A handheld concrete pouring device for use in confined spaces

Abstract

This invention discloses a handheld concrete pouring device for use in confined spaces. It includes a material guide hose, an elastic vibrating tube, a vortex material guide tube, and an adjustable bidirectional discharge head, connected sequentially along the concrete flow direction. The inlet end of the material guide hose is connected to the outlet of a delivery pump, and the inlet of the delivery pump is connected to the outlet of a concrete mixing plant. A feed control valve is installed at the end of the material guide hose near the elastic vibrating tube, and a humidity regulating pipe assembly is installed on the vortex material guide tube. This invention is handheld and allows for pressurization and depressurization of the concrete as needed, enabling the pouring of different areas within irregular pouring chambers. It also allows for adjustment of the poured concrete's shape, improving pouring efficiency and effectively preventing the mixing of concrete with air, thereby improving project quality. This invention is applicable to the technical field of concrete pouring in confined areas.

Description

Technical Field

[0001] This invention belongs to the technical field of construction in narrow areas, specifically, it relates to a handheld pouring device for concrete pouring in confined spaces. Background Technology

[0002] Currently, in construction work within confined spaces, the first step is to tie the reinforcing steel bars. After tying, the formwork is assembled to create a pouring cavity, into which concrete is then poured. However, due to the limited working space and the diverse shapes of the pouring cavities, manual pouring is necessary. During the process, workers hold a flexible pouring hose, and the concrete flows into the pouring cavity at a low pressure. Because of the limited space, some areas of the pouring cavity are far from the workers, and gravity flow cannot fill the cavity, necessitating pressurization. However, pressurization causes the hose to swing, increasing the difficulty of holding it. Furthermore, the concrete jets out in a dispersed manner, resulting in insufficient lift and inaccurate pouring into the designated area. The dispersed concrete also combines with more air, ultimately leading to a high air content in the concrete and affecting the quality of the project. Summary of the Invention

[0003] This invention provides a handheld pouring device for concrete pouring in confined spaces. It is designed to be handheld by construction workers and to pressurize and depressurize the concrete as needed, thereby achieving the purpose of pouring different areas within an irregular pouring cavity. It can also adjust the shape of the poured concrete, improve pouring efficiency, effectively prevent the mixing of concrete and air, and thus improve the quality of the project.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A handheld concrete pouring device for use in confined spaces includes a material guide hose, an elastic vibrating tube, a swirl material guide tube, and an adjustable bidirectional discharge head, which are connected sequentially along the flow direction of the concrete. The inlet end of the material guide hose is connected to the outlet of a conveying pump, and the inlet of the conveying pump is connected to the outlet of a concrete mixing plant. A feed control valve is installed at one end of the material guide hose near the elastic vibrating tube, and a humidity regulating pipe assembly is installed on the swirl material guide tube.

[0005] Furthermore, the elastic vibrating tube includes a rotating impeller rotatably mounted between the guide tube and the connecting tube, an active striking element extending into the connecting tube is installed on the rotating impeller, and a plurality of passive striking elements are spaced apart along the circumference on the inner wall of the connecting tube, and when the active striking element rotates with the rotating impeller, the active striking element intermittently strikes the passive striking element.

[0006] Furthermore, the active striking element includes a conical spring extending along the axis of the connecting tube, the small-diameter end of the conical spring being fixedly connected to the rotating impeller, and the large-diameter end of the conical spring extending to the passive striking element.

[0007] Furthermore, the passive striking element includes a toothed structure, the tips of which extend radially inward along the connecting tube, and the end face of the toothed structure near the conical spring is an inclined guide surface.

[0008] Furthermore, a first adapter ring and a second adapter ring are respectively constructed at the ends of the connecting tube and the guide tube that are close to each other. A plurality of first connecting ears are evenly constructed on the first adapter ring along its circumference, and a plurality of second connecting ears are evenly constructed on the second adapter ring along its circumference. The first connecting ears and the second connecting ears are arranged in a one-to-one correspondence, and the corresponding first connecting ears and the second connecting ears are connected by fastening bolts. The rotating impeller has a rotating ring, which is rotatably assembled between the first adapter ring and the second adapter ring.

