Corrosion-resistant precast concrete inspection well

Abstract

The utility model discloses a kind of corrosion-resistant precast concrete inspection wells, including pedestal, cylinder and cover, the top of the pedestal is connected with the bottom of the cylinder, the bottom of the cover is connected with the top of the cylinder;The cylinder includes outer tube and inner tube, the bottom of the outer tube and inner tube is fixed with the pedestal, cavity is formed between the outer tube and inner tube, the cavity is cooperated with the pedestal and is formed with annular water collecting tank, drain pipe is equipped on the outer tube, one end of the drain pipe extends into the annular water collecting tank, to drain the liquid in the annular water collecting tank to the cylinder outside.The utility model can improve the corrosion resistance of precast concrete inspection well.

Description

Technical Field

[0001] This utility model relates to the field of cement component technology, and in particular to a corrosion-resistant precast concrete inspection well. Background Technology

[0002] Precast concrete inspection wells are underground facilities constructed by pre-casting and curing concrete components in a factory, which are then transported to the construction site and rapidly assembled. Their core definition is a standardized, factory-produced concrete structural unit used at nodes in underground pipe network systems (such as drainage, rainwater, sewage, cables, and communications).

[0003] While existing precast concrete inspection wells have good durability and corrosion resistance under normal conditions, their corrosion resistance may significantly decrease or fail under harsh environments such as strong acids, high concentrations of sulfate / magnesium salts, chloride ions (especially when accompanied by structural defects), stray currents, and microbial acid production (H2SO4).

[0004] Therefore, it is urgent to research and develop a corrosion-resistant precast concrete inspection well to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a corrosion-resistant precast concrete inspection well, which can improve the corrosion resistance of precast concrete inspection wells.

[0006] To achieve the above objectives, this utility model provides a corrosion-resistant precast concrete inspection well, the specific implementation scheme of which is as follows:

[0007] A corrosion-resistant precast concrete inspection well includes a base, a cylinder, and a cover, wherein the top of the base is connected to the bottom of the cylinder, and the bottom of the cover is connected to the top of the cylinder;

[0008] The cylinder includes an outer cylinder and an inner cylinder. The bottoms of the outer cylinder and the inner cylinder are fixed to the base. A cavity is formed between the outer cylinder and the inner cylinder. The cavity and the base cooperate to form an annular water collection groove. A drain pipe is provided on the outer cylinder. One end of the drain pipe extends into the annular water collection groove to discharge the liquid in the annular water collection groove to the outside of the cylinder.

[0009] This utility model discloses a corrosion-resistant precast concrete inspection well. Compared with the prior art, the inspection well is designed as a split base, cylinder, and cover. The cylinder is composed of an outer cylinder and an inner cylinder, with a cavity formed between the outer and inner cylinders. The cavity, together with the base, forms an annular water collection tank. A drain pipe is used to discharge the liquid in the annular water collection tank to the outside of the cavity. On the one hand, acid / salt liquids that seep into the outer cylinder are intercepted by the cavity and enter the annular water collection tank and are discharged by the drain pipe, avoiding corrosive liquids from contacting the inner cylinder concrete and causing corrosion. On the other hand, the humidity buffer area formed by the cavity can reduce the erosion of the inner cylinder by condensation. Draining the liquid in the annular water collection tank avoids structural damage caused by freeze-thaw expansion stress, thus improving the corrosion resistance of the inspection well.

[0010] In some embodiments, the inner circumferential wall of the inner cylinder is covered with a corrosion-resistant lining metal plate, which is detachably connected to the inner cylinder.

[0011] By covering the inner circumferential wall of the inner cylinder with a corrosion-resistant lining metal plate, the corrosion-resistant lining metal plate and the inner cylinder can be detachably connected. The corrosion-resistant lining metal plate directly bears the scouring and chemical corrosion of the medium, protecting the concrete of the inner cylinder. Even if the corrosion-resistant lining metal plate is partially corroded, it can be removed and replaced, avoiding the overall scrapping of the cylinder.

[0012] In some embodiments, the inner wall of the inner cylinder is pre-embedded with anchors, the anchors having slots, and the bottom of the corrosion-resistant inner lining metal plate has a snap-fit ​​block, the snap-fit ​​block being embedded in the slot and fixed in the slot by bolts.

