Quick-release backfill template

Abstract

The utility model discloses a quick release type backfill template which comprises side templates detachably connected with a pipeline, the side templates are arranged on the two sides of the pipeline, single sliding pins are arranged on the side templates, and when the side templates are connected with the pipeline, the single sliding pins of the side templates on the two sides abut against each other to form a sliding pin set. The sliding pin set is connected with a sliding pin lock in a sliding mode, and a locking groove connected with the sliding pin set is formed in the sliding pin lock. The single sliding pins are arranged on the side formworks, when the two side formworks abut against each other, the two single sliding pins are combined to form the sliding pin set, the sliding pin set is connected with the sliding pin lock, and therefore the sliding pin set is limited and fixed, the side formworks on the two sides are connected, and a pipeline is clamped between the side formworks.

Description

Technical Field

[0001] The utility model relates to the technical field of drainage pipelines, in particular to a quick-disassembly backfill formwork. Background Technique

[0002] Most pipelines in buildings need to pass through the floor slab. The part passing through the floor slab needs to meet the requirements of fire prevention and leakage prevention. Especially for the toilet drainage pipeline, leakage problems often occur at the part passing through the floor slab. The reason is that the joint between the pipeline and the floor slab is not properly treated. Especially for the toilet drainage pipeline, leakage often occurs. This phenomenon is generally caused by improper construction, mainly due to the non-dense plugging of the gap between the pipeline and the hole. One of the more important factors is that in order to save costs, the construction workers use wooden boards hoisted by iron wires or even foam boards for the backfill formwork used to plug the gap between the pipeline and the hole. Reasons such as the formwork being unstable and the iron wires needing to be left in the plugging cement will cause the plugging to be non-dense. In recent years, special finished backfill formworks have emerged on the market.

[0003] For example, the publication number "CN206707279U" discloses "a finished hanging formwork for pipeline reserved holes", which includes bolt one, bolt two, PVC mold one, PVC mold two, arc-shaped sleeve one, arc-shaped sleeve two, fixing seat and locking part. PVC mold one and PVC mold two are semi-circular rings. One side of PVC mold one has an arc-shaped sleeve one, and one side of PVC mold two has an arc-shaped sleeve two. There is a fixing seat on each side of arc-shaped sleeve one and arc-shaped sleeve two. There is a card slot in the fixing seat. Bolt one and bolt two respectively pass through the card slots of the two fixing seats on one side. There are positioning holes at the tails of bolt one and bolt two. The locking part passes through from above the fixing seat to the positioning holes corresponding to bolt one or bolt two. However, in actual application, the installation and disassembly are not convenient. Especially, the disassembly requires workers to work at heights, which is rather troublesome, resulting in high construction costs. At the same time, the production cost of the product is also relatively high. Summary of the Invention

[0004] Aiming at the problems of high construction costs and high product production costs existing in the prior art mentioned in the background technique, the utility model provides a quick-disassembly backfill formwork, which can reduce the cost of the backfill formwork itself. On the other hand, through structural improvement, the construction steps are simplified and the disassembly efficiency is improved.

[0005] To achieve the above object, the utility model adopts the following technical solutions.

[0006] A quick-detachable backfill template includes a side template detachably connected to a pipeline, the side template is arranged on both sides of the pipeline, and a single sliding pin is arranged on the side template. When the side template is connected to the pipeline, the single sliding pins of the side templates on both sides abut to form a sliding pin group, and the sliding pin group is slidably connected with a sliding pin lock, and a locking groove for connecting the sliding pin group is arranged in the sliding pin lock. By arranging a single sliding pin on the side template, when the two side templates abut together, the two single sliding pins are combined to form a sliding pin group, and the sliding pin lock is connected by the sliding pin group, so that the sliding pin group is limited and fixed, so that the side templates on both sides are connected and the pipeline is clamped in the middle, and because the sliding pin lock and the sliding pin group are slidably connected, they can be quickly disassembled, and the sliding pin lock can be directly removed by using a long rod tool, without the need to rotate the bolts for disassembly at high altitude, thereby improving the disassembly efficiency, wherein the sliding pin lock is provided to slide and connect the sliding pin group, thereby reducing the use of metal parts (bolts and nuts), reducing the installation and transportation costs, and making the overall lightweight.

