Acid and alkali corrosion resistant reinforced concrete inspection well for factory

Abstract

The utility model relates to the technical field of factory inspection wells, in particular to an acid and alkali corrosion resistant reinforced concrete inspection well for factories, which comprises a base, a top plate and a well lid, the top plate is fixedly mounted above the base, the well lid is movably clamped above the top plate, and an inspection well steel plate corrosion resistant structure is arranged on the inner side of the base. The steel plate corrosion-resistant structure of the inspection well comprises a well seat, a corrosion-resistant side plate and a corrosion-resistant bottom plate, wherein the well seat is fixedly mounted on the inner side of the base. According to the acid-alkali-corrosion-resistant reinforced concrete inspection well for the factory, when the acid-alkali-corrosion-resistant reinforced concrete inspection well for the factory is installed, the corrosion-resistant side plates and the corrosion-resistant bottom plate which are machined in advance are combined and embedded into the well base, bolts are tightened through an instrument to lock the corrosion-resistant side plates and the connecting pieces, the well lid is turned over to loosen the bolts when the inspection well needs to be replaced, and the corrosion-resistant bottom plate and the corrosion-resistant side plates are installed. The anti-corrosion side plates and the anti-corrosion bottom plate at the lower end can be taken out upwards from the well base, and the using effect of the acid and alkali corrosion resistant reinforced concrete inspection well for the factory is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of factory inspection wells, in particular to an acid and alkali corrosion resistant reinforced concrete inspection well for factories. Background Art

[0002] Inspection wells are set up for the maintenance of urban underground infrastructure such as power supply, water supply, drainage, sewage, communications, cable TV, gas pipes, and street lamp lines. They are easy to install. Inspection wells are buried plastic drainage pipes within the building area with an outer diameter of no more than 800mm and a buried depth of no more than 6m. They are generally located at the intersection of drainage pipes, turns, places where the pipe diameter or slope changes, waterfalls, etc., in order to facilitate regular inspection, cleaning and dredging or down-well operation inspection. They are plastic one-piece injection molded or brick-built well-shaped structures.

[0003] For example, the authorization announcement number "CN211340856U" is named as an inspection well. Although the splicing rings that can be spliced ​​together form a caisson, the probability of the caisson tilting can be reduced, and the positioning notch and the positioning plate can play a positioning role, which is convenient for the splicing of the splicing rings. The positioning notch can also serve as an exit when the excavation depth is shallow. However, when the existing inspection wells are used in factories, they need to frequently store and flow through industrial wastewater with high acid and alkali content discharged after factory processing. Because the content of acidic or alkaline substances in the industrial wastewater exceeds the standard, it will cause more serious corrosion damage to the contact part of the inner wall of the inspection well, causing wastewater leakage and environmental pollution. At present, for the inspection wells used in factories, prefabricated corrosion-resistant metal plates are generally installed on the inner wall of the inspection well to improve the corrosion resistance. However, when the corrosion-resistant metal plates are disassembled, it is necessary to manually cut off the welding points before the metal plates can be disassembled and replaced. Not only are the steps cumbersome and troublesome, but the staff also need to enter the inspection well to operate, which is very dangerous. Therefore, the actual use effect of the existing inspection wells is relatively poor.

[0004] At the same time, the existing inspection wells have a road at the top of the wellhead that is convenient for walking and inspection personnel to pass, and the manhole cover of the inspection well is only fixed by the well seat around it. Therefore, it lacks a safer auxiliary fixing structure. After the manhole cover has been used for a long time, there will be wear and tear on the edge and the connection position between the inspection well. Therefore, the fixation of the manhole cover above the inspection well will not be very firm. When pedestrians step on the manhole cover, it is easy to fall into the inspection well. Since there will be acidic and alkaline industrial wastewater in the inspection well, it is extremely harmful to the human body. Therefore, the safety of the existing inspection wells is relatively low. Utility Model Content

[0005] The utility model aims to solve the problems of poor use effect and low use safety of inspection wells, and proposes an acid and alkali corrosion resistant reinforced concrete inspection well for factories.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an acid- and alkali-resistant reinforced concrete inspection well for use in a factory, comprising a base, a top plate and a well cover, wherein the top plate is fixedly mounted on the top of the base, and the well cover is movably clamped on the top of the top plate, and a steel plate corrosion-resistant structure for the inspection well is provided on the inner side of the base, and the steel plate corrosion-resistant structure for the inspection well comprises a well seat, corrosion-resistant side plates and a corrosion-resistant bottom plate, the well seat is fixedly mounted on the inner side of the base, and the corrosion-resistant side plates are movably clamped on the inner wall of the well seat, and a corrosion-resistant bottom plate is fixedly mounted on the lower end of the corrosion-resistant side plate, and the bottom of the corrosion-resistant bottom plate is movably connected to the inner bottom end of the well seat, and two through holes are fixedly opened inside the corrosion-resistant side plate, and the inner sides of the two through holes are connected to the interior of the well seat.

