TWI658230B - Pipe member - Google Patents

Abstract

[Problem] Provide a pipe member capable of removing a tubular window member without removing the pipe member from the fluid piping member. [Solution] This pipe member (100) is a part of a fluid pipe which is assembled between fluid pipe members. The pipe member (100) includes a pipe member body (102), a tubular window member (104), and a holding member (106). The tubular window member (104) is made of a transparent material so that the inner flow path (112) and the blade member (108) can be viewed from the outside. The tubular window member (104) is held in a position assembled to the pipe member body (102) by a holding member (106). The holding member (106) is displaced rearward from the holding position to be located in the release position, thereby separating the holding member (106) from the tubular window member (104) and releasing the holding of the tubular window member (104). Thereby, the tubular window member (104) can be removed from the pipe member body (102) through the side opening portion (130).

Description

Pipe member

The present invention relates to a pipe member assembled between fluid piping members to form a part of a fluid pipe, and more specifically, to a pipe member capable of confirming a fluid flow in a fluid pipe.

In order to visually confirm the flow of the fluid in the fluid piping, a pipe member that can visually inspect the inside of the flow path from a portion made of a transparent material is known. For example, the flow sensor shown in Patent Document 1 includes a transparent pipe, a joint screwed to both ends, and a turbine unit installed in the pipe. When a fluid flows in the pipe, the turbine unit changes its rotation according to the flow rate. Direction and axis direction, the fluid flow and its flow rate can be measured by reading the displacement of the turbine. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 58-9025

When the above-mentioned flow sensor is used continuously, the inner peripheral surface of the pipe is gradually stained by the fluid flowing through the transparent pipe or the solids contained therein, and the visibility of the inside of the flow path may be deteriorated. In this case, remove the transparent pipe to clean the inside or exchange new pipe. However, in the conventional pipe member such as the above-mentioned flow sensor, in order to remove the transparent pipe member that becomes the tubular window member, it is necessary to remove the pipe member itself from the fluid pipe member and further disassemble the pipe member. This kind of work is very complicated and time-consuming.

Therefore, the present invention aims to provide a pipe member, which can remove the tubular window member without removing the pipe member from the fluid piping member.

That is, the present invention provides a pipe member, which is a pipe member assembled between the fluid piping members and constituting a part of the fluid piping. The long axis of the passage communicates from the side to the side opening of the opening of the first passage; A tubular window member is a tubular window member assembled to the pipe member body through the side opening, and has a The pipe member body communicates with the first passage to form a second passage of the pipe member, and at least a part of the pipe member is made of a transparent material, and the at least a part of the pipe member can be used to visually observe the inside of the flow passage; and the holding member is The holding member attached to the pipe member body is displaceable between: a holding position at a position where the tubular window member is assembled with the tubular window member by engaging with the tubular window member; The window member is separated to release the holding of the tubular window member so that the tubular window member can be detached from the pipe member body through the side opening. Divide the liberation position.

In this pipe member, the tubular window member can be removed through the side opening of the pipe member body. Therefore, it is not necessary to remove the pipe member itself from the fluid piping member when removing the tubular window member as in the past.

Preferably, the holding member is slidably assembled to the pipe member body in the direction of the long-side axis between the holding position and the release position, and the tubular window member is provided when the holding member is located in the release. In the state of position, it can be displaced between the assembly position assembled in the pipe member body, and the direction from the assembly position to the long axis to release the communication between the first passage and the second passage. In the disconnected position, the tubular window member can be removed from the pipe member body through the lateral opening at the disconnected position.

Preferably, the tube member main body includes a cylindrical front portion and a rear portion, an intermediate portion between the front portion and the rear portion, and the lateral opening portion is formed in the intermediate portion. The window member is integrated with the pipe member body in the direction of the long-side axis at the assembly position, and is sealedly engaged with the front portion. The holding member is a cylindrical member having a third passage, and The third passage is the flow path of the pipe member that is configured to be hermetically engaged with the tubular window member and the rear portion while maintaining the position, together with the first passage and the second passage.

In addition, the holding member is detachable from the pipe member body through the side opening in a state where the tubular window member is removed from the pipe member body.

With such a structure, it becomes easy to wash or exchange a holding member.

Preferably, the holding member has a protruding portion protruding radially outward from an outer peripheral surface of the holding member, the tube member body has a receiving recess that receives the protruding portion, and the holding member is located at the holding position. When the tube member body is rotatable about the long-side axis as a center, the protrusion-shaped portion can be turned on one side when it is located at an integrated rotation position where the protrusion is integrated with the receiving recess in the direction of the long-side axis. The receiving side of the receiving recess is displaced to the released position, and when it is not located in the integrated rotation position, the protruding portion interferes with the tube member body and cannot be displaced to the released position.

With the above-mentioned structure, the holding member is staggered from the integrated rotation position in advance, thereby preventing the holding member from being erroneously displaced from the holding position to the released position.

Preferably, the projecting portion has a locking extension portion extending along the outer peripheral surface of the pipe member body, within the outer peripheral surface of the pipe member body and the locking extension portion facing the outer peripheral surface. One side of the side is provided with a locking protrusion, and the other is provided with a locking recess. When the holding member rotates from the integrated rotation position to the locked rotation position at the holding position, the locking protrusion and the locking recess are formed. It engages and suppresses rotation of the holding member.

Instead of the above-mentioned structure, the protruding portion is provided with a locking projection on a sliding engagement surface slidingly engaged with the tubular window member, and the tubular window member has a locking recess receiving the locking projection, and the holding When the member is rotated from the integrated rotation position to the locked rotation position at the holding position, the locking protrusion and the locking recess are engaged to suppress the rotation of the holding member.

In this case, a flexible portion having flexibility in a direction of the long-side axis may be provided on the sliding engagement surface of the holding member, and the locking protrusion is provided on the flexible portion.

With the above-mentioned structure, it is possible to prevent the holding member from rotating from the locked rotation position toward the integrated rotation position by mistake, so that it is possible to surely prevent the holding member from being erroneously displaced to the released position.

Preferably, the pipe member main body has a guide surface formed on a side edge of the lateral opening portion and extending in a direction of the long side axis, and the tubular window member has a radial direction from an outer peripheral surface of the tubular window member. When the guide portion protruding from the outside is inserted into the first passage from the lateral opening portion to the communication release position, the guide portion is brought into contact with the guide surface to make the tubular window The member becomes the direction of the long side axis with respect to the pipe member body The integrated position causes the guide portion to slide on the guide surface when the tubular window member is displaced from the communication release position to the assembly position.

With the structure as described above, alignment is facilitated when the tubular window member is mounted on the pipe member body.

Preferably, it may further include a flow-viewing member disposed in the second passage of the tubular window member and displaced by a fluid flowing in the flow path.

Specifically, the flow-viewing member is a blade member attached to the tubular window member so as to be rotatable in a circumferential direction with respect to the long-side axis, and can be removed from the pipe member body together with the tubular window member.

By having such a flow-viewing member, it is easy to visually check whether or not a fluid flows in the flow path of the pipe member. Moreover, since the blade members are also removed together, it is easy to clean or exchange the blade members.

