CN214425200U - Modular pipeline gas self-closing valve - Google Patents
Modular pipeline gas self-closing valve Download PDFInfo
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- CN214425200U CN214425200U CN202023250592.2U CN202023250592U CN214425200U CN 214425200 U CN214425200 U CN 214425200U CN 202023250592 U CN202023250592 U CN 202023250592U CN 214425200 U CN214425200 U CN 214425200U
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Abstract
The utility model relates to a modularized pipeline gas self-closing valve, which comprises a valve body, an elastic diaphragm, a valve core assembly and a mandril with a sealing head at the front end, wherein the mandril is assembled on an air inlet pipeline of the valve body in a left-right sliding way, and a ball valve is arranged on an exhaust pipeline of the valve body; the valve core assembly comprises a valve core support and a valve core, a permanent magnet is fixed at the upper end of the valve core, an upper armature and a lower armature are correspondingly arranged above and below the permanent magnet, and an overpressure valve for overpressure self-closing is fixedly installed in the air inlet pipeline at the upstream of the ejector rod sealing head in a sealing manner; the valve core support main part is the cylinder of interior valve core pilot hole, has the side ear on the lateral surface of valve core support, it has the transmission turning arm to articulate on the side ear, the transmission turning arm has two transmission arms that are the splayed and arrange, the free end of first transmission arm forms slider rocker structure in stretching into the transmission jack of tip under the valve core, the free end of second transmission arm forms slider rocker structure in stretching into the transmission jack of ejector pin rear end, the valve core reciprocates and moves about through transmission turning arm drive ejector pin.
Description
Technical Field
The utility model relates to a pipeline gas self-closing valve.
Background
Chinese utility model patent CN207297915U discloses an improvement type pipeline gas self-closing valve, it is separated into two upper and lower sealed cavities by the rubber diaphragm from the self-closing valve integument that valve body and valve gap constitute, the hand button that resets links together with the rubber diaphragm through the armature plate of pull rod lower extreme, just be provided with the magnetic ring stand device that can reciprocate to the pull rod below the pull rod, there is the pole of cutting off in its admission line, the left end of pole of cutting off is the rubber head of cutting off, the left end of right-hand member and a ejector pad contacts, the middle part of ejector pad rotates and installs on the fixed pin, the right-hand member of ejector pad passes through the loose pin and connects on the stand and from top to bottom along with the stand, the ejector pad can rotate around the fixed pin, its left and right ends ability luffing motion, it still presses between valve body and the right-hand member of cutting off and is equipped with sealing spring. When the upright post moves upwards, the left end of the push block swings downwards and pushes the cutting rod to move left to open the valve, and the sealing spring is compressed at the moment; when the upright post moves downwards, the left end of the push block swings upwards, and the cutting rod moves rightwards under the action of the elastic force of the sealing spring to close the valve. The overpressure working principle is that when overpressure occurs, the rubber diaphragm can rise further, the armature disc and the magnetic ring are attracted to each other, so that the stand column can be driven to rise further, after the stand column rises to a certain position, the stand column cannot rise continuously due to the blocking of the positioning plate, at the moment, when the tensile force of the rubber diaphragm reaches a certain degree, the armature disc is separated from the magnetic ring, the stand column falls back to the position where the stand column is attracted to the positioning plate due to the attraction force of the magnetic ring and the positioning plate, at the moment, the left end of the push block moves upwards and does not push the breaking rod forwards any more, and the breaking rod moves backwards under the pushing of the sealing spring to close the valve. Therefore, after the overpressure occurs, the upright post rises and then falls, and the valve is closed under the action of the sealing spring after a long delay time, so that the use insecurity is brought; in addition, when the sealing spring is weakened due to long-term use or broken due to other reasons, the valve can not be closed tightly or even closed, and potential safety hazards are brought to the self-closing valve.