JPH10205669A - Connecting device of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb any vibrating being transmitted and to manufacture in an inexpensive manner. SOLUTION: A tubular elastic body 5 is inserted through the tip of a connecting pipe 2, then it is inserted into the end connection of a casing 1. An engaged part 10 installed on a peripheral surface of the elastic body 5 is positioned in space between a ring stepped part 9 on an inner surface of the end connection and a mounting plate 4, and a positioning part 6 installed on an inner circumferential surface of the elastic body 5 is fitted with a ring flange part 7, thereby positioning the connecting pipe 2 which is clamped tight to the end connection via the elastic body 5 without coming into contact with the end connection inner surface and the mounting plate 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe connection device.
More specifically, the present invention relates to a pipe connection device that connects to a vibrating body such as a pump and supplies fluid such as hot water, water, and gas.

[0002]

2. Description of the Related Art Conventionally, an O-ring system as shown in FIG. 3 has been used as a connecting device for a pipe for supplying a fluid such as hot water, water or gas. The connection pipe 2 has an annular flange portion 7 formed near the pipe end, and an O-ring 20 is attached to a cylindrical surface between the end portion and the annular flange portion 7, and is incorporated into a connection port provided in the connected body 30. . On the inner surface of the connection port, there is formed an annular step 9 in which the small-diameter portion 12 and the large-diameter portion 11 have different inner diameters, and the cylindrical end of the connection pipe 2 is inserted into the small-diameter portion 12. The large diameter portion 1 is located between the
An O-ring 20 is provided to seal the inner surface 1 and the outer cylindrical surface of the connecting pipe 2. The mounting plate 4 is fixed with screws 3 from the outside of the connection port, and one side surface of the annular flange 7 is fixed to the mounting plate 4 so as not to come off the connection port.

[0003] However, when the connected body 30 generates vibration during operation, the vibration may be transmitted through the connecting pipe 2 connected to the connected body 30 to generate noise. For example, when the connected object 30 is a circulating pump in a bath apparatus, the connected object 30 is transmitted to a connected heat exchanger (not shown), and furthermore, its vibration may resonate in the heat exchanger to generate noise. Was. On the other hand, as shown in FIG. 4, there is known a connecting device in which a vibration-absorbing rubber 21 for absorbing vibration is interposed and connected to a connecting portion as shown in FIG. This means that the vibration-proof rubber 21 absorbs the vibration from the circulating pump separately from the connection part by the O-ring 20, prevents transmission to each part, and reduces noise.

[0004]

However, in this connection device, although the vibration isolating rubber 21 somewhat reduces the transmission of vibration, it has not been possible to obtain a sufficient effect in reducing noise. This is because the mounting plate 4 is in contact with both the annular flange 7 of the connection pipe 2 and the casing 1 of the circulating pump, so that the vibration transmission route is not completely blocked. By interposing the vibration isolating rubber 21, a connection point (between the joint 22 in which the O-ring 20 is incorporated and the casing 1, between the joint 22 and the O-ring 20,
(Between the ring 20 and the connection pipe 2), the number of inspection points for leakage increases, and the number of parts increases, which increases the complexity, resulting in an increase in cost. Therefore, the pipe connection device of the present invention solves the above problems, reliably absorbs vibration transmitted from a vibrating body that generates vibration,
Moreover, it is an object to provide a connection device which can be manufactured at low cost.

[0005]

According to a first aspect of the present invention, there is provided a pipe connecting apparatus in which the end of a connecting pipe is inserted into a connecting port of a connected body via a sealing elastic body. In a piping connection device for holding the connection pipe from the outside of the connection port with a mounting plate and connecting the connection pipe to the connected body,
An annular flange is formed near the distal end of the connection pipe, and an annular step including a small-diameter portion and a large-diameter portion is formed inside the connection port, and the sealing elastic body has a tubular shape with both ends opened. Formed on the inside and covers the annular flange portion, and is disposed on the large diameter portion of the connection port,
A flange fitting portion whose insertion position is regulated in the annular step portion, and a sealing portion that covers the connection pipe on the distal end side from the annular flange portion and seals between the connection pipe and the inner surface of the connection port are integrated. The gist is that the flange fitting portion is pressed by the mounting plate in the insertion direction, and the connection pipe is fixed to the connected body without contacting the connected body and the mounting plate. .