Preferably, the tubular window member has an outer peripheral surface of the window which is exposed to the outside when assembled in the main body of the pipe member, and an inner peripheral surface of the window which is located on the inner side in the radial direction of the outer peripheral surface of the window, and the inside of the second passage is Visually visible through the outer peripheral surface of the window and the inner peripheral surface of the window. The outer peripheral surface of the window is shaped so that the center of curvature of the outer peripheral surface of the window is located between the center of curvature of the inner peripheral surface of the window and the outer peripheral surface of the window. . Specifically, the cross-sections of the outer peripheral surface of the window and the inner peripheral surface of the window may each have an arc shape.

By forming the outer peripheral surface of the window and the inner peripheral surface of the window as described above, the blade member disposed in the tubular window member can be seen to be enlarged, and the rotation of the blade member can be more easily confirmed.

Preferably, the side opening portion has first and second side opening portions formed at opposite positions in a radial direction of the first passage, and the tubular window member passes through the first and second sides regardless of Any one of the square openings can be mounted on the pipe member body.

If there is only one side opening, when the pipe member is installed between the fluid piping members, it may be difficult to install and remove the tubular window member because the side opening faces the wall side. By providing two side openings at positions facing each other in the radial direction, the possibility of this state can be reduced.

Hereinafter, embodiments of the pipe member according to the present invention will be described based on the attached drawings.

The pipe member 100 according to the first embodiment of the present invention includes a pipe member body 102 to which a fluid pipe member (not shown) is connected at both ends, as shown in FIGS. 1 to 4, and is attached to the pipe member. The tubular window member 104 and the holding member 106 of the body 102 and the blade member 108 attached to the tubular window member 104. The pipe member 100 is a part of the fluid piping which is assembled between the fluid piping members. The tubular window member 104 is composed of a transparent material as a whole, and the tubular window member 104 and the blade member 108 constitute the flow visual member 110. The blade member 108 disposed inside the tubular window member 104 is visible from the outside through the transparent tubular window member 104. The blade member 108 is rotated by the fluid flow in the flow path 112 of the tube member 100, and the rotation of the blade member 108 is visually observed through the transparent tubular window member 104, thereby confirming whether or not the fluid flows in the flow path 112. .

The pipe member body 102 is formed by a cylindrical front portion 114, a cylindrical rear portion 116, and an intermediate portion 118 therebetween. As shown in FIG. 5, the pipe member body 102 is a first passage 124 defining a front opening 120 extending from a front opening 120 of a front portion 114 to a rear opening 122 of a rear portion 116. A female screw portion 126 for fixing the fluid piping member is formed in the front portion 114 and the rear portion 116, respectively. Further, as shown in FIG. 2, the middle portion 118 includes two pillar portions 128 that connect the front portion 114 and the rear portion 116, and the pillar portions 128 are formed to face each other in the radial direction of the first passage 124. The first side opening portion 130 and the second side opening portion 132. The side openings 130 and 132 are opened to the long side axis L of the first passage 124 so as to communicate from the side to the first passage 124. The rear portion 116 and the intermediate portion 118 are formed as an integral member, and the front portion 114 is a different member from the rear portion 116 and the intermediate portion 118, and is mounted so as to be rotatable about the middle portion 118 about the long-side axis L. With the above-mentioned structure, in a state where one of the female screw portions 126 of the front portion 114 and the rear portion 116 has a fixed fluid piping member, when fixing the fluid piping member to the other female screw portion 126, the The other side rotates the fluid piping member to be installed next, so that the other female screw portion 126 can be fixed to the piping flow path member without rotating the piping flow path member. In addition, when the user visually views the blade member 108 through the tubular window member 104, the rotation direction position of the intermediate portion 118 may be changed so that the pillar portion 128 is positioned at a position that does not obstruct the view.

The tubular window member 104 has a cylindrical peripheral wall portion 134, and as shown in FIG. 5, a second passage 136 is defined on the inner side thereof. Further, as shown in FIG. 6, a shaft support portion 140 extending in a radial direction across the second passage 136 is provided at a front end portion 138 of the peripheral wall portion 134, and a long side is provided near the center of the shaft support portion 140. The direction of the axis L is toward the rotation shaft 142 extending rearward (leftward in the drawing). The tubular window member 104 is assembled to the pipe member body 102 in an assembled state, and the front end portion 138 of the peripheral wall portion 134 is inserted into the inside of the front portion 114 of the pipe member body 102 and is located in the direction of the long side axis L with the pipe. The position where the component body 102 is integrated. The front end portion 138 is hermetically engaged with the inner peripheral surface 114 a of the front portion 114, and the second passage 136 of the tubular window member 104 is in a state in which the front portion 114 of the pipe member body 102 communicates with the first passage 124.

The blade member 108 includes a main body portion 144 extending in the direction of the long-side axis L, and two blades 146 formed in a spiral shape on the outer peripheral surface 144 a of the main body portion 144. The main body portion 144 of the blade member 108 is a cylindrical shaft holding portion 144 that holds a rotating shaft 142 of the tubular window member 104. The shaft holding portion (body portion) 144 holds the rotation shaft 142 of the tubular window member 104 so as to be relatively rotatable. Thereby, the blade member 108 can rotate the rotation axis 142 with the rotation center axis C as a center. In the assembled state, as shown in FIG. 5 and FIG. 6, the blade member 108 is in a state where the entire blade member 108 is positioned in the second passage 136 of the tubular window member 104.

The holding member 106 has a cylindrical peripheral wall portion 148 and, as shown in FIG. 5, a third passage 150 is defined on the inner side thereof. In addition, a blade support portion 152 extending in a radial direction across the third passage 150 is provided on a front end surface 148 a of the peripheral wall portion 148, and a rear end portion 154 of the blade member 108 is supported from the rear by the blade support portion 152. . In the assembled state, the holding member 106 has its rear end portion 156 inserted into the rear portion 116 of the pipe member body 102 and is located in a position integrated with the pipe member body 102 in the direction of the long-side axis L. The rear end portion 156 is hermetically engaged with the inner peripheral surface 116 a of the rear portion 116 of the pipe member body 102, and the front end portion 158 is hermetically engaged with the rear end portion 160 of the tubular window member 104. Thereby, the third passage 150 of the holding member 106 communicates with the first passage 124 and the second passage 136, and together with the first passage 124 and the second passage 136, constitutes the flow path 112 of the pipe member 100. As shown in FIGS. 1 and 2, the holding member 106 further includes two protruding portions 162 protruding outward in the radial direction from the outer peripheral surface 148 b of the peripheral wall portion 148. The outer peripheral surface 102a extends to engage the extension portion 164. A through hole (locking recessed portion) 166 penetrating to the inner side surface of the locking extension portion 164 is provided. The through hole 166 is a ball (card) that is pressed into the outer peripheral surface 102a of the pipe member body 102 in the assembled state. A part of the protrusion 168 is received, and the position of the holding member 106 in the rotation direction of the pipe member body 102 is held. As described later, the holding member 106 can slide about the rotation direction of the pipe member body 102 in the direction of the long-side axis L and around the long-side axis L, as shown in FIGS. 1, 3, and 4. When the through-hole 166 of the portion 164 locks the ball 168 to the locked rotation position, the through-hole 166 and the ball 168 are engaged to suppress the rotation in the circumferential direction, and the protrusion 162 acts on the pipe member body 102. The holding position that cannot be held from the state where the tubular window member 104 is assembled to the pipe member main body 102 interferes with displacement in the direction of the long-side axis L toward the rear. In addition, the through holes 166 as the locking recesses and the balls 168 as the locking protrusions may be oppositely arranged, and a mechanism other than the through holes 166 and the balls 168 may be engaged with each other.

