CN107726858B - Linkage mechanism of vacuum oven - Google Patents

Abstract

The invention discloses a linkage mechanism of a vacuum oven, which belongs to the field of vacuum ovens. It includes an eccentric wheel, a linkage rod, and a top pressing piece, and is characterized in that: the eccentric wheel is covered with two layers of sliding plates, the upper sliding plate has an arc-shaped track for controlling the movement of the eccentric wheel shaft, and the lower sliding plate has a sliding plate that allows the eccentric wheel to pass through One side of the linkage rod is connected to the side of the eccentric wheel, and the other side is connected to the top pressing piece, and the top pressing piece is in contact with the relief valve. The invention can more accurately control the temperature and air pressure of the inner box of the vacuum oven, control the opening and closing of the oven door through the linkage mechanism, and has the advantages of simple structure, reasonable design, easy manufacture and convenient use.

Description

A linkage mechanism of a vacuum oven

technical field

The invention relates to the field of vacuum ovens, in particular to a linkage mechanism of a vacuum oven.

Background technique

The vacuum oven is generally composed of angle steel and steel plate. The outer box and the inner box are filled with thermal insulation materials to form a reliable thermal insulation layer. Industrial ovens are widely used and can dry various industrial materials. It is a general drying equipment.

Existing vacuum ovens generally control the work of the oven through sensors after the working pressure and temperature are preset. When the pressure or temperature in the inner box exceeds the predetermined value, the vacuum oven stops working, and the pressure or temperature is lower than the predetermined value. When the value is reached, the motor continues to work. Since the vacuum oven is generally well sealed, this process takes a long time and the working efficiency of the vacuum oven is low. After the items in the oven are dried, you need to wait for the pressure of the box in the vacuum oven to be the same as the atmospheric pressure before you can manually open the oven door. However, because the oven door has the function of heat insulation and sealing, this process takes a long time to open. The furnace door is time-consuming and labor-intensive, and the efficiency is extremely low, which affects industrial production.

Therefore, a technical problem that needs to be urgently solved by those skilled in the art is: how to innovatively propose an effective measure to meet the requirements that the vacuum oven can automatically control the pressure and temperature of the inner box, and control the door of the vacuum oven through linkage equipment , to achieve the purpose of improving safety capability and improving work efficiency.

SUMMARY OF THE INVENTION

In order to overcome the above problems, the present invention provides the society with a linkage mechanism of a vacuum oven with low energy consumption, high safety factor, simple structure, and can effectively control the air pressure and temperature in the vacuum oven box and automatically control the box door.

The technical scheme adopted in the present invention is as follows: a linkage mechanism of a vacuum oven is provided, comprising an eccentric wheel, a linkage rod, and a top pressing sheet, the eccentric wheel is covered with two layers of sliding plates, and the upper sliding plate has a mechanism for controlling the movement of the eccentric wheel shaft. The arc track, the lower sliding plate has a gap that allows the eccentric wheel to pass through, one side of the linkage rod is connected to the side of the eccentric wheel, and the other side is connected to the top pressing piece, which is in contact with the air release valve.

Preferably, the bottom rotating shaft of the eccentric wheel is fixed on the inner box of the oven, the rotating shaft is deviated from the center of the eccentric wheel disc, the movable shaft is on the other side of the eccentric wheel disc, and the connection between the rotating shaft and the axis of the movable shaft The line passes through the center of the eccentric roulette.

Preferably, the right side of the lower sliding plate is connected with the lock of the vacuum oven.

Preferably, the upper sliding plate and the lower layer move left or right together.

Preferably, the contact part between the top pressing sheet and the air release valve is a "U"-shaped structure.

Compared with the prior art, the beneficial effects of the present invention are: the linkage mechanism of the present invention can control the opening and closing of the valve through the pressure of the top pressing sheet on the pressure relief valve, and can adjust the working air pressure and temperature of the inner box in time. The invention has the advantages of simple operation, good safety performance and high use efficiency.

