High-corrosion-resistance light and small diaphragm valve

Abstract

The utility model relates to the technical field of diaphragm valves, and discloses a high-corrosion-resistance light and small diaphragm valve which comprises a valve seat and a valve shell, the valve shell is installed at the front end of the valve seat, and an air inlet and an air outlet are formed in the valve seat. The anticorrosive coating is arranged on the surface of the diaphragm body, so that the corrosion resistance of the diaphragm valve is remarkably improved, the diaphragm valve can effectively resist corrosion of strong-oxidizing aerospace media, the structural integrity of the valve is ensured, and the service life of equipment is prolonged; the valve seat and the valve shell are tightly attached, the sealing performance is further improved, the possibility that gas escapes is reduced, stable flowing of the gas is ensured, the fixing stability of the diaphragm body is enhanced by forming the fixing groove in the valve seat and clamping the fixing groove with the fixing block, the diaphragm body is prevented from moving in the operation process, and the service life of the diaphragm body is prolonged. Therefore, the reliability of the equipment and the operation stability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of diaphragm valve, concretely to a high corrosion resistance light small diaphragm valve. BACKGROUND

[0002] The aerospace field covers various complex systems such as rocket launching, satellite operation, space station construction. These systems have very high requirements for fluid control, including precise flow control, reliable sealing and stable operation in extreme environments. For example, in the rocket propulsion system, the flow and pressure control of the propellant directly affect the performance of the engine; in the life support system of the space station, the supply of oxygen, water and other substances needs to be precisely controlled.

[0003] Special environmental factors: The aerospace environment has the characteristics of high vacuum, wide temperature range (-200℃-200℃ or so), micro meteoroid impact risk, strong space radiation, etc. These conditions put strict requirements on the valve material and performance, and the valve needs to work reliably for a long time in such harsh environments.

[0004] The traditional metal diaphragm valve may react chemically with some corrosive aerospace media (such as strong oxidizing propellant), affecting the structural integrity of the valve. Although the elastomeric diaphragm has certain chemical stability, its corrosion resistance cannot fully meet the requirements in the face of complex and diverse aerospace media and long-term contact. Therefore, it does not meet the existing needs, and for this we propose a high corrosion resistance light small diaphragm valve. INVENTION CONTENTS

[0005] The utility model provides a high corrosion resistance light small diaphragm valve, has reinforced the corrosion resistance of diaphragm valve, has prolonged the service life of equipment beneficial effect, solved the problem that the traditional metal diaphragm valve may react chemically with some corrosive aerospace media (such as strong oxidizing propellant) in the above background art, affecting the structural integrity of the valve. Although the elastomeric diaphragm has certain chemical stability, its corrosion resistance cannot fully meet the requirements in the face of complex and diverse aerospace media and long-term contact.

[0006] The utility model provides the following technical scheme: a high corrosion resistance light small diaphragm valve, including valve seat and valve shell, the valve shell is installed in valve seat front end, be opened with gas inlet and gas outlet on the valve seat, be opened with internal passage in the valve seat, the internal passage, gas inlet with gas outlet intercommunication, install the valve core in the valve shell, the end cover for controlling the valve core is inserted in the valve shell inner surface, be provided with spring between the end cover and the valve core, the valve core end installation diaphragm body, diaphragm body is located in the internal passage, the diaphragm body surface is provided with anticorrosive coating.

[0007] As a kind of high corrosion resistance light small diaphragm valve optional scheme of the utility model, wherein: the first recess is opened in the one end of the valve core close to the end cap, the second recess is opened in the end cap, the spring one end is fixedly connected with the first recess inner wall, the spring other end is fixedly connected with the second recess inner wall.

[0008] As a kind of high corrosion resistance light small diaphragm valve optional scheme of the utility model, wherein: the installation block is installed on the valve shell, the installation groove is opened in the valve seat relative to the installation block, the installation block is engaged with the installation groove.

[0009] As a kind of high corrosion resistance light small diaphragm valve optional scheme of the utility model, wherein: sealing rubber strip is installed in the installation groove, the sealing rubber strip is set as high-temperature-resistant rubber strip.

[0010] As a kind of high corrosion resistance light small diaphragm valve optional scheme of the utility model, wherein: the air hole is opened in the valve seat, the air hole is communicated with the air inlet and the internal passage, the diaphragm body is communicated with the air hole.

[0011] As a kind of high corrosion resistance light small diaphragm valve optional scheme of the utility model, wherein: the reinforcing cavity is opened in the valve shell, the reinforcing layer is installed in the reinforcing cavity, and the reinforcing layer is set as high-temperature-resistant aluminum alloy layer.

