A hot oven yarn drawing device

Abstract

The application provides a hot oven yarn traction device and belongs to the technical field of medical devices. The device comprises an oven main body, an oven cover arranged above the oven main body, and a connecting device arranged between one side of the oven cover and one side of the oven main body to open and close the oven cover. A heat preservation plate is arranged on the outer wall of the oven main body, and a heating system is arranged inside the oven main body. A traction device is further arranged on the oven main body. The traction device comprises left and right guide roller groups symmetrically arranged on both sides of the oven main body. Each of the left and right guide roller groups comprises two guide rollers connected by a tensioner. A closed steel wire is wound on the left and right guide roller groups. The winding path of the closed steel wire is in sequence of the left guide roller group, the inside of the oven main body, the right guide roller group, the lower part of the oven main body, and finally returns to the left guide roller group to form a closed loop. The yarn threading is completed without opening the oven cover, so that the temperature stability is maintained, the energy consumption is reduced, and the product consistency is ensured.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a yarn traction device for a hot drying oven. Background Technology

[0002] Currently, the yarn processing industry widely uses openable ovens for drying. During yarn drawing, the oven lid needs to be opened frequently to allow the yarn to pass through the oven, and then closed again after the yarn is drawn through. However, repeated opening and closing of the oven lid leads to the following technical drawbacks: First, a large amount of hot air escapes from the oven during opening, requiring additional energy to reheat to the set temperature, significantly increasing energy consumption; second, a long time (usually tens of minutes) is needed to restore temperature stability after each closure, affecting production efficiency; third, temperature fluctuations cause uneven heating of the yarn, resulting in decreased physical properties (such as tension and uniformity) and a lower product qualification rate; moreover, if the oven is opened during continuous production, products during periods of temperature imbalance need to be isolated for inspection, increasing the cost of controlling defective products. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to address the shortcomings of existing technologies, which, despite optimizing the oven structure, still lack a dedicated device for yarn traction when the oven lid is closed, thus failing to fundamentally solve the problems mentioned in the background technology. This invention provides a yarn traction device for a hot drying oven that completes yarn threading without opening the oven lid, thereby maintaining temperature stability, reducing energy consumption, and ensuring product consistency.

[0004] Technical Solution: The present invention discloses a yarn traction device for a hot drying oven, comprising an oven body, an oven cover on top of the oven body, one side of the oven cover opening and closing with one side of the oven body via a connecting device, insulation plates and an internal heating system on both ends of the outer wall of the oven body, and a traction device on the oven body, comprising a left guide wheel group and a right guide wheel group symmetrically arranged on both sides of the oven body, each consisting of two guide wheels connected by a tensioner, with a closed steel wire wound around the left and right guide wheel groups. The winding path of the closed steel wire is sequentially: left guide wheel group, inside the oven body, right guide wheel group, below the oven body, and finally back to the left guide wheel group, forming a closed loop; the closed steel wire is tightened and fixed by the tensioner. When the oven cover is closed, the closed steel wire forms a yarn traction channel inside the oven body, and the tensioner maintains constant tension on the steel wire to prevent high-temperature relaxation. Therefore, there is no need to open the cover to thread the yarn, and the oven temperature can be kept stable.

[0005] Furthermore, the connecting device includes a hydraulic rod with one end mounted on the oven body and the other end mounted on the oven cover, as well as an oven cover switch and a solenoid directional valve mounted on the oven body. The solenoid directional valve is connected to the hydraulic pump outlet and the hydraulic rod inlet and outlet via oil pipes. The solenoid directional valve switches the hydraulic oil flow direction by valve core displacement, controlling the extension and retraction of the hydraulic rod, thereby controlling the opening and closing of the oven cover switch. When the cover needs to be opened, the switch is triggered, the directional valve moves to the left, hydraulic oil enters the rodless chamber, the piston rod extends, and the oven cover opens. When the cover needs to be closed, the switch is triggered in the reverse direction, the directional valve moves to the right, hydraulic oil enters the rod chamber, the piston rod retracts, and the oven cover seals.

