Protective device for weighing sensor of electronic belt scale

Abstract

The utility model relates to a protective device for a weighing sensor of an electronic belt scale, the weighing sensor comprises a fixed supporting seat, a suspension weighing piece and a calibration screw, the suspension weighing piece is connected on the fixed supporting seat, the calibration screw is screwed on the suspension weighing piece, the protective device comprises a protective cover and a limiting mechanism, and the limiting mechanism is fixed on the fixed supporting seat. The protective cover comprises a left hollowed-out protective face, a front hollowed-out protective face, a right hollowed-out protective face and a closed top face, and the left hollowed-out protective face, the front hollowed-out protective face and the right hollowed-out protective face are connected to the left side edge, the front side edge and the right side edge of the closed top face respectively. A plurality of through holes are formed in the left hollowed-out protective surface, the front hollowed-out protective surface and the right hollowed-out protective surface; the protective cover fixedly covers the weighing sensor, so that the weighing sensor is positioned in the protective cover, and the closed top surface is positioned on the upper side of the weighing sensor; the limiting mechanism comprises a limiting rod and a locking structure, the limiting rod is arranged on the fixed supporting seat and located on the lower side of the suspension weighing piece, the limiting rod can move up and down relative to the fixed supporting seat, and the locking structure can lock and fix the limiting rod on the fixed supporting seat.

Description

Technical Field

[0001] The utility model relates to the technical application field of tobacco tools, in particular to a protective device for a weighing sensor of an electronic belt scale. Background Art

[0002] Electronic belt scales are crucial measuring equipment in tobacco industry silk-making workshops, typically used for continuous weighing and testing of tobacco on belts. Any issues with control accuracy can directly impact the quality of tobacco production processes and even cause serious quality incidents. Traditional electronic belt scales collect load signals via load cells and speed signals via encoders, then output cumulative weight and instantaneous flow rates through integration. The load cell converts the force of gravity on a suspended weighing element into an electrical signal. The greater the gravity, the greater the downward deformation of the suspended weighing element. The maximum allowable downward displacement is called the maximum deformation distance. Beyond the maximum deformation distance, the suspended weighing element cannot fully reset.

[0003] During the operation, maintenance and servicing of electronic belt scales, since the weighing sensor is exposed to the external environment, it is very easy to accumulate a large amount of dust and impurities, and the weighing sensor will inevitably be subjected to direct impact, causing deformation damage, or indirect impact, causing overload damage. For example, 1. When the electronic belt scale is in operation, the weighing sensor is impacted by the reaction force from above the suspended weighing piece; 2. When the electronic belt scale is maintained, people step on the weighing area, causing the weighing sensor to be impacted; 3. Workers accidentally touch the weighing sensor when clearing smoke, installing side panels, and using maintenance tools, causing damage; 4. When maintaining the electronic belt scale, calibration screws are usually used for measurement calibration and flow testing, but due to the long length of the calibration screws, they are very easy to be accidentally touched, causing damage to the weighing sensor; 5. When the weighing sensor exceeds the maximum deformation distance, it causes zero drift or overload damage.

[0004] At present, in order to solve the problems encountered by traditional electronic belt scales, studies have been conducted on setting up protective devices on weighing sensors. For example, the utility model with the publication (announcement) number CN215984827U discloses a protective device for a closed belt scale weighing sensor, wherein the protective device is a closed structure made of anti-static material, and has functions such as anti-splash and anti-impact; the utility model with the publication (announcement) number CN211696650U discloses a protective cover for a belt scale weighing sensor, wherein the protective cover is a closed structure, and has the function of shielding and protecting; although the above utility models have played a certain protective role for the belt scale weighing sensor, there is no improvement on the zero drift or overload damage caused by the belt scale weighing sensor exceeding the maximum deformation distance. Utility Model Content

