JP6779507B1 - steam trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steam trap which can clear the clogging by a simple operation and can return a steam piping system such as a steam-using device or a steam transport pipe to the original good efficiency driving in a short time. thing. SOLUTION: A ball valve body 10 rotatably arranged around a valve shaft 3 in a valve chamber 2, a small-diameter hole passage 12 of a straight pipe formed perpendicular to the valve shaft 3, and the above. A straight pipe large-diameter hole 13 formed so as to be orthogonal to the valve shaft 3 and out of phase with the small-diameter hole 12 is formed, and the small diameter is adjusted according to the rotation position of the ball valve body 10. The first mode in which one open end of the hole 12 is located on the primary side to communicate with the inside of the straight tubular passage, and the second mode in which the other open end is located on the primary side to communicate with the inside of the straight tubular passage. It is an intermediate position between the 1st rotation position and the 2nd mode rotation position, and the 3rd mode in which the inside of the straight tubular passage is communicated by the large-diameter hole 13 can be switched. [Selection diagram] Fig. 1

Description

The present invention relates to a steam trap containing a ball valve having a hole for communicating the primary side and the secondary side.

Conventionally, steam traps that separate condensate (drain) from steam and discharge it to the outside of the system have been installed in steam piping systems such as steam-using equipment and steam transportation pipes. A plate material or a spherical member having a small-diameter orifice hole formed by using a plate material or the like is arranged inside to separate condensate (drain) from steam.

Steam traps with orifice holes are classified as "continuous" steam traps as opposed to "intermittent (mechanical)" steam traps that allow raw steam to flow out when the valve operates, and have moving parts. However, since there is no pressure fluctuation on the primary side, there is an advantage that the steam hammer caused by it does not occur, but on the other hand, clogging (biting) by foreign matter such as dust mixed in the fluid passing from the primary side. Has a problem that may occur. If the orifice hole that serves as the valve port is blocked, the steam trap will not function, and eventually the condensate will accumulate in the steam-using equipment and steam transport pipe, and the heating efficiency will decrease.

Then, in order to eliminate the clogging of the orifice hole, a steam trap having a structure in which a strainer is provided immediately before the orifice hole and the strainer is used to filter out dust and the like to prevent clogging has also been developed (see Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-027389

However, when a strainer is provided, maintenance work such as removing the steam trap from the piping system and cleaning the strainer is required in order to remove the foreign matter filtered by the strainer from the inside of the piping.

Foreign matter larger than the diameter of the orifice hole can be filtered out with a strainer, but in reality, small foreign matter that has passed through the strainer condenses on the primary side, causing clogging of the orifice hole, which is the original nature of the steam trap. In many cases, it reduces the efficiency of.

Here, the above-mentioned condensed foreign matter has no viscosity or stickiness. Therefore, if the pressures on the primary side and the secondary side are reversed, the foreign matter clogged in the orifice hole located on the primary side can be pushed back in the direction of arrival and removed. Focusing on this point, as shown in FIG. 4, two bypass pipes connecting the primary side and the secondary side are alternately connected to the main pipe used during normal operation in which the orifice hole is arranged. At the same time, by using a reverse cleaning pipe with an on-off valve in the main pipe and bypass pipe and controlling the opening and closing of each on-off valve, the pressure between the primary side and the secondary side is exchanged, and it is located on the primary side. The technology to remove foreign matter from the orifice hole that had been used is also adopted.

However, when this reverse cleaning pipe is installed, there are new problems of arrangement space and construction cost.

Therefore, according to the present invention, even when the communication hole for separating the condensate (drain) from the steam is clogged and the efficiency of the steam trap itself or the steam piping system is lowered, the clog is formed by a simple operation. It is an object of the present invention to provide a steam trap that can solve the problem and return the steam piping system such as steam-using equipment and steam transportation pipe to the original good efficiency driving in a short time.

In order to solve the above problems, the steam trap of the present invention is provided with a piping case having a valve chamber in the straight tubular passage and a primary in the straight tubular passage which is rotatably arranged around the valve shaft in the valve chamber. A steam trap including a ball valve body formed so that a side and a secondary side can communicate with each other, and the ball valve body has a straight line penetrating the ball valve body formed perpendicular to the valve axis. The small-diameter hole path of the pipe and the large-diameter hole path of the straight pipe penetrating the ball valve body formed perpendicular to the valve axis are formed so as not to intersect each other. A first mode in which one open end of the small-diameter hole path is positioned on the primary side in the straight tubular passage to communicate with the straight tubular passage according to the rotation position of the valve body, the first mode times. A second mode in which the valve shaft rotates 180 ° from the moving position and the other open end of the small-diameter hole path is positioned on the primary side in the straight tubular passage to communicate with the straight tubular passage. An intermediate position between the rotation position of the first mode and the rotation position of the second mode, in a state where the small-diameter hole path does not communicate the primary side and the secondary side in the straight tubular passage. wherein the pre-SL is configured to be switchable third mode for communicating the straight tubular passage by hole path of a large diameter Te.

