Leakage-proof self-locking pneumatic gate and bulk material conveying equipment applying same

Abstract

The utility model provides a leakage-proof self-locking pneumatic gate which comprises a gate frame, an air cylinder, a first spring, a locking mechanism, a second spring and a reset mechanism. The front side portion of the locking mechanism is connected with one end of the first spring, the other end of the first spring is connected with the first connecting structure of the gate frame, the middle of the locking mechanism is in pivot joint with the second connecting structure of the gate frame, and the rear side portion of the locking mechanism serves as an operating handle enabling the front side portion of the locking mechanism to block the gate plate in the gate opening closing state. When the gate plate in the gate opening closing state is blocked by the locking mechanism, the locking mechanism enables the gate to be in a self-locking state. And when the front side part of the locking mechanism leaves the blocking position, the locking mechanism realizes a holding state after the gate is unlocked. The utility model further provides bulk material conveying equipment applying any one of the leakproof self-locking pneumatic gate valves. The self-locking and unlocking device can conveniently and safely realize self-locking and unlocking of the pneumatic gate.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic gates, in particular to a leak-proof self-locking pneumatic gate and bulk material conveying equipment using the same. Background Art

[0002] At present, most of the material distribution gates used in bulk grain conveying systems are pneumatic gates. In actual use, pneumatic gates have the following disadvantages: 1. The gate cannot be closed properly due to improper operation or design defects of the gate; 2. The gate plate shifts due to equipment vibration, resulting in a gap in the gate; 3. The gate is opened due to misoperation.

[0003] When there is a gap in the gate when it is closed or the gate is opened by mistake, the following abnormal events may occur if not discovered in time: 1) Different grains will be mixed in freight quality events; 2) The silo will issue or receive the wrong goods; 3) The process equipment will be blocked or overloaded, resulting in equipment damage events.

[0004] Therefore, it is very necessary and of technical significance to design a pneumatic gate which can be used in bulk material conveying systems (particularly bulk grain conveying systems) and has a leak-proof function and a self-locking type. Utility Model Content

[0005] In view of this, it is necessary to propose a leak-proof self-locking pneumatic gate and bulk material conveying equipment using the same to address the above problems, so as to overcome several shortcomings of the above-mentioned background technology and solve the technical problem of how to conveniently and safely achieve self-locking and unlocking of the pneumatic gate.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model proposes a leakproof self-locking pneumatic gate for opening and closing a gate. The leakproof self-locking pneumatic gate comprises a gate frame, a gate plate movable guide mechanism is arranged inside the gate frame, a cylinder is installed on the gate frame, a gate plate is connected to the output end of the cylinder, the telescopic direction of the output end of the cylinder is horizontal, and the gate plate is opened and closed by the telescopic drive of the output end of the cylinder. The leakproof self-locking pneumatic gate also comprises a first spring, a locking mechanism, a second spring and a reset mechanism; the front side of the locking mechanism is connected to one end of the first spring, the other end of the first spring is connected to the first connecting structure of the gate frame, the middle part of the locking mechanism is pivotally connected to the second connecting structure of the gate frame, and the rear side of the locking mechanism serves as an operating handle for making the front side of the locking mechanism block the gate plate in a gate closing state; the reset mechanism is connected to the third connecting structure of the gate frame, one side of the reset mechanism is connected to one end of the second spring, and the other end of the second spring is connected to the fourth connecting structure of the gate frame;

[0008] When the gate plate in the gate closing state is blocked by the locking mechanism, the gate is in the closed locked state, one lateral side of the gate plate is blocked by the front side of the locking mechanism, the front side of the locking mechanism is in a blocking position, the rear side of the locking mechanism is pressed against a position of the reset mechanism and the reset mechanism is stressed by the second spring, so that the locking mechanism enables the gate to achieve a self-locking state;

[0009] When the front side of the locking mechanism leaves the blocking position, the gate is in an unlocked state, the front side of the locking mechanism is in a disengaged position, the rear side of the locking mechanism is pressed against another position of the reset mechanism and the reset mechanism is subjected to force from the second spring, so that the locking mechanism realizes the holding state after the gate is unlocked.

[0010] Further, the locking mechanism includes a first crank arm connecting rod and a blocking block; the first crank arm connecting rod includes a first forearm, a first rod middle portion and a first rear arm connected in sequence; the first forearm and the first rear arm form an angle; the first forearm is longitudinally fixedly connected to the blocking block, the front side of the locking mechanism includes the first forearm and the blocking block; the first rear arm serves as the rear side of the locking mechanism; the first rod middle portion is pivotally connected to the second connecting structure of the gate frame;

[0011] When the blocking block follows the first forearm to swing toward the plane where the gate moves laterally and moves from the disengaged position to the blocking position, one lateral side of the gate is blocked by the blocking block, so that the locking mechanism enables the gate to achieve a self-locking state.