[0007] Preferably, a water inlet pipe is fixedly connected to one side of the well seat, the inner side of which is communicated with the through hole, and a water outlet pipe is fixedly connected to the other side of the well seat, the other side of which is communicated with the through hole.

[0008] Preferably, a corrosion-resistant structure support replacement structure for the inspection well is provided on the inner side of the manhole cover;

[0009] The inspection well corrosion-resistant structure support replacement structure includes a connecting plate, a supporting rod and a connecting piece;

[0010] The two connecting plates are fixedly installed on the inner wall of the manhole cover, and support rods are fixedly installed on the lower ends of the two connecting plates. Two connecting plates are fixedly installed on the lower ends of the two support rods. One side of the two connecting plates is movably connected to the upper inner wall of the well seat. The inner sides of the two connecting plates are threadedly connected with bolts, and the ends of the two bolts are threadedly connected to the inner wall of the well seat, and the outer sides of the two bolts are threadedly connected to the top ends of the corrosion-resistant side plates.

[0011] Preferably, a manhole cover safety fixing structure is provided above the top plate;

[0012] The manhole cover safety fixing structure comprises a slide groove, an elastic plate and a clamping column;

[0013] The two slide grooves are fixedly opened on both sides above the top plate, the inner sides of the two slide grooves are slidably connected with clamping columns, the ends of the two clamping columns are movably clamped with the inner sides of the manhole cover, the top ends of the two clamping columns are fixedly installed with pushing heads, the two elastic plates are fixedly installed on the inner ends of the slide grooves, and the front ends of the two elastic plates are movably connected with the rear sides of the clamping columns.

[0014] Preferably, a safety inspection structure is provided inside the manhole cover;

[0015] The safety inspection structure includes a protective cover plate, tempered glass and a rotating shaft;

[0016] The rotating shaft is rotatably connected to the upper side of the manhole cover through a bearing, a protective cover plate is fixedly connected to the upper side of the rotating shaft, the tempered glass is fixedly installed inside the manhole cover, and the inner side of the protective cover plate is rotatably connected to the top of the tempered glass.

[0017] Preferably, the lower end of the tempered glass is arranged opposite to the upper side of the corrosion-resistant bottom plate, and the ends of the two connecting plates are movably connected to the edges of the tempered glass.

[0018] The utility model proposes an acid and alkali corrosion resistant reinforced concrete inspection well for factory use, which has the beneficial effect that: when installing the acid and alkali corrosion resistant reinforced concrete inspection well for factory use, the corrosion resistant side plate and the corrosion resistant bottom plate combination processed in advance are embedded into the well seat, and then the two through holes are connected with the outlet pipe and the inlet pipe, and the anti-corrosion side plate and the connecting plate are locked by tightening the bolts with an instrument. When replacement is needed, the well cover is opened and the bolts are loosened, and the anti-corrosion side plate together with the lower end corrosion resistant bottom plate can be taken out upward in the well seat, thereby improving the use effect of the acid and alkali corrosion resistant reinforced concrete inspection well for factory use.

[0019] The bending of the elastic sheet can provide the clamping column with a forward driving force. The operator first pushes the two pushing heads backward and then places the manhole cover inside the reserved groove on the inner side of the top plate. The compressed elastic plate will push the clamping column forward and insert it into the side wall of the manhole cover. The safe and stable manhole cover fixing structure is utilized, and there is no need to open the manhole cover to know the internal situation of the inspection well, which improves the safety of the acid and alkali corrosion-resistant reinforced concrete inspection wells used in factories. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0021] Figure 2 for Figure 1 A front cross-sectional schematic diagram of

[0022] Figure 3 for Figure 1 A schematic cross-sectional view of the top surface;

[0023] Figure 4 for Figure 2 Enlarged cross-sectional view of part A in the middle;

[0024] Figure 5 for Figure 2 Enlarged cross-sectional view of part B in the middle;

[0025] Figure 6 for Figure 2 Enlarged cross-sectional view of part C.

