Limiting structure, weighing device and weighing component

Abstract

The limiting structure installed on the weighing module is used for limiting movement of a top plate in the first direction and comprises a first limiting assembly arranged between a material tank and the weighing module, the first limiting assembly comprises an upper limiting plate, a lower limiting plate and a sliding assembly, the upper limiting plate is fixedly connected with the material tank, and the lower limiting plate is fixedly connected with the sliding assembly. The lower limiting plate and the upper limiting plate are connected in a relatively movable manner and are relatively and fixedly connected with the top plate, and the sliding assembly is arranged between the upper limiting plate and the lower limiting plate to allow the upper limiting plate and the lower limiting plate to move relatively in the first direction so as to guarantee the weighing precision. The utility model further provides a weighing component and a weighing device comprising the limiting structure.

Description

Technical Field

[0001] The utility model relates to the field of weighing, in particular to the field of weighing modules. Background Art

[0002] The weighing module consists of a top plate, a bottom plate and a weighing sensor located between the two. The weighing sensor senses the force and produces a tiny mechanical deformation to obtain weight data.

[0003] The weighing module connected to the feed tank is easily affected by the deformation of the tank, which causes the top plate to expand and displace, and then causes the sensor or force introduction component to tilt and displace, affecting the weighing accuracy. Utility Model Content

[0004] One purpose of the utility model is to provide a limiting structure that can ensure weighing accuracy.

[0005] To achieve the above-mentioned purpose, a limiting structure is installed on the weighing module, and the upper part of the weighing module is used to support the material tank. The weighing module includes a top plate, a bottom plate and a weighing sensor located therebetween. The limiting structure is used to limit the movement of the top plate along the first direction. The limiting structure includes a first limiting assembly arranged between the supporting material tank and the weighing module. The first limiting assembly includes an upper limiting plate, a lower limiting plate and a sliding assembly. The upper limiting plate is fixedly connected to the material tank, and the lower limiting plate is relatively movably connected to the upper limiting plate and relatively fixedly connected to the top plate. The sliding assembly is arranged between the upper limiting plate and the lower limiting plate to allow the upper limiting plate and the lower limiting plate to move relative to each other along the first direction.

[0006] In one or more embodiments, the lower limit plate is connected to the upper limit plate through a first connecting member, and the lower limit plate includes a through hole that cooperates with the first connecting member, and the through hole has a length direction extending along the first direction to allow the first connecting member to move relative to the lower limit plate along the first direction.

[0007] In one or more embodiments, the through hole is further configured to limit the movement of the first connecting member in a second direction perpendicular to the first direction.

[0008] In one or more embodiments, the column of the first connecting member includes a step structure, and the through hole includes a step hole for cooperating with the step structure.

[0009] In one or more embodiments, the sliding assembly includes a sliding member and a base support for supporting the sliding member, the sliding member and the base support are respectively arranged on one and the other of the upper limit plate and the lower limit plate, and the sliding direction of the sliding member is the first direction.

[0010] In one or more embodiments, a thinning groove extending along a first direction is provided in a region where the upper limit plate or the lower limit plate contacts the sliding member, so as to reduce a gap between the upper limit plate and the lower limit plate.

[0011] In one or more embodiments, the area where the upper limit plate or the lower limit plate contacts the sliding member is a hardened surface.

[0012] In one or more embodiments, the sliding member and the base are made of ceramic material, phenolic material or stainless steel.

[0013] In one or more embodiments, the base bracket is arranged on the lower limit base plate, and the lower limit base plate is provided with a receiving groove for receiving the base bracket.

[0014] In one or more embodiments, the lower limiting plate is fixedly connected to the top plate via a second connecting member.

[0015] In one or more embodiments, the limiting structure also includes a second limiting assembly arranged between the top plate and the bottom plate, the second limiting assembly including an upper limit block, a lower limit block and a pull rod assembly, the upper limit block is fixedly connected to the top plate; the lower limit block is fixedly connected to the bottom plate; the pull rod assembly is connected to the upper limit block and the lower limit block, and the pulling direction of the pull rod assembly is the first direction to constrain the relative displacement of the top plate and the bottom plate along the first direction.

[0016] In one or more embodiments, the upper limit block is connected to the top plate and the lower limit plate through the second connecting member.

[0017] In one or more embodiments, the length directions of the upper limit block and the lower limit block are perpendicular to the first direction, and at least two of the pull rod assemblies are distributed on both sides along the length direction thereof.