[0012] As a kind of high corrosion resistance light small diaphragm valve optional scheme of the utility model, wherein: the valve shell and the valve seat are both provided with anticorrosion layer, and the anticorrosion layer is set as anodization layer.

[0013] The utility model has the following beneficial effects:

[0014] 1、the high corrosion resistance light small diaphragm valve, by setting anticorrosive coating on diaphragm body surface, the corrosion resistance of diaphragm valve is improved significantly, so that it can effectively resist the corrosion of strong oxidizing aerospace medium, ensure the structural integrity of valve, prolong the service life of equipment, by opening installation groove in valve seat and installing sealing rubber strip in installation groove, ensure the close fit between valve seat and valve shell, further improve the sealing property, reduce the possibility of gas escape, ensure the stable flow of gas, by opening fixing groove in valve seat and engaging with fixing block, the fixing stability of diaphragm body is enhanced, prevent its movement in operation process, so as to improve the reliability of equipment and the stability of operation.

[0015] 2、The high-corrosion-resistance light and small diaphragm valve, through setting the sealing rubber strip as the high-temperature-resistant rubber strip, improves the high-temperature adaptability of the valve, through installing the high-temperature-resistant aluminum alloy layer in the reinforcing cavity, further enhances the high-temperature-resistant performance of the valve, ensures the stable operation of the valve in the extremely high-temperature environment, the high-temperature-resistant aluminum alloy layer not only has high heat resistance, but also can provide additional structural support, enhances the overall performance of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the main body cut structure schematic view of the utility model.

[0017] Figure 2 It is the main body plane structure schematic view of the utility model.

[0018] Figure 3 It is the main body cut structure schematic view of the utility model.

[0019] Figure 4 It is the main body cut structure schematic view of the utility model. Figure 3 The enlarged structure schematic view of A in the utility model.

[0020] In the figure: 110, valve seat;111, valve shell;112, diaphragm body;113, air inlet;114, air outlet;115, internal passage;116, valve core;117, spring;118, anticorrosion coating;119, end cover;120, first recess;121, second recess;122, mounting block;123, mounting groove;124, sealing rubber strip;125, air hole;130, reinforcing cavity;131, reinforcing layer;132, anticorrosion layer. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0022] Embodiment one, this embodiment aims to promote the solution that the traditional metal diaphragm valve can be chemically reacted with some corrosive aerospace medium, such as strong oxidizing propellant, which affects the structural integrity of the valve, although the elastomer diaphragm has certain chemical stability, but facing the complex and diverse aerospace medium and long-term contact, its corrosion resistance cannot completely meet the requirements, please refer to Figures 1-4The utility model provides a kind of high corrosion resistance light diaphragm valve, including valve seat 110 and valve shell 111, valve shell 111 is installed in valve seat 110 front end, valve seat 110 is opened with gas inlet 113 and gas outlet 114, internal passage 115 is opened in valve seat 110, internal passage 115, gas inlet 113 and gas outlet 114 are communicated, valve core 116 is installed in valve shell 111, end cap for controlling valve core 116 is inserted in valve shell 111 inner surface, spring 117 is arranged between end cap 119 and valve core 116, valve core 116 end is installed with diaphragm body 112, diaphragm body 112 is located in internal passage 115, diaphragm body 112 surface is provided with anticorrosive coating 118.

[0023] First recess 120 is opened in the end of valve core 116 close to end cap 119, second recess 121 is opened in end cap 119, one end of spring 117 is fixedly connected with the inner wall of first recess 120, the other end of spring 117 is fixedly connected with the inner wall of second recess 121. Mounting block 122 is installed on valve shell 111, mounting groove 123 is opened in valve seat 110 relative to mounting block 122, and mounting block 122 is clamped with mounting groove 123. Sealing rubber strip 124 is installed in mounting groove 123, and sealing rubber strip 124 is provided as high-temperature-resistant rubber strip. Air hole 125 is opened in valve seat 110, air hole 125 is communicated with gas inlet 113 and internal passage 115, and diaphragm body 112 is communicated with air hole 125.

[0024] Diaphragm body 112 is located in internal passage 115, in closed state, prevents the flow of gas. By the control of electromagnetic valve, end cap 119 moves, and compresses spring 117. With the movement of end cap 119, valve core 116 is moved to the opposite direction under the action of spring 117. Diaphragm body 112 opens: the movement of valve core 116 makes diaphragm body 112 move away from internal passage 115, opens the passage, and gas can flow from gas inlet 113 to gas outlet 114 through internal passage 115 and air hole 125.

[0025] Control signal is cancelled, and end cap returns to initial position. The reset of end cap 119 makes spring 117 restore original state, and valve core 116 returns to initial position under the action of spring 117. Diaphragm body 112 is closed. The reset of valve core 116 makes diaphragm body 112 cover internal passage 115 again, prevents the flow of gas, and completes the closing process.

