Adjustable top die of tunnel lining trolley

Abstract

The invention provides an adjustable top formwork of a tunnel lining trolley, and relates to the field of tunnel construction. The adjustable top mold of the tunnel lining trolley comprises a truss mechanism, the top end of the truss mechanism is provided with a top mold body formed by hinging a plurality of top mold plates, the two ends of each top mold plate are both in an arc shape, notches which are arranged in a staggered mode are formed in the two ends of each top mold plate, and a protrusion is formed between every two adjacent notches. The protrusions are connected with the notches clamped to the adjacent top formworks in a clamped mode, through holes are formed in the middles of the protrusions, hinge shafts are connected to the middles of the through holes in a sleeved mode, and the upper half portions of the notches wrap and are clamped to the upper half portions of the inner protrusions. According to the adjustable top mold of the tunnel lining trolley, the top mold plates which are hinged to each other are arranged, the hinged positions located on the outer sides are limited to be in a connected state all the time, bending at different angles can be conducted according to the arc length and the curvature of a tunnel arc top, and therefore a lower mold plate in the top mold plate can be formed; and the manufacturing procedures of the top template are reduced, and the top template can be repeatedly used.

Description

Technical Field

[0001] The invention relates to the field of tunnel construction, in particular to an adjustable top formwork for a tunnel lining trolley. Background Art

[0002] In the process of highway and railway construction, it is often necessary to excavate tunnels in mountainous areas. In the process of tunnel formation, the cutter head is first used to cut the tunnel hole, and then the initial support structure is formed on the wall of the tunnel hole by using the spray anchor support system, and then the secondary lining is carried out on the initial support. The lining trolley is a construction equipment used for pouring secondary lining concrete for underground projects such as tunnels and diversion tunnels.

[0003] The existing patent CN217176647U tunnel lining trolley top mold split structure device includes: a top mold, a connecting seat is fixedly installed on the inner side of the top mold near the upper end surface, and a fixed seat is fixedly installed on the inner side near the lower end surface, a connecting slider is slidably installed on the connecting seat, and the connecting slider is fixedly connected to a connecting column slidably installed in the first slide groove through the connecting through groove.

[0004] This technical solution can realize the rapid and effective fixation of the top mold by pushing the connecting slider to drive the connecting column to extend and connect with the second slide groove. When it needs to be disassembled or replaced after use, the limit block is pulled up by the pull ring, and then the connecting slider is moved to drive the connecting column to cancel the cooperation with the second slide groove, that is, the disassembly is completed, and part of the top mold can be replaced, which is convenient for use. The raised strips and grooves can ensure the sealing. The three groups of connecting columns can improve the firmness of the connection. The pull ring can easily lift the limit block to realize the rapid disassembly between the top molds. However, due to the restriction of the tunnel shape, the top mold should be arc-shaped after splicing, and the diameter of different tunnels is different according to the design, and the corresponding arc length is also different. Therefore, this technical solution can only reduce the replacement of the length part of the top mold, but cannot adapt to the construction of tunnels with different arc lengths. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an adjustable top formwork for a tunnel lining trolley, which solves the problems raised in the above background technology.

[0006] To achieve the above purpose, the present invention is implemented through the following technical solutions: an adjustable top formwork for a tunnel lining trolley, comprising a truss mechanism, wherein a top formwork formed by a plurality of top formworks being hinged to each other is arranged at the top of the truss mechanism, both ends of the top formworks are arc-shaped, staggered notches are provided at both ends of the top formworks, a bulge is formed between two adjacent notches, the bulges are clamped with the notches clamped in the adjacent top formworks, a through hole concentric with the arcs at both ends of the top formworks is provided in the middle of the bulges, a hinge shaft is sleeved in the middle of the through hole, the upper half of the notch is wrapped and clamped in the upper half of the internal bulge, and the bottom end of the notch is provided with a convex hole for accommodating the top formworks. The templates are empty grooves close to each other, and a threaded hole is provided on the inner side of the top template. The internal thread of the threaded hole is connected to a threaded support part, and the end of the threaded sleeve away from the top template is hinged with a hinge seat, and the hinge seat is fixedly connected to the truss mechanism. A threaded groove is provided in the middle of the side wall of the top template, and side panels with the same shape as the top template formed by splicing multiple top templates are arranged on both sides of the top template. The side panels and the threaded grooves are threadedly connected by threaded columns, and plug-in grooves are provided on the outer sides of the top templates and the outer sides of the side panels on both sides. Plug-in blocks are plugged into the inside of the plug-in grooves, and the plug-in blocks on the same side are fixedly connected through side panels, and the side panels are perpendicular to the top template.

