A socket-and-spigot assembled PVC plastic-steel window frame

Abstract

The present invention discloses a socket-and-spigot assembly type PVC plastic-steel window frame, wherein the window frame assembly comprises a PVC profile and a steel lining, and cavities are arranged on both sides of the steel lining cavity, and the cavities on both sides of the steel lining cavity at the first butt joint end are provided with first butt joint inclined surfaces, and the cavities on both sides of the steel lining cavity at the second butt joint end are provided with second butt joint inclined surfaces, and the end of the steel lining cavity at the first butt joint end protrudes from the first butt joint inclined surface to form a plug-in block, and the end face of the steel lining cavity at the second butt joint end is indented into the second butt joint inclined surface to form a plug-in slot adapted to the plug-in block; when the ends of the window frame assembly are butt jointed, the plug-in block is inserted into the plug-in slot, and the first butt joint inclined surface and the second butt joint inclined surface are butt jointed with each other, and the steel lining cavity at the first butt joint end and the steel lining cavity at the second butt joint end are fixedly connected by a connecting structure. The plastic-steel window frame of the present invention has the advantages of precise butt jointing, high connection strength, beautiful appearance and convenient disassembly and assembly, and has high practical value.

Description

Technical Field

[0001] The invention relates to the technical field of building doors and windows, and in particular to a socket-and-spigot assembled PVC plastic-steel window frame. Background Art

[0002] PVC plastic doors and windows are a product that the country focuses on promoting. Compared with traditional steel windows, wooden windows and aluminum alloy doors and windows, they have greatly improved in terms of heat insulation, sound insulation, anti-aging and sealing performance. With the improvement of people's living standards, the requirements for living environment are getting higher and higher. As an important part of the building, the performance requirements for doors and windows are also getting higher and higher. With the improvement of building energy-saving requirements, the proportion of plastic steel doors and windows in buildings is increasing. At present, the window frames of existing plastic steel doors and windows on the market are assembled by welding or screwing, but the welding method only connects the PVC profiles together, while the steel lining that plays a reinforcing role is disconnected, which causes the weld angles of plastic steel doors and windows to crack easily due to excessive external force, and after welding, the weld needs to be cleaned and painted, which is a cumbersome process, and the production efficiency is not high. In addition, affected by factors such as personnel operating skills and welding equipment accuracy, the welding process often produces large dimensional deviations, which affects the appearance and performance of the finished window. When the welded window frame is replaced, it needs to be disassembled as a whole, which is very inconvenient. Although the screw connection method can connect the PVC profile and the steel lining together, the screw connection method of the existing technology has a very low docking accuracy. The two 45-degree bevels at the corners of the window frame are screwed together, which not only has low connection strength but also is prone to misalignment at the joints, resulting in an uneven appearance of the window. At the same time, in the low temperature environment of winter, the joints are prone to shrinkage and seam pulling, affecting the overall strength and appearance of the plastic steel doors and windows. In addition, when the right-angle screw connection is used, all the cavities on the end faces of the window frame profile are exposed. If the seal is not tight, it will affect the drainage and thermal insulation performance of the window. On the other hand, rainwater will corrode the steel lining in the profile, affecting the service life of the window. A Chinese patent document with a publication date of July 28, 2010 and a publication number of CN 101787836A discloses a single sliding window frame welded into an integrated window frame profile, including a frame profile, a muntin frame profile, a small muntin profile, and a sealing strip. The frame profile and the muntin frame profile are provided with a profile facade, and the small muntin profile is welded on the profile facade; the frame profile and the muntin frame profile are provided with a basic slide, and the basic slide is connected to the slide heightening strip and the slide sealing strip in sequence; the sealing strip is provided with a sealing strip rubber strip and a wool strip opening; the rubber strip opening is connected to a screen cloth with a rubber strip, and the frame profile and the muntin frame profile may also be provided with a heat insulation curtain connecting groove. However, this type of window frame adopts a welding process, and the welding process often produces large dimensional deviations, which affects the appearance and performance of the finished window; and the welded window frame needs to be disassembled as a whole when replaced, which is very inconvenient. The welding process often produces large dimensional deviations, which affects the appearance and performance of the finished window, and the welded window frame needs to be disassembled as a whole when replaced, which is very inconvenient. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that in the existing plastic-steel window frames, two adjacent window frame components are fixed by welding or screwing, which has low connection strength, easy cracking and dislocation, etc., which affect the overall strength and appearance of plastic-steel doors and windows. A socket-and-spigot assembled PVC plastic-steel window frame is provided, which has the advantages of precise docking, high connection strength, beautiful appearance and easy disassembly and assembly.

