Adjustment of air cushion section, air cushion machine and its air film adjustment method

Abstract

This invention belongs to the technical field of air cushion machines, specifically relating to an adjustable air cushion section, an air cushion machine, and a method for adjusting the air film. The adjustable air cushion section is characterized by comprising: an adjustable air chamber, with an adjustable groove and a cover plate above the chamber; a conveyor belt above the adjustable groove; a venting assembly, including an openable vent hole on the adjustable groove, the vent hole communicating with the outside of the adjustable air chamber; a detection assembly disposed on the cover plate for detecting the suspension height of the conveyor belt; and an adjustable variable frequency fan disposed on the adjustable air chamber. The air cushion machine includes the aforementioned adjustable air cushion section. The air film adjustment method of the air cushion machine is implemented using the aforementioned air cushion machine. This invention solves the technical problem of existing air cushion machines where the belt rubs against the cover plate or feed shoe during startup, affecting the stable operation of the equipment.

Description

Technical Field

[0001] This invention belongs to the technical field of air cushion machines, specifically relating to an adjustable air cushion section. This invention also relates to an air cushion machine, including the aforementioned air cushion section. Furthermore, this invention relates to a method for adjusting the air film of an air cushion machine. Background Technology

[0002] Air cushion conveyors are widely used in the bulk grain conveying industry. Their main working principle is as follows: when an air source provides air with a certain pressure and flow rate into the air chamber, the air overflows through the throttling holes on the disc groove, forming a pressurized air film, called an air cushion, between the conveyor belt and the disc groove, supporting the conveyor belt and the material above it. This transforms the rolling friction of ordinary belt conveyors into fluid friction using air as the medium, reducing operating resistance and lowering overall energy consumption. Its main advantage is flexible process layout. However, when site space constraints necessitate localized inclines, the conveyor belt, the main traction component, is affected by head tension. During the instantaneous start-up of the equipment, the conveyor belt is straightened at the concave arc section. Combined with the airflow overflowing from the air groove holes, this can cause the belt to rub against the cover plate or feed shoe, thus affecting the stable operation of the equipment. Summary of the Invention

[0003] The purpose of this invention is to provide an adjustable air cushion section to solve the technical problem that when the belt of an existing air cushion machine starts up, it rubs against the cover plate or feed shoe, affecting the stable operation of the equipment.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: adjusting the air cushion section, characterized in that it includes: An regulating air chamber is provided above which an regulating disc groove and a cover plate are provided; a conveyor belt is provided above the regulating disc groove. The venting assembly includes a switchable vent hole on the adjusting plate groove, the vent hole being connected to the outside of the adjusting air chamber; A detection component, disposed on the cover plate, is used to detect the suspension height of the conveyor belt; A variable frequency fan is installed on the regulating air chamber; When the detection component detects that the conveyor belt is suspended beyond the safe height, the vent opens to reduce the suspension height of the conveyor belt; When the detection component detects that the conveyor belt is suspended within a safe height, the vent is closed.

[0005] When the equipment starts under no-load conditions, the conveyor belt is rapidly lifted and detached from its original trough state due to the tension of the head drive roller. At this time, the system fan is still running. As the conveyor belt floats up, the two sides of the conveyor belt and the upper trough form a sealed cavity. The air volume in the sealed cavity increases, and the lack of outlet causes the conveyor belt to rise. A detection component is set at the limit safe height of the conveyor belt's float. When the detection component sends a signal, the vent opens, and the airflow in the sealed cavity is discharged from the vent of the trough, thereby reducing the redundant air volume in the sealed cavity, causing the conveyor belt to descend, and ensuring that the conveyor belt does not rub against the cover plate when it floats up, allowing it to operate normally.

[0006] To address the technical problem of how to implement the venting component, the present invention adopts the following technical solution: the venting component includes a venting pipe and a valve; the venting pipe is installed on the venting hole; the end of the venting pipe extends out of the regulating air chamber, and a valve is installed on the venting pipe outside the regulating air chamber.

