JP2018080731A - Nozzle type steam trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive and small nozzle type steam trap having a nozzle enabling easy hole diameter processing and hole diameter adjustment of the nozzle and automatic removal of nozzle clogging caused by rust and dust in a drain and including a steam leakage prevention function.SOLUTION: The invention provides a nozzle type steam trap characterized by including a hole diameter adjustment mechanism being a linear structure which is inserted into a hole of a nozzle.SELECTED DRAWING: Figure 5

Description

  In various factories and facilities that use steam as a heat source via a heat exchanger, the present invention provides drainage (condensate with condensed steam) generated in steam-using equipment and a steam transport piping system between these equipments. The present invention relates to a nozzle-type steam trap capable of automatically and continuously discharging outside the system, and a nozzle-type steam trap having a hole diameter adjusting mechanism having a nozzle hole diameter adjusting function and a cleaning function and / or a fluid leakage preventing mechanism.

  In various factories and facilities that use steam as a heat source via a heat exchanger, it is necessary to automatically discharge the drain generated in the steam-using equipment and the steam transport piping system between these equipments.

  This is to ensure proper temperature conditions in the steam transport piping that connects the steam using equipment such as the heat exchanger section of the dryer and heating kiln, and to ensure stable and safe operation of the factory. is there. For example, if drain stays in steam-using facilities or steam transport piping systems, the heating efficiency is reduced, and the productivity of the equipment is remarkably reduced, and heating unevenness due to drain droplets can cause poor product quality. This will interfere with the stable operation of the factory. In addition, the drain accumulated in the steam piping system creates a large lump while being swept away by steam, collides with the bent part of the piping and the valve, or condenses all at once when it comes into contact with the steam and the steam volume becomes zero. This can cause a steam hammer in which a drain is pushed and collides with a place where a vacuum is created locally. If this steam hammer occurs, the pressure and pressure in the pipe will suddenly change, leading to damage to the gaskets and flanges of the connection part, as well as the valve itself. There is sex.

  Therefore, a large amount of steam straps are installed in the above factories and facilities. Conventionally, mechanical mechanical mechanical steam traps (bucket type / float type), thermostatic steam traps (bimetal type / bellows type), and Thermodynamic steam traps (disc type) have been used.

However, these mechanical steam traps have the following problems. The mechanical steam trap is a drain valve mechanism having a movable part. When a certain amount of drain is stored, the drain is opened by opening the drain valve, and then the drain valve is closed immediately thereafter. Therefore, due to this mechanism, it is not possible to avoid a large amount of steam leakage due to operation delay or repetitive operation, and intermittent drainage of the mechanical steam trap tends to cause damage to moving parts, and stable operation of steam-using equipment. Is not guaranteed. Nonetheless, the problem of energy loss due to a large amount of steam leakage from a mechanical steam trap has tended to be overlooked because of the strong awareness of the need for drainage drainage. It has been reviewed from the viewpoint of global environmental conservation such as energy saving and CO ₂ reduction.

  Under such circumstances, there is an increasing interest in various nozzle type steam traps such as orifice nozzle type, venturi nozzle type, and tunnel structure resistance pipe type steam traps. These are called fluidic steam traps, which use a drainage mechanism in which water has a lower kinematic viscosity when passing through fine passages than steam and water flows about 30 times that of steam. The structure has no moving parts. Therefore, unlike the conventional steam trap having a movable part, continuous drainage with less steam leakage is realized, and the fuel consumption of the boiler is greatly reduced. In addition, the structure without moving parts is excellent in durability and can be easily maintained and inspected. Furthermore, it is resistant to steam hammers and freezing, and has excellent stability and safety.

  As specific examples, for example, Patent Document 1 discloses an orifice nozzle type steam trap, and Patent Document 2 discloses a Venturi nozzle type steam trap. Although such a nozzle-type steam trap has the advantages described above, it has the following problems. The venturi nozzle type steam trap shown in FIG. 1 explains that the drainage amount depends on the hole diameter of the nozzle 3, so that the drainage amount is adjusted according to the fluctuation of the operating pressure difference between the inlet and the outlet, etc. There is a problem that it is necessary to replace the nozzle 3 in accordance with fluctuations in the amount of steam used depending on the operating conditions of the steam-using equipment. Further, a screen 6 for capturing rust and dust in the drain before the drain passes through the nozzle 3 is provided in the strainer 5. However, since the nozzle 3 has a small hole diameter, the screen 6 has rust and dust. There is a limit to catching, and there is a problem that the nozzle 3 is likely to be clogged. Furthermore, there is a problem that steam leakage cannot be sufficiently prevented only by the drainage mechanism in which the water of the fluid engineering steam trap flows about 30 times as much as the steam.

  In order to prevent the clogging of the orifice nozzle due to rust, dust, etc. in the drain, adjustment of the drainage amount of the orifice nozzle can be made in Patent Document 1 to advance and retreat with respect to these problems. The diameter of the orifice nozzle is adjusted by a simple member, and clogged rust and dust are removed. However, in this solution, there is a limit to the adjustment of the drainage amount, and there is a problem that manpower is required. In addition, the problem of reducing the amount of steam leakage is not recognized.

