CN113482353A

CN113482353A - Safety device for preventing concrete at concrete conveying pipe terminal from splashing

Info

Publication number: CN113482353A
Application number: CN202110809930.1A
Authority: CN
Inventors: 尚丽娜
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-17
Filing date: 2021-07-17
Publication date: 2021-10-08

Abstract

The invention relates to the technical field of concrete conveying pipes, in particular to a safety device for preventing concrete at the terminal of a concrete conveying pipe from splashing. The invention aims to solve the technical problems that the discharge amount cannot be adjusted, the disassembly and the assembly are inconvenient, and the pipeline cannot be reinforced. In order to solve the problems in the prior art, the invention provides a safety device for preventing concrete at the end of a concrete conveying pipe from splashing, which consists of a fastening installation mechanism and a flow guide adjusting mechanism, and can effectively prevent concrete from segregating in the conveying pipe, disperse the punching force of the concrete on the pipeline, prevent the concrete from being broken from the end of the pipeline, fasten the end of the conveying pipe and adapt to conveying pipes with different calibers by the matching between the matching of bolts and nuts among a bearing, a sealing sleeve, a rotating shaft, a flow limiting plate, a sleeve, a loop bar, a fastening fork, a rotating shaft, an installation plate, a wedge block, a flow guiding pipe, a discharging pipe and an elastic baffle plate, thereby improving the application range of the device.

Description

Safety device for preventing concrete at concrete conveying pipe terminal from splashing

Technical Field

The invention relates to the technical field of concrete conveying pipes, in particular to a safety device for preventing concrete at the terminal of a concrete conveying pipe from splashing.

Background

The common concrete is artificial stone which is prepared by taking cement as a main cementing material, adding water, sand, stones and chemical additives and mineral admixtures if necessary, mixing the materials according to a proper proportion, uniformly stirring, densely molding, curing and hardening. Concrete is mainly divided into two stages and states: plastic state before setting and hardening, namely fresh concrete or concrete mixture; hardened, i.e. hardened concrete or concrete.

The prior patent (publication number: CN103031956B) discloses a safety device for preventing concrete at the end of a concrete conveying pipe from splashing, wherein the end of the concrete conveying pipe is a terminal hose, the safety device comprises a fixing piece fixed on the terminal hose and a collecting container matched with the fixing piece, the fixing piece is an annular structure closely matched and connected with the outer diameter of the terminal hose, and the fixing piece and the collecting container are connected in a snap fit manner. According to the invention, the tail end of the terminal hose of the concrete pump truck conveying pipe is sleeved with the fixing part matched with the terminal hose and the collecting container, so that the function of preventing concrete from splashing can be realized. The device simple structure, low in cost can fix on the mounting boss of terminal hose through the fixed slot, only needs rotatory certain angle can easily realize the dismouting during use, easy operation, application convenience, the inventor finds the following problem and does not obtain good solution in the in-process that realizes this scheme among the prior art: 1. the device does not have the reinforcing effect on the conveying pipeline, and is easily washed away by concrete when in use, so that the device is damaged; 2. the device is inconvenient to disassemble, assemble and clean after being used, and is easy to damage once blockage occurs; 3. the device only can play the shutoff effect when using, need pull down the device and expose the conveyer pipe terminal when carrying out concrete placement, install the device again when pouring the completion, prevent that remaining concrete in the conveyer pipe from flowing out, and this process is comparatively loaded down with trivial details.

Disclosure of Invention

The invention aims to provide a safety device for preventing concrete at the end of a concrete conveying pipe from splashing, which solves the problems that the device is easy to be washed away by concrete when in use, is damaged, is inconvenient to disassemble, assemble and clean, is easy to damage, needs to be disassembled and assembled for many times during use, increases the workload of operators and is time-consuming by arranging a fastening installation mechanism and a flow guide adjusting mechanism.

