Prefabricated truss reinforced concrete composite slab production cloth machine lower truss shielding device

Abstract

The utility model relates to concrete composite board production technical field, concretely for prefabricated truss reinforced concrete composite board production is with cloth machine lower truss shielding device, including the fixed plate symmetry welded in cloth machine hopper bottom, and the guide rod with bolt is passed in fixed plate, the guide rod is sleeved and slides in the cylinder, and the outside slide in the cylinder welds the angle steel that opens mouth vertically downward, and the threaded rod is welded at the slide in the cylinder bottom end, the threaded rod is sleeved and rotates the cylinder and fixed nut, and the rotating cylinder welds the pull rod with L type bending, and the pull rod passes through the pull hole of interval on the support plate, and the support pipe is supported in the hole in the assembly board from the both ends fixed below the angle steel, through push -and -pull pull rod, and the rotating cylinder drives the slide in the cylinder along the guide rod and slides, and the angle steel spacing is adjusted to adapt to different truss, when the device is down with cloth machine, and the angle steel accurate shielding lower truss key parts and utilize its structure shunt concrete, prevent concrete to fall into the truss, promote distribution evenness, make overall shielding effective, and adjustment is convenient and easy and the operation is labor saving.

Description

Technical Field

[0001] This utility model relates to the field of concrete composite slab production technology, specifically to a truss shielding device for the lower truss of a concrete placing machine used in the production of precast truss reinforced concrete composite slabs. Background Technology

[0002] With the rapid development of prefabricated buildings, the production of PC precast components is becoming increasingly mature. During the production process, component factories are constantly exploring and innovating, improving various aspects of the production process, and summarizing their own set of production experience. The pouring process is the most influential link in the component quality during production. Among them, the contamination of the concrete of the truss upper chord reinforcement not only affects the appearance quality of the component but also affects the bonding effect with the post-poured concrete during later use. Therefore, a shielding device is needed.

[0003] Currently, the existing production process typically involves one concrete placement operator controlling the concrete placement machine to spread the concrete, while another worker places triangular steel bars on the truss to prevent the concrete from contaminating the truss reinforcement. However, since the length of the triangular steel bars cannot meet the length of all truss components, the shielding effect is not complete. Furthermore, adding more personnel to place the triangular steel bars wastes manpower, and having the concrete placement operator place them would prolong the concrete placement cycle and affect production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a truss shielding device for the lower truss of a concrete placing machine used in the production of precast reinforced concrete composite slabs, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A shielding device for the lower truss of a concrete placing boom used in the production of precast reinforced concrete composite slabs includes two fixed plates symmetrically welded to the bottom of the placing boom's hopper. Each fixed plate has a through hole in the middle, through which a guide rod is installed. Each guide rod has a pin inserted radially at both ends. Four sliding cylinders are fitted on the outside of the guide rods and between the fixed plates. Angle steel is welded to the middle of one side of each sliding cylinder, with the opening of the angle steel pointing vertically downwards.

[0006] Preferably, threaded rods are welded to the bottom of the slide cylinder, and rotating cylinders and two fixing nuts are sequentially sleeved on the radial outer side of the threaded rods, with the fixing nuts threadedly engaged with the threaded rods.

[0007] Preferably, a pull rod is welded and installed on the radially outer side of the rotating cylinder, and the other end of the pull rod extends and passes through the pull hole to form an L-shaped pull structure.

[0008] Preferably, the holes are spaced apart on the support plate, and the support plate is fixed to the bottom of the material feeding hopper of the material placing machine and adjacent to one of the fixed plates by welding.

[0009] Preferably, the opening of the angle steel is respectively attached to the radial top of the support tube, and the two axial ends of the support tube respectively pass through the assembly hole and are fixed by welding.

[0010] Preferably, the assembly holes are respectively opened in the middle of the assembly plate, and the assembly plate is symmetrically welded to the bottom of the material feeding hopper of the material feeder and another adjacent part of the fixed plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. This precast reinforced concrete composite slab production equipment's lower truss shielding device uses adjustable angle steel components directly below the concrete placing boom's discharge port to shield key areas at the top of the lower truss, effectively preventing concrete from falling directly into it and causing pollution and cleaning difficulties. Utilizing the angle steel's geometric shape (opening vertically downwards), the falling concrete is diverted and guided to both sides. This integrated shielding and diversion structure solves the problem of truss reinforcement pollution, improves the uniformity of concrete distribution on the precast slab, reduces material waste and subsequent maintenance costs, and enhances product quality and overall production efficiency.

[0012] 2. The lower truss shielding device for the precast reinforced concrete composite slab production line consists of a linkage adjustment structure composed of a tie rod, a rotating cylinder, a threaded rod, and a fixing nut. By operating the L-shaped bent tie rod to push and pull, the rotating cylinder is driven to rotate on the threaded rod (the fixing nut prevents it from falling off and assists in fixing it). This causes the sliding cylinder with welded angle steel to slide precisely and smoothly axially along the guide rod. This adjustment structure eliminates the need for additional tools, saves effort, and is easy to operate. It can quickly and flexibly adjust the support and shielding spacing between adjacent angle steels according to the layout requirements of different truss sizes on the production line, improving the adaptability of the equipment to different working conditions. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the support tube of this utility model; Figure 3 This is a schematic diagram of the guide rod of this utility model; Figure 4 This utility model Figure 3 Enlarged diagram of point A in the middle.

