuring form is changed, a separate technique is required. Since the reference 1 has the evaluation tube of the structure in which the rod-shaped element is not brought into direct contact with the fluid to be measured, such a structure is designed in advance in a predetermined form, and once set, The layout of the measuring element cannot be changed. Reference 2 is for protecting the sensor, but this can not be done unless the arrangement of the filter part and the sensor is designed in advance, and it is the structure of the sensor including the filter part. There is no versatility. Reference 3 protects the sensor itself, and the protective tube is a part of the sensor, and does not have a structure that can be attached or detached separately.

[0007]

According to the present invention, the surface of the measuring element is not exposed to the fluid to be measured without changing the existing line or equipment of the existing element or the like, and without changing the design or modification of the connection port. The purpose of the present invention is to provide a device that can be contacted to perform measurement, and its purpose is to be able to freely attach and detach it in response to changes in the situation at the site. The configuration for achieving this purpose is to install the sensor (measuring element) in equipment or piping, etc., to fix the sensor inserted in the sensor mounting opening of the equipment or piping. For sensor mounting in which a sensor is fixed in a cylinder whose front end is closed by using a fixing member so that the sensor surface does not contact the inner surface of the cylinder or makes a smooth contact. It is an instrument. The fixing member has a structure in which the tightening screw and the tightening ring are inserted into the fixed receiving ring.After inserting each member into the measuring element and assembling, the tightening screw pushes the tightening ring downward, and the tightening ring taper. And clamped by the taper in the fixed receiving ring, fixing the measuring element itself. A method for inserting and fixing such a measuring element inserted into and fixed to the cylindrical body by a fixing member into a sensor mounting opening portion of a device or a pipe is a ferrule structure (a flange formed of a taper collar by a metal band is used). Connection device for fixing), a flange structure, or a screw-in structure, and other known connection fixing methods can be adopted. Further, the inner surface of the cylinder may be brought into smooth contact with the measuring element.

In the structure added to the above structure of the present invention, the cylindrical body for accommodating the measuring element is formed so as to be tapered from the body portion with respect to the tip direction thereof, and a good thermal conductor is provided between the sensor and the inner surface of the cylindrical body. By incorporating a metal ring, the heat transfer between the sensor and the inner surface of the cylinder is improved. The metal ring may be made of copper, gold, silver, or any other metal. In addition to the metal ring, it is structurally possible to incorporate liquid substances such as alcohol and mercury, and powders such as ceramic powders and metal powders, but the liquids and powders interfere with the loading and unloading of the measuring element. Not the preferred method. The metal ring may be cylindrical, but if it has an outer taper shape that matches the inner surface taper of the cylindrical body, there is an advantage that the adhesion between the surface of the measuring element and the metal ring and the cylindrical body can be improved to improve heat transfer. By using the metal ring as the cushioning material, it is possible to avoid damage to the element due to the influence of vibration of the cylinder.

Another object of the present invention is to change the method of contact between the fluid to be measured and the cylinder in accordance with the property of the fluid to be measured, and to set the cylinder center line to the bottom surface of the flange of the cylinder. The purpose can be achieved by inclining. That is, when the axis of the tubular body is inclined with respect to the bottom surface of the flange portion of the tubular body, the mounting angle of the tubular portion with respect to the existing mounting portion has a width, and the fluid to be measured can be matched with the property of the fluid to be measured. The contact method of the cylinders can be changed. As a result, the angle can be changed even if the conventional element is used as it is, and the range of usage of the measuring element is widened. The inclination angle can be freely set within the range where the cylinder can be installed, and the cylinder is manufactured according to it.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded view showing an embodiment of the measuring element of the present invention. In addition, here, an example in which a metal ring as shown in FIG. 3 is not used is shown. First, the insertion screw portion 42 of the fixed receiving ring 40 of the measuring element is screwed into the open end screw portion 52 of the tubular body 50, and the tapered surface 32 of the tightening ring 30 is inserted into the inner tapered portion 44 of the fixed receiving ring 40 of the measuring element. Then, the tightening screw 20 is inserted into the measuring element 10, and further inserted into the through hole 34 of the tightening ring 30,
Further, by inserting into the fixed receiving ring 40 and the cylindrical body 50,
When the tightening screw 20 is engaged with the screw portion 46 of the fixed receiving ring 40 and tightened, the tightening screw 20 presses the tightening ring 30 against the fixed receiving ring 40, and the taper structure tightens and fixes the measuring element 10. To do. The tubular body 50 has a taper collar portion 54, and overlaps with the reverse taper collar portion 82 of the measuring element mounting port portion in the pipe 80 through the packing 60 to form a taper between the collar portion 82 and the taper collar portion 54. Ferrule metal band 70 with matching contrasting internal taper structure
Fixed by

