Online weighing system

Abstract

The utility model discloses an on-line weighing system, which is arranged in an isolator and comprises a weighing assembly used for weighing a product to be weighed and side wind blocking pieces, and the side wind blocking pieces are oppositely arranged on two sides of the weighing assembly and used for blocking return wind of inner-layer flow wind of the isolator. According to the utility model, the two sides of the weighing assembly are provided with the side wind shielding members, when the laminar flow air returns, the pressure of the return air does not act on the weighing assembly from the side surface, and the side wind shielding members can enable the weighing fluctuation of the weighing assembly to be reduced to about 2mg, thereby solving the technical problems in the prior art that the weighing fluctuation of the weighing assembly is about 10mg, and the weighing precision is not enough.

Description

Technical Field

[0001] The utility model relates to the technical field of isolators, in particular to an online weighing system. Background Art

[0002] The isolator mechanism in the pharmaceutical production line solves the potential harm of the medicine bottle to the operator and realizes the isolation of the operator and the operating environment. At present, there is a need to weigh the medicine bottle online in the isolator. The schematic diagram of the position of the online weighing system 2 and the isolator 1 is shown in the figure. Figure 1 and 2 As shown, the isolator 1 has a return air duct 11, and the return air duct 11 has a plurality of return air ports 111. The return air ports 111 are arranged around the online weighing system 2. After the laminar air is blown vertically from the top to the working surface, the air is returned from the return air ports 111 on the side and discharged to the outside of the isolator through the return air duct 11. Figure 1 and 2 The direction indicated by the arrow is the laminar wind flow direction.

[0003] Today, with the increasing requirements for drug quality, there is an increasing demand for filling equipment to be equipped with weighing functions. The weighing accuracy is required to be between ±1% and ±3%. However, the commonly used weighing sensor is a highly accurate weight measuring instrument. Slight changes will cause fluctuations in the weighing value. In the isolator mechanism, there is laminar air flow, and the laminar air flow is required to be no less than 0.36m / s on the working surface. The weighing value of the weighing sensor fluctuates greatly under the influence of laminar air flow. In micro-filling, if the filling volume is required to be 100mg±3%, that is, the allowable error is -3mg~3mg, but the error of the weighing sensor under laminar air flow reaches 3-5mg. Even in some isolator models, the error of the weighing sensor itself under laminar air flow reaches 8-10mg, which makes the equipment unable to meet the loading accuracy during online weighing. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an online weighing system with high weighing accuracy.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] An online weighing system is located in an isolator and includes a weighing assembly for weighing a product to be weighed. The online weighing system also includes side wind shields, which are relatively arranged on both sides of the weighing assembly and are used to block laminar return air in the isolator.

[0007] Preferably, as a further improvement of the above technical solution:

[0008] The isolator comprises a return air duct, the return air duct comprises a return air port, and the side wind shield is located between the return air port and the weighing platform.

[0009] The online weighing system further comprises a conveying member, which is used to convey the product to be weighed to the weighing assembly for weighing.

[0010] The weighing assembly includes a weighing sensor and a weighing platform. A notch for installing the weighing platform is provided on the conveying member. The weighing sensor is located under the weighing platform and is used to weigh the product to be weighed on the weighing platform.

[0011] The weighing platform is a weighing support.

[0012] The online weighing system further comprises an upper wind shield, which is located above the weighing assembly and is used to block the laminar wind in the isolator.

[0013] The upper wind shield is a wind shield plate.

[0014] The wind shield is provided with a plurality of flow holes.

[0015] The upper wind shield is connected to the top of the side wind shield.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] The online weighing system of the utility model is provided with side wind shields on both sides of the weighing component. When the laminar air returns, the pressure of the return air will not act on the weighing component from the side. The side wind shields can reduce the fluctuation of the weighing of the weighing component to about 2 mg, thus solving the technical problem in the prior art that the fluctuation of the weighing of the weighing component is about 10 mg and the weighing accuracy is insufficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the location of the online weighing system in the isolator.

[0019] Figure 2 This is a schematic diagram of the location of the online weighing system in the isolator (from another perspective).

[0020] Figure 3 It is a structural diagram of the online weighing system.

[0021] Figure 4 It is a schematic diagram of the flow path of laminar return air.

[0022] Figure 5 It is a schematic diagram of the flow path of laminar wind.