[0004] The technical solution adopted by the present invention to solve the above technical problems is a socket-and-spigot assembled PVC plastic-steel window frame, which is formed by docking window frame components through docking ends. The window frame components include PVC profiles and steel linings. The cross section of the profile is an L-shaped multi-cavity structure. A glass placement groove is formed on the inner side of the corner of the profile. A rectangular steel lining cavity is provided in the middle of the cross section of the profile below the glass placement groove. The steel lining is a rectangular tube, which is adapted in the steel lining cavity. Both sides of the steel lining cavity are provided with cavities; the docking end includes a first docking end and a second docking end that are docked with each other, and the first docking end includes a first docking end and a second docking end that are docked with each other. The cavities on both sides of the steel lining cavity at one butt joint end are provided with first butt joint bevels, and the cavities on both sides of the steel lining cavity at the second butt joint end are provided with second butt joint bevels. The end of the steel lining cavity at the first butt joint end protrudes from the first butt joint bevel to form a plug-in block, and the end face of the steel lining cavity at the second butt joint end is indented into the second butt joint bevel to form a plug-in slot adapted to the plug-in block. When the ends of the window frame assembly are butt jointed, the plug-in block is inserted into the plug-in slot, the first butt joint bevel and the second butt joint bevel are butt jointed with each other, and the steel lining cavity at the first butt joint end and the steel lining cavity at the second butt joint end are fixedly connected by a connecting structure. The window frame assembly of the present invention includes a PVC profile and a steel lining arranged in the steel lining cavity of the profile for strengthening the structure, wherein the cavities on both sides of the steel lining cavity at the first butt joint end are provided with first butt joint bevels, and the cavities on both sides of the steel lining cavity at the second butt joint end are provided with second butt joint bevels. After butt jointing, the continuity of each cavity (usually a heat preservation cavity and a drainage cavity) can be ensured, and the performance of the window is guaranteed. The end of the steel lining cavity at the first butt joint end protrudes from the first butt joint inclined surface to form a plug-in block, and the end face of the steel lining cavity at the second butt joint end is indented into the second butt joint inclined surface to form a plug-in slot adapted to the plug-in block. The plug-in block and the plug-in slot cooperate to form a "mortise and tenon" structure. When the ends of the window frame assembly are butt jointed, the plug-in block is inserted into the plug-in slot and connected through the connection structure. In this way, by using a special milling device to perform special milling processing on the end face of the PVC profile, a 45-degree inclined surface is milled on both sides of the steel lining cavity of one profile, and the end of the steel lining cavity forms a protruding plug-in block. After the inclined surface of another profile is milled, the steel lining cavity is milled to make it concave to form a plug-in slot, thereby forming a "mortise and tenon" matching structure, so that the PVC profile can be seamlessly and accurately butted, and the overall aesthetics of the finished window is greatly improved. The problem of affecting the overall aesthetics of the finished window by cumbersome processes such as cleaning the weld and painting after the profile is welded is solved, and the use of processing equipment and accessories such as welding machines, cleaning machines, screw connectors, etc. is avoided, and the processing cost is greatly saved. Since the "mortise and tenon" structure of the present invention has a high matching accuracy, it also solves the problem of misalignment of joints after the profiles are connected due to the low design accuracy of the screw connection parts of the profiles.On the other hand, the profiles and steel linings at the joints of the window frame components of the present invention are connected as a whole to form a complete "steel skeleton" structure, thereby greatly improving the overall strength of the window, solving the problem of cracking of the weld corners due to the disconnection of the steel lining in the welding processing method, and solving the problem of cold shrinkage and seam pulling at the joints in the low temperature environment in winter due to the unreasonable design structure and insufficient tension of the screw joints. In this way, the present invention solves the problem that in the existing plastic-steel window frames, two adjacent window frame components are fixed by welding or screwing, which has low connection strength, easy cracking and dislocation, etc., which affect the overall strength and appearance of plastic-steel doors and windows, and has the advantages of precise docking, high connection strength, beautiful appearance and convenient disassembly and assembly.

