A machine head for a vacuum drying machine

Abstract

The utility model relates to a kind of head for vacuum drying machine, vacuum drying machine includes several from top to bottom sequentially stacked platform, heating flow passage is had in platform, vacuum cover is also provided on the platform located uppermost, head includes with the heating flow passage of each platform one-to-one corresponding communication liquid supply branch pipe and liquid discharge branch pipe;Two different temperature heat exchange medium of switching use is circulated in the liquid supply branch pipe, and is defined as first heat exchange medium and second heat exchange medium respectively, and the temperature of second heat exchange medium is higher than the temperature of first heat exchange medium.In the utility model, by using two different temperature heat exchange medium in the liquid supply branch pipe, according to the opening condition of vacuum cover or platform, the switching of different temperature heat exchange medium is selected to corresponding platform, the heat loss is made up by high-temperature heat exchange medium, which not only ensures good drying effect, but also does not need to prolong drying time, improves drying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of leather drying, and in particular to a head for a vacuum dryer. Background Technology

[0002] When using a vacuum dryer to dry leather, firstly, hot steam is used to heat the leather to evaporate the moisture. This process requires components such as heaters and heating pipes. Secondly, after the moisture in the leather has evaporated and vaporized, the evaporated water vapor needs to be extracted in time by vacuuming. This process requires components such as vacuum pumps, condensers, vacuum pipes, separation tanks, and oil-water separators. The entire drying process requires many components, which are arranged in a rather messy manner, thus occupying a lot of space and area. Moreover, if a component or pipeline malfunctions, repairs are quite troublesome.

[0003] In response to the above phenomenon, patent CN209522859U proposes a vacuum dryer head, including a mounting frame with a first vertical mounting area, a second vertical mounting area, and a third vertical mounting area arranged in parallel on the mounting frame; a vacuum branch pipe and a primary drain tank are installed in the first vertical mounting area; a condenser, a heater, a main inlet water pipe, and a main outlet water pipe are installed in the second vertical mounting area; and a Roots pump, a vacuum pump, a secondary drain tank, a separation tank, and an oil-water separator are installed in the third vertical mounting area.

[0004] When using the aforementioned machine head in conjunction with a vacuum dryer, a combination of an inlet main pipe, inlet branch pipes, an outlet main pipe, and outlet branch pipes is employed to provide the heat exchange medium (hot water) to each platform of the vacuum dryer, so as to heat and dry the leather placed on the platform. Existing vacuum dryers typically consist of several stacked trays. Sealing rings and other components between adjacent trays create a sealed drying chamber for vacuuming and heating the leather. However, during drying, the leather is not placed on each tray sequentially before the heat exchange medium is introduced. Instead, heat exchange is introduced after each piece of leather is placed. This continuous production mode reduces waiting time between loading and unloading. However, this introduces another problem: the current heating system uses a single main water inlet pipe to supply the heat exchange medium to all trays, meaning the medium temperature is fixed. The temperature of the drying chamber and the tray surface are both determined by the medium. When replacing a piece of leather after the previous one has dried, the previous tray must be opened. This process leads to heat loss and a drop in temperature within the drying chamber, necessitating extended drying times to maintain the drying effect and reducing production efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a vacuum dryer head that reduces drying time while ensuring the drying effect of leather.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: a head for a vacuum dryer. The vacuum dryer includes several plates stacked from top to bottom. Each plate has a heating channel. A vacuum hood is also provided on the uppermost plate. The innovation is that the head includes a liquid supply branch pipe and a liquid discharge branch pipe that are connected to the heating channels of each plate in a one-to-one correspondence. The liquid supply branch pipe contains two heat exchange media with different temperatures that are switched between use, and are defined as the first heat exchange medium and the second heat exchange medium, respectively, and the temperature of the second heat exchange medium is higher than that of the first heat exchange medium. The vacuum chamber and each platform are defined from top to bottom as opening and closing component 1, opening and closing component 2, ..., opening and closing component N, where N is an integer ≥ 3; During normal drying, the first heat exchange medium flows through the liquid supply branch pipes connected to each plate. When loading and unloading leather, the opening and closing parts that need to be activated are defined as M, and 1≤M≤N-1. The liquid supply branch pipe connected to the opening and closing part M-1 contains the second heat exchange medium, while the liquid supply branch pipe connected to the remaining platforms still contains the first heat exchange medium.

