Double-layer sealed heat insulation type manhole door

Abstract

The double-layer sealed heat insulation type manhole door comprises an outer frame body and an inner frame body, an outer fixing frame is arranged outside an opening in the top of the outer frame body, and the outer frame body and the inner frame body are connected through an inner fixing frame; an outer door and an inner door which can be opened and closed are respectively arranged at the top opening of the outer frame body and the top opening of the inner frame body; the hollow structures of the outer door and the inner door are filled with corrosion-resistant filler and high-temperature-resistant filler respectively; annular sealing grooves are formed in the outer frame body, the inner frame body, the outer door and the bottom end of the inner door, and sealing rings are installed in the sealing grooves. A plurality of lock plates are arranged on the outer edge of the outer door and the outer edge of the inner door, lock rods corresponding to the lock plates are hinged to the outer fixing frame and the inner fixing frame respectively, lock nuts are arranged on the lock rods in a rotating mode, the lock rods can be embedded into U-shaped grooves of the lock plates, and the outer door and the inner door are locked by screwing the lock nuts. The manhole door is excellent in heat insulation performance and sealing performance, and safe operation of equipment in high-temperature and high-pressure environments is ensured.

Description

Technical Field

[0001] The utility model relates to a double-layer sealed heat-insulating manhole door, belonging to the technical field of manhole doors. Background Art

[0002] In industrial production, many equipments need regular inspection and maintenance. In order to facilitate operators to enter the equipment, manhole doors are usually installed on the equipment. However, traditional manhole doors have problems such as poor thermal insulation and poor sealing performance under high temperature and high pressure environments, which can easily lead to energy loss and safety hazards. Therefore, it is particularly important to develop a manhole door device with good thermal insulation and sealing performance. Utility Model Content

[0003] The utility model aims to provide a double-layer sealed heat-insulating manhole door, which improves the heat-insulating performance and sealing performance of the manhole door by optimizing the structural design, thereby ensuring the safe operation of the equipment under high temperature and high pressure environment.

[0004] The technical solution adopted by the utility model is:

[0005] A double-layer sealed heat-insulating manhole door comprises an outer frame, an outer fixing frame is arranged outside the top opening of the outer frame, an inner fixing frame is arranged inside the outer frame below the outer fixing frame, and an inner frame is arranged inside the inner fixing frame;

[0006] An outer door and an inner door that can be opened and closed are respectively arranged at the top opening of the outer frame and the top opening of the inner frame, and one side of the outer door and the inner door are respectively hinged to the outer fixed frame and the inner fixed frame; the outer door and the inner door are both hollow structures, and the hollow structures of the outer door and the inner door are respectively filled with corrosion-resistant fillers and high-temperature-resistant fillers;

[0007] The bottom ends of the outer door and the inner door are embedded in the outer frame and the inner frame, and an annular sealing groove is provided in the outer frame, the inner frame and the bottom ends of the outer door and the inner door, and a sealing ring is installed in the sealing groove;

[0008] A plurality of lock plates with U-shaped grooves at the ends are arranged on the outer edges of the outer door and the inner door, and lock rods corresponding to the lock plates are hingedly arranged on the outer fixed frame and the inner fixed frame respectively, and lock nuts are screwed on the lock rods. The lock rods can be embedded in the U-shaped grooves of the lock plates and the outer door and the inner door can be locked by tightening the lock nuts.

[0009] Preferably, a containing space is formed between the bottom of the outer frame and the inner fixed frame and inner frame on the corresponding side, the containing space is filled with heat insulating filler, and a sealing plate for closing the containing space is provided between the outer frame and the inner frame on the corresponding side.

[0010] Preferably, the thermal insulation filler is ceramic fiber and / or aluminum silicate fiber.

[0011] Preferably, a lock leaf is provided on the side of the outer door that is not hinged to the outer fixing frame, and a lock nose is provided on the outer fixing frame. After the lock leaf is buckled with the lock nose, it is locked with a padlock.

[0012] Preferably, a handle is also provided on the top of one side of the outer door and the inner door which is not hinged to the outer fixing frame and the inner fixing frame.

[0013] Preferably, the locking rod has an annular end and a screw rod arranged on the annular end, and the locking nut is screwed on the screw rod;

[0014] The outer fixing frame and the inner fixing frame are respectively provided with hinge seats, the annular end of the locking rod is embedded in the hinge seat and is installed on the hinge seat through a bolt assembly and is rotatably arranged relative to the hinge seat.

[0015] Preferably, a gasket is sleeved on the screw rod below the lock nut.

[0016] Preferably, the sealing rings on the outer door and the inner door are respectively located above the sealing rings on the outer frame and the inner frame.