[0007] To address the technical problem of how to arrange the detection components, the present invention adopts the following technical solution, wherein the detection components include: The first detection component is disposed on one side of the cover plate and is used to detect the suspension height of one side of the conveyor belt; The second detection component is located on the other side of the cover plate and is used to detect the suspension height of the other side of the conveyor belt.

[0008] To address the technical problem of how the detection component is implemented, the present invention adopts the following technical solution, wherein the first detection component and the second detection component have the same structure; the first detection component includes: The detection housing is detachably mounted on the cover plate; The sensor is mounted on the detection housing; An elastic protective element is provided on the detection housing to protect the sensor.

[0009] To solve the technical problem of low exhaust efficiency of a single vent hole, the present invention adopts the following technical solution: the vent holes are symmetrically arranged on both sides of the adjusting plate groove; The number of vent holes on the adjustment plate groove on one side is two or more.

[0010] A second objective of the present invention is to provide an air cushion machine, comprising air cushion sections, characterized in that an adjustable air cushion section as described in any of the above claims is provided between adjacent air cushion sections; the air cushion sections are spaced apart from the adjustable air cushion sections.

[0011] To address the technical problem of low adjustment efficiency of a single adjustment air cushion segment, the present invention adopts the following technical solution, wherein the number of adjustment air cushion segments is two or more.

[0012] To further address the technical problem of conveyor belt rubbing against the cover plate or feed shoe, affecting the stable operation of the equipment, the present invention adopts the following technical solution: the air cushion machine further includes a belt pressing mechanism, which is disposed above the air cushion section. The belt pressing mechanism includes: Mounting housing, wherein a rotating shaft is provided on the mounting housing; The pressure roller is mounted on the rotating shaft.

[0013] The concave arc section air chamber is disconnected from the conventional air chamber and equipped with an independent fan control system. A certain cross-section vent hole is opened in the upper plate groove of the middle section of the concave arc, which is connected to the outside of the air chamber through a vent pipe. An automatic regulating valve is installed at the end of the vent pipe. A belt pressing mechanism is then installed above the conveyor belt, which can effectively solve the problem of the conveyor belt suspending in the concave arc section and rubbing against the cover plate and feeding device, thus ensuring the stable operation of the equipment.

[0014] To solve the technical problem of difficulty in adjusting the distance between the pressure roller and the conveyor belt, the present invention adopts the following technical solution: the belt pressing mechanism further includes an adjusting component for adjusting the distance between the pressure roller and the conveyor belt.

[0015] To address the technical problem of how the adjustment component is implemented, the present invention adopts the following technical solution, wherein the adjustment component includes: The mounting housing is provided with a first adjustment hole. A mounting bracket is provided on the mounting housing; A movable frame is used to mount the rotating shaft; the rotating shaft is disposed in the first adjusting hole; the movable frame is connected to the fixed frame via an adjusting screw and an adjusting nut.

[0016] To accommodate various material conveying conditions, the height of the pressure roller relative to the conveyor belt can be quickly adjusted on-site by rotating the adjusting nut. This ensures both the safety of the conveyor belt's operating height and the equipment's conveying capacity for different materials.

[0017] To further address the technical issue of how to implement the adjustment component, the present invention adopts the following technical solution: a first adjustment hole is provided on the mounting housing for mounting the movable frame on the mounting housing via a first connecting component; The fixing frame is provided with a second adjustment hole; The movable frame is provided with a second adjustment hole; the adjustment screw is provided in the second adjustment hole and the second adjustment hole.

[0018] To address the technical problem of not being able to determine the distance between the pressure roller and the conveyor belt, the present invention adopts the following technical solution: an observation component is provided on the top of the mounting housing for observing the distance between the pressure roller and the conveyor belt.

[0019] To solve the technical problem of how to arrange the adjustable air cushion section, the present invention adopts the following technical solution: the air cushion machine is a climbing air cushion machine, which includes a horizontal section, a concave arc section, and a climbing section, and the adjustable air cushion section is set in the concave arc section of the climbing air cushion machine.

[0020] To address the technical problem of how to arrange the belt pressing mechanism, the present invention adopts the following technical solution: the belt pressing mechanism is located behind the last adjusting air cushion section arranged along the conveying direction.

