Manhole access door convenient to observe and clean

Abstract

The utility model discloses a manhole access door convenient to observe and clean, which belongs to the technical field of material containers, and comprises a manhole door and a cover plate rotatably arranged on one side of the manhole door, a mounting hole is formed in the middle of the cover plate, an observation window is welded in the mounting hole, and the observation window is connected with the manhole door. The cover plate is provided with a nozzle kit, one end of the nozzle kit is provided with a compressed air blowing system, the nozzle kit comprises two compressed air blowing nozzles, the nozzle ends of the compressed air blowing nozzles penetrate to the inner side of the cover plate, the cover plate on the manhole door can be combined with the observation window, and the cover plate can be conveniently cleaned. The compressed air blowing system is matched with the nozzle suite for use, and compressed air or inert gas is used for blowing the explosion-proof glass on the inner side of the container through the compressed air blowing nozzle, so that the purpose of cleaning is achieved, the requirement for visual observation of a continuous operation device is met, and the production progress and quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of material container technology, and more specifically, to a manhole access door that is easy to observe and clean. Background Technology

[0002] In the operation of many production facilities in the petroleum, chemical, and food industries, it is often required that the equipment be able to effectively monitor the working reaction of materials inside the container during continuous operation, or that the oxygen content inside the container, which stores flammable and explosive materials, must not exceed a set value. When the material inside the container is in the blind zone of the level sensor but the actual accumulation height of the material is higher than the manhole door, the existing manhole door usually cannot effectively and intuitively observe the actual situation of the raw materials accumulated in the reaction device or storage device or the waste generated after the reaction. Opening the manhole door can easily cause personal injury accidents to maintenance personnel. In order to avoid such safety accidents, it is usually necessary to observe the inside of the container through the observation window.

[0003] Based on the above, the inventors have discovered that existing observation windows use glass lenses. When the lenses become contaminated, the equipment needs to be stopped to replace them or cleaned using a manual scraper device installed inside the container. However, under prolonged use, the lenses and scrapers are still prone to contamination by the medium, and after wear, they cannot achieve an effective cleaning effect, thus requiring frequent replacement. This renders the observation function of the equipment, which requires continuous operation, obsolete, affecting production progress and quality. Furthermore, existing observation windows and manholes are usually installed separately, which may create blind spots, making it difficult to observe the internal conditions of the container and resulting in poor overall safety. Therefore, in view of this, the inventors have researched and improved the existing structure to provide a manhole inspection door that facilitates observation and cleaning, aiming to achieve greater practical value. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a manhole inspection door that is easy to observe and clean. It can combine the cover plate on the manhole door with the observation window, and use a compressed air blowing system and nozzle kit to blow compressed air or inert gas through the compressed gas blowing nozzle to blow the explosion-proof glass inside the container to achieve the purpose of cleaning, meet the intuitive observation of the continuous operation device, and improve the production progress and quality.

[0006] 2. Technical Solution

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A manhole access door that is easy to observe and clean includes a manhole door and a cover plate that rotates on one side of the manhole door. The cover plate has an installation hole in the middle and an observation window is welded in the installation hole. The cover plate is provided with a nozzle kit and a compressed air blowing system is provided at one end of the nozzle kit.

[0009] The nozzle kit includes two compressed air purging nozzles, the nozzle ends of which extend to the inside of the cover plate, and the connection of the compressed air purging nozzles is connected to a check valve via a stainless steel pipe.

[0010] The compressed air jetting system includes a compressed air buffer tank, an air source dual unit, a pulse valve, and a manual ball valve. The air inlet of the compressed air buffer tank is connected to the air source dual unit via a stainless steel pipe, the air outlet of the compressed air buffer tank is connected to the air inlet of the pulse valve via a stainless steel pipe, and the air outlet of the pulse valve is connected to the air inlet of the manual ball valve via a stainless steel pipe.

[0011] Furthermore, the air outlet of the manual ball valve is connected to the check valve via a double compression fitting.

[0012] Furthermore, the observation window includes two window flanges fixed in the mounting hole in the middle of the cover plate, and explosion-proof glass is fixedly connected between the two window flanges.

[0013] Furthermore, the two compressed air purging nozzles are arranged symmetrically to each other.

[0014] Furthermore, the nozzle end of the compressed air purging nozzle extends through the inside of the cover plate and faces the center of the explosion-proof glass.

[0015] Furthermore, the top of the cover plate is rotatably connected to the top of the manhole door via a pin.

[0016] Furthermore, multiple latches are provided to securely connect the manhole door to the edge of the cover plate.

[0017] 3. Beneficial effects

[0018] Compared with existing technologies, the advantages of this utility model are:

[0019] (1) In this solution, by opening an installation hole on the cover plate of the manhole door and fixing the explosion-proof glass in the installation hole through two viewing window flanges, the cover plate and the observation window can be used together to reduce the blind spot and make the observation of the internal situation of the container more intuitive, which greatly improves the overall safety of use.