  Patent Document 2 relates to a typical venturi nozzle type steam trap shown in FIG. 1. The venturi nozzle 3 essentially has a problem of drain drainage adjustment, a problem of clogging such as rust and dust, and steam. The problem of leakage is not recognized.

  Patent Documents 3 and 4 disclose means for solving these nozzle-type steam trap problems.

  As shown in FIG. 2, Patent Document 3 discloses a drain discharge port 3-2 through which drain is discharged to a drain reservoir 9 provided in the steam trap, and drain from the drain reservoir 9 to the outside of the steam trap system. The drainage amount can be adjusted by rotating the difference in height from the drainage system outside discharge port 11. The mechanism is simple and the steam trap can be miniaturized. In addition to the drainage mechanism in which the water in the fluidic steam trap flows about 30 times as much as the steam, the leakage of the steam can be prevented by blocking the nozzle 3 by the drain. There is a feature. However, although the nozzle 3 is blocked by the drain, there is a case where the amount of drain storage is small and the steam leakage preventing function is insufficient. In addition, adjusting the drainage amount to some extent due to fluctuations in the operating pressure difference between the inlet and outlet, etc. has the great advantage that it can be dealt with by the rotation of the body 1 of the steam trap. In order to cope with a large change in drainage due to fluctuations in the amount of steam used depending on the situation, etc., it is necessary to replace the nozzle 3 having a different diameter of the hole formed in the nozzle 3. In addition, since the hole diameter of such a nozzle is small, it cannot be handled by drilling, and electric discharge machining may be necessary, which requires labor and is expensive, and the flatness of the shape in the hole is deteriorated. And this nozzle type steam trap is characterized in that the eyes of the screen 6 provided in the strainer 5 are made finer. However, since the hole diameter of the nozzle 3 is small, rust and dust etc. are removed by the screen 6. Capturing is limited and it is difficult to completely prevent nozzle clogging.

  Therefore, in Patent Document 4, in order to solve the above-mentioned problem of clogging of the nozzle, a nozzle whose tip is processed into a bullet shape and a nozzle in which a groove is formed from the nozzle hole toward the outer periphery of the nozzle. Etc. are proposed, but processing is difficult and there is a problem of productivity. Further, like the conventional nozzle, in order to cope with a large change in drainage, it is necessary to replace the nozzle having a different diameter of the hole formed in the nozzle, and the function of preventing the leakage of steam may be insufficient.

  On the other hand, Patent Documents 5 and 6 are steam traps that convert drains into steam and discharge the steam traps, and what is the above-described fluid engineering nozzle steam trap that uses the difference between the flow rate of steam and water passing through a fine passage? Although it is a fundamentally different system, it is intended to improve a steam trap using a nozzle. In addition, in this specification, all the steam traps using a nozzle including such a steam trap are called nozzle-type steam traps.

  Patent Document 5 attempts to solve the problem caused by the small and short fluid discharge port of the nozzle of the fluid engineering nozzle type steam trap. That is, a drain is stored in a large drain storage pipe, and a steam generation nozzle having a long hole for converting the drain into steam is provided in the drain storage pipe, and a plurality of steam discharge holes and long holes are provided on the outlet side. A steam discharge amount adjusting cap having a plug for closing the outlet is screwed, and the steam discharge amount adjusting cap is rotated to control the steam discharge amount. Although steam leakage is prevented by drain, as with conventional mechanical steam straps, a space for installing a large container called a drain storage pipe is required, and it is necessary to cope with changes in drain drainage, and steam discharge with manpower There is a problem that the amount adjustment cap must be frequently rotated. Moreover, the hole diameter of the steam generating nozzle is large but long, and the problem of clogging due to rust, dust, etc. remains dependent on the screen in the conventional strainer. Furthermore, in order to adjust the nozzle hole diameter corresponding to a large change in drainage, the nozzle for forming the long hole must be replaced.

  Patent Document 6 is connected to the drain storage pipe of Patent Document 5, a steam trap that converts drain into steam and discharges it, and further, a cyclone that can separate dust and the like is connected to the drain outlet of the steam trap, The drain discharge capacity is controlled by providing a sensor for opening and closing the cyclone discharge valve according to the increase or decrease of the drain in the drain storage pipe. In this case as well, steam leakage is prevented by draining, but a larger space than Patent Document 5 is required, and the mechanism is complicated, and a large number of required steam traps also have economic problems. Further, the adjustment of the nozzle hole diameter and the clogging of the nozzle have the same problems as in Patent Document 5.

  As described above, regardless of whether the steam trap using the nozzle is a fluid engineering nozzle type steam trap, the nozzle hole diameter can be easily processed and adjusted, and the nozzle can be prevented from clogging and vapor leakage. An inexpensive and small nozzle-type steam trap has not yet been found.

JP 2008-309290 A US Pat. No. 5,429,150 Japanese Patent No. 5694619 Japanese Patent No. 5833266 Japanese Patent No. 5561632 Japanese Patent No. 5745149

  As mentioned above, various conventional nozzle type steam traps require drilling and electric discharge machining to adjust the nozzle hole diameter in order to control the amount of drainage, and labor is required to form fine nozzles. In addition to being expensive, there is a problem that the flatness of the shape in the hole is deteriorated in electric discharge machining. In addition, since the nozzle hole diameter is small, there is a problem of nozzle clogging due to rust, dust, etc. that are not captured by the screen. Furthermore, in the case of a nozzle type steam trap having a mechanism in which the nozzle is not blocked by the drain, it is also necessary for the nozzle type steam trap having a mechanism in which the nozzle is blocked by the drain to leak steam if the drain water storage amount is small. The prevention function may be insufficient.

