CN212672498U - Pneumatic adjusting back pressure valve - Google Patents
Pneumatic adjusting back pressure valve Download PDFInfo
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- CN212672498U CN212672498U CN202021475296.XU CN202021475296U CN212672498U CN 212672498 U CN212672498 U CN 212672498U CN 202021475296 U CN202021475296 U CN 202021475296U CN 212672498 U CN212672498 U CN 212672498U
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Abstract
A pneumatic pressure adjusting backpressure valve comprises at least one group of pneumatic pressure adjusting modules; comprises a valve seat, a valve cover and an air pressure adjusting module; the valve cover is connected with the valve seat in a sealing way; the valve cover is provided with an air inlet interface, a pressure applying space is arranged inside the valve cover, and the air inlet interface is used for being externally connected with an air bottle so as to apply pressure to the inside of the valve seat through external air; the valve seat is provided with at least one group of corresponding air inlet, air outlet and throttling chamber, the throttling chamber comprises an upper pressure applying hole and a lower screw hole, and the pressure applying hole and the screw hole are of cylindrical stepped hole structures arranged coaxially; the air inlet is communicated with the pressure applying hole; the air outlet is communicated with the bottom of the screw hole; the air pressure adjusting module is arranged in a cavity formed by the throttling cavity and the pressing space, and the external air is pressed to act on the air pressure adjusting module so as to control the pressure from the air inlet to the air outlet.
Description
Technical Field
The utility model relates to an experimental apparatus field especially relates to a backpressure valve is adjusted to vapour-pressure type.
Background
The existing back pressure valves are all used for controlling the opening degree of a valve core through adjusting an external hand wheel, the back pressure valves are suitable for single-channel adjustment, the adjustment of the same pressure of a plurality of channels is involved, a plurality of independent back pressure valves need to be configured, a back pressure valve handle is independently adjusted, the relative occupied space is large, the operation is troublesome, the pressure adjustment of the channels is inconsistent, and the output is unstable.
Disclosure of Invention
An object of the utility model is to solve the above-mentioned problem among the prior art, provide a vapour-pressure type and adjust back pressure valve, it is convenient to adjust, and the pressure output of multichannel is unanimous.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a pneumatic pressure adjusting back pressure valve comprises a valve seat, a valve cover and a pneumatic pressure adjusting module;
the valve cover is connected with the valve seat in a sealing way; the valve cover is provided with an air inlet interface, a pressure applying space is arranged inside the valve cover, and the air inlet interface is used for being externally connected with an air bottle so as to apply pressure to the inside of the valve seat through external air;
the valve seat is provided with at least one group of corresponding air inlet, air outlet and throttling chamber, the throttling chamber comprises an upper pressure applying hole and a lower screw hole, and the pressure applying hole and the screw hole are of cylindrical stepped hole structures arranged coaxially; the air inlet is communicated with the pressure applying hole; the air outlet is communicated with the bottom of the screw hole;
the air pressure adjusting module is arranged in a cavity formed by the throttling cavity and the pressing space, and the external air is pressed to act on the air pressure adjusting module so as to control the pressure from the air inlet to the air outlet.
The air pressure adjusting module comprises a first compression bolt and an adjusting assembly;
the first compression bolt comprises a bolt body and a first sealing ring arranged at the bottom of the bolt body, a through hole is formed in the center of the bolt body, external threads are formed on the outer portion of the bolt body, the bolt body is fixedly connected with the screwing hole in a screwing mode, the first sealing ring is abutted against the bottom surface of the screwing hole, and a middle hole of the first sealing ring is communicated with the air outlet;
the adjusting assembly comprises a fixed seat, a valve core, a return spring, a flexible diaphragm and a second pressing bolt; the second compression bolt is arranged at the bottom of the fixed seat and is fixedly connected with the inner wall of the accommodating cavity in a threaded manner; the flexible diaphragm is positioned between the second compression bolt and the fixed seat, and the flexible diaphragm is covered on the top of the throttling chamber; the reset spring is arranged in the accommodating cavity, the upper part of the valve core is positioned in the second compression bolt, the lower part of the valve core is positioned in the first compression bolt, one end of the reset spring abuts against the fixed seat, and the other end of the reset spring abuts against the valve core; wherein, the valve core moves up and down to control the flow of the gas entering the through hole of the bolt body.