[0009] Furthermore, the swirl guide tube includes a conveying tube made of metal or rubber material, and multiple spiral guide strips are constructed inside the conveying tube. These spiral guide strips are evenly arranged along the circumference of the conveying tube, and each spiral guide strip extends spirally along the axis of the conveying tube to both ends of the conveying tube. The material of the spiral guide strips is the same as that of the conveying tube.

[0010] Furthermore, each of the spiral guide strips is provided with a water channel extending along its spiral direction, and multiple water distribution holes are provided on each spiral guide strip; the humidity regulating pipe assembly includes a water distribution rubber main pipe with one end connected to the outlet end of the pressure water pump, and multiple water distribution rubber branch pipes are connected at intervals on the water distribution rubber main pipe, and the number of water distribution rubber branch pipes is the same as the number of spiral guide strips. A water inlet control valve is installed on each water distribution rubber branch pipe, and each water distribution rubber branch pipe is connected to the water channel of the corresponding spiral guide strip.

[0011] Furthermore, the adjustable bidirectional discharge head includes a discharge nozzle with a first connector and a second connector. The first connector and the second connector are constructed at both axial ends of the discharge nozzle, and one of the first connector and the second connector is detachably connected to the end of the cyclone guide tube. A flared mouth is coaxially constructed inside the discharge nozzle. The diameter of the flared mouth gradually expands from the first connector along the axis of the discharge nozzle towards the second connector. A separation cavity is formed between the outer wall of the flared mouth and the inner wall of the discharge nozzle. A discharge sleeve is rotatably fitted outside the discharge nozzle and near the first connector. A plurality of first through holes are spaced apart on the peripheral wall of the part of the discharge nozzle near the first connector. The separation cavity communicates with the discharge sleeve through these first through holes.

[0012] Furthermore, a transition cavity is formed between the discharge sleeve and the discharge nozzle, and a slag discharge pipe communicating with the transition cavity is installed on the discharge sleeve. The slag discharge pipe is a tubular structure made of rubber material, and a slag discharge valve is installed on the slag discharge pipe.

[0013] Furthermore, the diameter of the discharge sleeve gradually decreases along its axis toward the vortex guide tube, and a plurality of second guide holes are uniformly opened on the peripheral wall of the discharge sleeve along its circumference, and the number of second guide holes is the same as the number of first guide holes; when the second guide holes on the discharge sleeve partially overlap or completely overlap with the first guide holes on the discharge nozzle, the separation chamber is connected to the outside; when the second guide holes are completely offset from the first guide holes, the separation chamber is isolated from the outside.