[0007] Preferably, connecting extensions are provided on both sides of the top template, and the connecting extensions of the symmetrical top templates are in contact with each other. One end of the hinge shaft is a boss, and the other end is threadedly connected with a positioning nut. The boss and the positioning nut are both located below the connecting extension, and the threaded grooves of the symmetrical top templates are threadedly connected through a threaded telescopic part.

[0008] Preferably, the threaded column is a double-ended threaded column, one end of which is threadedly connected in the thread groove, and the other end passes through the side plate and is threadedly connected to a locking nut. A rotating table is provided between the threaded column and the top template.

[0009] Preferably, a sealing groove is formed on the connection extension on one side of the top template, and a sealing block is fixedly installed on the connection extension on the other side of the top template, and the sealing block is inserted into the interior of the sealing groove.

[0010] Preferably, the truss mechanism comprises a supporting truss for supporting a fixed shape of the top template, and a connecting truss for connecting to an existing trolley hydraulic jacking mechanism is fixedly mounted at the bottom end of the supporting truss.

[0011] Preferably, the threaded support portion consists of three parts: an articulated block hinged to the articulated seat at the bottom end, a stud in the middle for adjusting the length, and a threaded sleeve threadedly connected to the outer surface of the stud, the stud is fixedly connected to the articulated block, and a threaded block threadedly connected to the threaded hole at the top end, the threaded block and the threaded sleeve are rotatably connected via a rotating limit rod, and the rotating limit rod is threadedly connected to the threaded sleeve.

[0012] Preferably, the threaded telescopic portion comprises a screw rod, a fixing portion is fixedly mounted in the middle of the screw rod, and both ends of the screw rod are threadedly connected with threaded inner and outer sleeves for threaded connection with the thread groove.

[0013] Preferably, an annular protrusion is provided on the outer side of the side plate, and the inner circle radius of the annular protrusion is the same as the distance from the center to the center point of the outer side of the top template.

[0014] Preferably, after a plurality of the top mold plates are spliced ​​into a top mold, a plastic film is laid on the inner circle of the top mold plate, and foam glue is filled in the gaps between the plastic films in the top mold plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This type of adjustable top formwork for tunnel lining trolley, by setting mutually hinged top formworks and limiting the hinges located on the outside to always be in a connected state, can be bent at different angles according to the arc length and curvature of the tunnel arc top, so as to form a lower formwork in the top formwork, reduce the production process of the top formwork and make it reusable.

[0017] 2. This type of tunnel lining trolley adjustable top formwork has connecting extensions on both sides of the top formwork, and the connecting extensions of the symmetrical top formworks fit each other. One end of the hinged shaft is a boss, and the other end is threadedly connected with a positioning nut. The boss and the positioning nut are both located below the connecting extension. The threaded grooves of the symmetrical top formworks are threadedly connected through the threaded telescopic parts. Through such an arrangement, the top formwork can be divided into multiple short-length units, which can be convenient for storage and transportation.

[0018] 3. The adjustable top formwork of the tunnel lining trolley has a threaded telescopic portion including a screw rod, a fixed portion is fixedly installed in the middle of the screw rod, and both ends of the screw rod are threadedly connected with threaded inner and outer sleeves for threaded connection with the thread groove. By limiting the fixed portion, the threaded inner and outer sleeves can be rotated and threadedly connected to the corresponding thread groove by rotating the threaded inner and outer sleeves, thereby completing the connection of the symmetrical top formwork.

