Anti-falling mechanism for scale pan of balance

Abstract

The utility model discloses an anti-falling mechanism for a scale pan of a balance. The anti-falling mechanism comprises the scale pan, a windproof ring base and a windproof ring. The scale pan is arranged on the balance, the windproof ring base is fixed on the balance and surrounds the scale pan, and the windproof ring is sleeved outside the windproof ring base. The windproof ring base is of a vertical hollow stepped annular structure, a first annular gap is formed between the windproof ring and the scale pan, a second annular gap is formed between the windproof ring and the windproof ring base, and the two gaps form a continuous guide channel. The windproof ring is detachably connected with the windproof ring base through the positioning supporting columns and the clamping grooves. When the powder is scattered, the powder passes through the annular gap guide channel and is discharged under the action of gravity, and is prevented from entering the balance. The utility model has the advantages of simple structure and convenient installation, effectively prevents powder from entering the balance, improves the weighing accuracy and the service life, and has obvious practical value.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental instrument and equipment, in particular to a mechanism for preventing material from falling off a balance pan. Background Art

[0002] In sample weighing equipment, a balance is a crucial core component. However, when weighing powders with existing balances, there is often a problem that the powders fall off and enter the interior of the balance through the gap between the balance pan and the wind guard ring, resulting in damage to the balance. Existing technologies have tried to improve the design of the wind guard ring, such as reducing the gap and setting up a dust collection box, etc., to reduce the infiltration of powders, but the effect is limited. These solutions can only provide limited protection and cannot completely solve the problem of powder leakage. In addition, existing protection measures usually affect the operation convenience, increase the cleaning difficulty, and thus reduce the work efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a mechanism for preventing material from falling off a balance pan, which solves the problem in the prior art that powders fall off and enter the interior of the balance through the gap between the balance pan and the wind guard ring, resulting in damage to the balance.

[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a mechanism for preventing material from falling off a balance pan, including a balance pan, which is supported on the balance by a weighing connecting piece; a wind guard ring base, which is fixed on the balance and arranged around the balance pan; the lower end of the wind guard ring base is fixed on the balance, and the upper end is lower than the bottom of the balance pan, and the outer diameter of the upper end ring of the wind guard ring base is smaller than the outer diameter of the balance pan; a wind guard ring, which is sleeved outside the wind guard ring base; wherein, the inner diameter of the wind guard ring is larger than the outer diameter of the balance pan, and a first annular gap is formed between the wind guard ring and the balance pan; a second annular gap is formed between the wind guard ring and the wind guard ring base; the first annular gap and the second annular gap form a continuous guiding channel, which leads from the outside of the balance pan to the outside of the wind guard ring base.

[0005] Preferably, the wind guard ring base is a hollow annular structure, and its annular circumferential surface is stepped in the vertical direction.

[0006] Preferably, the wind guard ring base includes an annular bottom plate and an annular side wall, and the annular side wall is successively an upper annular outer wall, an annular inclined surface and a lower annular outer wall from top to bottom, and the upper annular outer wall and the lower annular outer wall are perpendicular to the bottom plate.

[0007] Preferably, the wind guard ring is a hollow annular cylindrical structure, its inner diameter is larger than the outer diameter of the upper annular outer wall of the wind guard ring base, and the lower end extends to the inclined surface corner of the upper annular outer wall and the annular inclined surface of the wind guard ring base.

[0008] Preferably, a positioning structure is further included for defining the position of the wind shield relative to the wind shield base.

[0009] Preferably, the positioning structure includes a plurality of support columns arranged at the lower end of the wind shield, and the wind shield is supported and connected to the wind shield base through the support columns.

[0010] Preferably, a clamping groove is provided at the lower end of the positioning support column, and the clamping groove is connected to the junction of the annular inclined surface and the lower annular outer wall of the wind shield base.

[0011] Preferably, the weighing pan is not in contact with the wind shield and the wind shield base.

[0012] Advantages

[0013] The anti-falling mechanism of the weighing pan of the present utility model has the following advantages:

[0014] First, by providing a wind shield base surrounding the weighing pan and a wind shield sleeved outside the wind shield base on the balance, two annular gaps are formed: the first annular gap between the weighing pan and the wind shield, and the second annular gap between the wind shield and the wind shield base. These two gaps are interconnected to form a continuous guiding channel leading from the outside of the weighing pan to the outside of the wind shield base. When the powder on the weighing pan spills, it will first fall into the second annular gap through the first annular gap, and then under the action of gravity, it will be discharged along the annular gap to the outside of the wind shield base, effectively preventing the powder from entering the balance, improving the weighing accuracy and the service life of the balance. At the same time, this design is also convenient for cleaning and maintenance, improving work efficiency.