[0014] The present invention, by employing the aforementioned structure, achieves the following technological advancements compared to existing technologies: The present invention uses a conveying pump to sequentially input concrete into a guide hose, an elastic vibrating pipe, a vortex guide hose, and an adjustable bidirectional discharge head, before discharging it through the adjustable bidirectional discharge head and pouring it into the pouring cavity. When the concrete flows through the elastic vibrating pipe of the present invention, the pipe undergoes elastic vibration, serving as a primary vibration. During this vibration, air bubbles within the concrete are gradually dispersed, preventing the presence of large air bubbles after pouring into the pouring cavity and avoiding the formation of numerous cavities after concrete solidification, which could reduce the quality of the project. Furthermore, in subsequent vibration operations, small air bubbles are easily vibrated out, and even if some small air bubbles remain in the concrete, it will not affect the quality of the project. Large air bubbles, however, are difficult to completely expel during vibration operations, easily resulting in cavities and affecting the quality of the project. During the flow of concrete through the cyclone guide pipe, large particles of gravel are incorporated into the concrete mixing process. Under the action of centrifugal force, these large particles gradually shift to the outside of the cyclone guide pipe and are separated at the adjustable bidirectional discharge head, preventing them from entering the pouring cavity and affecting the quality of the concrete. Furthermore, this invention allows for targeted pouring methods at different locations within the pouring cavity, tailored to specific needs. For example, when pouring near the end of the pouring cavity or into areas that can be rapidly injected via overflow, the pumping pressure of the concrete is reduced to avoid excessive air bubbles, resulting in low-pressure pouring into the cavity. Additionally, the expansion end of the adjustable bidirectional discharge head faces outwards, allowing the concrete to be injected into the cavity in a low-pressure, diffused flow, thus improving pouring efficiency. When pouring concrete into the far end of the pouring cavity or into areas within the cavity that cannot or are not easily poured via overflow, the constriction end of the adjustable bidirectional discharge head is oriented outwards to increase the concrete conveying pressure. This allows the concrete to be precisely jetted into the predetermined area in a bundle (not a diffused flow). Since the jetting generates a certain amount of air bubbles, the area needs to be thoroughly vibrated to remove these bubbles. This invention can increase the humidity of the concrete. Specifically, when the concrete humidity is below a predetermined range, water is added to the vortex guide pipe through a humidity regulating pipe assembly. During the vortex conveying process within the vortex guide pipe, the concrete mixes quickly and thoroughly with the added water, ensuring the concrete remains homogeneous before exiting the adjustable bidirectional discharge head. In summary, this invention is handheld by construction personnel and allows for pressurization and depressurization of the concrete as needed, achieving the purpose of pouring different areas within irregular pouring cavities. It also allows for adjustment of the poured concrete's shape, improving pouring efficiency and effectively preventing the mixing of concrete with air, thereby improving project quality. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0016] In the attached diagram: Figure 1 This is an axial structural cross-sectional view of an embodiment of the present invention; Figure 2 This is a partial structural cross-sectional view of the adjustable bidirectional discharge head according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first type of discharge sleeve with slag discharge pipe and two sealing rings after disassembly in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the second type of discharge sleeve with multiple second through holes and two sealing rings after disassembly according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the material guide tube, connecting tube, rotating impeller, and active impact component according to an embodiment of the present invention. Figure 6 This is a schematic diagram of the connection between the cyclone guide tube and the humidity regulating tube assembly in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the present invention connected to the adjusting arm in an embodiment; Figure 8 This is a schematic diagram of the connection between the first connector and the cyclone guide tube in the adjustable bidirectional discharge head according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the connection between the second connector and the cyclone guide tube in the adjustable bidirectional discharge head of an embodiment of the present invention.

[0017] Components labeled: 301-Conveying pipe, 302-Connecting assembly, 3021-Fixing sleeve, 3022-Connecting rod, 303-Guide hose, 304-Feed control valve, 305-Adjustable bidirectional discharge head, 3051-Discharge nozzle, 3052-First connector, 3053-Second connector, 3054-Flare nozzle, 3055-Separation chamber, 3056-First through hole, 3057-Discharge sleeve, 3058-Sealing ring, 3059-Second through hole, 306-Humidity regulating pipe assembly 3061-Water distribution rubber main pipe, 3062-Water distribution rubber branch pipe, 3063-Water inlet control valve, 307-Slag discharge pipe, 308-Slag discharge valve, 309-Transition chamber, 310-Spiral guide bar, 311-Water guide channel, 312-Operating handle, 313-Connecting pipe, 314-Passive striking component, 315-Rotating impeller, 316-Active striking component, 317-First transition ring, 318-First connecting ear, 319-Second transition ring, 320-Second connecting ear, 321-Adjusting arm. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of the invention.

