Prefabricated part preformed hole positioning device
The pre-drilled hole positioning device with double-layer positioning frame and eccentric wheel design solves the problem of inaccurate positioning of pre-drilled holes in precast components, realizes efficient and stable sleeve installation, and improves the production quality and construction efficiency of precast components.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-04-07
AI Technical Summary
The existing positioning devices for precast component holes have insufficient anti-interference ability during concrete vibration, which can easily lead to sleeve axis deviation and failure to meet verticality requirements. The operation is cumbersome and the stability is affected by human factors, making it difficult to guarantee installation accuracy and construction efficiency.
The double-layer positioning frame structure includes a first positioning plate and a second positioning plate that are parallel to each other. The pre-embedded sleeve is accurately positioned and self-locked by fastening components such as eccentric wheels and sliding clamps. Combined with the calibration seam, the verticality and in-plane position accuracy of the sleeve are ensured.
It improves the positioning accuracy and construction efficiency of the reserved holes, ensures the verticality and installation accuracy of the embedded sleeves, is easy to operate and highly stable, and is suitable for the production of high-strength concrete precast components.
Smart Images
Figure CN224089274U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prefabricated component production technology, and in particular to a prefabricated component reserved hole positioning device. Background Technology
[0002] In the field of prefabricated buildings, precast components often require pre-drilled holes during production to facilitate the subsequent installation of electromechanical pipelines. Therefore, the precise positioning of the embedded sleeves directly affects the installation quality and construction efficiency of the building's electromechanical systems. Especially for high-strength precast concrete components, inaccurate positioning or failure to meet verticality requirements of functional pre-drilled holes will make repairs difficult.
[0003] Current commonly used positioning techniques have several drawbacks: insufficient resistance to interference during concrete vibration, easily leading to sleeve axis misalignment and difficulty in maintaining verticality accuracy; reliance on step-by-step bolt tightening, which is cumbersome, time-consuming, and susceptible to human error, posing a risk of clamping failure; the need for various auxiliary tools for positioning, which can easily generate significant cumulative errors; and so on. These technical defects directly affect the installation accuracy of embedded sleeves and reduce the production quality of perforated precast components. Therefore, there is an urgent need to provide an improved embedded hole positioning device to effectively solve the above-mentioned technical problems. Utility Model Content
[0004] The main technical problem to be solved by this utility model is to provide a positioning device for reserved holes in prefabricated components, so as to improve the positioning accuracy of reserved holes and the production efficiency of prefabricated components with holes.
[0005] To address the aforementioned technical problems, this utility model provides a pre-drilled hole positioning device for prefabricated components, which is installed on the mold of the prefabricated component. The device includes a positioning frame, a fixing component, and several embedded sleeves.
[0006] The positioning frame is fixed to the mold by the fixing member and extends into the area to be poured of the precast component;
[0007] The positioning frame includes a first positioning plate and a second positioning plate arranged parallel to each other, and a fastening assembly; the first positioning plate is located on the side of the second positioning plate facing the precast component; the first positioning plate and the second positioning plate are provided with a plurality of positioning holes corresponding along the normal direction for inserting the pre-embedded sleeve; the diameter of the positioning hole is equal to the outer diameter of the pre-embedded sleeve.
[0008] The fastening assembly includes a fixed clamp disposed around the positioning hole, a sliding clamp slidably disposed on the first positioning plate or the second positioning plate, and a locking member; the sliding clamp is provided with a movable clamp that cooperates with the fixed clamp; the locking member is at least used to lock the engagement state of the movable clamp and the fixed clamp.
[0009] The device has a calibration seam in the area where it fits with the mold.
[0010] In a preferred embodiment, the locking member is disposed on the side of the sliding clamp away from the fixed clamp; the locking member includes an eccentric wheel rotatably disposed on the first positioning plate or the second positioning plate; the eccentric part pushes the sliding clamp towards the fixed clamp by rotation.
[0011] In a preferred embodiment, the eccentric wheel is configured with a variable diameter section and a constant diameter section, the maximum diameter of the variable diameter section being equal to the diameter of the constant diameter section; when the movable clamp and the fixed clamp are engaged to clamp the embedded sleeve, the constant diameter section abuts against the sliding clamp.
[0012] In a preferred embodiment, the locking member further includes an operating member fixedly connected to the eccentric wheel.
