Hood body lifting device of high-precision steaming and baking machine

Abstract

The utility model relates to a high-precision lifting device for a cover body of a steaming and baking machine. The problem to be solved is that a gear motor with a chain for lifting is easy to break after long-time use, and a large-size gear motor cannot be mounted due to limitation of the bottom space of a steaming and baking machine. When four pumps and four oil cylinders are adopted for lifting a cover body, the position of a pump station is greatly limited, and the synchronous lifting precision error is large, so that collision between the cover body of the steaming and baking machine and an inner cavity sealing structure is easily caused. The technical key points for solving the technical problem are as follows: four lifting oil cylinders with position sensors are connected with a balance valve, the balance valve is connected with a proportional electromagnetic valve group, the proportional electromagnetic valve group is connected with a power unit, and a controller is electrically connected with the proportional electromagnetic valve group and the four lifting oil cylinders with the position sensors. The lifting device is suitable for lifting the steaming-baking machine cover.

Description

Technical Field

[0001] The utility model relates to the technical field of food processing machinery, in particular to a high-precision steaming and baking machine cover lifting device. Background Art

[0002] At present, the relative humidity of the use environment of steam-bake machines used in food industry cooking is relatively high. The materials of steam-bake machines are generally stainless steel. In order to facilitate maintenance and cleaning of the inside of the steam-bake machine, the cover of the steam-bake machine is generally in a liftable form. The cover lifting forms mainly include the reduction motor with chain lifting type and the four-pump four-cylinder lifting type.

[0003] The so-called speed reducer with chain lifting type means that a dual-output speed reducer motor is installed at each feeding and discharging end, and the sprocket is driven to rotate by the speed reducer motor. The rotation of the sprocket drives the chain to move to realize the vertical lifting of the steam-bake machine cover. This type of cover lifting form is prone to fatigue and breakage after long-term use; it cannot lift a heavy steam-bake machine cover because a large-size speed reducer motor cannot be installed due to space limitations at the bottom of the steam-bake machine.

[0004] The so-called four-pump four-cylinder lifting type uses four pumps to drive four cylinders to lift the cover. Since the distance between the lifting columns of the steamer and oven is generally greater than 6 meters, this lifting form has high requirements on the location of the pump station. The pump station needs to be arranged at the center of the quadrilateral formed by the four cylinders to ensure that the four pumps have the same length of pipeline to the cylinder and the same resistance along the way; the synchronization error is large, which can easily cause the steamer cover to collide with the inner cavity sealing structure. Utility Model Content

[0005] The purpose of the utility model is to provide a high-precision lifting device for a steam-oven hood to solve the defects existing in the background technology: the reduction motor is lifted with a chain, the lifting chain is easy to break after long-term use, and the space at the bottom of the steam-oven cannot install a large-size reduction motor; when four pumps are used to supply four oil cylinders to lift the hood, the position of the pump station is greatly restricted, and the synchronous lifting accuracy error is large, which can easily cause a collision between the steam-oven hood and the inner cavity sealing structure.

[0006] The technical solution adopted to solve the technical problem is: a high-precision steaming and baking machine cover lifting device, characterized in that: four lifting cylinders with position sensors are connected to the balance valve, the balance valve is connected to the proportional solenoid valve group, the proportional solenoid valve group is connected to the power unit, and the controller is electrically connected to the proportional solenoid valve group and the four lifting cylinders with position sensors. Among them, each of the four lifting cylinders with position sensors has a rodless cavity and a rod cavity cylinder and an external pull-wire sensor, a fixing plate is arranged at the bottom of the cylinder with the rodless cavity and the rod cavity, and the top of the cylinder with the rodless cavity and the rod cavity is connected to the steaming and baking machine cover body with a joint bearing. The balance valve is directly installed on the cylinder with the rodless cavity and the rod cavity. The four proportional solenoid valves of the proportional solenoid valve group respectively control the flow rate to each cylinder with the rodless cavity and the rod cavity. The power unit includes an oil tank, a motor, an oil pump, a relief valve, and a reversing valve to provide pressure oil for the proportional solenoid valve group. The controller receives information from each position sensor and controls the proportional solenoid valve group to ensure that the four lifting cylinders rise and fall synchronously.

[0007] Compared with the background technology, the utility model has the following beneficial effects: due to the adoption of the above technical solution, the bottom of the oil cylinder is fixed with a fixed plate, and the top is connected to the cover body with a joint bearing to lift the cover body. Compared with the reducer with chain transmission, the layout is flexible and not limited by the bottom space of the steamer; the connection between the top of the oil cylinder and the steamer cover body is a joint bearing, which can adapt to the working condition that the four oil cylinders are not completely synchronized when the steamer cover body is lifted; the pull-wire sensor is used to detect the extension length of the oil cylinder piston rod; the balance valve is directly installed on the oil cylinder, which can avoid the leakage of the oil cylinder to the greatest extent and realize the locking of the oil cylinder at any position; the four proportional solenoid valves of the proportional solenoid valve group can respectively control the flow rate to each oil cylinder; the position of the power unit is not restricted and the layout is convenient; the controller receives the information of each position sensor, controls the proportional solenoid valve group, and ensures the synchronous lifting of the four lifting oil cylinders. The utility model achieves the purpose of improving lifting reliability, increasing layout convenience, and improving lifting synchronization. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is the front view of the utility model.

[0009] Figure 2 It is a top view of the utility model.

[0010] Figure 3 It is a single schematic diagram of four lifting cylinders with position sensors of the utility model.