[0007] Furthermore, the machine head also includes a first liquid supply main pipe and a second liquid supply main pipe, and each of the liquid supply branch pipes is connected to the first liquid supply main pipe and the second liquid supply main pipe.

[0008] Furthermore, the connection between the first liquid supply main pipe, the second liquid supply main pipe, and the liquid supply branch pipes is as follows: a first liquid supply connector corresponding to each liquid supply branch pipe is provided on the first liquid supply main pipe, and a second liquid supply connector corresponding to each liquid supply branch pipe is provided on the second liquid supply main pipe. The first liquid supply connector and the second liquid supply connector connected to the same liquid supply branch pipe are connected to the liquid supply branch pipe through a first tee connector. A first liquid supply valve and a second liquid supply valve are also provided on the first liquid supply connector and the second liquid supply connector, respectively.

[0009] Furthermore, the machine head also includes a first drain main pipe and a second drain main pipe, and each drain branch pipe is connected to the first drain main pipe and the second drain main pipe.

[0010] Furthermore, the connection between the first drain main pipe, the second drain main pipe, and the drain branch pipes is as follows: a first drain connector corresponding to each drain branch pipe is provided on the first drain main pipe, and a second drain connector corresponding to each drain branch pipe is provided on the second drain main pipe. The first drain connector and the second drain connector connected to the same drain branch pipe are connected to the drain branch pipe through a second tee connector. A first drain valve and a second drain valve are also provided on the first drain connector and the second drain connector.

[0011] The advantages of this invention are as follows: By using two heat exchange media of different temperatures to circulate in the liquid supply branch pipe, and selecting the corresponding platform to switch between heat exchange media of different temperatures according to the opening status of the vacuum hood or the platform, the heat loss is compensated by the high-temperature heat exchange media, which not only ensures a good drying effect, but also does not require extending the drying time and improves the drying efficiency.

[0012] The first and second liquid supply mains are used to cooperate with each liquid supply branch pipe and to coordinate with the opening and closing of different valves, thereby enabling the flow of heat exchange media at different temperatures within the same liquid supply branch pipe.

[0013] In addition, a first drain manifold and a second drain manifold are used to cooperate with each drain branch pipe, thereby cooperating with two heat exchange media of different temperatures. This allows heat exchange media of different temperatures to be discharged through different drain manifolds, providing a basis for the subsequent circulation of heat exchange media of different temperatures and avoiding mutual interference between heat exchange media of different temperatures. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the head of the vacuum dryer according to this utility model.

[0015] Figure 2 This is a front view of the head of the vacuum dryer according to this utility model.

[0016] Figure 3 This is a schematic diagram showing the connection between the main supply pipe and the main drain pipe in this utility model.

[0017] Figure 4 This is a front view showing the connection between the liquid supply main pipe and the liquid discharge main pipe in this utility model. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] like Figures 1-4 The image shows a head for a vacuum dryer. The vacuum dryer includes several stacked platforms from top to bottom, each platform having a heating channel. A vacuum hood is also provided on the uppermost platform. The head includes a frame 1, a main liquid supply pipe, a branch liquid supply pipe, a branch liquid discharge pipe, and a main liquid discharge pipe.

[0020] There are several supply and drainage branches, which are connected to the heating channels of each platform to realize the flow of heat exchange medium.

[0021] Two heat exchange media with different temperatures are circulated in the liquid supply branch pipe, which are defined as the first heat exchange medium and the second heat exchange medium, respectively, and the temperature of the second heat exchange medium is higher than that of the first heat exchange medium.

[0022] The vacuum chamber and each platform are defined from top to bottom as opening / closing component 1, opening / closing component 2, ..., opening / closing component N, where N is an integer ≥ 3.

[0023] During normal drying, the first heat exchange medium flows through the liquid supply branch pipes connected to each plate.

[0024] When loading and unloading leather, the opening and closing parts that need to be activated are defined as M, and 1≤M≤N-1. The liquid supply branch pipe connected to the opening and closing part M-1 contains the second heat exchange medium, while the liquid supply branch pipe connected to the remaining platforms still contains the first heat exchange medium.

