Automatic metering scale

Abstract

The utility model relates to the technical field of production equipment, and discloses an automatic metering scale which comprises a metering scale body and a buffer device, the metering scale body comprises a hopper, a supporting frame and a weighing sensor, the hopper is provided with a weighing cavity with an opening in the upper end, the weighing cavity is located in the hopper, and the supporting frame is located outside the weighing cavity and supported on the outer hopper wall of the hopper; the weighing sensor is used for weighing materials in the symmetrical material cavity, and the weighing sensor is located at the joint of the hopper and the supporting frame; the buffering device comprises a support located outside the weighing cavity and a buffering plate located in the weighing cavity, and the buffering plate is installed on the support, is close to the opening and is used for decelerating materials falling into the weighing cavity. The buffer plate is located at the position, close to the opening, in the weighing cavity, the falling materials are directly collided and decelerated, the impact force of the materials is reduced, it is ensured that the materials can slowly fall into the weighing cavity after being effectively decelerated, damage to all parts of the automatic weighing scale caused by huge impact force is avoided, and the service life of the automatic weighing scale is prolonged.

Description

An automatic weighing scale Technical Field

[0001] This application belongs to the technical field of production equipment, and specifically relates to an automatic weighing scale. Background Technology

[0002] Automatic weighing scales are mainly used in mortar production to accurately measure and control the input of various raw materials, so as to ensure the stable quality of mortar products and the efficient and orderly production process. They work in conjunction with other equipment such as storage silos, feeders, and mixers to realize the automation of the entire batching process.

[0003] By connecting to the control system, the automatic weighing scale automatically completes the weighing and dispensing of various raw materials according to the preset formula, reducing manual intervention and improving production efficiency and accuracy.

[0004] However, when using an automatic weighing scale, if mortar raw materials are directly discharged into the hopper of the automatic weighing scale, the rapidly discharged mortar raw materials will violently impact the inner wall of the hopper, which may affect the weighing accuracy of the weight sensor, resulting in errors in the displayed powder weight data. Moreover, excessive impact force can damage the automatic weighing scale and even affect its service life. Summary of the Invention

[0005] In view of at least one of the above-mentioned defects or deficiencies in the prior art, the present invention provides an automatic weighing scale that buffers falling materials and avoids damage to the automatic weighing scale caused by excessive impact force during the feeding process.

[0006] To achieve the above objectives, this utility model provides an automatic weighing scale, which includes:

[0007] The weighing scale body includes a hopper, a support frame, and a weighing sensor. The hopper is provided with a weighing chamber with an opening at the top. The support frame is located outside the weighing chamber and supported by the outer wall of the hopper. The weighing sensor is used to weigh the material in the weighing chamber and is located at the connection between the hopper and the support frame.

[0008] The buffer device includes a bracket located outside the weighing chamber and a buffer plate located inside the weighing chamber. The buffer plate is installed on the bracket and positioned near the opening. The buffer plate is used to decelerate the material falling into the weighing chamber.

[0009] In some embodiments, the buffer plate includes:

[0010] The straight section is provided with a mounting surface that connects to the bracket;

[0011] The buffer section has a connecting end connected to the straight section and a free end located near the inner wall of the hopper. The top of the buffer section has a buffer slope that slopes downwards from the connecting end to the free end.

[0012] In some embodiments, a rotary drive is mounted on the support, and the output end of the rotary drive is connected to the straight part via a connecting rod. The rotary drive is used to drive the buffer plate to rotate in the horizontal plane, so that the material on the buffer slope falls into the weighing chamber under the action of centrifugal force.

[0013] In some embodiments, the buffer portion is a conical plate, the buffer slope covers the upper surface of the conical plate, and the output end of the rotary drive is connected to the center of the straight portion.

[0014] In some embodiments, the width of the buffer plate is smaller than the width of the opening, so that there is a material passage gap between the edge of the buffer plate and the inner wall of the hopper.

[0015] In some embodiments, the hopper includes:

[0016] A transition section, wherein the transition section is cylindrical and the opening is formed at the upper end;

[0017] The guide section is funnel-shaped, and the lower end of the transition section is connected to the upper end of the guide section. The bottom of the guide section has a discharge port.

[0018] The discharge section is vertically arranged and connected to the lower end of the guide section.

[0019] In some embodiments, a discharge valve is provided at the discharge port, which is used to open or close the discharge port.