[0012] Furthermore, a limit slot is provided on the gate frame; a locking shaft is protruded toward the limit slot at the end of the first rear arm; the locking shaft is embedded in the limit slot, and when the first rear arm swings, the locking shaft moves in an arc trajectory in the limit slot; when the gate is self-locking, the locking shaft is located in the lower section of the limit slot; when the locking mechanism realizes the holding state after the gate is unlocked, the locking shaft is located in the upper section of the limit slot.

[0013] Furthermore, the reset mechanism is pivotally connected to the gate frame; and the second spring is a tension spring.

[0014] Further, the reset mechanism is a second crank arm connecting rod; the second crank arm connecting rod comprises a second forearm, a second rod middle portion and a second rear arm connected in sequence; the second forearm and the second rear arm form an angle; one end of the second forearm is connected to one end of the second spring, and the other end of the second spring is connected to the fourth connecting structure of the gate frame; the middle portion of the second forearm is pivotally connected to the third connecting structure of the gate frame;

[0015] When the gate is in a self-locking state, the locking shaft is pressed against a position in the middle of the second rod of the reset mechanism, so that the locking shaft and the second forearm are kept in unlockable mutual pressing;

[0016] When the locking mechanism is in a holding state after the gate is unlocked, the locking shaft is pressed against another position of the middle part of the second rod of the reset mechanism, so that the locking shaft and the middle part of the second rod are kept in unlockable mutual pressing;

[0017] The first rear arm is lifted by overcoming the action force of the second spring so that the gate is transformed from a self-locking state to a holding state after the gate is unlocked;

[0018] When the gate pushes the second rear arm to swing in a direction away from the plane where the gate moves laterally, the second front arm tilts upward, so that the gate is transformed from a holding state after the gate is unlocked to a self-locking state.

[0019] Furthermore, the gate frame is also provided with an upper limit structure and a lower limit structure; the locking mechanism rotates around the pivot virtual axis within an angle range, the upper limit structure is used to limit the locking mechanism to rotate to one limit position, and the lower limit structure is used to limit the locking mechanism to rotate to another limit position;

[0020] The upper limit structure is used to limit the first rear arm to swing to the upper limit position, and the lower limit structure is used to limit the first rear arm to swing to the lower limit position;

[0021] The upper slot end of the limiting through slot is an upper limit structure, and the lower slot end of the limiting through slot is a lower limit structure.

[0022] Furthermore, the angle between the first front arm and the first rear arm is a first virtual obtuse angle, and the opening of the first virtual obtuse angle faces away from the gate plate; the angle between the second front arm and the second rear arm is a second virtual obtuse angle, and the opening of the second virtual obtuse angle faces away from the gate plate; an arched protrusion is convexly provided in the middle of the second rod in the direction toward the gate plate, and a clamping recessed position in the middle of the second rod is formed between the arched protrusion and the second rear arm; when the locking mechanism realizes the holding state after the gate is unlocked, the locking shaft is pressed against the clamping recessed position by the action force of the second spring;

[0023] The end of the first rear arm is convexly provided with a handle serving as an extension shaft of the locking shaft, facing away from the limiting through slot;

[0024] When the gate is in a self-locking state, the locking shaft is pressed against the connecting rod arm between the arched protrusion of the reset mechanism and the end of the second forearm, so that the locking shaft and the second forearm are kept in unlockable mutual pressing;

[0025] When the locking mechanism is in a holding state after the gate is unlocked, the locking shaft is pressed against the clamping recess, so that the locking shaft and the middle part of the second rod are kept in unlockable mutual pressing;

[0026] The handle is lifted by overcoming the force of the second spring so that the gate changes from the self-locking state to the holding state after the gate is unlocked;

[0027] When the gate is opened and pushes the second rear arm to swing, the locking shaft is released from the state of being pressed by the clamping recess. Then, when the gate is closed, the gate leaves the top of the clamping block, so that the clamping block moves from the disengaged position to the blocking position, thereby realizing the self-locking state of the gate.

[0028] Furthermore, a roller is provided at the end of the second rear arm; the roller is used to reduce the friction force when the gate moves laterally and hits the roller;

[0029] The limiting groove is arc-shaped;

[0030] The locking shaft is arranged longitudinally.

[0031] Furthermore, the first spring is a tension spring; when the gate is in a self-locking state, the first spring is in a contracted state; when the locking mechanism is in a holding state after the gate is unlocked, the first spring is in an extended state;

[0032] The second connection structure and the third connection structure are both located below the plane where the gate plate moves laterally, and the second connection structure is located laterally between the gate and the third connection structure.

[0033] The utility model also proposes a bulk material conveying equipment using the leak-proof self-locking pneumatic gate as described in any of the above items, the bulk material conveying equipment includes a bulk material conveying equipment provided with a material distribution port and the leak-proof self-locking pneumatic gate installed at the material distribution port, the gate plate closes the material distribution port when the gate is closed, and the gate is connected to the material distribution port when it is not closed.

