Precise fixing device for embedded box of residential building wall

Abstract

The invention discloses a precise fixing device for an embedded box of a residential building wall, and relates to the technical field of building equipment, the precise fixing device comprises an embedded box main body, the embedded box main body is embedded in a reinforcing steel bar, two first pressing plates are symmetrically arranged at the top of the embedded box main body, and arc-shaped grooves are formed in the opposite sides of the two first pressing plates; the two sides of the second pressing plate are inserted into the arc-shaped grooves in a sliding mode to form a complete pressing plate; the through holes penetrate through the first pressing plate and the second pressing plate along the notch edge of the arc-shaped groove; according to the embedded box body, after concrete is poured, the concrete extrudes the first pressing plate or the second pressing plate to enable the first pressing plate and the second pressing plate to move downwards together, then the penetrating hole is shrunk, the embedded box body is welded in the steel bar reserved space, the steel bars are clamped through the penetrating hole, the supporting strength is enhanced, and the pressure of the concrete is converted into extrusion force through the pressing plates to be transmitted to the steel bars; pressure on the embedded box body is dispersed, the top flatness is guaranteed, deformation caused by excessive local pressure is avoided, and the embedded box is tightly connected with the steel bars.

Description

Technical Field

[0001] The invention relates to the technical field of building equipment, and in particular to a precise fixing device for a pre-embedded box in a residential building wall. Background Art

[0002] Various electrical equipment needs to be installed in residential buildings, such as distribution boxes, switches and sockets, low-voltage boxes, etc. The embedded boxes are set in the wall in advance to provide installation space for these equipment, making the installation process more convenient and efficient. During construction, the corresponding space is generally reserved in the steel structure of the wall according to the size and position requirements of the embedded boxes. Then, during the construction process such as pouring concrete, the embedded boxes are integrated with the wall. This ensures that the embedded boxes are installed firmly, accurately positioned, and more closely integrated with the wall.

[0003] Since the interior of the embedded box is empty, when the weight of the concrete is applied to it, the top of the embedded box will bend and deform because it cannot withstand the pressure.

[0004] First, the uneven and deformed top of the embedded box will affect the subsequent construction. For example, when installing electrical equipment or other supporting facilities, the uneven surface will make it difficult to install the equipment smoothly, requiring additional adjustments and processing. Moreover, in some places with high requirements for appearance, such as high-end office buildings and commercial centers, the uneven top of the embedded box will destroy the overall decorative effect and reduce the quality and value of the building.

[0005] In the prior art, some high-strength supporting materials such as steel pipes and wooden blocks are often placed inside the embedded box. During the concrete pouring process, these supporting materials can bear part of the pressure, thereby reducing the pressure on the embedded box to a certain extent and preventing the deformation of the embedded box.

[0006] This method has obvious limitations. It can only support the areas that are in direct contact with structures such as steel pipes. In fact, after the concrete is poured, the areas that are not in contact with the supporting materials will still bend, and even appear to be slightly higher in the areas in contact with the supporting materials, while the areas in a suspended state are relatively low, making the top of the embedded box still uneven. Summary of the invention

[0007] The object of the present invention is to provide a precise fixing device for a pre-embedded box in a residential building wall, so as to solve the problems raised in the above-mentioned background technology.

[0008] In order to solve the above technical problems, the present invention provides a precise fixing device for a pre-embedded box in a residential building wall, comprising an embedded box main body, buried in steel bars, and comprising two first pressure plates, symmetrically arranged on the top of the embedded box main body, and arc-shaped grooves are arranged on opposite sides of the two first pressure plates; a second pressure plate, slidably inserted in the arc-shaped grooves on both sides to form a complete pressure plate; a plurality of through holes are arranged along the notch edges of the arc-shaped grooves, penetrating the first pressure plate and the second pressure plate, for gradually shrinking the through holes when the first pressure plate and / or the second pressure plate are under pressure.

