Vacuum degree monitoring assembly for PET (Polyethylene Terephthalate) reaction kettle

Abstract

The utility model relates to the technical field of vacuum degree monitoring, and particularly discloses a PET reaction kettle vacuum degree monitoring assembly which comprises a reaction kettle, a circuit pipe and an insulating shell, the insulating shell is internally provided with a monitoring assembly, the upper end of the reaction kettle is fixedly connected with the insulating shell, and the lower end of the reaction kettle is fixedly connected with the circuit pipe. A plurality of air holes are formed in the lower end of the insulating shell, the monitoring assembly comprises a main shielding cover, a sealing plate, a static conducting rod and a fixing rod, the sealing plate is fixedly connected with an air spring, the other end of the air spring is fixedly connected with a movable end cover plate, the movable end cover plate is slidably connected with a movable conducting rod, and the upper end of the movable conducting rod is fixedly connected with a movable contact; the vacuum degree monitoring device has the beneficial effects that the vacuum degree in the reaction kettle can be monitored, and when air leakage occurs, the air spring ascends quickly, and the current path turns on the alarm lamp, so that the vacuum degree of the reaction kettle can be monitored quickly and alarmed.

Description

TECHNICAL FIELD

[0001] The utility model relates to vacuum monitoring technical field, concretely is a kind of PET reaction kettle vacuum degree monitoring subassembly. BACKGROUND

[0002] In modern chemical production field, PET is a widely used synthetic polymer material, for producing various packaging containers, fiber products and films etc. In its production process, reaction kettle is used to realize efficient polymerization, pure synthesis. In the production process in PET reaction kettle, the accurate control of vacuum degree is not only the key factor to ensure product quality, but also the important prerequisite to ensure production efficiency and safety.

[0003] Chinese patent CN208554172U discloses a simple reaction kettle vacuum degree control device, characterized in that it comprises a vacuum pump connected with the reaction kettle, a gas pipe connected between the vacuum pump and the reaction kettle, and a proportional control valve arranged on the gas pipe. The vacuum degree is controlled by adjusting the opening degree of the proportional control valve. The utility model has the advantages of simple structure and convenient operation.

[0004] However, the above-mentioned patent cannot quickly monitor and warn when the reaction kettle is not completely sealed. When subsequent inspection is carried out, it has already caused great loss. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a PET reaction kettle vacuum degree monitoring subassembly to solve the problems in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a PET reaction kettle vacuum degree monitoring subassembly, comprising: a reaction kettle, a circuit pipe and an insulating shell, the insulating shell contains a monitoring subassembly, the upper end of the reaction kettle is fixedly connected with the insulating shell, the lower end of the insulating shell is provided with a plurality of air holes, the monitoring subassembly comprises: a main shielding cover, a sealing plate, a static conductive rod and a fixing rod, the sealing plate is fixedly connected with an air spring, the other end of the air spring is fixedly connected with a moving end cover plate, the moving end cover plate is slidably connected with a moving conductive rod, the upper end of the moving conductive rod is fixedly connected with a moving contact, a static end cover plate is slidably installed on the inner wall of the insulating shell, the static conductive rod is fixedly connected with a static contact through the insulating shell and the static end cover plate, the upper end of the main shielding cover is fixedly connected with the lower end of the static end cover plate, the lower end of the main shielding cover is fixedly connected with the upper end of the moving end cover plate, one end of the circuit pipe is fixedly connected with an alarm lamp, the other end is electrically connected with the moving conductive rod and the static conductive rod through the insulating shell, and one end of the fixing rod is fixedly connected with the moving conductive rod through the insulating shell and the reaction kettle.

[0007] Preferably, the monitoring assembly is closed by the rubber strip, the static contact and the moving contact are equal in size and in contact with each other, the static contact and the moving contact are arranged in the main shielding cover, and the main shielding cover is always in a vacuum state.

[0008] Preferably, the moving end cover plate is in sliding connection with the insulating shell, and the static conductive rod is in fixed connection with the insulating shell.

[0009] Preferably, the air spring is provided with two air springs, and the two air springs contain equal amounts of compressed air and are always in an expanded state.

[0010] Preferably, the lower end of the sealing plate is fixedly connected with the insulating shell, and the sealing plate is provided with two sealing plates which are equal in size.

[0011] Preferably, the plurality of air holes are equal in size and smaller in diameter than the diameter of the fixing rod.

[0012] Compared with the prior art, the utility model has the beneficial effects that: the vacuum degree in the reaction kettle can be monitored through the vacuum arc-extinguishing chamber, when air leakage occurs, the air spring will quickly rise, the current path is opened, and the alarm lamp is turned on, so that the vacuum degree in the reaction kettle can be quickly monitored and alarmed. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic view of the structure of the utility model;

[0014] Figure 2 It is a left view schematic view of the monitoring assembly of the structure of the utility model;

[0015] Figure 3 It is a three-dimensional schematic view of the monitoring assembly of the structure of the utility model;

[0016] Figure 4 It is a front view schematic view of the monitoring assembly of the structure of the utility model;

