Bobbin holder for a lift piston type sample dyeing machine

Abstract

The utility model belongs to the technical field of yarn dyeing, especially a bobbin fixing frame of lift piston type sample dyeing machine, in view of the single dyeing liquid circulation path of existing fixed frame is easy to cause uneven dyeing, and the problem that the process stability is damaged by stopping and opening cover halfway, the present scheme is proposed, including fixed pipe, the yarn pipe of sleeve on it and the lower sealing washer and upper sealing washer of sleeve on the upper and lower end of fixed pipe respectively, the bottom of fixed pipe is equipped with the flow guide hole, its top passes through the threaded connection and has the connecting rod of axial cavity, the lower part of connecting rod is opened and has the liquid outlet hole, the lower sealing washer is sealed with the inner wall sliding of dyeing cup, the outer diameter of upper sealing washer is less than the cup inner diameter to form the annular gap, in the utility model, the reciprocating motion of fixed frame forces the inside and outside two-way circulation of dyeing liquid through the flow guide hole and yarn pipe through -hole, improves the dyeing liquid penetration uniformity, through the cavity of connecting rod can be directly filled in the operation, the reagent spreads through the liquid outlet hole and annular gap, avoids the process interruption and temperature fluctuation.

Description

Technical Field

[0001] This utility model relates to the field of yarn dyeing technology, and in particular to a yarn tube fixing frame for a lifting piston type sample dyeing machine. Background Technology

[0002] The yarn tube holder of the lifting piston type small sample dyeing machine is a key component used in dyeing experiments. Its function is to fix the yarn tube in the sample cup and drive it to make reciprocating piston motion in the dye liquor through the drive mechanism, thereby forcing the dye liquor to repeatedly penetrate the yarn and realize the small-scale dyeing process. The traditional holder is usually a solid or hollow bottom rod with a simple sealing structure at the bottom, which relies on its up and down movement in the cup to generate the basic circulation of dye liquor through the yarn.

[0003] However, existing technologies have significant shortcomings: on the one hand, the dye liquor circulation relies solely on a single flow path formed by piston extrusion, resulting in a passive and simple flow pattern. This easily leads to uneven flow or insufficient exchange within the yarn, affecting the uniformity of dye distribution and reducing the matching degree between small-scale and large-scale processes. On the other hand, when the dyeing process requires the addition of dyes or auxiliaries, existing equipment must be stopped and the cup lid opened. This operation not only interrupts the forced circulation and constant temperature environment of the dye liquor, causing unrecoverable temperature fluctuations within the cup, but also introduces uncertainties in human operation. Therefore, we propose a yarn tube fixing frame for a lifting piston type small-scale dyeing machine to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies, such as the single circulation path of dye liquor leading to uneven distribution, the need to stop the machine and open the cap for mid-process refilling, which disrupts the constant temperature environment and introduces operational errors. Therefore, this invention proposes a yarn tube fixing frame for a lifting piston type small sample dyeing machine.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A yarn tube fixing frame for a lifting piston type small sample dyeing machine includes a fixing tube, a yarn tube, and a sample cup. The fixing tube and the yarn tube are both located inside the sample cup. A lower sealing gasket and an upper sealing gasket are respectively fitted on the fixing tube. The yarn tube is fitted on the fixing tube and is located between the lower sealing gasket and the upper sealing gasket. The bottom and top of the yarn tube abut against the top of the lower sealing gasket and the bottom of the upper sealing gasket, respectively. The bottom of the fixed tube is provided with multiple guide holes, and the yarn tube is provided with multiple through holes; The top of the fixed tube is detachably fixedly connected to a connecting rod, and the top of the connecting rod forms an axially extending cavity for adding reagents. Multiple liquid outlet holes communicating with the cavity are opened on the lower part of the connecting rod.

[0006] In one possible design, the top of the lower sealing gasket and the bottom of the upper sealing gasket are both provided with grooves that match the yarn tube.

[0007] In one possible design, the outer wall of the lower sealing gasket is in a sealing sliding connection with the inner wall of the sample cup.

