JP6159622B2 - steam trap - Google Patents

Description

  The present invention relates to a steam trap that automatically discharges condensate condensed from steam generated in steam piping systems such as steam transport pipes and steam-using equipment from the orifice to the outside of the system. It is related with the thing provided with the cleaning member to do.

  2. Description of the Related Art As a steam trap that discharges condensate from an orifice to the outside, a so-called orifice type steam trap is known that includes a cleaning member that removes foreign substances that adhere to and accumulate on the orifice.

  In Patent Document 1, an orifice having an opening area smaller than the condensate discharge hole is formed on the downstream side of the condensate discharge hole, and a rolling member partially positioned at the upstream end of the orifice passes through the orifice. A condensate discharge device arranged in this manner is disclosed. Since an orifice with a smaller opening area than the condensate discharge hole is formed on the downstream side of the condensate discharge hole, the pressure of the condensate discharge hole is maintained at a high pressure close to the pressure on the upstream side, and the condensate is condensed. The discharge hole gently flows down, and metal ions do not adhere to the surface of the condensate discharge hole. Further, the metal ion salt or oxide adhering to the surface of the orifice is removed by a rolling member that rolls in the condensate flow.

  Patent Document 2 discloses an orifice type steam trap in which an orifice is provided in a partition between an inlet and an outlet formed in a trap casing, and condensate on the inlet side is discharged from the orifice to the outlet side. A cleaning member is provided for removing foreign matter from the orifice by moving back and forth in the axial direction of the orifice by screw advancement and retraction operation from the outside of the trap casing with respect to a screw portion formed in the trap casing.

  Patent Documents 3 and 4 disclose so-called disc-type steam traps having a valve disc, which have a rolling member that rolls when the valve disc opens and fluid passes through. The member is configured to remove foreign substances that try to narrow the outlet passage.

  Patent Document 5 discloses an auto drain device equipped with a needle valve for opening and closing an exhaust orifice and a pin for cleaning the exhaust orifice.

Japanese Patent Laid-Open No. 9-303686 (published on November 28, 1997) JP 2008-309290 A (published December 25, 2008) JP-A-6-58496 (published on March 1, 1994) JP-A-6-94191 (published April 5, 1994) JP-A-8-28789 (published February 2, 1996)

  However, the conventional technology as described above has a problem that in the orifice type steam trap, the foreign matter adhering to the condensate inflow side of the orifice plate provided with the orifice cannot be removed.

  Accordingly, the present invention has been made in view of the above-described problems, and the purpose thereof is not only foreign matter adhering to and depositing on the orifice, but also foreign matter adhering to and depositing on the surface on the fluid inflow side of the orifice plate provided with the orifice. Another object of the present invention is to provide an orifice type steam trap that can also remove the above.

In order to solve the above problems, the steam trap according to the present invention is
An orifice plate provided with an orifice, with the fluid inflow side on the top side and the fluid outflow side on the ground side, and
A cleaning member having a first foreign matter removing body loosely inserted in the orifice for removing foreign matter attached to the orifice and a second foreign matter removing body for removing foreign matter attached to the fluid inflow side surface. It is characterized by having.

  According to the above configuration, not only the foreign matter adhering to the orifice is removed by the first foreign matter exclusion body loosely inserted into the orifice but also attached to the fluid inflow side surface of the orifice plate by the second foreign matter exclusion body. It is possible to provide an orifice type steam trap capable of removing accumulated foreign matter.

  Therefore, it is possible to provide a steam trap that is less likely to cause clogging of the orifice and that does not require maintenance for a long time.

  The “foreign matter” in the present specification is a metal ion salt or metal oxide contained in the condensate flowing through the steam trap, or rust flowing from the upstream of the steam trap.

In addition to the above-described configuration, the steam trap according to the present invention includes:
The cleaning member is hooked on the surface on the fluid inflow side,
It is preferable that the second foreign matter exclusion body is movably in contact with the fluid inflow side surface.

  According to said structure, a cleaning member can be arrange | positioned by the simple method of hooking on the surface by the side of the fluid inflow of an orifice plate.