[0013] By pre-embedding anchors on the inner wall of the inner cylinder, and setting slots on the anchors for the snap-fit ​​blocks at the bottom of the corrosion-resistant inner lining metal plate to be embedded, and then using a bolt structure to achieve fixation, the rapid positioning of the connection between the corrosion-resistant inner lining metal plate and the inner cylinder is improved, thereby improving the connection accuracy and connection stability.

[0014] In some embodiments, corrosion-resistant sealing strips are provided at the joints of the corrosion-resistant inner lining metal plate.

[0015] By installing corrosion-resistant sealing strips at the joints of the corrosion-resistant inner lining metal plates, the gaps between the plates are filled, preventing corrosive media from seeping into the concrete joints. Furthermore, the inherent elasticity of the corrosion-resistant sealing strips adapts to the expansion and contraction of the inner lining plates caused by temperature changes, maintaining long-term sealing performance.

[0016] In some embodiments, the corrosion-resistant inner lining metal plate is any one of stainless steel, duplex steel, or plastic composite plate.

[0017] By setting the corrosion-resistant inner lining metal plate to any of stainless steel, duplex steel, or plastic composite plate, the material selection can be matched to different environments and working conditions in actual use.

[0018] In some embodiments, an elastic rubber ring is provided on the outer peripheral wall of the drain pipe, a connecting hole for communicating with the cavity is provided on the outer cylinder, and an annular sealing groove is provided on the inner peripheral wall of the connecting hole, wherein the elastic rubber ring is embedded in the annular sealing groove and seals with the annular sealing groove.

[0019] By installing an elastic rubber ring on the outer wall of the drain pipe, the drain pipe and the outer cylinder are sealed by embedding the elastic rubber ring into the annular sealing groove of the connection hole, preventing liquid leakage in the annular water collection tank from corroding the outer cylinder. The elasticity of the elastic rubber ring absorbs the vibration caused by foundation settlement or vehicle load, reducing the risk of cracking of the connection hole.

[0020] In some embodiments, the outer wall of the outer cylinder is provided with a receiving groove, the inner peripheral wall of the receiving groove is provided with a first thread, the outer wall of the drain pipe is provided with a sealing flange, the outer peripheral wall of the sealing flange is provided with a second thread, the sealing flange is embedded in the receiving groove, and the second thread is screwed to the first thread.

[0021] By setting a receiving groove on the outer wall of the outer cylinder and a sealing flange on the outer wall of the drain pipe, the second thread on the sealing flange and the first thread on the inner circumferential wall of the receiving groove are screwed together, and a double-layer seal is achieved in conjunction with an elastic rubber ring, thereby improving the sealing effect.

[0022] In some embodiments, the outer peripheral wall of the base is provided with a hot-dip galvanized layer, and the outer peripheral wall of the hot-dip galvanized layer is covered with an epoxy coating.

[0023] By setting a hot-dip galvanized layer on the outer peripheral wall of the base, and covering the outer peripheral wall of the hot-dip galvanized layer with an epoxy coating, moisture / oxygen is isolated from contact with the base, the corrosion reaction chain is blocked, and the sacrificial anode of the hot-dip galvanized layer is used to protect the steel substrate and delay soil electrolytic corrosion.

[0024] In some embodiments, the base has a plurality of connecting rods at its bottom, and the connecting rods have an adjusting plate, with an anti-corrosion pad between the adjusting plate and the base.

[0025] By installing a connecting rod at the bottom of the base, and an adjusting plate on the connecting rod, the adjusting plate compensates for uneven settlement of the foundation by adjusting the height of the adjusting plate on the connecting rod, thus preventing the well body from cracking and forming corrosion channels. An anti-corrosion pad is installed between the adjusting plate and the base to block the rise of capillary water in the soil and protect the steel base.

[0026] In some embodiments, the cover is provided with a plurality of latches, each latch engaging with the outer wall of the cylinder, and a silicone sealing ring is fixed to the bottom of the cover, the silicone sealing ring engaging with the top of the cylinder.

[0027] By setting several latches on the cover, and using the latches to lock in place with the top of the cylinder, the silicone sealing ring fixed at the bottom of the cover and the top of the cylinder are sealed together, thus achieving a seal between the cover and the cylinder, preventing the intrusion of corrosive gases such as hydrogen disulfide, and inhibiting the production of acid by microorganisms.

