On-line metal impurity and sealing air tightness detection device for powder product

Abstract

The utility model relates to the technical field of package detection, and discloses a powder product on-line metal impurity and seal air tightness detection device which comprises a belt conveyor, a metal detector and a first cylinder. The device further comprises a supporting table, a tray and a pressing plate. The first air cylinder is arranged over the belt conveyor through a supporting frame. The movable end of the first air cylinder is located on the lower portion, and a pressing plate is detachably and fixedly arranged at the movable end of the first air cylinder. The vertically-downward projection of the pressing plate falls on the upper surface of an upper conveying belt of the belt conveyor. The tray is placed on the upper conveying belt, and when the upper conveying belt carries the tray to move to the position under the pressing plate, the vertically-downward projection of the pressing plate falls into the tray. According to the utility model, the sealing air tightness and metal impurities of powder products are detected, and the powder products with air leakage in the sealing can be recovered in time after detection; and the supporting table can provide stable support during the sealing performance detection of the seal, so that the whole detection process is more stable.

Description

Technical Field

[0001] This utility model belongs to the field of packaging testing technology, and in particular relates to an online detection device for metal impurities and sealing airtightness of powder products. Background Technology

[0002] Powders require packaging during both sale and storage to prevent them from becoming damp, oxidized, or contaminated with impurities. Powder bag packaging is the most common method, creating a ready-to-sell and transport product after the powder is sealed. However, the airtightness of the seal must be tested before sale or transport to prevent the production of poorly sealed powder products. Current technology often uses testing devices to verify the airtightness of the seal.

[0003] Chinese utility model patent CN221694390U, entitled "Pre-packaged Food Packaging Bag Leakage Detection Equipment," discloses a pre-packaged food packaging bag leakage detection device, including a base plate and a collection box. A bottom box is fixedly connected to the top of the base plate, and an L-shaped plate is fixedly connected to the back side of the top of the bottom box. A fixed box is fixedly connected to the back side of the L-shaped plate. This pre-packaged food packaging bag leakage detection device, by incorporating a servo motor, can drive a screw to rotate. The screw, through its threaded design, can drive a screw sleeve to move back and forth. The screw sleeve, through a connecting plate and a push rod, can drive a push plate to move back and forth, facilitating the forward pushing of defective packaging bags for automatic sorting. This improves overall practicality and solves the problem that existing leakage detection equipment cannot automatically sort defective packaging bags, wasting unnecessary time and manpower, reducing production speed, and thus being inconvenient for users.

[0004] However, the aforementioned device presents various problems when used with powder products. Due to the small particle size of the powder, if air leaks during the pressing process, the powder inside will also leak out with the gas, contaminating the conveyor belt and making it difficult to recover. Furthermore, the device directly uses the conveyor belt as support to squeeze the packaging bag, and the area under the conveyor belt is not flat. During the pressing process, the powder in the packaging bag may be squeezed together with the packaging bag and the conveyor belt between the idlers of the adjacent conveyor belt, which may subsequently hinder normal conveying.

[0005] Therefore, there is an urgent need for an online detection device for metal impurities and sealing airtightness of powder products to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to overcome the existing technical problems and provide an online detection device for metal impurities and sealing airtightness of powder products.

[0007] To achieve the above objectives, this utility model is implemented according to the following technical solution:

[0008] An online metal impurity and sealing airtightness detection device for powder products includes a belt conveyor, a metal detector, and a first cylinder; it also includes a support platform, a tray, and a pressure plate.

[0009] The first cylinder is mounted directly above the belt conveyor via a support frame; the movable end of the first cylinder is located below, and a pressure plate is detachably and fixedly mounted on the movable end of the first cylinder; the vertical downward projection of the pressure plate falls on the upper surface of the upper conveyor belt of the belt conveyor.

[0010] The support platform includes a rectangular platform and supporting legs; the platform is located between the upper and lower conveyor belts of the belt conveyor directly below the pressure plate.

[0011] The pressure plate has a hollow structure, and the metal detector is installed inside the pressure plate;

[0012] The pallet is placed on the upper conveyor belt. When the upper conveyor belt carries the pallet to directly below the pressure plate, the vertical downward projection of the pressure plate falls into the pallet.

[0013] Preferably, the bottom of the tray is sized to match the pressure plate. This arrangement allows the pressure plate to completely cover the powder product placed in the tray.

[0014] In use, the powder product to be tested is placed on a tray and transported by a belt conveyor to directly beneath the pressure plate. A cylinder then drives the pressure plate downwards, compressing the powder product for sealing and airtightness testing. A metal detector within the pressure plate also detects the presence of metal impurities. If leakage occurs, powder will leak into the tray, which can then be recovered along with the tray. If metal impurities are detected, the metal detector will sound an alarm, stopping the test and allowing the abnormal powder product to be recovered.

