A fabricated building grouting sleeve and a grouting system

Abstract

The application relates to the field of building, and discloses a fabricated building grouting sleeve and a grouting system. The grouting sleeve comprises a vertical sleeve, and further comprises: a fixed plate horizontally arranged at the middle part of the vertical sleeve, a plurality of vertical flow-through holes are arranged on the fixed plate, and a transmission assembly is inserted into the middle part of the fixed plate; a locking assembly arranged in the wall of the vertical sleeve, when a connecting steel bar is inserted into the vertical sleeve, the connecting steel bar drives the transmission assembly to move downward, and the locking assembly is used for locking the connecting steel bar; a grouting pipe located at the inner side wall of the lower end of the vertical sleeve; a grout overflow pipe located at the inner side wall of the upper end of the vertical sleeve; and a sealing plug threadedly connected in the grout overflow pipe. The connecting steel bar can be positioned, so that the connecting steel bar is always located at the vertical central axis position in the vertical sleeve, the deviation of the connecting steel bar is avoided, and the stability of the connecting steel bar is ensured. The friction between the connecting steel bar and the limiting rod can be improved, and the tensile strength between the vertical sleeve and the connecting steel bar is improved.

Description

Technical Field

[0001] This invention relates to the field of steel reinforcement grouting sleeves in the construction industry, specifically a prefabricated building grouting sleeve and grouting system. Background Technology

[0002] In prefabricated concrete buildings, the connection between precast vertical components (precast shear walls in shear wall structures, precast columns in frame structures, and precast beams) is typically achieved using grouting sleeve connections. Specifically, sleeves are pre-embedded into the connection ends of the precast components during fabrication. During on-site construction, the exposed reinforcing bars of the other connecting component are inserted into the sleeve, and after the components are installed and positioned, the reinforcing bars are connected by grouting. Compared to welding and straight-thread mechanical connections, grouting sleeve connections offer advantages such as reduced pre-processing of reinforcing bars, prevention of secondary stress and deformation in the reinforcing bars during on-site construction, and tolerance for relatively large force deviations.

[0003] In the prior art, there are many grouting sleeves for rebar connection. For example, Chinese patent application number 201920815655.2 discloses a self-locking rebar connection grouting sleeve, including a first grouting sleeve and a second grouting sleeve. The first grouting sleeve is provided with a grouting hole, and the second grouting sleeve is provided with a grout outlet hole. The first grouting sleeve is also provided with multiple limiting holes. Each limiting hole is equipped with a locking component. The first grouting sleeve is fixedly connected to the second grouting sleeve through the locking component. The locking block can be effectively installed in the limiting hole provided on the first grouting sleeve, and after being subjected to force, it can slide up and down well along the side wall of the limiting hole, thereby ensuring that the locking block can slide quickly and accurately after installation, realizing the self-locking of the first grouting sleeve and the second grouting sleeve.

[0004] However, in actual use, because the embedded reinforcing bars and connecting reinforcing bars are all located inside the sleeve, workers cannot know whether the position of the reinforcing bars has deviated from the vertical center of the grouting sleeve or shifted, resulting in uneven grouting or even incomplete grouting. When the above situation occurs, workers cannot quickly detect it using existing testing devices; the problem can only be measured after the sleeve is removed, at which point it is impossible to remedy the already grouted portion. Therefore, a grouting sleeve that can solve the above problems is needed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a prefabricated building grouting sleeve and grouting system. Traditional building grouting sleeves cannot limit the position of the reinforcing bars to avoid the problem of the reinforcing bars deviating from the center when in use. In addition, the workers cannot quickly detect the problem through the existing detection end. The problem can only be measured after the sleeve is removed, and at this time it is impossible to remedy the part that has already been grouted.

[0006] To achieve the above objectives, the technical solution adopted by the present invention to solve the above technical problems is as follows: A prefabricated building grouting sleeve grouting system, comprising a vertical sleeve, wherein the upper and lower end faces of the vertical sleeve are each provided with a coaxial mounting hole for inserting connecting steel bars and for fitting the vertical sleeve onto the pre-embedded steel bars, and further comprising:

[0007] A fixed plate is horizontally disposed in the middle of a vertical sleeve. Several vertical flow holes are provided on the fixed plate, and a transmission component is inserted into the middle of the fixed plate in a way that allows it to slide up and down.