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can cut off the modularization pipeline gas self-closing valve that the valve was closed to the air supply fast when taking place the superpressure.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the modularized pipeline gas self-closing valve comprises a valve body, an elastic diaphragm, a valve core assembly and a mandril with a sealing head at the front end, wherein the mandril is assembled on an air inlet pipeline of the valve body in a left-right sliding manner, and a ball valve is arranged on an exhaust pipeline of the valve body; the valve core assembly comprises a valve core support and a columnar valve core which is assembled in the valve core support in an up-and-down sliding manner, the upper end of the valve core extends out of the valve core support and is fixed with a permanent magnet, an upper armature and a lower armature are correspondingly arranged above and below the permanent magnet, and an overpressure valve for overpressure self-closing is fixedly installed in the air inlet pipeline at the upstream of the ejector rod sealing head in a sealing manner; the valve core support main part is the cylinder of interior valve core pilot hole, has the side ear on the lateral surface of valve core support, and it has the transmission turning arm to articulate on the side ear, and the transmission turning arm has two transmission arms that are the splayed and arrange, and the free end of first transmission arm forms slider rocker structure in stretching into the transmission jack of tip under the valve core, and the free end of second transmission arm forms slider rocker structure in stretching into the transmission jack of ejector pin rear end, and the valve core reciprocates and moves about through transmission turning arm drive ejector pin.
The technical scheme of further optimization is that the overpressure valve is fixed in the air inlet pipeline through tight press fitting.
The technical scheme is that the overpressure valve comprises a valve rod, an air outlet valve body and an air inlet valve body, wherein the air outlet valve body and the air inlet valve body are of a cylindrical structure and are inserted together in a left-right opposite mode, two ends of the valve rod are assembled on the air outlet valve body and the air inlet valve body in a left-right sliding mode correspondingly, a radial valve plate is arranged on the valve rod, a compression spring is arranged between the valve plate and the air outlet valve body in a pressing mode, and when overpressure occurs, the valve plate moves towards the end of the air outlet valve body to plug a valve port on the air outlet valve body.
The technical scheme of further optimization is that the side lug is provided with two lug bodies which are arranged in parallel front and back, the lug bodies and the valve core support are arranged integrally, and the transmission crank arm is positioned between the two lug bodies and is hinged with the two lug bodies through a hinge shaft.
The further optimized technical scheme is that the matching part of the second transmission arm and the transmission jack at the rear end of the ejector rod is a spherical end head of the free end of the second transmission arm.
The technical scheme of further optimization is that upper and lower limiting convex ribs for preventing the first transmission arm from being in contact friction with the transmission jack hole are arranged on the wall of the transmission jack hole at the lower end of the valve core, the upper and lower limiting convex ribs are in sliding fit with the first transmission arm, and the cross section of the matching part of the upper and lower limiting convex ribs and the first transmission crank arm is a convex arc surface.
The bottom end of the valve core support is arranged on the valve body, the valve core support is fixed through a positioning plate pressed at the top end of the valve core support, and the positioning plate is fixed on the valve body through a bolt; the positioning plate is made of iron and forms the lower armature; the positioning plate is provided with a valve core through hole for the valve core to extend out.
According to a further optimized technical scheme, a positioning pin column and a positioning hole structure which are mutually inserted to realize positioning fit are arranged between the top end face of the valve core support and the positioning plate.
The technical scheme is that the upper end of the valve core is provided with an upward working limiting table, and when the self-closing valve is in a normal working state, the limiting table moves upwards to be matched with the positioning plate in a blocking mode.