[0015] The belt conveyor, metal detector, cylinder, etc. used in this utility model are all existing technologies, well known to those skilled in the art, and will not be described in detail here. The pressure when the cylinder drives the pressure plate to press down is set according to the actual testing requirements. Those skilled in the art can set it according to the actual usage requirements. Specifically, it needs to meet the sealing requirements of the compression test without crushing the well-sealed packaging.

[0016] The trays used in this invention are selected based on actual usage requirements, with the primary goal of preventing powder from overflowing. Trays of different depths can be selected according to the size of the powder product; no further restrictions are placed on the size of the trays here.

[0017] Specifically, the conveyor belt of the belt conveyor can be made of high-hardness nylon.

[0018] Preferably, the upper surface of the tabletop is evenly distributed with multiple omnidirectional balls.

[0019] Specifically, omnidirectional balls can be selected from nylon omnidirectional balls, plastic omnidirectional balls, nylon bullseye omnidirectional balls, etc.

[0020] The top of the omnidirectional ball contacts the lower end of the upper conveyor belt. The omnidirectional ball arrangement can meet the conveying needs of the upper conveyor belt while avoiding direct contact between the upper end of the platform and the lower end of the upper conveyor belt. The contact between the omnidirectional ball and the upper conveyor belt reduces wear on the upper conveyor belt. At the same time, the evenly distributed omnidirectional balls can also provide good support for the pallet and withstand the pressure of the pressure plate.

[0021] Preferably, it also includes a feeding conveyor belt, a feeding cylinder, and a push plate;

[0022] The feeding cylinder is located on the left side of the support platform and on the upper part of the rear side of the belt conveyor. The movable end of the feeding cylinder moves back and forth in the horizontal direction. A push plate is fixedly installed on the movable end of the feeding cylinder. The feeding conveyor belt is located on the left side of the support platform and on the front side of the belt conveyor, and is perpendicular to the conveying direction of the belt conveyor.

[0023] The position of the push plate corresponds to the position of the feeding conveyor.

[0024] In use, multiple pallets are arranged at equal intervals on the upper conveyor belt. After the powder product on the pallet is inspected, it will move to the station corresponding to the push plate. The pallet and the push plate are aligned and the pallet moves to the front of the push plate. If the powder product in the pallet leaks air, the push plate can be driven to push the pallet to the unloading conveyor belt to transport the unqualified powder product out for recycling.

[0025] Preferably, infrared receivers and infrared transmitters are symmetrically arranged on the belt conveyor on the right side of the support platform.

[0026] The infrared receiver and transmitter facilitate the transmission of signals from the tray's movement under the pressure plate to the pneumatic valve of the cylinder, enabling convenient control of the cylinder's up-and-down movement. The selection of the infrared receiver and transmitter models, as well as their control method with the pneumatic valve, are existing technologies, well-known to those skilled in the art, and will not be described in detail here.

[0027] Preferably, it also includes limit strip A and limit strip B;

[0028] Limiting strips A and B are detachably and fixedly installed on the upper end face of the upper conveyor belt. Limiting strips A and B are parallel to each other and perpendicular to the conveying direction of the belt conveyor. The spacing between limiting strips A and B matches the left and right lengths of the pallet.

[0029] Preferably, it also includes guide component A;

[0030] The guide component A is installed on the belt conveyor on the right side of the support platform; the guide component A includes two guide plates A, which are symmetrically arranged front and back to form a funnel-shaped channel that is smaller on the left and larger on the right.

[0031] The detachable and fixed installation of limit strips A and B can be achieved using existing technology. For example, adhesive or tape that can be repeatedly applied can be used to attach them; or soluble glue can be used to attach limit strips A and B. When limit strips A and B are no longer needed, the glue can be dissolved using a suitable solvent to remove them.

[0032] Limiting strips A and B are used to limit the movement of the pallet. The pallet is placed between limiting strips A and B, and then guided by guide component A, it moves to a position directly under the pressure plate. This design reduces the difficulty of manually placing pallets and saves manpower.

[0033] The front-to-back spacing of the small end of the funnel-shaped channel formed by guide plate A matches the front-to-back length of the pallet; the height of guide plate A is such that it does not obstruct limit strip A and limit strip B, and can still guide the pallet.

[0034] Preferably, it also includes guide component B and feeding conveyor belt;

[0035] The feeding conveyor belt is located on the right side of the guide assembly A, behind the belt conveyor, and perpendicular to the conveying direction of the belt conveyor.

[0036] The guiding component B is installed on the feeding conveyor belt; the guiding component B includes two guide plates B, which are symmetrically arranged to form a funnel-shaped channel with a smaller front end and a larger rear end.