[0014] In the diagram: 101, fixing plate; 102, through hole; 103, guide rod; 104, pin; 105, slide cylinder; 106, angle steel; 107, threaded rod; 108, rotating cylinder; 109, fixing nut; 110, tie rod; 111, pull hole; 112, support plate; 113, support tube; 114, assembly hole; 115, assembly plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-4 As shown, this utility model provides a technical solution: A shielding device for the lower truss of a concrete placing boom used in the production of precast reinforced concrete composite slabs includes two fixed plates 101 symmetrically welded to the bottom of the placing boom's hopper. Each fixed plate 101 has a through hole 102 in the middle. A guide rod 103 is installed through the through hole 102. Pins 104 are inserted radially at both ends of the guide rod 103. Four sliding cylinders 105 are sleeved on the outside of the guide rods 103 and between the fixed plates 101. Angle steel 106 is welded to the middle of one side of each sliding cylinder 105. The opening of the angle steel 106 is vertically downward.

[0017] The above scheme establishes a symmetrical rigid connection between the device and the bottom of the concrete placing machine through the fixing plate; provides a through-hole for the guide rod to pass through and position; forms a stable track for the linear sliding of the slide cylinder through the guide rod; locks the axial displacement of the guide rod with a pin to prevent it from falling off; realizes synchronous displacement adjustment of the angle steel position through the slide cylinder; and performs the functions of lower truss shielding and concrete diversion guidance through the angle steel.

[0018] In this embodiment, preferably, threaded rods 107 are welded to the bottom end of the slide cylinder 105, and rotating cylinders 108 and two fixing nuts 109 are sequentially sleeved on the radially outer side of the threaded rods 107, with the fixing nuts 109 threadedly engaged with the threaded rods 107.

[0019] The above scheme transmits driving force through a sliding cylinder connected to a threaded rod; the threaded rod converts the rotation of the rotating cylinder into axial movement of the sliding cylinder; the rotating cylinder drives the sliding cylinder to slide along the guide rod; and the fixing nut achieves bidirectional locking and anti-loosening of the rotating cylinder position.

[0020] In this embodiment, preferably, a pull rod 110 is welded and installed on the radially outer side of the rotating cylinder 108, and the other end of the pull rod 110 extends and passes through the pull hole 111 and is bent to form an L-shaped pulling structure.

[0021] The above scheme transmits the pushing and pulling force of the pull rod through the rotating cylinder; provides a point for manual operation through the pull rod; and provides a bending positioning fulcrum for the pull rod after it passes through through the hole, so that the L-shaped structure formed by bending can obtain spatial stability.

[0022] In this embodiment, preferably, the pull holes 111 are spaced apart on the support plate 112, and the support plate 112 is fixed to the bottom of the feed hopper of the fabric placing machine and adjacent to one of the fixed plates 101 by welding.

[0023] The above scheme constrains the swing range of the tie rod after bending by using the pull hole; the installation position of the tie rod mechanism is fixed by the support plate, and its relative relationship with the adjacent fixed plate is maintained.

[0024] In this embodiment, preferably, the opening of the angle steel 106 is respectively attached to the radial top end of the support tube 113, and the two axial ends of the support tube 113 respectively pass through the assembly hole 114 and are fixed by welding.

[0025] The above scheme achieves continuous support by attaching the angle steel to the top surface of the support pipe; the support pipe provides auxiliary guidance when the angle steel slides; and the assembly holes enable load transfer and reliable fixation at both ends of the support pipe.

[0026] In this embodiment, preferably, the assembly holes 114 are respectively opened in the middle of the assembly plate 115, and the assembly plate 115 is symmetrically welded to the bottom of the material feeder hopper and another adjacent position of the fixing plate 101.

[0027] The above scheme allows for precise positioning of the support tube through assembly holes; and the assembly plate constructs a symmetrical rigid connection interface between the support tube and the bottom of the fabric placing machine.

