JP3106249U - Concrete spraying device and vehicle equipped with concrete spraying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the generation of residual concrete and generated dust, improve the working environment and prevent environmental pollution, suppress waste of concrete material cost, and suppress the maintenance cost of the apparatus.
SOLUTION: Concrete supplied into a concrete conveying pipe 34 by a concrete feeding device 33 is accelerated and air-conveyed by using compressed air, and is sprayed from a spray nozzle 35 provided at the end of the concrete conveying pipe 34. In the concrete spraying device 31 configured to spray, two compressed air addition units 36 and 37 are provided in the concrete conveying pipe 34, and one compressed air addition unit 36 is provided in the concrete supply device 33. A concrete spraying device provided in the vicinity is provided.
[Selection diagram] Fig. 1

Description

  The present invention relates to a concrete spraying device and a vehicle equipped with a concrete spraying device for spraying a concrete material when constructing, repairing, reinforcing, etc. a tunnel or an underground structure.

Such a conventional concrete spraying method will be described with reference to the drawings.
In FIG. 4, reference numeral 1 denotes an example of a concrete spraying method. Concrete spraying method 1 uses a concrete supply device 2 having a pumping function, for example, a piston type pump or a squeeze type pump to transfer concrete. In the pipe 3, the pump is pumped for a certain distance, and the compressed air supplied from the compressed air adding section 4 provided in the concrete conveying pipe 3 accelerates and conveys the air from the concrete conveying pipe 3 midway. The concrete is sprayed from the spray nozzle 5.

The concrete spraying method 1 has the following advantages.
(1) The members constituting the concrete conveying pipe 3 are less worn and the running cost is lower. In particular, the longer the pumping distance with respect to the entire length of the concrete conveying pipe 3, the more effective.

(2) The amount of generated dust is small. In particular, the longer the pumping distance with respect to the entire length of the concrete conveying pipe 3, the more effective.
On the other hand, the concrete spraying method 1 has the following disadvantages.

  (1) Before starting the work, in order to reduce the friction in the concrete conveying pipe 3, it is necessary to pass cement milk through the concrete conveying pipe 3 by the same method as the actual spraying work. Unnecessary extra cement milk is required to coat the inside of the concrete conveying pipeline 3 until the air adding section 4, which is wasteful. In particular, the waste of cement milk increases as the pumping distance increases with respect to the entire length of the concrete conveying pipeline 3.

  (2) After the work is completed, residual concrete is generated in the concrete conveying pipe 3 from the concrete supply device 2 to the compressed air adding section 4 and there is waste. In particular, the longer the pumping distance with respect to the entire length of the concrete conveying pipe 3, the greater the amount of remaining concrete.

  (3) If the compressed air adding section 4 is arranged in a place close to the concrete supply device 2 in order to reduce the remaining concrete, the compressed air runs backwards through the concrete conveying line 3 and blows the concrete from the hopper 6 of the concrete supply device 2. May be raised with danger.

  (4) When cleaning the inside of the concrete conveying pipe 3 after the work is completed, the concrete conveying pipe 3 before the compressed air adding section 4 is closed, and the concrete feeding device 2 and the concrete conveying pipe 3 are separated. It is necessary to mix and supply the compressed air and water from the addition section 4 and supply the mixed water, and the back injection is required. This requires a lot of time and effort, and also causes the remaining concrete to be scattered and the concrete transport pipe 3 to be formed by the reaction force of the injection. May be rampant, which is dangerous.

(5) At the time of cleaning the inside of the concrete transport pipe 3 after the work is completed, residual concrete discharged together with the washing water becomes a source of contamination of the surrounding environment.
A technique similar to the concrete spraying method 1 is also described in Patent Documents 1, 2, and 3.

  FIG. 5 shows the concrete supply device 2 comprising a hopper 6 having two discharge ports 6a and 6b at a lower end, and a piston having a first cylinder 7 and a second cylinder 8 which operate in opposite directions to each other. The pump includes a pressure pump 9, a discharge pipe 10, and a pressure switch mechanism 11 that switches between a first cylinder 7 and a second cylinder 8 that communicate with the discharge pipe 10.

