A novel material position detection device for the hopper of a dry ice briquetting machine

Abstract

This utility model discloses a novel material position detection device for a dry ice briquetting machine hopper, relating to the field of dry ice production technology. It includes a hopper, a support frame, a detection cylinder assembly, a buzzer, a feeding guide plate, a screw conveyor, and a pushing assembly. Three sensors are installed outside the pressing cylinder of the detection cylinder assembly to monitor the extension and retraction of the piston rod of the pressing cylinder in real time, automatically determining whether the hopper needs feeding. Based on the detection results, the screw conveyor is automatically started and stopped, achieving precise control of dry ice particle supply. Furthermore, the piston rod of the pressing cylinder drives the briquetting block to periodically press the dry ice particles in the hopper, effectively breaking up material arching and reducing the risk of material blockage. Through the three sensors and preset extension and retraction timeout judgment conditions, a fault alarm for the pressing cylinder is triggered, and the operation of the pressing cylinder is stopped promptly in case of a fault, facilitating timely handling by operators.

Description

Technical Field

[0001] This utility model relates to the field of dry ice production technology, specifically to a novel material position detection device for a dry ice briquetting machine hopper. Background Technology

[0002] In the dry ice briquetting process, the hopper, as a temporary storage and transfer device for dry ice particles, directly affects the briquetting efficiency and product quality due to the stable control of the material position inside it. Traditional dry ice briquetting machines often lack precise material position detection and feedback mechanisms in their hoppers, which can easily lead to the following problems:

[0003] Dry ice particles are relatively loose in texture and tend to accumulate in the hopper, forming an arched structure, which prevents the material from falling smoothly to the pusher assembly. This requires manual intervention to clear the blockage and affects the continuity of production.

[0004] The amount of material in the hopper cannot be determined in real time. If the material is insufficient, the amount of dry ice pushed to the briquetting mold by the pushing component will be insufficient, which will result in incomplete briquetting. If the material is excessive, the excess material may overflow the hopper, resulting in waste of dry ice.

[0005] Frequent manual observation of the dry ice level in the hopper is required to determine whether additional material needs to be added, and the screw conveyor must be started and stopped manually. This not only increases labor costs but also makes it easy for human error to affect production stability. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this utility model provides a novel material position detection device for the hopper of a dry ice briquetting machine, which solves the aforementioned problems.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model is implemented through the following technical solution: A novel material position detection device for a dry ice briquetting machine hopper, comprising a hopper, a support frame, a detection cylinder assembly, and a buzzer. The top edge of the hopper is connected to the discharge end of a feeding guide plate, which is fixed to the discharge port of a screw conveyor. A pushing assembly is provided at the bottom of the hopper. The support frame is fixed to the top of the hopper. The detection cylinder assembly and the buzzer are both mounted on the support frame. The detection cylinder assembly includes a pressing cylinder, a mounting groove, a sensor 1, a sensor 2, a sensor 3, a piston rod, and a pressing block. The outer wall of the pressing cylinder has a vertically formed mounting groove. The sensor 1, sensor 2, and sensor 3 are installed sequentially from bottom to top in the mounting groove. The bottom end of the piston rod of the pressing cylinder is fixedly connected to the pressing block.

[0010] Sensor 1 is used to detect the fully extended state of the piston of the pressing cylinder, sensor 2 is used to detect the initial retraction state of the piston of the pressing cylinder, and sensor 3 is used to detect the fully retracted state of the piston of the pressing cylinder.

[0011] Preferably, the support frame has a through hole in the middle, and the piston rod of the pressing cylinder vertically passes through the through hole in the middle of the support frame.

[0012] Preferably, the buzzer is used to alarm for abnormal conditions of the pressure cylinder.

[0013] Preferably, the outer diameter of the pressure block is set to gradually decrease upwards.

[0014] Preferably, the feeding assembly includes a support plate, a limiting frame, a feeding frame, a baffle, a slider, a slide rail, and a feeding cylinder. The limiting frame is fixed to the top left side of the support plate, and the feeding frame is provided inside the limiting frame. The baffle is fixed to the top right side of the feeding frame. The slider is fixed to both the front and rear sides of the bottom end of the baffle. The slider slides along the slide rail, and the slide rail is fixed to the top of the support plate. The feeding cylinder is fixed to the top right side of the support plate and is used to drive the feeding frame to move laterally. The top of the limiting frame is fixedly connected to the hopper.

