Prefabricated stair prestress connecting structure mud jacking nozzle

Abstract

The utility model discloses an assembly type stair prestress connecting structure mud jacking nozzle which comprises a mud jacking nozzle body connected to the side wall of a grouting hole in a threaded mode, the length of the mud jacking nozzle body can be adjusted, and the mud jacking nozzle body is used for spraying cement paste to the middle position of a grouting space of a prestress assembly type stair. The construction method has the effect of improving the compactness of the cement paste injected into the prestress assembly type stair.

Description

Technical Field

[0001] The utility model relates to the field of assembled buildings, in particular to a grouting nozzle for an assembled staircase prestressed connection structure. Background Art

[0002] Grouting nozzle is a special nozzle used in construction, mainly used for connecting components of prefabricated buildings. Prefabricated buildings usually reserve grouting space on the abutment surface of each prefabricated building module, and set grouting holes connected to the grouting space. The grouting nozzle sprays cement slurry into the grouting space of the prefabricated building through compressed air or hydraulic pressure. After the cement slurry solidifies, the components of the prefabricated building can be connected and fixed.

[0003] The existing grouting nozzle is usually screwed into the grouting hole, and then the cement slurry is sprayed into the grouting space of the prefabricated building through the grouting machine. When the prefabricated structure is a prestressed prefabricated staircase, its grouting space is horizontally through-set, and its grouting space is long and narrow; its prestressed structure is set in the grouting space, and the grouting holes are set on the closed plates at both ends of its grouting space; and using the existing grouting nozzle, it is difficult to spray cement slurry into the prestressed prefabricated staircase, which makes it difficult to fill the grouting space of the prestressed prefabricated staircase with cement slurry, reducing the stability of the prestressed prefabricated staircase. Therefore, there is still room for improvement. Utility Model Content

[0004] In order to improve the density of cement slurry injected into prestressed assembled stairs, the present application provides a grouting nozzle for a prestressed connection structure of an assembled staircase.

[0005] The present application provides a prestressed staircase grouting nozzle for connecting the structure using the following technical solutions:

[0006] A grouting nozzle for a prestressed connection structure of an assembled staircase comprises a grouting nozzle body threadedly connected to the side wall of a grouting hole. The length of the grouting nozzle body is adjustable and is used to spray cement slurry to the middle position of the grouting space of the prestressed assembled staircase.

[0007] By adopting the above technical scheme, the grouting nozzle is extended into the middle position of the grouting space of the prestressed assembled staircase, and then cement slurry is injected into the grouting space of the prestressed assembled staircase, so that the cement slurry is directly transmitted to the middle position of the grouting space of the prestressed assembled staircase, thereby making the cement slurry flow from the middle position of the grouting space of the prestressed assembled staircase to both ends of the prestressed assembled staircase, reducing the injection of cement slurry from both ends of the prestressed assembled staircase, and the cement slurry is difficult to reach the middle position of the grouting space of the prestressed assembled staircase, resulting in the middle position of the grouting space of the prestressed assembled staircase after the cement slurry solidifies. The cavities are easily formed, thereby improving the density of the cement slurry injected into the prestressed assembled staircase, and improving the stability and service life of the prestressed assembled staircase.

[0008] Preferably, the grouting nozzle body includes a threaded joint threadedly connected to the side wall of the grouting hole and an adjusting tube slidably disposed on the threaded joint, and the threaded joint is sleeved on the adjusting tube.

[0009] By adopting the above technical scheme, the grouting nozzle body is divided into an adjusting tube and a threaded joint which is sleeved on the adjusting tube and threadedly connected to the side wall of the grouting hole, so that the threaded joint fixes the length direction of the adjusting tube and facilitates extending the adjusting tube into the grouting space of the extended stress assembled staircase. The operation is simple, the length of the grouting nozzle body can be adjusted easily, and the structure is simple, which is conducive to cost saving.

[0010] Preferably, the threaded joint is further provided with an adjustment ring, and the adjustment ring is further provided with a switching structure for switching the sliding state and the fixed state between the adjustment tube and the threaded joint.

[0011] By adopting the above technical solution, cement slurry is injected into the grouting space of the stress assembled staircase for a period of time, and then the length of the adjusting tube extending out of the grouting space of the stress assembled staircase is adjusted, and there is no need to continuously grasp and adjust the adjusting tube. By setting a switching structure, when it is necessary to adjust the length of the adjusting tube extending out of the grouting space of the stress assembled staircase or to fix the adjusting tube, the switching can be achieved through the switching structure, which is conducive to maintaining the stability of the adjusting tube during the process of injecting cement slurry into the grouting space of the stress assembled staircase, and reducing the situation where the adjusting tube automatically extends out of the grouting space of the stress assembled staircase under the pressure of the grouting machine due to no one holding it.