[0008] A locking assembly is disposed inside the vertical sleeve wall and connected to the transmission assembly; when the connecting steel bar is inserted into the vertical sleeve, the connecting steel bar drives the transmission assembly to move downward and transmits the downward movement to the locking assembly, thereby locking the connecting steel bar with the locking assembly.

[0009] The grouting pipe penetrates the lower side wall of the vertical sleeve;

[0010] An overflow pipe penetrates the upper side wall of the vertical sleeve; a sealing plug is threaded into the overflow pipe.

[0011] Specifically, the transmission assembly includes:

[0012] A vertically and slidably inserted abutment into the middle of a fixed plate, the bottom of which extends radially outwards from several horizontal movable plates;

[0013] A movable groove is formed on the inner wall of a vertical sleeve at the height of the movable plate, corresponding to the number of movable plates. Inside the wall of the vertical sleeve, there is also a vertical groove above the movable groove. A slider that can slide vertically is provided in the vertical groove. The slider is connected to the bottom surface of the vertical groove by a first spring. The first spring has a guide rod that is fixedly connected to the bottom of the slider. The guide rod passes through the bottom surface of the vertical groove and is fixedly connected to the movable plate in the movable groove by a connecting crossbar. The locking assembly is set inside the slider and extends into the vertical sleeve to abut against the connecting steel bar when the slider moves downward.

[0014] Furthermore, the locking assembly includes:

[0015] A number of horizontal holes are arranged vertically inside the slider. On the side wall of the vertical groove near the central axis of the vertical sleeve, a number of horizontal grooves corresponding to the horizontal holes are also provided. A horizontal wedge block is provided in the horizontal groove, and the wedge block extends upward into the horizontal hole. At the end of the wedge block near the central axis of the vertical sleeve, a limiting rod extending into the vertical sleeve is also provided. The part of the limiting rod located in the horizontal groove is also fitted with a second spring. The two ends of the second spring abut against the end face of the wedge block and the inner wall of the horizontal groove, respectively.

[0016] The present invention also proposes a prefabricated building grouting system, including the aforementioned grouting sleeve, as well as a clamping mechanism and a detection mechanism. The clamping mechanism is detachably fitted onto the outside of the vertical sleeve, and the clamping mechanism is also provided with a fixed detection mechanism to detect the saturation of the grout inside the sleeve.

[0017] Furthermore, the card and mechanism include a rubber fixing cylinder sleeved outside the vertical sleeve. Outside the rubber fixing cylinder, there are also semi-circular rings and a second locking ring, which are longer than the rubber fixing cylinder. The ends of the first locking ring and the second locking ring extend outward with connecting wing plates and are locked to the outside of the rubber fixing cylinder by fastening bolts. A detection cylinder is provided on the first locking ring at a position that exceeds the height of the rubber fixing cylinder, and the detection mechanism is disposed inside the detection cylinder.

[0018] Furthermore, the testing institution includes:

[0019] A mounting plate is slidably disposed inside a detection cylinder. The front end of the mounting plate is provided with a detection end, and the rear end is provided with a lever extending out of the detection cylinder. A third spring is also sleeved on the outside of the detection end at the front end of the mounting plate. The two ends of the third spring respectively abut against the inner end face of the mounting plate and the detection cylinder. A detection hole is also provided on the inner end face of the detection cylinder for the detection end to pass through.

[0020] Furthermore, a circular dial is provided at the end of the lever.

[0021] By employing the above-described method and equipment, the present invention has the following advantages compared to the prior art:

[0022] 1. In this invention, by setting a locking mechanism and a transmission mechanism, when the connecting steel bar is inserted into the sleeve, the sleeve drives multiple limiting rods through the transmission mechanism to insert into the vertical and abut against the periphery of the connecting steel bar, thereby limiting the connecting steel bar so that the connecting steel bar is always in the vertical central axis position inside the vertical sleeve, which not only avoids the displacement of the connecting steel bar, but also ensures the stability of the connecting steel bar.