[0005] Preferably, the connection structure includes a connection block arranged at the end of the steel lining at the second butt end, the connection block is adapted to the inner cavity of the steel lining, the steel lining cavity and the steel lining of the second butt end are both provided with fixing holes, the connection block is provided with fixing screw holes corresponding to the fixing holes, the connection block is connected and fixed to the steel lining cavity and the steel lining of the second butt end by fixing bolts; the plug-in block of the first butt end is provided with a connection hole passing through the steel lining cavity and the steel lining, the connection block is provided with connecting screw holes corresponding to the connecting holes, the connecting bolts pass through the steel lining cavity and the steel lining of the first butt end and are connected and fixed to the connection block, and the outer side wall of the steel lining cavity of the first butt end is tightly against the end face of the steel lining cavity of the second butt end. The present invention sets a connecting block in the inner cavity of the steel lining end of the second butt joint end, and fixes the connecting block to the steel lining cavity and the steel lining of the second butt joint end by fixing bolts, and the first butt joint end is provided with a connecting hole that penetrates the steel lining cavity and the steel lining, and is fixed to the connecting block by connecting bolts that penetrate the steel lining cavity and the steel lining of the first butt joint end. In this way, the present invention uses bolts to connect the profiles and profiles, and the steel linings and steel linings at the butt joint ends into one. In addition to ensuring the high-strength connection of the entire window, all the bolts are arranged in hidden locations such as the glass groove of the profile and the base wall of the profile. On the one hand, the aesthetics of the window surface is greatly improved, and on the other hand, it is ensured that the profile body will not be damaged when tightening the bolts.

[0006] Preferably, a sealing end cap is provided at the end of the steel liner cavity at the first butt joint end, and the sealing end cap includes a cover plate and a clamping ring integrally connected to one side of the cover plate, the clamping ring is adapted to the inner cavity of the steel liner, a raised clamping ring is provided on the outer periphery of the clamping ring, a sealing ring is provided on the outer periphery of the connection between the clamping ring and the cover plate, and the sealing end cap is a plastic part. The sealing end cap is used to close the port of the steel liner cavity, the clamping ring on the outer periphery of the clamping ring can play a fastening role, and the sealing ring ensures the sealing between the sealing end cap and the end face of the steel liner cavity, ensuring the aesthetics, fastening and sealing of the sealing end cap after installation. The use of plastic parts for the sealing end cap facilitates mass production and reduces costs.

[0007] Preferably, the cavity includes a first heat-insulating cavity arranged on one side of the steel lining cavity and a drainage cavity arranged on the opposite side of the steel lining cavity, a second heat-insulating cavity is arranged above the drainage cavity, and the inner side of the second heat-insulating cavity is closely attached to the glass placement groove. The heat-insulating cavity and the drainage cavity can ensure the heat-insulating performance and drainage performance of the finished window, so that the performance of the finished window is guaranteed.

[0008] Preferably, a partition plate is vertically arranged in the first insulation cavity, a bead groove is arranged on the upper cavity wall of the first insulation cavity, and a rubber strip groove is arranged on the upper inner cavity wall of the second insulation cavity; the profile base wall on the lower side of the first insulation cavity and the drainage cavity is provided with an installation groove, and the bead groove, rubber strip groove and installation groove are all T-shaped grooves. The partition plate is vertically arranged in the first insulation cavity to further improve the insulation performance and the structural strength; and the bead groove and rubber strip groove can meet the installation requirements of the window glass, and the installation groove can also be installed with an angle code to assist in fixing the corner of the window frame.

[0009] Preferably, the connection block is provided with a locking mechanism for locking the connection block with the steel liner, the locking mechanism includes top plates arranged on the left and right sides of the connection block, a top column is slidably provided in the connection block inside the top plate, the front end of the fixing bolt is transmission-connected with the top plate through the top column, and when the fixing bolt is screwed into the connection block, the top plate is lifted up and closely attached to the inner wall of the steel liner. Since the connection block is screwed to the steel liner cavity and the steel liner, and there is usually a gap between the connection block and the steel liner, when the connection bolt is screwed into the connection block, the force is concentrated on the fixing bolt, which causes uneven force on the steel liner and easily causes deformation of the end. In order to solve the above problems, the present invention arranges top plates on both sides of the connecting block, and the top plates are transmission connected to the front end of the fixing bolts through top columns slidingly arranged in the connecting block. When the fixing bolts are screwed into the connecting block, the top plates are lifted up through transmission so that they are tightly attached to the inner wall of the steel lining. In this way, when the connecting bolts are screwed into the connecting block, the force will not be concentrated on the fixing bolts, and the two sides of the steel lining can be evenly stressed, thereby avoiding deformation of the end of the steel lining. The transmission connection here can be direct transmission or indirect transmission through a transmission mechanism.