[0020] (2) In this solution, the compressed air jetting system is used in conjunction with the nozzle kit. The compressed air is adjusted to 0.2-0.3 MPa through the air source dual unit and temporarily stored in the compressed air buffer tank. The compressed air is then blown onto the explosion-proof glass through the compressed gas purging nozzle by setting the time or manually controlling the pulse valve on site to achieve the purpose of cleaning. This allows for the intuitive observation of the equipment that needs to operate continuously, greatly improving the production progress and quality. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0024] Explanation of the labels in the diagram:

[0025] 1. Manhole;

[0026] 2. Observation window; 201. Window flange; 202. Explosion-proof glass;

[0027] 3. Nozzle kit; 301. Compressed air purging nozzle; 302. Check valve;

[0028] 4. Compressed air jetting system; 401. Compressed air buffer tank; 402. Air source dual unit; 403. Pulse valve; 404. Manual ball valve;

[0029] 5. Cover plate;

[0030] 6. Locking latch. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0032] Example:

[0033] Please see Figures 1-3 A manhole access door that is easy to observe and clean includes a manhole door 1 and a cover plate 5 that rotates on one side of the manhole door 1. The cover plate 5 has an installation hole in the middle and an observation window 2 is welded in the installation hole. A nozzle kit 3 is provided on the cover plate 5 and a compressed air blowing system 4 is provided at one end of the nozzle kit 3.

[0034] The nozzle kit 3 includes two compressed air purging nozzles 301. The nozzle ends of the compressed air purging nozzles 301 extend through the inside of the cover plate 5. The connection part of the compressed air purging nozzles 301 is connected to a check valve 302 through a stainless steel pipe.

[0035] The compressed air jetting system 4 includes a compressed air buffer tank 401, an air source dual unit 402, a pulse valve 403, and a manual ball valve 404. The air inlet of the compressed air buffer tank 401 is connected to the air source dual unit 402 through a stainless steel pipe, the air outlet of the compressed air buffer tank 401 is connected to the air inlet of the pulse valve 403 through a stainless steel pipe, and the air outlet of the pulse valve 403 is connected to the air inlet of the manual ball valve 404 through a stainless steel pipe.

[0036] See Figure 3 The air outlet of the manual ball valve 404 is connected to the check valve 302 via a double compression fitting.

[0037] See Figure 2 The observation window 2 includes two window flanges 201 fixed in the mounting hole in the middle of the cover plate 5, and explosion-proof glass 202 is fixedly connected between the two window flanges 201.

[0038] See Figure 3 Two compressed air purging nozzles 301 are arranged symmetrically to each other.

[0039] See Figure 2 The nozzle end of the compressed air purging nozzle 301 extends through the inside of the cover plate 5 and faces the center of the explosion-proof glass 202.

[0040] See Figure 2 The top of the cover plate 5 is rotatably connected to the top of the manhole door 1 via a pin.

[0041] See Figure 1 Multiple latches 6 are fixedly connected between the manhole door 1 and the edge of the cover plate 5.

[0042] In use: Mounting holes are made in the cover plate 5 on the manhole door 1, and the explosion-proof glass 202 is fixed in the mounting holes through two viewing window flanges 201, so that the cover plate 5 and the observation window 2 can be used together to reduce blind spots and make the observation of the inside of the container more intuitive, greatly improving the overall safety of use; In addition, when the side of the explosion-proof glass 202 inside the container is contaminated, the compressed air blowing system 4 and the nozzle kit 3 are used together. The compressed air is adjusted to 0.2-0.3 MPa through the air source dual unit 402 and temporarily stored in the compressed air buffer tank 401. The compressed air is blown onto the explosion-proof glass 202 through the compressed air blowing nozzle 301 by the pulse valve 403 at a set time or manually controlled on site to achieve the purpose of cleaning. This can meet the intuitive observation of the equipment that needs to operate continuously, greatly improving the production progress and quality.

[0043] Finally, it should be noted that in the description of this utility model, the terms "vertical," "upper," "lower," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A manhole access door that is easy to observe and clean, comprising a manhole door (1) and a cover plate (5) that rotates on one side of the manhole door (1), characterized in that: The cover plate (5) has an installation hole in the middle and an observation window (2) is welded in the installation hole. The cover plate (5) is provided with a nozzle kit (3) and a compressed air blowing system (4) is provided at one end of the nozzle kit (3). The nozzle kit (3) includes two compressed air purging nozzles (301), the nozzle ends of the compressed air purging nozzles (301) extend through the inside of the cover plate (5), and the connection part of the compressed air purging nozzles (301) is connected to a check valve (302) through a stainless steel pipe. The compressed air jetting system (4) includes a compressed air buffer tank (401), an air source dual unit (402), a pulse valve (403), and a manual ball valve (404). The air inlet of the compressed air buffer tank (401) is connected to the air source dual unit (402) through a stainless steel pipe. The air outlet of the compressed air buffer tank (401) is connected to the air inlet of the pulse valve (403) through a stainless steel pipe. The air outlet of the pulse valve (403) is connected to the air inlet of the manual ball valve (404) through a stainless steel pipe.

2. The manhole access door for easy observation and cleaning according to claim 1, characterized in that: The outlet of the manual ball valve (404) is connected to the check valve (302) via a double compression fitting.

3. A manhole access door for easy observation and cleaning according to claim 1, characterized in that: The observation window (2) includes two window flanges (201) fixed in the mounting hole in the middle of the cover plate (5), and explosion-proof glass (202) is fixedly connected between the two window flanges (201).

4. A manhole access door for easy observation and cleaning according to claim 1, characterized in that: The two compressed air purging nozzles (301) are arranged symmetrically to each other.

5. A manhole access door for easy observation and cleaning according to claim 1, characterized in that: The nozzle end of the compressed air purging nozzle (301) extends through to the inside of the cover plate (5) and faces the center of the explosion-proof glass (202).

6. A manhole access door for easy observation and cleaning according to claim 1, characterized in that: The top of the cover plate (5) is rotatably connected to the top of the manhole door (1) by a pin.

7. A manhole access door for easy observation and cleaning according to claim 1, characterized in that: Multiple latches (6) are fixedly connected between the manhole door (1) and the edge of the cover plate (5).

Images