FIG. 2 is a perspective view of the ferrule metal band 70. The inner surface has upper and lower tapers 73 and 74 so that the taper 82 on the flange portion on the mounting opening side and the taper collar portion 54 on the cylindrical body can be simultaneously tightened. I am doing it. And the ferrule metal band 70 is a symmetrical metal band 71,
It is composed of two of 72. This metal band is configured to tighten one round of the ferrule, one end of each of the metal bands 71 and 72 is provided with a hinge 75, and the other end is formed by combining the metal bands 71 and 72 with a bolt 78 and a nut 79. Tightening part 76 so that it can be tightened,
77 is projected. Thus, one of the advantages of using the attachment device is the simplicity and speed of the attachment work. That is, it is also an advantage that the measuring element can be replaced without operating the ferrule when the measuring element fails, but in order to change the measuring conditions according to the fluid, the structure of the cylinder or The ferrule structure can be easily used when it is desired to change the cylindrical body to one having a different inclination angle in accordance with the condition of the fluid or the like. In addition,
The tightening member of the ferrule can be changed to a known free structure by using a bolt and nut, a thumbscrew, or fixing by spring pressure. Also, the cylinder 5
The fixing method of the measuring element in the pipe 80 of No. 0 to the mounting opening portion 86 is not limited to the ferrule, and may be a flange structure or any other known connection method. .

FIG. 3 is a cross-sectional view showing a connection state between the cylindrical body 50 and the measuring element 10 when the metal ring 58 is inserted into the measuring element and housed in the cylindrical body. In the preferred embodiment, the metal ring 58 has a bilaterally symmetrical taper structure so as to come into contact with the inner surface of the cylindrical body 50 and the outer surface of the metal ring 58 as shown in the figure, but it may be a simple cylindrical body. It is also possible to insert an elastic member and the like from the opening side so as to fix the metal ring 58, but it is preferable to make it movable so that the measuring element 10 is not destroyed.

FIG. 4 shows a cylindrical center line 57 with respect to the bottom surface 55 of the tapered flange portion 54 of the cylindrical body 50 which is joined to the reverse tapered flange portion 82 of the measuring element mounting port through the packing 60.
It is a figure which shows the example which is inclined. The cylindrical center line 57 is
The bottom surface 55 of the tapered collar portion 54 intersects with the flowing direction of the fluid at an acute angle. Bottom 5 of taper collar 54
5 is substantially parallel to the centerline 84 of the pipe 80, and
The tubular body centerline 57 also intersects the centerline 84 of the pipe 80 at a sharp angle with respect to the fluid flow direction. It should be noted that the surface of the cylindrical body 50 may be configured to be smooth with respect to the flow of fluid, and the arrangement angle of the center line of the cylindrical body may be
It can be set freely. Further, in this embodiment, the center line 57 of the cylindrical body 50 is inclined, but since the measuring element 10 itself can be arranged straight along the center line 57 of the cylindrical body, it is not necessary to change the element structure. Absent. Also, in the example of FIG. 4, since the same mounting port as in the case of vertically mounting the center line 57 of the tubular body 50 to the measuring element mounting port portion 86 of the pipe as shown in FIG. 1 can be used, no line modification work is required. Instead, it is possible to mount the measuring element at different angles. As shown in FIG. 4, the center line 57 of the cylinder is replaced with the center line 8 of the pipe.
By inclining at an acute angle with respect to the flow direction of 4, it is possible to prevent the solid component of the fluid from adhering to the surface of the tubular body 50 and to prevent the generation of a scale that becomes a hotbed of bacteria.

FIG. 5 shows a structure in which the inner surface of the measuring element mounting port portion 86 of the pipe and the outer surface of the barrel portion 56 of the cylindrical body are joined to each other and there is no gap, and the fluid convection pocket is eliminated. It is an intention.

