JP5512214B2 - Pipe protection device - Google Patents

Description

  The present invention, for example, when storing a tube or performing shot blasting on the outer surface of the tube, the flange surface of the flange portion provided at the end of the tube, the peripheral edge of the tube, and the tube The present invention relates to a tube protection device that can prevent water and dust from adhering to an inner peripheral surface and can prevent scratches.

  Conventionally, for example, when storing a metal tube with a flange portion or a metal tube without a flange portion before installation, the flange surface, the peripheral edge of the tube, and the inside of the tube In order to prevent water and dust from adhering to the peripheral surface and rusting them, they are protected.

  For example, the flange surface may be protected by sticking an adhesive tape directly or by attaching a veneer plate and fastening the veneer plate to the tube with the adhesive tape. Further, the flange surface may be covered with a vinyl sheet, and the vinyl sheet may be fastened to the pipe with an adhesive tape to protect the flange surface.

  And in order to protect the edge part peripheral part of a pipe | tube, and the internal peripheral surface of a pipe | tube, both ends of a pipe | tube may be coat | covered and sealed with a vinyl sheet. This vinyl sheet is fastened to the tube with, for example, an adhesive tape.

  However, in the method using the adhesive tape, since the adhesive adheres to the flange surface and the pipe, it takes much time and effort to remove the adhesive attached to the pipe. And in the method of using a plywood board or a vinyl sheet, it takes much time and labor to attach or remove them from the flange surface or pipe. And since a plywood board and a vinyl sheet may be damaged or torn, there is little possibility of reusing and it is necessary to process as garbage.

  In addition, when performing shot blasting on the outer surface of the tube, it is conceivable to use a metal plate instead of the above veneer plate so that it can withstand the collision of the particles as the projection material. Even if a metal plate is used, it takes much time and effort to attach and detach the metal plate to and from the flange portion. And it takes much time and time to remove the adhesive that has adhered to the tube.

  Moreover, as an example of what can prevent damage to the pipe end or prevent water and dust from entering the pipe, there is a pipe protector 1 shown in FIG. 7 (see, for example, Patent Document 1). . As shown in FIG. 7, the tube protector 1 includes two rubber caps 2 and one metal cover 3.

  FIG. 7 shows a cross-sectional view of the two pipe end portions 4 to which the pipe protector 1 is attached. The two pipe end portions 4 protrude from the flange surface 5a of the flange portion 5 at a distance from each other.

  When the tube protector 1 is attached to the two tube ends 4, first, the two rubber caps 2 are attached to the two tube ends 4. Next, the metal cover 3 is attached to the two pipe end portions 4 from above the two rubber caps 2. Thereafter, a bolt (not shown) is inserted into the insertion hole 3 a formed in the metal cover 3, and is screwed into an internal screw hole (not shown) formed in the flange portion 5 and tightened.

  In this state, each rubber cap 2 is in intimate contact with each tube end 4, so that foreign matter can be prevented from entering the tube end 4. Since each pipe end 4 is covered with the metal cover 3 from above the rubber cap 2, even if an impact is applied to the metal cover 3, the pipe end 4 is prevented from being damaged. Can do. Moreover, since the metal cover 3 is fastened to the flange portion 5 with bolts, the metal cover 3 is not detached from the tube end portion 4 by an external force.

JP-A-11-201687

  However, in the conventional pipe protector 1 shown in FIG. 7, the metal cover 3 can be fastened to the flange portion 5 with a bolt, but a general pipe is usually provided with a female screw hole for screwing the bolt. Therefore, the metal cover 3 cannot be fixedly attached to the pipe. Further, if a female screw hole for fastening a bolt is provided in the pipe, the pipe will be out of the standard, and such cannot be done.

  Therefore, considering that the rubber cap 2 and the metal cover 3 of the tube protector 1 shown in FIG. 7 are fitted and attached to the tube end 4 without using bolts, the tube end 4 is formed. For example, when an external force is applied to the tube protector 1 while the heat exchanger is being stored, the tube protector 1 may come off from the tube end 4. As described above, when the tube protector 1 is detached from the tube end 4, water or dust may enter the tube end 4 and the inner surface of the tube may rust, or the inner surface of the tube may be damaged. .

  Further, in the case where, for example, shot blasting is performed on the outer surface of the member on which the tube end 4 is formed, the projecting material collides with the tube protector 1 so that the tube protector 1 is 4, and in that case, the end and inner surface of the tube may be damaged by the collision of the propellant.

  The present invention has been made to solve the above-described problems, and can be firmly and detachably attached to the inner peripheral surface of the pipe, and the flange surface of the flange portion provided at the end of the pipe An object of the present invention is to provide a protective device for a pipe which can prevent water and dust from adhering to the peripheral edge part of the pipe and the inner peripheral surface of the pipe, and prevent these parts from being damaged. It is said.

In the tube protection device according to the present invention, a substantially circular first closing member to be inserted into a tube and a substantially circular first pressing member are arranged to face each other with a space therebetween, and the first closing member and the A first mounting ring having elasticity is disposed between the outer peripheral edge portions of the first pressing member, and a first bolt shaft portion provided by being coupled to the first closing member is provided with a lid and elasticity. By inserting the first tightening portion, the first pressing member, and the first mounting ring, and tightening them with a first nut that is screwed into the first bolt shaft portion, the first mounting ring is A protective device for a pipe, which is sandwiched between the first closing member and the first pressing member and is brought into pressure contact with an inner peripheral surface of the pipe, wherein a first protective packing is provided on the plate surface of the lid is further a substantially circular second closure member inserted into the tube, the A second mounting ring having elasticity is disposed between the outer peripheral edges of the first closing member and the second closing member; A second bolt shaft portion coupled to the two closing members is inserted into the lid body, the second tightening portion, the first closing member, and the second mounting ring, and the second mounting ring, By tightening the first closing member and the second tightening portion with a second nut screwed to the second bolt shaft portion, the second mounting ring is connected to the first closing member and the second closing member. The first nut is further tightened in a state in which the first and second mounting rings press the inner peripheral surface of the pipe, and the first nut is further tightened. 1 The tightening part is further compressed and deformed, The serial first protective packing, the edge periphery of the tube, or is characterized in that it has a structure of adhering against the flange surface of the flange portion provided at an end portion of the tube.

When the pipe protection device according to the present invention is attached to the inner peripheral surface of the pipe, the operator firstly has the first closing member, the first attachment ring, the first holding member, the second closing member, and the second attachment. The ring is inserted into the inner hole of the tube, and the first protective packing provided on the lid is pressed against the peripheral edge portion of the tube or the flange surface of the flange portion to bring it into close contact. In this state, the second mounting ring, the first closing member, and the second tightening are interposed between the second nut and the second closing member by tightening the second nut screwed into the second bolt shaft portion. The second mounting ring is compressed between the outer peripheral edge portions of the first closing member and the second closing member, and the second mounting ring is compressed on the inner peripheral surface of the pipe. It can be deformed in the direction of heading and pressed.
Next, in this state, by tightening the first nut screwed into the first bolt shaft portion, a lid, a first tightening portion having elasticity between the first nut and the first closing member, The first pressing member and the first mounting ring can be sandwiched and tightened. At this time, the first mounting ring is compressed between the outer peripheral edge portions of the first closing member and the first pressing member, and the first holding ring is compressed. The mounting ring can be deformed in the direction toward the inner peripheral surface of the pipe and can be pressed. Accordingly, it is possible to cause a frictional resistance between the first mounting ring and the inner peripheral surface of the tube with respect to the movement in the tube axis direction, for example. Removably fixed and can be attached.