[0037] The guide component B and the feeding conveyor belt further facilitate the placement of pallets, further reduce the difficulty of manual operation, and save manpower.

[0038] Components not specified in this utility model are all made using conventional methods in the field. Those skilled in the art can select their models and installation methods according to actual usage needs, and clearly understand how to install and control them. They will not be described in detail here.

[0039] This utility model achieves the following beneficial effects:

[0040] This invention has a simple structure and is easy to operate. It can be used to test the sealing airtightness and metallic impurities of powder products. Powder products with leaking seals can be recovered in a timely manner after testing. The support platform can provide stable support during the sealing test, making the entire testing process more stable. Attached Figure Description

[0041] Figure 1 This is a front view of Embodiment 1 of the present utility model;

[0042] Figure 2 for Figure 1 Top view;

[0043] Figure 3 This is a front view of Embodiment 2 of the present invention;

[0044] Figure 4 for Figure 3 Top view.

[0045] In the diagram: 1. Belt conveyor; 2. Metal detector; 3. First cylinder; 4. Pallet; 5. Pressure plate; 6. Feeding conveyor belt; 7. Feeding cylinder; 8. Push plate; 9. Support frame; 10. Upper conveyor belt; 11. Tabletop; 12. Support leg; 13. Lower conveyor belt; 14. Omnidirectional ball; 15. Infrared receiver; 16. Infrared transmitter; 17. Powder product; 18. Limiting strip A; 19. Limiting strip B; 20. Feeding conveyor belt; 21. Guide plate A; 22. Guide plate B. Detailed Implementation

[0046] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0047] Example 1

[0048] like Figure 1 , Figure 2 As shown, an online metal impurity and sealing airtightness detection device for powder products includes a belt conveyor 1, a metal detector 2, and a first cylinder 3; it also includes a support platform, a tray 4, a pressure plate 5, a feeding conveyor belt 6, a feeding cylinder 7, and a push plate 8.

[0049] The first cylinder is positioned directly above the belt conveyor via a support frame 9; the movable end of the first cylinder is located below, and a pressure plate is detachably and fixedly mounted on the movable end of the first cylinder; the vertical downward projection of the pressure plate falls on the upper surface of the upper conveyor belt 10 of the belt conveyor.

[0050] The support platform includes a rectangular platform 11 and support legs 12 supporting the platform; the platform is located between the upper and lower conveyor belts 13 of the belt conveyor directly below the pressure plate.

[0051] The pressure plate has a hollow structure, and the metal detector is installed inside the pressure plate;

[0052] The pallet is placed on the upper conveyor belt. When the upper conveyor belt carries the pallet to directly below the pressure plate, the vertical downward projection of the pressure plate falls into the pallet.

[0053] The upper surface of the platform is covered with a matrix of omnidirectional balls 14.

[0054] The universal ball is made of nylon; the bottom size of the tray matches the pressure plate; the conveyor belt of the belt conveyor is made of high-hardness nylon.

[0055] The feeding cylinder is located on the left side of the support platform and on the upper part of the rear side of the belt conveyor. The movable end of the feeding cylinder moves back and forth in the horizontal direction. A push plate is fixedly installed on the movable end of the feeding cylinder. The feeding conveyor belt is located on the left side of the support platform and on the front side of the belt conveyor, and is perpendicular to the conveying direction of the belt conveyor.

[0056] The position of the push plate corresponds to the position of the feeding conveyor.

[0057] Infrared receivers 15 and infrared transmitters 16 are symmetrically arranged on the belt conveyor on the right side of the support platform.

[0058] The support platform and pressure plate are both made of non-metallic materials; the pressure plate includes a hollow cuboid with an open lower end and a cover that can be detached from the lower end of the hollow cuboid.

[0059] In this embodiment, the powder product to be tested is placed on a tray. Multiple trays are arranged at equal intervals on the upper conveyor belt. The tray is transported by the belt conveyor to a position directly below the pressure plate. Then, a cylinder drives the pressure plate downwards, compressing the powder product 17 for sealing and airtightness testing. A metal detector in the pressure plate also detects the presence of metal impurities. If the powder product in the tray leaks, the leaking powder is clearly visible. Since this embodiment operates in a stop-and-go mode, when the tray moves to the front of the push plate, the push plate can be controlled to move the tray containing the leaking powder product onto the unloading conveyor belt, thus conveying the defective powder product for recycling. If there is no leakage, the push plate is not used, and the tray continues to be transported along the belt conveyor.

[0060] The metal detector in this embodiment uses existing technology and can be connected to a buzzer alarm. When the metal detector detects the presence of metal impurities, it can also send the signal to the controller of the device to stop the operation of the entire device, or it can be stopped manually after hearing the alarm.

