Mounting structure of pressure sensor and measuring device having the same

Abstract

The present invention provides a mounting structure for a pressure sensor and a metering device having the same, wherein the mounting structure includes: a mounting seat, suitable for connecting to a structure to be weighed, a first mounting hole being provided at the bottom of the mounting seat; a limiting plate, arranged below the mounting seat and abutting the bottom wall of the mounting seat, a connecting column being provided on the limiting plate, the connecting column passing through the first mounting hole, the lower surface of the limiting plate being suitable for cooperating with the pressure sensor; a fastening assembly, arranged on the connecting column and used to connect the limiting plate to the mounting seat, wherein the size of the first mounting hole is larger than the cross-sectional size of the connecting column, and one or both of the contact surfaces of the mounting seat and the limiting plate are arc-shaped surfaces. The technical solution of the present invention solves the problem of the complex structure of the mounting structure of the pressure sensor in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of concrete mixing equipment, and in particular to an installation structure of a pressure sensor and a metering device having the same. Background Art

[0002] During the production process of a concrete mixing plant, cement and admixtures are transported to a metering hopper for weighing through equipment such as screw conveyors, and the powder is generally weighed using mass measurement. At present, due to considerations such as installation, shipment, and size, domestic concrete mixing plants generally use pressure sensors for powder measurement. The pressure sensors are arranged at three points to ensure that they are evenly arranged on the same plane. The pressure sensing metering device mainly consists of three parts: a metering frame, a pressure sensor, a metering hopper, and a mounting block. Among them, the mounting block is welded to the metering frame, and the metering frame is a frame steel structure used to support the metering hopper. In order to install the pressure sensing metering structure, a mounting seat is welded to the metering hopper body, and one end of the pressure sensor is connected to the mounting block, and the other end is connected to the mounting seat. However, the installation structure of the above-mentioned pressure sensor has the following problems:

[0003] 1. The mounting base and mounting block are processed separately during the manufacturing process, resulting in very poor dimensional accuracy of their relative positions; 2. Deformation of the metering bucket body causes poor positioning and parallelism between the center hole on the bottom surface of the mounting base and the sensor assembly column. Ideally, after assembly, to ensure metering accuracy, the weighing sensor should be protected from forces acting in non-gravity directions. However, due to the above-mentioned defects, during on-site installation, the mounting base hole and the center of the sensor assembly column may be misaligned, leading to jamming and other phenomena. This can cause improper installation and cause the pressure sensor to generate additional lateral forces, causing the pressure sensor to transmit erroneous signals, thereby affecting metering accuracy and ultimately the quality of the finished concrete. In order to meet installation requirements, on-site adjustments sometimes require cutting off the mounting block, repositioning it, and then re-welding it, which seriously affects the product's appearance quality and production efficiency.

[0004] To address the above-mentioned issues, some existing solutions incorporate a position adjustment mechanism into the material metering device, thereby eliminating the problem of improper assembly of the pressure sensor due to processing or deformation. For example, in Chinese patent number CN111765955A, a screw-nut mechanism and a guide rail mechanism are used to adjust the relative position of the weighing sensor and the weighing sensor mounting base, thereby ensuring accurate alignment of the two. In another example, in Chinese patent number CN103557922B, a thrust bearing is provided between the boss and the perforated mounting block, allowing the pressure sensor to rotate after being mounted on the perforated mounting block, thereby reducing installation difficulty and improving installation accuracy.

[0005] However, in both of the above solutions, a drive mechanism or transmission mechanism (motor, guide rail and thrust bearing) needs to be introduced between the original metering bucket and the metering bucket support frame. On the one hand, the above solutions increase the structural complexity of the metering device and increase the cost, and on the other hand, they also add new potential failure points. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the complicated structure of the installation structure of the pressure sensor in the prior art, thereby providing a installation structure of the pressure sensor and a metering device having the same.

[0007] In order to solve the above problems, the present invention provides a mounting structure for a pressure sensor, including: a mounting seat, suitable for being connected to a structure to be weighed, and a first mounting hole is provided at the bottom of the mounting seat; a limiting plate, arranged below the mounting seat, and the limiting plate abuts against the bottom wall of the mounting seat, and a connecting column is provided on the limiting plate, and the connecting column passes through the first mounting hole, and the lower surface of the limiting plate is suitable for cooperating with the pressure sensor; a fastening assembly, arranged on the connecting column, and used to connect the limiting plate to the mounting seat, wherein the size of the first mounting hole is larger than the cross-sectional size of the connecting column, and one or two of the contact surfaces of the mounting seat and the limiting plate are arc-shaped surfaces.