[0006] Furthermore, the vertical distance between the closed steel wire and the insulation board is 5-10mm, ensuring that the closed steel wire is suspended and passes through the inside of the oven. When the insulation board reflects heat radiation, the closed steel wire is only heated by convection.

[0007] Furthermore, the heating system is a wind box located on the top surface inside the oven body. The wind box integrates heating tubes and a fan. The fan drives the airflow through the heating tubes, and the hot air is blown downwards through the flow equalization plate to sweep the inside of the oven body.

[0008] Furthermore, the closed steel wire avoids the air duct opening of the bellows to prevent airflow from affecting the yarn.

[0009] Furthermore, the left and right guide wheel assemblies are respectively mounted on both sides of the oven body via mounting bases. The mounting bases are equipped with ceramic fiber insulation layers, which can...

[0010] Beneficial effects: Compared with the prior art, the advantages of the present invention are as follows:

[0011] (1) The present invention is equipped with a traction device, that is, the yarn is pulled by a closed-loop steel wire in the closed state of the oven lid, and at the same time, the hydraulic system is used to accurately close and seal the lid, which can eliminate heat loss when the lid is opened and save energy and increase efficiency.

[0012] (2) The present invention maintains the uniformity of cavity temperature by setting a uniform hot air system at the top, and ensures the control of the gap between the closed steel wire and the insulation board, which can avoid local low temperature and avoid tension fluctuation of yarn due to uneven heating.

[0013] (3) The present invention shortens the yarn threading time by designing a traction path with closed-loop steel wire, ensuring that the yarn can be threaded at any time during the hot drying process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a structural schematic diagram from another perspective of the present invention. Detailed Implementation

[0016] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited to the embodiments described.

[0017] like Figure 1 The diagram shows a yarn traction device for a hot drying oven, comprising an oven body 1, an oven cover 2 on top of the oven body 1, one side of the oven cover 2 opening and closing with one side of the oven body 1 via a connecting device, the connecting device including a hydraulic rod 6 with one end on the oven body 1 and the other end on the oven cover 2, an oven cover switch 7 and an electromagnetic reversing valve on the oven body 1, the electromagnetic reversing valve being connected to the outlet of a hydraulic pump and the inlet and outlet of the hydraulic rod 6 via oil pipes, the electromagnetic reversing valve switching the direction of hydraulic oil flow by valve core displacement, controlling the extension and retraction of the hydraulic rod 6, thereby controlling the opening and closing of the oven cover switch 7.

[0018] Insulation plates 8 and an internal heating system are installed on both ends of the outer wall of the oven body 1. The two ends are the inlet and outlet ends, respectively, with upper and lower insulation plates at each end. The heating system is a wind box located on the top surface inside the oven body 1. The wind box integrates heating pipes and a fan. The fan blows hot air through the heating pipes, and the hot air is blown downwards into the interior of the oven body 1 via a flow equalization plate. A traction device is also installed on the oven body 1. The traction device includes a left guide wheel assembly 301 and a right guide wheel assembly 302 symmetrically arranged on both sides of the oven body 1. The left guide wheel assembly 301 and the right guide wheel assembly 302 are respectively mounted on both sides of the oven body 1 via mounting bases. Both the left guide wheel assembly 301 and the right guide wheel assembly 302 consist of two guide wheels connected by a tensioner 4. A closed steel wire 5 is wound around both the left and right guide wheel assemblies 301 and 302. The winding path of the closed steel wire 5 is sequentially: left guide wheel assembly 301, inside the oven body 1, right guide wheel assembly 302, below the oven body 1, and finally back to the left guide wheel assembly 301, forming a closed loop. The vertical distance between the closed steel wire 5 and the insulation board 8 ranges from 5 to 10 mm. Simultaneously, the closed steel wire 5 avoids the air duct opening of the air box. The closed steel wire 5 is tightened and fixed by the tensioner 4. When the oven cover 2 is closed, the closed steel wire 5 forms a yarn traction channel inside the oven body 1.