[0023] 2. In this invention, by setting multiple limiting rods, all of which abut against the periphery of the connecting steel bar, and in conjunction with the external thread at the outer periphery of the connecting steel bar, the friction between the connecting steel bar and the limiting rods can be increased, thereby improving the tensile strength between the vertical sleeve and the connecting steel bar.

[0024] 3. In this invention, by setting up a card and a detection mechanism, the sleeve can be detected at multiple positions and angles, and it is easy to disassemble and has good performance. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the internal structure of the vertical sleeve in this invention.

[0026] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the AA plane.

[0027] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the BB plane.

[0028] Figure 4 for Figure 1 Enlarged structural diagram at point C.

[0029] Figure 5 This is a schematic diagram of the combination of the card, mechanism, and detection mechanism with the vertical sleeve.

[0030] The components include: vertical sleeve—1; mounting hole—11; fixing plate—12; vertical flow hole—13; grouting pipe—14; overflow pipe—15; sealing plug—16; connecting steel bar—2; pre-embedded steel bar—3; abutment rod—41; movable groove—42; vertical groove—43; slider—44; first spring—45; guide rod—46; connecting crossbar—47; movable plate—48; horizontal hole—51; horizontal groove—52; wedge block—53; limit rod—54; second spring—55; rubber fixing cylinder—61; first locking ring—62; ​​second locking ring—63; connecting wing plate—64; detection cylinder—65; mounting plate—71; detection end—72; lever—73; third spring—74; detection hole—75; and dial—76. Detailed Implementation Plan

[0031] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] like Figures 1-5 As shown, a prefabricated building grouting sleeve includes a vertical sleeve 1, with coaxial mounting holes 11 on the upper and lower end faces of the vertical sleeve 1 for inserting connecting steel bars 2 and for fitting the vertical sleeve 1 onto pre-embedded steel bars 3. It also includes:

[0033] A fixing plate 12 is horizontally disposed in the middle of the vertical sleeve 1. Several vertical flow holes 13 are provided on the fixing plate 12. A transmission component is inserted into the middle of the fixing plate 12 in a way that allows it to slide up and down.

[0034] A locking assembly is installed inside the wall of the vertical sleeve 1 and connected to the transmission assembly. When the connecting steel bar 2 is inserted into the vertical sleeve 1, the connecting steel bar 2 drives the transmission assembly to move downward and transmits the downward movement to the locking assembly, thereby locking the connecting steel bar 2 using the locking assembly.

[0035] Grouting pipe 14 penetrates the lower side wall of vertical sleeve 1;

[0036] The overflow pipe 15 penetrates the upper side wall of the vertical sleeve 1; a sealing plug 16 is threaded into the overflow pipe 15.

[0037] In this invention, the main principle is as follows: After the vertical sleeve 1 is fitted onto the pre-embedded reinforcing bar 3, the connecting reinforcing bar 2 is inserted above it. As the connecting reinforcing bar 2 extends downwards, it presses against the transmission component, and the movement is transmitted to the locking component through the transmission component. When the connecting reinforcing bar 2 is inserted to its end, the locking component can just lock the connecting reinforcing bar 2, thereby fixing the position of the connecting reinforcing bar 2 and ensuring that the connecting reinforcing bar 2 and the pre-embedded reinforcing bar 3 are coaxial. Then, the sealing plug 16 in the overflow pipe 15 is opened, and the external grouting mechanism is connected to the grouting pipe 14. The external grouting mechanism continuously pumps concrete into the vertical sleeve 1, and after filling the entire internal space of the vertical sleeve from bottom to top through the vertical flow hole 13, it gradually overflows from the overflow pipe 15, thereby ensuring that the entire vertical sleeve will not shift or misalign during the grouting process, and ensuring that the internal grouting of the vertical sleeve 1 is saturated.