[0028] In this embodiment, the lower truss shielding device for the precast reinforced concrete composite slab production placing boom is used in which the fixing plate 101 is tightly fixed to the bottom of the placing boom's hopper by symmetrical welding. The support plate 112 is welded to the adjacent position of one of the fixing plates 101, and the assembly plate 115 is symmetrically welded to the adjacent position on the other side of the fixing plate 101 to form a basic support. After welding, the two ends of the support pipe 113 are firmly installed into the holes opened in the assembly plate 115 and fixed by welding. The upper surface of the support pipe 113 is exactly attached to the lower part of the front section of the angle steel 106, thereby providing stable support. The extension section of the angle steel 106 is located directly below the placing boom's discharge port, which facilitates the subsequent diversion function. This arrangement ensures that the device is fully connected to the placing boom. Rigidity prevents loosening during movement and enhances stability during long-term use. During the spacing adjustment phase, the bent portion of the pull rod 110 is manually pushed and pulled. The pull rod 110 is welded to the rotating cylinder 108 and maintains an appropriate inclination, preventing multiple pull rods 110 from colliding and interfering with each other during operation. The pushing and pulling action drives the rotating cylinder 108 to rotate along the threaded rod 107. The rotation of the rotating cylinder 108 benefits from the threaded engagement between the threaded rod 107 and the fixing nut 109, which acts as a lock to prevent the rotating cylinder 108 from falling off. During rotation, the rotating cylinder 108 rotates outside the threaded rod 107, causing the slide cylinder 105 to slide axially on the guide rod 103. An angle steel 106 is welded to the outside of the slide cylinder 105, so the angle steel 106 also slides axially. The guide rod 103 is fixed at both ends to the through holes 102 of the fixing plate 101 by the pins 104, providing a linear guide path to ensure that the sliding cylinder 105 slides smoothly and accurately. This adjustment process requires the rotating cylinder 108 to rotate on the threaded rod 107 to avoid limit jamming. Therefore, lubricating oil needs to be applied to the guide rod 103 and the threaded rod 107 regularly to ensure smooth operation. The reserved gap between the support tube 113 and the placing boom allows the angle steel 106 to slide freely. At the same time, the support tube 113 provides auxiliary guidance for the angle steel 106, so that the spacing of the angle steel 106 can be flexibly adjusted according to different truss sizes, and quick adaptation can be achieved without tools. When entering the working execution stage, the placing boom moves down as a whole, driving the entire machine to move forward. The device, comprising a fixed plate 101, a support pipe 113, and a movable angle steel 106, descends to a preset position. The open end of the angle steel 106 points vertically downward, precisely covering the top of the lower truss and shielding key parts of the truss. Simultaneously, the triangular structure of the angle steel 106 acts as a diversion effect. When concrete falls from the discharge port of the concrete placing boom, it directly impacts the diversion surface of the angle steel 106 and is evenly guided to both sides, preventing concrete from falling directly onto the surface of the lower truss. In the coordinated operation of the components, the tie rod 110 passes through the spaced pull holes 111 on the support plate 112 to form an L-shaped structure, facilitating the application of pushing and pulling forces by the operator. After adjustment, the angle steel 106 remains fixed in position under the support of the support pipe 113, ensuring that the falling concrete only contacts the angle steel 106 and does not touch the truss.Overall, this design significantly reduces the risk of concrete contamination of the lower truss, improves the uniformity of concrete distribution, thereby reducing material waste and maintenance costs, and improving the efficiency and quality of precast reinforced concrete composite slab production. The basic principles, main features, and advantages of this utility model have been shown and described above. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples of this utility model and are not intended to limit it. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A truss shielding device for a concrete placing boom used in the production of precast reinforced concrete composite slabs, comprising two symmetrically welded fixing plates (101) to the bottom of the placing boom's hopper, characterized in that: The fixing plate (101) has a through hole (102) in the middle. A guide rod (103) is installed through the through hole (102). Pins (104) are inserted radially through both ends of the guide rod (103). Four sliding cylinders (105) are sleeved on the outside of the guide rod (103) and between the fixing plates (101). Angle steel (106) is welded to the middle of the radially outer side of each sliding cylinder (105). The opening of the angle steel (106) is vertically downward.

2. The truss shielding device for the lower truss of the concrete placing machine for producing precast reinforced concrete composite slabs according to claim 1, characterized in that: The bottom end of the slide cylinder (105) is welded with a threaded rod (107). The outer radial side of the threaded rod (107) is fitted with a rotating cylinder (108) and two fixing nuts (109). The fixing nuts (109) are threadedly engaged with the threaded rod (107).

3. The truss shielding device for the lower truss of the concrete placing machine for producing precast reinforced concrete composite slabs according to claim 2, characterized in that: Pull rods (110) are welded and installed on the radially outer side of the rotating cylinder (108). The other end of the pull rods (110) extends and passes through the pull holes (111) and is bent to form an L-shaped pull structure.

4. The truss shielding device for the lower truss of the concrete placing machine for producing precast reinforced concrete composite slabs according to claim 3, characterized in that: The pull holes (111) are spaced apart on the support plate (112), and the support plate (112) is fixed to the bottom of the feed hopper of the fabric placing machine and adjacent to one of the fixed plates (101) by welding.

5. The truss shielding device for the lower truss of the concrete placing machine for producing precast reinforced concrete composite slabs according to claim 4, characterized in that: The opening of the angle steel (106) is respectively attached to the radial top of the support tube (113), and the two ends of the support tube (113) are respectively inserted into the assembly hole (114) and fixed by welding.

6. The truss shielding device for the lower truss of the concrete placing machine for producing precast reinforced concrete composite slabs according to claim 5, characterized in that: The assembly holes (114) are respectively opened in the middle of the assembly plate (115), and the assembly plate (115) is symmetrically welded to the bottom of the feeder hopper and the other adjacent part of the fixing plate (101).

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