Plastic strip elastic locking device for air brick slit production
By using screws and elastic elements to keep the plastic strips vertically taut during the production of breathable brick slits, the problem of plastic strip twisting and deformation was solved, achieving vertical and uniform distribution of the breathable channels, thus improving product quality and production efficiency.
Patent Information
- Application Number
- CN202520310037.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-26
AI Technical Summary
During the production of permeable bricks with narrow joints, the plastic strips are prone to twisting and deformation due to improper fixing and vibration and squeezing during the pouring process. This results in the ventilation channels failing to achieve the vertical and uniform distribution required by the design, affecting the ventilation effect and product quality of the permeable bricks.
A screw and elastic element are installed between the upper clamp and the mold cylinder to keep the plastic strip vertically taut through elastic force, avoiding twisting, deformation and loosening. Wing screws are used to facilitate adjustment of the clamp position and ensure that the plastic strip remains stable during the casting process.
It effectively improves the production efficiency and quality of breathable bricks, ensuring that the air channels are vertically connected and evenly distributed from top to bottom, thus improving the air circulation effect of the product.
Smart Images
Figure CN223890216U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of narrow-slot permeable brick production technology, specifically relating to an elastic anti-loosening device for plastic strips used in the production of narrow slots in permeable bricks. Background Technology
[0002] Permeable bricks are important functional refractory materials in modern steelmaking technology. They mainly play a role in the ladle refining process such as LF and VD by blowing gas into the molten steel. By continuously blowing in gas (mainly argon), the molten steel can be continuously tumbled, thereby causing inclusions in the molten steel to float to the surface, purifying the composition of the molten steel, and uniformizing the temperature of the molten steel.
[0003] According to their production process and air permeability principle, permeable bricks can be divided into slit type, ring-slit type, and diffused type. Most steel mills in China use slit type permeable bricks. Slit type permeable bricks have several narrow air permeability channels running vertically from top to bottom inside, evenly distributed in a star-shaped radial pattern within the brick core. These air permeability channels are fundamental to the air permeability function of the brick; therefore, the design and production of these channels directly affect the performance of the permeable brick.
[0004] Currently, the common method for manufacturing slit-type permeable bricks involves cutting a polymer plastic film into several strips according to the designed width and length of the slit. The ends of these strips are then fixed to the upper and lower clamps of the permeable brick mold. The lower clamp is pressed and fixed by the mold sleeve, while the upper clamp is tightened upwards by a nut on the sleeve screw, thus straightening the plastic strips. After the permeable brick casting material is added to the mold, the strips are demolded, cured, and fired at high temperature to melt and evaporate. The space left after the plastic strips evaporate becomes the permeable channel. In the production process of slit-type permeable bricks, especially star-shaped slit-type permeable bricks, the ideal permeable channel should be vertically continuous from top to bottom and evenly radially distributed. However, during the process of adding casting material into the mold, the plastic strips are prone to twisting and deformation for two reasons: first, the way the plastic strips are fixed in the upper and lower clamps does not allow them to remain vertical and taut; second, during the casting process, under the combined influence of mold vibration and the pressure of the casting material on the plastic strips, the strips will twist, deform, and loosen. Although some of the plastic strips will recover under vibration as the refractory flows, some will still twist and deform. This causes the final air channels to become twisted and deformed, failing to achieve the vertical alignment required by the design, thus affecting the airflow performance of the permeable bricks. Summary of the Invention
[0005] To solve the above-mentioned technical problems, this utility model provides an elastic anti-loosening device for plastic strips in the production of slits in breathable bricks. A screw and elastic element are set between the upper clamp and both sides of the breathable brick mold cylinder to apply elastic force to keep the plastic strip in a vertical and taut state. This avoids the twisting, deformation and loosening of the plastic strip caused by mold vibration and casting material extrusion during the casting process, effectively improving product production efficiency and quality.
[0006] The technical solution adopted by this utility model is: an elastic anti-loosening device for plastic strips used in the production of narrow gaps in breathable bricks, including an upper clamp and a lower clamp. The mold cylinder is a hollow conical cylinder. The upper clamp is located above the mold cylinder, and the lower clamp is located at the bottom of the mold cylinder. Support plates are symmetrically fixed on the outer walls of the upper two sides of the mold cylinder. A through hole is opened at the center of the support plate. Fixing holes are symmetrically provided on both sides of the upper clamp. The upper clamp and the mold cylinder are connected by a screw that passes vertically through the fixing hole of the upper clamp and the through hole of the support plate. An elastic element is sleeved on the screw between the bottom of the upper clamp and the upper part of the support plate.
[0007] The upper clamp includes upper clamp A and upper clamp B, which are fitted together vertically. The centers of upper clamp A, upper clamp B, lower clamp and mold cylinder are on the same vertical line.
