Concrete spraying machine

Abstract

The concrete spraying machine comprises a storage box, a feeding channel and a discharging opening are formed in the top and the bottom of the storage box correspondingly, the discharging opening communicates with a discharging channel, the discharging channel extends to one end of the storage box and communicates with a blowing cavity, a conveying element is arranged in the discharging channel, and an air inlet and a discharging opening are formed in the two ends of the blowing cavity correspondingly; a sealing cover is arranged at the top of the feeding channel, a rotating shaft is arranged at the central axis of the sealing cover in a penetrating mode, the rotating shaft located on the inner side of the sealing cover is provided with external threads, and the inner side of the sealing cover is provided with a movable sleeve in threaded fit with the rotating shaft and a plurality of limiting structures symmetrically connected to the outer surface of the movable sleeve. The limiting structure is configured in the mode that when the rotating shaft rotates, the movable sleeve can drive the limiting structure to synchronously abut against the inner side wall of the feeding channel, and when the rotating shaft rotates in the opposite direction, the movable sleeve can drive the limiting structure to synchronously get away from the inner side wall of the feeding channel, and therefore self-locking can be formed during sealing, and the sealing effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to a jet machine technical field especially relates to a concrete jet machine. BACKGROUND

[0002] The concrete jet machine is a kind of mechanical equipment, which uses compressed air to form the airflow of the concrete in suspension state according to certain proportion and sprays to the surface to be paved to form dense concrete layer to achieve the purpose of support.

[0003] In the prior art, the utility model discloses (announces) No. CN221799807U discloses a dust-free concrete jet machine, by setting up pushing material cavity, blowing material cavity, feed inlet, air inlet and discharge port, filling of concrete material is carried out using negative pressure, high-pressure gas drives concrete material and water mixing to reduce dust amount, improves work efficiency, wherein feed inlet is used to pass in one kind or multiple materials mixed according to certain proportion.However, construction personnel finds in the working process that dripping water phenomenon often appears in mine roadway, most of which is overflowed underground water, forms similar to the phenomenon of raining, and this condition is not suitable for continuous feed type jet machine.

[0004] Based on the above problems, a kind of concrete jet machine is proposed, which uses finished product material construction, especially suitable for construction in closed structure under raining environment. UTILITY MODEL CONTENT

[0005] The embodiment of the application provides a kind of concrete jet machine, its sealing effect is better, especially suitable for construction in raining and other complex environments in the way of finished product material, easy to operate.

[0006] This application provides a concrete spraying machine, including a storage tank. The storage tank has an inlet channel and a discharge port at its top and bottom, respectively. The discharge port is connected to a discharge channel extending to one end of the storage tank and connected to a blowing chamber. A conveying element is provided within the discharge channel to transport material from the discharge channel to the blowing chamber. An air inlet and a discharge outlet are provided at opposite ends of the blowing chamber. A sealing cover is provided at the top of the inlet channel to seal it. The sealing cover has a through-rotation shaft at its central axis. The rotating shaft on the inner side of the cover is provided with an external thread. The inner side of the sealing cover is provided with a movable sleeve that is threadedly engaged with the rotating shaft and a plurality of limiting structures symmetrically connected to the outer surface of the movable sleeve in the circumferential direction. The limiting structures are configured such that when the rotating shaft rotates clockwise or counterclockwise, based on the threaded engagement, the movable sleeve can drive the limiting structures to synchronously press against the inner wall of the feed channel. When the rotating shaft rotates in the opposite direction, based on the threaded engagement, the movable sleeve can drive the limiting structures to synchronously retract and move away from the inner wall of the feed channel.

[0007] In one possible implementation, the rotating shaft has a rotating handle vertically connected to the portion located outside the sealing cover.

[0008] In one possible implementation, the sealing cover has a sealing sleeve at the central axis, and the sealing sleeve is fitted onto the rotating shaft.

[0009] In one possible implementation, the storage tank is provided with an air supply pipe at one end near the blowing chamber, one end of the air supply pipe is connected to the air inlet, and the other end of the air supply pipe is provided with an air outlet. A gas filter, a pressure reducing valve and a safety valve are sequentially installed between the air outlet and the air inlet in the air supply pipe.