  Further, according to the above configuration, since the second foreign matter removing body is movably in contact with the fluid inflow side surface of the orifice plate, the foreign matter adhering to the fluid inflow side surface due to the movement and contact is effective. Can be removed.

In addition to the above-described configuration, the steam trap according to the present invention includes:
At the end of the first foreign material exclusion body exposed on the fluid outflow side of the orifice plate, there is provided a structure that changes its position or posture by contacting the fluid that has flowed out of the orifice. Is preferred.

  According to the above configuration, since the structure that changes its position or posture by being in contact with the fluid is provided at the end of the first foreign object remover, the first foreign object remover is interlocked with the structure. The position or posture changes, and the foreign matter adhering to the orifice can be efficiently removed.

In addition to the above-described configuration, the steam trap according to the present invention includes:
It is preferable that the first foreign matter exclusion body is a linear object having a thickness that occupies 50 to 80% of the cross-sectional area of the orifice.

  According to the above configuration, 20 to 50% of the cross-sectional area of the orifice is ensured as a fluid flow path, and the fluid flows out (discharges) even when the first foreign matter exclusion body is loosely inserted into the orifice. It is possible to simultaneously remove the foreign matter adhering to the orifice and discharge the fluid without disturbing the above.

In addition to the above-described configuration, the steam trap according to the present invention includes:
It is preferable that the structure is a cone having a vertex directed toward the top, and a spiral structure is formed on the side surface from the vertex toward the ground.

  According to the above configuration, since the fluid discharged from the orifice flows along the spiral structure formed on the side surface, the structure swings. The position or posture is easy to change, and therefore foreign matter adhering to the orifice can be efficiently removed.

In addition to the above-described configuration, the steam trap according to the present invention includes:
It is preferable that the structure has a plurality of wings.

  According to the above configuration, since the fluid discharged from the orifice strikes the plurality of wings and the structure is shaken, the position or posture of the first foreign object exclusion body is easily changed in conjunction with this. The foreign matter adhering to the orifice can be efficiently removed.

In addition to the above-described configuration, the steam trap according to the present invention includes:
The orifice is formed in the vertical direction,
In the state where the fluid is discharged from the orifice, it is preferable that the first foreign matter exclusion body is inclined with respect to the vertical direction.

  According to the above configuration, while the fluid is being discharged from the orifice, the first foreign object exclusion body having the inclined posture is loosely inserted into the orifice formed in the vertical direction. It is possible to provide a situation in which the first foreign object remover is brought into contact with the opening end portion in a concentrated manner, and foreign matters attached to the opening end portion can be effectively removed.

  The present invention not only removes foreign matter adhering to the orifice by the first foreign matter exclusion body loosely inserted into the orifice, but also adheres and accumulates on the condensate inflow side surface of the orifice by the second foreign matter exclusion body. Therefore, it is possible to provide a steam trap that is less likely to cause clogging of the orifice and that does not require maintenance for a long time.

It is sectional drawing which shows one Embodiment of the steam trap which concerns on this invention. It is sectional drawing which shows the state which the cleaning member comprised in the steam trap shown in FIG. 1 changed the attitude | position. It is the figure which showed the modification of the cleaning member comprised by the steam trap which concerns on this invention. It is the figure which showed the modification of the cleaning member comprised by the steam trap which concerns on this invention. It is the figure which showed the modification of the cleaning member comprised by the steam trap which concerns on this invention.

Embodiment 1
One embodiment of a steam trap according to the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 is a cross-sectional view showing the configuration of the steam trap according to the first embodiment. As shown in FIG. 1, the steam trap 1 includes an upper casing 2, a lower casing 3, an orifice plate 4, a gasket 5, and a cleaning member 6.

  The upper casing 2 and the lower casing 3 constitute an outer shell of the steam trap 1, and each is provided with a flow path. The upper casing 2 and the lower casing 3 are connected by screwing each other, and an internal flow path communicating with the upper casing 2 and the lower casing 3 is formed. In FIG. 1, the upper casing 2 is a male screw having a thread on the outer peripheral surface, and the lower casing 3 is a female screw having a thread on the inner peripheral surface, but the present invention is limited to this. Males and females may be the opposite instead of things.

