Inspection well mold formed through one-time pouring

Abstract

The utility model relates to an inspection well mould formed by one-time pouring, which comprises an outer mould formed by splicing one side of a whole round mould body or splicing more than two arc-shaped mould bodies, and a locking component is arranged at the splicing part; the base plate is detachably mounted at the bottom of the outer mold; the quick-release assembly is connected with the outer mold and the base plate and comprises a support, a shifting block and a first connecting piece, the support is fixed to the lower end of the side wall of the outer mold, the top is hinged to the shifting block, and the bottom is hinged to the first connecting piece; the lower end of the first connecting piece extends to the outer side of the base plate and is provided with a clamping hook, a clamping groove is formed in the upper end of the first connecting piece, and the shifting block abuts against the clamping groove to enable the clamping hook of the first connecting piece to lock the base plate. More than two supporting arms are arranged at the top of the inner mold, the free ends of the supporting arms are detachably positioned at the top of the outer mold, so that the inner mold is suspended and fixed in the outer mold, a forming cavity of the inspection well is formed between the inner mold and the outer mold, a through air hole is formed in the lower end of the inner mold, the inner mold is provided with a vertical rod sliding up and down, and the air hole is sealed at the bottom end of the vertical rod. And the forming efficiency and quality of products are improved.

Description

Technical Field

[0001] This utility model belongs to the field of inspection well technology, and in particular relates to an inspection well mold that can be cast in one piece. Background Technology

[0002] In urban infrastructure construction, a large number of precast concrete components are needed, the most common being inspection wells, also known as storm drains or sedimentation wells. Currently, most precast assembly structures are used, transferring on-site work from traditional construction methods to factory prefabrication using precast molds. This not only reduces work time and construction difficulty on the building site but also ensures construction safety and improves efficiency. However, most precast inspection wells are made using the most primitive ordinary molds, requiring secondary concrete pouring. This process is cumbersome, has a long production cycle, and necessitates repeated mold assembly, affecting assembly accuracy and resulting in loose joints and uneven surfaces, making it easy for the finished inspection wells to fail to meet quality standards. Utility Model Content

[0003] The purpose of this invention is to provide a one-time casting mold for manholes, which solves the problem that existing manhole prefabrication requires secondary casting, resulting in low production efficiency and poor product quality.

[0004] To achieve the above objectives, this utility model provides a one-time casting manhole mold. The outer mold is formed by splicing a single circular mold body on one side, or by splicing two or more arc-shaped mold bodies. A quick-opening and closing locking assembly is provided at the splice point. A base plate is detachably installed at the bottom of the outer mold. A quick-release assembly connects the outer mold and the base plate, including a bracket, a lever, and a first connecting piece. The bracket is fixed to the lower end of the side wall of the outer mold, its top is hinged to the lever, and its bottom is hinged to the first connecting piece. The first connecting piece... The lower end extends to the outside of the base plate and is provided with a hook. The upper end of the first connecting piece is provided with a slot. The push block abuts against the slot, so that the hook of the first connecting piece locks the base plate. The inner mold is provided with two or more support arms at the top. The free end of the support arm is detachably positioned at the top of the outer mold, so that the inner mold is suspended and fixed inside the outer mold. A forming cavity for inspection well is formed between the inner mold and the outer mold. The lower end of the inner mold is provided with a through vent hole. The inner mold is provided with a vertically sliding upright rod. The bottom end of the upright rod seals the vent hole.

[0005] Furthermore, the base plate includes a sealing plate and a circular frame extending vertically from the bottom surface of the sealing plate. The outer wall of the circular frame is provided with a plurality of radially extending mounting seats. The mounting seats include two parallel mounting plates and a connecting shaft connecting the two mounting plates. The hook of the first connecting piece engages with the connecting shaft.

[0006] Furthermore, a flange annular plate extending radially is provided at the bottom of the outer mold. The bottom end of the bracket fixes the flange annular plate, and the top surface of the mounting plate supports the flange annular plate.

[0007] Furthermore, a groove is further provided at the upper end of the first connecting piece, and the groove and the clamping groove are respectively provided on both sides of the upper end of the first connecting piece.

[0008] Furthermore, the locking assembly includes a fixed seat, a connecting seat, a cross bar, a limiting piece, a pushing block, a vertical rod and a first swing arm. The fixed seat is arranged on the first side plate of one of the arc-shaped mold bodies, and the connecting seat is arranged on the second side plate of the other arc-shaped mold body, including two horizontal plates arranged up and down. The vertical rod passes through the two horizontal plates and is rotatably connected thereto. The top end of the vertical rod is connected to the first swing arm, and the middle part is fixedly connected to the pushing block. The other end of the pushing block is away from the second side plate and is hinged to the limiting piece. The limiting piece is connected to the fixed seat through the cross bar, and a limiting groove is provided on one side of the limiting piece; the vertical rod is embedded in the limiting groove.

