A pneumatic conveying open silo vacuum release device

Abstract

The present invention provides a pneumatic conveying open silo vacuum release device, including: a bottom plate of the top measuring hole of the silo, an audible and visual alarm, a time relay, a rotating seat, etc. The present invention overcomes the deficiencies of the prior art. Through the audible and visual alarm, the steel ball and the torsion spring, when the material level in the silo or the bin is higher than the set warning material level, after the steel ball contacts the material level, the tension of the steel wire rope becomes a slack state, the weight of the cover plate is reduced, and the torsion spring can open the silo cover through its own elastic force to release the pressure in the silo, avoiding the occurrence of explosion accidents. In order to prevent the material level from always being at a high level, through the audible and visual alarm, the sound and light emitted are used to remind the on-duty personnel to check in time to prevent the internal materials from overflowing the silo or the bin.

Description

Technical Field

[0001] The present invention belongs to the technical field of material storage, and relates to a pneumatic conveying open silo vacuum release device. Background Art

[0002] The function of the silo vacuum release device is to ensure the pressure balance inside the silo and prevent structural deformation, damage or seal failure caused by negative pressure. It can effectively solve the problems that may occur during the material unloading process of the silo, and ensure the safe and stable operation of the silo. The installation of the silo is an important link in the powder material storage industry. When choosing a suitable installation location for the silo, it is necessary to consider the storage requirements and technological process. It is necessary to take into account the surrounding environment and the layout of the equipment to ensure safe and convenient operation. The powder material storage industry refers to the related industries involved in the storage, management and processing of powder materials. These powder materials can be in the form of powders of various bulk materials, such as fly ash, cement, ore powder, flour, chemical raw materials, etc. Raw material storage refers to the reasonable storage and management of the raw materials required during the production process to ensure the quality, safety and supply reliability of the raw materials.

[0003] According to the publication number: CN106768596B, a method for safety monitoring of the positive and negative pressure of a silo body. It includes the following effective steps: a. First, determine the installation position of the vacuum release valve according to the radius of the silo; b. Then determine the ventilation diameter of the silo; c. Then determine the number of vacuum release valves; d. Install a silo pressure detection device on the silo to detect the pressure inside the silo; e. According to the results detected by the pressure detection device, control the vacuum release valve to adjust the pressure inside the silo. Compared with the prior art, the advantages and positive effects of the present invention are that the present invention provides a method for safety monitoring of the positive and negative pressure of a silo body, uses a scientific calculation method to determine the position and number of vacuum release valves, and then determines the position of the pressure detection device according to the vacuum release valve, so as to achieve the purpose of controlling the vacuum release valve, and further keep the inside of the silo body in a slightly negative pressure state at all times to ensure the safety of the silo; however, the existing vacuum release devices still have the following defects in actual use:

[0004] 1. Currently, for the consideration of cost reduction, efficiency improvement and maximization of economic benefits, the ash conveying pipelines of the 125MW unit and the 300MW unit in the high-position silo pipe network are connected and merged into the 300MW pressure-reducing silo only in the 24-meter pressure-reducing bin. Currently, the pressure-reducing silo is operating well. Next, the iron extraction process of fly ash is going to merge the 350MW ash conveying pipeline into the 300MW pressure-reducing silo as well. In this case, it is necessary to consider the problem of whether the three ash conveying energies can operate safely in one pressure-reducing silo barrel.

[0005] 2. When the material level in the bin or silo is high, the bin cover is opened through the linkage mechanism to release the pressure in the bin. However, when the material level remains high and the equipment dust removal load has not been increased for a long time, the high level will become higher and higher, resulting in the internal material overflowing from the bin or silo, which is not convenient to timely remind the post personnel to check or solve the problem of high material level in time. Summary of the Invention

[0006] The purpose of the present invention is to provide a pneumatic conveying open silo vacuum release device for the problems existing in the prior art, so as to solve the problems of the existing vacuum release device in the use process mentioned in the above background technology.

