A pneumatic diaphragm valve system

Abstract

The present invention relates to the technical field of pneumatic diaphragm valves, and discloses a pneumatic diaphragm valve system, including an upper shell, a lower shell fixedly mounted on the bottom of the upper shell, a diaphragm pressing mechanism movably mounted inside the lower shell, the diaphragm pressing mechanism including an air inlet, the air inlet fixedly mounted on the right side of the bottom of the lower shell, a diaphragm fixedly mounted inside the lower shell, a pressing seat movably mounted inside the lower shell, a connecting seat fixedly mounted inside the pressing seat, and a pressing flange fixedly mounted outside the pressing seat. The pneumatic diaphragm valve system drives the pressing seat upward through the diaphragm, the pressing seat drives the connecting rod upward, and at the same time drives the connecting seat to move, the connecting seat presses a fixed spring, and at the same time the connecting seat drives the travel slide bar to slide, the travel slide bar drives the travel pointer to move, so that the travel pointer indicates the scale on the scale, thereby achieving the effect of displaying the stroke size.

Description

Technical Field

[0001] The invention relates to the technical field of pneumatic diaphragm valves, in particular to a pneumatic diaphragm valve system. Background Art

[0002] The pneumatic diaphragm valve is a special form of shut-off valve that appeared in the 1920s. Its opening and closing parts are a diaphragm made of soft material, which separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving components, so it is called a pneumatic diaphragm valve. The most prominent feature of the pneumatic diaphragm valve is that the diaphragm separates the inner cavity of the lower valve body from the inner cavity of the upper valve cover, so that the valve stem, valve disc and other parts above the diaphragm are not corroded by the medium, the packing seal structure is omitted, and there will be no leakage of the medium.

[0003] In the prior art, the pneumatic diaphragm valve used in the process contains water vapor and impurities in the gas source. During long-term use, the air chamber of the pneumatic diaphragm valve will rust. Secondly, due to the left and right of the gas, water droplets are easily condensed on the side of the diaphragm where no gas enters, causing water to accumulate in the air chamber. Therefore, it is necessary to invent a pneumatic diaphragm valve system to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a pneumatic diaphragm valve system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pneumatic diaphragm valve system, comprising an upper shell, a respirator is fixedly installed on the left side of the upper shell, a lower shell is fixedly installed on the bottom of the upper shell, an exhaust valve is fixedly installed on the bottom left side of the lower shell, a drain valve is fixedly installed on the top of the upper shell, a fixing frame is fixedly installed in the middle position of the bottom of the lower shell, and a diaphragm pressing mechanism is movably installed inside the lower shell.

[0006] The diaphragm pressing mechanism includes an air inlet, which is fixedly installed on the bottom right side of the lower shell, a diaphragm is fixedly installed inside the lower shell, a pressing seat is movably installed inside the lower shell, a connecting seat is fixedly installed inside the pressing seat, and a pressing flange is fixedly installed outside the pressing seat.

[0007] Preferably, the two sides of the diaphragm are clamped by the upper shell and the lower shell, and the upper shell and the lower shell are fixedly installed by bolts and nuts. The middle position of the diaphragm is fixedly pressed on the outer side of the pressing seat by the pressing flange. The diaphragm and the inner cavity of the upper shell form an upper air chamber, and the diaphragm and the inner cavity of the lower shell form a lower air chamber. The diaphragm is clamped by the upper shell and the lower shell to ensure the air tightness of the diaphragm.

[0008] Preferably, a driving mechanism is slidably installed on the top of the pressure seat, and the driving mechanism includes a fixed spring, the bottom of the fixed spring is fixedly installed on the top of the connecting seat, the end of the fixed spring away from the connecting seat is fixedly installed with a top seat, and the top seat is fixedly installed on the bottom of the drain valve, and a connecting rod is slidably installed inside the fixed spring, and the bottom of the connecting rod is fixedly installed on the top of the connecting seat, so that the pressure seat can drive the connecting rod to slide.

[0009] Preferably, a limit sleeve is fixedly installed in the middle position of the bottom of the lower shell body, a travel slide rod is slidably installed inside the limit sleeve, the top of the travel slide rod is fixedly installed with the bottom of the connecting seat, a travel pointer is fixedly installed on the outside of the travel slide rod away from the limit sleeve, and a scale is fixedly installed on the left inner wall of the fixed frame at a position corresponding to the travel pointer. The travel pointer is driven to move by the travel slide rod so that the travel pointer indicates the scale, which is convenient for displaying the travel distance.