  The upper casing 2 and the lower casing 3 can be made of a material constituting an outer shell of a general steam trap.

  The orifice plate 4 can be made of, for example, stainless steel (SUS material). The orifice plate 4 is disposed so as to close an opening formed at one end of a flow path provided in the lower casing 3. The diameter of the flow path of the lower casing 3 is larger than the diameter of the opening, and a step 3a corresponding to the difference between these diameters is formed around the opening. The orifice plate 4 has a diameter larger than the diameter of the opening, and is disposed on the flow path side of the stepped portion 3a. In addition, the orifice plate 4 disposed in the step portion 3a is pressed against the end of the upper casing 2 of the female screw on the outer periphery of the surface of the lower casing 3 facing the flow path. That is, the orifice plate 4 is sandwiched between the step 3 a formed around the opening of the lower casing 3 and the end of the upper casing 2.

  The gasket 5 is disposed between the orifice plate 4 and the end of the upper casing 2. The gasket 5 seals the gap between the orifice plate 4 and the end of the upper casing 2, thereby preventing fluid from leaking out.

  The orifice plate 4 may be disposed not between the orifice plate 4 and the end of the upper casing 2 but between the step plate 3 a formed around the opening of the lower casing 3 and the orifice plate 4. . Alternatively, it may be disposed between the orifice plate 4 and the end of the upper casing 2 or between the stepped portion 3 a and the orifice plate 4.

  The orifice plate 4 is provided with a fluid discharge hole 40 (orifice) at the center thereof.

  The fluid discharge hole 40 is a through hole that communicates the flow path of the lower casing 3 and the outside of the steam trap 1, and the fluid inflow surface 41 (surface on the fluid inflow side) facing the flow path of the lower casing 3 in the orifice plate 4. ) Side to the fluid outflow surface 42 (surface on the fluid outflow side) facing the outside of the steam trap 1, which is the back surface of the fluid inflow surface 41. In the present embodiment, there is one fluid discharge hole 40 provided in the orifice plate 4, but the present invention is not limited to this, and a plurality of fluid discharge holes 40 may be provided.

  The steam trap 1 of Embodiment 1 has the orifice plate 4 disposed in the lower casing 3 with the fluid inflow surface 41 of the orifice plate 4 on the top side and the fluid outflow surface 42 on the ground side. 40 penetrates the orifice plate 4 in the vertical direction.

  Hereinafter, the cleaning member 6 which is one of the characteristic configurations of the first embodiment will be described, but before that, as a comparative configuration, the problem of the steam trap that does not include the cleaning member 6 will be described.

<Problem of comparison configuration steam trap>
The steam trap of the comparative configuration is the same as the steam trap of the first embodiment except that the cleaning member 6 included in the steam trap 1 of the first embodiment is not provided.

  When the condensate flowing from the upstream of the steam trap is discharged to the outside using the steam trap of the comparative configuration, it is a metal ion salt or oxide contained in the condensate in the orifice, or from the upstream of the steam trap. The rust that has flowed is deposited as foreign matter. If foreign matter accumulates in the hole, the fluid discharge efficiency is lowered. If left as it is, the hole is blocked by the foreign matter and the condensate cannot be discharged.

  In order to remove this foreign substance in the steam trap having the comparative configuration, for example, the above-described disassembly work and cleaning work of removing the orifice plate from the inside and removing the orifice plate from the inside for cleaning are required. Alternatively, a method may be considered in which an operator inserts a rod-like body into the orifice and cleans it from the outside of the steam trap.

  However, since the foreign matter adheres not only to the hole but also to the fluid inflow surface of the orifice plate, the above-described disassembling work and cleaning work are required to remove the foreign matter.

