CN216479217U - Double-piston pilot type angle type stop valve with spring reset structure - Google Patents
Double-piston pilot type angle type stop valve with spring reset structure Download PDFInfo
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- CN216479217U CN216479217U CN202123005490.9U CN202123005490U CN216479217U CN 216479217 U CN216479217 U CN 216479217U CN 202123005490 U CN202123005490 U CN 202123005490U CN 216479217 U CN216479217 U CN 216479217U
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Abstract
The utility model relates to a two piston guide's formula area spring reset structure's angle stop valve, include: the valve comprises a valve body, a valve seat, a valve clack, a double-piston spring reset actuating mechanism, a valve cover and a bracket; the double-piston spring return actuating mechanism comprises: the upper piston cylinder sleeve, the piston, the nut, the lower piston cylinder sleeve, the piston rod, the spring, the lengthening body and the ejector rod; the piston rod is of a double-piston structure, the piston at the lower part of the piston rod is positioned in the lower cavity, the piston is arranged at the upper part of the piston rod, the piston at the upper part and the piston rod are tightly pressed and fixed by a nut, and one end of the ejector rod is fixed in a cavity of the nut; the other end of the ejector rod extends out of the valve cover; the spring is arranged between the upper piston of the piston rod and the valve cover; the built-in upper and lower double-piston and spring reset actuating mechanism meets the opening and closing action time of the valve, simultaneously realizes the minimization of the specification of the actuating mechanism, and the built-in structure avoids the leakage of a medium; the reset spring plays an auxiliary role when the valve is closed, and plays a buffering role when the valve is opened, so that the impact of quick opening on the valve is reduced.
Description
Technical Field
The utility model relates to a spring reset structure's angle stop valve is taken to two piston guide formulas is applicable to the special valve of the super large bore of opening fast under high temperature, high-pressure condition, belongs to machinery.
Background
The angle type stop valve with the ultra-large caliber double-piston pilot type belt spring reset structure is required to be opened quickly within 0.1-0.3 second and closed within 20 seconds, special consideration is needed for valve design, and the purposes of quick opening, closing within a specified time and long-time safe operation can be achieved.
Disclosure of Invention
In order to guarantee that the valve can normal operating under high temperature, highly compressed adverse conditions to open fast, the utility model aims at providing a two piston guide's formula take spring reset structure's angle type stop valve, this structure can be under the drive of medium self-pressure, realize opening in 0.1~0.3 seconds, close fast in 20 seconds to the valve is opened steam flow and can reach 1060~1270t/h entirely.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: double piston guide's formula area spring reset structure angle formula stop valve includes: the valve comprises a valve body, a valve seat, a valve clack, a double-piston spring reset actuating mechanism, a valve cover, a support and a sealing device; the double-piston spring return actuating mechanism comprises: the upper piston cylinder sleeve, the piston, the nut, the lower piston cylinder sleeve, the piston rod, the spring, the lengthening body and the ejector rod; the valve seat and the valve body are welded into a whole, and the valve body, the elongated body and the valve cover are connected through bolts; the valve clack is in threaded connection with the lower end of the piston rod, the lower piston cylinder sleeve is connected with the lower end of the lengthened body through a bolt, and the lower piston cylinder sleeve and the bottom surface of the lengthened body form a lower cavity; the upper part of the lengthened body is provided with a lengthened body inner cavity, the upper piston cylinder is sleeved in the lengthened body inner cavity, and the upper piston cylinder sleeve is connected with the lengthened body through a bolt; the piston rod is of a double-piston structure, a piston at the lower part of the piston rod is positioned in the lower cavity, a piston is arranged at the upper part of the piston rod, the piston at the upper part is tightly pressed and fixed with the piston rod through a nut, and one end of the ejector rod is fixed in a cavity of the nut; the other end of the ejector rod extends out of the valve cover; the spring is arranged between the upper piston of the piston rod and the valve cover; the support is fixedly connected with the valve cover through a bolt, and the valve cover and the ejector rod are sealed through a sealing device;
further, sealing rings are respectively arranged between the valve body and the elongated body and between the elongated body and the valve cover, and the valve body and the elongated body and the valve cover are respectively sealed and rigidly connected through the sealing rings;
further, a check washer is arranged at the threaded connection position of the valve clack and the lower end of the piston rod and used for preventing the valve clack from loosening;
furthermore, the lower piston cylinder sleeve, the lengthening body and the valve cover form an upper cavity together, and the upper piston of the piston rod is positioned in the upper cavity;
further, piston rings are arranged between the upper piston of the piston rod and the upper piston cylinder sleeve, between the lower piston of the piston rod and the lower piston cylinder sleeve and between the lower piston cylinder sleeve and the valve body;
furthermore, in the double-piston spring reset actuating mechanism, the upper piston cylinder sleeve, the lower piston cylinder sleeve, the upper piston of the piston rod, the lower piston of the piston rod, the piston rod and the lengthening body are all provided with inner diversion holes;
furthermore, the flow guide holes are distributed uniformly in a small-aperture multipoint mode;
furthermore, the flow guide holes of the upper piston of the piston rod and the lower piston of the piston rod can adjust the flow cross-sectional area.