In this way, by bringing both the first and second mounting rings into pressure contact with the inner peripheral surface of the pipe, the first and second mounting rings have an inner circumference of the pipe with respect to movement in the pipe axial direction. A frictional resistance can be applied between the pipe and the pipe protection device. The pipe protection device can be detachably and firmly fixed to the inner peripheral surface of the pipe. As a result, by further tightening the first nut in this state, the first tightening portion is further compressed and deformed, and the lid presses the first protective packing against the peripheral edge portion of the pipe or the flange surface. As the pipe protector attached to the pipe does not shift in the axial direction of the pipe, the lid strongly presses the first protective packing against the peripheral edge of the pipe or the flange surface. And the close contact portion can be sealed.

  In the tube protecting apparatus according to the present invention, the lid body is provided on a disc-shaped lid body portion and an outer peripheral edge portion of the lid body portion, and protrudes in a substantially vertical direction with respect to the plate surface of the lid body portion. A substantially cylindrical annular convex portion, and the plate surface of the lid main body portion is provided with the first protective packing, and the inner peripheral surface of the annular convex portion has an outer peripheral surface of an end portion of the tube, Or the 2nd protective packing which is mounted | worn and closely_contact | adhered to the outer peripheral surface of the flange part provided in the edge part of a pipe | tube can be provided.

  In this way, with the tube protection device fixed and attached to the inner peripheral surface of the tube, the lid body presses the first protective packing against the peripheral edge portion of the tube or the flange surface to bring it into close contact. be able to. In this state, the second protective packing provided on the inner peripheral surface of the annular convex portion is brought into close contact with the outer peripheral surface of the end portion of the tube or the outer peripheral surface of the flange portion provided at the end portion of the tube. be able to.

In the tube protecting apparatus according to the present invention, the second protective packing may be formed of a single foam sponge.

Thus, by forming the second protective packing with a single foam sponge, the operator can connect the annular convex portion of the lid body provided with the second protective packing on the inner peripheral surface to the outer peripheral surface of the end portion of the tube. Alternatively, the second protective packing can be formed so that the second protective packing is flexibly deformed by a necessary amount when mounted on the outer peripheral surface of the flange portion provided at the end of the pipe. Therefore, the operator can easily attach the annular convex portion of the lid to the outer peripheral surface of the end portion of the pipe or the outer peripheral surface of the flange portion. In addition, in a state in which this pipe protection device is attached to the inner peripheral surface of the pipe, the second protective packing should not have a gap with an appropriate contact pressure on the outer peripheral surface of the end portion of the pipe or the outer peripheral surface of the flange portion. Since it can be made to adhere, it can prevent water, dust, a projection material, etc. permeating into the pipe from the outer peripheral surface of the end part of the pipe or the outer peripheral surface of the flange part and the contact surface with the second protective packing.

  In the pipe protection device according to the present invention, the first closing member includes a first mounting ring closing member and a second mounting ring pressing member that are coupled to each other, and the first mounting ring closing member includes: The first mounting ring is disposed so as to be sandwiched between the first pressing member, and the second mounting ring retaining member is disposed so as to sandwich the second mounting ring between the second closing member and the first retaining ring. Can be.

  In this case, the first mounting ring that is sandwiched between the first mounting ring closing member and the first pressing member and is deformed in the direction toward the inner peripheral surface of the pipe, and the second mounting ring pressing member The second mounting ring sandwiched between the second closing member and deformed in the direction toward the inner peripheral surface of the pipe can be disposed in a state of being relatively separated by a predetermined distance. Accordingly, the first and second mounting rings that are deformed can abut against each other so that the deformation is not prevented, and the first and second mounting rings are directed toward the inner peripheral surface of the pipe. It can be deformed in an appropriate direction and pressed. As a result, the tube protection device can be attached to the tube with appropriate strength.

  In the tube protection device according to the present invention, the first tightening portion may be formed of a substantially short cylindrical rubber-like elastic body or a spring.

  As described above, when the first tightening portion is a rubber-like elastic body having a substantially short cylindrical shape, the first presser member and the lid through which the first bolt shaft portion is inserted into both ends of the first tightening portion. Each insertion hole can be sealed by being in close contact with the inner peripheral edge of each insertion hole of the body, and external water, dust, projection material, etc. enter the inner hole of the tube from the insertion hole of the lid Can be prevented. As a result, it is possible to prevent the inner surface and flange surface of the pipe from being rusted and dirty and from being damaged.

  When the first tightening portion is a spring, the first and second mounting rings press-contact the inner peripheral surface of the tube with an appropriate force, and the first protective packing is connected to the peripheral edge portion of the tube or the flange surface. It is possible to accurately set the elastic coefficient of the first tightening portion so as to be in close contact with an appropriate force.

  In the tube protection device according to the present invention, the first protective packing may be formed of a rubber layer.

  Thus, by forming the first protective packing with the rubber layer, it is possible to make close contact with the end edge peripheral portion of the tube so that there is no gap, and the end peripheral portion of the tube can be sealed. Therefore, it is possible to prevent water, dust, a projection material, and the like from entering the inner hole of the pipe from the outside. And the first protective packing can be formed so as to closely contact the flange surface of the flange portion provided at the end portion of the pipe so that there is no gap, water, dust adheres to this flange surface, It is possible to prevent the projection material from colliding.

  In the tube protection device according to the present invention, the outer surface of the lid may be covered with a rubber layer.

  If it does in this way, when performing a shot blasting process, for example with respect to the pipe | tube with which the protection apparatus for pipes is attached, it can prevent that a projection material collides directly with the outer surface of a cover body. Thereby, damage to the lid can be prevented, and the protection function for the tube by the lid can be prevented from being impaired.

  The tube protection device according to the present invention is a state in which the tube protection device is detachably fixed and attached to the inner peripheral surface of the tube, and the lid body attaches the first protective packing to the edge peripheral portion of the tube or the tube. It is the structure which can be pressed and adhered to the flange surface of the flange part provided in. Therefore, for example, when the pipe is stored, the first protective packing can prevent water and dust from adhering to the peripheral edge portion of the pipe or the flange surface. Since the lid presses the first protective packing against the peripheral edge of the pipe or the flange surface, the lid is brought into intimate contact, so that the external opening from the pipe to which the pipe protection device is attached is connected to the external hole. Water and dust can be prevented from entering. Thereby, it is possible to prevent the peripheral edge portion of the tube or the flange surface and the inner peripheral surface of the tube from being rusted and dirty, and to protect the surfaces from being scratched.

  Then, since the pipe protective device is attached to the pipe by pressing the elastic first mounting ring against the inner peripheral surface of the pipe, the pipe protective device is attached to the pipe without damaging the inner surface of the pipe. It can be attached detachably.

  In addition, the pipe protection device can be removably attached to the pipe in a short time by performing an extremely simple operation in which an operator tightens or loosens the first nut.

  Furthermore, since the first mounting ring is configured to attach the tube protection device to the inner peripheral surface of the tube by being pressed against the inner peripheral surface of the tube, even when the tubes are arranged close to each other, This protective device for a tube can be attached to the desired tube without being obstructed by the tube arranged next to it.