[0028] Based on the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0029] By designing the inspection well as a separate base, cylinder, and cover, with the cylinder consisting of an outer and inner cylinder forming a cavity between them, the cavity, together with the base, forms an annular water collection trough. A drain pipe is used to discharge the liquid from the annular water collection trough to the outside of the cavity. On one hand, acid / salt liquids seeping through the outer cylinder are intercepted by the cavity and discharged into the annular water collection trough via the drain pipe, preventing corrosive liquids from contacting the inner cylinder concrete and causing corrosion. On the other hand, the humidity buffer zone formed by the cavity reduces the erosion of the inner cylinder by condensate. Draining the liquid from the annular water collection trough prevents structural damage caused by freeze-thaw expansion stress, thus improving the corrosion resistance of the inspection well. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of this utility model;

[0031] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0032] Figure 3 For the present utility model Figure 2 A magnified view of a portion of the image.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. Base; 110. Hot-dip galvanized layer; 120. Epoxy coating; 130. Connecting rod; 140. Adjusting plate; 150. Anti-corrosion pad; 200. Cylinder; 210. Outer cylinder; 211. Connecting hole; 212. Annular sealing groove; 213. Receiving groove; 220. Inner cylinder; 221. Anchor; 222. Slot; 230. Corrosion-resistant inner lining metal plate; 231. Snap-fit ​​block; 240. Cavity; 250. Corrosion-resistant sealing strip; 300. Drain pipe; 310. Elastic rubber ring; 320. Sealing flange; 400. Cover; 410. Lock; 420. Silicone sealing ring. Detailed Implementation

[0035] To facilitate understanding of this utility model, the specific embodiments of this utility model will be described in more detail below with reference to the accompanying drawings.

[0036] Unless otherwise specified or defined, the terms "first," "second," etc., used in this document are for distinguishing names only and do not represent a specific number or order.

[0037] Unless otherwise stated or defined, the term “and / or” as used herein includes any and all combinations of one or more of the associated listed items.

[0038] It should be noted that in this article, "fixed to" or "connected to" can mean directly fixed to or connected to a component, or indirectly fixed to or connected to a component.

[0039] like Figure 1-3 As shown, the corrosion-resistant precast concrete inspection well provided in this embodiment includes a base 100, a cylinder 200 and a cover 400. The top of the base 100 is connected to the bottom of the cylinder 200, and the bottom of the cover 400 is connected to the top of the cylinder 200.

[0040] The cylinder 200 includes an outer cylinder 210 and an inner cylinder 220. The bottoms of both the outer cylinder 210 and the inner cylinder 220 are fixed to the base 100. A cavity 240 is formed between the outer cylinder 210 and the inner cylinder 220. The cavity 240 cooperates with the base 100 to form an annular water collection groove. A drain pipe 300 is provided on the outer cylinder 210. One end of the drain pipe 300 extends into the annular water collection groove to discharge the liquid in the annular water collection groove to the outside of the cylinder 200.

[0041] In some embodiments, the inner peripheral wall of the inner cylinder 220 is covered with a corrosion-resistant inner lining metal plate 230, and the corrosion-resistant inner lining metal plate 230 is detachably connected to the inner cylinder 220.

[0042] By covering the inner circumferential wall of the inner cylinder 220 with a corrosion-resistant inner lining metal plate 230, and the corrosion-resistant inner lining metal plate 230 and the inner cylinder 220 being detachably connected, the corrosion-resistant inner lining metal plate 230 directly bears the scouring and chemical corrosion of the medium, thus protecting the concrete of the inner cylinder 220. Even if the corrosion-resistant inner lining metal plate 230 is partially corroded, it can be removed and replaced, thus avoiding the overall scrapping of the cylinder 200.

[0043] In some embodiments, the inner wall of the inner cylinder 220 is pre-embedded with an anchor 221, the anchor 221 having a slot 222, and the bottom of the corrosion-resistant inner lining metal plate 230 is provided with a snap-fit ​​block 231, the snap-fit ​​block 231 being embedded in the slot 222, and the snap-fit ​​block 231 being fixed in the slot 222 by bolts.

[0044] By pre-embedding anchors 221 on the inner wall of the inner cylinder 220, and setting slots 222 on the anchors 221 for the snap-fit ​​blocks 231 at the bottom of the corrosion-resistant inner lining metal plate 230 to be embedded, and then using bolt structure to achieve fixation, the rapid positioning of the connection between the corrosion-resistant inner lining metal plate 230 and the inner cylinder 220 is improved, and the connection accuracy and connection stability are improved.