[0015] Preferably, the top surfaces of the pusher frame and the baffle are arranged on the same plane, and the pusher frame is in contact with the bottom wall of the hopper.

[0016] (III) Beneficial Effects

[0017] This utility model provides a novel material position detection device for the hopper of a dry ice briquetting machine. It has the following beneficial effects:

[0018] By setting up a detection cylinder assembly, and installing three sensors on the outside of the pressing cylinder of the detection cylinder assembly, the extension and retraction status of the piston rod of the pressing cylinder is monitored in real time. When the piston rod is obstructed when it extends, it is determined that the hopper is full; when it extends smoothly, it is determined that the hopper is not full. The system automatically determines whether the hopper needs to be filled and, based on the detection results, automatically controls the start and stop of the screw conveyor. This achieves precise control of dry ice pellet supply, avoids material overflow and waste, and the piston rod of the pressing cylinder drives the pressing block to periodically press the dry ice pellets in the hopper, which can effectively break the arching phenomenon of materials and reduce the risk of material blockage.

[0019] Three sensors installed on the outside of the pressing cylinder, along with preset extension and retraction timeout judgment conditions, can realize fault alarms for the pressing cylinder and stop its operation in time when a fault occurs, so that operators can handle it in time and avoid production interruption caused by the fault escalating. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the support frame structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the detection cylinder assembly structure in this utility model;

[0023] Figure 4 This utility model Figure 3 A magnified view of a portion of area A;

[0024] Figure 5 This is a schematic diagram of the material pushing component in this utility model.

[0025] In the diagram: hopper-1, support frame-2, detection cylinder assembly-3, buzzer-4, feeding guide plate-5, screw conveyor-6, pushing assembly-7;

[0026] Material pressing cylinder-31, mounting slot-32, sensor one-33, sensor two-34, sensor three-35, piston rod-36, pressing block-37;

[0027] Support plate-71, limit frame-72, pusher frame-73, baffle-74, slider-75, slide rail-76, pusher cylinder-77. Detailed Implementation

[0028] 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.

[0029] Please see Figure 1-5 This utility model provides a technical solution for a material position detection device for a dry ice briquetting machine hopper: including a hopper 1, a support frame 2, a detection cylinder assembly 3 and a buzzer 4. The top edge of the hopper 1 is connected to the discharge end of the feeding guide plate 5. The feeding guide plate 5 is fixed at the discharge port of the screw conveyor 6. A pushing assembly 7 is provided at the bottom of the hopper 1.

[0030] The support frame 2 is fixed to the top of the hopper 1. The detection cylinder assembly 3 and the buzzer 4 are both installed on the support frame 2. The detection cylinder assembly 3 includes a pressing cylinder 31, a mounting groove 32, a sensor 1 33, a sensor 2 34, a sensor 35, a piston rod 36, and a pressing block 37. The outer wall of the pressing cylinder 31 is vertically provided with a mounting groove 32. The sensor 1 33, sensor 2 34, and sensor 35 are installed in the mounting groove 32 from bottom to top. The bottom end of the piston rod 36 of the pressing cylinder 31 is fixedly connected to the pressing block 37.

[0031] Sensor 1 33 is used to detect the fully extended state of the piston of the pressing cylinder 31, sensor 2 34 is used to detect the initial state of the piston retraction of the pressing cylinder 31, and sensor 3 35 is used to detect the fully retracted state of the piston of the pressing cylinder 31.

[0032] Since the piston of the pressing cylinder 31 is linked with the piston rod 36, the piston rod's fully extended and fully retracted state is determined by detecting the piston position.

[0033] The outer diameter of the pressing block 37 is set to gradually decrease upward to prevent dry ice particles from accumulating on the pressing block 37. A through hole is opened in the middle of the support frame 2, and the piston rod 36 of the pressing cylinder 31 vertically passes through the through hole opened in the middle of the support frame 2. The buzzer 4 is used to alarm the abnormal state of the pressing cylinder 31.

[0034] The pressing cylinder 31 uses a piston with a built-in magnetic ring and a cylinder with a standard T-mounting groove 32 on the outside. Sensor 1 33, sensor 2 34 and sensor 3 35 all use DMSJ sensors. When the piston with the built-in magnetic ring moves into the detection range of the DMSJ sensor, it can trigger the detection of the DMSJ sensor.

[0035] The extension and retraction control method of the piston rod 36 of the pressing cylinder 31 is a mature existing technology. The air inlet of the pressing cylinder 31 is equipped with a solenoid valve, and the extension and retraction of the piston rod 36 of the pressing cylinder 31 are controlled by controlling the solenoid valve.