  The present invention has a nozzle that can easily remove the nozzle clogging due to rust, dust, etc. in the drain, is easy to process the hole diameter of the nozzle and adjusts the hole diameter, and has a steam leakage prevention function and is inexpensive. It aims to provide a small nozzle type steam trap. In particular, the present invention provides a steam trap that solves the problems of hole diameter processing and hole diameter adjustment, clogging, and steam leakage related to a venturi nozzle type steam trap.

  The present inventors have found that the above problem can be solved by inserting a nozzle hole diameter adjusting mechanism through the nozzle hole of the nozzle-type steam trap, and the present invention has been completed.

  That is, the present invention is a nozzle-type steam trap characterized in that a steam trap provided with a nozzle is provided with a nozzle hole diameter adjusting mechanism inserted into the hole of the nozzle. The nozzle hole diameter adjusting mechanism is not particularly limited as long as it can be inserted into the nozzle, but in consideration of the nozzle form and the manufacture of the nozzle hole diameter adjusting mechanism, it may be a linear structure. preferable. Accordingly, the linear structure includes not only a cylindrical structure but also a structure having a spiral structure having a diameter passing through the nozzle hole, a zigzag structure, a topological structure, or the like.

  Conventionally, the nozzle hole diameter of the nozzle-type steam trap (Figs. 1 and 2) is due to fluctuations in the working pressure difference between the inlet and outlet, external factors depending on the season, fluctuations in the amount of steam used due to the operating conditions of the steaming equipment, etc. In order to cope with the change in the drainage amount, one having a diameter of about 0.1 to 4.4 mm has been used. Generally, each of these holes is formed by drilling or electric discharge machining, and a nozzle having a hole diameter suitable for the situation is replaced and used. In particular, in the case of a fine hole diameter of about 0.4 mm or less, drilling is difficult and formed by electric discharge machining, which requires labor, is expensive, and the inner surface of the hole becomes irregular, There was a problem that the flow of the water became irregular and was not preferable in terms of drainage and steam leakage.

  Therefore, if the nozzle is provided with a mechanism that can adjust the hole diameter of the nozzle to a desired hole diameter, nozzles corresponding to various hole diameters can be provided if the nozzles with a certain hole diameter are manufactured. In particular, when a nozzle with a hole diameter that requires electric discharge machining is required, if a nozzle with a hole diameter that can be formed by drilling is manufactured and equipped with a nozzle hole diameter adjustment mechanism, the hole diameter that requires electric discharge machining, for example, the diameter The nozzle has a hole diameter corresponding to about 0.4 mm or less. Therefore, it is possible to solve the problems relating to the nozzle hole processing described above.

  The linear structure of the nozzle hole diameter adjusting mechanism is designed in various forms such as a cylindrical structure, a spiral structure, a zigzag structure, and a topological structure so that it can be inserted into the nozzle hole according to the hole diameter of the nozzle. However, it is reasonable to use a linear structure with a cylindrical structure in consideration of the form of the nozzle and the manufacture of the nozzle hole diameter adjusting mechanism. Further, since the nozzle hole diameter adjusting mechanism is manufactured according to the nozzle having a diameter of about 0.1 to 4.4 mm, the form, the diameter, and the like need to be designed appropriately.

  On the other hand, the nozzle hole diameter adjusting mechanism can be fixed, but if it is installed so that it can be swung, the nozzle hole diameter adjusting mechanism that swings along with the drainage will swing, and rust and dust that cannot be captured by the screen. A clogging prevention function that can prevent the nozzles from covering the nozzle holes can also be exhibited.

  As described above, the nozzle hole diameter adjusting mechanism provided in the nozzle-type steam trap of the present invention is not particularly limited as long as it is a linear structure inserted through the nozzle hole. In order to be applied to the nozzle-type steam trap, the nozzle hole diameter adjusting function and the clogging preventing function cannot be exhibited unless the nozzle hole diameter adjusting mechanism holds the linear structure in the nozzle hole. Therefore, the nozzle hole diameter adjusting mechanism provided in the nozzle-type steam trap of the present invention is characterized in that it has the following configuration.

  When the nozzle hole diameter adjustment mechanism is composed only of a linear structure, it is possible to hold the linear structure in the nozzle hole if it has a length corresponding to the size and shape of the steam trap. It is. In this case, since the nozzle hole diameter adjusting mechanism can be fixed and can be swung, the nozzle hole diameter adjusting function and the clogging preventing function can be exhibited.

  However, in order for the nozzle hole diameter adjusting mechanism to be securely held in the nozzle hole, the linear structure constituting the nozzle hole diameter adjusting mechanism is used as the locking structure for holding the linear structure body in the nozzle hole. It is preferable to attach to at least one end of the body, and when attached to both ends, the linear structure of the nozzle hole diameter adjusting mechanism can be more reliably held in the nozzle hole. However, when this locking structure is attached only to one end of the linear structure constituting the nozzle hole diameter adjusting mechanism, the linear structure constituting the nozzle hole diameter adjusting mechanism is determined depending on the configuration of the nozzle-type steam trap. The position is selected so that it is held in the nozzle hole. Further, depending on the structure of the locking structure, a nozzle hole diameter adjusting mechanism having various functions can be provided.

