An elevator counterweight processing device and a processing technology thereof

Abstract

The application discloses an elevator counterweight processing equipment, which comprises a cutting table, a laser cutting head connected to the top of the cutting table through a moving assembly, a collecting box with an open top arranged below the cutting table, a purification box connected to the collecting box through an air extraction pipe, a main air extraction pump installed on the air extraction pipe and a gas storage tank connected to the purification box through an air outlet pipe. The protective gas sprayed by the laser cutting head can be sucked to the gas storage tank through the air extraction pipe and the collecting box for recycling and storage, so that the loss of the protective gas is reduced, and the processing cost of the laser cutting machine is reduced. The filter element in the purification box can purify the recycled protective gas, improve the concentration of the protective gas, and further improve the effect of subsequent use of the protective gas. The application further discloses an elevator counterweight processing process.

Description

Technical Field

[0001] This invention belongs to the field of elevator counterweight processing technology, and particularly relates to an elevator counterweight processing equipment and its processing technology. Background Technology

[0002] Elevator counterweights are used to balance the tension in the elevator traction machine's wire ropes, ensuring the elevator's normal operation. They are typically made of cast iron or steel, and their shape and size vary from manufacturer to manufacturer.

[0003] In the processing of elevator counterweights, a laser cutting machine is used to cut steel plates into the shape of the counterweights. During laser cutting, a protective gas is typically used to protect the cut surface. Existing laser cutting machines usually use protective gases such as nitrogen and argon. After use, the protective gas is usually directly released into the air, resulting in significant waste. In particular, inert gases like argon are expensive to purchase, and direct release greatly increases the operating cost of the laser cutting machine.

[0004] Therefore, it is necessary to improve the existing elevator counterweight processing equipment. Summary of the Invention

[0005] One of the objectives of this invention is to overcome the deficiencies in the prior art and provide an elevator counterweight processing device that reduces the cutting cost of elevator counterweights.

[0006] To achieve the above objectives, the specific technical solution of the elevator counterweight processing equipment of the present invention is as follows:

[0007] An elevator counterweight processing device includes a cutting table, a laser cutting head connected to the top of the cutting table via a moving component, a collection box with an open top located below the cutting table, a purification box connected to the collection box via an exhaust pipe, a main exhaust pump installed on the exhaust pipe, and an air storage tank connected to the purification box via an exhaust pipe.

[0008] Preferably, in order to reduce the maintenance cost of the laser cutting machine, the cutting table includes an outer frame and a plurality of mesh plates disposed inside the outer frame, the number of collection boxes is equal to the number of mesh plates and they correspond one-to-one, and the mesh plates cover the top of the collection boxes.

[0009] Preferably, in order to improve the recovery effect of protective gas, the collection box is provided with a partition, which divides the internal space of the collection box into multiple water injection chambers for water injection. Each water injection chamber is arranged in an array along the horizontal direction, and the water injection chamber is connected to the air extraction pipe through a branch pipe, which is equipped with a solenoid valve.

[0010] Preferably, in order to improve the purification effect on the collected protective gas, the exhaust pipe extends into the purification box and is distributed at the bottom of the purification box, and multiple exhaust holes are evenly distributed on the outer periphery of the part of the exhaust pipe located in the purification box.

[0011] Preferably, in order to purify the recovered protective gas and increase its concentration, the purification chamber is provided with an adsorption layer, a drying layer and a filter layer from bottom to top. A portion of the exhaust pipe inside the purification chamber is located inside the adsorption layer. The top of the purification chamber is connected to an exhaust pipe, which is connected to the top of the purification chamber and is equipped with a first check valve.

[0012] Preferably, in order to cool the laser, the laser cutting head includes a laser and a nozzle, the outer periphery of the laser is covered by a shell, a sealed interlayer is formed between the shell and the outer surface of the laser, the interlayer has an air inlet communicating with the air tank and an air outlet communicating with the nozzle.

[0013] Preferably, in order to improve the cooling effect on the laser, the interlayer is provided with multiple guide strips, which divide the interlayer space between the air inlet and the air outlet into multiple airflow channels.