[0038] In a preferred embodiment, the transmission assembly includes:

[0039] A vertically inserted and slidably inserted abutment 41 into the middle of the fixed plate 12, wherein the bottom of the abutment 41 extends radially outward from several horizontal movable plates 48;

[0040] The movable groove 42 is formed on the inner wall of the vertical sleeve 1 at the height of the movable plate 48, and corresponds to the number of movable plates 48. Inside the wall of the vertical sleeve 1, there is also a vertical groove 43 located above the movable groove 42. A vertically sliding slider 44 is provided in the vertical groove 43. The slider 44 is connected to the bottom surface of the vertical groove 43 by a first spring 45. A guide rod 46 is provided in the first spring 45 and is fixedly connected to the bottom of the slider 44. The guide rod 46 passes through the bottom surface of the vertical groove 43 and is fixedly connected to the movable plate 48 in the movable groove 42 by a connecting crossbar 47. The locking assembly is provided in the slider 44 and extends into the vertical sleeve 1 to abut against the connecting steel bar 2 when the slider 44 moves downward.

[0041] This embodiment provides a specific structure for an implementable transmission rod assembly, wherein the abutment rod 41 serves as the main transmission component, used to transmit the downward displacement of the connecting steel bar 2 to the bottom movable plate 48, and then to the guide rod 46 via the movable plate 48 and the connecting crossbar 47, and further to the slider 44 in the upper vertical groove 43, so that the slider 44 drives the locking assembly to move, thereby causing the locking assembly to move into the vertical sleeve 1, so as to achieve the purpose of locking the position of the connecting steel bar 2 in the vertical direction.

[0042] As a further embodiment, the locking assembly includes:

[0043] A plurality of horizontal holes 51 are arranged vertically inside the slider 44. A plurality of horizontal grooves 52 corresponding to the horizontal holes 51 are also provided on the side wall of the vertical groove 43 near the central axis of the vertical sleeve 1. A horizontal wedge block 53 is provided in the horizontal groove 52, and the wedge block 53 extends obliquely upward into the horizontal hole 51. At the end of the wedge block 53 near the central axis of the vertical sleeve 1, a limiting rod 54 extending into the vertical sleeve 1 is also provided. The part of the limiting rod 54 located in the horizontal groove 52 is also fitted with a second spring 55. The two ends of the second spring 55 abut against the end face of the wedge block 53 and the inner wall of the horizontal groove 52, respectively.

[0044] In this embodiment, a specific structure of a locking assembly is provided, wherein the horizontal groove 52 cooperates with the horizontal hole 51. When the guide rod 46 drives the slider 44 to move downward, the upper inner wall of the horizontal hole 51 contacts the inclined surface of the wedge block 53, thereby applying a thrust to the wedge block 53 to move into the vertical sleeve 1, forcing the wedge block 53 to move towards the vertical sleeve 1. At this time, the limiting rod 54 at the end of the wedge block 53 extends out of the horizontal groove 52 and into the vertical sleeve 1, pressing against the outer surface of the connecting steel bar 2, thereby achieving the purpose of pressing against the connecting steel bar 2 and playing a limiting role. Furthermore, since several sets of horizontal holes 51 and horizontal grooves 52 are evenly distributed circumferentially on the end face of the vertical sleeve 1, a pushing force can be applied to the connecting reinforcing bar 2 from multiple directions, further ensuring that the connecting reinforcing bar 2 will not shift or misalign. Simultaneously, the multiple limiting rods 54, in conjunction with the external threads on the outer circumferential wall of the connecting reinforcing bar 2, can also increase the friction between the connecting reinforcing bar 2 and the limiting rods 54, thereby increasing the tensile strength between the vertical sleeve 1 and the connecting reinforcing bar 2. It should be noted that, to prevent grout leakage, a rubber sealing gasket needs to be installed inside the groove of the limiting rod 54 extending from the horizontal groove 52. When the limiting rod 54 extends, it seals the opening of the rubber sealing gasket to prevent grout leakage.

[0045] The present invention provides a prefabricated building grouting system, including the aforementioned grouting sleeve, as well as a clamping mechanism and a detection mechanism. The clamping mechanism is detachably fitted onto the outside of the vertical sleeve 1, and the clamping mechanism is also provided with a fixed detection mechanism to detect the saturation of grout inside the sleeve.

[0046] This embodiment provides an additional optimization method for the aforementioned grouting sleeve. By installing a detachable clip and mechanism on the outside of the grouting sleeve, a detection mechanism can be installed outside the vertical sleeve 1 to facilitate rapid detection of the grouting condition inside the vertical sleeve 1, allowing for timely remedial action when problems occur. The device responsible for detecting the saturation of the grout inside the sleeve is a detection end, which can generally be a concrete strength tester, a concrete ultrasonic compaction tester, etc., all of which can achieve the above function. Therefore, its specific structure will not be described in detail here.

