JP3216965U - Spray nozzle device - Google Patents

Abstract

Disclosed is a spray nozzle device capable of replenishing water optimally to a spray base material using granulated cement and facilitating a spray operation. A spraying base material P in which sand is added to granulated cement is dry-pumped. A hose connector 10 for connecting the spray nozzle A to the tip of the air hose B is provided. The water addition cylinder 20 is provided on the side surface of the spray nozzle A. Water from the water injection pipe C is sprayed onto the spray base P in the water addition cylinder 20. An air vent 11 that can be freely opened and closed is provided in the hose connector 10. Part of the compressed air that pumps the sprayed substrate P is discharged from the air vent 11. A water injection port 21 that can be freely opened and closed is provided in the water addition cylinder 20. The amount of water added to the spray base P is adjusted. [Selection] Figure 1

Description

  The present invention relates to a spray nozzle device suitable for spraying granulated cement, for example, when reinforcing (repairing) a slope in road construction or residential land preparation with a spraying machine.

  Conventionally, various spray nozzle devices of this type have been disclosed. For example, the apparatus described in Patent Document 1 is a dry transporter of a mixture of sand and cement from a dry sprayer, and pressurized water and compressed air are added to the transported spraying base material, which are mixed into a plurality of mixing devices. A means for spraying after forming by the stirring blades and forming an article to be sprayed is employed.

  In this mixing apparatus, a plurality of stirring blades are provided inside, but it has been difficult to add pressurized water and compressed air in a well-balanced manner to the spray base of sand and cement.

  Therefore, the present applicant has previously proposed a spray nozzle device capable of adding water and compressed air to the spray base material in a well-balanced manner (see Patent Document 2). This spray nozzle device is configured such that water is added to a spray base material that has been dry-pumped into the spray nozzle to form a spray target, and the spray target sprayed from the nozzle tip is further injected while being surrounded by compressed air. Is.

  With such a spray nozzle device, it becomes possible to smoothly pump the spray base material and water, respectively, it is possible to add water and compressed air to this spray base material in a well-balanced manner, and in a homogeneous and good mixing state. An article to be sprayed can be obtained.

  However, in order to dry-pump a spray base made of cement and sand, the spray base moving in the hose is subject to resistance in the hose. The distance was also inconveniently affected by the resistance in the hose.

  On the other hand, in cement, a granulated cement is known in which a solution containing saccharides or hydroxide is applied to the surface of cement particles and a coating layer is formed on the surface of cement particles to improve fluidity. (See Patent Document 3).

  When such a granulated cement is used as a spraying base material for a spraying machine, the resistance in the hose is reduced compared to a spraying base material using ordinary cement, and the distance traveled by the spraying base material and the distance blown from the spray nozzle are conventional. It is known that the ratio is several times or more.

JP 2000-96823 A Japanese Patent No. 5316863 JP-A-9-59048

  However, if the pressure of the compressed air that pumps the spray base material is increased in order to blow away the spray base material using granulated cement with high fluidity, the air pressure of the compressed air that is blown from the tip of the spray nozzle also increases. However, the inconvenience that handling of the hose becomes difficult occurs.

  That is, when high-pressure compressed air is ejected from the tip of the spray nozzle, the spray nozzle is greatly shaken under the influence of strong air pressure. Therefore, the worker must work while withstanding the strong jet power of the compressed air, and the spraying work becomes extremely difficult.

  In addition, in order to ensure that the sprayed material sprayed on the reinforcing surface such as the slope is attached and solidified reliably, the amount of water applied to the spray base is adjusted to the optimal amount, and the sprayed material is in a homogeneous and well mixed state. Things need to be formed. However, no means has heretofore been proposed for adding an appropriate amount of water to a sprayed substrate that is pumped with high-pressure compressed air.

  Therefore, the present invention was created to eliminate the above-mentioned inconveniences, and an optimal amount of water is added to a spray base material using granulated cement to form a sprayed article in a homogeneous and well mixed state. Further, it is an object of the present invention to provide a spray nozzle device that can facilitate the spraying operation even when the air pressure of the compressed air that pumps the spray base material is increased.

