JPH06159591A - Steam trap with piping joint - Google Patents

Abstract

PURPOSE:To provide a steam trap with a piping joint, in which no foreign matter is introduced into a valve or valve seat part of the trap, for which a switch valve is separately provided at the time of changing the trap with no need of closing the valve, and in which there is no need of replacing a screen at the same time when the trap is changed. CONSTITUTION:An inlet route 5, a trap communication route 6, and an outlet route 7 are provided on a piping joint member 3. A screen 9 is provided between the inlet route 5 and the trap communication route 6. A shut-off valve 30 is mounted in the screen 9. The trap communication route 6 and a trap inlet route 11 are connected together. A trap outlet route 8 and the outlet route 7 are connected together. The piping joint member 3 and the trap casing 1 are fixed by a bolt through a mounting flange 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam trap for automatically discharging condensed water such as condensed water, air, or non-condensable gas from the system without discharging steam from the steam system. Especially, depending on the various pipe mounting conditions,
It is related to what can be attached to the mu trap. The steam trap is attached to the steam pipe or the steam using device, but in order to efficiently discharge the condensate, the steam trap is often attached to the lower end of the steam pipe or the steam using device. At these lower ends, the mounting space and mounting direction of the steam trap were often limited by other pipes and devices. A steam trap with a pipe joint is used as a trap that can be attached to a relatively wide range of objects even if the attachment space and direction of the trap are limited.

[0002]

2. Description of the Related Art A conventional steam trap with a piping joint is disclosed in, for example, JP-A-61-160699. This is a combination of a piping member that can be switched between vertical piping and horizontal piping and a steam trap via a connection member.The mounting space of the trap is narrow, or the vertical or horizontal direction. Even if the pipe member is properly rotated to connect the pipe,
A mutrap can be attached.

[0003]

SUMMARY OF THE INVENTION In the above conventional one,
When disassembling and checking or replacing the steam trap, a separate on-off valve must be provided on the inlet side, and this on-off valve must be closed to prevent steam or condensate from flowing into the trap. There was a problem that could not be disassembled and replaced. Moreover, in the above-mentioned conventional one, since the strainer cannot be attached,
There was a problem that foreign matter such as rust and scale in the piping was mixed and adhered to the valve of the steam trap to cause vapor leakage. on the other hand,
In the case where the strainer is provided in the casing of the steam trap, there is a problem that the strainer must be replaced at the same time when the trap is replaced. The trap discharges only the condensate water by opening and closing the built-in valve portion and valve seat portion, but with long-term use, the valve portion and valve seat portion are deformed due to wear and steam is leaked. Therefore, the trap used for a certain period of time is replaced with a new trap.In this case, in the case where the trap casing has a strainer built-in, the strainer which is not worn at all with the valve and the valve seat portion is used. Had to be replaced at the same time, which was uneconomical.

Therefore, the technical problem of the present invention is that the steam trap can be disassembled and replaced without providing a separate on-off valve on the inlet side, a strainer can be attached, and the strainer can be replaced every time the trap is replaced. -To obtain a steam trap with a piping joint that does not replace the nozzle.

[0005]

The technical means of the present invention taken to solve the above technical problems is a trap case.
In which a trap casing and a pipe joint member are combined to rotate and fix the trap casing and the pipe joint member in accordance with the pipe state, an inlet passage, a trap communication passage, and an outlet passage are formed in the pipe joint member. A strainer is provided between the inlet passage and the trap communication passage to remove foreign matter that has flowed in, and a closing member for blocking the inlet passage and the trap communication passage is provided.

[0006]

The operation of the above technical means is as follows.
The pipe joint member is connected to the steam pipe connected to the steam using device. The mixed fluid of condensed water and steam generated in the steam using device flows into the steam trap through the pipe joint member, and only the condensed water is discharged out of the system through the outlet passage. By arranging the strainer between the inlet passage of the pipe joint member and the trap communication passage, foreign matter in the fluid flowing in from the inlet passage of the pipe joint member is strained by this strainer and trapped in the trap section. There is no inflow.
Therefore, vapor leakage due to foreign matter does not occur in the trap valve and valve seat portion. Also, since the strainer is provided in the pipe joint member and the closing member is provided between the inlet passage and the trap communication passage, only the trap needs to be exchanged when replacing the steam trap. Need not be replaced at the same time as the trap, the uneconomical effect can be eliminated, and there is no need to provide a separate on-off valve on the inlet side of the pipe joint member separately.

[0007]

EXAMPLE An example showing a concrete example of the above technical means will be described (see FIGS. 1 and 2). In this embodiment, a disk type steam trap is used as the steam trap. FIG. 1 is a cross-sectional view showing a state in which a vertical pipe is attached, and FIG. 2 is a left side view of FIG. In FIG. 1, the steam trap 2 is formed by the trap casing 1 and the lid 15, and the pipe joint member 3 and the trap casing 1 are fixed to each other with the bolt 4 shown in FIG. The pipe joint member 3 has an inlet passage 5 and an outlet passage 7 which are coaxial with each other, a trap communication passage 6 which communicates with the trap portion 2 is provided in a central portion of the pipe joint member 3, and a cylindrical shape is provided between the inlet passage 5 and the trap communication passage 6. Then, a screen 9 having a large number of pores is arranged to form a strainer. In the screen 9, a shut-off valve 30 as a shut-off member that shuts off the inlet passage 5 and the trap communication passage 6 is arranged. The lower portion of the shutoff valve 30 has a rod-like shape 31 which penetrates the packing 32 and the fixed plug 33 to project a chamfered portion 35 at the end thereof to the outside. The state shown in FIG. 1 shows a state in which the inlet valve 5 and the trap communication passage 6 are blocked by the shutoff valve 30. A cylindrical brush 36 having a shape along the inner diameter of the screen 9 is attached by snap rings 37 and 38 just below the stop valve 30. When the double chamfer 35 is rotated to open / close the stop valve 30, the brush 36 is also rotated to clean the inner surface side of the screen 9. The inner surface of the cylinder of the screen 9 communicates with the inlet passage 5 through the stop valve 30, and the outer surface of the cylinder communicates with the trap communication passage 6. The lower end of the screen 9 is fixed to the pipe joint member 3 by a plug 10 which is screwed.