[0008] The upper clamp A, upper clamp B, and lower clamp are all circular plate structures with slits evenly distributed in the middle. The shape, size, and position of the slits on the upper clamp A, upper clamp B, and lower clamp are all consistent.
[0009] The upper clamp B is a small disc-shaped plate structure with integrated symmetrical mounting side plates on both sides, and fixing holes are opened on the mounting side plates.
[0010] The upper clamp B has symmetrical arc-shaped holes and fixing holes on both sides. The arc-shaped holes are located inside the fixing holes, and the fixing holes are through holes.
[0011] The upper clamp A has symmetrical threaded holes on both sides. The threaded holes of the upper clamp A are matched with the arc-shaped holes of the upper clamp B in terms of position and size. The upper clamp A and the upper clamp B are connected and fixed by wing screws that pass through the threaded holes and the arc-shaped holes. The upper clamp A can rotate and adjust its relative position with the upper clamp B within the arc length range of the arc-shaped hole.
[0012] Nut A is provided on the screw above the upper clamp B, nut B is provided below the elastic element, and nut C is provided above the support plate.
[0013] A plastic strip is vertically inserted into the slits of the lower clamp, upper clamp B, and upper clamp A, as well as into the mold cylinder. One end of the plastic strip is fitted with a rivet and fixed to the bottom of the lower clamp, while the other end of the plastic strip extends out through the slit of the upper clamp A.
[0014] The thickness of the plastic strip is 0.1-0.3 mm, preferably PET film.
[0015] The elastic element is not limited to the elastic part of the mold spring, and the maximum load value of the elastic element is 1000-1500N.
[0016] The upper clamp and the mold cylinder are connected by a screw that passes vertically through the fixing hole of the upper clamp and the through hole of the support plate. An elastic element is sleeved on the screw between the bottom of the upper clamp and the upper part of the support plate. The purpose of this arrangement is to fix the two ends of the plastic strip with the upper and lower clamps respectively, and to further tighten the elastic element so that it has a strong load and can generate a strong elastic force, thereby generating an upward force on the upper clamp and further straightening and tightening the plastic strip. During the process of adding casting material into the mold cylinder under vibration, the plastic strip is deformed by the compression of the material clump. However, since the upper and lower ends of the plastic strip are locked by the upper and lower clamps and cannot move, the upper clamp and the plastic strip will be continuously subjected to the elastic force released by the elastic element. Under this force, the plastic strip will be continuously vibrated and tightened, which can promote the flow of casting material and reduce its squeezing force on the plastic strip, thereby accelerating the return of the plastic strip to its original position and keeping it in a vertical and taut state. The resulting air passage achieves the vertical effect required by the design, thereby ensuring the air-permeable brick blowing effect, improving production efficiency and product quality.
[0017] The upper clamp A has symmetrical threaded holes on both sides. The threaded holes of the upper clamp A are matched in position and size with the arc-shaped holes of the upper clamp B. The upper clamp A and the upper clamp B are connected and fixed by wing screws that pass through the threaded holes and the arc-shaped holes. The purpose of this arrangement is that the upper clamp A can rotate and adjust its relative position with the upper clamp B within the arc length range of the arc-shaped hole. Rotating and fixing the upper clamp A causes the upper end of the plastic strip located between the upper clamp A and the upper clamp B to be squeezed and fixed. The use of wing screws is specifically designed for convenient hand-tightening operation. The wing-shaped design of the head increases the lateral force-bearing surface, making hand-tightening more efficient and facilitating the adjustment of the relative position between the upper clamp A and the upper clamp B, thereby improving production efficiency.
[0018] The beneficial effects of this invention are as follows: Improvements to the clamping and fixing methods ensure that both ends of the plastic strip are securely locked, preventing further loosening due to pressure from the castable material during casting. The addition of elastic elements between the plastic strip clamps keeps the strip taut at all times. Vibration of the plastic strip promotes the flow of the castable material, reducing the pressure on the strip and accelerating its return to its original position, thus maintaining a vertical orientation and improving the slit layout of the breathable brick. The air-permeable channels formed by the slits are vertically continuous from top to bottom and uniformly radially distributed, effectively improving product processing efficiency and quality. Attached Figure Description
[0019] Figure 1 This is a three-dimensional structural diagram of the elastic anti-loosening device for plastic strips of this utility model;
[0020] Figure 2 This is a front view structural diagram of the elastic anti-loosening device for plastic strips of this utility model;
[0021] Figure 3 This is a top view of structure B of the upper clamp of this utility model;
[0022] Figure 4 This is a top view of the second structure of the upper clamp B of this utility model.
