CN111148881A

CN111148881A - Drainage steam trap

Info

Publication number: CN111148881A
Application number: CN201980002147.5A
Authority: CN
Inventors: 近藤太郎; 西本慎吾
Original assignee: Kondoh Frp Co ltd
Current assignee: Kondoh Frp Co ltd
Priority date: 2018-09-03
Filing date: 2019-01-29
Publication date: 2020-05-12
Anticipated expiration: 2039-01-29
Also published as: US20210054607A1; TW202014582A; JPWO2020049616A1; DE112019001740T5; TWI741358B; SG11202010117QA; JP6590360B1; TW202206674A; CN113882482A; CN113882482B; KR20200028881A; TWI795931B; WO2020049616A1; KR102095234B1; CN111148881B; WO2020049753A1

Abstract

Provided is a drain trap which is easy to maintain, can prevent dew condensation, and has high durability. The drainage steam trap comprises: a bottom cylindrical body part (5), a side wall (51) of which is formed with a receiving pipe part (2) for receiving liquid and a discharge pipe part (3) for discharging liquid; an attachable/detachable partition body (1) for partitioning an inner space (4) of the body portion (5) into a storage space (7) and a discharge space (8); a cover portion (6) for closing off the inner space (4) of the body portion (5); and a sealing case (9) that surrounds, in a sealed state, at least an outer surface of a portion of the body portion (5) where the storage space (7) is formed. A gap (91) is formed between the seal case (9) and the body portion (5). The sealing housing (9) and the body part (5) are transparent. The lid portion (6) is attachable/detachable in a state where the seal case (9) is attached to the body portion (5).

Description

Drainage steam trap

Technical Field

The present disclosure relates to a drain trap disposed in a drain path.

Background

A drain trap for discharging liquid such as drain water of the air conditioner to the sewage inlet pipe is provided in the drain path. Conventionally, there is known a drain trap including: a body part in the form of a bottomed cylinder having a side wall formed with a receiving pipe part for receiving liquid and a discharge pipe part for discharging liquid; a attachable/detachable cover portion for blocking an inner space of the body portion; a connectable/detachable partition body for partitioning the internal space into a storage space communicating with the receiving pipe portion and for storing the liquid therein, and a discharge space communicating with the discharge pipe portion and for discharging the liquid (refer to patent document 1).

In the drain trap disclosed in patent document 1, the partition body does not connect the storage space and the discharge space, and therefore, the reverse flow of polluted air, odor, and the like is prevented in conjunction with the water-sealing action of the liquid stored in the storage space. In the drain trap, if the inner surface of the body portion and/or the inner surface of the separation body is soiled by the liquid stored in the storage space, cleaning of the inner surface of the body portion and/or the inner surface of the separation body is facilitated by the attachable/detachable features of the cover portion and the separation body. On the other hand, in a drainage trap used in a high-temperature and high-humidity area or the like, dew condensation is likely to occur on the outer surface of the main body due to a temperature difference between ambient air and liquid stored in the storage space. With the occurrence of dew condensation, there occurs inconvenience such as dropping of water droplets, thereby causing the surroundings thereof to be immersed in water. Furthermore, there is the further inconvenience of extremely low temperature ambient air freezing and expanding the liquid stored in the storage space, which can cause damage to the drain trap.

Patent documents 2 to 3 disclose techniques for preventing dew condensation from occurring in a drainage trap or preventing a liquid in a storage space from freezing. The drainage trap described in patent document 2 is configured to prevent the occurrence of dew condensation by covering the outer surface of the metal portion with a polyurethane foam layer. The drainage trap described in patent document 3 is configured to prevent damage to the drainage trap due to freezing of liquid in the storage space by covering the outer side surface except the bottom surface thereof with a thermal insulation material made of foamed resin.

Further, patent documents 4 to 6 disclose a pipe steam trap having no partition. Patent document 4 discloses a heat insulating cap that is attached to a main body of a pipe steam trap and an outlet-side connection port without a gap. The heat insulating material for the branch pipe and the heat insulating cover are independently or additionally arranged on the bath side branch pipe of the U-shaped piping steam trap. The lower door-side connection port and the reheating-side connection port of the U-shaped piping steam trap are exposed from the heat insulating cover and firmly fitted to the cover member.

Patent document 5 discloses an inner body through which cold water flows from a drain opening, a deodorization lid for closing an opening of an inner pipe at a bottom of the inner body, and an outer body having a bottom portion formed with a drain pipe and configured to cover the inner body by forming a gap with an outer surface of the inner body. The drain water is stored in the inner body and is discharged to the drain pipe through a gap between the cover body and the inner pipe when the drain water is stored to a preset amount.

Patent document 6 discloses a U-shaped piping steam trap having a main body, and an outlet portion of the main body is coupled to the main body by a coupling nut. The U-shaped pipe trap is completely covered by the cover. Also, it is described that the cover is preferably made non-transparent in the case where the piping steam trap is made transparent.

