JP2016140839A - Condensation-preventing cover for cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a condensation-preventing cover for a cooler which can be attached to a nozzle even with a more or less different dimension if the shape is standard and suppress the generation of condensation at a nozzle part.SOLUTION: A condensation-preventing cover 31 comprises a cylindrical heat insulation member 33 having at the center a nozzle insertion hole 32 through which nozzles 17, 18 projecting out of a cooler outer pipe 11 can be inserted and a bottomed cylindrical case member 34 capable of storing the nozzle tip side of the heat insulation member, the heat insulation member formed to a length of a nozzle projection dimension or more from a soft synthetic resin having adiabaticity, and the case member formed shorter than a nozzle projection dimension from a thin-walled synthetic resin with a male screw insertion hole 35 provided at the center of the bottom part of the nozzle tip side through which a male screw part is inserted provided in the outer periphery of the nozzle projection end side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dew condensation prevention cover for a cooler, and more particularly to a cover for preventing dew condensation on a transparent glass cooler used in various experimental devices such as a rotary evaporator.

  Coolers for condensing and separating necessary components or unnecessary components in steam are widely used in distillation operations and recovery operations of low-boiling organic solvents in various experiments. A typical cooler has a double tube structure in which an inner tube is arranged inside an outer tube made of transparent glass, and is generally condensed in an external flow path between the inner tube and the outer tube. The steam containing the component is supplied with cooling water to the internal flow path in the inner pipe to condense at least a part of the steam component.

  In such a cooler, depending on operation conditions, for example, when the temperature of the cooling water is low or the ambient humidity is high, dew condensation may occur on the outer surface of the cooler. When dew condensation occurs on the cooler, the dew condensation water may fall and the device or the experimental table may be submerged. As a countermeasure against such dew condensation, a cooler in which the outer tube has a heat insulating double tube structure has been proposed (see, for example, Patent Document 1).

JP 2000-279703 A

However, the cooler described in Patent Document 1 has a problem that the price is high, and the cooling water introduction nozzle and the cooling water outlet nozzle that protrude outside through the outer tube have a heat insulating structure. Since it does not have, dew condensation occurs in this nozzle part, and the dew condensation water falls, and in a long-time experiment, the apparatus and the experiment stand are immersed in water.
Also, since the cooler is made of glass, the shape of the nozzle part is not uniform, and furthermore, the shape of the nozzle part differs depending on the type of cooler, so it is difficult to adopt a dew condensation prevention structure, and measures against condensation As a matter of fact, a bubble cushioning material or cloth is wrapped around.

  Therefore, the present invention provides a dew condensation prevention cover for a cooler that can be attached even if the dimensions are slightly different as long as it is a standard nozzle shape, and that can prevent dew condensation from occurring in the nozzle portion. It is aimed.

  In order to achieve the above object, the dew condensation prevention cover of the cooler of the present invention has a double tube structure in which an inner tube through which cooling water flows is arranged inside an outer tube made of transparent glass, The end portion penetrates the outer pipe and protrudes outside to form a cooling water introduction nozzle and a cooling water outlet nozzle, and a condensed component is formed in the external flow path between the inner pipe and the outer pipe. Condensation prevention cover for the nozzle part in a cooler that supplies cooling water to the internal flow path in the inner pipe to condense at least a part of the vapor component, and the nozzle can be inserted in the center. A cylindrical heat insulating member having a nozzle insertion hole and a bottomed cylindrical case member capable of accommodating the nozzle tip side of the heat insulating member, and the heat insulating member is made of the soft synthetic resin having heat insulating properties, and the nozzle Formed with a length longer than the protruding dimension of The case member is formed with a thin synthetic resin shorter than the protruding dimension of the nozzle, and a male screw portion provided on the outer periphery of the protruding end of the nozzle is inserted into the center of the bottom of the nozzle tip side. It is characterized in that a hole is provided.

  Furthermore, in the dew condensation prevention cover of the cooler of the present invention, a plurality of protruding pieces are provided in the circumferential direction on the inner periphery of the male screw insertion hole of the case member, the protruding pieces are elastically deformable, and The diameter of the circle passing through the protruding end of each protruding piece is smaller than the diameter of the crest of the male screw portion.

  Further, a plane passing through the outer tube side end surface of the heat insulating member and the outer tube side end edge of the case member is inclined with respect to the axis of each member, and the case member is formed of the male screw. It is characterized by being fixed to the outer periphery of the nozzle by a cooling water pipe fixing nut screwed to the part.