[0009] Furthermore, a fixed shaft is provided at one end of the support arm close to the outer mold, and a barb is rotatably connected to the side wall of the outer mold. The barb is clamped with the fixed shaft so that the inner mold is suspended and fixed in the outer mold. A lifting ring is provided at the top of the vertical rod protruding from the top end of the inner mold, and a limiting block is further provided on the outer periphery of the vertical rod.

[0010] Furthermore, a baffle extending radially is provided on the outer side wall of the outer mold. The baffle is hinged to a second connecting piece, and the other end of the second connecting piece is hinged to the barb. The barb is in a "冂" shape. When the barb clamps the fixed shaft tightly, the baffle abuts against the inner side of the barb.

[0011] Furthermore, a plurality of rib plates are provided at the bottom of the inner mold, and the side of the rib plate close to the vertical rod is an inclined guiding surface.

[0012] One or more of the above technical solutions in the one-time casting and forming inspection well mold provided by the embodiments of the present invention at least have the following technical effects:

[0013] The outer mold first achieves circumferential sealing by quickly closing the splice joint using a locking assembly. The base plate at the bottom of the outer mold is locked to the outer mold via a quick-release assembly, forming a cylindrical body with an open top. The locking connection between the base plate and the outer mold involves first rotating the first connecting piece, causing its hook to engage with the base plate for initial positioning. Then, the lever is rotated downwards until its free end abuts against the slot of the first connecting piece, fixing it in place and locking the hook to the base plate, thus securing the outer mold to the base plate. Next, the inner mold is hoisted, positioning the free end of the support arm at the top of the outer mold, suspending the inner mold within it. The upright is then lowered to seal the vent. At this point, a manhole forming cavity with a base is formed between the inner and outer molds. Concrete is then poured into the forming cavity to form the manhole in one step, resulting in a smooth surface without gaps, improving the forming efficiency and quality of the manhole.

[0014] During demolding, first, release the positioning of the support arm from the top of the outer mold, move the upright upward to disengage it from the vent, allowing outside air to enter the inner mold through the vent, and lift the inner mold to achieve rapid separation of the inner mold and the inspection well. Next, unlock the base plate and the outer mold, move the lever upward to separate the lever from the first connecting piece, and then rotate the first connecting piece to separate the hook from the base plate, thus unlocking the base plate from the outer mold. Then, open the outer mold through the locking assembly to achieve rapid demolding of the outer mold from the inspection well and separation from the base plate. Finally, lift out the formed inspection well, completing the production of one inspection well. Repeat the above process to continue the production and forming of the next inspection well.

[0015] Inspection wells can be cast in one go. The mold assembly and disassembly process is simple and efficient, allowing for quick assembly and demolding, reducing production time. The demolding process does not damage the surface of the inspection well, resulting in a smooth and seamless finished product, which greatly improves the molding efficiency and quality of inspection wells. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A perspective view of a manhole mold cast in one piece, provided for an embodiment of this utility model.

[0018] Figure 2 The diagram shows the structure of the quick-release assembly and base plate of the manhole mold that is cast in one piece, as provided in this embodiment of the utility model.

[0019] Figure 3This is a structural diagram of the first connecting piece of the quick-release assembly of the one-time casting manhole mold provided in this embodiment of the utility model.

[0020] Figure 4 A structural diagram of the base plate of the manhole mold that is cast in one piece, provided for an embodiment of this utility model.

[0021] Figure 5 Another perspective view of the manhole mold cast in one piece according to an embodiment of the present utility model.

[0022] Figure 6 The manhole mold provided in this embodiment of the utility model is a one-time casting mold. Figure 5 A magnified view of A in the middle.

[0023] Figure 7 The front view of the manhole mold cast in one piece according to an embodiment of the present invention.

[0024] Figure 8 This is a structural diagram of the inner mold of a manhole mold that is cast in one piece, as provided in an embodiment of the present invention.

[0025] Figure 9 A partial cross-sectional view of the inner mold of a manhole mold that is cast in one piece, provided as an embodiment of this utility model.

[0026] Figure 10 A cross-sectional view of the inner mold of a manhole mold that is cast in one piece, provided for an embodiment of this utility model.

[0027] Figure 11 This is a structural diagram of a second embodiment of the manhole mold that is cast in one piece, provided as an example of the present invention.

[0028] Figure 12 A cross-sectional view of a manhole mold and support ring formed by one-time casting, provided for an embodiment of this utility model.