Documents of the prior art

Patent document

Patent document 1: international publication No. 2007/116531

Patent document 2: JP-A-53-9761

Patent document 3: JP-A2-106087

Patent document 4: japanese laid-open patent publication No. 2002-322706

Patent document 5: JP-A-53-29549

Patent document 6: japanese unexamined patent publication Hei 10-82085

Disclosure of Invention

Problems to be solved by the invention

In the case of the drainage trap described in patent documents 2 to 3, the outer surface of the drainage trap is covered with a foamed resin. Therefore, if a detachable partition body is provided therein like the drainage trap described in patent document 1, this will hinder visual recognition of the inside of the body portion. In addition, in the case of a steam trap having no separator or having a non-detachable separator (such as the pipe steam trap described in patent documents 4 to 6), if the outer surface coated with the foamed resin is provided in this way, the visual recognition of the inside of the drain steam trap is hindered. Therefore, it is not possible to confirm that the inner surfaces of the body portion and the partition body are contaminated, and there is a problem in maintenance. Further, as described in patent document 6, when the entire outer surface of the drain trap is covered with the cover material, the entire cover material needs to be removed at the time of maintenance, and therefore, the heat insulating function cannot be exhibited. Further, the foamed resin may be damaged and fail to exhibit a desired heat insulating function under a severe use environment because the foamed resin has insufficient durability.

Accordingly, there is a need for a drain trap that is easy to maintain, but has high durability and dew condensation prevention.

Means for solving the problems

The drainage steam trap according to the present disclosure is characterized by including: a cylindrical body portion having a side wall formed with a receiving pipe portion for receiving a liquid and a discharge pipe portion for discharging the liquid; an attachable/detachable partition body that partitions an inner space of the body part into a storage space communicating with the receiving pipe part and for storing the liquid and a discharge space communicating with the discharge pipe part and for discharging the liquid; a cover portion for closing off the internal space of the body portion; and a sealing case surrounding at least an outer surface of a portion of the body portion in which the storage space is formed in a sealed state; a gap is formed between the seal housing and the body portion; the sealed housing and the body portion are formed to be transparent; and the cover portion is attachable/detachable in a state where the sealing case is mounted on the body portion.

According to the present configuration, a gap is formed between the seal case and the body portion, wherein the seal case surrounds at least an outer surface of a portion of the body portion where the storage space is formed in a sealed state. Therefore, even in the case where there is a temperature difference between the liquid stored in the storage space of the body portion and the ambient air, the occurrence of dew condensation can be suppressed by the gap. As a result, inconvenience such as water immersion in the surroundings due to the drop of water droplets can be prevented. Further, since such a sealed housing can be configured integrally with the body portion, the configuration of the present invention provides excellent aesthetic appearance and higher durability as compared to the conventional foamed resin. Therefore, the drain trap can be used for a prolonged period of time.

In addition, if both the seal case and the body portion are provided to be transparent as in the above-described invention configuration, the visibility of the internal space of the body portion can be improved, so that the degree of contamination formed on the inner surfaces of the body portion and the partition body can be confirmed. In addition, in a state where the seal housing is mounted on the body portion, if the lid portion is configured to be attachable/detachable, the lid portion can be detached with dew condensation prevented, an attachable/detachable partition body and the like can be cleaned, and thus maintenance can be extremely facilitated. However, in the case where a drain trap installed in a drain pipe of an air conditioner is contaminated or clogged, it is the case that a drain pan in the air conditioner is contaminated. Therefore, if the contamination inside the air conditioner is left alone, the drain pan may be eventually clogged to cause water to leak from the air conditioner body. However, in order to check the degree of contamination of the drain pan, it is necessary to disassemble the air conditioner mounted on the ceiling or the like, and this requires great labor and time. On the other hand, if the sealing case and the body portion are formed to be transparent as in the above-described configuration of the present invention, the degree of contamination of the drain trap can be easily checked by visual recognition, and thus it can be judged whether or not it is necessary to clean the drain pan of the air conditioner body. Therefore, water leakage due to the dredging of the clean drain pan can be prevented. In this way, a drain trap that is easy to maintain, and that can prevent dew condensation and has high durability can be provided.

According to another feature, the connection between the side wall and the receiving pipe portion and the connection between the side wall and the discharge pipe portion are covered by the seal housing with a gap formed therebetween.

The liquid tends to accumulate and settle at the connection of the side wall with the receiving/discharge pipe portion. Therefore, in the above-described arrangement, when the gap is formed between the corresponding connecting portion and the seal housing, it is possible to prevent the formation of dew condensation on the surfaces of the receiving pipe portion and the discharge pipe portion in this reliable manner.

According to another feature, the seal housing is formed as a plurality of separate bodies.

If the seal housing is constituted as a divided body in the above-described arrangement, the seal housing can be easily mounted to the body portion even in the case where the drain trap has a complicated shape in which the receiving pipe portion and the discharge pipe portion are formed at the body portion.