[0007] For this reason, the present invention adopts the following technical solutions:

[0008] A pneumatic conveying open silo vacuum release device, comprising:

[0009] The bottom plate of the roof measuring hole, which is the main body of the new vacuum release device;

[0010] An audible and visual alarm, which is arranged above the bottom plate of the roof measuring hole;

[0011] A time relay, which is arranged above the bottom plate of the roof measuring hole;

[0012] A rotating seat, which is connected to the surface of the bottom plate of the roof measuring hole;

[0013] A connecting plate, which is connected to the surface of the rotating seat through a rotating shaft;

[0014] A torsion spring, which is sleeved on the surface of the rotating shaft;

[0015] A measuring material level hole cover plate, which is connected to one side of the connecting plate;

[0016] A measuring material level hole base, which is installed on the surface of the bottom plate of the roof measuring hole;

[0017] A proximity switch, which is arranged on the surface of the measuring material level hole base;

[0018] An iron sheet, which is arranged at the bottom of the measuring material level hole cover plate;

[0019] A safety rope hole, which is arranged at the bottom of the measuring material level hole cover plate;

[0020] A steel wire rope, which is connected to the bottom of the safety rope hole;

[0021] A steel ball, which is connected to the other end of the steel wire rope.

[0022] Preferably, the measuring material level hole base further includes:

[0023] A positioning slider, which is arranged on the side surface of the base of the measuring material level hole;

[0024] A concave block, which is arranged on the side surface of the base of the measuring material level hole.

[0025] Preferably, the cover plate of the measuring material level hole further comprises:

[0026] A handle, which is installed on the surface of the cover plate of the measuring material level hole;

[0027] An upper cover clamping block, which is connected to one side of the cover plate of the measuring material level hole;

[0028] The torsion spring is located between the rotating seat and the connecting plate.

[0029] Preferably, the sliding column further comprises:

[0030] A slider, which is connected to the surface of the sliding column through a sliding groove;

[0031] A positioning hole, which is opened on the side surface of the positioning slider;

[0032] The slider and the positioning hole are adapted to each other.

[0033] Preferably, the concave block further comprises:

[0034] A sliding column, which is arranged inside the concave block;

[0035] The proximity switch is in contact with the iron sheet.

[0036] Preferably, the bottom plate of the silo top measuring hole further comprises:

[0037] A perforated plate, which is installed inside the bottom plate of the silo top measuring hole;

[0038] The steel wire rope is located in the hole of the perforated plate.

[0039] Preferably, the bottom plate of the silo top measuring hole further comprises:

[0040] A storage battery, which is installed on the surface of the bottom plate of the silo top measuring hole;

[0041] The sound and light alarm, the storage battery, the time relay and the proximity switch are electrically connected.

[0042] The beneficial effects of the present invention are as follows:

[0043] During the use of the present invention, when the material level in the bin or silo is higher than the set warning material level, after the steel ball contacts the material level, the tension of the wire rope becomes a slack tension state, reducing the weight of the cover plate, enabling the torsion spring to open the silo cover through its own elastic force, releasing the pressure in the bin, and avoiding the occurrence of a bursting accident. To prevent the material level from remaining high all the time, through the sound and light alarm, the emitted sound and light are used to remind the on-duty personnel to check in time to prevent the internal materials from overflowing the bin or silo; specifically:

[0044] 1. By setting a wire rope, a wire rope hole, a steel ball and a torsion spring, during the use of the bin or silo, in order to avoid the occurrence of a bursting accident, the steel ball arranged inside is connected to one end of the wire rope, and the other end of the wire rope is connected to the inside of the wire rope hole. When the material level in the bin or silo is low, the steel ball tightens the wire rope, causing the measuring material level hole cover plate to be in a closed state due to the gravity of the steel ball. When the material level in the bin or silo is higher than the set warning material level, after the steel ball contacts the material level, the tension of the wire rope becomes a slack tension state, reducing the weight of the cover plate, enabling the torsion spring to open the silo cover through its own elastic force, so that when the silo material level exceeds the ultra-high material level warning line, the observation hole device automatically pops open to release the pressure in the bin, avoiding the occurrence of a bursting accident;

[0045] 2. By setting a sound and light alarm, a time relay and a proximity switch, when the internal materials in the bin or silo are higher than the set warning level and the silo cover is opened through the linkage mechanism to release the pressure in the bin, in order to prevent the material level from remaining high all the time, the position of the iron sheet is sensed by the set proximity switch. When the measuring material level hole cover plate is opened, the iron sheet moves away from the proximity switch, starting the electrically connected time relay. The time relay starts timing. After the time reaches the set time, the electrically connected sound and light alarm is started, and the emitted sound and light are used to remind the on-duty personnel to check the material situation in time or increase the operation of the dust removal load, preventing the materials from continuously increasing after being at a high level, resulting in the problem of internal materials overflowing the bin or silo. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is the overall structural schematic diagram of the present invention;

[0047] Figure 2 is the expanded structural schematic diagram of the measuring material level hole cover plate of the present invention;

[0048] Figure 3 is the overall side-sectional structural schematic diagram of the present invention;

[0049] Figure 4 is the top-sectional structural schematic diagram of the sliding column of the present invention.