In order to achieve the purpose, the invention provides the following technical scheme: a safety device for preventing concrete at the end of a concrete conveying pipe from splashing comprises a fastening installation mechanism and a flow guide adjusting mechanism, wherein the fastening installation mechanism comprises a box body, a fastening fork, a threaded rod and a connecting pipe, a discharge hole is formed in a bottom plate of the box body, a threaded hole is formed in one side plate of the box body, a support plate is horizontally and fixedly connected between the inner walls of front and rear baffles of the box body, the fastening fork is movably installed in the support plate in a penetrating mode, the threaded rod is fixedly connected to one end of the fastening fork, fastening threads are arranged at one end of the threaded rod and are in threaded connection with the threaded hole of the box body, a limiting disc and a rotating disc are fixedly sleeved at one end, away from the fastening fork, of the threaded rod respectively, a limiting disc and a rotating disc are fixedly connected to one end of the limiting disc, and the threaded rod is connected with a fixing nut through the fastening threads, the rotary table is fixedly connected with a rotating handle, the outer surface of the sleeve is contacted with one end of the fastening fork, the sleeve is detachably sleeved with a connecting pipe, the connecting pipe is fixedly connected with the bottom of the inner wall of the box body, the gap between the supporting plate and the connecting pipe is larger than the thickness of the sleeve pipe wall, the guide adjusting mechanism comprises a guide pipe, a mounting plate, a handle, a supporting column and a bearing, the number of the guide pipe is two, one guide pipe is fixedly connected with the bottom end face of the box body, the other guide pipe is detachably connected with the guide pipe fixed on the bottom end face of the box body, the inner walls of the two guide pipes are both fixedly connected with wedge blocks, the mounting plates are both fixedly connected with the outer surfaces of the two sides of the guide pipe, the mounting plates are provided with through holes, nuts are fixedly sleeved in the through holes of the mounting plates, and are in threaded connection with bolts, the two guide pipes are connected through nut threads, the bottoms of the two guide pipes are respectively fixedly connected with external threaded pipes, the external threaded pipes are connected with internal threaded pipes through threads, the outer surfaces of the two sides of the internal threaded pipes are fixedly connected with handles and support columns, the top ends of the support columns are fixedly connected with the handles, the bottoms of the internal threaded pipes are fixedly connected with elastic baffle plates, the bottom ends of the internal threaded pipes are fixedly connected with discharge pipes, the two discharge pipes are connected through bolts and nut threads, the two discharge pipes are horizontally and rotatably connected with a rotating shaft through a bearing, a seal sleeve is fixedly sleeved on the rotating shaft and is contacted with the inner ring of the bearing, a flow limiting plate is fixedly connected on the rotating shaft, one end of the rotating shaft horizontally and movably penetrates through the discharge pipes, and one end of the rotating shaft is fixedly connected with a sleeve, the sleeve is connected with a loop bar in a rotating mode, the loop bar is connected with a fixed clamping block in a buckling mode, and the fixed clamping block is fixedly connected to the outer surface of the discharging pipe.

Preferably, the number of the wedge-shaped blocks is eight, and the eight wedge-shaped blocks are symmetrically distributed under the connecting pipe in a staggered manner.

Preferably, the bearings are ball bearings, and two of the bearings are horizontally and symmetrically distributed on two sides of the flow limiting plate.

Preferably, the joints of the two guide pipes and the discharge pipes, the nut and the bearing are respectively bonded with a sealing cotton strip.

Preferably, the elastic baffle is an aluminum alloy elastic plate, the number of the elastic baffle is four, four the elastic baffle is evenly arranged in the discharging pipe at intervals, the cross section of the elastic baffle is arc-shaped, and the bottom end of the elastic baffle faces the center of the discharging pipe.

Preferably, install the sealing strip between external screw thread pipe and the internal thread pipe, external screw thread pipe and internal thread pipe are the aluminum alloy body.

Preferably, the flow limiting plate is in a shape of a circular disc, and when the loop bar is fastened on the fixed clamping block for fixing, the flow limiting plate can plug the discharge pipe; the flow limiting plate is an inhomogeneous plate, and the weight of the flow limiting plate on one side of the rotating shaft is larger than that of the flow limiting plate on the other side of the rotating shaft, so that the flow limiting plate is in a vertical state when the loop bar is in a free state. .