  Further, by providing an annular convex portion on the lid and a second protective packing provided on the inner peripheral surface of the annular convex portion, for example, shot blasting (sand blasting) with respect to a pipe to which the protective device for pipe is attached. ) When the treatment is performed, the second protective packing prevents the particles as the projection material from colliding with the outer peripheral surface of the end portion of the tube or the outer peripheral surface of the flange portion provided at the end portion of the tube. it can. Thereby, the outer peripheral surface of the end portion of the tube or the outer peripheral surface of the flange portion is arranged on the back side, and the end peripheral portion of the tube or the flange surface to which the first protective packing is in close contact is the projection material. It is possible to reliably prevent scratches due to collisions.

  In this way, the purpose of preventing damage to the peripheral edge of the pipe is to ensure the prescribed welding quality when, for example, the peripheral edge of the pipe is formed in a groove shape for welding. It is to do. The purpose of preventing the flange surface from being damaged is to ensure the sealing performance of the joint surfaces of the flange portions connected to each other.

It is a longitudinal cross-sectional view which shows the 1st and 2nd protection apparatus for pipes which concerns on the 1st and 2nd reference technical example for demonstrating this invention . It is a front view which shows the protection apparatus for 1st pipe | tubes based on the said 1st reference technical example . It is a longitudinal section showing the protection device for the 3rd and 4th pipe concerning the 3rd and 4th reference technical examples for explaining the invention . It is BB sectional drawing which shows the protection apparatus for 5th pipe | tubes based on 1st Embodiment of the same invention. It is AA sectional drawing which shows the protection apparatus for 5th pipe | tubes based on the 1st Embodiment . It is sectional drawing which looked at the protection apparatus for 6th pipes concerning 2nd Embodiment of the invention from the same direction as FIG. It is sectional drawing which shows the conventional protector for pipes.

Hereinafter, first and second reference technical examples for explaining a pipe protection device according to the present invention will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the first pipe protection device 11 of the first reference technical example can be attached to the right end portion of the pipe 7 where the flange portion 8 is provided, and the second pipe protection device of the second reference technical example . The device 12 can be attached to the left end of the tube 7 where the flange portion 8 is not provided. For example, when the first and second tube protection devices 11 and 12 are stored in a state before the tube 7 is installed, the flange surface 8a, the edge peripheral portion 7a of the tube 7 and the inner periphery of the tube 7 are stored. These can be protected so that water and dust do not adhere to the surface 7b and they rust or become dirty. FIG. 2 is a front view showing the first pipe protection device 11.

  As shown in FIG. 1, the first tube protection device 11 can be attached to, for example, the left end portion of the tube 7 having an inner diameter of about 100 mm, and the second tube protection device 12 has a flange portion having an outer diameter of about 200 mm. Although it is formed so that it can be attached to 8, it can also be attached to a pipe or a flange portion close to this size. Further, the first and second tube protection devices 11 and 12 are formed according to the size of the tube 7 and the flange portion 8 so that they can be attached to the tube and the flange portion of such a size. be able to.

  Furthermore, the first and second pipe protection devices 11 and 12 can be used by being attached to the pipe 7 before being installed, for example. However, for other existing pipes, for example, at the time of repair work. It can also be installed and used. The tube 7 and the flange portion 8 may be made of metal or synthetic resin.

  The tube 7 shown in FIG. 1 is formed in a cylindrical shape, and a disc-shaped flange portion 8 is welded to the right end portion thereof.

  Next, first, the first pipe protection device 11 will be described with reference to FIG. The first pipe protection device 11 includes a first closing member 14 and a first pressing member 15 for pressing the first attachment ring 13 against the inner peripheral surface 7 b of the pipe 7.

  As shown in the figure, the first closing member 14 and the first presser member 15 are formed so that their cross-sectional shapes are substantially symmetrical and size, and have a disc shape having a predetermined thickness. It is a body and is arranged to face each other with a space therebetween.

  A resilient first attachment ring 13 is disposed between the outer peripheral edge portions of the first closing member 14 and the first pressing member 15. The ring holding surface 16 holds the first mounting ring 13.

  The ring holding surface 16 of the first closing member 14 is formed in an annular shape, and as shown in the cross-sectional view of FIG. 1, a vertical surface 16a extending in the radial direction of the first closing member 14 and an inner surface of the vertical surface 16a. And an inclined surface 16b continuously connected to the periphery. The inclined surface 16b is formed so as to move away from the first pressing member 15 disposed to face the first closing member 14 from the center side of the first closing member 14 toward the radially outer side. Yes.

  Similarly, the ring holding surface 16 of the first pressing member 15 is formed in an annular shape, and as shown in the sectional view of FIG. 1, a vertical surface 16a extending in the radial direction of the first pressing member 15 and the vertical surface The inclined surface 16b connected continuously with the inner periphery of 16a is provided. The inclined surface 16b is formed so as to move away from the first closing member 14 disposed so as to face the first pressing member 15 from the center side of the first pressing member 15 toward the outer side in the radial direction. Yes.

  The first mounting ring 13 is a rubber-like elastic body such as a synthetic rubber, and is formed in an annular shape. The first mounting ring 13 has a C-shaped cross section as shown in FIG. An approximately U-shaped annular groove is formed, and the outer peripheral surface is formed in a substantially arc shape that bulges outward. And each cross-sectional shape of the left side surface and the right side surface of the first mounting ring 13 shown in FIG. 1 has a vertical surface 16a constituting the ring holding surface 16 of each of the first closing member 14 and the first pressing member 15, and The shape corresponds to the inclined surface 16b and bulges outward.

  Moreover, as shown in FIG. 1, the front-end | tip part of the 1st bolt axial part 17 is inserted in the insertion hole formed in the center of the 1st closing member 14, and it welds to the 1st closing member 14 in this state Have been joined at the weld.

  As shown in FIG. 1, the first bolt shaft portion 17 is a rod-like body formed in a predetermined length and thickness. The first bolt shaft portion 17 has an insertion hole formed at the center of the first pressing member 15 and a first tightening portion 18 in order from the distal end (left end portion) side to the proximal end (right end portion) side. Are inserted through the inner hole, the insertion hole formed at the center of the lid 19, and the inner hole of the washer 20. Further, a male screw portion 17a is formed at the base end portion, and the first nut 21 is screwed into the male screw portion 17a. The first nut 21 is provided with a handle 22.

  The first pressing member 15, the first tightening portion 18, the lid body 19, and the washer 20 shown in FIG. 1 are inserted through the first bolt shaft portion 17 so as to be movable in the axial direction. Then, both end portions of the first tightening portion 18 are in close contact with and in contact with the plate surfaces of the first pressing member 15 and the lid body 19. And the insertion hole formed in each of the 1st pressing member 15 and the cover body 19 is arrange | positioned inside the 1st fastening part 18. As shown in FIG. Further, the end portion of the first nut 21 is in contact with the plate surface of the outer surface of the lid body 19 via the washer 20.

  The first tightening portion 18 has a substantially short cylindrical shape, and is formed of a rubber-like elastic body such as synthetic rubber.

  As shown in FIGS. 1 and 2, the lid 19 is provided with a first protection provided on the lid 19 against the flange surface 8 a of the flange 8 provided on the right opening end of the tube 7. The packing 23 can be pressed and brought into close contact.

  The lid body 19 is, for example, a metal disk, and the outer diameter thereof substantially coincides with the outer diameter of the disk-shaped flange portion 8.

  As shown in FIG. 1, the first protective packing 23 is for closely contacting the flange surface 8 a of the flange portion 8 to protect the flange surface 8 a, and is a plate on the side of the lid body 19 facing the flange portion 8. It is formed by a rubber sheet affixed to the surface (inner surface). Therefore, the 1st protection packing 23 is formed in the magnitude | size and shape which can contact | adhere and cover the flange surface 8a which it is going to protect. In other words, the first protective packing 23 is an annular plate-like body, and the outer diameter thereof substantially coincides with the outer diameters of the disc-like lid body 19 and the flange portion 8. The inner diameter of the first protective packing 23 is slightly larger than the inner diameter of the flange portion 8.

