JP6768808B2 - Pipe connection assembly - Google Patents

Description

The present invention relates to a pipe connection assembly, and more particularly to a pipe connection assembly capable of connecting a pipe to a pipe with a strong clamping force without leakage by using a pipe gripping means and a pipe deforming means. ..

Generally, pipes are widely used to carry fluids such as water and oil or gases such as gases, but these types of pipes are manufactured to a predetermined size (length) due to transportation and handling restrictions. Is sold.

For this reason, when constructing pipes in a section longer than the nominal length of the pipes, or when constructing pipes in a bent section, it is necessary to use a pipe connection device or weld the pipes to each other. I'm forced to do it. There are a wide variety of types of pipe connection devices for connecting pipes used for the pipes, but in particular, a grip ring (grip ring) is used to prevent the pipe fitted in the fitting from being pulled out. Piping connection devices with a mechanism are widely used for piping work due to the ease of connection work.

FIG. 1 is an exploded perspective view for explaining a conventional pipe connection method, FIG. 2 is a vertical sectional view of FIG. 1, and the conventional pipe connection method is as shown in FIGS. 1 and 2. After fitting the pipe 3 into the nut 2 with the female threaded portion 2a, the nut 2 is pressed against the male threaded portion 1a of the pipe 1 with the O-ring 6 and the washer 5 and the gripping ring 4 provided in this order on the pipe 3. It is designed to be screwed.

As a result, if the protruding portion 2b of the nut 2 compresses the O-ring 6 in a state where the grip ring 4 provided on the pipe 3 is in close contact with the first stopper 1b of the pipe 1, the outer periphery of the O-ring 6 and the pipe 3 is formed. The surface is sealed so that it is airtight, and the washer 5 pushes the grip ring 4. Therefore, the grip 4a of the grip ring 4 pushes the pipe 3 and clamps the pipe 3 so that the pipe 3 is not pulled out from the pipe connecting device. However, such an operation is performed until the nut 2 is completely screwed into the pipe 1. Will be done.

However, in such a conventional pipe connection method, since the fitting (mounting) depth of the gripping ring 4 to be fitted into the pipe 3 is limited to maintain a predetermined depth, the fitting depth of the gripping ring 4 is short. For example, if the pipe 3 is pulled out from the pipe connecting device, and conversely, if the fitting depth of the gripping ring 4 is long, when the nut 2 is screwed into the pipe 1, the tip of the pipe 3 is the second pipe. Since the nut is screwed in while being in close contact with the stopper 1c, the grip ring 4 is damaged, the outer peripheral surface of the pipe 3 is scratched by the grip 4a, and the overcompression of the O ring 6 causes a bottleneck phenomenon of the pipe. This caused the pipe to be pulled out.

Further, in the conventional pipe connection method, when the worker makes a mistake or the worker's work skill is low, the pipe 3 is pulled out from the pipe connection device because the assembly order of the parts is different. Causes a fatal flaw.

On the other hand, due to the above-mentioned problems, an advanced pipe fitting assembly has been developed and used as shown in FIG. FIG. 3 is a vertical cross-sectional view showing a conventional pipe connector assembly, and FIG. 4 is a vertical cross-sectional view in which a pipe is fitted into a fitting hole of a component with the lid removed from the housing. A first stopper 7a is formed inside the synthetic resin housing 7 so that the gripping ring 4, the washer 5, and the O-ring 6 are incorporated and positioned in this order, and the first stopper 7a is formed. A second stopper 7b that limits the fitting depth of the pipe 3 that has passed through the fitting holes of the grip ring 4, the washer 5, and the O-ring 6 is formed in the lower portion, and the grip ring incorporated in the housing 7. 4, the washer 5, and the O-ring 6 are protected by the lid 8.

Therefore, for the pipe connection work, after removing the lid 8 from the housing 7, if the pipe 3 to be constructed is pushed into the fitting hole of the component, the tip of the pipe 3 is caught by the second stopper 7b. Since the grip ring 4, the washer 5, and the O-ring 6 are located on the outer peripheral surface of the pipe 3 in this order, it is possible to connect the pipes.

However, such a connection method also has the following problems. First of all, the parts are sequentially fitted inside the housing to limit the fitting depth so that the fitting depth of the pipe is accurate, but the operator cannot be familiar with this and the parts from the housing. Frequently, the housing is removed and the parts are manually assembled to the pipe, and the above-mentioned problems occur repeatedly.

Secondly, since the piping connection device and the clamp between the pipes are performed by one grip ring, the pipe is supported when the pipe is a pipe through which a high-pressure fluid or gas flows, or when the grip ring is defective. The clamping force is reduced and the pipe is pulled out from the pipe connection device. If the pipe is pulled out with the pipe through which the gas passes indoors, or if the airtightness cannot be maintained and the gas leaks, a fatal defect that causes a serious disaster will occur.

