Coal jigging machine air pressure automatic compensation and stabilizing device

Abstract

The utility model discloses a kind of coal jigging machine air pressure automatic compensation pressure stabilizing device, the utility model relates to jigging machine equipment piece technical field.It includes mounting base, the mounting base is provided with the pressure stabilizing mechanism for the air pressure automatic compensation of coal jigging machine, pressure stabilizing mechanism includes: adjusting assembly, including the air bellow main body of the mounting base upper end setting, the upper end of the air bellow main body is connected with duct main body, the diaphragm plate is moved up and down under the action of wind pressure when the utility model changes in wind pressure: when wind pressure is too high, diaphragm plate compression spring moves downward, when wind pressure is too low, spring reset pushes diaphragm plate to move upward, balance internal air pressure by the displacement of diaphragm plate, real-time response wind pressure change, automatically compensate pressure fluctuation, ensure output wind pressure stability, avoid jigging machine due to wind pressure instability leading to coal washing effect decline, relief pipe and locking bolt cooperation, superpressure air body can be discharged quickly, prevent pressure stabilizing shell and connecting pipeline due to high pressure damage, improve equipment operation safety.

Description

Technical Field

[0001] This utility model relates to the technical field of jig equipment, specifically to an automatic pressure compensation and stabilization device for air pressure in a coal preparation jig. Background Technology

[0002] Coal, as an important basic energy source and industrial raw material in my country, occupies a key position in the energy structure. Coal jigging machines, as a highly efficient and commonly used coal sorting equipment, work by utilizing the loosening and stratification of the bed during the jigging cycle, and separating coal based on differences in material density. They are widely used in various coal washing and processing enterprises, and are of great significance for improving coal quality, meeting the requirements of different users for coal quality, and enhancing the comprehensive utilization efficiency of coal resources.

[0003] Reference patent (Publication No.: CN221808658U; Publication Date: 2024-10-08) discloses a coal preparation jig with an easily adjustable CNC air box, comprising: a jig housing, wherein two connecting plates are fixedly connected to the left and right walls of the jig housing, an electric push rod is fixedly connected to the upper side wall of each connecting plate, a mating sleeve is movably connected to the upper end of the electric push rod, a support flange is fixedly connected to the upper side wall of each mating sleeve, a screening box is fixedly connected to the lower side wall of the support flange, and a filter base plate is fixedly connected to the lower side wall of the screening box; both the left and right walls of the jig housing are fixedly connected to support side plates, a blower box is provided on the upper side wall of the left support side plate, and a negative pressure air box head is provided on the upper side wall of the right support side plate. The blower box continuously blows air into the screening box through an air inlet pipe, and the negative pressure air box continuously draws air from the screening box, thereby accelerating the drying efficiency of the screening box and shortening the coal processing time.