  The first protective packing 23 is formed as a rubber layer by sticking a rubber sheet formed of a rubber-like elastic body to the inner surface of the lid 19. However, the first protective packing 23 is formed on the inner surface of the lid 19 by other methods. The first protective packing 23 may be formed. The first protective packing 23 may be formed such that its inner diameter matches the inner diameter of the flange portion 8.

  Next, the second pipe protection device 12 will be described with reference to FIG. The difference between the second pipe protection device 12 and the first pipe protection device 11 is that in the first pipe protection device 11, the first protective packing 23 provided on the lid 19 is brought into close contact with the flange surface 8 a. In addition to protecting the flange surface 8a, water and dust are prevented from entering the inner hole 7c from the outside of the pipe 7 from the close contact portion between the first protective packing 23 and the flange surface 8a. In the two-tube protection device 12, the first protective packing 26 provided on the lid body 25 is brought into close contact with the end peripheral portion 7 a of the pipe 7 to protect the end peripheral portion 7 a and the first protective packing 26. In this configuration, water and dust do not enter the inner hole 7c from the outside of the tube 7 from the close contact portion between the peripheral edge portion 7a and the end edge peripheral portion 7a.

  Therefore, the first protective packing 26 of the second pipe protection device 12 is formed in a size and shape that can be in close contact with and cover the edge peripheral portion 7a of the pipe 7 to be protected. That is, the first protective packing 26 is an annular plate-shaped body, and has a certain margin so that the end edge peripheral portion 7a of the tube 7 abuts between the outer peripheral edge portion and the inner peripheral edge portion. The outer diameter and inner diameter are set. Further, the outer diameter of the first protective packing 26 is substantially the same as the outer diameter of the disc-like lid body 25.

  Except for this, the configuration is the same as that of the first tube protection device 11 and operates in the same manner. Therefore, the equivalent parts are denoted by the same reference numerals and the description thereof is omitted.

  Next, the operation and method of use of the first and second tube protection devices 11 and 12 configured as described above will be described with reference to FIG. For example, when the first and second pipe protection devices 11 and 12 are stored in a state before the pipe 7 is installed, they are attached to both ends of the pipe 7 as shown in FIG. These can be protected so that water or dust does not adhere to the surface 8a, the edge peripheral portion 7a of the tube 7 and the inner peripheral surface 7b of the tube 7 and they rust or become dirty.

  Next, with reference to FIG. 1, the procedure and operation of attaching the first and second tube protection devices 11 and 12 to the right and left ends of the tube 7 will be described. Note that the first and second tube protection devices 11 and 12 may be attached to the tube 7 in any order. Will be described in the order in which the second pipe protection device 12 is attached to the left end of the pipe 7.

  First, as shown in FIG. 1, the operator places the first closing member 14, the first attachment ring 13, and the first pressing member 15 of the first pipe protection device 11 from the right end portion of the pipe 7 into the inner hole 7 c thereof. The first protective packing 23 provided on the lid 19 is pressed against the flange surface 8a of the flange portion 8 to be brought into close contact therewith. In this state, the first nut 21 that is screwed into the first bolt shaft portion 17 is tightened. Thus, the lid 19, the elastic first tightening portion 18, the first pressing member 15, and the first mounting ring 13 are sandwiched and tightened between the first nut 21 and the first closing member 14. At this time, the first mounting ring 13 is compressed between the outer peripheral edge portions (ring holding surfaces 16) of the first closing member 14 and the first pressing member 15, and the first mounting ring 13 is connected to the pipe 7 It can be deformed in the direction toward the inner peripheral surface 7b and press-contacted.

  As a result, the first attachment ring 13 can be caused to have a frictional resistance between the inner peripheral surface 7b of the tube 7 with respect to movement in the tube axis direction, for example. The tube 7 can be detachably fixed and attached to the inner peripheral surface 7b.

  That is, when the first nut 21 shown in FIG. 1 is tightened, first of the first mounting ring 13 and the first tightening portion 18, the first mounting ring 13 is first greatly compressed, and the inner peripheral surface 7 b of the pipe 7. The elastic modulus in the direction in which each of the first attachment ring 13 and the first tightening portion 18 is compressed is set so as to be deformed in the direction toward the front. That is, the first mounting ring 13 is set to have a smaller elastic coefficient in the direction in which it is compressed than the first tightening portion 18.

  Next, in a state where the first attachment ring 13 presses the inner peripheral surface 7 b of the pipe 7 and the first pipe protection device 11 is fixedly attached to the inner peripheral surface 7 b of the pipe 7, the first nut 21. By further tightening, the first tightening portion 18 is further compressed and deformed as shown by a two-dot chain line in FIG. 1, and as a result, the lid body 19 presses the first protective packing 23 against the flange surface 8a and comes into close contact. The annular close contact portion can be sealed.

  In this way, the first tightening portion 18 is further compressed and deformed by further tightening the first nut 21 in a state where the first mounting ring 13 is in pressure contact with the inner peripheral surface 7b of the tube 7, and the lid body The first mounting ring 13 that presses the inner peripheral surface 7b of the pipe 7 when the first nut 21 is further tightened can press the first protective packing 23 against the flange surface 8a. This is because it is hardly compressed any more.

  Therefore, as shown in FIG. 1, when the first pipe protection device 11 is attached to the pipe 7 and stored, the first protective packing 23 can prevent water and dust from adhering to the flange surface 8a. Since the lid 19 presses the first protective packing 23 against the flange surface 8a, the lid 19 closes the lid 19 to the inner hole 7c from the opening on the right side of the pipe 7 to which the first pipe protection device 11 is attached. It is possible to prevent external water and dust from entering. As a result, the flange surface 8a and the inner peripheral surface 7b of the tube 7 can be prevented from being rusted or soiled, and can be protected from being scratched.

  As shown in FIG. 1, the first pipe protection device 11 is attached to the pipe 7 by pressing the elastic first attachment ring 13 against the inner peripheral surface 7 b of the pipe 7. The first tube protection device 11 can be detachably attached to the tube 7 without scratching the inner surface of the tube.

  In addition, the first pipe protection device 11 can be detachably and repeatedly attached to the pipe 7 in a short time by an extremely simple operation in which an operator tightens or loosens the first nut 21.

  Further, as shown in FIG. 1, the first attachment ring 13 is configured to attach the first tube protection device 11 to the inner peripheral surface 7 b of the tube 7 by being pressed against the inner peripheral surface 7 b of the tube 7. Even when the tubes 7 are arranged close to each other, the first tube protection device 11 can be attached to the desired tube 7 without being obstructed by the adjacent tube 7. Moreover, the 1st pipe | tube protection apparatus 11 can be attached also to all the pipes 7 arrange | positioned mutually close.

  Since the first tightening portion 18 shown in FIG. 1 is formed of a substantially short cylindrical rubber-like elastic body, both ends of the first tightening portion 18 are connected to the first bolt shaft portion 17. The first presser member 15 into which the first insertion member is inserted and the inner peripheral edge portion of each insertion hole of the lid body 19 can be in close contact with each other to seal each insertion hole. Can be prevented from entering the inner hole 7 c of the tube 7. As a result, the inner surface of the tube 7 and the flange surface 8a can be prevented from being rusted or soiled and scratched.