[0020] In some embodiments, the weighing scale body includes at least two weighing sensors, which are evenly distributed around the circumference of the hopper.

[0021] In some embodiments, the support includes:

[0022] The first connecting section is horizontally positioned above the hopper, and the buffer plate is connected to the first connecting section;

[0023] The second connecting segment is vertically arranged, and the upper ends of the two second connecting segments are respectively connected to the two ends of the first connecting segment;

[0024] The third connecting segment is horizontally arranged, with the lower end of the second connecting segment connected to one end of the third connecting segment, and the other end of the third connecting segment connected to the support frame.

[0025] In some embodiments, the first connecting segment, the second connecting segment, and the third connecting segment are all rods, with the first connecting segment and the second connecting segment smoothly transitioning to each other.

[0026] Through the above technical solution, the load cell is directly installed at the connection between the hopper and the support frame to detect changes in the force on the hopper, avoiding force transmission loss and achieving higher weighing accuracy. The support frame is independently supported on the outer wall of the hopper and works in conjunction with the load cell to ensure the stability of the hopper and reduce interference from external vibrations on the weighing results. The buffer plate is located inside the weighing chamber near the opening, directly colliding and slowing down the falling material, reducing the impact force of the material and protecting the load cell from damage caused by instantaneous overload. The buffer device is integrated with the weighing scale body, without occupying extra space, and is suitable for compact production lines. The installation position and angle of the buffer plate can also be adjusted to adapt to the impact characteristics of different materials, ensuring that the material can be effectively slowed down and fall smoothly into the weighing chamber, avoiding damage to the components of the automatic weighing scale from huge impact forces and extending the service life of the automatic weighing scale.

[0027] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0029] Figure 1 is a structural diagram of an automatic weighing scale according to an embodiment of the present invention;

[0030] Figure 2 is a structural diagram of the weighing scale body in one embodiment of the present invention;

[0031] Figure 3 is a structural diagram of the buffer plate in one embodiment of the present invention;

[0032] Explanation of reference numerals in the attached figures

[0033] Part Name

[0034] 1. Weighing scale body 2. Buffer device

[0035] 11 Hopper 21 Support

[0036] 111 Weighing chamber 21a First connecting section

[0037] 112 Opening 21b Second connecting section

[0038] 113 Transition section 21c Third connecting section

[0039] 114 Guide Section 22 Buffer Plate

[0040] 115 Discharge section 221 Straight section

[0041] 116 Discharge port 222 Buffer section

[0042] 12 Support frame 23 Rotary drive component

[0043] 13 Load cells 24 Linkages Detailed Implementation

[0044] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0045] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0046] As shown in Figures 1 and 2, this utility model provides an automatic weighing scale, including a weighing scale body 1 and a buffer device 2. The weighing scale body 1 includes a hopper 11, a support frame 12, and a weighing sensor 13. The weighing sensor 13 can be a pressure sensor. The hopper 11 is provided with a weighing chamber 111 with an opening 112 at the top. The hopper 11 adopts an inverted conical design, with a circular opening 112 at the top as a feed inlet. The weighing chamber 111 is located inside the hopper 11, and its inner wall is smooth to reduce material adhesion. The support frame 12 is located outside the weighing chamber 111 and is supported by the outer wall of the hopper 11. This makes the weighing scale body 1 compact, space-saving, and suitable for narrow spaces. In the production line, the weighing sensor 13 is used to weigh the material in the symmetrical material chamber 111. The weighing sensor 13 is located at the connection between the hopper 11 and the support frame 12, eliminating the need for additional support components or complex force transmission paths. The buffer device 2 includes a bracket 21 located outside the weighing chamber 111 and a buffer plate 22 located inside the weighing chamber 111. The bracket 21 of the buffer device 2 has a ring or square frame structure, with both ends connected to the support frame 12 and semi-enclosed above the hopper 11. The buffer plate 22 is installed on the bracket 21 and positioned near the opening 112. The buffer plate 22 is used to decelerate the material falling into the weighing chamber 111. After the material enters the weighing chamber 111 through the opening 112, it naturally concentrates towards the bottom due to the inverted conical structure, avoiding uneven loading. During weighing, the weight of the material is transferred to the weighing sensor 13 through the hopper 11.

