JP2008180249A - Pipe joint, on-vehicle tank, and powder transporting bulk vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe joint for allowing easy mounting/demounting of a pipe without producing metal chipping during mounting/demounting. <P>SOLUTION: The pipe joint 2 comprises a male side joint 20 having a circumferential contact face of a predetermined curvature formed on the outer face at one end of a first tubular member, and a circumferentially swollen locking portion formed at a base bottom portion of the contact face, and a female side joint 30 having a circumferential seal material holding face of a predetermined curvature formed on the inner face at one end of a second tubular member corresponding to the contact face, a circumferential seal material held by the seal material holding face, a first hook provided on the side of the second tubular member and having a first pawl portion to be locked to the locking portion of the male side joint, and a second hook provided on the side of the second tubular member in opposition to the side of the second tubular member where the first hook is provided and having a second pawl portion to be locked to the locking portion of the male side joint. The first pawl portion of the first hook and the second pawl portion of the second hook each have a surface contact member to be put in surface contact with the locking portion. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe joint for connecting a pipe for conveying powder or liquid, an in-vehicle tank using the pipe joint, and a bulk vehicle for powder transportation including the in-vehicle tank.

  When transporting bulk powders, for example, edible powders such as milled flour (hereinafter described as an example of wheat flour) from a mill to a customer's processing factory such as a bread factory, Had packed the flour in a 25kg-packed bag, etc., and then transported the packed flour by truck. Increasingly, the flour is loaded and loaded into an on-board tank of a tank truck while being in bulk form, and the flour loaded on the on-board tank is transported. A tank truck that transports such bulk powder is referred to as a bulk vehicle.

  This bulk car transport allows you to transport the flour without bagging and deliver it directly to the silo (storage tank) of the customer's processing plant. In recent years, this method of transportation has been widely used because it can be transported and the bagging process at the milling factory and the removal work from the bag at the customer's processing factory are no longer necessary. It has been.

  The bulk vehicle for transporting the bulk flour is, for example, a bulk vehicle 130 as shown in FIG. 9, and the flour is loaded on the vehicle-mounted tank 132 of the bulk vehicle 130 and transported. In this figure, both the method of putting flour into the in-vehicle tank 132 of the bulk car 130 at the mill and the method of discharging flour at the customer's factory are drawn at the same time. That is, when flour is put into the bulk car 130 at the mill, for example, the flour milled at the mill is conveyed to the second floor as a loading place, and the bellows is placed on the on-vehicle tank 132 of the bulk car 130 parked on the first floor. It is naturally dropped through the transfer tube 134 and is loaded into the in-vehicle tank 132 of the bulk car 130 for loading.

  In the loading of the flour, the flour is fed from the two feeding hatches 136 on the front side and the rear side provided on the upper surface of the in-vehicle tank 132 of the bulk car 130 by, for example, two bellows-shaped transfer tubes 134. The air is vented from the central input hatch 136. Without being limited to this example, any of the input hatches 136 may be used as appropriate for the input and ventilation of the flour. In addition, when the flour is discharged into the silo at the customer's factory, it is discharged from the discharge port 138 of the discharge hatch 137 and is transported to the silo by pneumatic transport through the transport tube 140. At this time, a hydraulic cylinder (not shown) pushes up the front part of the on-vehicle tank 132 to tilt the on-vehicle tank 132, and drives a compressor mounted on the bulk vehicle 130 or a compressor (not shown) installed at a customer factory. The compressed air generated is introduced into the upper part of the front end of the in-vehicle tank 132 to pressurize the inside of the tank, and further, the flowing air supplied from the flow plate disposed inside the discharge hatch 137 is discharged through the flow air pipe. Thus, the flour inside the discharge hatch is fluidized and discharged from the discharge port 138, and the flour is conveyed to the silo by the pressurized air supplied through the injector pipe.