Drawings

FIG. 1 is a longitudinal cross-sectional view of a drainage trap;

FIG. 2 is a sectional view taken along line II-II of FIG. 1;

FIG. 3 is a sectional view taken along line III-III of FIG. 1;

FIG. 4 is an exterior perspective view of the drainage trap;

FIG. 5 is an exploded perspective view of the drain trap;

FIG. 6 is a longitudinal cross-sectional view of a drainage trap according to other embodiments;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 6;

FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 6;

fig. 9 is an exploded perspective view of a drain trap according to another embodiment.

Detailed Description

Next, embodiments of a drainage trap related to the present disclosure will be described with reference to the accompanying drawings. However, it is to be understood that the present invention is not limited to the following embodiments, and various modifications may be made within the scope not departing from the essence of the present invention.

As shown in fig. 1 to 5, the drain trap X includes: a body part 5 in the form of a bottomed cylinder, the body part 5 having a side wall 51 formed with a receiving pipe portion 2 for receiving liquid and a discharge pipe portion 3 for discharging liquid; a lid portion 6, the lid portion 6 for closing off the internal space 4 of the body portion 5; a partition body 1, the partition body 1 for partitioning the inner space 4 into a storage space 7 and a discharge space 8, the storage space 7 for receiving the liquid from the receiving pipe portion 2 and for storing the liquid in the storage space 7, the discharge space 8 communicating with the discharge pipe portion 3 and for discharging the liquid. Further, the drain trap X further includes a seal case 9, and the seal case 9 surrounds at least a part of the side wall 51 of the body portion 5 and the bottom 52 of the body portion 5 (at least a part of the outer surface of the body portion 5 where the storage space 7 is formed) in a sealed state. In the discussion that follows, the lid portion 6 side may sometimes be referred to as the "upper" side, and the bottom portion 52 side of the body portion 5 may sometimes be referred to as the "lower" side, respectively.

The body portion 5 is formed using a resin material, and is formed in a cylindrical shape with the bottom portion 52 being planar. The receiving pipe portion 2 and the discharging pipe portion 3 are formed integrally with the side wall 51 as a passage extending in the horizontal direction, and the receiving pipe portion 2 and the discharging pipe portion 3 are connected at opposite positions of the side wall 51 of the body portion 5. In addition, the connection portion 2A of the receiving tube part 2 and the connection portion 3A of the discharge tube part 3 have a height difference therebetween, so that the receiving tube part 2 is formed higher than the discharge tube part 3 by a minute preset value (e.g., 5 mm). As shown in the longitudinal sectional view (side view) shown in fig. 1, the tube axial direction Y of the receiving tube portion 2 and the tube axial direction Y of the discharging tube portion 3 are vertically displaced in parallel with each other, but coincide with each other as viewed in the transverse sectional view (top view) shown in fig. 2. By providing a height difference between the receiving pipe portion 2 and the discharge pipe portion 3 as described above, the arrangement enables a smooth flow of liquid from the receiving pipe portion 2 to the discharge pipe portion 3.

Of the outer surface of the side wall 51 of the body portion 5, a face oriented perpendicularly to the direction of connection of the receiving pipe portion 2 and the discharge pipe portion 3 is formed as a flat face 51a (refer to fig. 4 and 5). In addition, an inclined step portion 51b is provided on the outer surface of the side wall 51, the inclined step portion 51b is inclined from the upper side of the receiving pipe portion 2 toward the lower side of the discharging pipe portion 3, and the lid portion 6 side of the inclined step portion 51b has a larger diameter than the bottom portion 52 side of the inclined step portion 51 b.

The lid portion 6 is circular in a plan view and can be attached to the body portion 5 by screw engagement of screw portions 18 formed on the outer peripheral surface of the body portion 5 and the inner peripheral surface of the lid portion 6 (see fig. 1). In addition, a plurality of convex portions 6a which are arranged at equal intervals and protrude outward in the radial direction are formed on the outer periphery of the cover portion 6. By catching the user's fingers on the projections 6a, the user can easily attach the lid portion 6 to the body portion 5 (see fig. 4). The lid portion 6 is configured to be attachable/detachable when the seal housing 9 is mounted on the body portion 5.

A reflector 23 (e.g., a reflective tape) is attached to the outer side of the cover portion 6 along the entire circumference in the circumferential direction thereof (see fig. 4 and 5). Thus, when the drain trap X is mounted on the ceiling, the worker can easily recognize the installation position of the drain trap X by irradiating the reflector 23 with light. Various paths may be provided in addition to the drainage path in which the drainage trap X is installed. In this case, for example, the reflector 23 included in the drainage trap X can be set to red, while the member provided on the other path can be set to yellow, so that the reflectors of the respective paths can be color-distinguished.