Preferably, the fixed clamping block is a locking type clamping block, and the sleeve rod buckled on the fixed clamping block can be fixed by the fixed clamping block.

Preferably, the connecting pipe is an aluminum alloy pipe and is located at the center of the bottom of the inner wall of the box body.

Preferably, the guide pipe and the discharge pipe are both stainless steel pipes, and the caliber of the guide pipe is the same as that of the discharge pipe.

Compared with the prior art, the invention has the beneficial effects that:

(1) through the arrangement of the flow guide adjusting mechanism, the device is matched with the fixed fixture block through the bearing, the sealing sleeve, the rotating shaft, the flow limiting plate, the sleeve rod and the fixed fixture block, when pouring is needed, the sleeve rod is released from the fixed fixture block, a discharge channel of the discharge pipe is exposed, when pouring is not needed, the sleeve rod is fixed on the fixed fixture block, the discharge pipe is blocked by the flow limiting plate, residual concrete in the delivery pipe cannot flow out, and the problem that the existing safety device needs to be disassembled for multiple times is solved;

(2) by arranging the fastening and mounting mechanism, the device can fasten and mount the terminal of the conveying pipe and can adapt to conveying pipes with different calibers by matching the supporting plate, the fastening fork, the rotating shaft, the mounting plate, the bolt and the nut, the effect of improving the applicability of the device is improved, and the problem that the application range is small because the conventional safety device cannot be well fastened and connected with the conveying pipes and the specification is fixed during mounting is solved;

(3) through setting up water conservancy diversion adjustment mechanism for this device has reached the punching press force that can disperse the pipeline of concrete when carrying through wedge, honeycomb duct, external screw thread pipe, internal thread pipe, discharging pipe and the cooperation between the elastic baffle, plays the effect that this device of protection can not be broken from pipeline terminal department, has solved the problem of the impulsive force that produces when current safety device can not effectually alleviate the concrete ejection of compact.

(4) Through setting up the wedge, increased flow path and the flow velocity of concrete in honeycomb duct and discharging pipe for aggregate in the concrete mixes at the in-process that flows, solves the segregation problem that can lead to because of the conveyer pipe overlength when concrete placement now.

Drawings

FIG. 1 is a schematic sectional front view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic view of the connection structure of the sleeve, the loop bar and the fixed fixture block of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 1;

fig. 5 is a schematic view of the enlarged structure at B in fig. 1 according to the present invention.

In the figure: 1. a box body; 2. a support plate; 3. a fastening fork; 4. a threaded rod; 5. a limiting disc; 6. a turntable; 7. fixing a nut; 8. turning a handle; 9. a sleeve; 10. a connecting pipe; 12. a flow guide pipe; 1201. a wedge block; 13. mounting a plate; 14. an externally threaded tube; 15. a handle; 16. a support pillar; 17. an internally threaded tube; 18. a discharge pipe; 19. an elastic baffle plate; 20. sealing the cotton sliver; 21. a bolt; 22. a nut; 23. a bearing; 24. sealing sleeves; 25. a rotating shaft; 2501. a restrictor plate; 26. a sleeve; 27. a loop bar; 28. and fixing the clamping block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, an embodiment of the present invention is shown: a safety device for preventing concrete at the end of a concrete conveying pipe from splashing comprises a fastening installation mechanism and a flow guide adjusting mechanism, wherein a rigid sleeve 9 is connected to the end of a flexible conveying pipe.

