Tobacco stem weighing device with self-cleaning function

Abstract

The utility model discloses a tobacco stem weighing device with a self-cleaning function, which relates to the field of machinery and comprises a weighing tray, a water spraying device, a tray positioning fulcrum, a weighing sensor and a tray supporting device. The weighing tray is mounted on the supporting cabinet; one end of the tray positioning fulcrum is fixedly mounted at the bottom of the weighing tray, and the other end of the tray positioning fulcrum is pressed on the weighing sensor in a contactable manner; one end of the tray supporting device is fixed on the supporting cabinet, and the other end of the tray supporting device can be in contact with the weighing tray and jack up the weighing tray, so that the weighing tray turns laterally; the water spraying device is arranged on the supporting cabinet, and a nozzle of the water spraying device can be arranged above the weighing tray and can spray water to the weighing tray for cleaning. Metered tobacco stems are directly poured into the detection material receiving funnel on the lower portion, the weighing tray is automatically washed, the tobacco stems adhering to the weighing tray are washed away, then the weighing tray is reset, and the device is waterproof, resistant to corrosion, simple in control logic, stable and reliable in operation and capable of meeting the working requirements of the industrial production environment.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, and more specifically, to a tobacco stem weighing device with a self-cleaning function. Background Art

[0002] Currently, during the research on the on-line detection of the cleanliness of washed tobacco stems in cigarette production enterprises, to achieve the on-line detection of sampled tobacco stems, it is necessary to accurately measure the sampled tobacco stems and then add cleaning liquid according to the weighing ratio to ensure that the turbidity of the detection is directly proportional to the cleanliness of the tobacco stems.

[0003] Therefore, it is necessary to develop a weighing mechanism that can accurately weigh and has mechanical actions of tipping and cleaning functions. A tobacco stem weighing device with a flipping and tipping and self-cleaning function can not only achieve accurate measurement of tobacco stems, but also complete the tipping of tobacco stems and the cleaning of the tray. During the whole movement process, it will not affect the weighing accuracy of the weighing mechanism. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a tobacco stem weighing device with a self-cleaning function.

[0005] According to the first aspect of the utility model, there is provided a tobacco stem weighing device with a self-cleaning function, including a weighing tray, a water spraying device, a tray positioning fulcrum, a weighing sensor, and a tray supporting device;

[0006] The weighing tray is installed on the support cabinet;

[0007] One end of the tray positioning fulcrum is fixedly installed at the bottom of the weighing tray, and the other end can be in contact with and press on the weighing sensor;

[0008] One end of the tray supporting device is fixed on the support cabinet, and the other end can be in contact with the weighing tray and jack it up to make it turn over;

[0009] The water spraying device is arranged on the support cabinet, and the nozzle of the water spraying device can be arranged above the weighing tray to spray water for cleaning the weighing tray.

[0010] Optionally, the weighing sensor includes a weighing sensor thimble, the weighing sensor thimble is a cylinder with a diameter of 10 mm and has a sharp tip with a sharpness of 30 degrees;

[0011] The tray positioning fulcrum is a cylinder, and an inward concave conical pit with a slope of 40 degrees is arranged at the upper end of the cylinder;

[0012] The tip is arranged corresponding to the inward concave conical pit.

[0013] Optionally, the water spraying device includes a nozzle mounting bracket and a tray cleaning water pipe. The nozzle mounting bracket is mounted on the support cabinet, the tray cleaning water pipe is mounted on the nozzle mounting bracket, and the nozzle is mounted at the end of the water pipe;

[0014] The nozzle is a pressure-rotating orifice nozzle, and the water pressure is not less than 0.3 MPa.

[0015] Optionally, the tray support device includes a pneumatic push rod, a rotating shaft, and a pneumatic push rod fixing bracket; one end of the pneumatic push rod is used to support the weighing tray, and the other end is connected to the pneumatic push rod fixing bracket through the rotating shaft. The pneumatic push rod fixing bracket is fixed on the support cabinet.

[0016] Optionally, the tray support device further includes an arc-shaped push rod positioning mechanism.

[0017] The arc-shaped push rod positioning mechanism is a cylinder. One end is fixedly installed at the bottom of the weighing tray, and the other end is provided with a semi-circular arc-shaped groove. The spherical pneumatic push rod head 10 at the end of the pneumatic push rod can fit into the semi-circular arc-shaped groove.