  The pressure feed switching mechanism 11 is integrally fixed to the end of the first cylinder 7 and the end of the second cylinder 8, and has a first communication hole 12 and a second communication which communicate with the first cylinder 7 and the second cylinder 8, respectively. A first face plate 14 having a hole 13 formed therein and a discharge hole 15 fixed to the bottom of the hopper 6 and communicating with the discharge pipe 10 are formed. And a second face plate 18 having a first suction hole 16 and a second suction hole 17 communicating with the two discharge ports 6a and 6b, respectively. By sliding, the first communication hole 12 and the second communication hole 13 of the first face plate 14 communicate with the first suction hole 16 and the discharge hole 15 of the second face plate 18, respectively, or the discharge hole 15 and the second The two suction holes 17 are configured to communicate with each other. The piston-type pressure pump 9 including the first cylinder 7 and the second cylinder 8 and the first face plate 14 constitute a slidable slide portion 19.

  Thus, when the first face plate 14 of the slide portion 19 slides with respect to the second face plate 18 and reaches, for example, the left stroke end, the first communication hole 12 and the second communication hole 13 of the first face plate 14 are respectively formed. The first suction hole 16 of the second face plate 18 communicates with the discharge hole 15, whereby the first cylinder 7 communicates with the hopper 6, the second cylinder 8 communicates with the discharge pipe 10, and the piston type pump 9 By operation, the first cylinder 7 sucks the concrete from the hopper 6 and the second cylinder 8 discharges the concrete to the discharge pipe 10.

  Then, at the same time when the first cylinder 7 and the second cylinder 8 reach the stroke end, the slide portion 19 is slid rightward, and when the slide portion 19 reaches the right stroke end, the first communication hole 12 of the first face plate 14 is formed. , The second communication hole 13 communicates with the discharge hole 15 and the second suction hole 17 of the second face plate 18, whereby the first cylinder 7 communicates with the discharge pipe 10 and the second cylinder 8 communicates with the hopper 6. The first cylinder 7 discharges concrete to the discharge pipe 10, and the second cylinder 8 sucks concrete from the hopper 6.

  Then, at the same time when the first cylinder 7 and the second cylinder 8 reach the stroke end, the slide portion 19 is slid to the left, and the above operation is repeated, so that the concrete is continuously discharged from the discharge pipe 10.

  However, in the concrete supply device 2, the first suction hole 16 and the second suction hole 17 of the second face plate 18 are formed near both sides of the discharge hole 15; The separation dimension H1 of the discharge hole 15 is formed smaller than the inner diameter dimension D1 of the first communication hole 12 of the first face plate 14, and the separation dimension H1 between the discharge hole 15 and the second suction hole 17 is the first face plate. Since the second communication hole 13 is formed smaller than the inner diameter D1 of the second communication hole 13, the first suction hole 16 and the discharge hole 15 communicate with each other through the first communication hole 12 when the slide portion 19 slides left and right. When a state occurs, or a state occurs in which the discharge hole 15 and the second suction hole 17 communicate with each other through the second communication hole 12 and pressure is applied to the discharge pipe 10, concrete enters the hopper 6. There is a risk of backflow.

  In FIG. 6, reference numeral 21 denotes another concrete spraying method. The concrete spraying system 21 uses a concrete supply device 23 having no pumping function such as a rotor 22, for example, and concrete is provided immediately after the concrete supply device 23. The compressed air supplied from the compressed air adding section 24 conveys air over the entire length of the concrete conveying pipe 25 and jets it from the spray nozzle 26.

The concrete spraying method 21 has the following advantages.
(1) Before starting the operation, a small amount of cement milk is required for coating the inside of the concrete conveying pipe 25.

(2) At the end of the work, almost no residual concrete is generated in the concrete conveying pipe 25.
(3) At the time of cleaning the inside of the concrete conveying pipe 25 after the work is completed, water may be put into the hopper 23a of the concrete supply device 23 instead of concrete, so that the work is not troublesome and there is a danger. Few.

On the other hand, the concrete spraying method 21 has the following disadvantages.
(1) Since the air conveyance distance is long, the members constituting the pipeline are greatly worn and the running cost is increased.

(2) Since the air transport distance is long, the amount of generated dust is large.
In the concrete spraying methods 1 and 21, pipes such as a bend pipe, a taper pipe, and a straight pipe and a rubber hose are used in an appropriate combination as pipe members constituting the concrete transport pipe lines 3 and 25.