The pipe member 100 can be attached to and detached from the tubular window member 104 in a state where the fluid pipe member is connected and fixed to the pipe member body 102 and assembled in the fluid pipe. The procedure for removing the tubular window member 104 is as follows.

First, in the assembled state of FIG. 4, a force in a rotational direction is applied to the holding member 106 to the extent that the engagement between the through hole 166 of the holding member 106 engaged with each other and the ball 168 of the pipe member body 102 can be released. To release the engagement, and rotate the holding member 106 from the locked rotation position in FIG. 4 to the integrated rotation position in FIG. 7. In this integrated rotation position, the protruding portion 162 of the holding member 106 is integrated in the direction of the long-side axis L with the receiving recess 170 formed at the rear portion 116 of the pipe member body 102. Next, the holding member 106 is displaced rearward from the holding position in FIG. 7 in the direction of the long-side axis L, and is positioned at the released position in FIG. 8. When the holding member 106 is in the released position, it becomes a position separated from the tubular window member 104, and the holding of the tubular window member 104 by the holding member 106 is released. Moreover, in the integrated rotation position, the process of displacing the holding member 106 from the holding position to the release position is such that the protruding portion 162 of the holding member 106 is received into the receiving recess 170 of the pipe member body 102, thereby causing the holding member 106 Displaceable to liberated position. On the other hand, if the holding member 106 is not positioned in the integrated rotation position, even if the holding member 106 is to be moved backward from the holding position toward the release position, the protruding portion 162 of the holding member 106 and the rear portion of the pipe member body 102 will be caused. The interference of 116 prevents the holding member 106 from being displaced to the released position. Next, the tubular window member 104 is pulled rearward from the assembly position of FIG. 8 assembled to the pipe member body 102 to be pulled out from the front portion 114 of the pipe member body 102 and is located at the communication release position of FIG. 9. This communication release position is to release the seal engagement between the tubular window member 104 and the front portion 114 of the pipe member body 102 and also release the communication between the first passage 124 and the second passage 136. The tubular window member 104 in the disconnected position is pulled out through the first lateral opening 130 (FIGS. 1 to 3) of the pipe member body 102, thereby causing the tubular window member 104 and the blade member 108 installed therein. Removed together from the pipe member body 102 (Fig. 10). As described above, when the tubular member 100 is removed, it is not necessary to remove the pipe member body 102 from the fluid piping member.

When the removed tubular window member 104 is installed, the above-mentioned removal procedure is reversed. The tubular window member 104 can be inserted into the pipe member body 102 to be assembled through either the first side opening portion 130 or the second side opening portion 132. As can be seen from FIG. 2, a guide surface 172 extending in the direction of the long-side axis L is formed on the pillar portion 128 serving as the side edges of the first and second lateral openings 130 and 132 of the pipe member body 102. A guide portion 174 is formed on the tubular window member 104 so as to protrude from the outer peripheral surface 104b. When the tubular window member 104 is inserted into the pipe member body 102 through any of the first and second lateral openings 130 and 132, the guide portion 174 of the tubular window member 104 comes into contact with the guide of the pipe member body 102. The lead surfaces 172 make the tubular window member 104 and the pipe member body 102 in a position integrated in the direction of the long-side axis L and are coaxial with each other. The guide surface 172 and the guide portion 174 prevent the tubular window member 104 from being detached from the side openings 130 and 132 on the opposite side of the side openings 130 and 132 that pass through the tubular window member 104 and have a tubular shape. The alignment of the window member 104 and the pipe member body 102 is also facilitated. In addition, when the tubular window member 104 is displaced from the disconnected position in FIG. 9 to the assembled position in FIG. 8, the guide portion 174 slides on the guide surface 172 to guide the tubular window member 104 to an appropriate position. .

In the pipe member 100, in a state where the tubular window member 104 is detached from the pipe member body 102 (FIG. 10), the holding member 106 is moved forward as shown in FIG. 11 (to the right as viewed in the drawing). ) To be pulled out from the rear portion 116 of the pipe member body 102 and further removed from the pipe member body 102 through the side openings 130 and 132 (FIG. 12).

When the tubular window member 104 is removed from the pipe member body 102, a blade member 108 is attached to the inside of the tubular window member 104. As shown in FIG. 13, a first locking portion 178 is formed on the rear end portion 176 of the rotation shaft 142 of the tubular window member 104 so as to protrude outward in the radial direction. In addition, the rear end portion 176 of the rotation shaft 142 where the first locking portion 178 is formed is divided into two by the slit 180 so as to have flexibility in the radial direction. The shaft holding portion 144 of the blade member 108 is formed with a second locking portion 182 protruding radially inward from the inner peripheral surface 144b thereof. As described above, the blade member 108 holds the rotation shaft 142 by the shaft holding portion 144, so that the tubular window member 104 can be rotated around the rotation center axis C, and the rotation shaft 142 can be moved along the rotation center axis. C to shift. The blade member 108 is as shown in FIG. 6, and the front end portion 184 of the blade member 108 can be freely displaced from the first position abutting on the shaft support portion 140 of the tubular window member 104 to the first position as shown in FIG. 13. The second position where the first locking portion 178 is engaged with the second locking portion 182. That is, the blade member 108 is displaced to the second position without being particularly stressed, but it is not displaced by the force of the weight of the blade member 108, so that it can be prevented from falling off naturally from the tubular window member 104 and falling. . The blade member 108 is in a state where the rear end portion 154 of the blade member 108 projects from the rear end surface 104 a of the tubular window member 104 in the second position. If the rear end portion 154 of the blade member 108 in the second position is grasped and pulled further rearward, the first locking portion 178 of the rotating shaft 142 will be moved in the radial direction by the second locking portion 182 of the shaft holding portion 144. Pressing the inside causes the rear end portion 176 of the rotating shaft 142 divided into two to flex inward in the radial direction, thereby releasing the engagement between the first locking portion 178 and the second locking portion 182. That is, the first engagement portion 178 and the second engagement portion 182 are configured to engage with each other, and the blade member 108 is pulled with a force of a certain degree or more to disengage the engagement and the blade member 108 can be moved from the second position. Move further backward. As long as the blade member 108 is pulled in this way, it can be displaced to the rear beyond the second position, and can be easily removed from the tubular window member 104 as shown in FIG. 14. By removing the blade member 108 in this way, the inner peripheral surface 104c of the tubular window member 104 can be easily cleaned. When attaching the blade member 108 to the tubular window member 104, the rotary shaft 142 is inserted into the shaft holding portion 144, the blade member 108 is pressed into the tubular window member 104, and the second locking of the blade member 108 is performed. The first locking portion 178 of the rotating shaft 142 is bent inward in the radial direction so that the second locking portion 182 crosses the first locking portion 178. As described above, the blade member 108 can be easily mounted.