[0012] Preferably, the outer wall of the adjusting tube is corrugated, the adjusting ring is sleeved on the adjusting tube, the adjusting ring is fixedly arranged on the threaded joint, and the inner ring side wall of the adjusting ring is provided with a movable groove; the switching structure includes a fixing rod fixedly arranged on the side wall of the movable groove and a switching rod sleeved and rotatably arranged on the fixing rod, a driving rod is rotatably arranged on one end of the switching rod, and a clamping rod is fixedly arranged on the other end, the driving rod passes through the bottom wall of the movable groove, and the clamping rod is used to clamp into the external thread of the adjusting tube.

[0013] By adopting the above technical solution, the driving rod is controlled to control the clamping rod to clamp into or disengage from the outer wall of the adjusting tube, thereby switching the fixed state or sliding state between the adjusting tube and the threaded joint. The operation is simple, the operation is easy to reduce, and the structure is simple.

[0014] Preferably, the driving rod is fixedly provided with a protrusion, and the adjusting ring is also provided with an automatic groove and a spring, one end of the spring is provided on the side wall of the automatic groove close to the adjusting tube, and the other end is provided on the side wall of the protrusion close to the adjusting tube, and the spring is always in a compressed state to drive the driving rod to extend out of the movable groove.

[0015] By adopting the above technical solution, the driving rod is pressed, and the clamping rod is separated from the outer wall of the adjusting tube, so that the adjusting tube can be extended out of the grouting space of the stress assembled staircase. The driving rod is loosened, and the spring automatically drives the clamping rod to clamp into the outer wall of the adjusting tube through the protrusion and the driving rod, thereby fixing the adjusting tube and the threaded joint. The operation is simple, and the steps of adjusting the adjusting tube to extend out of the grouting space of the stress assembled staircase are further reduced, which is conducive to improving the efficiency of injecting cement slurry into the grouting space of the stress assembled staircase.

[0016] Preferably, a side of the clamping rod close to the adjusting tube is concave in an arc shape so as to abut against the trough of the corrugations of the outer wall of the adjusting tube.

[0017] By adopting the above technical solution, when the clamping rod is clamped into the outer wall of the adjusting tube, the arc-shaped concave side of the clamping rod abuts against the trough of the corrugation of the outer wall of the adjusting tube, thereby improving the stability of the adjusting tube and the threaded joint in a fixed state.

[0018] Preferably, the adjusting ring is also provided with a thread groove.

[0019] By adopting the above technical solution, the threaded bolt of the vibrator is connected to the threaded groove. The vibrator transmits vibration to the adjusting tube through the adjusting ring to compact the cement slurry in the grouting space of the prestressed assembled staircase, thereby further improving the density of the cement slurry injected into the prestressed assembled staircase.

[0020] Preferably, a limiting ring is provided at the end of the adjusting tube close to the threaded joint, the limiting ring is sleeved and fixed on the adjusting tube, and the outer diameter of the limiting ring is less than or equal to the outer diameter of the threaded joint.

[0021] By adopting the above technical solution, a limiting ring is set to limit the threaded joint from detaching from the adjusting tube, thereby reducing the possibility of the threaded joint being lost; at the same time, the diameter of the outer circle of the limiting ring is less than or equal to the diameter of the inner circle of the outer circle of the threaded joint, thereby reducing the possibility of the limiting ring being difficult to extend into the grouting hole.

[0022] Preferably, a connecting nut is provided at one end of the adjusting tube away from the threaded joint for threadably connecting the adjusting tube to a grouting machine.

[0023] By adopting the above technical solution, the adjusting pipe is threadedly connected to the grouting machine by using the connecting nut, so that the adjusting pipe can be disassembled and cleaned and installed on the grouting machine, which is convenient for disassembling and cleaning the adjusting pipe from the grouting machine, improving the cleaning efficiency of the adjusting pipe. It is also convenient to replace adjusting pipes of different specifications to the grouting machine.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. By setting the grouting nozzle body to be adjustable in length, the cement slurry can be directly transmitted to the middle position of the grouting space of the prestressed assembled staircase, so that the cement slurry flows from the middle position of the grouting space of the prestressed assembled staircase to both ends of the prestressed assembled staircase, reducing the injection of cement slurry from both ends of the prestressed assembled staircase. It is difficult for the cement slurry to reach the middle position of the grouting space of the prestressed assembled staircase, resulting in a cavity in the middle position of the grouting space of the prestressed assembled staircase after the cement slurry solidifies, thereby improving the density of the cement slurry injected into the prestressed assembled staircase, and improving the stability and service life of the prestressed assembled staircase.