[0023] The markings in the diagram are: 1. Upper clamp A; 2. Upper clamp B; 3. Lower clamp; 4. Screw; 5. Nut A; 6. Nut B; 7. Nut C; 8. Wing screw; 9. Elastic element; 10. Rivet; 11. Mold cylinder; 12. Support plate; 13. Slit; 14. Plastic strip; 15. Arc hole; 16. Fixing hole; 17. Mounting side plate. Detailed Implementation
[0024] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0025] like Figure 1-4 As shown, an elastic anti-loosening device for plastic strips used in the production of slits in breathable bricks includes an upper clamp and a lower clamp 3. The mold cylinder 11 is a hollow conical cylinder. The upper clamp is located above the mold cylinder 11, and the lower clamp 3 is located at the bottom of the mold cylinder 11. Support plates 12 are symmetrically fixed on the outer walls of the upper two sides of the mold cylinder 11. A through hole is opened at the center of the support plate 12. Fixing holes 16 are symmetrically provided on both sides of the upper clamp. The upper clamp and the mold cylinder 11 are connected by a screw 4 that passes vertically through the fixing hole 16 of the upper clamp and the through hole of the support plate 12. An elastic element 9 is sleeved on the screw 4 between the bottom of the upper clamp and the upper part of the support plate 12. The elastic element 9 is an elastic part that is not limited to a mold spring. The maximum load value of the elastic element 9 is 1000-1500N.
[0026] The upper clamp includes upper clamp A1 and upper clamp B2. Upper clamp A1 and upper clamp B2 are fitted together vertically. The centers of upper clamp A1, upper clamp B2, lower clamp 3 and mold cylinder 11 are on the same vertical line.
[0027] The upper clamp A1, upper clamp B2 and lower clamp 3 are all circular plate structures with slits 13 evenly distributed in the middle. The shape, size and position of the slits 13 on the upper clamp A1, upper clamp B2 and lower clamp 3 are all consistent.
[0028] The upper clamp B2 has symmetrically arranged arc-shaped holes 15 and fixing holes 16 on both sides. The arc-shaped holes 15 are located inside the fixing holes 16, and the fixing holes are through holes. Figure 3 As shown, the upper clamp B2 is a large disc-shaped plate structure, which can also be made as follows: Figure 4 The small disc-shaped plate structure shown has symmetrically integrated mounting side plates 17 on both sides, and the mounting side plates 17 have fixing holes 16.
[0029] The upper clamp A1 has symmetrical threaded holes on both sides. The threaded holes of the upper clamp A1 are matched with the arc-shaped hole 15 of the upper clamp B2 in terms of position and size. The upper clamp A1 and the upper clamp B2 are connected and fixed by wing screws 8 that pass through the threaded holes and the arc-shaped hole 15. The upper clamp A1 can rotate and adjust its relative position with the upper clamp B2 within the arc length range of the arc-shaped hole 15.
[0030] Nut A5 is provided on the screw 4 above the upper clamp B2, nut B6 is provided below the elastic element 9, and nut C7 is provided above the support plate 12. Nuts A5 and C7 limit and fix the vertical position of the upper clamp and the mold cylinder on the screw 4. Nut B6 is used to tighten and compress the elastic element 9 to adjust the elastic force of the elastic element 9 on the upper clamp and the plastic strip 14.
[0031] A plastic strip 14 is vertically inserted into the slits 13 of the lower clamp 3, upper clamp B2, and upper clamp A1, as well as into the mold cylinder 11. One end of the plastic strip 14 is fitted with a rivet 10 and fixed to the bottom of the lower clamp 3. The other end of the plastic strip 14 protrudes through the slit 13 of the upper clamp A1. The shape of the rivet is not limited, but steel nails or staples are preferred. The thickness of the plastic strip 14 is 0.1-0.3 mm, preferably PET film.
[0032] In use, select 0.1-0.3mm PET film and cut plastic strips 14 according to the slit specifications required by the design. The lower clamp 3 is fixed to the bottom of the mold cylinder 11. The screw 4 is vertically inserted between the upper clamp fixing hole 16 and the through hole of the support plate 12 to connect the upper clamp and the mold cylinder 11. Nuts A5 and C7 are used to limit and fix the vertical installation position of the upper clamp and the mold cylinder 11 on the screw 4. A rivet 10 is installed at one end of the plastic strip 14. The other end of the plastic strip 14 is passed through the lower clamp 3, the mold cylinder 11, and the upper clamp 14 in sequence. Within the slit between clamp A1 and clamp B2, the lower end of plastic strip 14 is fixed to clamp 3 by rivet 10. After tightening plastic strip 14, clamp A1 is rotated along the arc-shaped hole 15 of clamp B2. The slit between clamp A1 and clamp B2 is misaligned, causing plastic strip 14 between clamps A1 and B2 to be twisted and misaligned. Tightening the wing screw 8 makes clamps A1 and B2 fit tightly together, squeezing and fixing the upper end of plastic strip 14 between clamps A1 and B2. Thus, both the upper and lower ends of plastic strip 14 are fixed. An elastic element 9 is sleeved on the screw 4 between the bottom of the upper clamp and the upper part of the support plate 12. This elastic element 9, a mold spring, has a high elastic modulus. By adjusting nut B6 to tighten and compress the elastic element 9, the mold spring can be subjected to a strong load, generating a strong elastic force, thereby generating a continuous upward force on the upper clamp, further tightening plastic strip 14. During the process of feeding material into the mold cylinder 11 under vibration, the plastic strip 14 is deformed by the compression of the material clump. However, since the upper and lower ends are locked by the upper and lower clamps 3 and cannot move, the plastic strip 14 will be continuously subjected to the elastic force released by the elastic element 9. Under this force, the plastic strip 14 will be continuously vibrated and tightened, and the flow of the casting material can be promoted to reduce the extrusion force on the plastic strip 14, thereby accelerating the return of the plastic strip 14 to its original position and keeping it in a vertical and taut state.