[0019] This invention discloses a handheld concrete pouring device for use in confined spaces, such as... Figure 1-9As shown, the system includes a material guiding hose 303, an elastic vibrating pipe, a swirl material guiding pipe, and an adjustable bidirectional discharge head 305, which are connected sequentially along the flow direction of the concrete. The inlet end of the material guiding hose 303 is connected to the outlet of the conveying pump, and the inlet of the conveying pump is connected to the outlet of the concrete mixing plant. A feed control valve 304 is installed at the end of the material guiding hose 303 near the elastic vibrating pipe, and a humidity regulating pipe assembly 306 is installed on the swirl material guiding pipe. The working principle and advantages of this invention are as follows: This invention uses a conveying pump to sequentially input concrete into a guide pipe 303, an elastic vibrating pipe, a vortex guide pipe, and an adjustable bidirectional discharge head 305, and then discharges it through the adjustable bidirectional discharge head 305 before pouring it into the pouring cavity. When the concrete flows through the elastic vibrating pipe of this invention, the elastic vibrating pipe undergoes elastic vibration, playing a primary vibration role. During the elastic vibration process, air bubbles in the concrete are gradually dispersed, so that after pouring into the pouring cavity, there are no large air bubbles in the concrete, avoiding the presence of many cavities after the concrete solidifies, which would reduce the quality of the project. Moreover, in subsequent vibration operations, small air bubbles are easily vibrated out, and even if some small air bubbles remain in the concrete, it will not affect the quality of the project. However, large air bubbles are difficult to completely expel during vibration operations, and it is very easy for some large air bubbles to remain, resulting in cavities and affecting the quality of the project. During the flow of concrete through the cyclone guide pipe, large particles of gravel are incorporated into the concrete mixing process. Under the action of centrifugal force, these large particles gradually shift to the outside of the cyclone guide pipe and are separated at the adjustable bidirectional discharge head 305, preventing them from entering the pouring cavity and affecting the quality of the concrete. Furthermore, this invention allows for targeted pouring methods at different locations within the pouring cavity as needed. Specifically, when pouring near the end of the pouring cavity or areas within the cavity that can be rapidly injected via overflow, to avoid excessive air bubble generation, the pumping pressure of the concrete is reduced, resulting in low-pressure pouring into the pouring cavity. Additionally, the expansion end of the adjustable bidirectional discharge head 305 is oriented outwards, thus injecting the concrete into the pouring cavity in a low-pressure, diffused flow manner, improving pouring efficiency. When pouring concrete into the far end of the pouring cavity or into areas within the pouring cavity that cannot or are not easily poured by overflow, the constriction end of the adjustable bidirectional discharge head 305 is oriented outward to increase the concrete conveying pressure. This allows the concrete to be precisely jetted into the predetermined area in a bundle (not a diffused flow). Since the jetting generates a certain amount of air bubbles, the area needs to be thoroughly vibrated to remove these bubbles. This invention can increase the humidity of the concrete. Specifically, when the humidity of the concrete is below a predetermined range, water is added to the vortex guide pipe through the humidity regulating pipe assembly 306. During the vortex conveying process within the vortex guide pipe, the concrete mixes quickly and thoroughly with the added water, ensuring that the concrete remains homogeneous before being discharged from the adjustable bidirectional discharge head 305.In summary, this invention is adaptable to handheld use by construction workers and allows for pressurization and depressurization of concrete as needed, achieving the purpose of pouring different areas within irregular pouring cavities. It also allows for adjustment of the poured concrete's shape, improving pouring efficiency and effectively preventing the mixing of concrete with air, thereby improving project quality. To prevent prolonged handling by construction workers, an adjusting arm 321 is installed between the material guide hose 303 and the elastic vibrating tube. The adjusting arm 321 adjusts the curvature of the material guide hose 303, adapting it to confined spaces. Furthermore, the adjusting arm 321 can be attached to the side formwork or other components, reducing the intensity of the work and preventing the material guide hose 303 from swinging or swaying.