[0036] Sensor 2 34 is installed two centimeters away from sensor 1 33, and the piston thickness magnetic ring of the pressing cylinder 31 is less than two centimeters. This ensures that the piston magnetic ring of the pressing cylinder 31 can immediately cover sensor 2 34 after it is removed from sensor 1 33, and avoids triggering sensor 1 33 and sensor 2 34 at the same time, which may lead to misjudgment.

[0037] When the pressing cylinder 31 needs to retract after pressing down, the piston magnetic ring of the pressing cylinder 31 leaves the sensor 1 33 and quickly triggers the sensor 2 34. The trigger sensor 2 34 determines that the piston has left the critical point of full extension and enters the safe retraction stroke.

[0038] The feeding assembly 7 includes a support plate 71, a limiting frame 72, a feeding frame 73, a baffle 74, a slider 75, a slide rail 76, and a feeding cylinder 77. The limiting frame 72 is fixed to the top left side of the support plate 71. The feeding frame 73 is disposed inside the limiting frame 72. The baffle 74 is fixed to the top right side of the feeding frame 73. Slider 75 is fixed to both the front and rear sides of the bottom end of the baffle 74. The slider 75 slides along the slide rail 76, and the slide rail 76 is fixed to the top of the support plate 71. The feeding cylinder 77 is fixed. At the top right of the support plate 71, the pusher cylinder 77 is used to drive the pusher frame 73 to move laterally. The top of the limiting frame 72 is fixedly connected to the hopper 1. The top surfaces of the pusher frame 73 and the baffle 74 are set on the same plane, and the pusher frame 73 is attached to the bottom wall of the hopper 1, so that the dry ice particles in the hopper 1 fall into the pusher frame 73. After the pusher frame 73 is pushed out onto the dry ice pressing mold, the bottom of the hopper 1 is closed by the baffle 74 to stop the falling of dry ice particles in the hopper 1.

[0039] The implementation principle of this application embodiment is as follows:

[0040] During normal operation, dry ice particles are conveyed to the feeding guide plate 5 by the screw conveyor 6. The feeding guide plate 5 guides the dry ice particles into the hopper 1. The dry ice particles in the hopper 1 fall into the pushing frame 73. By controlling the pushing cylinder 77, the pushing frame 73 and the dry ice particles inside it are moved to the dry ice pressing mold, so that the dry ice particles fall into the dry ice pressing mold. Then, the pushing cylinder 77 is controlled to drive the pushing frame 73 back to the bottom of the hopper 1.

[0041] When the pusher frame 73 retracts to the bottom of the hopper 1, the piston rod 36 of the pressing cylinder 31 is controlled to move back and forth once. When the piston rod 36 of the pressing cylinder 31 extends, the piston rod 36 presses down on the dry ice in the hopper 1 through the pressing block 37 at the bottom to prevent the dry ice from arching and making it impossible to discharge.

[0042] The state of the piston rod 36 of the pressing cylinder 31 is detected by sensors 33, 34, and 35 installed on the cylinder. The conditions for determining the state of the piston rod 36 of the pressing cylinder 31 are as follows:

[0043] 1. When the piston rod 36 of the pressing cylinder 31 extends, it triggers the second sensor 34 and the first sensor 33 in sequence. If the material is not full, the screw conveyor 6 will continue to operate if it is in working state, and start the screw conveyor 6 if it is not in working state.

[0044] 2. The piston rod 36 of the pressing cylinder 31 retracts after a timeout and does not trigger sensor 2 34, but triggers sensor 3 35, which determines that sensor 2 34 is faulty and triggers buzzer 4 to sound an alarm.

[0045] 3. If the piston rod 36 of the pressing cylinder 31 retracts after a timeout and fails to trigger sensor 2 34 and sensor 3 35, or if sensor 2 34 is triggered but sensor 3 35 is not, it is determined that the piston of the pressing cylinder 31 is stuck and cannot retract normally, triggering the buzzer 4 alarm.

[0046] 4. If the piston rod 36 of the pressing cylinder 31 extends beyond the timeout and does not trigger sensor 1 33 and sensor 2 34, it is determined that the downward pressure of the pressing cylinder 31 is blocked, that is, the hopper 1 is full of material. At this time, the controller automatically cuts off the extension signal of the pressing cylinder 31, and at the same time outputs the retraction signal of the piston rod 36 of the pressing cylinder 31 and the signal to stop the screw conveyor 6. When the piston rod 36 of the pressing cylinder 31 retracts, the bottom sensor 1 33 is disconnected, the middle sensor 2 34 is immediately triggered, and the piston rod 36 is finally fully retracted to trigger sensor 3 35.