  In order to achieve the above-mentioned object, the first means in the present invention is a cylindrical hose connection that connects the spray nozzle A to the tip of the air hose B that dry-pumps the spray base P with sand added to the cement with compressed air. In a spray nozzle device comprising a body 10 and a water addition cylinder 20 for adding water fed by a water injection pipe C to a spray base P in a spray nozzle A, granulated cement is applied to the spray base P. While being used, the hose coupling body 10 is provided with an openable / closable air vent 11 to adjust the pressure of the compressed air, and the water addition cylinder 20 is provided with an openable / closable water injection port 21 to provide a spray base. It exists in having comprised so that the amount of water added to the material P may be adjusted.

  In the second means, a plurality of the water injection ports 21 of the water addition cylinder 20 are opened along the peripheral side surface of the water addition cylinder 20, and the spray passing through the water addition cylinder 20 is performed. It is formed so as to be sprayed in a direction orthogonal to the base material P, and is provided with a water amount adjusting tool 22 that is fitted on the outer surface of the water addition cylinder 20 and moves back and forth along the passing direction of the spraying base material P. The water amount adjusting tool 22 is slidably attached on the water injection port 21 so that the opening area of the water injection port 21 is adjusted.

  The third means slidably accommodates a cylindrical air adjustment pipe 12 inside the hose connector 10, and the position of the tip of the air adjustment pipe 12 is located closer to the tip of the blowing nozzle A than the air vent 11. In addition to being arranged, by adjusting the slide of the air adjustment pipe 12, the interval of the air separation port 13 formed between the distal end portion of the air adjustment pipe 12 and the air vent port 11 is adjusted.

  The fourth means is to connect the mixing cylinder 30 for mixing the spray base material P to either one or both of the front and rear of the water addition cylinder 20, and to the inner peripheral wall surface of the mixing cylinder 30. A plurality of mixing protrusions 31 that collide when the spray base P passes are provided.

  As described in claim 1 of the present invention, compressed air is used in which granulated cement is used as the cement forming the spray base P, and the air outlet 11 that can be freely opened and closed is provided in the hose connector 10 to pump the spray base P. When the spraying base material P using granulated cement is sprayed, the pressure of the compressed air ejected from the tip of the spray nozzle A can be adjusted even when the pressure of the compressed air is increased. , Can make the spraying work easier.

  Further, since the water addition cylinder 20 is provided with an openable and closable water injection port 21 so as to adjust the amount of water added to the spraying base material P, the optimum moisture for the spraying base material P using the granulated cement. Can be replenished. In addition, since the pressure of water added from the water injection port 21 can be adjusted by changing the opening area of the water injection port 21, an appropriate amount of water is applied to the spray base material that is pumped with high-pressure compressed air. It becomes possible to add.

  Since the opening area of the water injection port 21 is adjusted by the water amount adjusting tool 22 of the water addition cylinder 20 as in claim 2, it is optimal when the spray base material P passes through the water addition cylinder 20. It becomes possible to add water adjusted to the amount of water.

  And since it injects in the direction orthogonal to the spraying base material P along the surrounding side surface of the water addition cylinder 20, it is possible to form the to-be-blown material of a homogeneous and favorable mixed state.

  As in claim 3, in the hose connector 10, the gap between the position of the tip of the air adjusting pipe 12 and the air vent 11 is adjusted, and a part of the high-pressure compressed air is configured to be gas from the hose connector 10. Therefore, the operator can adjust the compressed air discharged from the tip of the spray nozzle A with a hand holding the spray nozzle A.

  Further, the position of the front end portion of the air adjusting pipe 12 is arranged on the front end side of the blowing nozzle A from the air vent port 11, and is formed between the front end portion of the air adjusting pipe 12 and the air vent port 11 by slide adjustment of the air adjusting pipe 12. Since the interval between the air separation ports 13 is adjusted, all of the spray base P is sent to the tip end side of the spray nozzle A, and only the compressed air is discharged from the air separation port 13 to the air vent port 11.

  Since the mixing cylinder 30 is connected to the water addition cylinder 20 and the plurality of mixing projections 31 are provided on the inner peripheral wall surface of the mixing cylinder 30 as in claim 4, the inside of the mixing cylinder 30 is sprayed on the inside of the mixing cylinder 30. When the material P passes, it can be mixed until just before the spraying substrate P is sprayed while crushing the granulated cement particles. As a result, it is possible to form an article to be sprayed that is homogeneous and well mixed.

