JP2021105414A - Condensed water accumulation pipe - Google Patents

Abstract

To provide a condensed water accumulation pipe capable of opening a valve of a condensed water discharge port even under high pressure to discharge condensed water, without needing a power source upon discharging the condensed water.SOLUTION: A condensed water accumulation pipe 100 comprises an inlet 1 in which steam or condensed water flows, a connection port 6 to a steam trap, and a plug 14 provided with a condensed water discharge port 15. The condensed water accumulation pipe comprises: a float body 9 that is mounted inside a body part 5, and comprises a float 9a and a valve that opens and closes the condensed water discharge port; a stopper 3 that is fixed inside the body part, and regulates an upper limit position of the float body; and a spring 13 that is compressed or expanded to give energizing force to the float body when the valve part closes the condensed water discharge port due to steam pressure.SELECTED DRAWING: Figure 1

Description

The present invention relates to a condensed water storage tube, which does not require a power source for discharging condensed water and can discharge condensed water by opening a valve of a condensed water discharge port even under high pressure.

Generally, a device called a steam trap is widely used to discharge the condensed water generated in the steam pipe. There are two types of steam traps: a mechanical and intermittent type, and a continuous type, such as a nozzle type, which converts condensed water into steam from a nozzle hole and discharges it.

The applicant has proposed the condensed water discharge device shown in Patent Documents 1 and 2. This condensed water discharge device is a nozzle-type steam trap, and is equipped with a nozzle having a length of 20 to 40 mm and a hole diameter of 0.2 to 18 mm. As a result, the condensed water generated in the steam pipe becomes steam and is continuously discharged to the outside. The generation of condensed water in the steam piping equipment may fluctuate greatly, and the condensed water discharge device is provided with a condensed water storage tube in case of an increase.

In Patent Document 2, an upper limit sensor and a lower limit sensor for detecting the water level are provided in the condensed water storage pipe, and when the water level exceeds the upper limit sensor, the discharge valve of the solenoid valve is opened to bypass the nozzle that releases steam and discharge the condensed water. I made it possible. Since this mechanism requires electricity, if there is no power supply facility nearby, it is necessary to prepare a power generation module that utilizes the temperature difference as an example.

On the other hand, in Patent Document 1, when the water level of the condensed water storage tube rises, the float rises and the weight valve separates from the discharge port, the condensed water is discharged, and when the water level drops, the float falls and the weight valve drains. A mechanical and intermittent water level adjustment mechanism that closes the mouth is provided. This mechanism does not require power supply equipment, but when the vapor pressure inside the pipe is as high as 1 to 3 MPa, the force with which the valve is pressed against the outlet is very strong, and a large float is required to separate it. Become.

Japanese Unexamined Patent Publication No. 2015-137745 Japanese Unexamined Patent Publication No. 2016-080002

An object of the present invention is to provide a condensed water storage tube which does not require a power source for discharging condensed water and can discharge condensed water by opening a valve of a condensed water discharge port even under high pressure.

The condensed water storage pipe according to the present invention is a plug (14) provided with an inlet (1) through which steam or condensed water flows, a connecting port (6) to a steam trap (30), and a condensed water discharge port (15). A float body (9), which is a condensed water storage pipe provided with and, which is mounted inside the main body (5) and is composed of a float (9a) and a valve portion (9b) for opening and closing the condensed water discharge port (15). ), A stopper (3) that is fixed inside the main body (5) and regulates the upper limit position of the float body (9), and a valve portion (9b) that uses steam pressure to provide a condensed water discharge port (15). When closed, it is characterized by being provided with a spring (13) that is compressed or stretched to impart a urging force to the float body (9).

The valve portion (9b) is characterized by being formed by a connecting rod (12) and a conical valve (4).

The spring (13) is provided with an upper end support portion (10) and a lower end support portion (11), and the lower end support portion (11) is composed of a plurality of lower end support portions (11) having different heights in a ring shape and can be replaced. It is characterized by being possible.

