Exhaust device for hollow blow molding equipment

Abstract

The utility model discloses an exhaust device for hollow blow molding equipment, which comprises an angle seat valve, a control structure is connected to the control end of the angle seat valve, and the air inlet end of the angle seat valve is connected with the exhaust end of a system; the control structure comprises a two-position two-way electromagnetic directional valve, the input end of the two-position two-way electromagnetic directional valve is communicated with a system main air inlet, and two paths of the output end of the two-position two-way electromagnetic directional valve are connected with a control port connector of the angle seat valve. The angle seat valve is a two-position two-way valve controlled externally, the valve is switched through additional pilot media, the valve is closed through spring force in the stop state, and the valve is opened when pilot pressure acts on the driver. And the pilot medium entering the driving cavity is controlled by an external two-way electromagnetic directional valve and then is discharged, so that the problem that the exhaust valve is blocked and damaged during air circulation of the plastic hollow machine can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding mechanical devices, in particular to an exhaust device for a hollow blow molding equipment. Background Art

[0002] A hollow molding machine is a device that blow molds a plastic preform through a mold. During the blow molding process, the mold compresses the preform through a high-pressure clamping cylinder, and the preform is formed by high-pressure blowing. In order to quickly cool the product, in addition to external water cooling of the product, it is also necessary to connect the high-pressure blowing and exhaust inside the product to form a gas circulation. During this process, plastic aerosol is formed inside the product due to high-pressure blowing and high heat of the preform. When the gas circulates, the aerosol is discharged through the exhaust valve. At present, most of the exhaust valves used in hollow molding machines are normally closed pilot-operated two-way solenoid valves. This valve has a diaphragm structure. It works by pushing the diaphragm or directly lifting the diaphragm by an electromagnetic coil through a pressure difference. After the high-heat aerosol is cooled by the exhaust valve, it will adsorb on the diaphragm and the inside of the valve cavity. After long-term operation, it will cause the exhaust valve to be blocked and damaged and cannot be used normally. Summary of the Utility Model

[0003] Aiming at the above defects or deficiencies, the purpose of the utility model is to provide an exhaust device for a hollow blow molding equipment, and solve the problem that the exhaust valve is blocked and damaged and cannot be used normally during the gas circulation process of the hollow machine.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] An exhaust device for a hollow blow molding equipment, comprising: an angle seat valve, a control structure is connected to the control end of the angle seat valve, and the intake end of the angle seat valve is connected to the system exhaust end; the control structure includes: a two-position two-way electromagnetic reversing valve, the input end of the two-position two-way electromagnetic reversing valve is communicated with the system total intake air, and two output paths of the two-position two-way electromagnetic reversing valve are respectively connected to the control port connectors of the angle seat valve.

[0006] A first control port connector and a second control port connector are arranged on the control end of the angle seat valve, and two output paths of the two-position two-way electromagnetic reversing valve are respectively connected to the first control port connector and the second control port connector.

[0007] A first quick connector is arranged on the intake port of the angle seat valve, and the first quick connector is connected to the system exhaust end.

[0008] An exhaust port connector is arranged on the exhaust port of the angle seat valve, and a first silencer is installed on the exhaust port connector.

[0009] The input end of the two-position two-way electromagnetic reversing valve is connected to the system intake air through a second quick connector.

[0010] On the two output paths of the two-way two-position electromagnetic directional control valve, third and fourth quick connectors are respectively arranged.

[0011] On the two-way two-position electromagnetic directional control valve, second and third silencers are installed.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] The present utility model provides an exhaust device for a hollow blow molding equipment, which controls exhaust through a two-way two-position electromagnetic directional control valve and an angle seat valve device. The angle seat valve is a two-way two-position valve controlled externally. Such a valve is switched through an additional pilot medium. When in the stop state, the valve is closed by the spring force, and when the pilot pressure acts on the actuator, the valve opens. The pilot medium entering the drive chamber is controlled by an external two-way electromagnetic directional control valve and then discharged, which can effectively solve the problem of blockage and damage of the exhaust valve during the air circulation of the plastic hollow machine. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the exhaust device of the present utility model for a hollow blow molding equipment;

[0015] Figure 2 is a pneumatic control schematic diagram of the present utility model.

[0016] In the figure, 1 - angle seat valve; 2 - two-way two-position electromagnetic directional control valve; 1.1 - second quick connector; 1.2 - first quick connector; 1.3 - third quick connector, 1.4 - fourth quick connector; 1.5 - first control port connector; 1.6 - second control port connector; 1.7 - exhaust port connector; 2.1 - second silencer; 2.2 - first silencer; 2.3 - third silencer. Detailed Embodiment

[0017] Hereinafter, the present utility model will be described in detail with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] As Figure 1 shown, the present utility model provides an exhaust device for a hollow blow molding equipment, which is characterized in that it includes: an angle seat valve 1, a control structure is connected to the control end of the angle seat valve 1, and the intake end of the angle seat valve 1 is connected to the system exhaust end; the control structure includes: a two-way two-position electromagnetic directional control valve 2, the input end of the two-way two-position electromagnetic directional control valve 2 is communicated with the system total intake air, and the two output paths of the output end of the two-way two-position electromagnetic directional control valve 2 are respectively connected to the control port connectors of the angle seat valve 1.