[0047] When the piston rod 36 of the primary pressing cylinder 31 extends after the hopper 1 is determined to be full, the sensor 33 is triggered, and the screw conveyor 6 is started to continue working, continuing to transport dry ice particles into the hopper 1.

[0048] 5. If the extension is blocked 3 times in a row, it is determined that the piston rod 36 of the pressing cylinder 31 is malfunctioning or the system is abnormal, and the buzzer 4 is triggered to sound an alarm.

[0049] The conditions for determining whether the piston rod 36 of the pressing cylinder 31 has exceeded the extension or retraction timeout are as follows:

[0050] 1. The piston rod 36 of the pressing cylinder 31 extends for too long: The actual measured time from the start of extension of the piston rod 36 of the pressing cylinder 31 from the state of trigger sensor 35 to the state of trigger sensor 1 33 plus the safety margin time.

[0051] 2. The piston rod 36 of the pressing cylinder 31 retracts too long: The actual measured time for the piston rod 36 of the pressing cylinder 31 to retract from the state of trigger sensor 1 33 to the state of trigger sensor 35 plus the safety margin time.

[0052] The control method of this utility model is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail.

[0053] 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. A novel material position detection device for a dry ice briquetting machine, comprising a hopper (1), wherein the top edge of the hopper (1) is connected to the discharge end of a feeding guide plate (5), the feeding guide plate (5) is fixed at the discharge port of a screw conveyor (6), and a pushing assembly (7) is provided at the bottom of the hopper (1). characterized in that It also includes a support frame (2), a detection cylinder assembly (3) and a buzzer (4). The support frame (2) is fixed to the top of the hopper (1). The detection cylinder assembly (3) and the buzzer (4) are both installed on the support frame (2). The detection cylinder assembly (3) includes a pressing cylinder (31), a mounting groove (32), a sensor one (33), a sensor two (34), a sensor three (35), a piston rod (36) and a pressing block (37). The outer wall of the pressing cylinder (31) is vertically provided with a mounting groove (32). The sensor one (33), sensor two (34), and sensor three (35) are installed in the mounting groove (32) from bottom to top. The bottom end of the piston rod (36) of the pressing cylinder (31) is fixedly connected to the pressing block (37). The sensor 1 (33) is used to detect the piston of the pressing cylinder (31) when it is fully extended, the sensor 2 (34) is used to detect the piston of the pressing cylinder (31) when it is retracting, and the sensor 3 (35) is used to detect the piston of the pressing cylinder (31) when it is fully retracted.

2. The novel material position detection device for a dry ice briquetting machine according to claim 1, characterized in that: The support frame (2) has a through hole in the middle, and the piston rod (36) of the pressing cylinder (31) vertically passes through the through hole in the middle of the support frame (2).

3. The new dry ice briquette machine hopper material position detection device according to claim 1, characterized in that: The buzzer (4) is used to alarm for abnormal conditions of the pressing cylinder (31).

4. The new dry ice briquette machine hopper material position detection device according to claim 1, characterized in that: The outer diameter of the pressure block (37) is set to gradually decrease upward.

5. The new type of dry ice briquette machine hopper material position detection device according to claim 1, characterized in that: The feeding assembly (7) includes a support plate (71), a limiting frame (72), a feeding frame (73), a baffle (74), a slider (75), a slide rail (76), and a feeding cylinder (77). The limiting frame (72) is fixed on the top left side of the support plate (71). The feeding frame (73) is provided inside the limiting frame (72). The baffle (74) is fixed on the top right side of the feeding frame (73). The slider (75) is fixed on both the front and rear sides of the bottom end of the baffle (74). The slider (75) slides along the slide rail (76), and the slide rail (76) is fixed to the top of the support plate (71). The feeding cylinder (77) is fixed to the top right side of the support plate (71). The feeding cylinder (77) is used to drive the feeding frame (73) to move laterally. The top of the limiting frame (72) is fixedly connected to the hopper (1).

6. The new type of dry ice briquette machine hopper material position detection device according to claim 5, characterized in that: The top surfaces of the pusher frame (73) and the baffle (74) are set on the same plane, and the pusher frame (73) is attached to the bottom wall of the hopper (1).

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