  The locking structure attached to the nozzle hole diameter adjusting mechanism of the present invention is not limited in terms of material and shape as long as it can hold the linear structure constituting the nozzle hole diameter adjusting mechanism in the nozzle hole. Absent. However, it is preferable that the material is not corroded by the drain, is not easily broken by swinging, and can be processed into various shapes, and stainless steel, plastic, ceramic, or the like is used. On the other hand, the shape is characterized by various locking structures as shown below.

  First, the locking structure according to the present invention is an L-shaped, T-shaped, circular, polygonal, star-shaped, spiral-shaped or the like folded structure obtained by processing a linear object thinner than the nozzle hole. It is a feature. The bent structure is not particularly limited as long as the linear structure constituting the nozzle hole diameter adjusting mechanism is processed so as not to pass through the nozzle hole. It is sufficient that it is attached to at least one end of the linear structure constituting the nozzle hole diameter adjusting mechanism, but attaching to both ends ensures that the linear structure constituting the nozzle hole diameter adjusting mechanism is attached to the nozzle hole. It is preferable from the viewpoint of holding. Further, it can be fixed or swingable by adjusting the length of the linear structure constituting the nozzle hole diameter adjusting mechanism.

  Secondly, the locking structure of the present invention has a spherical body, a columnar body, and a cone that prevent the linear structure constituting the nozzle hole diameter adjusting mechanism from passing through the nozzle hole without closing the nozzle hole. It is characterized by being a massive structure larger than the hole of a nozzle such as a solid body or a polyhedron. It is sufficient for this block structure to be attached to at least one end of the linear structure constituting the nozzle hole diameter adjusting mechanism, as in the case of the bent structure, but the linear structure constituting the nozzle hole diameter adjusting mechanism more reliably. May be attached to both ends, a block structure may be attached to one end, and a bent structure may be attached to the other end. Further, it can be fixed or swingable by adjusting the length of the linear structure constituting the nozzle hole diameter adjusting mechanism. However, in the case of a massive structure, it is necessary to attach it to the end of the linear structure constituting the nozzle hole diameter adjusting mechanism as a locking structure at a position where the nozzle hole is not blocked.

  Thirdly, the locking structure of the present invention is an elastic structure. In the case of this elastic structure, it is preferably a coiled compression spring or tension spring made of stainless steel or plastic so that drainage can be discharged. This elastic structure uses the inner wall of the steam trap body or a stopper disposed there, and the linear structure that forms the nozzle hole diameter adjustment mechanism by the action of the expansion force of the compressed spring or the contraction force of the extended spring At least one end of the linear structure constituting the nozzle hole diameter adjusting mechanism is attached so that the body is held in the nozzle hole. Depending on the strength of the restoring force of the spring, the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed and can be swung. In order to hold the linear structure constituting the nozzle hole diameter adjusting mechanism more reliably in the nozzle hole, an elastic structure may be provided at both ends, but the elastic structure is bent at one end and bent at the other end. A structure or a massive structure may be provided.

  Fourth, the locking structure of the present invention is a massive weight structure. This block weight structure is attached to one end on the drain outlet side of the linear structure constituting the nozzle hole diameter adjusting mechanism so as to close the nozzle hole, and in addition to the nozzle hole diameter adjusting function and the clogging preventing function. In addition, it is possible to provide a nozzle hole diameter adjusting mechanism provided with a steam leakage preventing function. In the nozzle-type steam trap shown in FIG. 1, this massive weight structure blocks the nozzle, thereby preventing vapor leakage. In the nozzle-type steam trap shown in FIG. 2, since the nozzle is sealed by the drain and the massive weight structure, the steam leakage preventing ability can be further improved. Accordingly, the massive weight structure may be made of the same material and shape as the massive structure, but the drainage amount is adjusted according to the operating environment and operating conditions of the steam-using equipment, and the variation of the steam usage amount, etc. It is necessary to set the weight. This massive weight structure may be attached to at least one end of the linear structure constituting the nozzle hole diameter adjusting mechanism, but the linear structure constituting the nozzle hole diameter adjusting mechanism can be more reliably used as the nozzle hole. In order to hold, it is preferable to use a cylindrical rockable mass structure that fits the flange of the nozzle. Further, the bent structure, the massive structure, and the elastic structure may be attached to the other end of the linear structure constituting the nozzle hole diameter adjusting mechanism, but the linear structure constituting the nozzle hole diameter adjusting mechanism may be provided. The length of the structure is adjusted, and each of these structures needs to be attached so that the linear structure constituting the nozzle hole diameter adjusting mechanism can swing.