  That is, the space 27 surrounded by the first closing member 14 shown in FIG. 1, the first pressing member 15, and the first mounting ring 13 that press-contacts the inner peripheral surface 7 b of the pipe 7 is formed in the first pressing member 15. The tube 7 communicates with the outside of the tube 7 through the formed insertion hole, the inner hole of the first tightening portion 18, and the insertion hole formed in the lid body 19. It has become the composition which is not connected. Therefore, the inner hole 7 c of the tube 7 is sealed by the first tube protection device 11 and does not communicate with the outer space of the tube 7.

And in this reference technical example , although the 1st tightening part 18 was formed with rubber-like elasticity, it may replace with this and may form with a compression coil spring. In this way, the first fastening ring 13 presses the inner peripheral surface 7b of the pipe 7 with an appropriate force, and the first protective packing 23 is in close contact with the flange surface 8a with an appropriate force. The elastic coefficient of the recessed portion 18 can be set accurately.

  Moreover, since the 1st protection packing 23 shown in FIG. 1 is formed with the rubber layer, it can closely_contact | adhere so that a clearance gap may not be made to the flange surface 8a, and can seal this flange surface 8a. Therefore, it is possible to prevent water and dust from adhering to the flange surface 8a, and it is possible to prevent water, dust, and in some cases, a projection material or the like from entering the inner hole 7c of the tube 7 from the outside.

  Next, the procedure and operation of attaching the second pipe protection device 12 shown in FIG. 1 to the left end of the pipe 7 will be described. The procedure and action of attaching the second pipe protection device 12 to the left end portion of the pipe 7 are different from the procedure and action of attaching the first pipe protection device 11 to the right end portion where the flange portion 8 of the pipe 7 is provided. In the first pipe protection device 11, by tightening the first nut 21, the first tightening portion 18 is compressed and deformed, and the lid 19 presses the first protective packing 23 against the flange surface 8 a so as to be in close contact with each other. While the annular close contact portion is sealed, in the second pipe protection device 12, the first tightening portion 18 is compressed and deformed by tightening the first nut 21, and the lid body 25 is The first protective packing 26 is pressed against the peripheral edge portion 7a of the tube 7 to be in close contact therewith, and the annular close contact portion is sealed.

  According to the second pipe protection device 12, for example, when the pipe 7 is stored, the first protective packing 26 can prevent water and dust from adhering to the edge peripheral portion 7a of the pipe 7. . And since the cover body 25 is pressing the 1st protection packing 26 against the edge peripheral part 7a of the pipe | tube 7, it is closely attached, From the opening part of the left side of the pipe | tube 7 to which this 2nd pipe | tube protection apparatus 12 is attached. It is possible to prevent external water and dust from entering the inner hole 7c. As a result, it is possible to prevent the edge peripheral portion 7a of the tube 7 and the inner peripheral surface 7b of the tube 7 from being rusted or dirty, and to protect the surfaces from being scratched.

  Except for this, the procedure and action for attaching the first tube protection device 11 to the right end of the tube 7 are the same, and the description thereof will be omitted.

Next, with reference to FIG. 3, the 3rd reference technical example of the protection apparatus for pipes which concerns on this invention is demonstrated. The third pipe protection device 29 of the third reference technical example shown in FIG. 3 is different from the first pipe protection device 11 of the first reference technical example shown in FIG. 1 in that the first pipe protection device shown in FIG. In the apparatus 11, the first protective packing 23 provided on the lid 19 is in close contact with the flange surface 8a to protect the flange surface 8a. In the tube protection device 29, the first protective packing 23 provided on the lid body 19 is brought into close contact with the flange surface 8 a to protect the flange surface 8 a and the second protective packing 31 provided on the lid body 19. Is different from that of the flange portion 8 in that the outer peripheral surface 8b can be protected by closely contacting the outer peripheral surface 8b.

  In the first tube protection device 11 shown in FIG. 1, the outer surface of the lid 19 is exposed, whereas in the third tube protection device 29 shown in FIG. 3, the outer surface of the lid 19 is made of rubber. The roller coated with layer 32 is also different.

  Except for this, the configuration is the same as that of the first tube protection device 11 and operates in the same manner. Therefore, the equivalent parts are denoted by the same reference numerals and the description thereof is omitted.

  As shown in FIG. 3, the lid 33 of the third tube protection device 29 is provided on a disc-like lid body 33a and an outer peripheral edge of the lid body 33a. And an annular convex portion 33b having a substantially short cylindrical shape protruding in a direction substantially perpendicular to the surface.

  The first protective packing 23 is provided on the inner surface of the plate surface of the lid main body portion 33a, and the outer peripheral surface of the flange portion 8 provided at the end of the tube 7 is provided on the inner peripheral surface of the annular convex portion 33b. A second protective packing 31 is provided which is attached to and closely attached to 8b.

  As shown in FIG. 3, the second protective packing 31 has an outer diameter larger than the outer diameter of the flange portion 8 and an inner diameter smaller than the outer diameter of the flange portion 8.

  Further, as shown in FIG. 3, for example, a rubber sheet is attached to the outer surface of the plate surface of the lid main body portion 33a and the outer peripheral surface of the annular convex portion 33b, and this rubber sheet forms the rubber layer 32. ing. The rubber layer 32 is formed by attaching a rubber sheet to the outer surface and the outer peripheral surface of the lid 33. However, the rubber layer 32 may be formed by other methods.

  According to the third tube protection device 29, as shown in FIG. 3, the lid main body portion 33a is attached to the inner peripheral surface 7b of the right end portion of the tube 7 in the state where the third tube protection device 29 is fixedly attached. 1 The protective packing 23 can be brought into close contact with the flange surface 8a. In this state, the second protective packing 31 provided on the inner peripheral surface of the annular convex portion 33 b can be brought into close contact with the outer peripheral surface 8 b of the flange portion 8.

  In this way, by providing the lid 19 with the annular convex portion 33b and the second protective packing 31 on the inner peripheral surface of the annular convex portion 33b, for example, the third pipe protecting device 29 (and later). When a shot blasting (sand blasting) process is performed on the pipe 7 to which the fourth pipe protection device 30 is attached, it is second that the particles as the projection material collide with the outer peripheral surface 8b of the flange portion 8. This can be prevented by the protective packing 31. Thereby, it can arrange | position to the back | inner side rather than the outer peripheral surface 8b of the flange part 8, and it can prevent reliably that the flange surface 8a to which the 1st protective packing 23 is closely_contact | adhered is damaged by the collision of a projection material.

  Thus, the purpose of preventing the flange surface 8a from being damaged is to ensure the sealing performance of the joint surfaces of the flange portions 8 connected to each other.

  As shown in FIG. 3, since the rubber layer 32 is provided on the outer surface of the plate surface of the lid main body portion 33a and the outer peripheral surface of the annular convex portion 33b, for example, a third tube protection device 29 is attached. The rubber layer 32 can prevent the projection material from directly colliding with the outer surface and the outer peripheral surface of the lid 33 when the shot blasting process is performed on the pipe 7. As a result, the lid 33 can be prevented from being damaged, and the protective function of the lid 33 against the tube 7 can be prevented from being impaired.

  The purpose of performing the shot blasting process on the outer surfaces of the tube 7 and the flange portion 8 is, for example, the surface treatment of the tube 7, dirt removal, deburring, and the like.