[0008] Optionally, a gap between the first mounting hole and the connecting column is in the range of 5 to 15 mm.

[0009] Optionally, the connecting column has an external threaded section, and the fastening assembly includes a pressure plate and a fastening nut. A second mounting hole is provided on the pressure plate, and the pressure plate is sleeved on the outside of the connecting column through the second mounting hole. The fastening nut is provided on the external threaded section, wherein the size of the pressure plate is larger than the size of the first mounting hole.

[0010] Optionally, the surface of the limiting plate facing the mounting seat is an arc-shaped surface, and the surface is a spherical crown surface.

[0011] Optionally, a connection hole is provided on the lower surface of the limiting plate, and the connection hole is connected to the assembly column of the pressure sensor.

[0012] Optionally, the mounting base includes a side plate, a bottom plate and a reinforcement plate, the reinforcement plate is connected between the side plate and the bottom plate, the side plate is suitable for connecting to the structure to be weighed, and the first mounting hole is provided on the bottom plate.

[0013] Optionally, the mounting structure further includes a sensor mounting plate, the pressure sensor is fixedly connected to the sensor mounting plate, and the sensor mounting plate is suitable for being connected to an external supporting structure.

[0014] Optionally, the structure to be weighed is a measuring bucket, and the external supporting structure is a measuring bucket frame.

[0015] The present invention also provides a metering device, including a metering bucket frame, a metering bucket and a pressure sensor. The metering bucket is arranged in the metering bucket frame, and the pressure sensor is connected between the metering bucket and the metering bucket frame through an installation structure. The installation structure is the above-mentioned installation structure.

[0016] Optionally, there are multiple pressure sensors, and the multiple pressure sensors are arranged circumferentially around the metering bucket.

[0017] The present invention has the following advantages:

[0018] By utilizing the technical solution of the present invention, since the size of the first mounting hole is larger than the cross-sectional size of the connecting column, when the limiting plate and the mounting seat are installed, if there is a deviation in their horizontal positions, the relative position of the connecting column in the first mounting hole can be adjusted and fixed by the fastening assembly to ensure smooth installation. When there is a non-parallel situation between the limiting plate and the bottom surface of the mounting seat, since there is an arc surface on the contact surface between the two, there will be point contact between the limiting plate and the mounting seat, thereby adjusting the parallelism error, preventing the generation of lateral force on the pressure sensor, and ensuring measurement accuracy. The above structure can ensure the installation accuracy and measurement accuracy of the pressure sensor without adding other structures, thereby making the overall structure of the metering device simple and low-cost, and at the same time does not increase other potential failure points. Therefore, the technical solution of the present invention solves the defect of the complex structure of the mounting structure of the pressure sensor in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 Shows a schematic structural diagram of the metering device of the present invention;

[0021] Figure 2 Shown Figure 1 A in the middle is an enlarged schematic diagram (i.e. the installation structure of the pressure sensor);

[0022] Figure 3 Shown Figure 2 The enlarged schematic diagram of point B in the middle;

[0023] Figure 4 Shown Figure 2 A top view of the mounting base, pressure sensor, and sensor mounting plate of the central mounting structure;

[0024] Figure 5Shown Figure 2 A schematic diagram of the relative positions of the connecting column and the first mounting hole of the middle mounting structure;

[0025] Figure 6 Shown Figure 2 A side view schematic diagram of the limiting plate of the middle mounting structure;

[0026] Figure 7 Shown Figure 2 A schematic top view of the pressure plate of the mounting structure; and

[0027] Figure 8 Shown Figure 1 Schematic top view of the metering device.

[0028] Description of reference numerals:

[0029] 10. Mounting seat; 11. First mounting hole; 12. Side panel; 13. Bottom plate; 14. Reinforcement plate; 20. Limiting plate; 21. Connecting column; 211. Externally threaded section; 22. Connecting hole; 30. Fastening assembly; 31. Pressure plate; 311. Second mounting hole; 32. Fastening nut; 40. Sensor mounting plate; 100. Pressure sensor; 101. Assembly column; 200. Measuring bucket; 300. Measuring bucket frame. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or 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 the present invention based on the specific circumstances.