[0034] The beneficial effects of the utility model are:

[0035] The utility model has the advantages of simple and convenient operation, safe and reliable structure, low maintenance cost, leak-proof and self-locking, which provides convenience for on-site operation and eliminates the mixing of bulk grain (or other bulk materials) caused by gate leakage or misopening, thereby improving freight quality and reducing the safety risk of personnel entering the silo to pick mixed materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front view cross-sectional view of a leak-proof self-locking pneumatic gate of the utility model;

[0037] Figure 2 It is a top view of a leak-proof self-locking pneumatic gate of the utility model;

[0038] Figure 3 This is a left view of a leak-proof self-locking pneumatic gate of the utility model;

[0039] Figure 4 for Figure 2 A cross-sectional view taken along the JJ direction;

[0040] Figure 5 It is a partial cross-sectional view of a leak-proof self-locking pneumatic gate involved in the utility model, in which the locking mechanism realizes a self-locking state after the gate is closed;

[0041] Figure 6 It is a partial cross-sectional view of a leak-proof self-locking pneumatic gate involved in the utility model, in which the locking mechanism realizes the retention state of the gate after the gate is unlocked;

[0042] Figure 7 It is a partial cross-sectional view of a leak-proof self-locking pneumatic gate involved in the utility model when the gate plate pushes the reset mechanism;

[0043] Figure 8 It is a partial cross-sectional view of a leak-proof self-locking pneumatic gate involved in the utility model after the locking mechanism restores the self-locking state after the gate is closed;

[0044] Fig. 9 for Figure 5 A partial cross-sectional view from above;

[0045] Fig.10 for Figure 2 A cross-sectional view in the HH direction;

[0046] Description of reference numerals:

[0047] Gate frame 1; gate plate movable guide mechanism 2; cylinder 3; gate plate 4; first spring 5; locking mechanism 6; second spring 7; reset mechanism 8; upper limit structure 111; lower limit structure 112; limit slot 11; first crank arm connecting rod 61; first front arm 611; first rod middle part 612; first rear arm 613; blocking block 62; second front arm 81; second rod middle part 82; blocking recess 820; second rear arm 83; roller 831; locking shaft 6131; first connecting structure 101; second connecting structure 102; third connecting structure 103; fourth connecting structure 104; edge member 1001; intermediate connecting member 41. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be further clearly and completely described below in combination with the embodiments of the utility model. It should be noted that the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0049] It should be understood that the directions or positional relationships indicated by terms such as "upper", "lower", "front", "back", "left", and "right" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0050] The terms "first", "second", "third", "fourth", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the definition of "first", "second", "third", "fourth" features may explicitly or implicitly include one or more of the features.

[0051] Example 1

[0052] Figure 1-Figure 9 As shown:

[0053] The present embodiment proposes a leakproof self-locking pneumatic gate for opening and closing a gate. The leakproof self-locking pneumatic gate comprises a gate frame 1, a gate plate movable guide mechanism 2 is arranged inside the gate frame 1, a cylinder 3 is installed on the gate frame 1, a gate plate 4 is connected to the output end of the cylinder 3, the telescopic direction of the output end of the cylinder 3 is horizontal, and the gate plate 4 is opened and closed by the telescopic drive of the output end of the cylinder 3. The leakproof self-locking pneumatic gate also includes a first spring 5, a locking mechanism 6, a second spring 7 and a reset mechanism 8; the front side of the locking mechanism 6 is connected to the first spring 5, the locking mechanism 6 is connected to the second spring 7, and the second spring 7 is connected to the first spring 5. One end of the first spring 5 is connected, the other end of the first spring 5 is connected to the first connection structure 101 of the gate frame 1, the middle part of the locking mechanism 6 is pivotally connected to the second connection structure 102 of the gate frame 1, and the rear side of the locking mechanism 6 serves as an operating handle to make the front side of the locking mechanism 6 block the gate plate 4 in the closed gate state; the reset mechanism 8 is connected to the third connection structure 103 of the gate frame 1, one side of the reset mechanism 8 is connected to one end of the second spring 7, and the other end of the second spring 7 is connected to the fourth connection structure 104 of the gate frame 1;

[0054] When the gate plate 4 in the gate closing state is blocked by the locking mechanism 6, the gate is in the closed locked state, one lateral side of the gate plate 4 is blocked by the front side of the locking mechanism 6, the front side of the locking mechanism 6 is in a blocking position, and the rear side of the locking mechanism 6 is in a position of the reset mechanism 8 (the position is detailed in FIG. Figure 5 ) is pressed tightly and the reset mechanism 8 is subjected to the force of the second spring 7, so that the locking mechanism 6 makes the gate realize the self-locking state (this state is detailed in Figure 5 );

[0055] When the front side of the locking mechanism 6 leaves the blocking position, the gate is in an unlocked state, the front side of the locking mechanism 6 is in a disengaged position, and the rear side of the locking mechanism 6 is reset to another position of the mechanism 8 (see the details of this position). Figure 6 ) is pressed tightly and the reset mechanism 8 is subjected to the force of the second spring 7, so that the locking mechanism 6 realizes the holding state after the gate is unlocked (this state is detailed in Figure 6 );

[0056] The reset mechanism 8 is used to press against the locking mechanism 6 so that the gate maintains a self-locking state or a holding state after the gate is unlocked. When the gate is hit by the gate plate 4, the gate changes from the holding state after the gate is unlocked to the self-locking state of the gate.