[0007] Preferably, the sliding pin assembly includes a connection side connected to the side template, the sliding pin assembly includes an outer body side of the connection side, the sliding pin assembly includes a limiting protrusion arranged near one side of the outer body side, and the locking groove is provided with a limiting groove corresponding to the limiting protrusion. Through the cooperation between the limiting protrusion and the limiting groove, the stability of the sliding pin lock fixed on the sliding pin assembly can be ensured, the tightness of the connection can be improved, and the sliding pin lock can be prevented from falling out of the sliding pin assembly.

[0008] Preferably, the side template includes a disassembly plate, and the disassembly plate is provided with a disassembly hole. The disassembly plate is provided on the side template, wherein the disassembly hole provided on the disassembly plate can be used to remove the side template from the pipeline by tools such as hooks, so as to facilitate the staff to exert force.

[0009] Preferably, the sliding pin lock includes a locking pin body, the locking pin body includes a middle section, and a disassembly platform is arranged on the middle section. The middle section of the locking pin body is the area except the two ends, and a disassembly platform is arranged on the middle section. The sliding pin lock is driven to disengage from the sliding pin assembly by exerting force on the disassembly platform. Therefore, since the disassembly platform is arranged on the middle section, sufficient operating space can be reserved.

[0010] Preferably, a limit plate is provided on the disassembly platform. The limit plate provided on the disassembly platform can prevent the tool from falling off the disassembly platform when the tool is used to move the disassembly platform, thereby ensuring the reliability of the disassembly process.

[0011] Preferably, a pin reinforcing rib is provided between the disassembly platform and the pin body, and the pin reinforcing rib is arranged on one side of the disassembly platform facing the direction in which the sliding pin lock disengages from the sliding pin group. By providing the pin reinforcing rib, the structural strength of the disassembly platform can be improved. The pin reinforcing rib is arranged on one side of the disassembly platform facing the direction in which the sliding pin lock disengages from the sliding pin group, that is, the pin reinforcing rib can counteract the tendency of the disassembly platform to deform under force during the disassembly process, thereby ensuring the stability of the disassembly platform and reducing the probability of bending deformation.

[0012] Preferably, the locking groove includes a guiding and expanding opening. The guiding and expanding opening is provided on the locking groove, which can facilitate the connection of the sliding pin group. The guiding and expanding opening includes, but is not limited to, being formed by setting a rounded corner or a chamfer, and the size of the guiding and expanding opening is larger than the size of the rest of the locking groove.

[0013] Preferably, a pre-tightening portion is provided on the side template close to the pipeline, and the pre-tightening portion includes a shrinking port, and the size of the shrinking port is smaller than the size of the pipeline. The designer provides the pre-tightening portion on the side template close to the pipeline. During the process of connecting the side template to the pipeline, the pre-tightening portion is connected to the pipeline. The pre-tightening portion includes a shrinking port. Since the size of the shrinking port is smaller than the size of the pipeline, when the side template is connected to the pipeline, the shrinking port will engage with the pipeline, thereby realizing pre-fastening and ensuring that the side template can be initially fixed on the pipeline.

[0014] Preferably, the side template includes a radial plate and an axial plate, the radial plate and the axial plate are arranged alternately, and the single sliding pin is arranged on the axial plate. By arranging the alternating radial plate and axial plate, the structural strength can be enhanced, and the structural strength of the sliding pin group and the disassembly plate provided on the side template is better and not prone to deformation.

[0015] Preferably, a template reinforcing rib is provided between the radial plate and the axial plate. The template reinforcing rib provided on the radial plate and the axial plate can strengthen the connection relationship between the two, thereby improving the structural strength.