Third, since there is no function to push the pipe so that it is in close contact with the second stopper of the pipe in the process of screwing the nut into the pipe, the pipe and the tip of the pipe are separated from each other as shown in FIG. A gap t is created between them, and a fluid or gas leaks through the gap.
Fourth, since there is no function of sealing the inside of the nut, moisture permeates the inside, so that the grip ring and the washer are corroded during long-term use, which causes a decrease in the clamping force.

A technical problem to be solved by the present invention is to provide a pipe connection assembly capable of connecting a pipe to a pipe with a strong clamping force without leakage by using a pipe gripping means and a pipe deforming means.

The pipe connection assembly according to the present invention for solving the above-mentioned technical problems includes a pipe gripping means provided on the outer peripheral surface of the pipe to grip the pipe and keep it in an airtight holding state, and the pipe gripping means is fitted into the pipe. Temporary fixing means for temporarily fixing in a possible state, pressing means screwed to the outer peripheral surface of the temporary fixing means and detachably provided to press the pipe gripping means toward the temporary fixing means, and the temporary fixing means. When the pipe provided between the stopping means and the pressing means and to be connected works penetrates the pressing means and the pipe gripping means and presses the temporary fixing means above a predetermined pressure, the pressing means and the pressing means and The engagement / disengaging means for releasing the engagement between the temporary fixing means and the pressing means are fitted inside the pressing means, and the pressing means presses the outer surface of the pipe in a state of being completely tightened to the pipe to be connected. It is provided with a pipe deforming means for deforming the pipe.

Further, the temporary fixing means in the present invention has a mounting pipe having a notch at a facing portion and a mounting portion on the inner surface on which the pipe gripping means is mounted, and a male screw shape on the outer surface of the above-mentioned mounting pipe. A tightening portion for pressing means formed in, and a tightening holding portion having an elastic piece formed at the lower part of the previously described tube so as to have a diameter larger than that of the previously described tube and deformed by an external force applied to the lower side. Provided inside the tightening holding portion, a locking portion having first and second locking grooves extending from the lower part of the above-mentioned placement pipe and spaced apart from each other in the vertical direction at predetermined intervals. Is preferable.

Further, the pipe gripping means in the present invention is mounted in a state of being in contact with the above-described mounting portion, and grips the outer surface of the pipe to prevent movement in a direction opposite to the approach direction, and the grip ring. A first washer placed on the above-mentioned resting portion in contact with the upper surface of the grip ring and a first washer placed on the above-mentioned resting portion in contact with the upper surface of the washer and in close contact with the outer surface of the pipe. It is preferable to include an O-ring that is kept in an airtight state, and a second washer that is placed on the above-mentioned mounting portion in a state of being in contact with the upper surface of the O-ring.

Furthermore, the pressing means in the present invention includes a female screw-shaped pipe tightening portion to be tightened to the pressing means tightening portion, a latch groove formed by repeating an uneven shape on the lower surface of the pipe tightening portion, and the pipe tightening. It is preferable to include a deforming means mounting portion extending above the portion and on which the pipe deforming means is mounted.

Furthermore, the engagement release means in the present invention is provided with a latch mounting portion having a connection piece to be fitted into the notch portion and a latch mounting portion projecting upward from the upper surface of the latch mounting portion and coupled with the latch groove. In this case, a latch that engages with the latch groove to prevent the pressing means from rotating, and a tubular extension at the lower part of the latch mounting portion, which protrudes outward so as to be hooked on the first locking groove on the outer surface of the lower part. The elastic piece is projected downward from the locking claw forming portion on which the locking claw to be provided is formed and the lower surface of the connecting piece, and as the latch mounting portion moves downward by the pipe. It is preferable to provide a release protrusion that moves downward while pressing.

Furthermore, the pipe deforming means in the present invention is formed in a circular tubular shape as a whole, and is formed by partially notching from the upper side to the lower side at a predetermined angular interval. A main body having a portion, a deformed protruding portion that protrudes inward from the inner surface of the main body to form an annular shape, and presses and deforms the outer surface of a pipe fitted by compression deformation of the main body, and an outer surface of the main body. It is preferable to provide a projecting portion moving means which is projected outward from the lower side and moves the deformed projecting portion inward by advancing the deforming means mounting portion to the pipe.

Furthermore, it is preferable that the deformed protrusion in the present invention is made of a material having a hardness superior to that of the main body.

Furthermore, it is preferable that the protruding portion moving means in the present invention has first and second pressing surfaces formed in a slope shape on both the upper and lower sides, respectively.

According to the present invention, the pipe can be connected to the pipe with a strong clamping force without leakage by using the pipe gripping means and the pipe deforming means, and even if the gripping ring or the like is pulled out in a specific situation, the pipe The advantage is that the pipe is not removed from the pipe connection assembly by the transforming means.