  According to the dew condensation prevention cover of the cooler of the present invention, it is possible to prevent dew condensation from occurring in the nozzle portion by inserting the nozzle through the nozzle insertion hole formed in the heat insulating member housed in the case member. Further, since the heat insulating member is housed in the case member, handling such as attachment to and removal from the nozzle is easy. Furthermore, both members can be reused by washing.

  In addition, by providing a protruding piece that can be elastically deformed on the inner periphery of the male screw insertion hole of the case member, the protruding piece can be locked to the male screw portion when attached to the nozzle, and the nozzle can be temporarily fixed. It is possible to easily connect the cooling water piping to. Furthermore, by forming the tip on the outer tube side in an inclined state, the entire nozzle can be reliably covered even when the nozzle is inclined and protrudes with respect to the outer tube. Moreover, by fixing with a cooling water piping fixing nut, it is not necessary to prepare another fixing means, and piping connection and cover fixing can be performed simultaneously.

It is sectional drawing which shows one example of a dew condensation prevention cover of the cooler of this invention. It is a perspective view similarly. It is a side view which shows the state which attached the dew condensation prevention cover to the nozzle of the cooler. It is IV-IV sectional drawing of FIG.

  1 to 4 show an example of a dew condensation prevention cover for a cooler according to the present invention. First, the cooler shown in the present embodiment has a double tube structure of a cylindrical outer tube 11 and a double spiral inner tube 12 accommodated in the outer tube 11, and is all transparent. It is made of glass. In the lower part of the outer pipe 11, there are provided a steam introduction part 14 and a condensate outlet part 15 communicating with the lower part of the external flow path 13 between the inner pipe 12 and the outer pipe 11, and the internal flow in the inner pipe 12. A cooling water introduction nozzle 17 and a cooling water outlet nozzle 18 communicating with the inflow end and the outflow end of the passage 16 are provided through the outer tube 11. Further, a vapor outlet nozzle 19 communicating with the upper part of the external flow path 13 is provided at the upper part of the outer pipe 11, and an exhaust pipe 20 provided in the axial direction of the outer pipe 11 is provided at the lower part of the outer pipe 11. An exhaust nozzle 21 is provided for connecting an exhaust pipe when communicating and reducing the pressure in the external flow path 13.

  A sample flask is connected to the steam introduction unit 14, a condensate recovery flask is connected to the condensate extraction unit 15, and a cooling water circulation device is connected to the cooling water introduction nozzle 17 and the cooling water extraction nozzle 18 via a cooling water circulation pipe. Are connected to each other. The vapor evaporated in the sample flask flows into the external flow path 13 from the vapor introduction part 14 and comes into contact with the inner pipe 12 cooled by the cooling water flowing in the internal flow path 16 so that the condensed component in the vapor is formed. It condenses, flows down in the external flow path 13, flows down from the condensate outlet 15 to the recovery flask, and is collected. Further, non-condensed components in the steam are derived from the steam outlet nozzle 19 or the exhaust nozzle 21.

  The cooling water introduction nozzle 17 and the cooling water outlet nozzle 18 protrude with the nozzle body portion 17b bent downward after the attachment portion 17a is connected in the normal direction of the outer peripheral surface of the outer tube 11. On the outer periphery of the end, a male screw portion 24 for connecting a cooling water pipe connector 23 by a cooling water pipe fixing nut 22 is provided.

  The dew condensation prevention cover 31 shown in this embodiment includes a cylindrical heat insulating member 33 having a nozzle insertion hole 32 in the center, and a bottomed cylindrical case member 34 that can accommodate the nozzle tip side of the heat insulating member 33. I have. The heat insulating member 33 is made of a heat-insulating soft synthetic resin, for example, a special elastomer or synthetic rubber, and the length is the same as or slightly longer than the length of the nozzle body excluding the male screw portion of the nozzle to be attached. The nozzle insertion hole 32 has an inner diameter that is the same as or slightly smaller than the outer diameter of the nozzle. Further, the end surface 33a on the outer tube side of the heat insulating member 33 is cut at an inclined surface inclined with respect to the axis of the heat insulating member 33, in this embodiment, about 45 degrees in a direction parallel to the axis of the outer tube 11. It is formed in the inclined surface of the state made.