Next, with reference to FIG. 3 , the 4th reference technical example for demonstrating the protection apparatus for pipes which concerns on this invention is demonstrated. A fourth tube protection device 30 of the fourth reference example technique shown in Figure 3, a second where the second tube protection device 12 of the reference technique example differs shown in Figure 1, protective second tube shown in FIG. 1 In the apparatus 12, the first protective packing 26 provided on the lid body 25 is brought into close contact with the end peripheral portion 7a of the pipe 7, and water and dust can be prevented from entering from the annular close contact portion. On the other hand, in the fourth pipe protection device 30 shown in FIG. 3, the first protective packing 26 provided on the lid 35 is brought into close contact with the edge peripheral portion 7a, and water or dust is discharged from the annular close contact portion. The second protective packing 31 provided on the lid 35 is brought into close contact with the outer peripheral surface 7d at the end of the tube 7 so that the outer peripheral surface 7d can also be protected. However, it is different.

  As shown in FIG. 3, the second protective packing 31 has an outer diameter larger than the outer diameter of the tube end portion and an inner diameter smaller than the outer diameter of the tube end portion.

  According to the fourth pipe protection device 30, as shown in FIG. 3, the lid main body portion 35 a is attached to the inner peripheral surface 7 b of the left end portion of the pipe 7, as shown in FIG. 1 The protective packing 26 can be pressed against the end edge peripheral portion 7a of the tube 7 to be brought into close contact therewith. In this state, the second protective packing 31 provided on the inner peripheral surface of the annular convex portion 35 b can be brought into close contact with the outer peripheral surface 7 d of the end portion of the tube 7.

  In this way, by providing the cover 35 with the annular protrusion 35b and the second protective packing 31 on the inner peripheral surface of the annular protrusion 35b, for example, the fourth pipe protection device 30 (and the first). When the shot blasting (sand blasting) process is performed on the pipe 7 to which the three-tube protection device 29) is attached, the particles as the projecting material collide with the outer peripheral surface 7d at the end of the pipe 7. 2 This can be prevented by the protective packing 31. As a result, the peripheral edge portion 7a of the tube 7 that is disposed on the inner side of the outer peripheral surface 7d of the end portion of the tube 7 and is in close contact with the first protective packing 26 is damaged by the collision of the projection material. Can be surely prevented.

  As described above, the purpose of preventing the edge 7a of the tube 7 from being damaged is that, for example, the edge 7a of the tube 7 has a groove shape for welding (for example, a V-shaped groove or an X-shaped groove). This is to ensure the prescribed welding quality in the case of (1).

  Moreover, each 2nd protection packing 31 and 31 provided in the protection apparatus 29 and 30 for 3rd and 4th pipes shown in FIG. 3 is formed with the single foam sponge, for example. Thus, by forming the second protective packings 31 and 31 with a single foam sponge, the operator can form the annular convex portions of the lid bodies 33 and 35 provided with the second protective packings 31 and 31 on the inner peripheral surface. When attaching 33b, 35b to the outer peripheral surface 8b of the flange 8 provided at the end of the tube 7 or the outer peripheral surface 7d of the end of the tube 7, the required amount of the second protective packings 31, 31 is required. The second protective packings 31 and 31 can be formed so as to be deformed flexibly only. Therefore, the operator can easily attach the annular convex portions 33 b and 35 b of the lid bodies 33 and 35 to the outer peripheral surface 8 b of the flange portion 8 or the outer peripheral surface 7 d of the end portion of the tube 7.

  In addition, in a state where the third and fourth pipe protection devices 29 and 30 are attached to the inner peripheral surface 7b of the pipe 7, the second protective packings 31 and 31 are connected to the outer peripheral surface 8b of the flange portion 8 or the pipe 7. Since it can be adhered to the outer peripheral surface 7d of the end portion so that no gap is formed with an appropriate contact pressure, the outer peripheral surface 7d of the end portion of the tube 7 or the outer peripheral surface 8b of the flange portion 8, the second protective packing 31, It is possible to reliably prevent water, dust, a projection material, and the like from entering the pipe 7 from the contact surface with 31.

Next, with reference to FIG.4 and FIG.5, 1st Embodiment of the protection apparatus for pipes which concerns on this invention is described. The fifth pipe protection device 38 of the first embodiment shown in FIGS. 4 and 5 is different from the third pipe protection device 29 of the third reference technical example shown in FIG. 3 as follows.

  In the third pipe protection device 29 shown in FIG. 3, the first protective packing 23 provided on the lid 33 is removed by tightening one first nut 21 screwed into one first bolt shaft portion 17. The flange surface 8a is closely attached to protect the flange surface 8a, and the second protective packing 31 provided on the lid 33 is closely attached to the outer peripheral surface 8b of the flange portion 8 to protect the outer peripheral surface 8b. It has a configuration that can.

  On the other hand, in the fifth pipe protection device 38 shown in FIGS. 4 and 5, the lid body 33 is formed by tightening the three first nuts 21 screwed into the three first bolt shaft portions 17. The first protective packing 23 provided on the cover 33 is brought into close contact with the flange surface 8a to protect the flange surface 8a, and the second protective packing 31 provided on the lid 33 is attached to the outer peripheral surface 8b of the flange portion 8. The difference is that the outer peripheral surface 8b can be protected by close contact.

  As shown in the AA cross-sectional view of FIG. 5, the three first bolt shaft portions 17 are spaced from the first pressing member 15 by 120 ° along the circumference of a predetermined radius from the center thereof. Is arranged. Each of the three first bolt shaft portions 17 shown in FIGS. 4 and 5 is equivalent to the first bolt shaft portion 17 shown in FIG. 3, and similarly, as shown in FIG. With the body 33, the first tightening portion 18, the first pressing member 15, and the first attachment ring 13 inserted, the tip portion is welded to the first attachment ring closing member 39 of the first closing member 14. Are connected.

  Further, in the fifth pipe protecting device 38 shown in FIGS. 4 and 5, the third second nuts 43 screwed into the male screw portions 42 a of the three second bolt shaft portions 42 are tightened to tighten the second nuts 43. The second mounting ring 44 provided in the five-tube protection device 38 can be brought into pressure contact with the inner peripheral surface 7b of the pipe 7, and the two first and second mounting rings 13, 44 are used to Another difference is that the five-tube protection device 38 can be attached to the inner peripheral surface 7b of the tube 7 in a detachable and powerful manner.

  As shown in the AA cross-sectional view of FIG. 5, the three second bolt shaft portions 42 are spaced from the first pressing member 15 by 120 ° along the circumference of a predetermined radius from the center thereof. Are arranged along the circumferential direction alternately with the three first bolt shaft portions 17.

  Each of the three second bolt shaft portions 42 shown in FIGS. 4 and 5 is formed to be slightly longer than the first bolt shaft portion 17, and the tip end portion thereof is welded to the second closing member 45 and joined. doing.

  The second closing member 45 shown in FIG. 4 is a disk-like member inserted into the tube 7 and is opposed to the second mounting ring pressing member 40 of the first closing member 14 with a space therebetween. The second mounting ring 44 having elasticity is disposed between the outer peripheral edge portions of the second mounting ring pressing member 40 and the second closing member 45, which are disposed on the inner side of the tube 7.

  As shown in FIG. 4, each of the three second bolt shaft portions 42 includes a lid body 33, a first pressing member 15, a second mounting ring 44, a first closing member 14 (a first mounting ring closing member). 39 and the second attachment ring pressing member 40). Each second bolt shaft portion 42 is inserted through a cylindrical second tightening portion 46 formed of a rigid body. The second tightening portion 46 has one end abutting against the plate surface of the first mounting ring closing member 39 and the other end being an end of the second nut 43 screwed into the second bolt shaft portion 42. It abuts via a washer 47.