In the steam trap of the present invention, the ball valve body is rotated by 180 ° around the valve shaft to switch between the first mode and the second mode, and the openings at both ends of the small-diameter hole path are opened in the straight tubular passage. By exchanging the primary side and the secondary side, a fluid such as steam passing through the small-diameter hole passage from the orifice hole located on the secondary side of the small-diameter hole passage is passed through the small-diameter hole path. Foreign matter that adheres to the vicinity of the orifice hole located on the primary side and causes clogging can be discharged to the secondary side and removed.

Further, in the third mode in which the ball valve body is rotated by 180 ° around the valve shaft to switch between the first mode and the second mode, the differential pressure is reduced by a large-diameter hole path. It is possible to forcibly flow out steam or the like staying on the primary side to the secondary side in a state where the momentum is weakened.

According to the present invention, even when the orifice hole is clogged and the efficiency of the steam trap itself or the steam piping system is reduced, the orifice hole of the ball valve can be opened only by rotating the ball valve body around the valve axis. The clogging can be cleared in a short time, and the original performance as a steam trap can be maintained.

The communication state of the ball valve in the first mode of the steam trap of the present embodiment is described in (1) top view, (2) (1) II-II sectional view, (3) (2) left view. (4) Partial transmission top view for explaining the positional relationship between the small-diameter hole path and the large-diameter hole path of the ball valve body in the piping case of (1) with different phases, (5) and (4). Right view of the piping case The communication state of the ball valve in the third mode of the steam trap of FIG. 1 is described in (1) top view, (2) (1) II-II cross-sectional view, (3) (2) left view, (1). 4) Partially transparent top view for explaining the positional relationship between the small-diameter hole path and the large-diameter hole path of the ball valve body in the piping case of (1) with different phases, (5) and (4). Rightward view of the piping case The communication state of the ball valve in the second mode of the steam trap of FIG. 1 is described in (1) top view, (2) (1) II-II cross-sectional view, (3) (2) left view, (1). 4) Partially transparent top view for explaining the positional relationship between the small-diameter hole path and the large-diameter hole path of the ball valve body in the piping case of (1) with different phases, and the piping of (5) and (4). Right view of the case It is a reverse cleaning pipe for clearing a clogging of a conventional steam trap, and (1) is an explanatory diagram showing a flow during normal operation and (2) a flow during maintenance for removing clogging.

An embodiment of the steam trap of the present invention will be described with reference to FIGS. 1 to 3.

The steam trap of the present embodiment is formed so that the tubular piping case 1 constituting the straight tubular passage and the primary side and the secondary side in the straight tubular passage of the piping case 1 can communicate with each other, and a valve is formed in the piping case 1. It includes a ball valve body 10 rotatably arranged around a shaft 3.

Said in straight pipe passage of the pipe casing 1 is formed with a valve chamber 2 Tamabentai 10 is built, Tamabentai 10, distribution in position in the valve chamber 2 is airtightly by airtight members It is sandwiched between the provided primary side tubular packing 4 and the secondary side tubular packing 5 so as to be slidable and rotatable.

In the ball valve body 10, one end of a valve shaft 3 inserted into a shaft hole 6 formed by communicating the piping case 1 and the valve chamber 2 so as to be orthogonal to the extending direction of the straight tubular passage of the piping case 1 is provided. A valve shaft connecting portion for fitting and fixing is provided.

Further, the ball valve body 10 is formed so as to be orthogonal to the valve shaft 3 and penetrate the ball valve body 10, and communicates the primary side and the secondary side in the straight tubular passage, and drains from steam by the differential pressure. A small-diameter hole 12 of a straight pipe is formed so as to be separable. Here, the hole passage does not mean a shallow one having no depth like a hole made in a plate material, for example, a certain depth (length), specifically, 5 mm with respect to a hole diameter of 1 mm. That is, it means a passage-shaped hole having a length of about 5 times the hole diameter. As in the present embodiment, the ball valve body 10 is not provided with an orifice as a hole, but is provided with a passage-shaped hole path (columnar orifice) having a length similar to the diameter dimension of the ball valve body 10. By communicating the primary side and the secondary side, the above-mentioned outflow rate can be suppressed, and as a result, the ability to reduce / suppress steam leakage can be enhanced.

In the present embodiment, the small-diameter hole path 12 has a diameter of 0.9 mm, passes on a virtual rotation shaft extending from the valve shaft 3 with respect to the central axis of the straight tubular passage of the piping case 1, and is straight tubular. It is formed on the valve shaft arrangement side in the passage, that is, on the inner bottom side of the straight tubular passage.

Further, the ball valve body 10 is formed so as to be orthogonal to the valve shaft 3 and penetrate the ball valve body 10, and the small-diameter hole path 12 does not communicate the primary side and the secondary side in the straight tubular passage. In the state, a large-diameter hole 13 of a straight pipe that is located along a straight tubular passage to communicate the primary side and the secondary side, reduces the differential pressure, and allows the fluid on the primary side to flow out to the secondary side. It is formed. That is, the small-diameter path 12 and the large-diameter path 13 are formed in a positional relationship so as not to open at the same time.