[0016] The beneficial effects of the present utility model are as follows:

[0017] (1) It can reduce the cost of the backfill template itself. On the other hand, through structural improvement, the construction steps are simplified and the disassembly efficiency is improved; (2) It can ensure the structural strength and reduce the impact on the device during the installation and disassembly process;

[0018] (3) It can improve the installation efficiency and at the same time ensure the connection stability of the side template. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is an exploded view of the present utility model.

[0020] Figure 2 is a partial axonometric view of the present utility model.

[0021] Figure 3 is a partial sectional view of the present utility model.

[0022] Figure 4 is an axonometric view of the sliding pin lock in the present utility model.

[0023] Figure 5 is a flow chart of the present utility model.

[0024] In the figure:

[0025] 1 side formwork, 11 disassembly plate, 12 disassembly hole, 13 radial plate, 14 axial plate, 15 formwork reinforcing rib, 16 pre-tightening part, 161 contraction port;

[0026] 2 single-body sliding pins, 21 sliding pin group, 211 connecting side, 212 outer body side, 213 limiting protrusion;

[0027] 3 sliding pin lock, 31 locking groove, 311 limiting groove, 312 guiding expansion opening, 32 lock pin body, 33 disassembly platform, 331 limiting plate, 332 lock pin reinforcing rib. Specific embodiments

[0028] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Embodiment 1:

[0030] As Figure 1 , 2 shown, a quick-disassembly backfill formwork includes a side formwork 1 detachably connected to a pipeline. The side formwork 1 is arranged on both sides of the pipeline. Single-body sliding pins 2 are arranged on the side formwork 1. When the side formwork 1 is connected to the pipeline, the single-body sliding pins 2 of the two side formworks 1 abut against each other to form a sliding pin group 21. The sliding pin group 21 is slidably connected to a sliding pin lock 3, and a locking groove 31 for connecting the sliding pin group 21 is arranged in the sliding pin lock 3. By arranging the single-body sliding pins 2 on the side formwork 1, when the two side formworks 1 abut against each other, the two single-body sliding pins 2 are combined to form a sliding pin group 21, and the sliding pin group 21 is connected to the sliding pin lock 3, so as to limit and fix the sliding pin group 21, so that the two side formworks 1 are connected and the pipeline is clamped in the middle. And because the sliding pin lock 3 and the sliding pin group 21 are slidably connected, it can be quickly disassembled, and a long rod tool can be directly used to directly remove the sliding pin lock 3 without performing high-altitude operation to rotate bolts for disassembly, improving the disassembly efficiency. Among them, the sliding pin lock 3 is arranged to slidably connect and fix the sliding pin group 21, thereby reducing the use of metal parts (bolts and nuts), reducing the installation and transportation costs, and at the same time making the whole lighter.

[0031] As Figure 3As shown, the sliding pin group 21 includes a connecting side 211 connecting to the side template 1. The sliding pin group 21 includes an outer body side 212 of the connecting side 211. The sliding pin group 21 includes a limiting protrusion 213 disposed on one side close to the outer body side 212. The locking groove 31 is provided with a limiting groove 311 corresponding to the limiting protrusion 213. Through the cooperation between the limiting protrusion 213 and the limiting groove 311, the stability of the sliding pin lock 3 fixed on the sliding pin group 21 can be ensured, the connection tightness can be improved, and the sliding pin lock 3 can be prevented from disengaging from the sliding pin group 21.

[0032] As Figure 1 shown, the side template 1 includes a disassembly plate 11, and a disassembly hole 12 is provided on the disassembly plate 11. The disassembly plate 11 is provided on the side template 1, and the disassembly hole 12 provided on the disassembly plate 11 can be used to pull out the side template 1 from the pipeline by tools such as hooks, facilitating the staff to exert force.