[0020] As a preferred embodiment of the present invention, such as Figure 1 , 5As shown, the elastic vibrating tube includes a connecting pipe 313, a rotating impeller 315, an active striking element 316, and multiple passive striking elements 314. The rotating impeller 315 is rotatably mounted between the feed guide tube 303 and the connecting pipe 313. The active striking element 316 is mounted on the rotating impeller 315 and extends into the connecting pipe 313 along its axis. The multiple passive striking elements 314 are disposed on the inner wall of the connecting pipe 313 and are spaced apart circumferentially along the connecting pipe 313. When the active striking element 316 rotates with the rotating impeller 315, it intermittently strikes the passive striking elements 314. The working principle and advantages of this embodiment are as follows: During the process of concrete under certain pressure entering the connecting pipe 313 through the rotating impeller 315, the rotating impeller 315 is driven to rotate the active striking element 316. The active striking element 316 intermittently strikes each passive striking element 314 during rotation, thereby generating vibration. This causes pulse vibration of the gas mixed in the concrete and disperses large air bubbles within the concrete. The active striking element 316 in this embodiment includes a conical spring extending along the axis of the connecting pipe 313. The small-diameter end of the conical spring is fixedly connected to the rotating impeller 315, and the large-diameter end extends to the passive striking element 314. The passive striking element 314 in this embodiment includes a toothed structure. The tips of the teeth extend radially inward along the connecting pipe 313, and the end face of the toothed structure near the conical spring is an inclined guide surface. Because the active striking element 316 in this embodiment is a conical spring, the concrete is disturbed from the inside out by the conical spring as it passes through the connecting pipe 313. The large-diameter end of the conical spring intermittently collides with the toothed structure, generating elastic vibrations that break and disperse air bubbles. Due to the toothed structure in this embodiment, and the fact that the tip size of the tooth is smaller than the root size, the large-diameter end of the conical spring is prevented from getting stuck at the root of the tooth. Furthermore, because the end face of the toothed structure near the conical spring is an inclined guide surface, the conical spring is driven and elastically elongates when the concrete pressure increases. This allows the large-diameter end of the conical spring to smoothly extend into the position of the toothed structure, preventing it from getting stuck between these toothed structures and unable to rotate. In this embodiment, the rotating impeller 315 is connected to the guide tube 303 and the connecting tube 313 in the following manner: a first adapter ring 317 and a second adapter ring 319 are respectively constructed at the ends of the connecting tube 313 and the guide tube 303 that are close to each other. A plurality of first connecting ears 318 are evenly constructed on the first adapter ring 317 along its circumference, and a plurality of second connecting ears 320 are evenly constructed on the second adapter ring 319 along its circumference. The first connecting ears 318 and the second connecting ears 320 are arranged in a one-to-one correspondence, and the corresponding first connecting ears 318 and the second connecting ears 320 are connected by fastening bolts.In this embodiment, a rotating ring is coaxially mounted on the outer circumference of the rotating impeller 315. This rotating ring is rotatably assembled between the first transition ring 317 and the second transition ring 319. In this embodiment, a connecting assembly 302 connects the conveying pipe 301 and the guiding hose 303. This connecting assembly 302 includes a connecting rod 3022 and two fixing sleeves 3021. These two fixing sleeves 3021 are respectively fitted and fixed onto the conveying pipe 301 and the guiding hose 303, and the connecting rod 3022 connects the two fixing sleeves 3021. Construction personnel can move the entire device by lifting the connecting rod 3022.