When attaching and detaching the tubular window member 104 to and from the pipe member body 102, the holding member 106 is positioned in the released position as shown in Figs. 9 and 10. In this released position, as shown in FIG. 15, the blade supporting portion 152 of the holding member 106 is formed in a direction toward the first lateral opening portion 130 and the second lateral opening portion 132 (left-right direction as viewed in the drawing). . As described above, the blade member 108 is held in the first position by being supported by the blade support portion 152 in the assembled state, and can be freely displaced to the second position without the support of the blade support portion 152. During the process of installing or removing the tubular window member 104, if the blade member 108 is displaced from the first position toward the second position, the rear end portion 154 of the blade member 108 may catch on the holding member 106. In this pipe member 100, the blade support portion 152 is directed toward the first and second lateral openings 130, 132, that is, the tubular window member 104 passes through the first and second lateral openings 130, 132. During installation and removal, the blade member 108 extends along the direction of the moving direction of the tubular window member 104, so the blade member 108 is continuously supported by the blade support portion 152 during the installation and removal. This prevents the blade member 108 from being displaced to the second position side and being caught inside the holding member 106.

As shown in FIG. 16, the pipe member 200 according to the second embodiment of the present invention is mainly different from the pipe member 100 according to the first embodiment mainly in the structure of the vane member 208 and the structure holding it. The flow visual member 210 of the pipe member 200 is provided with a shaft holding portion 244 fixed to the peripheral wall portion 234 of the tubular window member 204, and a body portion 242 of the blade member 208 constitutes a rotation shaft 242. The shaft holding portion 244 of the tubular window member 204 includes a first locking portion 278 protruding radially inward from the inner peripheral surface 244 b thereof. In addition, the rotation shaft (main body portion) 242 of the blade member 208 includes a second locking portion 282 protruding radially outward from the front end portion 284. In the illustrated assembled state, the segment portion 288 of the front end portion 284 of the rotation shaft 242 abuts or comes close to the rear end surface 290 of the shaft holding portion 244, and the rear end surface 292 of the rotation shaft 242 is a blade support portion of the held member 206. Supported by 252. Thereby, the position of the blade member 208 in the direction of the rotation center axis C is maintained. The rear end surface 292 of the rotation shaft 242 is conical, and a conical recess 294 is formed in the blade support portion 252 to cooperate with the conical rear end surface 292 of the rotation shaft 242. The rear end surface 292 of the rotation shaft 242 is fixed by the recess 294. Position in the radial direction so that the rotation center axis C does not shift. In a state where the tubular window member 204 has been removed from the pipe member body 202, the blade member 208 can be freely displaced from the first position in FIG. 16 to a position where the second locking portion 282 abuts against the first of the shaft holding portion 244. 2nd position of 1 latching part 278. At the second position, the portion protruding from the rear end surface 204a of the tubular window member 204 of the blade member 208 is grasped and pulled, thereby releasing the engagement between the first locking portion 278 and the second locking portion 282, and the The blade member 208 is removed from the tubular window member 204. In this embodiment, since the tubular window member 204 does not have a rotation axis, the interior of the tubular window member 204 becomes wide and empty after the blade member 208 is removed. Therefore, it is easier to clean the inner peripheral surface of the tubular window member 204. 204c.

As shown in FIG. 17, the pipe member 300 according to the third embodiment of the present invention includes a C-shaped locking member 396 that is detachably mounted on the outer peripheral surface 302 a of the pipe member body 302. The locking member 396 is attached to the pipe member body 302 with the holding member 306 in the holding position, thereby causing the protruding portion 362 of the holding member 306 to interfere with the locking member 396 and preventing the holding member 306 from going backward from the holding position. Displacement. That is, in a state where the lock member 396 is installed, the holding member 306 cannot be displaced to the release position, thereby preventing the flow path from being disconnected by mistake. When such a locking member 396 is used, the holding member 306 does not need to be rotatable in the circumferential direction.

Although the pipe member 400 according to the fourth embodiment of the present invention has a structure that is particularly close to the pipe member 200 according to the second embodiment, as shown in FIGS. 18-24, the shape of each member is different.

As shown in FIGS. 19 and 20, a flat holding surface 404 d is formed on the outer peripheral surface 404 b of the tubular window member 404, and when the tube member body 402 is assembled, the holding surface 404 d is a pillar portion 428 of the tube member body 402. (Fig. 18) Hold by surface contact. In addition, the guide portion 474 protruding from the outer peripheral surface 404b of the peripheral wall portion 434 is a plate shape extending in the direction of the long-side axis L on the outer peripheral surface 404b, and becomes a guide surface 472 of the pipe member body 402 to be wider. Come in contact. With the structure described above, the tubular window member 404 can be attached to the pipe member body 402 in a more stable state.

As shown in FIGS. 20 and 21, the tubular window member 404 includes a shaft holding portion 444 extending from the peripheral wall portion 434 to the center of the second passage 436. This shaft holding portion 444 is different from the shaft holding portion 244 of the second embodiment shown in FIG. 16 and has a unilateral holding structure. With such a single-sided holding structure, cleaning of the inner peripheral surface 404c of the tubular window member 404 is easier, and the resistance of the fluid flowing in the flow path 412 is reduced.

In addition, as shown in FIG. 22, the tubular window member 404 includes a window outer peripheral surface 405 a that is exposed to the outside when assembled in the pipe member body 402, and is located inside the window outer peripheral surface 405 a in the radial direction to define a second passage 436. The inner peripheral surface 405b of the window, the blade member 408 disposed in the second passage 436, can be visually seen through the outer peripheral surface 405a and the inner peripheral surface 405b of the window. As shown in FIG. 22, the window inner peripheral surface 405 b is a part of the inner peripheral surface 404 c having a circular cross section. In the tubular window member 404 of this embodiment, the outer peripheral surface 405a of the window having an arc-shaped cross section is formed so that its curvature center P1 is located between the center of curvature P2 of the inner peripheral surface 405b of the window and the outer peripheral surface 405a of the window. Therefore, the wall thickness of the peripheral wall portion 434 in the radial direction is a shape that is thickest at the center portion of the window outer peripheral surface 405 a and gradually becomes thinner toward the end portion. 22 shows a virtual circle V passing through an arc of the window outer peripheral surface 405a by a dotted line. By constituting a lens with such a window outer peripheral surface 405a and a window inner peripheral surface 405b, the blade member 408 in the second passage 436 looks larger than the above embodiment when viewed from the outside. This improves the visibility of the blade member 408. Moreover, the cross section of the window outer peripheral surface 405a and the window inner peripheral surface 405b does not necessarily have to be circular or circular, and may be non-circular surfaces.