[0005] In view of the defects of the prior art mentioned above, the technical problem to be solved by the present invention is to provide a protective device for the weighing sensor of an electronic belt scale, which can prevent the weighing sensor of the electronic belt scale from being impacted and accidentally touched by hard objects. At the same time, when the gravity of the weighing sensor of the electronic belt scale is overloaded, it can also play the function of overload protection, thereby preventing the weighing sensor from zero drift or overload damage.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a protective device for an electronic belt scale weighing sensor, wherein the weighing sensor includes a fixed support seat, a suspended weighing piece and a calibration screw, wherein the suspended weighing piece is connected to the fixed support seat, and the calibration screw is screwed on the suspended weighing piece. The protective device includes a protective cover and a limiting mechanism, wherein the protective cover includes a left hollow protective surface, a front hollow protective surface, a right hollow protective surface and a closed top surface, wherein the left hollow protective surface, the front hollow protective surface and the right hollow protective surface are respectively connected to the left side of the closed top surface. The left hollow protective surface, the front hollow protective surface and the right hollow protective surface are all provided with a plurality of through holes on the side, front side and right side; the protective cover is fixedly mounted on the weighing sensor, so that the weighing sensor is located inside the protective cover, and the closed top surface is located on the upper side of the weighing sensor; the limiting mechanism includes a limiting rod and a locking structure, the limiting rod is provided on the fixed support seat and is located on the lower side of the suspended weighing piece, and the limiting rod can move up and down relative to the fixed support seat, and the locking structure can lock the limiting rod to the fixed support seat.

[0007] Furthermore, a calibration hole for a calibration screw to pass through is provided on the front hollow protective surface, and the calibration screw can move downward in the calibration hole.

[0008] Furthermore, the distance between the calibration screw and the lower edge of the calibration hole is greater than the maximum deformation distance allowed when the suspended weighing piece moves downward under weighing.

[0009] Furthermore, the diameter of the through hole is 5 mm.

[0010] Furthermore, the protective cover is made of steel.

[0011] Furthermore, the left hollow protective surface, the front hollow protective surface, the right hollow protective surface and the closed top surface are all rectangular in shape.

[0012] As described above, the protective device for the electronic belt scale weighing sensor involved in the present invention has the following beneficial effects:

[0013] 1. By setting up a protective cover, the electronic belt scale weighing sensor can be protected from impact and accidental contact with hard objects, and it is convenient for air to enter, easy to clean, and can prevent dust accumulation.

[0014] 2. By setting a limit mechanism, when the electronic belt scale is in daily use, it can prevent the weighing sensor from being impacted and causing zero drift or overload damage when it is overloaded. When the electronic belt scale is under maintenance, it can prevent the weighing sensor from being damaged by impact.

[0015] 3. By setting the calibration hole, when the electronic belt scale weighing sensor uses the calibration screw for measurement calibration and flow test, the calibration screw can pass through the calibration hole and be screwed onto the suspended weighing piece. There is no need to remove the protective cover, and the hanging weight calibration can be performed directly, thereby improving the calibration efficiency and test efficiency of the electronic belt scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the protective cover and the limiting mechanism in the utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the electronic belt scale weighing sensor in the utility model.

[0018] Explanation of Figure Numbers

[0019] 1. Protective cover 1, 11. Left hollow protective surface, 12. Front hollow protective surface, 121. Calibration hole, 13. Right hollow protective surface, 14. Closed top surface, 15. Through hole, 2. Limiting mechanism, 3. Fixed support seat, 4. Connecting piece, 5. Suspended weighing piece, 6. Calibration screw. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the present invention.

[0021] In the description of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0023] In addition, in the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0024] See also Figures 1 to 2 The utility model provides a protective device for an electronic belt scale weighing sensor. The weighing sensor includes a fixed support seat 3, a connecting piece 4, a suspended weighing piece 5 and a calibration screw 6. The suspended weighing piece 5 is connected to the fixed support seat 3 through the connecting piece 4. The calibration screw 6 is screwed on the suspended weighing piece 5. The protective device includes a protective cover 1 and a limiting mechanism 2. The protective cover 1 includes a left hollow protective surface 11, a front hollow protective surface 12, a right hollow protective surface 13 and a closed top surface 14. The left hollow protective surface 11, the front hollow protective surface 12 and the right hollow protective surface 13 are respectively connected to the left side, front side and right side of the closed top surface 14. The left hollow protective surface 11, the front hollow protective surface 12 and the right hollow protective surface 13 are respectively connected to the left side, front side and right side of the closed top surface 14. A plurality of through holes 15 are provided on the hollow protective surface 11, the front hollow protective surface 12 and the right hollow protective surface 13. Preferably, a lead hole is provided on the right hollow protective surface 13 to facilitate the passage of the lead wires on the weighing sensor of the electronic belt scale; the protective cover 1 is fixedly mounted on the weighing sensor, so that the weighing sensor is located inside the protective cover 1, and the closed top surface 14 is located on the upper side of the weighing sensor; the limiting mechanism 2 includes a limiting rod and a locking structure, the limiting rod is provided on the fixed support seat 3 and is located on the lower side of the suspended weighing member 5, and the limiting rod can move up and down relative to the fixed support seat 3, and the locking structure can lock the limiting rod on the fixed support seat 3.