[0010] Preferably, grooves matching the top plate are provided on both sides of the connecting block, the top plate is embedded in the grooves, one end of the top column is connected to the center of the inner side surface of the top plate, the other end of the top column is provided with a spire, fixing bolts are provided on both sides of the spire, the front end of the fixing bolt is provided with a conical end, the center line of the top column and the center line of the fixing bolt are on the same plane, the cone apex angle of the conical end is complementary to the cone apex angle of the spire and the cone apex angle of the conical end is smaller than the cone apex angle of the spire, when the fixing bolt is screwed into the connecting block, the conical ends of the fixing bolts on the upper and lower sides of the steel liner cavity squeeze the spire and the top plate. This scheme utilizes the inclined plane principle and utilizes the force of the screwed-in fixing bolts to act on the top inclined plane, thereby lifting the top plate. In this way, the top plate can obtain a large thrust to ensure that the outer side of the top plate is in close contact with the inner wall of the steel lining, thereby applying the tension of the connecting bolts to the inner wall of the steel lining to avoid force concentration on the steel lining; the cone apex angle of the cone end is complementary to the cone apex angle of the pointed top because the top column is perpendicular to the fixing bolts, and the cone apex angle of the cone end is smaller than the cone apex angle of the pointed top, which can amplify the force and make the top plate close to the inner wall of the steel lining.

[0011] Preferably, the top plate and the top column are both circular, the top plate and the top column are an integrated structure, the outer side of the top plate is provided with anti-skid protrusions, the cone top angle of the pointed top is 110 degrees to 130 degrees, and the cone top angle of the cone end is 50 degrees to 70 degrees. The top plate and the top column are a circular integrated structure, which can be easily processed; the anti-skid protrusions on the outer side of the top plate can provide sufficient friction to ensure that the connection block is tightly connected to the inner wall of the steel lining.

[0012] Preferably, the inner wall of the steel lining cavity is provided with convex strips, the cross section of the convex strips is triangular, the convex height of the convex strips is 0.4-0.6 mm, and two convex strips are provided on each inner wall of the steel lining cavity. The convex strips are provided on the inner wall of the steel lining cavity, and the distance between the tops of the convex strips arranged opposite to each other in the steel lining cavity can be slightly smaller than the corresponding width of the steel lining, so that when the steel lining is installed, its outer wall can be close to the convex strips, and the steel lining can be installed while ensuring that there is no looseness between the steel lining and the steel lining cavity.

[0013] Preferably, the fixing bolts and the connecting bolts are all hexagon socket bolts, and nuts are sleeved on the rear ends of the fixing bolts and the connecting bolts. The hexagon socket bolts will not slip when being installed and removed, and the tools are simple and compact, which can be easily operated. When the doors and windows need to be replaced, the present invention only needs an hexagon socket wrench to disassemble them, which solves the inconvenience of the traditional welded plastic steel doors and windows that need to be disassembled as a whole. The nut sleeved on the rear end of the bolt can play a protective role and beautify the appearance.

[0014] The beneficial effects of the present invention are as follows: it effectively solves the problem that in the existing plastic-steel window frames, two adjacent window frame components are fixed by welding or screwing, which has low connection strength, easy cracking and dislocation, etc., which affects the overall strength and appearance of plastic-steel doors and windows. The socket-and-spigot assembled PVC plastic-steel window frame of the present invention has the advantages of precise docking, high connection strength, beautiful appearance and convenient disassembly and assembly, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional decomposition structure diagram of the butt joint end of the socket-and-spigot assembled PVC plastic-steel window frame of the present invention (the steel lining is not drawn);

[0016] Figure 2 This is a schematic diagram of a cross-sectional structure of the PVC profile of the present invention;

[0017] Figure 3 It is a schematic diagram of an end structure after a connecting block is installed at the second butt end of the window frame assembly of the present invention;

[0018] Figure 4 It is a schematic diagram of an end structure of the first butt joint end of the window frame assembly of the present invention (the steel lining is not drawn);

[0019] Figure 5 It is a structural schematic diagram of the steel lining of the present invention;

[0020] Figure 6 It is a schematic diagram of an end structure of the second butt joint end of the window frame assembly of the present invention (the steel lining is not drawn);

[0021] Figure 7 It is a structural schematic diagram of a connecting block of the present invention;

[0022] Figure 8 It is a structural schematic diagram of the sealing end cover of the present invention;

[0023] Fig. 9 It is a structural schematic diagram of the window frame assembly of the present invention after docking (without sealing end caps);

[0024] Fig.10 It is a structural schematic diagram of the window frame assembly of the present invention after being connected;

[0025] Fig.11 It is another structural schematic diagram of the connecting block of the present invention;

[0026] Fig.12 It is a cross-sectional view of another matching structure of the connecting block and the steel liner of the present invention.