[0018] In one or more embodiments, the upper limit block is provided with a first thinning area, wherein the first thinning area includes a side wall and a thinning region defined by the side wall to position the top plate.

[0019] In one or more embodiments, the sides of the upper limit plate and the lower limit plate are respectively provided with marking grooves, and the marking grooves are configured to be aligned in the vertical direction when the upper limit plate and the lower limit plate do not move relative to each other.

[0020] Another object of the present invention is to provide a weighing device, comprising a top plate, a bottom plate, a weighing sensor located therebetween, and the above-mentioned limiting structure.

[0021] Another object of the present invention is to provide a weighing component, comprising a carrying tank and a plurality of weighing modules circumferentially arranged at the bottom of the carrying tank, and also comprising the above-mentioned limiting structure, wherein the first direction is the radial direction of the carrying tank.

[0022] The above-mentioned limiting structure absorbs the load in the first direction through the relative movement of the upper limit plate and the lower limit plate along the first direction, so as to limit the movement of the weighing module, especially the top plate, along the first direction, thereby avoiding causing tilt displacement of the sensor or force introduction component and ensuring weighing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0024] Figure 1 This is a disassembled diagram of the limit structure and weighing module components;

[0025] Figure 2 It is the assembly drawing of the limit structure and weighing module;

[0026] Figure 3 This is a top view of the weighing module and the tank;

[0027] Figure 4 It is a front view of the limiting structure in a normal state;

[0028] Figure 5 It is a side view of the limiting structure in a normal state;

[0029] Figure 6 is a side view of the limiting structure in an offset state;

[0030] Figure 7 is a side view of the limiting structure in an offset state;

[0031] Figure 8 Schematic diagram of the lower surface of the upper limit plate;

[0032] Figure 9A is a schematic diagram of the upper surface of the lower limit plate;

[0033] Figure 9B It is a schematic diagram of the lower surface of the lower limit plate.

[0034] Symbol Description 1 Weighing module

[0035] 2 tanks

[0036] 3 Limiting structure

[0037] 11 Top Plate

[0038] 12 bottom plate

[0039] 13 weighing sensor

[0040] 31 First limiting component 32 Second limiting component 33 First connecting piece

[0041] 311 upper limit plate

[0042] 312 lower limit plate

[0043] 313 Sliding Components

[0044] 314 through hole

[0045] 315 Sliding Parts

[0046] 316 base

[0047] 317 receiving slot

[0048] 318 Thinning Groove

[0049] 319 marker slot

[0050] 321 upper limit block

[0051] 322 lower limit block

[0052] 323 tie rod assembly

[0053] 324 First thinning area 326 Second thinning area 3140 Step hole 330 Step structure DETAILED DESCRIPTION

[0054] The present invention is further described below in conjunction with specific embodiments and accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0055] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0056] The weighing module 1 is a weighing device designed to ensure that the weighing sensor can maximize its metering performance. It usually includes a top plate 11, a bottom plate 12, a weighing sensor 13 and other accessories. It is usually used for static or dynamic weighing of material tanks, such as silos, hoppers, reactors and other equipment.

[0057] Tank 2 is positioned above weigh module 1, allowing for feeding from above. Weigh module 1 is located below the tank for weighing. Typically, the module's top plate 11 is fixedly connected to the tank's legs or lugs above, while the bottom plate 12 is connected to the foundation. It will be appreciated that in some embodiments, "fixed connection" here includes indirectly connecting top plate 11 to the tank, for example, by using an adapter to securely connect top plate 11 to tank 2 (or tank legs, lugs, etc.).

[0058] During the weighing process, the weighing tank experiences thermal expansion and contraction, or horizontal displacement, which can cause the top plate 11 of the weighing module to expand and displace, affecting accuracy. For example, reactors in the pharmaceutical industry often operate at high temperatures. The high temperatures can cause the tank to expand and deform outward, driving the module's top plate 11 outward. This can cause the sensor or force-introducing components to tilt outward along with the top plate 11, resulting in a decrease in sensor performance.

[0059] To address this problem, the present invention proposes a limiting structure to prevent the top plate 11 from expanding and displacing along a first direction X, thereby ensuring measurement accuracy. The first direction includes but is not limited to the radial direction of the tank.

[0060] Reference Figures 1 to 5 It is understood that the limiting structure 3 is installed on the weighing module 1 , and the limiting structure 3 is used to limit the movement of the top plate 11 along the first direction X.