  In general, a large number of steam traps are provided in order to discharge condensed water condensed from steam generated in a steam piping system such as a steam transport pipe and steam-using equipment to the outside of the system. For this reason, if the worker individually cleans a large number of comparatively configured steam traps, it is very troublesome. The above is the problem of the steam trap of the comparative configuration.

  Therefore, the steam trap 1 of Embodiment 1 includes a cleaning member 6 in order to solve this problem.

  The cleaning member 6 has a first foreign matter exclusion body 61 penetrating the fluid discharge hole 40 of the orifice plate 4, and is a member that hangs on the orifice plate 4 by hooking the upper end portion on the fluid inflow surface 41. It is.

  The first foreign substance exclusion body 61 is a part for removing foreign substances adhering to the fluid discharge hole 40 of the orifice plate 4, and is loosely inserted into the fluid discharge hole 40.

  Further, the cleaning member 6 can remove the foreign matter attached to the fluid inflow surface 41 by the portion hooked on the fluid inflow surface 41. Hereinafter, this portion will be referred to as a second foreign object remover 62.

  The first foreign substance exclusion body 61 and the second foreign substance exclusion body 62 can be realized by bending a linear body such as a wire as shown in FIG. Even if the cleaning member 6 is in contact with the fluid discharged from the fluid discharge hole 40 and at least any one of the first foreign matter exclusion body 61 and the second foreign matter exclusion body 62 takes any position or posture. , It does not detach from the fluid discharge hole 40.

  The cleaning member 6 is not fixed to the orifice plate 4 but is simply hooked. Therefore, when the fluid that has flowed through the flow path of the lower casing 3 comes into contact with the cleaning member 6, the second foreign matter exclusion body 62 moves and can change the contact position with the fluid inflow surface 41. The contact portion 62a (of the foreign object excluding body 62) slides on the fluid inflow surface 41 or moves so as to strike the fluid inflow surface 41 in accordance with the flow velocity and pressure of the fluid. Thereby, the foreign material adhering to the peripheral area | region of the fluid discharge hole 40 in the fluid inflow surface 41 can be excluded. The peripheral region of the fluid discharge hole 40 on the fluid inflow surface 41 is a range of 360 ° with the fluid discharge hole 40 as the center.

  The removal of foreign matter from the peripheral region of the fluid discharge hole 40 is not limited to discharging the foreign matter in the peripheral region of the fluid discharge hole 40 to the outside of the steam trap 1 through the fluid discharge hole 40. This includes moving the foreign matter in the peripheral area to a position far from the fluid discharge hole 40 in the fluid inflow surface 41.

  The first foreign matter exclusion body 61 receives contact with the fluid (condensate) flowing through the fluid discharge hole 40 from the fluid inflow surface 41 side as the position or posture of the second foreign matter exclusion body 62 changes. The position and posture of the fluid discharge hole 40 are changed. For example, it is possible to move in a direction perpendicular to the central axis of the fluid discharge hole 40, or to move in a direction along the central axis, although slightly. Further, the posture may be changed so that the longitudinal direction of the first foreign substance exclusion body 61, that is, the axis (axial center) along the insertion direction is inclined with respect to the central axis of the fluid discharge hole 40. Along with such a change in the position and orientation of the first foreign object remover 61, the contact location between the surface of the first foreign object remover 61 and the inner wall surface of the fluid discharge hole 40 changes. As a result, the foreign matter existing in the fluid discharge hole 40 or the foreign matter adhering to the fluid discharge hole 40 can be eliminated.

  The removal of foreign matter from the fluid discharge hole 40 means that the foreign matter is discharged from the fluid discharge hole 40 to the peripheral region of the fluid discharge hole 40 in addition to discharging the foreign matter to the outside of the steam trap 1 through the fluid discharge hole 40. Including. The foreign matter discharged from the fluid discharge hole 40 to the peripheral region of the fluid discharge hole 40 described above is removed by the second foreign matter removing body 62 as described above.

  The first foreign substance exclusion body 61 can be formed not only from a linear object having a circular or elliptical cross section (for example, a wire) but also from a linear object having a rectangular cross section (for example, a hexagonal cross section).