[0033] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] like Figures 1 to 3 As shown, a mounting structure of a pressure sensor of this embodiment includes a mounting base 10, a limiting plate 20 and a fastening assembly 30. The mounting base 10 is suitable for being connected to the structure to be weighed, and a first mounting hole 11 is provided at the bottom of the mounting base 10. The limiting plate 20 is provided below the mounting base 10, and the limiting plate 20 abuts against the bottom wall of the mounting base 10. A connecting column 21 is provided on the limiting plate 20, and the connecting column 21 passes through the first mounting hole 11, and the lower surface of the limiting plate 20 is suitable for cooperating with the pressure sensor 100. The fastening assembly 30 is provided on the connecting column 21, and is used to connect the limiting plate 20 to the mounting base 10. Furthermore, the size of the first mounting hole 11 is larger than the cross-sectional size of the connecting column 21, and any one or both of the contact surfaces of the mounting base 10 and the limiting plate 20 are arc-shaped surfaces.

[0035] Utilizing the technical solution of this embodiment, since the size of the first mounting hole 11 is larger than the cross-sectional size of the connecting column 21, when the limiting plate 20 and the mounting base 10 are installed, if there is a deviation in their horizontal positions, the relative position of the connecting column 21 in the first mounting hole 11 can be adjusted and fixed by the fastening assembly 30 to ensure smooth installation. When there is a non-parallel situation between the limiting plate 20 and the bottom surface of the mounting base 10, since there is an arc-shaped surface on the contact surface between the two, there will be point contact between the limiting plate 20 and the mounting base 10, thereby adjusting the parallelism error, preventing the pressure sensor 100 from generating lateral force, and ensuring measurement accuracy. The above structure can ensure the installation accuracy and measurement accuracy of the pressure sensor without adding other structures, thereby making the overall structure of the metering device simple and low-cost, and at the same time does not increase other potential failure points. Therefore, the technical solution of this embodiment solves the defect of the complex structure of the mounting structure of the pressure sensor in the prior art.

[0036] It should be noted that the size of the first mounting hole 11 is larger than the cross-sectional size of the connecting column 21, which means that after the connecting column 21 passes through the first mounting hole 11, there is a gap between the two, thereby enabling the connecting column 21 to adjust its position in the first mounting hole 11. Figure 4 As can be seen, in this embodiment, the first mounting hole 11 is a circular hole, and the connecting post 21 is a cylindrical hole. Therefore, the diameter of the first mounting hole 11 only needs to be larger than the outer diameter of the connecting post 21. Of course, in some embodiments not shown, the cross-section of the connecting post 21 may be square, hexagonal, or other regular / irregular shapes, or the shape of the first mounting hole 11 may also be other shapes besides circular. In this case, by making the size of the first mounting hole 11 larger than the cross-sectional size of the connecting post 21 and providing a gap between the first mounting hole 11 and the connecting post 21, the connecting post 21 can be adjusted within the first mounting hole 11.

[0037] It should be noted that the above-mentioned curved surface refers to the curved surface that bulges in the middle. Specifically, if the mounting base 10 is not parallel to the limiting plate 20, there will be an angle between the two after contact. When the fastening assembly 30 is installed, the above-mentioned angle will be converted into a lateral force on the pressure sensor 100, thereby affecting the accuracy of the measurement structure. After the above-mentioned curved surface is set, even if the mounting base 10 is not parallel to the limiting plate 20, the curved surface can provide at least one point support at the contact point between the two, thereby preventing lateral force from being applied to the pressure sensor 100. "One or two of the contact surfaces of the mounting base 10 and the limiting plate 20 are curved surfaces" means that the setting method of the curved surface includes: the surface of the mounting base 10 facing the limiting plate 20 is a curved surface, or the surface of the limiting plate 20 facing the mounting base 10 is a curved surface, or the surfaces of the mounting base 10 and the limiting plate 20 that contact each other are both curved surfaces.

[0038] It should be noted that the cantilever beam pressure sensor commonly used in the prior art consists of a front cantilever beam and a rear fixed end. The rear fixed end is provided with screw holes for securing to an external support structure. The front cantilever beam is suspended below, while the upper portion of the cantilever beam is supported on the structure to be weighed via mounting posts. In other words, in this embodiment, the lower surface of the limit plate 20 is connected to the mounting posts of the cantilever beam pressure sensor.

