Movable discharging door

Abstract

The utility model relates to the technical field of automatic sliver weighing, and discloses a movable discharging door which comprises valve mechanisms symmetrically arranged on the two sides of the bottom of a weighing hopper, each valve mechanism comprises a valve body installed on the weighing hopper in a rotatable mode and a driving assembly used for driving a movable body to rotate, the valve bodies rotate, and the movable bodies are driven by the driving assembly to rotate. The bottom of the weighing hopper can be closed or opened through the two valve bodies, the movable edges of the two valve bodies are each provided with a first sealing strip, and when the two valve bodies are in the closed state, the two first sealing strips make contact with each other. The movable door is used as a bottom plate of the material container, and has the effects of preventing materials from leaking and avoiding sparks generated by collision in an anti-explosion area at the same time.

Description

Technical Field

[0001] This utility model relates to the field of automatic weighing technology for stalks, and in particular to a material discharge gate. Background Technology

[0002] In cigarette production, the ratio of raw materials such as tobacco and stems is crucial to product quality. Automatic weighing devices can accurately measure the weight of stems to ensure that they are mixed with tobacco and other raw materials in the correct proportion, thus ensuring the consistent quality and taste of each batch of cigarettes. The stems collected by dust removal are usually small solid particles in a loose or suspended state in the weighing hopper. Currently, the automatic weighing device for stems collected by dust removal achieves two purposes: (1) ensuring the continuity of production materials. By automatically controlling the feeding and discharging, it ensures that the materials do not accumulate or block due to weighing. It also ensures the timing interval of feeding, weighing, and discharging, and realizes online measurement of materials and collection of weight data; (2) solving the explosion-proof problem. Electrical explosion-proof in dust explosion environments, especially in Zone 20, requires explosion-proof devices such as sensors, display information tables, and drive components.

[0003] Currently, the feeding of the weighing hopper is controlled by a stalk separation and ash discharge valve. Taking into account the feeding time, static weighing time, and discharge time (the time is determined based on feeding, weighing, and discharge tests), a PLC is used for control. Discharge is controlled by a movable door at the bottom of the weighing hopper.

[0004] Current technology: Existing metal sliding doors generally adopt a single-door structure, with a direct-push cylinder located at the bottom of the weighing hopper controlling the opening and closing of the single door. The control is simple, but the disadvantages are that the sliding door is prone to large gaps when closing, resulting in poor sealing and easy impact and sparks, making it unsuitable for explosion-proof locations. At the same time, online automatic weighing hoppers have requirements for installation space, material uniformity, and material flow rate. Installing single doors and cylinders in confined spaces is extremely difficult. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a material discharge door, which serves as the bottom plate of the material container, ensuring that there is no leakage, while avoiding sparks from impacts within the explosion-proof area, thus eliminating safety hazards.

[0006] This utility model solves the above-mentioned technical problems through the following technical means:

[0007] A discharge gate includes a gate mechanism symmetrically arranged on both sides of the bottom of a weighing hopper. The gate mechanism includes a gate body rotatably mounted on the weighing hopper and a drive assembly for driving the gate body to rotate. The rotation of the gate body can close or open the bottom of the weighing hopper. Each of the two movable edges of the gate body is provided with a first sealing strip. When the two gate bodies are in the closed state, the two first sealing strips are in contact.

[0008] By setting the above structure and adopting a double-door structure, with sealing strips on the moving edges of the two doors, no impact or sparks will be generated when the two doors are closed. At the same time, the two doors have good sealing performance when they are closed. Since the material contained is solid small particles, experiments have proven that there will be no leakage.

[0009] Furthermore, the weighing hopper has fixed plates extending out of its outer side wall and the left and right ends of its outer side wall. The fixed plates are parallel to the outer side wall of the weighing hopper. The drive assembly includes a rotating shaft and a drive component. The rotating shaft is rotatably mounted between the two fixed plates. The axis of the rotating shaft is parallel to the front and rear direction of the weighing hopper. One end of the rotating shaft passes through one of the fixed plates and is fixedly connected to the output end of the drive component.