The float body (9) is characterized in that the float (9a) is formed in a long cylindrical shape, and the valve portion (9b) is also used as the bottom portion of the float (9a).

According to the condensed water storage tube of the present invention
(1) When the valve portion (9b) closes the condensed water discharge port (15) by steam pressure, a spring (13) is provided to give buoyancy to the float (9a) against the closing force. It is not necessary for the buoyancy of 9a) to have a large shape corresponding to the vapor pressure. When buoyancy is generated in the float (9a), the float body (9) rises and the valve portion (9b) opens the condensed water discharge port (15), so that the condensed water can be discharged.
(2) Since the float (9a) of the float body (9) is raised by buoyancy, the valve portion (9b) is separated from the condensed water discharge port (15) without requiring electricity, and the condensed water discharge port (15) is closed. Can be opened.
(3) The stopper (3) can regulate the upper limit position of the float (9a) and prevent the falling condensed water from hitting the float (9a) and causing a malfunction.
(4) Since the plug (14) can be removed, it is convenient when the condensed water discharge port (15) is worn and replaced. Easy maintenance.
(5) By appropriately setting the amount of condensed water discharged from the steam trap (30), it is possible to operate in a state where the condensed water is always accumulated, and since the condensed water storage pipe does not overflow with the condensed water, the steam trap (30) ) Can reduce steam leakage from the nozzle.

Since the valve portion (9b) is formed by the connecting rod (12) and the conical valve (4), the condensed water discharge port (15) can be satisfactorily closed by the steam pressure.

Since the lower end support portion (11) of the spring (13) is composed of a plurality of ring-shaped interchangeable lower end support portions (11) having different heights, the force of the spring (13) can be adjusted.

The float body (9) has a structure in which the float (9a) is formed in a long cylindrical shape and the valve portion (9b) is also used as the bottom of the float (9a). It is not necessary to provide the 12) and the valve (4), and the float (9a) can be made into a larger shape.

It is sectional drawing which shows the internal structure of the condensed water storage tube. Example 1 It is a figure which shows that the lower end support part of a spring is composed of a plurality of types. It is the whole view of the condensed water discharge device which uses a condensed water storage tube. It is an internal structural drawing of the nozzle type steam trap of FIG. It is operation explanatory drawing of the condensate water storage tube of FIG. It is operation explanatory drawing of the condensate water storage tube of FIG. It is operation explanatory drawing of the condensate water storage tube of FIG. It is operation explanatory drawing of the condensate water storage tube of FIG. It is sectional drawing which shows the internal structure of the condensed water storage tube. Example 2 It is sectional drawing which shows the internal structure of the condensed water storage tube. Example 3

Hereinafter, the condensed water storage tube according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a cross-sectional view showing the internal structure of the condensed water storage tube 100. The condensed water storage tube 100 has a tubular main body 5. A connecting pipe 8 for connecting to the lead-in pipe 2 is provided in the upper part of the main body 5, and there is an inlet 1 through which steam or condensed water from the piping equipment flows. On the side of the main body 5, there is a connecting port 6 to a steam trap 30 that discharges condensed water as steam. A plug 14 provided with a condensed water discharge port 15 is attached to the bottom of the main body 5.

Inside the main body 5, a float body 9 that generates buoyancy with condensed water is provided. The float body 9 includes a float 9a and a valve portion 9b. The valve portion 9b includes a connecting rod 12 connected to the lower end of the float portion 9a and a valve 4 provided at the lower end of the connecting rod 12 to open and close the condensed water discharge port 15. Further, a stopper 3 which is fixedly provided inside the main body 5 and regulates the upper limit position of the float 9a, and a spring 13 which urges the float body 9 upward when the valve 4 is closed by steam pressure. Is provided. The stopper 3 is provided with a through hole through which steam or condensed water can pass. The spring 13 is a compression spring having one end connected to the float 9a and the other end supported by the upper surface of the plug 14 and contracting when the valve 4 is pressed downward by steam pressure.