The utility model has the advantages that: because the overpressure valve with an overpressure self-closing function is additionally arranged in the air inlet pipeline, when overpressure occurs, the overpressure valve can be quickly closed to cut off an air source, then no continuous air pressure supply exists in the cavity, a pressure loss effect can be generated, the valve core falls down, and the ejector rod moves to the right to drive the sealing head to plug the valve port of the self-closing valve, so that double protection of cutting off the air source and self-closing of the valve is realized, and the safety performance is better; the valve core and the ejector rod are linked by the transmission connecting lever, so that the ejector rod can be directly driven to move left and right by the transmission connecting lever as long as the valve core moves up and down, the opening and closing of the self-closing valve are realized, and the valve is very safe and reliable; in addition, the transmission crank arm is hinged to the valve core support, so that the transmission crank arm and the valve core assembly form an independent installation module, and the ball valve, the overpressure valve, the ejector rod, the valve body and the like are independent installation modules, so that the general assembly production process of the self-closing valve is simple and convenient, and the production efficiency is high.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention in an initial state;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic perspective view of the valve core bracket, the transmission crank arm and the push rod linkage part in FIG. 1;
FIG. 4 is a schematic view of the structure of FIG. 1 in a normal operating condition (self-closing valve open condition);
FIG. 5 is a schematic view of the arrangement of FIG. 1 in an overpressure condition (self-closing valve closed condition);
FIG. 6 is an enlarged fragmentary view of a portion of the intake air duct of FIG. 1;
fig. 7 is an exploded view of the overpressure valve of fig. 1.
In the figure, 1 is a valve body, 2 is a valve core support, 21 is a valve core support main body, 22 is a side lug, 23 is a positioning pin column, 3 is a valve core, 31 is a limiting convex rib, 32 is a limiting table surface, 4 is a transmission crank arm, 41 is a first transmission arm, 42 is a second transmission arm, 5 is a push rod, 6 is a sealing head, 7 is a valve cover, 8 is an elastic diaphragm, 9 is a lifting button pull rod, 10 is a permanent magnet, 11 is an upper armature, 12 is a positioning plate (the positioning plate is used as a lower armature), 13 is a ball valve, 101 is an air outlet valve body, 102 is an air inlet valve body, 103 is a valve rod, 104 is a valve plate, and 105 is a compression spring.
Detailed Description
The utility model discloses an embodiment of modularization pipeline gas self-closing valve is shown in fig. 1 to 7, and this embodiment includes valve body 1, and the right side section of valve body is that admission line, left side section are exhaust duct, middle section have formed the valve pocket through valve gap 7 of seal installation on the valve pocket opening. A valve port of the air inlet pipeline is slidably assembled with a mandril 5 which can move left and right, the peripheral surface of the mandril is provided with a vent groove, the air outlet pipeline is provided with a ball valve 13, and a valve cover is provided with a reset lifting button which can move up and down; the valve cavity is divided into an upper sealed cavity and a lower sealed cavity by an elastic diaphragm 8, the reset lifting button is connected with the elastic diaphragm through the lower end of a lifting button pull rod 9, and an upper armature 12 is arranged on the lower end of the lifting button pull rod; the lower sealing cavity is internally provided with a valve core assembly, the valve core assembly comprises a valve core support 2 and a valve core 3 assembled on the valve core support in an up-and-down sliding manner, the valve core is in transmission connection with an ejector rod 5 through a transmission connecting lever 4, the front end of the ejector rod is provided with a sealing head 6, the sealing head 6 can seal a valve port along with the movement of the ejector rod, the rear end of the ejector rod is provided with a transmission jack which is communicated up and down, and an overpressure valve for overpressure self-closing is fixedly sealed at the upstream position of the ejector rod sealing head in the air inlet pipeline in a pressing manner.
The overpressure valve comprises a valve rod 103, a cylindrical air outlet valve body 101 with an axis extending left and right, and an air inlet valve body 102 tightly inserted at the air inlet end of the air outlet valve body, wherein the air inlet valve body is arranged on the right and the air outlet valve body is arranged on the left in the figure, a valve rod jack extending along the axis is arranged on the axis of the air inlet valve body, a valve rod supporting hole is arranged at the air outlet end of the air outlet valve body 101, the valve rod supporting hole and the valve rod jack on the air inlet valve body are coaxially arranged, two ends of the valve rod are correspondingly inserted in the valve rod jack and the valve rod supporting hole in a sliding manner, and the valve rod 103 can slide left and right; the middle section of the valve rod is provided with a radial valve plate 104, a compression spring 105 is pressed between the valve plate and the air outlet valve body, and a valve port of the overpressure valve is arranged on the air outlet valve body and is opposite to the valve plate 104. The overpressure valve is always kept in a normally open state under the action of the compression spring 105, and only when overpressure exists, namely the pressure of a gas inlet pipeline is greater than the elastic force of the compression spring, the valve plate is pushed to move left to block the valve port, so that the overpressure valve is closed.