[0047] The automatic weighing scale provided by this utility model has a weighing sensor 13 directly installed at the connection between the hopper 11 and the support frame 12. This sensor detects changes in the force on the hopper 11, avoiding force transmission loss and improving weighing accuracy. The support frame 12 is independently supported on the outer wall of the hopper 11 and works in conjunction with the weighing sensor 13. This ensures the stability of the hopper 11 and reduces interference from external vibrations on the weighing results. The buffer plate 22 is located inside the weighing chamber 111 near the opening 112. It directly decelerates the falling material, reducing the impact force and protecting the weighing sensor 13 from damage caused by instantaneous overload. The buffer device 2 is integrated with the scale body 1, saving space and adapting to compact production lines. The buffer plate 22 can also be adjusted in position and angle to adapt to the impact characteristics of different materials, ensuring that the material is effectively decelerated and falls smoothly into the weighing chamber 111. This avoids damage to the components of the automatic weighing scale from huge impact forces and extends the service life of the automatic weighing scale.

[0048] In some embodiments, as shown in FIG3, the buffer plate 22 includes a straight portion 221 and a buffer portion 222. The straight portion 221 is provided with a mounting plane that connects to the bracket 21. The connecting end of the buffer portion 222 is connected to the straight portion 221, and the free end is disposed near the inner wall of the hopper 11. The top of the buffer portion 222 is provided with a buffer slope, which slopes downward from the connecting end to the free end. When the material falls into the weighing chamber 111 from a height, it first impacts the buffer slope of the buffer plate 22. The impact changes the falling direction, and part of the impact force is absorbed by the buffer plate 22, which can effectively reduce the impact force of the material on the hopper 11 and avoid damage to the hopper 11.

[0049] In some embodiments, a rotary drive 23 is mounted on the support 21. The output end of the rotary drive 23 is connected to the straight section 221 via a connecting rod 24. The rotary drive 23 drives the buffer plate 22 to rotate in the horizontal plane, causing the material on the buffer slope to fall into the weighing chamber 111 under the action of centrifugal force. The rotary drive 23 can be a motor, and the output end of the motor is connected to the straight section 221 via a connecting rod 24 to drive the buffer plate 22 to rotate. The material can slide down quickly through the rotating buffer plate 22, reducing the residence time and adapting to viscous materials with poor flowability. Moreover, when the material falls at an off-center position or the flow rate is uneven, the rotary buffer plate 22 can adjust the flow direction in real time to ensure that the material falls evenly into the weighing chamber 111.

[0050] In some embodiments, the buffer section 222 is a conical plate, with a buffer ramp covering the upper surface of the conical plate. The output end of the rotary drive 23 is connected to the center of the straight section 221. The conical plate is symmetrical about its central axis. The motor is connected to the central axis of the conical plate via a connecting rod 24 to drive its rotation. This ensures that the inertial torque in all directions is balanced during rotation, and the impact force of the material is evenly distributed to the upper surface of the conical plate, i.e., the buffer ramp. This avoids the vibration or uneven torque caused by traditional eccentric rotation. The conical ramp naturally guides the material to diffuse in all directions, and the centrifugal force of rotation accelerates the dispersion of the material, making the falling path more uniform.

[0051] In some embodiments, the width of the buffer plate 22 is smaller than the width of the opening 112, creating a material passage gap between the edge of the buffer plate 22 and the inner wall of the hopper 11. This gap between the buffer plate 22 and the inner wall of the hopper 11 allows for material passage, preventing blockage. The material passage gap allows some material to slide directly along the inner wall of the hopper 11, avoiding a concentrated impact on the buffer plate 22. In other words, the material passage gap divides the material flow into two streams: the material at the center is slowed by the buffer plate 22, while the material at the edges falls directly through the gap. This dual-path design disperses the impact force, reduces the instantaneous load on the hopper 11 and the buffer plate 22, and extends their service life.

[0052] In some embodiments, as shown in Figure 2, the hopper 11 includes a transition section 113, a guide section 114, and a discharge section 115. The transition section 113 is cylindrical with an opening 112 at its upper end; the guide section 114 is funnel-shaped, with the lower end of the transition section 113 connected to the upper end of the guide section 114, and the bottom of the guide section 114 has a discharge port 116; the discharge section 115 is vertically arranged and connected to the lower end of the guide section 114. The diameter of the opening 112 at the upper end of the transition section 113 can be matched with the feeding equipment to form a vertical drop channel, allowing the material to fall freely and reducing direct impact on the structure below. The tapered funnel structure gathers the material towards the center, avoiding edge accumulation and ensuring balanced force on the weighing sensor 13. The funnel slope of the guide section 114 has an angle with the horizontal plane, ensuring that high-viscosity materials slide smoothly down. The straight cylindrical design of the discharge section 115 provides a stable discharge path and can quickly empty the material.