[0010] In one possible implementation, the limiting structure includes a connecting rod and a rotating rod. One end of the connecting rod is fixedly connected to the movable sleeve, and the other end of the connecting rod is provided with a movable groove extending vertically along the axial direction of the movable sleeve. The rotating rod is an irregularly shaped rod, including a hinged end, a rotating end, and a clamping end arranged in a triangular pattern. The rotating end is close to the sealing cover, while the hinged end and the clamping end are away from the sealing cover. The hinged end is provided with an opening suitable for engaging with the connecting rod. A first rotating shaft is vertically connected to the outer end of the hinged end of the opening. The first rotating shaft passes through the movable groove. The rotating end is rotatably connected to the inner wall of the sealing cover via a second rotating shaft. The clamping end is close to the feed channel.

[0011] In one possible implementation, the clamping end is a clamping flange.

[0012] In one possible implementation, the feed channel has a circumferential reinforcing layer at the clamping position directly opposite the clamping end.

[0013] In one possible implementation, the feeding element is a screw conveyor shaft.

[0014] Beneficial effects: Compared with the prior art, the concrete spraying machine provided in this application has a sealing cover at the top of the feeding channel. The sealing cover is equipped with a rotating shaft, a movable sleeve and a limiting structure. By rotating the rotating shaft, the limiting structure can be pressed against the inner wall of the feeding channel, thereby forming a self-locking effect on the sealing cover. The sealing effect is good, and it is especially suitable for finished material construction in complex environments such as rain. At the same time, rotating the rotating shaft in the opposite direction can also move the limiting structure away from the inner wall of the feeding channel, thereby opening the sealing cover to facilitate the replenishment of materials to the storage box. It is convenient to use.

[0015] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0016] Fig. 1 A schematic diagram of the concrete spraying machine of this application is shown.

[0017] Fig. 2 A partial structural schematic diagram of the concrete spraying machine of this application at the sealing cover is shown.

[0018] Fig. 3 A bottom view of the concrete spraying machine of this application at the sealing cover is shown. Detailed Implementation

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0020] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0021] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0022] refer to Figs. 1 to 3 This application provides a concrete spraying machine, including a storage tank 10. The storage tank 10 has an inlet channel 11 at its top and a discharge port at its bottom. The discharge port is connected to a discharge channel 12, which extends to one end of the storage tank 10 and is connected to a blowing chamber 13. The discharge channel 12 is equipped with a conveying element to transport the material within it to the blowing chamber 13. The blowing chamber 13 has an air inlet and a discharge outlet 131 at its two opposite ends. High-pressure air is introduced through the air inlet, and under the action of the high-pressure air, the material in the blowing chamber 13 is sprayed out through the discharge outlet 131, completing the spraying output. Furthermore, the top of the feed channel 11 is provided with a sealing cover 20 for sealing the feed channel 11. The sealing cover 20 has a rotating shaft 21 that passes through the central axis. The rotating shaft 21 located on the inner side of the sealing cover 20 is provided with external threads. The inner side of the sealing cover 20 is provided with a movable sleeve 22 that is threadedly engaged with the rotating shaft 21, and a plurality of limiting structures 23 that are symmetrically connected to the outer surface of the movable sleeve 22 in the circumferential direction. The limiting structures 23 are configured such that when the rotating shaft 21 rotates clockwise or counterclockwise, based on the threaded engagement, the movable sleeve 22 can drive the limiting structures 23 to simultaneously press against the inner wall of the feed channel 11. When the rotating shaft 21 rotates in the opposite direction, based on the threaded engagement, the movable sleeve 22 can drive the limiting structures 23 to simultaneously retract and move away from the inner wall of the feed channel 11.

[0023] In summary, the material enters the storage bin 10 through the feed channel 11, and then enters the discharge channel 12 through the discharge port. Under the action of the conveying element, the material is conveyed to the blowing chamber 13. When high-pressure air is introduced into the air inlet of the blowing chamber 13, the high-pressure air will blow the material in the blowing chamber 13 out through the discharge port 131, thus completing the concrete spraying output. The conveying element can be a screw conveyor shaft, which continuously conveys the material through the continuous rotation of the blades on the screw conveyor shaft.