[0033] As Figure 4 shown, the locking groove 31 includes a guiding and expanding opening 312. The guiding and expanding opening 312 is provided on the locking groove 31, which can facilitate the connection with the sliding pin group 21. The guiding and expanding opening 312 includes, but is not limited to, being formed by setting rounded corners and chamfers. The size of the guiding and expanding opening 312 is larger than the size of the rest of the locking groove 31.

[0034] As Figure 1 shown, a pre-tightening part 16 is provided on the side of the side template 1 close to the pipeline. The pre-tightening part 16 includes a shrinking port 161, and the size of the shrinking port 161 is smaller than the size of the pipeline. The pre-tightening part 16 is designed on the side of the side template 1 close to the pipeline. During the process of connecting the side template 1 to the pipeline, the pre-tightening part 16 is connected to the pipeline. The pre-tightening part 16 includes a shrinking port 161. Since the size of the shrinking port 161 is smaller than the size of the pipeline, when the side template 1 is connected to the pipeline, the shrinking port 161 will engage with the pipeline, thereby achieving pre-tightening and ensuring that the side template 1 can be initially fixed on the pipeline.

[0035] As Figure 1 shown, the side template 1 includes a radial plate 13 and an axial plate 14, and the radial plate 13 and the axial plate 14 are arranged alternately. The single sliding pin 2 is arranged on the axial plate 14. By arranging the alternating radial plate 13 and axial plate 14, the structural strength can be enhanced, and the structural strength of the sliding pin group 21 and the disassembly plate 11 provided on the side template 1 is better and not prone to deformation.

[0036] As Figure 1 shown, a template reinforcing rib 15 is provided between the radial plate 13 and the axial plate 14. The template reinforcing rib 15 provided on the radial plate 13 and the axial plate 14 can strengthen the connection relationship between the two, thereby improving the structural strength.

[0037] In this embodiment, the assembly and working process of the quick-release backfill formwork are as follows: In this embodiment, two side formworks 1 are provided, and the two side plates are symmetrically arranged left and right. The side formwork 1 includes a radial plate 13 extending in the radial direction of the flue duct and an axial plate 14 arranged along the axial direction of the duct. The radial plate 13 and the axial plate 14 are arranged in a staggered manner. Both the radial plate 13 and the axial plate 14 are of a quasi-circular structure. When the two side formworks 1 are combined together, the two side formworks 1 clamp the duct in the middle of the axial plate 14. And in this embodiment, a plurality of formwork reinforcing ribs 15 are arranged at the bending corners of the axial plate 14 and the radial plate 13. Through the formwork reinforcing ribs 15, the structural strength of the connection between the radial plate 13 and the axial plate 14 can be improved. The formwork reinforcing ribs 15 are evenly distributed along the circumferential direction of the axial plate 14 to ensure uniformity. Further, the formwork reinforcing ribs 15 in the middle area of the side formwork 1 are set to be larger in size to form a disassembly plate 11, and a disassembly hole 12 is arranged on the disassembly plate 11. The disassembly hole 12 can pass through a hook for disassembling the side formwork 1, so that stable force can be exerted to quickly disassemble the side formwork 1. At the same time, by lengthening the hook, remote operation can be carried out without working at heights.

[0038] In this embodiment, single-body sliding pins 2 are arranged at both ends of the side formwork 1. The single-body sliding pins 2 are arranged at the junction of the axial plate 14 and the radial plate 13, and the extending direction of the single-body sliding pins 2 is the same as the axial direction of the axial plate 14. Therefore, the sliding direction of the sliding pin lock 3 is also the same as the axial direction of the axial plate 14. Further, when the two side formworks 1 are connected together, the single-body sliding pins 2 on both sides of the side formwork 1 are in contact with the single-body sliding pins 2 on both sides of the other side formwork 1. The two contacting single-body sliding pins 2 form a sliding pin group 21, and the sliding pin lock 3 can be slidably connected with the sliding pin group 21. A locking groove 31 is arranged inside the sliding pin lock 3. When the locking groove 31 is connected with the sliding pin group 21, the two single-body sliding pins 2 can be connected and limited, so as to achieve fixation.