[0018] Optionally, when the weighing tray is in a flat state, there is a gap of 3-8 mm between the spherical pneumatic push rod head and the arc-shaped push rod positioning mechanism.

[0019] Optionally, when the weighing tray is in a flat state, a pneumatic push rod positioning magnet is provided on the support cabinet plane near the pneumatic push rod to magnetically attract the pneumatic push rod to return to its position.

[0020] Optionally, the device further includes a tray locking and positioning mechanism and a locking and positioning mechanism fixing part.

[0021] The tray locking and positioning mechanism includes a first pipe, a second pipe, and a third pipe. The second pipe is a horizontal pipe, which is vertically arranged between the first pipe and the third pipe. The first pipe and the second pipe are arranged in parallel and one end of each is arranged at the bottom of the weighing tray;

[0022] The locking and positioning mechanism fixing part is a steel plate and is provided with an arc-shaped groove as a limit hook. The second pipe can move within the limit hook.

[0023] According to the technical content disclosed by the present utility model, the following beneficial effects are achieved:

[0024] In this application, a tobacco stem weighing device with a self-cleaning function is installed above an on-line detection device to accurately measure the sampled tobacco stems grabbed by a robotic arm, and the measured tobacco stems are directly poured into the lower detection receiving funnel. The weighing tray is automatically rinsed to wash away the tobacco stems adhering to the weighing tray, and then the weighing tray is returned to its original position to complete the weighing of the sampled tobacco stems. This device has a reasonable structure, is waterproof and corrosion-resistant, has a simple control logic, operates stably and reliably, and meets the working requirements of the industrial production environment.

[0025] Other features and advantages of the present utility model will become clear from the following detailed description of the exemplary embodiments of the present utility model with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings incorporated in and forming a part of this specification illustrate embodiments of the present utility model and, together with the description, serve to explain the principles of the present utility model.

[0027] Figure 1 The front view of a tobacco stem weighing device with a self-cleaning function in a horizontal state according to an embodiment;

[0028] Figure 2 The front view of a tobacco stem weighing device with a self-cleaning function in a cleaning state according to an embodiment;

[0029] Figure 3 The top view of a tobacco stem weighing device with a self-cleaning function in a horizontal state according to an embodiment;

[0030] Figure 4 The overall schematic diagram of a tobacco stem weighing device with a self-cleaning function according to an embodiment;

[0031] Figure 5 The schematic diagram of a tray locking and positioning mechanism in a tobacco stem weighing device with a self-cleaning function according to an embodiment.

[0032] DESCRIPTION OF THE REFERENCE NUMERALS

[0033] 1. weighing tray; 2. nozzle; 3. nozzle mounting bracket; 4. tray positioning fulcrum; 5. weighing sensor; 6. weighing sensor thimble; 7. tray locking and positioning mechanism; 8. locking and positioning mechanism fixing part; 9. arc surface push rod positioning mechanism; 10. spherical pneumatic push rod head; 11. pneumatic push rod; 12. rotating shaft; 13. pneumatic push rod fixing bracket; 14. tray cleaning water pipe; 15. blanking port; 16. receiving funnel; 17. pneumatic push rod positioning magnet; 18. tobacco stem placement area; 19. cabinet opening in the area where the pneumatic push rod passes through; 20. robotic arm; 21. support cabinet; 22. first pipe; 23. second pipe; 24. third pipe. DETAILED DESCRIPTION

[0034] Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present utility model.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present utility model or its application or use.

[0036] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be regarded as part of the specification.

[0037] In all examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of exemplary embodiments may have different values.

[0038] It should be noted that: Like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, further discussion thereof is not required in subsequent drawings.

[0039] At present, for the on-line monitoring of the cleanliness of tobacco stems after cleaning in cigarette enterprises, the cleanliness of the tobacco stems after cleaning cannot be directly detected on-line through sensor probes, machine vision, etc. It can only be reflected by detecting the turbidity of the cleaning liquid through the secondary cleaning method. For the detection cleaning of tobacco stems, accurate weighing of the samples is required. A tobacco stem weighing device with functions of flipping and dumping and self-cleaning can complete multiple links of weighing, dumping, and cleaning of tobacco stems without affecting the weighing accuracy of the weighing mechanism during the operation process.