[0021] As a preferred embodiment of the present invention, such as Figure 1 , 6 As shown, the swirling material guide pipe includes a conveying pipe 301, which is made of metal or rubber. Multiple spiral guide strips 310 are constructed inside the conveying pipe 301. These spiral guide strips 310 are evenly arranged circumferentially along the conveying pipe 301, and each spiral guide strip 310 extends spirally along the axis of the conveying pipe 301 to both ends. The material of the spiral guide strips 310 is the same as that of the conveying pipe 301. The working principle and advantages of this embodiment are: when concrete enters the conveying pipe 301, under the action of the spiral guide strips 310, the concrete swirls through the conveying pipe 301, causing larger particles of gravel in the concrete to gradually shift to the inner wall of the conveying pipe 301 and be separated at the adjustable bidirectional discharge head 305. This embodiment has an operating handle 312 on the conveying pipe 301 for a construction worker to carry. When the pressure of the concrete increases, it is not easy for a single person to operate stably. Two people are required to hold it, that is, one construction worker holds the operating handle 312 and the other construction worker holds the connecting rod 3022.

[0022] As a preferred embodiment of the present invention, such as Figure 1 , 6As shown, each spiral guide bar 310 has a water channel 311 extending along its spiral direction, and each spiral guide bar 310 has multiple water distribution holes. The humidity regulating pipe assembly 306 of this embodiment includes a main water distribution rubber pipe 3061 and multiple branch water distribution rubber pipes 3062. One end of the main water distribution rubber pipe 3061 is connected to the outlet end of a pressure water pump. The branch water distribution rubber pipes 3062 are spaced apart and connected to the main water distribution rubber pipe 3061. The number of branch water distribution rubber pipes 3062 is the same as the number of spiral guide bars 310. A water inlet control valve 3063 is installed on each branch water distribution rubber pipe 3062, and each branch water distribution rubber pipe 3062 is connected to the corresponding water channel 311 of the spiral guide bar 310. The working principle and advantages of this embodiment are as follows: When adjusting the humidity of the concrete, one or more water distribution rubber branch pipes 3062 are opened according to the degree of humidity deviation, so that one or more water distribution rubber branch pipes 3062 can humidify the concrete in the delivery pipe 301. Moreover, since the concrete is transported in a swirling manner in the delivery pipe 301, it promotes thorough mixing of the concrete and the added water, thereby improving the mixing efficiency and mixing effect.