It is a figure for the conventional pipe connection method. It is a figure for the conventional pipe connection method. It is a figure for the conventional pipe connection method. It is a figure for the conventional pipe connection method. It is an exploded perspective view which shows the structure of the pipe connection assembly which concerns on one Embodiment of this invention. It is sectional drawing which shows the operating state of the pipe connection assembly which concerns on one Embodiment of this invention. It is a figure which shows the state which the pipe connection assembly which concerns on one Embodiment of this invention connects a pipe. It is a perspective view which shows the structure of the pipe connection assembly which concerns on one Embodiment of this invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 5, the pipe connection assembly 100 according to the present embodiment includes a pipe gripping means 110, a temporary fixing means 120, a pressing means 130, an engagement releasing means 140, and a pipe deforming means 150. Is preferable.

First, the temporary fixing means 120 is a component that temporarily fixes the pipe gripping means 110 in a state where it can be fitted into the pipe. That is, the temporary fixing means 120 provides a space in which the detailed components constituting the pipe gripping means 120 are fitted outside in the order of fitting into the pipe 3 and temporarily fixed in a state of being in close contact with each other. For this reason, the temporary fixing means 120 in the present embodiment preferably includes a mounting tube 121, a pressing means tightening portion 122, and a tightening holding portion 123, as shown in FIG.

First, the above-mentioned placement tube 121 has a circular tubular shape as a whole, and has notches 124 at opposite positions as shown in FIG. Further, a mounting portion 125 on which the pipe gripping means 110 is mounted is formed on the inner surface of the above-mentioned placement pipe 121. The above-mentioned placement portion 125 is formed so as to have a step protruding inward from the other inner surface of the above-mentioned placement pipe 121, and the step allows the pipe gripping means 110 to be in close contact with each other without being able to advance further. It is temporarily fixed in the state where it is done. Therefore, the inner diameter of the above-described pipe 121 is substantially equal to the outer diameter of the pipe gripping means 110.

Further, the cutout portion 124 is formed by cutting out the above-mentioned placement tube 121 from the upper side to the lower side in the vertical direction, and is formed at a position where the two cutout portions face each other. The cutout portion 124 is formed with a width sufficient to allow the connection piece of the engagement release means 140 to pass through.

Next, as shown in FIG. 5, the tightening portion 122 can be tightened to the pipe tightening portion 131 formed in a male screw shape on the outer surface of the above-mentioned placement pipe 121 and formed in a female screw structure on the inner surface of the pressing means 130. It is formed in a male thread structure.

Next, as shown in FIG. 5, the tightening holding portion 123 is formed in the lower part of the previously described tube 121 so as to have a diameter larger than that of the previously described tube, and is elastically deformed by an external force applied to the lower side. It is a component having a piece 126. Therefore, the tightening holding portion 123 partially cuts out a part of the flat surface portion 123a to form a large number of elastic pieces 126 having elastic force, and these large number of elastic pieces 126 are as shown in FIG. It is formed at a position corresponding to the arrangement position of the release protrusion 144 of the engagement release means 140.

Next, as shown in FIG. 6, the locking portion 127 extends from the above-mentioned placement pipe 121 inside the tightening holding portion 123, and is vertically spaced from the inner surface at predetermined intervals. It has a structure in which the first and second locking grooves 127a and 127b are continuously formed. Here, the first locking groove 127a is engraved so that the locking claw 147 of the engaging release means 140 is caught and does not move upward, and is caught in the first locking groove 127a. The engagement release means 140 holds a state in which the rotation of the pressing means 130 is blocked.

Further, as shown in FIG. 6, the formation position of the second locking groove 127b is lower than the first locking groove 127a, and the second locking groove 127b is caught in the second locking groove 127b. The engagement releasing means 140 releases the engagement in a state in which the latch is sufficiently moved downward and the pressing means 130 is rotatable.

Next, the pipe gripping means 110 is a component that is provided on the outer peripheral surface of the pipe 3 so as to grip the pipe and keep it in an airtight state. That is, the pipe gripping means 110 is provided in a state of being closely and crimped to the pipe 3 by the pipe connecting assembly 100 to grip the pipe so that it does not move, and maintains airtightness so that a leakage phenomenon does not occur on the outer surface of the pipe. Play a role.

For this reason, it is preferable that the pipe gripping means 110 in the present embodiment specifically includes a gripping ring 111, a first washer 112, an O-ring 113, and a second washer 114. First, as shown in FIG. 5, the gripping ring 111 has the same structure as the conventional gripping ring, and strongly clamps the outer surface of the pipe while being bitten by the pipe 3 so that the pipe 3 does not move. Play a role.

Next, the first washer 112 has an overall circular ring shape, but is made of a thin plate-shaped material. The first washer 112 allows the other component, i.e., the O-ring 113 to be provided in the correct position between the gripping ring 111 and the O-ring 113 in an undamaged state.