[0047] As a further embodiment, the card and mechanism include a rubber fixing cylinder 61 sleeved outside the vertical sleeve 1. A semi-circular first locking ring 62 and a second locking ring 63, which are longer than the rubber fixing cylinder 61, are also provided outside the rubber fixing cylinder 61. Connecting wing plates 64 extend outward from the ends of the first locking ring 62 and the second locking ring 63 and are locked to the outside of the rubber fixing cylinder 61 by fastening bolts. A detection cylinder 65 is provided on the first locking ring 62 at a position that exceeds the height of the rubber fixing cylinder 61, and the detection mechanism is disposed inside the detection cylinder 65.

[0048] Specifically, the mechanism mainly includes a rubber fixing cylinder 61 sleeved on the outside of the vertical sleeve 1. The detection mechanism is secured to the outside of the vertical sleeve 1 by connecting wing plates 64 at the ends of the first locking ring 62 and the second locking ring 63 and fastening bolts, and then fixed by a detection cylinder 65 set on the first locking ring 62. Since the length of the first locking ring 62 and the second locking ring 63 is longer than that of the rubber fixing cylinder 61, there will be a section of space between the first locking ring 62 and the second locking ring 63 where the rubber fixing cylinder 61 is not present. The detection cylinder is installed in this hollow section, and the detection mechanism is fixed by the detection cylinder 65 to detect the grouting condition inside the vertical sleeve 1.

[0049] As a further embodiment, the testing mechanism includes:

[0050] A mounting plate 71 is slidably disposed inside the detection cylinder 65. The front end of the mounting plate 71 is provided with a detection end 72, and the rear end is provided with a lever 73 extending out of the detection cylinder 65. A third spring 74 is also sleeved on the outside of the detection end 72. The two ends of the third spring 74 respectively abut against the inner end face of the mounting plate 71 and the detection cylinder 65. A detection hole 75 is also provided on the inner end face of the detection cylinder 65 for the detection end 72 to pass through.

[0051] Specifically, the testing mechanism mainly includes a testing end 72. The testing end 72 is a mature existing technology, so its internal structure will not be described in detail here. One end of the testing end is fixed to the mounting plate 71, and the other end extends out of the testing cylinder 65 through the testing hole 75 at the end of the testing cylinder 65 to press against the outer wall of the vertical sleeve 1. Since a third spring 74 is also provided between the mounting plate 71 and the inner wall of the testing cylinder 65, when the lever 73 is pushed, the testing end 72 extends out of the testing cylinder 65 and presses against the outer wall of the vertical sleeve 1 for testing. After releasing the lever 73, the mounting plate 71 causes the testing end 72 to spring back under the action of the third spring 74, thus disengaging from the vertical sleeve 1 and completing the testing process. In particular, rapid testing of different parts of the vertical sleeve 1 can also be achieved by rotating the first locking ring 62 and the second locking ring 63 outside the vertical sleeve 1, effectively improving testing efficiency. The locking state of the first locking ring 62 and the second locking ring 63 outside the rubber fixing cylinder 61 can also be loosened to adjust the detection position, thereby obtaining multiple sets of detection data and making the detection results more accurate.

[0052] As a further embodiment, a circular dial 76 is also provided at the end of the lever 73.