The main body 21 of the valve core support is a cylinder body with a valve core assembly hole arranged inside, the bottom end of the main body is seated on the valve body 1, the upper end of the main body is fixed by a positioning plate 11 which is arranged at the top end of the valve core support through pressing, the positioning plate is fixed on the valve body 1 through a bolt, a valve core perforation which can be used for extending out of the valve core 3 is arranged on the positioning plate, and the positioning plate 11 is made of iron materials, so the main body can be simultaneously used as a lower armature. In order to facilitate assembly and achieve a better positioning effect, positioning pins and positioning holes are further respectively arranged between the top end surface of the valve core support 2 and the positioning plate 11, and the positioning pins 23 are correspondingly inserted to realize positioning fit, and are arranged on the top end surface of the valve core support in two diagonal directions in the embodiment.
The valve core 3 is a columnar body and is assembled in a valve core assembly hole of the valve core bracket in a vertically sliding manner, the upper end of the valve core extends out of the valve core bracket 2 and is fixed with a permanent magnet 10, and the right upper part and the right lower part of the permanent magnet correspond to the upper armature 12 and the lower armature 11. An upward limiting table surface 32 is arranged at the upper end part of the valve core, and when the self-closing valve is in a normal working state, the limiting table surface moves upwards to be matched with the positioning plate 11 in a blocking way, as shown in figure 4; the lower end part of the valve core is provided with a transmission jack which is communicated with the left and the right.
The lateral side of the valve core bracket 2 is fixedly provided with a lateral lug 22, the transmission crank arm 4 is provided with two transmission arms which are arranged in a splayed shape, namely a first transmission arm 41 and a second transmission arm 42, and the corner part of the transmission crank arm is hinged on the lateral lug; the free end of the first transmission arm 41 extending into the transmission jack at the lower end of the valve core and the valve core 3 form a slide block rocker structure, the free end of the second transmission arm 42 extending into the transmission jack at the rear end of the mandril and the mandril 5 form a slide block rocker structure, so that the valve core 3, the transmission crank arm 4 and the mandril 5 form a linkage mechanism, and the mandril 5 can be driven to move left and right through the transmission crank arm 4 when the valve core 3 moves up and down. In order to make the linkage mechanism more flexible in movement, the free end of the second transmission arm 42 can be set as a spherical end to be matched with the transmission jack at the rear end of the mandril for transmission; in addition, the hole wall of the transmission insertion hole at the lower end of the valve core can be provided with an upper limiting convex rib 31 and a lower limiting convex rib 41 which are in sliding fit with the first transmission arm, so as to prevent the first transmission arm from contacting with the left hole edge and the right hole edge of the transmission insertion hole to generate friction when the transmission crank arm rotates, and the cross section of the matching part of the upper limiting convex rib 31 and the lower limiting convex rib 31 and the first transmission crank arm is preferably a convex arc surface during implementation.
In order to make the transmission crank arm 4 flexibly rotate in a stress balance way, the side lug 22 is preferably provided with a structure with two lug bodies which are parallel front and back, so that the transmission crank arm can be arranged between the two lug bodies and is hinged with the two lug bodies through a hinge shaft. In order to simplify the structure, the lug body and the valve core support are integrated.
The working principle of the pipeline gas self-closing valve is as follows:
in the initial state, as shown in fig. 1, at this time, the reset lifting button is in the lowest state, the sealing head 6 tightly presses the valve port to seal the valve port, the gas cannot pass through the self-closing valve, and the self-closing valve is in the closed state.