  Fifth, the locking structure of the present invention has the block weight structure attached to one end on the drain outlet side of the linear structure constituting the nozzle hole diameter adjusting mechanism, and further to the block weight structure. It is a structure formed by adding the elastic structure. The massive weight structure and the elastic structure can use any of the structures described above in terms of shape, material, function, etc., and the bent structure, on the other end of the linear structure constituting the nozzle hole diameter adjusting mechanism, The massive structure and the elastic structure may be attached so as to be able to swing. Such a locking structure formed by sequentially connecting the massive weight structure and the elastic structure can further enhance the function of preventing the vapor leakage of the massive weight structure. However, in this case, a torsion spring can be used as the elastic structure. In this case, the torsion spring is moved to an appropriate position on the inner wall of the steam trap body, that is, the block weight structure is moved up and down by the torsion spring, and the linear structure constituting the nozzle hole diameter adjusting mechanism is moved to the nozzle. It is characterized in that the hole is provided at a position to swing.

  According to the present invention, since the nozzle hole diameter can be adjusted without requiring fine processing of the nozzle hole diameter, it is easy to process the nozzle, and an inexpensive nozzle-type steam trap can be manufactured. Furthermore, the linear structure constituting the nozzle hole diameter adjusting mechanism swings, so that nozzle clogging due to rust, dust, etc. in the drain can be automatically removed, and a steam leakage prevention function is provided. A small nozzle-type steam trap can be provided. In particular, the present invention provides a steam trap that solves the problems of hole diameter processing and hole diameter adjustment, clogging, and steam leakage related to a venturi nozzle type steam trap.

It is a cross-sectional schematic diagram of the conventional typical venturi nozzle type steam trap. It is a cross-sectional schematic diagram of a venturi nozzle type steam trap provided with the drainage amount adjusting mechanism. The venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention is characterized in that the nozzle hole diameter adjusting mechanism inserted through the hole of the venturi nozzle is a linear structure. FIG. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is an L-shaped bending structure of a linear object as a locking structure. FIG. 3 is a schematic cross-sectional view of a venturi nozzle type steam trap that is provided with one end of a linear structure on the drain outlet side and is swingable. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is an L-shaped bending structure of a linear object as a locking structure. FIG. 2 is a schematic cross-sectional view of a venturi nozzle type steam trap that is attached to both ends of a linear structure and is swingable. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle has a rectangular column-shaped block structure blocking the nozzle as a locking structure. FIG. 2 is a schematic cross-sectional view of a venturi nozzle type steam trap, which is attached to both ends of the linear structure without being swingable. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is an L-shaped bending structure of a linear object as a locking structure. It is the cross-sectional schematic diagram of the venturi nozzle type steam trap characterized by being attached to the both ends of a linear structure, and being fixed to the nozzle. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is an L-shaped bending structure of a linear object as a locking structure. It is the cross-sectional schematic diagram of the venturi nozzle type steam trap characterized by being attached to both ends of the linear structure and being fixed to the inner wall of the steam trap itself. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle has a linear structure on the drain outlet side as an elastic structure as a locking structure. FIG. 2 is a schematic cross-sectional view of a venturi nozzle type steam trap, which is attached to one end of the body and is held and swingable by an elastic structure and an inner wall of the steam trap itself. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle has a linear structure on the drain outlet side as an elastic structure as a locking structure. The L-shaped bent structure is attached to the other end of the linear structure on the drain inlet side at one end of the body, and is fixed by the inner wall of the elastic structure, the bent structure, and the steam trap itself. It is a cross-sectional schematic diagram of the characteristic venturi nozzle type steam trap. In the venturi nozzle type steam trap shown in FIG. 2 according to one embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle has an elastic structure as a locking structure at both ends of the linear structure. FIG. 3 is a schematic cross-sectional view of a venturi nozzle type steam trap, which is attached, held by an elastic structure and an inner wall of the steam trap itself, and swingable. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle has a spherical mass structure as a locking structure on the drain outlet side. FIG. 2 is a schematic cross-sectional view of a venturi nozzle type steam trap that is attached to one end of a linear structure and is swingable. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle has a cylindrical massive weight structure as a locking structure, on the drain outlet side. FIG. 2 is a schematic cross-sectional view of a venturi nozzle type steam trap attached to one end of the linear structure and swingable. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle has a cylindrical massive weight structure as a locking structure, on the drain outlet side. An L-shaped bent structure is attached to one end of the linear structure at the other end of the linear structure on the drain inlet side, and is swingable. FIG. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted through the hole of the venturi nozzle fits the flange of the nozzle on the drain outlet side as a locking structure. It is a cross-sectional schematic diagram of a venturi nozzle type steam trap characterized in that a cylindrical massive weight structure is attached to one end of a linear structure and is swingable. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is provided at one end of the linear structure on the drain outlet side as a locking structure. It is a cross-sectional schematic diagram of a venturi nozzle type steam trap characterized in that a massive weight structure and an elastic structure are connected in that order and can swing. In the venturi nozzle type steam trap shown in FIG. 2 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is provided at one end of the linear structure on the drain outlet side as a locking structure. A mass weight structure and an elastic structure are connected in that order and can swing, and the torsion spring moves up and down the mass weight structure on the inner wall of the steam trap body to form a nozzle hole diameter adjustment mechanism FIG. 3 is a schematic cross-sectional view of a venturi nozzle type steam trap, in which a linear structure to be provided is provided at a position where the linear structure can swing in a nozzle hole. In the venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is a linear structure, and the line constituting the nozzle hole diameter adjusting mechanism It is a cross-sectional schematic diagram of a venturi nozzle type steam trap characterized in that a stopper that can hold the cylindrical structure in the hole of the nozzle is provided on the inner wall of the steam strap body. In the venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is an L-shaped bending structure of a linear object as a locking structure. FIG. 2 is a schematic cross-sectional view of a venturi nozzle type steam trap that is attached to both ends of a linear structure and is swingable. In the venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is a linear structure as a block structure having a rectangular column shape as a locking structure. It is the cross-sectional schematic diagram of the venturi-nozzle type steam trap characterized by being attached to both ends and fixed. In the venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle has a linear structure on the drain outlet side as an elastic structure as a locking structure. FIG. 3 is a schematic cross-sectional view of a venturi nozzle type steam trap attached to one end of the body, held by an elastic structure and a stopper provided on the inner wall of the steam trap body, and swingable. In the venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is provided at one end of the linear structure on the drain outlet side as a locking structure. It is a cross-sectional schematic diagram of a venturi nozzle type steam trap characterized in that a massive weight structure and an elastic structure are connected in that order and can swing. In the venturi nozzle type steam trap shown in FIG. 1 according to an embodiment of the present invention, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle is provided at one end of the linear structure on the drain outlet side as a locking structure. A mass weight structure and an elastic structure are connected in that order and can swing, and the torsion spring moves up and down the mass weight structure on the inner wall of the steam trap body to form a nozzle hole diameter adjustment mechanism FIG. 3 is a schematic cross-sectional view of a venturi nozzle type steam trap, in which a linear structure to be moved is provided at a position where the linear structure can be swung by a nozzle hole.