[0008] In one possible design, the outer diameter of the upper sealing gasket is smaller than the inner diameter of the sample cup, and a gap is left, which forms a mixing channel for the downward flow of the added reagent.

[0009] In one possible design, the top of the connecting rod extends above the sample cup, and its opening is funnel-shaped with an outward flaring.

[0010] In one possible design, the top of the connecting rod is provided with a fixing slot for easy fixation.

[0011] In one possible design, a threaded rod is fixedly provided at the top of the fixed tube, and the end of the connecting rod has a threaded hole that matches the threaded rod. The threaded rod is threadedly connected to the threaded hole, and when the connecting rod is assembled on the fixed tube, its bottom end face abuts against the upper sealing gasket.

[0012] In this application, before the dyeing operation begins, the operator winds the yarn onto the yarn tube, then fits the yarn tube onto the fixed tube, embedding its upper and lower ends into the corresponding grooves on the top and bottom of the lower sealing gasket, respectively, to achieve axial positioning. Next, the pre-set threaded hole at the bottom of the connecting rod is aligned with the threaded rod at the top of the fixed tube and screwed in. During tightening, the bottom end of the connecting rod presses against the upper sealing gasket, thus firmly clamping the yarn tube between the top of the lower sealing gasket and the upper sealing gasket, ensuring the structural integrity of the entire fixing frame during movement. The fixing slot at the top of the connecting rod engages with the corresponding interface of the external drive unit. Finally, it is placed into the sample cup containing the dye solution. At this time, the outer edge of the lower sealing gasket is tightly fitted with the inner wall of the sample cup, forming a sliding radial seal. After the drive unit is started, it drives the connecting rod and the entire fixed frame that is fixed to it to make a reciprocating piston movement in the vertical direction inside the sample cup. When the fixed frame moves downward, the dye liquor space below the lower sealing gasket is compressed and the pressure increases. Under this squeezing action, the dye liquor flows upward into the yarn tube through multiple guide holes distributed circumferentially at the bottom of the fixed tube, forming a forced flow path from the inside to the outside. The flowing dye liquor then penetrates radially into the yarn outside the yarn tube through the densely distributed through holes on the yarn tube wall, realizing the dyeing of the yarn from the inside to the outside. When the fixing frame is lifted upwards, the volume of the cavity below the lower sealing gasket increases, creating a negative pressure. This negative pressure is transmitted to the internal space of the yarn tube through the guide hole. At this time, the pressure inside the yarn tube is lower than the dye liquor pressure outside it, forcing the dye liquor to be drawn into the yarn tube from the outside through the through hole on the yarn tube, completing the dye liquor exchange and penetration from the outside to the inside. One up-and-down stroke constitutes a complete two-way circulation of dye liquor penetrating the yarn. During the entire dyeing cycle, if additional dye or chemical auxiliaries are required, the operator directly injects the liquid to be added from the funnel-shaped flared opening at the top of the connecting rod. The liquid flows down along the axial cavity inside the connecting rod and flows out from the outlet hole opened on its lower side wall. Since the outer circumference of the upper sealing gasket is smaller than the inner diameter of the sample cup, there is an annular gap between the two. The added liquid will flow out from the outlet hole and enter the annular gap, and slowly diffuse downward along this gap into the middle and lower part of the dye bath. This process achieves precise material addition under the condition that the dyeing process is not interrupted and the temperature field is not disturbed, and promotes the rapid and uniform distribution of the newly added material in the dye bath through dual-path diffusion.