[0053] In some embodiments, a discharge valve is provided at the discharge port 116, which is used to open or close the discharge port 116. The discharge port 116, in conjunction with the straight cylindrical design of the discharge section 115, can provide a continuous and smooth flow path for the material, which helps to reduce blockages and other phenomena during the discharge process. The material flows quickly and stably along the straight cylindrical discharge section 115, avoiding material accumulation caused by complex and irregular channels.

[0054] It is understood that the opening 112 formed by the transition section 113 is the opening 112 of the hopper 11. The vertical cross-sectional shape of the transition section 113 is a cylindrical shape with equal diameter, and the cross-sectional diameter can match the outlet of the feeding equipment. The cavity formed by the inner wall of the guide section 114 is called the material cavity 111. The vertical cross-sectional shape of the guide section 114 is an inverted truncated cone. The upper cross-section is equal in diameter to the transition section 113, and the lower end narrows to the discharge port 116. The vertical cross-sectional shape of the discharge section 115 is a straight circular tube with equal diameter, and the diameter is the same as the discharge port 116 of the guide section 114. The three sections are connected with rounded chamfers to avoid material retention. The three-section hopper 11, through the coordinated design of its transition section 113 buffering the impact during material feeding, the guide section 114 uniformly collecting materials, and the discharge section 115 stably discharging materials, enables the sensor to be subjected to more balanced force, reducing dynamic weighing errors; enhancing versatility and adapting to various types of materials; reducing operation and maintenance costs, significantly decreasing the blockage rate and cleaning frequency, effectively extending the service life of the automatic weighing scale, and expanding the application range of the automatic weighing scale.

[0055] In some embodiments, the weighing scale body 1 includes at least two weighing sensors 13, which are evenly distributed around the circumference of the hopper 11. The weighing sensors 13 are evenly arranged around the hopper 11 to eliminate measurement errors caused by uneven material distribution. Each sensor independently detects the force at its corresponding connection point. If a single sensor is damaged, it can be replaced simply by removing the bolts at the corresponding connection point, thus shortening maintenance time.

[0056] In some embodiments, as shown in Figure 1, the support 21 includes a first connecting section 21a, a second connecting section 21b, and a third connecting section 21c. The first connecting section 21a is horizontally arranged and located above the hopper 11. A buffer plate 22 is connected to the first connecting section 21a. Specifically, the buffer plate 22 is connected at the center of the first connecting section 21a. The length of the first connecting section 21a is greater than the diameter of the opening 112 of the hopper 11 to avoid interference between the weighing scale body 1 and the support 21. The second connecting section 21b is vertically arranged, and the upper ends of the two second connecting sections 21b are respectively connected to the two ends of the first connecting section 21a. The third connecting section 21c is horizontally arranged, and the lower end of the second connecting section 21b is connected to one end of the third connecting section 21c. The other end of the third connecting section 21c is connected to the support frame 12. The three-section connection structure makes the support 21 more supportive and avoids vibration or shaking when materials are impacted.

[0057] In some embodiments, the first connecting segment 21a, the second connecting segment 21b, and the third connecting segment 21c are all rods, which can be square or round. These rods prevent the support 21 from obstructing the material and affecting its descent. The smooth transition between the first connecting segment 21a and the second connecting segment 21b, and between the second connecting segment 21b and the third connecting segment 21c, eliminates stress concentration at right-angle welds and improves fatigue life. The first connecting segment 21a bears the main impact force, the second connecting segment 21b disperses the load vertically, and the third connecting segment 21c is fixed to the support frame 12, further transmitting the load, thus achieving graded dissipation of the impact force.