The valve core sequentially comprises an ejector rod, a pressing part, a cylinder and an adjusting part from top to bottom; the reset spring is sleeved on the periphery of the ejector rod, and the bottom end of the reset spring abuts against the top surface of the pressing part; a boss extends inwards from the central through hole of the second compression bolt, and the pressing part of the valve core is erected on the boss; the adjusting part is of a cone structure and is matched with the middle hole of the first sealing ring to adjust the gas flow.
The utility model discloses still include filter element, filter element locates the air inlet of valve body.
The utility model discloses still include the second sealing washer, the junction of disk seat and valve gap is located to the second sealing washer.
The utility model discloses still include the third sealing washer, the junction of valve gap and flexible diaphragm is located to the third sealing washer.
The flexible membrane is made of metal.
The valve cover and the valve seat are locked through bolts.
Compared with the prior art, the utility model discloses technical scheme obtains beneficial effect is:
1. the utility model realizes the pressure regulation of multiple channels through the air pressure, and the operation is convenient;
2. the utility model can sensitively and accurately control the pressure value of the multiple channels to be consistent, and ensure the stability of the output pressure;
3. the utility model has the advantages of simple components, compact design, simple structure and space saving;
4. the utility model adopts metal-metal membrane sealing to ensure the minimum sealing rate;
5. the metal flexible membrane is sensitive to pressure change and has good corrosion resistance;
6. the first compression bolt can compress the valve seat to improve the sealing performance of the valve core and the main valve seat.
Drawings
FIG. 1 is an exploded view schematically showing the structure of example 1;
FIG. 2 is a schematic cross-sectional view showing the structure of example 1;
FIG. 3 is a schematic view showing the overall construction of an adjusting assembly of embodiment 1;
FIG. 4 is a sectional view of the valve seat of embodiment 1;
FIG. 5 is a schematic cross-sectional view showing the structure of example 2;
fig. 6 is a second schematic cross-sectional view of the embodiment 2.
Reference numerals: the valve cover 1, the third sealing ring 2, the fixing seat 3, the return spring 4, the valve core 5, the flexible diaphragm 6, the second hold-down bolt 7, the first hold-down bolt 8, the valve seat 9, the second sealing ring 10, the air inlet port 11, the pressure applying space 12, the bolt body 81, the first sealing ring 82, the ejector rod 51, the pressing part 52, the cylinder 53, the adjusting part 54, the air inlet 91, the air outlet 92, the filter element 93, the throttling chamber 94, the pressure applying hole 941 and the screwing hole 942.
Detailed Description
In order to make the technical problem, technical solution and beneficial effects to be solved by the present invention clearer and more obvious, the following description is made in detail with reference to the accompanying drawings and embodiments.
Example 1
As shown in fig. 1 to 4, the single-channel pneumatic adjustment back pressure valve of the present embodiment includes a valve seat 9, a valve cover 1, and a pneumatic adjustment module;
the valve cover 1 is fixed with the valve seat 9 in a threaded manner; the valve cover 1 is provided with an air inlet interface 11, a pressure applying space 12 is arranged inside the valve cover, and the air inlet interface 11 is used for being externally connected with an air bottle so as to apply pressure to the inside of the valve seat 9 through external air;
the valve seat 9 is provided with a group of corresponding air inlets 91, air outlets 92 and throttling chambers 94; a filter element 93 is arranged at the air inlet 91;
the throttling chamber 94 comprises an upper pressure applying hole 941 and a lower screwing hole 942, and the pressure applying hole 941 and the screwing hole 942 are coaxially arranged in a cylindrical stepped hole structure; the air inlet 91 is communicated with a pressure applying hole 941; the air outlet 92 is communicated with the bottom of the screw hole 942;
the air pressure adjusting module is disposed in a chamber formed by the throttling chamber 94 and the pressure applying space 12, and external air is applied to the air pressure adjusting module to control the pressure from the air inlet 91 to the air outlet 92.
