JP2001041366A - Joint preventing fluid pressure loss - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint mechanism capable of effectively and surely connecting both of pipe bodies with each other under a condition that loss in pressure must be minimum. SOLUTION: When both the ends of pipe bodies to be connected with each other, are to be connected by means of a joint sleeve 5, in which packing materials 3 are interposed, elastic sheet material 6 is put on to the inner and outer surfaces of a coil shaped elastic wire rod 7 so as to be fixed in a space between the ends of the pipe bodies projected in the joint sleeve 5 from the packing material 3, and the inner packaging of an elastic cylindrical interposing body 8, to which the elastic sheet material 6 is bonded within the coil shaped elastic wire rod 7, is entirely integrated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint for preventing fluid pressure loss, and more particularly to a joint mechanism which can effectively and accurately connect both opposed pipes under a condition of a small pressure loss. is there.

[0002]

2. Description of the Related Art There are two types of joint mechanisms for connecting pipe ends, one in which a joint is inserted into the inner diameter side of both pipes to be connected and the other in which it is inserted into the outer diameter side. The one in which the fitting part is inserted on the inner diameter side is disadvantageous in that the effective cross-sectional area for flowing gas or liquid inside the connected pipe is limited by the inserted fitting part, It is necessary to employ a tightening and gripping means for appropriately gripping the tubes outside the two tubes.

On the other hand, in the case where the joint is provided outside the pipe to be connected, the effective cross-sectional area of the pipe to be connected is not limited by such a joint. The method is adopted. That is, packing and engaging means are employed to connect and connect between the end portion of the tube and the joint portion. In order to achieve effective sealing by packing, the housing is used to stably and securely pack the outer surface of the tube. It is intended to accurately hold the joint.

[0004]

In the above-mentioned conventional joint part set outside the connected pipe, the packing in the housing adopted between the pipe ends is smaller than the outer diameter of the pipe. It is common to set the inside of the housing in such a state that it has a large diameter and swells outward, and thus both the packings or the packing parts which are made larger in diameter than the outer diameter of the tube body are connected. The pressure of the fluid flowing through the pipe must be considerably reduced at the joint.

Therefore, it seems that some measures have been taken to avoid such a decrease in the fluid pressure at the pipe connecting portion. However, as long as the housing is set on the outer circumference of both pipes, If not only the housing but also the packing must be larger in diameter than the outer diameter of the connected pipe, and if such a fluid pressure in the pipe cannot be reduced considerably at the connection portion, and the structure is complicated, There is an inevitable disadvantage.

[0006]

SUMMARY OF THE INVENTION The present invention has been studied to solve the disadvantages and disadvantages of the prior art described above, and has a relatively simple structure by using a coiled elastic wire and an elastic sheet together. In addition, a fluid pressure loss preventing joint which hardly reduces the internal fluid pressure has been successfully obtained as follows.

(1) When connecting the pipe ends to be connected by a joint sleeve interposed with a packing material, the inner and outer surfaces of the coiled elastic wire material are formed between the pipe ends protruding into the joint sleeve from the packing material. A fluid pressure loss prevention joint, wherein an elastic tubular member is covered with an elastic sheet member and the elastic sheet member is bonded between the coiled elastic wires.

(2) The packing material interposed between the pipe ends to be connected is pressed against the end member of the joint sleeve by the fixing means so that a seal is set between the end member and the outer surface of the pipe end to be connected. The fluid pressure loss prevention coupling according to the above (1), wherein:

(3) One end of one of the elastic sealing materials covered on the inner and outer surfaces of the coiled elastic wire is folded at the end of the coiled elastic wire and is superposed and bonded to the other elastic sealing material. Any one of the above items (1) and (2)
The fluid pressure loss prevention joint according to any one of the above.

[0010]

When connecting the pipe ends to be connected by a joint sleeve interposed with a packing material, the elastic sheet is applied to the inner and outer surfaces of the coiled elastic wire between the pipe ends protruding into the joint sleeve from the packing material. By covering the inside of the coiled elastic wire and elastically connecting the elastic sheet material between the coiled elastic wires, the inner surface is substantially smooth within the thickness range of the coiled elastic wire. The ends of the two pipes are connected and substantially sealed by a thin layer member, and the pressure fluctuation of the fluid in the connected two pipes is appropriately enlarged or shrunk as appropriate to respond immediately. It reduces the increase in fluid pressure, compensates for the decrease in internal fluid pressure during contraction, and achieves smooth flow under substantially uniform pressure conditions.