As shown in FIG. 1, the float 9a is in the level (MAX) position when there is no vapor pressure inside the main body 5. The spring 13 has a predetermined length, the lower end is supported by the ring-shaped lower end support portion 11, and the upper end is similarly supported by the ring-shaped upper end support portion 10. The upper end support portion 10 is attached to the side surface of the float 9a, and the lower end support portion 11 is in contact with the upper surface of the plug 14 and is supported. When steam pressure is applied to the inside of the main body 5, the valve 4 is pushed down by the steam pressure, enters the condensed water discharge port 15 of the plug 14, engages with the bottom of the conical hole, and closes the condensed water discharge port 15.

A nozzle-type steam trap 30 is connected to the tip of the connecting port 6. The contact port 6 does not open to the outside, and the vapor pressure of the piping equipment is applied to the inside of the main body 5. When the valve 4 closes the condensed water discharge port 15, the float 9a is connected to the valve 4 by the connecting rod 12, so that the float 9a is lowered to the level (MIN) position. Even if the float 9a is lowered, the lower end of the spring 13 does not move, so that the spring 13 is compressed and contracted. By compressing the spring 13, an upward urging force is applied to the float body 9.

FIG. 2 is a diagram showing that the lower end support portion of the spring 13 is composed of a plurality of types. As the lower end support portion 11, three types of lower end support portions 11a, 11b, and 11c having different heights h1, h2, and h3 are provided so as to be replaceable. If the height of the lower end support portion 11 is different, for example, when h2 having a height higher than h1 is attached, the upper end of the spring 13 is connected to the float 9a, and the float 9a is pressed by the stopper 3, so that the spring 13 is compressed. Being shrunk. As a result, a load is applied to the spring 13 in the initial state, and the spring 13 can cope with a stronger vapor pressure.

FIG. 3 is an overall view of the condensed water discharge device 200 in which the condensed water storage tube 100 is used. The condensed water discharge device 200 is a device that converts condensed water into steam and removes it from steam piping equipment, and is connected to a condensed water storage pipe 100 that temporarily stores the condensed water flowing from the lead-in pipe 2 and a condensed water storage pipe 100. A nozzle-type steam trap 30 that converts condensed water into steam and discharges it to the second discharge pipe 21 via the first discharge pipe 20 is provided. The condensed water exits the connecting port 6 of the condensed water storage tube 100 and enters the steam trap 30. The condensed water in the first discharge pipe 20 is steamed by the nozzle of the steam trap 30 and then condensed, and is not mixed with dust or dirt. Therefore, the first discharge pipe 20 may not be merged with the second discharge pipe 21 and may be piped to the reuse destination.

As shown in FIG. 3, the first valve 25 is a manual type and can block the condensed water flowing into the condensed water storage tube 100. The first valve 25 is opened during operation. The second valve 26 is also a manual type and can shut off the first discharge pipe 20 of the steam trap 30. The second valve 26 is opened during operation. The third valve 27 is also a manual type and is closed during operation and opened during maintenance. By opening the steam trap 30, the condensed water collected at the bottom of the steam trap 30 can be discharged to the second discharge pipe 21. When condensed water of a predetermined level or higher is accumulated in the condensed water storage pipe 100, the condensed water is discharged to the second discharge pipe 21.

FIG. 4 is an internal structural diagram of the nozzle-type steam trap 30 of FIG. The steam trap 30 includes an inlet portion 30a, a main body portion 30b, an outlet portion 30c, and a condensed water draining portion 30d. A connecting pipe 35 for connecting to the condensed water storage tube 100 is provided at the inlet portion 30a. A filter 31 is provided in the main body 30b to purify the condensed water 16 pushed out to the steam generation nozzle 32. The first discharge pipe 20 is connected to the outlet portion 30c. The condensed water 16 is re-evaporated by the steam generation nozzle 32, the temperature is lowered to recondense 38, and the condensed water 16 is discharged to the first discharge pipe 20. The condensed water draining portion 30d is provided with a filter replacement plug 36, which serves as an outlet for the filter 31. Although the condensed water 16 of the main body 30b depends on the performance of the steam generating nozzle 32, a certain amount is accumulated during operation, and the steam is disturbed by the condensed water and may go out directly from the steam generating nozzle 32. Will not be.

