pipette

Abstract

The utility model belongs to the technical field of feeding equipment relates to a sample adding device, including the material cylinder, the upper end dynamic sealing connection gear of material cylinder, the axial extension of gear stretches into the connecting portion inner hole of material cylinder, is provided with the material rod in the central hole of gear and is passed through, the lower end threaded connection plug of material rod, material rod can be axially elastic telescopic adjustment relative to gear to control the opening size and on-off of material cylinder discharge gate, the outer surface of axial extension is equipped with the locating ring groove, and the locating hole of connecting portion is provided with the adjusting spring, and the outer end of adjusting spring is adjusted and is limited through the locating screw, and the inner end of adjusting spring is pressed on the elastic ball, and the inside rolling fit of elastic ball is in the locating ring groove. The utility model product structure is reasonable and ingenious, and through the precision transmission of gear, material rod, plug and the elastic floating design of material rod system, can realize the high accuracy adjustment and reliable sealing of discharge gate.

Description

Technical Field

[0001] This utility model belongs to the field of feeding equipment technology and relates to a sampler. Background Technology

[0002] In the material conveying and batching processes of industries such as chemical, pharmaceutical, and food, feeders are a common feeding device widely used for quantitative feeding of powders, granules, and other materials. Existing feeders often employ screw propulsion or valve control structures, which suffer from problems such as complex structures, inflexible adjustments, and poor sealing. Especially in micro-volume or precision feeding processes, uneven discharge, leakage, or blockages are prone to occur, affecting production quality and efficiency.

[0003] While some feeders use spring-loaded or threaded adjustment methods to control the discharge port, they still suffer from problems such as low adjustment accuracy, slow response, easy wear, and sealing failure. Furthermore, traditional structures are prone to leaks due to component wear during frequent adjustments, leading to material waste and potential environmental pollution.

[0004] Therefore, there is an urgent need for a sampler with a reasonable structure, flexible adjustment, reliable sealing, and suitable for precision feeding, in order to solve the shortcomings of existing equipment in terms of discharge control and leakage prevention. Summary of the Invention

[0005] To address the aforementioned problems, this utility model provides a sample feeder that solves the issues of precise material feeding and material leakage at the discharge port.

[0006] According to the technical solution of this utility model: a sample dispenser, characterized in that: it includes a material cylinder, the upper end of which is dynamically sealed to a gear, the axial extension of the gear extends into the inner hole of the connecting part of the material cylinder, a material rod is installed through the center hole of the gear, the lower end of the material rod is threaded to a plug, and the material rod can be elastically extended and retracted relative to the gear in the axial direction to control the opening size and on / off state of the material cylinder outlet. The outer surface of the axial extension is provided with a positioning ring groove, and an adjusting spring is provided in the positioning hole of the connecting part. The outer end of the adjusting spring is adjusted and limited by a positioning screw, and the inner end of the adjusting spring is pressed against the ball. The inner side of the ball rolls in the positioning ring groove. The lower end of the connecting part is provided with an arch-breaking feeding structure, which is sleeved on the material rod to break up the arches and feed the material in the cylinder.

[0007] As a further improvement of this utility model, the arch-breaking feeding structure includes an arch-breaking plate, a sleeve part and a spiral feeding part that are integrally connected. The arch-breaking plate is fixedly connected to the axial extension part. The surface of the sleeve part is provided with axially extending blades. The spiral feeding part is located in the lower cylinder of the material cylinder.

[0008] As a further improvement of this utility model, a feeding port is provided on the side of the material cylinder.

[0009] As a further improvement of this utility model, a feeding port is provided at the top of the material cylinder.

[0010] As a further improvement of this utility model, the toothed portion of the gear is disposed at the top of the axial extension portion.

[0011] As a further improvement of this utility model, the connecting part is provided with a sealing groove, and a sealing ring is provided in the sealing groove. The sealing ring achieves the sealing between the inner wall of the connecting part and the axial extension part.

[0012] As a further improvement of this utility model, an upper spring is sleeved on the upper part of the material rod, the upper end of the upper spring is pressed against the first limiting plate at the upper end of the material rod, and the lower end of the upper spring is pressed against the top surface of the axial extension.

[0013] As a further improvement of this utility model, a second limiting plate is also provided at the top of the material rod, and a material picking control station is formed between the first limiting plate and the second limiting plate.

[0014] As a further improvement of this utility model, the material cylinder includes a material hopper section, the lower end of which is integrally connected to the discharge cylinder, and the upper end of which is integrally connected to the connecting section.

[0015] As a further improvement of this utility model, a positioning protrusion is provided on the lower surface of the material cylinder.