[0061] The limiting structure 3 includes a first limiting assembly 31 disposed between the material tank 2 and the weighing module 1. The first limiting assembly 31 includes an upper limiting plate 311, a lower limiting plate 312, and a sliding assembly 313. The lower limiting plate 312 faces the upper limiting plate 311 and is connected to the upper limiting plate 311 via a first connecting member 33, and is fixedly connected to the top plate 11 of the weighing module 1 via a second connecting member 34 such as a screw. Figure 4 As shown, the upper limit plate 311 is fixedly connected to the tank 2 by a third connecting member 35 such as a screw. The sliding assembly 313 is arranged between the upper limit plate 311 and the lower limit plate 312 to allow the upper limit plate 311 and the lower limit plate 312 to move relative to each other along the first direction.

[0062] The lower limit plate 312 includes a through hole 314 that cooperates with the first connecting member 33. Figure 1As shown, in some embodiments, the through hole 314 is strip-shaped, with its length direction being the first direction X, to allow the first connector 33 to move relative to the lower limit plate 312 in the first direction, thereby allowing relative movement in the first direction between the lower limit plate 312 and the upper limit plate 311. For example, the first connector 33 passes through the through hole 314 and connects to the threaded hole of the upper limit plate 311, but is not pressed against the lower limit plate 312, ensuring that the first connector 33 can move along the first direction together with the upper limit plate 311. As a result, the upper and lower parts of the first limit assembly 31 are fixedly connected to the material tank 2 and the weighing module 1, respectively, but the upper limit plate 311 and the lower limit plate 312 can slide relative to each other.

[0063] Furthermore, the through hole 314 may also be configured to limit the movement of the first connecting member 33 in a second direction Y perpendicular to the first direction X.

[0064] In some embodiments, reference Figure 9B and Figure 1 As shown, the through hole 314 includes a stepped hole 3140, and the stepped hole 3140 includes a first part 3141 and a second part 3142. The second part 3142 is close to the side of the top plate 11, and the first part 3141 is close to the side of the upper limit plate 311. The first part 3141 has a first aperture, and the second part 3142 has a second aperture, and the second aperture is larger than the first aperture. The column of the first connecting member 33 includes a stepped structure 330, and the stepped structure 330 includes a thick part 332 that cooperates with the second part 3142 and a thin part 331 that cooperates with the first part 3141. The stepped hole 3140 cooperates with the stepped structure 330 of the first connecting member 33 to play an anti-overturning role and prevent the upper limit plate 311 and the lower limit plate 312 from separating in the vertical direction (Z direction).

[0065] The sliding assembly 313 is arranged between the upper limit plate 311 and the lower limit plate 312, and includes a sliding member 315 and a bottom bracket 316 for supporting the sliding member 315. The sliding member 315 and the bottom bracket 316 are respectively arranged on one side and the other side of the upper limit plate 311 and the lower limit plate 312.

[0066] For example, the bottom bracket 316 is disposed on the lower limit plate 312, and the lower limit plate 312 is provided with a receiving groove 317 that is embedded in the bottom bracket 316. The sliding direction of the sliding member 315 is the first direction X, allowing the upper limit plate 311 and the lower limit plate 312 to move relative to each other along the first direction X but preventing movement in other directions, thereby absorbing the load in the first direction to limit the movement of the top plate 11 of the weighing module along the first direction.

[0067] The sliding member 315 includes, but is not limited to, rollers, balls, and other structures, and has a curved surface that mates with the base 316. It is preferably constructed of a high-hardness, low-friction material, such as martensitic stainless steel or precipitation-hardened martensitic stainless steel, which has undergone heat treatment or surface heat treatment, or a high-hardness, low-friction material such as ceramic or phenolic. The lower area of ​​the upper or lower limit plate 311, 312, where it contacts the sliding member 315, is hardened to enhance surface strength and reduce friction during contact and sliding with the sliding member 315, thereby improving contact and reliability.

[0068] In some embodiments, the area where the upper limit plate or the lower limit plate contacts the sliding member is provided with a thinning groove extending along the first direction. Figure 4 and Figure 8 In the illustrated embodiment, a thinning groove 318 extending along a first direction is provided in the area where the lower side of the upper limit plate 311 contacts the sliding member 315 to minimize the gap between the upper limit plate 311 and the lower limit plate 312. A smaller gap can prevent dust from entering.