[0009] Furthermore, the perforations include a plurality of first perforations formed on the first pressing plate and a plurality of second perforations formed on the second pressing plate, and the width of the first perforations is smaller than the width of the second perforations.

[0010] Furthermore, a longitudinal section in the through hole parallel to the front side of the embedded box body gradually extends from top to bottom in a direction away from the center of the hole, and a wrapping belt is installed on the inner wall of the first through hole, and the installation points at both ends are close to the bottom end of the first through hole.

[0011] Furthermore, a load-bearing belt is installed at the bottom of the second pressing plate, and one end of the wrapping belt away from the first through hole is connected to the outer wall of the load-bearing belt.

[0012] Furthermore, multiple groups of buffer mechanisms are arranged between the two first pressure plates; the buffer mechanism includes a connecting plate installed on the outer wall of one of the first pressure plates, and the connecting plate is provided with multiple trapezoidal openings; multiple strip plates are installed on the outer wall of the other first pressure plate at equal intervals, and the strip plates intersect with the trapezoidal openings.

[0013] Furthermore, the trapezoidal opening narrows from an end away from the first pressing plate to an end close to the first pressing plate, and the inner wall of the trapezoidal opening is in close contact with the outer wall of the strip plate.

[0014] Furthermore, the connecting plate and the strip plate are both sleeved with a fixing plate, the fixing plate is provided with a plurality of slots, and the plurality of fixing plates are respectively sleeved on the strip plate and the connecting plate through the slots.

[0015] Furthermore, a top plate is arranged on the connecting plate and the strip plate, and a plurality of slot-shaped openings are opened on the top plate, the inner walls of the slot-shaped openings are butted against the steel bars, and the bottoms of the slot-shaped openings are butted against the outer walls of the fixing plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, after pouring concrete, the concrete squeezes the first pressing plate or the second pressing plate to move the first pressing plate and the second pressing plate downward together, thereby reducing the perforation, welding the main body of the embedded box in the reserved space for the steel bars, and clamping the steel bars through the perforations to enhance the support strength. The pressure of the concrete is converted into an extrusion force through the pressing plate and transmitted to the steel bars, dispersing the pressure on the main body of the embedded box, ensuring the flatness of the top thereof, avoiding deformation due to excessive local pressure, and making the embedded box tightly connected to the steel bars.

[0018] 2. In the present invention, when the first perforation and the second perforation top squeeze the steel bar, the bottoms of the two will move away from each other and pull the winding belt to tighten. When it tightens, the friction force increases to prevent sliding. The winding belt cooperates with the perforation to squeeze the steel bar, which reduces the pressure of the pressure plate on the embedded box body. Part of the pressure is transmitted to the side ribs and then to the steel bar, reducing the pressure on the top of the embedded box body, making it difficult for the pressure plate to continue to move down close to the embedded box body.

[0019] 3. In the present invention, the second pressure plate is easily collapsed and bent downward due to the squeezing of concrete. As it presses downward, the load-bearing belt gradually straightens and pulls the wrapping belt to tighten. When the load-bearing belt is tight, the internal fibers are tightly ordered and can better withstand vertical pressure, thereby enhancing the overall load-bearing capacity of the second pressure plate. For heavier concrete, the tight load-bearing belt can effectively disperse the weight, reduce local excessive stress, and improve the load-bearing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the connection structure between the embedded box body and the first pressing plate in the present invention;

[0022] Figure 3 It is a schematic diagram of the connection structure between the first pressing plate and the second pressing plate in the present invention;

[0023] Figure 4 It is a schematic diagram of the connection structure between the connection plate and the strip plate in the present invention;

[0024] Figure 5 It is a schematic diagram of the connection structure between the fixing plate and the slot in the present invention;

[0025] Figure 6 It is a schematic diagram of the connection structure between the first pressing plate and the perforation in the present invention;

[0026] Figure 7 It is a schematic diagram of the connection structure between the second pressing plate and the winding belt in the present invention;

[0027] Figure 8 It is a schematic diagram of the connection structure between the second pressing plate and in the present invention.