[0039] Specifically, in this embodiment, the cross-sectional dimension of the single sliding pin 2 gradually increases on the side closer to the radial plate 13, so as to ensure that during the connection process between the sliding pin group 21 and the sliding pin lock 3, as the connection relationship between the sliding pin lock 3 and the sliding pin group 21 gradually deepens, the connection tightness gradually increases. At the same time, in this embodiment, a limiting protrusion 213 is provided on the sliding pin group 21, and the limiting protrusion 213 is provided on the side close to the outer body side 212. Since the connection side 211 is connected to the axial plate 14, an opening is provided on the locking groove 31 on the side close to the axial plate 14. A limiting protrusion 213 is provided on the sliding pin group 21, and a corresponding limiting groove 311 is provided in the locking groove 31. The connection stability can be improved through the connection relationship between the limiting protrusion 213 and the limiting groove 311, and the sliding pin lock 3 can be prevented from disengaging from the sliding pin group 21. And in this embodiment, a chamfer is provided on the side of the single sliding pin 2 away from the radial plate 13, and a guiding and expanding opening 312 is provided on the locking groove 31. The opening size of the guiding and expanding opening 312 is larger than the rest of the locking groove 31, forming a rounded corner or chamfer structure. Therefore, during the connection process of the sliding pin lock 3 and the sliding pin group 21, the connection fluency can be improved, and thus the installation efficiency can be improved.

[0040] Embodiment 2:

[0041] As Figure 4 shown, different from Embodiment 1, in this embodiment, 4. The sliding pin lock 3 includes a lock pin body 32, and the lock pin body 32 includes an intermediate section, and a disassembly platform 33 is provided on the intermediate section. The intermediate section of the lock pin body 32 is the area except for both ends. A disassembly platform 33 is provided on the intermediate section. By exerting force on the disassembly platform 33 to drive the sliding pin lock 3 to disengage from the sliding pin group 21, therefore, since the disassembly platform 33 is provided on the intermediate section, sufficient operating space can be left.

[0042] As Figure 4 shown, a limiting plate 331 is provided on the disassembly platform 33. The limiting plate 331 provided on the disassembly platform 33 can prevent the tool from disengaging from the disassembly platform 33 when using the tool to toggle the disassembly platform 33, ensuring the reliability of the disassembly process.

[0043] As Figure 4 shown, a lock pin reinforcing rib 332 is provided between the disassembly platform 33 and the lock pin body 32, and the lock pin reinforcing rib 332 is provided on the side of the disassembly platform 33 facing the direction in which the sliding pin lock 3 disengages from the sliding pin group 21. By providing the lock pin reinforcing rib 332, the structural strength of the disassembly platform 33 can be improved. The lock pin reinforcing rib 332 is provided on the side of the disassembly platform 33 facing the direction in which the sliding pin lock 3 disengages from the sliding pin group 21, that is, the lock pin reinforcing rib 332 can resist the tendency of the disassembly platform 33 to deform under force during the disassembly process, thereby ensuring the stability of the disassembly platform 33 and reducing the probability of bending deformation.

[0044] In this embodiment, the assembly and working process of the quick-release backfill formwork are as follows: In this embodiment, two side formworks 1 are provided, and the two side plates are symmetrically arranged left and right. The side formwork 1 includes a radial plate 13 extending in the radial direction of the smoke duct and an axial plate 14 arranged along the axial direction of the duct. The radial plate 13 and the axial plate 14 are arranged in a staggered manner. Both the radial plate 13 and the axial plate 14 are of a quasi-circular structure. When the two side formworks 1 are combined together, the two side formworks 1 clamp the duct in the middle of the axial plate 14. And in this embodiment, a plurality of formwork reinforcing ribs 15 are provided at the bending corners of the axial plate 14 and the radial plate 13. Through the formwork reinforcing ribs 15, the structural strength of the connection between the radial plate 13 and the axial plate 14 can be improved. The formwork reinforcing ribs 15 are evenly distributed along the circumferential direction of the axial plate 14 to ensure uniformity. Further, the formwork reinforcing ribs 15 in the middle area of the side formwork 1 are set to be larger in size to form a disassembly plate 11, and a disassembly hole 12 is provided on the disassembly plate 11. The disassembly hole 12 can pass through the hook for disassembling the side formwork 1, so that stable force can be exerted to quickly disassemble the side formwork 1. At the same time, by lengthening the hook, it is possible to perform remote operation without working at height.