[0014] Preferably, in order to improve the recovery effect of the protective gas, a protective sleeve is coaxially arranged around the nozzle, and an air extraction port communicating with the air extraction pipe is provided on one side of the protective sleeve.

[0015] Preferably, in order to reduce the amount of waste generated during cutting that enters the branch pipe, the branch pipe extends into the water injection chamber, and the height of the end of the branch pipe is greater than the liquid level in the water injection chamber. A baffle is provided at the end of the branch pipe, and a gap is left between the baffle and the end of the branch pipe.

[0016] The second objective of this invention is to overcome the deficiencies in the existing technology and provide a processing method for elevator counterweights, including the following steps:

[0017] Step 1, Inspection: Inspect the thickness and flatness of the raw steel plate;

[0018] Step 2, cutting: The raw steel plate is cut using a cutting machine to form a counterweight.

[0019] Step 3, Grinding: Grind the counterweight block with a grinding machine to remove burrs from the edges of the counterweight block;

[0020] Step 4, leveling: The counterweight is leveled using a hydraulic press;

[0021] Step 5: Spray painting. Spray paint the surface of the counterweight and allow it to air dry naturally.

[0022] Step 6, quality inspection: inspect the surface defects of the counterweight and weigh the counterweight to detect its weight;

[0023] Step 7: Packaging. Wrap the counterweight with a film and secure it with cable ties.

[0024] The elevator counterweight processing equipment and its processing technology of the present invention have the following advantages: the protective gas ejected by the laser cutting head can be drawn into the gas storage tank for recycling and storage through the air extraction pipe and the collection box, which reduces the loss of protective gas and reduces the processing cost of the laser cutting machine; the recycled protective gas can be purified through the filter element inside the purification box, which increases the concentration of the protective gas and thus improves the effect of subsequent use of the protective gas. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the elevator counterweight processing equipment of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of the moving component of the present invention;

[0027] Figure 3 This is a schematic diagram of the bottom structure of the elevator counterweight processing equipment of the present invention;

[0028] Figure 4 This is a schematic diagram of the connection structure between the mesh plate and the collection box of the present invention;

[0029] Figure 5 This is a schematic diagram of the connection structure between the collection box and the suction pipe of the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the collection box of the present invention;

[0031] Figure 7 This is a schematic diagram of the connection structure between the purification box and the gas storage tank of the present invention;

[0032] Figure 8 This is a schematic diagram of the internal structure of the purification box of the present invention;

[0033] Figure 9 This is a schematic diagram of the structure of the laser cutting head of the present invention;

[0034] Figure 10 This is a cross-sectional view of the laser cutting head of the present invention;

[0035] Figure 11 This is a schematic diagram of the processing steps of the elevator counterweight block according to the present invention;

[0036] Explanation of markings in the diagram: 1. Cutting table; 2. Laser cutting head; 3. Gas tank; 4. Purification chamber; 5. Gas outlet pipe; 6. Gas extraction pipe; 7. Moving component; 8. Collection box; 101. Outer frame; 102. Mesh plate; 201. Laser; 202. Nozzle; 203. Cover; 204. Air inlet; 205. Air outlet; 206. Interlayer; 207. Guide strip; 208. Protective sleeve; 209. Gas extraction port; 401. Chamber; 402. Box 403. Cover; 404. Filter layer; 405. Drying layer; 406. Adsorption layer; 501. First check valve; 502. Auxiliary air pump; 601. Main air pump; 602. Second check valve; 603. Baffle; 604. Solenoid valve; 605. Branch pipe; 606. Exhaust port; 701. Track; 702. First movable seat; 703. Gantry frame; 704. Second movable seat; 705. Lifting slide; 801. Water injection chamber; 802. Partition. Detailed Implementation

[0037] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0038] The terms "top surface," "bottom surface," and "full surface" are used with reference to the normal operating state of the elevator counterweight processing equipment and are only for the purpose of describing the present invention and simplifying the description. They are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0039] In the processing of elevator counterweights, a laser cutting machine is usually used to cut the raw steel plate into the shape of the elevator counterweight. During the laser cutting process, a protective gas is sprayed to protect the cut surface and prevent the raw steel plate from being oxidized. The protective gas of the existing laser cutting machine is directly discharged into the air after being sprayed out, resulting in a large amount of waste of the protective gas. In particular, inert gases such as argon have high purchase costs, and direct discharge will greatly increase the production cost of the laser cutting machine.

