CN216917710U

CN216917710U - Mechanical hysteresis type vacuum maintaining energy-saving control device

Info

Publication number: CN216917710U
Application number: CN202220499306.6U
Authority: CN
Inventors: 程广云
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-07-08
Anticipated expiration: 2032-03-09

Abstract

The invention discloses a mechanical hysteresis type vacuum maintaining energy-saving control device, which comprises a high-pressure air source, an electromagnetic valve, a vacuum generator and a sucker, wherein the electromagnetic valve, the vacuum generator and the sucker are sequentially connected with the high-pressure air source through an air pipe; the valve rod of the first air valve is connected with the piston rod of the first air cylinder, the first air cylinder is communicated with the air pipe between the one-way valve and the sucker through the air pipe, and a spring is sleeved on the piston rod and the valve rod between the first air cylinder shell and the first air valve shell. The invention realizes the pressure maintaining state of the sucking disc by controlling the on-off of the air valve through the air pressure change of the air passage in the operation process in a mechanical mode, shortens the working time of the vacuum generator, saves the control operation of the air valve additionally and realizes the energy saving in multiple aspects.

Description

Mechanical hysteresis type vacuum maintaining energy-saving control device

Technical Field

The invention relates to the field of manufacturing, in particular to a control device of a vacuum chuck for sucking an object in an automatic production process.

Background

In industrial automation, a large number of vacuum suction cups are used as terminal actuating mechanisms, and negative pressure is generated in two ways, namely, a vacuum suction pump is connected with the vacuum suction cups after being switched by an electromagnetic valve; and secondly, a high-pressure air source supplied by the air compressor is controlled by the electromagnetic valve, and negative pressure is generated by the vacuum generator and then is connected to the vacuum chuck. The vacuum pump is energy-saving, but the vacuum pump may need to be prepared separately, and the vacuum generator can utilize the original air compressor of the electric system, so the realization is convenient and simple, but the defect is that the energy consumption is larger, and the efficiency is only about 25 percent of the air extraction scheme. Meanwhile, when the vacuum generator is used, when the negative pressure is in place, if the leakage amount between the sucker and the workpiece is small, the gas can be continuously supplied, a high-pressure gas source is greatly wasted, the gas consumed by a nozzle of the vacuum generator with the diameter of 1 mm under a common low-power gas source needs to be maintained by 1 kilowatt, and the energy consumption is extremely high.

Disclosure of Invention

The invention aims to provide a sucker energy-saving control device, which can realize vacuum as required in the automatic production process and realize energy conservation.

In order to achieve the purpose, the technical scheme provided by the invention is that the mechanical hysteresis type vacuum maintaining energy-saving control device comprises a high-pressure air source, an electromagnetic valve, a vacuum generator and a sucker, wherein the electromagnetic valve, the vacuum generator and the sucker are sequentially connected with the high-pressure air source through an air pipe; the valve rod of the first air valve is connected with the piston rod of the first air cylinder, the first air cylinder is communicated with the air pipe between the one-way valve and the sucker through the air pipe, and a spring is sleeved on the piston rod and the valve rod between the first air cylinder shell and the first air valve shell.

Preferably, a vacuum breaking air path is arranged between the electromagnetic valve and the sucker, the vacuum breaking air path comprises a second air valve and a second air cylinder connected with the second air valve, one end of the air valve is communicated with the air pipe between the one-way valve and the sucker, and the other end of the air valve is communicated with the atmosphere; the second air cylinder is communicated with an air pipe between the electromagnetic valve and the first air valve; and a spring is sleeved on the piston rod and the valve rod between the second cylinder shell and the second air valve shell.

Preferably, an adjusting nut is provided between the spring and the cylinder housing.

Preferably, the cylinder is connected with the valve rod of the air valve through a fixing pin.

Preferably, the first cylinder shell is divided into two cavities through a sealing ring, the cavity where the piston rod is located is communicated with the sucker air passage, the other cavity is provided with an exhaust hole, and the opening diameter of the cavity communicated with the sucker is larger than the diameter of the exhaust hole.

Preferably, the second cylinder shell is divided into two cavities by a sealing ring, the cavity where the piston rod is located is provided with an exhaust hole, the other cavity is communicated with an air pipe between the electromagnetic valve and the first air valve, and the opening diameter of the cavity communicated with the air pipe is larger than the diameter of the exhaust hole of the cavity where the piston rod is located.

The invention realizes the pressure maintaining state of the sucking disc by controlling the on-off of the air valve through the air pressure change of the air passage in the operation process in a mechanical mode, shortens the working time of the vacuum generator, saves the control operation of the air valve additionally and realizes the energy saving in multiple aspects.