Further, the O-ring 113 is formed from a stretchable material so as to exhibit a ring shape, and if necessary, two or more of them are continuously provided or formed so as to have a double structure. May be done.

Next, the second washer 114 has substantially the same structure as the first washer 111, and is provided in a state of being in close contact with the upper side of the O-ring 113, and the pressing means 130 or the pipe deforming means 150. Protects the O-ring from damage. At this time, the second washer 114 may have a structure in which a second pressing surface 114a having a slope shape inclined outward is further arranged on the upper surface. The second pressing surface 114a serves to push the second pressed surface 153b inward when the pipe deforming means 150, which will be described later, enters, so that the pipe 3 is effectively deformed.

Next, as shown in FIG. 5, the pressing means 130 is screwed onto the outer peripheral surface of the temporary fixing means 120 and is detachably provided, and the pipe gripping means 110 is directed toward the temporary fixing means 120 and is provided. , A component that presses toward the pipe 1. That is, the pressing means 130 presses the pipe gripping means 110 toward the temporary fixing means 120 in a state where the pressing means is coupled to the temporary fixing means 120, and the pressing means 130 presses the pipe 1 In the state of being combined with, the pipe gripping means 110 is pressed toward the pipe and the pipe deforming means 150 is strongly pressed inward.

For this purpose, as shown in FIGS. 5 and 6, the pressing means 130 in the present embodiment may specifically include a pipe tightening portion 131, a latch groove 132, and a deforming means mounting portion 133. preferable. First, as shown in FIG. 5, the pipe tightening portion 131 has a female screw shape to be tightened to the pressing means tightening portion 122, and is formed on the lower side of the inner surface of the pressing means 130.

Further, as shown in FIG. 5, the latch groove 132 is formed by repeating an uneven shape on the lower surface of the pipe tightening portion 131, and as shown in FIG. 6, the pressing means 130 and the temporary fixing means 120 are formed. The shape and size of the groove is provided so that the latch groove 132 has a state of being engaged with the latch 142 in the coupled state. In the state where the latch groove 132 and the latch 142 are engaged in this way, the pressing means 130 cannot rotate, so that it cannot be removed from the screwed temporary fixing means 120.

Next, as shown in FIG. 6, the deforming means mounting portion 133 is a component that extends above the pipe tightening portion 131 and on which the pipe deforming means 150 is mounted. Therefore, the deforming means mounting portion 133 has a shape that substantially matches the shape of the outer surface of the pipe deforming means 150, and in particular, tilts downward so that the protruding portion moving means 153 can be strongly pressed inward. As described above, the first pressing surface 133a formed in a slope shape is formed. The first pressing surface 133a advances toward the pipe 1 while the pressing means 130 is tightened by the pipe 1 and the screw structure, so that the upper slope of the protruding portion moving means 153, that is, the first covering The pressing surface 153a is pressed inward.

Next, as shown in FIG. 5, the engagement releasing means 140 is provided between the temporary fixing means 120 and the pressing means 130, and the pipe 3 to which the connection work should be performed is the pressing means 130 and the pipe gripping. When the temporary fixing means 120 is pressed to a predetermined pressure or higher through the means 110, it is a component that makes the engagement between the pressing means 130 and the temporary fixing means 120 releaseable. That is, in the engagement / disengaging means 140 of the present embodiment, the pipe 3 to be connected with the pressing means 130 and the temporary fixing means 120 temporarily connected is fitted to a depth equal to or higher than a preset depth. Only when the engaging release means 140 is pressed, the pressing means 130 and the temporary fixing means 120 play a role of releasing the engaging state so as to be separated.

Therefore, in the present embodiment, as shown in FIG. 5, the engagement / disengaging means 140 is specifically provided with a latch mounting portion 141, a latch 142, a locking claw forming portion 143, and a release projection 144. It may be configured to be provided. Here, as shown in FIG. 5, the latch mounting portion 141 has a shape 146 formed in a horizontal plane state and having a predetermined portion opened so as to have a connection piece 145 that fits into the cutout portion 124. Therefore, the connection piece 145 is formed to have a width that allows it to fit into the notch 124.

Further, as shown in FIG. 5, when the latch 142 is projected upward from the upper surface of the latch mounting portion 141 and is coupled to the latch groove 132 as shown in FIG. 8, the latch groove It is a component that engages with 132 to prevent the pressing means 130 from rotating. Specifically, the latch 142 is formed in one or more of the latch mounting portions 141 by projecting upward from the portion where the connection piece 145 is formed.

Next, as shown in FIGS. 5 and 6, the locking claw forming portion 143 is tubularly extended to the lower portion of the latch mounting portion 141, and the first and second locking grooves 127a, on the outer surface of the lower portion. It is a component forming a locking claw 147 that protrudes outward so as to be hooked on 127b. Therefore, the locking claw 147 is formed so as to have a slope on the lower side and a right-angled surface on the upper side so as to easily enter the lower side.