[0029] Figure 13 This is a structural diagram of the second embodiment of the inner mold of the manhole mold that is cast in one piece, as provided in this utility model embodiment.

[0030] Figure 14 A cross-sectional view of the inner mold of a one-time cast manhole mold provided in this utility model embodiment.

[0031] Figure 15 A cross-sectional view of the inner mold of the manhole mold that is cast in one piece, provided as an embodiment of the present utility model.

[0032] Figure 16Another cross-sectional view of the inner mold of the manhole mold that is cast in one piece according to an embodiment of the present invention.

[0033] In the diagram, 100 is the outer mold, 110 is the arc-shaped mold body, 120 is the molding cavity, 121 is the support ring, 130 is the flange annular plate, 131 is the clearance groove, 140 is the first side plate, 150 is the second side plate, 160 is the barb, 170 is the baffle, 180 is the second connecting piece, 181 is the tie rod, and 190 is the annular boss.

[0034] 200. Base plate; 210. Sealing plate; 220. Circular frame; 221. Reinforcing rib; 230. Mounting base; 231. Mounting plate; 232. Connecting shaft; 233. Step; 240. Support base.

[0035] 300. Quick-release assembly; 310. Bracket; 311. Support plate; 320. Pull block; 330. First connecting piece; 331. Hook; 332. Slot; 333. Groove.

[0036] 400. Locking assembly; 410. Fixing base; 420. Connecting base; 421. Horizontal plate; 430. Crossbar; 440. Limiting piece; 441. Limiting groove; 450. Push block; 460. Vertical rod; 461. Second swing arm; 462. Connecting arm; 470. First swing arm; 480. Push rod.

[0037] 500. Inner mold; 510. Support arm; 511. Fixed shaft; 512. Gas channel; 520. Vent hole; 530. Upright pole; 531. Lifting ring; 532. Limiting block; 540. Rib plate; 541. Guide surface; 550. Limiting plate; 551. Through hole; 560. Retractable door; 561. Fourth connecting piece; 562. Horizontal plate; 563. Triangular plate.

[0038] 570. Suspension column; 571. Handle; 572. Third connecting piece; 573. Fixing component; 580. Limiting mechanism; 581. Arc-shaped frame; 582. Reinforcing rib; 583. Limiting component; 590. Base plate; 591. Clearance notch. Detailed Implementation

[0039] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0040] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0043] In one embodiment of the manhole mold cast in one piece according to this utility model, please refer to... Figures 1 to 16A one-time cast manhole mold includes an outer mold 100, which is formed by splicing one side of a single circular mold body, or by splicing two or more arc-shaped mold bodies 110. A quick-opening and closing locking assembly 400 is provided at the splice joint. A base plate 200 is detachably installed at the bottom of the outer mold 100. A quick-release assembly 300 connects the outer mold 100 and the base plate 200, including a bracket 310, a lever 320, and a first connecting piece 330. The bracket 310 is fixed to the lower end of the side wall of the outer mold 100, its top is hinged to the lever 320, and its bottom is hinged to the first connecting piece 330. The lower end of the first connecting piece 330 extends to the outside of the base plate 200 and is provided with a hook 331. The upper end of the first connecting piece 330 is provided with a groove 332. The lever 320 abuts against the groove 332, causing the hook 331 of the first connecting piece 330 to lock the base plate 200. The inner mold 500 has two or more support arms 510 at the top. The free ends of the support arms 510 are detachably positioned on the top of the outer mold 100, so that the inner mold 500 is suspended and fixed inside the outer mold 100. A forming cavity for inspection wells is formed between the inner mold 500 and the outer mold 100. The lower end of the inner mold 500 is provided with a through vent hole 520. The inner mold 500 is provided with a vertically sliding upright 530. The bottom end of the upright 530 seals the vent hole 520.

[0044] Specifically, the outer mold 100 first achieves circumferential sealing by quickly closing the splice joint through the locking assembly 400. The base plate 200 located at the bottom of the outer mold 100 is locked to the outer mold 100 through the quick-release assembly 300 to form a cylindrical body with an open top. The locking connection between the base plate 200 and the outer mold 100 is achieved by first rotating the first connecting piece 330 so that the hook 331 of the first connecting piece locks the base plate 200, achieving initial positioning of the first connecting piece 330 and the base plate 200. Then, the lever 320 is rotated downwards until the free end of the lever 320 abuts against the slot 332 of the first connecting piece to fix the first connecting piece 330, so that the hook 331 locks the base plate 200, thereby achieving locking and fixing of the outer mold 100 and the base plate 200. Then, the inner mold 500 is hoisted so that the free end of the support arm 510 is positioned on top of the outer mold 100, so that the inner mold 500 is suspended and fixed inside the outer mold 100. Then, the upright 530 is moved down to block the vent hole 520. At this time, a manhole forming cavity 120 with a base is formed between the inner mold 500 and the outer mold 100. Concrete is poured into the forming cavity 120 to form the manhole in one go. The product surface is flat and there are no gaps, which improves the forming efficiency and quality of the manhole.