The separator 1 includes a first separator 10 and a second separator 11, the first separator 10 being cylindrical, and the second separator 11 being plate-shaped and extending outward from the first separator 10 in the circumferential direction. The first separator 10 has a cutout portion 12 and a rectangular opening portion 13, and the cutout portion 12 is formed by cutting out a part of the first separator 10 in the circumferential direction in the vertical direction from a region located above the second separator 11 (see fig. 5). The opening 13 is disposed at a position opposite to the notch 12. The second division body 11 is inclined along the entire circumference of the first division body 10 such that a part of the cutout portion 12 near the lower end position thereof is located at the lowermost position and a part of the opening portion 13 near the middle position thereof is located at the uppermost position (refer to fig. 1).

The partition body 1 is attachable/detachable to/from the internal space 4 of the body part 5, and when the partition body 1 is attached to the internal space 4 of the body part 5, the partition body 1 partitions the internal space 4 of the body part in such a manner that a lower side of the internal space 4 of the body part 5 is formed as the storage space 7 and an upper side of the internal space 4 of the body part 5 is formed as the discharge space 8. When the partition body 1 partitions the internal space 5 in the above-described manner, the bottom 52 of the body portion 5 as a whole is set as the storage space 7. In addition, the partition body 1 includes a valve body 15 and a valve seat 16, the valve body 15 being spherical, the valve body 15 floating to allow the liquid to flow from the storage space 7 to the discharge space 8 when the storage amount of the liquid in the storage space 7 exceeds a predetermined amount, and the valve seat 16 supporting and supporting the valve body 15. The valve seat 16 is formed in a ring shape and disposed in the inner space of the first separator 10. The valve body 15 is constructed in a normally closed type for closing an opening portion of the annular valve seat 16.

As shown by the two-dot chain line in fig. 1, when the storage amount of the liquid in the storage space 7 exceeds a preset amount, the valve body 15 will float off the valve body 16 to open the valve, whereby the liquid flows from the storage space 7 to the discharge space 8 to be discharged from the discharge pipe portion 3. However, when the amount of liquid in the storage space 7 is less than a preset amount, the valve body 15 is lowered to be seated on the valve seat 16, thereby closing the valve. During this action, the inner peripheral surface of the first partition body 10 guides the upward floating movement and the downward moving movement of the valve body 15 in the vertical direction.

The valve seat 16 is provided in the partition body 1 so that the valve seat 16 can be located at a position lower than the lower end portion 3a of the discharge pipe portion 3 when the partition body 1 is mounted in the internal space 4 of the body portion 5. That is, a time lag (or time difference) is provided from when the valve body 15 floats from the valve seat 16 to when the liquid is discharged from the discharge pipe portion 3. This time difference is intended to suppress the generation of noise by restricting the repetition of the floating movement of the valve body 15 away from the valve seat 16 and the descending movement of the valve body 15 toward the valve seat 16 in a short time even in the case where the amount of liquid flowing from the receiving pipe portion 2 into the storage space 7 is small.

In addition, the valve seat 16 is disposed on the upper side in the vertical direction than the lower end portion of the first partition 10, and the first partition 10 has a hanging portion 10a extending downward more than the valve seat 16. By providing the hanging-down portion 10a, the storage space 7 is formed as a U-shaped flow path that is inverted (turned) at the bottom 53 of the body portion 5, so that the storage space 7 is water-sealed with the liquid stored in the storage space 7. In addition, since the storage space 7 is provided on the bottom 52 side of the body portion 5, the storage space 7 can be always sealed with the liquid stored in the storage space 7 every time the valve body 15 floats up from the valve seat 16.

Between the cover portion 6 and the partition body 1 installed in the internal space 4, a shielding member 17 is provided, the shielding member 17 closely fitting to the cover portion 6 and having a reduced friction coefficient with respect to the partition body 1. The protective member 17 is formed as a "disc" made of resin (e.g., silicone). In addition, the upper surface of the protective member 17 that contacts the lid portion 6 is brought into close contact with the back surface of the lid portion 6 by suction. In addition, the lower surface of the shield member 17, which is in contact with the partition body 1 installed in the internal space 4, is subjected to a smoothing treatment, thereby reducing the coefficient of friction between the lower surface of the shield member 17 and the partition body 1.

The partition body 1 and the side wall 51 of the body portion 5 are provided with the seal portions 14, respectively, and are mounted on the body portion 5 through the lid portion 6 such that the seal portions 14 are subjected to a vertical pressing force from the lid portion 6, and a part of the partition body 1 is brought into close contact with the entire periphery of the side wall 51 by a component force in the vertical direction being applied. The seal portion 14 includes a body-side seal portion 14a formed on the side wall 51 of the body portion 5 and a separator-side seal portion 14b formed on the separator 1.

