JPH0619953Y2 - Air supply / exhaust tube for combustion appliances - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Use and Outline of the Invention] The present invention is directed to the entry and exit of rainwater into a supply / exhaust pipe of a combustion appliance, in particular, a supply / exhaust pipe having a structure in which a supply cylinder and an exhaust cylinder are concentrically arranged The present invention relates to a prevention structure, and by press-fitting an annular packing into a predetermined position with an auxiliary ring, it is possible to reliably prevent wind and rain from entering with a simple structure.

[Prior Art and Problems] Water heaters, heaters, etc. of a type installed close to an indoor wall surface employ a method of taking in combustion air from the outside and discharging combustion exhaust to the outside of the room, which are so-called FF. It is called a combustor.

In these FF combustors, as shown in FIG. 2, the instrument body (1)
Cylinder attached to the wall (W) and penetrated through this wall (W)
The method of connecting the (2) and the exhaust stack (3) to the combustion chamber (10) in the instrument body (1) is used. In particular, the cylinder
As shown in the figure, the air supply / exhaust pipe consisting of (2) and the exhaust pipe (3) is inserted concentrically into the sleeve (S) inserted into the through hole (H) of the wall surface (W). And is usually a cylinder
The exhaust stack (3) is inserted into (2). And this cylinder
(2) is a fan (1) for air supply arranged at the bottom of the combustion chamber (10).
The other exhaust stack (3) is connected to the combustion chamber.
It is connected to an exhaust port (12) formed on the top wall of (10).

As a result, the outdoor air is sucked from between the supply cylinder (2) and the exhaust stack (3) and supplied to the combustion chamber (10) by the fan (11), and the combustion exhaust generated in the combustion chamber (10) is exhausted. It is discharged from the mouth (12) to the outside of the room through the exhaust pipe (3).

Normally, a supply / exhaust cylinder (E) consisting of a combination of the supply cylinder (2) and an exhaust cylinder (3) is adapted to be housed and fixed in the sleeve (S) through a certain gap. As shown in Figure 3,
The sleeve (S) and the air supply / exhaust pipe (E) are installed so as to incline outward with respect to the wall surface (W). This is so that even if rainwater partially enters the through holes (H), they are discharged to the outside.

However, in the case of this conventional example, when the wall surface (W) is thin, it is not possible to sufficiently prevent the rainwater from entering.

According to the present invention, the "supply cylinder (2) and the exhaust cylinder (3) are concentrically inserted to form the supply and exhaust cylinder (E).
In a sleeve (S) that penetrates the wall surface (W) with a certain gap therebetween, in the supply / exhaust cylinder of the combustion device,
The purpose is to prevent wind and rain from entering with a simple structure.

[Technical Means] The technical means of the present invention taken to solve the above-mentioned problem is "an auxiliary ring (which is slidably press-fitted into the supply cylinder (2) and is loosely fitted into the sleeve (S)). 4) is provided, and an annular airtight means having a large degree of contraction is press-fitted to the outdoor side of the auxiliary ring (4) in the gap (G) between the supply cylinder (2) and the sleeve (S), and The airtight means and the auxiliary ring (4) are brought into close contact with each other. '

[Operation] The technical means of the present invention operates as follows.

Sleeve (S) and air supply / exhaust pipe installed in a penetrating state on the wall surface (W)
Since the annular airtight means is press-fitted into the gap (G) from (E), when wind and rain intrudes from the outside in the state where the device is attached, these are shut off by the airtight means.
In particular, since the airtight means is made of an elastic material having a large degree of contraction, in the loose fitting state of the air supply / exhaust cylinder (E) and the sleeve (S), even if they are eccentric to each other, the gap (G)
Airtightness can be secured all around. In addition, since the auxiliary ring (4) which is externally fitted to the cylinder (2) in a press-fit state and the airtight means are in close contact with each other, the insertion posture of the annular airtight means is the auxiliary ring.
It matches the end face of (4).

[Effects] The present invention having the above-described configuration has the following unique effects.

The gap (G) between the sleeve (S) and the air supply / exhaust pipe (E) is reliably blocked by the annular airtight means, so that the entry of wind and rain can be reliably prevented.

In addition, inserting the annular airtight means into the gap (G) and press-fitting the auxiliary ring (4) into a predetermined position will set the airtight means in an appropriate posture, so that the airtight means can be easily inserted. Is.

Furthermore, since the degree of contraction of the airtight means is large, the airtightness can be secured even if there is a misalignment of the equipment.

[Embodiment] An embodiment of the present invention will be described below with reference to FIG. First
The air supply / exhaust pipe (E) of the embodiment shown in the figure is composed of a supply cylinder (2) and an exhaust pipe (3) like the conventional one, and these are wall surfaces.
Sleeve (S) that is inserted in the through hole (H) of (W)
It is housed inside, and the end on the indoor side, like the conventional one,
It is communicatively connected to the air supply circuit and the exhaust circuit in the instrument body (1).

Incidentally, in this drawing, the relationship with the instrument body (1) is omitted.