[0057] Specifically, the main body of the cylinder 3 is located outside the gate.

[0058] Optimally, the locking mechanism 6 includes a first crank arm connecting rod 61 and a blocking block 62; the first crank arm connecting rod 61 includes a first front arm 611, a first rod middle portion 612 and a first rear arm 613 connected in sequence; the first front arm 611 and the first rear arm 613 form an angle; the first front arm 611 is longitudinally fixedly connected to the blocking block 62, and the front side of the locking mechanism 6 includes the first front arm 611 and the blocking block 62; the first rear arm 613 serves as the rear side of the locking mechanism 6; the first rod middle portion 612 is pivotally connected to the second connecting structure 102 of the gate frame 1;

[0059] When the blocking block 62 follows the first front arm 611 to swing toward the plane where the gate plate 4 moves laterally and moves from the disengaged position to the blocking position, one side of the gate plate 4 is blocked by the blocking block 62, so that the locking mechanism 6 enables the gate to achieve a self-locking state (this state is detailed in Figure 5 ).

[0060] Optimally, the gate frame 1 is provided with a limit slot 11; the end of the first rear arm 613 is provided with a locking shaft 6131 protruding toward the limit slot 11; the locking shaft 6131 is embedded in the limit slot 11, and when the first rear arm 613 swings, the locking shaft 6131 moves in an arc track in the limit slot 11; when the gate is self-locking, the locking shaft 6131 is located at the lower section of the limit slot 11; when the locking mechanism 6 realizes the holding state after the gate is unlocked (this state is detailed in Figure 6 ), the locking shaft 6131 is located at the upper section of the limiting through slot 11.

[0061] Specifically, the gate plate 4, the positioning block 62, and the reset mechanism 8 are all located on the inner side of a frame beam of the gate frame 1, and the first crank arm connecting rod 61 is located on the outer side of a horizontal frame beam of the gate frame 1. The positioning block 62 is fixedly connected to the first crank arm connecting rod 61 through a pivot axis passing through an axial hole of the frame beam; the reset mechanism 8 can be movably tightened by the locking shaft 6131 passing through the limiting groove 11.

[0062] Optimally, the reset mechanism 8 is pivotally connected to the gate frame 1; and the second spring 7 is a tension spring.

[0063] Optimally, the reset mechanism 8 is a second crank arm connecting rod; the second crank arm connecting rod comprises a second front arm 81, a second rod middle portion 82 and a second rear arm 83 connected in sequence; the second front arm 81 and the second rear arm 83 form an angle; one end of the second front arm 81 is connected to one end of the second spring 7, and the other end of the second spring 7 is connected to the fourth connecting structure 104 of the gate frame 1; the middle portion of the second front arm 81 is pivotally connected to the third connecting structure 103 of the gate frame 1;

[0064] When the gate is in the self-locking state (see Figure 5 ), the locking shaft 6131 is reset to a position of the second rod middle portion 82 of the mechanism 8 (the position is detailed in Figure 5 ) so that the locking shaft 6131 and the second forearm 81 are kept unlockably pressed against each other;

[0065] When the locking mechanism 6 is in the holding state after the gate is unlocked (see the state for details) Figure 6 ), the locking shaft 6131 is reset to another position of the second rod middle portion 82 of the mechanism 8 (the position is detailed in Figure 6 ) so that the locking shaft 6131 and the second rod middle portion 82 are kept unlockably pressed against each other;

[0066] The first rear arm 613 is lifted by overcoming the force of the second spring 7 so that the gate is transformed from the self-locking state to the holding state after the gate is unlocked; specifically, the dynamic process of the gate transforming from the self-locking state to the holding state after the gate is unlocked is: first, Figure 5 state, and then becomes Figure 6 status.

[0067] The gate plate 4 pushes the second rear arm 83 to swing away from the plane where the gate plate 4 moves laterally (specifically, as shown in FIG. Figure 6 , Figure 7 As shown in FIG. 1 , when the second rear arm 83 rotates clockwise around the third connecting structure 103, the second front arm 81 tilts upward, so that the gate changes from the holding state after the gate is unlocked to the self-locking state; the dynamic process of the gate changing from the holding state after the gate is unlocked to the self-locking state is: first, Figure 6 state, and then becomes Figure 7 state, and finally becomes Figure 8 status.