The body-side seal portion 14a is a stepped portion that protrudes inward from the side wall 51 and is provided on the entire circumference of the side wall 51. Also, the stepped portion constituting the body-side seal portion 14a has an inclination such that the vicinity of the upper end position of the receiving pipe portion 2 is positioned uppermost and the vicinity of the lower end position of the discharge pipe portion 3 is positioned lowermost in the circumferential direction of the body portion 5. The separator-side seal portion 14b is an outer end portion of the second separator 11 that is inclined over the entire circumference of the separator 1 in the circumferential direction. In addition, the partition body side seal portion 14b is provided with a resin member 20 (e.g., an elastomer resin), and the resin member 20 sandwiches the partition body side seal portion 14b from the upper and lower sides thereof.

In a state where the division body 1 is mounted in the internal space 4 of the body part 5, the lid part 6 is mounted on the body part 5 by interposing the shielding member 17 between the lid part 6 and the division body 1 and by screw-coupling with the screw part 18. Thus, the lid portion 6 will press the partition body 1 downward, whereby the body-side seal portion 14a and the partition body-side seal portion 14b receive a downward pressing force. Then, the body-side seal portion 14a and the partition-side seal portion 14b are pressed and tightly fitted on the body-side seal portion 14a by the above-described downward pressing force. In this way, the storage space 7 and the discharge space 8 can be isolated by the close fitting of the partition side seal portion 14b and the body side seal portion 14a over the entire circumference of the inner surface of the side wall 51 of the body portion 5.

A height adjusting member 21 is provided on the resin member 20 of the partition side sealing portion 14b, and when the partition body 1 is mounted in the internal space 4, the height adjusting member 21 causes a portion 8a of the discharge pipe portion 3 of the discharge space 8 facing the side wall 51 to be located at the same height as the lower end portion 3a of the discharge pipe portion 3. At a position corresponding to the discharge pipe portion 3 in the circumferential direction of the side wall 51 of the body portion 5, a stepped portion constituting the body-side seal portion 14a is located below the lower end portion 3a of the discharge pipe portion 3. Therefore, when the partition body 1 is installed in the internal space 4, a portion 8a of the discharge space 8 toward the discharge pipe portion 3 is located at a position lower than the lower end portion 3a of the discharge pipe portion 3. Here, by forming the height adjusting member 21, the storage of the liquid at a portion of the discharge space 8 toward the discharge pipe portion 3 is restricted, thereby suppressing the occurrence of corrosion of the liquid. In addition, the resin member 20 provided on the partition side seal portion 14b may also serve as the height adjusting member 21.

As shown in fig. 5, the division body 1 is provided with a leg 19, and the leg 19 protrudes downward from the internal space 4 when the division body 1 is connected in the internal space 4. A plurality of such legs 19 are arranged at equal intervals in the circumferential direction of the first separator 10. With this arrangement, when the division body 1 in the vertically inverted state is inserted into the internal space, the leg 19 will protrude upward from the internal space 4, so that the cover portion 6 cannot be connected to the body portion 5 in this case. Thus, when the division body 1 is inserted into the internal space 4, an error of the division body 1 in the vertical direction is prevented.

The body portion 5 and the partition body 1 are made transparent, and the valve body 15 is provided with a color (for example, cyan) that can be distinguished from the body portion 5 and the partition body 1. With this arrangement, in the case of mounting the partition body 1 in the internal space 4 of the body portion 5, the operator can visually recognize the position of the valve body 15 from the outside of the body portion 5. Therefore, it is possible to easily check whether the division body is mounted in place and also to check the degree of contamination of the division body 1. Here, the term "transparent" means that the inside of the body portion 5 is in a state of being seen through, and therefore the term "transparent" includes colorless transparency and colored transparency, and even includes translucency.

As shown in fig. 1, the sealing case 9 is mounted on the outside of the body portion 5, and is formed of the same transparent resin material as the body portion 5. The seal case 9 surrounds the side wall 51 of the body portion 5 and the bottom 52 of the body portion 5 in a sealed state in the entire region thereof; and a gap 91 is formed between the seal housing 9 and the body portion 5. With this arrangement, even when there is a temperature difference between the liquid stored in the storage space 7 on the bottom portion 52 side of the body portion 5 and the ambient air, the occurrence of dew condensation can be effectively suppressed by the gap 91. In addition, the connection portion 2A between the side wall 51 and the receiving pipe portion 2 and the connection portion 3A between the side wall 51 and the discharge pipe portion 3 are covered by the seal case 9, and a gap 91 is formed with respect to the seal case 9. The liquid tends to accumulate and stay at the connecting portion 2A of the receiving pipe portion 2 and the side wall 51 or the connecting portion 3A of the discharge pipe portion 3 and the side wall 51. Then, if the gap 91 is formed between these respective connecting

portions

2A, 3A and the seal housing 9 provided in the above-described arrangement, it is possible to prevent the occurrence of dew condensation on the surfaces of the receiving pipe portion 2 and the discharging pipe portion 3 in this reliable manner.