[0026] In the figure: 1. base, 2. top plate, 3. manhole cover, 4. water inlet pipe, 5. water outlet pipe, 6. corrosion-resistant steel plate structure of the inspection well, 61. well seat, 62. corrosion-resistant side plate, 63. corrosion-resistant bottom plate, 64. through hole, 7. corrosion-resistant structure support replacement structure of the inspection well, 71. connecting plate, 72. support rod, 73. connecting piece, 74. bolt, 8. manhole cover safety fixing structure, 81. slide groove, 82. elastic plate, 83. push head, 84. clamping column, 9. safety inspection structure, 91. protective cover plate, 92. tempered glass, 93. rotating shaft. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] See also Figure 1-6A factory-used acid- and alkali-resistant reinforced concrete inspection well comprises a base 1, a top plate 2 and a well cover 3. The top plate 2 is fixedly mounted above the base 1, and the well cover 3 is movably connected to the top of the top plate 2. An inspection well steel plate corrosion-resistant structure 6 is provided on the inner side of the base 1. The inspection well steel plate corrosion-resistant structure 6 comprises a well seat 61, corrosion-resistant side plates 62 and a corrosion-resistant bottom plate 63. The well seat 61 is fixedly mounted on the inner side of the base 1. The well seat 61 adopts a cast reinforced concrete structure fixed inside the base 1. The corrosion-resistant side plates 62 are movably connected to the inner wall of the well seat 61. The lower end of the corrosion-resistant side plates 62 is fixedly mounted with a corrosion-resistant bottom plate 63. The corrosion-resistant bottom plate 63 and the corrosion-resistant side plate 62 are both made of highly corrosion-resistant stainless steel metal plates. The corrosion-resistant bottom plate 63 is fixed to the inner side of the lower end of the corrosion-resistant side plate 62 by welding. The corrosion-resistant side plate 62 is bent and processed into a straight cylindrical structure that matches the size of the inner wall of the well seat 61. The bottom of the corrosion-resistant bottom plate 63 is movably connected to the inner bottom end of the well seat 61. Two through holes 64 are fixedly opened inside the corrosion-resistant side plate 62. The inner sides of the two through holes 64 are connected to the inside of the well seat 61. When installing the acid- and alkali-resistant reinforced concrete inspection well in the factory, the corrosion-resistant side plate 62 and the corrosion-resistant bottom plate 63 processed in advance are combined and embedded into the well seat 61. , and then make the two through holes connected with the outlet pipe 5 and the inlet pipe 4. The inner side of the manhole cover 3 is provided with a manhole corrosion resistant structure support replacement structure 7. The manhole corrosion resistant structure support replacement structure 7 includes a connecting plate 71, a support rod 72 and a connecting piece 73. The two connecting plates 71 are fixedly installed on the inner wall of the manhole cover 3. The connecting plate 71 is used to support the manhole cover 3 at the top of the well seat 61 to prevent the manhole cover 3 from falling into the well seat 61. The lower ends of the two connecting plates 71 are fixedly installed with support rods 72. The support rods 72 are connected between the connecting rods 71 ​​and the lower end connecting piece 73 at a forty-five degree angle, providing a connecting plate 7 1 The supporting force is obliquely upward. Two connecting pieces 73 are fixedly installed at the lower ends of the two supporting rods 72. One side of the two connecting pieces 73 is movably connected to the upper inner wall of the well seat 61. After the processed corrosion-resistant side plate 62 and the corrosion-resistant bottom plate 63 are combined and embedded into the well seat 61, the connecting piece 73 is placed between the top of the corrosion-resistant side plate 62 and the well seat 61. The anti-corrosion side plate 62 and the connecting piece 73 are locked by tightening the bolts 74 with instruments. The inner sides of the two connecting pieces 73 are threadedly connected with the bolts 74. The ends of the two bolts 74 are threadedly connected to the inner wall of the well seat 61, and the outer sides of the two bolts 74 are threadedly connected to the top of the corrosion-resistant side plate 62.