  By the way, when flour is put into the on-vehicle tank 132 of the bulk vehicle 130, the flour thrown into the on-vehicle tank 132 may rise and adhere to the inner wall surface of the on-vehicle tank 132. The flour adhering to the inner wall surface of the on-vehicle tank 132 must be washed and removed after the flour is discharged into the silo at the customer's factory.

  In the above-mentioned bulk car, when cleaning the flour adhering in the in-vehicle tank, the discharge hatch is opened, and the worker enters the in-vehicle tank and cleans the adhering flour from the opening of the discharge hatch. When opening the discharge hatch, it is necessary to remove the flow air pipe and the injector pipe connected to the discharge hatch.

For connecting these pipes, for example, a pipe joint as in Patent Document 1 may be used. It is as follows. In other words, it consists of a socket and a plug that is inserted into the plug insertion hole of the socket. An engaging groove that engages with the eccentric cam part of the tightening lever is provided on the outer periphery of the plug insertion side, and the plug is inserted into the hole at the back of the plug insertion hole of the socket. At this time, a gap is formed between the plug and the plug on the insertion side, and an annular packing having an inner peripheral surface opened in a U-shape or V-shape is interposed in the gap, so that the plug This is a pipe joint that can seal the insertion-side tip.
Japanese Utility Model Publication No. 60-40890

  By the way, in the above-described pipe joint, when the plug is inserted into the socket, the center lines of both must be inserted almost perfectly, and the center lines of both are shifted or they are obliquely crossed. If it was, it was impossible to insert. Therefore, in conventional bulk vehicles for powder transportation, flex-master coupling (made by Yokohama Rubber Co., Ltd.), which is flexible to some extent, was used to connect the flow air piping and injector piping. Required a lot of effort. Therefore, the contact surface formed on the outer surface of the distal end portion of the male joint can be easily attached and detached with the seal member disposed on the inner surface of the distal end portion of the female joint, A pipe joint is used in which a hook claw portion fixed to a female-side joint is hooked and pulled to an overhang portion.

  However, when this pipe joint is used, shear friction occurs in the hook part hooked on the protruding part of the male joint when the pipe joint is attached or detached, and a metal face is generated. Here, since the air supplied through the flow air pipe and the injector pipe is used for conveying edible flour, mixing of metal chips into the flour is not allowed.

  An object of the present invention is to provide a pipe joint that is easy to attach and detach pipes and that does not generate metal facets when attached and detached, an in-vehicle tank using the pipe joint, and a bulk vehicle for powder transportation using the in-vehicle tank.

  The pipe joint of the present invention has a circumferential contact surface having a predetermined curvature formed on the outer surface of one end of the first tubular member, and a circumferentially formed on the base portion of the contact surface. A male joint having a locking portion, a circumferential sealing material holding surface having a predetermined curvature formed on the inner surface of one end of the second tubular member corresponding to the contact surface, A first sealing member having a circumferential shape held by the sealing member holding surface, and a first claw portion provided on a side portion of the second tubular member and locked to the locking portion of the male side joint. A second hook that is provided on a side of the second tubular member that is opposite to the side on which the first hook of the second tubular member is provided, and that is engaged with the locking portion of the male joint. A second hook having a claw portion, and at least one of the first hook and the second hook is connected to the male side joint. And a female joint having a handle for bringing the male joint into the female joint side, the pipe joint having the contact surface of the first hook. The first claw portion and the second claw portion of the second hook include a surface contact member that is in surface contact with the locking portion.

  In the pipe joint of the present invention, the surface contact member provided in the first claw portion of the first hook and the second claw portion of the second hook is a circumferential direction corresponding to the shape of the locking portion. It is preferable to have a surface shape extending in the direction.

  Moreover, in the piping joint of this invention, it is preferable that the said surface contact member is formed with resin.

  The in-vehicle tank of the present invention is an in-vehicle tank of a bulk vehicle for transporting powder, in which bulk powder is loaded and transported, and the powder is discharged from the discharge hatch, and the outside of the discharge hatch. The pipe joint of the present invention is used for attaching and detaching at least one of a flow air pipe and an injector pipe connected to the pipe.