Specifically, the air pressure adjusting module comprises a first compression bolt 8 and an adjusting assembly;
the first hold-down bolt 8 comprises a bolt body 81 and a first sealing ring 82 arranged at the bottom of the bolt body 81, a through hole is arranged at the center of the bolt body 81, external threads are arranged on the outside of the bolt body 81, the bolt body 81 is fixedly connected with a screwing hole 942 in a screwing manner, the first sealing ring 82 is abutted against the bottom surface of the screwing hole 942, and a middle hole of the first sealing ring 82 is communicated with the air outlet 92;
the adjusting assembly is assembled into a whole, erected at the top of the throttling chamber 94 and comprises a fixed seat 3, a valve core 5, a return spring 4, a flexible diaphragm 6 and a second pressing bolt 7;
the fixed seat 3 is provided with an accommodating cavity with a downward opening, the center of the flexible diaphragm 6 is provided with a through hole, the second compression bolt 7 penetrates through the through hole to be in threaded connection with the inner wall of the lower part of the accommodating cavity, so that the flexible diaphragm 6 is positioned between the second compression bolt 7 and the fixed seat 3, the flexible diaphragm 6 is covered on the top of the throttling cavity 94, the flexible diaphragm 6 is made of metal, and the flexible diaphragm 6 is used for balancing the upper pressure and the lower pressure of the flexible diaphragm 6 so as to achieve the purpose of controlling the outlet pressure of the backpressure valve;
the valve core 5 comprises a mandril 51, a pressing part 52, a cylinder 53 and an adjusting part 54 from top to bottom in sequence; the upper part of the valve core 5 is positioned in the second hold-down bolt 7, the lower part of the valve core 5 is positioned in the first hold-down bolt 8, specifically, the reset spring 4 is arranged in the accommodating cavity and sleeved on the periphery of the ejector rod 51, the bottom end of the reset spring 4 abuts against the top surface of the pressing part 52, and the top end of the reset spring 4 abuts against the fixed seat 3; a boss extends inwards from the central through hole of the second compression bolt 7, and the pressing part 52 of the valve core 5 is erected on the boss; the adjusting part 54 is of a cone structure, the adjusting part 54 is matched with a middle hole of the first sealing ring 82, and the flow of gas entering the through hole of the bolt body 81 is controlled by the up-and-down movement of the valve core 5.
This embodiment still includes third sealing washer 2, third sealing washer 2 is located valve gap 1 and flexible diaphragm 6 junction for sealed flexible diaphragm 6 and disk seat 9 prevent that the gas of interface 11 that admits air from passing through flexible diaphragm 6 seepage to the feed gas in.
Example 2
As shown in fig. 5 to 6, the present embodiment is a dual-channel pneumatic pressure regulating back pressure valve, and the structure thereof is similar to that of embodiment 1; specifically, the valve seat 9 and the valve cover 1 are locked and fixed by bolts, and a second sealing ring 10 is arranged at the joint of the valve seat 9 and the valve cover 1 and used for sealing the valve cover 1 and the valve seat 9 and preventing gas at the gas inlet port 11 from leaking out of the valve seat 9;
the valve seat 9 is provided with two groups of corresponding air inlets 91, air outlets 92 and throttling chambers 94, and an air pressure adjusting module is arranged in each group of throttling chambers 94; the air inlet port 11 is located in the center of the valve seat 9, two pressure applying spaces 12 are arranged inside the valve seat 9 and respectively correspond to the two groups of throttling chambers 94, and the pressure applying spaces 12 are communicated with the air inlet port 11.
Example 3
For a multi-channel pneumatic pressure adjusting back pressure valve, in addition to the embodiment 2 in which a plurality of channels are integrated in one valve seat 9, a plurality of single-channel pneumatic pressure adjusting back pressure valves in the embodiment 1 may be connected in series, that is, the air inlet ports 11 on the valve covers 1 are connected to the air cylinder through multi-way ports such as a three-way port and a four-way port, so that the pressures of the plurality of channels can be controlled simultaneously.
The working principle of the utility model is as follows:
the external gas cylinder of interface 11 that admits air on the valve gap 1 adjusts the gas pressure of interface 11 that admits air, makes case 5 reciprocate, specifically: when the pressure is increased, the air pressure in the valve cover 1 acts on the flexible diaphragm 6, so that the valve core 5 moves downwards integrally, that is, the adjusting part 54 of the valve core 5 moves towards the direction close to the first sealing ring 82 of the first pressing bolt 8, so that the gap between the cone of the adjusting part 54 and the middle hole of the first sealing ring 82 is reduced, and after entering from the air inlet 91 of the valve seat 9, the raw material gas enters into the through hole gap formed by the bolt body 81 and the cylinder 53 of the valve core 5 through the pressing hole 941, then enters into the gap of the first sealing ring 82 through the through hole gap, and finally flows to the air outlet 92 from the gap; the larger the gas pressure of the gas inlet port 11 is, the larger the downward movement distance of the valve element 5 is, and the smaller the gap is, the smaller the gas flow rate from the gas inlet 91 to the gas outlet 92 is; when the gas pressure of the gas inlet port 11 is reduced, the valve core 5 moves upwards under the action of the return spring 4, so that the gap is enlarged, and the gas flow from the gas inlet 91 to the gas outlet 92 is enlarged;
to the vapour-pressure type regulation back pressure valve of multichannel, the regulation mode of pressure regulation and single channel is the same, consequently, the utility model discloses need not independently to adjust every back pressure valve, can realize the pressure regulation of multichannel through atmospheric pressure, convenient operation, pressure output stability is good.