[0039] like Figures 4 to 7 As shown, in the technical solution of this embodiment, the gap between the first mounting hole 11 and the connecting column 21 is within the range of 5 to 15 mm. Specifically, the first mounting hole 11 is a circular hole, and the connecting column 21 is a cylindrical column, that is, the diameter of the first mounting hole 11 is greater than the outer diameter of the connecting column 21 within the range of 5 to 15 mm. Figure 5The dotted line in the middle circle represents the adjustable position of the connecting column 21. It can be seen that the connecting column 21 can be adjusted in various directions in the horizontal direction, thereby adjusting the horizontal installation error between the mounting seat 10 and the limit plate 20 to avoid misalignment between the mounting seat hole and the center of the sensor assembly column.

[0040] Of course, those skilled in the art can adjust the above gap range according to actual needs, and is not limited to the range of 5 to 15 mm, for example, by expanding or reducing the above range.

[0041] like Figure 3 、 Figure 4 and Figure 6 As shown, in the technical solution of this embodiment, the connecting column 21 has an external thread section 211, and the fastening assembly 30 includes a pressure plate 31 and a fastening nut 32. A second mounting hole 311 is provided on the pressure plate 31. The pressure plate 31 is sleeved on the outside of the connecting column 21 through the second mounting hole 311, and the pressure plate 31 is located on the inner side of the mounting seat 10. The fastening nut 32 is set on the external thread section 211. The size of the pressure plate 31 is larger than the size of the first mounting hole 11. Figure 3 It can be seen that after the fastening nut 32 is tightened, it provides a downward tightening force to the pressure plate 31, thereby making the upper surface of the limit plate 20 and the lower surface of the mounting base 10 tightly attached to each other. It should be noted that the fastening assembly 30 may also include a connecting pad, which connects the pressure plate 31 and the fastening nut 32 so that the fastening force after the fastening nut 32 is tightened is transmitted to the pressure plate 31, and at the same time can further provide a tightening and anti-loosening effect. Since the size of the fastening nut 32 is smaller than the aperture of the first mounting hole 11, the pressure plate 31 needs to be provided in this embodiment to prevent the fastening nut 32 from falling out of the first mounting hole 11 downward. Of course, in some embodiments not shown, if the outer diameter of the fastening nut 32 is larger than the size of the first mounting hole 11, it is also a feasible embodiment not to provide the pressure plate 31.

[0042] It should be noted that the diameter of the second mounting hole 311 is larger than the outer diameter of the connecting post 21, thereby creating a gap between the two. Specifically, when there is a parallelism error between the mounting base 10 and the limiting plate 20, this gap allows the pressure plate 31 to have a certain tilt angle relative to the connecting post 21. As a result, after tightening the fastening nut 32, only a downward pressure is applied to the pressure plate 31, preventing lateral force from being applied to the pressure sensor 100.

[0043] like Figure 3As shown, in the technical solution of this embodiment, the surface of the limit plate 20 facing the mounting seat 10 is an arc-shaped surface, and this surface is a spherical crown surface. Specifically, the spherical crown surface allows a point on the spherical crown surface to provide support for the mounting seat 10 above when a parallelism error exists between the limit plate 20 and the mounting seat 10, thereby protecting the pressure sensor 100 from lateral forces.

[0044] like Figure 3 As shown, in the technical solution of this embodiment, a connecting hole 22 is provided on the lower surface of the limiting plate 20, and the connecting hole 22 is connected to the assembly column 101 of the pressure sensor 100. Specifically, during assembly, the pressure sensor 100 is first connected to the external support structure, and then the assembly column 101 of the pressure sensor 100 is connected to the connecting hole 22 on the lower surface of the limiting plate 20, and then the position of the structure to be weighed is adjusted downward. The connecting column 21 on the limiting plate 20 is made to pass upward through the first mounting hole 11 of the mounting seat 10, and finally the fastening assembly 30 is installed. When bearing weight, the weight of the structure to be weighed is transferred to the assembly column 101 through the limiting plate 20, and then the weight is weighed by the pressure sensor 100.

[0045] like Figure 2 As shown, in the technical solution of this embodiment, the mounting base 10 includes a side plate 12, a base plate 13, and a reinforcement plate 14. The reinforcement plate 14 is connected between the side plate 12 and the base plate 13. The side plate 12 is suitable for connection to the structure to be weighed, and the first mounting hole 11 is provided in the base plate 13. Specifically, the side plate 12 is a square plate, which is attached to the surface of the structure to be weighed by welding or other means. One end of the base plate 13 is connected to the side plate 12, and the other end extends away from the side plate 12, and the base plate 13 and the side plate 12 are perpendicular to each other. The first mounting hole 11 is provided in the base plate 13, and the upper surface of the limit plate 20 abuts the lower surface of the base plate 13. After the fastening assembly 30 is in place, the lower surface of the pressure plate 31 abuts the upper surface of the base plate 13. In other embodiments, multiple reinforcement plates 14 may be provided. The reinforcement plates 14 have a triangular structure and are connected between the side plate 12 and the base plate 13. Furthermore, two reinforcing plates 14 are provided, one on each side of the bottom plate 13. The reinforcing plates 14 are used to ensure the connection strength between the side plates 12 and the bottom plate 13. The shapes of the connecting plates in the mounting base 10, such as the side plates 12, bottom plate 13, or reinforcing plates 14, are not limited and may be square, triangular, trapezoidal, or other polygonal shapes.