  Moreover, the bulk vehicle for powder transportation of this invention is equipped with the vehicle-mounted tank of this invention, It is characterized by the above-mentioned.

  According to the pipe joint of the present invention, the first claw portion of the first hook of the female side joint and the second claw portion of the second hook have the surface contact member that makes surface contact with the locking portion of the male side joint. Further, it is possible to prevent the occurrence of a metal face from the contact point between the claw portion and the locking portion when the pipe joint is attached or detached.

  Moreover, according to the vehicle-mounted tank of the present invention, the pipe joint of the present invention is used for the connection of the flow air pipe and the injector pipe connected to the outside of the discharge hatch. No metal face is generated from the contact point, and it is possible to prevent the metal face from being mixed into the air supplied via the flow air pipe and the injector pipe.

  Moreover, according to the bulk vehicle for powder transportation of the present invention, since the in-vehicle tank of the present invention is used, the metal joint is not generated when the pipe joint connecting the air pipe for flow and the injector pipe is attached and detached. There is no metal chip mixed into the powder.

  Hereinafter, a pipe joint according to an embodiment of the present invention will be described with reference to the drawings. 1 is a side view showing a state in which a pipe joint is coupled, FIG. 2 is a side view showing a male side joint constituting the pipe joint, and FIG. 3 is a side view showing a female side joint constituting the pipe joint.

  The male joint 20 constituting the pipe joint 2 is formed on a circumferential contact surface 22 having a predetermined curvature formed on the outer surface of one end portion of the first tubular member 21 and a base portion of the contact surface 22. And a locking portion 23 protruding in a circumferential shape.

  The female joint 30 constituting the pipe joint 2 is provided with an overhang portion 32 at one end of the second tubular member 31, and as shown in the cross-sectional view of FIG. A circumferential sealing material holding surface 33 having a predetermined curvature formed corresponding to the contact surface 22 of the male joint 20, and an O-ring (seal member) 34 held by the sealing material holding surface 33 It has. The second tubular member 31 is located in the circular opening of the hook fixing member 35, and the hook fixing member 35 is fixed to the side wall of the second tubular member 31.

  As shown in FIG. 3, the female side joint 30 is provided with a first hook 36 and a second hook 37. The first hook 36 is formed with a first claw portion 38 that is engaged with the engagement portion 23 of the male joint 20 at one end portion, and the other end portion is rotatably fixed to the hook fixing member 35. . Note that the rotation range of the first hook 36 is restricted by a rotation restricting member 39 provided in the overhang portion 32.

  The second hook 37 is formed on the opposite side of the position where the first hook 36 is provided and the second tubular member 31, and is locked to the locking portion 23 of the male joint 20 at one end. A second claw portion 40 is formed, and the other end side is rotatably fixed to the hook fixing member 35. Further, on the other end portion side of the second hook 37, a handle 45 for bringing the contact surface 22 of the male joint 20 into contact with the O-ring 34 of the female joint 30 and pulling the male joint 20 toward the female joint 30 is provided. Is provided. When separating the male and female of this pipe joint, first, the handle 45 is swung in a direction away from the second tubular member 31. Then, the second hook 37 is unlocked, and a hookable member 35 is allowed to rotate. The first hook 36 is unlocked by the rotation. When the male and female pipe joints are joined, the procedure is reversed.

  FIG. 5 is a view showing the shapes of the first claw part 38 and the second claw part 40. As shown in this figure, the first claw part 38 and the second claw part 40 include a contact member 41 at a contact part with the locking part 23. The contact member 41 is formed of resin, rubber, or the like, and is fitted in the recesses at the tips of the first claw portion 38 and the second claw portion 40. By this contact member 41, the first claw portion 38 and the second claw portion 40 and the locking portion 23 are in surface contact. In addition, after fitting the contact member 41 in the recessed part of the front-end | tip of the 1st claw part 38 and the 2nd claw part 40, the contact member 41 is crimped by crimping the front-end | tip of the 1st claw part 38 and the 2nd claw part 40. Can be prevented from falling off. Further, the contact member 41 may be pressed into a recess having a narrower entrance and a wider back so as to prevent the dropout.

