Automatic temperature control device for plunger type quick-opening curing tank

Abstract

The utility model relates to a kind of plunger quick-opening door vulcanization tank outer temperature automatic control device, belong to vulcanization device field. Quick-opening door plunger vulcanization tank installs outer temperature inlet pipeline, outer temperature inlet pipeline is equipped with first outer temperature inlet gate valve, first outer temperature inlet pneumatic cut-off valve, second outer temperature inlet gate valve, and parallel third outer temperature inlet gate valve, outer temperature inlet pneumatic diaphragm regulating valve, second outer temperature inlet pneumatic cut-off valve, quick-opening door plunger vulcanization tank upper outer temperature temperature pressure transmitter signal feedback is automatically controlled, quick-opening door plunger vulcanization tank bottom is equipped with outer temperature condensation recovery system, and outer temperature condensation recovery system is composed of first condensation recovery gate valve, condensation recovery pneumatic cut-off valve, second condensation recovery gate valve, installs capacitor liquid level controller on pipeline between first condensation recovery gate valve, condensation recovery pneumatic cut-off valve, and capacitor liquid level controller transmits signal to PLC control system according to water level height, and PLC control system issues instruction control by the on-off of solenoid valve by the gas source supplied by pneumatic triad.

Description

Technical Field

[0001] This utility model relates to the field of tire vulcanizing equipment, specifically a plunger-type quick-opening vulcanizing tank external temperature automatic control device. Background Technology

[0002] As is well known, in the tire manufacturing and processing field, there is a vulcanization process that uses a plunger-type quick-opening bladder vulcanizing tank. The characteristic of this plunger-type quick-opening bladder vulcanization is that the internal pressure is released from the top of the tank through a nozzle gasket seal between the molds, and a valve rod and conical sealing gasket seal between the mold exterior and the vulcanizing bladder, forming a circulation channel. External steam is controlled manually by the operator through a shut-off valve, and adjustments are made by observing the pressure and temperature. Condensate inside the vulcanizing tank, as well as any slight leakage of internal pressure due to poor sealing, is drained at fixed intervals by a timed condensate draining device at the bottom. With a fixed condensate draining interval and single condensate draining time, if the interval is too short or the single condensate draining time is too long, insufficient condensate in the tank will lead to wasted energy in the removal of external steam. However, if the operator fails to control the process properly or if there is a leak of too much internal pressure medium due to poor sealing, and the interval is too long or the single condensate draining time is too short, although energy waste can be reduced, the condensate cannot be drained in time within a fixed period. This will result in an increase in condensate in the vulcanizing tank, affecting the temperature inside the vulcanizing tank. Manually controlling the temperature and pressure through the valve will cause large fluctuations, directly affecting the internal and external quality defects of the product, posing a significant quality hazard, and resulting in a certain amount of energy waste. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this utility model provides an automatic external temperature control device for a plunger-type quick-opening vulcanizing tank. Through the automatic control system for external temperature steam inlet and the design of a capacitor-type liquid level controller to promptly discharge condensate from the tank, it solves the problem of large fluctuations in temperature and pressure inside the tank caused by manual operation, which directly affects the internal and external quality defects of the product, posing a great quality hazard and causing a certain amount of energy waste.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an automatic external temperature control device for a plunger-type quick-opening vulcanizing tank, comprising a quick-opening plunger vulcanizing tank, a plunger cylinder at the bottom of the quick-opening plunger vulcanizing tank, a plunger inside the plunger cylinder connected to the lower large plate inside the quick-opening plunger vulcanizing tank, the plunger cylinder mounted on a support base, and the main pipeline of the mold connected to the internal temperature circulation inlet pipeline and the internal temperature circulation return pipeline on the upper tank cover to form an internal temperature circulation system. The feature is that the quick-opening plunger vulcanizing tank is equipped with an external temperature inlet pipeline, which is equipped with a first external temperature inlet gate valve, a first external temperature inlet pneumatic shut-off valve, and a second external temperature inlet gate valve, and is also equipped in parallel with a third external temperature inlet gate valve, an external temperature inlet pneumatic diaphragm regulating valve, and a second external temperature inlet pneumatic shut-off valve. The external temperature and pressure are fed back through an external temperature and pressure transmitter installed on the quick-opening plunger vulcanizing tank. The system is automatically controlled. An external temperature condensation recovery system is installed at the bottom of the quick-opening plunger vulcanizing tank. The external temperature condensation recovery system consists of a first condensation recovery gate valve, a condensation recovery pneumatic shut-off valve, and a second condensation recovery gate valve. A capacitive level controller is installed on the pipeline between the first condensation recovery gate valve and the condensation recovery pneumatic shut-off valve. The capacitive level controller transmits signals to the PLC control system according to the water level. The PLC control system issues commands to control the gas source supplied by the pneumatic triplet to supply gas to the condensation recovery pneumatic shut-off valve for opening and closing via the solenoid valve. An external cooling inlet pipeline is installed on the quick-opening plunger vulcanizing tank between the external temperature inlet pipeline and the condensation recovery pipeline. A main discharge recovery pipeline and an emptying pipeline are provided at the bottom of the quick-opening plunger vulcanizing tank. All control systems are set and recorded on the industrial control computer interface.