[0068] Optimally, the gate frame 1 is further provided with an upper limit structure 111 and a lower limit structure 112; the locking mechanism 6 rotates around the pivot virtual axis within an angle range, the upper limit structure 111 is used to limit the locking mechanism 6 to rotate to one limit position, and the lower limit structure 112 is used to limit the locking mechanism 6 to rotate to another limit position;

[0069] The upper limit structure 111 is used to limit the first rear arm 613 from swinging to the upper limit position, and the lower limit structure 112 is used to limit the first rear arm 613 from swinging to the lower limit position;

[0070] The upper slot end position of the limiting through slot 11 is an upper limit position structure, and the lower slot end position of the limiting through slot 11 is a lower limit position structure.

[0071] Optimally, the angle between the first front arm 611 and the first rear arm 613 is a first virtual obtuse angle, and the opening of the first virtual obtuse angle faces away from the gate plate 4; the angle between the second front arm 81 and the second rear arm 83 is a second virtual obtuse angle, and the opening of the second virtual obtuse angle faces away from the gate plate 4; the middle part 82 of the second rod is convexly provided with an arched protrusion in the direction toward the gate plate 4, and a clamping recessed position 820 of the middle part of the second rod is formed between the arched protrusion and the second rear arm 83; when the locking mechanism 6 realizes the holding state after the gate is unlocked, the locking shaft 6131 is pressed against the clamping recessed position 820 by the action force of the second spring 7;

[0072] The end of the first rear arm 613 is protruded with a handle serving as an extension of the locking shaft 6131, facing away from the limiting through slot 11;

[0073] When the gate is in the self-locking state (see Figure 5 ), the locking shaft 6131 is pressed against the connecting rod arm between the arched protrusion of the reset mechanism 8 and the end of the second forearm 81, so that the locking shaft 6131 and the second forearm 81 are kept in unlockable mutual pressing;

[0074] When the locking mechanism 6 is in the holding state after the gate is unlocked (see the state for details) Figure 6 ), the locking shaft 6131 is engaged with the recessed position 820 (the serial number is Figure 7 ) so that the locking shaft 6131 and the second rod middle portion 82 are kept unlockably pressed against each other;

[0075] By overcoming the force of the second spring 7 and lifting the handle, the gate is transformed from the self-locking state to the holding state after the gate is unlocked;

[0076] When the gate plate 4 is opened and pushes the second rear arm 83 to swing, the locking shaft 6131 is released from the state of being pressed by the engaging recess 820. Then, when the gate plate 4 is closed, the gate plate 4 leaves the top of the engaging block 62, so that the engaging block 62 moves from the disengaged position to the blocking position, thereby realizing the self-locking state of the gate.

[0077] Specifically, the snap-fit ​​recessed position 820 is a specific structure of another position of the second rod middle portion 82 as described above.

[0078] Optimally, a roller 831 is provided at the end of the second rear arm 83 ; the roller 831 is used to reduce the friction force when the gate plate 4 moves laterally and hits the roller 831 .

[0079] Optimally, the limiting through slot 11 is arc-shaped;

[0080] The locking shaft 6131 is arranged longitudinally.

[0081] Optimally, the first spring 5 is a tension spring; when the gate is in a self-locking state, the first spring 5 is in a contracted state; when the locking mechanism 6 is in a holding state after the gate is unlocked, the first spring 5 is in an extended state;

[0082] The second connection structure 102 and the third connection structure 103 are both located below the plane where the gate plate 4 moves laterally, and the second connection structure 102 is located laterally between the gate and the third connection structure 103 .

[0083] The present embodiment further proposes a bulk material conveying equipment using a leak-proof self-locking pneumatic gate as described in any of the above items, including bulk material conveying equipment provided with a material distribution port and the leak-proof self-locking pneumatic gate installed at the material distribution port, wherein the gate plate 4 closes the material distribution port when the gate is closed, and the gate is connected to the material distribution port when it is not closed.

[0084] Specifically, the first connection structure 101 is a mounting column for hooking a spring; the second connection structure 102 is a pivot shaft; the third connection structure 103 is a pivot shaft; and the fourth connection structure 104 is a mounting column for hooking a spring.

[0085] Specifically, the leak-proof self-locking pneumatic gate also includes an inspection cover, an upper roller, an upper roller shaft, a lower roller, a lower roller shaft, a dust-proof explosion-proof travel switch, a dust-proof explosion-proof solenoid valve, a leak-proof material blocking strip, etc.; the gate frame 1 is composed of five frames, namely, upper, lower, left, right and middle, which are connected by welding; the inspection cover is located at the left side frame and is connected by bolts. The main function is to facilitate the disassembly and assembly of the cylinder head nut during daily maintenance; the upper and lower roller shafts are fixed to the inner sides of the upper and lower frames by bolts respectively; the cylinder 3 is connected to the middle frame by bolts. The gate 4 is connected and fixed to the right side frame, the cylinder piston rod and the gate piston connector are connected by bolts, and the cylinder piston rod extends and contracts to achieve the effect of closing and opening the gate 4; the dust explosion-proof travel switch is divided into two travel switches, the open position and the closed position, and is fixed to the upper side frame of the gate by bolt connection; the dust explosion-proof solenoid valve is fixed to the upper side frame of the gate by bolt connection; the leak-proof material blocking strip fits tightly with the gate 4 during the opening and closing process of the gate, and has a good anti-leakage effect, and is bolted to the inner sides of the upper and lower frames respectively.