  The first foreign matter exclusion body 61 is preferably a linear object having a thickness that occupies 50 to 80% of the cross-sectional area of the fluid discharge hole 40. As a result, 20 to 50% of the cross-sectional area of the fluid discharge hole 40 is secured as a fluid flow path, and even when the first foreign matter exclusion body 61 is loosely inserted into the fluid discharge hole 40, the fluid outflow ( The removal of the foreign matter adhering to the fluid discharge hole 40 and the discharge of the fluid can be performed in parallel without disturbing the discharge.

  In addition, the first foreign body exclusion body 61 loosely inserted into the fluid discharge hole 40 has a portion exposed to the flow path on the fluid inflow surface 41 side of the orifice plate 4 and a portion exposed to the outside from the fluid outflow surface 42 side. Have. At the end of the portion exposed to the outside from the fluid outflow surface 42 side, a structure 63 that changes its position or posture by contacting with the fluid that has flowed out from the fluid discharge hole 40 is provided.

  The structure 63 is a member such as a weight hung from the lower end of the cleaning member 6, and is configured to be larger than the diameter of the fluid discharge hole 40 so as to easily come into contact with the fluid discharged from the fluid discharge hole 40. In the first embodiment, the structure 63 is a tubular object as shown in FIG. 1, and the linear object constituting the first foreign substance exclusion body 61 is inserted into the pipe to thereby form the first foreign substance exclusion body 61. It is attached to the end.

  The structure 63 can be made of a material that does not deteriorate due to the fluid (condensate) discharged from the fluid discharge hole 40. Further, it is preferable to be light enough to change the position or posture of the structure 63 when the fluid discharged from the fluid discharge hole 40 comes into contact therewith. Therefore, the structure 63 can be comprised from a rubber tube, for example.

  In the first embodiment, the structural body 63 is formed of a rubber tube. However, the structural body 63 may be integrated with the first foreign matter exclusion body 61. For example, when the first foreign object remover 61 is a wire, the structure 63 may be formed by tangling the wire at the lower end of the first foreign object remover 61 to form a ball.

  In addition, since the structure 63 is provided at the end of the first foreign matter exclusion body 61, the axial center of the first foreign matter exclusion body 61 is in a state where no fluid is discharged from the fluid discharge hole 40. The fluid discharge hole 40 may be inclined with respect to the central axis. This state is shown in FIG. The tilted first foreign matter exclusion body 61 can effectively remove foreign matter attached to both end portions in contact with both end portions of the fluid discharge hole 40 intensively. Even if the first foreign matter exclusion body 61 is inclined with respect to the central axis of the fluid discharge hole 40 in a state where the fluid is not discharged, the fluid is the first foreign matter exclusion body 61 and the second foreign matter exclusion body 62. Alternatively, by contacting the structure 63, the position and posture can be changed.

  In other words, the first foreign object remover 61, the second foreign object remover 62, and the structure 63 are integrated. Therefore, if the position or posture of any one of the first foreign matter remover 61, the second foreign matter remover 62, or the structure 63 is changed by the fluid, the first foreign matter remover 61 and the second foreign matter remover 62 are used. Change the position and posture to eliminate foreign objects.

  In particular, the structure 63 provided at the lower end of the cleaning member 6 makes it easy to change the positions or postures of the first foreign matter exclusion body 61 and the second foreign matter exclusion body 62. Can be increased. In short, the structure 63 serves as a pendulum.

  As an example, the diameter of the fluid discharge hole 40 can be about 1 mm, preferably 0.7 to 0.9 mm, and the length of the fluid discharge hole 40 is 2 mm (that is, the thickness of the orifice plate 4 is 2 mm). Moreover, the pressure of the fluid shown in FIG. 1 can be about 0.3-0.9 MPa.