[0015] Second, the wind shield base adopts a hollow annular structure and is stepped vertically, including an upper annular outer wall, an annular inclined surface, and a lower annular outer wall arranged in sequence from top to bottom; the wind shield adopts a hollow annular cylindrical structure, and its lower end extends to the corner of the upper annular outer wall and the annular inclined surface of the wind shield base; the design of these structures ensures the reservation and connectivity of the annular gap, further improving the efficiency of the anti-falling mechanism for discharging powder.

[0016] Third, it includes a plurality of support columns arranged at the lower end of the wind shield, and a clamping groove at the lower end of the support column connected to the junction of the annular inclined surface and the lower annular outer wall of the wind shield base. This positioning connection method not only precisely controls the relative position between the wind shield and the wind shield base, ensures the reservation of the annular gap between the two, but also greatly facilitates the disassembly and cleaning of the wind shield, enabling it to flexibly adapt to different weighing requirements. Description of the Drawings

[0017] Figure 1 is the front view of the present utility model;

[0018] Figure 2This is the side view of the present utility model;

[0019] Figure 3 This is the top view of the present utility model;

[0020] Reference numerals: 1, balance; 2, weighing pan; 3, base of wind shield ring; 4, wind shield ring; 5, support column; 6, upper annular outer wall; 7, annular inclined surface; 8, lower annular outer wall; 9, weighing connecting piece. Detailed implementation manners

[0021] Next, the present utility model will be specifically described through exemplary implementation manners; however, it should be understood that, without further narration, the elements, structures and features in one implementation manner can also be beneficially combined into other implementation manners.

[0022] It should be noted that: unless otherwise defined, the technical terms or scientific terms used herein should have the ordinary meanings understood by those with ordinary skills in the field to which the present utility model belongs; the words such as "a", "an" or "the" used in the specification and claims of the present utility model patent application do not express a limitation of quantity, but mean that there is at least one; the "first", "second" and "third" used herein should not be regarded as a limitation on the order of components, but only for distinguishing different components; the words such as "including" or "comprising" indicate that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, but do not exclude other elements or objects with the same functions.

[0023] Next, a powder falling prevention mechanism for a balance weighing pan will be described in detail with reference to the accompanying drawings.

[0024] As Figures 1 to 3 shown, the present utility model provides a powder falling prevention mechanism for a balance weighing pan, including a weighing pan 2, a base of wind shield ring 3 and a wind shield ring 4.

[0025] Among them, the weighing pan 2 is supported on the tabletop of the balance 1 through a weighing connecting piece 9. The weighing pan 2 adopts a disc-shaped structure and is used for holding the powder sample to be weighed.

[0026] The wind shield base 3 is fixed on the balance 1 and is arranged around the weighing pan 2. The wind shield base 3 adopts a hollow annular structure, and its annular circumferential surface is stepped in the vertical direction. The lower end of the wind shield base 3 is fixed on the balance 1, the upper end is lower than the bottom of the weighing pan 2, and the outer diameter of the upper end ring is smaller than the outer diameter of the weighing pan 2. This structural design can ensure that the area of the weighing pan 2 is larger than the area of the annular section at the upper end of the wind shield base 3; and the weighing pan 2 does not contact the wind shield 4 and the wind shield base 3. Such a structural design forms a first annular gap between the weighing pan 2 and the wind shield 4, and at the same time ensures that an annular gap can be reserved between the weighing pan 2 and the wind shield 4 so that the powder can pass through the weighing pan 2.

[0027] The wind shield base 3 includes an annular bottom plate and an annular side wall perpendicular to the bottom plate. The annular side wall is successively an upper annular outer wall 6, an annular inclined surface 7, and a lower annular outer wall 8 leading to the outside of the base from top to bottom. Among them, the upper annular outer wall 6 and the lower annular outer wall 8 are perpendicular to the bottom plate, and the annular inclined surface 7 connects the upper annular outer wall 6 and the lower annular outer wall 8, playing a role of transition and guidance.

[0028] The wind shield 4 adopts a hollow annular cylindrical structure, and its inner diameter is larger than the outer diameter of the upper annular outer wall 6 of the wind shield base 3. The lower end of the wind shield 4 extends to the inclined surface corner of the upper annular outer wall 6 and the annular inclined surface 7 of the wind shield base 3, and a second annular gap is formed between the wind shield 4 and the wind shield base 3. Such a structural design reserves an annular gap between the wind shield 4 and the wind shield base 3, and the first annular gap and the second annular gap are connected to form a guiding channel for discharging powder.