Under the normal working state, as shown in fig. 4, when the pressure of the gas in the pipeline is within the normal pressure range, the reset lifting knob is lifted upwards by hand, the valve core 3 moves upwards under the action of the attraction force of the permanent magnet 10 and the upper armature 12, the valve core drives the first transmission arm 41 to swing clockwise, the second transmission arm 42 swings along with the valve core and simultaneously drives the ejector rod 5 to move rightwards, so that the sealing head 6 leaves the valve port, the self-closing valve is opened, the gas passes through the self-closing valve, and the normal gas supply is realized. At this time, the elastic diaphragm 8 expands upward to a certain extent under the action of the gas pressure, the limit table surface 32 of the valve core 3 is in blocking fit with the positioning plate 11, and an arrow in the figure indicates the gas flow direction.
When the pressure is over the normal pressure range, as shown in fig. 5, the lift force acting on the elastic diaphragm is increased when the gas pressure in the gas inlet pipeline exceeds the normal pressure range, the valve core can not move upwards continuously because of being blocked by the positioning plate, when the lifting force on the elastic diaphragm exceeds the suction force of the permanent magnet 10 and the upper armature 12, the two are separated, at the moment, the elastic diaphragm 8 further expands upwards, the reset lifting button is in the highest state, when the valve plate 104 of the overpressure valve is pushed to the left side by air pressure to block the valve port, the overpressure valve air passage is cut off, continuous air pressure supply is not obtained in the cavity, a pressure loss effect is generated, the valve core 3 moves downwards under the action of gravity and the attraction force of the permanent magnet and the lower armature and finally enables the valve core and the lower armature to be attracted, the first transmission arm 41 swings anticlockwise, the second transmission arm 42 swings along with the valve core and simultaneously drives the ejector rod 5 to move leftwards to enable the sealing head 6 to tightly press the air inlet valve port, and the self-closing valve is integrally in a closed state.
When the pressure of gas in the gas inlet pipeline is lower than normal pressure in the absence of pressure, when the lift force of the pressure of gas in the valve body, which acts on the elastic diaphragm 8, and the suction force of the permanent magnet 10 and the upper armature 12 cannot overcome the suction force of the permanent magnet and the lower armature 11, the valve core 3 falls down, and simultaneously, the ejector rod 5 is driven to move leftwards, so that the sealing head 6 is tightly pressed on a gas inlet valve port, and the whole self-closing valve is in a closed state.
When the flow exceeds the rated flow of the self-closing valve during overflowing, the air pressure in the valve cavity is instantaneously reduced, the suction force between the permanent magnet and the lower armature is larger than the tension force of the elastic diaphragm, the lifting button pull rod 9 is pulled downwards, and the transmission crank arm pulls the ejector rod and the sealing head towards the direction of the cavity, so that the self-closing of the self-closing valve is realized.
Claims (9)
1. The modularized pipeline gas self-closing valve comprises a valve body, an elastic diaphragm, a valve core assembly and a mandril with a sealing head at the front end, wherein the mandril is assembled on an air inlet pipeline of the valve body in a left-right sliding manner, and a ball valve is arranged on an exhaust pipeline of the valve body; the valve core component comprises a valve core support and a columnar valve core which is assembled in the valve core support in an up-down sliding mode, the upper end of the valve core extends out of the valve core support and is fixed with a permanent magnet, and an upper armature and a lower armature are correspondingly arranged above and below the permanent magnet, and the valve core component is characterized in that: an overpressure valve for overpressure self-closing is fixedly arranged in the air inlet pipeline at the upstream of the ejector rod sealing head in a sealing manner; the valve core support main part is the cylinder of interior valve core pilot hole, has the side ear on the lateral surface of valve core support, and it has the transmission turning arm to articulate on the side ear, and the transmission turning arm has two transmission arms that are the splayed and arrange, and the free end of first transmission arm forms slider rocker structure in stretching into the transmission jack of tip under the valve core, and the free end of second transmission arm forms slider rocker structure in stretching into the transmission jack of ejector pin rear end, and the valve core reciprocates and moves about through transmission turning arm drive ejector pin.