[0028] In the figure: 1. Embedded box main body;

[0029] 2. First pressing plate; 3. Second pressing plate; 4. Perforation; 401. First perforation; 402. Second perforation;

[0030] 5. Connecting plate; 6. Strip plate; 7. Top plate; 8. Grooved opening; 9. Load-bearing belt; 10. Arc groove; 11. Fixed plate; 12. Trapezoidal opening; 13. Slot; 14. Wrapping belt. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The present invention provides a technical solution:

[0033] See also Figure 1-Figure 8 As shown, a precise fixing device for a pre-embedded box in a wall of a residential building comprises a pre-embedded box body 1, which is buried in steel bars, and comprises two first pressing plates 2, which are symmetrically arranged on the top of the pre-embedded box body 1, and arc grooves 10 are arranged on opposite sides of the two first pressing plates 2; a second pressing plate 3, which is slidably inserted in the arc grooves 10 on both sides to form a complete pressing plate; a plurality of through holes 4, which are arranged along the notch edges of the arc grooves 10 and penetrate the first pressing plate 2 and the second pressing plate 3, and are used for gradually shrinking the through holes 4 when the first pressing plate 2 and / or the second pressing plate 3 are under pressure.

[0034] First, insert the second pressing plate 3 into the two first pressing plates 2, then bend the first pressing plate 2 and the second pressing plate 3 into an arc shape, and then weld the first pressing plate 2 to the top of the embedded box body 1. At this time, the first pressing plate 2 and the second pressing plate 3 are fixed to the top of the embedded box body 1 in an arc shape, and then pour concrete;

[0035] When concrete falls onto the second pressing plate 3 or the first pressing plate 2, due to gravity and weight, the concrete will squeeze the second pressing plate 3 and the first pressing plate 2, and move the first pressing plate 2 and the second pressing plate 3 downward. After the second pressing plate 3 moves downward, it will squeeze the two first pressing plates 2, and then the suspended parts of the second pressing plate 3 and the first pressing plate 2 will move closer to the top of the embedded box body 1;

[0036] When the suspended part of the first pressing plate 2 approaches the top of the embedded box body 1, the first pressing plate 2 will slowly become parallel, and at the same time, the two first pressing plates 2 will also approach each other. When the two first pressing plates 2 approach, they will gradually "swallow" the second pressing plate 3, and the two sides of the second pressing plate 3 located inside the first pressing plate 2 will also move toward the inside of the first pressing plate 2 at the same time. Therefore, when the first pressing plate 2 and the second pressing plate 3 gradually become flat, the second pressing plate 3 will slide toward the inside of the first pressing plate 2, and the two first pressing plates 2 will also swing relatively. Therefore, as the first pressing plate 2 and the second pressing plate 3 approach, the perforation 4 will gradually shrink;

[0037] According to the size and position requirements of the embedded box, a corresponding space is reserved in the tied steel bars, and then the embedded box body 1 is welded in the reserved space through angle steel. Therefore, when the embedded box body 1 is placed in the reserved space in the steel bars, part of the steel bars will contact the outer wall of the embedded box body 1, and the perforation 4 is the space reserved for the steel bars;

[0038] Before the embedded box body 1 is placed in the space reserved for the steel bars, the first pressing plate 2 and the second pressing plate 3 are placed first, and then the steel bars are passed through the perforations 4. Figure 7 and Figure 8 As shown in , the steel bar is located in the perforation 4, then the first pressing plate 2 and the second pressing plate 3 are lifted and moved upward, and then the embedded box body 1 is placed in the reserved space, and then the first pressing plate 2 is welded to the top of the embedded box body 1;

[0039] When the perforations 4 shrink, the perforations 4 will clamp the steel bars. As the first pressing plate 2 and the second pressing plate 3 continue to move downward due to the greater pressure of the concrete, the perforations 4 will further shrink, increasing the clamping force on the steel bars, thereby increasing the support strength. After the perforations 4 clamp the steel bars, the embedded box body 1 and the surrounding steel bars can form a tighter connection. The heavier the weight of the concrete, the tighter the perforations 4 clamp the steel bars.

