JP2008281450A - Temperature-pressure measuring device and installing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature-pressure measuring device capable of improving precision of temperature measuring by securing a heat absorption amount of a measured fluid and preventing permanent deforming of a spring of a check valve with a simple constitution, and to provide its installing device. <P>SOLUTION: A coil spring 50 is arranged at the circumference of a valve sleeve 40 so that the effective service length of a protection tube 30 is long, and a temperature sensing part 23 is immersed up to a deep position of a storing member of the fluid, so an absorption amount needed for accurate measuring can be secured. A locking ring 60 becomes a stopper of the valve sleeve 40 so that a compression amount of the coil spring 50 is limited within the range of a stroke of the valve sleeve 40 and generation of buckling and permanent deformation of the coil spring 50 can be prevented. Furthermore, while the opening part for introducing the measured fluid is constituted with the tip part 30B of the protection tube 30, the locking ring 60 is used both for locking the coil spring 50 and for stopping the valve sleeve 40 to thereby simplify the constitution. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a temperature / pressure measuring device for measuring the temperature and pressure of a fluid to be measured, and an attachment device for attaching a temperature / pressure gauge to a container or piping containing the fluid to be measured.

In recent years, a temperature / pressure gauge has been developed that combines both a pressure gauge for measuring fluid pressure such as gas or liquid in a container or piping and a thermometer for measuring the temperature of the fluid (Patent Document 1 and Patent Document 2).
These temperature / pressure gauges have a fluid contact rod in which a temperature sensing unit and a pressure introducing unit are integrated to contact a fluid to be measured. This fluid contact rod is inserted into a protective tube fixed to an attachment port such as a container or piping containing the fluid to be measured, and is fixed to the protective tube with a screw or the like. Here, the protective pipe is provided with a check valve that restricts the flow of the fluid to be measured from the pipe or the like when the temperature / pressure gauge is removed from the protective pipe during maintenance or the like.

  The protective tube in Patent Document 1 has a cap at the tip of the protective tube opposite to the side where the fluid contact rod is inserted. Further, a bottomed cylindrical valve into which a fluid contact rod is inserted is inserted into the protective tube of Patent Document 1. This valve is biased by a coil spring disposed between the bottom of the valve and the cap, and is formed on the side surface of the cap when the coil spring is compressed by being pressed by a fluid contact rod inserted into the valve. A fluid to be measured is introduced into the protective tube from the formed through hole. The fluid to be measured introduced into the protective tube passes through the flow path between the valve and the inner wall of the protective tube, and the through hole formed in the end of the valve on the proximal end side of the protective tube, to the fluid contact rod. Contact. On the other hand, when the fluid contact rod is removed from the protective tube, the flange provided on the outer periphery of the valve is pushed back and locked to the step portion of the inner wall of the protective tube, thereby blocking the flow path.

  Further, the protective tube in Patent Document 2 has a check valve means at the tip of the protective tube opposite to the side where the fluid contact rod is inserted. When the fluid contact rod is inserted into the protective tube, the valve member is pushed by the rod at the tip of the fluid contact rod, and the fluid to be measured is introduced into the protective tube to contact the fluid contact rod. On the other hand, when the fluid contact rod is removed from the protective tube, the valve member is pushed back by the spring provided in the check valve means, and the fluid introduction opening is blocked.

Utility model registration No. 3121723 JP 2003-322579 A

However, in any of the configurations related to the protective tube and the check valve as described above, the members and springs constituting the check valve are arranged on the front side in the insertion direction of the fluid contact rod. The length of insertion of the fluid contact rod into the protective tube is shortened by the length, and the amount of heat absorbed from the fluid to be measured is reduced. Thereby, the precision of temperature measurement will fall.
For example, in Patent Document 2, since the valve member pressed by the rod at the tip of the fluid contact rod and the valve chamber member into which the valve member is inserted are respectively disposed at the tip of the protective tube, the fluid contact rod The length of insertion into the protective tube is shortened. In addition, since there exists a possibility that the intensity | strength to fluid resistance may fall when a protective tube becomes long, it is difficult to ensure the amount of heat absorption by lengthening a protective tube.

On the other hand, in Patent Document 1, since the valve is not arranged on the tip side of the fluid contact rod, the fluid contact rod can be inserted into the protective tube longer than the configuration of Patent Document 2, but the length of the coil spring provided in the cap Therefore, since the insertion length of the fluid contact rod into the protective tube is shortened, the endothermic amount tends to be insufficient.
In addition, in the configuration of Patent Document 1, when inserting the fluid contact rod into the protective tube, the fluid contact rod can be inserted until it is pushed by the bottom of the valve and the strands of the coil spring are brought into close contact with each other. There is a risk of letting you.
In Patent Document 1, since a valve is provided over substantially the entire length of the protective tube, and a cap is provided on the protective tube, parts cost and assembly cost are increased for these valves and caps.

  An object of the present invention is to provide a temperature / pressure measuring device that can secure a heat absorption amount of a fluid to be measured and improve the accuracy of temperature measurement with a simple configuration, and that does not permanently deform a check valve spring. And providing a mounting device thereof.

