JPH057796U - Projection type lining device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] A projection sprayer that uses direct injection from a pump to improve the flow of lining materials and to effectively use quick-setting agents with a relatively simple structure. It is an object of the present invention to provide a projection type tunnel lining device of this type that can be added to the above, and in particular the clogging of the quick-setting agent addition portion is unlikely to occur. A feed cylinder having a screw 4 inserted therein is provided with a rotatable projection impeller 3d at the front end thereof, and a supply cylinder having a discharge port 340 intersecting the axis of the feed cylinder is provided at the rear half of the feed cylinder, and a pump is provided therein. The sprayed material is directly guided from the above, and a quick-setting agent addition portion is provided at the portion of the feed cylinder on the rear side of the discharge port of the supply cylinder.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for lining concrete or mortar by centrifugal projection.

[0002]

[Prior Art]

 As a lining means for tunnels, a device of a type in which a lining material is fed in parallel with the tunnel axis by a feed tube having a screw and centrifugally projected in a direction perpendicular to the tunnel axis by an impeller at the tip is disclosed in Japanese Utility Model Publication No. 62-4635. It has been publicly known in the past. In this prior art, the lining material is supplied to the hopper open to the atmosphere at the rear of the feed cylinder by a belt conveyor.Therefore, in the prior art, the height and length of the entire device are reduced. Although it is large and can be applied to large cross-section tunnels, there is a problem that it cannot be applied to tunnels with a diameter of 2 to 3 m, such as waterway tunnels, advanced tunnels, survey shafts, and evacuation shafts. As a countermeasure against this, a supply tube with a discharge port that intersects the axis of the feed tube is provided in the rear area of the feed tube, and this supply tube is connected to the rear pressure feed pump by a hose, and the lining material is directly fed from the pressure feed pump to the feed tube. A method of inputting is being developed.

[0003]

[Problems to be solved by the device]

 This method can realize downsizing of the device, but the lining material discharged from the pressure pump is forcibly pushed into the feed cylinder from the supply cylinder that intersects the axis of the feed cylinder, and the axis line of the feed cylinder is screwed. Since the quick-setting agent was blown into the supply cylinder to feed the lining material through the supply tube, the lining material adhered to the quick-setting agent. In particular, there was a problem that the injection port was blocked due to the reaction when the projecting work was stopped and the quick-setting agent could not be added. In addition, the presence of the quick-setting agent blowing portion in the supply cylinder tends to hinder the flow of the lining material in the supply cylinder, causing a curing reaction of the lining material, and the cross section of the supply cylinder becomes gradually narrower and blocked. There was a problem that it was easy.

[0004]

[Means for Solving the Problems]

 The present invention was devised to solve the above-mentioned problems, and the purpose of the present invention is to provide a lining with a relatively simple structure in a projection type spraying machine that is used in combination with direct injection from a pump. It is an object of the present invention to provide a projection type tunnel lining device of this kind which can improve the flow of materials and can effectively add a quick-setting admixture, and in particular does not easily cause clogging of the part where the quick-setting admixture is added. In order to achieve the above object, the present invention is provided with a rotatable projection impeller at the front end of a feed tube having a screw inserted therein, and a supply tube having a discharge port intersecting with the axis of the feed tube at the rear half of the feed tube. This is a type in which the line material is directly introduced from the pump, and a quick-setting admixture adding portion is provided at a portion of the feed cylinder located behind the discharge port of the supply cylinder.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show an embodiment of a projection type lining device according to the present invention. Reference numeral 1 denotes a moving vehicle body. In this embodiment, wheels 10 and 10 for rails B laid in the tunnel A are provided on both sides of the moving vehicle body so that the vehicle can travel in the tunnel axis direction by a traveling motor or the like (not shown).

Reference numeral 2 denotes a movable frame, which has a box-frame shape similar to that of the movable vehicle body 1, is arranged inside the movable vehicle body 1 excluding the tip, and contacts the groove-shaped frames 1 a, 1 a of the movable vehicle body 1 on both sides. A plurality of sets of rollers 2a, 2a. A support shaft is provided at an appropriate position of the movable frame, and a piston rod 100 of a slide cylinder 1b having a rear end connected to the moving vehicle body 1 is connected to the support shaft. The frame 2 is slid back and forth.