[0021] A third objective of the present invention is to provide a method for adjusting the air film of an air cushion machine, characterized in that it is implemented using an air cushion machine as described in any of the above claims.

[0022] To address the technical problem of how to adjust under no-load conditions, this invention adopts the following technical solution, wherein the adjustment method includes: Setting: When the conveyor belt is conveying material, the target frequency of the variable frequency drive fan is P. 目标 The frequency of the variable frequency fan under no-load conditions is P. 空载 ; There is no continuous feed signal from upstream, indicating an idle operating condition; Variable frequency drive fan frequency reduced to P 空载 run; The electric valve is normally closed; when the detection component detects that the conveyor belt is suspended to the set maximum height H... max At this time, open the valve to release air; the conveyor belt falls back, and when the conveyor belt floats to a height H... 实时 <H max At that time, set a delay T 延 The valve is closed after the valve is closed.

[0023] To address the technical problem of adjusting the feeding conditions at the start of the horizontal section, the present invention adopts the following technical solution, wherein the adjustment method further includes: When the upstream feed detection component detects the feed signal for the first time, it is recorded as t0, and it is determined that the horizontal section has started feeding. Calculate the time t1 for the material head to reach the concave arc section based on the conveyor belt speed V and the distance L between the feed inlet and the concave arc section. t1 = t0 + L / V; At time t1-Δt, the frequency converter fan is raised to the target frequency P. 目标 This allows the air film pressure to reach the set pressure p. 目标 Δt is the advance time; close the valve, stop the leakage, and maintain pressure.

[0024] To address the technical problem of adjusting the operating conditions under full load with material, the present invention adopts the following technical solution, wherein the adjustment method further includes: When the upstream feed detection component continuously detects the feed signal, the feed duration t 进>t1, material is continuously conveyed, which is determined to be a full-load material-carrying condition; Variable frequency drive fan maintains target frequency P 目标 Stable operation, providing continuous and stable air film support; valves remain closed.

[0025] To address the technical problem of adjusting the tail-end discharge conditions, this invention adopts the following technical solution, wherein the adjustment method further includes: When the upstream feed detection component fails to detect the feed signal, it is recorded as t2 and determined to be the tail section discharge condition; Calculate the time t3 for the material tail to reach the concave arc section based on the conveyor belt speed V and the distance L between the feed inlet and the concave arc section; t3 = t2 + L / V; After the material tail leaves the concave arc section, the variable frequency drive fan smoothly and gradually decreases to P. 空载 To avoid sudden power drop leading to instantaneous instability of the air film; When the detection component detects that the conveyor belt is suspended at the set maximum height H max At this time, the valve is opened to release air, and the conveyor belt falls back; When the conveyor belt is suspended at height H 实时 <H max At that time, set a delay T 延 The valve is closed after the valve is closed.

[0026] To solve P 空载 To address the technical issue of how to achieve this, the present invention adopts the following technical solution: the target frequency of the variable frequency regulating fan is P. 目标 The P 空载 =P 目标 × (30%-40%). Attached Figure Description

[0027] Figure 1 This is a perspective view of the adjustable air cushion section of the present invention; Figure 2 This is a schematic diagram of the structure of the adjustable air cushion section of the present invention (the position of the conveyor belt during normal operation); Figure 3 This is a schematic diagram of the structure of the adjustable air cushion section of the present invention (position of the conveyor belt when suspended); Figure 4 This is a schematic diagram of the structure of the deflation component of the air cushion section of the present invention; Figure 5 This is a schematic diagram of the structure of the detection component for adjusting the air cushion section of the present invention; Figure 6 This is a front view of the air cushion machine of the present invention; Figure 7 This is a top view of the air cushion machine of the present invention; Figure 8 This is a perspective view of the belt pressing mechanism of the present invention; Figure 9 This is a side view of the pressing mechanism of the present invention; Figure 10 This is a schematic diagram of the pressing mechanism of the present invention. Figure 1 ; Figure 11 This is a schematic diagram of the pressing mechanism of the present invention. Figure 2 ; In the diagram: 10 concave arc segments; 100 Adjustable air cushion section; 110 Adjustable air chamber; 120 Adjustable disc groove; 121 Air hole; 122 Vent hole; 130 Cover plate; 140 Adjustable variable frequency fan; 150 Vent assembly; 151 Vent pipe; 152 Valve; 160 Detection assembly; 161 Detection housing; 162 Sensor; 163 Elastic protective component; 170 Lower disc groove; 180 Return air chamber; 190 Air film; 200 air cushion segment; 300 Pressing mechanism; 310 Mounting housing; 311 Mounting side plate; 3111 First adjusting hole one; 3112 First adjusting hole two; 312 Mounting cover plate; 320 Rotating shaft; 321 Bearing with seat; 330 Pressing roller; 340 Adjusting assembly; 341 Fixed frame; 342 Movable frame; 3420 Second adjusting hole two; 343 Adjusting screw; 344 Adjusting nut; 345 First connecting assembly; 346 Observation assembly; 400 conveyor belt; 500 material. Detailed Implementation