[0017] The beneficial effects of the utility model are:

[0018] A double-layer door panel structure is adopted and heat-insulating fillers are filled in the accommodating space to improve the heat insulation performance of the manhole door. At the same time, corrosion-resistant fillers and high-temperature resistant fillers are respectively filled in the hollow structures of the outer door and the inner door, thereby improving the corrosion resistance and high-temperature resistance of the manhole door. Furthermore, double-layer sealing rings are used to seal the outer door, the inner door and the outer frame, and the inner frame, and the outer door and the inner door are locked by the cooperation of locking rods, locking plates and lock nuts, thereby ensuring the sealing effect of the manhole door. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A top view of the manhole door;

[0020] Figure 2 This is a top view of the inner door;

[0021] Figure 3 A cross-sectional view of a manhole door;

[0022] Figure 4 It is a schematic diagram of the structure of the locking rod.

[0023] The main reference numerals in the figure have the following meanings:

[0024] 1. Outer frame, 2. Outer fixed frame, 3. Inner fixed frame, 4. Inner frame, 5. Outer door, 6. Inner door, 7. Lock leaf, 8. Lock nose, 9. Handle, 10. Lock plate, 11. Lock rod, 12. Ring end, 13. Screw, 14. Lock nut, 15. Sealing plate, 16. Corrosion-resistant filler, 17. High-temperature resistant filler, 18. Heat-insulating filler. DETAILED DESCRIPTION

[0025] The utility model is specifically introduced below in conjunction with the accompanying drawings and embodiments.

[0026] like Figure 1-4 As shown: This embodiment is a double-layer sealed heat-insulating manhole door, comprising an outer frame 1, an outer fixed frame 2 is arranged outside the top opening of the outer frame 1, an inner fixed frame 3 is arranged inside the outer frame 1 below the outer fixed frame 2, and an inner frame 4 is arranged inside the inner fixed frame 3; an openable outer door 5 and an inner door 6 are respectively arranged at the top opening of the outer frame 1 and the top opening of the inner frame 4, and one side of the outer door 5 and the inner door 6 are respectively hinged to the outer fixed frame 2 and the inner fixed frame 3. A lock leaf 7 is arranged on the side of the outer door 5 that is not hinged to the outer fixed frame 2, and a lock nose 8 is arranged on the outer fixed frame 2. After the lock leaf 7 is buckled with the lock nose 8, it is locked with a padlock. A handle 9 is also arranged on the top of the side of the outer door 5 and the inner door 6 that are not hinged to the outer fixed frame 2 and the inner fixed frame 3. The outer door 5 (stainless steel) and the inner door 6 (high temperature alloy steel) are both hollow structures, and the hollow structures of the outer door 5 and the inner door 6 are respectively filled with corrosion-resistant fillers 16 and high temperature-resistant fillers 17. The double-layer door panel structure improves the heat insulation performance of the manhole door, and the corrosion-resistant fillers 16 and high temperature-resistant fillers 17 respectively filled in the hollow structures of the outer door 5 and the inner door 6 can also improve the corrosion resistance and high temperature resistance of the manhole door.

[0027] In actual application, the manhole door can be installed on the equipment by bolts through the installation holes opened on the outer fixing frame 2; or the outer fixing frame 2 can be connected to the equipment by welding and then the manhole door can be fixed on the equipment. At the same time, in order to improve the strength of the outer door 5 and the inner door 6, a plurality of reinforcing ribs can be provided on the outer door 5 and the inner door 6. The corrosion-resistant filler 16 and the high-temperature resistant filler 17 can also be made of aluminum silicate fiber, which has the excellent properties of aluminum silicate fiber, and has corrosion resistance and high temperature resistance, and also has heat insulation performance.

[0028] The bottom ends of the outer door 5 and the inner door 6 are embedded in the outer frame 1 and the inner frame 4. Annular sealing grooves are provided in the outer frame 1, the inner frame 4 and the bottom ends of the outer door 5 and the inner door 6, and sealing rings are installed in the sealing grooves. The sealing rings on the outer door 5 and the inner door 6 are respectively located above the sealing rings on the outer frame 1 and the inner frame 4. In actual application, the sealing rings on the outer door 5 and the outer frame 1 are made of corrosion-resistant rubber material, and the sealing rings on the inner door 6 and the inner frame 4 are made of high-temperature resistant rubber material.