[0029] A plurality of struts 5 are provided at the lower end of the wind shield 4, and clamping grooves are provided at the lower ends of the struts 5. The wind shield 4 is connected to the junction of the annular inclined surface 7 and the lower annular outer wall 8 of the wind shield base 3 through the clamping grooves on the struts 5, realizing fast and reliable positioning connection. This connection method facilitates the loading, unloading and cleaning of the wind shield 4.

[0030] During the weighing process, the powder sample may spill from the weighing pan 2. The spilled powder will first pass through the first annular gap between the weighing pan 2 and the wind shield 4, and then fall into the second annular gap between the wind shield 4 and the wind shield base 3. Due to the stepped structural design of the wind shield base 3, the powder falling into the second annular gap will flow along the annular inclined surface 7 to the lower annular outer wall 8 under the action of gravity, and finally be discharged outside the wind shield base 3. This design cleverly utilizes the principle of gravity to realize the effective guiding and discharging of powder and prevent it from entering the balance 1.

[0031] After the weighing is completed, the wind shield 4 can be disassembled as needed to clean it and the wind shield base 3 to ensure the accuracy of the next weighing. The detachable connection design of the above-mentioned positioning pillars and slots between the wind shield 4 and the wind shield base 3 not only facilitates cleaning, but also can flexibly adjust the gap between the two according to different models of balances to meet the weighing requirements of different powders.

Claims

1. A mechanism for preventing material from falling off a balance scale pan, characterized in that: It includes a scale pan (2), which is supported on a balance (1) by a weighing connecting piece (9); An air draft prevention ring base (3), which is fixed on the balance (1) and arranged around the scale pan (2); the lower end of the air draft prevention ring base (3) is fixed on the balance (1), the upper end is lower than the bottom of the scale pan (2), and the outer diameter of the upper end ring of the air draft prevention ring base (3) is smaller than the outer diameter of the scale pan; An air draft prevention ring (4), which is sleeved outside the air draft prevention ring base; wherein, the inner diameter of the air draft prevention ring (4) is larger than the outer diameter of the scale pan (2), and a first annular gap is formed between the air draft prevention ring (4) and the scale pan (2); a second annular gap is formed between the air draft prevention ring (4) and the air draft prevention ring base (3); the first annular gap and the second annular gap form a continuous guiding channel, which leads from the outside of the scale pan (2) to the outside of the air draft prevention ring base.

2. The anti-falling mechanism for the balance scale pan according to claim 1, characterized in that, The air draft prevention ring base (3) is a hollow annular structure, and its annular circumferential surface is stepped in the vertical direction.

3. The anti-falling material mechanism for a balance scale pan according to claim 2, wherein, The air draft prevention ring base (3) includes an annular bottom plate and an annular side wall, and the annular side wall is successively an upper annular outer wall (6), an annular inclined surface (7) and a lower annular outer wall (8) from top to bottom, and the upper annular outer wall and the lower annular outer wall are perpendicular to the bottom plate.

4. The anti-falling mechanism for the balance scale pan according to claim 3, characterized in that, The air draft prevention ring (4) is a hollow annular cylindrical structure, its inner diameter is larger than the outer diameter of the upper annular outer wall (6) of the air draft prevention ring base (3), and the lower end extends to the inclined surface corner of the upper annular outer wall and the annular inclined surface of the air draft prevention ring base (3).

5. The anti-falling material mechanism for a balance scale pan according to claim 4, characterized in that, It further includes a positioning structure for defining the position of the air draft prevention ring (4) relative to the air draft prevention ring base (3).

6. The anti-falling material mechanism for a balance scale pan according to claim 5, characterized in that, The positioning structure includes a plurality of pillars arranged at the lower end of the air draft prevention ring (4), and the air draft prevention ring (4) is supported and connected to the air draft prevention ring base (3) through the pillars.

7. The anti-falling material mechanism of a balance scale pan according to claim 6, characterized in that A clamping groove is provided at the lower end of the pillar, and the clamping groove is connected to the junction of the annular inclined surface and the lower annular outer wall of the air draft prevention ring base (3).

8. A weighing scale pan anti-falling mechanism according to claim 1, characterized in that, The scale pan (2) is not in contact with the air draft prevention ring (4) and the air draft prevention ring base (3).

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