[0040] The pressure exerted by the concrete is transmitted to the first pressing plate 2 and the second pressing plate 3, and the first pressing plate 2 and the second pressing plate 3 convert the pressure into a force for squeezing the steel bars, and transmit the force to the steel bars, so as to better disperse the pressure exerted by the concrete on the embedded box body 1, further ensure the flatness of the top of the embedded box body 1, and in this way, the pressure on the top of the embedded box body 1 can be evenly dispersed to the surrounding steel bars, further avoiding deformation and bending caused by excessive local pressure;

[0041] When pouring concrete, it is necessary to clamp both sides of the steel bar with a wooden board, and then pour concrete into the steel bar between the two wooden boards. Since both sides of the embedded box body 1 extend to the outside of the steel bar, the outer wall of the embedded box body 1 will fit with the wooden board when the wooden board is placed, and the outer walls of both sides of the first pressing plate 2 and the second pressing plate 3 will also fit with the wooden board. Therefore, concrete will not be poured directly onto the top of the embedded box body 1, that is, the area between the top of the embedded box body 1 and the first pressing plate 2 and the second pressing plate 3, to avoid affecting the downward movement of the first pressing plate 2 and the second pressing plate 3;

[0042] The upper structure not only increases the stability of the embedded box body 1 in the concrete, but also can better withstand the pressure from the concrete. In the building structure, steel bars are one of the main load-bearing components. Through the close combination with the steel bars, the embedded box body 1 can be better integrated into the overall structure and jointly bear the load of the building.

[0043] See also Figure 3-Figure 8 The through holes 4 include a plurality of first through holes 401 formed on the first pressing plate 2 and a plurality of second through holes 402 formed on the second pressing plate 3 . The width of the first through holes 401 is smaller than the width of the second through holes 402 .

[0044] The perforation 4 is composed of a first perforation 401 and a second perforation 402, and the steel bar is located between the first perforation 401 and the second perforation 402. When the second pressing plate 3 is close to the first pressing plate 2, the second perforation 402 is close to the first perforation 401, and when the two first pressing plates 2 swing relative to each other, the first perforation 401 is also close to the second perforation 402, and then the first perforation 401 and the second perforation 402 are close to each other, so as to achieve the effect of contraction of the perforation 4;

[0045] When the second pressing plate 3 moves toward the inside of the first pressing plate 2, part of the second through hole 402 moves along the inside of the first pressing plate 2, that is, on both sides of the first through hole 401. Therefore, the first through hole 401 is located inside the second through hole 402, so that the second pressing plate 3 and the second through hole 402 can move together.

[0046] The perforation 4 is a trapezoid that is narrow at the top and wide at the bottom. Therefore, when the perforation 4 contracts, the top of the first perforation 401 and the top of the second perforation 402 will approach and squeeze the steel bar.

[0047] See also Figure 7-Figure 8 The longitudinal section of the through hole 4 parallel to the front side of the embedded box body 1 gradually extends from top to bottom in a direction away from the center of the hole. The inner wall of the first through hole 401 is installed with a winding belt 14, and the installation points at both ends are close to the bottom end of the first through hole 401.

[0048] When the perforation 4 contracts, the top of the first perforation 401 and the top of the second perforation 402 will approach and squeeze the steel bar, while the bottoms of the first perforation 401 and the second perforation 402 will move away from each other. The first perforation 401 and the second perforation 402 are connected by the wrapping belt 14.