[0045] During demolding, first, release the positioning of the support arm 510 from the top of the outer mold 100, move the upright 530 upward to disengage it from the vent 520, allowing outside air to enter the inner mold 500 through the vent, and lift the inner mold 500 to quickly separate it from the inspection well. Next, unlock the base plate 200 from the outer mold 100, move the lever 320 upward to separate the lever 320 from the first connecting piece 330, and then rotate the first connecting piece 330 to separate the hook 331 from the base plate 200, thus unlocking the base plate 200 from the outer mold 100. Then, open the outer mold 100 through the locking assembly 400 to quickly demold the outer mold 100 from the inspection well and separate it from the base plate 200. Finally, lift out the formed inspection well, completing the production of one inspection well. Repeat the above process to continue the production and forming of the next inspection well.

[0046] Inspection wells can be cast in one go. The mold assembly and disassembly process is simple and efficient, allowing for quick assembly and demolding, reducing production time. The demolding process does not damage the surface of the inspection well, resulting in a smooth and seamless finished product, which greatly improves the molding efficiency and quality of inspection wells.

[0047] The mold can be circular, elliptical, or rectangular. Preferably, the bracket 310 includes two parallel support plates 311, and the lever 320 and the first connecting piece 330 are hinged between the two support plates 311 via connectors. Specifically, the two support plates 311 allow the lever 320 and the first connecting piece 330 to rotate within a limited distance, enhancing horizontal constraint and thus improving the stability of the engagement between the lever 320 and the first connecting piece 330. The connectors can be locking bolts and nuts or pin-like structures. The locking bolts facilitate the disassembly and replacement of the lever 320 and the first connecting piece 330, preventing loosening of the fit due to friction over long-term use.

[0048] For further details, please refer to... Figure 4 The base plate 200 includes a sealing plate 210 and a circular frame 220 extending vertically from the bottom surface of the sealing plate 210. The outer wall of the circular frame 220 is provided with multiple radially extending mounting seats 230. Each mounting seat 230 includes two parallel mounting plates 231 and a connecting shaft 232 connecting the two mounting plates 231. The hook 331 of the first connecting piece engages with the connecting shaft 232. Specifically, the sealing plate 210 fits against the inner wall of the outer mold 100, sealing the bottom opening of the outer mold 100, and the mounting plate 231 supports the bottom of the outer mold 100. Rotating the first connecting piece 330 downwards causes the inner wall of the hook portion of the hook 331 to engage with the radial surface of the connecting shaft 232, forming a constraint to lock the base plate 200. The operation of locking or disengaging the hook 331 from the connecting shaft 232 is simple, safe, and efficient, saving assembly and disassembly time.

[0049] Further, please refer to Figure 4The diameter of the circular frame 220 is smaller than that of the sealing plate 210. Multiple reinforcing ribs are also provided within the circular frame. The top of the mounting plate 231 extends to the outer edge of the sealing plate 210, forming a step 233. The vertical height of the step 233 is greater than or equal to 1 mm. The circular frame 200 is also provided on a radially extending support base 240, located below the joint of the outer mold 100. Specifically, the reinforcing ribs 221 and the circular frame 220 enhance the load-bearing capacity of the base plate 200 and reduce the processing material of the base plate 200, saving costs. The step 233 structure of the mounting plate allows the sealing plate 210 to extend into the outer mold 100 to ensure sealing and prevent material leakage. Furthermore, when the arc-shaped mold body 110 of the outer mold is closed, the step 233 can position the outer mold 100, making the connection more accurate. Whether adjacent arc-shaped mold bodies 110 are closed or open, the mounting plate 231 provides support to prevent the outer mold 100 from separating and falling to the ground. When the adjacent arc-shaped mold 110 is fully opened, the support base 240 is still supported at the bottom of the opening of the adjacent arc-shaped mold 110 to prevent the adjacent arc-shaped mold 110 from being misaligned.

[0050] For further details, please refer to... Figure 1 The outer mold 100 has a radially extending flange annular plate 130 at its bottom. The flange annular plate 130 is fixed at the bottom of the bracket 310, and the flange annular plate 130 is supported on the top surface of the mounting plate 231. Specifically, the flange annular plate 130 increases the contact area between the outer mold 100 and the base plate 200 and the bracket 310, thereby improving the structural strength and connection strength of the outer mold 100 and the bracket 310.