[0040] The present utility model provides a tobacco stem weighing device with a self-cleaning function, as Figure 1 and Figure 2 shown, which includes a weighing tray 1, a water spraying device, a tray positioning fulcrum 4, a weighing sensor 5, and a tray support device; the weighing tray 1 is installed on the support cabinet 21; one end of the tray positioning fulcrum 4 is fixedly installed at the bottom of the weighing tray 1, and the other end can be in contact with and press on the weighing sensor 5; one end of the tray support device is fixed on the support cabinet, and the other end can be in contact with the weighing tray and lift it to make it turn over;

[0041] The water spraying device is arranged on the support cabinet 21, and the nozzle 2 of the water spraying device can be arranged above the weighing tray 1 to spray water for cleaning the weighing tray 1.

[0042] Among them, the weighing tray 1 can be made of 304 stainless steel with a thickness of 1 mm, a length of 350 mm, a width of 300 mm, a guardrail height of 40 mm, surrounded by the guardrail on three sides, and there is no guardrail on one side of the blanking port 15;

[0043] The nozzle 2 is installed on the nozzle mounting bracket 3. The nozzle mounting bracket 3 is a stainless steel column. The nozzle is a 3-hole nozzle with pressure rotation and can complete the cleaning operation under the condition that the water pressure is not less than 0.3 MPa;

[0044] In some specific embodiments, the weighing sensor 5 includes a weighing sensor thimble 6. The weighing sensor thimble 6 is a cylinder with a diameter of 10 mm and has a sharp tip with a sharpness of 30 degrees;

[0045] The tray positioning fulcrum 4 is a cylinder, and there is an inward concave conical pit with a slope of 40 at the upper end of the cylinder; the tip is arranged corresponding to the inward concave conical pit;

[0046] Specifically, the tray positioning fulcrum 4 is made of a stainless steel column with a diameter of 20 mm and a length of 20 mm. An inward concave circular pit with a slope of 40 degrees is machined inside. The weighing sensor 5 is fixed on the detection equipment panel with screws. On three sides of the weighing sensor 5, a weighing sensor thimble 6 with a sharpness of 30 degrees and a diameter of 10 mm is installed corresponding to the position of the tray positioning fulcrum 4. The weighing sensor thimble 6 is a stainless steel thimble.

[0047] The water spraying device includes a nozzle mounting bracket 3 and a tray cleaning water pipe 14. The nozzle mounting bracket 3 is installed on the support cabinet 21. The tray cleaning water pipe 14 is installed on the nozzle mounting bracket 3. The nozzle is installed at the end of the water pipe;

[0048] The nozzle 2 is a hole nozzle with pressure rotation, and the water pressure is not less than 0.3 MPa.

[0049] The tray support device includes a pneumatic push rod 11, a rotating shaft 12 and a pneumatic push rod fixing bracket 13; one end of the pneumatic push rod 11 is used to support the weighing tray 1, and the other end is connected to the pneumatic push rod fixing bracket 13 through the rotating shaft 12. The pneumatic push rod fixing bracket 13 is fixed on the support cabinet 21.

[0050] The tray support device further includes an arc-shaped push rod positioning mechanism 9. The arc-shaped push rod positioning mechanism 9 is a cylinder. One end is fixedly installed at the bottom of the weighing tray 1, and the other end is provided with a semi-circular arc-shaped groove. The spherical pneumatic push rod head 10 at the end of the pneumatic push rod 11 can fit into the semi-circular arc-shaped groove.

[0051] When the weighing tray 1 is in a flat state, there is a gap of 3-8 mm, preferably 5 mm, between the spherical pneumatic push rod head 10 and the arc-shaped push rod positioning mechanism 9.

[0052] When the weighing tray 1 is in a flat state, a pneumatic push rod positioning magnet 17 is provided on the plane of the support cabinet 21 near the pneumatic push rod 11, which is used to magnetically attract the pneumatic push rod 11 to return to its position.