[0069] Figure 4 and Figure 5 The upper limit plate 311 and the lower limit plate 312 are shown in a non-slip state. To facilitate inspection and adjustment, the upper limit plate 311 and the lower limit plate 312 are respectively provided with a marking groove 319 on their sides. The marking groove is set to align in the vertical direction when the upper limit plate 311 and the lower limit plate 312 do not move relative to each other. Figure 5 As shown. When the tank expands due to heat, the tank legs drive the upper limit plate 311 to slide, causing the upper limit plate 311 to slide relative to the lower limit plate 312, while the lower limit plate 312 and the top plate 11 connected to it remain stationary. Figure 7 As shown, the two marking grooves are misaligned, indicating the amount of slip of the upper limit plate 311 .

[0070] Furthermore, the limiting structure also includes a second limiting assembly 32 disposed between the top plate 11 and the bottom plate. The second limiting assembly 32 includes an upper limiting block 321, a lower limiting block 322, and a pull rod assembly 323. The upper limiting block 321 and the lower limiting block 322 serve as adapters for fixing the pull rod assembly 323 to the weighing module 1. The upper limiting block 321 and the lower limiting block 322 are respectively fixedly connected to the top plate 11 and the bottom plate 12 by fasteners such as screws. The pull rod assembly 323 is fixedly connected to the upper limiting block 321 and the lower limiting block 322 by connecting screws.

[0071] The pulling direction of the rod assembly 323 is the first direction X, thereby constraining the displacement between the top plate 11 and the bottom plate 12 along the first direction and limiting deformation of the weighing module. The rod assembly 323 can be made of standard parts to facilitate adjustment of small gaps.

[0072] In some embodiments, the length direction Y of the upper limit block 321 and the lower limit block 322 is perpendicular to the first direction X, and at least two pull rod assemblies 323 are distributed on both sides along the length direction thereof, preferably symmetrically.

[0073] The upper limit block 321 and the lower limit block 322 are also provided with a weight reduction structure to reduce the overall weight of the assembly, for example, by providing a hole structure or thinning the local area, such as Figure 1 In the illustrated embodiment, a first thinned region 324 is provided above the upper limit block 321, and a second thinned region 326 is provided below the upper limit block 321. The first thinned region 324 includes a plurality of sidewalls 3240 and a thinned area defined by the sidewalls, and also serves to position the top plate 11. The sidewalls 3240 of the first thinned region 324 can also share the horizontal load from the top plate 11. In particular, the sidewalls in the +x direction can share the horizontal load from the first direction, thereby preventing the entire horizontal load from being concentrated on the second connector.

[0074] The first limit assembly 31 is secured to the top plate by a second connector and to the top plate by a third connector. After the second limit assembly 32 is secured to the top and bottom plates, a horizontal tie rod assembly can be used to pre-adjust the radial clearance to ensure the initial working point. When the tank experiences radial deformation due to thermal expansion and contraction, the upper limit block 321, lower limit block 322, and horizontal tie rod assembly 323 constrain the tank in the first direction. However, due to the structure of the sliding assembly 313 of the first limit assembly 31, the deformation of the tank body in the first direction is not constrained and will not affect the tank body. The load in the first direction is transferred to the relative movement between the upper limit plate 311 and the lower limit plate 312 by means of the sliding member 315 and the bottom bracket 316 between them. The sliding member 315 and the bottom bracket 316 are made of a low-friction material with a very low friction coefficient, ensuring that the upper and lower limit plates can deform freely in the radial direction.

[0075] The above structure is convenient to connect and has wide adaptability, and is applicable to all types of weighing modules. It only requires threading the limit components with the top plate and bottom plate of the module without changing the original design of the module. The parts are simple, the processing is convenient, and there is no complicated structural design.

[0076] Combined with the introduction of the above-mentioned limiting structure, it can also be understood that a weighing component includes a material tank 2 and a plurality of weighing modules 1 arranged annularly at the bottom of the supporting material tank. Figure 3 A top view of the material tank 2 and the weighing module 1 is shown. The material tank includes but is not limited to structures such as a hopper and a reactor.

[0077] In order to ensure that the weighing module can perform its functions, the traditional weighing module is equipped with a horizontal limit mechanism to limit the tangential B movement, such as the horizontal pull rod or limit block used in the tank weighing system with stirring, but lacks constraints in the radial A direction.