[0013] In a preferred embodiment, the fastening assembly further includes a guide seat; the guide seat includes a guide portion and a limiting portion; the guide portion is fixed on the first positioning plate or the second positioning plate to form a sliding track for the sliding clamp; the limiting portion is fixed to the surface of the guide portion and engages with the sliding clamp along the normal direction of the first positioning plate or the second positioning plate.
[0014] In a preferred embodiment, the fastening assembly further includes a reset member for moving the sliding clamp away from the fixed clamp.
[0015] In a preferred embodiment, a pad is also included; the pad is disposed at the bottom of the positioning frame on the side near the fixing member.
[0016] In a preferred embodiment, the calibration slit is disposed on the pad; the first positioning plate is provided with an observation port that encloses the calibration slit.
[0017] In a preferred embodiment, the first positioning plate and the second positioning plate are connected by at least two oppositely arranged connecting plates.
[0018] In a preferred embodiment, the fixing member is a lateral fixing plate connected to the outside of the mold; the lateral fixing plate is perpendicularly fixed to the first positioning plate.
[0019] Compared with the prior art, the technical solution of this utility model has the following beneficial effects:
[0020] The device provided by this utility model achieves precise control of the verticality of the pre-embedded sleeve through the double-layer structure of the positioning frame, and accurately positions the installation position of the pre-embedded sleeve in the plane through the calibration seam, ensuring the installation accuracy of the pre-embedded sleeve in multiple dimensions. The device innovatively adopts an eccentrically designed locking element to push the sliding clamping plate, achieving stable structural self-locking while quickly and stably clamping the pre-embedded sleeve. Furthermore, the tight clamping of the pre-embedded sleeve also provides the positioning frame itself with more stable vertical support. In summary, the device not only accurately positions and tightly clamps the pre-embedded sleeve, ensuring the construction quality of precast components with holes, but also is easy to operate and improves construction efficiency. In addition, in terms of usability, the device has a reasonable structural design, reliable support, and high operational stability; it is easy to load and unload, portable, and convenient for reuse. Attached Figure Description
[0021] Figure 1 This is a plan view of the device described in an embodiment of the present utility model (the fastening component is in the unlocked state);
[0022] Figure 2 This is a plan view of the device described in an embodiment of the present utility model (the fastening components are in a locked state);
[0023] Figure 3 This is a perspective view of the device described in an embodiment of the present utility model.
[0024] The markings in the diagram are as follows: 1-First positioning plate, 11-Observation port, 2-Second positioning plate, 3-Connecting plate, 4-Embedded sleeve, 51-Guide seat, 511-Guide part, 512-Limiting part, 52-Sliding clamp, 521-Through groove, 53-Modible clamp, 54-Fixed clamp, 55-Locking part, 551-Eccentric wheel, 552-Operating part, 553-Rotating shaft, 6-Reset part, 7-Padded plate, 71-Alignment seam, 8-Side fixing plate, 9-Steel mold, 10-Bolt assembly. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified and limited, the technique...
[0028] The terms “installation,” “equipped with,” “set up / connected,” and “connection” should be interpreted broadly. For example, “connection” can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0029] like Figures 1-3 As shown, this utility model embodiment provides a precast component reserved hole positioning device, which is installed on molds on both sides of the precast component. Overall, the device includes a positioning frame, a fixing component, and several embedded sleeves 4. The positioning frame adopts a double-layer structure, including a first positioning plate 1 and a second positioning plate 2 arranged parallel to each other, and a fastening assembly. The first positioning plate 1 and the second positioning plate 2 are provided with several positioning holes corresponding along the normal direction for the embedded sleeves 4 to pass through. The fastening assembly is disposed on the second positioning plate 2 to clamp or release the embedded sleeves 4. The positioning frame is fixed to the outside of the mold by the fixing component and extends into the area to be poured in the precast component. A calibration seam 71 is constructed at the bottom of the positioning frame or in the area where the fixing component fits with the mold, for accurately positioning the installation position of the embedded sleeves 4. In this embodiment, the fixing component is a plate connected to the outside of the mold, hence hereinafter referred to as a lateral fixing plate 8; the mold is a steel profile, hereinafter referred to as a steel mold 9. The following section, with reference to specific illustrations, further explains the structure and connection method of each part of the device.