[0045] Further, in this embodiment, a disassembly platform 33 is provided on the sliding pin lock 3. The disassembly platform 33 is arranged in the middle section of the sliding pin lock 3. The middle section is the non-two-end area of the sliding pin lock 3. Therefore, the disassembly platform 33 is provided in the middle section, so that there is a gap between the disassembly platform 33 and the radial plate 13, which allows the hook to pass through and pull the disassembly platform 33, thereby driving the sliding pin lock 3 to disengage from the sliding pin group 21. At the same time, a limiting plate 331 is provided on the side of the disassembly platform 33 away from the axial plate 14. Therefore, when the hook is placed on the disassembly platform 33, it will not easily come out. And a lock pin reinforcing rib 332 is provided between the disassembly platform 33 and the lock pin body 32. The lock pin reinforcing rib 332 is arranged on the side of the disassembly platform 33 away from the radial plate 13. Thus, during the process of the hook pulling the sliding pin lock 3, effective support can be provided through the lock pin reinforcing rib 332, and further the structural strength can be improved, avoiding bending damage to the disassembly platform 33 during the process of pulling the sliding pin lock 3 and affecting subsequent connection and disassembly.

[0046] In this embodiment, single slide pins 2 are arranged at both ends of the side formwork 1. The single slide pins 2 are arranged at the junction of the axial plate 14 and the radial plate 13, and the extending direction of the single slide pins 2 is the same as the axial direction of the axial plate 14. Therefore, the sliding direction of the slide pin lock 3 is also the same as the axial direction of the axial plate 14. Further, when the two side formworks 1 are connected together, the single slide pins 2 on both sides of the side formwork 1 are in contact with the single slide pins 2 on both sides of the other side formwork 1. The two in-contact single slide pins 2 form a slide pin group 21, and the slide pin lock 3 can be slidably connected to the slide pin group 21. A locking groove 31 is arranged inside the slide pin lock 3. When the locking groove 31 is connected to the slide pin group 21, the two single slide pins 2 can be connected and limited, so as to achieve fixation.

[0047] Specifically, in this embodiment, the cross-sectional dimension of the single slide pin 2 gradually increases on the side closer to the radial plate 13, so as to ensure that during the connection process of the slide pin group 21 and the slide pin lock 3, as the connection relationship between the slide pin lock 3 and the slide pin group 21 gradually deepens, the connection tightness gradually increases. At the same time, in this embodiment, a limiting protrusion 213 is arranged on the slide pin group 21. The limiting protrusion 213 is arranged on the side close to the outer body side 212. Since the connection side 211 is connected to the axial plate 14, an opening is arranged on the locking groove 31 on the side close to the axial plate 14. A limiting protrusion 213 is arranged on the slide pin group 21, and a limiting groove 311 is correspondingly arranged in the locking groove 31. The connection stability can be improved through the connection relationship between the limiting protrusion 213 and the limiting groove 311, and the slide pin lock 3 can be prevented from disengaging from the slide pin group 21. And in this embodiment, a chamfer is arranged on the side of the single slide pin 2 away from the radial plate 13, and a guiding enlarged opening 312 is arranged on the locking groove 31. The opening dimension of the guiding enlarged opening 312 is larger than the rest of the locking groove 31, forming a rounded corner or chamfer structure. Therefore, during the connection process of the slide pin lock 3 and the slide pin group 21, the connection smoothness can be improved, and thus the installation efficiency can be improved.