[0019] The working process of this embodiment is as follows:

[0020] 1. System Equipment Phase

[0021] The oven lid must remain closed as the system passes through, the sealing strip is pressed together, the heating system is activated, and the closing steel wire is tightened by the tensioner, with a distance of 8mm between it and the insulation board.

[0022] 2. Yarn threading operation

[0023] Tie a slipknot to the closed steel wire at the inlet side of the oven body. Manually pull the closed steel wire at the outlet side of the oven body, so that the yarn tied to the closed steel wire moves with the steel wire from the inlet to the working chamber inside the oven to the outlet. When the yarn end passes through the outlet of the oven body, the yarn threading is completed.

[0024] 3. Oven heating

[0025] After the yarn is threaded, the knot is untied, and the yarn enters the winding machine directly. Inside the drying oven, the yarn passes through the hot air zone at a constant speed to complete the evaporation of moisture.

[0026] 4. Yarn unwinding and re-threading

[0027] When a single batch ends, the winding machine stops, the yarn is cut, and the new yarn is tied to the closed wire at the exit end and pulled in the opposite direction to the inlet. If an emergency yarn replenishment is needed, the new yarn is directly tied to the closed wire at the inlet end during operation. In this case, when pulling the new yarn, the old yarn is left at the output. If the closed wire needs maintenance, the cover is opened, the tensioner is loosened, and the wire is replaced.

[0028] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A yarn traction device for a hot drying oven, comprising an oven body (1), an oven cover (2) provided on the top of the oven body (1), one side of the oven cover (2) opening and closing with one side of the oven body (1) via a connecting device, heat insulation plates (8) and a heating system provided inside the oven body (1) at both ends of the outer wall of the oven body (1), and a traction device further provided on the oven body (1), characterized in that: The traction device includes a left guide wheel group (301) and a right guide wheel group (302) symmetrically arranged on both sides of the oven body (1). Each of the left guide wheel group (301) and the right guide wheel group (302) consists of two guide wheels. The two guide wheels are connected by a tensioner (4). A closed steel wire (5) is wound on the left guide wheel group (301) and the right guide wheel group (302). The winding path of the closed steel wire (5) is sequentially from the left guide wheel group (301), inside the oven body (1), the right guide wheel group (302), below the oven body (1), and finally back to the left guide wheel group (301) to form a closed loop. The closed steel wire (5) is tightened and fixed by the tensioner (4). When the oven cover (2) is closed, the closed steel wire (5) forms a yarn traction channel inside the oven body (1).

2. The yarn traction device for a hot drying oven according to claim 1, characterized in that: The connecting device includes a hydraulic rod (6) with one end set on the oven body (1) and the other end set on the oven cover (2), and also includes an oven cover switch (7) and an electromagnetic reversing valve set on the oven body (1). The electromagnetic reversing valve is connected to the hydraulic pump outlet and the oil inlet and outlet of the hydraulic rod (6) respectively through oil pipes. The electromagnetic reversing valve switches the hydraulic oil flow direction by valve core displacement, controls the extension and retraction of the hydraulic rod (6), thereby controlling the opening and closing of the oven cover switch (7).

3. The yarn traction device for a hot drying oven according to claim 1, characterized in that: The vertical distance between the closed steel wire (5) and the insulation board (8) is 5 to 10 mm.

4. A yarn traction device for a hot drying oven according to claim 1, characterized in that: The heating system is a wind box installed on the top surface inside the oven body (1). The wind box integrates a heating tube and a fan. The fan blows hot air through the heating tube, and the hot air is blown downward through the flow equalization plate to sweep the inside of the oven body (1).

5. A yarn traction device for a hot drying oven according to claim 4, characterized in that: The closed steel wire (5) avoids the air duct opening of the air box.

6. A yarn traction device for a hot drying oven according to claim 1, characterized in that: The left guide wheel assembly (301) and the right guide wheel assembly (302) are respectively mounted on both sides of the oven body (1) via mounting bases.

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