[0051] Further, please refer to Figure 1 The flange annular plate 130 is also provided with a clearance groove 131. Specifically, the clearance groove 131 restricts the horizontal swing of the first connecting piece 330. Whether or not to add a clearance groove 131 to the flange annular plate 130 can be determined according to actual needs.

[0052] Furthermore, please refer to Figure 1 The outer mold 100 has multiple flange ring plates 130 and multiple vertical side plates. Specifically, this enhances the overall structural strength of the outer mold 100, avoids deformation caused by local stress concentration, and extends the service life of the outer mold 100.

[0053] For further details, please refer to... Figure 3The upper end of the first connecting piece 330 is also provided with a groove 333, and the groove 333 and the slot 332 are respectively located on both sides of the upper end of the first connecting piece 330. Specifically, when the quick-release assembly 300 is in the unlocked state, the hook 331 does not engage with the connecting shaft 232, and the first connecting piece 330 rotates inward to a horizontal state. At this time, the groove 333 is located above the slot 332, and the lever 320 continues to rotate downward to engage with the groove 333 to fix the first connecting piece 330. The flange annular plate 130 cooperates with the lever 320 to limit the first connecting piece 330 to prevent the first connecting piece 330 from loosening and rotating to re-hook the connecting shaft 232, which would affect the locking assembly 400 from opening the outer mold 100.

[0054] For further details, please refer to... Figures 5 to 7 The locking assembly 400 includes a fixed base 410, a connecting base 420, a horizontal bar 430, a limiting piece 440, a push block 450, a vertical bar 460, and a first swing arm 470. The fixed base 410 is disposed on the first side plate 140 of an arc-shaped mold body, and the connecting base 420 is disposed on the second side plate 150 of another arc-shaped mold body. It includes two horizontal plates 421 disposed vertically. The vertical bar 460 passes through the two horizontal plates 421 and is rotatably connected to them. The top end of the vertical bar 460 is connected to the first swing arm 470, and the middle part is fixedly connected to the push block 450. The other end of the push block 450 is away from the second side plate 150 and is hinged to the limiting piece 440. The limiting piece 440 is connected to the fixed base 410 through the horizontal bar 430. A limiting groove 441 is provided on one side of the limiting piece 440. The vertical bar 460 is embedded in the limiting groove 441.

[0055] Specifically, when the outer mold 100 is in the closed state, the vertical rod 460 is embedded in the limiting groove 441. The limiting groove 441 is used to restrict the vertical rod 460 and prevent the pressure exerted by the concrete pouring into the molding cavity 120 on the outer mold 100 from causing the vertical rod 460 to loosen and open the outer mold 100. The limiting groove 441 is preferably an arc-shaped groove. When the outer mold 100 is changed from the open state to the closed state, the arc-shaped design can guide the vertical rod 460 into the limiting groove 441. To change the outer mold 100 from a closed state to an open state, the first swing arm 470 needs to be rotated towards the fixed seat 410, causing the vertical rod 460 and the push block 450 to rotate together. The other end of the push block 450 makes a circular motion around the vertical rod 460, causing the limiting piece 440 to move towards the first side plate 140. The limiting piece 440 pushes the horizontal rod 430 and the fixed seat 410 to move synchronously together, thereby opening the outer mold 100 and completing the rapid demolding. This will not damage the outer surface of the inspection well and improve product quality.

[0056] Further, please refer to Figure 5 and Figure 7Multiple locking components 400 are provided on the first side plate 140 and the second side plate 150. Each locking component 400 shares a common vertical rod 460. The bottom of the vertical rod 460 extends out to a connecting seat 420 and connects to a second swing arm 461. The free ends of the first swing arm 470 and the second swing arm 461 are linked by a push rod 480. Specifically, the multiple locking components ensure the tightness of the outer mold 100 when closed. Because each locking component 400 shares the same vertical rod 460, rotating the push rod once causes all locking components to move synchronously, allowing the first side plate 140 and the second side plate 150 to open stably. The opening and closing operation of the outer mold 100 is simple and quick.

[0057] Furthermore, please refer to Figure 5 and Figure 7 Multiple connecting arms 462 are also connected between the vertical rod 460 and the push rod 480. Specifically, the overall rigidity of the vertical rod 460, push rod 480, first swing arm 470, and second swing arm 461 is enhanced, enabling them to withstand greater loads and resist deformation.

[0058] For further details, please refer to... Figure 11 The lower side of the outer wall of the outer mold 100 is also provided with a radially extending stepped annular boss 190. Specifically, the annular boss 190 makes the outer diameter of the base of the inspection well larger than the outer diameter of the well body, which is suitable for the manufacture of inspection wells of different shapes. The quick-release assembly 300 is provided on the side wall of the annular boss 190.