The blade member 408 includes a main body portion 442 that constitutes a rotation shaft that is rotatably held by the shaft holding portion 444 of the tubular window member 404, and a first blade 446a and a second blade 446b, which are disposed at The body portion 442 has an outer peripheral surface 442a, and a first fluid resistance portion 447a and a second fluid resistance portion 447b are disposed on the outer peripheral surface 442a between the first and second blades 446a and 446b. The rotation shaft (body portion) 442 of the blade member 408 has a step portion 488 facing the rear at the front end portion 484. In the assembled state of FIG. 21, the segment portion 488 of the rotation shaft 442 abuts or approaches the locking portion 478 of the shaft holding portion 444, and the rear end surface 492 of the rotation shaft 442 is supported by the blade support portion 452 of the holding member 406. As a result, the position in the direction of the rotation center axis C is maintained. In a state where the tubular window member 404 is removed from the pipe member body 402, the blade member 408 can be removed from the tubular window member 404 by pulling on the side of the end surface 492 behind the rotation shaft 442. Alternatively, the blade member 408 is removed from the tubular window member 404 by pressing the front end portion 484 of the rotating shaft 442 protruding forward from the shaft holding portion 444 of the tubular window member 404 with a hand or a thin rod-shaped member or the like.

As shown in FIG. 24, the first and second fluid resistance portions 447a and 447b of the blade member 408 are opposed to each other from the outer peripheral surface 442a of the main body portion 442 along a plane F including the rotation center axis C ( It is a flat plate shape protruding from the top as viewed in FIG. 24, and as shown in FIG. 23, extending in the direction of the rotation center axis C along the one plane F (left-right direction as viewed in FIG. 23). . The first and second blades 446a and 446b are located on opposite sides of the one plane F, and are formed in a direction substantially perpendicular to the one plane F from the outer peripheral surface 442a of the body portion 442 (see FIG. 24). Seen from left to right). The first blade 446a has a flat plate shape that extends linearly obliquely to the rotation center axis C when the one plane F is viewed from the vertical direction (that is, viewed from the direction of FIG. 23). As a result, the first blade 446a is formed with a surface inclined to the rotation center axis C. When the fluid flows in the direction of the long-side axis L (that is, the direction of the rotation center axis C), the fluid is generated in the blade member 408 by the fluid. Force in the direction of rotation. The second blade 446b also has the same shape as the first blade 446a. When the blade member 408 has a fluid flowing in the flow path 412, the first and second blades 446a and 446b are rotated around the rotation center axis C by a force in the direction of rotation received by the fluid. On the other hand, the first and second fluid resistance portions 447a and 447b extend in the direction of the rotation center axis C as described above, and do not constitute a surface inclined to the rotation center axis C. Therefore, the blade member 408 is in a stationary state. In the first and second fluid resistance portions 447a and 447b, there is no force acting in the direction of rotation due to the fluid. However, when the blade member 408 is rotated, the first and second fluid resistance portions 447a and 447b receive a resistance force opposite to the rotation direction by the fluid. Therefore, the first and second fluid resistance portions 447a and 447b cancel a part of the first and second blades 446a and 446b in the direction of the rotation force received by the fluid, so that the blade member 408 serves as the entire free fluid. The resultant force in the direction of rotation received is reduced, and the function of suppressing an increase in the rotation speed of the blade member 408 is exhibited. In addition, the fluid resistance is proportional to the square of the relative velocity between the object and the fluid. Therefore, if the velocity of the flowing fluid is increased and the rotation speed of the blade member 408 is increased, the first and second fluid resistance portions 447a and 447b are formed by The resistance to fluids will increase. That is, the effect of suppressing the rotation speed by the first and second fluid resistance portions 447a and 447b is that the faster the rotation speed of the blade member 408 is, the larger it becomes. In addition, the shapes of the first and second fluid resistance portions 447a and 447b do not necessarily have to be planar shapes, but they may also be cylindrical or corner pillar-like shapes extending outward in the radial direction, or they may be formed in such a shape. The directions of the rotation center axis C are plural in parallel. In addition, the fluid resistance portion may be provided only on one side of the rotation shaft 442.

The blade member 408 is a two-color molded member that is resin-molded using a red first resin material and a yellow second resin material. A mold (not shown) for forming the blade member 408 is composed of two molds divided by one plane F shown in FIG. 24. That is, the formed blade member 408 is detached from the mold in the vertical direction with respect to the one plane F. Here, the blade member 408, in particular, the first and second blades 446a and 446b and the first and second fluid resistance portions 447a and 447b are in a direction in which the mold is separated (left-right direction as viewed in FIG. 24). The shape can be caught, so it can be easily released from the mold. The blade member 408 is formed by injecting a first resin material from a mold on the side corresponding to the first blade 446a, and injecting a second resin material from a mold on the side corresponding to the second blade 446b. Therefore, the formed blade member 408 is formed by using the one plane F as a boundary, and the left side viewed from FIG. 24 is formed by the first red resin material, and the right side is formed by the yellow second resin material. That is, the blade member 408 is a two-color member that is half red and half yellow. As described above, the blade member 408 has two different colors, whereby the rotation of the blade member 408 can be easily visually recognized by the change in color. In this embodiment, two colors of red and yellow are used, but other colors may be combined. In addition, as described above, in order to perform such a two-color molding mold, a mold that is divided into one plane F can be used. Since the cutting of the mold can be simplified, mold production is relatively easy.

The first and second fluid resistance portions 447a and 447b of the blade member 408 are provided mainly to suppress an increase in the rotation speed of the blade member 408 as described above, but they also bear a tubular window to which the blade member 408 is mounted. The member 404 performs the task of maintaining the posture of the blade member 408 when it is assembled to the pipe member body 402. That is, in a state where the tubular window member 404 is removed, the rotation axis 442 of the blade member 408 is held in a unilateral state by the shaft holding portion 444 of the tubular window member 404. Therefore, the blade member 408 is easy to face the tubular window member 404. Inclined, but by arranging the first and second fluid resistance portions 447a, 447b between the first and second blades 446a, 446b, these portions are engaged with the inner peripheral surface 404c of the tubular window member 404, and The inclination of the blade member 408 is suppressed. In particular, the blade member 408 of this embodiment has a shape in which the first and second blades 446a and 446b extend only to the left and right but not to the upper and lower sides when viewed in FIG. Therefore, when the first and second fluid resistance portions 447a and 447b are not present, the blade member 408 inclines substantially upward and downward. In the case where the blade member 408 is tilted greatly, when the tubular window member 404 is assembled to the pipe member body 402, the rear end surface 492 of the rotation shaft 442 cannot fit into the recessed portion 494 of the blade support portion 452 (FIG. 21). In contrast, as described above, the inclination of the blade member 408 with respect to the tubular window member 404 is converged within a predetermined range by the first and second fluid resistance portions 447a and 447b, thereby making the rotation axis 442 of the blade member 408 The rear end surface 492 is appropriately fitted and held in a conical recess 494 of the holding member 406. That is, the inclination of the blade member 408 is suppressed by the first and second fluid resistance portions 447a and 447b, so that the installation work of the tubular window member 404 can be easily performed while the blade member 408 is attached.