In this way, since the sealing case 9 is formed of the same transparent resin material as the body portion 5, the transmittance of the sealing case 9 is the same as that of the body portion 5, and air also exists between the sealing case 9 and the body portion 5 as described above. Therefore, the worker can easily recognize the position of the valve body 15 from the outside of the body portion 5. Meanwhile, when the drain trap X installed in the drain pipe of the air conditioner is contaminated or clogged, it is a case that the drain pan inside the air conditioner is contaminated. If left unchecked with contaminants within the air conditioning body, the drain pan eventually clogs causing water to leak out of the air conditioning body. However, in order to check the degree of contamination of such a drain pan, it is necessary to disassemble the air conditioner mounted on the ceiling or the like, and this requires great labor and time. Then, if both the seal housing 9 and the body portion 5 are made transparent in the arrangement as described above, the degree of contamination of the drain trap X can be easily checked visually, and it can be judged whether or not the drain pan of the air conditioner body needs to be cleaned. Therefore, water leakage due to the dredging of the clean drain pan can be prevented.

The seal case 9 includes: a plurality of (two in the present embodiment) split bodies 92 separated from each other; a bottom side connecting member 93 (an example of a "first connecting member"), the bottom side connecting member 93 being cup-shaped and for connecting the pair of divided bodies 92 from the bottom 52 side (the storage space 7 side); a cover part side connecting member 94 (an example of the "second connecting member") which is a circular cylindrical shape and which is used to connect the pair of split bodies 92 from the cover part 6 side (the side opposite to the bottom side connecting member 93) (refer to fig. 4 and 5).

The divided body 92 is composed of a first divided body 92A and a second divided body 92B. The first and second divided

bodies

92A and 92B are formed symmetrically with respect to the pipe axial direction Y of the receiving pipe portion 2 and the discharge pipe portion 3 (see fig. 2). That is, the first and

second segments

92A and 92B are coupled to each other from the side of the main body portion 5 to form a half-split shape. As shown in fig. 5, each of the first and second divided

bodies

92A and 92B includes: a flat joint surface 92a extending in the tube axial direction Y; a first close-contact surface 92b having an arc shape and closely contacting the outer peripheral surface of the pipe receiving portion 2; and a second contact surface 92c having an arc shape, the second contact surface 92c being in close contact with the outer peripheral surface of the discharge pipe portion 3. The first and

second segments

92A and 92B are formed with a recess 92A1 and a projection 92A2 along the joint surface 92A, respectively, and the segments 92 are assembled with each other by fitting the recess 92A1 and the projection 92A 2. Further, the fitting between these concave portions 92a1 and convex portions 92a2 forms a labyrinth structure for preventing air in the gap 91 from leaking to the outside. In addition, the first and second contact surfaces 92b and 92c are in close contact with the outer circumferential surfaces of the receiving pipe portion 2 and the discharge pipe portion 3, respectively, and also serve to prevent the air in the gap 91 from leaking to the outside.

As shown in fig. 3 and 5, flat surfaces 92d are formed on the inner surfaces of the first and second divided

bodies

92A and 92B, respectively, the flat inner surfaces of the first and second divided

bodies

92A and 92B opposing the flat surface 51a of the body portion 5 are flat surfaces 92d, and the outer surface of the portion where the flat surface 92d is formed is also configured with a flat surface 92 e. In addition, engaging stepped portions 92f are formed on the bottom portions of the first and second divided

bodies

92A and 92B, respectively, the engaging stepped portions 92f being stepped portions receding inward in the radial direction from the outer surface of the bottom portions, and engaging with the bottom portion side connecting member 93. The flat surface 92e is continuously formed on the outer surface of the engagement stepped portion 92f, and the sectional shape of the bottom portion of the divided body 92 is formed in a circular shape having a pair of straight side portions opposed to each other. An engagement recess 92f1 is formed on a linear portion of the outer surface of the engagement stepped portion 92f, and this engagement recess 92f1 is engaged with the engagement protrusion 93a of the bottom-side connecting member 93. Since the sectional shape of the bottom of the split body 92 is formed in a circular shape having a pair of opposite linear side portions, the bottom side connecting member 93 engaged with the engaging stepped portion 92f is prevented from rotating.

Annular seal surfaces 92g that protrude radially inward in an annular shape are formed at the upper ends of the first and

second split bodies

92A and 92B, respectively. By the annular seal surface 92g and the outer surface of the body portion 5 being in close contact with each other, air in the gap 91 is prevented from leaking to the outside. In addition, engagement recesses 92h are formed on outer surfaces of upper ends of the first and second divided

bodies

92A and 92B, respectively, and the engagement recesses 92h are engaged with the first engagement protrusions 94a of the cover portion side connecting member 94.

The bottom side connecting member 93 is formed in a cup shape and has a bottom wall 93A and a side wall 93B annularly protruding from an outer periphery of the bottom wall 93A. The side wall 93B has a shape extending along the side shape of the bottom of the split body 92. The pair of divided bodies 92 are connected by connecting the bottom side connecting member 93 to the bottoms of the pair of divided bodies 92 joined to each other. At this time, the engagement projection 93A formed on the side wall 93B is engaged in the engagement recess 92f1 of the split body 92, and a gap 95 is formed between the bottom of the split body 92 and the bottom wall 93A. The gap 95 is filled with air in the same manner as the gap 91.