[0019] 4. This type of tunnel lining trolley adjustable top formwork, after multiple top formworks are spliced ​​into a top formwork, a plastic film is laid on the inner circle of the top formwork, and foam glue is filled in the gaps between the plastic films. By setting the plastic film and connecting the top formwork with the threaded support part, the plastic film is pierced and fixed by the threaded block, and then the hinged gap of the top formwork is filled by spraying foam glue. After the foam glue is cured, it adheres to the plastic film to form a leak-proof layer. After use, the top formwork and the foam glue can be separated by mechanical friction. The foam glue and the plastic film can form two leak-proof layers, thereby preventing cement slurry from leaking from the gap. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 This is a schematic diagram of the top template connection of the present invention;

[0022] Figure 3 It is a half-section schematic diagram of the threaded support portion of the present invention;

[0023] Figure 4 It is a schematic diagram of the end of the top template of the present invention;

[0024] Figure 5 This is a schematic diagram of the side plate connection of the present invention;

[0025] Figure 6 This is a schematic diagram of the threaded column connection of the present invention;

[0026] Figure 7 It is a schematic diagram of the truss mechanism of the present invention;

[0027] Figure 8 This is a schematic diagram of plastic film connection of the present invention;

[0028] Fig. 9 It is a schematic diagram of the side panel connection of the present invention.

[0029] In the figure: 1, top template; 2, truss mechanism; 101, notch; 102, protrusion; 103, through hole; 104, hinge axis; 105, threaded hole; 6, threaded support part; 106, hinge seat; 107, threaded groove; 108, side plate; 3, threaded column; 109, plug-in groove; 110, plug-in block; 111, side plate; 4, connection extension; 112, positioning nut; 5, threaded telescopic part; 301, locking nut; 302, rotating table; 401, sealing groove; 402, sealing block; 201, supporting truss; 202, connecting truss; 601, hinge block; 602, threaded sleeve; 603, threaded block; 604, rotation limit rod; 605, stud; 501, screw; 502, fixing part; 503, threaded inner and outer sleeve; 7, annular protrusion; 8, plastic film. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] like Figure 1-9As shown, an adjustable top formwork for a tunnel lining trolley comprises a truss mechanism 2, at the top of which is provided a top formwork formed by a plurality of top formworks 1 hinged to each other. When the width of the top formworks 1 is large, the shape after casting is approximately polygonal. Therefore, the width of the top formworks 1 is reduced and the number of the top formworks 1 is increased, so that the formed surface after casting can be more approximately arc-shaped. Both ends of the top template 1 are arc-shaped, and the shape of the top template 1 is a flat key shape, with the middle of the arcs at both ends vertical, and the two ends of the top template 1 are provided with staggered notches 101, and a protrusion 102 is formed between two adjacent notches 101, and the protrusion 102 is clamped with the notch 101 clamped on the adjacent top template 1, and a through hole 103 concentric with the arcs at both ends of the top template 1 is provided in the middle of the protrusion 102, and a hinge shaft 104 is sleeved in the middle of the through hole 103. Through such an arrangement, adjacent top templates 1 can rotate relative to each other, and the upper half of the notch 101 is wrapped and clamped on the upper half of the internal protrusion 102, and the bottom end part of the notch 101 is provided with an empty groove to accommodate the top templates 1 approaching each other. Since adjacent top templates 1 will rotate during the bending process, the outer circle part does not require additional space due to the same distance to the center of the circle, while the inner circle part has a larger distance to the center of the circle, and an empty groove needs to be reserved during the rotation process to avoid interference between adjacent top templates 1 during rotation, and the inner side of the top template 1 is opened There is a threaded hole 105, the internal thread of the threaded hole 105 is connected with a threaded support part 6, the end of the threaded sleeve 602 away from the top template 1 is hinged with a hinge seat 106, the hinge seat 106 is fixedly connected to the truss mechanism 2, and multiple top templates 1 are respectively connected to the truss mechanism 2 through the threaded sleeve 602 and the hinge seat 106, so that the device can be spliced ​​into a whole, and then the device can be ensured to move as a whole. A threaded groove 107 is provided in the middle of the side wall of the top template 1, and side plates 108 with the same shape as the top template formed by splicing multiple top templates 1 are provided on both sides of the top template 1. The side plates 108 and the threaded groove 107 are threadedly connected through threaded columns 3. Insertion grooves 109 are provided on the outer side of the top templates 1 on both sides and the outer side of the side plates 108. Insertion blocks 110 are inserted into the inside of the insertion grooves 109, and the insertion blocks 110 on the same side are fixedly connected through side plates 111, and the side plates 111 are perpendicular to the top template 1. A casting space can be formed by such an arrangement.