In the holding member 406 of the present embodiment, the surface facing the side of the tubular window member 404 of the protruding portion 462 is a sliding engagement surface 462a that slides with the rear end surface 404a of the tubular window member 404, and on this sliding engagement surface 462a is provided with a flexible portion 463 having flexibility in the direction of the long-side axis L. A locking protrusion 466 is formed in the flexible portion 463. In the assembled state, the locking protrusion 466 is received by the locking recess 498 formed on the end surface 404a behind the tubular window member 404, so that the position of the holding member 406 with respect to the tubular window member 404 in the rotation direction is held. As shown in FIG. 18, when the holding member 406 is locked in the locking recessed portion 498 and is in the locked rotation position, the holding member 406 is formed by the engagement between the locking protrusion 466 and the locking recessed portion 498. Suppresses rotation in the circumferential direction. When the holding member 406 rotates the pipe member body 402 and the tubular window member 404 from the locked rotation position, the locking protrusion 466 is detached from the locking recess 498 and is formed around the end surface 404a behind the tubular window member 404. The recess 499 moves inside. The locking protrusion 466 does not contact the tubular window member 404 when it is located in the peripheral recessed portion 499. In addition, an inclined surface 462b is formed on the rear surface of the protruding portion 462, and when the holding member 406 is rotated from the integrated rotation position to the locked rotation position, it is difficult for the protruding portion 462 to be caught in the receiving recess of the pipe member body 402 470 angle.

The pipe member 500 according to the fifth embodiment of the present invention is as shown in FIG. 25, and the pipe member 400 according to the fourth embodiment is different in the holding form of the blade member 508. Specifically, each of the front end surface 591 and the rear end surface 592 of the rotation shaft 542 of the blade member 508 has a tapered shape, and the shaft holding portion 544 of the tubular window member 504 has a cover shape. In addition, a blade support portion 552 of the holding member 506 is formed. There are conical recesses 594. The tapered angle of the front end surface 591 of the blade member 508 is sharper than the tapered angle of the shaft holding portion 544 of the tubular window member 504, and the tapered angle of the rear end surface 592 of the blade member 508 is also greater than the conical concave portion of the holding member 506. The cone angle of 594 is also acute. Therefore, the front end surface 591 and the rear end surface 592 of the blade member 508 are basically in contact with the shaft holding portion 544 and the conical recessed portion 594 at the front end portions. Accordingly, the contact area between the rotation shaft 542 of the blade member 508 and the shaft holding portion 544 and the blade support portion 552 is reduced, and the friction resistance during rotation is reduced.

The pipe member 600 according to the sixth embodiment of the present invention has a structure similar to that of the pipe members 400 and 500 according to the fourth and fifth embodiments, as shown in FIGS. 26 to 30. The 500 has the following differences.

In the tubular window member 604 of the pipe member 600, a holding portion 675 is formed between the window outer peripheral surface 605a and the guide portion 674. In the fourth embodiment, when the tubular window member 404 is taken out of the pipe member body 402, the tubular window member 404 is pushed out from the rear side, but when the pipe member 400 is installed in a narrow place, etc., it has a finger There is a possibility that it may not reach the rear side of the tubular window member 404. In contrast, the tubular window member 604 of the pipe member 600 is formed with the above-mentioned holding portion 675. Therefore, even in such a situation, the tubular window member 604 can be pulled by grasping the holding portion 675 to thereby easily pull the tubular window. The member 604 is taken out from the pipe member body 602.

As shown in FIG. 28, the locking protrusion 666 of the holding member 606 is triangular. In addition, the protruding portion 662 of the holding member 606 extends long outward in the radial direction, so that the operation of the holding member 606 is facilitated.

As shown in FIG. 29, the first and second fluid resistance portions 647 a and 647 b of the blade member 608 are long in the direction of the long-side axis L and have a shape close to a rectangle. Thereby, the area of the 1st and 2nd fluid resistance parts 647a and 647b becomes large. The first and second blades 646a and 646b also increase the area in the same manner. Accordingly, when viewed from the outside of the tubular window member 604, the visibility of the blade member 608, particularly during rotation, can be improved. In addition, the resistance to the fluid flowing in the flow path 612 is increased, and the blade member 608 can be rotated even with a small flow rate. A groove 693 is formed near the end surface 692 behind the blade member 608. When the blade member 608 is removed from the tubular window member 604, the groove 693 is hooked with a finger, thereby making it easier to remove the blade member 608. The structure of the shaft holding portion 644 of the tubular window member 604 for holding the rotation shaft 642 of the blade member 608 is similar to the tube member 500 of the fifth embodiment shown in FIG. 25, but the support end face 645 of the shaft holding portion 644 is The long side axis L is different in that it is a substantially vertical plane. Thereby, the tapered front end surface 691 of the blade member 608 often makes point contact with the support end surface 645, and when the blade member 608 rotates, the frictional resistance between the front end surface 691 and the support end surface 645 does not become large.

As shown in FIG. 30, the window outer peripheral surface 605a of the tubular window member 604 as viewed from the left is a circular arc-shaped portion 605a-1 and a linear portion 605a-2 extending straight from there to the holding surface 604d. It is formed into a shape without depression from the window outer peripheral surface 605a to the holding surface 604d. Accordingly, when the tubular window member 604 is mounted on the pipe member body 602, the tubular window member 604 can be smoothly inserted into the pipe member body 602 without being caught on the pillar portion 628 of the pipe member body 602.

As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment. For example, tubular window members are not It is necessary that the entire body is made of a transparent material. As long as the blade member in the flow path can be visually assembled in the state of being assembled in the pipe member body, only a part of the transparent material may be made of the transparent material. If it is, it can also be colored or non-completely transparent. In addition, as the flow visual member for indicating the fluid flow in the flow path, instead of being a blade member, another member such as a fluid resistive body which is pushed by the fluid and displaced in the flow direction may be used. In addition, when the target fluid contains visible solids, bubbles, etc., the presence or absence of fluid flow can be confirmed by observing these, so it is not necessary to include a flow visual member such as a blade member. Furthermore, in the above-mentioned embodiment, although the presence or absence of fluid flow is confirmed by the rotation of the blade member, it may be a flow rate sensor that measures the flow rate of the fluid by the rotation speed of the blade member. In addition, as a structure for preventing the holding member from being erroneously displaced from the holding position to the released position, the screw may be screw-fixed to the pipe member body so that the screw passes through the locking extension of the holding member. At this time, the retaining member may be fixed by screws after being set at the locked rotation position, or may be fixed by screws at the integrated rotation position.

The structures of the respective embodiments can be freely combined with each other. For example, the blades of the blade members of the first to third embodiments may be shaped like the first and second blades of the blade members of the fourth to sixth embodiments. In addition, in the first to third embodiments, the blade member may be a two-color molded member, and the first and second fluid resistance portions may be provided. In addition, as in the fourth to sixth embodiments, the structure for suppressing rotation of the holding member of the first and second embodiments has a structure similar to that of the locking projection of the holding member and the locking recess of the tubular window member. Yes, conversely, the structures of the first and second embodiments may be adopted in the fourth to sixth embodiments. Similarly, the other components of each embodiment can be freely combined with each other.