[0029] A plurality of lock plates 10 with U-shaped grooves at the ends are arranged on the outer edges of the outer door 5 and the inner door 6, and lock rods 11 corresponding to the lock plates 10 are hingedly arranged on the outer fixing frame 2 and the inner fixing frame 3, respectively. The lock rod 11 has an annular end 12 and a screw 13 arranged on the annular end 12, a lock nut 14 is screwed on the screw 13, and a gasket is sleeved on the screw 13 located below the lock nut 14; specifically, a hinge seat is arranged on the outer fixing frame 2 and the inner fixing frame 3, respectively, the annular end 12 of the lock rod 11 is embedded in the hinge seat and is installed on the hinge seat by a bolt assembly and is rotatably arranged relative to the hinge seat. After the outer door 5 and the inner door 6 are covered, the rod body of the screw 13 is embedded in the U-shaped groove of the lock plate 10 by rotating the screw 13, and then the lock nut 14 is tightened downward to make the gasket abut against the outer door 5 and the inner door 6 to achieve locking of the outer door 5 and the inner door 6, so as to ensure the sealing effect and prevent leakage of gas or liquid.

[0030] In order to further improve the heat insulation effect of the manhole door, an accommodating space is formed between the bottom of the outer frame 1 and the inner fixed frame 3 and the inner frame 4 on the corresponding side. The accommodating space is filled with a heat insulating filler 18, and the heat insulating filler 18 is ceramic fiber and / or aluminum silicate fiber. A sealing plate 15 for enclosing the accommodating space is provided between the outer frame 1 and the inner frame 4 on the corresponding side.

[0031] The double-layer structure design and the filling of thermal insulation filler of the manhole door can effectively improve the thermal insulation performance and reduce energy loss; at the same time, the sealing ring and the locking rod, lock plate, lock nut cooperate with the locking method of the outer door and the inner door to further improve the sealing performance of the manhole door and prevent the leakage of high-temperature gas or liquid; the manhole door is suitable for various industrial equipment in high-temperature and high-pressure environments, such as boilers, reactors and storage tanks.

[0032] The above is only a preferred implementation of the utility model patent. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model patent. These improvements and modifications should also be regarded as the protection scope of the utility model patent.

Claims

1. A double-layer sealed heat-insulating manhole door, characterized in that: It comprises an outer frame body, an outer fixing frame is arranged outside the top opening of the outer frame body, an inner fixing frame is arranged inside the outer frame body below the outer fixing frame, and an inner frame body is arranged inside the inner fixing frame; An outer door and an inner door that can be opened and closed are respectively arranged at the top opening of the outer frame and the top opening of the inner frame, and one side of the outer door and the inner door are respectively hinged to the outer fixed frame and the inner fixed frame; the outer door and the inner door are both hollow structures, and the hollow structures of the outer door and the inner door are respectively filled with corrosion-resistant fillers and high-temperature-resistant fillers; The bottom ends of the outer door and the inner door are embedded in the outer frame and the inner frame, and an annular sealing groove is provided in the outer frame, the inner frame and the bottom ends of the outer door and the inner door, and a sealing ring is installed in the sealing groove; A plurality of lock plates with U-shaped grooves at the ends are arranged on the outer edges of the outer door and the inner door, and lock rods corresponding to the lock plates are hingedly arranged on the outer fixed frame and the inner fixed frame respectively, and lock nuts are screwed on the lock rods. The lock rods can be embedded in the U-shaped grooves of the lock plates and the outer door and the inner door can be locked by tightening the lock nuts.

2. A double-layer sealed heat-insulating manhole door according to claim 1, characterized in that: An accommodating space is formed between the bottom of the outer frame and the inner fixed frame and inner frame on the corresponding side. The accommodating space is filled with heat insulating filler, and a sealing plate for closing the accommodating space is arranged between the outer frame and the inner frame on the corresponding side.

3. A double-layer sealed heat-insulating manhole door according to claim 2, characterized in that: The heat-insulating filler is ceramic fiber and / or aluminum silicate fiber.

4. A double-layer sealed heat-insulating manhole door according to claim 1, characterized in that: A lock leaf is arranged on one side of the outer door which is not hinged with the outer fixing frame, and a lock nose is arranged on the outer fixing frame. After the lock leaf is buckled with the lock nose, the lock is locked with a padlock.

5. A double-layer sealed heat-insulating manhole door according to claim 1, characterized in that: A handle is also arranged on the top of one side of the outer door and the inner door which is not hinged with the outer fixing frame and the inner fixing frame.

6. A double-layer sealed heat-insulating manhole door according to claim 1, characterized in that: The locking rod has an annular end and a screw rod arranged on the annular end, and the locking nut is screwed on the screw rod; The outer fixing frame and the inner fixing frame are respectively provided with hinge seats, the annular end of the locking rod is embedded in the hinge seat and is installed on the hinge seat through a bolt assembly and is rotatably arranged relative to the hinge seat.

7. A double-layer sealed heat-insulating manhole door according to claim 6, characterized in that: A gasket is also sleeved on the screw rod located below the lock nut.

8. The double-layer sealed heat-insulating manhole door according to claim 1, characterized in that: The sealing rings on the outer door and the inner door are respectively located above the sealing rings on the outer frame and the inner frame.

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