[0004] Based on the aforementioned patents, in the air volume adjustment stage, traditional devices often change the ventilation channel through a single-sided baffle or a single screw-driven adjustment structure. This adjustment method easily leads to the deviation of the airflow centerline inside the duct body, causing airflow turbulence. Furthermore, in actual production, due to the instability of the air supply system, changes in equipment operating conditions, and the influence of external environmental factors, the air pressure often fluctuates. When the air pressure is too high, it may cause excessive airflow impact force inside the jig, making the bed layer too loose, or even causing material splashing, affecting the sorting effect and potentially damaging equipment components. When the air pressure is too low, it cannot provide sufficient airflow power, resulting in insufficient bed layer looseness, unclear stratification, and reduced sorting accuracy. Therefore, this utility model provides an automatic air pressure compensation and stabilization device for a coal preparation jig. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an automatic pressure compensation and stabilization device for a coal preparation jig. This solves the problems of traditional devices that often use a single-sided baffle or single-screw driven adjustment structure to change the ventilation channel during airflow regulation. This adjustment method easily leads to the deviation of the airflow centerline inside the duct body, causing airflow turbulence. Furthermore, in actual production, due to the instability of the air supply system, changes in equipment operating conditions, and the influence of external environmental factors, air pressure often fluctuates. When the air pressure is too high, it may cause excessive airflow impact force inside the jig, resulting in excessively loose bed layers and even material splashing, affecting the sorting effect and potentially damaging equipment components. When the air pressure is too low, it cannot provide sufficient airflow power, leading to insufficient bed looseness, unclear stratification, and reduced sorting accuracy.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic pressure compensation and stabilizing device for a coal preparation jig, comprising a mounting base, wherein a pressure stabilizing mechanism for automatic pressure compensation of the coal preparation jig is provided on the mounting base, the pressure stabilizing mechanism comprising: The adjustment assembly includes a bellows body mounted on the upper end of a mounting base, a duct body connected to the upper end of the bellows body, a supporting shell fixed inside the duct body, and an opening / closing plate connected by an opening / closing assembly inside the supporting shell. A pressure stabilizing assembly includes a connecting pipe connected to the upper end of a conduit body, with exhaust housings connected to both ends of the connecting pipe, a pressure stabilizing housing fixed to the lower end of the exhaust housing, a movable plate connected via a lifting assembly inside the pressure stabilizing housing, a diaphragm plate connected via an elastic assembly at the upper end of the movable plate, and a pressure relief pipe on one side of the pressure stabilizing housing.

[0007] Preferably, the opening and closing assembly includes a sliding groove inside the supporting housing, a bidirectional lead screw is rotatably connected inside the sliding groove, the opening and closing plate is located on the inner wall of the sliding groove, the opening and closing plate is configured as two sets, and the opening and closing plate is threadedly connected to the bidirectional lead screw.

[0008] Preferably, the lifting assembly includes a bolt threaded to the lower end of the pressure stabilizing housing, and the movable plate is located at the upper end of the bolt, with the movable plate rotatably connected to the bolt.

[0009] Preferably, a telescopic sleeve is uniformly fixed to the bottom of the inner side of the voltage stabilizing shell, and the other end of the telescopic sleeve is fixedly connected to the movable plate.

[0010] Preferably, the elastic component includes springs uniformly fixed on the upper surface of the movable plate, a diaphragm plate fixedly connected to the upper end of the spring, four sets of guide rods fixed on the upper surface of the movable plate, and the diaphragm plate and the guide rods being slidably connected.

[0011] Preferably, a glass window is provided on one side of the pressure stabilizing housing, and a finger block is slidably connected inside the glass window. The finger block is fixedly connected to the diaphragm plate, and a locking bolt is provided inside the pressure relief pipe.

[0012] Beneficial effects This utility model provides an automatic pressure compensation and stabilization device for the air pressure of a coal preparation jig. Compared with the prior art, it has the following advantages: Firstly, this invention features a diaphragm plate that moves up and down under varying wind pressure: when the wind pressure is too high, the diaphragm plate compresses the spring and moves downward; when the wind pressure is too low, the spring resets and pushes the diaphragm plate upward. This displacement of the diaphragm plate balances the internal air pressure, responding in real-time to wind pressure changes and automatically compensating for pressure fluctuations, ensuring stable output wind pressure and preventing a decrease in coal preparation efficiency due to unstable wind pressure. The pressure relief pipe, in conjunction with the locking bolt, can quickly discharge overpressure air, preventing damage to the pressure-stabilizing shell and connecting pipes due to high pressure, thus improving equipment safety. Furthermore, by adjusting the height of the movable plate with bolts, the initial tension of the spring can be changed, adapting to the pressure stabilization requirements of different coal preparation conditions, offering high flexibility. Finally, the glass window, in conjunction with the finger block, allows for direct monitoring of the diaphragm plate's status, facilitating real-time monitoring of wind pressure by operators and timely intervention and adjustment.