Further, adopt the packing sealed form through sealing device between valve gap and the ejector pin, include: the packing pressing plate and the packing are arranged in the packing cavity between the ejector rod and the valve cover, and the packing is fixed on the valve cover through the packing pressing plate by bolts;
further, still include valve displacement detection analog output device, valve opening and closing position signal feedback device are opened and close to the top of support, are a high reliability multiposition and displacement detection device, include: the device comprises a displacement detection device, a position detection device, a bracket and a stop block; the position switch and the linear displacement sensor are fixed on the bracket; the stop block is fixed at the upper end of the ejector rod and can be adjusted up and down.
Specifically, the structure of the high-reliability multi-position and displacement detection device is as follows:
the two side plate symmetries of support are provided with the guide way of vertical direction, dog slidable sets up in the guide way, the dog passes through the connecting piece and is connected with the valve rod of valve, and the valve rod drives the dog and reciprocates in the guide way during valve switching action, position detection device is including being located the first position sensor subassembly of guide way upper end with be located guide way lower extreme second position sensor subassembly, first position sensor subassembly is used for detecting when the valve is opened completely the position of dog, the second position sensor subassembly is used for detecting when the valve is closed completely the position of dog, the vertical setting of displacement detection device is in on the support, and be located the top of guide way, be used for detecting the valve switching in-process the displacement of dog.
The first position sensor assembly is fixed on the upper part of the side plate on one side of the support, the displacement sensor is vertically fixed on the upper part of the side plate on one side of the support, which is far away from the first position sensor assembly, and when the valve is completely opened, the valve rod drives the stop block to move above the guide groove and trigger the first position sensor assembly; when the valve is completely closed, the valve rod drives the stop block to move below the guide groove and trigger the second position sensor assembly; the displacement sensor feeds back the displacement of the valve rod with different opening degrees along with the up-and-down movement of the stop block.
The first position sensor assembly is one or more open position switches, the second position sensor assembly comprises four off position switches, two off position switches are symmetrically arranged on two sides of the guide groove, and the four off position switches are located at the same height and are correspondingly fixed on two side plates of the support respectively.
The first position sensor assembly is a contact type on-position switch, the second position sensor assembly is an off-position switch, and the displacement sensor is a contact type linear displacement sensor.
The valve body adopts an integral forging process mode, and the integral performance of materials and the integrity of the integral pressure boundary of the valve are ensured.
The valve seal is a streamline valve clack with surfacing and a valve seat plane seal, and hard alloy is surfacing welded on a sealing surface.
Furthermore, the double-piston spring reset actuating mechanism of the utility model adopts a medium pressure self-driven mode, three rows of redundant pilot release holes are arranged at the upper end of the side wall of the valve body, one end of the pilot release hole is communicated with the flow guide hole of the lengthened body, and the other end of the pilot release hole is emptied;
furthermore, the flow guide holes in the piston rod are communicated with the lower cavities of the upper piston and the lower piston, the flow guide holes in the piston and the piston rod lower piston are respectively communicated with the upper cavity and the lower cavity of the upper piston and the lower cavity of the lower piston, the upper cavities of the upper piston and the lower piston are communicated with the pilot release hole, and the lower cavities of the upper piston and the lower piston are communicated with the valve cavity;
when the valve normally operates, the valve is in a closed state, the pressures of the upper cavity and the lower cavity are equal, and the valve is sealed by spring force, medium pressure and gravity; when the valve is opened, the pilot area is emptied, the medium pressure in the upper cavity of the piston is released, the upper cavity and the lower cavity form a pressure difference, and the valve is quickly opened by overcoming the spring force and the gravity under the action of the pressure difference.