[0023] The symbols in the figure represent:

[0024] 1. Isolator; 11. Return air duct; 111. Return air outlet; 2. Online weighing system; 21. Weighing sensor; 22. Weighing platform; 23. Products to be weighed; 24. Wind shield assembly; 241. Upper wind shield; 242. Side wind shield; 25. Conveying parts. DETAILED DESCRIPTION

[0025] The utility model will be described in further detail below. Unless otherwise specified, the instruments or materials used in the utility model are commercially available.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figures 1 to 5 As shown, an online weighing system of the utility model, the online weighing system 2 is located in the isolator 1, and includes a weighing assembly for weighing the product 23 to be weighed. The online weighing system 2 also includes side wind shields 242, which are relatively arranged on both sides of the weighing assembly and are used to block the laminar wind return air in the isolator 1. In the utility model, the side wind shields 242 are arranged on both sides of the weighing assembly. When the laminar wind returns, the pressure of the return air will not act on the weighing assembly from the side. The side wind shields 242 can reduce the fluctuation of the weighing of the weighing assembly to about 2 mg, which solves the technical problem that the fluctuation of the weighing of the weighing assembly in the prior art is about 10 mg and the weighing accuracy is not enough.

[0030] The isolator 1 includes a return air duct 11, the return air duct 11 includes a return air port 111, and the side wind shield 242 is located between the return air port 111 and the weighing platform 22. In this embodiment, the return air ports of the isolator 1 are arranged around the online weighing system, and the laminar air is blown vertically from the top to the working surface, and then the air is returned from the return air port on the side and discharged to the outside of the isolator 1 through the return air duct 11.

[0031] The online weighing system 2 further comprises a conveying member 25, which is used to convey the product 23 to be weighed to the weighing assembly for weighing.

[0032] The weighing assembly includes a weighing sensor 21 and a weighing platform 22 . A notch for installing the weighing platform 22 is provided on the conveying member 25 . The weighing sensor 21 is located under the weighing platform 22 and is used to weigh the product 23 to be weighed on the weighing platform 22 .

[0033] The weighing platform 22 is a weighing support. The weighing support is installed on the weighing sensor 21, and the product will fall on the weighing support when weighing.

[0034] The online weighing system also includes an upper windshield 241, which is located above the weighing assembly and is used to block the laminar wind in the isolator. The arrows in the figures 1 to 5 are the directions of the laminar wind flow paths. When the laminar wind blows downward, most of the pressure will first act on the upper windshield 241, and then act on the weighing support through the "decompression" of the upper windshield 241, so that the influence of the wind pressure symmetry head will be reduced exponentially.

[0035] The upper wind shield 241 is a wind shield plate.

[0036] A plurality of circulation holes are provided on the wind shield plate, and the circulation holes facilitate air flow.

[0037] The upper windshield 241 is connected to the top of the side windshield 242. The side windshield 242 and the upper windshield 241 are arranged on the side and top of the weighing support, which is equivalent to forming a "closed" space around the weighing support, so that the weighing support will not be disturbed by the laminar wind and produce fluctuations during the production process.

[0038] Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification 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 should fall within the scope of protection of the technical solution of the present invention.

Claims

1. An online weighing system, the online weighing system (2) being located in an isolator (1), comprising a weighing assembly for weighing a product to be weighed (23), characterized in that: The online weighing system (2) further comprises side wind shields (242), which are arranged on both sides of the weighing assembly relative to each other and are used to block laminar return air in the isolator (1).

2. The online weighing system according to claim 1, characterized in that: The isolator (1) comprises a return air duct (11), the return air duct (11) comprises a return air port (111), and the side wind shield (242) is located between the return air port (111) and the weighing platform (22).

3. The online weighing system according to claim 1 or 2, characterized in that: The online weighing system (2) further comprises a conveying member (25), wherein the conveying member (25) is used to convey the product (23) to be weighed to the weighing component for weighing.

4. The online weighing system according to claim 3, characterized in that: The weighing assembly comprises a weighing sensor (21) and a weighing platform (22); a notch for installing the weighing platform (22) is provided on the conveying member (25); the weighing sensor (21) is located under the weighing platform (22) and is used to weigh the product (23) to be weighed on the weighing platform (22).

5. The online weighing system according to claim 4, characterized in that: The weighing platform (22) is a weighing support.

6. The online weighing system according to claim 1 or 2, characterized in that: The online weighing system further comprises an upper wind shield (241), wherein the upper wind shield (241) is located above the weighing assembly and is used to block the laminar wind in the isolator.

7. The online weighing system according to claim 6, characterized in that: The upper wind shield (241) is a wind shield plate.

8. The online weighing system according to claim 7, characterized in that: The wind shield is provided with a plurality of flow holes.

9. The online weighing system according to claim 6, characterized in that: The upper wind shield (241) is connected to the top of the side wind shield (242).

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