Drawings

Fig. 1 is a schematic structural view.

FIG. 2 is a schematic view showing the connection of the first cylinder and the first air valve with the suction cup and the electromagnetic valve.

FIG. 3 is a schematic view showing the connection of the second cylinder and the second air valve with the suction cup and the electromagnetic valve.

Detailed Description

For the above technical solutions, preferred embodiments are described in detail with reference to the drawings, and refer to fig. 1 to 3.

The mechanical hysteresis type vacuum maintaining energy-saving control device comprises a high-pressure air source 1, an electromagnetic valve 2, a first air valve 3, a first air cylinder 4, a vacuum generator 5, a one-way valve 6, a sucker 7, a second air valve 8 and a second air cylinder 9. The high-pressure air source 1 is generally an air compressor. High-pressure air source 1 is communicated through air pipe electromagnetic valve 2, electromagnetic valve 2 is connected with input end 31 of first air valve 3 through the air pipe, output end 32 of first air valve 3 is connected with high-pressure air source input end of vacuum generator 5 through the air pipe, sealing washer 30 of first air valve is connected or is disconnected input end 31 and output end 32 through valve rod drive.

The vacuum generator 5 is connected with the one-way valve 6 through an air pipe, and the one-way valve 6 is connected with the sucker 7 through an air pipe. The electromagnetic valve 2 controls the on-off of the whole gas circuit. The valve stem of the first valve 3 is connected to the piston rod of the first cylinder 4 by a fixing pin. A four-way valve (not shown) is provided in the air pipe between the check valve 6 and the suction cup 7. The inner chamber of the housing of the first cylinder 4 is divided into a first cavity 45 and a second cavity 46 by a sealing ring 44. The piston rod is inserted into the first cavity 45. The first cavity is provided with an air port 451, and the air port 451 is communicated with an opening of the four-way valve through an air pipe. The housing wall of the second cavity is provided with an exhaust hole 461 communicating with the external environment. The diameter of the gas port 451 is much larger than the diameter of the gas discharge hole 461. An adjusting nut 41 is arranged on the piston rod close to one end of the first cylinder shell, a spring 42 is sleeved on the periphery of the piston rod and the valve rod between the first cylinder shell and the adjusting nut, and the air pressure action point is adjusted through the position of the adjusting nut 41 on the piston rod.

The other opening of the four-way valve is communicated with an opening 81 of the second air valve 8 through an air pipe, so that the second air valve 8 is communicated with the sucker air passage, and the other opening 82 of the second air valve 8 is communicated with the atmosphere. The second air valve 8 comprises a sealing ring 80 arranged in the shell, a valve rod is connected with the sealing ring, and the valve rod of the second air valve 8 is connected with a piston rod of the second air cylinder 9 through a fixing pin. The inner chamber of the second cylinder 9 is divided into a first cavity 95 and a second cavity 96 by a sealing ring 94. The piston rod is disposed through the second cavity 96. An air port 951 is formed in the first cavity 95, and the air port 951 is communicated with an air pipe between the electromagnetic valve 2 and the first air valve 3 through the air pipe. An exhaust hole 961 communicating with the external environment is opened in the housing wall of the second cavity. The diameter of the gas port 951 is much larger than the diameter of the vent hole 961. An adjusting nut 91 is arranged on the piston rod close to one end of the second air valve shell, a spring 92 is sleeved on the periphery of the piston rod and the valve rod between the second air valve shell and the adjusting nut 91, and the air pressure action point is adjusted through the position of the adjusting nut 91 on the piston rod.

The working process of the invention is as follows:

and starting the air compressor, wherein the air compressor always works in the whole working process of the sucker to provide a high-pressure air source for the air path. The control solenoid valve is opened, and through manually pressing down first pneumatic valve rod, when opening first pneumatic valve, also stimulate first cylinder piston rod action, the spring of first cylinder is in natural state this moment, and atmospheric pressure is atmospheric pressure in the cavity in the cylinder casing, and sealing washer both sides cavity atmospheric pressure in the cylinder is in balanced state. The second air valve is closed by the second air cylinder under the action of high-pressure air, and the air path between the second air cylinder and the sucker is not communicated. Open vacuum generator, vacuum generator works, carry out evacuation work, form the negative pressure in sucking disc department, when the sucking disc absorbs the work piece, vacuum generator also forms the negative pressure in the cavity to first cylinder inner piston rod place through the evacuation, along with air pressure unbalance in the sealing washer both sides cavity in the cylinder, first cylinder piston rod drives the valve rod motion, when the vacuum of sucking disc department and first cylinder piston rod place cavity reaches a definite value, first air valve is closed to the piston rod drive valve rod of first cylinder, stop for the vacuum generator air feed, vacuum generator is out of work, at this moment, because the check valve, keep vacuum between sucking disc and work piece. At this time, the second air valve is still in a closed state because the electromagnetic valve is not closed. Because there may be less gas leakage between the contact surface between sucking disc and the work piece, when the vacuum of sucking disc department reduces certain vacuum, this moment, the sucking disc still keeps the state of absorbing the work piece, in order to prevent that the work piece from dropping, when setting for the cavity vacuum when first cylinder is less than a definite value, at this moment, first cylinder drives the piston rod motion under spring force and atmospheric pressure effect and opens first pneumatic valve, for vacuum generator air feed, vacuum generator evacuation, improve the vacuum of sucking disc department, when the vacuum of sucking disc department reaches certain setting value, then the piston rod motion of first cylinder is in place and just closes first pneumatic valve, continue to carry out the pressurize work. When the sucking disc sucks the workpiece to the position for placing the workpiece, the control electromagnetic valve is closed, high-pressure gas is no longer provided for the inner chamber of the second air cylinder, the second air cylinder drives the valve rod of the second air valve to move under the action of the elastic force of the spring, the second air valve is opened, air enters the sucking disc to break vacuum, and the sucking disc puts down the workpiece along with the breaking of vacuum. The piston rod of the first air cylinder drives the first air valve to open under the action of air pressure and spring force, and at the moment, the electromagnetic valve is closed, no high-pressure air source passes through the first air valve, and the vacuum generator does not work. When the sucker moves to the position for sucking the workpiece from the position for placing the workpiece again, the electromagnetic valve is opened, the high-pressure air source enters the vacuum generator through the first air valve, the vacuum is pumped, and the work is repeated.

In the device design of the invention, the displacement distance of the piston rod is required to be in direct proportion to the stress. The elastic force of the spring is adjusted through the adjusting nut, so that the stroke distance of the piston rod is adjusted.

Claims

1. The mechanical hysteresis type vacuum-maintaining energy-saving control device comprises a high-pressure air source, and an electromagnetic valve, a vacuum generator and a sucker which are sequentially connected with the high-pressure air source through an air pipe, and is characterized in that a first air valve is arranged on the air pipe between the electromagnetic valve and the vacuum generator, and a one-way valve is arranged between the vacuum generator and the sucker; the valve rod of the first air valve is connected with the piston rod of the first air cylinder, the first air cylinder is communicated with the air pipe between the one-way valve and the sucker through the air pipe, and a spring is sleeved on the piston rod and the valve rod between the first air cylinder shell and the first air valve shell.

2. The mechanical hysteresis type vacuum-holding energy-saving control device according to claim 1, wherein a vacuum breaking gas circuit is arranged between the electromagnetic valve and the sucker, the vacuum breaking gas circuit comprises a second gas valve and a second cylinder connected with the second gas valve, one end of the gas valve is communicated with the gas pipe between the one-way valve and the sucker, and the other end of the gas valve is communicated with the atmosphere; the second air cylinder is communicated with an air pipe between the electromagnetic valve and the first air valve; and a spring is sleeved on the piston rod and the valve rod between the second cylinder shell and the second air valve shell.

3. The mechanically delayed vacuum hold energy saving control device according to claim 1 or 2, wherein an adjusting nut is provided between the spring and the cylinder housing.

4. The mechanical hysteresis type vacuum holding energy-saving control device as claimed in claim 1 or 2, wherein the cylinder is connected with the valve rod of the air valve through a fixing pin.

5. The mechanical hysteresis type vacuum-holding energy-saving control device as claimed in claim 1, wherein the first cylinder housing is separated into two cavities by a sealing ring, the cavity where the piston rod is located is communicated with the suction cup air passage, the other cavity is provided with an exhaust hole, and the opening diameter of the cavity communicated with the suction cup is larger than the diameter of the exhaust hole.

6. The mechanical hysteresis type vacuum-holding energy-saving control device according to claim 2, wherein the second cylinder housing is divided into two cavities by a sealing ring, the cavity where the piston rod is located is provided with an exhaust hole, the other cavity is communicated with an air pipe between the electromagnetic valve and the first air valve, and the opening diameter of the cavity communicated with the air pipe is larger than the diameter of the exhaust hole of the cavity where the piston rod is located.