Concrete lining layer prefabricating mold

Abstract

The utility model discloses a concrete lining layer prefabricating mould which comprises a base, an outer mould, an inner mould and at least one demoulding block, the outer mould is hollow and is detachably connected with the base, the inner mould is arranged in the outer mould and is detachably connected with the base, at least one demoulding notch is formed in the circumferential side wall of the inner mould, and the demoulding blocks are arranged opposite to the demoulding notches. A pouring gap used for pouring a lining layer is defined by the demolding blocks, the circumferential outer wall of the inner mold and the circumferential inner wall of the outer mold. The utility model can effectively solve the problem that a prefabricating or pouring mould capable of ensuring the integrity and stability of a lining structure is lacked.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of compressed air energy storage test, and particularly relates to a concrete lining layer prefabricated mould. BACKGROUND

[0002] The underground gas storage is an important part of the compressed air energy storage power station and is a technical key to guarantee the operation performance and reliability.

[0003] Generally, the geological structure of the underground gas storage for compressed air energy storage mainly includes water-bearing layer gas storage, natural deep buried cave gas storage and artificial cave gas storage, the high pressure load of the underground cave artificially excavated in hard rock is borne by the surrounding rock, compared with the natural cave, the concrete lining cooperated with the sealing layer can ensure good sealing, and the concrete lining gas storage mode has the technical advantages of small limitation by geological conditions, wide adaptation range, large gas storage capacity and high gas storage pressure, the storage of high pressure gas in the chamber will cause great pressure to the lining structure of the chamber, which can lead to cracking and gas leakage of the lining structure, therefore, the integrity and stability of the lining structure are crucial to the compressed air energy storage chamber, but the market currently lacks a mould for prefabricating or pouring the lining structure, so as to guarantee the integrity and stability of the lining structure.

[0004] Therefore, there is an urgent need for a concrete lining layer prefabricated mould to solve the problem of lacking a prefabricated or poured mould capable of guaranteeing the integrity and stability of the lining structure in the prior art. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming the above technical defects, and provides a concrete lining layer prefabricated mould to solve the technical problem of lacking a prefabricated or poured mould capable of guaranteeing the integrity and stability of the lining structure in the prior art.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a concrete lining layer prefabricated mould, which comprises:

[0008] A base;

[0009] An outer mould is internally hollow and detachably connected with the base;

[0010] An inner mould is internally arranged in the outer mould and detachably connected with the base, and at least one demoulding gap is formed in the circumferential side wall of the inner mould; and

[0011] At least one demolding module is arranged opposite to the demolding gap and detachably embedded in the demolding gap. The demolding module is enclosed between the circumferential outer wall of the inner mold and the circumferential inner wall of the outer mold to form a pouring gap for pouring the lining layer.

[0012] In some embodiments, the inner mold comprises a first inner half-arc mold, a second inner half-arc mold, and at least two first connecting members. The first inner half-arc mold and the second inner half-arc mold are arranged opposite to each other and are both arranged in the outer mold. One end of the first inner half-arc mold abuts one end of the second inner half-arc mold. The other end of the first inner half-arc mold is arranged apart from the other end of the second inner half-arc mold to form the demolding gap. The at least two first connecting members are connected to the first inner half-arc mold and the second inner half-arc mold.

[0013] In some embodiments, the demolding module is elastic. The demolding module is clamped in the demolding gap and elastically abuts the other end of the first inner half-arc mold, the other end of the second inner half-arc mold, and the base.

[0014] In some embodiments, opposite sides of the first inner half-arc mold and the second inner half-arc mold are respectively provided with a first frame and a second frame. The first frame is provided with at least one first mounting hole along the length direction thereof. The second frame is provided with a second mounting hole opposite to the first mounting hole. The first frame and the second frame abut at one end of the first inner half-arc mold and one end of the second inner half-arc mold. The first frame and the second frame are arranged apart at the other end of the first inner half-arc mold and the other end of the second inner half-arc mold. The first connecting member comprises a first bolt and a first nut. The threaded section of the first bolt passes through the first mounting hole and the second mounting hole in sequence. The first nut is threadedly connected to the threaded section of the first bolt and abuts the second frame. The large diameter section of the first bolt abuts the first frame.