The fastening and mounting mechanism comprises a box body 1, a fastening fork 3, a threaded rod and a connecting pipe 10, a discharge hole is formed in a bottom plate of the box body 1, a threaded hole is formed in one side plate of the box body 1, a supporting plate 2 is horizontally and fixedly connected between the inner walls of a front baffle and a rear baffle of the box body 1, the fastening fork 3 is movably installed in a penetrating manner by the supporting plate 2, the threaded rod 4 is fixedly connected with one end of the fastening fork 3, a fastening thread is arranged at one end of the threaded rod 4, the threaded rod 4 is in threaded connection with the threaded hole of the box body 1, a limiting disc 5 and a rotating disc 6 are respectively and fixedly sleeved at one end of the threaded rod 4 far away from the fastening fork 3, one end face of the limiting disc 5 is fixedly connected with one end of the rotating disc 6, the threaded rod 4 is in threaded connection with a fixing nut 7 through the fastening thread, a rotating handle 8 is fixedly connected onto the rotating disc 6, the outer surface of a sleeve 9 is in contact with one end of the fastening fork 3, the connecting pipe 10 is detachably sleeved on the sleeve 9, connecting pipe 10 fixed connection is in the bottom of 1 inner walls of box, and the clearance between backup pad 2 and the connecting pipe 10 is greater than the pipe wall thickness of sleeve pipe 9, consequently fastens fork 3 and can fix the sleeve pipe 9 to certain pipe diameter within range, has improved this safety device's application scope.

The diversion adjusting mechanism comprises two diversion pipes 12, a mounting plate 13, a handle 15, a support column 16 and a bearing 23, wherein one diversion pipe 12 is fixedly connected to the bottom end face of the box body 1, the other diversion pipe 12 is detachably connected with the diversion pipe 12 fixed to the bottom end face of the box body 1, the detachable connection facilitates subsequent cleaning of the interior of the safety device, wedge blocks 1201 are fixedly connected to the inner walls of the two diversion pipes 12, the mounting plate 13 is fixedly connected to the outer surfaces of the two sides of the two diversion pipes 12, a through hole is formed in the mounting plate 13, a nut 22 is fixedly sleeved in the through hole of the mounting plate 13, the nut 22 is in threaded connection with a bolt 21, the two diversion pipes 12 are in threaded connection through the nut 22, the bottoms of the two diversion pipes 12 are respectively and fixedly connected with an external threaded pipe 14, the external threaded pipe 14 is in threaded connection with an internal threaded pipe 17, the handle 15 and the support column 16 are fixedly connected to the outer surfaces of the two sides of the internal threaded pipe 17, the top fixed connection of support column 16 is on handle 15, the bottom fixed connection of internal thread pipe 17 has elastic baffle 19, the bottom fixedly connected with discharging pipe 18 of internal thread pipe 17, discharging pipe 18 has two, two discharging pipes 18 pass through bolt 21 and nut 22 threaded connection, two discharging pipes 18 are connected with pivot 25 through the horizontal rotation of bearing 23, the fixed cover of having cup cover 24 on pivot 25 connects, cup cover 24 touches with the inner circle of bearing 23 mutually, fixedly connected with restrictor plate 2501 on the pivot 25, the horizontal activity of one end of pivot 25 runs through and installs on discharging pipe 18, the one end fixedly connected with sleeve 26 of pivot 25, the internal rotation of sleeve 26 is connected with loop bar 27, loop bar 27 buckle is connected with fixed fixture block 28, fixed fixture block 28 fixed connection is on the surface of discharging pipe 18. The setting of wedge makes the concrete of flowing through strike many times for aggregate in the concrete mixes at the in-process that flows, and the aggregate of large granule is for example great stone etc. is unlikely to very fast landing, has solved because of the different pouring segregation problems that cause of aggregate falling speed.

Specifically, the number of wedge 1201 is eight, and eight wedge 1201 misplace the symmetric distribution under connecting pipe 10, can solve on the one hand and pour the segregation problem, and on the other hand can effectually alleviate the produced impulsive force of concrete when exporting.

Specifically, the bearings 23 are ball bearings, and two of the bearings 23 are horizontally and symmetrically disposed on two sides of the restrictor plate 2501, and support and enable the rotation of the shaft 25.

Specifically, the sealed cotton strip 20 is bonded to the joints of the two flow tubes 12 and the two discharge tubes 18 with the nut 22 and the bearing 23, so that flash can be effectively prevented, and the two flow tubes and the two discharge tubes can be connected more tightly.