[0026] 2. By setting a driving rod, a clamping rod, a spring, a fixing rod and a switching rod, when it is necessary to adjust the length of the adjusting tube extending out of the grouting space of the stress-assembled staircase or to fix the adjusting tube, the switching can be achieved by pressing the driving rod or releasing the driving rod. The operation is simple, which is convenient for reducing the operation and is beneficial for maintaining the stability of the adjusting tube during the process of injecting cement slurry into the grouting space of the stress-assembled staircase, and reducing the situation in which the adjusting tube automatically extends out of the grouting space of the stress-assembled staircase under the pressure of the grouting machine due to no one holding it. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a grouting nozzle of a prestressed connection structure of an assembled staircase installed on a grouting machine in an embodiment of the present application.

[0028] Figure 2 It is a schematic diagram of the overall structure of a grouting nozzle of a prestressed connection structure of an assembled staircase in an embodiment of the present application.

[0029] Figure 3 It is a schematic diagram of the internal structure of a grouting nozzle of a prestressed connection structure of an assembled staircase in an embodiment of the present application.

[0030] Figure 4 yes Figure 3 Enlarged view of part A in the middle.

[0031] Description of reference numerals:

[0032] 1. Grouting nozzle body; 11. Adjusting tube; 111. Limiting ring; 112. Connecting nut; 113. Limiting ring; 12. Threaded joint; 121. Adjusting ring; 1211. Threaded groove; 122. Movable groove; 123. Automatic groove; 124. Spring; 2. Switching structure; 21. Fixed rod; 22. Switching rod; 23. Driving rod; 231. Bump; 24. Clamping rod; 25. Rotating rod; 251. Sleeve ring; 3. Grouting machine. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-4 This application is described in further detail.

[0034] The present application embodiment discloses a grouting nozzle for a prestressed connection structure of an assembled staircase. Figure 1-Figure 3 The grouting nozzle of the prestressed connection structure of the assembled staircase includes a grouting nozzle body 1 which is threadedly connected to the grouting hole. In this embodiment, the grouting nozzle body 1 includes a threaded joint 12 which is threadedly connected to the side wall of the grouting hole and an adjusting tube 11 which is slidably connected to the threaded joint 12. The threaded joint 12 and the adjusting tube 11 are both cylindrical. The threaded joint 12 is sleeved on the adjusting tube 11, and the outer wall of the adjusting tube 11 abuts against the inner wall of the threaded joint 12. The outer wall of the adjusting tube 11 is corrugated. A connecting nut 112 is movably connected to one end of the adjusting tube 11, and a limiting ring 111 is sleeved and fixed. The connecting nut 112 is used to be threadedly connected to the grouting machine 3, so that the adjusting tube 11 can be detachably installed on the grouting machine 3, and the cement slurry in the grouting machine 3 is transmitted to the grouting space of the prestressed assembled staircase; the limiting ring 111 is used to limit the connecting nut 112 from being separated from the adjusting tube 11. A limiting ring 113 is also sleeved and fixed on the end of the adjusting tube 11 close to the threaded joint 12. The outer diameter of the limiting ring 113 is smaller than the outer diameter of the threaded joint 12, so as to limit the threaded joint 12 from being separated from the adjusting tube 11. An adjusting ring 121 is fixed on the end of the threaded joint 12 away from the limiting ring 113. The adjusting ring 121 is sleeved on the adjusting tube 11. The adjusting ring 121 is also provided with a switching structure 2 for switching the sliding state and the fixed state between the adjusting tube 11 and the threaded joint 12.

[0035] Reference Figure 3 as well as Figure 4 The inner ring side wall of the adjusting ring 121 abuts against the outer wall of the adjusting tube 11, and the outer diameter of the adjusting ring 121 is larger than the outer diameter of the threaded joint 12. A movable groove 122 is recessed on the inner ring side wall of the adjusting ring 121. The movable groove 122 is in the shape of a rectangular groove, and the length direction of the movable groove 122 is consistent with the axial direction of the adjusting ring 121. A through hole (not shown in the figure) is also opened on the bottom wall of the movable groove 122. The through hole is in the shape of a rectangular hole, passes through the bottom wall of the movable groove 122 and is connected to the outside of the movable groove 122. The through hole is located at one end of the movable groove 122 along the length direction.