  The case member 34 is made of a synthetic resin material that can be elastically deformed moderately, for example, a thin-walled molded product of polypropylene, and has a bottomed cylindrical case body 34 a that is about half the length of the heat insulating member 33. And a holding piece 34b that protrudes linearly from the open end of the case body 34a in the direction of the outer tube. A plurality of holding pieces 34b are provided at equal intervals in the circumferential direction of the case main body 34a, the width of the tip is formed narrower than the width of the base, and the tip of the holding piece 34b is easily inward and outward. It has a deformable shape. Further, the plane passing through the protruding end edge of each holding piece 34 b is inclined with respect to the axis of the case member 34, similarly to the end surface 33 a of the heat insulating member 33.

  A male screw insertion hole 35 through which the male screw portion 24 is inserted is provided at the center of the bottom of the case member 34 on the nozzle tip side. On the inner periphery of the male screw insertion hole 35, a plurality of projecting pieces 35a are provided at equal intervals in the circumferential direction through cut portions 35b. The projecting piece 35a is elastically deformable, and the diameter of the circle passing through the projecting end of each projecting piece 35a is smaller than the diameter of the crest of the male screw portion 24. When the male screw part 24 is inserted into the protruding portion 35a, the protruding piece 35a is elastically deformed by pushing the case member 34 and passes through the outer periphery of the male screw portion 24. When the pressing force is released, the protruding piece 35a is male. It is formed so as to be in a state where the case member 34 is temporarily fixed to the nozzle portion by being locked to the crest portion of the screw portion 24.

  The condensation prevention cover 31 formed in this way is used in a state where the nozzle tip side of the heat insulating member 33 is housed in the case member 34 and is fixed with an adhesive or the like. Thereby, compared with the case where the heat insulation member 33 is used independently, the handleability of the dew condensation prevention cover 31 can be improved significantly. When the condensation prevention cover 31 is attached to the nozzle of the cooler, for example, as shown in FIGS. 3 and 4, the condensation prevention cover 31 is attached to the cooling water introduction nozzle 17 by holding the case member 34 and inserting the nozzle of the heat insulation member 33. The cooling water introduction nozzle 17 is pushed into the hole 32 so that the end surface 33 a of the heat insulating member 33 is brought into contact with the outer peripheral surface of the outer tube 11. Similarly, a condensation prevention cover 31 is attached to the cooling water outlet nozzle 18. In this state, since the protruding piece 35a of the case member 34 is locked to the male screw portion 24 and temporarily fixed, the cooling water introduction nozzle 17 and the cooling water outlet nozzle are set after the cooler is set in a predetermined installation state. 18, a cooling water pipe connector 23 is connected by a cooling water pipe fixing nut 22. The cooling water pipe fixing nut 22 is screwed into the male threaded portion 24, so that the cooling water pipe fixing nut 22 presses the bottom outer surface of the case member 34 in the direction of the outer pipe 11, and each nozzle is attached to the condensation prevention cover 31. Can be fixed.

  By attaching the dew condensation prevention cover 31 to the cooling water introduction nozzle 17 and the cooling water outlet nozzle 18 in this way, low-temperature cooling water flows into the cooling water introduction nozzle 17 and the cooling water outlet nozzle 18, and the cooling water introduction nozzle 17 and Even when the outer surface of the cooling water lead-out nozzle 18 is below the dew point temperature, the dew condensation prevention cover 31 blocks contact with the outside air, so that dew condensation occurs on the outer surfaces of the cooling water introduction nozzle 17 and the cooling water lead-out nozzle 18. Can be prevented.

  In addition, by forming the outer tube side of the heat insulating member 33 and the case member 34 obliquely cut, each nozzle that is often provided in a state bent downward with respect to the normal line of the outer tube 11 is provided. When the dew condensation prevention cover 31 is attached, the end surface 33 a of the heat insulating member 33 can be reliably pressed against the outer peripheral surface of the outer tube 11. In particular, by providing the case member 34 with a holding piece 34 b whose front end can be elastically deformed, the heat insulating member 33 is more reliably attached to the outer peripheral surface of the cooling water introduction nozzle 17 and the cooling water outlet nozzle 18 and the outer peripheral surface of the outer tube 11. Can be pressed against.