[0010] By setting up the above structure, it is easy to install the drive components and the rotating shaft, and to occupy as little installation space as possible.

[0011] Furthermore, the driving component is a rotary cylinder.

[0012] By setting up the above structure, the requirements for dust explosion-proof environments are met.

[0013] Furthermore, the pivot has a square section in the middle and circular sections at both ends, and the valve body is detachably mounted on the square section.

[0014] By setting up the above structure, the installation and disassembly of the valve body are convenient and quick, facilitating subsequent maintenance and replacement of the valve body.

[0015] Furthermore, one of the movable sides of the valve body has a sliding cavity extending along the width direction of the valve body and opening towards one side of the end face. An adjusting plate is slidably installed in the sliding cavity. One side of the adjusting plate is located inside the sliding cavity, and the other side extends out of the sliding cavity. The first sealing strip is installed on the side of the adjusting plate outside the valve body. A spring is provided in the sliding cavity. One end of the spring is connected to the side wall of the sliding cavity, and the other end is connected to the side of the adjusting plate located inside the sliding cavity.

[0016] By setting the above structure, when the two valve bodies are in the closed state, the two first sealing strips are in contact, and one of the sealing strips is squeezed, causing the adjusting plate to slide a small distance into the sliding cavity. The spring is compressed, so that the two first sealing strips are in close contact, further ensuring the sealing performance of the valve bodies.

[0017] Furthermore, a limiting groove is formed on the side wall of the sliding cavity along the width direction of the valve body, and a slider is provided on one side of the adjusting plate located in the sliding cavity, the slider being slidably embedded in the limiting groove.

[0018] By setting the above structure, the maximum position of the adjusting plate sliding out of the sliding groove is limited.

[0019] The beneficial effects of this utility model are:

[0020] 1. By setting two valve bodies at the bottom of the weighing hopper, a double-door structure is adopted. The two valve bodies are controlled by two rotary cylinders to open and close. The moving edges of the two valve bodies are equipped with first sealing strips, so that the first sealing strips contact when the two valve bodies are closed without impact or sparks. At the same time, the two valve bodies open and close quickly, and the material is evenly dropped from the middle of the bottom of the weighing hopper during unloading.

[0021] 2. When both valves are closed, the contact of the first sealing strip ensures a good seal. Since the material contained is solid small particles, tests have shown that no leakage occurs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a material discharge door according to this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the valve body in this utility model.

[0024] Figure 3 yes Figure 1 A magnified structural diagram of point A in the middle.

[0025] Figure 4 yes Figure 3 Cross-sectional view.

[0026] in,

[0027] 1. Weighing hopper; 2. Weighing sensor; 3. Rotary cylinder; 4. Coupling; 5. Fixing plate; 6. Mounting plate; 7. Slider; 8. Rotating shaft; 81. Square section; 82. Circular section; 9. Valve body; 10. Air pipe; 11. First sealing strip; 12. Limiting groove; 13. Adjusting plate; 14. Sliding cavity; 15. Spring. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are for illustrative purposes only and represent schematic diagrams, not actual pictures. They should not be construed as limiting the utility model. To better illustrate the embodiments of this utility model, some components in the figures may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the figures for those skilled in the art.

[0029] In the figures of this utility model embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0030] In the relevant technology, weighing sensors 2 are set on the left and right sides of the weighing hopper 1. After the stalk is discharged from the ash discharge valve, it enters the hopper for weighing. The static weighing is carried out for one minute (the time is tested first according to the incoming material situation). Then, the material is discharged through the movable door into the centralized dust collection pipeline.

