CN206770688U - The adjustable controller of back pressure - Google Patents

Abstract

The utility model provides a kind of adjustable controller of back pressure, including, intake interface, control valve, outlet interface and feedback joint；Control valve includes：Valve casing, valve seat, control valve rod, spring base, control spring and diaphragm；Valve casing has inlet channel, compensated cavity, outlet passageway and feedback cavity；Valve seat is arranged between inlet channel and outlet passageway；Spring base is fixed on valve casing, controls one end of valve rod and the center stepped hole of valve seat to match；The other end of valve rod is controlled to be fixed after passing through the centre bore and diaphragm of spring base；Diaphragm isolates compensated cavity and feedback cavity；Feedback joint communicates with the feedback cavity.The pressure change adjust automatically with Quick-pressing cabin according to air demand is the advantage is that, is eliminated safe hidden trouble, ensures that diver quickly escape danger from underwater security.

Description

Controller with adjustable back pressure

technical field

The utility model relates to a controller, in particular to a controller with adjustable back pressure.

Background technique

The main function of the back pressure adjustable controller is to ensure the normal gas supply of the diver in the quick escape diving suit. With the continuous development of deep-sea operations, people pay more and more attention to the research on divers' underwater escape. When implementing underwater escape, divers need to wear quick escape diving suits, enter the rapid pressurization chamber to pressurize, and after the pressure in the rapid pressurization chamber is balanced with the external water pressure, open the upper cover of the pressurization chamber, and the diver leaves the rapid pressurization chamber , Relying on the buoyancy provided by the quick escape diving suit, quickly float to the surface. During the pressurization process in the rapid pressurization chamber, it is necessary to inflate the rapid escape diving suit through the inflation system to ensure the normal breathing of the diver. In the past, the air supply volume of the inflatable system could not be automatically adjusted with the pressure change of the rapid pressurization chamber, and there were safety hazards such as crushing injuries and drowning of divers due to too small air supply volume, or rupture of the air bag of the rapid escape diving suit due to excessive air supply volume. How to make the gas supply of the inflation system automatically adjust with the pressure change of the rapid pressurization chamber to eliminate potential safety hazards is an important research topic in this field.

Utility model content

The purpose of the utility model is to provide a controller with adjustable back pressure to ensure that divers escape safely and quickly from underwater.

The utility model provides a controller with adjustable back pressure, which includes an air inlet port, a control valve, an air outlet port and a feedback joint; the control valve includes: a valve shell, a valve seat, a control valve stem, a spring seat, a control spring and a membrane The valve housing has an inlet passage, a compensation chamber, an outlet passage and a feedback chamber; the valve seat is arranged between the inlet passage and the outlet passage; the spring seat is fixed on the valve housing, and controls one end of the valve stem and the central step of the valve seat The holes are matched; the other end of the control valve rod is fixed after passing through the central hole of the spring seat and the diaphragm; the diaphragm isolates the compensation chamber from the feedback chamber; the feedback joint communicates with the feedback chamber.

Furthermore, the utility model provides a controller with adjustable back pressure, which also has the following features: the control valve also includes: the air inlet port is connected to the casing by thread; the air outlet port is connected to the casing by thread.

Furthermore, the utility model provides a controller with adjustable back pressure, which also has the following features: the connection end surface of the air inlet interface and the housing is sealed by a sealing ring; the air outlet interface and the end surface of the housing are sealed by a sealing ring.

Further, the utility model provides a controller with adjustable back pressure, which also has the following features: the air intake channel, the compensation chamber and the air outlet channel are arranged on the valve housing, one end of the air intake channel is connected to the air inlet interface; one end of the air outlet channel is connected to The air outlet port and the feedback cavity are set on the side cover.

Further, the utility model provides a controller with adjustable back pressure, which also has the following features: it also includes a sleeve covered on the control spring, and the control valve stem passes through the sleeve.

Furthermore, the utility model provides a controller with adjustable back pressure, which also has the following features: one end of the valve stem matches the central stepped hole of the valve seat.

Description of drawings

Figure 1 is a structural diagram of a controller with adjustable back pressure.

Fig. 2 is an enlarged view of part I of Fig. 1 .

Figure 3 is a gas flow diagram of the controller with adjustable back pressure.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described further.

Figure 1 is a structural diagram of a controller with adjustable back pressure.

As shown in FIG. 1 , the air intake controller 1 includes: an air intake interface 101 , a control valve 102 , an air outlet interface 103 and a feedback joint 104 . The air inlet port 101 serves as the air inlet port of the entire back pressure adjustable controller.

The control valve 102 includes: a valve housing 111 , a valve seat 112 , a control valve stem 113 , a spring seat 114 , a control spring 115 , a sleeve 116 , an inner rigid body 117 , a diaphragm 118 , an outer rigid body 119 and a valve stem nut 120 .