[0050] In the figure: 1. Bottom plate of the silo top measuring hole; 2. Base of the measuring level hole; 3. Acoustic-optic alarm; 4. Storage battery; 5. Time relay; 6. Rotating seat; 7. Connecting plate; 8. Rotating shaft; 9. Torsion spring; 10. Cover plate of the measuring level hole; 11. Handle; 12. Upper cover block; 13. Positioning slider; 14. Concave block; 15. Slider; 16. Positioning hole; 17. Chute; 18. Proximity switch; 19. Iron sheet; 20. Steel wire rope; 21. Rope fixing hole; 22. Steel ball; 23. Perforated plate; 24. Sliding column. Detailed implementation method

[0051] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and implementation methods.

[0052] As Figure 1 shown, a pneumatic conveying open silo vacuum release device includes: The bottom plate 1 of the silo top measuring hole is provided at the top of the silo or storage tank for measuring the height of the material in the silo. The bottom plate 1 of the silo top measuring hole and the base 2 of the measuring level hole are made of stainless steel metal material, which can reduce corrosion and rust in the open-air environment. And the surface of the base 2 of the measuring level hole is provided with a groove of 10*10*10mm, filled with rubber material, to increase the sealing performance between them. When the cover plate 10 of the measuring level hole is opened, the acoustic-optic alarm 3 uses sound and light to remind the post personnel to check the material situation in time or increase the operation of the dust removal load. The time relay 5 is used to set the time to extend the reminder to the post personnel to prevent the situation that no post personnel check for a long time. The rotating seat 6 is connected to the connecting plate 7 through the rotating shaft 8, so that the cover plate 10 of the measuring level hole can rotate, facilitating the opening and closing of the cover plate 10 of the measuring level hole.

[0053] As Figure 2 shown, it includes: The storage battery 4 is a device that can convert chemical energy into electrical energy and store it, and is set with a lithium battery, which has the characteristics of high energy density and long cycle life. This makes the lithium battery more durable in daily use and does not need to be replaced frequently. The handle 11 is a structure used to conveniently manually open or close the cover plate 10 of the measuring level hole. The upper cover block 12 is used for positioning when the slider 15 contacts the positioning hole 16, so that the cover plate 10 of the measuring level hole will not be opened. The proximity switch 18 is a device for detecting the approach or passing of an object, and an inductive proximity switch of a certain model is used, which uses a magnetic field or electromagnetic wave to detect the approach of an object. When an object enters the induction range, the generated magnetic field or reflected electromagnetic wave will cause a change in the sensor, thereby triggering the switch action. The iron sheet 19 at the connection can improve the induction position and distance, and better judge the opening and closing state of the cover plate 10 of the measuring level hole.

[0054] As Figure 3As shown in the figure, it includes: a torsion spring 9. When the steel ball 22 contacts the material level and the tension of the steel wire rope 20 becomes a slack tension state, the torsion spring 9 opens the measuring material level hole cover plate 10 through its own elasticity to release the pressure in the bin. The length of the steel wire rope 20 is equal to the height of the warning level. Due to the gravity of the steel ball 22, the steel wire rope 20 is in a taut state. After the steel ball 22 contacts the material level, the tension of the steel wire rope 20 becomes a slack tension state, reducing the weight of the measuring material level hole cover plate 10. The distance between the position of the wire rope hole 21 and the connecting plate 7 can form a lever principle, increasing the gravity of the steel ball 22 when vertically tensioning the steel wire rope 20. The steel wire rope 20 passing through the perforated plate 23 can reduce the friction when the steel wire rope 20 is opened or closed, increasing its service life.

[0055] As Figure 4 As shown in the figure, it includes: a positioning slider 13 for supporting the sliding positioning connection of the positioning hole 16 and the slider 15, and positioning and clamping the upper cover block 12 so that the measuring material level hole cover plate 10 cannot be opened. By pulling out the slider 15 from the positioning hole 16, the positioning of the measuring material level hole cover plate 10 by the slider 15 is released, enabling the measuring material level hole cover plate 10 to be opened, which is convenient for manual opening or closing. The concave block 14 is used for installing and supporting the slider 15. The slider 15 is installed through the chute 17 and the sliding column 24, enabling the slider 15 to slide and preventing it from falling out of the groove, preventing the loss of the slider 15 and making it more convenient to use for manually opening and closing the measuring material level hole cover plate 10. Compared with the connection of screws and nuts, it is more convenient.

