Installation method of grid unblocking device under condition of limited space containing flammable and explosive gas

Abstract

The present application relates to the installation of a grid unblocking device in a limited space containing flammable and explosive gases, and comprises the following steps: cleaning the area around the target drainage opening; placing a barrier around the target drainage opening to prevent the seepage and garbage from entering the channel; cutting the old grid plate with a water cutting device to form a new drainage opening; hoisting and positioning the unblocking device at the target drainage opening; fixing the main body of the device on both sides of the wall of the garbage pit, with the limiting support abutting the outer wall of the garbage pit, and fixing the main body of the device on the inner wall of the garbage pit using adjusting bolts; and finally removing the barrier. In this way, the entire installation process does not require entering the garbage pit, and the positioning and fixing of the unblocking device are completely achieved in the channel, avoiding the risk of the operator in the harsh environment of the garbage pit. The use of spark-free cutting operations avoids the risk of flammable and explosive gases during installation, greatly reducing the safety hazards of the operation, and making the installation process safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of leachate treatment equipment installation technology, and in particular to an installation method for bar screen cleaning equipment in confined spaces containing flammable and explosive gases. Background Technology

[0002] Because unfermented waste has a high moisture content and low calorific value, it is not suitable for direct incineration. It needs to be composted in the waste pit for 5 to 7 days. The water produced during this process is called "leachate." The leachate leaching rate of municipal solid waste is between 15% and 30%. Timely discharge of leachate has a very important impact on improving the calorific value of waste fuel and increasing the power generation per ton of waste.

[0003] Currently, waste-to-energy plants use a drainage system where drainage outlets are created at the bottom of the waste pit, with gratings installed on these outlets. The gratings allow leachate to pass through and flow into a leachate collection tank, but they also trap waste, causing it to remain in the waste pit. A new method, "gravity-driven drainage - grating interception and filtration," separates leachate from waste. However, due to the complex composition and irregular shape of the waste, strips of plastic and textiles, along with slag and sludge, settle and compress at the bottom, causing grating blockage. Severe blockage significantly hinders the gravity-flow drainage of leachate.

[0004] For garbage pits that have been designed and constructed with dredging equipment installed, the equipment can be used to clear blockages directly when the grating becomes clogged, or the equipment can be used to clear the grating regularly to prevent blockages.

[0005] However, for garbage pits that were not designed and constructed with dredging equipment, the only way to clear the grating is by manual labor, which is physically demanding. Furthermore, once the garbage pit is in use, the foul odors and toxic gases produced during the garbage fermentation process pose a significant threat to the physical and mental health of the dredging personnel.

[0006] In addition, the fermentation process of garbage will produce flammable and explosive gases such as hydrogen sulfide, methane, carbon monoxide, and ammonia. This will not only cause great harm to the physical and mental health of the operators, but also pose a great safety hazard to the installation of equipment. It is completely different from the operation of installing dredging equipment on newly built garbage pits. Installing dredging equipment on garbage pits that have been put into use has a high degree of operational difficulty and risk.

[0007] Therefore, how to install dredging equipment on garbage pits that are already in use is an important issue that the industry urgently needs to address. Summary of the Invention

[0008] This invention provides a method for installing bar screen cleaning equipment in confined spaces containing flammable and explosive gases, thereby reducing the operational difficulty and risk of installing cleaning equipment on garbage pits that are already in use.

[0009] This invention provides an installation method for a bar screen dredging device under confined space conditions containing flammable and explosive gases. The dredging device includes a new bar screen and a device body. The new bar screen is disposed at one end of the device body, and the device body is adapted to dredge the new bar screen. Limiting brackets are provided on the periphery of the new bar screen, and connecting screws are provided on the device body. The installation method for the bar screen dredging device under confined space conditions containing flammable and explosive gases includes:

[0010] Clean up the trash around the target drainage outlet;

[0011] A protective fence is placed inside the waste pit near the target discharge outlet to prevent leachate and waste inside the waste pit from entering the ditch through the target discharge outlet;

[0012] According to the shape and size of the new grating, the old grating installed at the target drainage outlet is cut using water jet cutting equipment to form the new drainage outlet;

[0013] The dredging equipment is hoisted and positioned at the target drainage outlet, so that the new grating plate corresponds to the new drainage outlet, and the limiting bracket abuts against the outer wall of the garbage pit. The main body of the equipment is fixed to the inner wall of the garbage pit using the connecting screw.