[0011] Figure 4 It is a working logic diagram of the utility model. DETAILED DESCRIPTION

[0012] Example 1, reference Figure 1 , Figure 2 , Figure 3 , Figure 4 A high-precision steaming and baking machine hood lifting device, characterized in that: four lifting cylinders 1 with position sensors are connected to a balance valve 2, the balance valve 2 is connected to a proportional solenoid valve group 3, the proportional solenoid valve group 3 is connected to a power unit 4, and a controller 5 is electrically connected to the proportional solenoid valve group 3 and the four lifting cylinders 1 with position sensors; each of the four lifting cylinders 1 with position sensors has a rodless cavity and a rod cavity cylinder 7 and an external wire sensor 8, a fixing plate 10 is arranged at the bottom of the cylinder 7 with a rodless cavity and a rod cavity, and a rodless cavity cylinder 7 has a rodless cavity. The connection between the top of the oil cylinder 7 with a rod cavity and the steam-bake machine cover 6 is a joint bearing 9; the balancing valve 2 is directly installed on the oil cylinder 7 with a rodless cavity and a rod cavity; the four proportional solenoid valves of the proportional solenoid valve group 3 respectively control the flow rate to each oil cylinder 7 with a rodless cavity and a rod cavity; the power unit 4 includes an oil tank, a motor, an oil pump, a relief valve, and a reversing valve to provide pressurized oil for the proportional solenoid valve group 3; the controller 5 receives information from each position sensor, controls the proportional solenoid valve group 3, and ensures that the four lifting cylinders 1 rise and fall synchronously.

[0013] The controller 5 in this embodiment can be installed in the electric control cabinet, the position of the power unit 4 is not restricted, and the layout is convenient; the bottom of the cylinder 7 is fixed with a fixing plate 10, and the top is lifted by a spherical bearing 9. Compared with the reducer with chain transmission, the layout is flexible and not limited by the bottom space of the steamer; the top of the cylinder 7 with a rodless cavity and a rod cavity is connected to the steamer cover 6 with a spherical bearing 9, which can adapt to the working condition that the four cylinders are not completely synchronized when the steamer cover 6 is raised and lowered; the pull-wire sensor 8 is used to detect the extension length of the cylinder piston rod; the balancing valve 2 is directly installed on the cylinder 7 with a rodless cavity and a rod cavity, which can avoid leakage of the cylinder to the greatest extent and realize the cylinder staying and locking at any position.

[0014] During operation, the power unit 4 is started to output pressure oil to the proportional solenoid valve group 3, and the proportional solenoid valve group 3 transmits the pressure oil to the four lifting cylinders 1 with position sensors through the balance valve 2 to realize the lifting and lowering of the steam-bake machine hood 6. The controller 5 sets the current of one of the proportional solenoid valves that controls the cylinder 7 with a rodless cavity and a rod cavity to a fixed value. The fixed value is calculated according to the required lifting speed of the hood. When the steam-bake machine hood 6 is lifted or lowered, the controller 5 monitors the extension length of the piston rods of the four cylinders in real time through the pull-wire sensor 8, controls the current of each coil of the other three proportional solenoid valves, and compensates for the other three cylinders.

Claims

1. A high-precision steaming and baking machine cover lifting device, characterized in that: The four lifting cylinders (1) with position sensors are connected to the balancing valve (2), the balancing valve (2) is connected to the proportional solenoid valve group (3), the proportional solenoid valve group (3) is connected to the power unit (4), and the controller (5) is electrically connected to the proportional solenoid valve group (3) and the four lifting cylinders (1) with position sensors.

2. According to claim 1, a high-precision steaming and baking machine cover lifting device is characterized in that Each of the four lifting cylinders (1) with position sensors has a cylinder (7) with a rodless cavity and a rod cavity and an external pull-wire sensor (8). A fixing plate (10) is provided at the bottom of the cylinder (7) with a rodless cavity and a rod cavity. A joint bearing (9) is provided at the top of the cylinder (7) with a rodless cavity and a rod cavity and at the connection point with the steaming and baking machine cover (6).

3. A high-precision steaming and baking machine cover lifting device according to claim 1 or 2, characterized in that The balancing valve (2) is directly mounted on the oil cylinder (7) having a rodless chamber and a rod chamber.

4. A high-precision steaming and baking machine cover lifting device according to claim 1 or 2, characterized in that The four proportional solenoid valves of the proportional solenoid valve group (3) respectively control the flow rate to each oil cylinder (7) having a rodless cavity and a rod cavity.

5. According to claim 3, a high-precision steaming and baking machine cover lifting device is characterized in that The four proportional solenoid valves of the proportional solenoid valve group (3) respectively control the flow rate to each oil cylinder (7) having a rodless cavity and a rod cavity.

6. A high-precision steaming and baking machine cover lifting device according to claim 1 or 2, characterized in that The power unit (4) comprises an oil tank, a motor, an oil pump, a relief valve, and a reversing valve to provide pressure oil for the proportional solenoid valve group (3).

7. The high-precision steaming and baking machine cover lifting device according to claim 3, characterized in that The power unit (4) comprises an oil tank, a motor, an oil pump, a relief valve, and a reversing valve to provide pressure oil for the proportional solenoid valve group (3).

8. The high-precision steaming and baking machine cover lifting device according to claim 4, characterized in that The power unit (4) comprises an oil tank, a motor, an oil pump, a relief valve, and a reversing valve to provide pressure oil for the proportional solenoid valve group (3).

9. A high-precision steaming and baking machine cover lifting device according to claim 1 or 2, characterized in that: The controller (5) receives information from each position sensor and controls the proportional solenoid valve group (3) to ensure that the four lifting cylinders (1) rise and fall synchronously.

10. The high-precision steaming and baking machine cover lifting device according to claim 3, characterized in that: The controller (5) receives information from each position sensor and controls the proportional solenoid valve group (3) to ensure that the four lifting cylinders (1) rise and fall synchronously.

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