[0013] Beneficial effects: In this utility model, the yarn tube fixing frame of the lifting piston type sample dyeing machine, through the piston assembly composed of a fixing tube, an upper sealing gasket, a lower sealing gasket, and a yarn tube with through holes, can achieve the effect of improving the directionality and fullness of dye liquor circulation. The sliding seal between the lower sealing gasket and the cup wall ensures the airtightness of the piston cavity. When moving up and down, the dye liquor is forced to exchange through the guide hole at the bottom of the fixing tube and the through hole on the yarn tube wall, forming a controllable bidirectional flow channel from the inside to the outside of the yarn tube and then back to the inside from the outside. This breaks the single flow pattern, allowing the dye liquor to be exchanged and circulated more evenly and fully inside and outside the yarn, effectively improving the dyeing uniformity. In this utility model, the yarn tube fixing frame of the lifting piston type small sample dyeing machine can achieve continuous dyeing and dynamic precise injection through a cavity connecting rod that can be detachably connected at the top. The flared structure at the top of the connecting rod facilitates the receipt of additives, and its internal axial cavity and lower liquid outlet form a closed channel directly to the dye bath. With the help of this channel, dyes or auxiliaries can be directly injected while the equipment is running continuously and the cup lid is sealed, completely avoiding process interruption and temperature fluctuation caused by opening the lid in the middle, ensuring strict adherence to the dyeing process curve, and significantly enhancing the controllability and reproducibility of the experiment. In this invention, the yarn tube fixing frame of the lifting piston type small sample dyeing machine has a structure in which the outer diameter of the upper sealing gasket is smaller than the cup wall to form an annular gap. This structure can promote the rapid and uniform dispersion of newly added reagents. This gap serves as an additional mixing channel and forms a dual-path flow with the liquid outlet of the connecting rod. During addition, the reagent diffuses downward along this annular gap. This distribution method accelerates the mixing process of the reagent and the main dye solution, avoids excessively high local concentrations, and further ensures the uniformity and stability of the dyeing effect. In this invention, a piston assembly consisting of a fixed tube, a sealing gasket, and a yarn tube forms a controllable bidirectional circulation channel for the dye solution inside and outside the yarn, improving the uniformity and sufficiency of dye solution penetration. A connecting rod with a cavity at the top enables continuous dyeing and dynamic addition in a closed environment, avoiding process interruptions and temperature fluctuations, and enhancing experimental reproducibility. The annular gap between the upper sealing gasket and the cup wall forms a mixing channel, promoting rapid and uniform dispersion of newly added reagents, preventing excessively high local concentrations, and further ensuring the stability and consistency of the dyeing effect. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a yarn tube fixing frame for a lifting piston type small sample dyeing machine proposed in this utility model; Figure 2 This is a partially exploded three-dimensional structural diagram of the yarn tube fixing frame of a lifting piston type small sample dyeing machine proposed in this utility model. Figure 3 This is a three-dimensional structural diagram of the connecting rod of the yarn tube fixing frame of a lifting piston type small sample dyeing machine proposed in this utility model. Figure 4 This is a three-dimensional structural diagram of the sample cup of the yarn tube fixing frame of the lifting piston type small sample dyeing machine proposed in this utility model.

[0015] In the diagram: 1. Fixed tube; 2. Yarn tube; 3. Lower sealing gasket; 4. Upper sealing gasket; 5. Connecting rod; 6. Threaded rod; 7. Guide hole; 8. Liquid outlet hole; 9. Fixed groove; 10. Sample cup. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] In one embodiment: Refer to Figure 1-4 A yarn tube holder includes a fixing tube 1, a yarn tube 2, and a sample cup 10. The fixing tube 1 and the yarn tube 2 are both located inside the sample cup 10. A lower sealing gasket 3 and an upper sealing gasket 4 are respectively fitted on the fixing tube 1. The yarn tube 2 is fitted on the fixing tube 1 and is located between the lower sealing gasket 3 and the upper sealing gasket 4. The bottom and top of the yarn tube 2 abut against the top of the lower sealing gasket 3 and the bottom of the upper sealing gasket 4, respectively. The bottom of the fixing tube 1 has multiple guide holes 7, and the yarn tube 2 has multiple through holes. The top of the fixing tube 1 is detachably connected to a connecting rod 5. The top of the connecting rod 5 forms an axially extending cavity for adding reagents. Multiple liquid outlet holes 8 communicating with the cavity are opened on the lower part of the connecting rod 5.