  The temperature / pressure measuring device according to the present invention includes a measuring body for measuring the temperature and pressure of a fluid to be measured, a temperature sensing unit for the fluid to be measured in contact, and a pressure for introducing the fluid pressure of the fluid to be measured into the measuring body. A fluid contact rod in which the introduction portion is integrally formed in a rod shape, and a cylindrical member that is inserted into and fixed to a mounting port formed in the member to be measured fluid, and is fixed to the mounting port in the interior thereof A protective tube having an annular portion that is detachably fixed to the inner wall of the fluid contact rod inserted from the end portion on the other side and projects radially inward, and one of the fluid contact rods disposed in the protective tube. A bottomed substantially cylindrical member into which a portion is inserted, having a flange protruding from the side wall thereof, and between the inner wall of the protective tube on the rear side in the insertion direction of the fluid contact rod with respect to the annular portion A gap is formed through which the fluid to be measured can flow A lube sleeve, a coil spring disposed on the outer periphery of the valve sleeve and biasing the flange toward the annular portion, and an opening smaller than the outer diameter of the valve sleeve, and on the front side in the insertion direction of the protective tube And a locking member that is provided at an end and locks the coil spring.

In the temperature / pressure measuring device of the present invention, when measuring the temperature and fluid pressure of the fluid to be measured, the fluid contact rod is inserted into the protective tube fixed to the member to be measured, and the fluid is removed from the protective tube. The check valve functions when the contact rod is removed.
That is, at the time of measurement, since the bottom of the valve sleeve is pushed by the fluid contact rod inserted into the protective tube, the flange of the valve sleeve is separated from the annular portion of the protective tube and the valve is opened. In this state, the pressure of the fluid to be measured introduced into the protective tube from the opening of the locking member is introduced into the measurement main body via the gap between the valve sleeve and the protective tube inner wall. That is, the gap constitutes the flow path of the fluid to be measured.
On the other hand, when the fluid contact rod is removed from the protective tube during maintenance, etc., the flange of the valve sleeve comes into contact with the annular portion of the protective tube due to the spring force of the coil spring and the back pressure of the fluid to be measured. The flow path between the inner wall of the pipe is blocked.

Here, in the present invention, since the coil spring is arranged on the outer periphery of the valve sleeve, the effective use length of the protective tube that allows the fluid contact rod to contact the fluid to be measured is the position where the fluid contact rod is fixed to the protective tube. To the tip of the protective tube opposite to the side where the fluid contact rod is inserted. Thereby, since the temperature sensing part is immersed to a deep position of the accommodation member of the fluid to be measured, the amount of heat absorption from the fluid to be measured is increased correspondingly, and a sufficient amount of heat absorption necessary for accurate measurement can be secured. Thereby, the accuracy of temperature measurement can be improved.
And since the amount of heat absorption is ensured in this way, the protective tube can be shortened, so that the material cost of the protective tube can be reduced while maintaining the strength of the protective tube.

  In addition, since the coil spring is arranged on the outer periphery of the valve sleeve and the stroke of the valve sleeve that moves when the fluid contact rod is inserted is defined by the locking member, the elastic amount of the coil spring is limited within this stroke range. Is done. That is, even if the fluid contact rod is long enough to reach the tip of the protective tube, the bottom of the valve sleeve that has been pushed and moved by the tip of the fluid contact rod is locked to the peripheral edge of the opening of the locking member. . That is, since the locking member functions as a stopper for the valve sleeve, it is possible to prevent occurrence of buckling and permanent deformation of the coil spring.

  In the present invention, the opening for introducing the fluid to be measured is configured by the tip of the protective tube that is open to the fluid to be measured, and the locking member is used as both the locking of the coil spring and the stopper of the valve sleeve. ing. That is, it is not necessary to provide a cap or a valve chamber member at the distal end portion of the protective tube, or to separately provide a spring locking member and a stopper for the fluid contact rod, so that the configuration can be simplified. In other words, the number of parts is reduced, and the parts cost and assembly cost can be reduced. Therefore, it is suitable for mass production and can be installed in a large number of temperature / pressure measuring devices in a large-scale facility.

  In the temperature / pressure measuring device according to the present invention, the appropriate length of the fluid contact rod is such that when the fluid contact rod is inserted into the protective tube, the bottom of the valve sleeve reaches the locking member. It is preferable that the predetermined position of the fluid contact rod is fixed to the protective tube.

According to the present invention, the appropriate length of the fluid contact rod is set as described above, and when the fluid contact rod longer than the appropriate length is inserted into the protective tube, the bottom of the valve sleeve is the locking member. In this case, the predetermined position of the fluid contact rod cannot be fixed to the protective tube. In other words, it is easy for the inserted fluid contact rod to be improper in length due to a sense of abutment against the locking member or because the predetermined position of the fluid contact rod protrudes from the base end of the protective tube. I understand. Thereby, even if the length of the fluid contact rod varies, an appropriate fluid contact rod can be surely inserted into the protective tube to perform a correct measurement.
The fluid contact rod is fixed to the protective tube by, for example, a male screw formed on the outer periphery of the base end portion of the fluid contact rod being screwed into a female screw formed on the inner periphery of the base end portion of the protective tube. This is done.