[0014] The enclosure fence was moved outside the garbage pit.

[0015] According to the present invention, an installation method for a bar screen dredging device under confined space conditions containing flammable and explosive gases is provided. The enclosure fence includes a first baffle, a second baffle, and a third baffle, which are sequentially connected to form a U-shape.

[0016] The second baffle is adapted to be parallel to the inner wall of the garbage pit, and the first baffle and the third baffle are adapted to abut against the inner wall of the garbage pit.

[0017] According to the present invention, an installation method for a bar screen dredging device under confined space conditions containing flammable and explosive gases includes placing a protective fence inside the garbage pit near the target discharge outlet.

[0018] The hoisting fence or long-arm excavator is used to move the fence into the interior of the garbage pit, with the U-shaped opening of the fence facing the target discharge outlet.

[0019] Move the end of the tow rope attached to the fence to the outside of the garbage pit;

[0020] Apply force to the traction rope so that the traction rope pulls the enclosure fence closer to the inner wall of the garbage pit, and makes the U-shaped opening of the enclosure fence press against the inner wall of the garbage pit;

[0021] Garbage is piled up on the side of the enclosure fence away from the target drainage outlet.

[0022] According to the present invention, an installation method for a bar screen dredging device under confined space conditions containing flammable and explosive gases is provided. The enclosure fence is provided with a first connecting part and a second connecting part. The first connecting part is adapted to connect the hoisting equipment or the long-arm excavator, and the second connecting part is adapted to connect the traction rope.

[0023] According to the present invention, an installation method for a bar screen dredging device under confined space conditions containing flammable and explosive gases is provided, wherein the fence is provided with scale markings, the scale markings being adapted to display the depth of leachate around the fence.

[0024] The present invention provides a method for installing a bar screen in a confined space containing flammable and explosive gases, which further includes:

[0025] Observe the depth of the leachate around the fence;

[0026] The leachate between the enclosure fence and the inner wall of the garbage pit is pumped out to the remaining drain outlets of the garbage pit.

[0027] According to the present invention, an installation method for a bar screen dredging device under confined space conditions containing flammable and explosive gases is provided, wherein the end of the first baffle away from the second baffle and the end of the third baffle away from the second baffle are provided with chamfers.

[0028] According to the present invention, an installation method for a bar screen cleaning device under confined space conditions containing flammable and explosive gases includes cutting an old bar screen installed at the target drain outlet using a water jet cutting device, based on the shape and size of the new bar screen.

[0029] Cut the old grating plate at the position corresponding to the lower edge of the new grating plate;

[0030] Cut the old grating plate at the position corresponding to the side edge of the new grating plate;

[0031] Cut the old grating plate at the position corresponding to the upper edge of the new grating plate.

[0032] According to the present invention, an installation method for a bar screen cleaning device under confined space conditions containing flammable and explosive gases is provided. The main body of the device is provided with a connecting bracket, and the connecting bracket is provided with a connecting hole, the axis of which is perpendicular to the new bar screen.

[0033] The connecting screw can pass through the infiltration holes of the old grating, the nut end of the connecting screw abuts against the side of the old grating near the inside of the garbage pit, and the connecting screw can pass through the connecting hole;

[0034] A connecting nut is provided on the connecting screw, and the connecting nut is located on the side of the connecting bracket away from the old grid plate.

[0035] According to the present invention, an installation method for a bar screen cleaning device under confined space conditions containing flammable and explosive gases is provided. The device body is provided with an abutment rod and a gasket. The axis of the abutment rod is perpendicular to the new bar screen. The abutment rod is threadedly connected to the device body. The gasket is disposed at one end of the abutment rod near the new bar screen.