[0086] Specifically, the locking mechanism 6 is fixed to the lower side frame of the gate by means of bolt connection, and is specifically composed of the following parts: a first crank arm connecting rod 61 (also known as a stop connecting rod rocker arm), a first spring 5 (also known as a stop connecting rod reset spring), a reset mechanism 8 (also known as a connecting rod locking device), a positioning block 62 (also known as a stop block), a first rear arm 613 (also known as a stop connecting rod reset handle), etc.; the gate also includes a second spring 7 (also known as a connecting rod locking reset spring); the stop connecting rod rocker arm is pin-connected to the stop connecting rod mounting seat by means of screws; the two ends of the stop connecting rod reset spring are respectively connected by bolts: one end is fixed to the left side of the stop connecting rod rocker arm and the connection between the left end of the stop connecting rod rocker arm, and the other end It is connected to the stop link reset spring of the gate frame 1 by a locating pin; the link locking device adopts a link locking device locating pin on the inner side of the frame, and its upper end is bolted to the roller 831 (also called the link locking device roller), and its lower end is bolted to the link locking reset spring; the link locking reset spring is installed on the inner side of the frame of the gate frame 1, one end of which is bolted to the lower end of the link locking device, and the other end is fixed to the gate frame of the gate frame 1; the stop block is pin-connected to the stop link mounting seat by welding; the middle part of the stop link reset handle is bolted to the right end of the stop link rocker arm, and both sides are the same length, one side is used as a handle, and the other side is used as a locking rod for locking the stop link rocker arm.

[0087] Further optimized, the gate frame 1 includes a first frame, a second frame, a third frame and a fourth frame connected in sequence, and the first frame and the fourth frame are connected and enclosed; in a top view, the first frame is located on the left side of the gate frame 1, the second frame is located on the rear side of the gate frame 1, the third frame is located on the right side of the gate frame 1, and the fourth frame is located on the front side of the gate frame 1; at least one frame is provided with a surrounding edge 1001, which protrudes toward the gate plate 4 in a closed state, and the bottom surface of the surrounding edge 1001 abuts against the edge of the top surface of the gate plate 4 in a closed state, and the surrounding edge 1001 is used to prevent bulk materials from falling from the gap between the gate frame 1 and the gate plate 4 in a closed state; specifically, the surrounding edge 1001 is a U-shaped bent channel steel bar (see Fig.10 ).

[0088] Further optimization, such as Fig.10 As shown, the push rod of the cylinder 3 pushes and pulls the gate plate 4 through an intermediate connecting member 41; the cross section of the intermediate connecting member 41 is a T-shaped structure or an L-shaped structure inverted 180 degrees; specifically, the push and pull direction of the push rod of the cylinder 3 is parallel to the movement direction of the gate plate 4. Further optimized, as Figure 8 , Fig. 9 As shown, the first connecting structure 101 , the first crank arm link 61 , and the first spring 5 are located on the outside of the gate frame 1 ; the positioning block 62 , the reset mechanism 8 , the second spring 7 , and the fourth connecting structure 104 are located on the inside of the gate frame 1 .

[0089] The specific use process of this utility model is as follows:

[0090] When the gate needs to be opened, the first rear arm 613 is lifted upward, the blocking block 62 moves downward, and the reset mechanism 8 locks the first rear arm 613 in a fixed position, so that the gate plate 4 is in an unlocked state, and the gate plate 4 can be opened freely; when the gate plate 4 touches the roller 831 during the opening process, the reset mechanism 8 rotates to the lower right (at Figure 7 , the reset mechanism 8 rotates clockwise around the pivot axis), and the locked state of the first rear arm 613 is released; when the gate 4 is closed, the first spring 5 stretches the first front arm 611 upward, and the blocking block 62 moves upward accordingly, and the gate 4 is in the self-locking state again (i.e., the mistaken opening protection state).

[0091] Example 2

[0092] Embodiment 2 is a more complex alternative to Embodiment 1;

[0093] Alternatively, the first spring is a compression spring; the second spring is a compression spring; in order to adapt to the characteristics of the compression spring, a corresponding specific locking mechanism and a specific reset mechanism are matched accordingly.

[0094] Alternatively, the upper limit structure and the lower limit structure may also be correspondingly transformed into protrusions on the gate frame.