[0048] During installation:

[0049] The first step: Remove the raised cement impurities on the floor surface around the reserved hole and keep it flat.

[0050] The second step: Install the side formwork 1 on the pipeline from the side against the wall.

[0051] The third step: Install the other side on the other side of the pipeline along the symmetric direction.

[0052] The fourth step: Insert the slide pin lock 3 on one side into the slide pin group 21 to a depth of half, and pinch the other side by hand to keep the whole device from falling off.

[0053] Step 5: Insert the slide pin lock 3 on the other side to half of its depth, so that the backfill formwork and the pipe are in a semi-holding state.

[0054] Step 6: Use a hammer to knock the slide pin locks 3 on both sides to the bottom, and ensure that the backfill formwork is closely attached to the floor slab.

[0055] As Figure 5 shown, during disassembly:

[0056] Step 1: Make tools: Reinforcing bars about 8 mm thick and about 1.7 meters long, with a hook at one end.

[0057] Step 2: Hook the reinforcing bar on the disassembly platform 33 and pull it down forcefully to remove the two slide pin locks 3 in sequence.

[0058] Step 3: Hook the reinforcing bar in the formwork disassembly hole 12 and pull it down forcefully to remove the left and right side formworks 1 in sequence.

Claims

1. A quick-release backfill formwork, characterized in that, It includes side templates (1) detachably connected to the pipeline. The side templates (1) are arranged on both sides of the pipeline. Monomer sliding pins (2) are arranged on the side templates (1). When the side templates (1) are connected to the pipeline, the monomer sliding pins (2) of the two side templates (1) abut against each other to form a sliding pin group (21). A sliding pin lock (3) is slidably connected to the sliding pin group (21), and a locking groove (31) for connecting the sliding pin group (21) is arranged in the sliding pin lock (3).

2. The quick-release backfill formwork according to claim 1, wherein, The sliding pin group (21) includes a connecting side (211) connecting the side template (1), an outer body side (212) of the connecting side (211), a limiting protrusion (213) arranged on one side close to the outer body side (212), and a limiting groove (311) corresponding to the limiting protrusion (213) is arranged in the locking groove (31).

3. The quick-release backfill formwork according to claim 1, characterized in that, The side template (1) includes a disassembly plate (11), and a disassembly hole (12) is arranged on the disassembly plate (11).

4. A quick-release backfill formwork according to claim 1, characterized in that, The sliding pin lock (3) includes a lock pin body (32), and the lock pin body (32) includes an intermediate section, and a disassembly platform (33) is arranged on the intermediate section.

5. The quick-release backfill formwork according to claim 4, wherein A limiting plate (331) is arranged on the disassembly platform (33).

6. The quick-release backfill formwork according to claim 4, wherein, A lock pin reinforcing rib (332) is arranged between the disassembly platform (33) and the lock pin body (32), and the lock pin reinforcing rib (332) is arranged on one side of the disassembly platform (33) facing the direction in which the sliding pin lock (3) disengages from the sliding pin group (21).

7. A quick-release backfill formwork according to any one of claims 1-6, characterized in that, The locking groove (31) includes a guiding and expanding opening (312).

8. A quick-release backfill formwork according to any one of claims 1-6, characterized in that, A pre-tightening part (16) is arranged on the side of the side template (1) close to the pipeline. The pre-tightening part (16) includes a shrinking port (161), and the size of the shrinking port (161) is smaller than the size of the pipeline.

9. A quick-release backfill formwork according to any one of claims 1-6, characterized in that, The side template (1) includes a radial plate (13) and an axial plate (14). The radial plate (13) and the axial plate (14) are arranged alternately, and the monomer sliding pin (2) is arranged on the axial plate (14).

10. A quick-release backfill formwork according to claim 9, characterized in that, A template reinforcing rib (15) is arranged between the radial plate (13) and the axial plate (14).

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