[0010] Preferably, a valve stem control mechanism is provided at the middle position of the bottom of the fixed frame, and the valve stem control mechanism includes a sliding valve stem, and the sliding valve stem is slidably installed at the bottom of the travel slide rod, a valve core is movably installed at the bottom of the sliding valve stem, a sealing ring is fixedly installed on the outside of the valve core, and a fixing seat is fixedly installed on the outside of the sliding valve stem, and the opening and closing of the valve core is controlled by the valve stem control mechanism, thereby controlling the flow rate.

[0011] Preferably, a valve body mechanism is fixedly installed on the bottom of the fixing frame, and the valve body mechanism includes a valve body, and the valve body is fixedly installed on the bottom of the fixing frame, and a valve seat is fixedly installed inside the valve body, and the position of the valve seat corresponds to the valve core, a water inlet is opened on the left side of the valve body, a drain outlet is opened on the right side of the valve body, and an installation groove is opened on the top of the valve body, and the fixing seat is fixedly installed in the installation groove, and the flow rate in the valve body is controlled by the valve body mechanism.

[0012] Preferably, a connecting pipe is fixedly installed on the outside of the air inlet, a constant-pressure reducing valve is fixedly installed on the outside of the connecting pipe, an adjustable reducing valve is fixedly installed on the outside of the connecting pipe at the right side of the constant-pressure reducing valve, and an air source condensation mechanism is fixedly installed on the end of the connecting pipe away from the air inlet, the pressure value in the connecting pipe is limited to not exceed the dangerous value by the constant-pressure reducing valve, and the operating pressure of the diaphragm pressing mechanism is set by the adjustable reducing valve.

[0013] Preferably, the gas source condensation mechanism includes a condenser body, the condenser body is fixedly installed on the end of the connecting pipe away from the air inlet, a stop valve is fixedly installed on the bottom of the condenser body, an air inlet is fixedly installed on the right side of the condenser body, a top cover is fixedly installed on the top of the condenser body, a filter is fixedly installed on the bottom of the top cover, the filter is located inside the condenser body, a joint is fixedly installed on the top of the top cover, the joint is fixedly installed with the connecting pipe, and impurities and water vapor in the gas source gas are removed by the gas source condensation mechanism.

[0014] Compared with the prior art, the present invention provides a pneumatic diaphragm valve system, which has the following beneficial effects:

[0015] The pneumatic diaphragm valve system introduces gas into the condenser body through the air inlet, condenses through the condenser body to remove water vapor, removes impurities in the gas through a filter, and then discharges the gas into a connecting pipe through a joint on the top cover. The working air pressure is set by an adjustable pressure reducing valve, and the treated gas is introduced into the lower shell through the connecting pipe, thereby achieving the effect of removing water vapor and impurities in the gas source.

[0016] The pneumatic diaphragm valve system drives the pressure seat to move upward through the diaphragm, and the pressure seat drives the connecting rod to move upward, and at the same time, the pressure seat drives the connecting seat to move, and the connecting seat presses the fixed spring. At the same time, the connecting seat drives the travel slide bar to slide, and the travel slide bar drives the travel pointer to move, so that the travel pointer indicates the scale on the scale, thereby achieving the effect of displaying the stroke size.

[0017] The pneumatic diaphragm valve system drives the sliding valve stem to slide in the fixed seat through the travel slide rod, so that the sliding valve stem opens the valve core, so that the liquid flows through the valve seat through the water inlet and is discharged from the drain port. By adjusting the adjustable pressure reducing valve, the pressure of the intake air is controlled, thereby controlling the state of the valve core opening and further controlling the flow rate.

[0018] The pneumatic diaphragm valve system drives the pressure seat to move upward through the diaphragm, and the pressure seat drives the connecting rod to move upward, and at the same time, the pressure seat drives the connecting seat to move, and the connecting seat presses the fixed spring, so that the fixed spring pushes the top seat, and the top seat pushes the drain valve to open the drain valve, thereby discharging the water vapor inside the upper shell to prevent internal rust. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor:

[0020] Figure 1It is a schematic diagram of the front structure of the present invention;

[0021] Figure 2 It is a front structural schematic diagram of the upper housing and the connected mechanism of the present invention;

[0022] Figure 3 This is a schematic diagram of the front structure of the valve core and valve seat installation of the present invention;

[0023] Figure 4 It is a partial cross-sectional schematic diagram of the front structure of the present invention;

[0024] Figure 5 It is a schematic cross-sectional view of the front structure of the gas source condensation mechanism of the present invention.