2. The modular pipeline gas self-closing valve as recited in claim 1, wherein: the overpressure valve is fixed in the air inlet pipeline through tight press fitting.
3. The modular pipeline gas self-closing valve as recited in claim 2, wherein: the overpressure valve comprises a valve rod, an air outlet valve body and an air inlet valve body, wherein the air outlet valve body and the air inlet valve body are of a cylindrical structure and are inserted together in a left-right opposite mode, two ends of the valve rod are assembled on the air outlet valve body and the air inlet valve body in a left-right sliding mode, a radial valve plate is arranged on the valve rod, a compression spring is arranged between the valve plate and the air outlet valve body in a pressing mode, and when overpressure occurs, the valve plate moves towards the end of the air outlet valve body to plug a valve port on the air outlet valve body.
4. The modular pipeline gas self-closing valve as recited in claim 1, wherein: the side ear is provided with two ear bodies which are arranged in parallel in the front and at the back, the ear bodies and the valve core support are arranged integrally, and the transmission connecting lever is positioned between the two ear bodies and is hinged with the two ear bodies through a hinge shaft.
5. The modular pipeline gas self-closing valve as recited in claim 1, wherein: and the matching part of the second transmission arm and the transmission jack at the rear end of the ejector rod is a spherical end head at the free end of the second transmission arm.
6. The modular pipeline gas self-closing valve as recited in claim 1, wherein: the wall of the transmission jack hole at the lower end part of the valve core is provided with upper and lower limiting convex ribs for preventing the first transmission arm from being in contact friction with the transmission jack hole, the upper and lower limiting convex ribs are in sliding fit with the first transmission arm, and the cross section of the matching part of the upper and lower limiting convex ribs and the first transmission crank arm is a convex cambered surface.
7. A modular pipeline gas self-closing valve according to any of the claims 1-6, characterized in that: the bottom end of the valve core support is arranged on the valve body, the valve core support is fixed through a positioning plate pressed at the top end of the valve core support, and the positioning plate is fixed on the valve body through a bolt; the positioning plate is made of iron and forms the lower armature; the positioning plate is provided with a valve core through hole for the valve core to extend out.
8. The modular pipeline gas self-closing valve as recited in claim 7, wherein: and a positioning pin column and a positioning hole structure which are mutually inserted to realize positioning fit are arranged between the top end surface of the valve core support and the positioning plate.
9. The modular pipeline gas self-closing valve as recited in claim 7, wherein: and an upward working limiting table surface is arranged at the upper end part of the valve core, and when the self-closing valve is in a normal working state, the limiting table surface moves upwards to be matched with the positioning plate in a blocking way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023250592.2U CN214425200U (en) | 2020-12-29 | 2020-12-29 | Modular pipeline gas self-closing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023250592.2U CN214425200U (en) | 2020-12-29 | 2020-12-29 | Modular pipeline gas self-closing valve |
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| Publication Number | Publication Date |
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| CN214425200U true CN214425200U (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023250592.2U Active CN214425200U (en) | 2020-12-29 | 2020-12-29 | Modular pipeline gas self-closing valve |
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| CN (1) | CN214425200U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944767A (en) * | 2021-10-31 | 2022-01-18 | 东风商用车有限公司 | Liquid outlet stop valve for gas system and gas supply system |
-
2020
- 2020-12-29 CN CN202023250592.2U patent/CN214425200U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113944767A (en) * | 2021-10-31 | 2022-01-18 | 东风商用车有限公司 | Liquid outlet stop valve for gas system and gas supply system |
| CN113944767B (en) * | 2021-10-31 | 2023-11-03 | 东风商用车有限公司 | Liquid outlet stop valve for gas system and gas supply system |
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