[0028] The invention will now be further described with reference to the accompanying drawings. Example 1

[0029] like Figure 1-5 As shown, the regulating air cushion section 100 includes a regulating air chamber 110, a regulating disc groove 120, a cover plate 130, a regulating variable frequency fan 140, and a venting assembly 150.

[0030] An regulating disc groove 120 and a cover plate 130 are provided above the regulating air chamber 110. A conveyor belt 400 is provided above the regulating disc groove 120. A regulating variable frequency fan 140 is installed on the regulating air chamber 110.

[0031] The venting assembly 150 includes an adjustable vent 122 on the adjusting plate groove 120, which is connected to the outside of the adjusting air chamber 110.

[0032] In one embodiment, the venting assembly 150 includes a venting pipe 151 and a valve 152; the venting pipe 151 is provided on the venting hole 122; the end of the venting pipe 151 extends out of the regulating air chamber 110, and the valve 152 is provided on the venting pipe 151 outside the regulating air chamber 110.

[0033] The detection component 160 is mounted on the cover plate 130 and is used to detect the suspension height of the conveyor belt.

[0034] In one embodiment, the detection component 160 includes a first detection component and a second detection component. The first detection component is disposed on one side of the cover plate and is used to detect the suspension height of one side of the conveyor belt; the second detection component is disposed on the other side of the cover plate and is used to detect the suspension height of the other side of the conveyor belt.

[0035] Specifically, the first detection component and the second detection component have the same structure. The first detection component 160 includes a detection housing 161, a sensor 162, and an elastic protective element 163. The detection housing 161 is detachably mounted on the cover plate 130; the sensor 162 is mounted on the detection housing 161; the elastic protective element 163 is provided on the detection housing 161 to protect the sensor. The sensor 162 is preferably an inductive sensor. The elastic protective element 163 is preferably a silicone rubber component.

[0036] When the detection component 160 detects that the conveyor belt 400 is suspended to a safe height, the vent 122 opens, the air film 190 deflates, and the suspension height of the conveyor belt 400 is reduced; when the detection component 160 detects that the conveyor belt 400 is suspended within the safe height, the vent 122 closes, and the air film 190 maintains pressure.

[0037] This invention uses a frequency converter to control the fan motor. When the equipment is unloaded, the system only needs to overcome the gravity of the conveyor belt, and the required air volume is small. At this time, the frequency of the fan motor is reduced, the fan speed decreases, and the fan shaft power is greatly reduced (cubic-level energy saving). When the equipment is carrying material, the frequency converter increases the frequency and speed to meet the air chamber pressure increase and air film formation, ensuring stable operation of the equipment after material is carried.

[0038] To ensure stable equipment operation, one or more sets of regulating air cushion sections are arranged in the middle section of the concave arc. Multiple vent holes are designed on the groove of the regulating air cushion section, and a vent pipe is designed between the groove and the shell of the regulating air chamber. Multiple valves are installed below the vent pipe, preferably electric ball valves.

[0039] The cover plate is equipped with a detection component, which consists of a detection housing, an elastic protective element, and a sensor. The elastic protective element protects the sensor and has the characteristics of wear resistance, flexural resistance, and tear resistance. To ensure reliability, its hardness is designed to be Shore A30±5.