  In the temperature / pressure measuring apparatus according to the present invention, the fluid contact rod is fixed to the protective tube, and the effective contact length of the protective tube is such that the fluid contact rod is in contact with the fluid to be measured in the protective tube. The length from the end of the protective tube to the front end of the protective tube in the insertion direction is ½ of the effective use length. The length of the valve sleeve is such that the end of the valve sleeve on the rear side in the insertion direction overlaps the position of the annular portion when the fluid contact rod is inserted into the valve sleeve. It is preferable.

According to the present invention, since the length of the valve sleeve is shorter than the effective use length in substantially the same manner as the length between the annular portion and the distal end portion of the protective tube, the fluid contact rod protrudes from the valve sleeve. Therefore, the fluid contact rod can be sufficiently brought into contact with the fluid to be measured between the inner wall of the protective tube. Thereby, compared with the case where the distance from the front-end | tip part of a protective tube to a cyclic | annular part is more than 1/2 of effective use length, the precision of temperature measurement can be improved further. In addition, the material cost can be reduced due to the short length of the valve sleeve.
A flow path having a width corresponding to the thickness of the side wall of the valve sleeve is formed between the fluid contact rod and the protective tube inner wall.

  In the temperature / pressure measuring device of the present invention, it is preferable that an annular seal member is interposed between the flange of the valve sleeve and the annular portion.

  According to this invention, since the flange and the annular portion are in close contact with each other via the seal member, the flow path of the fluid to be measured can be blocked more reliably.

  In the temperature / pressure measuring device according to the present invention, the annular portion is formed with an inclined surface whose diameter increases from the rear side in the insertion direction toward the front side in the insertion direction, and the valve sleeve includes the seal member on the flange. It is preferable to have sealing member locking means for locking.

According to the present invention, the inclined surface serves as a guide and the sealing member is brought into close contact with the outer peripheral portion of the valve sleeve and the inner peripheral surface of the protective tube to exhibit the sealing performance. Compared with the case where the member is elastically deformed only in the length direction of the protective tube, the spring force of the coil spring necessary to realize the same sealing performance can be reduced. As a result, the portion of the seal member that contacts the annular portion is less likely to be scraped or creep deformed.
Further, since the seal member is fixed to the valve sleeve by the seal member locking means, quantitative sealing performance can be obtained.

  In the temperature / pressure measuring device of the present invention, the seal member locking means is a locking flange protruding from the side wall of the valve sleeve on the rear side in the insertion direction with respect to the flange, and the seal member is the flange And a groove formed between the locking flange and projecting radially outward from the locking flange.

  According to the present invention, the seal member can be easily and reliably fixed in the groove portion between the locking flange and the flange, and the seal member protrudes from the locking flange. Can be in close contact with.

  In the temperature / pressure measuring device according to the present invention, a groove is formed along the circumferential direction in the inner wall of the end portion of the protective tube on the front side in the insertion direction, and the locking member is locked to the groove. The ring is preferably fixed to the protective tube.

  According to this invention, the retaining member can be easily fixed to the end opening of the protective tube with a structure that is not bulky by the retaining ring.

  In the temperature / pressure measuring apparatus according to the present invention, it is preferable that a through hole through which a fluid to be measured flows is formed in a side wall on the rear side in the insertion direction with respect to the annular portion of the valve sleeve.

  According to the present invention, in the state where the valve sleeve flange is separated from the annular portion and the valve is opened, the fluid to be measured is not only the gap between the side wall of the valve sleeve and the inner wall of the protective tube, but also the through hole of the valve sleeve. Since the fluid contact rod is quickly contacted, the temperature and pressure of the fluid to be measured can be accurately measured.

  The temperature / pressure measuring instrument mounting apparatus according to the present invention includes a measuring body for measuring the temperature and pressure of the fluid to be measured, a temperature sensing unit for the fluid to be measured in contact, and the fluid pressure of the fluid to be measured to the measuring body. An attachment device for attaching a temperature / pressure gauge including a fluid contact rod in which a pressure introduction portion to be integrally formed is formed into a rod shape in a state of being inserted into an attachment port formed in a member to be measured. A cylindrical member inserted into and fixed to the mounting port, and the fluid contact rod inserted from the end on the side fixed to the mounting port is detachably fixed therein; and A protective tube having an annular portion protruding radially inward on the inner wall, and a bottomed substantially cylindrical member into which a part of the fluid contact rod is inserted and inserted into the protective tube, and a flange protruding from the side wall And the fluid contact than the annular portion. A valve sleeve in which a gap through which the fluid to be measured can flow is formed between the rod and the inner wall of the protective tube on the rear side in the insertion direction of the rod, and the flange disposed on the outer periphery of the valve sleeve is attached to the annular portion. A coil spring for energizing, and a locking member that has an opening smaller than the outer diameter of the valve sleeve and that is provided at an end of the protective tube on the front side in the insertion direction to lock the coil spring. Features.

