PB type pressure controller with self-protection

By designing a double-layer bellows assembly and implementing rigorous inspection procedures, the problems of easy deformation and leakage of bellows in existing pressure controllers have been solved, achieving pressure control with longer service life and higher accuracy, while reducing operating costs and safety risks.

CN224536391UActive Publication Date: 2026-07-21SHANGHAI FENGSHEN REFRIGERATION CONTROLLER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI FENGSHEN REFRIGERATION CONTROLLER CO LTD
Filing Date
2025-09-08
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing pressure controllers are prone to bellows shrinkage and deformation during the overall system vacuuming process, which shortens their service life. Furthermore, there is no protection or alarm mechanism in case of leakage, posing risks of environmental pollution and economic loss.

Method used

The design employs a double-layer corrugated pipe assembly. The inner and outer corrugated pipe assemblies are formed by high-frequency brazing and laser sealing welding to create a closed spacer cavity. When the inner corrugated pipe ruptures, the outer corrugated pipe expands and triggers an alarm. Combined with strict inspection procedures, welding quality and sealing performance are ensured.

Benefits of technology

It extends the service life of the pressure controller, improves the accuracy and stability of pressure control, reduces media loss, and lowers operating costs and safety hazards.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a PB type pressure controller with self-protection, relates to pressure controller technical field, including gas tank shell assembly, the gas tank shell assembly lower extreme is provided with internal bellows assembly, external bellows assembly and sealed steel ball, the gas tank shell assembly is connected by high -frequency brazing and is formed with the gas tank shell board by hexagon thread joint. The utility model discloses the design structure is reasonable, it can be when the system pressure change, the closed interval cavity produces corresponding resistance to resist the internal bellows contraction, to slow down the contraction speed, protects the bellows wave form integrity, has improved the accuracy and stability of pressure control, adapts complex pressure environment, can when the internal bellows rupture, the external bellows expands under the system medium pressure and triggers the alarm, through the timely discovery of the fault and takes the measures, reduces the potential safety hazard, can ensure that user system host computer long -term is in safe working condition under the operation, reduces the system failure risk caused by medium leakage or pressure anomaly.
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