[0036] The present invention provides an installation method for a bar screen dredging device in a confined space containing flammable and explosive gases. The dredging device includes a new bar screen and a main body. The new bar screen is located at one end of the main body and connected to it, allowing the main body to dredge the new bar screen. A connecting screw is provided on the main body. Limiting brackets are provided around the periphery of the new bar screen. During installation, the garbage around the target drain outlet inside the garbage pit is first removed, exposing the drain outlet and preventing it from being buried. A protective barrier is placed inside the garbage pit near the target drain outlet to isolate it from the garbage, preventing garbage collapse and affecting construction at the drain outlet location, and blocking leachate and garbage from entering the ditch through the drain outlet. Based on the shape and size of the new bar screen, the old bar screen installed at the target drain outlet is cut using a water jet cutter; the holes formed on the old bar screen serve as the new drain outlet. The dredging equipment is hoisted and positioned at the target drainage outlet, and its position is adjusted so that the new grating plate aligns with the new drainage outlet, and the limiting bracket abuts against the outer wall of the garbage pit. Then, the main body of the equipment is fixed to the inner wall of the garbage pit using connecting bolts, thus securing the main body of the equipment to both sides of the garbage pit wall, achieving a stable connection between the dredging equipment and the garbage pit. After installing the main body of the equipment, the enclosure fence is moved outside the garbage pit. This method uses the enclosure fence to reduce the impact of garbage on the construction area, and the connection between the limiting bracket and the main body of the equipment can be achieved outside the garbage pit. The entire installation process does not require entering the garbage pit; the positioning and fixing of the dredging equipment is achieved entirely within the trench, avoiding the impact of the harsh environment of the garbage pit on the operator. Furthermore, the use of spark-free cutting avoids the risk of flammable and explosive gases during installation, greatly reducing safety hazards and ensuring a safe and reliable installation process. This reduces the difficulty of installing dredging equipment on existing garbage pits, making it easier to install dredging equipment on these sites. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a flowchart of the installation method of the bar screen cleaning equipment under confined space conditions containing flammable and explosive gases, provided by the present invention;

[0039] Figure 2 This is a schematic diagram showing the relative positions of the enclosure fence and the target drainage outlet provided by the present invention;

[0040] Figure 3 This is a schematic diagram of the structure of the dredging equipment provided by the present invention when installed at the target drainage outlet;

[0041] Figure 4 yes Figure 3 Enlarged view of I in the middle.

[0042] Figure label:

[0043] 1. New grating; 2. Equipment body; 3. Limiting bracket; 4. Target guide outlet; 5. Enclosure fence; 6. Wall; 7. Connecting bracket; 8. Connecting screw; 9. Old grating; 10. Connecting nut; 11. Abutment rod; 12. Gasket. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0045] The following is combined with Figures 1 to 4 This invention describes the installation method of a bar screen cleaning device under confined space conditions containing flammable and explosive gases.

[0046] The unblocking device used in this embodiment of the invention includes a new grating plate 1 and a device body 2. The new grating plate 1 is disposed at one end of the device body 2 and is connected to the device body 2, allowing the device body 2 to unblock the new grating plate 1. A connecting screw 8 is provided on the device body 2. A limit bracket 3 is provided on the periphery of the new grating plate 1.

[0047] The location of the external drainage outlet of the garbage pit is the ditch area. Before installing the dredging equipment, at least two hoisting devices should be set up in the ditch area to hoist the components of the dredging equipment to the ditch area, assemble them in the ditch area, and then install them.

[0048] like Figure 1 As shown in the figure, the installation method of the bar screen cleaning equipment under confined space conditions containing flammable and explosive gases provided by the embodiments of the present invention includes the following steps:

[0049] Step 110: Clean up the trash around the target drain outlet;

[0050] Step 120: Place a protective fence inside the garbage pit near the target discharge outlet to prevent leachate and garbage inside the garbage pit from entering the ditch through the target discharge outlet;

[0051] Step 130: According to the shape and size of the new grating, use water jet cutting equipment to cut the old grating installed at the target drainage outlet to form a new drainage outlet;

[0052] Step 140: Position the dredging equipment at the target drainage outlet, align the new grating with the new drainage outlet, and make the limiting bracket abut against the outer wall of the garbage pit. Use the connecting screws to fix the main body of the equipment to the inner wall of the garbage pit.

[0053] Step 150: Move the fence and guardrail outside the garbage pit.

[0054] When installing the dredging equipment, first remove the garbage around the target drain opening 4 inside the garbage pit, exposing the target drain opening 4 and preventing it from being buried by garbage. The garbage pit is generally equipped with a gripping device for grabbing and transferring garbage. Use the gripping device to remove the garbage around the target drain opening 4.

[0055] A protective fence 5 is placed inside the garbage pit near the target discharge outlet 4 to isolate the target discharge outlet 4 from the garbage, so as to prevent the garbage from collapsing and affecting the construction at the target discharge outlet 4, reduce the impact of the garbage in the garbage pit on the construction process and operators, and prevent leachate and garbage inside the garbage pit from entering the ditch through the target discharge outlet 4.