In the present embodiment, the large-diameter hole passage 13 has a diameter of 2.5 mm, passes on a virtual rotation shaft extending from the valve shaft 3, and is out of phase with the small-diameter hole passage 12, specifically. , It is orthogonal to the small diameter hole 12 in the valve axis direction field of view, and is formed on the valve shaft arrangement side in the straight tubular passage, that is, on the upper side in the straight tubular passage.

A handle 14 as an operation unit that rotates while sliding on the primary side tubular packing 4 and the secondary side tubular packing 5 is connected to the other end of the valve shaft 3 that protrudes outward from the piping case 1.

Then, in the steam trap of the present embodiment, the handle 14 is further rotated clockwise by about 90 ° from the rotation position of the first mode shown in FIG. 1, and the rotation position of the third mode shown in FIG. Further, it rotates clockwise by about 90 °, that is, it rotates between the rotation position of the first mode and the rotation position of the second mode shown in FIG. In the first mode, one open end of the small-diameter hole passage 12 is positioned on the primary side in the straight tubular passage to communicate with the straight tubular passage, and in the second mode, the other open end of the small-diameter hole passage 12 is opened. The end (opening) is positioned on the primary side in the straight tubular passage to communicate with the straight tubular passage, and in the third mode, the small-diameter hole 12 communicates with the primary side and the secondary side in the straight tubular passage. It is configured to communicate with the inside of the straight tubular passage by the large-diameter hole 13 of the valve shaft 3 in the untreated state.

Then, as shown in FIG. 1, one open end of the small-diameter hole passage 12 is positioned on the primary side in the tubular passage to communicate with the straight tubular passage, and the small-diameter hole passage 12 is connected to steam on the primary side. In the first mode in which the drain is separated by using the differential pressure between the primary side and the secondary side, when performing maintenance to remove the foreign matter stuck in the primary side of the small-diameter hole passage 12, the handle 14 is gripped. As shown in FIG. 3, the ball valve body 10 is rotated 180 ° clockwise via the valve shaft 3, and the open end of the small-diameter hole passage 12 previously located on the secondary side is passed through a straight tubular passage. This is the second mode in which the signal is located on the primary side of the inside and communicates with the inside of the straight tubular passage.

In the second mode, the fluid flows into the small-diameter hole 12 from the primary side, so that foreign matter adhering to the vicinity of the primary side of the small-diameter hole 12 and causing clogging can be discharged to the secondary side and removed. ..

Further, when performing maintenance to remove the foreign matter stuck on the primary side of the small-diameter hole 12 while driving in the second mode, the handle 14 may be rotated again to set the first mode.

As shown in FIG. 2, in the middle of the rotation operation of the handle 14, at the rotation position of the third mode provided between the first mode and the second mode, the small diameter hole 12 Instead, a large-diameter hole 13 communicates with the inside of the straight tubular passage. Therefore, in the case of the present embodiment, the drain and the foreign matter staying in the straight tubular passage on the primary side are forcibly discharged to the secondary side.

In this way, by rotating the handle 14 to rotate the ball valve body 10 around the valve shaft 3 and switching between the first mode and the third mode, the opening of the ball valve body 10 is clogged for a short time. It can be solved with, and the original performance as a steam trap is maintained.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention. For example, the small-diameter hole passage 12 and the large-diameter hole passage 13 formed by penetrating the ball valve body 10 are not limited to the positions of the present embodiment.

1 Piping case 2 Valve chamber 3 Valve shaft 4 Primary side annular packing 5 Secondary side annular packing 6 Shaft hole 10 Ball valve body 11 Valve shaft connection part 12 Small diameter hole path 13 Large diameter hole path 14 Handle

Claims (1)

A piping case with a valve chamber in the straight tubular passage and
A ball valve body that is rotatably arranged in the valve chamber about a valve shaft and is formed so that the primary side and the secondary side in the straight tubular passage can communicate with each other.
It is a steam trap equipped with
The ball valve body
A small-diameter hole in a straight pipe that penetrates the ball valve body formed orthogonally to the valve shaft, and a large-diameter hole in a straight pipe that penetrates the ball valve body formed orthogonally to the valve shaft. The roads are formed so that they do not intersect with each other .
Depending on the rotation position of the ball valve body,
A first mode in which one open end of the small-diameter hole path is located on the primary side in the straight tubular passage to communicate with the straight tubular passage.
Rotate 180 ° around the valve shaft from the rotation position of the first mode, and position the other open end of the small-diameter hole path on the primary side in the straight tubular passage to enter the straight tubular passage. Second mode to communicate,
An intermediate position between the rotation position of the first mode and the rotation position of the second mode, in which the small-diameter hole path does not communicate the primary side and the secondary side in the straight tubular passage. steam traps, characterized in that the is configured to be switchable third mode for communicating the interior of the straight tubular passage by hole connection before Symbol large diameter Te.

Images