[0016] The technical advantages of this utility model are as follows: The product has a reasonable and ingenious structure. Through the precision transmission of gears, a feed rod, and a plug, and the elastic floating design of the feed rod system, it can achieve high-precision adjustment and reliable sealing of the discharge port. The opening of the plug can be precisely controlled by rotating gears, enabling precise feeding of materials from trace amounts to constant quantities. Spring force ensures that the plug always presses firmly against the discharge port, fundamentally solving the problem of material leakage in both static and running states. A unique ball bearing positioning mechanism ensures smooth rotation and accurate positioning, enhancing vibration resistance and extending service life. It also features a dynamic seal, resulting in a compact overall structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the internal structure.

[0019] Figure 3 This is a schematic diagram of the structure of the second embodiment of the present invention.

[0020] Figure 4 for Figure 3A schematic diagram of the internal structure. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0023] Figure 1-4 The components include a material cylinder 10, a hopper section 11, a discharge cylinder 12, a connecting section 13, a positioning screw 14, an adjusting spring 15, a ball bearing 16, a feeding port 17, a positioning protrusion 18, a gear 30, an upper spring 21, a spiral feeding section 22, a plug 23, a first limiting plate 24, a second limiting plate 25, a gear 30, an axial extension section 31, a positioning ring groove 32, an arch-breaking piece 33, and a sealing ring 40.

[0024] like Figure 1-4 As shown, this utility model is a sample dispenser, including a material cylinder 10. The upper end of the material cylinder 10 is dynamically sealed to a gear 30. The axial extension 31 of the gear 30 extends into the inner hole of the connecting part 13 of the material cylinder 10. A material rod 20 is installed through the central hole of the gear 30. The lower end of the material rod 20 is threaded to a plug 23. The material rod 20 can be axially elastically extended and retracted relative to the gear 30 to control the opening size and on / off state of the material cylinder 10 outlet.

[0025] The outer surface of the axial extension 31 is provided with a positioning ring groove 32, and an adjusting spring 15 is provided in the positioning hole of the connecting part 13. The outer end of the adjusting spring 15 is adjusted and limited by the positioning screw 14, and the inner end of the adjusting spring 15 is pressed against the ball 16. The inner side of the ball 16 is rolled in the positioning ring groove 32.

[0026] The lower end of the connecting part 13 is provided with an arch-breaking feeding structure, which is sleeved on the material rod 20 to break the arch and feed the material in the material cylinder 10.

[0027] The arch-breaking feeding structure includes an integrally connected arch-breaking plate 33, a sleeve part 34, and a spiral feeding part 22. The arch-breaking plate 33 is fixedly connected to the axial extension part 31. The surface of the sleeve part 34 is provided with axially extending blades. The spiral feeding part 22 is disposed in the lower cylinder of the material cylinder 10.

[0028] like Figure 1 , 2As shown, in the first embodiment of this utility model, a feeding port 17 is provided on the side of the material cylinder 10.

[0029] like Figure 3 , 4 As shown, in the second embodiment of this utility model, a feeding port 17 is provided at the top of the material cylinder 10.

[0030] The toothed portion of the gear 30 is located at the top of the axial extension 31.

[0031] The connecting part 13 is provided with a sealing groove, and a sealing ring 40 is provided in the sealing groove. The sealing ring 40 achieves the sealing between the inner wall of the connecting part 13 and the axial extension part 31.

[0032] An upper spring 21 is sleeved on the upper part of the material rod 20. The upper end of the upper spring 21 is pressed against the first limiting plate 24 at the upper end of the material rod 20, and the lower end of the upper spring 21 is pressed against the top surface of the axial extension 31.

[0033] A second limiting plate 25 is also provided at the top of the material rod 20, and a material picking control station is formed between the first limiting plate 24 and the second limiting plate 25.

[0034] The material cylinder 10 includes a material hopper section 11, the lower end of which is integrally connected to the discharge cylinder 12, and the upper end of which is integrally connected to the connecting section 13. The lower end of the material hopper section 11 is conical in shape, and the lower end of the material hopper section 11 is smoothly connected to the discharge cylinder 12.

[0035] A positioning protrusion 18 is provided on the lower surface of the material cylinder 10.

[0036] like Figure 1-4 As shown, the working process of the sample feeder of this utility model is as follows: In the initial state, under the pre-tightening force of the upper spring 21, the plug 23 at the lower end of the feed rod 20 is tightly fitted with the conical opening of the discharge cylinder 11 to close the discharge port and prevent leakage.

[0037] When sample addition is required, the lowering rod 20 moves the plug 23 downward, opening the discharge port. An external drive device (such as a motor) then drives the gear 30 to rotate. Because the gear 30 is dynamically sealed to the connecting part 13 via its axial extension 31, and achieves circumferential positioning and axial limiting through the rolling engagement of the ball bearing 16 and the positioning ring groove 32, the rotational motion of the gear 30 is smoothly transmitted. The rotation of the gear 30 drives the arch-breaking feeding structure to rotate synchronously, achieving spiral compression feeding. In specific operation, this includes fast feeding and slow feeding. During fast feeding, the discharge port opening is large; during slow feeding, the discharge port opening is small.