[0025] The basic working principle of the protective device of the electronic belt scale weighing sensor involved in the utility model is: by setting the protective cover 1, the electronic belt scale weighing sensor can be prevented from being impacted and accidentally touched by hard objects, and the protective cover 1 meets the insect-proof and dust-proof standards of the tobacco processing technology, and can conveniently complete cleaning, insect-proofing and daily maintenance. Among them, the closed top surface 14 can prevent dust and impurities from falling into the weighing sensor, and prevent foreign objects from falling and damaging the weighing sensor. The left hollow protective surface 11, the front hollow protection and the right hollow protective surface 13 can effectively protect the electronic belt scale weighing sensor from being accidentally touched by hard objects. The through hole 15 can facilitate the entry of compressed air, which is convenient for cleaning. At the same time, the bottom of the protective cover 1 is an open structure, and no protective surface is set. The structure is simple and easy to make, and it can facilitate dust and impurities to flow out of the protective cover 1. out to prevent dust accumulation; by setting the limit mechanism 2, when the electronic belt scale is in daily use, the distance between the limit rod and the bottom of the suspended weighing piece 5 is adjusted to the maximum deformation distance of the weighing sensor, and the limit rod is locked and fixed to the fixed support seat 3 through the locking structure. When the weighing sensor exceeds the maximum deformation distance, the distance between the limit rod and the bottom of the suspended weighing piece 5 is reduced. The limit rod can support the suspended weighing piece 5 and provide support protection to avoid the weighing sensor from being impacted and causing zero drift or overload damage when overloaded. When the electronic belt scale is under maintenance, the distance between the limit rod and the bottom of the suspended weighing piece 5 is adjusted, and the limit rod is locked and fixed to the fixed support seat 3 through the locking structure, so that the limit rod supports the suspended weighing piece 5, which can prevent the weighing sensor from being damaged by external impact.

[0026] See also Figures 1 to 2 The present invention is further described below with a specific embodiment:

[0027] In this embodiment, see Figure 1 As a preferred design, a calibration hole 121 for the calibration screw 6 to pass through is provided on the front hollow protective surface 12. When the electronic belt scale weighing sensor uses the calibration screw 6 for metrological calibration and flow testing, the calibration screw 6 can pass through the calibration hole and be screwed on the suspended weighing piece 5 without removing the protective cover 1. The hanging weight calibration can be performed directly, which is convenient for the electronic belt scale weighing sensor to perform metrological calibration and flow testing. On the one hand, it can improve the calibration efficiency and test efficiency of the electronic belt scale. On the other hand, the calibration screw 6 is installed on the suspended weighing piece 5 for a long time and the calibration screw 6 is relatively prominent. It is very easy to cause accidental collision in daily use, resulting in damage to the electronic belt scale weighing sensor. The setting of the calibration hole 121 makes it convenient for the calibration screw 6 to be installed and removed after use, avoiding damage to the calibration screw 6 due to accidental collision; the calibration screw 6 can move downward in the calibration hole 121. When performing hanging weight calibration, the calibration screw 6 is allowed to move downward due to the weight of the hanging weight, thereby improving the calibration effect and test effect of the electronic belt scale.

[0028] In this embodiment, see Figure 1 As a preferred design, when the suspended weighing member 5 moves downward for weighing, the calibration screw 6 moves along with the suspended weighing member 5, and the distance between the calibration screw 6 and the lower edge of the calibration hole 121 is set to be greater than the maximum deformation distance allowed when the suspended weighing member 5 moves downward for weighing. When the weighing sensor exceeds the maximum deformation distance, the calibration screw 6 can be prevented from colliding.