Claims (8)
1. The utility model provides a vapour-pressure type adjusts back pressure valve which characterized in that: comprises a valve seat, a valve cover and an air pressure adjusting module;
the valve cover is connected with the valve seat in a sealing way; the valve cover is provided with an air inlet interface, a pressure applying space is arranged inside the valve cover, and the air inlet interface is used for being externally connected with an air bottle so as to apply pressure to the inside of the valve seat through external air;
the valve seat is provided with at least one group of corresponding air inlet, air outlet and throttling chamber, the throttling chamber comprises an upper pressure applying hole and a lower screw hole, and the pressure applying hole and the screw hole are of cylindrical stepped hole structures arranged coaxially; the air inlet is communicated with the pressure applying hole; the air outlet is communicated with the bottom of the screw hole;
the air pressure adjusting module is arranged in a cavity formed by the throttling cavity and the pressing space, and the external air is pressed to act on the air pressure adjusting module so as to control the pressure from the air inlet to the air outlet.
2. A vapour pressure regulating back pressure valve as claimed in claim 1, wherein: the air pressure adjusting module comprises a first compression bolt and an adjusting assembly;
the first compression bolt comprises a bolt body and a first sealing ring arranged at the bottom of the bolt body, a through hole is formed in the center of the bolt body, external threads are formed on the outer portion of the bolt body, the bolt body is fixedly connected with the screwing hole in a screwing mode, the first sealing ring is abutted against the bottom surface of the screwing hole, and a middle hole of the first sealing ring is communicated with the air outlet;
the adjusting assembly comprises a fixed seat, a valve core, a return spring, a flexible diaphragm and a second pressing bolt; the second compression bolt is arranged at the bottom of the fixed seat and is fixedly connected with the inner wall of the accommodating cavity in a threaded manner; the flexible diaphragm is positioned between the second compression bolt and the fixed seat, and the flexible diaphragm is covered on the top of the throttling chamber; the reset spring is arranged in the accommodating cavity, the upper part of the valve core is positioned in the second compression bolt, the lower part of the valve core is positioned in the first compression bolt, one end of the reset spring abuts against the fixed seat, and the other end of the reset spring abuts against the valve core; wherein, the valve core moves up and down to control the flow of the gas entering the through hole of the bolt body.
3. A vapour pressure regulating back pressure valve as claimed in claim 2, wherein: the valve core sequentially comprises an ejector rod, a pressing part, a cylinder and an adjusting part from top to bottom; the reset spring is sleeved on the periphery of the ejector rod, and the bottom end of the reset spring abuts against the top surface of the pressing part; a boss extends inwards from the central through hole of the second compression bolt, and the pressing part of the valve core is erected on the boss; the adjusting part is of a cone structure and is matched with the middle hole of the first sealing ring to adjust the gas flow.
4. A vapour pressure regulating back pressure valve as claimed in claim 1, wherein: still include the filter element, the air inlet of valve body is located to the filter element.
5. A vapour pressure regulating back pressure valve as claimed in claim 1, wherein: the valve seat further comprises a second sealing ring, and the second sealing ring is arranged at the joint of the valve seat and the valve cover.
6. A vapour pressure regulating back pressure valve as claimed in claim 2, wherein: still include the third sealing washer, the third sealing washer is located the junction of valve gap and flexible diaphragm.
7. A vapour pressure regulating back pressure valve as claimed in claim 2, wherein: the flexible membrane is made of metal.
8. A vapour pressure regulating back pressure valve as claimed in claim 1, wherein: the valve cover and the valve seat are locked through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021475296.XU CN212672498U (en) | 2020-07-23 | 2020-07-23 | Pneumatic adjusting back pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021475296.XU CN212672498U (en) | 2020-07-23 | 2020-07-23 | Pneumatic adjusting back pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212672498U true CN212672498U (en) | 2021-03-09 |
Family
ID=74817485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021475296.XU Active CN212672498U (en) | 2020-07-23 | 2020-07-23 | Pneumatic adjusting back pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212672498U (en) |
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2020
- 2020-07-23 CN CN202021475296.XU patent/CN212672498U/en active Active
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