[0013] Secondly, when it is necessary to adjust the opening and closing flow rate inside the main body of the conduit, the bidirectional screw is rotated. Since the bidirectional screw is threadedly connected to two sets of opening and closing plates, under the limiting action of the slide groove, the two sets of opening and closing plates will move towards or away from each other along the slide groove, thereby changing the size of the channel inside the main body of the conduit and realizing the adjustment of the opening and closing flow rate. Through synchronous symmetrical adjustment, it is ensured that the center line of the airflow remains unchanged during the adjustment process of the air valve, avoiding airflow turbulence and additional pressure loss that may be caused by unilateral adjustment, making the air volume adjustment more linear and stable, and meeting the requirements of the coal preparation jig for air pressure and air volume under different working conditions, thus improving the adaptability and flexibility of the equipment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the exhaust shell structure of this utility model; Figure 3 This is a schematic diagram of the voltage regulator housing structure of this utility model; Figure 4 This is a schematic diagram of the supporting shell structure of this utility model.

[0015] In the diagram: 1. Mounting base; 2. Air box body; 3. Duct body; 301. Support shell; 302. Slide groove; 303. Two-way lead screw; 304. Opening and closing plate; 4. Connecting pipe; 401. Exhaust shell; 5. Pressure stabilizing shell; 501. Bolt; 502. Telescopic sleeve rod; 503. Movable plate; 6. Spring; 601. Diaphragm plate; 602. Guide rod; 603. Finger block; 604. Glass window; 7. Pressure relief pipe; 701. Locking bolt. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-4 This utility model provides a technical solution: an automatic pressure compensation and stabilizing device for a coal preparation jig, including a mounting base 1, on which a pressure stabilizing mechanism for automatic pressure compensation of the coal preparation jig is provided, the pressure stabilizing mechanism including: The adjustment assembly includes a bellows body 2 mounted on the upper end of the mounting base 1, a duct body 3 connected to the upper end of the bellows body 2, a support shell 301 fixed inside the duct body 3, and an opening and closing plate 304 connected by an opening and closing assembly inside the support shell 301. The pressure stabilizing component includes a connecting pipe 4 connected to the upper end of the conduit body 3, with exhaust housings 401 connected to both ends of the connecting pipe 4, a pressure stabilizing housing 5 fixed to the lower end of the exhaust housing 401, a movable plate 503 connected by a lifting component inside the pressure stabilizing housing 5, a diaphragm plate 601 connected by an elastic component at the upper end of the movable plate 503, and a pressure relief pipe 7 on one side of the pressure stabilizing housing 5.

[0018] In a preferred embodiment, the opening and closing assembly includes a groove 302 inside the supporting housing 301. A bidirectional lead screw 303 is rotatably connected inside the groove 302. Opening and closing plates 304 are located on the inner wall of the groove 302. Two sets of opening and closing plates 304 are configured. The opening and closing plates 304 are threadedly connected to the bidirectional lead screw 303 and are used to adjust the opening and closing flow rate inside the duct body 3. The air output from the bellows body 2 enters the duct body 3. When it is necessary to adjust the opening and closing flow rate inside the duct body 3, the bidirectional lead screw 303 is rotated. Since the bidirectional lead screw 303 is threadedly connected to the two sets of opening and closing plates 304, under the limiting action of the groove 302, the two sets of opening and closing plates 304 will move towards or away from each other along the groove 302, thereby changing the channel size inside the duct body 3 and realizing the adjustment of the opening and closing flow rate.