[0061] Example 2

[0062] like Figure 3 , Figure 4 As shown, this embodiment, based on embodiment 1, also includes limiting strip A18, limiting strip B19, guide component A, guide component B, and feeding conveyor belt 20;

[0063] Limiting strips A and B are detachably and fixedly installed on the upper end face of the upper conveyor belt. Limiting strips A and B are parallel to each other and perpendicular to the conveying direction of the belt conveyor. The spacing between limiting strips A and B matches the left and right lengths of the pallet.

[0064] The guide assembly A is installed on the belt conveyor on the right side of the support platform; the guide assembly A includes two guide plates A21, which are symmetrically arranged front and back to form a funnel-shaped channel that is smaller on the left and larger on the right.

[0065] The front-to-back spacing of the small end of the funnel-shaped channel formed by guide plate A matches the front-to-back length of the pallet; the height of guide plate A is such that it does not obstruct limit strip A and limit strip B, but can still guide the pallet.

[0066] The feeding conveyor belt is located on the right side of the guide assembly A, behind the belt conveyor, and perpendicular to the conveying direction of the belt conveyor.

[0067] The guide component B is installed on the feeding conveyor belt; the guide component B includes two guide plates B22, which are symmetrically arranged to form a funnel-shaped channel with a small front end and a large rear end.

[0068] The left and right spacing of the small end of the funnel-shaped channel formed by guide plate B matches the left and right length of the tray.

[0069] Since this embodiment operates in a stop-and-go mode, when the pallet under the pressure plate stops to prepare for inspection, the feeding conveyor belt can take advantage of this stop time to guide the pallet through the guide assembly B and transport the pallet between the set of limit bars A and B of the belt conveyor. Subsequently, the belt conveyor carries the pallet into the guide assembly A for guidance adjustment, so that the pallet's position is aligned with the pressure plate when it moves under the pressure plate.

[0070] The technical solution of this utility model is not limited to the specific embodiments described above. All technical modifications made based on the technical solution of this utility model shall fall within the protection scope of this utility model.

Claims

1. An online detection device for metal impurities and sealing airtightness of powder products, comprising a belt conveyor, a metal detector, and a first cylinder; characterized in that: It also includes a support platform, a tray, and a pressure plate; The first cylinder is mounted directly above the belt conveyor via a support frame; the movable end of the first cylinder is located below, and a pressure plate is detachably and fixedly mounted on the movable end of the first cylinder; the vertical downward projection of the pressure plate falls on the upper surface of the upper conveyor belt of the belt conveyor. The support platform includes a rectangular platform and supporting legs; the platform is located between the upper and lower conveyor belts of the belt conveyor directly below the pressure plate. The pressure plate has a hollow structure, and the metal detector is installed inside the pressure plate; The pallet is placed on the upper conveyor belt. When the upper conveyor belt carries the pallet to directly below the pressure plate, the vertical downward projection of the pressure plate falls into the pallet.

2. The online metal impurity and sealing airtightness detection device for powder products according to claim 1, characterized in that: The upper surface of the platform is evenly distributed with multiple omnidirectional balls.

3. The online metal impurity and sealing airtightness detection device for powder products according to claim 1, characterized in that: It also includes a feeding conveyor belt, a feeding cylinder, and a push plate; The feeding cylinder is located on the left side of the support platform and on the upper part of the rear side of the belt conveyor. The movable end of the feeding cylinder moves back and forth in the horizontal direction. A push plate is fixedly installed on the movable end of the feeding cylinder. The feeding conveyor belt is located on the left side of the support platform and on the front side of the belt conveyor, and is perpendicular to the conveying direction of the belt conveyor. The position of the push plate corresponds to the position of the feeding conveyor.

4. The online metal impurity and sealing airtightness detection device for powder products according to claim 1, characterized in that: It also includes limit strip A and limit strip B; Limiting strips A and B are detachably and fixedly installed on the upper end face of the upper conveyor belt. Limiting strips A and B are parallel to each other and perpendicular to the conveying direction of the belt conveyor. The spacing between limiting strips A and B matches the left and right lengths of the pallet.

5. The online metal impurity and sealing airtightness detection device for powder products according to claim 4, characterized in that: It also includes guide component A; The guide component A is installed on the belt conveyor on the right side of the support platform; the guide component A includes two guide plates A, which are symmetrically arranged front and back to form a funnel-shaped channel that is smaller on the left and larger on the right.

6. The online metal impurity and sealing airtightness detection device for powder products according to claim 5, characterized in that: It also includes guide component B and feeding conveyor belt; The feeding conveyor belt is located on the right side of the guide assembly A, behind the belt conveyor, and perpendicular to the conveying direction of the belt conveyor. The guiding component B is installed on the feeding conveyor belt; the guiding component B includes two guide plates B, which are symmetrically arranged to form a funnel-shaped channel with a smaller front end and a larger rear end.

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