[0018] Furthermore, the top of the lower sealing gasket 3 and the bottom of the upper sealing gasket 4 are both provided with grooves that match the yarn tube 2. Before the dyeing operation begins, the operator winds the yarn onto the yarn tube 2, and then puts the yarn tube 2 onto the outside of the fixing tube 1, so that its upper and lower end faces are respectively embedded into the corresponding grooves on the top of the lower sealing gasket 3 and the bottom of the upper sealing gasket 4, thereby achieving axial positioning of the yarn tube 2 and preventing axial displacement of the yarn tube 2 during subsequent movement.

[0019] Specifically, a threaded rod 6 is fixedly installed at the top of the fixed tube 1, and a threaded hole matching the threaded rod 6 is started at the end of the connecting rod 5. The threaded rod 6 is threadedly connected to the threaded hole, and when the connecting rod 5 is assembled on the fixed tube 1, its bottom end face abuts against the upper sealing gasket 4. After the axial positioning of the yarn tube 2 is completed, the operator can align the threaded hole at the bottom end of the connecting rod 5 with the threaded rod 6 at the top of the fixed tube 1 and screw them together. During the tightening process, the bottom end face of the connecting rod 5 will press against the upper sealing gasket 4, thereby firmly clamping the yarn tube 2 between the top of the lower sealing gasket 3 and the upper sealing gasket 4, thus ensuring the structural integrity of the entire fixing frame during movement.

[0020] Furthermore, the outer wall of the lower sealing gasket 3 is slidably connected to the inner wall of the sample cup 10. After the assembly of the connecting rod 5 and the fixing tube 1 is completed, the operator can place the entire fixing frame into the sample cup 10 that has been filled with dye solution. At this time, the outer edge of the lower sealing gasket 3 is tightly fitted with the inner wall of the sample cup 10 to form a sliding radial seal, providing basic conditions for the directional flow of the dye solution.

[0021] To ensure thorough penetration of the dye into the yarn, when the fixing frame moves downwards, the dye space below the lower sealing gasket 3 is compressed, increasing the pressure. Under this pressure, the dye flows upwards into the yarn tube 2 through multiple circumferentially distributed guide holes 7 at the bottom of the fixing tube 1, forming a forced flow path from the inside out. The incoming dye then penetrates radially into the yarn surrounding the yarn tube 2 through densely distributed through-holes on the tube wall, achieving dyeing of the yarn from the inside out. When the fixing frame moves upwards, the space below the lower sealing gasket 3 increases, creating a negative pressure. This negative pressure acts on the guide holes 7, drawing the dye from the outside of the yarn tube 2 and between the yarns into the yarn tube 2 through the through-holes, completing the dye exchange from the outside in. The drawn-in dye is then drawn back into the cavity below the fixing frame through the guide holes 7. This up-and-down motion constitutes a complete bidirectional circulation of the dye penetrating the yarn. This bidirectional circulation of the dye allows for more even and thorough penetration of the dye into the yarn, effectively improving dyeing uniformity.

[0022] This application can be used in the field of yarn dyeing technology, or in other fields applicable to this application.

[0023] In another embodiment: Reference Figure 3-4Based on Embodiment 1, an improvement is made to the yarn tube fixing frame of a lifting piston type sample dyeing machine, which is applied in the field of yarn dyeing technology. The structure of this embodiment is basically the same as the aforementioned embodiment, except that: further, the top of the connecting rod 5 extends to the top of the sample cup 10, and its opening is in the shape of an outwardly flared funnel. Preferably, the top of the connecting rod 5 is provided with a fixing slot 9 for easy fixing. The fixing slot 9 can be engaged with the corresponding interface of the external drive unit. After the drive unit is started, it can drive the connecting rod 5 and the entire fixing frame fixed thereto to make reciprocating piston movements in the vertical direction within the sample cup 10.