[0095] Example 3

[0096] Embodiment 3 is a further product application of any one of Embodiments 1-2;

[0097] The present embodiment proposes a bulk material conveying equipment using a leak-proof self-locking pneumatic gate as described in any of the above items, including bulk material conveying equipment provided with a material distribution port and the leak-proof self-locking pneumatic gate installed at the material distribution port, wherein the gate plate closes the material distribution port when the gate is closed, and the gate is connected to the material distribution port when it is not closed.

[0098] Specifically, the leak-proof self-locking pneumatic gate is installed below the position where the bulk material conveying system needs to unload materials.

[0099] Specifically, the bulk material conveying equipment can be bulk material storage and discharge equipment, or bulk material transportation equipment.

[0100] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A leakproof self-locking pneumatic gate, used for opening and closing a gate, the leakproof self-locking pneumatic gate comprising a gate frame (1), a gate plate movable guide mechanism (2) is arranged inside the gate frame (1), a cylinder (3) is installed on the gate frame (1), a gate plate (4) is connected to the output end of the cylinder (3), the output end of the cylinder (3) is telescopic in a lateral direction, and the gate plate (4) is opened and closed by the telescopic drive of the output end of the cylinder (3), characterized in that: The leakproof self-locking pneumatic gate further comprises a first spring (5), a locking mechanism (6), a second spring (7) and a reset mechanism (8); the front side of the locking mechanism (6) is connected to one end of the first spring (5), the other end of the first spring (5) is connected to the first connection structure (101) of the gate frame (1), the middle part of the locking mechanism (6) is pivotally connected to the second connection structure (102) of the gate frame (1), and the rear side of the locking mechanism (6) serves as an operating handle for enabling the front side of the locking mechanism (6) to block the gate plate (4) in a gate-closing state; the reset mechanism (8) is connected to the third connection structure (103) of the gate frame (1), one side of the reset mechanism (8) is connected to one end of the second spring (7), and the other end of the second spring (7) is connected to the fourth connection structure (104) of the gate frame (1); When the gate plate (4) in the gate-closing state is blocked by the locking mechanism (6), the gate is in the closed locked state, one lateral side of the gate plate (4) is blocked by the front side of the locking mechanism (6), the front side of the locking mechanism (6) is in a blocking position, the rear side of the locking mechanism (6) is pressed against a position of the reset mechanism (8), and the reset mechanism (8) is subjected to force from the second spring (7), so that the locking mechanism (6) enables the gate to achieve a self-locking state; When the front side of the locking mechanism (6) leaves the blocking position, the gate is in an unlocked state, the front side of the locking mechanism (6) is in a disengaged position, the rear side of the locking mechanism (6) is pressed against another position of the reset mechanism (8) and the reset mechanism (8) is subjected to force from the second spring (7), so that the locking mechanism (6) realizes the retention state after the gate is unlocked.

2. The leakproof self-locking pneumatic gate according to claim 1 is characterized in that: The locking mechanism (6) comprises a first crank arm connecting rod (61) and a blocking block (62); the first crank arm connecting rod (61) comprises a first front arm (611), a first rod middle portion (612) and a first rear arm (613) which are connected in sequence; the first front arm (611) and the first rear arm (613) form an angle; the first front arm (611) and the blocking block (62) are longitudinally fixedly connected, and the front side of the locking mechanism (6) comprises the first front arm (611) and the blocking block (62); the first rear arm (613) serves as the rear side of the locking mechanism (6); the first rod middle portion (612) is pivotally connected to the second connecting structure (102) of the gate frame (1); When the blocking block (62) follows the first front arm (611) to swing toward the plane where the gate plate (4) moves laterally and moves from the disengaged position to the blocking position, one lateral side of the gate plate (4) is blocked by the blocking block (62), so that the locking mechanism (6) enables the gate to achieve a self-locking state.

3. The leakproof self-locking pneumatic gate according to claim 2 is characterized in that: The gate frame (1) is provided with a limiting slot (11); a locking shaft (6131) is protruded at the end of the first rear arm (613) toward the limiting slot (11); the locking shaft (6131) is embedded in the limiting slot (11), and when the first rear arm (613) swings, the locking shaft (6131) moves in an arc track in the limiting slot (11); when the gate is self-locking, the locking shaft (6131) is located at the lower section of the limiting slot (11); when the locking mechanism (6) realizes the holding state after the gate is unlocked, the locking shaft (6131) is located at the upper section of the limiting slot (11).

4. The leakproof self-locking pneumatic gate according to claim 3 is characterized in that: The reset mechanism (8) is pivotally connected to the gate frame (1); and the second spring (7) is a tension spring.