According to the present invention, as described above, the coil spring is arranged on the outer periphery of the valve sleeve, so that the effective use length of the protective tube can be ensured long, and thereby the heat absorption necessary for accurate measurement can be sufficiently secured. Therefore, the accuracy of temperature measurement can be improved.
Moreover, since the amount of heat absorption is ensured in this way, the protective tube can be shortened, so that the cost of parts of the protective tube can be reduced while maintaining the strength of the protective tube.
Furthermore, since the coil spring is arranged on the outer periphery of the valve sleeve and the locking member functions as a stopper for the valve sleeve, the occurrence of buckling and permanent deformation of the coil spring can be prevented.
In the present invention, it is not necessary to provide a cap or a valve chamber member at the tip of the protective tube, or to separately provide a spring locking member and a valve sleeve stopper. And assembly costs can be reduced.

Embodiments of the present invention will be described below with reference to the drawings.
In the description of the second and subsequent embodiments, the same components as those of the first embodiment described below are denoted by the same reference numerals, and description thereof is omitted or simplified.

[First Embodiment]
[1. overall structure〕
FIG. 1 is a front view of a temperature / pressure gauge 1A in the present embodiment. This temperature / pressure gauge 1A is provided with an indication unit 11 for displaying measured values of temperature and fluid pressure on the front side, a case 10 accommodating a measurement main body on the back side, and a protrusion provided on the outer periphery of the case 10 for contact. And a fluid contact rod 20 that introduces temperature information and fluid pressure of the measured fluid into the measurement main body in the case 10.

[2. (Configuration of the indicator)
The indicating unit 11 includes a scale plate 110 in which a temperature scale 111 and a pressure scale 112 are arranged in an arc, a temperature indicator 121 indicating the scale 111, and a pressure pointer 122 indicating the scale 112. And is configured. In addition, the display form in this instruction | indication part 11 can be comprised suitably.

[3. (Configuration of fluid contact rod)
As shown in FIG. 2, the fluid contact rod 20 is coupled to the outer periphery of the case 10 on the back side, and the square nut portion 21A is sequentially formed from the base end portion 20A coupled to the case 10 toward the distal end portion 20B. Are integrally provided with a male screw portion 21 provided with a pressure introduction portion 22 having a smaller diameter than the male screw portion 21 and a temperature sensing portion 23 having a smaller diameter than the pressure introduction portion 22 and made of bimetal or the like. Note that the temperature sensing mechanism in the temperature sensing unit 23 is provided at the tip 20B of the fluid contact rod 20 or in the vicinity of the tip 20B.
A ring-shaped rubber packing 221 is provided on the outer periphery of the pressure introducing portion 22.

  Here, each of the pressure introducing unit 22 and the temperature sensing unit 23 is connected to the instruction unit 11 (FIG. 1) via a conversion mechanism provided in the measurement main body (not shown), and is introduced by the pressure introducing unit 22. The fluid pressure is converted into the movement of the pointer 122, and the temperature sensed by the temperature sensing unit 23 is converted into the movement of the pointer 121.

[4. (Configuration of temperature / pressure gauge mounting device)
FIG. 3 shows the above-described temperature / pressure gauge 1 </ b> A and the attachment device 1 </ b> B for attaching the temperature / pressure gauge 1 </ b> A to the attachment port 101 of the accommodating member 100 that accommodates a fluid to be measured such as gas or liquid. The temperature / pressure gauge 1A and the mounting device 1B constitute a temperature / pressure measuring device 1.

  FIG. 4 is a side sectional view of the attachment device 1B with the fluid contact rod 20 removed. This attachment device 1B includes a protective tube 30 inserted and fixed in the attachment port 101 of the housing member 100 (FIG. 3), a valve sleeve 40 disposed in the protective tube 30 and functioning as a check valve, and an outer periphery of the valve sleeve 40. And a locking ring 60 which is provided at the distal end portion 30B of the protective tube 30 and locks the coil spring 50.

A square nut portion 301 and a male screw portion 302 are formed on the outer periphery of the protective tube 30. When the male screw portion 302 is screwed into the female screw portion formed in the attachment port 101 (FIG. 3), the protective tube 30 protrudes from the attachment port 101 to the inside of the housing member 100.
On the inner periphery of the protective tube 30, a female screw portion 31 and a female screw are disposed in order from the base end portion 30 </ b> A disposed outside the attachment port 101 toward the distal end portion 30 </ b> B inserted inside the housing member 100. A pressure introducing chamber 32 having a smaller diameter than the screw portion 31, a flow path portion 33 having a smaller diameter than the pressure introducing chamber 32, and a valve chamber 34 having a diameter increased from the flow path portion 33 and provided with a valve sleeve 40 (FIG. 3). And have. The female screw portion 31, the pressure introduction chamber 32, the flow path portion 33, and the valve chamber 34 are in communication with each other.

The male screw portion 21 of the fluid contact rod 20 (FIG. 3) is screwed into the female screw portion 31 on the inner periphery of the protective tube 30. Thereby, the fluid contact rod 20 is detachably fixed to the protective tube 30.
The pressure introducing chamber 32 corresponds to the pressure introducing portion 22 of the fluid contact rod 20, and the rubber packing 221 is in close contact with the inner peripheral surface of the pressure introducing chamber 32. The fluid pressure of the fluid to be measured is introduced from the pressure introduction chamber 32 to the sensor portion of the measurement main body in the case 10 by the pressure introduction portion 22 of the fluid contact rod 20.