The lid-part-side connecting member 94 is formed in an annular cylindrical shape and has an annular flange portion 94A and an upright portion 94B, the inner diameter of the annular flange portion 94A is larger than the outer diameter of the main body portion 5, and the upright portion 94B is provided upright from the outer periphery of the flange portion 94A toward the bottom portion 52 side. The lower surface (inner surface) of flange 94A contacts the upper surface of divided body 92. A first engaging projection 94a is formed on the base end side of the standing portion 94B, the first engaging projection 94a being engaged with the engaging recess 92h of the split body 92, and a second engaging projection 94B is formed on the tip end side of the standing portion 94B, the second engaging projection 94B being engaged with the upper end of the flat surface 92e of the split body 92. When the first engaging projection 94a and the second engaging projection 94b are engaged with the split body 92, the cover part side connecting member 94 is firmly fixed to the split body 92.

In the present embodiment, since the gap 91 is formed between the seal case 9 surrounding the entire area of the side wall 51 and the bottom 52 of the body portion 5 and the body portion 5, even in the case where there is a temperature difference between the liquid stored in the storage space 7 on the bottom 52 side of the body portion 5 and the ambient air, the occurrence of dew condensation can be effectively suppressed by the gap 91. As a result, inconvenience such as water droplets falling and flooding of the surroundings can be prevented. In addition, since the bottom portion 52 side of the body portion 5 is provided as the liquid storage space 7, the provision of the gap 95 formed between the bottom portion of the divided body 92 and the bottom wall 93A of the bottom portion side connecting member 93 as provided in the present embodiment will enhance the heat retaining effect by the gap 91 and the gap 95, so that the liquid can be prevented from freezing. In addition, since the liquid is likely to be retained at the connecting portion 2A of the receiving pipe portion 2 and the side wall 51 or the connecting portion 3A of the discharge pipe portion 3 and the side wall 51, when the gap 91 is formed between the connecting

portions

2A, 3A and the seal case 9 as described in the present embodiment, the formation of dew condensation on the surface of the receiving pipe portion 2 or the discharge pipe portion 3 can be reliably prevented. Moreover, in the seal housing 9 of the present embodiment, since the seal housing 9 forms an integral unit having a continuous appearance with the body portion 5, it has an excellent aesthetic appearance and high durability, and thus the drain trap X can be used for a long period of time.

As provided in the present embodiment, if the joint surfaces 92a of the split bodies 92 are arranged in the pipe axial direction Y of the receiving pipe portion 2 and the discharging pipe portion 3, the hermetic case 9 can be attached from the sides of the receiving pipe portion 2 and the discharging pipe portion 3, and therefore, the attachment is easy to achieve. In addition, when the gap 91 is formed between the seal housing 9 and the body portion 5, the bottom portion side connecting member 93 and the cover portion side connecting member 94 are provided on the bottom portion side and the cover portion side, respectively, and the manufacturing of the drain trap X is extremely easy.

[ other embodiments ]

(1) Fig. 6 to 9 show a drainage trap X according to another embodiment. For easy understanding, the same names, reference numerals, and the like are used for the same members hereinafter, and only different configurations are explained. In the hermetic case 9 of the present embodiment, the arc-shaped first close contact surface 92b and the arc-shaped second close contact surface 92c are respectively in close contact with the intermediate portions of the receiving pipe portion 2 and the discharge pipe portion 3 in the pipe axial direction Y, the first close contact surface 92b is in close contact with the outer peripheral surface of the receiving pipe portion 2, and the second close contact surface 92c is in close contact with the outer peripheral surface of the discharge pipe portion 3. With this arrangement, a larger gap 91 can be obtained between the seal case 9 and the reception pipe portion 2 or the discharge pipe portion 3 in the body portion 5, and therefore dew condensation on the surface of the reception pipe portion 2 or the discharge pipe portion 3 can be more reliably prevented.

In the present embodiment, the joining form (type) between the split body 92 and the cover-part-side connecting member 94 is different. Specifically, an engaging recess 92i is provided on the outer surface of the upper ends of the first and

second split bodies

92A and 92B, and an engaging protrusion 94c is provided on the base end side of the standing portion 94B of the cover portion side connecting member 94. Then, when the engagement recess 92i and the engagement projection 94c are engaged with each other, the cover part side connecting member 94 is fixed to the split body 92 (refer to fig. 8 and 9). That is, unlike the above-described embodiment, the second engaging projection 94B that engages with the upper end of the flat surface 92e of the divided body 92 is not provided on the tip end side of the standing portion 94B. In this case as well, when the lid portion 6 is screwed with the body portion 5, the lid portion 6 presses the lid-portion-side connecting member 94 downward, so that the lid-portion-side connecting member 94 can be firmly fixed to the split body 92. In the present embodiment, the joining form (type) between the divided body 92 and the bottom side connecting member 93 is different. Specifically, the engagement protrusion 93a of the bottom side connecting member 93 in the above embodiment is replaced with the engagement recess 93a1, and the engagement recess 92f1 of the split body 92 is replaced with the engagement protrusion 92f 2.