[0053] Specifically, the arc-shaped push rod positioning mechanism 9 is installed at the bottom of the weighing tray 1. The arc-shaped push rod positioning mechanism 9 can be turned from a stainless steel cylinder according to the dimensions in the figure, forming a semi-circular arc-shaped groove, specifically as Figure 1 shown. At the top of the pneumatic push rod 11, a spherical jacking mechanism, namely the spherical pneumatic push rod head 10, is installed. In the state where the tray is flat, since there is a 5-mm gap between the spherical pneumatic push rod head 10 and the semi-circular arc-shaped groove of the arc-shaped push rod positioning mechanism 9, the pneumatic push rod 11 does not affect weighing. In this state, the pneumatic push rod is adsorbed by the pneumatic push rod positioning magnet 17 and positioned directly below the semi-circular arc-shaped groove. The pneumatic push rod fixing bracket 13 and the rotating shaft 12 can rotate in the front-back direction when the pneumatic push rod 11 jacks up. When the pneumatic push rod 11 jacks up, the spherical pneumatic push rod head 10 contacts the semi-circular arc-shaped groove. As the weighing tray 1 jacks up, the weighing sensor thimble 6 and the tray positioning fulcrum 4 under the weighing tray are separated. The front end of the weighing tray 1 drops under the action of gravity. The second tube of the tray locking and positioning mechanism 7 of the weighing tray 1 will drop into the limit hook of the locking and positioning mechanism fixing part 8. As the pneumatic push rod 11 is further pushed up, at this time, the limit hook serves as the tilting rotating shaft of the weighing tray, bearing the weight of the weighing tray 1 and being able to fix the weighing tray 1 so as not to break away. Since the pneumatic push rod 11 tilts forward under the action of the front-section rotating shaft of the weighing tray 1, the pneumatic push rod positioning magnet 17 and the pneumatic push rod 11 are separated; when the tilting action of the weighing tray 1 is in place, the cleaning water control solenoid valve is activated to supply water to the nozzle 2, and the tray cleaning starts. The cleaning is completed in 20 seconds, and the solenoid valve is closed to stop the cleaning; after the cleaning of the weighing tray 1 is completed, the pneumatic push rod 11 retracts. The rear section of the weighing tray 1 drops under the action of gravity. The tray locking and positioning mechanism 7 at the front end of the weighing tray 1 rotates. The pneumatic push rod continues to retract. The tray positioning fulcrum 4 on the weighing tray 1 contacts the weighing sensor thimble 6, and the weighing sensor thimble 6 automatically returns to its position. At the same time, the second tube 23 disengages from the limit hook. At this time, the pneumatic push rod 11 has returned to its position in the horizontal direction, and the pneumatic push rod positioning magnet 17 fixes the pneumatic push rod. The pneumatic push rod 11 retracts another 5 mm, and the spherical pneumatic push rod head 10 is separated from the arc-shaped push rod positioning mechanism 9, completing the return of the weighing tray 1.

[0054] As Figure 3 shown, a tobacco stem placement area 18 is drawn above the support cabinet 21. At the same time, in order to install the pneumatic push rod 11, a cabinet opening 19 for the passage area of the pneumatic push rod is provided on the support cabinet 21 for the reciprocating movement of the pneumatic push rod 11.

[0055] As Figure 1 and2 As shown, at the front bottom of the weighing tray 1, along the material discharge opening 15, 2 tray locking and positioning mechanisms 7 are installed at corresponding positions. As Figure 5 shown, it includes a first pipe 22, a second pipe 23 and a third pipe 24. The second pipe 23 is a horizontal pipe made of a stainless steel round pipe with a diameter of 10 mm and a length of 30 mm. And at both ends, the first pipe 22 and the third pipe 24 are fixed at corresponding positions at the bottom of the weighing tray 1 by 2 stainless steel brackets with a height of 25 mm. The second pipe 23 is perpendicular to the first pipe 22 and the third pipe 24, and the first pipe 22 is parallel to the third pipe 24. The locking and positioning mechanism fixing part 8 is a tray limiting hook, which is laser cut and bent from a stainless steel plate with a thickness of 2 mm. When the weighing tray is lifted, due to the action of gravity, the second pipe 23 in the tray locking and positioning mechanism 7 on the weighing tray 1 will fall into the limiting hook in the locking and positioning mechanism fixing part 8 to complete the tray positioning. As Figure 1 shown, when the weighing tray 1 is placed flat, since the height of the weighing sensor thimble 6 is higher than the positioning hook, the second pipe 23 in the tray locking and positioning mechanism 7 will be disengaged from the limiting hook in the locking and positioning mechanism fixing part 8, without affecting the weighing accuracy.