The steam generating nozzle 32 has a length of 20 to 40 mm and a nozzle hole having a hole diameter of 0.2 to 18 mm in the center. When the condensed water 16 passes through the steam generation nozzle 32, the flow velocity increases, the pressure decreases, and the condensed water 16 re-evaporates 33, so that the volume increases and the resistance increases. By utilizing the resistance of steam, there is an advantage that the diameter of the nozzle hole can be made larger. That is, the discharge amount of the condensed water 16 can be increased.

5 to 8 are operation explanatory views of the condensed water storage tube 100 of FIG. FIG. 5 shows a state in which there is no vapor pressure inside the main body 5. The float body 9 is in a high position, and the upper end of the float 9a is in contact with the stopper 3. The spring 13 has a predetermined length and is supported by the lower end support portion 11 and the upper end support portion 10. The upper end support portion 10 is attached to the side surface of the float 9a, and the lower end support portion 11 is placed on the upper surface of the plug 14.

FIG. 6 shows a state in which vapor pressure is applied to the inside of the main body 5. The conical valve 4 is pushed down by steam pressure, enters the condensate outlet 15 of the plug 14, engages with the conical hole, and closes the condensate outlet 15. When the valve 4 closes the condensed water discharge hole 15, the float 9a and the valve 4 are connected by the connecting rod 12, so that the float 9a is lowered to a low position (see the level (MIN) in FIG. 1). Even if the float 9a is lowered, the lower end of the spring 13 is in contact with the upper surface of the plug 14 and does not move, so that the spring 13 is compressed and contracts.

FIG. 7 shows a state in which the condensed water 16 suddenly enters the inside of the main body 5 from the piping equipment. In that case, the buoyancy g acts upward on the float 9a. Then, the force f for contracting the spring 13 becomes as small as f−g, so that the spring 13 extends. When the spring 13 is extended, the valve 4 is raised as shown in FIG. Since the valve 4 does not block the condensed water discharge port 15, that is, the condensed water discharge port 15 is opened, the condensed water 16 is discharged from the condensed water discharge port 15 to the second discharge pipe 21. When the water level drops, the float 9a rises above the water surface and loses buoyancy, so that the spring 13 contracts again. Then, the valve 4 is pushed downward to close and close the condensed water discharge port 15.

FIG. 9 is a cross-sectional view showing the internal structure of the condensed water storage tube 100. Similar to the first embodiment, the condensed water storage tube 100 of the second embodiment has an inlet 1 through which the condensed water flows, a connecting port 6 to the steam trap 30, and a condensed water discharge port 15 attached to the plug 14. Be prepared.

Inside the main body 5, a float body 9 that generates buoyancy with condensed water, a stopper 3 that regulates the upper limit position of the float body 9, and a spring 13 that urges the float body 9 upward are provided. The float body 9 includes a float 9a and a valve portion 9b. The float 9a is formed in a long cylindrical shape, and a hemispherical bottom portion also serves as a valve portion 9b. There is no valve 4 as in the first embodiment, and there is no connecting rod 12.

As shown in FIG. 9, in a state where there is no vapor pressure inside the main body 5, the spring 13 has a predetermined length, and the float 9a of the float body 9 is in contact with the stopper 3. The spring 13 is supported by the lower end support portion 11 and the upper end support portion 10. The upper end support portion 10 is attached to the side surface of the float 9a, and the lower end support portion 11 is in contact with the upper surface of the plug 14.

When steam pressure is applied to the inside of the main body 5, the float 9a is pushed down by the steam pressure, the bottom portion enters the condensed water discharge port 15 of the plug 14, and engages with the bottom of the condensed water discharge port 15 to engage with the condensed water discharge port 15. Close up. The bottom of the float 9a descends so as to close the condensed water discharge port 15, but since the lower end of the spring 13 is in contact with the plug 14 and does not move, the spring 13 is compressed and contracts. The spring 13 is a compression spring. In the second embodiment, since the valve is also used at the bottom of the float (9), the float 9a can be made into a long cylindrical shape having a large buoyancy without a connecting rod.