[0049] After the first pressing plate 2 and the second pressing plate 3 are fixed to the top of the embedded box body 1, the two ends of the wrapping belt 14 can be fixed to the inner walls of the first through hole 401 and the second through hole 402 respectively by steel nails, and the wrapping belt 14 is wrapped around the steel bar before fixing, so that when the bottoms of the first through hole 401 and the second through hole 402 are away from each other, the two ends of the wrapping belt 14 will be pulled to separate.

[0050] When the two ends of the wrapping belt 14 are separated, the circle of the wrapping belt 14 wrapped around the steel bar will be continuously reduced. As the wrapping belt 14 is tightened, the friction between the wrapping belt 14 and the steel bar will increase. Since the wrapping belt 14 is tightened, it will be tightly pressed on the steel bar, making the contact between the two closer, so that the friction force is also increased accordingly. This friction force can prevent the wrapping belt 14 from sliding on the steel bar, and then make it difficult for the first pressing plate 2 and the second pressing plate 3 to continue to move down close to the embedded box body 1;

[0051] The wrapping belt 14 cooperates with the perforation 4 to squeeze the steel bar, thereby reducing the pressure exerted by the first pressure plate 2 and the second pressure plate 3 on the embedded box body 1, and further reducing the pressure on the top of the embedded box body 1. When the first pressure plate 2 and the second pressure plate 3 are deformed, they will not only transfer force to the steel bar, but also transfer part of the pressure to the solid parts on both sides of the embedded box body 1, that is, the side edges of the embedded box body 1. The side edges of the embedded box body 1 are solid and not suspended. Since the embedded box body 1 is welded to the steel bar, the force is transferred to the side edges of the embedded box body 1 and will also be directly transferred to the steel bar.

[0052] See also Figure 7 A load-bearing belt 9 is fixedly installed at the bottom of the second pressing plate 3 , and one end of the wrapping belt 14 away from the first through hole 401 is fixedly connected to the outer wall of the load-bearing belt 9 .

[0053] The load-bearing belt 9 will gradually straighten as the second pressure plate 3 is pressed downward, and the load-bearing belt 9 will gradually pull the wrapping belt 14 as it straightens. Therefore, when the wrapping belt 14 is tightened, the load-bearing belt 9 is also in a straightened state. Since the second pressure plate 3 is located in the middle part, the second pressure plate 3 is easily collapsed and bent downward after being squeezed by the concrete. By making the load-bearing belt 9 tight, the fibers inside it will be stretched and arranged more tightly and orderly, which enables the load-bearing belt 9 to better withstand the pressure in the vertical direction, thereby enhancing the overall load-bearing capacity of the load-bearing belt 9 and the second pressure plate 3. For heavier concrete, the tight load-bearing belt 9 can more effectively disperse its weight and reduce local excessive stress.

[0054] See also Figure 2-Figure 5 , multiple groups of buffer mechanisms are arranged between the two first pressure plates 2; the buffer mechanism includes a connecting plate 5, which is fixedly installed on the outer wall of one of the first pressure plates 2, and the connecting plate 5 has a plurality of trapezoidal openings 12; a plurality of strip plates 6, which are fixedly installed on the outer wall of the other first pressure plate 2 at equal intervals, and the strip plates 6 intersect with the trapezoidal openings 12.

[0055] The connecting plate 5 and the strip plate 6 are welded to the first pressing plate 2 by welding. The connecting plate 5 and the strip plate 6 are crossed together. The strip plate 6 extends into the trapezoidal opening 12. When the weight of the concrete falls on the strip plate 6 and the connecting plate 5, the strip plate 6 and the connecting plate 5 will swing downward at the same time. Since the outer wall of the strip plate 6 is in close contact with the inner wall of the trapezoidal opening 12, the strip plate 6 and the connecting plate 5 will generate friction with each other when they swing downward together.

[0056] The strip plate 6 rubs against the trapezoidal opening 12 , thereby reducing the pressure on the first pressing plate 2 and the second pressing plate 3 after the connecting plate 5 and the strip plate 6 move downward.