[0045] In some embodiments, the seams of the corrosion-resistant inner lining metal plate 230 are provided with corrosion-resistant sealing strips 250.

[0046] By installing corrosion-resistant sealing strips 250 at the joints of the corrosion-resistant inner lining metal plates 230, the gaps between the plates are filled to prevent corrosive media from seeping into the concrete joints. Furthermore, the corrosion-resistant sealing strips 250 utilize their own elasticity to adapt to the expansion and contraction of the inner lining plates caused by temperature changes, thus maintaining long-term sealing performance.

[0047] In some embodiments, the corrosion-resistant inner lining metal plate 230 is any one of stainless steel, duplex steel, or plastic composite plate.

[0048] By setting the corrosion-resistant inner lining metal plate 230 to any of stainless steel, duplex steel, or plastic composite plate, the material selection can be matched to different environments and working conditions in actual use.

[0049] In some embodiments, the outer peripheral wall of the drain pipe 300 is provided with an elastic rubber ring 310, the outer cylinder 210 is provided with a connecting hole 211 that connects to the cavity 240, and an annular sealing groove 212 is provided on the inner peripheral wall of the connecting hole 211. The elastic rubber ring 310 is embedded in the annular sealing groove 212 and seals with the annular sealing groove 212.

[0050] By setting an elastic rubber ring 310 on the outer peripheral wall of the drain pipe 300, the elastic rubber ring 310 is embedded in the annular sealing groove 212 of the connection hole 211 to achieve the seal between the drain pipe 300 and the outer cylinder 210, preventing liquid leakage in the annular water collection tank from corroding the outer cylinder 210. The elasticity of the elastic rubber ring 310 absorbs the vibration caused by foundation settlement or vehicle load, reducing the risk of cracking of the connection hole 211.

[0051] In some embodiments, the outer wall of the outer cylinder 210 is provided with a receiving groove 213, the inner peripheral wall of the receiving groove 213 is provided with a first thread, the outer wall of the drain pipe 300 is provided with a sealing flange 320, the outer peripheral wall of the sealing flange 320 is provided with a second thread, the sealing flange 320 is embedded in the receiving groove 213, and the second thread is screwed to the first thread.

[0052] By setting a receiving groove 213 on the outer wall of the outer cylinder 210 and a sealing flange 320 on the outer wall of the drain pipe 300, the second thread on the sealing flange 320 and the first thread on the inner circumferential wall of the receiving groove 213 are screwed together, and a double-layer seal is achieved in conjunction with the elastic rubber ring 310, thereby improving the sealing effect.

[0053] In some embodiments, the outer peripheral wall of the base 100 is provided with a hot-dip galvanized layer 110, and the outer peripheral wall of the hot-dip galvanized layer 110 is covered with an epoxy coating 120.

[0054] By setting a hot-dip galvanized layer 110 on the outer peripheral wall of the base 100 and covering the outer peripheral wall of the hot-dip galvanized layer 110 with an epoxy coating 120, the base 100 is isolated from moisture / oxygen, thus blocking the corrosion reaction chain. Furthermore, the hot-dip galvanized layer 110 is used as a sacrificial anode to protect the steel substrate and delay soil electrolytic corrosion.

[0055] In some embodiments, the base 100 is provided with a plurality of connecting rods 130 at its bottom, and an adjusting plate 140 is provided on the connecting rods 130. An anti-corrosion pad 150 is provided between the adjusting plate 140 and the base 100.

[0056] A connecting rod 130 is installed at the bottom of the base 100, and an adjusting plate 140 is installed on the connecting rod 130. The adjusting plate 140 compensates for uneven settlement of the foundation by adjusting the height on the connecting rod 130, thus preventing the well body from cracking and forming corrosion channels. An anti-corrosion pad 150 is installed between the adjusting plate 140 and the base 100 to block the rise of capillary water in the soil and protect the steel base 100.

[0057] In some embodiments, the cover 400 is provided with a plurality of latches 410, each latch 410 being locked to the outer wall of the cylinder 200, and a silicone sealing ring 420 is fixed to the bottom of the cover 400, the silicone sealing ring 420 being sealed to the top of the cylinder 200.

[0058] By setting several latches 410 on the cover 400, and using the locking engagement between the latches 410 and the top of the cylinder 200, the silicone sealing ring 420 fixed at the bottom of the cover 400 and the top of the cylinder 200 are sealed together, thus achieving a seal between the cover 400 and the cylinder 200, blocking the intrusion of corrosive gases such as hydrogen disulfide, and inhibiting the production of acid by microorganisms.