[0078] The aforementioned limiting structure is applied to the weighing component, with the first direction set to radial. This structure does not constrain the relative radial displacement of the tank 2 or the tank legs and the top plate 11. While allowing for thermal expansion and contraction or radial horizontal displacement of the tank, it effectively limits radial displacement between the top plate 11 and bottom plate 12 of the weighing module 1, ensuring both the weighing module's measurement accuracy and the tank's safety.

[0079] It should be noted that the use of terms such as "first" and "second" in the above introduction to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and do not represent the primary and secondary, and therefore cannot be understood as limiting the scope of protection of this application.

[0080] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0081] Although the present invention is disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A limit structure installed on a weighing module, wherein the upper portion of the weighing module is used to support the material tank. The weighing module includes a top plate, a bottom plate, and a weighing sensor located therebetween. The limit structure is used to limit the movement of the top plate along a first direction, and is characterized in that: The limiting structure includes: The first limiting assembly is provided between the material tank and the weighing module, and includes: An upper limit plate, used for fixed connection with the material tank; a lower limit plate, movably connected to the upper limit plate and fixedly connected to the top plate; and A sliding assembly is provided between the upper limit plate and the lower limit plate to allow the upper limit plate and the lower limit plate to move relative to each other along the first direction.

2. The limiting structure according to claim 1, characterized in that: The lower limit plate is connected to the upper limit plate through a first connecting member. The lower limit plate includes a through hole that cooperates with the first connecting member. The through hole has a length direction extending along the first direction to allow the first connecting member to move relative to the lower limit plate along the first direction.

3. The limiting structure according to claim 2, characterized in that: The through hole is further configured to limit the movement of the first connecting member in a second direction perpendicular to the first direction.

4. The limiting structure according to claim 2, characterized in that: The column of the first connecting member includes a step structure, and the through hole includes a step hole for matching with the step structure.

5. The limiting structure according to claim 1, characterized in that: The sliding assembly includes a sliding member and a base for carrying the sliding member. The sliding member and the base are respectively arranged on one side and the other side of the upper limit plate and the lower limit plate. The sliding direction of the sliding member is the first direction.

6. The limiting structure according to claim 5, characterized in that: A thinning groove extending along a first direction is provided in a region where the upper limit plate or the lower limit plate contacts the sliding member, so as to reduce a gap between the upper limit plate and the lower limit plate.

7. The limiting structure according to claim 5, characterized in that: The area where the upper limit plate or the lower limit plate contacts the sliding member is a hardened surface.

8. The limiting structure according to claim 5, characterized in that: The sliding member and the base are made of ceramic material, phenolic material or stainless steel.

9. The limiting structure according to claim 5, characterized in that: The bottom bracket is arranged on the lower limiting plate, and the lower limiting plate is provided with a receiving groove for receiving the bottom bracket.

10. The limiting structure according to claim 1, characterized in that: The lower limiting plate is fixedly connected to the top plate via a second connecting member.

11. The limiting structure according to claim 1, characterized in that: The limiting structure further includes a second limiting component disposed between the top plate and the bottom plate, the second limiting component including: an upper limit block, fixedly connected to the top plate; a lower limit block, fixedly connected to the base plate; and A pull rod assembly is connected to the upper limit block and the lower limit block, and the pulling direction of the pull rod assembly is the first direction to constrain the relative displacement of the top plate and the bottom plate along the first direction.

12. The limiting structure according to claim 11, characterized in that: The upper limit block is connected to the top plate and the lower limit plate through a second connecting piece.

13. The limiting structure according to claim 11, characterized in that: The length directions of the upper limit block and the lower limit block are perpendicular to the first direction, and at least two pull rod assemblies are distributed on both sides along the length direction thereof.

14. The limiting structure according to claim 11, characterized in that: The upper limit block is provided with a first thinning area, which includes a side wall and a thinning zone defined by the side wall to position the top plate.

15. The limiting structure according to claim 1, characterized in that: The side surfaces of the upper limit plate and the lower limit plate are respectively provided with marking grooves, and the marking grooves are configured to be aligned in a vertical direction when the upper limit plate and the lower limit plate do not move relative to each other.

16. A weighing device comprising a top plate, a bottom plate and a weighing sensor located therebetween, characterized in that: It also includes the limiting structure according to any one of claims 1-15.

17. A weighing component comprising a carrying tank and a plurality of weighing modules arranged circumferentially at the bottom of the carrying tank, characterized in that: It also includes the limiting structure according to any one of claims 1 to 15, wherein the first direction is a radial direction of the supporting tank.

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