[0040] When the equipment starts under no-load, the conveyor belt is rapidly lifted and detached from its original trough state due to the tension of the head drive roller. At this time, the system fan is still running. As the conveyor belt floats up, the two sides of the conveyor belt and the upper trough form a sealed cavity. The air volume in the sealed cavity increases, and the lack of outlet causes the conveyor belt to rise. A detection component is set at the limit safe height of the conveyor belt's float. When the detection component sends a signal, the electric ball valve below the vent pipe will automatically open. The airflow in the sealed cavity will quickly flow into the vent pipe from the vent hole of the upper trough and be discharged through the electric ball valve, thereby reducing the redundant air volume in the sealed cavity, causing the conveyor belt to descend, and ensuring that the conveyor belt does not rub against the cover plate when it floats up, allowing it to operate normally.

[0041] When material 500 enters conveyor belt 400, the conveyor belt sinks and returns to the shape of the upper trough. The airflow overflows from the upper trough to support the conveyor belt. The airflow quickly overflows to both sides of the conveyor belt between the conveyor belt and the upper trough. An air film with a thick middle and thin sides is formed between the two edges of the conveyor belt and the upper trough. At this time, the pressure value in the system rises rapidly and then tends to stabilize. After the electric ball valve is closed, there is enough air volume and air pressure to support the conveyor belt and the material, thereby ensuring the stability of the equipment operation when carrying material. Example 2

[0042] like Figure 6 , Figure 7 As shown, the air cushion machine includes air cushion sections 200, and an adjustable air cushion section 100 of any of Embodiment 1 is provided between adjacent air cushion sections 200. The air cushion sections 200 and the adjustable air cushion sections 100 are spaced apart.

[0043] In one embodiment, the number of adjustable air cushion segments 100 is two or more. Adjacent air cushion segments 100 are spaced apart.

[0044] In one embodiment, the air cushion machine further includes a belt pressing mechanism 300 disposed above the air cushion section 200. Specifically, as... Figures 8-11 As shown, the pressing mechanism 300 includes a mounting housing 310, a rotating shaft 320, and a pressing roller 330. The rotating shaft 320 is mounted on the mounting housing 310; the pressing roller 330 is mounted on the rotating shaft 320.

[0045] In one embodiment, the belt pressing mechanism 300 further includes an adjusting component 340 for adjusting the distance between the pressure roller 330 and the conveyor belt 400. Specifically, the adjusting component 340 includes a fixed frame 341, a movable frame 342, an adjusting screw 343, and an adjusting nut 344.

[0046] The mounting housing 310 includes a mounting side plate 311 and a mounting cover plate 312. A first adjustment hole 3111 is provided on the mounting housing 310. Specifically, the first adjustment hole 3111 is machined on the mounting side plate 311. A fixing bracket 341 is provided on the mounting housing 310.

[0047] The movable frame 342 is used to mount the rotating shaft 320; both ends of the rotating shaft 320 are supported on the bearings 321, which are mounted on the movable frame 342. The rotating shaft 320 is disposed in the first adjusting hole 3111.

[0048] In one embodiment, a first adjustment hole 3112 is provided on the mounting housing 310 for mounting the movable frame 342 on the mounting housing 310 via the first connecting assembly 345. A second adjustment hole 1 is provided on the fixed frame 341; a second adjustment hole 2 3420 is provided on the movable frame 342.

[0049] The movable frame 342 is connected to the fixed frame 341 via adjusting screws 343 and adjusting nuts 344. Adjusting screws 343 are installed in the second adjusting hole 1 and the second adjusting hole 2 3420.

[0050] In one embodiment, an observation component 346 is provided on the top of the mounting housing 310 for observing the distance between the pressure roller and the conveyor belt.

[0051] In one embodiment, the air cushion machine is an incline air cushion machine, which includes a horizontal section, a concave arc section 10, and an incline section. The adjustable air cushion section is located in the concave arc section of the incline air cushion machine.

[0052] In one embodiment, the belt pressing mechanism 300 is located behind the last adjusting air cushion section 100 arranged along the conveying direction.