[0019] Specifically, a first control port connector 1.5 and a second control port connector 1.6 are provided on the control end of the angle seat valve 1, and two output paths of the two-position two-way electromagnetic reversing valve 2 are respectively connected to the first control port connector 1.5 and the second control port connector 1.6. A first quick connector 1.2 is provided on the air inlet of the angle seat valve 1, and the first quick connector 1.2 is connected to the system exhaust end.

[0020] In addition, in the present utility model, an exhaust port connector 1.7 is provided on the exhaust port of the angle seat valve 1, a first silencer 2.2 is installed on the exhaust port connector 1.7, and the exhaust end of the angle seat valve 1 is connected to the first silencer 2.2 and discharged into the air.

[0021] In the present utility model, system intake air is also connected to the input end of the two-position two-way electromagnetic reversing valve 2 through a second quick connector 1.1. Third and fourth quick connectors 1.3 and 1.4 are respectively provided on the two output paths of the two-position two-way electromagnetic reversing valve 2. Second and third silencers 2.1 and 2.3 are installed on the two-position two-way electromagnetic reversing valve 2.

[0022] As Figure 2 shown in the pneumatic control schematic diagram, the exhaust device solution of a hollow blow molding equipment of the present utility model includes: a two-position two-way electromagnetic reversing valve, an angle seat valve, a silencer, etc. The angle seat valve is a two-position two-way valve controlled externally, and such a valve is switched by an additional pilot medium. When in the stopped state, the valve is closed by the spring force, and when the pilot pressure acts on the actuator, the valve opens. The pilot medium entering the drive chamber is controlled by an external two-way electromagnetic reversing valve and then discharged through the silencer. The internal material of the angle seat valve is gunmetal or stainless steel. This kind of exhaust system is not sensitive to steam or slightly dirty media, there is no need for a pressure difference between the inlet and the outlet, the flow resistance is small, and there is no dead cavity. It can effectively solve the problem of blockage and damage of the exhaust valve during the air circulation of the plastic hollow machine.

[0023] The working process of the present utility model is as follows:

[0024] System exhaust enters the air inlet end of the angle seat valve 1 through the first quick connector 1.2. The exhaust port of the angle seat valve 1 is connected to the exhaust through the exhaust port connector 1.7 and the first silencer 2.2. The two-position two-way electromagnetic reversing valve 2 is connected to the system intake air through the first quick connector 1.1, and controls the opening and closing of the angle seat valve 1 by connecting to the first control port connector 1.5 and the second control port connector 1.6 of the angle seat valve 1 through the third quick connector 1.3 and the fourth quick connector 1.4 respectively. The two-position two-way electromagnetic reversing valve 2 is connected to the second silencer 2.1 and the third silencer 2.3 for exhaust. Among them, the intake air of the control valve is the total intake air of the system, the intake air of the exhaust valve is the exhaust after high-pressure blowing of the plastic hollow machine, and the control valve and the exhaust valve start and stop simultaneously to complete the exhaust of the hollow blow molding equipment.

[0025] For those skilled in the art, it is obvious that the above specific factual examples are only the preferred solutions of the present utility model. Therefore, the improvements and changes that those skilled in the art may make to some parts of the present utility model still embody the principle of the present utility model and achieve the purpose of the present utility model, and all fall within the scope protected by the present utility model.

Claims

1. An exhaust device for hollow blow molding equipment, characterized in that: include: An angle seat valve (1), wherein a control structure is connected to the control end of the angle seat valve (1), and the air inlet end of the angle seat valve (1) is connected to the exhaust end of the system; the control structure comprises: a two-position two-way electromagnetic reversing valve (2), wherein the input end of the two-position two-way electromagnetic reversing valve (2) is connected to the total air inlet of the system, and two output ends of the two-position two-way electromagnetic reversing valve (2) are respectively connected to the control port connectors of the angle seat valve (1).

2. The exhaust device for hollow blow molding equipment according to claim 1, characterized in that: A first control port connector (1.5) and a second control port connector (1.6) are provided on the control end of the angle seat valve (1), and two output ends of the two-position two-way electromagnetic reversing valve (2) are respectively connected to the first control port connector (1.5) and the second control port connector (1.6).

3. The exhaust device for hollow blow molding equipment according to claim 1, characterized in that: A first quick-release plug connector (1.2) is provided on the air inlet of the angle seat valve (1), and the first quick-release plug connector (1.2) is connected to the exhaust end of the system.

4. The exhaust device for hollow blow molding equipment according to claim 1 or 3, characterized in that: An exhaust port connector (1.7) is provided on the exhaust port of the angle seat valve (1), and a first silencer (2.2) is installed on the exhaust port connector (1.7).

5. The exhaust device for hollow blow molding equipment according to claim 1, characterized in that: The input end of the two-position two-way electromagnetic reversing valve (2) is connected to the system air intake via a second quick-plug connector (1.1).

6. The exhaust device for hollow blow molding equipment according to claim 1 or 5, characterized in that: The output ends of the two-position two-way electromagnetic reversing valve (2) are respectively provided with a third and a fourth quick-connect connector (1.3, 1.4).

7. The exhaust device for hollow blow molding equipment according to claim 1 or 5, characterized in that: The two-position two-way electromagnetic reversing valve (2) is provided with a second and a third silencer (2.1, 2.3).

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