  Moreover, the 1st foreign material exclusion body 61 and the 2nd foreign material exclusion body 62 can be formed from one wire. A single wire is linearly made into a length corresponding to the length of the fluid discharge hole 40 and a length corresponding to the extra length provided at both ends thereof to form a first foreign substance exclusion body 61, and a structure 63 is provided at one end thereof. The other end can be formed into a second foreign substance exclusion body 62 that is in contact with the fluid inflow surface 41 by bending the tip of the other end into an L shape and bending the tip thereof at a right angle. As an example, when the length of the fluid discharge hole 40 is 2 mm, the length of the straight portion including the portion loosely inserted into the fluid discharge hole 40 in the first foreign matter exclusion body 61 is 5 cm. it can. However, the present invention is not limited to this.

  Further, as shown in FIGS. 1 and 2, the straight portion and the second foreign matter exclusion body 62 are parallel to each other, and the separation distance between them is larger than the diameter of the fluid discharge hole 40. Thereby, the cleaning member 6 does not fall downward from the fluid discharge hole 40.

  As described above, according to the steam trap 1 of the first embodiment, the first foreign object remover 61 loosely inserted in the fluid discharge hole 40 that removes the foreign substance attached to the fluid discharge hole 40 of the orifice plate 4 and And a cleaning member 6 having a second foreign matter removing body 62 for removing foreign matter adhering to the fluid inflow surface 41. Thus, not only the foreign matter adhering to the fluid discharge hole 40 is removed by the first foreign matter exclusion body 61 loosely inserted into the fluid discharge hole 40, but also the fluid inflow surface of the orifice plate 4 by the second foreign matter removal body 62. Foreign matter adhering to and depositing on 41 can also be removed. Therefore, it is possible to provide the steam trap 1 in which the orifice plate 4 is hardly clogged and maintenance is unnecessary for a long time.

  As an example, when the clogging of the fluid discharge hole of the orifice plate was compared between the above-described steam trap of the comparative configuration and the steam trap 1 of the first embodiment under the same conditions, the steam trap of the comparative configuration has a value of 1 to 2.5. In the months, clogging with foreign substances occurred and maintenance (disassembly / cleaning) was required, whereas the steam trap 1 of the first embodiment required no maintenance for more than 6 months.

  Even if the structure 63 is not provided at the lower end of the first foreign object remover 61, the position and posture of the fluid change when the fluid contacts the first foreign object remover 61 and the second foreign object remover 62, Foreign substances adhering to and depositing on the fluid discharge hole 40 and the fluid inflow surface 41 can be removed. However, by providing the structure 63, the center of gravity of the cleaning member 6 is shifted downward, and the position and posture of the cleaning member 6 are likely to change due to contact with the fluid.

  In the first embodiment, the lower casing 3 does not protrude greatly below the fluid outflow surface 42, and the structure 63 is exposed to the outside of the steam trap 1. Therefore, the airflow (wind etc.) outside the steam trap 1 is also a factor that changes the position and posture of the structure 63. That is, the position and posture of the structure 63 are relatively easy to change, and the fluid discharge hole 40 and the fluid inflow surface 41 can be more efficiently cleaned.

[Embodiment 2]
The following will describe another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  The difference between the second embodiment and the first embodiment lies in the difference in the shape of the structure provided at the lower end of the first foreign object exclusion body 61. The structure 63 ′ according to the second embodiment is a cone having a vertex directed toward the top, and a spiral structure 64 is formed on the side surface from the vertex toward the ground.

  When the fluid discharged from the fluid discharge hole 40 comes into contact with the top side of the structure 63 ′, the fluid flows through the spiral structure 64 formed on the side surface. Along with this, the structure 63 'swings, and in conjunction with this, the position or posture of the first foreign object remover 61 changes, and the position or posture of the second foreign object remover 62 also changes. Since the structure 63 ′ of the second embodiment is easily shaken from its shape, the positions or postures of the first foreign matter exclusion body 61 and the second foreign matter exclusion body 62 are easily changed. Foreign matter adhering to the peripheral area of the fluid discharge hole on the inflow surface can be efficiently removed.

[Embodiment 3]
The following will describe another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

  The difference between the third embodiment and the first embodiment lies in the difference in the shape of the structure provided at the lower end of the first foreign object exclusion body 61. The structure 63 ″ of the third embodiment is a propeller type configured with a plurality of wings 65.