The flow path portion 33 is inserted from the proximal end portion to the distal end portion of the temperature sensing portion 23, and a width corresponding to the thickness of the side wall of the valve sleeve 40 is provided between the temperature sensing portion 23 and the inner wall of the flow passage portion 33. The flow path is formed.
A receiving seat 341 as an annular portion is formed in a stepped portion from the inner wall of the protective tube 30 on the flow path portion 33 side at a portion of the valve chamber 34 that is expanded from the flow path portion 33. A groove 342 is formed along the circumferential direction on the inner wall of the end of the valve chamber 34 opened to the fluid to be measured.
Here, when the dimension from the female thread portion 31 where the fluid contact rod 20 is fixed to the protective tube 30 to the distal end portion 30B of the protective tube 30 is the effective use length L of the protective tube 30, the distal end portion 30B of the protective tube 30 The dimension L1 from the seat to the seat 341 is about 1/3 of the effective use length L.

As shown in FIG. 4, the valve sleeve 40 has a bottomed cylindrical shape having a bottom portion 41, and a through hole 42 is formed in the side wall of the valve sleeve 40, and the protective tube 30 is more than the through hole 42. A flange 43 corresponding to the seat 341 of the protective tube 30 is formed on the distal end portion 30B side. A rubber packing 431 as an annular sealing member is interposed between the flange 43 and the receiving seat 341. A part of the fluid contact rod 20 is inserted into the valve sleeve 40 (FIG. 3).
A small gap G through which the fluid to be measured can pass is formed between the valve sleeve 40 and the inner wall of the protective tube 30.

  The compression coil spring 50 is disposed between the receiving seat 341 and the locking ring 60 between the valve sleeve 40 and the inner wall of the protective tube 30. The coil spring 50 urges the valve sleeve 40 along the length direction of the protective tube 30 from the distal end portion 30B side of the protective tube 30 to the proximal end portion 30A side.

  An opening 61 having a diameter smaller than the outer diameter of the valve sleeve 40 is formed in the locking ring 60. The locking ring 60 is fixed in the vicinity of the edge of the protective tube 30 by a retaining ring (C ring) 62 locked to the groove 342 on the inner wall of the protective tube 30, and locks the end of the coil spring 50.

FIG. 5 shows a state in which the temperature / pressure gauge 1A is attached to the attachment device 1B. FIG. 6 is a partially enlarged view of FIG.
Here, when attaching the fluid contact rod 20 to the protective tube 30, the male screw portion 21 of the fluid contact rod 20 is screwed into the female screw portion 31 of the protective tube 30, and the male screw portion 21 and the female screw portion. 31 is in a state of being screwed together. As a result, the fluid contact rod 20 is inserted into the protective tube 30 to the maximum extent. At this time, the bottom 41 of the valve sleeve 40 is stopped at a position where it does not reach the locking ring 60, and the coil spring 50 is deformed within a predetermined elastic region of the spring.

[5. Valve action during measurement and non-measurement)
When the fluid contact rod 20 is inserted into the protective tube 30 as shown in FIG. 5, the tip 20B of the fluid contact rod 20 pushes the bottom 41 of the valve sleeve 40 against the spring force of the coil spring 50, and the valve sleeve 40 The flange 43 is separated from the seat 341 and the valve is opened.
In this state, the fluid to be measured is introduced into the protective tube 30 from the opening 61 of the locking ring 60, and the fluid to be measured introduced into the protective tube 30 passes through the gap G from the valve chamber 34. To the fluid contact rod 20. The fluid to be measured introduced into the protective tube 30 contacts the fluid contact rod 20 from the valve chamber 34 through the through hole 42 of the valve sleeve 40.
As described above, the fluid to be measured sufficiently reaches the surface of the fluid contact rod 20, and the temperature of the fluid to be measured at the tip portion 30 </ b> B of the protective tube 30 passes through the side surface portion and the bottom portion of the valve sleeve 40. The temperature of the fluid under measurement is sensed by the temperature sensing part 23 by being transmitted to the temperature sensing mechanism part at the tip of 20. Then, the sensed temperature information of the fluid to be measured is sent from the temperature sensing unit 23 to the measurement main body.
Further, the fluid to be measured reaches the pressure introduction chamber 32 through the flow path portion 33 including the gap G, and the fluid is introduced from the pressure introduction chamber 32 to the measurement main body in the case 10 by the pressure introduction portion 22 of the fluid contact rod 20. Pressure is introduced.

On the other hand, when the fluid contact rod 20 is extracted from the protective tube 30, the state shown in FIG. At this time, the valve sleeve 40 moves to the base end portion 30 </ b> A side of the protective tube 30 due to the spring force of the coil spring 50 and the back pressure of the fluid to be measured, and the flange 43 comes into close contact with the seat 341 via the rubber packing 431. At this time, the rubber packing 431 is crushed and closes the gap G. Thereby, the flow path of the fluid to be measured from the valve chamber 34 to the flow path section 33 is blocked, and the valve is closed.
That is, when the valve sleeve 40 functions as a check valve, when the fluid contact rod 20 is removed from the protective tube 30 and maintenance or replacement of the temperature / pressure gauge 1A is performed, operation of the equipment having the housing member 100 is performed. There is no need to stop or drain the fluid inside the housing member 100.