  Hereinafter, the present invention will be described with respect to a venturi nozzle type steam trap, using schematic views of cross sections in which parts and members unnecessary for the description of the present invention are omitted. The present invention will be specifically described with reference to one embodiment shown in the drawings. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. And is limited only by the technical ideas described in the claims.

  One embodiment of the present invention included in claim 1 or 2 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted through the hole of the venturi nozzle 3 is only the linear structure A, Depending on the size of the inside of the steam trap, the minimum length required for the linear structure A to be held in the hole of the nozzle 3 is required. As is apparent from the drawing, such a nozzle hole diameter adjusting mechanism has a function of adjusting the hole diameter and preventing nozzle clogging by swinging. The same applies hereinafter.

  One embodiment of the present invention included in claims 1 to 4 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted through the hole of the venturi nozzle 3 is an L-shaped bent structure B-1 of a linear object as a locking structure. This is a venturi nozzle type steam trap that is attached to one end of the linear structure and is swingable. With this L-shaped bent structure B-1, the linear structure A constituting the nozzle hole diameter adjusting mechanism can be held in the hole of the nozzle 3 regardless of the size of the inside of the steam trap. The length of the linear structure A constituting the mechanism can be shortened.

  One embodiment of the present invention included in claims 1 to 4 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is an L-shaped bending structure B-1 and B-2 of a linear object as a locking structure. Is a venturi nozzle type steam trap characterized by being attached to both ends of the linear structure A and being swingable. The L-shaped bent structures B-1 and B-2 are attached to both ends of the linear structure A constituting the nozzle hole diameter adjusting mechanism, whereby the linear structure A constituting the nozzle hole diameter adjusting mechanism is obtained. It is securely held in the hole of the nozzle 3.

  One embodiment of the present invention encompassed in claims 1 to 3 and 5 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 has a rectangular column-like mass structure C-1 and C-2 as the locking structure. It is a venturi nozzle type steam trap characterized in that it is attached to both ends of the linear structure A without being blocked and can swing. Like the bent structure, the linear structure A constituting the nozzle hole diameter adjusting mechanism is provided at both ends in order to be securely held in the hole of the nozzle 3, but only the upper end may be provided. One end may be a massive structure and the other end may be a bent structure.

  One embodiment of the present invention included in claims 1 to 4 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is an L-shaped bent structure B-3 and B-4 of a linear object as a locking structure. Is a venturi nozzle type steam trap characterized by being attached to both ends of the linear structure A and being fixed to the nozzle 3. This is an example in which the nozzle hole diameter adjusting mechanism is fixed to the nozzle 3 by adjusting the length of the linear structure A constituting the nozzle hole diameter adjusting mechanism. Here, an example is shown in which the locking structure is a folded structure B-3 and B-4 at both ends, but one end is a folded structure and the other end is a lump structure at both ends. It may be a massive structure.

  One embodiment of the present invention included in claims 1 to 4 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is an L-shaped bent structure B-5 and B-6 of a linear object as a locking structure. Is a Venturi nozzle type steam trap characterized by being attached to both ends of the linear structure A and being fixed to the inner wall of the body 1 of the steam trap. Here, an example in which the locking structures are the folded structures B-5 and B-6 is shown, but the folded structures are not necessarily required, and may be a massive structure or an elastic structure. When an elastic structure is used, the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed or oscillated according to the strength of the restoring force of the spring.

  One embodiment of the present invention encompassed in claims 1 to 3 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 has an elastic structure D-1 as a locking structure of the linear structure A on the drain outlet side. It is a venturi nozzle type steam trap that is attached to one end, is held by the elastic structure D-1 and the inner wall of the body 1 of the steam trap, and is swingable. In this case, the elastic structure utilizes the expansion force of the coiled compression spring, and the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed according to the strength of the restoring force of the spring.