[0011] Further, the packing material interposed between the pipe ends to be connected is pressed against the end member of the joint sleeve by the fixing means so as to be set in a seal with the outer surface of the pipe end to be connected. Thus, the joint sleeve can be properly set to seal between the outer surfaces of both pipe ends to be connected.

Further, the end of one of the elastic sealing materials covered on the inner and outer surfaces of the coiled elastic wire is folded back at the end of the coiled elastic wire and is superposed and bonded to the other elastic sealing material. The end of the elastic wire and the end of the elastic sealing material are effectively integrally joined together, and in particular, the connecting and sealing state between the ends of both elastic materials and the end of the connected pipe is stabilized to achieve a preferable connecting and connecting state. Let it form.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a joint for preventing a fluid pressure loss according to the present invention; FIG. 1 is partially shown in FIG. 1, and in connecting the ends 10, 10 of the pipes 1 to be connected with the joint sleeve 5 with the packing material 3 interposed therebetween, Elastic sheet materials 6, 6 are covered on the inner and outer surfaces of the coiled elastic wire 7 between the pipe ends 10, 10 projecting into the joint sleeve 5 from the end 5a, and the inside and outside of the elastic wire 7, The elastic tubular members 8 to which the elastic sheet members 6 and 6 are bonded 16 are internally connected. That is, the pipe end portion 10 of the elastic tubular intermediate body 8
The polymerized portion is attached to the pipe end 10 in a stable state as a diameter expanded from the normal state.

As shown in FIG. 2, a typical configuration of the above-mentioned elastic tubular interposition body 8 is to cover elastic inner and outer surfaces of a coiled elastic wire 7 with elastic sheets 6 and 6 made of rubber or the like. The inner and outer elastic sheet materials 6 and 6 are bonded to each other 16 between the wires 7 and 7, and furthermore, the elastic cylindrical interposition body 8 is formed.
The end of the elastic sheet material 6 is formed by folding and adhering the end of the elastic sheet material 6 to form a folded end portion 17 having a circular cross section. The material 6 forms a main part of the sealing function between the tube ends 10 and 10.

The manner in which the elastic tubular interposition body 8 is set on the tube end portion 10 in the sleeve 5 is as shown in FIG. 3, and as shown in FIG. With the part 10 inserted, the coiled elastic wire 7 is drawn by binding the elastic tubular interposer 8 as described above at a plurality of places with the tightening member 9 as shown in FIG.
Since the elastic sheet material 6 is folded in the length direction, such a folding intermediary body 8a is lifted by the lifting means 11.
To face the one end 10 of the tubular body described above, and positioned as shown in FIG.

When the tightening restraint by the tightening member 9 is released in a state where the folding intermediary member 8a is positioned as shown in FIG. It extends in the direction of the other tube end within the sleeve 5 and is covered by the other tube end 10b as shown in FIG. That is, between the ends of both pipes, the elastic tubular interposition body 8 has folded ends 17 having circular cross sections as shown in FIG.
As a result, an appropriate resilient sealing state is formed by the fitting setting using the folded end portion 17 having a circular cross section as a guide as shown in FIG.

That is, both pipe ends 10, 10 are connected to the joint sleeve 5
Are sealed by the packing members 3 provided at both ends of the tubular body 1. However, the flow of the fluid such as the liquid in the two tubular bodies 1 and 1 is prevented by the provision of the above-described elastic tubular interposed body 8. It is possible to form a smooth flow without entering into the inside and form a turbulent flow state, and to appropriately prevent and prevent the head loss.

The specific design conditions of the present invention as described above are as shown in the following Table 1 with respect to the nominal diameter of the tube 10 applied to the coiled elastic wire 7 made of spring steel.