[0019] In a preferred embodiment, the lifting assembly includes a bolt 501 threaded to the lower end of the pressure stabilizing housing 5, a movable plate 503 located above the bolt 501, and the movable plate 503 rotatably connected to the bolt 501. Telescopic sleeves 502 are uniformly fixed to the bottom of the interior of the pressure stabilizing housing 5, and the other end of the telescopic sleeves 502 is fixedly connected to the movable plate 503. The airflow adjusted by the adjusting assembly enters the exhaust housing 401 through the connecting pipe 4 and then flows into the pressure stabilizing housing 5. When it is necessary to adjust the initial pressure setting value inside the pressure stabilizing housing 5, the bolt 501 is rotated. Since the bolt 501 is threaded to the pressure stabilizing housing 5 and the movable plate 503 is rotatably connected to the bolt 501, under the limiting action of the telescopic sleeves 502, the rotation of the bolt 501 will drive the movable plate 503 to move up and down inside the pressure stabilizing housing 5, thereby changing the position of the diaphragm plate 601 on the movable plate 503 inside the pressure stabilizing housing 5, thus achieving the adjustment of the initial pressure setting value.

[0020] In a preferred embodiment, the elastic component includes springs 6 uniformly fixed to the upper surface of the movable plate 503, a diaphragm plate 601 fixedly connected to the upper end of the springs 6, four sets of guide rods 602 fixed to the upper surface of the movable plate 503, the diaphragm plate 601 slidably connected to the guide rods 602, a glass window 604 provided on one side of the pressure stabilizing housing 5, a finger block 603 slidably connected inside the glass window 604, the finger block 603 fixedly connected to the diaphragm plate 601, and a locking bolt 701 provided inside the pressure relief pipe 7. When wind pressure enters the pressure stabilizing housing 5, it acts on the diaphragm plate 601, causing the diaphragm to... The diaphragm plate 601 moves upward against the elastic force of the spring 6. The diaphragm plate 601 drives the finger block 603 to slide inside the glass window 604. By observing the position of the finger block 603, the movement of the diaphragm plate 601 can be intuitively understood, and thus the wind pressure can be understood. When the wind pressure exceeds the set value, the diaphragm plate 601 continues to move downward, opening the pressure relief pipe 7, so that the excess wind pressure can be discharged through the pressure relief pipe 7, thereby achieving the pressure stabilization function. When it is necessary to close the pressure relief pipe 7, the locking bolt 701 can be tightened. The guide rod 602 can ensure that the diaphragm plate 601 remains stable during the up and down movement and does not deviate.

[0021] Specifically, when the wind pressure is normal, the wind pressure from the connecting pipe 4 acts on the lower surface of the diaphragm plate 601, and the resulting upward force is equal to the downward preload of the spring 6. The diaphragm plate remains balanced and is in a certain equilibrium position. The air volume is output normally through the exhaust housing 401. When the wind pressure increases, the pressure acting below the diaphragm plate increases, and the gas thrust is greater than the spring preload. The diaphragm plate moves downward, making the channel space at the bottom of the pressure stabilizing housing 5 relatively larger. The displacement of the diaphragm plate 601 balances the internal air pressure, responds to wind pressure changes in real time, automatically compensates for pressure fluctuations, and ensures stable output wind pressure.