Specifically, elastic baffle 19 is the aluminum alloy elastic plate, and elastic baffle 19's quantity is four, and four elastic baffle intervals set up in the inside of discharging pipe 18 evenly, and elastic baffle 19's cross sectional shape is circular-arc, and elastic baffle 19's bottom all sets up towards the center of discharging pipe 18. When the flow rate of concrete in the discharge pipe 18 is low, the four elastic baffles 19 are close to each other, so that a discharge passage in the discharge pipe is reduced, and aggregates with different particle sizes and qualities in the pipeline are prevented from being separated; when the flow of the concrete in the discharge pipe 18 is slightly larger, the four elastic baffles 19 are far away from each other, so that the concrete can flow out conveniently.

Specifically, a sealing strip is installed between the external thread pipe 14 and the internal thread pipe 17, and both the external thread pipe 14 and the internal thread pipe 17 are aluminum alloy pipe bodies.

Specifically, the flow restriction plate 2501 is disc-shaped, and when the loop bar 27 is fastened on the fixed fixture block 28 for fixing, the flow restriction plate 2501 can block the discharge pipe 18; the restrictor plate 2501 is a non-uniform plate, and the weight of the restrictor plate on one side of the rotating shaft 25 is greater than the weight of the restrictor plate on the other side of the rotating shaft 25, so that the restrictor plate 25 is in a vertical state when the loop bar 27 is in a free state. In the scheme, when concrete pouring is needed, the loop bar 27 is released from the fixed fixture block 28, a discharge channel of the discharge pipe is exposed, and concrete can flow out of the discharge pipe; when pouring is not needed, the loop bar 27 is fixed on the fixed block 28, the flow restriction plate 2501 blocks the discharge pipe 18 at the moment, and the residual concrete in the delivery pipe cannot flow out, so that the residual concrete in the delivery pipe is prevented from dropping on the concrete pump truck. In addition, in the process of practical use, the flow of concrete in the discharge pipe 18 can be adjusted by controlling the rotation angle of the flow restriction plate 2501, and this can be realized by arranging a plurality of fixed fixture blocks on the outer wall of the discharge pipe, and those skilled in the art can set according to practical needs under the guidance of the idea of the solution, and the detailed description is omitted here.

Specifically, fixed fixture block 28 is the hasp formula fixture block, and fixed fixture block 28 can be fixed the loop bar of buckle on fixed fixture block 28, has guaranteed that current-limiting plate 2501 carries out the validity of shutoff to the discharging pipe.

Specifically, the connection pipe 10 is an aluminum alloy pipe, and the connection pipe 10 is located at the center of the bottom of the inner wall of the box body 1.

Specifically, the guide pipe 12 and the discharge pipe 18 are both stainless steel pipes, and the diameters of the guide pipe 12 and the discharge pipe 18 are the same, so that the butt joint of workers to the pipelines is facilitated.

The working principle is as follows: firstly, the turnplate 6 is rotated by the turning handle 8, so that the threaded rod 4 moves outwards, then the sleeve 9 connected with the terminal end of the flexible conveying pipe is sleeved on the connecting pipe 10, when the rotating disc 6 is rotated by the rotating handle 8, the threaded rod 4 moves inwards, the sleeve 9 is fixed and prevented from falling off when the concrete is conveyed, then the two diversion pipes 12 and the two discharge pipes 18 are installed by screwing the bolts 21 and the nuts 22, and then through the matching between the external thread pipes 14 and the internal thread pipes 17, the arrangement of the handles 15 and the supporting columns 16 is convenient for operators to connect the diversion pipes 12 and the discharge pipes 18 together, because the clearance between the supporting plate 2 and the connecting pipe 10 is larger than the pipe wall thickness of the sleeve 9, the sleeve in a certain pipe diameter range can be applied as long as the pipe wall can be clamped into the clearance between the supporting plate and the connecting pipe, and the application range of the safety device is improved.