[0058] The automatic weighing scale provided by this utility model has a weighing sensor 13 directly installed at the connection between the hopper 11 and the support frame 12. This sensor detects changes in the force on the hopper 11, avoiding force transmission loss and improving weighing accuracy. The support frame 12 is independently supported on the outer wall of the hopper 11 and works in conjunction with the weighing sensor 13. This ensures the stability of the hopper 11 and reduces interference from external vibrations on the weighing results. The buffer plate 22 is located inside the weighing chamber 111 near the opening 112. It directly decelerates the falling material, reducing the impact force and protecting the weighing sensor 13 from damage caused by instantaneous overload. The buffer device 2 is integrated with the scale body 1, saving space and adapting to compact production lines. The buffer plate 22 can also be adjusted in position and angle to adapt to the impact characteristics of different materials, ensuring that the material is effectively decelerated and falls smoothly into the weighing chamber 111. This avoids damage to the components of the automatic weighing scale from huge impact forces and extends the service life of the automatic weighing scale.

[0059] It should be noted that, in this utility model, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to the directions indicated by the accompanying drawings.

[0060] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An automatic weighing scale, characterized in that, The automatic weighing scale includes: a weighing scale body (1), including a hopper (11), a support frame (12), and a weighing sensor (13). The hopper (11) is provided with a weighing chamber (111) with an opening (112) at the top. The support frame (12) is located outside the weighing chamber (111) and supported on the outer wall of the hopper (11). The weighing sensor (13) is used to weigh the material in the weighing chamber (111) and is located at the connection between the hopper (11) and the support frame (12). A buffer device (2) includes a bracket (21) located outside the weighing chamber (111) and a buffer plate (22) located inside the weighing chamber (111). The buffer plate (22) is installed on the bracket (21) and is located near the opening (112). The buffer plate (22) is used to decelerate the material falling into the weighing chamber (111).

2. The automatic weighing scale according to claim 1, characterized in that, The buffer plate (22) includes: a straight part (221) with a mounting plane connected to the bracket (21); and a buffer part (222) with the connecting end of the buffer part (222) connected to the straight part (221) and the free end located near the inner wall of the hopper (11). The top of the buffer part (222) is provided with a buffer slope, which slopes downward from the connecting end to the free end.

3. The automatic weighing scale according to claim 2, characterized in that, A rotary drive (23) is installed on the bracket (21). The output end of the rotary drive (23) is connected to the straight part (221) through a connecting rod (24). The rotary drive (23) is used to drive the buffer plate (22) to rotate in the horizontal plane, so that the material on the buffer slope falls into the weighing chamber (111) under the action of centrifugal force.

4. The automatic weighing scale according to claim 3, characterized in that, The buffer section (222) is a conical plate, the buffer slope covers the upper surface of the conical plate, and the output end of the rotary drive (23) is connected to the center of the straight section (221).

5. The automatic weighing scale according to any one of claims 1 to 4, characterized in that, The width of the buffer plate (22) is smaller than the width of the opening (112), so that there is a material passage gap between the edge of the buffer plate (22) and the inner wall of the hopper (11).

6. The automatic weighing scale according to any one of claims 1 to 4, characterized in that, The hopper (11) includes: a transition section (113), which is cylindrical and has an opening (112) at its upper end; a guide section (114), which is funnel-shaped, with the lower end of the transition section (113) connected to the upper end of the guide section (114), and the bottom of the guide section (114) having a discharge port (116); and a discharge section (115), which is vertically arranged and connected to the lower end of the guide section (114).

7. The automatic weighing scale according to claim 6, characterized in that, A discharge valve is provided at the discharge port (116), which is used to open or close the discharge port (116).

8. The automatic weighing scale according to any one of claims 1 to 4, characterized in that, The weighing scale body (1) includes at least two weighing sensors (13), which are evenly distributed along the circumference of the hopper (11).

9. The automatic weighing scale according to any one of claims 1 to 4, characterized in that, The bracket (21) includes: a first connecting section (21a), which is horizontally arranged and located above the hopper (11), and the buffer plate (22) is connected to the first connecting section (21a); ​​a second connecting section (21b), which is vertically arranged, and the upper ends of the two second connecting sections (21b) are respectively connected to the two ends of the first connecting section (21a); ​​and a third connecting section (21c), which is horizontally arranged, and the lower end of the second connecting section (21b) is connected to one end of the third connecting section (21c), and the other end of the third connecting section (21c) is connected to the support frame (12).

10. The automatic weighing scale according to claim 9, characterized in that, The first connecting segment (21a), the second connecting segment (21b), and the third connecting segment (21c) are all rods. The first connecting segment (21a) and the second connecting segment (21b) are smoothly connected, and the second connecting segment (21b) and the third connecting segment (21c) are smoothly connected.

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