[0056] Based on the shape and size of the new grating 1, the old grating 9 installed at the target drain outlet 4 is cut using water jet cutting equipment. The holes formed on the old grating 9 serve as the new drain outlet. Water jet cutting is performed using a mixture of diamond abrasive and water solution.

[0057] The dredging equipment is hoisted and positioned at the target drain outlet 4, and its position is adjusted so that the new grating plate 1 aligns with the new drain outlet, and the limiting bracket 3 abuts against the outer wall of the garbage pit. Then, the main body 2 of the equipment is fixed to the inner wall of the garbage pit using the connecting screw 8, thereby fixing the main body 2 of the equipment to both sides of the garbage pit wall, realizing the connection between the dredging equipment and the garbage pit, and ensuring the stability of the dredging equipment.

[0058] After the main body of the equipment 2 is installed, the enclosure fence 5 is moved outside the garbage pit.

[0059] In this way, the use of the enclosure fence 5 reduces the impact of garbage on the construction area, and the connection between the limiting bracket 3 and the main body of the equipment 2 can be achieved outside the garbage pit. The entire installation process does not require operators to enter the garbage pit; the positioning and fixing of the dredging equipment is achieved entirely within the trench, avoiding the impact of the harsh environment of the garbage pit on the operator. Furthermore, the use of spark-free cutting avoids the risk of flammable and explosive gases during installation, greatly reducing safety hazards and ensuring a safe and reliable installation process. This also reduces the difficulty of installing the dredging equipment on existing garbage pits, making it easier to install the equipment on these sites.

[0060] In addition, the installation method of the bar screen dredging equipment under confined space conditions containing flammable and explosive gases provided in this embodiment of the invention does not affect the normal use of the garbage pit. During the installation process, it is not necessary to empty all the garbage in the garbage pit. The enclosure 5 isolates the target discharge port 4 from the other discharge ports. While the dredging equipment is installed at the target discharge port 4, garbage can still be thrown into the garbage pit through the other discharge ports. The enclosure 5 can effectively prevent garbage from approaching the target discharge port 4.

[0061] In this embodiment of the invention, the fence 5 is U-shaped. Specifically, the fence 5 includes a first baffle, a second baffle, and a third baffle. The first baffle and the third baffle are parallel to each other and spaced apart. The second baffle is located between the first baffle and the second baffle. The second baffle is perpendicular to the first baffle. The first baffle, the second baffle, and the third baffle are connected in sequence.

[0062] When placing the enclosure guardrail 5 at the target drainage outlet 4, the second baffle should be parallel to the inner wall of the garbage pit, and the ends of the first baffle and the third baffle that are away from the second baffle should abut against the inner wall of the garbage pit.

[0063] The fence 5 is provided with a first connecting part and a second connecting part. The first connecting part is used to connect hoisting equipment or long-arm excavator, and the second connecting part is used to connect to the towing rope.

[0064] Using hoisting equipment or a longwall excavator, the perimeter fencing 5 can be placed inside the garbage pit, and its position roughly adjusted. Using a tow rope, the position of the perimeter fencing 5 can be further adjusted so that it is flush against the inner wall of the garbage pit.

[0065] Specifically, the aforementioned first connecting part includes a first crossbeam, which is parallel to the second baffle and positioned between the first and third baffles. Both ends of the first crossbeam are fixedly connected to the first and third baffles, respectively. When hoisting the guardrail 5, hoisting equipment or a long-arm excavator can be used to operate on the first crossbeam.

[0066] The aforementioned second connecting part includes a second crossbeam and a third crossbeam, which are parallel to each other and both parallel to the second baffle. The distribution direction of the second and third crossbeams is perpendicular to the second baffle. A traction rope can be tied to either the second or third crossbeam.

[0067] In this embodiment, when placing the enclosure fence 5 inside the garbage pit near the target discharge port 4, it is necessary to use hoisting equipment or a long-arm excavator to move the enclosure fence 5 into the inside of the garbage pit, and then make the U-shaped opening of the enclosure fence 5 face the target discharge port 4.

[0068] A garbage unloading port is provided on the side wall of the garbage pit for garbage trucks to unload garbage into the pit. The perimeter fence 5 can enter and exit the garbage pit through the garbage unloading port.

[0069] After moving the garbage bin into the interior, make the U-shaped opening side of the enclosure 5 as close as possible to the inner wall of the garbage bin, and then slowly lower the enclosure 5.