[0027] In the figure: 1. profile, 2. glass placement groove, 3. steel lining cavity, 4. steel lining, 5. first docking end, 6. second docking end, 7. first docking bevel, 8. second docking bevel, 9. plug-in block, 10. plug-in groove, 11. connecting block, 12. fixing hole, 13. fixing screw hole, 14. fixing bolt, 15. connecting hole, 16. connecting screw hole, 17. connecting bolt, 18. sealing end cover, 19. cover plate, 20. clamping ring, 21. clamping ring, 22. sealing ring, 23. first insulation cavity, 24. drainage cavity, 25. second insulation cavity, 26. pressure strip groove, 27. rubber strip groove, 28. installation groove, 29. top plate, 30. top column, 31. groove, 32. spire, 33. cone end, 34. convex strip, 35. nut. DETAILED DESCRIPTION

[0028] The specific implementation of the technical solution of the present invention is further described below through examples and in combination with the accompanying drawings. It should be noted that in order to make the drawings clearer, the drawings of the present invention only show the docking parts of the window frame assembly rather than the overall structure.

[0029] Example 1

[0030] exist Figure 1 In the embodiment 1 shown, a socket-and-spigot assembled PVC plastic-steel window frame is formed by butting the window frame components together, and the window frame components include a PVC profile and a steel lining (see Figure 2 Figure 3 ), the cross section of the profile 1 is an L-shaped multi-cavity structure, a glass placement groove 2 is formed on the inner side of the corner of the profile, a rectangular steel lining cavity 3 is provided in the middle of the cross section of the profile below the glass placement groove, and the steel lining 4 is a rectangular tube (see Figure 5 ), adapted in the steel lining cavity, the inner wall of the steel lining cavity is provided with a convex strip 34, the cross section of the convex strip is triangular, the convex height of the convex strip is 0.5 mm, and two convex strips are provided on the inner wall of each side of the steel lining cavity. The steel lining cavity is provided with a cavity on both sides; the cavity includes a first insulation cavity 23 arranged on one side of the steel lining cavity and a drainage cavity 24 arranged on the opposite side of the steel lining cavity, a partition plate is vertically arranged in the first insulation cavity, and a layering groove 26 is arranged on the upper cavity wall of the first insulation cavity; a second insulation cavity 25 is arranged above the drainage cavity, and a rubber strip groove 27 is arranged on the upper inner cavity wall of the second insulation cavity, and the inner side of the second insulation cavity is close to the glass placement groove; the profile base wall on the lower side of the first insulation cavity and the drainage cavity is provided with an installation groove 28, and the layering groove, rubber strip groove and installation groove are all T-shaped grooves. The butt joint end of the window frame assembly includes a first butt joint end 5 and a second butt joint end 6 butted against each other. The cavities on both sides of the steel lining cavity of the first butt joint end are provided with first butt joint inclined surfaces 7 (see Figure 4 ), the second butt joint bevel 8 is provided at the cavity on both sides of the steel lining cavity of the second butt joint end (see Figure 6), the end of the steel lining cavity at the first butt joint end protrudes from the first butt joint bevel to form a plug-in block 9, and the end face of the steel lining cavity at the second butt joint end is retracted into the second butt joint bevel to form a plug-in groove 10 adapted to the plug-in block; when the ends of the window frame assembly are butt jointed, the plug-in block is inserted into the plug-in groove, the first butt joint bevel and the second butt joint bevel are butt jointed with each other, and the steel lining cavity at the first butt joint end and the steel lining cavity at the second butt joint end are fixedly connected by a connecting structure.

[0031] The connection structure of this embodiment includes a connection block 11 (see FIG. Figure 7 ), the connecting block is adapted to the inner cavity of the steel liner, the steel liner cavity and the steel liner at the second butt end are both provided with fixing holes 12, the connecting block is provided with fixing screw holes 13 corresponding to the fixing holes, the connecting block is connected and fixed to the steel liner cavity and the steel liner at the second butt end by fixing bolts 14; the plug-in block at the first butt end is provided with a connecting hole 15 penetrating the steel liner cavity and the steel liner, the connecting block is provided with connecting screw holes 16 corresponding to the connecting holes, the connecting bolts 17 pass through the steel liner cavity and the steel liner at the first butt end and are connected and fixed to the connecting block, and the outer wall of the steel liner cavity at the first butt end is tightly attached to the end face of the steel liner cavity at the second butt end. The fixing bolts and connecting bolts of this embodiment are all hexagon socket bolts, and nuts 35 are sleeved on the rear ends of the fixing bolts and connecting bolts.