  In addition, the concrete conveying pipes 3 and 25 between the compressed air addition sections 4 and 24 and the spray nozzles 5 and 26 are provided with quick setting agent addition sections 27 and 28 for improving the solidification property of the concrete. Is common. In addition, although not shown, auxiliary equipment such as a compressed air supply source for transporting concrete by air and a quick-setting additive adding device is appropriately combined and used.

Further, in the execution work, the concrete spraying method 1 is widely used in terms of reducing running costs and preventing work environment deterioration due to dust generation.
JP-A-6-129191 JP-A-2003-1150 Japanese Patent Application Laid-Open No. 2003-119791

  In view of the above situation, the present invention combines the advantages of the above two methods and eliminates the drawbacks, thereby reducing the cost of concrete material while reducing the maintenance cost of the equipment and increasing the severity in recent years. It is an object of the present invention to provide a concrete spraying system in which increased environmental pollution is prevented, that is, the amount of remaining concrete is reduced and the working environment is improved, that is, dust generated is reduced.

In order to solve the above problems, the present invention provides the following configurations.
The invention according to claim 1 is to accelerate / convey concrete supplied into the concrete conveying pipeline by the concrete supply device by using compressed air, and spray the concrete from a spray nozzle provided at the end of the concrete conveying pipeline. In a concrete spraying device configured to spray, two compressed air addition units are provided in the concrete conveying pipeline, and one compressed air addition unit is provided near the concrete supply device. And a concrete spraying device.

  According to a second aspect of the present invention, the concrete supply device includes a hopper having two discharge ports at a lower end, a piston-type pump having a first cylinder and a second cylinder operating in opposite directions, and a discharge pipe. A pressure feed switching mechanism for switching between the first cylinder and the second cylinder communicating with the discharge pipe, wherein the pressure feed switching mechanism is integrated with the first cylinder end and the second cylinder end. A first face plate, which is fixed and has a first communication hole and a second communication hole communicating with the first cylinder and the second cylinder, respectively, and is fixed to the hopper bottom and the discharge pipe; A second face plate having a first suction hole and a second suction hole which are formed on both sides of the discharge hole communicating with the two discharge ports of the hopper on both sides of the discharge hole, respectively; The first face plate becomes the second face plate The first communication hole and the second communication hole of the first face plate communicate with the first suction hole and the discharge hole of the second face plate, respectively, or the discharge hole and the second suction hole of the second face plate communicate with each other. The first suction hole and the discharge hole are formed so as to be larger than the inner diameter of the first communication hole, and the separation size between the discharge hole and the second suction hole is the same as that of the first suction hole. 2. The concrete spraying device according to claim 1, wherein the concrete spraying device is formed to have a diameter larger than the inner diameter of the two communication holes.

  According to a third aspect of the present invention, there is provided a concrete spraying device according to the first or second aspect, a positioning means for positioning the spraying nozzle, and a cart for making the concrete spraying device movable. A vehicle equipped with a concrete spraying device is provided.

  The invention according to claim 4 is characterized in that the concrete spraying device mounted vehicle according to claim 3 is provided with a remote control device for remotely controlling the positioning of the spray nozzle and the switching operation of the compressed air supply. And a concrete spraying device mounted vehicle.

  According to the invention of claim 1 of the present invention, concrete supplied into the concrete conveying pipeline by the concrete supplying device is accelerated / pneumatically transported by using compressed air and provided at the end of the concrete transporting pipeline. In the concrete spraying device configured to spray and spray from the spraying nozzle, two compressed air addition units are provided in the concrete conveying pipe, and one compressed air addition unit is provided near the concrete supply device. The following advantages are provided by providing the provided concrete spraying device.

(1) The amount of cement milk used for coating in the pipeline required before the spraying operation is started is small and economical.
(2) Since the concrete pumping distance is long in the pipeline, the amount of dust generated is suppressed, and the working environment is not deteriorated.

(3) Since the concrete pumping distance can be increased in the pipeline, the wear of the piping member is small, and the maintenance cost is suppressed.
(4) When washing after the spraying operation is completed, the labor for separating the concrete supply device and the pipeline can be omitted.

  (5) At the end of the spraying operation, there is almost no residual concrete in the pipeline, so it is economical, and at the same time, the discharge of concrete as industrial waste is small and it is environmentally friendly.