[6. (Appropriate length of fluid contact rod)
In each of the drawings shown above, the temperature / pressure gauge 1A includes the fluid contact rod 20 having an appropriate length that matches the length of the protective tube 30, but there are various lengths of the fluid contact rod 20, There is a possibility that the fluid contact rod 20 having an inappropriate length may be erroneously inserted into the protective tube 30.
FIG. 7 shows a state in which the fluid contact rod 20 </ b> X whose dimension of the temperature sensing unit 23 is longer than the appropriate value is inserted into the protective tube 30. In this case, the bottom of the valve sleeve 40 moved by being pushed by the tip 20B of the fluid contact rod 20X contacts the peripheral edge of the opening 61 of the locking ring 60, and the locking ring 60 functions as a stopper. The male screw portion 21 of the rod 20X cannot be screwed to the female screw portion 31 of the protective tube 30 to the end.
Thus, when the fluid contact rod 20X longer than the appropriate value is inserted into the protective tube 30, the bottom of the valve sleeve 40 is locked by the locking ring 60, so that the amount of compression of the coil spring 50 is a predetermined amount of the spring. Limited to the elastic region. Further, the feel when the bottom of the valve sleeve 40 hits the locking ring 60 and the appearance that the male threaded portion 21 of the fluid contact rod 20X protrudes from the female threaded portion 31 of the protective tube 30 and is not completely fixed. It is possible to notify the user that the fluid contact rod 20X has an inappropriate length.

[7. Effects of this embodiment]
According to the above embodiment, the following effects can be obtained.
(1) In the temperature / pressure measuring device 1, the coil spring 50 is disposed on the outer periphery of the valve sleeve 40, so that the effective use length L of the protective tube 30 is long, and the temperature sensing is located closer to the tip 20 </ b> A than the pressure introducing portion 22 Since the portion 23 is immersed to a deep position of the housing member 100, the amount of heat absorbed from the fluid to be measured increases accordingly, and the amount of heat absorbed necessary for accurate measurement can be sufficiently secured. Thereby, the accuracy of temperature measurement can be improved.
And since the protective tube 30 can be shortened by ensuring the heat absorption amount in this way, the component material cost of the protective tube 30 can be reduced while maintaining the strength of the protective tube 30.

(2) Since the coil spring 50 is disposed on the outer periphery of the valve sleeve 40 and the locking ring 60 serves as a stopper for the valve sleeve 40, the amount of compression of the coil spring 50 is limited within the range of the stroke of the valve sleeve 40. That is, even if the fluid contact rod 20X having a length reaching the tip 30B of the protection tube 30 is inserted into the protection tube 30, the bottom of the valve sleeve 40 moved by being pushed by the tip 20B of the fluid contact rod 20X is locked. Since it is locked to the peripheral edge of the opening 61 of the ring 60, the occurrence of buckling and permanent deformation of the coil spring 50 can be prevented.

(3) Since the opening for introducing the fluid to be measured is formed by the distal end portion 30B of the protective tube 30, the locking ring 60 is also used as the locking of the coil spring 50 and the stopper of the valve sleeve 40. Can be simplified. In other words, the number of parts is reduced, and the parts cost and assembly cost can be reduced. Therefore, it is suitable for mass production and can be installed in a large number of temperature / pressure measuring devices in a large-scale facility.

(4) Before the bottom 41 of the valve sleeve 40 reaches the locking ring 60, the fluid contact rod 20 is set to such a length that substantially the entire male screw portion 21 of the fluid contact rod 20 is fixed to the protective tube 30. Since the length is set, when the fluid contact rod 20X longer than the appropriate length is inserted into the protective tube 30, the male threaded portion 21 of the fluid contact rod 20 is completely replaced by the female threaded portion of the protective tube 30. It cannot be screwed and fixed to 31, and it can be easily seen that the length of the fluid contact rod 20X is inappropriate. For this reason, it is possible to reliably insert the appropriate fluid contact rod 20 into the protective tube 30 and perform correct measurement.

(5) The dimension L1 from the distal end portion 30B of the protective tube 30 to the seat 341 is set to ½ or less of the effective use length L of the protective tube 30, and the length of the valve sleeve 40 is accordingly reduced to the effective use length L. Therefore, in the portion of the fluid contact rod 20 that protrudes from the valve sleeve 40, the fluid contact rod 20 can be sufficiently brought into contact with the fluid to be measured between the inner wall of the protective tube 30. Thereby, the accuracy of temperature measurement can be further improved.
In addition, since the length of the valve sleeve 40 is short, the component material cost can be reduced.

(6) The valve sleeve 40 can be guided along the length direction by the inner wall on the base end portion 30 </ b> A side from the seat 341 of the protective tube 30.
Further, in the state where the flange 43 of the valve sleeve 40 is separated from the seat 341, the fluid to be measured is not only the gap G between the side wall of the valve sleeve 40 and the inner wall of the protective tube 30, but also the through hole 42 of the valve sleeve 40. As a result, since the fluid contact rod 20 is quickly contacted, the temperature and pressure of the fluid to be measured can be accurately measured.