[0057] See also Figure 2-Figure 5 The trapezoidal opening 12 narrows from one end away from the first pressing plate 2 to one end close to the first pressing plate 2 , and the inner wall of the trapezoidal opening 12 is in close contact with the outer wall of the strip plate 6 .

[0058] After the strip plate 6 and the connecting plate 5 swing downward, the strip plate 6 will slowly move to the bottom of the trapezoidal opening 12, that is, the position where the trapezoidal opening 12 is connected to one of the first pressure plates 2. Since the trapezoidal opening 12 becomes narrower from the end far away from the first pressure plate 2 to the end close to the first pressure plate 2, as the strip plate 6 gradually approaches the narrow end of the trapezoidal opening 12, the extrusion of the trapezoidal opening 12 on the strip plate 6 will become greater and greater, thereby increasing the friction between the strip plate 6 and the trapezoidal opening 12, and further reducing the extrusion of the first pressure plate 2 and the second pressure plate 3 by the strip plate 6 and the connecting plate 5 after moving downward.

[0059] See also Figure 3 and Figure 5 The connecting plate 5 and the strip plate 6 are both sleeved with a fixing plate 11 , and the fixing plate 11 is provided with a plurality of slots 13 . The plurality of fixing plates 11 are respectively sleeved on the strip plate 6 and the connecting plate 5 through the slots 13 .

[0060] After the connecting plate 5 and the strip plate 6 are fixed on the first pressing plate 2, a plurality of fixing plates 11 are respectively sleeved on the outer walls of the plurality of strip plates 6 and the connecting plate 5 in each group. Since the strip plates 6 and the connecting plate 5 are spaced apart from each other, the pressure of the concrete will cause uneven force, specifically, some strip plates 6 and the connecting plate 5 will be partially bent, so that the connecting plate 5 and the strip plates 6 cannot be in the same plane and tilt together;

[0061] A plurality of strip plates 6 or a plurality of connecting plates 5 are connected together by a fixing plate 11. When some connecting plates 5 or strip plates 6 are subjected to stress, the force can be transmitted to the remaining connecting plates 5 or strip plates 6 through the fixing plate 11, so that the pressure can be distributed to avoid excessive local pressure.

[0062] See also Figure 1-Figure 3 A top plate 7 is provided on the connecting plate 5 and the strip plate 6. The top plate 7 has a plurality of slot openings 8. The inner walls of the slot openings 8 abut against the steel bars, and the bottoms of the slot openings 8 abut against the outer walls of the fixing plate 11.

[0063] After the connecting plate 5 and the strip plate 6 are fixed, the top plate 7 is placed on the top of the fixing plate 11. The top plate 7 does not need to be fixed together with the fixing plate 11. The top plate 7 is made of soft plastic. Therefore, after the top plate 7 is placed on the connecting plate 5 and the strip plate 6, concrete is directly poured on the top plate 7. Then the top plate 7 will deform and fit the shape of the intersecting part of the connecting plate 5 and the strip plate 6, that is, a "V" shape;

[0064] The top plate 7 is fitted with the steel bar through the groove opening 8, the inner wall of the groove opening 8 is against the steel bar, and the two sides of the top plate 7 are also against the wooden board outside the steel bar. There are two advantages of pouring concrete on the top plate 7. The first is to prevent the concrete from flowing directly into the trapezoidal opening 12, that is, the gap between the strip plate 6 and the connecting plate 5. The second is to prevent the concrete from directly entering the perforation 4, because when the concrete flows down from the two sides of the top plate 7, the concrete will pass through the perforation 4 and flow directly onto the first pressing plate 2;

[0065] When the concrete gradually increases and is about to flow into the through hole 4, the through hole 4 has completed its contraction at this time, because when the concrete falls on the top plate 7, it has already squeezed the top plate 7, and then squeezed the connecting plate 5 and the strip plate 6. When the connecting plate 5 and the strip plate 6 swing downward, the first pressing plate 2 will also swing together, and the second pressing plate 3 will also move down together. At this time, the through hole 4 has squeezed the steel bar, and then the concrete flows into the through hole 4. Since the concrete is liquid before solidification, it will not affect the continued contraction of the through hole 4. Even if the stone in the concrete falls into the through hole 4, it will only make the first through hole 401 and the second through hole 402 stick more tightly.