[0025] In the figure: 1, upper shell; 11, respirator; 12, drain valve; 2, lower shell; 21, exhaust valve; 3, fixing frame; 4, diaphragm pressing mechanism; 41, air inlet; 42, diaphragm; 43, pressing seat; 44, pressing flange; 45, connecting seat; 5, driving mechanism; 51, fixing spring; 52, top seat; 53, connecting rod; 54, limit sleeve; 55, travel slide rod; 56, travel pointer; 57, engraved Meter; 6. Valve stem control mechanism; 61. Sliding valve stem; 62. Valve core; 63. Sealing ring; 64. Fixed seat; 7. Valve body mechanism; 71. Valve body; 72. Valve seat; 73. Water inlet; 74. Drain outlet; 8. Connecting pipe; 81. Constant pressure reducing valve; 82. Adjustable pressure reducing valve; 9. Air source condensation mechanism; 91. Condenser body; 92. Stop valve; 93. Air inlet; 94. Filter; 95. Top cover. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-5The present invention provides a technical solution: a pneumatic diaphragm valve system, comprising an upper shell 1, a respirator 11 is fixedly installed on the left side of the upper shell 1, a lower shell 2 is fixedly installed on the bottom of the upper shell 1, an exhaust valve 21 is fixedly installed on the left bottom of the lower shell 2, a drain valve 12 is fixedly installed on the top of the upper shell 1, a fixing frame 3 is fixedly installed at the middle position of the bottom of the lower shell 2, and a diaphragm pressing mechanism 4 is movably installed inside the lower shell 2.

[0029] The diaphragm pressing mechanism 4 includes an air inlet 41, which is fixedly installed on the right side of the bottom of the lower shell 2. A diaphragm 42 is fixedly installed inside the lower shell 2, a pressing seat 43 is movably installed inside the lower shell 2, a connecting seat 45 is fixedly installed inside the pressing seat 43, and a pressing flange 44 is fixedly installed outside the pressing seat 43. Both sides of the diaphragm 42 are clamped by the upper shell 1 and the lower shell 2, and the upper shell 1 and the lower shell 2 are fixedly installed by bolts and nuts. The middle position of the diaphragm 42 is fixedly pressed on the outside of the pressing seat 43 by the pressing flange 44. The diaphragm 42 and the inner cavity of the upper shell 1 form an upper air chamber, and the diaphragm 42 and the inner cavity of the lower shell 2 form a lower air chamber. The diaphragm 42 is clamped by the upper shell 1 and the lower shell 2 to ensure the air tightness of the diaphragm 42.

[0030] A driving mechanism 5 is slidably installed on the top of the pressing seat 43, and the driving mechanism 5 includes a fixing spring 51, the bottom of which is fixedly installed on the top of the connecting seat 45, and a top seat 52 is fixedly installed on the end of the fixing spring 51 away from the connecting seat 45, and the top seat 52 is fixedly installed on the bottom of the drain valve 12, and a connecting rod 53 is slidably installed inside the fixing spring 51, and the bottom of the connecting rod 53 is fixedly installed on the top of the connecting seat 45, so that the pressing seat 43 drives the connecting rod 53 to slide, and a limiting sleeve 54 is fixedly installed at the middle position of the bottom of the lower shell body 2, and a travel slide bar 55 is slidably installed inside the limiting sleeve 54, and the top of the travel slide bar 55 is fixedly installed on the bottom of the connecting seat 45, and a travel pointer 56 is fixedly installed on the outside of the side of the travel slide bar 55 away from the limiting sleeve 54, and a scale meter 57 is fixedly installed at the corresponding position of the travel pointer 56 on the left inner wall of the fixed frame 3, and the travel pointer 56 is driven to move by the travel slide bar 55, so that the travel pointer 56 indicates the scale meter 57, which is convenient for displaying the travel distance.