[0040] To address the above problems, an elevator counterweight processing device is provided, see [link to relevant documentation]. Figure 1 , Figure 3 and Figure 7 It includes a cutting table 1, a laser cutting head 2 connected to the top of the cutting table 1 via a moving component 7, a collection box 8 with an open top located directly below the cutting table 1, a purification box 4 connected to the collection box 8 via an exhaust pipe 6, a main exhaust pump 601 installed on the exhaust pipe 6, and an air storage tank 3 connected to the purification box 4 via an exhaust pipe 5.

[0041] The moving component 7 includes two parallel rails 701 disposed on both sides of the cutting table. A first moving seat 702 is disposed on the rails 701 and can move along the rails 701. A gantry frame 703 is erected between the two first moving seats 702. A second moving seat 704 is disposed on the gantry frame 703 and can move along the top beam of the gantry frame 703. A lifting slide 705 is disposed on the second moving seat 704. The laser cutting head 2 is mounted on the lifting end of the lifting slide 705. When the moving component 7 is working, the first moving seat 702 drives the laser cutting head 2 to move along the length direction of the cutting table 1, the second moving seat 704 drives the laser cutting head 2 to move along the width direction of the cutting table, and the lifting slide 705 drives the laser cutting head 2 to rise and fall, thereby realizing the movement of the laser cutting head 2 in three-dimensional space above the cutting table 1.

[0042] When using this laser cutting machine, the raw steel plate is laid flat on the cutting table 1, and the laser cutting head 2 moves on the raw steel plate to cut out the counterweight. During the cutting process, the main air pump 601 runs, and the air inside the collection box 8 is extracted through the air extraction pipe 6, creating a negative pressure inside. This draws the protective gas ejected by the laser cutting head 2 and the air into the collection box 8. After being purified by the purification box 4, the concentration of the protective gas is increased. Then, the purified protective gas and air are injected into the gas storage tank 3 through the exhaust pipe 5 for storage, thereby realizing the recovery of the protective gas, reducing the loss of the protective gas, and lowering the processing cost of the laser cutting machine.

[0043] Compared with existing laser cutting machines, this laser cutting machine can recover protective gas, reduce losses, and thus reduce production costs. While collecting protective gas, it can also collect fly ash and residue generated during the cutting process, and filter the waste gas and residue, improving the environmental performance of the laser cutting machine. The collection box 8 is set below the cutting table 1, and most of the protective gas ejected by the laser cutting head 2 passes directly through the cutting table 1 and is injected into the collection box 8, which can improve the collection efficiency of protective gas and further reduce the loss of protective gas.

[0044] Further improvements are, see [link / reference] Figures 1-4 The cutting table 1 includes an outer frame 101 and a plurality of mesh plates 102 disposed inside the outer frame 101. The number of collection boxes 8 is equal to that of the mesh plates 102 and they correspond one-to-one. The mesh plates 102 cover the top of the collection boxes 8.

[0045] The outer frame 101 is fixed between the rails 701. The outer frame 101 has a stepped section, on which the screen plate 102 is mounted. The stepped section supports the screen plate 102, and the outer frame 101 limits the position of the screen plate 102. The screen plate 102 has holes, allowing the waste gas, slag, and protective gas generated during cutting to pass through the screen plate 102 and be sprayed into the collection box 8. This configuration divides the cutting table 1 into multiple screen plates 102, allowing individual replacement of a damaged screen plate 102 without replacing the entire cutting table, thus reducing the maintenance cost of the laser cutting machine. Furthermore, the connection method between the screen plate 102 and the outer frame 101 allows the screen plate 102 to be directly removed and placed from inside the outer frame 101, improving the ease of assembly and disassembly of the screen plate 102.