100‧‧‧ tube components

102‧‧‧Pipe component body

102a‧‧‧outer surface

104‧‧‧ tubular window member

104a‧‧‧ rear face

104b‧‧‧outer surface

104c‧‧‧Inner peripheral surface

106‧‧‧ holding member

108‧‧‧ Blade members

110‧‧‧mobile visual components

112‧‧‧flow

114‧‧‧Front section

114a‧‧‧Inner peripheral surface

116‧‧‧Rear section

116a‧‧‧Inner peripheral surface

118‧‧‧ middle section

120‧‧‧ front opening

122‧‧‧ rear opening

124‧‧‧1st path

126‧‧‧female thread

128‧‧‧ pillar

130‧‧‧ 1st lateral opening

132‧‧‧ 2nd lateral opening

134‧‧‧ (of the tubular window member 104) peripheral wall portion

136‧‧‧Second Path

138‧‧‧ front end

140‧‧‧shaft support

142‧‧‧rotation axis

144‧‧‧shaft holding part (body part)

144a‧‧‧outer surface

144b‧‧‧Inner peripheral surface

146‧‧‧ Blade

148‧‧‧ (of the holding member 106) peripheral wall portion

148a‧‧‧front face

148b‧‧‧outer surface

150‧‧‧3rd lane

152‧‧‧blade support

154‧‧‧ (of blade member 108) rear end

156‧‧‧ (of holding member 106) rear end

158‧‧‧ (front of the holding member 106)

160‧‧‧ (of the tubular window member 104) rear end

162‧‧‧ protrusion

164‧‧‧Stop extension

166‧‧‧through hole

168‧‧‧ball

170‧‧‧ Receiving recess

172‧‧‧Guide plane

174‧‧‧Guide

176‧‧‧ (of the rotating shaft 142) rear end

178‧‧‧The first locking part

180‧‧‧Slit

182‧‧‧Second stopper

184‧‧‧ (front end of blade member 108)

200‧‧‧ tube components

202‧‧‧pipe body

204‧‧‧ tubular window member

204a‧‧‧ rear face

204c‧‧‧Inner peripheral surface

206‧‧‧ holding member

208‧‧‧ Blade member

210‧‧‧ Mobile visual components

234‧‧‧Zhou Bibei

242‧‧‧Rotary shaft (main body)

244‧‧‧shaft holding unit

244b‧‧‧Inner peripheral surface

252‧‧‧ Blade support

278‧‧‧The first locking part

282‧‧‧Second stopper

284‧‧‧Front end

288‧‧‧section

290‧‧‧ (of the shaft holding portion 244) rear face

292‧‧‧ (of rotating shaft 242) rear face

294‧‧‧conical recess

300‧‧‧ tube member

302‧‧‧pipe component body

302a‧‧‧outer surface

306‧‧‧ holding member

362‧‧‧ protrusion

396‧‧‧Locking member

400‧‧‧ tube components

402‧‧‧Pipe component body

404‧‧‧ tubular window member

404a‧‧‧ rear face

404b‧‧‧outer surface

404c‧‧‧Inner peripheral surface

404d‧‧‧ keep face

405a‧‧‧ Outside surface

405b‧‧‧Inner peripheral surface of window

406‧‧‧holding member

408‧‧‧blade member

412‧‧‧flow

428‧‧‧ pillar

434‧‧‧Zhou Bibei

436‧‧‧Second Access

438‧‧‧Front end

442‧‧‧rotation shaft (main body)