  When the second nut 43 shown in FIG. 4 is rotated, the second tightening portion 46, the first closing member 14, and the second mounting ring 44 can be tightened, whereby the second mounting ring 44 is moved to the first mounting ring 44. It is configured to be sandwiched between the closing member 14 and the second closing member 45 so as to be brought into pressure contact with the inner peripheral surface 7 b of the pipe 7.

  Further, according to the fifth pipe protection device 38 shown in FIG. 4, the three first nuts 21 are further tightened in a state in which the first and second mounting rings 13 and 44 press the inner peripheral surface 7b of the pipe 7. Thus, each of the three first tightening portions 18 can be further compressed and deformed as indicated by a two-dot chain line, whereby the lid 33 is provided with the first protective packing 23 at the end of the tube 7. It is the structure which can be made to press on the flange surface 8a of the flange part 8 currently attached, and to contact | adhere.

  Next, the first closing member 14 shown in FIG. 4 will be described. The first closing member 14 includes a first mounting ring closing member 39 and a second mounting ring pressing member 40, which are coupled to each other via a short cylindrical connecting portion 41.

  The first attachment ring closing member 39 is a disk-like member, and the ring holding surface 16 is formed on the outer peripheral portion. The first attachment ring closing member 39 is between the ring holding surface 16 formed on the first pressing member 15. It arrange | positions so that the ring 13 may be inserted | pinched. In each ring holding surface 16 formed on the outer periphery of the first pressing member 15 and the first attachment ring closing member 39, a vertical surface 16a, an inclined surface 16b, and a horizontal surface 16c are formed.

  The second mounting ring pressing member 40 is a disk-shaped member, and is between the vertical surface 16a formed on the outer peripheral portion thereof and the inclined surface 16b formed on the outer peripheral portion of the second closing member 45. It arrange | positions so that the 2nd attachment ring 44 may be inserted | pinched.

  Next, a procedure when the fifth pipe protection device 38 configured as described above is attached to the inner peripheral surface 7b of the pipe 7 and the operation thereof will be described. As shown in FIG. 4, the worker first places the first closing member 14, the first mounting ring 13, and the first pressing member 15, the second closing member 45, and the second mounting ring 44 in the pipe 7. The first protective packing 23 provided in the lid 33 is pressed against the flange surface 8a of the flange portion 8 and is brought into close contact with the hole 7c. In this state, the second mounting ring is interposed between the second nut 43 and the second closing member 45 by tightening the three second nuts 43 screwed into the three second bolt shaft portions 42. 44, the first closing member 14 and the second tightening portion 46 can be sandwiched and tightened. At this time, each of the first closing member 14 (second attachment ring pressing member 40) and the second closing member 45 is provided. The second mounting ring 44 can be compressed between the outer peripheral edge portions (ring holding surface 16), and the second mounting ring 44 can be deformed in the direction toward the inner peripheral surface 7b of the tube 7 and brought into pressure contact therewith.

Next, similarly to the third reference technical example shown in FIG. 3, the first mounting ring 13 is connected to the pipe by tightening the three first nuts 21 screwed into the three first bolt shaft portions 17. 7 can be deformed in the direction toward the inner peripheral surface 7b and pressed.

  In this way, by bringing both the first and second mounting rings 13 and 44 into pressure contact with the inner peripheral surface 7b of the pipe 7, the first and second mounting rings 13 and 44 are in the direction of the pipe axis. A frictional resistance can be applied to the inner peripheral surface 7b of the tube 7 with respect to the movement, and the fifth pipe protection device 38 is detachably and strongly fixed to the inner peripheral surface 7b of the tube 7. Can be attached.

  As a result, when the three first nuts 21 are further tightened in this state, the lid 33 is attached to the pipe 7 when the first protective packing 23 is pressed against the flange surface 8a. The tube protection device 38 is not displaced in the axial direction of the tube 7, and the lid 33 can press the first protective packing 23 firmly against the flange surface 8 a to be brought into close contact therewith.

  As shown in FIG. 4, the first closing member 14 includes a first mounting ring closing member 39 and a second mounting ring pressing member 40, which are spaced from each other via a connecting portion 41. The first attachment ring 13 is sandwiched between the first attachment ring closing member 39 and the first pressing member 15 and is deformed in the direction toward the inner peripheral surface 7b of the pipe 7. At a predetermined distance from the second mounting ring 44 that is sandwiched between the second mounting ring pressing member 40 and the second closing member 45 and deforms in the direction toward the inner peripheral surface 7b of the pipe 7. They can be placed in a separated state.

  Accordingly, the first and second mounting rings 13 and 44 that are deformed can abut against each other so that the deformation is not hindered, and the first and second mounting rings 13 and 44 are connected to the tube. 7 can be deformed in an appropriate direction toward the inner peripheral surface 7b and pressed. As a result, the fifth pipe protection device 38 can be attached to the pipe 7 with appropriate strength.

  Next, with reference to FIG. 4, the sealing structure inside the 1st attachment ring 13 is demonstrated. The first mounting ring closing member 39 shown in the figure is formed with an insertion hole through which the second bolt shaft portion 42 is inserted, and a sealing portion 48 is attached to the insertion hole, and the second bolt shaft portion is attached. The gap with 42 is sealed.

  Since it is configured in this way, external water or dust is between the inner peripheral surface of the insertion hole through which the second tightening portion 46 of the lid 33 is inserted and the outer peripheral surface of the second tightening portion 46. In some cases, the inner space 27 of the first mounting ring 13 may enter through the opening 15a formed in the first pressing member 15, but the sealing portion 48 causes the first mounting ring closing member 39 to Intrusion into the back side of the tube 7 can also be prevented, and the inner peripheral surface 7b on the back side of the tube 7 can be prevented from being rusted or soiled, or being scratched. In addition, the sealing part 48 is for assisting the sealing function by the 2nd attachment ring 44, and can be abbreviate | omitted.

  Other than this, the configuration is the same as that of the third pipe protection device 29 shown in FIG. 3 and operates in the same manner, so the equivalent parts are denoted by the same reference numerals and description thereof is omitted.

Next, with reference to FIG. 6, 2nd Embodiment of the protection apparatus for pipes which concerns on this invention is described. The sixth pipe protection device 51 of the second embodiment shown in FIG. 6 and the fifth pipe protection device 38 of the first embodiment shown in FIG. 4 are different from the fifth pipe protection device 38 shown in FIG. Then, the second mounting ring pressing member 40 and the second closing member 45 sandwiching the second mounting ring 44 are arranged on the back side of the pipe 7 with respect to the first mounting ring closing member 39. In the sixth pipe protection device 51 shown in FIG. 6, the second mounting ring pressing member 40 and the second closing member 45 sandwiching the second mounting ring 44 are arranged so that the opening of the pipe 7 ( The place of the flange portion 8) is different.

  The sixth pipe protection device 51 shown in FIG. 6 is similar to the fifth pipe protection device 38 shown in FIG. 4 in that the second attachment ring pressing member 40 is for the first attachment ring via the cylindrical connecting portion 41. It is connected to the closing member 39. The connecting portion 41 is inserted through openings 45 a and 15 a formed in the second closing member 45 and the first pressing member 15, respectively.

  Each of the three first tightening portions 18 is inserted through openings 40 a and 45 b formed in the second attachment ring pressing member 40 and the second closing member 45, as shown in FIG. 6. Each of the openings 40a and 45b is formed in such a size that the first tightening portion 18 can be compressed and deformed as shown by a two-dot chain line.