[0053] This invention employs an adjustable-height pressure roller mechanism. When conveying materials of different densities, and with a concave arc section in the process layout, the material accumulation height will vary for the same conveying capacity. The height of the material relative to the pressure roller can be observed through a top observation component. If the pressure roller is too low, the material will be dispersed and scattered to both sides of the conveyor belt. The pressure roller mechanism has a first waist-shaped adjustment hole on each side mounting plate. Two pressure rollers are mounted on the mounting side plate via a rotating shaft, and their ends are fixed with seated bearings. A second adjustment hole is provided on the fixed frame. The movable frame is located outside the mounting side plate, and after installation, it can cover the first waist-shaped adjustment holes one and two on the mounting side plate, providing dust and water protection. The outer circumference of the pressure roller has grooved rubber to reduce friction on the conveyor belt and extend the service life of both the conveyor belt and the pressure roller. To adapt to various material conveying conditions, the height of the pressure roller relative to the conveyor belt can be quickly adjusted on-site by rotating the adjusting nut, ensuring both the safety of the conveyor belt's operating height and the conveying capacity of the equipment for different materials.

[0054] The concave arc section air chamber is disconnected from the conventional air chamber and equipped with an independent fan control system. A certain cross-section vent hole is opened in the upper plate groove of the middle section of the concave arc, which is connected to the outside of the air chamber through a vent pipe. An automatic regulating valve is installed at the end of the vent pipe. An adjustable belt pressing mechanism is also configured above the conveyor belt. This effectively solves the problem of the conveyor belt suspending in the concave arc section and rubbing against the cover plate and feeding device, ensuring the stable operation of the equipment. Example 3

[0055] The air cushion machine air film adjustment method is implemented using any one of the air cushion machines in Example 2.

[0056] In one embodiment, the adjustment method includes: Setting: When the conveyor belt is conveying material, the target frequency of the variable frequency drive fan is P. 目标 The frequency of the variable frequency fan under no-load conditions is P. 空载 ; There is no continuous feed signal from upstream, indicating an idle operating condition; Variable frequency drive fan frequency reduced to P 空载 During operation, the conveyor belt in the concave arc section will not sag and contact the lower trough due to the weakening of the air film; The electric valve is normally closed; when the detection component detects that the conveyor belt is suspended to the set maximum height H... max At this time, open the valve to release air; the conveyor belt falls back, and when the conveyor belt floats to a height H... 实时 <H max At that time, set a delay T 延 The valve is closed after the valve is closed.

[0057] In one embodiment, the target frequency of the variable frequency drive fan is P. 目标 P 空载 =P 目标 × (30%-40%).

[0058] No-load operating condition objective: To suppress conveyor belt drifting under no-load conditions in the most energy-efficient state.

[0059] In one embodiment, the adjustment method further includes: When the upstream feed detection component detects the feed signal for the first time, it is recorded as t0, and it is determined that the horizontal section has started feeding. Calculate the time t1 for the material head to reach the concave arc section based on the conveyor belt speed V and the distance L between the feed inlet and the concave arc section. t1 = t0 + L / V; At time t1-Δt, the frequency converter fan is raised to the target frequency P. 目标 This allows the air film pressure to reach the set pressure p. 目标 Δt is the advance time; close the valve, stop the leakage, and maintain pressure.

[0060] Initial feeding condition objective: The air film is positioned before the material to smoothly receive the incoming material, preventing the conveyor belt from collapsing and spilling material due to "material arriving first, air film not following".

[0061] In one embodiment, the adjustment method further includes: When the upstream feed detection component continuously detects the feed signal, the feed duration t 进 >t1, material 500 is continuously conveyed, which is judged as a full-load material-carrying condition; the goal of the full-load material-carrying condition is: the air film stably supports the material to ensure the rated capacity and stable operation. Variable frequency drive fan maintains target frequency P 目标 Stable operation, providing continuous and stable air film support; valves remain closed.