[0015] In some embodiments, the inner mold further comprises at least two second connecting members. One end of each of the at least two second connecting members is connected to the circumferential inner wall of the first inner half-arc mold and the second inner half-arc mold. The other end of each of the at least two second connecting members is connected to the base.

[0016] In some embodiments, the outer mold comprises a first outer half-arc mold, a second outer half-arc mold, and at least two third connecting members. The first outer half-arc mold and the second outer half-arc mold are arranged opposite to each other and are both connected to the base. Two ends of the first outer half-arc mold and two ends of the second outer half-arc mold are respectively provided with a third frame and a fourth frame. The third frame and the fourth frame abut and are connected via the at least two third connecting members.

[0017] In some embodiments, the third frame is provided with at least one third mounting hole along the length direction of the third frame, the fourth frame is provided with a fourth mounting hole relative to the third frame, the third connecting member comprises a second bolt and a second nut, the threaded section of the second bolt passes through the third mounting hole and the fourth mounting hole in sequence, the second nut is threadedly connected to the threaded section of the second bolt and abuts against the fourth frame, and the large-diameter section of the second bolt abuts against the third frame.

[0018] In some embodiments, the outer mold further comprises three annular ribs, the three annular ribs are arranged at intervals along the length direction of the third frame and are connected to the first outer half-arc mold, the second outer half-arc mold, the third frame and the fourth frame.

[0019] In some embodiments, the base is provided with at least two threaded holes along the circumferential direction of the first outer half-arc mold and the second outer half-arc mold, one annular rib is provided with a fifth mounting hole relative to the threaded hole, the outer mold further comprises at least two fourth connecting members, the fourth connecting member has a large-diameter section and a threaded section, the threaded section of the fourth connecting member passes through the fifth mounting hole and is threadedly connected to the threaded hole, and the large-diameter section of the fourth connecting member abuts against one annular rib.

[0020] In some embodiments, the concrete lining layer prefabricated mold further comprises a demolding assembly, the demolding assembly comprises a hoisting member and four embedded members, the hoisting member is connected to an external hoisting device, the four embedded members are uniformly distributed and embedded in the pouring gap, and are detachably connected to the hoisting member.

[0021] Compared with the prior art, the beneficial effects of the concrete lining layer prefabricated mold of the utility model include that the outer mold is detachably arranged on the base, the inner mold is arranged in the outer mold, the inner mold is detachably connected to the base, at least one demolding gap is arranged on the circumferential side wall of the inner mold, at least one demolding module is detachably arranged in the demolding gap, and the pouring gap for pouring the lining layer is formed between the circumferential outer wall of the inner mold and the circumferential inner wall of the outer mold. Compared with the prior art, the outer mold and the inner mold are detachably connected to the base and form the pouring gap, at least one demolding gap is arranged on the circumferential side wall of the inner mold, and the demolding module is detachably arranged in the demolding gap, so that demolding after pouring and forming is facilitated. The device not only has a simple structure and facilitates demolding, but also can guarantee the integrity and stability of the poured product, and can solve the problem of the prior art that there is no prefabricated or pouring mold capable of guaranteeing the integrity and stability of the lining structure. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a three-dimensional structure schematic view of a concrete lining layer prefabricated mold provided by the utility model embodiment;

[0023] Figure 2 is a three-dimensional structure schematic view of another perspective of the prefabricated mold for concrete lining layer provided by the embodiment of the utility model;

[0024] Figure 3 is a three-dimensional structure schematic view of the base connected with the outer mold and the inner mold provided by the embodiment of the utility model;

[0025] Figure 4 is a three-dimensional structure schematic view of another perspective of the base connected with the outer mold and the inner mold provided by the embodiment of the utility model.