[0059] For further details, please refer to... Figure 12 A support ring 121 is provided between the inner wall of the outer mold 100 and the outer wall of the inner mold 500. Specifically, the support ring 121 is located above the bottom of the inner mold 500 and cooperates with the outer mold 100 and the inner mold 500 to form an upper well chamber or adjusting well forming cavity 120 that runs vertically through the upper well chamber, so that one mold can form inspection wells with different structures.

[0060] For further details, please refer to... Figure 5 , Figures 8 to 10The support arm 510 has a fixed shaft 511 at one end near the outer mold 100. The side wall of the outer mold 100 is rotatably connected to a barb 160, which engages with the fixed shaft 511 to suspend and fix the inner mold 500 inside the outer mold 100. The top of the upright extends out of the top of the inner mold 100 and is equipped with a lifting ring 531. The outer periphery of the upright 530 is also equipped with a limiting block 532. Specifically, the inner mold 500 is hoisted into the outer mold 100 through the lifting ring 531, the support arm 510 is supported on the top of the outer mold 100, and then the barb 160 is rotated to lock the fixed shaft 511, locking the inner mold 500 and suspending it inside the outer mold 100. At this time, after the inner mold 500 and the outer mold 100 are assembled, the upright 530 is released. Under its own weight, the upright 530 moves downward and closes the vent hole 520, so that the inner mold 500 is in a negative pressure state. After the concrete is poured and formed, the barb 160 is opened, and the lifting ring 531 is lifted, causing the upright 530 to detach from the vent hole 520. Air enters the inner mold 500 from the outside in, and the air pressure inside and outside the inner mold 500 is balanced. The limiting block 532 prevents the upright 530 from being lifted and detached from the inner mold 500. The inner ring 531 is then lifted upwards, allowing the inner mold 500 to be demolded smoothly. The demolding process does not damage the inner side of the inspection well, ensuring its smoothness and flatness. The locking and separating operations of the inner mold 500 and the outer mold 100 are simple and efficient, improving molding efficiency. The vent hole 520 is equipped with a sleeve extending upwards, with a conical hole at the top that connects to the vent hole 520. Specifically, the sleeve increases the contact area between the upright 530 and the vent hole, and the conical hole guides the upright 530 downwards into the vent hole 520, ensuring a tight seal between the two. The upright 530 can be a solid rod, a hollow rod, or a screw, etc.

[0061] Further, please refer to Figure 10 The top of the inner mold 500 is a conical structure. Specifically, the conical structure is stronger and has better compressive strength. When the lifting ring 531 is hoisted, the limiting block 532 of the upright abuts against the top of the conical shape, causing the entire inner mold 500 to move upward. Concrete can also be diverted to the forming cavity 120 to prevent concrete from accumulating and solidifying on the top surface, which would require time for cleaning.

[0062] Further, please refer to Figure 9 The support arm 510 extends from one end of the inner mold 500 to the inner wall of the inner mold 500, and has an internal gas channel 512 that connects the inner mold 500 to the outside. Specifically, the gas channel 512 draws air in from the outside, accelerating the demolding speed of the inner mold 500.

[0063] For further details, please refer to... Figure 5The outer wall of the outer mold 100 is provided with a radially extending baffle 170, which is hinged to a second connecting piece 180. The other end of the second connecting piece 180 is hinged to a barb 160, which is U-shaped. When the barb 160 is engaged with the fixed shaft 511, the baffle 170 abuts against the inner side of the barb 160. Specifically, the barb 160 is rotated upward to engage the fixed shaft 511, and then the barb 160 is pressed down to engage the fixed shaft 511. The inner side of the barb abuts against the baffle 170 to enhance the locking force, forming a locking and fixing structure. When the second connecting piece 180 is pushed outward, the barb 160 is moved upward and separated from the fixed shaft 511. At this time, the support arm 510 and the outer mold 100 are in an unlocked state.

[0064] Furthermore, a pull rod 181 is welded to the outer side of the second connecting piece 180. Specifically, by pushing and pulling the rod 181 forward and backward, the second connecting piece 180 is rotated, which in turn causes the barb 160 to lock and unlock, making it convenient for workers to operate and saving effort. The pull rod 181 is a metal rod.

[0065] For further details, please refer to... Figure 9 The bottom of the inner mold 500 is provided with multiple stiffening plates 540, and the side of the stiffening plate 540 closest to the upright 530 is an inclined guide surface 541. Specifically, the stiffening plate 540 enhances the structural strength of the bottom of the inner mold 500, making it less prone to deformation and bulging under stress, maintaining a flat state, thereby ensuring the flatness of the bottom surface inside the inspection well. The guide surface 541 guides the upright 530 to accurately enter the vent hole 520. The other side of the stiffening plate 540 away from the upright is welded to the side wall of the inner mold 500.