  One embodiment of the present invention included in claims 1 to 4 and 6 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 has an elastic structure D-2 as a locking structure of the linear structure A on the drain outlet side. At one end, an L-shaped bent structure B-7 is attached to the other end of the linear structure A on the drain inlet side, and the elastic structure D-2, the bent structure B-7, and the body of the steam trap 1 is a venturi nozzle type steam trap which is held by an inner wall of 1 and can swing. In this case, the elastic structure uses the contraction force of the coiled contraction spring, and the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed according to the strength of the restoring force of the spring. Here, an example in which the locking structure is the folded structure B-7 is shown, but instead of the folded structure, a massive structure may be provided so as not to block the nozzle hole.

  One embodiment of the present invention included in claims 1 to 3 and 6 is shown in FIG. In the type of venturi nozzle type steam trap shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is provided with an elastic structure D-3 as an engaging structure at both ends of the linear structure A. The Venturi nozzle type steam trap is held by the elastic structure D-3 and the inner wall of the body 1 of the steam trap and is swingable. In this case, the elastic structure uses the contraction force of the coiled contraction spring, and the linear structure constituting the nozzle hole diameter adjusting mechanism can be fixed according to the strength of the restoring force of the spring.

  One embodiment of the present invention encompassed in claims 1 to 3 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 has a spherical block structure E-1 as a locking structure and a linear structure on the drain outlet side. It is a venturi nozzle type steam trap that is attached to one end of the body A and is swingable. Such a massive weight structure E-1 is not limited as long as it can close the hole of the nozzle 3, but it closes the nozzle 3 together with the drain accumulated in the water storage section 9 to prevent vapor leakage. It is necessary to adjust the weight to be effective. The nozzle hole diameter adjusting mechanism including the massive weight structure has a steam leakage preventing function in addition to a hole diameter adjusting function and a clogging preventing function. The same applies hereinafter.

  One embodiment of the present invention included in claims 1 to 3 and 7 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 has a cylindrical massive weight structure E-2 as a locking structure and a linear shape on the drain outlet side. A venturi nozzle type steam trap, which is attached to one end of the structure A and is swingable. Compared with FIG. 12, it is the example adjusted to the shape and weight which closed the nozzle 3 with the drain collected in the water storage part 9, and heightened the effect which prevents a vapor | steam leakage.

  One embodiment of the present invention included in claims 1 to 4 and 7 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 has a cylindrical block weight structure E-3 as a locking structure and a linear shape on the drain outlet side. A venturi nozzle type steam trap characterized in that an L-shaped bent structure B-8 is attached to the other end of the linear structure A on the drain inlet side at one end of the structure A and is swingable. is there. The bent structure B-8 is provided to securely hold the linear structure constituting the nozzle hole diameter adjusting mechanism in the hole of the nozzle 3, and can swing without blocking the nozzle 3. As such, a massive structure may be used. Also, a mass structure that does not block the nozzle hole or an elastic structure of a coiled tension spring may be added to hold the linear structure that constitutes the nozzle hole diameter adjusting mechanism, thereby enhancing the steam leakage prevention effect. However, the weight and the restoring force must be such that the linear structure can swing.

  One embodiment of the present invention included in claims 1 to 3 and 7 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, a cylindrical block structure in which the nozzle hole diameter adjusting mechanism inserted through the hole of the venturi nozzle 3 fits the nozzle flange on the drain outlet side as a locking structure. The Venturi nozzle type steam trap is characterized in that the body E-4 is attached to one end of the linear structure A and is swingable. In order to prevent the nozzle hole diameter adjusting mechanism from falling off, a bent structure or a massive structure that does not block the hole of the nozzle 3 may be attached to the other end of the linear structure A. In addition, a mass structure that does not block the hole of the nozzle 3 or an elastic structure of a coiled tension spring is provided to hold the linear structure that constitutes the nozzle hole diameter adjusting mechanism, thereby improving the steam leakage prevention effect. It should be good, but the weight and restoring force should be such that the linear structure can swing.

  One embodiment of the present invention included in claims 1 to 3 and 8 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is a mass structure E at one end of the linear structure A on the drain outlet side as a locking structure. -5 and elastic structure D-5 are connected in that order, are held by the elastic structure D-5 and the inner wall of the body 1 of the steam trap, and can swing, the venturi nozzle type steam trap It is. Steam leakage is prevented by the action of the expansion force of the coiled compression spring and the weight together with the drain accumulated in the water storage section 9, but this action needs to be adjusted according to the operating environment and conditions of the steam-using equipment.

  One embodiment of the present invention included in claims 1 to 3 and 8 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 2, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is a mass structure E at one end of the linear structure A on the drain outlet side as a locking structure. −6 and the elastic structure D-6 are connected in that order and can swing, and the torsion spring D-6 is the upper and lower surfaces of the mass trap structure D-6 on the inner wall of the body 1 of the steam trap. It is a venturi nozzle type steam trap characterized in that it is provided at a position where the linear structure A can move and swing in the hole of the nozzle 3.

  An embodiment of the present invention encompassed by claims 1 and 2 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is a linear structure A, and the linear structure A can be held in the nozzle hole. It is a venturi nozzle type steam trap provided with stoppers 13-1 and 13-2. Here, the stopper is provided at two locations, but it can be either one, and in this case, the linear structure constituting the nozzle hole diameter adjusting mechanism is bent at one end opposite to the stopper. Alternatively, a block structure that does not block the nozzle may be attached.