[0062] In one embodiment, the adjustment method further includes: When the upstream feed detection component fails to detect the feed signal, it is recorded as t2 and determined to be the tail section discharge condition; Calculate the time t3 for the material tail to reach the concave arc section based on the conveyor belt speed V and the distance L between the feed inlet and the concave arc section; t3 = t2 + L / V; After the material tail leaves the concave arc section, the variable frequency drive fan smoothly and gradually decreases to P. 空载 To avoid sudden power drop leading to instantaneous instability of the air film; When the detection component detects that the conveyor belt is suspended at the set maximum height H max At this time, the valve is opened to release air, and the conveyor belt falls back; When the conveyor belt is suspended at height H 实时 <H max At that time, set a delay T 延 The valve is closed after the valve is closed.

[0063] When the material tail leaves and the conveyor belt loses the material pressure and may rebound, a short-term auxiliary pulse venting is used to eliminate the rebound. After the material is confirmed to be exhausted, the system switches to the no-load on-demand venting mode.

[0064] The goal of the tail section discharge condition is to smoothly transition back to no load, suppress the rebound and floating of the conveyor belt after discharge, and avoid the tail material from spilling.

[0065] The concave arc section is equipped with an independent fan, while the other sections share a single fan.

[0066] This invention facilitates precise adjustment of the suspension height of the concave arc section conveyor belt during the local ramping process of the air cushion machine, ensuring normal operation of the equipment when unloaded.

[0067] This invention facilitates precise adjustment of the system's fan volume and pressure, ensuring normal operation of the equipment during material handling.

[0068] This invention facilitates precise adjustment of the air volume and air pressure of the system fan, reduces fan energy consumption during no-load operation, saves energy and reduces emissions, and lowers user operating costs.

[0069] This invention facilitates precise adjustment of the conveyor belt running height to ensure safety and production capacity when conveying different materials.

[0070] The above embodiments are only for illustrating the technical features and concepts of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and embodiments of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An adjustable air cushion section, characterized in that, include: A regulating air chamber, wherein an regulating plate groove and a cover plate are provided above the regulating air chamber; A conveyor belt is installed above the regulating disc groove; The venting assembly includes a switchable vent hole on the adjusting plate groove, the vent hole being connected to the outside of the adjusting air chamber; A detection component, disposed on the cover plate, is used to detect the suspension height of the conveyor belt; A variable frequency fan is installed on the regulating air chamber; When the detection component detects that the conveyor belt is suspended beyond the safe height, the vent opens to reduce the suspension height of the conveyor belt; When the detection component detects that the conveyor belt is suspended within a safe height, the vent is closed.

2. The adjustable air cushion section according to claim 1, characterized in that, The venting assembly includes a venting pipe and a valve; the venting pipe is installed on the venting hole; the end of the venting pipe extends out of the regulating air chamber, and the valve is installed on the venting pipe outside the regulating air chamber.

3. The adjustable air cushion section according to claim 1 or 2, characterized in that, The detection component includes: The first detection component is disposed on one side of the cover plate and is used to detect the suspension height of one side of the conveyor belt; The second detection component is located on the other side of the cover plate and is used to detect the suspension height of the other side of the conveyor belt.

4. The adjustable air cushion section according to claim 3, characterized in that, The first detection component has the same structure as the second detection component; the first detection component includes: The detection housing is detachably mounted on the cover plate; The sensor is mounted on the detection housing; An elastic protective element is provided on the detection housing to protect the sensor.

5. The adjustable air cushion section according to claim 2, characterized in that, The vent holes are symmetrically arranged on both sides of the adjusting plate groove; The number of vent holes on the adjustment plate groove on one side is two or more.

6. An air cushion machine, including an air cushion section, characterized in that, An adjustable air cushion section as described in any one of claims 1-5 is provided between adjacent air cushion sections; the air cushion sections are spaced apart from each other.

7. The air cushion machine according to claim 6, characterized in that, The number of the regulating air cushion sections is two or more.

8. The air cushion machine according to claim 6, characterized in that, The air cushion machine also includes a belt pressing mechanism disposed above the air cushion section, the belt pressing mechanism comprising: Mounting housing, wherein a rotating shaft is provided on the mounting housing; The pressure roller is mounted on the rotating shaft.

9. The air cushion machine according to claim 8, characterized in that, The belt pressing mechanism also includes an adjustment component for adjusting the distance between the pressure roller and the conveyor belt.