[0066] Further, please refer to Figure 9 The inner wall of the inner mold 500 is provided with a limiting plate 550 or multiple staggered limiting plates 550. The limiting plate 550 has a through hole 551 for the upright 181 to pass through, and the through hole 551 is coaxially arranged with the vent hole 520. Specifically, the through hole 551 restricts the upright 530 from swinging, preventing the upright 530 from shifting when moving up and down and affecting the sealing effect of the vent hole. Multiple vertically staggered limiting plates 550 enhance the radial limiting of the upright 530.

[0067] In another embodiment of the inner mold 500, please refer to Figures 14 to 16The support arm 510 has a fixed shaft 511 at one end near the outer mold 100. A barb 160 is rotatably connected to the side wall of the outer mold 100, engaging the fixed shaft 511 to suspend and fix the inner mold 500 within the outer mold 100. The inner mold 500 has a notch with a retraction door 560 at the notch. A suspension column 570, connected to the top of the inner mold 500, is located on the opposite side of the notch. A fourth connecting piece 561 is located on the inner side wall of the retraction door 560. The top of the suspension column 570 extends beyond the top of the inner mold 500 and is connected to a handle 571. A third connecting piece 572 is fixedly connected to the inner end of the suspension column 570. A fixing member 573 is hinged to the other end of the third connecting piece 572, and the fourth connecting piece 561 is hinged to the other end of the fixing member 573. Specifically, after the inspection well is formed in the mold, the inner mold 500 needs to be demolded first. The barb 160 is separated from the fixed shaft 511, unlocking the inner mold 500 from the outer mold 600. Next, turn handle 571 to rotate the suspension column 570, causing the third connecting piece 572 to rotate around the suspension column 570. This causes the end of the fixing piece 573 hinged to the third connecting piece 572 and the third connecting piece 580 to rotate in the same direction, while the other end of the fixing piece 573 away from the third connecting piece 572 rotates in the opposite direction, causing the fourth connecting piece 561 to rotate as well. This causes the retractable door 560 to move inward, applying pressure to the side wall of the inner mold 500 next to the retractable door 560 and causing it to contract inward. This creates a gap between the outer wall of the inner mold 500 and the inspection well, allowing the inner mold 500 to quickly separate from the inspection well. Then, lift the support arm 510 upward to complete the demolding of the inner mold 500. The operation is simple, demolding is quick, saving demolding time, and it does not damage the surface of the molded inspection well, improving the molding efficiency and quality of the inspection well. After turning handle 571 in the opposite direction, the inner mold 500 returns to its original shape and can be reused, saving costs.

[0068] For further details, please refer to... Figure 14 The suspension column 570 has multiple spaced third connecting pieces 572 in the axial direction, and the retractable door 560 has corresponding fourth connecting pieces 561. The third connecting pieces 572 and fourth connecting pieces 561, which are on the same horizontal plane, are hinged together by a fixing member 573. Specifically, by rotating the handle 571, the multiple fourth connecting pieces 561 are rotated simultaneously, increasing the pulling force on the retractable door 56 to move inward, accelerating the retraction speed of the inner mold 500, and improving the demolding efficiency.

[0069] For further details, please refer to... Figure 14 and Figure 15The fourth connecting piece 561 is also hinged to a horizontal plate 562. A triangular plate 563 extends inward from the side wall of the inner mold 500 beside the retractable door, fitting against the inner side wall. The free end of the triangular plate 563 connects to the free end of the horizontal plate 562 to form a reinforcing structure. Specifically, the reinforcing structure forms multi-point linkage, improving structural strength. When the fourth connecting piece 561 moves, it drives the horizontal plate 500 and the triangular plate 563 to move together, accelerating the retraction speed of the inner mold 500 and limiting the range of retraction to prevent excessive deformation of the inner mold 500 that is difficult to restore.

[0070] For further details, please refer to... Figures 14 to 16 The inner mold 500 has a limiting mechanism 580 at its bottom. The limiting mechanism 580 includes a D-shaped arc-shaped frame 581 and reinforcing ribs 582. The plane of the arc-shaped frame 581 faces the shrinkage door 560, forming a range of movement for the shrinkage door 560 to move inward. The reinforcing ribs 582 connect to the inside of the arc-shaped frame 581 and to the bottom of the inner mold 500. The bottom end of the side wall of the inner mold 500 has multiple inwardly extending base plates 590, with clearance notches 591 between them. The base plates 590 are positioned above the bottom of the inner mold 500. The outer wall of the arc-shaped frame 581 also has a limiting member 583 suspended above the bottom of the inner mold 500. Specifically, the reinforcing ribs 582 enhance the structural strength of the bottom of the inner mold 500 and the arc-shaped frame 581, preventing excessive deformation of the bottom when the inner mold 500 shrinks. The clearance notches 591 facilitate the shrinkage and compression of the side wall of the inner mold 500. The arc-shaped frame 581 and the limiting component 583 work together to limit the shrinkage range of the inner mold 500.