Claims

1. A precise fixing device for a pre-embedded box in a residential building wall, comprising a pre-embedded box body (1), which is embedded in a steel bar, and is characterized in that: include, Two first pressing plates (2) are symmetrically arranged on the top of the embedded box body (1), and arc-shaped grooves (10) are arranged on opposite sides of the two first pressing plates (2); The second pressing plate (3) is slidably inserted into the arc-shaped groove (10) on both sides to form a complete pressing plate; A plurality of perforations (4) are arranged along the notch edge of the arc-shaped groove (10) and penetrate the first pressing plate (2) and the second pressing plate (3), and are used to gradually shrink the perforations (4) when the first pressing plate (2) and / or the second pressing plate (3) are pressed.

2. A precise fixing device for a pre-embedded box in a residential building wall as claimed in claim 1, characterized in that: The perforations (4) include a plurality of first perforations (401) formed on the first pressing plate (2) and a plurality of second perforations (402) formed on the second pressing plate (3), wherein the width of the first perforations (401) is smaller than the width of the second perforations (402).

3. A precise fixing device for a pre-embedded box in a residential building wall as claimed in claim 2, characterized in that: A longitudinal section of the through hole (4) parallel to the front side of the embedded box body (1) gradually extends from top to bottom in a direction away from the center of the hole, and a wrapping belt (14) is installed on the inner wall of the first through hole (401), and the installation points at both ends are close to the bottom end of the first through hole (401).

4. A precise fixing device for a pre-embedded box in a residential building wall as claimed in claim 3, characterized in that: A load-bearing belt (9) is installed at the bottom of the second pressing plate (3), and one end of the wrapping belt (14) away from the first through hole (401) is connected to the outer wall of the load-bearing belt (9).

5. A precise fixing device for a pre-embedded box in a residential building wall as claimed in claim 4, characterized in that: A plurality of buffer mechanisms are arranged between the two first pressing plates (2); The buffer mechanism comprises a connecting plate (5) mounted on the outer wall of one of the first pressing plates (2), wherein the connecting plate (5) is provided with a plurality of trapezoidal openings (12); A plurality of strip plates (6) are installed at equal intervals on the outer wall of another first pressing plate (2), and the strip plates (6) intersect with the trapezoidal opening (12).

6. A precise fixing device for a pre-embedded box in a residential building wall as claimed in claim 5, characterized in that: The trapezoidal opening (12) narrows from an end away from the first pressing plate (2) to an end close to the first pressing plate (2), and the inner wall of the trapezoidal opening (12) is in close contact with the outer wall of the strip plate (6).

7. A precise fixing device for a pre-embedded box in a residential building wall as claimed in claim 6, characterized in that: The connecting plate (5) and the strip plate (6) are both sleeved with a fixing plate (11), the fixing plate (11) is provided with a plurality of slots (13), and the plurality of fixing plates (11) are sleeved on the strip plate (6) and the connecting plate (5) respectively through the slots (13).

8. A precise fixing device for a pre-embedded box in a residential building wall as claimed in claim 6, characterized in that: A top plate (7) is provided on the connecting plate (5) and the strip plate (6), and a plurality of slot-shaped openings (8) are provided on the top plate (7), wherein the inner walls of the slot-shaped openings (8) abut against the steel bars, and the bottoms of the slot-shaped openings (8) abut against the outer walls of the fixing plate (11).

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