[0005] The upper tank cover, upper transition plate, mold and lower large plate are sealed with a sealing gasket to prevent internal pressure from leaking into the quick-opening plunger vulcanizing tank.

[0006] The internal temperature circulation inlet pipe and the internal temperature circulation return pipe on the upper can cover are connected to the main pipeline of the mold using quick-connect fittings.

[0007] The beneficial effects of this utility model are that it ensures that a pneumatic shut-off valve is used to control the entry of external temperature steam. When the temperature and pressure sensor reaches the set temperature and pressure, the pneumatic diaphragm valve and the series pneumatic shut-off valve automatically open while the individually controlled pneumatic shut-off valve closes. The opening degree of the pneumatic diaphragm valve is adjusted in a timely manner through the signal feedback of the temperature and pressure sensor. The original condensate draining device is set to drain condensate only once when the mold is closed for the first time. The remaining entire vulcanization process is controlled by the newly added capacitive liquid level controller, which controls the pneumatic shut-off valve to drain condensate in the tank in a timely manner according to the liquid level signal. Attached Figure Description

[0008] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0009] Figure 1This utility model is shown in its non-working state.

[0010] Figure 2 This utility model is shown in a schematic diagram of the working preparation state.

[0011] Figure 3 This is a schematic diagram of the working state of this utility model.

[0012] Figure 4 This is an enlarged schematic diagram of the adjustment device of this utility model.

[0013] In the diagram: 1. Plunger cylinder, 2. Plunger, 3. Support seat, 4. Column, 5. Quick-opening plunger vulcanizing tank, 6. Lower large plate, 7. Mold, 8. Upper transition plate, 9. Upper tank cover, 10. Locking ring.

[0014] N1 is the inlet pipe for internal temperature circulation, and N2 is the return pipe for internal temperature circulation.

[0015] H1. First condensate recovery gate valve, H2. Condensate recovery pneumatic shut-off valve, H3. Second condensate recovery gate valve, H4. Main drain recovery pipeline, H5. Drain pipeline.

[0016] K1. Pneumatic triplet, K2. Solenoid valve, K3. PLC control system, K4. Capacitive liquid level controller, K5. Industrial computer.

[0017] W1. External temperature inlet pipe; W2. First external temperature inlet gate valve; W3. First external temperature inlet pneumatic shut-off valve; W4. Second external temperature inlet gate valve; W5. External temperature and pressure transmitter; W6. Third external temperature inlet gate valve; W7. External temperature inlet pneumatic diaphragm regulating valve; W8. Second external temperature inlet pneumatic shut-off valve; W9. External cooling inlet pipe. Detailed Implementation