The steam trap portion 2 is formed on the trap inlet passage 11 connected to the trap communication passage 6, the variable pressure chamber 13, the disc valve 12 freely arranged in the variable pressure chamber 13, and the lower face of the disc valve 12. It is formed by the cylindrical groove 16 and the trap outlet passage 8 connected to the cylindrical groove 16. The trap outlet passage 8 is connected to the cylindrical groove 17 and communicates with the outlet passage 7. A gasket 1 for maintaining airtightness is provided at the end of the cylindrical groove 17 and the trap inlet passage 11.
Attach 8,19. The mounting flange 21 is formed in the shape of a flat plate ring and has a step portion on the inner surface, and the fixing ring 20 attached to the trap casing 1 is fitted with the step portion so as to face the flange portion 22 provided on the pipe joint portion 3. The trap casing 1 and the pipe joint member 3 are combined by arranging them and fixing them with two bolts 4.

Next, the operation will be described. The state shown in FIG.
The inlet passage 5 and the outlet passage 7 are arranged vertically from the top to the bottom, and the trap portion 2 is also vertically attached. For example, with the trap portion 2 kept in the vertical direction, When changing the horizontal direction, the pipe state can be appropriately changed by loosening the bolt 4 and rotating the pipe joint member 3 by 90 degrees.

When the closing valve 30 is pushed down to communicate the inlet passage 5 and the trap communication passage 6, the mixed fluid of condensed water and steam flowing from the inlet passage 5 passes through the pores of the screen 9. As a result, the foreign matter in the fluid is taken over and accumulated in the lower portion of the disc valve 12 via the trap communication passage 6 and the trap inlet passage 11. When the steam pressure in the variable pressure chamber 13 decreases due to natural heat dissipation, the force for pushing up the disc valve 12 becomes stronger than the force for pushing down the disc valve 12, and the disc valve 12 rises and opens. When the disc valve 12 opens, the condensate passes through the cylindrical concave groove 16 and the trap outlet passage 8 as well as the cylindrical concave groove 17, reaches the outlet passage 7, and is discharged outside the system. When the condensate is discharged and the steam flows into the variable pressure chamber 13, the velocity of the fluid passing through the lower surface of the disk valve 12 instantly rises and the static pressure decreases, and the steam pressure in the variable pressure chamber 13 also rises. Thus, the disc valve 12 is closed to prevent steam from being discharged to the outlet passage 7 side.

By making the shut-off valve 30 in the state shown in FIG. 1 and shutting off between the inlet passage 5 and the trap communication passage 6,
The trap 2 can be replaced without closing a separate on-off valve (not shown) connected to the inlet passage. Also, the screen 9 can be cleaned at the same time by rotating the stop valve 30.

By disposing the screen 9 in the pipe joint member 3, foreign matter in the fluid does not flow into the disc valve 12 portion of the steam trap portion 2 and vapor leakage due to the mixture of foreign matter is prevented. If you can replace the trap that has been used for a long time with a new one,
Only the traps need to be replaced, and the screen 9 will not be replaced at the same time.

In the present embodiment, an example in which a disk type steam trap is used as a steam trap has been shown, but other conventional traps such as a float type trap and a bucket type trap, Alternatively, a bimetal type trap or a membrane type trap can be used.

[0014]

The present invention produces the following unique effects. By providing the closing member that shuts off the inlet passage of the pipe joint member and the trap communication passage, the trap can be disassembled and replaced without providing a separate on-off valve on the inlet side, and the inlet passage and the trap communication passage can be connected. By installing a strainer between the two, it is possible to prevent vapor leakage due to foreign substances adhering to the trap valve and valve seat, and it is not necessary to replace the strainer at the same time when replacing the trap. Economic efficiency can be eliminated.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a steam trap with a piping joint according to the present invention.

FIG. 2 is a left side view of FIG.

[Explanation of symbols]

 1 Trap casing 2 Steam trap part 3 Piping joint member 4 Bolt 5 Inlet passage 6 Trap communication passage 7 Outlet passage 9 Screen 12 Disk valve 13 Transformer chamber 21 Mounting flange 30 Closing valve 36 Brush

Claims (1)

[Claims] 1. A combination of a trap casing and a pipe joint member for rotating and fixing the trap casing and the pipe joint member according to a pipe state, wherein the inlet passage and the trap connecting member are connected to the pipe joint member. A strainer is formed between the inlet passage and the trap communication passage to form a passage and an outlet passage, and a strainer is arranged between the inlet passage and the trap communication passage to remove foreign matter that has flowed in, and a closing member for blocking the inlet passage and the trap communication passage is provided. A characteristic steam trap with a piping joint.