[0046] Further improvements are, see [link / reference] Figure 6 The collection box 8 is equipped with a partition 802, which divides the internal space of the collection box 8 into multiple water injection chambers 801 for water injection. Each water injection chamber 801 is arranged in an array along the horizontal direction. The water injection chambers 801 are connected to the air extraction pipe 6 through the branch pipe 605. The branch pipe 605 is equipped with a solenoid valve 604.

[0047] In use, the position of the laser cutting head 2 above the cutting table 1 can be calculated based on the distance moved by the first movable seat 702 and the second movable seat 704. When the laser cutting head 2 moves to the position directly above the water injection chamber 801, the solenoid valve 604 on the branch pipe 605 connected to the water injection chamber 802 is opened, so that the air extraction pipe 6 is connected to the inside of the water injection chamber 802, thereby generating negative pressure inside the water injection chamber 802, and realizing the absorption of waste gas, waste residue and protective gas.

[0048] By setting up multiple collection boxes 8 and dividing the collection boxes 8 into multiple water injection chambers 801, each water injection chamber 801 is controlled by an independent solenoid valve 604, which can reduce the range of air pumping by the main air pump 601, thereby reducing the load on the main air pump 601 and reducing power consumption; and a greater suction force can be generated inside the smaller water injection chamber 801, thereby increasing the amount of protective gas recovered.

[0049] Water can be injected into the bottom of the water injection chamber 801. After the waste residue is blown into the water injection chamber 801, the water can quickly cool the waste residue and buffer it, preventing it from splashing due to rebound and improving the safety performance of the laser cutting machine.

[0050] Further improvements are, see [link / reference] Figure 7 and Figure 8The exhaust pipe 6 extends into the purification chamber 4 and is distributed at the bottom of the purification chamber 4. Multiple exhaust holes 606 are evenly distributed on the outer periphery of the exhaust pipe 6 located inside the purification chamber 4. The purification chamber 4 is provided with an adsorption layer 405, a drying layer 404 and a filter layer 403 arranged sequentially from bottom to top. The exhaust pipe 6 located inside the purification chamber 4 is located inside the adsorption layer 405. The top of the purification chamber 4 is connected to an exhaust pipe 5, which is connected to the top of the purification chamber 4. A first check valve 501 is installed on the exhaust pipe 5.

[0051] In this laser cutting machine, the adsorption layer 405 is filled with clean water at the bottom of the purification chamber 4, and part of the exhaust pipe 6 located inside the purification chamber 4 is immersed in the clean water. The adsorption layer 405 is used to purify the water-soluble harmful gases in the mixed gas containing the protective gas, as well as the waste residue and dust particles generated during cutting. The drying layer 404 is a desiccant used to dry the mixed gas after being washed with clean water. The filter layer 403 is activated carbon used to adsorb some of the harmful gases mixed in the mixed gas. The protective gases commonly used in laser cutting are nitrogen, oxygen and argon. None of these three gases are easily soluble in water and will not be absorbed by activated carbon. Therefore, filtering through the above three filtration methods will not reduce the concentration of the protective gas, and at the same time, it can remove most of the harmful gases, waste residue and dust, which can effectively improve the purity of the protective gas.