[0029] The corrosion-resistant bottom plate 63 and the corrosion-resistant side plate 62 are both made of highly corrosion-resistant stainless steel metal plates. The corrosion-resistant bottom plate 63 is fixed to the inner side of the lower end of the corrosion-resistant side plate 62 by welding. The corrosion-resistant side plate 62 is bent into a straight cylindrical structure that matches the size of the inner wall of the well seat 61. When installing the factory-made acid and alkali corrosion-resistant reinforced concrete inspection well, the pre-processed corrosion-resistant side plate 62 and the corrosion-resistant bottom plate 63 are combined and embedded into the well seat 61, and then the two through holes are connected to the water outlet pipe 5 and the water inlet pipe 4. After the processed corrosion-resistant side plate 62 and the corrosion-resistant bottom plate 63 are combined and embedded into the well seat 61, the connecting piece 73 is placed between the top of the corrosion-resistant side plate 62 and the well seat 61. The bolts 74 are tightened by an instrument to lock the anti-corrosion side plate 62 and the connecting plate 73. The connecting plate 71 is used to support the manhole cover 3 at the top of the well seat 61 to prevent the manhole cover 3 from falling into the well seat 61. The support rod 72 is connected between the connecting rod 71 and the lower connecting plate 73 at a forty-five degree angle to provide support force at the upper side of the connecting plate 71. A prefabricated integral acid and alkali corrosion-resistant structure that can be embedded in the well seat is utilized. When replacement is needed, the manhole cover 3 is turned over and the bolts 74 are loosened. The anti-corrosion side plate 62 together with the lower corrosion-resistant bottom plate 63 can be taken out upward in the well seat 61, and then replaced and installed in the same way, thereby improving the use effect of the acid and alkali corrosion-resistant reinforced concrete inspection wells used in factories.

[0030] See also Figure 1-6A manhole cover safety fixing structure 8 is provided above the top plate 2. The manhole cover safety fixing structure 8 includes a slide groove 81, an elastic plate 82 and a clamping column 84. The two slide grooves 81 are fixedly opened on both sides of the top plate 2. The inner sides of the two slide grooves 81 are slidably connected with the clamping columns 84. The ends of the two clamping columns 84 are movably clamped with the inner sides of the manhole cover 3. The top ends of the two clamping columns 84 are fixedly installed with a pushing head 83. The two elastic plates 82 are fixedly installed on the inner ends of the slide grooves 81. The front ends of the two elastic plates 82 The end is movably connected to the rear side of the clamping column 84. The elastic plate 82 is made of a soft steel sheet with a certain curvature. The bending of the elastic sheet 82 can provide a driving force for the clamping column 84 to move forward. When installing the manhole cover 3, the operator first pushes the two pushing heads 83 backward to move. The pushing heads 83 will compress the elastic plate 82 to bend and accumulate kinetic energy, and then cover the manhole cover 3 inside the reserved groove on the inner side of the top plate 2. After that, the pushing head 83 is released, and the compressed elastic plate 82 will push the clamping column 84 forward to insert into the manhole cover 3, and then the top plate 2 and the manhole cover 3 are fixedly locked by the clamping column 84 to prevent the manhole cover 3 from being loosened after a long time of use. A safety inspection structure 9 is arranged inside the manhole cover 3, and the safety inspection structure 9 includes a protective cover plate 91, a tempered glass 92 and a rotating shaft 93. The rotating shaft 93 is rotatably connected to the upper side of the manhole cover 3 through a bearing, and a protective cover plate 91 is fixedly connected above the rotating shaft 93. The protective cover plate 91 is made of a wear-resistant and relatively strong aluminum alloy metal plate. One end of the protective cover plate 91 can be rotated above the manhole cover 3 along the rotating shaft 93. At ordinary times, the protective cover plate 91 will block the top of the tempered glass 92. When the operator needs to observe the wastewater situation inside the inspection well, he only needs to rotate the protective cover plate 91 to observe the internal situation of the inspection well through the transparent tempered glass 92, and it can be achieved without opening the manhole cover 3. The tempered glass 92 is fixedly installed inside the manhole cover 3, and the inner side of the protective cover plate 91 is rotatably connected to the top of the tempered glass 92;