[0030] like Figure 3As shown, the first positioning plate 1 is disposed on the side of the second positioning plate 2 facing the prefabricated component and is welded perpendicularly to the lateral fixing plate 8. In this embodiment, the second positioning plate 2 and the first positioning plate 1 are connected by two opposing connecting plates 3. It should be understood that in other embodiments, the connecting plates 3 may also be three or more. The first positioning plate 1 is provided with a plurality of first positioning holes spaced apart in the plane, and the second positioning plate 2 is provided with a plurality of second positioning holes. The first positioning holes and the second positioning holes correspond one-to-one along the normal direction of the first positioning plate 1 or the second positioning plate 2. The diameters of the first clearance holes and the second clearance holes are equal to the outer diameter of the pre-embedded sleeve 4, so as to limit the pre-embedded pipe along its radial direction. The positioning frame allows the pre-embedded sleeve 4 to pass perpendicularly through the positioning frame via two positioning holes spaced apart along the normal direction, ensuring that the pre-embedded sleeve 4 has a high degree of verticality during installation.
[0031] The fastening assembly is located on the side of the second positioning plate 2 facing away from the first positioning plate 1, and includes a guide seat 51, a sliding clamp 52, a fixing clamp 54, and a locking member 55. The guide seat 51 includes a guide portion 511 and a limiting portion 512. The guide portion 511 is welded to the second positioning plate 2, forming a sliding track for the sliding clamp 52. The limiting portion 512 is welded to the surface of the guide portion 511, and engages with the sliding clamp 52 along the normal direction of the second positioning plate 2 to prevent the sliding clamp 52 from flying off the second positioning plate 2 when pushed by the locking member 55. Therefore, it is necessary that the distance from the limiting portion 512 to the second positioning plate 2 is equal to the thickness of the sliding clamp 52. Figure 1 , Figure 2 As shown, in terms of planar position, in this embodiment, the sliding clamp 52 is provided with a through groove 521, and the limiting part 512 is disposed within the through groove 521 and is the same width as the through groove 521. The limiting part 512 is welded to the guide part 511 and extends on both sides in a direction perpendicular to the through groove 521, and performs a limiting engagement with the sliding clamp 52 in the out-of-plane direction. In other embodiments, the sliding clamp 52 does not need to be provided with the through groove 521. The two guide parts 511 are attached to both sides of the sliding clamp 52, and the limiting part 512 overlaps between the two guide parts 511, and performs a limiting engagement with the sliding clamp 52 in the out-of-plane direction. It should be understood that there are various structural engagement methods between the guide seat 51 and the sliding clamp 52 to achieve the same function. As this is a mature prior art, it will not be described further in this article.
[0032] like Figure 1 , Figure 2As shown, the sliding clamp 52 extends several movable clamps 53 on both sides of the sliding direction. Correspondingly, the second positioning plate 2 is welded with a fixed clamp 54 on the outer periphery of the second positioning hole. The axes of the movable clamps 53 and the fixed clamps 54 are parallel to the sliding path of the sliding clamp 52. In actual use, the movable clamps 53 follow the reciprocating sliding of the sliding clamp 52, approaching or moving away from the fixed clamps 54 at the second positioning hole to clamp or release the pre-embedded sleeve. Preferably, the inner sides of the fixed clamps 54 and the movable clamps 53 are provided with rubber pads, which can act as a buffer layer to protect the pre-embedded sleeve 4 and also stabilize the pre-embedded sleeve 4 by increasing friction.