In the pipe connecting apparatus according to the first aspect of the present invention, a tubular elastic body is inserted through the connecting pipe, the annular flange is fitted inside and covered, and a distal end side of the annular flange is provided. And the sealing portion seals between the connection pipe and the inner surface of the connection port. Then, the large-diameter portion of the connection port regulates the insertion position of the flange fitting portion of the elastic body, and the mounting plate presses the flange fitting portion in the insertion direction. Therefore,
The connection pipe is fixed to the connected body via the elastic body without contacting the connected body and the mounting plate. As a result, the elastic body absorbs vibration at the connection between the connected body and the connection pipe,
Blocks the transmission of vibration.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of a pipe connection device of the present invention will be described below. FIG. 1 shows a connecting device of a connecting pipe 2 as one embodiment, and shows a cross-sectional view in an assembled state, and FIG. 2 shows an arrow view thereof. Conventionally, a bath apparatus is provided with a circulating pump (not shown) for circulating hot water in order to heat hot water in a bathtub, and the circulating pump has an elastic pipe connected to a heat exchanger (not shown). 5 are connected. Further, a connection port for connecting the connection pipe 2 is provided in the casing 1 of the circulation pump,
On the inner surface of the connection port, there is formed an annular stepped portion 9 having a different inner diameter composed of the small diameter portion 12 and the large diameter portion 11. An annular flange 7 is formed in the connection pipe 2 near the cylindrical end. The elastic body 5 is formed in a tubular shape, and has a center hole through which a connecting pipe is inserted, a locking portion 10 positioned between the annular step 9 and the mounting plate 4 on the outer peripheral surface, and an annular flange on the inner peripheral surface. The positioning part 6 for positioning the connection pipe 2 by fitting the part 7 is integrally formed. The elastic body 5 is provided between the connecting pipe 2 and the small-diameter portion 12 and the large-diameter portion 11 so that the connecting pipe 2 is fixed to the casing 1 without contacting the casing 1 and the mounting plate 4 of the circulation pump. Interposed.
The inner surface of the small-diameter portion 12 and the outer surface of the connection pipe 2 are sealed by annular projections 8 provided integrally on the inner and outer surfaces of the interposed elastic body 5. The material of the elastic body 5 is
It is made of a rubbery material having elasticity such as NBR, EPT, and silicone rubber. The elastic body 5 is positioned from the outside by applying the mounting plate 4 to a contact surface 15 formed at an end of the elastic body 5 so as not to fall outside the connection port. The hole 13 in the mounting plate 4 is provided to be larger than the outer diameter of the annular flange 7 of the connection pipe 2 and smaller than the outer diameter of the locking portion 10 of the elastic body 5. In addition, the guide portion 1 that enters the hole 13 of the mounting plate 4 and guides the insertion of the mounting plate 4 is provided in the elastic body 5.
4 are provided integrally. The inner diameter of the guide portion 14 is set to an appropriate size so that the elastic body 5 is easily fitted when the elastic body 5 is fitted into the connection pipe 2 and the elastic body 5 does not easily fall off the connection pipe 2. The mounting plate 4 is fixed with screws 3 from around the connection port of the circulating pump, and the locking portion 10 of the elastic body 5 is locked by the mounting plate 4 and is prevented from coming off. Therefore, the connection pipe 2 is fixed via the elastic body 5 without contacting the casing 1 and the mounting plate 4 of the circulation pump. In addition, the concave portion on the outer peripheral surface of the locking portion 10 is a useless slim portion.