[0031] A valve stem control mechanism 6 is provided at the middle position of the bottom of the fixed frame 3. The valve stem control mechanism 6 includes a sliding valve stem 61. The sliding valve stem 61 is slidably installed at the bottom of the travel slide rod 55. A valve core 62 is movably installed at the bottom of the sliding valve stem 61. A sealing ring 63 is fixedly installed on the outside of the valve core 62. A fixing seat 64 is fixedly installed on the outside of the sliding valve stem 61. The opening and closing of the valve core 62 is controlled by the valve stem control mechanism 6, thereby controlling the flow rate.

[0032] A valve body mechanism 7 is fixedly installed at the bottom of the fixing frame 3, and the valve body mechanism 7 includes a valve body 71. The valve body 71 is fixedly installed at the bottom of the fixing frame 3. A valve seat 72 is fixedly installed inside the valve body 71. The position of the valve seat 72 corresponds to the valve core 62. A water inlet 73 is opened on the left side of the valve body 71, and a drain outlet 74 is opened on the right side of the valve body 71. An installation groove is opened on the top of the valve body 71, and the fixing seat 64 is fixedly installed in the installation groove. The flow rate in the valve body 71 is controlled by the valve body mechanism 7.

[0033] A connecting pipe 8 is fixedly installed on the outside of the air inlet 41, a constant-pressure reducing valve 81 is fixedly installed on the outside of the connecting pipe 8, an adjustable reducing valve 82 is fixedly installed on the outside of the connecting pipe 8 at the right side of the constant-pressure reducing valve 81, and an air source condensation mechanism 9 is fixedly installed on the end of the connecting pipe 8 away from the air inlet 41. The constant-pressure reducing valve 81 is used to limit the pressure value in the connecting pipe 8 to not exceed the dangerous value, and the adjustable reducing valve 82 is used to set the operating pressure of the diaphragm pressing mechanism 4.

[0034] The gas source condensation mechanism 9 includes a condenser body 91, which is fixedly installed at one end of the connecting pipe 8 away from the air inlet 41. A stop valve 92 is fixedly installed at the bottom of the condenser body 91, and an air inlet 93 is fixedly installed on the right side of the condenser body 91. A top cover 95 is fixedly installed on the top of the condenser body 91, and a filter screen 94 is fixedly installed on the bottom of the top cover 95. The filter screen 94 is located inside the condenser body 91. A joint is fixedly installed on the top of the top cover 95, and the joint is fixedly installed with the connecting pipe 8. Impurities and water vapor in the gas source gas are removed through the gas source condensation mechanism 9.

[0035] In actual operation, when the device is used, the gas is introduced into the condenser body 91 through the air inlet 93, condensed through the condenser body 91 to remove water vapor, and impurities in the gas are removed through the filter 94. Then, the gas is discharged into the connecting pipe 8 through the joint on the top cover 95, and the working gas pressure is set by the adjustable pressure reducing valve 82. The treated gas is introduced into the lower shell 2 through the connecting pipe 8, so that the diaphragm 42 is pressed, and the diaphragm 42 drives the pressing seat 43 to move upward, and the pressing seat 43 drives the connecting rod 53 to move upward, and at the same time, the pressing seat 43 drives the connecting seat 45 to move, and the connecting seat 45 presses the fixed spring 51, and at the same time, the connecting seat 45 drives the travel slide bar 55 The stroke slide bar 55 drives the stroke pointer 56 to move, so that the stroke pointer 56 indicates the scale on the scale meter 57, and then displays the stroke size. The stroke slide bar 55 drives the sliding valve stem 61 to slide in the fixed seat 64, so that the sliding valve stem 61 opens the valve core 62, so that the liquid flows through the valve seat 72 through the water inlet 73 and is discharged from the drain port 74. By adjusting the adjustable pressure reducing valve 82, the pressure of the intake air is controlled, so as to control the opening state of the valve core 62, and further control the flow rate. The top seat 52 is pushed by the fixed spring 51, so that the top seat 52 pushes the drain valve 12, so that the drain valve 12 is opened, thereby discharging the water vapor inside the upper shell 1.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used 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 these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