[0024] Furthermore, considering that in some environments, such as continuously dripping mine tunnels, situations similar to continuous rain are often encountered, conventional continuously replenishing concrete spraying machines are no longer suitable for operation. Therefore, this application provides a concrete spraying machine that, by setting a sealing cover 20 at the top of the feeding channel 11, and by cooperating with the rotating shaft 21, the moving sleeve 22, and the limiting structure 23, makes the sealing cover 20 self-locking on the feeding channel 11, resulting in a good sealing effect. It can be fully applied to various complex environments, including continuous rain. When the finished material is used up, the equipment is moved to a good environment, and the rotating shaft 21 is rotated in the opposite direction to open the sealing cover 20 for replenishment.

[0025] In one embodiment, the rotating shaft 21 is vertically connected to a rotating handle 211 on the outer side of the sealing cover 20, so as to facilitate the rotation of the rotating shaft 21 by means of the rotating handle 211, making the rotation operation more convenient.

[0026] In one embodiment, the sealing cover 20 is provided with a sealing sleeve 24 at the central axis, and the sealing sleeve 24 is fitted on the rotating shaft 21 to increase the sealing reliability between the rotating shaft 21 and the sealing cover 20, and to avoid the problem of sealing failure near the rotating shaft 21 due to the rotation of the rotating shaft 21.

[0027] In one embodiment, the storage tank 10 is provided with an air supply pipe 14 at one end near the blowing chamber 13. One end of the air supply pipe 14 is connected to the air inlet, and the other end of the air supply pipe 14 is provided with an air outlet 101. A gas filter 141, a pressure reducing valve 142, and a safety valve 143 are sequentially installed between the air outlet 101 and the air inlet on the air supply pipe 14, so that the high-pressure air supplied can be filtered and pressure reduced, making it safer to use.

[0028] In one embodiment, the limiting structure 23 includes a connecting rod 231 and a rotating rod 232. One end of the connecting rod 231 is fixedly connected to the movable sleeve 22, while the other end of the connecting rod 231 is provided with a movable groove 201 extending vertically along the axial direction of the movable sleeve 22. The rotating rod 232 is an irregularly shaped rod, including a hinged end 2321, a rotating end 2322, and a pressing end 2323 arranged in a triangular pattern. The rotating end 2322 is relatively close to the sealing cover 20, while the hinged end 2321 is relatively close to the sealing cover 20. 321 and the tightening end 2323 are relatively far away from the sealing cover 20. The hinge end 2321 is provided with an opening 202 adapted to be engaged with the connecting rod 231. The hinge end 2321 is vertically connected to a first rotating shaft 2324 at the outer end of the opening 202. The first rotating shaft 2324 passes through the movable groove 201. The rotating end 2322 is rotatably connected to the inner wall of the sealing cover 20 through a second rotating shaft 2325. The tightening end 2323 is close to the feed channel 11.

[0029] The rotation direction of the sealing cover 20 is limited by the rotation direction of the external thread on the rotating shaft 21. Taking the clockwise rotation of the rotating shaft 21 to make the sealing cover 20 self-locking as an example, when the rotating shaft 21 is rotated clockwise, based on the threaded engagement, the movable sleeve 22 moves downward on the rotating shaft 21, and then drives the hinge end 2321 to move downward through the connecting rod 231. Since the rotating end 2322 is fixed to the sealing cover 20 through the second rotating shaft 2325, the rotating rod 232 will form a lever structure with the rotating end 2322 as the hinge axis. When the hinge end 2321 moves downward, the pressing end 2323 moves upward and approaches the feed channel 11 until it abuts and presses against the inner wall of the feed channel 11. Thus, the sealing cover 20 will be firmly connected to the feed channel 11, achieving self-locking and better sealing reliability.

[0030] Conversely, when the rotating shaft 21 is rotated counterclockwise, the movable sleeve 22 moves upward on the rotating shaft 21 based on the threaded engagement relationship. This causes the hinge end 2321 to move upward via the connecting rod 231. Under the action of the lever, the pressing end 2323 moves downward and moves away from the feed channel 11. When the engagement relationship is lost, the sealing cover 20 can be opened to replenish the material.