In FIG. 9, when the condensed water 16 enters the inside of the main body 5 from the piping equipment, the buoyancy g acts upward on the float 9a due to the condensed water. Then, the force f for contracting the spring 13 becomes as small as f−g, so that the spring 13 extends. When the spring 13 extends, the float 9 rises. When the float 9a rises, the bottom portion of the float 9 that also serves as a valve does not block the condensed water discharge port 15, so that the condensed water 16 is discharged to the second discharge pipe 21. When the condensed water is discharged and the water level of the condensed water drops, the buoyancy is lost, the spring 13 contracts again due to the steam pressure, the float 9 is pushed downward, and the condensed water discharge port 15 is closed.

FIG. 10 is a cross-sectional view showing the internal structure of the condensed water storage tube 100. In this configuration, the spring 13 is a tension spring. As shown in FIG. 10, one end of the spring 13 is fixed to the upper surface 17a of the flange of the inverted T-shaped member 17 provided below the float 9a, and the other end is connected to the inner ceiling surface 18a of the opening 18 of the plug 14. Will be done. When the valve portion 9b of the float body 9 closes the condensed water discharge port 15 by steam pressure, the spring 13 is pulled and stretched to give the float body 9 an upward urging force.

According to the condensed water storage tube 100 of Examples 1 to 3, since the spring 13 is provided, the float 9 can be urged upward against the vapor pressure that closes the valve 4. The float 9 does not need to have a large shape corresponding to the vapor pressure in order to obtain buoyancy.

The present invention is suitable as a condensed water storage tube that does not require a power source for discharging condensed water and can discharge condensed water by opening the valve of the condensed water discharge port even under high pressure.

1 Inlet 2 Pull-in pipe 3 Stopper 4 Valve 5 Main body 6 Connection port 8 Connection pipe 9 Float body 9a Float 9b Valve part 10 Upper end support part 11 Lower end support part 11a, 11b, 11c (different height) Lower end support part 12 Connection Rod 13 Spring 14 Plug 15 Condensed water discharge port 16 Condensed water 17 Inverted T-shaped member 17a Flange upper surface 18 Opening 18a Inner ceiling surface 20 1st discharge pipe 21 2nd discharge pipe 25 1st valve 26 2nd valve 27 3rd Valve 30 Steam trap 30a Inlet 30b Main body 30c Outlet 30d Condensed water drain 31 Filter 32 Steam generation nozzle 33 Re-evaporation 34 Plug 35 Connecting pipe 36 Plug 37 Connecting pipe 38 Recondensing 100 Condensed water storage pipe 200 Condensed water drainage device

Claims (4)

Condensed water storage tube provided with an inlet (1) through which steam or condensed water flows, a connection port (6) to a steam trap (30), and a plug (14) provided with a condensed water discharge port (15). And
A float body (9) mounted inside the main body (5) and composed of a float (9a) and a valve portion (9b) that opens and closes a condensed water discharge port (15).
A stopper (3), which is fixedly provided inside the main body (5) and regulates the upper limit position of the float body (9),
When the valve portion (9b) closes the condensed water discharge port (15) due to steam pressure, a spring (13) that is compressed or expanded to give a urging force to the float body (9),
Condensed water storage tube characterized by being equipped with. The condensed water storage tube according to claim 1, wherein the valve portion (9b) is formed of a connecting rod (12) and a conical valve (4). The spring (13) is provided with an upper end support portion (10) and a lower end support portion (11), and the lower end support portion (11) is composed of a plurality of lower end support portions (11) having different heights in a ring shape and can be replaced. The condensed water storage tube according to claim 1, wherein it is possible. The condensation according to claim 1, wherein the float body (9) has the float (9a) formed in a long cylindrical shape, and the valve portion (9b) is also used as the bottom portion of the float (9a). Water storage tube.

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