[0018] In the figure, this utility model includes a quick-opening plunger vulcanizing tank 5. A plunger cylinder 1 is located at the bottom of the quick-opening plunger vulcanizing tank 5. A plunger 2 is installed inside the plunger cylinder 1 and connected to the lower large plate 6 inside the quick-opening plunger vulcanizing tank 5. The plunger cylinder 1 is mounted on a support base 3 and connected to the quick-opening plunger vulcanizing tank 5 via four uprights 4. Multiple molds 7 can be stacked simultaneously inside the quick-opening plunger vulcanizing tank 5 to form a mold group, depending on their different heights. It is connected to the upper tank cover 9 via an upper transition plate 8. The quick-opening plunger vulcanizing tank 5 is secured by a locking ring. 10. Lock and seal the upper tank cover 9 with the quick-opening plunger vulcanizing tank 5. Pressurize the mold assembly and the upper transition plate 8 by the plunger 2. The main pipeline of the mold 7 is connected to the internal temperature circulation inlet pipeline N1 and the internal temperature circulation return pipeline N2 on the upper tank cover 9 to form a circulation pipeline. The medium in the internal temperature circulation inlet pipeline N1 passes through the upper tank cover 9, the upper transition plate 8, the mold 7, and the lower large plate 6, and then circulates through another loop of the mold assembly, the upper transition plate 8, and the upper tank cover 9 to the internal temperature circulation return pipeline N2, forming an internal temperature circulation system. The quick-opening plunger vulcanizing tank 5 is equipped with an external temperature inlet pipe W1. The external temperature inlet pipe W1 is equipped with a first external temperature inlet gate valve W2, a first external temperature inlet pneumatic shut-off valve W3, and a second external temperature inlet gate valve W4. A third external temperature inlet gate valve W6, an external temperature inlet pneumatic diaphragm regulating valve W7, and a second external temperature inlet pneumatic shut-off valve W8 are also connected in parallel. Automatic control is achieved through signal feedback from an external temperature and pressure transmitter W5 installed on the quick-opening plunger vulcanizing tank 5. An external temperature condensation recovery system is installed at the bottom of the quick-opening plunger vulcanizing tank 5. This system consists of a first condensation recovery gate valve H1, a condensation recovery pneumatic shut-off valve H2, and a second condensation recovery gate valve H3. The first condensation recovery gate valve H1 and the condensation recovery pneumatic shut-off valve H3 are connected in parallel. A capacitive level controller K4 is added to the pipeline between valves H2. The capacitive level controller K4 transmits signals to the PLC control system K3 according to the water level. The PLC control system K3 issues commands to control the gas source supplied by the pneumatic triplet K1 to be supplied to the condensation recovery pneumatic shut-off valve H2 through the solenoid valve K2 to control the opening and closing of the gas. In order to ensure that the tire mold 7 can be rapidly cooled after vulcanization, an external cooling inlet pipeline W9 is added between the external temperature inlet pipeline W1 and the condensation recovery pipeline to the quick-opening plunger vulcanizing tank 5. The main discharge recovery pipeline H4 and the venting pipeline H5 are provided on the other side of the bottom of the quick-opening plunger vulcanizing tank 5. All control systems are set and recorded on the interface of the industrial control computer K5.

[0019] The upper tank cover 9, upper transition plate 8, mold assembly and lower large plate 6 are sealed with a special sealing gasket to prevent internal pressure from leaking into the quick-opening plunger vulcanizing tank 5.

[0020] The external temperature inlet system adopts a dual-loop design. During the initial pressurization period, it is controlled by an external temperature inlet pneumatic shut-off valve. When the pressure and temperature are close to the process standard, it switches to control by an external temperature inlet pneumatic diaphragm regulating valve. This is to solve the problems of the large tank volume that cannot supply the medium in time and the unstable temperature and pressure during the vulcanization process.

[0021] The external temperature inlet system uses a combination of pneumatic diaphragm regulating valve and series pneumatic shut-off valve for control. Considering the disadvantage that the pneumatic diaphragm regulating valve cannot completely cut off the medium, the series pneumatic shut-off valve can automatically cut off the medium when the pressure reaches the set upper limit value.