[0059] The corrosion-resistant precast concrete inspection well provided in this embodiment, compared with the prior art, is configured as a split base 100, cylinder 200 and cover 400. The cylinder 200 is configured as an outer cylinder 210 and an inner cylinder 220, with a cavity 240 formed between the outer cylinder 210 and the inner cylinder 220. The cavity 240, together with the base 100, forms an annular water collection tank. The liquid in the annular water collection tank is discharged to the outside of the cavity 240 by the drain pipe 300. On the one hand, acid / salt liquids that seep into the outer cylinder 210 are intercepted by the cavity 240 and enter the annular water collection tank and are discharged by the drain pipe 300, avoiding corrosion caused by corrosive liquids contacting the concrete of the inner cylinder 220. On the other hand, the humidity buffer area formed by the cavity 240 can reduce the erosion of the inner cylinder 220 by condensation. The drainage of the liquid in the annular water collection tank avoids structural damage caused by freeze-thaw expansion stress, thus improving the corrosion resistance of the inspection well.

[0060] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A corrosion-resistant precast concrete inspection well, characterized in that, It includes a base, a cylinder, and a cover, wherein the top of the base is connected to the bottom of the cylinder, and the bottom of the cover is connected to the top of the cylinder; The cylinder includes an outer cylinder and an inner cylinder. The bottoms of the outer cylinder and the inner cylinder are fixed to the base. A cavity is formed between the outer cylinder and the inner cylinder. The cavity and the base cooperate to form an annular water collection groove. A drain pipe is provided on the outer cylinder. One end of the drain pipe extends into the annular water collection groove to discharge the liquid in the annular water collection groove to the outside of the cylinder.

2. The corrosion-resistant precast concrete inspection well as described in claim 1, characterized in that, The inner circumferential wall of the inner cylinder is covered with a corrosion-resistant inner lining metal plate, which is detachably connected to the inner cylinder.

3. The corrosion-resistant precast concrete inspection well as described in claim 2, characterized in that, Anchors are pre-embedded in the inner wall of the inner cylinder, and slots are provided on the anchors. A snap-fit ​​block is provided at the bottom of the corrosion-resistant inner lining metal plate. The snap-fit ​​block is embedded in the slot and is fixed in the slot by bolts.

4. The corrosion-resistant precast concrete inspection well as described in claim 2, characterized in that, The joints of the corrosion-resistant inner lining metal plate are provided with corrosion-resistant sealing strips.

5. The corrosion-resistant precast concrete inspection well as described in claim 2, characterized in that, The corrosion-resistant inner lining metal plate is any one of stainless steel, duplex steel, or plastic composite plate.

6. The corrosion-resistant precast concrete inspection well as described in any one of claims 1-5, characterized in that, The outer peripheral wall of the drain pipe is provided with an elastic rubber ring, and the outer cylinder is provided with a connecting hole for conducting the cavity. An annular sealing groove is provided on the inner peripheral wall of the connecting hole, and the elastic rubber ring is embedded in the annular sealing groove and seals with the annular sealing groove.

7. The corrosion-resistant precast concrete inspection well as described in claim 6, characterized in that, The outer wall of the outer cylinder is provided with a receiving groove, the inner peripheral wall of the receiving groove is provided with a first thread, the outer wall of the drain pipe is provided with a sealing flange, the outer peripheral wall of the sealing flange is provided with a second thread, the sealing flange is embedded in the receiving groove, and the second thread is screwed to the first thread.

8. The corrosion-resistant precast concrete inspection well as described in any one of claims 1-5, characterized in that, The outer peripheral wall of the base is provided with a hot-dip galvanized layer, and the outer peripheral wall of the hot-dip galvanized layer is covered with an epoxy coating.

9. The corrosion-resistant precast concrete inspection well as described in claim 8, characterized in that, The base has several connecting rods at its bottom, and an adjusting plate is provided on the connecting rods. An anti-corrosion pad is provided between the adjusting plate and the base.

10. The corrosion-resistant precast concrete inspection well according to any one of claims 1-5, characterized in that, The cover is provided with several latches, each latch locking into the outer wall of the cylinder. A silicone sealing ring is fixed at the bottom of the cover, and the silicone sealing ring seals against the top of the cylinder.

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