  According to the pipe joint according to the present embodiment, the contact member 41 of the first claw portion 38 of the first hook 36 and the second claw portion 40 of the second hook 37 of the female side joint 30 is engaged with the male side joint 20. Since the surface contact is made with respect to the portion 23, it is possible to prevent a metal face from being generated from the contact point between the claw portion and the locking portion when the pipe joint is attached or detached.

  Note that the shapes of the first claw portion 38 of the first hook 36 and the second claw portion 40 of the second hook 37 are not limited to those shown in FIG. 5, but as shown in FIG. The portion 38 and the second claw portion 40 may include a metal contact member 42 having a surface shape extending in the circumferential direction corresponding to the shape of the locking portion 23. That is, the metal locking member 42 may be welded to the first claw portion 38 and the second claw portion 40. In this case, since the contact area between the first claw portion 38 and the second hook 37 and the locking portion 23 is further increased, it is possible to effectively prevent the occurrence of metal facets.

  Moreover, you may make it form the contact member which has the surface shape provided in the circumferential direction with which the 1st nail | claw part 38 and the 2nd nail | claw part 40 are equipped with resin, rubber | gum, etc. FIG. Similarly to the contact member 41 shown in FIG. 5, the contact member is fitted into the concave portions at the tips of the first claw portion 38 and the second claw portion 40, and then the first claw portion 38 and the second claw portion 40. The contact member can be prevented from falling off by caulking the tip of the contact member or by press-fitting the contact member. In this case, the generation of metal facets can be prevented more effectively.

  In the present embodiment, the contact surface 22 of the male joint 20 is brought into contact with the O-ring 34 of the female joint 30 on the other end side of the first hook 36 of the female joint 30, and the male joint 20 is A handle 45 that pulls the female joint 30 toward the female joint 30 is provided, but a handle that pulls the male joint 20 toward the female joint 30 may be provided on both the first hook 36 and the second hook 37.

  Next, an in-vehicle tank of a powder transport bulk vehicle using the pipe joint according to the embodiment will be described. FIG. 7 is a diagram showing a configuration of a powder transport bulk vehicle according to an embodiment of the present invention.

  As described above, the bulk vehicle 10 for transporting powder shown in FIG. 7 is a tank truck for transporting bulk flour, and is provided with an in-vehicle tank 12 for storing flour at the top of the vehicle body. Flour is supplied and loaded from two front and rear hatches (input hatches) 14 provided on the upper surface of the vehicle-mounted tank 12. At this time, the hatch (air vent hatch) 14 provided between the hatches 14 into which the flour is introduced is opened, and the air sent along with the flour is vented. In addition, the hatch 14 into which the flour is introduced is not limited to the two front and rear hatches, and any hatch 14 may be used as the input hatch depending on the form of the loading factory. For example, the front and center hatches 14 may be input hatches, the rear hatch 14 may be an air release hatch, the center and rear hatches 14 may be input hatches, and the front hatch 14 may be an air release hatch.

  Further, when discharging the flour from the in-vehicle tank 12, the front portion of the in-vehicle tank 12 is pushed up by a hydraulic cylinder (not shown) so that the flour does not remain in the in-vehicle tank 12, and the in-vehicle tank 12 is tilted to 10 or the compressor installed in the loading factory (both not shown) is driven, and the generated compressed air is introduced into the upper front end of the vehicle-mounted tank 12 to pressurize the inside of the tank, and the discharge shown in FIG. As shown in the figure of the hatch portion, the flowing air supplied from the side wall of the discharge hatch 16 via the flow air pipe 50 is ejected from a fluid plate (not shown) arranged inside the discharge hatch 16 to The inner flour is fluidized and discharged from the discharge port 17, and is supplied by pressure feed air supplied via the injector pipe 52. To transport the flour until the silo. Here, the connection of the air pipe for flow 50 and the injector pipe 52 is performed using the pipe joint 2 according to the present embodiment.