  The fluid discharged from the fluid discharge hole 40 hits at least one of the plurality of wing portions 65, and thereby the structure 63 ″ swings. Then, the position or posture of the first foreign object remover 61 is changed in conjunction with the shaking of the structure 63 ″, and the position or posture of the second foreign object remover 62 is also changed. Since the structure 63 ″ of the third embodiment is easily swayed from its shape, the positions or postures of the first foreign matter exclusion body 61 and the second foreign matter exclusion body 62 are easily changed. Foreign matter adhering to the area around the fluid discharge hole on the fluid inflow surface can be efficiently removed.

[Embodiment 4]
The following will describe another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

  The difference between the third embodiment and the first embodiment lies in the shape of the second foreign matter exclusion body 62. The second foreign object exclusion body 62 ′ of the fourth embodiment is composed of a portion branched from the straight portion of the first foreign material exclusion body 61 including the part loosely inserted into the fluid discharge hole 40. The second foreign substance exclusion body 62 ′ is branched from the straight portion in the vertical direction, and the state where the cleaning member 6 is caught on the fluid inflow surface 41 is realized by the branch portion contacting the fluid inflow surface 41. ing. The second foreign matter exclusion body 62 ′ is in contact with the fluid inflow surface 41 in a state where the straight portion of the first foreign matter exclusion body 61 is loosely inserted into the fluid discharge hole 40 in the vertical direction. Therefore, the position and posture of the second foreign matter exclusion body 62 ′ with respect to the fluid inflow surface 41 are changed by the change in the position and posture of the first foreign matter exclusion body 61 due to the fluid, and are attached to the fluid inflow surface 41. The foreign matter can be removed by the second foreign matter exclusion body 62 '.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

  The present invention can be used for an orifice type steam trap.

DESCRIPTION OF SYMBOLS 1 Steam trap 2 Upper casing 3 Lower casing 3a Step part 4 Orifice plate 5 Gasket 6 Cleaning member 40 Fluid discharge hole (orifice)
41 fluid inflow surface 42 fluid outflow surface 61 1st foreign material exclusion body 62, 62 '2nd foreign material exclusion body 62a contact part 63, 63', 63 '' structure 64 spiral structure 65 wing | blade part

Claims (6)

An orifice plate provided with an orifice, with the fluid inflow side on the top side and the fluid outflow side on the ground side, and
A cleaning member having a first foreign matter removing body loosely inserted in the orifice for removing foreign matter attached to the orifice and a second foreign matter removing body for removing foreign matter attached to the fluid inflow side surface. equipped and,
The cleaning member is hooked on the surface on the fluid inflow side,
The steam trap, wherein the second foreign substance exclusion body is movably in contact with the surface on the fluid inflow side . At the end of the first foreign material exclusion body exposed on the fluid outflow side of the orifice plate, there is provided a structure that changes its position or posture by contacting the fluid that has flowed out of the orifice. The steam trap according to claim 1 . 3. The steam trap according to claim 1, wherein the first foreign matter exclusion body is a linear object having a thickness that occupies 50 to 80% of a sectional area of the orifice. An orifice plate provided with an orifice, with the fluid inflow side on the top side and the fluid outflow side on the ground side, and
A cleaning member having a first foreign matter removing body loosely inserted in the orifice for removing foreign matter attached to the orifice and a second foreign matter removing body for removing foreign matter attached to the fluid inflow side surface. Has
At the end of the first foreign material exclusion body exposed on the fluid outflow side surface of the orifice plate, a structure that changes its position or posture by contacting the fluid that has flowed out of the orifice is provided.
The steam trap according to claim 1, wherein the structure is a cone having a vertex directed toward the top, and a spiral structure is formed on a side surface from the vertex toward the ground . The steam trap according to claim 2 , wherein the structure has a plurality of wings. The orifice is formed in a vertical direction, and in a state where a fluid is discharged from the orifice, the first foreign object exclusion body is inclined with respect to the vertical direction. The steam trap according to any one of 1 to 5 .

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