[0032] By setting up mutually hinged top templates 1 and limiting the hinges located on the outside to always be in a connected state, different angles of bending can be performed according to the arc length and curvature of the tunnel arc top, thereby forming a lower template in the top template, reducing the production process of the top template 1 and ensuring that there is no leakage of slurry.

[0033] Connecting extensions 4 are provided on both sides of the top template 1. The connecting extensions 4 of the symmetrical top templates 1 fit together. One end of the hinge shaft 104 is a boss, and the other end is threadedly connected with a positioning nut 112. The boss and the positioning nut 112 are both located below the connecting extension 4. The threaded grooves 107 of the symmetrical top templates 1 are threadedly connected through the threaded telescopic part 5. Through such an arrangement, the top template 1 can be divided into multiple short-length units, which can be convenient for storage and transportation, and at the same time, installation space can be reserved for the intermediate connecting part components.

[0034] The threaded column 3 is a double-headed threaded column, one end of which is threadedly connected in the thread groove 107, and the other end passes through the side plate 108 and is threadedly connected to a locking nut 301. The threaded column 3 is located between the side plate 108 and the top template 1 and a rotating table 302 is provided. This arrangement can facilitate the connection between the side plate 108 and the top template 1. The rotating table 302 can ensure that the side plate 108 and the top template 1 are directly connected, thereby preventing the side plate 108 from being squeezed and deformed by cement during the cement pouring process, thereby preventing the template from running.

[0035] A sealing groove 401 is formed on the connection extension 4 on one side of the top template 1, and a sealing block 402 is fixedly installed on the connection extension 4 on the other side of the top template 1. The sealing block 402 is inserted into the sealing groove 401. This arrangement can avoid gaps in the symmetrical top template 1 during the splicing process.

[0036] The truss mechanism 2 includes a supporting truss 201 for supporting a fixed shape of the top template 1, and a connecting truss 202 for connecting to the existing trolley hydraulic jacking mechanism is fixedly installed at the bottom end of the supporting truss 201. The truss mechanism 2 is connected by a steel structure, wherein the supporting truss 201 and the connecting truss 202 are connected by bolts. The supporting truss 201 is adaptively adjusted according to the size of the tunnel. During the installation process, the supporting truss 201 can slide laterally relative to the connecting truss 202, and then be fastened and connected by bolts after sliding into place.

[0037] The threaded support part 6 is composed of three parts: an articulated block 601 articulated with the articulated seat 106 at the bottom, a stud 605 for adjusting the length in the middle, and a threaded sleeve 602 threadedly connected to the outer surface of the stud 605, the stud 605 is fixedly connected to the articulated block 601, a threaded block 603 threadedly connected to the threaded hole 105 at the top, the threaded block 603 and the threaded sleeve 602 are rotatably connected by a rotating limit rod 604, and the rotating limit rod 604 is threadedly connected to the threaded sleeve 602. Through such a setting, the length and inclination angle of the threaded support part 6 can be adjusted, so as to adapt to the shape of the bending top template 1 with different curvatures. This allows the top template 1 to be connected to the truss mechanism 2.