[0022] The capacitive liquid level controller K4 determines the liquid level by the change in capacitance and sends a signal to the PLC control system K3. Through the input signal, the CPU conversion, and the program control of the PLC control system, an output signal is sent to the solenoid valve to control the on / off of the air source, thereby controlling the opening or closing of the pneumatic shut-off valve, and thus using the liquid level to control the discharge of condensate.

[0023] The internal temperature circulation inlet pipe N1 and internal temperature circulation return pipe N2 on the upper can cover 9 are connected to the main pipe of the mold assembly by quick-connect fittings to ensure that the upper can cover 9 can be moved to a fixed storage area at any time.

[0024] The specific adjustment operation is as follows: The sulfur chemical operator manually opens the valve to raise the plunger 2 in the plunger cylinder 1, causing the lower large plate 6 to rise to the set height. The operator then stacks the molds 7 one by one on the lower large plate 6 to form a mold assembly and seals and centers it. Based on the height of the mold assembly in the quick-opening plunger vulcanizing tank 5, the operator closes the rising valve of the plunger 2 in the plunger cylinder 1, allowing the mold assembly to descend by its own weight. When the mold assembly is filled, the upper transition plate 8 is placed on the mold assembly and centered. After the upper tank cover 9 is closed, the locking ring 10 is locked in place, triggering the safety interlock switch. The sulfur chemical operator then manually opens the valve again to raise the plunger 2 in the plunger cylinder 1, ensuring that the lower large plate 6, mold assembly, upper transition plate 8, and upper tank cover 9 are always under pressure, forming a sealed internal circulation system. The automatic vulcanization button switch is activated. The program set in the industrial control computer K5 drives the PLC control system K3 to operate. Under the control of the PLC control system K3, the first external temperature inlet pneumatic shut-off valve W3 is opened, connecting with the first external temperature inlet gate valve W2 and the second external temperature inlet gate valve W4. This allows the steam medium from the external temperature inlet pipeline W1 to enter the quick-opening plunger vulcanizing tank 5. When the external temperature and pressure transmitter W5 signals that the temperature and pressure inside the quick-opening plunger vulcanizing tank 5 reach the process parameters set in the industrial control computer K5, the external temperature inlet pneumatic diaphragm regulating valve W7 and the second external temperature inlet pneumatic shut-off valve W8 connected in series on the same pipeline are automatically activated, while the first external temperature inlet pneumatic shut-off valve W3 is closed. This is controlled by the parameters set in the industrial control computer K5. The process parameters and PLC control system K3 automatically control the opening of the external temperature inlet diaphragm regulating valve W7, which is connected to the third external temperature inlet gate valve W6 and the second external temperature inlet diaphragm shut-off valve W8 to ensure stable regulation of temperature and pressure inside the quick-opening plunger vulcanizing tank 5. When the pressure inside the quick-opening plunger vulcanizing tank 5 reaches either the set upper limit pressure or temperature condition, the external temperature inlet diaphragm regulating valve W7 and the second external temperature inlet diaphragm shut-off valve W8 connected in series on the pipeline are automatically closed. When the temperature and pressure inside the quick-opening plunger vulcanizing tank 5 do not reach the upper limit value, the second external temperature inlet diaphragm shut-off valve W8 is always in the normally open state, and the opening is regulated by the signal feedback value of the external temperature inlet diaphragm regulating valve W7 and the external temperature and pressure transmitter W5. To ensure timely drainage of condensate in the quick-opening plunger vulcanizing tank 5, 2 minutes after the automatic activation of the first external temperature inlet pneumatic shut-off valve W3, the automatic control activates and opens the condensate recovery pneumatic shut-off valve H2, forming a condensate drainage circuit with the first condensate recovery gate valve H1 and the second condensate recovery gate valve H3. After 30 seconds of condensate drainage, the automatic shut-off switch to the capacitor level controller K4. The capacitor level controller K4 transmits signals to the PLC control system K3 based on the water level. The PLC control system K3 then issues commands to control the air supply from the pneumatic triplet K1 to automatically drain condensate via the on / off switch of the solenoid valve K2.Three minutes after the automatic activation of the first external temperature inlet pneumatic shut-off valve W3, the internal temperature circulation inlet pipeline N1 automatically starts. The medium then circulates through the upper tank cover 9, upper transition plate 8, mold assembly, and lower large plate 6, and then through another loop of the mold assembly, upper transition plate 8, and upper tank cover 9 back to the internal temperature circulation return pipeline N2, forming an internal temperature circulation system. After the set positive vulcanization time for the entire vulcanization cycle, the internal temperature circulation system and the external temperature automatic control circulation system are automatically shut off. The main drain recovery pipeline H4 is activated, and the external cooling inlet pipeline W9 is opened for spray cooling for 10 minutes. At the same time, the external cooling inlet pipeline W9 and the main drain recovery pipeline H4 are automatically closed, and the vent pipeline H5 is automatically switched on and opened. When the system detection pressure inside the quick-opening plunger vulcanizing tank 5 returns to zero, an automatic alarm is triggered to indicate the end of vulcanization. After switching from automatic to manual operation, the operator manually lowers the plunger 2 to its lowest point, then opens the locking ring 10, opens the upper can lid 9, moves it to the fixed storage area, and removes the molds 7 one by one to complete the vulcanization cycle, followed by cyclic filling. This solves the problem of large temperature and pressure fluctuations inside the can caused by manual operation, which directly affects the internal and external quality defects of the product, posing a great risk to quality and resulting in energy waste.