[0023] As a preferred embodiment of the present invention, such as Figure 1 , 2As shown, the adjustable bidirectional discharge head 305 includes a discharge nozzle 3051, a bell mouth 3054, and a discharge sleeve 3057. A first connector 3052 and a second connector 3053 are constructed on the discharge nozzle 3051, located at both axial ends of the nozzle. The axes of the first connector 3052, the second connector 3053, and the discharge nozzle 3051 coincide, and one of the first connector 3052 and the second connector 3053 can be detachably connected to the end of a cyclone guide tube. In this embodiment, the flared nozzle 3054 is constructed inside the discharge nozzle 3051, and the axis of the flared nozzle 3054 coincides with that of the discharge nozzle 3051. The diameter of the flared nozzle 3054 gradually expands from the first connector 3052 along the axis of the discharge nozzle 3051 toward the second connector 3053. A separation cavity 3055 is formed between the outer wall of the flared nozzle 3054 and the inner wall of the discharge nozzle 3051. In this embodiment, the discharge sleeve 3057 is rotatably fitted outside the discharge nozzle 3051, and the discharge sleeve 3057 is located near the first connector 3052. A plurality of first through holes 3056 are spaced apart on the peripheral wall of the portion of the discharge nozzle 3051 near the first connector 3052. The separation cavity 3055 communicates with the discharge sleeve 3057 through these first through holes 3056. The working principle and advantages of this embodiment are as follows: When a diffused pouring operation is required, the first connector 3052 is connected to the end of the vortex guide pipe. In this way, the concrete moves from the small-diameter end of the flared nozzle 3054 to the large-diameter end, causing the concrete to gradually disperse and be discharged through the second connector 3053, achieving the purpose of expanding the flow. Large-diameter gravel within the concrete gradually accumulates in the separation chamber 3055 and enters the discharge sleeve 3057 through the first through-hole 3056, intermittently connecting the discharge sleeve 3057 to the outside, allowing the gravel within the discharge sleeve 3057 to be discharged. When a compressed pouring operation is required, the second connector 3053 is connected to the end of the vortex guide pipe. In this way, the concrete moves from the large-diameter end of the flared nozzle 3054 to the small-diameter end, causing the concrete to gradually converge and be discharged through the second connector 3053, achieving the purpose of contracting the flow. In this embodiment, sealing rings 3058 are respectively provided at both axial ends of the discharge sleeve 3057. These two sealing rings 3058 are fitted onto corresponding positions of the discharge nozzle 3051, so that the discharge sleeve 3057 and the discharge nozzle 3051 are rotatably connected, and the axial ends of the discharge sleeve 3057 are isolated from the outside. In this embodiment, the discharge sleeve 3057 is connected to the outside in two ways. The first way is as follows: Figure 3As shown, a transition cavity 309 is formed between the discharge sleeve 3057 and the discharge nozzle 3051. A slag discharge pipe 307 communicating with the transition cavity 309 is installed on the discharge sleeve 3057. The slag discharge pipe 307 is a tubular structure made of rubber material, and a slag discharge valve 308 is installed on the slag discharge pipe 307. In this embodiment, by opening the slag discharge valve 308, the transition cavity 309 is connected to the outside through the slag discharge pipe 307, thereby allowing the crushed stone entering the transition cavity 309 to be smoothly discharged through the slag discharge pipe 307. The second method, as... Figure 4 As shown, the inner peripheral wall of the discharge sleeve 3057 is fitted together with the outer peripheral wall of the cyclone guide tube at the corresponding position. The diameter of the discharge sleeve 3057 gradually decreases towards the cyclone guide tube along its axis. Multiple second through holes 3059 are evenly formed along the circumference of the peripheral wall of the discharge sleeve 3057, and the number of second through holes 3059 is the same as the number of first through holes 3056. When the second through holes 3059 on the discharge sleeve 3057 partially or completely overlap with the first through holes 3056 on the discharge nozzle 3051, the separation chamber 3055 communicates with the outside; when the second through holes 3059 and the first through holes 3056 are completely misaligned, the separation chamber 3055 is isolated from the outside. The working principle of this embodiment is as follows: Figure 8 As shown, when the first connector 3052 is connected to the vortex guide pipe, the concrete is amplified and discharged. The rotating discharge sleeve 3057 connects the first guide hole 3056 and the second guide hole 3059, allowing the crushed stone to be discharged through the discharge sleeve 3057 in the opposite direction of pouring, preventing it from mixing into the pouring cavity. Figure 9 As shown, when the concrete is constricted, the second connector 3053 is connected to the vortex guide pipe, and the discharge sleeve 3057 is rotated so that the discharge sleeve 3057 closes all the first guide holes 3056. In this way, the concrete is constricted (converged) after passing through the bell mouth 3054. Moreover, when it is necessary to increase the pouring range, the discharge sleeve 3057 is rotated so that the first guide hole 3056 and the second guide hole 3059 are open. In this way, the concrete is discharged into the pouring cavity through the bell mouth 3054 and the second guide hole 3059 respectively.