[0032] The steel liner cavity end of the first butt joint end of this embodiment is provided with a sealing end cover 18 (see Figure 8 ), the sealing end cover includes a cover plate 19 and a clamping ring 20 integrally connected to one side of the cover plate, the clamping ring is adapted to the inner cavity of the steel liner, a raised clamping ring 21 is provided on the outer periphery of the clamping ring, and a sealing ring 22 is provided on the outer periphery of the connection between the clamping ring and the cover plate, and the sealing end cover is a plastic part.

[0033] The specific implementation process of this embodiment is as follows:

[0034] 1. First, use a specific milling equipment to mill the end of a profile with the left side as the axis, counterclockwise mill it 45° to form the first butt-jointed bevel, and protrude the steel liner cavity wall outward to form the first butt-jointed end plug-in block (see Figure 4 ). Similarly, the end of the other profile is milled 45° clockwise with the right side as the axis to form the second butt joint bevel, and the steel liner cavity wall is milled 45° counterclockwise to make the steel liner cavity wall concave inward and its end face perpendicular to the formed length direction to form the second butt joint end insertion groove (see Figure 6 ).

[0035] 2. Hot dip galvanized rectangular tube steel lining (see Figure 5) is placed in the steel lining cavity of the profile. The length of the steel lining is the same as that of the steel lining cavity and the two ends are aligned. Then, connection holes are processed at the glass placement groove wall of the first butt end of the profile and the corresponding position of the profile base wall; fixing holes are processed at the glass placement groove wall of the second butt end and the corresponding position of the profile base wall, and a connection block is placed in the steel lining cavity of the second butt end (see Figure 7 ) and fix the connection block with fixing bolts (see Figure 3 ).

[0036] 3. Assemble the first butt joint end and the second butt joint end of the window frame assembly by socket-jointing to form an integral window frame. After the assembly is completed, check whether the connection holes of each part are aligned and whether the connection points are aligned.

[0037] 4. Insert the hexagon socket connection bolt into the connection hole and screw it into the connection screw hole on the connection block, then use the hexagon socket wrench to tighten the steel liner cavity and the steel liner and the connection block, so that the profiles and steel liner at the first butt end and the second butt end are tightly connected as one (see Fig. 9 ).

[0038] 5. Put the nuts on the bolt heads of the connecting bolts and fixing bolts respectively. Put the sealing ring on the sealing end cover (see Figure 8 ), and then insert the sealing end cover's collar into the end of the steel liner (see Fig.10 ); At this point, the overall installation of the window frame is completed. Finally, apply sealing silicone to all joints for overall sealing to ensure the overall sealing performance of the window frame.

[0039] Example 2

[0040] exist Fig.11 Fig.12 In the illustrated embodiment 2, a locking mechanism for locking the connecting block and the steel liner is provided on the connecting block, and the locking mechanism includes a top plate 29 arranged on the left and right sides of the connecting block, and a top column 30 is slidably provided in the connecting block on the inner side of the top plate, and the front end of the fixing bolt is transmission-connected to the top plate through the top column. When the fixing bolt is screwed into the connecting block, the top plate is lifted up and tightly attached to the inner wall of the steel liner.

[0041] The connection block of this embodiment is provided with grooves 31 adapted to the top plate on both sides, the top plate is embedded in the grooves, one end of the top column is connected to the center of the inner side of the top plate, the other end of the top column is provided with a pinnacle 32, both sides of the pinnacle are provided with fixing bolts, the front end of the fixing bolt is provided with a cone end 33, the center line of the top column and the center line of the fixing bolt are in the same plane and perpendicular to each other, the cone vertex angle of the cone end is complementary to the cone vertex angle of the pinnacle and the cone vertex angle of the cone end is smaller than the cone vertex angle of the pinnacle; the top plate and the top column of this embodiment are both circular, the top plate and the top column are an integral structure, the outer side of the top plate is provided with anti-slip protrusions, the cone vertex angle of the pinnacle is 120 degrees, and the cone vertex angle of the cone end is 60 degrees. When the fixing bolts are screwed into the connection block, the cone ends of the fixing bolts on the upper and lower sides of the steel liner cavity squeeze the pinnacle and the top plate.