When concrete pouring is required, the rotating sleeve 27 is rotated to rotate the rotating shaft 25 on the inner ring of the bearing 23, so that the rotating angle of the restrictor plate 2501 can be adjusted to adjust the discharge speed in the discharge pipe 18. Releasing the rods 27 allows the restrictor plate 2501 to remain vertical in its natural state, although the flowing concrete may impact the plate to cause it to rotate, but does not affect the discharge of the concrete. When concrete pouring is completed, the sleeve rod 27 is rotated and fixed on the fixed clamping block 28, and the flow limiting plate 2501 blocks the discharge pipe at the moment, so that concrete possibly remaining in the delivery pipe is prevented from dropping on the concrete pump truck. After a period of time, the sleeve 27 is released and the concrete collected in the re-tapping pipe is collected. Compared with the existing safety device for preventing concrete at the end of the concrete conveying pipe from splashing, the structure does not need to be installed and dismantled for many times, and is simple and efficient to use.

When concrete is conveyed, the concrete passes through the plurality of wedge blocks 1201, so that the flow paths and the flow speed of the concrete in the flow guide pipe and the discharge pipe are increased, aggregate in the concrete is mixed in the flowing process, and the problem of segregation caused by overlong conveying pipes in the conventional concrete pouring process is solved; then flows onto the elastic baffle plates 19, if the flow of the concrete in the discharge pipe 18 is small, the four elastic baffle plates 19 are close to each other, so that a discharge passage in the discharge pipe is reduced, and aggregates with different particle sizes and masses in the pipeline are further prevented from being separated; when the flow of the concrete in the discharge pipe 18 is slightly larger, the four elastic baffles 19 are far away from each other, so that the concrete can flow out conveniently.

When the safety device is required to be cleaned after being used for a period of time, the rotary disc 6 can be rotated to remove the restriction of the fastening fork 3 on the outer wall of the sleeve 9, the discharge pipe is detached from the flow guide pipe, and the discharge pipe and the flow guide pipe are detached respectively to clean the interior of the device.

In the description of the present invention, it is to be understood that the terms "center", "middle", "eccentric", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a prevent safety device that concrete conveying pipe terminal concrete splashes down which characterized in that: the flexible conveying pipe is connected with a rigid sleeve (9) at the terminal end, and the safety device comprises a fastening installation mechanism and a flow guide adjusting mechanism;

the fastening and mounting mechanism comprises a box body (1), a fastening fork (3), a threaded rod (4) and a connecting pipe (10), wherein a discharge hole is formed in a bottom plate of the box body (1), a threaded hole is formed in a side plate of the box body (1), a supporting plate (2) is horizontally and fixedly connected between the inner walls of front and rear baffles of the box body (1), the fastening fork (3) is movably installed in the supporting plate (2) in a penetrating mode, the threaded rod (4) is fixedly connected to one end of the fastening fork (3), fastening threads are arranged at one end of the threaded rod (4), the threaded rod (4) is in threaded connection with the threaded hole of the box body (1), a limiting disc (5) and a rotating disc (6) are fixedly sleeved at one end of the threaded rod (4) far away from the fastening fork (3), one end face of the limiting disc (5) is fixedly connected with one end of the rotating disc (6), and the threaded rod (4) is connected with a fixing nut (7) through the fastening threads, a rotating handle (8) is fixedly connected to the rotating disc (6), the outer surface of the sleeve (9) is in contact with one end of the fastening fork (3), the sleeve (9) is detachably sleeved with a connecting pipe (10), and the connecting pipe (10) is fixedly connected to the bottom of the inner wall of the box body (1); the clearance between the support plate (2) and the connecting pipe (10) is larger than the pipe wall thickness of the sleeve (9);