  According to the in-vehicle tank of the bulk vehicle for powder transportation of the present embodiment, the pipe joint according to the present embodiment is used for the connection of the flow air pipe and the injector pipe connected to the outside of the discharge hatch. At the time of attaching and detaching, the metal face is not generated from the contact point between the claw part and the locking part, and it is possible to prevent the metal face from being mixed into the air supplied through the flow air pipe and the injector pipe.

  In the above-described embodiment, the pipe joint according to the present embodiment is used for the piping of an in-vehicle tank of a bulk vehicle for powder transportation. However, the piping of a tank truck that transports liquids such as edible oil and oil is used. You may use for.

It is a side view of a pipe joint concerning an embodiment of the invention. It is a side view of the male side joint which concerns on embodiment of this invention. It is a side view of the female side joint which concerns on embodiment of this invention. It is sectional drawing of the overhang | projection part of the female side joint which concerns on embodiment of this invention. It is a figure which shows the shape of the nail | claw part of the hook which concerns on embodiment of this invention. It is a figure which shows the shape of the nail | claw part of the hook which concerns on embodiment of this invention. It is a figure which shows the structure of the bulk vehicle for powder transportation concerning embodiment of this invention. It is a figure which shows the structure of the discharge hatch of the bulk vehicle for powder transportation concerning embodiment of this invention. It is a figure which shows the structure of the conventional bulk vehicle for powder conveyance.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Pipe joint, 10 ... Bulk vehicle for powder transport, 12 ... Car tank, 14 ... Hatch, 16 ... Discharge hatch, 17 ... Discharge port, 20 ... Male side joint, 21 ... First tubular member, 22 ... Contact surface , 23 ... Locking part, 30 ... Female side joint, 31 ... Second tubular member, 32 ... Overhang part, 33 ... Sealing material holding surface, 34 ... O-ring (seal member), 35 ... Hook fixing member, 36 ... First hook 37: Second hook 38: First claw part 39 ... Turning restricting member 40 ... Second claw part 41, 42 ... Contact member 45 ... Handle 50 ... Air pipe for flow 52 ... Injector piping

Claims (5)

A circumferential contact surface having a predetermined curvature formed on an outer surface of one end of the first tubular member; and a circumferentially extending locking portion formed on a base portion of the contact surface. A male joint,
A circumferential sealing material holding surface having a predetermined curvature formed corresponding to the contact surface on the inner surface of one end of the second tubular member, and a circumferential shape held by the sealing material holding surface A first hook having a first claw portion that is provided on a side portion of the second tubular member and is engaged with the engagement portion of the male joint, and the first tubular member. A second hook provided on a side of the second tubular member opposite to the side on which the hook is provided, and having a second claw portion that is locked to the locking portion of the male joint; At least one of the first hook and the second hook includes a handle for bringing the contact surface of the male joint into contact with the sealing material of the female joint and pulling the male joint toward the female joint. A female joint,
A pipe joint comprising:
The pipe joint according to claim 1, wherein the first claw portion of the first hook and the second claw portion of the second hook have a surface contact member that is in surface contact with the locking portion.   The surface contact members provided in the first claw portion of the first hook and the second claw portion of the second hook have a surface shape extending in the circumferential direction corresponding to the shape of the locking portion. The piping joint according to claim 1, wherein   The pipe joint according to claim 1, wherein the surface contact member is made of resin. It is an in-vehicle tank of a bulk vehicle for powder transportation in which bulk powder is loaded and transported inside, and the powder is discharged from the discharge hatch,
4. For powder transportation, wherein the pipe joint according to any one of claims 1 to 3 is used for attaching and detaching at least one of a flow air pipe and an injector pipe connected to the outside of the discharge hatch. On-board tank for bulk vehicles.   A bulk vehicle for transporting powder, comprising the on-vehicle tank according to claim 4.

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