[0046] like Figure 2As shown, in the technical solution of this embodiment, the mounting structure also includes a sensor mounting plate 40, to which the pressure sensor 100 is fixedly connected. The sensor mounting plate 40 is suitable for connection to the external support structure. Specifically, the end of the cantilever beam pressure sensor facing away from the mounting post 101 is fastened to the sensor mounting plate 40 via two bolts. The sensor mounting plate 40 is fixedly mounted (e.g., by welding, fastening assembly connection, etc.) on the external support structure, thereby enabling the pressure sensor 100 to be fixed to the external support structure.

[0047] like Figure 8 As shown, in the technical solution of this embodiment, the structure to be weighed is a weighing hopper 200, and the external supporting structure is a weighing hopper frame 300. Specifically, the weighing hopper 200 is used in a concrete mixing plant. Of course, those skilled in the art will understand that the above-mentioned pressure sensor mounting structure is not limited to use in the weighing hopper 200 and concrete mixing plants, and can also be used in other load-bearing structures requiring the use of pressure sensors.

[0048] like Figure 1 and Figure 8 As shown, this embodiment further provides a metering device, including a metering bucket frame 300, a metering bucket 200, and a pressure sensor 100. The metering bucket 200 is disposed within the metering bucket frame 300, and the pressure sensor 100 is connected between the metering bucket 200 and the metering bucket frame 300 via a mounting structure, the mounting structure being the aforementioned mounting structure.

[0049] like Figure 8 As shown, in the technical solution of this embodiment, there are multiple pressure sensors 100, and the multiple pressure sensors 100 are arranged circumferentially around the metering hopper 200. Preferably, three pressure sensors 100 are arranged around each metering hopper 200.

[0050] According to the above structure, the installation structure of the pressure sensor in this embodiment has the following characteristics:

[0051] The mounting structure of this embodiment is composed of a mounting seat 10 , a limiting plate 20 and a fastening assembly 30 .

[0052] Mounting base 10 features a large-diameter adjustment hole (also known as first mounting hole 11) on its base. Based on common installation tolerances, the diameter should maintain an adjustable range of 5-15 mm. If dimensional errors occur, the powder metering hopper can be adjusted in multiple directions through the large-diameter mounting hole, thus resolving any misalignment between first mounting hole 11 and sensor mounting post 101.

[0053] The bottom of the limit plate 20 is provided with an opening (i.e., connecting hole 22), which is tightly connected to the mounting post 101 on the cantilever end of the pressure sensor. The bottom surface of the limit plate 20 contacts the pressure-bearing surface of the mounting post 101, transmitting pressure. A threaded post (i.e., connecting post 21) is welded to the flat surface of the end of the limit plate 20 facing away from the mounting post 101. This threaded post is bolted to the first mounting hole 11. Furthermore, the flat surface of the limit plate 20 facing away from the mounting post 101 is designed as an arc to adjust for parallelism errors with the mounting base 10.

[0054] The pressure plate 31 of the fastening assembly 30 is designed with an opening (i.e., the second mounting hole 311), and the length of the pressure plate 31 should be larger than the diameter of the first mounting hole 11. After the mounting base 10 and the pressure sensor 100 are positioned, and the threaded studs of the stop plate 20 are aligned, they are installed on-site according to their positions and secured with bolts.

[0055] During installation, first, the pressure sensor 100 is fixedly connected to the metering bucket frame 300 through the sensor mounting plate 40, and is tightly connected to the limit plate 20 through the connection hole 22. Then, the metering bucket 200 is hoisted upward for alignment adjustment. Generally, any two points of the three-point connection can be assembled according to the center alignment. If the third connection point is assembled with a dimensional error, it can be adjusted in multiple directions through the first mounting hole 11. After adjustment, it is fixed through the pressure plate 31 and the fastening nut 32. In this way, even if there are dimensional errors caused by manufacturing and deformation, the first mounting hole 11 of the mounting seat 10 and the center of the sensor assembly column 101 will not be misaligned. At the same time, the arc surface of the end of the limit plate 20 away from the assembly column contacts the bottom plate of the mounting seat 10, and the parallelism error of the mounting seat 10 is adjusted, which can solve the problem of the first mounting hole 11 of the mounting seat 10 and the center of the sensor assembly column 101 being stuck.