[0036] Reference Figure 3 as well as Figure 4In this embodiment, the switching structure 2 includes a fixed rod 21 fixed on the side wall of the movable groove 122 and a switching rod 22 sleeved on the fixed rod 21. The fixed rod 21 is in the shape of a cylindrical rod. The two ends of the fixed rod 21 along the axial direction are respectively fixed to the side walls of the movable groove 122 along the width direction, and the fixed rod 21 is located in the middle position of the movable groove 122 along the length direction. The switching rod 22 is in the shape of a rectangular rod. The two sides of the switching rod 22 along the width direction respectively abut against the side walls of the movable groove 122 along the width direction. The fixed rod 21 is located in the middle position of the switching rod 22 along the length direction, so that the switching rod 22 rotates around the fixed rod 21.

[0037] Reference Figure 3 as well as Figure 4 One end of the switch rod 22 along the length direction is rotatably connected to the driving rod 23, and the other end is fixedly connected to the clamping rod 24 for clamping into the outer wall of the adjustment tube 11. The driving rod 23 is in the shape of a rectangular rod, and the driving rod 23 extends out of the movable groove 122 through the through hole, and the two sides of the driving rod 23 along the width direction respectively abut against the side walls of the through hole at both ends along the length direction, and the two sides of the driving rod 23 along the thickness direction respectively abut against the side walls of the through hole at both ends along the width direction, so that by pressing the driving rod 23, the clamping rod 24 can be driven to detach from the adjustment tube 11.

[0038] Reference Figure 3 as well as Figure 4 The driving rod 23 is rotatably connected to the rotating rod 25, and the ends of the driving rod 23 and the switching rod 22 that are connected to each other are both protruding with a ring 251, and the ring 251 fixed on the driving rod 23 and the ring 251 fixed on the switching rod 22 are sleeved on the rotating rod 25 at intervals, so that the driving rod 23 and the switching rod 22 are rotatably connected.

[0039] Reference Figure 3 as well as Figure 4 A protrusion 231 is protruded from the side of the driving rod 23 close to the fixed rod 21, and the protrusion 231 is in the shape of a rectangular block. An automatic groove 123 for the protrusion 231 to move is provided on the side wall of the through hole, and the automatic groove 123 is in the shape of a rectangular groove, and the length direction of the automatic groove 123 is consistent with the radial direction of the adjustment ring 121, and the side of the protrusion 231 away from the driving rod 23 abuts against the bottom wall of the automatic groove 123. A spring 124 is fixed to the side wall of the automatic groove 123 close to the adjustment tube 11, and one end of the spring 124 is fixedly connected to the side wall of the automatic groove 123 close to the adjustment tube 11, and the other end is fixedly connected to the side wall of the protrusion 231 close to the automatic groove 123 close to the adjustment tube 11. When the side of the protrusion 231 away from the adjusting tube 11 abuts against the side wall of the automatic groove 123 away from the adjusting tube 11, the spring 124 is in a compressed state, so that the spring 124 is always in a compressed state and always drives the driving rod 23 to extend out of the movable groove 122, thereby driving the clamping rod 24 to clamp into the outer wall of the adjusting tube 11 to fix the adjusting tube 11 and the threaded joint 12.

[0040] Reference Figure 3 as well as Figure 4 The clamping rod 24 is in the shape of a rectangular rod, and the two ends of the clamping rod 24 along the length direction respectively abut against the side walls of the movable groove 122 on both sides along the width direction. The side of the clamping rod 24 close to the adjusting tube 11 is concave in an arc shape, so that the clamping rod 24 is clamped into the trough of the corrugation of the outer wall of the adjusting tube 11, thereby increasing the stability of the threaded joint 12 and the adjusting tube 11 in the fixed state.

[0041] Reference Figure 2 A threaded groove 1211 is also provided on the side of the adjusting ring 121 away from the threaded structure, which is used to connect the vibration bolt of the vibrator to transmit the vibration to the adjusting tube 11, thereby vibrating the cement slurry in the grouting space of the prestressed assembled staircase, thereby improving the density of the cement slurry in the grouting space of the prestressed assembled staircase.