  As described above, according to the present invention, it is possible to replenish the spray base material using the granulated cement with an optimal amount of water to form a sprayed article in a homogeneous and well-mixed state, and to reduce the air pressure of the compressed air. Achieved the original goal of making it easier to spray even if raised.

It is a vertical front view which shows one Example of this invention. It is a vertical front view which shows the water addition cylinder of this invention. It is a vertical front view which shows the hose coupling body of this invention. It is a vertical front view which shows the mixing cylinder of this invention.

  In particular, the present invention is a spray nozzle device using a spray base P in which sand is mixed with granulated cement. The spray nozzle A held by an operator includes a hose connector 10, a water addition cylinder 20, a mixing cylinder. 30 (see FIG. 1).

  The hose connector 10 is a cylindrical member that connects the tip of the air hose B to the rear end of the spray nozzle A. The spray base P obtained by adding sand to cement is compressed from the air hose B to the spray nozzle A. (See Fig. 1). At this time, the hose connector 10 is provided with a freely openable / closable air vent 11 to adjust the pressure of the compressed air.

  In the illustrated example, a cylindrical air adjustment pipe 12 that adjusts the open / close state of the air vent 11 is housed inside the hose connector 10 (see FIG. 3). An air hose B is connected to the rear end portion of the air adjustment pipe 12, and the position of the front end portion of the air adjustment pipe 12 is arranged on the front end side of the blowing nozzle A from the air vent port 11. Further, an air separation port 13 is formed between the tip of the cylindrical air adjustment tube 12 and the inner surface of the hose connector 10, and the air separation tube 12 is slid to allow the space between the air separation ports 13 to slide. Is adjusted so that the air vent 11 can be opened and closed.

  The illustrated air conditioning pipe 12 is formed by constricting the distal end portion of the hose connector 10 to form a tapered surface 14, and the gap between the tapered surface 14 and the distal end portion of the air regulating tube 12 is adjusted. According to such a configuration, the spraying base material P that is pressure-fed with compressed air passes through the tapered surface 14 of the hose connector 10 and is fed toward the tip of the spray nozzle A (see FIG. 3). At this time, a part of the compressed air is discharged from the air separation port 13 to the outside of the spray nozzle A via the air vent port 11 and discharged from the air vent hose D. Moreover, the shape of the air adjustment pipe | tube 12 is not limited to the example of illustration, For example, a coating | coated part is provided in the outer periphery of the air adjustment pipe | tube 12 (not shown), and it covers the air vent 11 directly with this coating | coated part. Arbitrary changes such as configuration are possible.

  The water addition cylinder 20 is a cylinder that adds water supplied from the water injection pipe C to the spray base P in the spray nozzle A. The water addition cylinder 20 is provided with a water injection port 21 that can be opened and closed, and is a spray base. It is comprised so that the amount of water added to the material P may be adjusted (refer FIG. 1).

  A plurality of water injection ports 21 shown in the figure are opened along the peripheral side surface of the water addition cylinder 20 so as to inject in a direction orthogonal to the spray base material P passing through the water addition cylinder 20. (See FIG. 2). Thus, it becomes possible to add water efficiently to the spraying base material P which passes at high speed by injecting water.

  Furthermore, a water amount adjusting tool 22 that is fitted on the outer surface of the water addition cylinder 20 and moves back and forth along the passage direction of the spray base P is provided (see FIG. 2). The water amount adjusting tool 22 is slidably attached on the water injection port 21 to adjust the opening area of the water injection port 21.

  The illustrated water amount adjusting tool 22 includes a water supply chamber 22A and a sealing piece 22B (see FIG. 2). The water supply chamber 22 </ b> A is a part that surrounds the outer periphery of the water addition cylinder 20 and forms a space around the water injection port 21. On the other hand, the sealing piece 22 </ b> B is a part that is slidably overlapped with the opening portion of the water ejection port 21, and adjusts the opening area of the water ejection port 21 by changing the position of the water ejection port 21. At this time, the adjustment range of the opening area of the water injection port 21 is expanded by forming the shape of the water injection port 21 in the shape of a long hole.