[0031] In one embodiment, the clamping end 2323 is a clamping flange.

[0032] During long-term operation, the number of material replenishment operations will increase, and the number of times the feed channel 11 is tightened will also increase. This may lead to local wear and thinning, which may cause the tightening end 2323 to be unable to firmly abut against the inner wall of the feed channel 11 within the stroke range of the external thread. Therefore, there is a risk of self-locking failure. Thus, in one embodiment, the feed channel 11 is provided with a reinforcing layer 111, or a reinforcing structure, along the circumferential direction at the tightening position opposite to the tightening end 2323 to provide a more robust local structure with better structural strength, which can extend the service life of the concrete spraying machine.

[0033] It should be noted that the terms "first" and "second" used in this application are for descriptive purposes only and do not indicate any order. They should not be construed as indicating or implying relative importance, and can be interpreted as names.

[0034] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A concrete spraying machine comprising a storage box, opposite top and bottom of the storage box are respectively provided with a feeding channel and a discharge port, the discharge port is communicated with a discharging channel, the discharging channel extends to one end of the storage box and is communicated with a blowing cavity, a material conveying element is arranged in the discharging channel to convey the material in the discharging channel into the blowing cavity, opposite two ends of the blowing cavity are respectively provided with an air inlet and a discharge port, characterized in that, The top of the feeding channel is provided with a sealing cover for sealing the feeding channel, the sealing cover is provided with a rotating shaft penetrating at the middle axis, the rotating shaft at the inner side of the sealing cover is provided with an external thread, the inner side of the sealing cover is provided with a moving sleeve threadedly matched with the rotating shaft and a plurality of limiting structures symmetrically connected to the outer surface of the moving sleeve in the circumferential direction, the limiting structures are configured to, when the rotating shaft rotates clockwise or counterclockwise, based on the threadedly matched relationship, the moving sleeve can drive the limiting structures to be synchronously pressed against the inner side wall of the feeding channel, and when the rotating shaft rotates in the opposite direction, based on the threadedly matched relationship, the moving sleeve can drive the limiting structures to be synchronously retracted away from the inner side wall of the feeding channel.

2. The concrete sprayer of claim 1, wherein, The rotating shaft is vertically connected with a rotating handle at the portion located outside the sealing cover.

3. The concrete sprayer of claim 1, wherein, The sealing cover is provided with a sealing sleeve at the middle axis, and the sealing sleeve is sleeved on the rotating shaft.

4. The concrete sprayer of claim 1, wherein, The storage tank is provided with a gas feeding pipeline at one end close to the blowing cavity, one end of the gas feeding pipeline is connected with the gas inlet, the other end of the gas feeding pipeline is provided with a gas outlet, and the gas feeding pipeline is sequentially provided with a gas filter, a pressure reducing valve and a safety valve between the gas outlet and the gas inlet.

5. The concrete sprayer of claim 1, wherein, The limiting structure comprises a connecting rod and a rotating rod, one end of the connecting rod is fixedly connected with the moving sleeve, the other end of the connecting rod is provided with a movable slot extending in the vertical direction of the axial direction of the moving sleeve, the rotating rod is a special-shaped rod comprising a hinged end, a rotating end and a pressing end distributed in a triangular shape, wherein the rotating end is close to the sealing cover, the hinged end and the pressing end are away from the sealing cover, the hinged end is provided with an opening suitable for being clamped on the connecting rod, the hinged end is vertically connected with a first rotating shaft at the outer side end of the opening, the first rotating shaft penetrates the movable slot, the rotating end is rotatably connected to the inner side wall of the sealing cover through a second rotating shaft, and the pressing end is close to the feeding channel.

6. The concrete sprayer of claim 5, wherein, The pressing end is a pressing flange.

7. The concrete sprayer of claim 5, wherein, The feeding channel is provided with a reinforcing layer in the circumferential direction at the pressing position opposite to the pressing end.

8. The concrete sprayer of claim 1, wherein, The feeding element is a spiral feeding shaft.

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