(6) At the time of washing, there is no need to inject compressed air and water in reverse, so that it is safe and does not pollute the working environment.
According to the invention of claim 2, the concrete supply device comprises a hopper having two outlets at a lower end, a piston type pump having first and second cylinders operating in opposite directions, and a discharge pump. A pipe, and a pressure-feed switching mechanism for switching between the first cylinder and the second cylinder communicating with the discharge pipe, wherein the pressure-feed switching mechanism is connected to the first cylinder end and the second cylinder end. A first face plate that is integrally fixed and has a first communication hole and a second communication hole that communicate with the first cylinder and the second cylinder, respectively; A discharge hole communicating with the pipe is formed, and a second face plate formed with a first suction hole and a second suction hole communicating with two discharge ports of the hopper on both sides of the discharge hole. And the first face plate is a second face plate. By sliding with respect to the plate, the first communication hole and the second communication hole of the first face plate communicate with the first suction hole and the discharge hole of the second face plate, respectively, or the discharge hole and the second suction hole. The first suction hole and the discharge hole are formed to be larger than the inner diameter of the first communication hole, and the separation size between the discharge hole and the second suction hole is set to be larger than the inner diameter of the first communication hole. Since the second communication hole is formed to be larger than the inner diameter of the second communication hole, in addition to the effect of the invention according to claim 1, by preventing the discharge hole and the suction hole from communicating with each other, the backflow of concrete to the hopper is prevented. be able to.

  According to a third aspect of the present invention, there is provided the concrete spraying device according to the first or second aspect, a positioning means for positioning the spraying nozzle, and a cart for making the concrete spraying device movable. Therefore, the positioning of the spraying nozzle can be performed by the positioning means, and the concrete spraying device can be moved by the bogie, so that the work becomes easy and the transport becomes easy.

  According to the fourth aspect of the present invention, the vehicle equipped with the concrete spraying device according to the third aspect includes the remote control device for remotely controlling the positioning of the spray nozzle and the switching operation of the supply of the compressed air. The remote control device enables the positioning of the spray nozzle and the operation of switching the supply of the compressed air to be remotely operated.

Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples.
In FIG. 1, reference numeral 31 denotes a concrete spraying device according to the present invention. The concrete spraying device 31 is a concrete feeding device 33 having a piston-type pumping pump 32 to be supplied into a concrete conveying pipe 34 by a concrete feeding device 33 described later. Is accelerated and air-conveyed using compressed air, and is sprayed and blown from a spray nozzle 35 provided at the end of the concrete conveying pipeline 34. Compressed air adding sections 36 and 37 are provided, one compressed air adding section 36 is provided near the concrete supply device 33, preferably immediately after the concrete supply device 33, and the other compressed air addition portion 37 is provided with concrete. It is provided at a substantially intermediate position between the supply device 33 and the spray nozzle 35. In addition, the other compressed air adding section 37 can be attached to an arbitrary position of the concrete conveying pipeline 34.

  Further, the concrete supply device 33 is provided with a hopper 38 for charging concrete, and furthermore, a quick setting agent adding device (see FIG. 1) between the compressed air adding portion 37 and the spray nozzle 35 of the concrete conveying pipeline 34. A quick-setting additive adding section 39 for adding a quick-setting additive supplied from a not-shown) is provided.

An example of the concrete spraying operation using the concrete spraying device 31 and an example of the front and rear operations required for the spraying operation will be described below.
(1) In the coating operation of the cement milk in the concrete transport pipe line 34, the cement milk in an amount necessary for coating is poured into a hopper 38 provided in the concrete supply device 33, and then provided near the concrete supply device 33. The supply of the compressed air to the compressed air addition section 36 thus started is started, and the concrete supply device 33 is subsequently operated.

  (2) The cement milk supplied by the concrete supply device 33 into the concrete transport pipeline 34 is immediately transported in the concrete transport pipeline 34 by the compressed air by the compressed air addition unit 36, and the inside of the concrete transport pipeline 34 is coated. Is done.

  (3) When all of the cement milk supplied to the concrete supply device 33 passes through the concrete conveying line 34 and the coating operation is completed, the supply of the compressed air to the compressed air adding section 36 is stopped, and the other compressed air is supplied. At the same time as the supply of the compressed air to the addition section 37 is started, the concrete is put into the hopper 38 of the concrete supply device 33.