[0025] The liquid supply main pipe includes a first liquid supply main pipe 2 and a second liquid supply main pipe 3, and each liquid supply branch pipe is connected to the first liquid supply main pipe 2 and the second liquid supply main pipe 3. The first liquid supply main pipe 2 and the second liquid supply main pipe 3 are respectively connected to heat exchange medium sources at different temperatures, and the heat exchange medium sources are pumped into the first liquid supply main pipe 2 or the second liquid supply main pipe 3.

[0026] The connection between the first liquid supply main pipe 2, the second liquid supply main pipe 3, and the liquid supply branch pipes is as follows: a first liquid supply connector 21 corresponding to each liquid supply branch pipe is provided on the first liquid supply main pipe 2, and a second liquid supply connector 31 corresponding to each liquid supply branch pipe is provided on the second liquid supply main pipe 3. The first liquid supply connector 21 and the second liquid supply connector 31 connected to the same liquid supply branch pipe are connected to the liquid supply branch pipe through a first tee connector 11. A first liquid supply valve 22 and a second liquid supply valve 32 are also provided on the first liquid supply connector 21 and the second liquid supply connector 31, respectively.

[0027] The main drain pipe includes a first drain pipe 5 and a second drain pipe 4, and each drain branch pipe is connected to the first drain pipe 5 and the second drain pipe 4. The first drain pipe 5 and the second drain pipe 4 are respectively connected to heat exchange medium sources at different temperatures, and the used heat exchange medium is returned to the heat exchange medium source by pumping.

[0028] The connection between the first drain main pipe 5, the second drain main pipe 4, and the drain branch pipes is as follows: The first drain main pipe 5 is equipped with a first drain connector 51 corresponding to each drain branch pipe; the second drain main pipe 4 is equipped with a second drain connector 41 corresponding to each drain branch pipe. The first drain connector 51 and the second drain connector 41 connected to the same drain branch pipe are connected to the drain branch pipe via a second tee connector 12. A first drain valve 52 and a second drain valve 42 are also installed on both the first drain connector 51 and the second drain connector 41. By using the first drain main pipe 5 and the second drain main pipe 4 to cooperate with the drain branch pipes, two heat exchange media of different temperatures can be used. This allows heat exchange media of different temperatures to be discharged through different drain main pipes, providing a basis for the subsequent circulation of heat exchange media of different temperatures and avoiding mutual interference between heat exchange media of different temperatures.

[0029] The first liquid supply main pipe 2 and the first liquid discharge main pipe 5 are connected by the first circulation pipe 7, and the second liquid supply main pipe 3 and the second liquid discharge main pipe 4 are connected by the second circulation pipe 6, thereby realizing the circulation of the heat exchange medium. Heating pipes 10 are also installed on the outer walls of the first circulation pipe 7 and the second circulation pipe 6. A first liquid supply pump 9 is installed between the first circulation pipe 7 and the first liquid supply main pipe 2, and a second liquid supply pump 8 is installed between the second circulation pipe 6 and the second liquid supply main pipe 3. Through the cooperation of the first circulation pipe 7 and the second circulation pipe 6, and the installation of the heating pipes 10, the heat exchange medium discharged from the heating channel of the platform can be heated and recycled.

[0030] Working principle: First, during normal drying, after the leather is evenly laid on the drying platform, heating begins. At this time, a low-temperature first heat exchange medium is introduced into the first liquid supply main pipe 2 by the heat exchange medium source. Then, the first liquid supply valve 22 is opened and the second liquid supply valve 32 is closed. The first heat exchange medium in the first liquid supply main pipe 2 flows into the liquid supply branch pipe and then into the heating channel of the drying platform, achieving low-temperature heating of the leather. Then, the first heat exchange medium flows from the heating channel into the drain branch pipe. At the same time, the first drain valve 52 is opened in advance and the second drain valve is closed. Door 42 allows the first heat exchange medium in the drain branch pipe to flow into the first drain main pipe 5. If the heating and drying of the leather has been completed, the first heat exchange medium in the first drain main pipe 5 flows back to the corresponding heat exchange medium source. If the leather still needs to be heated and dried, the first heat exchange medium in the first drain main pipe 5 flows into the first circulation pipe 7 and is sent to the first supply main pipe 2 for circulation via the first supply pump 9. At the same time, the corresponding heating pipe 10 is used to heat the circulating first heat exchange medium to ensure the temperature of the first heat exchange medium sent into the first supply main pipe 2.