[0017] In the drawing: 1, reaction kettle; 2, alarm lamp; 3, line pipe; 4, insulating shell; 5, moving end cover plate; 6, air spring; 7, air hole; 8, fixing rod; 9, main shielding cover; 10, static conductive rod; 11, static contact; 12, moving contact; 13, moving conductive rod; 14, static end cover plate; 15, sealing plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme of the utility model, carry out clearly, complete description, and the advantage is more clear and distinct, the following combining with the drawing to the utility model embodiment carries out further detailed explanation.Should understand, the specific embodiment described here is a part of the embodiment of the utility model, rather than all the embodiments, only to explain the embodiment of the utility model, and is not used to limit the embodiment of the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0019] Please refer to Figures 1-4 The utility model provides a technical scheme: a kind of PET reaction kettle vacuum degree monitoring assembly, comprising: reaction kettle 1, line pipe 3 and insulating shell 4, insulating shell 4 contains monitoring assembly, the upper end of the reaction kettle 1 is fixedly connected with insulating shell 4, it is convenient to monitor the vacuum degree in reaction kettle 1 for long, the lower end of insulating shell 4 is equipped with several air holes 7, the diameter of air hole 7 is less than fixed rod 8, so it can be synchronous reaction kettle 1 and the air pressure of monitoring assembly, the monitoring assembly includes: main shield 9, airtight plate 15, static electrically-conductive rod 10 and fixed rod 8, airtight plate 15 is fixedly connected with air spring 6, air spring 6 is provided with two, and all contain equal amount of compressed air, always be in expanded state, the other end of air spring 6 is fixedly connected with dynamic end cover plate 5, when dynamic end cover plate 5 moves downward, air spring 6 will be compressed, increase its elasticity, dynamic end cover plate 5 is slidably connected with dynamic electrically-conductive rod 13, the upper end of dynamic electrically-conductive rod 13 is fixedly connected with dynamic contact 12, can be powered to dynamic contact 12 by dynamic electrically-conductive rod 13, static end cover plate 14 is slidably installed in the inner wall of insulating shell 4, it is convenient to balance pressure, static electrically-conductive rod 10 is fixedly connected with static contact 11 through insulating shell 4 and static end cover plate 14, static contact 11 and dynamic contact 12 are equal in size and initial state is mutually contacted, the lower end of static end cover plate 14 is fixedly connected in the upper end of main shield 9, the upper end of main shield 9 is fixedly connected in the lower end of dynamic end cover plate 5, by this connection mode, the vacuum state can be kept in main shield 9, one end of line pipe 3 is fixedly connected with alarm lamp 2, the other end is electrically connected with dynamic electrically-conductive rod 13 and static electrically-conductive rod 10 through insulating shell 4, to form closed loop, one end of fixed rod 8 is fixedly connected with dynamic electrically-conductive rod 13 through insulating shell 4 and reaction kettle 1, to monitor the air pressure in reaction kettle 1.

[0020] Monitoring assembly is all closed installation of rubber strip, avoid due to component leakage to cause monitoring not accurate, static contact 11 and dynamic contact 12 are all arranged in main shield 9, form vacuum arc chamber.

[0021] Dynamic end cover plate 5 and insulating shell 4 are slidably connected, when the vacuum pressure in reaction kettle 1 changes, dynamic end cover plate 5 will move, static electrically-conductive rod 10 is fixedly connected with insulating shell 4.

[0022] The lower end of the sealing plate 15 is fixedly connected with the insulating shell 4, so that the air spring 6 is kept stable, the sealing plate 15 is provided with two and is equal in size, and the air spring 6 is prevented from being unevenly stressed.

[0023] In actual use, after the monitoring assembly is installed, the reaction kettle 1 is opened and vacuumizing is started, in the process, under the action of air pressure, the monitoring assembly will gradually move to the reaction kettle 1 direction as the pressure in the reaction kettle 1 gradually decreases, when the dynamic end cover plate 5 moves to the reaction kettle 1, the air spring 6 is stressed and compressed, at the same time, the dynamic contact 12 is driven to move to the reaction kettle 1 and no longer contacts with the static contact 11, when the reaction kettle 1 is vacuumized, the monitoring assembly is stably stressed, at this time, the static conductive rod 10 is electrified, when the reaction kettle 1 leaks, the pressure in the reaction kettle 1 gradually rises, the dynamic end cover plate 5 starts to move away from the reaction kettle 1 under the action of the air spring 6 and atmospheric pressure, so as to drive the dynamic contact 12 to move to contact with the static contact 11, at this time, the power supply forms a loop, the alarm lamp 2 automatically starts to alarm, so as to achieve the monitoring purpose.

[0024] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A PET reactor vacuum monitoring assembly, characterized in that: The PET reactor vacuum monitoring assembly includes a reactor (1), a circuit tube (3) and an insulating shell (4), the insulating shell (4) contains a monitoring assembly, the upper end of the reactor (1) is fixedly connected with the insulating shell (4), the lower end of the insulating shell (4) is provided with a plurality of air holes (7), and the monitoring assembly includes a main shielding cover (9), a sealing plate (15), a static conductive rod (10) and a fixed rod (8).

2. The PET reactor vacuum monitoring assembly of claim 1, wherein: The monitoring assembly is closed and installed by the adhesive tape, the static contact (11) and the dynamic contact (12) are equal in size and in contact with each other, the static contact (11) and the dynamic contact (12) are arranged in the main shielding cover (9), and the main shielding cover (9) is always in a vacuum state.

3. The PET reactor vacuum monitoring assembly of claim 2, wherein: The dynamic end cover plate (5) is slidably connected with the insulating shell (4), and the static conductive rod (10) is fixedly connected with the insulating shell.

4. The PET reactor vacuum monitoring assembly of claim 3, wherein: The air spring (6) is provided with two equal amounts of compressed air and is always in an expanded state.

5. The PET reactor vacuum monitoring assembly of claim 4, wherein: The lower end of the sealing plate (15) is fixedly connected with the insulating shell (4), and the sealing plate (15) is provided with two equal sizes.

6. The PET reactor vacuum monitoring assembly of claim 5, wherein: The plurality of air holes (7) are equal in size, and the diameter is smaller than the diameter of the fixed rod (8).

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