Claims

1. An automatic external temperature control device for a plunger-type quick-opening vulcanizing tank, comprising a quick-opening plunger vulcanizing tank, a plunger cylinder at the bottom of the quick-opening plunger vulcanizing tank, a plunger inside the plunger cylinder connected to a lower large plate inside the quick-opening plunger vulcanizing tank, the plunger cylinder being mounted on a support base, and the main pipeline of the mold being connected to the internal temperature circulation inlet pipeline and the internal temperature circulation return pipeline on the upper tank cover to form an internal temperature circulation system, characterized in that... The quick-opening plunger vulcanizing tank is equipped with an external temperature inlet pipeline. This pipeline includes a first external temperature inlet gate valve, a first external temperature inlet pneumatic shut-off valve, and a second external temperature inlet gate valve. A third external temperature inlet gate valve, an external temperature inlet pneumatic diaphragm regulating valve, and a second external temperature inlet pneumatic shut-off valve are also connected in parallel. Automatic control is achieved through signal feedback from an external temperature and pressure transmitter installed on the quick-opening plunger vulcanizing tank. An external temperature condensation recovery system is installed at the bottom of the quick-opening plunger vulcanizing tank. This system consists of a first condensation recovery gate valve, a condensation recovery pneumatic shut-off valve, and a second condensation recovery gate valve. A capacitive level controller is installed on the pipeline between the gate valve and the condensate recovery pneumatic shut-off valve. The capacitive level controller transmits signals to the PLC control system according to the water level. The PLC control system issues commands to control the gas source supplied by the pneumatic triplet to supply gas to the condensate recovery pneumatic shut-off valve for opening and closing via the solenoid valve. An external cooling inlet pipeline is installed on the quick-opening plunger vulcanizing tank between the external temperature inlet pipeline and the condensate recovery pipeline. The main discharge recovery pipeline and the vent pipeline are provided at the bottom of the quick-opening plunger vulcanizing tank. All control systems are set and recorded on the industrial control computer interface.

2. The automatic external temperature control device for the plunger-type quick-opening vulcanizing tank according to claim 1, characterized in that... The upper tank cover, upper transition plate, mold and lower large plate are sealed with a sealing gasket to prevent internal pressure from leaking into the quick-opening plunger vulcanizing tank.

3. The automatic external temperature control device for the plunger-type quick-opening vulcanizing tank according to claim 1, characterized in that... The internal temperature circulation inlet pipe and the internal temperature circulation return pipe on the upper can cover are connected to the main pipeline of the mold using quick-connect fittings.

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