The exhaust cylinder (3) and the supply cylinder (2) of this embodiment are both outside cylinders.
(3a) (2a) and the indoor side cylinders (3b) (2b) are slidably connected, and depending on the thickness of the wall surface (W), the supply cylinder (2) and the exhaust cylinder (3) The whole length of the can be adjusted.
Further, in order to ensure the concentricity between the supply cylinder (2) and the exhaust cylinder (3), the outer circumference of the outdoor cylinder (3a) of the exhaust cylinder (3) and the outer circumference of the indoor cylinder (3b) are Spacers (23) and (23) are arranged.

The air supply / exhaust cylinder (E) having the above-described configuration is inserted into the sleeve (S), and the sleeve (S) has a through hole (inclined downward toward the outdoor side as shown in the figure). It is housed in H). Therefore, as shown in the figure, the tubular portion (61) of the flange plate (6) on the indoor side that holds the sleeve (S) projects so as to incline downward toward the outdoor side. (61)
One end of the sleeve (S) is fitted in the. As a result, the sleeve (S) is inserted into the through hole (H) in a predetermined posture.

The flange plate (6) is provided with a packing on the indoor end surface of the wall surface (W).
Since it is attached via (P ₁ ), the inside of the outer peripheral gap of the sleeve (S) is sealed by this flange plate (6). The outer side of the outer peripheral gap is sealed with a sealing agent (P ₂ ) such as silicon rubber.

As described above, the air supply / exhaust cylinder (E) is inserted into the sleeve (S) fixed in the through hole (H) of the wall surface (W) in an inclined state. ) In the vicinity of the indoor side end of the outdoor cylinder (2a), an annular seal packing (4
0) is externally fitted, and the auxiliary ring (4) is externally fitted and press-fitted to the end portion of the outdoor side tubular body (2a) that is on the indoor side.

Then, as shown in the figure, the seal packing (40) is set in a state of contacting the end surface of the auxiliary ring (4), and the air supply / exhaust cylinder (E) is inserted into the sleeve (S). In the state, the seal packing (4
The flat surface of the end part of (0) becomes a right angle, and this seal packing (4
The cross section of 0) will be compressed exactly in the radial direction.

In this embodiment, the supply cylinder (2) and the exhaust pipe (3) are separated into the indoor cylinders (2b) (3b) and the outdoor cylinders (2a) (3a). , Because they are configured to be slidably fitted to each other,
Once the sleeve (S) is installed, once supply cylinder (2) and exhaust stack
It is possible to insert the outdoor cylinders (2a) and (3a) of (3) and then insert the seal packing (40) and the auxiliary ring (4) from the indoor side. In this case, seal packing (4
After setting 0) and the auxiliary ring (4) in place,
The outdoor cylinders (2a) (3a) and the indoor cylinders (2b) (3b) of the supply cylinder (2) and the exhaust cylinder (3) are matched to the relationship with the equipment body (1) installed indoors. ), And set the fitting position with each inner cylinder (2b)
(3b) will be separately connected to the air supply circuit and the exhaust circuit of the device body (1). When the air supply / exhaust pipe (E) is installed by this procedure, the insertion position of the seal packing (40) can be arbitrarily adjusted.

As the seal packing (40) in the above embodiment, an elastic material having a large degree of contraction, which is a material capable of ensuring airtightness between the outside and the inside of the gap (G), such as a closed-cell type sponge, is suitable. Is.

The seal packing (40) has a rectangular cross section, but an auxiliary ring that contacts the interior side of the seal packing (40).
(4) consists of a tubular portion that fits over the exhaust pipe (3), an annular portion that rises from one end thereof, and an annular tongue piece that projects from the outer peripheral end of the tubular portion. Seal packing (40)
It is designed to face the end face of. Therefore, the gap (G)
Even if the seal packing (40) inserted in the press-fit state is meandering in this gap (G), the auxiliary ring (4)
By inserting, the meandering is corrected and the proper posture is set in the gap (G).

Incidentally, the air supply / exhaust pipe (E) of the above-mentioned embodiment is adopted in the above-mentioned conventional example, and can be connected and communicated with the inside of the instrument body (1) by a method using the elbow (L) for air supply / exhaust circuit connection, The air supply / exhaust pipe (E) can also be connected by a configuration in which it is directly connected to the air supply / exhaust circuit of the instrument body (1).

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the present invention, and FIGS. 2 and 3 are explanatory views of a conventional example. In the figure, (2) ... Supply cylinder (3) ... Exhaust cylinder (E) …… Air supply / exhaust cylinder (W) …… Wall surface (S) …… Sleeve (4) …… Auxiliary ring (G) …… Gap

Claims (1)

[Scope of utility model registration request] 1. A supply / exhaust cylinder (E) is formed by concentrically inserting a supply cylinder (2) and an exhaust cylinder (3), and this supply / exhaust cylinder (E) is a wall surface (W).
In the supply / exhaust cylinder of the combustion device, which is configured to be housed in the sleeve (S) penetrating through it through a certain gap, the supply cylinder (2)
An auxiliary ring (4) that is slidably press fitted into the sleeve (S) and is loosely fitted in the sleeve (S), and the supply cylinder (2) and the sleeve (S) are provided.
Combustion equipment in which the airtight means and the auxiliary ring (4) are brought into close contact with each other while press-fitting an annular airtight means with a large degree of contraction into the outdoor side of the auxiliary ring (4) in the gap (G) between Air supply and exhaust pipe.