(7) Since the locking ring 60 is fixed to the protective tube 30 by the retaining ring 62 locked to the groove 342, the locking ring 60 is easily fixed to the end opening of the protective tube 30 with a structure that is not bulky. can do.

(8) Since the flange 43 and the receiving seat 341 are in close contact with each other by the rubber packing 431 interposed between the flange 43 of the valve sleeve 40 and the receiving seat 341, the flow path of the fluid to be measured can be blocked more reliably. .

[Second Embodiment]
Next, a second embodiment of the present invention will be described. The present embodiment and the first embodiment differ in the configuration of the valve sleeve, the configuration of the inner wall of the protective tube, and the spring force of the coil spring.
The present embodiment is mainly aimed at preventing deterioration of the seal member.
FIG. 8 shows a temperature / pressure gauge in the present embodiment. A locking flange 74 is formed on the proximal end side of the flange 43 of the valve sleeve 70. A groove 741 is formed between the locking flange 74 and the flange 43, and a rubber packing 431 as a seal member is fixed to the groove 741 in a state of projecting radially outward from the locking flange 74. ing. Although the through hole 42 is not formed in the valve sleeve 70 of this embodiment as in the valve sleeve 40 (FIG. 5) of the above embodiment, the fluid to be measured is transferred to the fluid contact rod 20 via the gap G. The pressure of the fluid to be measured is introduced through the gap G.

Here, a slope 841 is formed on the inner periphery of the seat 341 in the protective tube 80 of the present embodiment. Specifically, the inner wall of the protective tube 80 is formed with a stepped portion 81 whose diameter is increased in accordance with the outer periphery of the locking flange 74, and further expands from the stepped portion 81 toward the distal end portion 30 </ b> B side of the protective tube 80. A radiused slope 841 is formed.
In this embodiment, the compression coil spring 55 having a smaller spring coefficient than the coil spring 50 of the first embodiment is used.

  FIG. 9 shows a state in which the fluid contact rod 20 is removed from the protective tube 80. When the fluid contact rod 20 is removed from the protective tube 80, the valve sleeve 70 moves toward the base end 30A side of the protective tube 80 due to the spring force of the coil spring 55 and the fluid pressure of the fluid to be measured. As a guide, the rubber packing 431 is elastically deformed not only in the length direction of the valve sleeve 70 but also in the radial direction, and is in close contact with the outer peripheral portion of the valve sleeve 70 and the inner peripheral surface of the protective tube 80. Thereby, the flow path of the fluid to be measured from the valve chamber 34 to the flow path portion 33 is blocked.

According to this embodiment, in addition to the effects described in the first embodiment, the following effects can be obtained.
(9) Since the inclined surface 841 serves as a guide and exhibits high sealing performance, the coil spring 55 having a smaller spring coefficient can be used as compared with the case where the inclined surface 841 is not formed. Accordingly, it is difficult for the rubber packing 431 to be scraped or for the coil spring 55 to undergo creep deformation.

(10) Since the rubber packing 431 is fixed to the valve sleeve 70 by the locking flange 74, quantitative sealing performance can be obtained.

(11) Since the rubber packing 431 can be fixed easily and reliably in the groove 741 between the locking flange 74 and the flange 43, and the rubber packing 431 protrudes from the locking flange 74, the rubber packing 431 is It is possible to ensure close contact with the slope 841.

  The means for fixing the rubber packing 431 to the flange 43 is not limited to the locking flange 74 of the second embodiment. For example, the rubber packing 431 can be bonded to the flange 43 or at several locations on the side wall of the valve sleeve. It can be considered that the rubber packing 431 is fixed to the flange 43 by the formed convex pieces.

Although the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.
Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

  For example, in each of the above embodiments, the compression coil springs 50 and 55 are used as means for urging the flange of the valve sleeve toward the annular portion of the protective tube. However, the present invention is not limited to this, and a tension coil spring may be used. Can be considered. That is, in the first embodiment, the compression coil spring 50 is interposed between the locking ring 60 provided at the end 30B opposite to the side where the fluid contact rod 20 of the protective tube 30 is inserted and the flange 43 of the valve sleeve 40. However, a spring locking part is formed on each part of the valve sleeve and on a part of the protective tube located on the side where the fluid contact rod is inserted rather than a part of the valve sleeve. A tension coil spring may be disposed between the spring locking portions. In this way, the effective use length of the protective tube can be further increased.

The front view of the temperature and pressure gauge which concerns on 1st Embodiment of this invention. The side view of the said temperature and pressure gauge. The figure which shows the state which attached the said temperature and the pressure gauge to the accommodation member of the fluid to be measured with an attachment apparatus. The side sectional view of the protection pipe in the state where the fluid contact rod of the temperature / pressure gauge is not inserted. The side sectional view of a protection tube in the state where a fluid contact rod of a temperature and pressure gauge was inserted. The elements on larger scale of FIG. The sectional side view which shows the state by which the fluid contact rod of improper length was inserted in the protective tube. The side sectional view of the temperature and pressure gauge concerning a 2nd embodiment of the present invention. In the said embodiment, the sectional side view of the protection tube in the state where the fluid contact rod is not inserted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Temperature / pressure measuring apparatus 1A Temperature / pressure gauge 1B Mounting apparatus 20 Fluid contact rod 22 Pressure introducing part 23 Temperature sensing part 30 Protective pipe 32 Pressure introducing chamber 33 Flow path part 34 Valve room 40 Valve sleeve 41 Bottom part 42 Through hole 43 Flange 50 Compression coil spring (coil spring)
60 Locking ring (locking member)
70 Valve sleeve 80 Protective tube 61 Opening 100 Housing member 101 Mounting port 341 Receiving seat (annular portion)
342 Groove 431 Rubber packing (seal member)
74 Flange for locking (seal member locking means)
741 Groove 841 Slope G Gap L Effective working length