[0026] Mark explanation:

[0027] Base 1; Outer mold 2; First outer half arc mold 21; Second outer half arc mold 22; Third connecting piece 23; Third frame 24; Fourth frame 25; Annular rib 26; Fourth connecting piece 27; Inner mold 3; Demoulding gap 31; First inner half arc mold 32; Second inner half arc mold 33; First connecting piece 34; Second connecting piece 35 First frame 36; Second frame 37; Demoulding module 4; Pouring gap 5 Demoulding assembly 6; Hoisting piece 61; Embedded part 62. Specific implementation

[0028] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following is combined with the drawing and embodiment, and the utility model is further described in detail.It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0029] In order to solve the technical problem that the prefabricated or pouring mold capable of guaranteeing the integrity and stability of the lining structure is lacked, the utility model provides a prefabricated mold for concrete lining layer, which can realize that the outer mold 2 and the inner mold 3 are detachably connected on the base 1 and form the pouring gap 5, and at least one demoulding gap 31 is further arranged on the circumferential side wall of the inner mold 3, and the demoulding module 4 is detachably arranged in the demoulding gap 31, which is convenient for demoulding after pouring forming.The device not only has simple structure and is convenient for demoulding, but also can guarantee the integrity and stability of the poured product.

[0030] It should be noted that the prefabricated mold for concrete lining layer of the utility model is used in but not limited to the technical field of compressed air energy storage test, in order to facilitate the description, in the utility model, only the prefabricated mold for concrete lining layer is applied to the technical field of compressed air energy storage test as an example for description, and the principle of the prefabricated mold for concrete lining layer applied to other types of equipment is substantially the same as that applied to the technical field of compressed air energy storage test, which is not described here.

[0031] Please refer to Figures 1 to 4 , Figure 1 , Figure 2As shown in the structural schematic view of the prefabricated mold for the concrete lining layer in the embodiment of the utility model, the prefabricated mold for the concrete lining layer comprises a base 1, an outer mold 2, an inner mold 3 and at least one demolding block 4, the inner mold 2 is hollow inside and is detachably connected with the base 1, the inner mold 3 is built-in the outer mold 2 and is detachably connected with the base 1, at least one demolding gap 31 is formed on the circumferential side wall of the inner mold 3, the demolding block 4 is arranged opposite to the demolding gap 31 and is detachably embedded in the demolding gap 31, and the pouring gap 5 for pouring the lining layer is formed between the circumferential outer wall of the inner mold 3 and the circumferential inner wall of the outer mold 2.

[0032] In the device, the outer mold 2 is detachably arranged on the base 1, the inner mold 3 is arranged in the outer mold 2, the inner mold 3 is detachably connected with the base 1, at least one demolding gap 31 is formed on the circumferential side wall of the inner mold 3, and at least one demolding block 4 is detachably embedded in the demolding gap 31, and the pouring gap 5 for pouring the lining layer is formed between the circumferential outer wall of the inner mold 3 and the circumferential inner wall of the outer mold 2.

[0033] Compared with the prior art, the outer mold 2 and the inner mold 3 are detachably connected on the base 1 and form the pouring gap 5, at least one demolding gap 31 is formed on the circumferential side wall of the inner mold 3, and the demolding block 4 is detachably arranged in the demolding gap 31, which is convenient for demolding after pouring and forming, the device not only has a simple structure and is convenient for demolding, but also can ensure the integrity and stability of the poured product, and can solve the problem that the prefabricated or pouring mold capable of ensuring the integrity and stability of the lining structure is lacked in the prior art.

[0034] Further, the base 1, the outer mold 2 and the inner mold 3 are all common steel or plate materials on the market and are easy to purchase, which are conventional settings known to those skilled in the art and will not be described in detail here.