[0052] During use, the mixed gas is evenly introduced into the clean water through multiple exhaust ports 606, which improves the uniformity of mixing between the gas and water, enhances the purification effect of the mixed gas, and thus increases the concentration of the protective gas. After drying and further purification, the mixed gas is sent to the exhaust pipe 3 for storage through the exhaust pipe 5. Stones or other materials can be placed in the clean water inside the purification box 4 to allow the mixed gas to better contact with the water as it passes through the gaps between the stones, improving the purification effect. The stones also slow down the rising speed of the mixed gas, reducing splashing on the water surface and extending the service life of the desiccant. The purification box 4 includes a box... The body 401 and the cover 402 are designed to facilitate easy replacement of the filter material inside the body 401 by opening and closing the cover 402. The first check valve 501 installed on the exhaust pipe 5 prevents the gas inside the storage tank 3 from flowing back into the purification box 4, thus ensuring the air pressure inside the storage tank 3. An auxiliary exhaust pump 502 can be installed on the storage tank 5 to assist in exhaust or to perform emergency exhaust in case the main exhaust pump 601 fails, thereby increasing the air pressure inside the storage tank 3. A second check valve 602 can also be installed on the exhaust pipe 6 to prevent the clean water inside the purification box 4 from flowing back into the exhaust pipe 6, and also to maintain the pressure of the storage tank 3.

[0053] Further improvements are, see [link / reference] Figure 6The branch pipe 605 extends into the water injection chamber 801, and the height of the end of the branch pipe 605 is greater than the liquid level in the water injection chamber 801. A baffle 603 covers the end of the branch pipe 605, with a gap between the baffle 603 and the end of the branch pipe 605. The branch pipe 605 being higher than the liquid level in the water injection chamber 801 prevents water from being drawn into the branch pipe 605; the baffle 603 blocks splashed waste residue and dust, reducing the amount of waste residue and dust entering the branch pipe 605, thereby slowing down the wear rate of the filter media inside the purification box 4.

[0054] Further improvements are, see [link / reference] Figure 9 and Figure 10 The laser cutting head 2 includes a laser 201 and a nozzle 202. The outer periphery of the laser 201 is covered by a housing 203. A sealed interlayer 206 is formed between the housing 203 and the outer surface of the laser 201. The interlayer 206 has an air inlet 204 communicating with the air tank 3 and an air outlet 205 communicating with the nozzle 202.

[0055] During use, the mixed gas containing protective gas stored inside the gas tank 3 enters the interlayer 206 through the air inlet 204. After being cooled by clean water, the mixed gas can cool the laser 201. Then, the mixed gas inside the interlayer 206 enters the nozzle 202 through the air outlet 205 and is sprayed out from the nozzle 202 to the cutting part of the raw material steel plate. Since the mixed gas contains a certain concentration of protective gas, the amount of new protective gas injected into the nozzle 202 can be reduced, thereby reducing the consumption of protective gas and lowering the processing cost of the laser cutting machine.

[0056] Further improvements are, see [link / reference] Figure 10 Multiple flow guides 207 are provided inside the interlayer 206, which divide the space between the air inlet 204 and the air outlet 205 into multiple airflow channels. The flow guides 207 allow the mixed gas to be evenly distributed inside the interlayer 206, improving the cooling effect on the laser 201. At the same time, the flow guides 207 increase the heat dissipation area of ​​the laser 201, further improving the cooling effect on the laser 201. The flow guides 207 also serve to support the casing 203, increasing the strength of the casing 203 and thus improving the protection of the laser 201.

[0057] Further improvements are, see [link / reference] Figure 9 and Figure 10A protective sleeve 208 is coaxially arranged around the nozzle 202, and an exhaust port 209 connected to the exhaust pipe 6 is provided on one side of the protective sleeve 208. The shielding provided by the protective sleeve 208 can reduce the splashing of residue and dust, improving the safety of the laser cutting machine; at the same time, the connection between the protective sleeve 208 and the exhaust pipe 6 creates a negative pressure inside the protective sleeve 208, thereby absorbing harmful gases and dust generated during laser cutting, improving the environmental performance of the laser cutting machine; and it can also increase the amount of protective gas recovered, reducing the operating cost of the laser cutting machine.

[0058] A processing technology for elevator counterweights, see [link to relevant documentation] Figure 11 This includes the following steps:

[0059] Step 1, Inspection: Inspect the thickness and flatness of the raw steel plate;

[0060] Step 2, cutting: The raw steel plate is cut using a laser cutting machine to form a counterweight.

[0061] Step 3, Grinding: Grind the counterweight with a grinding machine to remove burrs from the edges of the counterweight.