[0070] Before placing the fence 5 into the garbage pit, a tow rope needs to be tied to the second connecting part of the fence 5. The first end of the tow rope is connected to the second connecting part, and the second end of the tow rope is the free end.

[0071] After placing the fence 5, move the end of the traction rope connected to the fence 5 to the outside of the garbage pit, and then apply force to the traction rope so that the traction rope pulls the fence 5 close to the inner wall of the garbage pit, so that the U-shaped opening of the fence 5 is pressed against the inner wall of the garbage pit.

[0072] When the fence 5 is placed in the garbage pit, the second connecting part is located below the first connecting part. When adjusting the position of the fence 5 using the traction rope, the stability of the fence 5 can be ensured, and the fence 5 can be prevented from tipping over or being displaced by the garbage.

[0073] Specifically, an operating rod with a clamp or hook structure can be used to clamp or hook the second end of the traction rope, and then move the second end of the traction rope to the outside of the garbage pit through the garbage discharge port. The operator can then apply tension to the perimeter fence 5 from outside the garbage pit.

[0074] After adjusting the position of the fence 5, use the grabbing device to pile up garbage on the side of the fence 5 away from the target discharge port 4, so that the garbage exerts a force on the fence 5 close to the inner wall of the garbage pool, ensuring the stability of the fence 5.

[0075] In this embodiment of the invention, a scale mark is provided on the fence 5, which is used to display the depth of leachate around the fence 5.

[0076] During the installation of the dredging equipment, it is necessary to observe the depth of the leachate around the guardrail 5 in real time, which is the depth of the leachate around the target drainage outlet 4.

[0077] When the leachate depth around the target drainage outlet 4 is significant, the leachate between the enclosure fence 5 and the inner wall of the waste pit needs to be promptly pumped to other drainage outlets within the waste pit. This ensures that the leachate is discharged through other outlets in a timely manner, preventing it from affecting the target drainage outlet 4 and ensuring the smooth progress of the installation process. Alternatively, the pumping power of the water pump can be adjusted in real time according to the leachate depth during the leachate pumping process.

[0078] Draining leachate in a timely manner can also reduce the amount of leachate flowing outside the waste pit when cutting the old grating plate 9, thus avoiding any impact on the installation operation.

[0079] The above-mentioned scale markings can be processed with brightly colored paint to facilitate observation.

[0080] In some embodiments, the bottom end of the inner sidewall of the garbage pit has a chamfer, which can reduce the dead corners where dirt can accumulate inside the garbage pit. Accordingly, in this embodiment, chamfers are provided at the ends of the first baffle away from the second baffle and the third baffle away from the second baffle, so that the lower end of the enclosure 5 can fit snugly against the inner wall of the garbage pit, reducing the gap between the enclosure 5 and the inner wall of the garbage pit, reducing the flow of leachate from the outside space of the enclosure 5 into the inside of the enclosure 5, and further reducing the impact on the installation process.

[0081] For step 130, it is necessary to determine the installation position of the new grating plate 1 on the target guide port 4. Then, based on the shape and size of the new grating plate 1, determine the position on the old grating plate 9 that corresponds to the lower edge of the new grating plate 1, the position that corresponds to the side edge of the new grating plate 1, and the position that corresponds to the upper edge of the new grating plate 1.

[0082] When cutting the old grating 9, it is necessary to first cut the position on the old grating 9 that corresponds to the lower edge of the new grating 1, then cut the position on the old grating 9 that corresponds to the side edge of the new grating 1, and finally cut the position on the old grating 9 that corresponds to the upper edge of the new grating 1.

[0083] Cut the old grating plate 9 according to the above cutting sequence. Even if there is garbage and leachate around the discharge port, the cutting action will not be unable to be carried out due to the leakage of garbage and leachate during the cutting process.

[0084] Because the silt at the bottom of the old grating 9 is thick and dense, making dredging difficult, it is generally done in the middle of the grating. When cutting the old grating 9, the location of the new drainage outlet and the new grating 1 is determined according to the thickness of the silt. Based on field experience, the new drainage outlet is generally set within 2 / 3 to 3 / 4 of the distance from the bottom of the old grating 9.

[0085] In this embodiment of the invention, the connecting screw 8 is used to connect the main body 2 of the equipment to the old grating plate 9. The old grating plate 9 originally abutted against the inner wall of the garbage pit, thereby enabling the main body 2 of the equipment to be fixed to the inner wall of the garbage pit.