[0024] Specifically, the outer diameter of the upper sealing gasket 4 is smaller than the inner diameter of the sample cup 10, leaving a gap. This gap forms a mixing channel for the downward flow of the added reagent. During the entire dyeing cycle, if additional dye or chemical auxiliaries are needed, the operator can directly inject the liquid to be added from the funnel-shaped flared opening at the top of the connecting rod 5. The liquid flows down along the axial cavity inside the connecting rod 5 and flows out from the outlet hole 8 on its lower side wall. Since the outer circumference of the upper sealing gasket 4 is smaller than the inner diameter of the sample cup 10, the annular gap between the two becomes an additional mixing channel. The added liquid will flow out from the outlet hole 8, enter the annular gap, and slowly diffuse downward along this gap into the middle and lower part of the dye bath. This process can complete the precise addition of materials without interrupting the dyeing process or disturbing the temperature field. At the same time, the dual-path diffusion can promote the rapid and uniform distribution of the newly added materials in the dye bath, avoid excessively high local concentrations, further ensure the uniformity and stability of the dyeing effect, and also ensure the strict adherence to the dyeing process curve, enhancing the controllability of the experiment and the reproducibility of the results.

[0025] To ensure long-term operational reliability, the lower sealing gasket 3 should be made of a heat- and chemically resistant elastic material (such as silicone rubber or fluororubber). It is recommended to periodically inspect and clean the outer surface of the lower sealing gasket 3 and the inner wall of the sample cup 10 according to usage frequency to prevent dye accumulation from affecting sealing and sliding performance.

[0026] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A yarn tube fixing frame for a lifting piston type sample dyeing machine, comprising a fixing tube (1), a yarn tube (2), and a sample cup (10), characterized in that, The fixing tube (1) and the yarn tube (2) are both located inside the sample cup (10). The fixing tube (1) is fitted with a lower sealing gasket (3) and an upper sealing gasket (4). The yarn tube (2) is fitted on the fixing tube (1) and is located between the lower sealing gasket (3) and the upper sealing gasket (4). The bottom and top of the yarn tube (2) abut against the top of the lower sealing gasket (3) and the bottom of the upper sealing gasket (4), respectively. The bottom of the fixed tube (1) is provided with multiple guide holes (7), and the yarn tube (2) is provided with multiple through holes; The top of the fixed tube (1) is detachably fixedly connected to a connecting rod (5). The top of the connecting rod (5) forms an axially extending cavity for adding reagents. Multiple liquid outlet holes (8) communicating with the cavity are opened on the connecting rod (5) at the bottom.

2. The yarn tube fixing frame of a lifting piston type sample dyeing machine according to claim 1, characterized in that, The top of the lower sealing gasket (3) and the bottom of the upper sealing gasket (4) are both provided with grooves that match the yarn tube (2).

3. The yarn tube fixing frame of a lifting piston type sample dyeing machine according to claim 1, characterized in that, The outer wall of the lower sealing gasket (3) is in a sealing sliding connection with the inner wall of the sample cup (10).

4. The yarn tube fixing frame of a lifting piston type sample dyeing machine according to claim 1, characterized in that, The outer diameter of the upper sealing gasket (4) is smaller than the inner diameter of the sample cup (10), and there is a gap, which forms a mixing channel for the downward flow of the added reagent.

5. The yarn tube fixing frame of a lifting piston type sample dyeing machine according to claim 1, characterized in that, The top of the connecting rod (5) extends above the sample cup (10), and its opening is in the shape of an outwardly flared funnel.

6. The yarn tube fixing frame of a lifting piston type sample dyeing machine according to claim 5, characterized in that, The top of the connecting rod (5) is provided with a fixing slot (9) for easy fixing.

7. The yarn tube fixing frame of a lifting piston type sample dyeing machine according to claim 1, characterized in that, The top of the fixed tube (1) is fixedly provided with a threaded rod (6), and the end of the connecting rod (5) has a threaded hole that matches the threaded rod (6). The threaded rod (6) is threadedly connected to the threaded hole, and when the connecting rod (5) is assembled on the fixed tube (1), its bottom end face abuts against the upper sealing gasket (4).

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