  One embodiment of the present invention included in claims 1 to 4 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is an L-shaped bent structure B-1 and B-4 of a linear object as a locking structure. Is a venturi nozzle type steam trap characterized by being attached to both ends of the linear structure A and being swingable. The nozzle hole diameter adjusting mechanism can be fixed to the nozzle 3 by adjusting the length of the linear structure A. Further, a lump structure may be added so as not to close the nozzle 3 instead of the bent structure.

  One embodiment of the present invention included in claims 1 to 3 and 5 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is a rectangular structure having a cylindrical structure C-3 and C-4 having a linear structure as a locking structure. It is the cross-sectional schematic diagram of the venturi nozzle type steam trap characterized by being attached to both ends of the body A and being fixed.

  One embodiment of the present invention included in claims 1 to 3 and 6 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 has an elastic structure D-1 as a locking structure of the linear structure A on the drain outlet side. A venturi nozzle type steam trap that is attached to one end, is held by an elastic structure D-1 and a stopper 13-3 provided on the inner wall of the body 1 of the steam trap, and is swingable. . The linear structure constituting the nozzle hole diameter adjusting mechanism can also be fixed to the hole of the nozzle 3 by increasing the expansion force of the coiled compression spring.

  One embodiment of the present invention included in claims 1 to 3 and 8 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is a mass structure E at one end of the linear structure A on the drain outlet side as a locking structure. -5 and elastic structure D-5 are connected in that order, and are held by the elastic structure D-5 and the stopper 13-4 provided on the inner wall of the body 1 of the steam trap, and can swing. It is a characteristic venturi nozzle type steam trap. Steam leakage is prevented by the expansion force of the coiled compression spring and the action of the weight, but this action needs to be adjusted according to the operating environment and conditions of the steam-using equipment.

  One embodiment of the present invention included in claims 1 to 3 and 8 is shown in FIG. In the venturi nozzle type steam trap of the type shown in FIG. 1, the nozzle hole diameter adjusting mechanism inserted into the hole of the venturi nozzle 3 is a mass structure E at one end of the linear structure A on the drain outlet side as a locking structure. -6 and the elastic structure D-6 are connected in that order, and can swing, and the torsion spring D-6 is connected to the inner wall of the body 1 of the steam trap and the massive weight structure E-6 is vertically moved. It is a venturi nozzle type steam trap characterized in that it is provided at a position where the linear structure A can move and swing in the nozzle hole. Although the steam leakage is prevented by the restoring force of the torsion spring D-6, this action needs to be adjusted according to the operating environment and conditions of the steam-using facility.

  The nozzle hole diameter adjusting mechanism in the above embodiment is made of stainless steel in consideration of the corrosiveness to the drain, the workability for manufacturing various shapes of the nozzle hole diameter adjusting mechanism, and the weight to play the role of a weight. However, it may be made of plastic or ceramic.

  The present invention is a nozzle-type steam trap provided with a nozzle hole diameter adjusting mechanism. A nozzle is a pipe-like mechanical part used to determine the flow direction of a fluid such as a gas or a liquid. Widely used to control fluid properties such as flow rate, flow velocity, direction, and pressure. In general, the structure is such that the circular cross-sectional area is reduced and fluid is ejected at high speed. Specifically, the water outlet of the fire hose, the outlet of the Pelton turbine, the steam jet of the steam turbine. Used for outlets, fuel injection ports of compression ignition engines, etc. Therefore, the nozzle hole diameter adjusting mechanism provided in the nozzle-type steam trap of the present invention can be widely used for devices in which such nozzles are used.

1 Body 2 Packing 3 Venturi nozzle
3-1 Venturi nozzle drain inlet 3-2 Venturi nozzle drain outlet 4 End cap
5 Strainer
6 Screen with support
7 Strainer end cap
8 Ball Valve 9 Drain Reservoir 10 Drain Inlet 11 Drain Outlet 12 Union 13 Stopper 13-1 First Stopper 13-2 Second Stopper 13-3 Third Stopper 13-4 Fourth Stopper A linear structure B-1 1st bending structure B-2 2nd bending structure B-3 3rd bending structure B-4 4th bending structure B-5 5th bending structure B-6 Sixth folded structure B-7 Seventh folded structure B-8 Eighth folded structure C-1 First massive structure C-2 Second massive structure C-3 Third C-4 4th lump structure D-1 1st elastic structure D-2 2nd elastic structure D-3 3rd elastic structure D-4 4th elastic structure D -5 Fifth elastic structure D-6 Sixth elastic structure E- 1st lump weight structure E-2 2nd lump weight structure E-3 3rd lump weight structure E-4 4th lump weight structure E-5 5th lump weight structure E-6 Sixth massive weight structure

Claims (3)

  A steam trap provided with a nozzle, comprising a nozzle hole diameter adjusting mechanism inserted into the hole of the nozzle.   The nozzle type steam trap according to claim 1, wherein the nozzle hole diameter adjusting mechanism is a linear structure.   The nozzle type according to claim 2, wherein a locking structure having a shape in which the linear structure cannot pass through the nozzle hole is attached to at least one end of the linear structure. steam trap.

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