[0035] In the embodiment, as shown in the structural schematic view of the prefabricated mold for the concrete lining layer in the embodiment of the utility model, the prefabricated mold for the concrete lining layer comprises a base 1, an outer mold 2, an inner mold 3 and at least one demolding block 4, the inner mold 2 is hollow inside and is detachably connected with the base 1, the inner mold 3 is built-in the outer mold 2 and is detachably connected with the base 1, at least one demolding gap 31 is formed on the circumferential side wall of the inner mold 3, the demolding block 4 is arranged opposite to the demolding gap 31 and is detachably embedded in the demolding gap 31, and the pouring gap 5 for pouring the lining layer is formed between the circumferential outer wall of the inner mold 3 and the circumferential inner wall of the outer mold 2. Figure 3 , Figure 4 As shown in the structural schematic view of the prefabricated mold for the concrete lining layer in the embodiment of the utility model, the prefabricated mold for the concrete lining layer comprises a base 1, an outer mold 2, an inner mold 3 and at least one demolding block 4, the inner mold 2 is hollow inside and is detachably connected with the base 1, the inner mold 3 is built-in the outer mold 2 and is detachably connected with the base 1, at least one demolding gap 31 is formed on the circumferential side wall of the inner mold 3, the demolding block 4 is arranged opposite to the demolding gap 31 and is detachably embedded in the demolding gap 31, and the pouring gap 5 for pouring the lining layer is formed between the circumferential outer wall of the inner mold 3 and the circumferential inner wall of the outer mold 2.

[0036] The outer mold 2 is formed in a cylindrical structure by the first outer half-arc mold 21, the second outer half-arc mold 22 and the at least two third connecting pieces 23, the first outer half-arc mold 21 and the second outer half-arc mold 22 are detachably connected through the third edge frame 24 and the fourth edge frame 25 arranged opposite at the two ends thereof via the at least two third connecting pieces 23, which can be conveniently disassembled by the user and is convenient for demolding the lining layer after pouring and forming.

[0037] Further, the first outer half-arc mold 21 and the second outer half-arc mold 22 are common steel or plate materials on the market and are easy to purchase, which are conventional settings known to those skilled in the art and will not be described in detail here.

[0038] In one embodiment, the third frame 24 is provided with at least one third mounting hole along the length direction thereof, the fourth frame 25 is provided with a fourth mounting hole relative to the third frame 24, the third connecting piece 23 includes a second bolt and a second nut, the threaded section of the second bolt passes through the third mounting hole and the fourth mounting hole in sequence, the second nut is threadedly connected to the threaded section of the second bolt and abuts against the fourth frame 25, and the large-diameter section of the second bolt abuts against the third frame 24.

[0039] The third frame 24 and the fourth frame 25 are detachably connected through the threaded connection of the second bolt and the second nut, which is convenient for users to disassemble and assemble.

[0040] Further, the second bolt and the second nut are common equipment on the market and are easy to purchase, which are conventional settings known to those skilled in the art and will not be described in detail here.

[0041] In one embodiment, as shown in FIG. 1, the outer mold 2 further includes three annular ribs 26, which are arranged at intervals along the length direction of the third frame 24 and are connected to the first outer half-arc mold 21, the second outer half-arc mold 22, the third frame 24 and the fourth frame 25. Figures 1 to 4 The three annular ribs 26 are arranged at intervals and along the circumference of the outer mold 2, which are used to enhance the strength of the outer mold 2. The annular ribs 26 are arc-shaped plates, which are common steel or plate materials on the market and are easy to purchase, which are conventional settings known to those skilled in the art and will not be described in detail here.

[0042] In one embodiment, as shown in FIG. 1, the base 1 is provided with at least two threaded holes along the circumferential direction of the first outer half-arc mold 21 and the second outer half-arc mold 22, one annular rib 26 is provided with a fifth mounting hole relative to the threaded hole, and the outer mold 2 further includes at least two fourth connecting pieces 27, which have a large-diameter section and a threaded section. The threaded section of the fourth connecting piece 27 passes through the fifth mounting hole and is threadedly connected to the threaded hole, and the large-diameter section of the fourth connecting piece 27 abuts against one annular rib 26.