Next, as shown in FIGS. 5 and 6, the release projection 144 is projected downward from the lower surface of the connection piece 145, and as the latch mounting portion 141 is moved downward by the pipe 1. , A component that moves downward while pushing the elastic piece 126. That is, when the elastic piece 126 is pushed downward while the release protrusion 144 moves downward, the positional relationship between the temporary fixing means 120 and the pressing means 130 does not change, but the engagement is released. The means 140 is in a state of moving away from the pressing means 130. Then, the state in which the latch 142 is engaged with the latch groove 132 while moving downward is released, and the pressing means 130 becomes a rotatable state.

Next, as shown in FIG. 5, the pipe deforming means 150 is fitted inside the pressing means 130, and the pressing means 130 is completely tightened to the pipe 1 to be connected to the pipe 3. It is a component that presses and deforms the outer surface. That is, the pipe deforming means 150 keeps the expanded state when the pressing means 130 is coupled to the temporary fixing means 120, and the pressing means 130 is compressed while being coupled to the pipe 1. It is a component that strongly presses the outer surface of the pipe 3 so that a part of the pipe 3 is bent inward and deformed.

For this reason, it is preferable that the pipe deforming means 150 in the present embodiment includes a main body 151, a deforming protruding portion 152, and a protruding portion moving means 153, as shown in FIGS. 5 and 6. First, as shown in FIG. 5, the main body 151 is formed in a circular tubular shape as a whole, and is formed by being partially cut out from the upper side to the lower side at a predetermined angular interval. It is a component having a notch 154. Therefore, when an external force is applied by the first notch 154, the main body 151 can be deformed into a shape in which the first notch 154 is brought into close contact with each other in a minimized state and the overall shape is compressed. is there.

Further, as shown in FIGS. 5 and 6, the deformed protruding portion 152 is formed in an annular shape by protruding inward from the inner surface of the main body 151, and the pipe 3 fitted by the compression deformation of the main body 151. It is a component that presses and deforms the outer surface. Therefore, as shown in FIG. 7, the deformed protrusions 152 are separated from each other in the expanded state of the main body 151, but are in close contact with each other in the compressed state to form an annular shape. The outer surface of the pipe 3 will be pressed. Therefore, the deformed portion of the outer surface of the pipe 3 is also deformed in an annular shape. It is preferable that the deformed protruding portion 152 is made of a metal material having a hardness higher than that of the main body 151 because the pipe 3 can be deformed more easily.

Next, as shown in FIGS. 5 and 6, the projecting portion moving means 153 is projected outward from the lower side of the outer surface of the main body 151, and the deforming means mounting portion 133 is advanced to the pipe 1. It is a component that moves the deformed protrusion 152 inward. That is, in the projecting portion moving means 153, as the pressing means 130 is coupled to the pipe 1 and advances toward the pipe 1, the first pressing surface 133a is pushed and moved inward to the opposite side. The deformed protruding portion 152 formed deforms the pipe 3 while pressing it.

Therefore, as shown in FIGS. 5 and 6, the projecting portion moving means 153 is formed with first and second pressed surfaces 153a and 153b formed in a slope shape on both the upper and lower sides, respectively. Is preferable. The first and second pressed surfaces 153a and 153b are pressed while being in close contact with the first pressing surface 133a of the pressing means 130 and the second pressing surface 114a of the second washer, respectively.

Further, it is preferable that the protruding portion moving means 153 also has a second notch portion 156 formed on the outer side at a predetermined interval. The second notch 156, like the first notch 154, is also formed to facilitate compression of the pipe deforming means 150.

As shown in FIG. 5, the pipe connection assembly 100 according to the present embodiment includes a pipe gripping means 110, a temporary fixing means 120, a pressing means 130, an engagement releasing means 140, and a pipe deforming means 150. Is preferable.

First, the temporary fixing means 120 is a component that temporarily fixes the pipe gripping means 110 in a state where it can be fitted into the pipe. That is, the temporary fixing means 120 provides a space in which the detailed components constituting the pipe gripping means 120 are fitted outside in the order of fitting into the pipe 3 and temporarily fixed in a state of being in close contact with each other. For this reason, it is preferable that the temporary fixing means 120 in the present embodiment includes a mounting tube 121, a pressing means tightening portion 122, and a tightening holding portion 123, as shown in FIG.