442a‧‧‧outer surface

444‧‧‧shaft holding unit

446a‧‧‧1st blade

446b‧‧‧ 2nd blade

447a‧‧‧The first fluid resistance part

447b‧‧‧Second fluid resistance

452‧‧‧ blade support

460‧‧‧ rear

462‧‧‧ protrusion

462a‧‧‧Sliding engagement surface

462b‧‧‧inclined

463‧‧‧Flexible

466‧‧‧ locking protrusion

470‧‧‧ Receiving recess

472‧‧‧Guide plane

474‧‧‧Guide

478‧‧‧Detent

484‧‧‧Front end

488‧‧‧section

492‧‧‧ rear face

494‧‧‧ recess

498‧‧‧locking recess

499‧‧‧ around recess

500‧‧‧ tube components

504‧‧‧ tubular window member

506‧‧‧ holding member

508‧‧‧ Blade member

542‧‧‧Rotary shaft

544‧‧‧shaft holding unit

552‧‧‧blade support

591‧‧‧ front face

592‧‧‧ rear face

594‧‧‧conical recess

600‧‧‧ tube components

602‧‧‧pipe component body

604‧‧‧ tubular window member

604d‧‧‧ holding surface

605a‧‧‧outside window

605a-1‧‧‧arc-shaped part

605a-2‧‧‧Straight part

606‧‧‧ holding member

608‧‧‧blade member

612‧‧‧flow

628‧‧‧ pillar

642‧‧‧rotation axis

644‧‧‧shaft holding unit

645‧‧‧Support face

646a‧‧‧1st blade

646b‧‧‧2nd blade

647a‧‧‧The first fluid resistance part

647b‧‧‧Second fluid resistance

662‧‧‧ protrusion

666‧‧‧ locking protrusion

674‧‧‧Guide

675‧‧‧holding department

691‧‧‧ front face

692‧‧‧ rear face

693‧‧‧ trench

L‧‧‧long side axis

C‧‧‧ rotation center axis

P1‧‧‧Curvature Center

P2‧‧‧Curvature Center

V‧‧‧Virtual Circle

F‧‧‧1 plane

FIG. 1 is a perspective view showing an assembled state of a pipe member according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the pipe member of FIG. 1. FIG. 3 is a top view of the pipe member of FIG. 1. FIG. 4 is a side view of the pipe member of FIG. 1. FIG. 5 is a sectional view taken along the line V-V in FIG. 3. FIG. 6 is a sectional view taken along the line VI-VI in FIG. 4. FIG. 7 is a first view showing the mounting and dismounting operations of the tubular window member of the pipe member of FIG. 1, and is a view showing a state where the holding member is positioned at the integrated rotation position. FIG. 8 is a second view showing the mounting and dismounting operations of the tubular window member of the pipe member of FIG. 1, and is a view showing a state in which the holding member is in a released position. FIG. 9 is a third view showing the mounting and dismounting operations of the tubular window member of the pipe member of FIG. 1, and is a view showing a state where the tubular window member is in the disconnected position. FIG. 10 is a fourth view showing the mounting and dismounting operations of the tubular window member of the pipe member of FIG. 1, and is a view showing a state where the tubular window member is removed from the pipe member body. FIG. 11 is a fifth view showing the mounting and dismounting operations of the tubular window member of the pipe member of FIG. 1, and is a view showing a state where the holding member is removed from the pipe member body. FIG. 12 is a sixth view showing the mounting and dismounting operations of the tubular window member of the pipe member of FIG. 1, and is a view showing a state where the holding member is removed from the pipe member body. FIG. 13 is a cross-sectional view of a flow-viewing member, showing a state where the blade member is removed from the pipe member body and the blade member is in the second position. FIG. 14 is a view of the flow visual member shown in FIG. 13 and shows a state where the blade member is removed from the tubular window member. FIG. 15 is a cross-sectional view taken along the line XV-XV in FIG. 10. Fig. 16 is a side sectional view of a pipe member according to a second embodiment of the present invention. 17 is a perspective view of a pipe member according to a third embodiment of the present invention. Fig. 18 is a perspective view of a pipe member according to a fourth embodiment of the present invention. FIG. 19 is an exploded perspective view of a tubular window member, a blade member, and a holding member of the pipe member of FIG. 18. FIG. 20 is an exploded perspective view of the tubular window member, the blade member, and the holding member of FIG. 19 as viewed from different directions. FIG. 21 is a side sectional view of the pipe member of FIG. 18. FIG. 22 is a cross-sectional view of a pipe member body of the pipe member of FIG. 18. FIG. 23 is a side view of the blade member of the tube member of FIG. 18. FIG. 24 is a front view of the blade member of FIG. 23. Fig. 25 is a side sectional view of a pipe member according to a fifth embodiment of the present invention. Fig. 26 is a perspective view of a pipe member according to a sixth embodiment of the present invention. FIG. 27 is an exploded perspective view of the tubular window member, the blade member, and the holding member of the pipe member of FIG. 26. FIG. 28 is an exploded perspective view of the tubular window member, the blade member, and the holding member of FIG. 27 as viewed from different directions. FIG. 29 is a side sectional view of the pipe member of FIG. 26. FIG. 30 is a cross-sectional view of a pipe member body of the pipe member of FIG. 26.

Claims (14)

A pipe member is a pipe member assembled between fluid pipe members to form a part of a fluid pipe. The pipe member includes a pipe member body, which is a pipe member body defining a first passage, and has a long-side axis with respect to the first passage. A side opening portion communicating from the side to the first passage opening; a tubular window member is a tubular window member that is assembled to the pipe member body through the side opening portion, and is provided when the pipe window body is assembled to the pipe member body. A second passage which communicates with the first passage and constitutes a flow path of the pipe member, and at least a part of which is made of a transparent material so that the at least part of the flow path can be visually observed in the flow passage; The holding member of the main body is displaceable between a holding position at a position where the tubular window member is engaged with the tubular window member to assemble the tubular window member to the pipe member body, and is separated from the tubular window member and released. A release position where the tubular window member is held so that the tubular window member can be removed from the pipe member body through the lateral opening. The pipe member according to claim 1, wherein the holding member is slidably assembled to the pipe member body between the holding position and the release position in the direction of the long-side axis, and the tubular window member is When the holding member is in the released position, it can be displaced between the assembly position assembled to the pipe member body, and the position from the assembly position toward the long-side axis to release the first passage and At the communication release position where the second passage communicates, the tubular window member can be removed from the pipe member body through the lateral opening at the communication release position. The pipe member according to claim 2, wherein the pipe member main body has a cylindrical front portion and a rear portion, an intermediate portion between the front portion and the rear portion, and the lateral opening portion is formed in The intermediate portion, the tubular window member, is integrated with the pipe member body in the direction of the long-side axis at the assembly position to be sealingly engaged with the front portion. The holding member is a cylindrical shape having a third passage. A member which is hermetically engaged with the tubular window member and the rear portion at the holding position, and the third passage is the flow path of the pipe member together with the first passage and the second passage. The pipe member according to claim 2 or 3, wherein the holding member is detachable from the pipe member body through the side opening in a state where the tubular window member is removed from the pipe member body. The tube member according to claim 2 or 3, wherein the holding member has a protruding portion protruding radially outward from an outer peripheral surface of the holding member, and the tube member body has a receiving recess that receives the protruding portion, When the holding member is located at the holding position, the tube member body can be rotated about the long axis to the center of the tube member body: the protruding portion is integrated with the receiving recess in the direction of the long axis to integrate the rotation position at When the holding member is located in the integrated rotation position, the protruding portion can be caused to displace the holding member to the released position while being received by the receiving recessed portion, and when the holding member is not located in the integrated rotation position, the protruding shape is made. The part interferes with the body of the tube member, so that the holding member cannot be displaced to the release position. The pipe member according to claim 5, wherein the protruding portion has a locking extension extending along an outer peripheral surface of the pipe member body, and the outer peripheral surface of the pipe member body and a portion facing the outer peripheral surface One of the inner side surfaces of the locking extension is provided with a locking protrusion and the other is provided with a locking recess. When the holding member rotates from the integrated rotation position to the locked rotation position at the holding position, the card The stop protrusion is engaged with the locking recess, and the rotation of the holding member is suppressed. The pipe member according to claim 5, wherein the protruding portion has a locking projection on a sliding engagement surface slidingly engaged with the tubular window member, and the tubular window member has a card for receiving the locking projection. When the holding member rotates from the integrated rotation position to the locked rotation position at the holding position, the locking protrusion engages with the locking recess to inhibit the rotation of the holding member. The pipe member according to claim 7, wherein a flexible portion having flexibility in a direction of the long-side axis is provided on the sliding engagement surface of the holding member, and the locking protrusion is provided on the Flexible section. The pipe member according to claim 2 or 3, wherein the pipe member body has a guide surface formed at a side edge of the lateral opening portion and extending in a direction of the long-side axis, and the tubular window member has When the outer peripheral surface of the tubular window member protrudes outward in the radial direction, when the tubular window member is inserted into the first passage from the lateral opening portion and positioned at the communication release position, the guide portion abuts on The guide surface causes the tubular window member to be integrated with the pipe member body in the direction of the long-side axis, and when the tubular window member is displaced from the disconnected position to the assembled position, the guide portion is caused Slide on this guide surface. The pipe member according to any one of claims 1 to 3, further comprising: a flow visual inspection device disposed in the second passage of the tubular window member and displaced by a fluid flowing in the channel member. The tubular member according to claim 10, wherein the flow visual member is a blade member attached to the tubular window member so as to be rotatable in a circumferential direction with respect to the long-side axis, and the tubular window member may be removed from the tubular window member together with the tubular window member. The pipe member body is removed. The pipe member according to any one of claims 1 to 3, wherein the tubular window member has a window outer peripheral surface exposed to the outside when assembled in the pipe member body, and is located in a radial direction of the window outer peripheral surface. Inside the inner peripheral surface of the window, the inside of the second passage is visible through the outer peripheral surface of the window and the inner peripheral surface of the window. The outer peripheral surface of the window is shaped so that the center of curvature of the outer peripheral surface of the window is located in the window. The position between the center of curvature of the peripheral surface and the outer peripheral surface of the window. The pipe member according to claim 12, wherein the cross section of the outer peripheral surface of the window and the inner peripheral surface of the window are each arc-shaped. The pipe member according to any one of claims 1 to 3, wherein the lateral opening portion has first and second lateral opening portions formed at opposite positions in a radial direction of the first passage. The tubular window member can be attached to the pipe member body regardless of whether it passes through either of the first and second side openings.