[0031] like Figure 1-4As shown, the present invention provides a discharge gate, which includes gate mechanisms symmetrically arranged on the left and right sides of the bottom of the weighing hopper 1. The gate mechanism includes a gate body 9 rotatably mounted on the weighing hopper 1 and a drive assembly for driving the gate body to rotate. The rotation of the gate body 9 can close or open the bottom of the weighing hopper 1. Each of the two gate bodies 9 has a first sealing strip 11 on its movable side. When the two gate bodies 9 are in the closed state, the two first sealing strips 11 are in contact. In this embodiment, the sealing strip can be embedded in the gate body 9 or fixed to the gate body 9 by adhesive. The weighing hopper 1 has fixed plates 5 extending out of its front and rear outer walls at both ends, which are fixed by bolts. The fixed plates 5 are parallel to the front and rear outer walls of the weighing hopper 1. The drive assembly includes a rotating shaft 8 and a drive component. The rotating shaft 8 is rotatably mounted between the two fixed plates 5 via bearings. The middle square section 81 of the rotating shaft 8 facilitates the assembly and disassembly of the valve body 9. The two ends of the rotating shaft 8 are round sections 82. The valve body 9 is detachably mounted on the square section 81. Specifically, the valve body 9 is attached to the side wall of the square section 81 and then fixed by bolts. The axis of the rotating shaft 8 is parallel to the front and rear direction of the weighing hopper 1. One end of the rotating shaft 8 passes through one of the fixed plates 5 and is fixedly connected to the output end of the drive component. In this embodiment, the driving component is a rotary cylinder 3. An mounting plate 6 is fixedly installed on the fixed plate 5 by bolts. The output end of the rotary cylinder 3 is fixedly connected to one end of the rotating shaft 8 through a coupling 4. A three-way connector of air pipe 10 is provided on the front outer side wall of the weighing hopper 1. One end of the three-way connector of air pipe 10 is connected to an external air source, and the other two ends are connected to the two rotary cylinders 3 through air pipes 10 respectively. The two rotary cylinders 3 are controlled by a valve island. The two rotary cylinders 3 are controlled simultaneously by a valve island, so that the opening and closing actions of the two valve bodies 9 are consistent, ensuring the uniformity of material discharge.

[0032] One of the valve bodies 9 has a sliding cavity 14 extending along the width direction of the valve body 9 and opening towards one side of the end face. An adjusting plate 13 is slidably installed in the sliding cavity 14. One side of the adjusting plate 13 is located inside the sliding cavity 14, and the other side extends out of the sliding cavity 14. A first sealing strip 11 is glued to the side of the adjusting plate 13 located outside the valve body 9. A spring 15 is provided inside the sliding cavity 14. One end of the spring 15 is fixedly connected to the side wall of the sliding cavity 14, and the other end is fixedly connected to the side of the adjusting plate 13 located inside the sliding cavity 14. In this embodiment, multiple springs 15 are spaced apart along the length direction of the valve body 9.

[0033] A limiting groove 12 is formed on the side wall of the sliding cavity 14 along the width direction of the valve body 9. The limiting groove 12 does not penetrate the valve body 9. A slider 7 is provided on one side of the adjusting plate 13 located in the sliding cavity 14. The slider 7 is slidably embedded in the limiting groove 12. In this embodiment, a limiting groove 12 is provided on the left and right sides of the front and rear ends of the adjusting plate 13. Four sliders 7 are provided corresponding to the limiting grooves 12. When the valve body 9 is in the open state, it will slide outward of the valve body 9 under the action of its own weight. The setting of the sliders 7 and the limiting grooves 12 can limit the maximum position of the adjusting plate 13 sliding out of the sliding groove, and at the same time provide support for the adjusting plate 13.

[0034] In the above embodiment, a slot can be formed on the valve body 9, corresponding to the bottom edge of the weighing hopper 1. A second sealing strip is provided in the slot. The second sealing strip can be snapped into the slot or fixed in the slot with screws. When both valve bodies 9 are in the closed state, the two second sealing strips contact the bottom edge of the weighing hopper 1 respectively, ensuring the sealing of the weighing hopper 1. In this embodiment, neither the slot nor the second sealing strip is shown in the figure.

[0035] In the above embodiments, since it is necessary to set up structures such as sliding cavity 14 and slot, the thickness of the valve body 9 can be appropriately increased.