(2) A heat insulating plate may be mounted in a gap 95 formed between the bottom of the divided body 92 and the bottom wall 93A of the bottom side connecting member 93. The heat insulating board is made of a heat insulating material such as aluminum or a laminated material in which the surface of a laminated resin layer is covered with aluminum. Since the bottom 52 side of the body portion 5 is provided as the storage space 7, if a heat insulating plate is provided on the bottom side connecting member 93 arranged on the bottom 52 side of the body portion 5, it is possible to prevent the liquid inside the storage space 7 from freezing. Moreover, in the case where the heat insulating plate is disposed on the bottom portion 52 side of the body portion 5, visibility to the internal space 4 of the body portion 5 is not obstructed.

(3) A moisture absorbent may be disposed instead of or in addition to the insulation board installed in the gap 95. In this case, even when the high-humidity air is sealed in the gap 95, dew condensation inside the gap 95 can be prevented. As a result, the thermal conductivity is reduced, and the dew condensation preventing effect is improved.

(4) The sealing case 9 may be provided only on the storage space 7 portion. That is, the seal housing 9 may be oppositely provided in the side wall 51 of the body portion 5 on the lower side of the inclined step portion 51 b. Further, the seal case 9 may be provided at a position lower than the receiving pipe portion 2 and the discharge pipe portion 3 in the side wall 51 of the opposite body portion 5, which is not particularly limited.

(5) In the above, the split body 92 of the seal housing 9 is formed symmetrically with respect to the pipe axial direction Y of the receiving pipe portion 2 and the discharge pipe portion 3. Alternatively, the split body 92 of the seal housing 9 may be split into two in the vertical direction.

(6) The sealing member may be provided on the engagement surface 92a or the abutting

surfaces

92b, 92 c.

(7) The void 91 and gap 95 may be evacuated.

(8) The cover portion 6 can be omitted so that the partition body 1 is made non-detachable.

(9) In the above embodiment, the lid portion 6 is configured to be mounted on the body portion 5 by the threaded engagement of the threaded portion 18. Alternatively, the lid portion 6 may be configured as a fitting type, connected to the body portion 5 by pressing the lid portion 6 into the body portion 5 to be joined. That is, various modifications are possible as to how the lid portion 6 is attached to the body portion 5.

(10) In the above embodiment, the bottom of the body portion 5 is formed in a flat surface shape, and therefore the entire bottom of the body portion 5 is formed as the storage space 7. Alternatively, the entire bottom of the body portion 5 may be provided as the storage space 7, and various modifications may be made to the shape of the bottom of the body portion 5, such as a step formed in the bottom of the body portion 5.

(11) In the above embodiment, the shape of the side wall 51 of the body portion 5 and the shape of the partition body 1 are formed in a substantially elliptical shape in a plan view. Alternatively, they may be formed in a rectangular shape or the like, and various changes may be made to the shape provided.

(12) In the above embodiment, a spherical body is taken as an example of the valve body 15. Alternatively, the valve body 15 may be provided in the form of a plate-like body that is pivotable about a horizontal axis. In this way, appropriate deformation may be made as to what form the valve body 15 takes.

Industrial applicability

The present invention is applicable as a drain trap comprising a cylindrical body having an inner space communicating with a receiving pipe portion and a discharge pipe portion, and a partition dividing the inner space of the body into a storage space and a discharge space.

Description of the reference numerals

1: partition body

2: receiving tube part

3: discharge pipe section

4: inner space

5: body part

51: side wall

6: cover part

7: storage space

8: discharge space

9: sealed shell

91: voids

92: partition body

X: drainage steam trap

Claims

1. A drainage trap comprising:

a cylindrical body portion having a side wall formed with a receiving pipe portion for receiving a liquid and a discharge pipe portion for discharging the liquid;

an attachable/detachable partition body that partitions an inner space of the body part into a storage space communicating with the receiving pipe part and for storing the liquid and a discharge space communicating with the discharge pipe part and for discharging the liquid;

a cover portion that closes off the internal space of the body portion; and

a sealing case surrounding at least an outer surface of a portion of the body portion in which the storage space is formed in a sealed state;

a gap is formed between the seal housing and the body portion,

the sealed housing and the body portion are formed to be transparent,

the cover portion is attachable/detachable in a state where the hermetic case is mounted on the body portion.

2. The drainage trap of claim 1 wherein the connection between the sidewall and the receiving pipe portion and the connection between the sidewall and the discharge pipe portion are covered by the seal housing with a gap formed therebetween.

3. The drain trap of claim 1 or 2, wherein the seal housing is configured as a plurality of separate bodies separated from each other.