[0056] In summary, as Figure 4 shown, in this application, the tobacco stem weighing device with a self-cleaning function is installed above the on-line detection device to accurately measure the sampled tobacco stems grabbed by the robotic arm 20, and directly pour the measured tobacco stems into the lower detection receiving funnel 16, and automatically wash the weighing tray to wash off the tobacco stems adhered to the weighing tray, and then return the weighing tray to its original position to complete the weighing work of the entire sampled tobacco stems. This device has a reasonable structure, is waterproof and corrosion-resistant, has a simple control logic, and operates stably and reliably, meeting the working requirements of the industrial production environment.

[0057] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A tobacco stem weighing device with self-cleaning function, characterized in that: include: Support cabinet, weighing tray, water spray device, tray positioning fulcrum, weighing sensor and tray support device; The weighing tray is installed on the supporting cabinet; One end of the tray positioning fulcrum is fixedly mounted on the bottom of the weighing tray, and the other end can be pressed on the weighing sensor; One end of the tray support device is fixed on the support cabinet, and the other end can contact the weighing tray and lift it up to make it turn sideways; The water spray device is arranged on the supporting cabinet, and the nozzle of the water spray device can be arranged above the weighing tray to spray water for cleaning.

2. The tobacco stem weighing device with self-cleaning function according to claim 1, characterized in that: The weighing sensor comprises a weighing sensor ejector pin, which is a cylinder with a diameter of 10 mm and a needle tip with a sharpness of 30 degrees; The pallet positioning fulcrum is a cylinder, and a concave cone pit with a slope of 40 degrees is provided at the upper end of the cylinder; The needle tip is arranged correspondingly to the concave cone pit.

3. The tobacco stem weighing device with self-cleaning function according to claim 2, characterized in that: The water spray device comprises a nozzle mounting bracket and a tray cleaning water pipe, wherein the nozzle mounting bracket is mounted on the support cabinet, the tray cleaning water pipe is mounted on the nozzle mounting bracket, and the nozzle is mounted at the end of the water pipe; The nozzle is a hole nozzle with pressure rotation, and the water pressure is not less than 0.3MPa.

4. The tobacco stem weighing device with self-cleaning function according to claim 3, characterized in that: The tray support device includes a pneumatic push rod, a rotating shaft and a pneumatic push rod fixing bracket; one end of the pneumatic push rod is used to support the weighing tray, and the other end is connected to the pneumatic push rod fixing bracket through the rotating shaft, and the pneumatic push rod fixing bracket is fixed on the support cabinet.

5. The tobacco stem weighing device with self-cleaning function according to claim 4, characterized in that: The tray supporting device also includes a curved push rod positioning mechanism, The arc push rod positioning mechanism is a cylinder, one end of which is fixedly mounted on the bottom of the weighing tray, and the other end is provided with a semicircular arc groove, and the spherical pneumatic push rod head (10) at the end of the pneumatic push rod can be inserted into the semicircular arc groove.

6. The tobacco stem weighing device with self-cleaning function according to claim 5, characterized in that: When the weighing tray is in a flat state, a gap of 3-8 mm is provided between the spherical pneumatic push rod head and the arc push rod positioning mechanism.

7. The tobacco stem weighing device with self-cleaning function according to claim 6, characterized in that: When the weighing tray is in a flat state, a pneumatic push rod positioning magnet is arranged on the plane of the supporting cabinet near the pneumatic push rod, which is used to magnetically attract the pneumatic push rod and return it to its original position.

8. The tobacco stem weighing device with self-cleaning function according to claim 1, characterized in that: The device also includes a tray locking and positioning mechanism and a locking and positioning mechanism fixing member. The tray locking and positioning mechanism comprises a first tube, a second tube and a third tube, wherein the second tube is a horizontal tube and is vertically arranged between the first tube and the third tube, and the first tube and the second tube are arranged in parallel and one end of each of them is arranged at the bottom of the weighing tray; The locking and positioning mechanism fixing piece is a steel plate and is provided with an arc-shaped groove as a limiting hook, and the second tube can move in the limiting hook.

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