[0043] Figure 2 The base plate and the outer mold 2 are detachably connected through one annular rib 26 and at least two third and fourth connecting pieces 27 and the threaded holes on the base 1, so that the outer mold 2 is fixedly installed on the base 1, thereby improving the stability of the installation of the device.

[0044] The base plate and the outer mold 2 are detachably connected through one annular rib 26 and at least two third and fourth connecting pieces 27 and the threaded holes on the base 1, so that the outer mold 2 is fixedly installed on the base 1, thereby improving the stability of the installation of the device.

[0045] ​In the embodiment, as shown in Figure 3 , Figure 4 The inner mold 3 comprises a first inner half-arc mold 32, a second inner half-arc mold 33, and at least two first connecting members 34 and at least two second connecting members 35.

[0046] The first inner half-arc mold 32 and the second inner half-arc mold 33 are oppositely arranged and are both arranged in the outer mold 2. One end of the first inner half-arc mold 32 abuts against one end of the second inner half-arc mold 33. The other end of the first inner half-arc mold 32 is arranged in a spaced manner from the other end of the second inner half-arc mold 33, and the first inner half-arc mold 32 and the second inner half-arc mold 33 jointly form a demolding gap 31. The at least two first connecting members 34 are connected to the first inner half-arc mold 32 and the second inner half-arc mold 33.

[0047] The inner mold 3 is formed by the first inner half-arc mold 32 and the second inner half-arc mold 33 through the at least two first connecting members 34 to form a detachable connection structure. The demolding gap 31 for placing the demolding module 4 is formed at the other end of the first inner half-arc mold 32 and the other end of the second inner half-arc mold 33, thereby facilitating demolding.

[0048] In one embodiment, the demolding module 4 is elastic. The demolding module 4 is clamped in the demolding gap 31 and elastically abuts against the other end of the first inner half-arc mold 32, the other end of the second inner half-arc mold 33, and the base 1.

[0049] Here, the demolding module 4 is in a strip shape and is elastic, so that the demolding module 4 can abut against the side wall of the demolding gap 31, thereby increasing the sealing effect and increasing the integrity and stability of the formed product after pouring.

[0050] Further, the demolding module 4 is a common and easily purchased device on the market and is a conventional arrangement known to those skilled in the art, which will not be described in detail here.

[0051] In one embodiment, as shown in Figure 3 , Figure 4 The opposite sides of the first inner half-arc mold 32 and the second inner half-arc mold 33 are respectively formed with a first frame 36 and a second frame 37. The first frame 36 is provided with at least one first mounting hole along the length direction thereof. The second frame 37 is provided with a second mounting hole opposite to the first mounting hole. The first frame 36 and the second frame 37 abut against each other at one end of the first inner half-arc mold 32 and one end of the second inner half-arc mold 33. The first frame 36 and the second frame 37 are arranged in a spaced manner at the other end of the first inner half-arc mold 32 and the other end of the second inner half-arc mold 33. The first connecting member 34 comprises a first bolt and a first nut. The threaded section of the first bolt passes through the first mounting hole and the second mounting hole in sequence. The first nut is threadedly connected to the threaded section of the first bolt and abuts against the second frame 37. The large-diameter section of the first bolt abuts against the first frame 36.

[0052] The first inner half-arc mold 32 and the second inner half-arc mold 33 are detachably connected by the first edge frame 36 and the second edge frame 37 through at least two first bolts and first nuts.

[0053] Further, the first bolts and the first nuts are common and easy-to-purchase devices in the market, and are common settings known to those skilled in the art, which will not be described in detail here.

[0054] In one embodiment, as shown in Figure 3 The inner mold 3 further comprises at least two second connecting members 35, one end of each of the at least two second connecting members 35 being connected to the circumferential inner wall of the first inner half-arc mold 32 and the second inner half-arc mold 33 respectively, and the other end of each of the at least two second connecting members 35 being connected to the base 1.