[0036] Working principle:

[0037] In use, the valve island simultaneously controls the operation of two rotary cylinders 3, causing the two valve bodies 9 to close in unison. The two valve bodies 9 rotate around their respective pivots 8, and the moving edges of the two valve bodies 9 come into contact when the valve bodies 9 complete the closing action. The two first sealing strips 11 also come into contact. As the rotation continues, the adjusting plate 13 of one of the valve bodies 9 is squeezed into the sliding cavity 14. Under the action of the spring 15, the two first sealing strips 11 come into close contact, completing the sealing of the weighing hopper 1. After the stalk is discharged from the ash discharge valve, it enters the hopper for weighing. Static weighing is performed for one minute. Then, the two valve bodies 9 rotate back to open the bottom of the weighing hopper 1 for unloading. The weighed stalk enters the centralized dust collection pipeline for the next process.

[0038] The movable door provided by this utility model has a simple structure and is easy to use. Without affecting equipment operation or site specifications, it makes full use of existing space. The double-door structure saves a lot of installation space compared to the traditional single-door structure controlled by a direct-push cylinder. At the same time, during unloading, the material falls from the middle of the bottom of the weighing hopper 1, which can fall accurately and easily into the centralized dust collection pipe below. The movable edges of the two door bodies 9 are equipped with first sealing strips 11. When the two door bodies 9 are closed, there will be no metal impact or sparks. When the two door bodies 9 are closed, the bottom of the weighing hopper 1 is well sealed. Since the material contained is solid small particles, the test has proven that there is no leakage. The detachable installation of the door bodies 9 allows for quick replacement of door bodies 9 of different thicknesses, which is convenient for maintenance and replacement.

[0039] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model. Technologies, shapes, and structural parts not described in detail in this utility model are all known technologies.

Claims

1. A material discharge gate, characterized in that: The weighing hopper (1) includes symmetrically arranged valve mechanisms on both sides of its bottom. Each valve mechanism includes a valve body (9) rotatably mounted on the weighing hopper (1) and a drive assembly for driving the movable body to rotate. The rotation of the valve body (9) can close or open the bottom of the weighing hopper (1). Each movable side of the two valve bodies (9) is provided with a first sealing strip (11). When the two valve bodies (9) are in the closed state, the two first sealing strips (11) are in contact.

2. The material discharge gate according to claim 1, characterized in that: The weighing hopper (1) has fixed plates (5) extending out of its front and rear outer walls at both ends. The fixed plates (5) are parallel to the front and rear outer walls of the weighing hopper (1). The drive assembly includes a rotating shaft (8) and a drive component. The rotating shaft (8) is rotatably mounted between the two fixed plates (5). The axis of the rotating shaft (8) is parallel to the front and rear direction of the weighing hopper (1). One end of the rotating shaft (8) passes through one of the fixed plates (5) and is fixedly connected to the output end of the drive component.

3. A material discharge gate according to claim 2, characterized in that: The driving component is a rotary cylinder (3).

4. A material discharge gate according to claim 2, characterized in that: The pivot (8) has a square section (81) in the middle and circular sections (82) at both ends. The valve body (9) is detachably installed on the square section (81).

5. A discharge gate according to claim 1, characterized in that: One of the valve bodies (9) has a sliding cavity (14) on the end face of the movable side, which extends along the width direction of the valve body (9) and opens toward one side of the end face. An adjusting plate (13) is slidably installed in the sliding cavity (14). One side of the adjusting plate (13) is located in the sliding cavity (14), and the other side extends out of the sliding cavity (14). The first sealing strip (11) is installed on the side of the adjusting plate (13) located outside the valve body (9). A spring (15) is provided in the sliding cavity (14). One end of the spring (15) is connected to the side wall of the sliding cavity (14), and the other end is connected to the side of the adjusting plate (13) located in the sliding cavity (14).

6. A discharge gate according to claim 5, characterized in that: The side wall of the sliding cavity (14) is provided with a limiting groove (12) along the width direction of the valve body (9). The adjusting plate (13) is provided with a slider (7) on one side inside the sliding cavity (14). The slider (7) is slidably embedded in the limiting groove (12).

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