The beneficial effects of the utility model reside in that: the double-piston pilot type angle stop valve with the spring return structure can be quickly opened within 0.1-0.3 seconds and closed within 20 seconds; the flow rate of the fully opened steam of the valve can reach 1060-1270 t/h; the built-in upper and lower double-piston and spring reset actuating mechanism meets the opening and closing action time of the valve, simultaneously realizes the minimization of the specification of the actuating mechanism, and the built-in structure avoids the leakage of a medium; the reset spring plays an auxiliary role when the valve is closed, and plays a buffering role when the valve is opened, so that the impact of quick opening on the valve is reduced. The opening time and the closing time of the valve can be adjusted by adjusting the flow area of the internal diversion hole; piston rings are arranged between the piston and the cylinder body, between the rod part of the piston rod and the guide surface, and between the piston part of the piston rod and the cylinder body, so that a certain gap is kept, the contact area of relative motion parts is reduced, the friction force is reduced, and the phenomena of jamming and adhesion are prevented. The piston and the piston cylinder body are made of materials with certain hardness difference, so that the adhesion phenomenon is prevented, and the service life of the valve is prolonged. The valve body adopts an integral forging process mode, and the integral performance of materials and the integrity of the integral pressure boundary of the valve are ensured.
Drawings
Fig. 1 is a front view structure diagram of the present invention.
Fig. 2 is a structural diagram of a double-piston pilot type actuator with spring return.
In the figure, 1, a valve body, 2, a valve seat, 3, a valve clack, 4, a piston rod, 5, a lower piston cylinder sleeve, 6, an elongated body, 7, an upper piston cylinder sleeve, 8, an upper piston, 9, a valve cover, 10, an ejector rod, 11, a spring, 14, a packing press plate, 18, a stop block, 19, a linear displacement sensor, 21, a position switch, 27, a bracket, 32, a sealing ring, 33, a nut, 37, a piston ring, 53, a locking gasket, a pilot release hole, b, an upper piston cavity, c and an upper lower piston cavity.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1-2, the dual-piston pilot type angular stop valve with spring return structure includes: the valve comprises a valve body 1, a valve seat 2, a valve clack 3, a double-piston spring return actuating mechanism, a valve cover 9, a support 27 and a sealing device; the double-piston spring return actuating mechanism comprises: the piston comprises an upper piston cylinder sleeve 7, a piston 8, a nut 33, a lower piston cylinder sleeve 5, a piston rod 4, a spring 11, an elongated body 6 and a mandril 10; the valve seat 2 and the valve body 1 are welded into a whole, and the valve body 1, the elongated body 6 and the valve cover 9 are connected through bolts; the valve clack 3 is in threaded connection with the lower end of the piston rod 4, the lower end of the lower piston cylinder sleeve 5 is connected with the lower end of the lengthened body 6 through a bolt, and a lower cavity c is formed by the lower piston cylinder sleeve 5 and the bottom surface of the lengthened body 6; an elongated body inner cavity is formed in the upper portion of the elongated body 6, the upper piston cylinder sleeve 7 is arranged in the elongated body inner cavity, and the upper piston cylinder sleeve 7 is connected with the elongated body 6 through bolts; the piston rod 4 is of a double-piston structure, a piston at the lower part of the piston rod 4 is positioned in the lower cavity, a piston 8 is arranged at the upper part of the piston rod 4, the piston 8 at the upper part and the piston rod 4 are pressed and fixed by a nut 33, and one end of the ejector rod 10 is fixed in a cavity of the nut 33; the other end of the ejector rod 10 penetrates through and extends out of the valve cover 9; the spring 11 is arranged between the upper piston 8 of the piston rod 4 and the valve cover 9; the bracket 27 is fixedly connected with the valve cover 9 through a bolt, and the valve cover 9 and the ejector rod 10 are sealed through a sealing device;
sealing rings 32 are respectively arranged between the valve body 1 and the elongated body 6 and between the elongated body 6 and the valve cover 9, and the valve body 1 and the elongated body 6 and between the elongated body 6 and the valve cover 9 are respectively sealed by the sealing rings 32 and are in rigid contact;
the threaded connection position of the valve clack 3 and the lower end of the piston rod 4 is also provided with a check washer 53 for preventing the valve clack 3 from loosening;
the lower piston cylinder sleeve 5, the lengthening body 6 and the valve cover 9 together form an upper cavity b, and the upper piston 8 of the piston rod 4 is positioned in the upper cavity;
in the double-piston spring reset actuating mechanism, an upper piston cylinder sleeve 7, a lower piston cylinder sleeve 5, an upper piston 8 of a piston rod 4, a lower piston of the piston rod 4, the piston rod 4 and an extension body 6 are all provided with inner diversion holes;
the valve gap 9 and the ejector rod 10 adopt a packing sealing form through a sealing device, and the packing sealing device comprises: the packing pressing plate 14 and the packing are arranged in a packing cavity between the ejector rod 10 and the valve cover 9, and the packing is fixed on the valve cover 9 through the packing pressing plate 14 by bolts;
still include valve displacement detection analog quantity output device, valve opening and closing position signal feedback device on support 27's top, include: a position switch 21, a linear displacement sensor 19, a stopper 18; the position switch 21 and the linear displacement sensor 19 are fixed on the bracket 27; the stop block 18 is fixed on the upper end of the mandril 10 and can be adjusted up and down.