[0062] Step 4: Leveling. The counterweight is leveled using a hydraulic press.

[0063] Step 5: Spray painting. Spray paint the surface of the counterweight and let it air dry naturally.

[0064] Step 6, quality inspection: inspect the surface defects of the counterweight and weigh the counterweight to check its weight.

[0065] Step 7: Pack the counterweight, wrap it with a film, and secure it with cable ties.

[0066] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. An elevator counterweight processing device, characterized in that, The system includes a cutting table (1), above which a laser cutting head (2) is connected via a moving component (7); a collection box (8) with an open top is located below the cutting table (1); the collection box (8) is connected to a purification tank (4) via an exhaust pipe (6); a main exhaust pump (601) is installed on the exhaust pipe (6); and the purification tank (4) is connected to a gas storage tank (3) via an exhaust pipe (5). The collection box (8) has an internal partition (802) that divides the internal space of the collection box (8) into multiple water-filling chambers. 801), each of the water injection chambers (801) is arranged in a horizontal array, the water injection chambers (801) are connected to the air extraction pipe (6) through a branch pipe (605), and the branch pipe (605) is equipped with a solenoid valve (604); the air extraction pipe (6) extends into the purification box (4) and is distributed at the bottom of the purification box (4), and multiple exhaust holes (606) are evenly distributed on the outer periphery of the part of the air extraction pipe (6) located in the purification box (4); the purification box (4) is provided with an adsorption layer (405), a drying layer (404) and a filter layer (405) in sequence from bottom to top. 03), a portion of the exhaust pipe (6) located inside the purification box (4) is disposed inside the adsorption layer (405). The top of the purification box (4) is connected to an exhaust pipe (5). The exhaust pipe (5) is connected to the top of the purification box (4). The exhaust pipe (5) is equipped with a first check valve (501). The laser cutting head (2) includes a laser (201) and a nozzle (202). The outer periphery of the laser (201) is wrapped with a cover (203). A sealed interlayer (206) is formed between the cover (203) and the outer surface of the laser (201). The interlayer (206) has an air inlet (204) communicating with the gas storage tank (3) and an air outlet (205) communicating with the nozzle (202); the interlayer (206) is provided with a plurality of guide strips (207), which divide the space of the interlayer (206) between the air inlet (204) and the air outlet (205) into a plurality of airflow channels; a protective sleeve (208) is coaxially provided around the nozzle (202), and an air extraction port (209) communicating with the air extraction pipe (6) is provided on one side of the protective sleeve (208).

2. The elevator counterweight processing equipment according to claim 1, characterized in that, The cutting table (1) includes an outer frame (101) and a plurality of mesh plates (102) disposed inside the outer frame (101). The number of collection boxes (8) is equal to that of the mesh plates (102) and they correspond one-to-one. The mesh plates (102) cover the top of the collection boxes (8).

3. The elevator counterweight processing equipment according to claim 1, characterized in that, The branch pipe (605) extends into the water injection chamber (801), and the height of the port of the branch pipe (605) is greater than the liquid level in the water injection chamber (801). A baffle (603) covers the port of the branch pipe (605), and a gap is left between the baffle (603) and the port of the branch pipe (605).

4. A process for processing elevator counterweights, comprising the elevator counterweight processing equipment as described in any one of claims 1-3, characterized in that, Includes the following steps: Step 1, Inspection: Inspect the thickness and flatness of the raw steel plate. Step 2, cutting: The raw steel plate is cut using the elevator counterweight processing equipment to form a counterweight. Step 3, Grinding: Grind the counterweight block with a grinding machine to remove burrs from the edges of the counterweight block; Step 4, leveling: The counterweight is leveled using a hydraulic press; Step 5: Spray painting. Spray paint the surface of the counterweight and allow it to air dry naturally. Step 6, quality inspection: inspect the surface defects of the counterweight and weigh the counterweight to detect its weight; Step 7: Packaging. Wrap the counterweight with a film and secure it with cable ties.

Images