[0056] According to the above structure, the installation structure of the pressure sensor in this embodiment has the following advantages:

[0057] 1. Simple structure, mechanical adjustment and more reliable performance;

[0058] 2. It can realize multi-directional adjustment to solve the problem of misalignment between the existing structural mounting base and the sensor mounting column head;

[0059] 3. Solve the problem of the mounting hole and the center of the sensor assembly column being stuck;

[0060] 4. Prefabricated structure, easy to manufacture and ship, and low difficulty in on-site operation;

[0061] 5. No new hidden fault hazards.

[0062] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A mounting structure for a pressure sensor, characterized in that: include: A mounting seat (10) adapted to be connected to a structure to be weighed, wherein a first mounting hole (11) is provided at the bottom of the mounting seat (10); A limit plate (20) is provided below the mounting seat (10), and the limit plate (20) abuts against the bottom wall of the mounting seat (10); a connecting column (21) is provided on the limit plate (20), and the connecting column (21) passes through the first mounting hole (11); the lower surface of the limit plate (20) is suitable for cooperating with the pressure sensor (100); a connecting hole (22) is provided on the lower surface of the limit plate (20), and the connecting hole (22) is connected to the assembly column (101) of the pressure sensor (100); A fastening assembly (30) is provided on the connecting column (21) and is used to connect the limiting plate (20) to the mounting seat (10), the connecting column (21) having an external thread section (211), the fastening assembly (30) comprising a pressing plate (31) and a fastening nut (32), the pressing plate (31) being provided with a second mounting hole (311), the pressing plate (31) being sleeved on the outside of the connecting column (21) through the second mounting hole (311), and the fastening nut (32) being provided on the external thread section (211); The size of the pressure plate (31) is larger than the size of the first mounting hole (11), the diameter of the second mounting hole (311) is larger than the outer diameter of the connecting column (21), and the size of the first mounting hole (11) is larger than the cross-sectional size of the connecting column (21), so that the relative position of the connecting column (21) in the first mounting hole (11) can be adjusted and fixed by the fastening assembly (30); any one or two of the contact surfaces of the mounting seat (10) and the limiting plate (20) are arc-shaped surfaces, and when the limiting plate (20) and the bottom surface of the mounting seat (10) are not parallel, the arc-shaped surface can make point contact between the limiting plate (20) and the mounting seat (10) so as to adjust the parallelism error and prevent lateral force from being generated on the pressure sensor (100).

2. The mounting structure according to claim 1, wherein: The gap between the first mounting hole (11) and the connecting column (21) is in the range of 5 to 15 mm.

3. The mounting structure according to claim 1, wherein: The surface of the limiting plate (20) facing the mounting seat (10) is an arc-shaped surface, and the surface is a spherical crown surface.

4. The mounting structure according to claim 1, wherein: The mounting seat (10) comprises a side plate (12), a bottom plate (13) and a reinforcing plate (14); the reinforcing plate (14) is connected between the side plate (12) and the bottom plate (13); the side plate (12) is suitable for being connected to the structure to be weighed; and the first mounting hole (11) is provided on the bottom plate (13).

5. The mounting structure according to claim 1, wherein: The mounting structure further comprises a sensor mounting plate (40), the pressure sensor (100) is fixedly connected to the sensor mounting plate (40), and the sensor mounting plate (40) is suitable for being connected to an external supporting structure.

6. The mounting structure according to claim 5, characterized in that: The structure to be weighed is a measuring bucket (200), and the external supporting structure is a measuring bucket frame (300).

7. A metering device comprising a metering bucket frame (300), a metering bucket (200) and a pressure sensor (100), wherein the metering bucket (200) is arranged in the metering bucket frame (300), and the pressure sensor (100) is connected between the metering bucket (200) and the metering bucket frame (300) via a mounting structure, characterized in that: The mounting structure is the mounting structure according to any one of claims 1 to 6.

8. The metering device according to claim 7, characterized in that There are a plurality of pressure sensors (100), and the plurality of pressure sensors (100) are arranged circumferentially around the measuring hopper (200).

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