  (4) The concrete put into the hopper 38 of the concrete supply device 33 is pressure-fed in the concrete conveying pipe 34 by the concrete supply device 33, and reaches the compressed air addition section 37 and is mixed with the compressed air.

(5) The concrete mixed with the compressed air is conveyed by compressed air, and is injected from the spray nozzle 35.
(6) When the injection of the concrete from the spray nozzle 35 starts, the quick-setting agent is mixed in the quick-setting agent adding section 39.

  (7) Further, while the concrete is continuously charged into the hopper 38 of the concrete supply device 33, a desired required amount of spraying operation is performed. Then, when the required amount of concrete is sprayed, the charging of the concrete into the concrete supply device 33 ends.

  (8) When all of the concrete put into the hopper 38 of the concrete supply device 33 is sent into the concrete conveyance pipeline 34, the concrete enters the concrete conveyance pipeline 34 from immediately after the concrete supply measure 33 to the compressed air addition unit 37. In the remaining state, the pumping becomes impossible, and the injection of the concrete from the spray nozzle 35 stops.

  (9) Then, when it is confirmed that the concrete is no longer injected from the spray nozzle 35, the supply of the compressed air to the compressed air addition unit 36 is started while the supply of the compressed air to the compressed air addition unit 37 is continued, The concrete remaining in the concrete conveying pipe 34 is pressure-fed by the pneumatic force of the compressed air addition unit 36, mixed with the compressed air again in the compressed air addition unit 37, and injected from the spray nozzle 35.

  (10) When all of the concrete in the concrete conveying pipe 34 is exhausted, the injection of the concrete from the spray nozzle 35 stops, so that the operation of the concrete supply device 33 and the supply of the compressed air to the compressed air adding unit 37 are maintained. Then, the supply of the quick setting agent by the quick adding agent adding section 39 and the supply of the compressed air to the compressed air adding section 36 are stopped, and the spraying operation is ended.

  (11) After the spraying operation is completed, an appropriate amount of water is poured into the hopper 38 of the concrete supply device 33 to wash the concrete adhering in the concrete supply device 33 and the concrete transport pipeline 34, and the hopper 38 is washed. I do.

  (12) The water used for cleaning the hopper 38 is sent into the concrete conveying pipe 34 by the concrete supply device 33 and is conveyed in the concrete conveying pipe 34 by the compressed air supplied from the compressed air adding section 36. At the same time, the inside of the concrete conveying pipeline 34 is cleaned.

Thus, the concrete spraying device 31 has the following advantages.
(1) The amount of cement milk used for coating in the concrete conveying pipeline 34 required before the start of the spraying operation is small and economical.
(2) Since the concrete pumping distance can be long in the concrete transport pipeline 34, the amount of dust generated is suppressed and the working environment is not deteriorated.

(3) Since the concrete pumping distance can be increased in the concrete conveying pipe 34, the wear of the piping member is small, and the maintenance cost is suppressed.
(4) In cleaning after the spraying operation is completed, the labor for separating the concrete supply device 33 and the concrete conveying pipe 34 can be omitted.

  (5) At the end of the spraying operation, almost no residual concrete is generated in the concrete conveying pipeline 34, so that it is economical, and at the same time, the discharge of concrete as industrial waste is small, and it is environmentally friendly.

(6) At the time of washing, there is no need to inject compressed air and water in reverse, so that it is safe and does not pollute the working environment.
FIG. 2 shows the concrete supply device 33. The concrete supply device 33 is, similarly to the conventional concrete supply device (2 in FIG. 5), a hopper 38 having two discharge ports 38a and 38b at the lower end, A piston type pump 32 having a first cylinder 40 and a second cylinder 41 which operate in opposite directions, a discharge pipe 42, and a pressure feed for switching between the first cylinder 40 and the second cylinder 41 communicating with the discharge pipe 42. And a switching mechanism 43.

  Further, the pressure feed switching mechanism 43 is integrally fixed to an end of the first cylinder 40 and an end of the second cylinder 41, and has a first communication hole 44 and a second communication which communicate with the first cylinder 40 and the second cylinder 41, respectively. A first face plate 46 having a hole 45 formed therein, and a discharge hole 47 fixed to the bottom of the hopper 38 and communicating with the discharge pipe 42 are formed, and the hopper 38 is provided on both sides of the discharge hole 47. A first suction port 48 and a second face plate 50 having a second suction hole 49 communicating with the two discharge ports 38a and 38b are provided. The first face plate 46 slides on the second face plate 50. By moving, the first communication hole 44 and the second communication hole 45 of the first face plate 46 communicate with the first suction hole 48 and the discharge hole 47 of the second face plate 50, respectively, or the discharge hole 47 and the second It is configured to communicate with the suction holes 49 respectively.The piston type pump 32 having the first cylinder 40 and the second cylinder 41 and the first face plate 46 constitute a slidable slide portion 51.