Reference numeral 3 denotes a spraying machine main body mounted above the front end of the movable frame 2. The spraying machine main body 3 includes a straight feed cylinder 3b horizontally supported by a base 3a, and an adjustment sleeve 3c rotatably fitted to the front peripheral surface of the feed cylinder 3b via a bearing 30. And an impeller 3d fitted to the spray adjusting sleeve 3c via a bearing 31 so as to be relatively rotatable. More specifically, the impeller 3d projects by connecting the base cylinder portion 300, a ring plate 301 fixed to the front end of the base cylinder portion 300, a ring plate 302 forming a pair with the ring plate 301, and connecting the ring plates 301, 302. It has a plurality of blades 303 that form a tubular pocket for and a lid plate 304 fixed to the ring plate 302. The base cylinder portion 300 has a belt wheel 300a, which is rotated at a high speed via a belt by an output from an impeller motor (not shown) mounted on the base 3a.

The adjusting sleeve 3 c has a cylindrical main body 306 at the front end of the base cylindrical portion 305, which is loosely fitted to the inner diameter sides of the blade plate 303 and the ring plates 301, 302. A supply window hole 306a is provided so that the lining material passes therethrough and is projected from the cylindrical pocket of the impeller 3d. A sprocket 305a is provided on the base cylinder portion 305, and the output from the sleeve motor 3f mounted on the base 3a is rotated through a chain to change the position of the supply window hole 306a in the circumferential direction. The projection direction can be controlled arbitrarily.

A boss 304a is provided in the center of the inside of the cover plate 304, and a radial inside impeller 304b is provided on the outer diameter side of the boss 304a so as not to contact the cylindrical body 306 and the tip of the feed cylinder. The inside impeller 304b rotates in synchronization with the impeller 3d to orient the lining material in advance and improve the spot property of projection.

As shown in FIGS. 2 and 3, a supply cylinder 34 having a discharge port 340 orthogonal to the axis is provided above the rear half of the feed cylinder 3b. The supply hose 8 is bent toward one side and is connected to a rear end of the supply hose 8 through a joint 80, and the supply hose 8 is connected through a supply conduit 9 to a discharge port of a pressure feed pump (not shown). The pressure pump may be a double piston pump or a squeeze pump. On the other hand, the screw 4 is incorporated in the axial direction of the feed cylinder 3b. In this embodiment, the screw 4 is not provided with a shaft over the entire length like a normal screw, but is separated into a front shaft 4a and a rear shaft 4b, and a shaft is provided in a region corresponding to the discharge port 340 of the supply cylinder 34. Does not exist. That is, the front shaft 4a ends immediately before reaching the discharge port 340, and the rear end of the rear shaft 4b also ends at a position not directly below the discharge port 340. The front shaft 4a and the rear shaft 4b are connected only by the ribbon-shaped blade portion 40 of the screw blade 4c whose base portion is connected to these shaft portions. The screw blade 4c is interrupted in a predetermined range in the middle of the front shaft 4a, and a plurality of stirring blades 4d intersecting the axis of the front shaft 4a at a required angle are arranged in the interrupted region. The front shaft 4a and the rear shaft 4b are preferably hollow shafts, the front end of the front shaft 4a is supported by the boss 304a of the cover plate 304 via a bearing, and the rear end of the rear shaft 4b is the feed cylinder 3b. It is coupled to the output shaft 330 of the drive motor 33 mounted on the end.

Reference numeral 5 denotes a quick-setting admixture adding portion, which is a feature of the present invention, and is provided at a portion of the feed cylinder 3 that is behind the discharge port 340 of the supply cylinder 34. In this embodiment, the quick-setting admixture adding section 5 is formed by inserting a blowing pipe 5a at a required downward inclination angle, and a hose 5c is connected to the blowing pipe 5a via a switching valve 5b. Reference numeral 5c is connected to a quick-fixing agent constant amount feeding device (not shown), for example, a snake pump type feeder type discharge part. As the switching valve 5b, for example, an automatic operation type three-way switching valve is used, and a return hose 5d is connected to the tank portion of the quick-setting admixture metering device. The quick-setting agent adding section 5 may be of a ring nozzle type.