[0042] The implementation principle of the grouting nozzle of a prestressed connection structure of an assembled staircase in the embodiment of the present application is:

[0043] When it is necessary to inject cement slurry into the grouting space of the prestressed assembled staircase, the adjusting tube 11 is first installed on the grouting machine 3 using the connecting nut 112, and then the threaded joint 12 is threadedly connected to the side wall of the grouting hole to connect the grouting nozzle body 1 to the grouting hole. Then the driving rod 23 is pressed, the elastic force of the spring 124 is overcome by the protrusion 231, and the switching rod 22 is rotated around the fixed rod 21, thereby driving the clamping rod 24 to disengage from the adjusting tube 11, and then the adjusting tube 11 is extended into the grouting space of the prestressed assembled staircase until the end of the adjusting tube 11 with the limiting ring 113 is located in the middle position of the grouting space of the prestressed assembled staircase, and then the driving rod 23 is loosened, and the spring 124 drives the driving rod 23 to extend out of the movable groove 122 through the protrusion 231, and the clamping rod 24 is clamped into the outer wall of the adjusting tube 11, and the adjusting tube 11 and the threaded joint 12 are fixed, and then the vibration bolt of the vibrator is screwed into the thread groove 1211. Then, the grouting machine 3 is started to inject cement slurry into the grouting space of the prestressed assembled staircase, and then the vibrator is started. The vibrator transmits vibration to the adjustment tube 11 through the vibration bolt, and then vibrates the cement slurry in the grouting space of the prestressed assembled staircase, so that the cement slurry fully fills the grouting space of the prestressed assembled staircase. Then, the adjustment tube 11 is gradually extended out of the grouting space of the prestressed assembled staircase until the cement slurry fills the grouting space of the prestressed assembled staircase. Then, the grouting machine 3 is shut down and the grouting nozzle body 1 is removed.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A grouting nozzle for a prestressed connection structure of an assembled staircase, characterized in that: It comprises a grouting nozzle body (1) threadedly connected to the side wall of a grouting hole. The length of the grouting nozzle body (1) is adjustable and is used to spray cement slurry to the middle position of the grouting space of a prestressed assembled staircase.

2. The grouting nozzle for the prestressed connection structure of an assembled staircase according to claim 1 is characterized in that: The grouting nozzle body (1) comprises a threaded joint (12) threadedly connected to the side wall of the grouting hole and an adjusting tube (11) slidably arranged on the threaded joint (12), and the threaded joint (12) is sleeved on the adjusting tube (11).

3. The grouting nozzle for the prestressed connection structure of an assembled staircase according to claim 2 is characterized in that: The threaded joint (12) is also provided with an adjustment ring (121), and the adjustment ring (121) is also provided with a switching structure (2) for switching the sliding state and the fixed state between the adjustment tube (11) and the threaded joint (12).

4. The grouting nozzle for the prestressed connection structure of an assembled staircase according to claim 3 is characterized in that: The adjusting tube (11) is provided with an external thread; the adjusting ring (121) is sleeved on the adjusting tube (11); the adjusting ring (121) is fixedly arranged on the threaded joint (12); and a movable groove (122) is arranged on the inner ring side wall of the adjusting ring (121); the switching structure (2) comprises a fixing rod (21) fixedly arranged on the side wall of the movable groove (122) and a switching rod (22) sleeved and rotatably arranged on the fixing rod (21); a driving rod (23) is rotatably arranged on one end of the switching rod (22); and a clamping rod (24) is fixedly arranged on the other end; the driving rod (23) passes through the bottom wall of the movable groove (122); and the clamping rod (24) is used to be clamped into the external thread of the adjusting tube (11).

5. The grouting nozzle for the prestressed connection structure of an assembled staircase according to claim 4 is characterized in that: The driving rod (23) is fixedly provided with a protrusion (231), and the adjusting ring (121) is also provided with an automatic groove (123) and a spring (124), one end of the spring (124) is provided on a side wall of the automatic groove (123) close to the adjusting tube (11), and the other end is provided on a side wall of the protrusion (231) close to the adjusting tube (11), and the spring (124) is always in a compressed state to drive the driving rod (23) to extend out of the movable groove (122).

6. A grouting nozzle for a prestressed connection structure of an assembled staircase according to any one of claims 4-5, characterized in that: A side of the clamping rod (24) close to the regulating tube (11) is concave in an arc shape, so as to abut against the trough of the corrugation of the outer wall of the regulating tube (11).

7. The grouting nozzle for the prestressed connection structure of an assembled staircase according to claim 6 is characterized in that: The adjusting ring (121) is also provided with a thread groove (1211).

8. The grouting nozzle for the prestressed connection structure of an assembled staircase according to claim 2 is characterized in that: A limiting ring (113) is provided at the end of the adjusting tube (11) close to the threaded joint (12); the limiting ring (113) is sleeved and fixedly arranged on the adjusting tube (11), and the outer diameter of the limiting ring (113) is less than or equal to the outer diameter of the threaded joint (12).

9. The grouting nozzle for the prestressed connection structure of an assembled staircase according to claim 2, characterized in that: A connecting nut (112) is provided at one end of the adjusting tube (11) away from the threaded joint (12) for threading the adjusting tube (11) onto the grouting machine (3).

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