[0031] The elastic plate 82 is made of a soft steel sheet with a certain curvature. The bending of the elastic plate 82 can provide a driving force for the clamping column 84 to push forward. When installing the manhole cover 3, the operator first pushes the two pushing heads 83 backward to move. The pushing heads 83 will compress the elastic plate 82 to bend and accumulate kinetic energy. Then, the manhole cover 3 is covered in the reserved groove on the inner side of the top plate 2. After that, the pushing heads 83 are released. The compressed elastic plate 82 will push the clamping column 84 forward to insert into the side wall of the manhole cover 3. Then, the clamping column 84 is used to fix and lock the top plate 2 and the manhole cover 3 to prevent the manhole cover 3 from loosening after a long time of use. The protective cover plate 91 adopts It is made of a wear-resistant and strong aluminum alloy metal plate. One end of the protective cover 91 can rotate along the rotating shaft 93 above the manhole cover 3. Normally, the protective cover 91 will block the top of the tempered glass 92. When the operator needs to observe the wastewater situation inside the inspection well, he only needs to rotate the protective cover 91 to observe the internal situation of the inspection well through the transparent tempered glass 92. It does not need to open the manhole cover 3. It uses a safe and stable manhole cover fixing structure, and there is no need to open the manhole cover to know the internal situation of the inspection well, which improves the safety of the use of acid and alkali corrosion-resistant reinforced concrete inspection wells in factories.

[0032] See also Figure 1-6 A water inlet pipe 4 is fixedly connected to one side of the well seat 61, and the water inlet pipe 4 is connected to the factory drainage pipe, so that corrosive acid and alkali wastewater can enter the inspection well seat 61. The inner side of the water inlet pipe 4 is connected to the through hole 64. A water outlet pipe 5 is fixedly connected to the other side of the well seat 61. The wastewater temporarily stored in the inspection well seat 61 will be discharged along the water outlet pipe 4 when it accumulates to a certain height. The other side of the water outlet pipe 5 is connected to the through hole 64. The lower end of the tempered glass 92 is arranged opposite to the upper side of the corrosion-resistant bottom plate 63, and the ends of the two connecting plates 71 are movably connected to the edges of the tempered glass 92.

[0033] Working principle:

[0034] When the reinforced concrete inspection well in the factory needs to temporarily store wastewater with high acid and alkali content:

[0035] Installation process of anti-corrosion structure:

[0036] First, the corrosion-resistant bottom plate 63 and the corrosion-resistant side plate 62 are both made of highly corrosion-resistant stainless steel metal plates. The corrosion-resistant bottom plate 63 is fixed to the inner side of the lower end of the corrosion-resistant side plate 62 by welding. The corrosion-resistant side plate 62 is bent and processed into a straight cylindrical structure that matches the size of the inner wall of the well seat 61. When installing the acid- and alkali-resistant reinforced concrete inspection well in the factory, the pre-processed corrosion-resistant side plate 62 and the corrosion-resistant bottom plate 63 are combined and embedded into the well seat 61, and then the two through holes are connected to the outlet pipe 5 and the inlet pipe 4;

[0037] After the processed corrosion-resistant side plate 62 and corrosion-resistant bottom plate 63 are combined and embedded in the well seat 61, the connecting piece 73 is placed between the top of the corrosion-resistant side plate 62 and the well seat 61, and the anti-corrosion side plate 62 and the connecting piece 73 are locked by tightening the bolts 74 with an instrument. The connecting plate 71 is used to support the manhole cover 3 at the top of the well seat 61 to prevent the manhole cover 3 from falling into the well seat 61. The support rod 72 is connected between the connecting rod 71 and the lower end connecting piece 73 at a forty-five degree angle to provide a supporting force obliquely above the connecting plate 71, and utilizes a prefabricated integral acid and alkali corrosion-resistant structure that can be embedded in the well seat. When replacement is needed, the manhole cover 3 is turned over and the bolts 74 are loosened, so that the anti-corrosion side plate 62 together with the lower end corrosion-resistant bottom plate 63 can be taken out upward in the well seat 61, and then the anti-corrosion side plate 62 and the corrosion-resistant bottom plate 63 can be replaced and installed in the same way;

[0038] Inspection well safety use structure:

[0039] The elastic plate 82 is made of a soft steel sheet with a certain curvature. The bending of the elastic plate 82 can provide a driving force for the clamping column 84 to push forward. When installing the manhole cover 3, the operator first pushes the two pushing heads 83 backward to move. The pushing heads 83 will compress the elastic plate 82 to bend and accumulate kinetic energy. Then, the manhole cover 3 is covered inside the reserved groove on the inner side of the top plate 2. After that, the pushing heads 83 are released. The compressed elastic plate 82 will push the clamping column 84 forward to insert into the side wall of the manhole cover 3. Then, the clamping column 84 is used to fix and lock the top plate 2 and the manhole cover 3 to prevent the manhole cover 3 from being easily loosened after a long period of use.