[0029] In this embodiment, see Figure 1 As a preferred design, the diameter of the through hole 15 is 5 mm, which is smaller than the diameter of a traditional steel pipe or nozzle used to blow away dust. When the staff blows away dust and impurities, the through hole 15 can prevent objects such as steel pipes or nozzles from entering.

[0030] In this embodiment, see Figure 1 As a preferred design, the material of the protective cover 1 is steel, which has the advantages of high strength, light weight and easy processing. It can withstand a large load and improve the durability of the protective cover 1.

[0031] In this embodiment, see Figure 1 As a preferred design, the left hollow protective surface 11, the front hollow protective surface 12, the right hollow protective surface 13 and the closed top surface 14 are all rectangular in shape, with a simple structural arrangement and easy processing.

[0032] As can be seen from the above, the protective device of the electronic belt scale weighing sensor of the present invention has the following beneficial effects:

[0033] 1. By setting up the protective cover 1, the electronic belt scale weighing sensor can be protected from impact and accidental contact with hard objects, and is convenient for air to enter, easy to clean, and can prevent dust accumulation.

[0034] 2. By setting the limit mechanism 2, when the electronic belt scale is in daily use, it can prevent the weighing sensor from being impacted and causing zero drift or overload damage when it is overloaded. When the electronic belt scale is under maintenance, it can prevent the weighing sensor from being impacted and causing damage.

[0035] 3. By setting the calibration hole 121, when the electronic belt scale weighing sensor uses the calibration screw 6 for measurement calibration and flow testing, the calibration screw 6 can pass through the calibration hole 121 and be screwed onto the suspended weighing piece 5. There is no need to remove the protective cover 1, and the hanging weight calibration can be performed directly, thereby improving the calibration efficiency and testing efficiency of the electronic belt scale.

[0036] In summary, the present invention effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A protective device for a weighing sensor of an electronic belt scale, wherein the weighing sensor comprises a fixed support base (3), a suspended weighing member (5) and a calibration screw (6), wherein the suspended weighing member (5) is connected to the fixed support base (3), and the calibration screw (6) is screwed onto the suspended weighing member (5), characterized in that: The protective device comprises a protective cover (1) and a limiting mechanism (2); the protective cover (1) comprises a left hollow protective surface (11), a front hollow protective surface (12), a right hollow protective surface (13) and a closed top surface (14); the left hollow protective surface (11), the front hollow protective surface (12) and the right hollow protective surface (13) are respectively connected to the left side, the front side and the right side of the closed top surface (14); the left hollow protective surface (11), the front hollow protective surface (12) and the right hollow protective surface (13) are respectively connected to the left side, the front side and the right side of the closed top surface (14); A plurality of through holes (15) are provided; the protective cover (1) is fixedly mounted on the weighing sensor, so that the weighing sensor is located inside the protective cover (1), and the closed top surface (14) is located on the upper side of the weighing sensor; the limiting mechanism (2) includes a limiting rod and a locking structure, the limiting rod is provided on the fixed support seat (3) and is located on the lower side of the suspended weighing member (5), and the limiting rod can move up and down relative to the fixed support seat (3), and the locking structure can lock the limiting rod to the fixed support seat (3).

2. The protective device for the electronic belt scale weighing sensor according to claim 1, characterized in that: The front hollow protective surface (12) is provided with a calibration hole (121) for the calibration screw (6) to pass through, and the calibration screw (6) can move downward in the calibration hole (121).

3. The protective device for the electronic belt scale weighing sensor according to claim 2, characterized in that: The distance between the calibration screw (6) and the lower edge of the calibration hole (121) is greater than the maximum deformation distance allowed when the suspended weighing piece (5) moves downward under weighing.

4. The protective device for the electronic belt scale weighing sensor according to claim 1, characterized in that: The diameter of the through hole (15) is 5 mm.

5. The protective device for the electronic belt scale weighing sensor according to claim 1, characterized in that: The material of the protective cover (1) is steel.

6. The protective device for the electronic belt scale weighing sensor according to claim 1, characterized in that: The left hollow protective surface (11), the front hollow protective surface (12), the right hollow protective surface (13) and the closed top surface (14) are all rectangular in shape.

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