10. The air cushion machine according to claim 9, characterized in that, The adjustment component includes: The mounting housing is provided with a first adjustment hole. A mounting bracket is provided on the mounting housing; A movable frame is used to mount the rotating shaft; the rotating shaft is disposed in the first adjusting hole; the movable frame is connected to the fixed frame via an adjusting screw and an adjusting nut.

11. The air cushion machine according to claim 10, characterized in that, The mounting housing is provided with a second first adjustment hole for mounting the movable frame on the mounting housing via a first connecting component. The fixing frame is provided with a second adjustment hole; The movable frame is provided with a second adjustment hole; the adjustment screw is provided in the second adjustment hole and the second adjustment hole.

12. The air cushion machine according to claim 8, characterized in that, An observation component is provided on the top of the mounting housing for observing the distance between the pressure roller and the conveyor belt.

13. The air cushion machine according to claim 6, characterized in that, The air cushion machine is an incline air cushion machine, which includes a horizontal section, a concave arc section, and an incline section. The adjustable air cushion section is located in the concave arc section of the incline air cushion machine.

14. The air cushion machine according to claim 8, characterized in that, The pressing mechanism is located behind the last adjusting air cushion section arranged along the conveying direction.

15. An air cushion machine air film adjustment method, characterized in that, This is achieved using the air cushion machine described in any one of claims 6-15.

16. The air film adjustment method for an air cushion machine according to claim 15, characterized in that, The adjustment method includes: Setting: When the conveyor belt is conveying material, the target frequency of the variable frequency drive fan is P. 目标 The frequency of the variable frequency fan under no-load conditions is P. 空载 ; There is no continuous feed signal from upstream, indicating an idle operating condition; Variable frequency drive fan frequency reduced to P 空载 During operation, the conveyor belt in the concave arc section will not sag and contact the lower trough due to the weakening of the air film; The electric valve is normally closed; when the detection component detects that the conveyor belt is suspended to the set maximum height H... max At this time, open the valve to release air; the conveyor belt falls back, and when the conveyor belt floats to a height H... 实时 <H max At that time, set a delay T 延 The valve is closed after the valve is closed.

17. The air film adjustment method for an air cushion machine according to claim 15, characterized in that, The adjustment method further includes: When the upstream feed detection component detects the feed signal for the first time, it is recorded as t0, and it is determined that the horizontal section has started the feeding condition. Calculate the time t1 for the material head to reach the concave arc section based on the conveyor belt speed V and the distance L between the feed inlet and the concave arc section. t1 = t0 + L / V; At time t1-Δt, the frequency converter fan is raised to the target frequency P. 目标 This allows the air film pressure to reach the set pressure p. 目标 Δt is the advance time; close the valve, stop the leakage, and maintain pressure.

18. The air film adjustment method for an air cushion machine according to claim 15, characterized in that, The adjustment method further includes: When the upstream feed detection component continuously detects the feed signal, the feed duration t 进 >t1, material is continuously conveyed, which is determined to be a full-load material-carrying condition; Variable frequency drive fan maintains target frequency P 目标 Stable operation, providing continuous and stable air film support; valves remain closed.

19. The air film adjustment method for an air cushion machine according to claim 15, characterized in that, The adjustment method further includes: When the upstream feed detection component fails to detect the feed signal, it is recorded as t2 and determined to be the tail section discharge condition; Calculate the time t3 for the material tail to reach the concave arc section based on the conveyor belt speed V and the distance L between the feed inlet and the concave arc section; t3 = t2 + L / V; After the material tail leaves the concave arc section, the variable frequency drive fan smoothly and gradually decreases to P. 空载 To avoid sudden power drop leading to instantaneous instability of the air film; When the detection component detects that the conveyor belt is suspended at the set maximum height H max At this time, the valve is opened to release air, and the conveyor belt falls back; When the conveyor belt is suspended at height H 实时 <H max At that time, set a delay T 延 The valve is closed after the valve is closed.

20. The air cushion machine air film adjustment method according to claim 16, characterized in that, The target frequency of the variable frequency fan is P. 目标 The P 空载 =P 目标 × (30%-40%).

Images