[0040] Then the protective cover 91 is made of a wear-resistant and relatively strong aluminum alloy metal plate. One end of the protective cover 91 can rotate along the rotating shaft 93 above the manhole cover 3. Normally, the protective cover 91 will block the top of the tempered glass 92. When the operator needs to observe the wastewater situation inside the inspection well, he only needs to rotate the protective cover 91 to observe the internal situation of the inspection well through the transparent tempered glass 92, and there is no need to open the manhole cover 3.

[0041] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A factory-use acid and alkali corrosion-resistant reinforced concrete inspection well, comprising a base (1), a top plate (2) and a well cover (3), characterized in that: The top plate (2) is fixedly mounted on the top of the base (1); a manhole cover (3) is movably connected to the top of the top plate (2); a steel plate corrosion resistant structure (6) for the inspection well is provided on the inner side of the base (1); the steel plate corrosion resistant structure (6) for the inspection well comprises a well seat (61), corrosion resistant side plates (62) and a corrosion resistant bottom plate (63); the well seat (61) is fixedly mounted on the inner side of the base (1); the corrosion resistant side plates (62) are movably connected to the inner wall of the well seat (61); the corrosion resistant bottom plate (63) is fixedly mounted on the lower end of the corrosion resistant side plates (62); the lower end of the corrosion resistant bottom plate (63) is movably connected to the inner bottom end of the well seat (61); two through holes (64) are fixedly opened inside the corrosion resistant side plates (62); the inner sides of the two through holes (64) are connected to the inside of the well seat (61).

2. The acid and alkali corrosion resistant reinforced concrete inspection well for factory use according to claim 1 is characterized by: A water inlet pipe (4) is fixedly connected to one side of the well seat (61), and the inner side of the water inlet pipe (4) is connected to the through hole (64). A water outlet pipe (5) is fixedly connected to the other side of the well seat (61), and the other side of the water outlet pipe (5) is connected to the through hole (64).

3. The acid- and alkali-resistant reinforced concrete inspection well for factory use according to claim 1 is characterized by: The inner side of the manhole cover (3) is provided with a corrosion-resistant structure support replacement structure (7) for the inspection well; The inspection well corrosion-resistant structure support replacement structure (7) comprises a connecting plate (71), a supporting rod (72) and a connecting piece (73); The two connecting plates (71) are fixedly mounted on the inner wall of the manhole cover (3); support rods (72) are fixedly mounted on the lower ends of the two connecting plates (71); two connecting plates (73) are fixedly mounted on the lower ends of the two supporting rods (72); one side of the two connecting plates (73) is movably connected to the upper inner wall of the manhole seat (61); bolts (74) are threadedly connected to the inner sides of the two connecting plates (73); ends of the two bolts (74) are threadedly connected to the inner wall of the manhole seat (61); and outer sides of the two bolts (74) are threadedly connected to the top ends of the corrosion-resistant side plates (62).

4. The acid and alkali corrosion resistant reinforced concrete inspection well for factory use according to claim 3 is characterized by: A manhole cover safety fixing structure (8) is provided above the top plate (2); The manhole cover safety fixing structure (8) comprises a slide groove (81), an elastic plate (82) and a clamping column (84); The two slide grooves (81) are fixedly opened on both sides above the top plate (2); the inner sides of the two slide grooves (81) are slidably connected with a clamping column (84); the ends of the two clamping columns (84) are movably clamped with the inside of the two sides of the manhole cover (3); the top ends of the two clamping columns (84) are fixedly installed with a pushing head (83); the two elastic plates (82) are fixedly installed on the inner ends of the slide grooves (81); the front ends of the two elastic plates (82) are movably connected with the rear sides of the clamping columns (84).

5. The acid-alkali corrosion-resistant reinforced concrete inspection well for factory use according to claim 4 is characterized by: A safety inspection structure (9) is provided inside the manhole cover (3); The safety inspection structure (9) comprises a protective cover plate (91), tempered glass (92) and a rotating shaft (93); The rotating shaft (93) is rotatably connected to one side of the top of the manhole cover (3) via a bearing, a protective cover plate (91) is fixedly connected to the top of the rotating shaft (93), the tempered glass (92) is fixedly installed inside the manhole cover (3), and the inner side of the protective cover plate (91) is rotatably connected to the top of the tempered glass (92).

6. The acid and alkali corrosion resistant reinforced concrete inspection well for factory use according to claim 5, characterized in that: The lower end of the tempered glass (92) is arranged opposite to the upper side of the corrosion-resistant bottom plate (63), and the ends of the two connecting plates (71) are movably connected to the edges of the tempered glass (92).

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