[0024] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A handheld concrete pouring device for use in confined spaces, characterized in that: The system includes a guide hose, an elastic vibrating tube, a swirl guide hose, and an adjustable bidirectional discharge head, connected sequentially along the flow direction of the concrete. The inlet end of the guide hose is connected to the outlet of a conveying pump, and the inlet of the conveying pump is connected to the outlet of the concrete mixing plant. A feed control valve is installed at the end of the guide hose near the elastic vibrating tube, and a humidity regulating pipe assembly is installed on the swirl guide hose. The elastic vibrating tube includes a rotating impeller rotatably mounted between the guide hose and a connecting pipe. An active striking element is installed on the rotating impeller and extends into the connecting pipe. Multiple passive striking elements are spaced circumferentially on the inner wall of the connecting pipe, and when the active striking element rotates with the rotating impeller, the active striking element intermittently strikes the passive striking elements. The active striking element includes a conical spring extending along the axis of the connecting pipe. The small-diameter end of the conical spring is fixedly connected to the rotating impeller, and the large-diameter end of the conical spring extends... To the passive striking component; the passive striking component includes a toothed structure, the tips of which extend radially inward along the connecting pipe, and the end face of the toothed structure near the conical spring is an inclined guide surface; the adjustable bidirectional discharge head includes a discharge nozzle with a first connector and a second connector, the first connector and the second connector being constructed at both axial ends of the discharge nozzle, and one of the first connector and the second connector being detachably connected to the end of the swirling guide pipe, a flared mouth being coaxially constructed inside the discharge nozzle, the diameter of the flared mouth gradually expanding from the first connector along the axis of the discharge nozzle towards the second connector, a separation cavity being formed between the outer wall of the flared mouth and the inner wall of the discharge nozzle, a discharge sleeve being rotatably fitted outside the discharge nozzle and near the first connector, and a plurality of first through holes being spaced apart on the peripheral wall of the part of the discharge nozzle near the first connector, the separation cavity communicating with the discharge sleeve through these first through holes.

2. The handheld pouring device for concrete pouring in confined spaces according to claim 1, characterized in that: A first adapter ring and a second adapter ring are respectively constructed at the ends of the connecting tube and the guide tube that are close to each other. A plurality of first connecting ears are evenly constructed on the first adapter ring along its circumference, and a plurality of second connecting ears are evenly constructed on the second adapter ring along its circumference. The first connecting ears and the second connecting ears are arranged in a one-to-one correspondence, and the corresponding first connecting ears and the second connecting ears are connected by fastening bolts. The rotating impeller has a rotating ring, which is rotatably assembled between the first adapter ring and the second adapter ring.

3. The handheld pouring device for concrete pouring in confined spaces according to claim 1, characterized in that: The swirl guide tube includes a conveying tube made of metal or rubber material, and multiple spiral guide strips are constructed inside the conveying tube. These spiral guide strips are evenly arranged along the circumference of the conveying tube, and each spiral guide strip extends spirally along the axis of the conveying tube to both ends of the conveying tube. The material of the spiral guide strips is the same as that of the conveying tube.

4. The handheld pouring device for concrete pouring in confined spaces according to claim 3, characterized in that: Each of the spiral guide bars has a water channel extending along its spiral direction, and multiple water distribution holes are opened on each spiral guide bar; the humidity regulating pipe assembly includes a water distribution rubber main pipe with one end connected to the outlet end of the pressure water pump, and multiple water distribution rubber branch pipes are connected at intervals on the water distribution rubber main pipe, and the number of water distribution rubber branch pipes is the same as the number of spiral guide bars. A water inlet control valve is installed on each water distribution rubber branch pipe, and each water distribution rubber branch pipe is connected to the water channel of the corresponding spiral guide bar.

5. A handheld pouring device for concrete pouring in confined spaces according to claim 1, characterized in that: A transition cavity is formed between the discharge sleeve and the discharge nozzle. A slag discharge pipe communicating with the transition cavity is installed on the discharge sleeve. The slag discharge pipe is a tubular structure made of rubber material, and a slag discharge valve is installed on the slag discharge pipe.

6. A handheld pouring device for concrete pouring in confined spaces according to claim 1, characterized in that: The diameter of the discharge sleeve gradually decreases along its axis toward the vortex guide tube. Multiple second guide holes are evenly opened on the peripheral wall of the discharge sleeve along its circumference, and the number of second guide holes is the same as the number of first guide holes. When the second guide holes on the discharge sleeve partially overlap or completely overlap with the first guide holes on the discharge nozzle, the separation chamber is connected to the outside. When the second guide holes are completely offset from the first guide holes, the separation chamber is isolated from the outside.

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