[0055] In order to increase the stability of the inner mold 3, the first inner half-arc mold 32 and the second inner half-arc mold 33 are connected via the at least two second connecting members 35 and the base 1.

[0056] Further, the second connecting members 35 comprise L-shaped angle steels and bolts, two mutually perpendicular edges of each L-shaped angle steel being connected to the mutually perpendicular base 1 and the first inner half-arc mold 32 or the second inner half-arc mold 33 respectively, which will not be described in detail here.

[0057] In this example, as shown in Figure 1 , Figure 2 The demolding assembly 6 comprises a hoisting member 61 and four embedded members 62, the hoisting member 61 being connected to an external hoisting device, and the four embedded members 62 being evenly distributed and embedded in the pouring gap 5 and detachably connected to the hoisting member 61.

[0058] By embedding the embedded members 62 in the pouring gap 5 and detachably connecting the embedded members 62 and the hoisting member 61, the external hoisting device can be used to hoist the poured lining layer out of the mold, facilitating demolding.

[0059] Further, the hoisting member 61 comprises a hoisting plate, a lifting ring connected to the hoisting plate for connection to the external hoisting device, and four chains evenly arranged along the circumference of the hoisting plate and detachable from the four embedded members 62.

[0060] Further, the external hoisting device can be a travelling crane or a crane, which is a common setting known to those skilled in the art, which will not be described in detail here.

[0061] The specific working process of the utility model, the base 1 detachable setting has the outer mould 2, the inner mould 3 is set up in the outer mould 2, the inner mould 3 is detachably connected with the base 1, and at least one stripping gap 31 is set up on the circumferential side wall of the inner mould 3, and at least one stripping module 4 is detachably embedded in the stripping gap 31, and the circumferential outer wall of the inner mould 3 and the circumferential inner wall of the outer mould 2 are combined to form a pouring gap 5 for pouring lining layer.Compared with the prior art, the outer mould 2 and the inner mould 3 are detachably connected on the base 1, and the pouring gap 5 is formed, and at least one stripping gap 31 is set up on the circumferential side wall of the inner mould 3, and the stripping module 4 is detachably set up in the stripping gap 31, which is convenient for stripping after pouring forming, and the device not only has simple structure and is convenient for stripping, but also can guarantee the integrity and stability of the poured product.

[0062] In use, the user first abuts the first outer half-arc mould 21 and the second outer half-arc mould 22, and connects the plurality of second bolts and the second nuts in cooperation, so that the first outer half-arc mould 21 and the second outer half-arc mould 22 form a cylindrical shape, then connects the outer mould 2 on the base 1, then abuts the first inner half-arc mould 32 and the second inner half-arc mould 33, and connects the plurality of first bolts and the first nuts in cooperation, so that the first inner half-arc mould 32 and the second inner half-arc mould 33 form a cylindrical shape, then connects the inner mould 3 on the base 1, then clamps the stripping module 4 in the stripping gap 31, and finally pours the concrete into the pouring gap 5, and embeds the embedded part 62 in the pouring gap 5.

[0063] Further, in stripping, the outer mould 2, the inner mould 3 and the stripping module 4 are sequentially disassembled, the embedded part 62 is detachably connected with the lifting part 61, the formed lining layer is lifted by the external lifting equipment, and stripping and transfer are completed.

[0064] The device solves the problem of lacking prefabricated or pouring moulds capable of guaranteeing the integrity and stability of the lining structure in the prior art.

[0065] The specific embodiment of the utility model described above does not constitute a limitation on the protection scope of the utility model. Any various other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A precast form for a concrete lining course, characterised in that, The utility model relates to a detachable inner and outer mold for casting lining layer, comprising: a base; an outer mold, which is hollow inside and detachably connected with the base; an inner mold, which is built inside the outer mold and detachably connected with the base, and has at least one demolding gap on the circumferential side wall of the inner mold; at least one demolding block, which is arranged opposite to the demolding gap and detachably embedded in the demolding gap, and has a pouring gap for pouring the lining layer between the circumferential outer wall of the inner mold and the circumferential inner wall of the outer mold. The inner mold comprises a first inner half-arc mold, a second inner half-arc mold and at least two first connecting pieces. The first inner half-arc mold and the second inner half-arc mold are oppositely arranged and both built inside the outer mold. One end of the first inner half-arc mold abuts against one end of the second inner half-arc mold, and the other end of the first inner half-arc mold is spaced apart from the other end of the second inner half-arc mold to form the demolding gap. The first connecting pieces are connected with the first inner half-arc mold and the second inner half-arc mold.