[0033] After the slit permeable brick core solidifies, it is demolded. The drying temperature of the permeable brick core is preferably 100~300℃, and the firing temperature is preferably 500~1720℃. After drying at 200℃ for 48 hours and firing at 1580℃ for 60 hours, a permeable brick with vertically aligned and evenly distributed slits is obtained.
[0034] In addition to the above embodiments, this utility model may have other implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by this utility model.
Claims
1. A plastic strip elastic anti-loosening device for the production of narrow joints in breathable bricks, characterized in that: It includes an upper clamp and a lower clamp. The mold cylinder is a hollow conical cylinder. The upper clamp is located above the mold cylinder, and the lower clamp is located at the bottom of the mold cylinder. Support plates are symmetrically fixed on the outer walls of the upper two sides of the mold cylinder. A through hole is opened at the center of the support plate. Fixing holes are symmetrically provided on both sides of the upper clamp. The upper clamp and the mold cylinder are connected by a screw that passes vertically through the fixing hole of the upper clamp and the through hole of the support plate. An elastic element is sleeved on the screw between the bottom of the upper clamp and the upper part of the support plate.
2. The elastic anti-loosening device for plastic strips used in the production of narrow joints for breathable bricks according to claim 1, characterized in that: The upper clamp includes upper clamp A and upper clamp B. Upper clamp A and upper clamp B are fitted together vertically. The centers of upper clamp A, upper clamp B, lower clamp and mold cylinder are on the same vertical line.
3. The elastic anti-loosening device for plastic strips used in the production of narrow joints for breathable bricks according to claim 2, characterized in that: The upper clamp A, upper clamp B and lower clamp are all circular plate structures with slits evenly distributed in the middle. The shape, size and position of the slits on the upper clamp A, upper clamp B and lower clamp are all consistent.
4. The elastic anti-loosening device for plastic strips used in the production of narrow joints for breathable bricks according to claim 2, characterized in that: The upper clamp B has symmetrical arc-shaped holes and fixing holes on both sides. The arc-shaped holes are located inside the fixing holes, and the fixing holes are through holes.
5. The elastic anti-loosening device for plastic strips used in the production of narrow joints for breathable bricks according to claim 2, characterized in that: The upper clamp B has symmetrically integrated mounting side plates on both sides, and fixing holes are opened on the mounting side plates.
6. The elastic anti-loosening device for plastic strips used in the production of narrow joints for breathable bricks according to claim 2, characterized in that: The upper clamp A has symmetrical threaded holes on both sides. The threaded holes of the upper clamp A are matched with the arc-shaped holes of the upper clamp B in terms of position and size. The upper clamp A and the upper clamp B are connected and fixed by wing screws that pass through the threaded holes and the arc-shaped holes. The upper clamp A can rotate and adjust its relative position with the upper clamp B within the arc length range of the arc-shaped hole.
7. The elastic anti-loosening device for plastic strips used in the production of narrow joints for breathable bricks according to claim 1, characterized in that: Nut A is provided on the screw above the upper clamp B, nut B is provided below the elastic element, and nut C is provided above the support plate.
8. The elastic anti-loosening device for plastic strips used in the production of narrow joints for breathable bricks according to claim 3, characterized in that: A plastic strip is vertically inserted into the slits of the lower clamp, upper clamp B, and upper clamp A, as well as into the mold cylinder. One end of the plastic strip is fitted with a rivet and fixed to the bottom of the lower clamp, while the other end of the plastic strip passes through the slit of the upper clamp A.
9. The elastic anti-loosening device for plastic strips used in the production of slits in breathable bricks according to claim 8, characterized in that: The plastic strip is 0.1-0.3mm thick and is made of PET film.
10. The elastic anti-loosening device for plastic strips used in the production of narrow gaps in breathable bricks according to claim 1, characterized in that: The elastic element is not limited to the elastic part of the mold spring, and the maximum load value of the elastic element is 1000-1500N.