[0015]

By using the mounting tool according to the first aspect of the present invention, it is possible to remove only the measuring element and replace it with another measuring element when the measuring element fails. This replacement work is possible without stopping the line. Therefore, the replacement work can be performed without affecting the productivity of the product. Further, the measuring element is housed in the cylinder, and therefore, the measuring element itself does not come into contact with the cleaning liquid or the fluid to be measured, so that the measuring ability on the surface of the measuring element does not change and the life of the measuring element does not change. Can be lengthened. In particular, in the past, since the measuring element was brought into direct contact with the fluid to be measured, if stubborn dirt adhered to the measuring element, the measuring element was removed and washed by hand. It is possible to completely eliminate the items that were damaged by careless handling. Further, it is possible to eliminate the change in the measuring element capability due to the occurrence of scratches on the measuring element surface. Conventionally, the measuring element was in direct contact with the fluid to be measured, so the measurement element surface may be contaminated by the solid content of the fluid to be measured, causing measurement errors, or if this contamination is difficult to clean. However, the invention of claim 1 can solve the above problems by a simple method of replacing the cylinder. Further, in the invention of claim 1, it is a principle that the measuring element is arranged so as not to come into contact with the cylindrical body, but this is to prevent the measuring element from being damaged by vibration of the cylindrical body. Further, if the inner surface of the cylinder comes into contact with the measuring element smoothly, the same effect can be expected.

Next, by examining the structure of the cylinder according to the second aspect of the present invention, it becomes possible to secure the cleaning effect of the cleaning liquid, and it is possible to obtain the effect of preventing the generation of scales that become a hotbed of bacteria. Was given. Further, when quickness is required for the measuring speed of the measuring element, heat transfer can be improved by inserting a metal ring between the measuring element and the cylindrical body. This metal ring does not fix the measuring element and the cylinder, but moves freely inside, and vibrations of the cylinder are also buffered by the movement of the metal ring. Since this structure prevents a decrease in measurement speed, it is not necessary to change the control index based on the conventional measurement value used when exposing the conventional measurement element to the fluid.

According to the third aspect of the invention, when it is desired to change the structure of the measuring part or the element insertion angle in accordance with the property of the fluid to be measured, the line can be stopped, but it can be replaced quickly and various structures can be obtained. Can be tested, and the result can be obtained without changing the structure of the measuring element as in the past.

[Brief description of drawings]

FIG. 1 is an exploded view showing an embodiment of a measuring element of the present invention.

FIG. 2 is a perspective view of a ferrule metal band.

FIG. 3 is a cross-sectional view showing a connection state when a metal ring is inserted into a measuring element and housed in a cylindrical body.

FIG. 4 is a cross-sectional view showing an embodiment in which the center line of the cylinder is inclined with respect to the bottom surface of the tapered flange portion of the cylinder.

FIG. 5 is a cross-sectional view showing a structure in which the inner surface of the mounting port of the pipe and the outer surface of the barrel portion are joined together, and there is no gap.

[Explanation of symbols]

 10 Measuring element 20 Tightening screw 30 Tightening ring 40 Fixing receiving ring 50 Cylindrical body 54 Tapered flange 58 Metal ring 60 Packing 70 Ferrule metal band 80 Piping 86 Measuring element mounting port

Claims (3)

[Claims] 1. When installing a sensor on a device, a pipe or the like, the tip having a brim portion for connection with the sensor mounting port is closed in order to fix the sensor to be inserted into the sensor mounting port of the device or the piping. A sensor mounting device in which a sensor is fixed in a fixed cylinder so that the sensor surface does not contact or smoothly contacts the inner surface of the cylinder. 2. The cylindrical body is formed so as to be tapered from the body portion in the direction of the tip of the cylindrical body, and in order to improve heat transfer between the sensor and the inner surface of the cylindrical body, it is provided between the sensor and the inner surface of the cylindrical body. The sensor mounting device according to claim 1, wherein a metal ring of a good thermal conductor is incorporated. 3. The sensor mounting instrument according to claim 1, wherein the center line of the cylinder is inclined with respect to the bottom surface of the flange portion of the cylinder.