The spraying machine main body 3 may be fixedly mounted on the movable frame 2 by an abutment or the like, but in order to form a uniform lining layer on the tunnel cross section, the spraying machine main body 3 swings and rises in a horizontal plane and a vertical plane. It is preferable to allow descending. The means is arbitrary, but in the embodiment, as the elevating means, as shown in FIG. 1, a pantograph mechanism 35 having a pair of left and right cross-shaped links 350 and 351 is used. The lower end of one of the links 350 extends inside the movable frame 2 and is connected to the piston rod of a lifting cylinder 352 built in the movable frame 2, and its vicinity is pivotally supported by the bracket of the movable frame 2 by a fulcrum 353. There is. The upper end of the link 350 is engaged with a long hole guide 354a provided at the lower part of the elevating base 354 by a pin. The lower end of the other link 351 is engaged with a long-hole guide 354b fixed to the moving vehicle 1 with a pin, and the upper end is pivotally attached to the elevating base 354.

As a swinging means in the horizontal plane, a vertical axis 36 is provided on the elevating base 354, and a bearing pivotally attached to the vertical axis 36 by the base 3 a of the spraying machine body 3 and a pivot pin 370. 37 is externally fitted, and the bearing 37 is connected to the other end of a horizontal cylinder 38 whose one end is connected to the elevating base 354. Further, the lower part of the elevating base 354 and the bearing 37 are connected by a hoisting cylinder 39 as a rocking (raising and lowering) means in a vertical plane.

In this embodiment, the supply hose 8 is movably supported by the hose guide 90, and is connected to the supply conduit 9 via the U-turn-shaped conduit portion 7.

[0015]

[Operation of the embodiment]

 Next, the operation of the device of the present invention will be described. In the tunnel lining, the device is arranged on the rail B laid in the tunnel to drive the pressure pump and drive the impeller motor 3e and the feed motor 33. As a result, the lining material, such as concrete, is pumped to the supply conduit 9, is sent to the docking hose 8 via the U-turn conduit 7, and is supplied to the supply cylinder 34 provided on the feed cylinder 3b of the spraying machine main body 3. Sent in.

In the feed cylinder 3 b, the rear shaft 4 b is rotated by the drive motor 33, and the rotation is transmitted to the front shaft 4 a by the ribbon-shaped blade portion 40, and the entire screw including the ribbon-shaped blade portion 40 rotates. The lining material sent to the supply tube 34 flows down to the feed tube 3b from the discharge port 340 which is opened orthogonally to the feed tube 3b. Since the part for which the quick-set admixture is added is not inserted in the supply cylinder 34, the cross-sectional area of the supply cylinder 34 is not reduced or the cross-section is not deformed. Therefore, the lining material contains large aggregate. Even if it is slazed, it is discharged to the feed cylinder 3b. The lining material that has flowed directly downward from the discharge port 340 is captured by the blades that are spirally moving while being sheared by the ribbon-shaped blade portion 40, and the forward feed is started. After passing the ribbon-shaped blade portion 40, the transport state in the axial direction is stabilized.

On the other hand, for example, a powdered quick-setting admixture is cut out from a quick-setting admixture quantitative supply device (not shown) such as a snake pump type feeder, and compressed air is conveyed to the hose 5c by air flow. Then, it is blown from the hose 5c through a blow pipe 5a leading to the delivery tube 3b behind the lining material discharge port 340. In this way, the quick-setting admixture is not merged in the supply cylinder 34, and only the lining material to which the quick-setting admixture is not added flows down from the discharge port 340. Therefore, as described above, the flow of the lining material should be smooth, and the lining material should be cured by the reaction with the quick-setting agent in the supply cylinder or attached to the screw shaft in the area of the discharge port 340 to react with the lining material. The material does not harden due to, and the feed cylinder is not clogged at all even if projection is continued for a long time.