[0086] It should be noted that fixing the main body 2 of the equipment to the inner wall of the garbage pit does not mean fixing the main body 2 of the equipment to the inner wall of the garbage pit, but rather making the inner wall of the garbage pit the stress point.

[0087] A connecting bracket 7 is provided on the main body 2 of the equipment, and a connecting hole is provided on the connecting bracket 7. The axis of the connecting hole is perpendicular to the new grid plate 1.

[0088] The connecting screw 8 passes through the permeation hole of the old grating plate 9, and the nut end of the connecting screw 8 abuts against the side of the old grating plate 9 near the inside of the garbage pit. The connecting screw 8 can pass through the connecting hole.

[0089] Connect the connecting nut 10 to the connecting screw 8, and the connecting nut 10 is located on the side of the connecting bracket 7 away from the old grid plate 9.

[0090] It should be noted that when the connecting screw 8 passes through the seepage hole of the old grating plate 9, the connecting screw 8 can be allowed to enter the interior of the garbage pit through the new drain outlet before the dredging equipment is installed. Then, the position of the connecting screw 8 can be adjusted to allow the connecting screw 8 to pass through the old grating plate 9.

[0091] The connecting screw 8 includes a nut section and a threaded section. An oblong hole is provided at the end of the nut section and the threaded section that are close together. A pin passes through the oblong hole to hinge the nut section and the threaded section together. When connecting the connecting screw 8 to the connecting bracket 7, the axis of the oblong hole must be horizontal. The nut section and the threaded section can rotate relative to each other around the horizontal axis, which can accommodate the height difference between the seepage holes on the old grating plate 9 and the connecting holes on the connecting bracket 7, making installation easier.

[0092] In this embodiment, an abutment rod 11 and a gasket 12 are provided on the main body 2 of the equipment. The axis of the abutment rod 11 is perpendicular to the new grating plate 1. The abutment rod 11 is threadedly connected to the main body 2 of the equipment. The abutment rod 11 is directly opposite the outer wall of the garbage pit. Figure 3 and Figure 4 .

[0093] The gasket 12 is located at the end of the abutment rod 11 near the new grating plate 1. By screwing the abutment rod 11, the abutment rod 11 can move the gasket 12 closer to or further away from the outer wall of the garbage pit. When the abutment rod 11 presses the gasket 12 against the outer wall of the garbage pit, the interaction between the gasket 12 and the outer wall of the garbage pit, combined with the function of the connecting mechanism, can effectively restrict the movement of the main body 2 of the equipment relative to the garbage pit in a direction perpendicular to the new grating plate 1. This achieves the fixation of the dredging equipment to the garbage pit wall 6 and ensures the stability of the dredging equipment.

[0094] It should be noted that the dredging equipment in this embodiment of the invention also includes a hydraulic drive system connected to the main body 2 of the equipment. The hydraulic drive system adopts a mining explosion-proof hydraulic power system. The hydraulic pump station is connected to the hydraulic cylinder of the main body 2 of the equipment by a pressure-resistant rubber hose. A 316L stainless steel ball valve is installed at the connection point of each pressure-resistant rubber hose to the hydraulic cylinder of the main body 2 of the equipment.

[0095] Before securing the main body 2 of the equipment, the hydraulic drive system needs to be connected to the hydraulic cylinders of the main body 2. Then, the motor speed of the hydraulic pump station needs to be adjusted, the hydraulic oil flow rate controlled, and the driving speed of the hydraulic cylinders pushing the actuators of the main body 2 adjusted. While maintaining the rated working pressure of the hydraulic drive system at 16 MPa, check for leaks in the pressure-resistant hoses. Only after the hydraulic pump station, the hydraulic cylinders of the main body 2, and the actuators are functioning normally should the main body 2 be secured.

[0096] It should be noted that the inner wall of the garbage pool mentioned in this application is the side wall of the wall 6 where the target discharge port 4 is located, facing the inside of the garbage pool, and the outer wall of the garbage pool is the side wall of the wall 6 where the target discharge port 4 is located, facing the channel.