[0031] When the previous piece of leather on the drying platform needs to be replaced, the platform above it first opens upwards (or the vacuum hood opens if it's the topmost platform). At this time, the first liquid supply valve 22 closes, the second liquid supply valve 32 opens, the first drain valve 52 closes, and the second drain valve 42 opens. A high-temperature second heat exchange medium is introduced from a heat exchange medium source at another temperature into the second liquid supply main pipe 3. The second heat exchange medium flows from the second liquid supply main pipe 3 into the liquid supply branch pipe, and then from the liquid supply branch pipe into the heating channel of the platform, achieving high temperature on the platform. Heating is performed to compensate for heat loss. Then, the second heat exchange medium flows from the heating channel into the drain branch pipe and into the second drain main pipe 4. Similarly, if the upper platform or vacuum hood does not close again, it indicates that the second heat exchange medium needs to be circulated. The second heat exchange medium in the second drain main pipe 4 flows into the second circulation pipe 6 and is then sent to the second supply main pipe 3 by the second supply pump 8 for circulation. At the same time, the corresponding heating pipe 10 heats the flowing second heat exchange medium to ensure the temperature of the second heat exchange medium sent into the second supply main pipe 3. Once the upper platform or vacuum hood is closed again, the second heat exchanger is no longer needed for heating. The heat exchange medium in the second drain manifold 4 flows to the corresponding heat exchange medium source. At the same time, the first liquid supply valve 22 opens, the second liquid supply valve 32 closes, the first drain valve 52 opens, and the second drain valve 42 closes. The first heat exchange medium continues to flow into the heating channel of the platform to heat the leather at a low temperature.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A head for a vacuum dryer, the vacuum dryer comprising several stacked platforms arranged from top to bottom, each platform having a heating flow channel, and a vacuum hood disposed on the uppermost platform, characterized in that: The machine head includes supply branch pipes and drainage branch pipes that are connected to the heating channels of each platform in a one-to-one manner. The liquid supply branch pipe contains two heat exchange media with different temperatures that are switched between use, and are defined as the first heat exchange medium and the second heat exchange medium, respectively, and the temperature of the second heat exchange medium is higher than that of the first heat exchange medium. The vacuum chamber and each platform are defined from top to bottom as opening and closing component 1, opening and closing component 2, ..., opening and closing component N, where N is an integer ≥ 3; During normal drying, the first heat exchange medium flows through the liquid supply branch pipes connected to each plate. When loading and unloading leather, the opening and closing parts that need to be activated are defined as M, and 1≤M≤N-1. The liquid supply branch pipe connected to the opening and closing part M-1 contains the second heat exchange medium, while the liquid supply branch pipe connected to the remaining platforms still contains the first heat exchange medium.

2. The vacuum dryer head according to claim 1, characterized in that: The machine head also includes a first liquid supply main pipe and a second liquid supply main pipe, and each of the liquid supply branch pipes is connected to the first liquid supply main pipe and the second liquid supply main pipe.

3. The vacuum dryer head according to claim 2, characterized in that: The connection between the first liquid supply main pipe, the second liquid supply main pipe, and the liquid supply branch pipes is as follows: a first liquid supply connector corresponding to each liquid supply branch pipe is provided on the first liquid supply main pipe, and a second liquid supply connector corresponding to each liquid supply branch pipe is provided on the second liquid supply main pipe. The first liquid supply connector and the second liquid supply connector connected to the same liquid supply branch pipe are connected to the liquid supply branch pipe through a first tee connector. A first liquid supply valve and a second liquid supply valve are also provided on the first liquid supply connector and the second liquid supply connector, respectively.

4. The vacuum dryer head according to claim 1, characterized in that: The machine head also includes a first drain main pipe and a second drain main pipe, and each drain branch pipe is connected to the first drain main pipe and the second drain main pipe.

5. The vacuum dryer head according to claim 4, characterized in that: The connection between the first drain main pipe, the second drain main pipe, and the drain branch pipes is as follows: a first drain connector corresponding to each drain branch pipe is provided on the first drain main pipe, and a second drain connector corresponding to each drain branch pipe is provided on the second drain main pipe. The first drain connector and the second drain connector connected to the same drain branch pipe are connected to the drain branch pipe through a second tee connector. A first drain valve and a second drain valve are also provided on the first drain connector and the second drain connector.

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