Then, as described above, the quick-setting agent is blown into the feed tube from the blow-in pipe 5a at a position rearward of the discharge port 340 of the feed tube 3b. Due to the feeding action of the screw, the lining material is hardly filled in this injection area. Therefore, the blowing port of the blowing pipe 5a does not come into contact with the lining material. Therefore, the blowing pipe 5a is not clogged by the curing reaction due to the contact with the lining material, and the quick-setting agent can be smoothly blown even when the projection of a certain amount is stopped and the next projection is started. You can The blown quick-setting agent is advanced by the screw blade 4c of the rear shaft 4b, and is mixed with the lined material sheared and fed by the ribbon-shaped blade portion 40.

The mixed material is sent by the screw blade 4c of the front shaft 4a, stirred by the stirring blade 4d, and then further forwarded. Since the inside impeller 304b is rotating at the tip of the feed tube 3b, the lining material is stirred and simultaneously directed in the radial direction, and discharged from the supply window hole 306a of the adjusting sleeve 3c. Adjustment Since the impeller 3d rotates on the outer circumference of the sleeve 3c, the lining material in each pocket is projected onto the inner surface of the tunnel by centrifugal force. The projection angle is controlled by rotating the adjusting sleeve 3c by the sleeve motor 3f.

During the lining, the lifting cylinder 352, the horizontal cylinder 38, and the undulating cylinder 39 are selectively operated. When the raising / lowering cylinder 352 is operated, the pantograph mechanism 35 rises from the fulcrum about the fulcrum 353, so that the raising / lowering base 354 is lifted and the spraying machine main body 3 rises as shown by the phantom line in FIG. Further, when the horizontal cylinder 38 is operated, the bearing 37 rotates, and the base 3a connected to this bearing 37 swings in the horizontal plane. Therefore, the spraying machine main body 3 is shown by the phantom line in FIG. Shake your head at the required angle. When the hoisting cylinder 39 is operated, the bearing 37 is connected to the base 3a by the pivot pin 370. Therefore, the base 3a swings in the vertical plane, and the spraying machine main body 3 is shown by the phantom line in FIG. Shake your head at the required angle. These allow the lining to be adapted to any shape of tunnel cross section.

Then, if the sliding cylinder 1b is operated while the moving vehicle body 1 is moved in the tunnel axis direction and is moved in parallel with the moving vehicle body 1 or is stopped at regular intervals, the rollers 2a, 2a will move into the groove. Since it rolls along the shaped frames 1a, 1a, the lining material is projected from the impeller 3d while the movable frame 2 carrying the spraying machine main body 3 slides in the tunnel axis direction as shown by the phantom line in FIG. It

[0022]

[Effect of the device]

 According to the present invention described above, the quick-setting agent is not merged with the lining material at the supply tube portion that intersects the axis of the feed tube, but is added at the position of the feed tube of the supply tube 34 behind the discharge port 340 with respect to the feed tube. Since the screw is advanced and mixed with the lining material flowing down from the supply cylinder 34, the injection port of the quick-setting agent addition part does not come into contact with the lining material, and the injection port is reliably blocked by the curing reaction. Therefore, it is possible to always add a quick-setting admixture smoothly for projection lining. Further, since the lining material flows down smoothly from the supply cylinder 34 to the feed cylinder and does not react with the quick-setting agent in the supply cylinder 34, the supply cylinder 34 is also prevented from being blocked. The effect is obtained.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a projection lining device according to the present invention,

FIG. 2 is an enlarged sectional view of the spraying machine main body in FIG.

3 is a sectional view taken along line XX of FIG.

FIG. 4 is a cross-sectional view taken along line YY of FIG.

[Explanation of symbols]

 3 spraying machine main body 3b feed cylinder 3d impeller 4 screw 5 quick-setting admixture part 34 supply cylinder 340 discharge port

Claims (1)

[Claims for utility model registration] [Claim 1] A feed cylinder having a rotatable projection impeller at the front end of a feed cylinder having a screw inserted therein, and a discharge port at the latter half of the feed cylinder intersecting the axis of the feed cylinder. Is provided and a material to be sprayed is directly guided from the pump to this, and a quick-setting admixture adding portion is provided at a portion of the feed cylinder on the rear side of the discharge port of the supply cylinder. Projection type lining device.