[0042] In this scheme, top plates are arranged on both sides of the connecting block, and the top plates are transmission-connected to the front ends of the fixing bolts through top columns slidingly arranged in the connecting block. When the fixing bolts are screwed into the connecting block, the top plates are lifted up by force transmission using the inclined plane principle, so that they are tightly attached to the inner wall of the steel lining. In this way, when the connecting bolts are screwed into the connecting block, the force will not be concentrated on the fixing bolts, and the force on both sides of the steel lining can be evenly distributed, thereby avoiding deformation of the ends of the steel lining.

[0043] The beneficial effects of the present invention are:

[0044] 1. The "mortise and tenon" splicing process principle is adopted, and the end faces of the PVC profiles are specially milled to achieve seamless and precise docking of the PVC profiles, which greatly improves the overall aesthetics of the finished window. It solves the problem of the overall aesthetics of the finished window being affected by the tedious processes of cleaning the welds and painting after the profiles are welded. It also solves the problem of the profiles' screw joints being misaligned due to low design accuracy, and other problems after the profiles are connected.

[0045] 2. The PVC profile and the built-in steel lining are connected as one, which greatly improves the overall strength of the window, solves the problem of cracking of weld corners caused by welding processing methods, and solves the problem of cold shrinkage and pulling of joints at the connection due to unreasonable design structure and insufficient tension of the screw joints in the low temperature environment in winter.

[0046] 3. After special milling of the end face of the PVC profile, the socket assembly connection is performed. After the connection, the continuity of the insulation cavity and the drainage cavity can be guaranteed, and the drainage performance and insulation performance of the window are guaranteed. After the overall connection is completed, it is only necessary to install the sealing end cover at the port of the steel lining cavity. The sealing end cover is installed at the base wall of the profile. The sealing end cover adopts a new structural design to ensure the aesthetics, tightness and sealing of the sealing end cover after installation.

[0047] 4. Through special milling processing on the end face of the PVC profile, the socket assembly connection is carried out, and then the PVC profile is connected with the hot-dip galvanized steel lining with fastening bolts. Finally, the joint is sealed with sealant, which optimizes the assembly and installation process of plastic steel doors and windows, improves the assembly and installation efficiency, and eliminates the use of processing equipment and accessories such as welding machines, corner cleaning machines, and screw joints, which greatly saves processing costs.

[0048] 5. By using hexagon socket bolts to connect profiles and steel linings as a whole, in addition to ensuring the high-strength connection of the entire window, all hexagon socket bolts are installed in hidden locations such as profile glass grooves and profile base walls. On the one hand, the aesthetics of the window surface is greatly improved, and on the other hand, it is ensured that the profile body is not damaged when the hexagon socket bolts are screwed. When the doors and windows need to be replaced, only an hexagon socket wrench is needed for disassembly, which solves the inconvenience of traditional welded plastic steel doors and windows that need to be disassembled as a whole.

[0049] In addition to the above-mentioned embodiments, within the scope disclosed in the claims and the specification of the present invention, the technical features or technical data of the present invention can be reselected and combined to form new embodiments, which can be achieved by those skilled in the art without creative work. Therefore, these embodiments that are not described in detail in the present invention should also be regarded as specific embodiments of the present invention and within the protection scope of the present invention.

Claims

1. A socket-and-spigot assembled PVC plastic-steel window frame, which is formed by connecting window frame components through butt ends, and the window frame components include PVC profiles and steel linings, characterized in that: The cross section of the profile (1) is an L-shaped multi-cavity structure, a glass placement groove (2) is formed on the inner side of the corner of the profile, a rectangular steel lining cavity (3) is provided in the middle of the cross section of the profile below the glass placement groove, the steel lining (4) is a rectangular tube, adapted in the steel lining cavity, and cavities are provided on both sides of the steel lining cavity; the butt joint end comprises a first butt joint end (5) and a second butt joint end (6) butt jointed with each other, the cavities on both sides of the steel lining cavity of the first butt joint end are provided with first butt joint inclined surfaces (7), the cavities on both sides of the steel lining cavity of the second butt joint end are provided with second butt joint inclined surfaces (8), the end of the steel lining cavity of the first butt joint end protrudes from the first butt joint inclined surface to form a plug-in block (9), and the end face of the steel lining cavity of the second butt joint end is indented into the second butt joint inclined surface to form a plug-in groove (10) adapted to the plug-in block; when the ends of the window frame components are butt jointed, the The plug-in block is inserted into the plug-in slot, the first docking bevel and the second docking bevel are docked with each other, and the steel lining cavity at the first docking end and the steel lining cavity at the second docking end are fixedly connected by a connecting structure; the connecting structure includes a connecting block (11) arranged at the end of the steel lining at the second docking end, and the connecting block is connected and fixed to the steel lining cavity and the steel lining at the second docking end by fixing bolts (14); a locking mechanism for locking the connecting block and the steel lining is provided on the connecting block; the locking mechanism includes a top plate (29) arranged on the left and right sides of the connecting block, and a top column (30) is slidably provided in the connecting block on the inner side of the top plate, and the front end of the fixing bolt is transmission-connected to the top plate through the top column. When the fixing bolt is screwed into the connecting block, the top plate is lifted up and tightly attached to the inner wall of the steel lining, and an anti-slip protrusion is provided on the outer side of the top plate.