  The concrete supply device 33 differs from the conventional concrete supply device (2 in FIG. 5) in that the distance H2 between the first suction hole 48 and the discharge hole 47 is the inner diameter D2 of the first communication hole 44. The distance H3 between the discharge hole 47 and the second suction hole 49 is formed to be larger than the inner diameter D3 of the second communication hole 45. The inner diameter D2 and the inner diameter D3 may be the same, and the separation H2 and the separation H3 may be the same.

  Thus, when the first face plate 46 of the slide portion 51 slides with respect to the second face plate 50 and reaches, for example, the left stroke end, the first communication holes 44 and the second communication holes 45 of the first face plate 46 respectively become The first suction hole 48 of the second face plate 50 communicates with the discharge hole 47, whereby the first cylinder 40 communicates with the hopper 38, the second cylinder 41 communicates with the discharge pipe 42, By the operation, the first cylinder 40 sucks the concrete from the hopper 38, and the second cylinder 41 discharges the concrete to the discharge pipe 42.

  Then, at the same time when the first cylinder 40 and the second cylinder 41 reach the stroke end, the slide part 51 is slid to the right, and when the slide part 51 reaches the right stroke end, the first communication hole 44 of the first face plate 46 is formed. , The second communication hole 45 communicates with the discharge hole 47 and the second suction hole 49 of the second face plate 50, whereby the first cylinder 40 communicates with the discharge pipe 42, and the second cylinder 41 communicates with the hopper 38. The first cylinder 40 discharges the concrete into the discharge pipe 42, and the second cylinder 41 sucks the concrete from the hopper 38.

  Then, at the same time when the first cylinder 40 and the second cylinder 41 reach the stroke end, the slide portion 51 is slid to the left, and the above-described operation is repeated to continuously discharge the concrete from the discharge pipe 13.

  Thus, in the concrete supply device 33, the separation dimension H2 between the first suction hole 48 and the discharge hole 47 is formed to be larger than the inner diameter D2 of the first communication hole 44, and the discharge hole 47 and the second Since the distance H3 from the suction hole 49 is formed to be equal to or larger than the inner diameter D3 of the second communication hole 45, when the sliding portion 44 slides left and right, the first communication hole 44 is connected to the first suction hole 48 and discharges. When the pressure is applied to the discharge pipe 42 without communicating with the hole 47 and the second communication hole 45 does not connect the discharge hole 47 and the second suction hole 49, the hopper 38 There is no danger of the concrete flowing backward.

  In FIG. 3, reference numeral 52 denotes a vehicle equipped with a concrete spraying device. The vehicle 52 equipped with a concrete spraying device mounts the concrete spraying device 31 and a positioning means for positioning the spraying nozzle 35 of the concrete spraying device 31. And a truck 54 for moving the concrete spraying device 31.

  As described above, the concrete spraying device 31 has a concrete supply device 33, a concrete conveying pipe 34, and a spray nozzle 35. The concrete supply device 33 is provided with a hopper 38 and a piston-type pressure pump 32. ing.

  The truck 54 is provided with wheels 55, 55 and is configured to travel automatically. In addition, although the wheels 55 and 55 are provided on the cart 54, a multi-wheeled illegally traveling vehicle or a crawler (infinite track) may be used instead according to the use environment. In the figure, 56 is a quick-setting additive adding device.

  Thus, when the concrete spraying operation is performed by the concrete spraying device-equipped vehicle 52, the truck 54 is moved to the work place, and the boom arm 53 is swung and swung to move the spray nozzle 35 to the work position. After approaching, the concrete spraying device 31 is operated to spray concrete from the spray nozzle 35 to the work position. At this time, the carriage 54 can be run, and the boom arm 53 can be swung and swinged to move the spraying operation position of the spray nozzle 35.