First, the above-mentioned placement tube 121 has a circular tubular shape as a whole, and has notches 124 at opposite positions as shown in FIG. Further, a mounting portion 125 on which the pipe gripping means 110 is mounted is formed on the inner surface of the above-mentioned placement pipe 121. The above-mentioned placement portion 125 is formed so as to have a step protruding inward from the other inner surface of the above-mentioned placement pipe 121, and the step allows the pipe gripping means 110 to be in close contact with each other without being able to advance further. It is temporarily fixed in the state where it is done. Therefore, the inner diameter of the above-described pipe 121 is substantially equal to the outer diameter of the pipe gripping means 110.

Further, the cutout portion 124 is formed by cutting out the above-mentioned placement tube 121 from the upper side to the lower side in the vertical direction, and is formed at a position where the two cutout portions face each other. The cutout portion 124 is formed with a width sufficient to allow the connection piece of the engagement release means 140 to pass through.

Next, as shown in FIG. 5, the tightening portion 122 can be tightened to the pipe tightening portion 131 formed in a male screw shape on the outer surface of the above-mentioned placement pipe 121 and formed in a female screw structure on the inner surface of the pressing means 130. It is formed in a male thread structure.

Next, as shown in FIG. 5, the tightening holding portion 123 is formed in the lower part of the previously described tube 121 so as to have a diameter larger than that of the previously described tube, and is elastically deformed by an external force applied to the lower side. It is a component having a piece 126. Therefore, the tightening holding portion 123 partially cuts out a part of the flat surface portion 123a to form a large number of elastic pieces 126 having elastic force, and these large number of elastic pieces 126 are as shown in FIG. It is formed at a position corresponding to the arrangement position of the release protrusion 144 of the engagement release means 140.

Next, as shown in FIG. 6, the locking portion 127 extends from the above-mentioned placement pipe 121 inside the tightening holding portion 123, and is vertically spaced from the inner surface at predetermined intervals. It has a structure in which the first and second locking grooves 127a and 127b are continuously formed. Here, the first locking groove 127a is engraved so that the locking claw 147 of the engaging release means 140 is caught and does not move upward, and is caught in the first locking groove 127a. The engagement release means 140 holds a state in which the rotation of the pressing means 130 is blocked.

Further, as shown in FIG. 6, the formation position of the second locking groove 127b is lower than the first locking groove 127a, and the second locking groove 127b is caught in the second locking groove 127b. The engagement releasing means 140 releases the engagement in a state in which the latch is sufficiently moved downward and the pressing means 130 is rotatable.

Next, the pipe gripping means 110 is a component that is provided on the outer peripheral surface of the pipe 3 so as to grip the pipe and keep it in an airtight state. That is, the pipe gripping means 110 is provided in a state of being closely and crimped to the pipe 3 by the pipe connecting assembly 100 to grip the pipe so that it does not move, and maintains airtightness so that a leakage phenomenon does not occur on the outer surface of the pipe. Play a role.

For this reason, it is preferable that the pipe gripping means 110 in the present embodiment specifically includes a gripping ring 111, a first washer 112, an O-ring 113, and a second washer 114. First, as shown in FIG. 5, the gripping ring 111 has the same structure as the conventional gripping ring, and strongly clamps the outer surface of the pipe while being bitten by the pipe 3 so that the pipe 3 does not move. Play a role.

Next, the first washer 112 has an overall circular ring shape, but is made of a thin plate-shaped material. The first washer 112 allows the other component, i.e., the O-ring 113 to be provided in the correct position between the gripping ring 111 and the O-ring 113 in an undamaged state.

Further, the O-ring 113 is formed from a stretchable material so as to exhibit a ring shape, and if necessary, two or more of them are continuously provided or formed so as to have a double structure. May be done.

Next, the second washer 114 has substantially the same structure as the first washer 111, and is provided in a state of being in close contact with the upper side of the O-ring 113, and the pressing means 130 or the pipe deforming means 150. Protects the O-ring from damage. At this time, the second washer 114 may have a structure in which a second pressing surface 114a having a slope shape inclined outward is further arranged on the upper surface. The second pressing surface 114a serves to push the second pressed surface 153b inward when the pipe deforming means 150, which will be described later, enters, so that the pipe 3 is effectively deformed.

Next, as shown in FIG. 5, the pressing means 130 is screwed onto the outer peripheral surface of the temporary fixing means 120 and is detachably provided, and the pipe gripping means 110 is directed toward the temporary fixing means 120 and is provided. , A component that presses toward the pipe 1. That is, the pressing means 130 presses the pipe gripping means 110 toward the temporary fixing means 120 in a state where the pressing means is coupled to the temporary fixing means 120, and the pressing means 130 presses the pipe 1 In the state of being combined with, the pipe gripping means 110 is pressed toward the pipe and the pipe deforming means 150 is strongly pressed inward.

For this purpose, as shown in FIGS. 5 and 6, the pressing means 130 in the present embodiment may specifically include a pipe tightening portion 131, a latch groove 132, and a deforming means mounting portion 133. preferable. First, as shown in FIG. 5, the pipe tightening portion 131 has a female screw shape to be tightened to the pressing means tightening portion 122, and is formed on the lower side of the inner surface of the pressing means 130.