Description of drawings

Fig. 1 is the linkage mechanism structural representation of the vacuum oven of the present invention;

2 is a schematic diagram of the structural components of the linkage mechanism of the present invention;

In the figure: 1, eccentric wheel; 101, eccentric wheel disc; 102, rotating shaft; 103, movable shaft; 2, linkage rod; 3, top pressing sheet; 301, "U" shaped sheet; 302, rotating sheet; 303. Fixed tablet; 4. Pressure relief valve; 5. Upper sliding plate; 6. Lower sliding plate; 7. Lock.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in Figures 1 and 2, the vacuum oven includes: an eccentric wheel 1, a linkage rod 2, and a top pressing plate 3. The eccentric wheel is covered with two layers of sliding plates, and the upper sliding plate 5 has an arc that controls the movement of the eccentric wheel shaft. The lower sliding plate 6 has a gap that allows the eccentric wheel to pass through. One side of the linkage rod 2 is connected to the side of the eccentric wheel, and the other side is connected to the top pressing piece 3, which is in contact with the relief valve 4. The bottom rotating shaft 102 of the eccentric wheel 1 is fixed on the inner box of the vacuum oven, the rotating shaft 102 is deviated from the center of the eccentric wheel disc 101, the movable shaft 103 is on the other side of the eccentric wheel disc 101, and the rotating shaft 102 is connected to the movable The line connecting the axis of the shaft 103 passes through the center of the eccentric wheel disc 101 . The right side of the lower sliding plate 6 is connected with the lock 7 of the vacuum oven. When the vacuum oven is working, if the air pressure or temperature in the vacuum oven exceeds the preset value, the rotating shaft 102 of the eccentric wheel 1 rotates to the left, which drives the eccentric wheel disc 101 to rotate to the right, and the movable shaft of the eccentric wheel 1 is in the lower layer. The arc track of the sliding plate 6 moves to the left, the eccentric wheel disc 101 protrudes outward, the edge of the wheel disc exerts an outward thrust to the linkage rod 2, and the linkage rod pushes the rotating blade 302 of the top pressing plate 3 to rotate clockwise, and the rotating blade 302 pushes the "U"-shaped sheet 303 of the top pressing sheet 3 to lift up, the valve of the air relief valve 4 is opened, the outside air enters, the air pressure in the vacuum oven rises, and the temperature decreases. When the internal air pressure rises to the same as the external air pressure, the door of the vacuum oven can be opened. If the vacuum oven just works, the rotating shaft 102 of the eccentric wheel 1 rotates to the right, driving the eccentric wheel disc 101 to rotate to the right, the movable shaft of the eccentric wheel 1 moves to the right in the arc track of the lower sliding plate 6, and the eccentric wheel The roulette 101 is retracted inward, the edge of the roulette is subjected to the reaction force of the linkage rod 2, the rotating blade 302 rotates counterclockwise, the "U"-shaped piece 303 of the top pressing plate 3 is connected to the bottom of the valve of the air relief valve 4, and the valve of the air relief valve 4 is formed. In the closed state, it is isolated from the external environment, the air pressure in the vacuum oven decreases, the temperature increases, and at the same time, the vacuum oven lock is locked.

Because the linkage mechanism is added to the vacuum oven, the vacuum oven can conveniently control the pressure relief valve to work through the linkage mechanism, and flexibly and efficiently control the air pressure and temperature in the inner box. At the same time, the sliding plate is driven by the rotation of the eccentric wheel to automatically control the lock Locking and opening, compared with the prior art, the vacuum oven has simple structure, convenient operation, flexible use, more accurate air pressure and temperature in the inner box, more intelligent lock switch, higher working efficiency and higher safety of the oven. powerful.

The present invention and its embodiments have been described above schematically, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of the present invention, any structural modes and embodiments similar to this technical solution are designed without creativity, which shall belong to the protection scope of the present invention. .

Claims (2)

1. the linkage mechanism of a vacuum oven, comprising: eccentric wheel, linkage rod, top pressing sheet, it is characterized in that: the top of described eccentric wheel is covered with two layers of sliding plates, and the upper sliding plate has an arc track that controls the movement of the eccentric wheel shaft , the lower sliding plate has a gap that allows the eccentric wheel to pass through, one side of the linkage rod is connected to the side of the eccentric wheel, and the other side is connected to the top pressing piece, which is in contact with the relief valve; the bottom rotating shaft of the eccentric wheel is fixed on the On the inner box of the oven, the rotating shaft deviates from the center of the eccentric wheel, the movable shaft is on the other side of the eccentric wheel, and the connection line between the rotating shaft and the axis of the movable shaft passes through the center of the eccentric wheel; the lower layer slides The right side of the plate is connected with the lock of the vacuum oven; the upper sliding plate and the lower sliding plate move left or right together. 2 . The linkage mechanism of the vacuum oven according to claim 1 , wherein the contact part between the top pressing sheet and the air release valve is a "U"-shaped structure. 3 .

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