[0033] As shown in the figure, the locking member 55 is located on the side of the sliding clamp 52 away from the fixed clamp 54. It should be understood that "away from" refers to the direction of movement of the sliding clamp 52; the same applies to "closer" in the following text. The locking member 55 adopts an eccentric structure, including an eccentric wheel 551 and an operating member 552 integrally formed with the eccentric wheel 551. The eccentric wheel 551 is rotatably mounted on the second positioning plate 2 via a rotating shaft 553. Preferably, the eccentric wheel 551 has a variable diameter section and a constant diameter section, the maximum diameter of the variable diameter section being equal to the diameter of the constant diameter section. Figure 1 As shown, when the locking member 55 is in the first position, the variable-diameter section of the eccentric wheel 551 faces the sliding clamp 52. Then, when the operating member 552 drives the eccentric wheel 551 to rotate counterclockwise to the second position, the diameter of the eccentric wheel 551 gradually increases towards the sliding clamp 52, pushing the sliding clamp 52 towards the fixed clamp 54, causing the movable clamp 53 to gradually approach the fixed clamp 54. Figure 2 As shown, when the locking member 55 reaches the second position, the movable clamp 53 engages with the fixed clamp 54, clamping the pre-embedded sleeve 4. The equal-diameter section of the eccentric wheel 551 abuts against the sliding clamp 52, preventing the eccentric wheel 551 from rotating or becoming displaced due to the reverse thrust of the sliding clamp 52. Through ingenious geometric self-locking, the engagement state of the movable clamp 53 and the fixed clamp 54 is stably locked. It should be understood that the equal-diameter section is not a necessary technical feature of the eccentric wheel 551. When the movable clamp 53 and the fixed clamp 54 are engaged, a wedge block can also be used to side-plug between the sliding clamp 52 and the eccentric wheel 551 to prevent the eccentric wheel 551 from rotating or becoming displaced.
[0034] In addition to the fixing effect provided by the lateral fixing plate 8, the positioning frame can also achieve vertical support with the help of the pre-embedded sleeve 4. Therefore, the tight clamping of the pre-embedded sleeve 4, in turn, makes the positioning frame itself have a more stable working posture.
[0035] When the locking member 55 unlocks and moves from the second position to the first position, in order to allow the sliding clamp 52 to quickly reset so that the device can be removed from the outer periphery of the pre-embedded sleeve 4, a reset member 6 is also provided on the side of the sliding clamp 52 away from the locking member 55 to push the sliding clamp 52 in the opposite direction. The structure, connection method and working principle of the reset member 6 are similar to those of the locking member 55, and will not be described in detail here. As a simple alternative to this embodiment, in other embodiments, as shown in the figure, the side of the sliding clamp 52 away from the locking member 55 can be connected to the second positioning plate 2 through a set of elastic reset members 6. When the locking member 55 unlocks, the sliding back plate automatically resets with the help of the elastic restoring force accumulated by the elastic reset members 6. The elastic reset member 6 can be made of materials such as sponge or spring.
[0036] It should be noted that, from the perspective of construction feasibility, the fastening components can also be set on the first positioning plate 1, and can achieve the same function.
[0037] like Figure 3 As shown, a pad is welded to the bottom of the first positioning plate 1 near the side fixing plate 8. In use, the pad is placed on the steel molds 9 on both sides of the precast component to be poured, raising the entire positioning frame and preventing the first positioning plate 1 from sticking to the concrete during pouring. The calibration joint 71 is set on the pad and perpendicular to the side fixing plate 8. When manufacturing the precast component, the construction personnel pre-mark the embedded sleeve 4 on the steel mold 9. By aligning the calibration joint 71 with the positioning mark on the steel mold 9, the embedded sleeve 4 can be accurately installed in the preset position. To achieve the calibration operation, the first positioning plate 1 is offset from the second positioning plate 2 along the direction close to the side fixing plate 8, so as to construct an observation port 11 enclosing the calibration joint 71 in the offset area. It should be understood that the calibration joint 71 can also be set on the side fixing plate 8 to cooperate with the positioning mark preset on the side of the steel mold 9.
[0038] The lateral fixing plate 8 is fixed to the side of the steel mold 9. For example... Figure 3As shown, in this embodiment, the fixing plate is fixed by a set of bolt assemblies 10. Specifically, the nut of the bolt assembly 10 is fixed, and the bolt, through thread engagement with the nut, presses the lateral fixing plate 8 against the outside of the steel mold 9. In other embodiments, spot welding can be used to temporarily weld the fixing plate to the steel mold 9, and then the weld is cut after manufacturing to allow for the reusability of the device. It should be understood that there are various specific fixing methods for the lateral plate, so the bolt assembly 10 should not be considered a necessary component of the device. In other embodiments, the lateral fixing plate 8 can be replaced by a section of angle iron, with one right-angled side of the angle iron fixed to the first positioning plate 1 or pad, and the other right-angled side fixed to the outside of the steel mold 9. This is a common substitution in construction engineering and should be considered a homogeneous transformation.
[0039] In this embodiment, the positioning frame and the lateral fixing plate 8 are made of steel, which is easy to manufacture and has high structural strength. The pre-embedded sleeve 4 is made of PVC pipe or steel pipe.