[0056] Working principle: First, during the use of the silo or bin, to avoid explosion accidents, a steel ball 22 is internally provided and connected to one end of a wire rope 20. The other end of the wire rope 20 is connected to the inside of the rope hole 21. When the material level in the silo or bin is low, the steel ball 22 tightens the wire rope 20, causing the silo cover to keep the measuring material level hole cover plate 10 closed due to the gravity of the steel ball 22. When the material level in the silo or bin is higher than the set warning material level, after the steel ball 22 touches the material level, the tension of the wire rope 20 becomes a slack tension state, reducing the weight of the cover plate, enabling the torsion spring 9 to open the silo cover through its own elastic force. Thus, when the silo material level exceeds the ultra-high material level warning line, the observation hole device automatically pops open to release the pressure in the silo, avoiding explosion accidents. When the material inside the silo or bin is higher than the set warning level and the silo cover is opened through the linkage mechanism to release the pressure in the silo, to prevent the material level from remaining high all the time, the position of the induction iron sheet 19 is sensed by the proximity switch 18 provided. When the measuring material level hole cover plate 10 is opened, the iron sheet 19 moves away from the proximity switch 18, starting the time relay 5 which is electrically connected. The time relay 5 starts timing. After the time reaches the set time, the audible and visual alarm 3 which is electrically connected is started, and the sound and light emitted are used to remind the on-site personnel to check the material situation in time or increase the operation of the dust removal load, preventing the problem that the material overflows from the silo or bin after continuously increasing when it is at a high level.

Claims

1. A pneumatic conveying open silo vacuum release device, characterized in that Including the bottom plate (1) of the silo top measurement hole and: An audible and visual alarm (3), which is arranged above the bottom plate (1) of the silo top measurement hole; A time relay (5), which is arranged above the bottom plate (1) of the silo top measurement hole; A rotating seat (6), which is connected to the surface of the bottom plate (1) of the silo top measurement hole; A connecting plate (7), which is connected to the surface of the rotating seat (6) through a rotating shaft (8); A torsion spring (9), which is sleeved on the surface of the rotating shaft (8); A measuring level hole cover plate (10), which is connected to one side of the connecting plate (7); A measuring level hole base (2), which is installed on the surface of the bottom plate (1) of the silo top measurement hole; A proximity switch (18), which is arranged on the surface of the measuring level hole base (2); An iron sheet (19), which is arranged at the bottom of the measuring level hole cover plate (10); A safety rope hole (21), which is arranged at the bottom of the measuring level hole cover plate (10); A steel wire rope (20), which is connected to the bottom of the safety rope hole (21); A steel ball (22), which is connected to the other end of the steel wire rope (20).

2. The vacuum release device for a pneumatic conveying open silo according to claim 1, wherein The measuring level hole base (2) further includes: A positioning slider (13), which is arranged on the side of the measuring level hole base (2); A concave block (14), which is arranged on the side of the measuring level hole base (2).

3. The vacuum release device for a pneumatic conveying open silo according to claim 2, characterized in that, The measuring level hole cover plate (10) further includes: A handle (11), which is installed on the surface of the measuring level hole cover plate (10); An upper cover clamping block (12), which is connected to one side of the measuring level hole cover plate (10); The torsion spring (9) is located between the rotating seat (6) and the connecting plate (7).

4. The pneumatic conveying open silo vacuum release device according to claim 3, characterized in that, The concave block (14) further includes: A sliding column (24), which is arranged inside the concave block (14); The contact part of the proximity switch (18) and the iron sheet (19).

5. The vacuum release device for pneumatic conveying open silo according to claim 4, characterized in that, The sliding column (24) further includes: A slider (15), which is connected to the surface of the sliding column (24) through a sliding groove (17); A positioning hole (16), which is opened on the side of the positioning slider (13); The slider (15) and the positioning hole (16) are adapted to each other.

6. The vacuum release device for pneumatic conveying open silo according to claim 5, characterized in that, The bottom plate (1) of the silo top measurement hole further includes: A perforated plate (23), which is installed inside the bottom plate (1) of the silo top measurement hole; The steel wire rope (20) is located in the hole of the perforated plate (23).

7. The pneumatic conveying open silo vacuum release device according to claim 6, characterized in that The bottom plate (1) of the silo top measurement hole further includes: A storage battery (4), which is installed on the surface of the bottom plate (1) of the silo top measurement hole; The audible and visual alarm (3), the storage battery (4), the time relay (5), and the proximity switch (18) are electrically connected.

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