  Each of the three second bolt shaft portions 42 is coupled to the second closing member 45 at the respective distal end portions, similarly to the fifth pipe protecting device 38 shown in FIG. Each of the three second tightening portions 46 is in contact with the plate surface of the second mounting ring pressing member 40 and the other end portion is screwed into the second bolt shaft portion 42. The end of the second nut 43 is in contact with the washer 47.

  Other than this, the configuration is the same as that of the fifth pipe protecting device 38 shown in FIG. 4 and operates in the same manner. Therefore, the equivalent parts are denoted by the same reference numerals and the description thereof is omitted.

  However, the pipe 7 shown in FIG. 1 is provided with a flange portion 8 at the right end portion, a first pipe protection device 11 is attached to the right end portion where the flange portion 8 is provided, and the second pipe portion is attached to the left end portion of the pipe 7. Although the example which attached the protective device 12 was given, it replaces with this and the flange part 8 is provided in each right and left edge part of a pipe | tube, and each end part in which these right and left flange parts 8 are provided is respectively 1st. A one-tube protection device 11 can be attached.

  Although not shown in the drawing, the second pipe protection device 12 can be attached to the left and right ends of the pipe 7 with respect to the pipe 7 in which the flange portions 8 are not provided at the left and right ends. .

  Similarly, the tube 7 shown in FIG. 3 is provided with a flange portion 8 at the right end portion, a third tube protection device 29 is attached to the right end portion where the flange portion 8 is provided, and the fourth end portion is attached to the left end portion of the tube 7. Although the example which attached the protection device 30 for pipe | tubes was given, it replaces with this and the flange part 8 is provided in each right and left edge part of the pipe | tube 7, and each edge part in which these left and right flange parts 8 are provided, A third tube protection device 29 can be attached to each.

  Although not shown in the drawing, the fourth tube protection device 30 can be attached to the left and right ends of the pipe 7 with respect to the pipe 7 in which the flange portions 8 are not provided at the left and right ends. .

  Further, in the fifth and sixth pipe protection devices 38 and 51 shown in FIGS. 4 and 6, the lid 33 and the first and second protective packings 23 and 31 are provided on the flange surface 8 a and the outer peripheral surface 8 b of the flange portion 8. In place of this, instead of this, as shown in FIG. 1, the lid 33 and the first protective packing 26 are in close contact with the peripheral edge 7 a of the tube 7 to seal the open end of the tube 7. It is good also as composition to do.

  Further, the fifth and sixth pipe protection devices 31 and 51 shown in FIGS. 4 and 6 press the second mounting ring 44 against the inner peripheral surface 7b of the pipe 7 with respect to the third pipe protection device 29 shown in FIG. In place of this, instead of this, the second mounting ring 44 with respect to the first and second tube protection devices 11 and 12 shown in FIG. 1 and the fourth tube protection device 30 shown in FIG. Can be configured to be brought into pressure contact with the inner peripheral surface 7 b of the tube 7.

  As described above, the tube protection device according to the present invention can be firmly and detachably attached to the inner peripheral surface of the tube, the flange surface of the flange portion provided at the end of the tube, and the edge periphery of the tube. It has an excellent effect of preventing water and dust from adhering to the inner peripheral surface of the pipe and the pipe, and can be applied to such a pipe protective device. Suitable for doing.

7 Pipe 7a Pipe edge peripheral part 7b Pipe inner peripheral face 7c Pipe inner hole 7d Pipe end outer peripheral face 8 Flange part 8a Flange face 8b Flange part outer peripheral face 11 First pipe protective device 12 Second pipe protective device 13 First mounting ring 14 First closing member 15 First pressing member 15a Opening portion 16 Ring holding surface 16a Vertical surface 16b Inclined surface 16c Horizontal surface 17 First bolt shaft portion 17a Male thread portion 18 First tightening portion 19, 25 Lid 20, 47 Washer 21 First nut 22 Handle 23, 26 First protective packing 27 Space 29 Third pipe protective device 30 Fourth pipe protective device 31 Second protective packing 32 Rubber layer 33, 35 Lid 33a, 35a Lid main body 33b, 35b Annular projection 38 Fifth pipe protection device 39 First mounting ring closing member 40 Second mounting ring pressing member 40a Mouth 41 connecting portion 42 and the second bolt shank 43 second nut 44 second mounting ring 45 second closure member 45a, 45b opening 46 second tightening portion 48 sealing portion 51 sixth tube protection device

Claims (7)

A substantially circular first closing member inserted into the pipe and a substantially circular first pressing member are arranged to face each other with a space therebetween, and the outer peripheral edges of the first closing member and the first pressing member, respectively. A first mounting ring having elasticity is arranged between the parts, and a first bolt shaft part provided by being coupled to the first closing member is provided with a lid, a first tightening part having elasticity, the first The presser member and the first mounting ring are inserted and tightened with a first nut that is screwed into the first bolt shaft portion, whereby the first mounting ring is connected to the first closing member and the first closing member. A protective device for a pipe that is sandwiched between a holding member and pressed against an inner peripheral surface of the pipe,
The plate surface of the lid is provided with a first protective packing , and
A substantially circular second closing member to be inserted into the pipe is disposed opposite to the first closing member with a space therebetween, and between the outer peripheral edge portions of the first closing member and the second closing member. A second mounting ring having elasticity, and a second bolt shaft portion coupled to the second closing member, the lid body, the second tightening portion, the first closing member, and the The second mounting ring is inserted into the second mounting ring, and the second mounting ring, the first closing member, and the second tightening portion are tightened with a second nut that is screwed into the second bolt shaft portion. 2 The attachment ring can be sandwiched between the first closing member and the second closing member to be brought into pressure contact with the inner peripheral surface of the pipe,
In a state where the first and second mounting rings press-contact the inner peripheral surface of the pipe, the first nut is further tightened to further compress and deform the first tightening portion, and the lid body is the first A pipe protective device characterized in that the protective packing is pressed against and closely adhered to a peripheral edge of the pipe or a flange surface of a flange provided at an end of the pipe. The lid body is a disc-shaped lid main body portion, a substantially cylindrical annular convex portion that is provided on the outer peripheral edge portion of the lid main body portion and projects in a substantially vertical direction with respect to the plate surface of the lid main body portion. Have
The plate surface of the lid main body is provided with the first protective packing, and the inner peripheral surface of the annular convex portion is provided with an outer peripheral surface of an end portion of the tube or a flange portion provided at an end portion of the tube. 2. The protective device for a pipe according to claim 1, further comprising a second protective packing that is attached to and closely contacts the outer peripheral surface. The pipe protective device according to claim 2, wherein the second protective packing is formed of a single foam sponge. The first closing member includes a first mounting ring closing member and a second mounting ring pressing member that are coupled to each other;
The first mounting ring closing member is disposed so as to sandwich the first mounting ring between the first pressing member and the first pressing ring.
The pipe protection member according to any one of claims 1 to 3, wherein the second attachment ring pressing member is disposed so as to sandwich the second attachment ring between the second attachment ring and the second closing member. apparatus.   5. The tube protection device according to claim 1, wherein the first tightening portion is formed of a substantially short cylindrical rubber-like elastic body or a spring.   The pipe protective device according to any one of claims 1 to 5, wherein the first protective packing is formed of a rubber layer. The pipe protective device according to any one of claims 1 to 6, wherein an outer surface of the lid is covered with a rubber layer.

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