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CN-224214776-U - Automatic pressure relief valve for low-temperature industrial gas

CN224214776UCN 224214776 UCN224214776 UCN 224214776UCN-224214776-U

Abstract

The utility model discloses an automatic pressure relief valve for low-temperature industrial gas, which belongs to the technical field of pressure relief valves and comprises a valve body and a valve cover fixed at the upper end of the valve body through bolts, wherein an air inlet is arranged at the lower end of the valve body, an air outlet is arranged at the right end of the valve body, a sealing ring is arranged at the connecting surface of the valve cover and the valve body, and an automatic pressure relief mechanism is arranged in the valve cover and comprises a valve core assembly, the valve core assembly consists of a sealing sleeve, a medium channel and a valve clack, the sealing sleeve is fixed on the inner wall of the valve body, and the valve clack is in sliding fit with the inner wall of the sealing sleeve. When the pressure of the medium exceeds a set value, the gas pushes the conical surface of the valve clack to separate from the conical sealing groove of the sealing sleeve, at the moment, the medium is discharged through a passage formed by the medium channel and the exhaust port, and the gap between the valve clack and the adjusting sleeve is changed by rotating the adjusting sleeve, so that the maximum opening height of the valve clack can be adjusted, the flow rate of the medium can be further limited, and the sudden drop of the pressure of the system is avoided.

Inventors

  • YANG HAIFENG

Assignees

  • 江苏鑫科沐机械有限公司

Dates

Publication Date
20260508
Application Date
20250623

Claims (5)

  1. 1. The automatic pressure relief valve for the low-temperature industrial gas is characterized by comprising a valve body (1), a valve cover (2) fixed at the upper end of the valve body (1) through bolts, an air inlet (11) is formed in the lower end of the valve body (1), an air outlet (12) is formed in the right end of the valve body, a sealing ring (3) is arranged on the connecting surface of the valve cover (2) and the valve body (1), an automatic pressure relief mechanism is arranged in the valve cover (2), the automatic pressure relief mechanism comprises a valve core assembly, the valve core assembly consists of a sealing sleeve (4), a medium channel (41) and a valve clack (42), the sealing sleeve (4) is fixed on the inner wall of the valve body (1), the valve clack (42) is in sliding fit with the inner wall of the sealing sleeve (4), a conical sealing groove matched with the conical surface of the valve clack (42) is formed in the lower end of the sealing sleeve (42), a flow adjusting mechanism is further arranged in the valve cover (2), the adjusting sleeve (61) is in threaded connection with the inner threaded ring (6), and the maximum opening height of the valve clack (42) is changed through rotating the adjusting sleeve (61).
  2. 2. The automatic pressure relief valve for low-temperature industrial gas according to claim 1, wherein the automatic pressure relief mechanism further comprises a threaded sleeve (5), a valve rod (51) and a rebound assembly.
  3. 3. The automatic pressure relief valve for low-temperature industrial gas according to claim 2, wherein the rebound assembly comprises a return spring (52) and a baffle ring (53), the return spring (52) is sleeved on the surface of the valve rod (51), two ends of the return spring (52) are respectively abutted against the end surfaces of the baffle ring (53) and the threaded sleeve (5), and a lock nut (54) is arranged on the outer wall of the threaded sleeve (5) and used for fixing the adjusting position.
  4. 4. The automatic pressure relief valve for low-temperature industrial gas according to claim 2, wherein the upper end of the valve cover (2) is provided with a threaded hole, the threaded sleeve (5) is in threaded connection with the threaded hole, the valve rod (51) is in sliding connection with the threaded sleeve (5), the lower end of the valve rod is of a conical structure, and the upper end of the valve clack (42) is provided with a matched conical groove.
  5. 5. The automatic pressure relief valve for low-temperature industrial gas according to claim 1, wherein the medium channel (41) and the exhaust port (12) are positioned on the same central axis, and the valve clack (42) completely covers the medium channel (41) when being closed.

Description

Automatic pressure relief valve for low-temperature industrial gas Technical Field The utility model belongs to the technical field of pressure relief valves, and particularly relates to an automatic pressure relief valve for low-temperature industrial gas. Background The traditional relief valve generally adopts a plane sealing structure, and in the prior art, if a low-temperature valve is used for realizing pressure relief through combination of a valve clack and a spring, but when the spring is matched with the valve clack to open and close for pressure relief, the valve clack is fixed in opening height, and secondary fluctuation is easily caused when the system pressure suddenly drops. In order to overcome the defects, the automatic pressure relief valve for the low-temperature industrial gas is provided. Disclosure of utility model The utility model aims to provide an automatic pressure relief valve for low-temperature industrial gas, which aims to solve the technical problems in the background technology. The automatic pressure relief valve for the low-temperature industrial gas comprises a valve body and a valve cover fixed at the upper end of the valve body through a bolt, wherein an air inlet is arranged at the lower end of the valve body, an air outlet is arranged at the right end of the valve body, a sealing ring is arranged on the connecting surface of the valve cover and the valve body, an automatic pressure relief mechanism is arranged in the valve cover and comprises a valve core component, the valve core component consists of a sealing sleeve, a medium channel and a valve clack, the sealing sleeve is fixed on the inner wall of the valve body, the valve clack is in sliding fit with the inner wall of the sealing sleeve, the lower end of the valve clack is provided with a conical surface, the inner wall of the sealing sleeve is provided with a conical sealing groove matched with the conical surface of the valve clack, a flow regulating mechanism comprising an internal thread ring and an adjusting sleeve is arranged in the valve cover, the adjusting sleeve is in the internal thread ring, and the maximum opening height of the valve clack is changed through rotating the adjusting sleeve. Preferably, the automatic pressure relief mechanism further comprises a threaded sleeve, a valve rod and a rebound assembly. Preferably, the rebound assembly comprises a reset spring and a baffle ring, the reset spring is sleeved on the surface of the valve rod, two ends of the reset spring are respectively abutted against the end surfaces of the baffle ring and the thread bush, and a lock nut is arranged on the outer wall of the thread bush and used for fixing the adjusting position. Preferably, the threaded hole is formed in the upper end of the valve cover, the threaded sleeve is in threaded connection with the threaded hole, the valve rod is in sliding connection with the threaded sleeve, the lower end of the valve rod is of a conical structure, and the upper end of the valve clack is provided with a matched conical groove. Preferably, the medium channel and the exhaust port are positioned on the same central axis, and the medium channel is completely covered when the valve clack is closed. The automatic pressure relief valve for the low-temperature industrial gas has the following advantages: 1. when the pressure of the medium exceeds a set value, the gas pushes the conical surface of the valve clack to separate from the conical sealing groove of the sealing sleeve, at the moment, the medium is discharged through a passage formed by the medium channel and the exhaust port, and the gap between the valve clack and the adjusting sleeve is changed by rotating the adjusting sleeve, so that the maximum opening height of the valve clack can be adjusted, the flow rate of the medium can be further limited, and the sudden drop of the pressure of the system is avoided. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. FIG. 1 is a schematic perspective view of the present utility model; FIG. 2 is a schematic illustration of the front cross-section of the present utility model; Figure 3 is a schematic perspective view of a sealing sleeve according to the utility model; figure 4 is a schematic illustration of the front cross-section of the sealing sleeve of the present utility model. The figure shows that the valve body 1, the air inlet 11, the air outlet 12, the valve cover 2, the sealing ring 3, the sealing sleeve 4, the medium channel 41, the valve clack 42, the thread sleeve 5, th