Claims (9)

A measuring body for measuring the temperature and pressure of the fluid to be measured;
A fluid contact rod in which a temperature sensing portion of the fluid to be measured that is in contact and a pressure introduction portion for introducing the fluid pressure of the fluid to be measured into the measurement body are integrally formed in a rod shape;
A cylindrical member that is inserted into and fixed to a mounting port formed in the fluid-measuring member, and the fluid contact rod that is inserted into the mounting port from the end fixed to the mounting port is removable. A protective tube having an annular portion fixed to the inner wall and projecting radially inward on the inner wall thereof;
A bottomed substantially cylindrical member that is disposed in the protective tube and into which a part of the fluid contact rod is inserted, has a flange protruding from the side wall thereof, and the insertion direction of the fluid contact rod from the annular portion A valve sleeve in which a gap through which a fluid to be measured can flow is formed between the inner wall of the protective tube on the rear side;
A coil spring disposed on an outer periphery of the valve sleeve and biasing the flange toward the annular portion;
A locking member that has an opening smaller than the outer diameter of the valve sleeve and is provided at an end of the protective tube on the front side in the insertion direction, and locks the coil spring. Pressure measuring device. The temperature / pressure measuring device according to claim 1,
The appropriate length of the fluid contact rod is such that when the fluid contact rod is inserted into the protective tube, the predetermined position of the fluid contact rod is positioned before the bottom of the valve sleeve reaches the locking member. A temperature / pressure measuring device characterized in that it is fixed to the length. The temperature / pressure measuring device according to claim 1 or 2,
The effective use length of the protective tube, which is a length that allows the fluid contact rod to contact the fluid to be measured in the protective tube, from the position where the fluid contact rod is fixed to the protective tube to the insertion direction in the protective tube. When it is the length to the front end,
The dimension from the end in the insertion direction front side of the protective tube to the annular portion is ½ or less of the effective use length,
The length of the valve sleeve is such that the end of the valve sleeve on the rear side in the insertion direction overlaps the position of the annular portion in a state where the fluid contact rod is inserted into the valve sleeve. Characteristic temperature / pressure measuring device. The temperature / pressure measuring device according to any one of claims 1 to 3,
An annular seal member is interposed between the flange of the valve sleeve and the annular portion. The temperature / pressure measuring device according to claim 4,
The annular portion is formed with a slope that expands from the insertion direction rear side toward the insertion direction front side,
The said valve sleeve has a seal member latching means which latches the said seal member to the said flange. The temperature and pressure measuring device characterized by the above-mentioned. The temperature / pressure measuring device according to claim 5,
The seal member locking means is a locking flange protruding from the side wall of the valve sleeve on the rear side in the insertion direction with respect to the flange.
The temperature / pressure measuring device, wherein the seal member is disposed in a groove formed between the flange and the locking flange, and protrudes radially outward from the locking flange. The temperature / pressure measuring device according to any one of claims 1 to 6,
A groove is formed along the circumferential direction on the inner wall of the end portion on the front side in the insertion direction of the protective tube,
The temperature / pressure measuring device, wherein the locking member is fixed to the protective tube by a retaining ring locked in the groove. The temperature / pressure measuring device according to any one of claims 1 to 7,
A temperature and pressure measuring device in which a through hole through which a fluid to be measured can flow is formed in a side wall on the rear side in the insertion direction with respect to the annular portion of the valve sleeve. The temperature / pressure measuring device according to any one of claims 1 to 8,
A measuring body for measuring the temperature and pressure of the fluid to be measured, a temperature sensing portion for the fluid to be measured in contact, and a pressure introducing portion for introducing the fluid pressure of the fluid to be measured into the measuring body are integrally formed in a rod shape. A mounting device for attaching a temperature / pressure gauge with a fluid contact rod inserted into a mounting port formed in a member to be measured;
A cylindrical member inserted and fixed in the mounting port, the fluid contact rod inserted from the end of the side fixed to the mounting port is detachably fixed, and the inner wall has a diameter A protective tube having an annular portion protruding inward in the direction;
A bottomed substantially cylindrical member that is disposed in the protective tube and into which a part of the fluid contact rod is inserted, has a flange protruding from the side wall thereof, and the insertion direction of the fluid contact rod from the annular portion A valve sleeve in which a gap through which a fluid to be measured can flow is formed between the inner wall of the protective tube on the rear side;
A coil spring disposed on an outer periphery of the valve sleeve and biasing the flange toward the annular portion;
A locking member that has an opening smaller than the outer diameter of the valve sleeve and is provided at an end of the protective tube on the front side in the insertion direction, and locks the coil spring. Pressure gauge mounting device.

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