the water conservancy diversion adjustment mechanism includes honeycomb duct (12), mounting panel (13), handle (15), support column (16) and bearing (23), honeycomb duct (12) has two, one of them honeycomb duct (12) fixed connection is on the bottom face of box (1), another honeycomb duct (12) with fix box (1) bottom face honeycomb duct (12) detachable connection, two all fixedly connected with wedge (1201) on the inner wall of honeycomb duct (12), two all fixedly connected with mounting panel (13) on the surface of honeycomb duct (12) both sides, the through-hole has been seted up in mounting panel (13), nut (22) have been cup jointed to the through-hole internal fixation of mounting panel (13), nut (22) threaded connection has bolt (21), two honeycomb duct (12) are through nut (22) threaded connection, two the bottom of honeycomb duct (12) is fixedly connected with external screw thread pipe (14) respectively, external screw thread pipe (14) threaded connection has internal thread pipe (17), fixedly connected with handle (15) and support column (16) on the both sides surface of internal thread pipe (17), the top fixed connection of support column (16) is on handle (15), the bottom fixed connection of internal thread pipe (17) has elastic baffle (19), the bottom fixed connection of internal thread pipe (17) has discharging pipe (18), discharging pipe (18) have two, two discharging pipe (18) are through bolt (21) and nut (22) threaded connection, two discharging pipe (18) are connected with pivot (25) through bearing (23) horizontal rotation, the fixed cover seal (24) that has connect on pivot (25), cover seal (24) touch with the inner circle of bearing (23), fixedly connected with current-limiting plate (2501) on pivot (25), the horizontal activity of one end of pivot (25) runs through and installs on discharging pipe (18), the one end fixedly connected with sleeve (26) of pivot (25), sleeve (26) internal rotation is connected with loop bar (27), loop bar (27) buckle is connected with fixed fixture block (28), fixed fixture block (28) fixed connection is on the surface of discharging pipe (18).

2. A safety device for preventing concrete from splashing off of the end of a concrete delivery pipe as set forth in claim 1, wherein: the number of the wedge-shaped blocks (1201) is eight, and the eight wedge-shaped blocks (1201) are symmetrically distributed under the connecting pipe (10) in a staggered mode.

3. A safety device for preventing concrete from splashing off of the end of a concrete delivery pipe as set forth in claim 1, wherein: the bearings (23) are ball bearings, and two of the bearings (23) are horizontally and symmetrically distributed on two sides of the current limiting plate (2501).

4. A safety device for preventing concrete from splashing off of the end of a concrete delivery pipe as set forth in claim 1, wherein: and sealing cotton slivers (20) are bonded at the joints of the two guide pipes (12) and the two discharge pipes (18), the nut (22) and the bearing (23).

5. A safety device for preventing concrete from splashing off of the end of a concrete delivery pipe as set forth in claim 1, wherein: elasticity baffle (19) are aluminum alloy elastic plate, the quantity of elasticity baffle (19) is four, four the elasticity baffle interval sets up uniformly the inside of discharging pipe (18), just the cross sectional shape of elasticity baffle (19) is circular-arc, the bottom of elasticity baffle (19) all faces towards the center setting of discharging pipe (18).

6. A safety device for preventing concrete from splashing off of the end of a concrete delivery pipe as set forth in claim 1, wherein: install the sealing strip between external screw thread pipe (14) and internal thread pipe (17), external screw thread pipe (14) and internal thread pipe (17) are the aluminum alloy body.

7. A safety device for preventing concrete from splashing off of the end of a concrete delivery pipe as set forth in claim 1, wherein: the flow limiting plate (2501) is in a disc shape, and when the loop bar (27) is buckled on the fixed clamping block (28) for fixing, the flow limiting plate (2501) can block the discharge pipe (18); and the flow restriction plate (2501) is a heterogeneous plate, and the weight of the flow restriction plate on one side of the rotating shaft (25) is greater than that of the flow restriction plate on the other side of the rotating shaft (25), so that the flow restriction plate (25) is in a vertical state when the loop bar (27) is in a free state.

8. A safety device for preventing concrete from splashing off of the end of a concrete delivery pipe as set forth in claim 1, wherein: the fixed clamping block (28) is a locking type clamping block, and the loop bar (27) buckled on the fixed clamping block can be fixed by the fixed clamping block (28).

9. A safety device for preventing concrete from splashing off of the end of a concrete delivery pipe as set forth in claim 1, wherein: the connecting pipe (10) is an aluminum alloy pipe, and the connecting pipe (10) is located at the center of the bottom of the inner wall of the box body (1).

10. A safety device for preventing concrete from splashing off of the end of a concrete delivery pipe as set forth in claim 1, wherein: the guide pipe (12) and the discharge pipe (18) are both stainless steel pipes, and the caliber of the guide pipe (12) is the same as that of the discharge pipe (18).