[0022] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0023] During operation, the air output from the bellows body 2 first enters the duct body 3. When it is necessary to adjust the opening and closing flow rate inside the duct body 3, the bidirectional screw 303 in the sliding groove 302 inside the support housing 301 is rotated. Since the bidirectional screw 303 is threadedly connected to two sets of opening and closing plates 304, and the opening and closing plates 304 are limited by the sliding groove 302, the two sets of opening and closing plates 304 will move towards or away from each other along the sliding groove 302 to change the size of the internal channel of the duct body 3, thereby achieving flow rate adjustment. The airflow, after being adjusted by the regulating component, enters the exhaust housing 401 through the connecting pipe 4, and then flows into the pressure stabilizing housing 5. If it is necessary to adjust the initial pressure setting inside the pressure stabilizing housing 5, the threaded bolt 501 at its lower end can be rotated. Because the bolt 501 is rotatably connected to the movable plate 503 and the movable plate 503 is limited by the telescopic sleeve 502 inside the pressure stabilizing housing 5, the rotation of the bolt 501 will cause the movable plate 503 to move up and down, thereby changing the position of the movable plate 503 inside the pressure stabilizing housing 5. When the air pressure enters the pressure stabilizing housing 5, it acts on the diaphragm plate 601, causing the diaphragm plate 601 to overcome the spring 6 at the upper end of the movable plate 503. During the elastic movement, the four sets of guide rods 602 on the movable plate 503 ensure that the diaphragm plate 601 moves stably without deviation. At the same time, the diaphragm plate 601 drives the finger block 603 to slide inside the glass window 604 on one side of the pressure stabilizing housing 5. By observing the position of the finger block 603, the wind pressure can be intuitively understood. When the wind pressure exceeds the set value, the diaphragm plate 601 moves downward to compress and increase the space inside the pressure stabilizing housing 5, and the pressure relief pipe 7 on one side of the pressure stabilizing housing 5 can be opened to allow excess wind pressure to be discharged through the pressure relief pipe 7 to achieve pressure stabilization. When it is necessary to close the pressure relief pipe 7, tightening the locking bolt 701 inside it can complete the operation.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic pressure compensation and stabilizing device for a coal preparation jig, comprising a mounting base (1), characterized in that: The mounting base (1) is equipped with a pressure stabilizing mechanism for automatic compensation of the air pressure of the coal preparation jig. The pressure stabilizing mechanism includes: The adjustment assembly includes a bellows body (2) provided on the upper end of the mounting base (1), a duct body (3) connected to the upper end of the bellows body (2), a support shell (301) fixed inside the duct body (3), and an opening and closing plate (304) connected by an opening and closing assembly inside the support shell (301). The pressure stabilizing assembly includes a connecting pipe (4) connected to the upper end of the conduit body (3), with exhaust housing (401) connected to both ends of the connecting pipe (4), and a pressure stabilizing housing (5) fixed to the lower end of the exhaust housing (401). The pressure stabilizing housing (5) has a movable plate (503) connected by a lifting assembly inside, and a diaphragm plate (601) connected by an elastic assembly at the upper end of the movable plate (503). A pressure relief pipe (7) is provided on one side of the pressure stabilizing housing (5).

2. The automatic pressure compensation and stabilizing device for a coal preparation jig according to claim 1, characterized in that: The opening and closing assembly includes a slide groove (302) inside the supporting housing (301), a bidirectional lead screw (303) is rotatably connected inside the slide groove (302), and the opening and closing plate (304) is located on the inner wall of the slide groove (302). The opening and closing plate (304) is configured in two sets, and the opening and closing plate (304) is threadedly connected to the bidirectional lead screw (303).

3. The automatic pressure compensation and stabilizing device for a coal preparation jig according to claim 1, characterized in that: The lifting assembly includes a bolt (501) threaded to the lower end of the pressure stabilizing housing (5), and the movable plate (503) is located above the bolt (501). The movable plate (503) and the bolt (501) are rotatably connected.

4. The automatic pressure compensation and stabilizing device for a coal preparation jig according to claim 1, characterized in that: The bottom of the stabilizing housing (5) is uniformly fixed with a telescopic sleeve (502), and the other end of the telescopic sleeve (502) is fixedly connected to the movable plate (503).

5. The automatic pressure compensation and stabilizing device for a coal preparation jig according to claim 1, characterized in that: The elastic component includes a spring (6) uniformly fixed on the upper surface of the movable plate (503), a diaphragm plate (601) fixedly connected to the upper end of the spring (6), and four sets of guide rods (602) fixed on the upper surface of the movable plate (503). The diaphragm plate (601) and the guide rods (602) are slidably connected.

6. The automatic pressure compensation and stabilizing device for a coal preparation jig according to claim 1, characterized in that: A glass window (604) is provided on one side of the pressure stabilizing housing (5). A finger block (603) is slidably connected inside the glass window (604). The finger block (603) is fixedly connected to the diaphragm plate (601). A locking bolt (701) is provided inside the pressure relief pipe (7).

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