[0038] The threaded telescopic portion 5 includes a screw rod 501, a fixing portion 502 is fixedly installed in the middle of the screw rod 501, and both ends of the screw rod 501 are threadedly connected with a threaded inner and outer sleeve 503 for threaded connection with the thread groove 107. By limiting the fixing portion 502 and rotating the threaded inner and outer sleeve 503, the threaded inner and outer sleeve 503 can be rotated and threadedly connected to the corresponding thread groove 107, thereby completing the connection of the symmetrical top template 1.

[0039] An annular protrusion 7 is provided on the outer side of the side plate 108, and the inner circle radius of the annular protrusion 7 is the same as the distance between the center of the outer side of the top template 1. By providing the annular protrusion 7, it can be larger than the top template 1 for support during the assembly process of the top template 1.

[0040] After multiple top molds 1 are spliced ​​into a top mold, a plastic film 8 is laid on the inner circle of the top mold 1, and foam glue is filled in the gaps between the plastic films 8 of the top mold 1. When the plastic film 8 is set and the top mold 1 is connected to the threaded support part 6, the threaded block 603 is used to pierce the plastic film 8 and fix the plastic film 8, and then the hinged gap of the top mold 1 is filled with foam glue by spraying. After the foam glue is cured, it adheres to the plastic film 8 to form a leak-proof layer. After use, the top mold 1 can be separated from the foam glue by mechanical friction. The foam glue and plastic film 8 can form two leak-proof layers, thereby preventing cement slurry from leaking from the gap.

[0041] When in use, determine the size of the tunnel and make the side plates 108 according to the size of the tunnel, determine the number of hinged top templates 1 required according to the arc length of the tunnel top in the tunnel size, so that the top templates 1 are installed or reduced on both sides and ensure that the two top templates 1 with the plug-in slots 109 are located on the outermost two sides, and similarly make two groups of identical top templates 1, and connect the two groups of top templates 1 using the internal and external threaded sleeves 602 rotating on both sides of the threaded telescopic part 5;

[0042] The side plate 108 is fixed by the auxiliary bracket so that the side plate 108 opens upward, and the hinged top template 1 is sleeved on the inner circle of the annular protrusion 7 so that the top template 1 can be bent into the required arc shape, and the plastic film 8 is laid. At this time, the side plate 108 on the other side is fixed by the threaded column 3 to complete the basic shaping, and then the support truss 201 is hoisted to the inner circle of the top template 1, and the threaded sleeve 602 is rotated by the swing hinge block 601 to change the position of the threaded block 603, and the support truss 201 is connected to the top template 1 by rotating the threaded block 603, and the remaining side plate 108 and the side plates 111 on both sides are installed, and the foam glue is sprayed through the gap and waits for the foam glue to be shaped, and the support truss 201 is used to drive the top template 1 to rotate as a whole and place it above the connecting truss 202 by the hoisting mechanism, and the connecting truss 202 and the support truss 201 are fixed, and the whole is moved to the position where lining is required by the trolley, and the assembled top template part is contacted with the tunnel by the hydraulic lifting mechanism of the trolley.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable top formwork for a tunnel lining trolley, comprising a truss mechanism (2), characterized in that: The top end of the truss mechanism (2) is provided with a top mold formed by a plurality of top mold plates (1) hingedly connected to each other; Both ends of the top template (1) are arc-shaped, and staggered notches (101) are provided at both ends of the top template (1), a protrusion (102) is formed between two adjacent notches (101), the protrusion (102) is clamped with the notch (101) clamped on the adjacent top template (1), a through hole (103) concentric with the arcs at both ends of the top template (1) is provided in the middle of the protrusion (102), a hinge shaft (104) is sleeved in the middle of the through hole (103), the upper half of the notch (101) is wrapped and clamped on the upper half of the internal protrusion (102), and the bottom end of the notch (101) is provided with a hollow groove for accommodating the top templates (1) to be close to each other; A threaded hole (105) is provided on the inner side of the top template (1), the internal thread of the threaded hole (105) is connected to a threaded support portion (6), an end of the threaded sleeve (602) away from the top template (1) is hinged to a hinge seat (106), and the hinge seat (106) is fixedly connected to the truss mechanism (2); A thread groove (107) is provided in the middle of the side wall of the top template (1), and side plates (108) having the same shape as the top template formed by splicing a plurality of top templates (1) are provided on both sides of the top template (1), and the side plates (108) are threadedly connected to the thread groove (107) via threaded columns (3), and plug-in grooves (109) are provided on the outer sides of the top templates (1) and the outer sides of the side plates (108) on both sides, and plug-in blocks (110) are plugged into the inside of the plug-in grooves (109), and the plug-in blocks (110) on the same side are fixedly connected via side plates (111), and the side plates (111) are perpendicular to the top template (1).