[0038] Since the lower end of the feed rod 20 is fixed to the plug 23 by a threaded connection, when the plug 23 moves downward, a gap is formed between the plug 22 and the discharge port. The material is discharged from the discharge port by the gear 30 driving the arch-breaking feeding structure to rotate. By precisely controlling the axial displacement of the plug 23, the opening size of the discharge port can be precisely adjusted to achieve precise feeding of the material.

[0039] During the sample feeding process, the feed rod 20 can axially and elastically float within a small range relative to the gear 30. The upper spring 21 provides the necessary elastic clamping force for the feed rod 20 and the plug 23, ensuring sealing in the closed state and absorbing some vibration and impact when opened, making the discharge control more stable.

[0040] When the sample addition is complete, gear 30 stops moving, and the external drive device drives plug 23 to reset upwards, resealing the outlet. Throughout the process, the sealing ring 40 between the connecting part 13 and the axial extension part 31 effectively prevents material leakage from the top. Meanwhile, the ball bearing 16, under the action of the adjusting spring 15, remains engaged in the positioning ring groove 32, ensuring the axial stability of gear 30 and material rod 20 during rotation, while also providing a clear positioning feel.

[0041] In addition, the preload of the adjusting spring 15 can be adjusted by turning the positioning screw 14, thereby changing the tightness of the fit between the ball 16 and the positioning ring groove 32 to adapt to different working requirements and wear conditions.

[0042] In summary, this invention achieves precise opening control and reliable sealing of the discharge port by combining gear drive with an elastic floating structure, thus solving the problems of precision feeding and leakage.

[0043] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sample dispenser, characterized in that: Includes a material cylinder (10), the upper end of which is dynamically sealed to a gear (30), the axial extension (31) of the gear (30) extends into the inner hole of the connecting part (13) of the material cylinder (10), a material rod (20) is installed through the center hole of the gear (30), and the lower end of the material rod (20) is threaded to a plug (23). The material rod (20) can be axially elastically extended and retracted relative to the gear (30) to control the opening size and on / off state of the material cylinder (10) outlet. The outer surface of the axial extension (31) is provided with a positioning ring groove (32), and an adjusting spring (15) is provided in the positioning hole of the connecting part (13). The outer end of the adjusting spring (15) is adjusted and limited by the positioning screw (14), and the inner end of the adjusting spring (15) is pressed on the ball (16). The inner side of the ball (16) rolls in the positioning ring groove (32). The lower end of the connecting part (13) is provided with an arch-breaking feeding structure, which is sleeved on the material rod (20) to break the arch and feed the material in the material cylinder (10).

2. The sampler as described in claim 1, characterized in that: The arch-breaking feeding structure includes an integrally connected arch-breaking plate (33), a sleeve part (34) and a spiral feeding part (22). The arch-breaking plate (33) is fixedly connected to the axial extension part (31). The surface of the sleeve part (34) is provided with axially extended blades. The spiral feeding part (22) is located in the lower cylinder of the material cylinder (10).

3. The sampler as described in claim 1, characterized in that: The feed port (17) is provided on the side of the feed cylinder (10).

4. The sampler as described in claim 1, characterized in that: The top of the material cylinder (10) is provided with a feeding port (17).

5. The sampler as described in claim 1, characterized in that: The toothed portion of the gear (30) is located at the top of the axial extension (31).

6. The sampler as described in claim 1, characterized in that: The connecting part (13) is provided with a sealing groove, and a sealing ring (40) is provided in the sealing groove. The sealing ring (40) achieves the sealing between the inner wall of the connecting part (13) and the axial extension part (31).

7. The sampler as described in claim 1, characterized in that: The upper part of the rod (20) is fitted with an upper spring (21). The upper end of the upper spring (21) is pressed against the first limiting plate (24) at the upper end of the rod (20), and the lower end of the upper spring (21) is pressed against the top surface of the axial extension (31).

8. The sampler as described in claim 7, characterized in that: The top of the material rod (20) is also provided with a second limiting plate (25), and a material picking control station is formed between the first limiting plate (24) and the second limiting plate (25).

9. The sampler as described in claim 1, characterized in that: The material cylinder (10) includes a hopper section (11), the lower end of which is integrally connected to the discharge cylinder (12), and the upper end of which is integrally connected to the connecting section (13).

10. The sampler as claimed in claim 1, characterized in that: The lower surface of the barrel (10) is provided with positioning protrusions (18).

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