2. The socket-and-spigot assembled PVC plastic-steel window frame according to claim 1, characterized in that: The connecting block is adapted to the inner cavity of the steel liner, the steel liner cavity and the steel liner at the second butt end are both provided with fixing holes (12), the connecting block is provided with fixing screw holes (13) corresponding to the fixing holes, the plug-in block at the first butt end is provided with connecting holes (15) penetrating the steel liner cavity and the steel liner, the connecting block is provided with connecting screw holes (16) corresponding to the connecting holes, the connecting bolts (17) pass through the steel liner cavity and the steel liner at the first butt end and are connected and fixed to the connecting block, and the outer wall of the steel liner cavity at the first butt end is tightly attached to the end face of the steel liner cavity at the second butt end.

3. The socket-and-spigot assembled PVC plastic-steel window frame according to claim 1, characterized in that: A sealing end cover (18) is provided at the end of the steel liner cavity at the first butt end. The sealing end cover comprises a cover plate (19) and a clamping ring (20) integrally connected to one side of the cover plate. The clamping ring is adapted to the inner cavity of the steel liner. A protruding clamping ring (21) is provided on the outer periphery of the clamping ring. A sealing ring (22) is provided on the outer periphery of the connection between the clamping ring and the cover plate. The sealing end cover is a plastic part.

4. The socket-and-spigot assembled PVC plastic-steel window frame according to claim 1, characterized in that: The mold cavity comprises a first heat-insulating mold cavity (23) arranged on one side of the steel lining cavity and a drainage mold cavity (24) arranged on the opposite side of the steel lining cavity. A second heat-insulating mold cavity (25) is arranged above the drainage mold cavity, and the inner side of the second heat-insulating mold cavity is closely attached to the glass placement groove.

5. The socket-and-spigot assembled PVC plastic-steel window frame according to claim 4, characterized in that: A partition plate is vertically arranged in the first thermal insulation cavity, a pressure strip groove (26) is arranged on the upper cavity wall of the first thermal insulation cavity, and a rubber strip groove (27) is arranged on the upper inner cavity wall of the second thermal insulation cavity; the profile base walls at the lower sides of the first thermal insulation cavity and the drainage cavity are both provided with mounting grooves (28), and the pressure strip grooves, rubber strip grooves and mounting grooves are all T-shaped grooves.

6. The socket-and-spigot assembled PVC plastic-steel window frame according to claim 1, characterized in that: The connection block is provided with grooves (31) adapted to the top plate on both sides, the top plate is embedded in the grooves, one end of the top column is connected to the center of the inner side of the top plate, the other end of the top column is provided with a spire (32), both sides of the spire are correspondingly provided with fixing bolts, the front end of the fixing bolt is provided with a cone end (33), the center line of the top column and the center line of the fixing bolt are on the same plane and perpendicular to each other, the cone apex angle of the cone end is complementary to the cone apex angle of the spire and the cone apex angle of the cone end is smaller than the cone apex angle of the spire, when the fixing bolt is screwed into the connection block, the cone ends of the fixing bolts on the upper and lower sides of the steel liner cavity squeeze the spire and the top plate.

7. The socket-and-spigot assembled PVC plastic-steel window frame according to claim 6, characterized in that: The top plate and the top column are both circular, and the top plate and the top column are an integral structure. The cone top angle of the pointed top is 110 degrees to 130 degrees, and the cone top angle of the cone end is 50 degrees to 70 degrees.

8. The socket-and-spigot assembled PVC plastic-steel window frame according to any one of claims 1 to 7, characterized in that: The inner wall of the steel lining cavity is provided with a convex strip (34), the cross section of the convex strip is triangular, the convex height of the convex strip is 0.4-0.6 mm, and two convex strips are provided on each inner wall of the steel lining cavity.

9. The socket-and-spigot assembled PVC plastic-steel window frame according to claim 1, characterized in that: The fixing bolts and the connecting bolts are all hexagon socket bolts, and nuts (35) are sleeved on the rear ends of the fixing bolts and the connecting bolts.

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