[0097] In summary, the installation method for bar screen cleaning equipment in confined spaces containing flammable and explosive gases provided by the embodiments of the present invention has the advantages of low risk, ease of implementation, and strong applicability.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for installing a bar screen in a confined space containing flammable and explosive gases, characterized in that, The dredging equipment includes a new grating plate and a main body. The new grating plate is disposed at one end of the main body, and the main body is adapted to dredge the new grating plate. Limiting brackets are provided around the periphery of the new grating plate, and connecting screws are provided on the main body. The installation method of the grating dredging equipment under confined space conditions containing flammable and explosive gases includes: Clean up the trash around the target drainage outlet; A protective fence is placed inside the waste pit near the target discharge outlet to prevent leachate and waste inside the waste pit from entering the ditch through the target discharge outlet; According to the shape and size of the new grating, the old grating installed at the target drainage outlet is cut using water jet cutting equipment to form the new drainage outlet; The dredging equipment is hoisted and positioned at the target drainage outlet, aligning the new grating with the new drainage outlet, and the limiting bracket is abutted against the outer wall of the garbage pit. The connecting screw is used to fix the main body of the equipment to the old grating on the inner wall of the garbage pit. The main body of the equipment is provided with an abutting rod and a gasket. The axis of the abutting rod is perpendicular to the new grating, and the abutting rod is threadedly connected to the main body of the equipment. The gasket is located at the end of the abutting rod near the new grating, and the abutting rod presses the gasket against the outer wall of the garbage pit. The enclosure fence was moved outside the garbage pit.

2. The installation method for bar screen cleaning equipment under confined space conditions containing flammable and explosive gases as described in claim 1, characterized in that, The fence includes a first baffle, a second baffle, and a third baffle, which are connected in sequence to form a U-shape. The second baffle is adapted to be parallel to the inner wall of the garbage pit, and the first baffle and the third baffle are adapted to abut against the inner wall of the garbage pit.

3. The installation method for bar screen unblocking equipment under confined space conditions containing flammable and explosive gases as described in claim 2, characterized in that, The placement of a fencing or guardrail inside the waste pit near the target discharge outlet includes: The hoisting fence or long-arm excavator is used to move the fence into the interior of the garbage pit, with the U-shaped opening of the fence facing the target discharge outlet. Move the end of the tow rope attached to the fence to the outside of the garbage pit; Apply force to the traction rope so that the traction rope pulls the enclosure fence closer to the inner wall of the garbage pit, and makes the U-shaped opening of the enclosure fence press against the inner wall of the garbage pit; Garbage is piled up on the side of the enclosure fence away from the target drainage outlet.

4. The installation method for bar screen unblocking equipment under confined space conditions containing flammable and explosive gases as described in claim 3, characterized in that, The enclosure fence is provided with a first connecting part and a second connecting part. The first connecting part is adapted to connect the hoisting equipment or the long-arm excavator, and the second connecting part is adapted to connect the towing rope.

5. The installation method for a bar screen cleaning device under confined space conditions containing flammable and explosive gases according to any one of claims 1 to 4, characterized in that, The fencing is equipped with scale markings that are adapted to display the depth of leachate around the fencing.

6. The installation method for bar screen unblocking equipment under confined space conditions containing flammable and explosive gases as described in claim 5, characterized in that, Also includes: Observe the depth of the leachate around the fence; The leachate between the enclosure fence and the inner wall of the garbage pit is pumped out to the remaining drain outlets of the garbage pit.

7. The installation method for bar screen unblocking equipment under confined space conditions containing flammable and explosive gases as described in claim 2, characterized in that, The end of the first baffle away from the second baffle and the end of the third baffle away from the second baffle are provided with chamfers.

8. The installation method for a bar screen cleaning device under confined space conditions containing flammable and explosive gases according to any one of claims 1 to 4, characterized in that, Based on the shape and size of the new grating, the old grating installed at the target drainage outlet is cut using a water jet cutting device, including: Cut the old grating plate at the position corresponding to the lower edge of the new grating plate; Cut the old grating plate at the position corresponding to the side edge of the new grating plate; Cut the old grating plate at the position corresponding to the upper edge of the new grating plate.

9. The installation method for a bar screen cleaning device under confined space conditions containing flammable and explosive gases according to any one of claims 1 to 4, characterized in that, The main body of the equipment is provided with a connecting bracket, and the connecting bracket is provided with a connecting hole, the axis of which is perpendicular to the new grid plate; The connecting screw can pass through the infiltration holes of the old grating, the nut end of the connecting screw abuts against the side of the old grating near the inside of the garbage pit, and the connecting screw can pass through the connecting hole; A connecting nut is provided on the connecting screw, and the connecting nut is located on the side of the connecting bracket away from the old grid plate.

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