The valve seal is a plane seal with a surfacing streamline valve clack 3 and a valve seat 2, and a hard alloy is surfacing welded on a sealing surface.
The driving mode of the double-piston spring reset actuating mechanism of the utility model is medium pressure self-driving, three rows of redundant pilot release holes a are arranged at the upper end of the side wall of the valve body, one end of the pilot release hole a is communicated with the diversion hole of the lengthened body 6, and the pilot release hole a is emptied;
the inner diversion hole of the piston rod 4 is communicated with the lower cavities of the upper and lower pistons, the diversion holes on the piston and the piston rod lower part piston are respectively communicated with the upper and lower cavities of the upper and lower pistons, the upper cavities of the upper and lower pistons are communicated with the pilot release hole, and the lower cavities of the upper and lower pistons are communicated with the valve cavity;
the utility model discloses a theory of operation lies in:
when the valve normally operates, the valve is in a closed state, the pressures of the upper cavity and the lower cavity are equal, and the valve is sealed by spring force, medium pressure and gravity; when the valve is opened, the pilot area is emptied, the medium pressure in the upper cavity of the piston is released, the upper cavity and the lower cavity form a pressure difference, and the valve is quickly opened by overcoming the spring force and the gravity under the action of the pressure difference.
Adopt the utility model discloses a two piston spring reset actuator open the specific operating condition of operation to the valve is:
the medium enters from the inlet end of the valve, enters the lower piston lower cavity through the diversion hole on the lower end surface of the lower piston cylinder sleeve 5, then flows to the lower piston upper cavity c and the upper piston lower cavity through the diversion hole on the lower piston rod and the diversion hole in the center of the piston rod from the lower piston lower cavity, enters the upper piston upper cavity b through the diversion hole on the upper piston after entering the upper piston lower cavity, and when the upper piston lower cavity, the lower piston upper cavity and the lower cavity as well as the pilot a are filled with the medium, the pressures of the upper and lower cavities of the piston are equal, and the valve clack 3 is closed under the combined action of the piston rod 4, the piston 8, the self gravity and the elasticity of the spring 11.
When the valve is opened, the pilot discharge hole is communicated for emptying, the upper cavity medium of the upper piston and the upper cavity medium of the lower piston are quickly emptied through the pilot discharge hole a, pressure difference is formed between the upper cavity medium and the lower cavity medium of the piston due to the interception effect of the upper guide holes of the piston 8 and the lower piston of the piston rod 4, and the valve is opened when the acting force of the pressure difference is larger than the resultant force of the gravity of the valve clack 3, the piston rod 4 and the piston 8 and the elastic force of the spring 11.
The above, only be the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and all the technicians familiar with the technical field are in the technical scope of the present invention, according to the technical scheme of the present invention and the concept of the present invention equivalent replacement or change should be covered within the protection scope of the present invention.
Claims (9)
1. The utility model provides a two piston pilot operated take spring return structure's angle formula stop valve which characterized in that includes: the valve comprises a valve body, a valve seat, a valve clack, a double-piston spring reset actuating mechanism, a valve cover, a support and a sealing device; the double-piston spring return actuating mechanism comprises: the upper piston cylinder sleeve, the piston, the nut, the lower piston cylinder sleeve, the piston rod, the spring, the lengthening body and the ejector rod; the valve seat and the valve body are welded into a whole, and the valve body, the elongated body and the valve cover are connected through bolts; the valve clack is in threaded connection with the lower end of the piston rod, the lower piston cylinder sleeve is connected with the lower end of the lengthened body through a bolt, and the lower piston cylinder sleeve and the bottom surface of the lengthened body form a lower cavity; the upper part of the lengthened body is provided with a lengthened body inner cavity, the upper piston cylinder is embedded in the lengthened body inner cavity, and the upper piston cylinder sleeve is connected with the lengthened body through a bolt; the piston rod is of a double-piston structure, a piston at the lower part of the piston rod is positioned in the lower cavity, a piston is arranged at the upper part of the piston rod, the piston at the upper part and the piston rod are tightly pressed and fixed by a nut, and one end of the ejector rod is fixed in a cavity of the nut; the other end of the ejector rod extends out of the valve cover; the spring is arranged between the upper piston of the piston rod and the valve cover; the support is fixedly connected with the valve cover through a bolt, and the valve cover and the ejector rod are sealed through a sealing device.