The valve casing 111 is composed of a casing 121 and a side cover 122 connected by a screw assembly 123 . The air inlet port 101 is screwed to the housing 121 , and the end surface is sealed with a sealing ring 161 . The air outlet port 103 is connected to the housing 121 by threads, and the end surface is sealed by a sealing ring 162 .

The housing 121 has an air inlet channel 151 , a compensation cavity 152 and an air outlet channel 153 . One end of the air inlet channel 151 is connected to the air inlet port 101; one end of the air outlet channel 153 is connected to the air outlet port 103. The side cover 122 has a feedback cavity 154 thereon.

The diaphragm 118 is disposed between the housing 121 and the side cover 122 and also isolates the compensation chamber 152 from the feedback chamber 154 . The inner rigid body 117 and the outer rigid body 119 are respectively arranged on two sides of the diaphragm 118 .

Fig. 2 is an enlarged view of part I of Fig. 1 .

As shown in FIG. 2, the valve seat 120 has a central stepped hole 120-1 and six side holes 120-2. The valve seat 120 is disposed between the intake passage 151 and the discharge passage 153 of the housing 110 . The central stepped hole 120 - 1 communicates with the air inlet passage 151 , and the six side holes 120 - 2 communicate with the air outlet passage 153 . The circumference of the valve seat 120 and the housing 121 is sealed with a sealing ring 163 to ensure the sealing between each gas channel and the cavity.

The spring seat 114 is fixed with the housing 121 of the valve casing 111 by the screw assembly 124, and the circumference of the spring seat 114 is sealed with a sealing ring 164. One end of the control valve stem 113 is tapered, matching with the central stepped hole 120-1 of the valve seat 120; the other end passes through the central hole of the spring seat 114, and then passes through the sleeve 116, the inner rigid body 117, and the diaphragm 118 in sequence , After the central hole of the outer rigid body 119, it is threadedly connected with the stem nut 120. Two sealing rings are arranged on the circumference of the control valve rod 113 to ensure the tightness. The spring seat 114 is disposed between the spring seat 114 and the inner rigid body 117 .

The housing 121 is sealed with the valve seat 112 to divide the air intake channel 151 and the air outlet channel 153 . The sealing between the control valve stem 113 and the spring seat 114 isolates the compensation chamber 152 from the air inlet channel 151 and the air outlet channel 153 . The sealing between the control valve stem 113 and the diaphragm 118 isolates the compensation chamber 152 from the feedback chamber 154 .

Figure 3 is a gas flow diagram of the intake controller.

As shown by the arrow in Figure 3, the working principle of the air intake controller of the controller with adjustable back pressure: the inflation gas enters the air intake passage 151 of the housing 121 from the air intake interface 101, and passes between the valve seat 112 and the control valve stem 113. The gap between them enters from the central step hole 120-1 of the valve seat 112, then flows out from the side hole 120-2 into the air outlet channel 153, and then enters the air outlet interface 103.

Claims (6)

1. A controller with adjustable back pressure, characterized in that: comprising, an air inlet port, a control valve, an air outlet port and a feedback connector; Among them, the control valve includes: valve housing, valve seat, control valve stem, spring seat, control spring and diaphragm; The valve housing has an inlet passage, a compensation chamber, an outlet passage and a feedback chamber; The valve seat is set between the air inlet channel and the air outlet channel; the spring seat is fixed on the valve housing, and one end of the control valve stem matches the central step hole of the valve seat; the other end of the control valve stem passes through the center hole of the spring seat and the membrane The diaphragm is fixed behind; the diaphragm separates the compensation cavity from the feedback cavity. 2. The controller with adjustable back pressure according to claim 1, characterized in that: wherein, the air inlet interface is connected to the casing by thread; the air outlet interface is connected to the casing by thread. 3 . The controller with adjustable back pressure according to claim 1 , wherein the connecting end surface of the air inlet interface and the housing is sealed with a sealing ring; the air outlet interface and the end surface of the housing are sealed with a sealing ring. 4 . 4. The controller with adjustable back pressure according to claim 1, characterized in that: wherein, the air intake passage, the compensation chamber and the air outlet passage are arranged on the valve housing, and one end of the air inlet passage is connected to the air inlet interface; One end is connected to the air outlet port, and the feedback cavity is set on the side cover. 5. The controller with adjustable back pressure according to claim 1, further comprising a sleeve covered on the control spring, and the control valve stem passes through the sleeve. 6 . The controller with adjustable back pressure according to claim 1 , wherein one end of the control valve rod matches the central stepped hole of the valve seat. 7 .