Claims

1. A pneumatic diaphragm valve system, comprising an upper housing (1), characterized in that: A respirator (11) is fixedly mounted on the left side of the upper shell (1), a lower shell (2) is fixedly mounted on the bottom of the upper shell (1), an exhaust valve (21) is fixedly mounted on the left bottom of the lower shell (2), a drain valve (12) is fixedly mounted on the top of the upper shell (1), a fixing frame (3) is fixedly mounted at the middle position of the bottom of the lower shell (2), and a diaphragm pressing mechanism (4) is movably mounted inside the lower shell (2); The diaphragm pressing mechanism (4) comprises an air inlet (41), the air inlet (41) is fixedly mounted on the right side of the bottom of the lower shell (2), a diaphragm (42) is fixedly mounted inside the lower shell (2), a pressing seat (43) is movably mounted inside the lower shell (2), a connecting seat (45) is fixedly mounted inside the pressing seat (43), and a pressing flange (44) is fixedly mounted outside the pressing seat (43); A driving mechanism (5) is slidably mounted on the top of the pressure seat (43), the driving mechanism (5) comprising a fixed spring (51), the bottom of the fixed spring (51) being fixedly mounted on the top of the connecting seat (45), a top seat (52) being fixedly mounted on one end of the fixed spring (51) away from the connecting seat (45), the top seat (52) being fixedly mounted on the bottom of the drain valve (12), a connecting rod (53) being slidably mounted inside the fixed spring (51), the bottom of the connecting rod (53) being fixedly mounted on the top of the connecting seat (45); A limit sleeve (54) is fixedly mounted at the middle position of the bottom of the lower shell (2); a travel slide rod (55) is slidably mounted inside the limit sleeve (54); the top of the travel slide rod (55) is fixedly mounted to the bottom of the connecting seat (45); a travel pointer (56) is fixedly mounted on the outside of the travel slide rod (55) away from the limit sleeve (54); and a scale (57) is fixedly mounted on the left inner wall of the fixed frame (3) at a position corresponding to the travel pointer (56); A valve stem control mechanism (6) is provided at a middle position at the bottom of the fixing frame (3), and the valve stem control mechanism (6) comprises a sliding valve stem (61), the sliding valve stem (61) is slidably mounted at the bottom of the travel slide rod (55), a valve core (62) is movably mounted at the bottom of the sliding valve stem (61), a sealing ring (63) is fixedly mounted on the outside of the valve core (62), and a fixing seat (64) is fixedly mounted on the outside of the sliding valve stem (61).

2. A pneumatic diaphragm valve system according to claim 1, characterized in that: The two sides of the diaphragm (42) are clamped by the upper shell (1) and the lower shell (2), and the upper shell (1) and the lower shell (2) are fixedly mounted by bolts and nuts. The middle position of the diaphragm (42) is fixedly pressed on the outer side of the pressing seat (43) by the pressing flange (44). The diaphragm (42) and the inner cavity of the upper shell (1) form an upper air chamber, and the diaphragm (42) and the inner cavity of the lower shell (2) form a lower air chamber.

3. A pneumatic diaphragm valve system according to claim 1, characterized in that: A valve stem control mechanism (6) is provided at a middle position at the bottom of the fixing frame (3), and the valve stem control mechanism (6) comprises a sliding valve stem (61), the sliding valve stem (61) is slidably mounted at the bottom of the travel slide rod (55), a valve core (62) is movably mounted at the bottom of the sliding valve stem (61), a sealing ring (63) is fixedly mounted on the outside of the valve core (62), and a fixing seat (64) is fixedly mounted on the outside of the sliding valve stem (61).

4. A pneumatic diaphragm valve system according to claim 1, characterized in that: A connecting pipe (8) is fixedly mounted on the outside of the air inlet (41), a constant-pressure reducing valve (81) is fixedly mounted on the outside of the connecting pipe (8), an adjustable reducing valve (82) is fixedly mounted on the outside of the connecting pipe (8) at the right side of the constant-pressure reducing valve (81), and an air source condensing mechanism (9) is fixedly mounted on one end of the connecting pipe (8) away from the air inlet (41).

5. A pneumatic diaphragm valve system according to claim 4, characterized in that: The air source condensation mechanism (9) comprises a condenser body (91), the condenser body (91) being fixedly mounted on one end of the connecting pipe (8) away from the air inlet (41), a stop valve (92) being fixedly mounted on the bottom of the condenser body (91), an air inlet (93) being fixedly mounted on the right side of the condenser body (91), a top cover (95) being fixedly mounted on the top of the condenser body (91), a filter screen (94) being fixedly mounted on the bottom of the top cover (95), the filter screen (94) being located inside the condenser body (91), and a joint being fixedly mounted on the top of the top cover (95), the joint being fixedly mounted on the connecting pipe (8).

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