[0071] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A manhole mold cast in one piece, characterized in that, Comprising: An outer mold, which is formed by splicing one side of a whole circular mold body or by splicing two or more arc-shaped mold bodies, and a quick-opening and closing locking component is provided at the splicing position; A base plate, which is detachably installed at the bottom of the outer mold; A quick-release component, connecting the outer mold and the base plate, including a bracket, a dial block and a first connecting piece. The bracket is fixed at the lower end of the side wall of the outer mold, the top is hinged to the dial block, and the bottom is hinged to the first connecting piece; the lower end of the first connecting piece extends to the outside of the base plate and is provided with a hook, the upper end of the first connecting piece is provided with a clamping groove, and the dial block abuts against the clamping groove to lock the hook of the first connecting piece to the base plate; An inner mold, with two or more support arms provided at the top. The free ends of the support arms are detachably positioned at the top of the outer mold, so that the inner mold is suspended and fixed inside the outer mold. A forming cavity for a inspection well is formed between the inner mold and the outer mold. The lower end of the inner mold is provided with a through ventilation hole, and the inner mold is provided with a vertically sliding upright rod, and the bottom end of the upright rod seals the ventilation hole.

2. The manhole mold cast in one piece according to claim 1, characterized in that: The base plate includes a sealing plate and a circular frame vertically extending from the bottom surface of the sealing plate. A plurality of radially extending mounting seats are provided on the outer side wall of the circular frame. The mounting seat includes two parallel mounting plates and a connecting shaft connecting the two mounting plates; the hook of the first connecting piece is clamped to the connecting shaft.

3. The manhole mold cast in one piece according to claim 2, characterized in that: A radially extending flange annular plate is provided at the bottom of the outer mold, the bottom end of the bracket is fixed to the flange annular plate, and the top surface of the mounting plate supports the flange annular plate.

4. The manhole mold cast in one piece according to claim 3, characterized in that: The upper end of the first connecting piece is further provided with a groove, and the groove and the clamping groove are respectively provided on both sides of the upper end of the first connecting piece.

5. The manhole mold cast in one piece according to claim 1, characterized in that: The locking component includes a fixed seat, a connecting seat, a cross bar, a limiting piece, a pushing block, a vertical rod and a first swing arm. The fixed seat is provided on the first side plate of one of the arc-shaped mold bodies, and the connecting seat is provided on the second side plate of the other arc-shaped mold body, including two horizontal plates arranged up and down. The vertical rod passes through the two horizontal plates and is rotatably connected to them. The top end of the vertical rod is connected to the first swing arm, and the middle part is fixedly connected to the pushing block. The other end of the pushing block is far away from the second side plate and is hinged to the limiting piece. The limiting piece is connected to the fixed seat through the cross bar, and a limiting groove is provided on one side of the limiting piece; the vertical rod is embedded in the limiting groove.

6. The manhole mold cast in one piece according to claim 1, characterized in that: A radially extending stepped annular boss is further provided on the lower side of the outer side wall of the outer mold.

7. The manhole mold cast in one piece according to claim 1, characterized in that: A support ring is further provided between the inner side wall of the outer mold and the outer side wall of the inner mold.

8. The manhole mold cast in one piece according to any one of claims 1 to 7, characterized in that: A fixed shaft is provided at one end of the support arm close to the outer mold, and a barb is rotatably connected to the side wall of the outer mold. The barb is clamped to the fixed shaft to suspend and fix the inner mold inside the outer mold. The top of the upright rod extends out of the top end of the inner mold and is provided with a lifting ring, and a limiting block is further provided on the outer periphery of the upright rod.

9. The manhole mold cast in one piece according to claim 8, characterized in that: A radially extending baffle is provided on the outer side wall of the outer mold. The baffle is hinged to a second connecting piece, and the other end of the second connecting piece is hinged to the barb. The barb is in an "冂” shape. When the barb clamps the fixed shaft, the baffle abuts against the inner side of the barb.

10. The manhole mold cast in one piece according to claim 8, characterized in that: A plurality of rib plates are provided at the bottom of the inner mold, and the side close to the upright rod is an inclined guiding surface.

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