[0026] In the embodiment, the corrosion resistance of the diaphragm valve is improved by arranging the anticorrosive coating 118 on the surface of the diaphragm body 112, so that the valve can effectively resist the corrosion of strong oxidizing aerospace medium, ensure the structural integrity of the valve, and prolong the service life of the equipment. By arranging the installation groove 123 in the valve seat 110 and installing the sealing rubber strip 124 in the installation groove 123, the close fit between the valve seat 110 and the valve shell 111 is ensured, the sealing performance is further improved, the possibility of gas leakage is reduced, and the stable flow of gas is ensured. By arranging the fixing groove 128 in the valve seat 110 and clamping with the fixing block 127, the fixing stability of the diaphragm body 112 is enhanced, and movement of the diaphragm body 112 during operation is prevented, thereby improving the reliability of the equipment and the stability of the operation.

[0027] In the second embodiment, the structure of the valve may be subjected to greater stress under high temperature and high pressure environment. The second embodiment is an improvement based on the first embodiment. For details, please refer to Figures 1-4 . The valve shell 111 is provided with a reinforcing cavity 130, and the reinforcing cavity 130 is provided with a reinforcing layer 131. The reinforcing layer 131 is arranged as a high-temperature-resistant aluminum alloy layer. The valve shell 111 and the valve seat 110 are both provided with an anticorrosive layer 132, and the anticorrosive layer 132 is arranged as an anodized layer.

[0028] In the embodiment, the sealing rubber strip 124 is arranged as a high-temperature-resistant rubber strip, the high-temperature adaptability of the valve is improved, the high-temperature-resistant aluminum alloy layer is installed in the reinforcing cavity 130, and the high-temperature-resistant performance of the valve is further enhanced, so that the stable operation of the valve under extreme high-temperature environment is ensured. The high-temperature-resistant aluminum alloy layer not only has high heat resistance, but also provides additional structural support, thereby enhancing the overall performance of the valve.

[0029] It should be noted that, in this document, the terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0030] The above description is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection scope of the present application.

Claims

1. A high corrosion resistant light and compact diaphragm valve comprising a valve seat (110) and a valve housing (111), characterized in that: The valve shell (111) is installed at the front end of the valve seat (110), the valve seat (110) is provided with an air inlet (113) and an air outlet (114), an internal passage (115) is formed in the valve seat (110), the internal passage (115), the air inlet (113) and the air outlet (114) are communicated, a valve core (116) is installed in the valve shell (111), an end cover (119) for controlling the valve core (116) is inserted into the inner surface of the valve shell (111), a spring (117) is arranged between the end cover (119) and the valve core (116), a diaphragm body (112) is installed at the end of the valve core (116), the diaphragm body (112) is located in the internal passage (115), and a corrosion-resistant coating (118) is arranged on the surface of the diaphragm body (112).

2. A high corrosion resistant light weight diaphragm valve as claimed in claim 1, wherein: A first groove (120) is formed in one end of the valve core (116) close to the end cover (119), a second groove (121) is formed in the end cover, one end of the spring (117) is fixedly connected with the inner wall of the first groove (120), and the other end of the spring (117) is fixedly connected with the inner wall of the second groove (121).

3. A high corrosion resistant light weight diaphragm valve as claimed in claim 1, wherein: The valve shell (111) is provided with a mounting block (122), the valve seat (110) is provided with a mounting groove (123) opposite to the mounting block (122), and the mounting block (122) is clamped in the mounting groove (123).

4. A high corrosion resistant light weight diaphragm valve as claimed in claim 3, wherein: A sealing rubber strip (124) is installed in the mounting groove (123), and the sealing rubber strip (124) is a high-temperature-resistant rubber strip.

5. A high corrosion resistant light weight diaphragm valve as claimed in claim 1, wherein: An air vent (125) is formed in the valve seat (110), the air vent (125) is communicated with the air inlet (113) and the internal passage (115), and the diaphragm body (112) is communicated with the air vent (125).

6. A high corrosion resistant light weight diaphragm valve as claimed in claim 1, wherein: A reinforcing cavity (130) is formed in the valve shell (111), a reinforcing layer (131) is installed in the reinforcing cavity (130), and the reinforcing layer (131) is a high-temperature-resistant aluminum alloy layer.

7. A high corrosion resistant light weight diaphragm valve as claimed in claim 1, wherein: The valve shell (111) and the valve seat (110) are both provided with a corrosion-resistant layer (132), and the corrosion-resistant layer (132) is an anodized layer.

Images