  Furthermore, by providing the protruding piece 35a on the inner periphery of the male screw insertion hole 35, the dew condensation prevention cover 31 can be temporarily fixed to the cooling water introduction nozzle 17 and the cooling water outlet nozzle 18, so that the cooling water pipe connection The attachment work of the tool 23 can be easily performed, and the case member 34 is pressed and fixed by the cooling water pipe fixing nut 22, so that the dew condensation prevention cover 31 can be attached as compared with the case where other fixing members are used. It can be done easily.

  Further, in order to prevent condensation on the outer peripheral surface of the outer tube in the cooler, the heat insulating double tube structure described in Patent Document 1 may be adopted, and as shown by imaginary lines in FIGS. You may make it attach the cylindrical outer tube | pipe cover material 41 which covers the outer periphery.

  The shape of the heat insulating member and case member can be attached by elastic deformation of the heat insulating member and case member even if the nozzle shape is slightly different by forming it in an appropriate shape according to the standard nozzle shape. It can be applied to various coolers. On the other hand, it can be formed in a shape dedicated to a specific cooling pipe.

  In addition, the shape of the heat insulating member or the case member is not limited to the shape of the above-described embodiment. For example, the outer tube side end surface of the heat insulating member or the case member is cut obliquely depending on conditions such as the amount of elastic deformation of the heat insulating member. The angle may be set at right angles, and the angle can be arbitrarily set. In addition, the shape of the protruding piece of the male screw insertion hole is arbitrary, the protruding piece can be omitted when the temporarily fixed state is unnecessary, and an appropriate means is also used for fixing the dew condensation prevention cover to the nozzle. Can do.

DESCRIPTION OF SYMBOLS 11 ... Outer pipe | tube, 12 ... Inner pipe | tube, 13 ... External flow path, 14 ... Steam introduction part, 15 ... Condensate derivation part, 16 ... Internal flow path, 17 ... Cooling water introduction nozzle, 17a ... Mounting part, 17b ... Nozzle Main body part 18 ... Cooling water outlet nozzle, 19 ... Steam outlet nozzle, 20 ... Exhaust pipe, 21 ... Exhaust nozzle, 22 ... Cooling water pipe fixing nut, 23 ... Cooling water pipe connector, 24 ... Male screw part, 31 ... Condensation prevention cover, 32 ... Nozzle insertion hole, 33 ... Thermal insulation member, 33a ... End face, 34 ... Case member, 34a ... Case body, 34b ... Holding piece, 35 ... Male screw insertion hole, 35a ... Projection piece, 35b ... Cutting Insertion part, 41 ... Outer tube cover material

Claims (4)

  The outer tube made of transparent glass has a double tube structure in which an inner tube through which cooling water circulates is disposed, and the end of the inner tube penetrates the outer tube and protrudes to the outside. Forming a nozzle for introduction and a nozzle for deriving cooling water, supplying steam containing a condensed component to the external flow path between the inner pipe and the outer pipe, and supplying cooling water to the internal flow path in the inner pipe A dew condensation prevention cover for the nozzle portion in the cooler that condenses at least a part of the vapor component, a cylindrical heat insulating member having a nozzle insertion hole through which the nozzle can be inserted in the center, and a nozzle of the heat insulating member A bottomed cylindrical case member capable of storing the tip side, and the heat insulating member is formed of a soft synthetic resin having a heat insulating property to have a length longer than the protruding dimension of the nozzle, and the case member is a thin synthetic Projection dimension of the nozzle by resin The cooler is characterized in that it is formed shorter and a male screw insertion hole through which a male screw portion provided on the outer periphery of the protruding end of the nozzle is inserted is provided at the bottom center of the nozzle tip side. Anti-condensation cover.   A plurality of protruding pieces are provided in the circumferential direction on the inner periphery of the male screw insertion hole of the case member, the protruding pieces are elastically deformable, and the diameter of a circle passing through the protruding end of each protruding piece is 2. The dew condensation prevention cover for a cooler according to claim 1, wherein the cover is formed smaller than the diameter of the crest portion of the male screw portion.   The plane passing through the end surface of the heat insulating member on the outer tube side and the edge of the case member on the outer tube side is inclined with respect to the axis of each member. Condensation prevention cover for cooler.   The condensation prevention of the cooler according to any one of claims 1 to 3, wherein the case member is fixed to an outer periphery of the nozzle by a cooling water pipe fixing nut screwed to the male screw portion. cover.

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