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constant pressure valve

A constant pressure valve and valve body technology, which is applied in the direction of lifting valve, balance valve, valve device, etc., can solve the problems of difficult to guarantee system reliability, complicated control gas path, inability to forward air intake and reverse exhaust, etc. To achieve the effects of stable and reliable operation, reduced complexity and high adaptability

Active Publication Date: 2018-10-12
NINGBO AIRTAC AUTOMATIC INDAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current constant pressure valves on the market cannot realize the operation of forward air intake and reverse exhaust according to the system pressure, which makes the control air circuit more complicated and the reliability of the system is difficult to guarantee

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 In the shown embodiment, a constant pressure valve includes a main pressure regulating seat 7, a valve body 4 and a valve seat 1, the three are arranged sequentially from top to bottom, and between the main pressure regulating seat and the valve body, the valve body It is tightly connected with the valve seat. A main valve core 6 is arranged between the main pressure regulating seat and the valve body. The main valve core includes a main valve body 6c and a main valve cover body 6a. An upper diaphragm 6b is arranged between the main valve body and the main valve cover body. The edge of the plate is fixed between the main pressure regulating seat and the valve body. The main pressure regulating seat is provided with a main pressure regulating mechanism, and the main pressure regulating mechanism includes a positioning seat fixed to the top of the main pressure regulating seat and a main pressure regulating shaft 17 threaded with the positioning seat. T...

Embodiment 2

[0033] The difference between embodiment 2 and embodiment 1 is that the upper end of the main pressure regulating shaft is also provided with a lock nut 8 acting on the top of the main pressure regulating seat, such as Figure 4 As shown, the lock nut 8 includes a main body section 811 , an anti-swing section 812 and a thread alignment maintaining mechanism 82 . The outer end of the main body section 811 is provided with a large diameter section 813 . A pendulum groove 814 is provided on the peripheral wall of the large-diameter section 813 . The anti-swing section 812 is provided with a swing head 815 . The anti-swing section 812 is rotatably installed in the large-diameter section 813 . The swing head 815 is plugged into the swing groove 814 .

[0034] The thread alignment maintaining mechanism 82 includes a plug 821 and a plug driving mechanism 822 . The plug 821 is disposed in the anti-sway section 812 . The plug driving mechanism 822 includes a first driving column 8...

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Abstract

The invention discloses a constant pressure valve, comprising a main pressure regulator seat consecutively connected from top to bottom, a valve body and a valve seat, wherein a main valve core is arranged between the valve body and the valve seat; a lower cavity is arranged inside the valve seat functioning on the bottom of main valve core; a front port and back port are arranged on the valve body; a middle cavity is set inside the valve body functioning on top of secondary valve core; an upper valve port is set in upper cavity which coordinates with the main valve core and is connected with the back port; a middle valve port is arranged in the middle cavity which coordinates with secondary valve core and is connected with the front port; the front port is connected respectively with upper cavity and lower cavity; and the back port is connected with middle cavity. The constant pressure valve is in purpose to provide a valve which can switchover air inflow, cut off gas circuit and exhaust in converse direction based on the inlet pressure.

Description

technical field [0001] The invention belongs to the field of valves, in particular to a constant pressure valve. Background technique [0002] As the industry enters automation and numerical control systems, compressed air has gradually become an important source of power. There are often a variety of valves in the control air circuit, and each valve performs its own function to meet the corresponding design requirements. Among them, for the constant pressure valve, when the gas pressure is higher than the opening pressure of the valve core, the valve core is opened, so that the gas path is connected, and when the gas pressure is lower than the valve core opening pressure, the valve core is closed, and the gas path is connected. cut off. For example, the Chinese patent announcement number: CN104455613A discloses a regulating constant pressure valve, which includes a valve body, the two ends of the valve body are provided with a water inlet and a water outlet connected throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K17/06F16K1/44F16K31/126F15B13/02
CPCF15B13/022F16K1/44F16K17/044F16K17/06F16K31/1262F16K31/1268
Inventor 王世忠方清华王立平俞建江窦彬彬
Owner NINGBO AIRTAC AUTOMATIC INDAL