Further, as shown in FIG. 5, the latch groove 132 is formed by repeating an uneven shape on the lower surface of the pipe tightening portion 131, and as shown in FIG. 6, the pressing means 130 and the temporary fixing means 120 are formed. The shape and size of the groove is provided so that the latch groove 132 has a state of being engaged with the latch 142 in the coupled state. In the state where the latch groove 132 and the latch 142 are engaged in this way, the pressing means 130 cannot rotate, so that it cannot be removed from the screwed temporary fixing means 120.

Next, as shown in FIG. 6, the deforming means mounting portion 133 is a component that extends above the pipe tightening portion 131 and on which the pipe deforming means 150 is mounted. Therefore, the deforming means mounting portion 133 has a shape that substantially matches the shape of the outer surface of the pipe deforming means 150, and in particular, tilts downward so that the protruding portion moving means 153 can be strongly pressed inward. As described above, the first pressing surface 133a formed in a slope shape is formed. The first pressing surface 133a advances toward the pipe 1 while the pressing means 130 is tightened by the pipe 1 and the screw structure, so that the upper slope of the protruding portion moving means 153, that is, the first covering The pressing surface 153a is pressed inward.

Next, as shown in FIG. 5, the engagement releasing means 140 is provided between the temporary fixing means 120 and the pressing means 130, and the pipe 3 to which the connection work should be performed is the pressing means 130 and the pipe gripping. When the temporary fixing means 120 is pressed to a predetermined pressure or higher through the means 110, it is a component that makes the engagement between the pressing means 130 and the temporary fixing means 120 releaseable. That is, in the engagement / disengaging means 140 of the present embodiment, the pipe 3 to be connected with the pressing means 130 and the temporary fixing means 120 temporarily connected is fitted to a depth equal to or higher than a preset depth. Only when the engaging release means 140 is pressed, the pressing means 130 and the temporary fixing means 120 play a role of releasing the engaging state so as to be separated.

Therefore, in the present embodiment, as shown in FIG. 5, the engaging / releasing means 140 is specifically provided with a latch mounting portion 141, a latch 142, a locking claw forming portion 143, and a release projection 144. It may be configured to be provided. Here, as shown in FIG. 5, the latch mounting portion 141 has a shape 146 formed in a horizontal plane state and having a predetermined portion opened so as to have a connection piece 145 that fits into the cutout portion 124. Therefore, the connection piece 145 is formed to have a width that allows it to fit into the notch 124.

Further, as shown in FIG. 5, when the latch 142 is projected upward from the upper surface of the latch mounting portion 141 and is coupled to the latch groove 132 as shown in FIG. 8, the latch groove It is a component that engages with 132 to prevent the pressing means 130 from rotating. Specifically, the latch 142 is formed in one or more of the latch mounting portions 141 by projecting upward from the portion where the connection piece 145 is formed.

Next, as shown in FIGS. 5 and 6, the locking claw forming portion 143 is tubularly extended to the lower portion of the latch mounting portion 141, and the first and second locking grooves 127a, on the outer surface of the lower portion. It is a component forming a locking claw 147 that protrudes outward so as to be hooked on 127b. Therefore, the locking claw 147 is formed so as to have a slope on the lower side and a right-angled surface on the upper side so as to easily enter the lower side.

Next, as shown in FIGS. 5 and 6, the release projection 144 is projected downward from the lower surface of the connection piece 145, and as the latch mounting portion 141 is moved downward by the pipe 1. , A component that moves downward while pushing the elastic piece 126. That is, when the elastic piece 126 is pushed downward while the release protrusion 144 moves downward, the positional relationship between the temporary fixing means 120 and the pressing means 130 does not change, but the engagement is released. The means 140 is in a state of moving away from the pressing means 130. Then, the state in which the latch 142 is engaged with the latch groove 132 while moving downward is released, and the pressing means 130 becomes a rotatable state.

Next, as shown in FIG. 5, the pipe deforming means 150 is fitted inside the pressing means 130, and the pressing means 130 is completely tightened to the pipe 1 to be connected to the pipe 3. It is a component that presses and deforms the outer surface. That is, the pipe deforming means 150 keeps the expanded state when the pressing means 130 is coupled to the temporary fixing means 120, and the pressing means 130 is compressed while being coupled to the pipe 1. It is a component that strongly presses the outer surface of the pipe 3 so that a part of the pipe 3 is bent inward and deformed.

For this reason, it is preferable that the pipe deforming means 150 in the present embodiment includes a main body 151, a deforming protruding portion 152, and a protruding portion moving means 153, as shown in FIGS. 5 and 6. First, as shown in FIG. 5, the main body 151 is formed in a circular tubular shape as a whole, and is formed by being partially cut out from the upper side to the lower side at a predetermined angular interval. It is a component having a notch 154. Therefore, when an external force is applied by the first notch 154, the main body 151 can be deformed into a shape in which the first notch 154 is brought into close contact with each other in a minimized state and the overall shape is compressed. is there.