2. The double-piston pilot operated angle stop valve with spring return structure of claim 1, wherein: and sealing rings are respectively arranged between the valve body and the lengthening body and between the lengthening body and the valve cover, and the valve body and the lengthening body and the valve cover are respectively sealed by the sealing rings and are in rigid contact.
3. The double-piston pilot operated angle stop valve with spring return structure of claim 1, wherein: the lower piston cylinder sleeve, the lengthening body and the valve cover jointly form an upper cavity, and the upper piston of the piston rod is positioned in the upper cavity.
4. The double-piston pilot operated angle stop valve with spring return structure of claim 1, wherein: piston rings are arranged between the upper piston of the piston rod and the upper piston cylinder sleeve, between the lower piston of the piston rod and the lower piston cylinder sleeve and between the lower piston cylinder sleeve and the valve body.
5. The double-piston pilot operated angle stop valve with spring return structure of claim 1, wherein: in the double-piston spring reset actuating mechanism, the upper piston cylinder sleeve, the lower piston cylinder sleeve, the upper piston of the piston rod, the lower piston of the piston rod, the piston rod and the lengthened body are all provided with inner diversion holes.
6. The double-piston pilot operated angle stop valve with spring return structure of claim 1, wherein: adopt the packing sealed form through sealing device between valve gap and the ejector pin, include: the packing pressing plate and the packing are arranged in the packing cavity between the ejector rod and the valve cover, and the packing is fixed on the valve cover through the packing pressing plate by bolts.
7. The double-piston pilot operated angle stop valve with spring return structure of claim 1, wherein: still include valve displacement detection analog output device, valve opening and closing position signal feedback device that opens and close in the top of support, include: a position switch, a linear displacement sensor and a stop block; the position switch and the linear displacement sensor are fixed on the bracket; the stop block is fixed at the upper end of the ejector rod.
8. The double-piston pilot operated angle stop valve with spring return structure of claim 1, wherein: the double-piston spring reset actuating mechanism is driven by medium pressure, a pilot release hole is formed in the side wall of the upper end of the valve body, one end of the pilot release hole is communicated with a flow guide hole of the lengthened body, and the other end of the pilot release hole is emptied.
9. The double-piston pilot operated angle stop valve with spring return of claim 5, wherein: the inner diversion holes of the piston rod are communicated with the lower cavities of the upper piston and the lower piston, the diversion holes on the piston and the piston rod lower part piston are respectively communicated with the upper cavity and the lower cavity of the upper piston and the lower cavity of the lower piston, the upper cavities of the upper piston and the lower piston are communicated with the pilot release hole, and the lower cavities of the upper piston and the lower piston are communicated with the valve cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005490.9U CN216479217U (en) | 2021-12-02 | 2021-12-02 | Double-piston pilot type angle type stop valve with spring reset structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123005490.9U CN216479217U (en) | 2021-12-02 | 2021-12-02 | Double-piston pilot type angle type stop valve with spring reset structure |
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| Publication Number | Publication Date |
|---|---|
| CN216479217U true CN216479217U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123005490.9U Active CN216479217U (en) | 2021-12-02 | 2021-12-02 | Double-piston pilot type angle type stop valve with spring reset structure |
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| CN (1) | CN216479217U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017538A (en) * | 2021-12-02 | 2022-02-08 | 大连大高阀门股份有限公司 | Double-piston pilot type angle type stop valve with spring reset structure |
-
2021
- 2021-12-02 CN CN202123005490.9U patent/CN216479217U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017538A (en) * | 2021-12-02 | 2022-02-08 | 大连大高阀门股份有限公司 | Double-piston pilot type angle type stop valve with spring reset structure |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A dual piston pilot angle globe valve with spring return structure Effective date of registration: 20230927 Granted publication date: 20220510 Pledgee: Dalian Branch of Shanghai Pudong Development Bank Co.,Ltd. Pledgor: DALIAN DV VALVE Co.,Ltd. Registration number: Y2023980059639 |