2. The adjustable top formwork for a tunnel lining trolley according to claim 1, characterized in that: The top template (1) is provided with connecting extensions (4) on both sides, the connecting extensions (4) of the symmetrical top templates (1) are fitted together, one end of the hinge shaft (104) is a boss, and the other end is threadedly connected to a positioning nut (112), the boss and the positioning nut (112) are both located below the connecting extension (4), and the thread grooves (107) of the symmetrical top templates (1) are threadedly connected through a threaded telescopic portion (5).

3. The adjustable top formwork for a tunnel lining trolley according to claim 2, characterized in that: The threaded column (3) is a double-ended threaded column, one end of which is threadedly connected in the thread groove (107), and the other end passes through the side plate (108) and is threadedly connected to a locking nut (301). The threaded column (3) is located between the side plate (108) and the top template (1) and is provided with a rotating platform (302).

4. The adjustable top formwork for a tunnel lining trolley according to claim 2, characterized in that: The connecting extension (4) on one side of the top template (1) is provided with a sealing groove (401), and the connecting extension (4) on the other side of the top template (1) is fixedly mounted with a sealing block (402), and the sealing block (402) is inserted into the interior of the sealing groove (401).

5. The adjustable top formwork for tunnel lining trolley according to any one of claims 1 to 4, characterized in that: The truss mechanism (2) comprises a supporting truss (201) for supporting the top template (1) to fix its shape, and a connecting truss (202) for connecting to an existing trolley hydraulic jacking mechanism is fixedly installed at the bottom end of the supporting truss (201).

6. The adjustable top formwork for a tunnel lining trolley according to claim 5, characterized in that: The threaded support portion (6) is composed of three parts: a hinge block (601) hinged to the hinge seat (106) at the bottom end, a stud (605) in the middle for adjusting the length, and a threaded sleeve (602) threadedly connected to the outer surface of the stud (605), the stud (605) is fixedly connected to the hinge block (601), a threaded block (603) threadedly connected to the threaded hole (105) at the top end, the threaded block (603) and the threaded sleeve (602) are rotatably connected via a rotation limit rod (604), and the rotation limit rod (604) is threadedly connected to the threaded sleeve (602).

7. The adjustable top formwork for a tunnel lining trolley according to claim 6, characterized in that: The threaded telescopic portion (5) comprises a screw rod (501), a fixing portion (502) is fixedly mounted in the middle of the screw rod (501), and both ends of the screw rod (501) are threadedly connected with threaded inner and outer sleeves (503) for threaded connection with the thread groove (107).

8. The adjustable top formwork for a tunnel lining trolley according to claim 7, characterized in that: An annular protrusion (7) is arranged on the outer side of the side plate (108), and the inner circle radius of the annular protrusion (102) is the same as the distance between the center and the center point of the outer side of the top template (1).

9. The adjustable top formwork for a tunnel lining trolley according to claim 8, characterized in that: After a plurality of the top mold plates (1) are spliced ​​into a top mold, a plastic film (8) is laid on the inner circle of the top mold plate (1), and foam glue is filled between the gaps of the top mold plate (1) between the plastic films (8).

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