Further, as shown in FIGS. 5 and 6, the deformed protruding portion 152 is formed in an annular shape by protruding inward from the inner surface of the main body 151, and the pipe 3 fitted by the compression deformation of the main body 151. It is a component that presses and deforms the outer surface. Therefore, as shown in FIG. 7, the deformed protrusions 152 are separated from each other in the expanded state of the main body 151, but are in close contact with each other in the compressed state to form an annular shape. The outer surface of the pipe 3 will be pressed. Therefore, the deformed portion of the outer surface of the pipe 3 is also deformed in an annular shape. It is preferable that the deformed protruding portion 152 is made of a metal material having a hardness higher than that of the main body 151 because the pipe 3 can be deformed more easily.

Next, as shown in FIGS. 5 and 6, the projecting portion moving means 153 is projected outward from the lower side of the outer surface of the main body 151, and the deforming means mounting portion 133 is advanced to the pipe 1. It is a component that moves the deformed protrusion 152 inward. That is, in the projecting portion moving means 153, as the pressing means 130 is coupled to the pipe 1 and advances toward the pipe 1, the first pressing surface 133a is pushed and moved inward to the opposite side. The deformed protruding portion 152 formed deforms the pipe 3 while pressing it.

Therefore, as shown in FIGS. 5 and 6, the projecting portion moving means 153 is formed with first and second pressed surfaces 153a and 153b formed in a slope shape on both the upper and lower sides, respectively. Is preferable. The first and second pressed surfaces 153a and 153b are pressed while being in close contact with the first pressing surface 133a of the pressing means 130 and the second pressing surface 114a of the second washer, respectively.

Further, it is preferable that the protruding portion moving means 153 also has a second notch portion 156 formed on the outer side at a predetermined interval. The second notch 156, like the first notch 154, is also formed to facilitate compression of the pipe deforming means 150.

According to the present invention, the pipe can be connected to the pipe with a strong clamping force without leakage by using the pipe gripping means and the pipe deforming means, and even if the gripping ring or the like is detached in a specific situation, the pipe is deformed. The advantage is that the pipe is not removed from the pipe connection assembly by means.

Claims (1)

A pipe gripping means (110) provided on the outer peripheral surface of the pipe to grip the pipe and keep it in an airtight state.
A mounting portion (125) on which the pipe gripping means is mounted is formed, and a temporary fixing means (120) for temporarily fixing the pipe gripping means in a state where it can be fitted into the pipe.
It is screwed onto the outer peripheral surface of the temporary fixing means and is detachably provided, and includes a pipe tightening portion (131), a latch groove (132), and a deforming means mounting portion (133), and temporarily fixes the pipe gripping means. A pressing means (130) that presses toward the means, and
When a pipe provided between the temporary fixing means and the pressing means and to be connected works penetrates the pressing means and the pipe gripping means and presses the temporary fixing means to a predetermined pressure or higher. An engagement release means (140) that releases the engagement between the pressing means and the temporary fixing means, and
The pipe deforming means (150), which is fitted inside the pressing means and presses and deforms the outer surface of the pipe in a state where the pressing means is completely tightened to the pipe to be connected, includes.
The pipe gripping means
A gripping ring (111) that is mounted in contact with the above-mentioned mounting portion and grips the outer surface of the pipe to prevent movement in a direction opposite to the approach direction.
A first washer (112) placed on the above-mentioned resting portion in contact with the upper surface of the grip ring, and a first washer (112).
An O-ring (113) that is placed on the above-mentioned placing portion in a state of being in contact with the upper surface of the first washer and is in close contact with the outer surface of the pipe to maintain an airtight state.
A second washer (114), which is placed on the above-mentioned resting portion in contact with the upper surface of the O-ring and has a second pressing surface (114a) having a slope shape inclined outward on the upper surface, is included. ,
The pipe deforming means
A main body (151) having a first notch, which is formed in a circular tubular shape as a whole and is partially cut out from the upper side to the lower side at a predetermined angular interval.
A deformed protruding portion (152) that protrudes inward from the inner surface of the main body to form an annular shape and presses and deforms the outer surface of the pipe fitted by the compression deformation of the main body.
Outwardly projecting from the lower side of the outer surface of the body movement, the slope-shaped pressed surface (153a, 153b) comprises a, the deformation members inside the advancement of the pipe of the deformable means mounting portion Including a protrusion moving means (153) for causing
A pipe connection assembly characterized in that slope-shaped first and second pressed surfaces (153a, 153b) are formed so as to face the upper and lower sides of the projecting portion moving means, respectively.

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