  Although not shown, the concrete spraying device-equipped vehicle 52 includes a positioning of the spray nozzle 35 by the boom arm 53, a switching operation of the compressed air supply by the compressed air addition units 36 and 37, and a quick setting agent addition unit. A remote control device is provided for remotely controlling the addition operation of the quick-setting agent by the 39 and the positioning of the spray nozzle 35 by the boom arm 53 and the compression by the compressed air addition units 36 and 37 by the remote control device. The air supply switching operation and the quick-setting agent adding operation by the quick-setting agent adding unit 39 are configured to be performed by one operator.

  Thus, in the vehicle 52 equipped with the concrete spraying device, the spraying nozzle 35 can be positioned by the boom arm 53, and the concrete spraying device 31 can be moved by the bogie 54.

Further, by the remote control device described above, the positioning of the spray nozzle, the operation of switching the supply of the compressed air, and the operation of adding the quick-setting agent can be operated at a remote position by one operator.

(A) It is a top view of the concrete spraying apparatus by this invention. (B) It is a partially cutaway front view of the concrete spraying apparatus by this invention. (A) It is a perspective view of the concrete supply apparatus of the concrete spraying apparatus shown in FIG. (B) It is a top view of the slide part of the concrete spraying apparatus shown in FIG. 1 is a front view of a vehicle equipped with a concrete spraying device according to the present invention. (A) It is a top view explaining the concrete spraying method of the conventional example. (B) It is a partially notched front view explaining the concrete spraying method of the conventional example. (A) It is a perspective view of the concrete supply apparatus of the concrete spraying system shown in FIG. (B) It is a top view of the slide part of the concrete spraying system shown in FIG. (A) It is a top view explaining the concrete spraying method of another conventional example. (B) It is a partially notched front view explaining the concrete spraying method of another conventional example.

Explanation of reference numerals

31 Concrete spraying device 32 Piston type pressure pump 33 Concrete supply device 34 Concrete conveying pipeline 35 Spray nozzles 36, 37 Compressed air addition unit 38 Hoppers 38a, 38b Discharge port 39 Quick setting agent addition unit 40 First cylinder 41 Second cylinder 42 Discharge pipe 43 Compression switching mechanism 44 First communication hole 45 Second communication hole 46 First face plate 47 Discharge hole 48 First suction hole 49 Second suction hole 50 Second face plate 52 Concrete spraying device mounting vehicle 54 Bogies H2, H3 Separated Dimensions D2, D3 Inner diameter

Claims (4)

  The concrete supplied by the concrete supply device into the concrete conveying pipe is accelerated and air-conveyed using compressed air, and is sprayed and sprayed from a spray nozzle provided at the end of the concrete conveying pipe. In the concrete spraying apparatus, two compressed air adding sections are provided in the concrete conveying pipeline, and one compressed air adding section is provided near the concrete supply apparatus.   The concrete supply device includes a hopper having two discharge ports at a lower end, a piston-type pump having a first cylinder and a second cylinder that operate in opposite directions, a discharge pipe, and the discharge pipe. A pressure switching mechanism for switching between the first cylinder and the second cylinder, wherein the pressure switching mechanism is integrally fixed to the first cylinder end and the second cylinder end; A first face plate having a first communication hole and a second communication hole communicating with the cylinder and the second cylinder, respectively; and a discharge hole fixed to the hopper bottom and communicating with the discharge pipe. And a second face plate having a first suction hole and a second suction hole communicating with the two discharge ports of the hopper, respectively, on both sides of the discharge hole, wherein the first face plate is a second face plate. By sliding against The first communication hole and the second communication hole of the first face plate are configured to communicate with the first suction hole and the discharge hole of the second face plate, respectively, or to communicate with the discharge hole and the second suction hole, respectively. Further, the distance between the first suction hole and the discharge hole is formed to be equal to or larger than the inner diameter of the first communication hole, and the distance between the discharge hole and the second suction hole is equal to or larger than the inner diameter of the second communication hole. The concrete spraying device according to claim 1, wherein the concrete spraying device is formed in a shape.   3. A concrete spraying device comprising: the concrete spraying device according to claim 1 or 2; positioning means for positioning the spraying nozzle; and a cart for making the concrete spraying device movable. Onboard car. 4. The vehicle equipped with a concrete spraying device according to claim 3, further comprising a remote control device for remotely controlling positioning of the spray nozzle and switching operation of compressed air supply.

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