2. The concrete lining course precast mould of claim 1, wherein, The demolding block is elastic, and is elastically abutted against the other end of the first inner half-arc mold, the other end of the second inner half-arc mold and the base.

3. The concrete lining course precast mould of claim 2, wherein, The opposite sides of the first inner half-arc mold and the second inner half-arc mold are respectively formed with a first frame and a second frame. The first frame is provided with at least one first mounting hole along the length direction of the first frame. The second frame is provided with a second mounting hole opposite to the first mounting hole. The first frame and the second frame abut against each other at one end of the first inner half-arc mold and one end of the second inner half-arc mold, and are spaced apart at the other end of the first inner half-arc mold and the other end of the second inner half-arc mold. The first connecting piece comprises a first bolt and a first nut. The threaded section of the first bolt passes through the first mounting hole and the second mounting hole in sequence. The first nut is threadedly connected to the threaded section of the first bolt and abuts against the second frame. The large-diameter section of the first bolt abuts against the first frame.

4. The concrete lining course precast mold of claim 2, wherein, The inner mold further comprises at least two second connecting pieces. One end of each of the second connecting pieces is connected to the circumferential inner wall of the first inner half-arc mold and the second inner half-arc mold, and the other end of each of the second connecting pieces is connected to the base.

5. The concrete lining course precast mold of claim 2, wherein, The outer mold comprises a first outer half-arc mold, a second outer half-arc mold and at least two third connecting pieces. The first outer half-arc mold and the second outer half-arc mold are oppositely arranged and both connected to the base. The two ends of the first outer half-arc mold and the two ends of the second outer half-arc mold are respectively formed with a third frame and a fourth frame. The third frame and the fourth frame abut against each other and are connected through the third connecting pieces.

6. The concrete lining course precast mold of claim 1, wherein, The third frame is provided with at least one third mounting hole along the length direction of the third frame. The fourth frame is provided with a fourth mounting hole opposite to the third frame. The third connecting piece comprises a second bolt and a second nut. The threaded section of the second bolt passes through the third mounting hole and the fourth mounting hole in sequence. The second nut is threadedly connected to the threaded section of the second bolt and abuts against the fourth frame. The large-diameter section of the second bolt abuts against the third frame.

7. The concrete lining course precast mould of claim 6, wherein, ​ 8. The concrete lining course precast mould of claim 7, wherein, The outer mold further comprises three annular ribs, which are arranged along the length direction of the third frame and connected with the first outer half-arc mold, the second outer half-arc mold, the third frame and the fourth frame.

9. The concrete lining course precast mould of claim 8, wherein, The base is provided with at least two threaded holes along the circumferential direction of the first outer half-arc mold and the second outer half-arc mold, one annular rib is provided with a fifth mounting hole opposite to the threaded hole, the outer mold further comprises at least two fourth connecting pieces, the fourth connecting piece has a large diameter section and a threaded section, the threaded section of the fourth connecting piece passes through the fifth mounting hole and is threadedly connected with the threaded hole, and the large diameter section of the fourth connecting piece abuts against one annular rib.

10. The concrete lining course precast mold of claim 1, wherein, Further comprising a demolding assembly, the demolding assembly comprises a hoisting piece and four pre-buried pieces, the hoisting piece is connected with an external hoisting equipment, the four pre-buried pieces are uniformly distributed and pre-buried in the pouring gap and are detachably connected with the hoisting piece.

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