  The illustrated sealing piece 22B is screwed to the outer periphery of the water addition cylinder 20, and is provided so as to move to the water injection port 21 side by rotating the sealing piece 22B (see FIG. 2). Then, when the water fed from the water injection pipe C enters the sealing piece 22B from the water feeding port 22C of the sealing piece 22B, passes through the water injection port 21, and is fed into the water addition cylinder 20 The opening area of the water injection port 21 is changed by adjusting the rotation of the sealing piece 22B to adjust the amount of water.

  The mixing cylinder 30 is a part for mixing the granulated cement and sand of the spraying base material P, and a plurality of mixing protrusions 31 that collide with the inner peripheral wall surface of the mixing cylinder 30 when the spraying base material P passes through. Is provided. The illustrated mixing protrusion 31 has a block shape, and a plurality of mixing protrusions 31 having different directions are provided on the inner peripheral surface of the mixing cylinder 30 (see FIG. 4). Further, by forming the front and rear openings of the mixing cylinder 30 in a constricted state, it is possible to increase the mixing efficiency when the spraying base material P is diffused and gathered.

  If the passage destination of the spray base P is the front, the mixing cylinder 30 can be connected to either one of the front and rear positions of the water addition cylinder 20 or to both positions. The illustrated mixing cylinder 30 is connected to the rear of the water addition cylinder 20 (see FIG. 1). In this case, the spraying base material P fed to the air hose B is stirred in the mixing cylinder 30 and then added with an appropriate amount of water in the water addition cylinder 20 and discharged from the tip of the spray nozzle A. Is done. Moreover, when the mixing cylinder 30 is connected in front of the water addition cylinder 20, the spray base P to which moisture has been added is agitated in the mixing cylinder 30 (not shown). Moreover, the connection position and number of the mixing cylinders 30 can be arbitrarily changed according to the situation such as the particle size of the spray base P and the pressure of the compressed air.

  In addition, in this invention, it is not limited to the structure of illustration, The structure change of the hose coupling body 10, the water addition cylinder 20, the mixing cylinder 30, etc. in the range which does not change the summary of this invention is possible. You can do it freely.

P Spraying base material A Spray nozzle B Air hose C Water injection pipe D Air vent hose 10 Hose connector 11 Air vent 12 Air adjustment pipe 13 Air separation port 14 Tapered surface 20 Water addition cylinder 21 Water injection port 22 Water amount adjustment tool 22A Water supply Chamber 22B Sealing piece 22C Water supply port 30 Mixing cylinder 31 Mixing protrusion

Claims (4)

  A cylindrical hose connecting body that connects a spray nozzle to the tip of an air hose that dry-pumps the sprayed base material in which sand is added to cement with compressed air, and the sprayed base material in the spray nozzle that supplies water supplied by a water injection pipe In the spray nozzle device provided with a water addition cylinder to be added to, the granulated cement is used for the spray base material, and an air vent port that can be opened and closed is provided in the hose coupling body so as to adjust the pressure of the compressed air. The spray nozzle device is configured to adjust the amount of water added to the spray base material by providing a water injection port that can be opened and closed in the water addition cylinder. A plurality of the water injection ports of the water addition cylinder are perforated along the peripheral side surface of the water addition cylinder and are injected in a direction orthogonal to the spray base material passing through the water addition cylinder. Formed as
A water amount adjuster that is fitted on the outer surface of the water addition cylinder and moves back and forth along the direction of passage of the spraying base material is provided, and the water amount adjuster is slidably attached onto the water injection port so that the water The spray nozzle device according to claim 1, wherein the spray nozzle device is configured to adjust an opening area of the injection port.   A cylindrical air adjustment pipe is slidably housed inside the hose coupling body, and the position of the tip of the air adjustment pipe is disposed on the tip side of the blowing nozzle from the air vent, and the air adjustment pipe can be adjusted by sliding the air adjustment pipe. The spray nozzle device according to claim 1, configured to adjust an interval between air separation ports formed between a distal end portion of an air adjustment pipe and the air vent port.   A mixing cylinder that mixes the spray base is connected to one or both of the front and rear of the water addition cylinder, and the collision occurs when the spray base passes through the inner peripheral wall surface of the mixing cylinder. The spray nozzle device according to claim 1, wherein a plurality of mixing protrusions 31 are provided.

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