[0019]

[Table 1]

The thickness of the elastic sheet material 6 made of rubber when the nominal diameter is as shown in Table 1 is as shown in Table 2 below. By using the body 8, a smooth flow was formed with respect to the water flow flowing in both pipes, and the head loss was effectively suppressed.

[0021]

[Table 2]

In the above-mentioned connection state, the middle portion of the elastic tubular interposition body 8 is slightly shorter in the vertical direction as shown in FIG. Thus, an engaging action with respect to the pipe end 10 is obtained. That is, at least in the up-down direction, the setting state 8a set and engaged with the tube ends 10, 10 in a state where the diameter is appropriately shorter (ie, reduced in diameter) than the inner diameter of both tube ends 10, 10.
Is maintained.

When fluid having a standard internal pressure flows through the pipes 1, 1 in the above-described manner, the pipes 1, 1 are positioned in a vertically smaller state than the pipes 1, 1. The elastic tubular intermediate body 8 is appropriately expanded in diameter by the internal pressure on the elastic sheet material 6 and is reduced in the left-right direction to have an inner diameter state 8b substantially matching the inner diameter of the tubular body 1, 1. In the position of the state 8b, the standard internal fluid passing through the tube forms a stable flow state with almost no pressure loss.

Further, under the condition that the fluid pressure flowing through the tube ends 10, 10 is partially higher, the elastic tubular interposition body 8 having the elastic sheet material 6 as described above is The radially expanded state 8c further outwardly extruded by the fluid pressure with respect to is partially formed, but the partial enlargement of the elastic tubular interposition body 8 is accurately suppressed by the coiled elastic wire 7 to partially It is possible to appropriately avoid abnormal deformation, maintain a substantially circular state, and prevent leakage and the like.

[0025]

According to the present invention as described above, a smooth flow condition with little pressure loss is formed in a sleeve joint which is connected to both ends by interposing a packing, and a partial It can secure a stable flow state in response to high pressure and low pressure as appropriate, and has effects such as simple configuration and easy loading / unloading operation for both pipe ends. This invention is industrially effective.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a state in which a fluid pressure loss preventing joint according to the present invention is adopted between both pipe ends to be connected, and a state in which a fluid pressure loss preventing joint is simply attached and between both pipe bodies. This also shows a state in which a fluid in a standard pressure state flows and a case in which a fluid at a standard pressure or higher flows.

FIG. 2 is a partially enlarged cross-sectional view of the elastic tubular intermediate body.

FIG. 3 is an explanatory view showing a stepwise manner in which a fluid pressure loss preventing joint according to the present invention is mounted between two pipe ends to which an elastic tubular intermediate body is to be applied.

FIG. 4 is an explanatory view showing an example of an operational relationship between the ends of the tubular body of the elastic tubular body according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 pipe to be connected 3 packing material 4 pressure welding material 5 joint sleeve 5a its end 6 elastic sheet material 7 coiled elastic wire 8 elastic tubular interposition body 8a folding interposition body 9 tightening material 10 pipe end 10b the other End of pipe 11 Lifting means 16 Adhesive part 17 Turned end

 ────────────────────────────────────────────────── ─── Continued on front page (72) Inventor Takeshi Kiuchi 2-11 Kita Beppu, Nishi-ku, Kobe-shi, Hyogo 20F Palace Ono F-term (reference) 3H015 BB06 BC05 BC08

Claims (3)

[Claims] When connecting between pipe ends to be connected by a joint sleeve interposed with a packing material, between the pipe ends protruding into the joint sleeve from the packing material to the inner and outer surfaces of the coiled elastic wire. A joint for preventing fluid pressure loss, wherein an elastic tubular interposed body, which covers an elastic sheet material and is bonded to the elastic sheet material, is connected between the coiled elastic wires. 2. A packing material interposed between pipe ends to be connected is pressed against an end member of a joint sleeve by a fixing means, and a seal is set between the end members of the joint sleeve and an outer surface of the pipe end to be connected. The fluid pressure loss prevention joint according to claim 1, wherein: 3. An end of one of the elastic sealing materials covered on the inner and outer surfaces of the coiled elastic wire is folded back at the end of the coiled elastic wire and is superposed and bonded to the other elastic sealing material. The fluid pressure loss prevention joint according to any one of claims 1 and 2,