Next, a procedure for attaching the connection pipe 2 to the connection port will be described. First, the connection pipe 2 is inserted into the hole 13 of the mounting plate 4. Then, the tip of the connection pipe 2 is inserted into the hole of the elastic body 5, the elastic body 5 is deformed to widen the hole, and the annular flange 7 of the connection pipe 2 is fitted into the positioning portion 6 inside the elastic body 5. At this time, the elastic body 5 is attached such that the annular projection 8 provided on the inner surface of the elastic body 5 is in a position direction in which the cylindrical outer surface at the end of the connection pipe 2 is sealed. At this time, the elastic body 5 does not easily fall off from the connection pipe 2 because the annular flange 7 is fitted in the positioning part 6, and the mounting plate 4 has the hole 13 of the elastic body 5. Since it is smaller than the outer diameter of the locking portion 10, it does not fall out of the connection pipe 2. Therefore, even when the connection pipe 2 is removed at the time of repair, the elastic body 5 and the mounting plate 4 are not connected to the connection pipe 2.
The components are not separated from each other, and the loss of these components can be prevented.

Subsequently, when the connection pipe 2 is inserted into the connection port of the circulating pump, the annular projection 8 provided on the outer surface of the elastic body 5 seals the inner surface of the small diameter portion 12 at the back of the connection port. Therefore,
The annular projections 8 provided on the inner and outer surfaces of the elastic body 5 completely seal the connection pipe 2 and the inner surface of the small-diameter portion 12, so that water or hot water does not leak outside.

Finally, the mounting plate 4 is fixed to the outer surface of the connection port with screws 3 from the outside of the connection port. The elastic body 5 fits the annular flange 7 into the positioning portion 6 to position the connection pipe 2. Therefore, the connection pipe 2 is attached to the connection port via the elastic body 5 and
It is fixed by the mounting plate 4 via the elastic body 5. As a result, even if vibration is generated by the operation of the circulation pump, the vibration is absorbed by the elastic body 5 and is not transmitted to the connection pipe 2, and the circulation pipe connected to one of the connection pipes 2 vibrates. Does not resonate and does not generate noise. On the contrary, no vibration is transmitted from the circulation pipe to the casing 1 of the circulation pump.

The embodiments of the present invention have been described above.
The present invention is not limited to these embodiments at all, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention. For example, the elastic body is not limited to a rubber material, and may employ another material as long as it has a sealing property and has elasticity capable of absorbing vibration. The source of the vibration is not limited to one-way configuration, and may be a two-way configuration.
For example, a connection device that does not transmit vibrations to each other even by the entire vibration including the connection pipe, such as a water heater mounted on a camper, may be used.

[0012]

As described above in detail, according to the pipe connecting apparatus of the present invention, since the vibration is absorbed and the vibration is not transmitted, the noise can be reduced, and furthermore, the excellent effect that it can be manufactured at a low cost can be obtained. Play.

[Brief description of the drawings]

FIG. 1 is a schematic view of a pipe connection device as one embodiment.

FIG. 2 is a view as seen from an arrow Y of a pipe connection device as one embodiment.

FIG. 3 is a schematic view of a conventional pipe connection device.

FIG. 4 is a schematic view of a conventional pipe connection device provided with an elastic body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Connection pipe 3 Screw 4 Mounting plate 5 Elastic body 6 Annular concave groove 7 Annular flange part 8 Annular projection 9 Annular step part 10 Locking part 11 Large diameter part 12 Small diameter part 13 Hole 14 Guide part 15 Contact surface 20 O Ring 21 Anti-vibration rubber 22 Joint

Claims (1)

[Claims] 1. A pipe for connecting the connection pipe to the object to be connected by inserting the tip of the connection pipe into the connection port of the object to be connected via an elastic body for sealing and pressing the connection pipe from outside the connection port. In the connection device, an annular flange portion is formed near the distal end of the connection pipe, and an annular step portion including a small-diameter portion and a large-diameter portion is formed inside the connection port. Is formed in the shape of a tube with an opening, and the annular flange is fitted inside and covered,
A flange fitting portion disposed at the large-diameter portion of the connection port, the insertion position of which is regulated at the annular step; and covering the connection pipe on the distal end side with respect to the annular flange, and connecting the connection pipe to the connection pipe. A seal portion for sealing between the inner surface of the mouth and a sealing portion is integrally provided, and the flange fitting portion is pressed by the mounting plate in the insertion direction so that the connection pipe does not contact the connected object and the mounting plate. And a pipe connecting device fixed to the connected object.