[0040] The device provided in this embodiment of the utility model achieves precise control of the verticality of the pre-embedded sleeve 4 through the double-layer structure of the positioning frame, and accurately positions the installation position of the pre-embedded sleeve 4 in the plane through the calibration seam 71, ensuring the installation accuracy of the pre-embedded sleeve 4 in multiple dimensions. The device innovatively uses an eccentrically designed locking member 55 to push the sliding clamp 52, achieving stable structural self-locking while quickly and stably clamping the pre-embedded sleeve 4. Furthermore, the tight clamping of the pre-embedded sleeve 4 also provides the positioning frame itself with more stable vertical support. In summary, the device not only accurately positions and tightly clamps the pre-embedded sleeve 4, ensuring the production quality of perforated prefabricated components, but also is easy to operate and improves production efficiency. In addition, in terms of usability, the device has a reasonable structural design, reliable support, high working stability; it is easy to load and unload, portable, and convenient for reuse.
[0041] The above description is merely a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All technically equivalent modifications made based on the content of the present utility model specification shall fall within the protection scope of the present utility model.
Claims
1. A precast component pre-drilled hole positioning device, installed on the mold of the precast component, characterized in that: Includes positioning frame, fasteners and several pre-embedded sleeves; The positioning frame is fixed to the mold by the fixing member and extends into the area to be poured of the precast component; The positioning frame includes a first positioning plate and a second positioning plate arranged parallel to each other, and a fastening assembly; the first positioning plate is located on the side of the second positioning plate facing the precast component; the first positioning plate and the second positioning plate are provided with a plurality of positioning holes corresponding along the normal direction for inserting the pre-embedded sleeve; the diameter of the positioning hole is equal to the outer diameter of the pre-embedded sleeve. The fastening assembly includes a fixed clamp disposed around the positioning hole, a sliding clamp slidably disposed on the first positioning plate or the second positioning plate, and a locking member; the sliding clamp is provided with a movable clamp that cooperates with the fixed clamp; the locking member is at least used to lock the engagement state of the movable clamp and the fixed clamp. The device has a calibration seam in the area where it fits with the mold.
2. The precast component pre-drilled hole positioning device according to claim 1, characterized in that: The locking element is located on the side of the sliding clamp away from the fixed clamp; the locking element includes an eccentric wheel rotatably mounted on the first positioning plate or the second positioning plate; the eccentric part pushes the sliding clamp towards the fixed clamp by rotation.
3. The precast component pre-drilled hole positioning device according to claim 2, characterized in that: The eccentric wheel has a variable diameter section and a constant diameter section, the maximum diameter of the variable diameter section is equal to the diameter of the constant diameter section; when the movable clamp and the fixed clamp are engaged to clamp the embedded sleeve, the constant diameter section abuts against the sliding clamp.
4. The precast component pre-drilled hole positioning device according to claim 2, characterized in that: The locking element also includes an operating element that is fixedly connected to the eccentric wheel.
5. The precast component pre-drilled hole positioning device according to claim 1, characterized in that: The fastening assembly further includes a guide seat; the guide seat includes a guide portion and a limiting portion; the guide portion is fixed on the first positioning plate or the second positioning plate to form a sliding track for the sliding clamp. The limiting part is fixed to the surface of the guide part and engages with the sliding clamp along the normal direction of the first positioning plate or the second positioning plate.
6. The positioning device for precast component reserved holes according to claim 1, characterized in that: The fastening assembly also includes a reset component for moving the sliding clamp away from the fixed clamp.
7. The precast component pre-drilled hole positioning device according to claim 1, characterized in that: It also includes a pad; the pad is disposed at the bottom of the positioning frame on the side near the fixing member.
8. A precast component pre-drilled hole positioning device according to claim 7, characterized in that: The calibration seam is disposed on the pad; the first positioning plate is provided with an observation port that encloses the calibration seam.
9. A precast component pre-drilled hole positioning device according to claim 1, characterized in that: The first positioning plate and the second positioning plate are connected by at least two oppositely arranged connecting plates.
10. A precast component pre-drilled hole positioning device according to claim 1, characterized in that: The fixing component is a lateral fixing plate connected to the outside of the mold; the lateral fixing plate is perpendicularly fixed to the first positioning plate.