5. The leakproof self-locking pneumatic gate according to claim 4 is characterized in that: The reset mechanism (8) is a second crank arm connecting rod; the second crank arm connecting rod comprises a second front arm (81), a second rod middle portion (82) and a second rear arm (83) which are connected in sequence; the second front arm (81) and the second rear arm (83) form an angle; one end of the second front arm (81) is connected to one end of a second spring (7), and the other end of the second spring (7) is connected to a fourth connecting structure (104) of the gate frame (1); the middle portion of the second front arm (81) is pivotally connected to the third connecting structure (103) of the gate frame (1); When the gate is in a self-locking state, the locking shaft (6131) is pressed against a position of the middle portion (82) of the second rod of the reset mechanism (8), so that the locking shaft (6131) and the second front arm (81) are kept in a mutually pressed state that can be unlocked; When the locking mechanism (6) is in a holding state after the gate is unlocked, the locking shaft (6131) is pressed against another position of the middle portion (82) of the second rod of the reset mechanism (8), so that the locking shaft (6131) and the middle portion (82) of the second rod are kept in a mutually pressed state that can be unlocked; The first rear arm (613) is lifted by overcoming the action force of the second spring (7) so that the gate is transformed from a self-locking state to a holding state after the gate is unlocked; When the gate plate (4) pushes the second rear arm (83) to swing in a direction away from the plane where the gate plate (4) moves laterally, the second front arm (81) tilts upward, thereby causing the gate to change from a holding state after the gate is unlocked to a self-locking state.

6. The leakproof self-locking pneumatic gate according to claim 5, characterized in that: The gate frame (1) is further provided with an upper limit structure (111) and a lower limit structure (112); the locking mechanism (6) rotates around a pivot virtual axis within an angle range, the upper limit structure (111) is used to limit the locking mechanism (6) from rotating to one limit position, and the lower limit structure (112) is used to limit the locking mechanism (6) from rotating to another limit position; The upper limit structure (111) is used to limit the first rear arm (613) from swinging to the upper limit position, and the lower limit structure (112) is used to limit the first rear arm (613) from swinging to the lower limit position; The upper slot end position of the limiting through slot (11) is an upper limit position structure, and the lower slot end position of the limiting through slot (11) is a lower limit position structure.

7. The leakproof self-locking pneumatic gate according to claim 5 or 6, characterized in that: The angle between the first front arm (611) and the first rear arm (613) is a first virtual obtuse angle, and the opening of the first virtual obtuse angle faces away from the gate plate (4); the angle between the second front arm (81) and the second rear arm (83) is a second virtual obtuse angle, and the opening of the second virtual obtuse angle faces away from the gate plate (4); the middle part (82) of the second rod is provided with an arched protrusion in the direction toward the gate plate (4), and a clamping recess (820) of the middle part (82) of the second rod is formed between the arched protrusion and the second rear arm (83); when the locking mechanism (6) realizes the holding state after the gate is unlocked, the locking shaft (6131) is pressed against the clamping recess (820) by the action force of the second spring (7); A handle serving as an extension of the locking shaft (6131) is protruded from the end of the first rear arm (613) and faces away from the limiting through slot (11); When the gate is in a self-locking state, the locking shaft (6131) is pressed against the connecting rod arm between the arched protrusion of the reset mechanism (8) and the end of the second front arm (81), so that the locking shaft (6131) and the second front arm (81) are kept in a mutually pressed state that can be unlocked; When the locking mechanism (6) is in a holding state after the gate is unlocked, the locking shaft (6131) is pressed against the clamping recess (820), so that the locking shaft (6131) and the middle part of the second rod (82) are kept in unlockable mutual pressing; The handle is lifted by overcoming the action force of the second spring (7) so that the gate is transformed from a self-locking state to a holding state after the gate is unlocked; When the gate plate (4) is opened and the gate plate (4) pushes the second rear arm (83) to swing, the locking shaft (6131) is released from the state of being pressed by the engaging recess (820), and then when the gate plate (4) is closed, the gate plate (4) leaves the upper part of the engaging block (62), so that the engaging block (62) moves from the disengaging position to the blocking position, thereby realizing the gate self-locking state.

8. The leakproof self-locking pneumatic gate according to claim 7, characterized in that: A roller (831) is provided at the end of the second rear arm (83); the roller (831) is used to reduce the friction force when the gate plate (4) moves laterally and hits the roller (831); The limiting groove (11) is arc-shaped; The locking shaft (6131) is arranged longitudinally.

9. The leakproof self-locking pneumatic gate according to any one of claims 1 to 6, characterized in that: The first spring (5) is a tension spring; when the gate is self-locking, the first spring (5) is in a contracted state; when the locking mechanism (6) achieves a holding state after the gate is unlocked, the first spring (5) is in an extended state; The second connection structure (102) and the third connection structure (103) are both located below the plane where the gate plate (4) moves laterally, and the second connection structure (102) is located laterally between the gate and the third connection structure (103).

10. A bulk material conveying equipment using the leakproof self-locking pneumatic gate according to any one of claims 1 to 9, characterized in that: The bulk material conveying equipment comprises a bulk material conveying equipment provided with a material distribution port and the leakproof self-locking pneumatic gate installed at the material distribution port. When the gate is closed, the gate plate (4) closes the material distribution port. When the gate is not closed, the gate is connected to the material distribution port.

Images