[0053] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation" and "connection" are interpreted broadly. The use of terms such as "front," "rear," "inner," and "outer" in descriptions of models is for better representation of their positions and relationships. The dimensions of the devices are shown in the figures, and the loading order may vary; these should not be construed as limitations on the invention. Those skilled in the art can understand the above content according to the specific circumstances.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. The present invention can be modified and varied appropriately. Any modifications, equivalent substitutions, improvements, etc., made within the scope of the specifications and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A prefabricated building grouting sleeve, comprising a vertical sleeve (1), wherein the upper and lower end faces of the vertical sleeve (1) are each provided with a coaxial mounting hole (11) for inserting connecting steel bars (2) and for fitting the vertical sleeve (1) onto pre-embedded steel bars (3), characterized in that, Also includes: A fixing plate (12) is horizontally disposed in the middle of the vertical sleeve (1). Several vertical flow holes (13) are provided on the fixing plate (12). A transmission component is inserted into the middle of the fixing plate (12) in a way that allows it to slide up and down. The locking assembly is installed inside the wall of the vertical sleeve (1) and connected to the transmission assembly. When the connecting steel bar (2) is inserted into the vertical sleeve (1), the connecting steel bar (2) drives the transmission assembly to move down and transmits the downward movement to the locking assembly, thereby locking the connecting steel bar (2) using the locking assembly. Grouting pipe (14) penetrates the lower side wall of vertical sleeve (1); An overflow pipe (15) penetrates the upper side wall of the vertical sleeve (1); a sealing plug (16) is threaded into the overflow pipe (15). The transmission assembly includes: A vertically and slidably inserted abutment (41) into the middle of a fixed plate (12), the bottom of which extends radially outwards several horizontal movable plates (48). The movable groove (42) is opened on the inner wall of the vertical sleeve (1) at the height of the movable plate (48) and corresponds to the number of movable plates (48); inside the wall of the vertical sleeve (1), there is also a vertical groove (43) located above the movable groove (42), and a slider (44) that can slide vertically is provided in the vertical groove (43). The slider (44) is connected to the bottom surface of the vertical groove (43) by a first spring (45); the first spring (45) is provided with a guide rod (46) that is fixedly connected to the bottom of the slider (44). The guide rod (46) passes through the bottom surface of the vertical groove (43) and is fixedly connected to the movable plate (48) in the movable groove (42) by a connecting crossbar (47); the locking assembly is set in the slider (44) and extends into the vertical sleeve (1) to abut against the connecting steel bar (2) when the slider (44) moves downward. The locking assembly includes: A number of horizontal holes (51) are arranged vertically inside the slider (44). On the side wall of the vertical groove (43) near the central axis of the vertical sleeve (1), a number of horizontal grooves (52) corresponding to the horizontal holes (51) are also provided. A horizontal wedge block (53) is provided in the horizontal groove (52). The wedge block (53) extends obliquely upward into the horizontal hole (51). At the end of the wedge block (53) near the central axis of the vertical sleeve (1), a limiting rod (54) extending into the vertical sleeve (1) is also provided. The part of the limiting rod (54) located in the horizontal groove (52) is also fitted with a second spring (55). The two ends of the second spring (55) abut against the end face of the wedge block (53) and the inner wall of the horizontal groove (52) respectively.

2. A prefabricated building grouting system, characterized in that, The grouting sleeve as described in claim 1 is further comprising a clamping mechanism and a detection mechanism. The clamping mechanism is detachably fitted onto the outside of the vertical sleeve (1). The clamping mechanism is also provided with a fixed detection mechanism, which detects the saturation of the grout inside the sleeve.

3. The prefabricated building grouting system as described in claim 2, characterized in that, The card and mechanism include a rubber fixing cylinder (61) sleeved outside the vertical sleeve (1). A first locking ring (62) and a second locking ring (63) in a semi-circular shape and longer than the rubber fixing cylinder (61) are also provided outside the rubber fixing cylinder (61). A connecting wing plate (64) extends outward from the end of the first locking ring (62) and the second locking ring (63) and is locked to the outside of the rubber fixing cylinder (61) by fastening bolts. A detection cylinder (65) is provided on the first locking ring (62) at a position exceeding the height of the rubber fixing cylinder (61). The detection mechanism is set inside the detection cylinder (65).

4. The prefabricated building grouting system as described in claim 3, characterized in that, The testing institutions include: A mounting plate (71) is slidably disposed inside the detection cylinder (65). The front end of the mounting plate (71) is provided with a detection end (72), and the rear end is provided with a lever (73) extending out of the detection cylinder (65). A third spring (74) is also sleeved on the outside of the detection end (72). The two ends of the third spring (74) respectively abut against the inner end face of the mounting plate (71) and the detection cylinder (65). A detection hole (75) for the detection end (72) to pass through is also provided on the inner end face of the detection cylinder (65).

5. A prefabricated building grouting system as described in claim 4, characterized in that, A circular dial (76) is also provided at the end of the lever (73).

Images