CN211901668U - Forge welding structure inlet valve - Google Patents
Forge welding structure inlet valve Download PDFInfo
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- CN211901668U CN211901668U CN202020340708.2U CN202020340708U CN211901668U CN 211901668 U CN211901668 U CN 211901668U CN 202020340708 U CN202020340708 U CN 202020340708U CN 211901668 U CN211901668 U CN 211901668U
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Abstract
The utility model discloses a forge welding structure inlet valve mainly includes valve body etc. and inside bypass runner, entry runner, the exit runner of being equipped with of valve body, the bypass runner is located the entry runner top and through last valve seat draft tube intercommunication between the two, goes up the valve seat draft tube and installs on the valve body and seal by O type sealing washer, and the entry runner below is exit runner and sets up disk seat down between the two, sets up the valve clack control between lower disk seat and the last valve seat draft tube and opens and close. The utility model adopts the forge welding valve body to improve the organization structure and mechanical property of the valve body, prolong the service life of the valve and facilitate the nondestructive testing of UT ultrasonic wave and the like; the lower valve seat is provided with a welding deformation stress groove, so that the welding deformation of the lower valve seat and the valve body is reduced; the valve cover and the valve body are sealed by adopting a self-sealing structure, so that the sealing is reliable; the upper valve seat guide cylinder is designed into a small hole structure form, so that the vibration reduction and noise reduction effects can be realized; the valve rod is designed into double-line trapezoidal threads, and can quickly respond to a water level alarm signal of the high-pressure heater.
Description
Technical Field
The utility model relates to a field of inlet valve, concretely relates to forge welding structure inlet valve.
Background
The inlet valve of forge welding structure is a special valve applied to the inlet of water supply pipeline of high-pressure heater of high-parameter boiler of above 350 MW. The traditional casting structure form inlet valve has the defects of not strict casting structure due to inherent shortage, even sand holes, looseness, segregation, air holes, slag inclusion and the like, and the conditions of 'running, overflowing, dripping, leaking' and the like commonly occur in the operation, so that accident potential is brought to the safe operation of a unit. The forged structure inlet and outlet valve adopts a forge welding valve body, a middle cavity self-sealing structure form and an electro-hydraulic linkage device to realize quick full opening and full closing of the valve, and the requirement of a high-pressure heater protection system of a unit boiler above 350MW is met.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects existing in the prior art and provide an inlet valve with a forge welding structure.
The purpose of the utility model is accomplished through following technical scheme: the inlet valve with the forge welding structure mainly comprises a valve body, a lower valve seat, a valve clack, an O-shaped sealing ring, an upper valve seat guide cylinder, a valve rod, a valve cover, a self-sealing ring, a four-open ring, a supporting plate, a support, a guide block, a valve rod nut, a nut steel sleeve, a one-way thrust ball bearing, an electric device, a bypass flow passage, an inlet flow passage and an outlet flow passage, wherein the bypass flow passage, the inlet flow passage and the outlet flow passage are arranged inside the valve body, the bypass flow passage is positioned above the inlet flow passage and communicated with each other through the upper valve seat guide cylinder, the upper valve seat guide cylinder is arranged on the valve body and sealed by the O-shaped sealing ring, the outlet flow passage is arranged below the inlet flow passage, a lower valve seat is arranged between the inlet flow passage and the upper valve seat guide cylinder, the valve clack is arranged between the lower valve seat and, the valve cover is installed in the top end of the valve body and sealed through the self-sealing ring, the four-open ring and the supporting plate are installed above the valve cover, the guide block guide valve rod is arranged inside the support, and the valve rod is installed on the top of the support in a matched mode through a valve rod nut, a nut steel sleeve and a one-way thrust ball bearing.
The valve body is machined by adopting a forged piece.
And the surfacing welding material of the sealing surface of the lower valve seat is cobalt-based hard alloy with small linear expansion coefficient and high red hardness.
And the lower valve seat is provided with a stress reducing groove.
The valve rod adopts a double-line trapezoidal thread design.
The valve cover and the valve body are sealed by adopting a self-sealing structure.
The upper valve seat guide cylinder is of a small-hole structure.
The utility model has the advantages that: the utility model adopts the forge welding valve body to improve the organization structure and mechanical property of the valve body, prolong the service life of the valve, facilitate the nondestructive testing of UT ultrasonic wave and the like, and greatly improve the reliability of the valve; the lower valve seat is provided with a welding deformation stress groove, so that the welding deformation of the lower valve seat and the valve body is reduced, and the sealing property of the valve is improved; the valve cover and the valve body are sealed by adopting a self-sealing structure, so that the sealing is reliable, the pressure is higher, and the sealing performance is better; the upper valve seat guide cylinder is designed into a small hole structure form, so that the vibration and noise reduction effects can be realized, and the valve has small vibration and low noise; the valve rod is designed into a double-line trapezoidal thread, so that the valve can be quickly and fully opened and closed, and a water level alarm signal of the high-pressure heater can be quickly responded; compact structure, simple and beautiful shape.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals: the valve comprises a valve body 1, a lower valve seat 2, a valve clack 3, an O-shaped sealing ring 4, an upper valve seat guide cylinder 5, a valve rod 6, a valve cover 7, a self-sealing ring 8, a four-open ring 9, a supporting plate 10, a support 11, a guide block 12, a valve rod nut and nut steel sleeve 13, a one-way thrust ball bearing 14, an electric device 15, a bypass flow channel 16, an inlet flow channel 17 and an outlet flow channel 18.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings:
example (b): as shown in the attached drawing, the inlet valve with the forge welding structure mainly comprises a valve body 1, a lower valve seat 2, a valve clack 3, an O-shaped sealing ring 4, an upper valve seat guide cylinder 5, a valve rod 6, a valve cover 7, a self-sealing ring 8, a four-open ring 9, a supporting plate 10, a support 11, a guide block 12, a valve rod nut and a nut steel sleeve 13, a one-way thrust ball bearing 14, an electric device 15, a bypass flow channel 16, an inlet flow channel 17 and an outlet flow channel 18, wherein the valve body 1 is machined by adopting a forge piece, the defects of sand holes, looseness, segregation, air holes, slag inclusion and the like of a cast valve are avoided, the pressure resistance and the reliability are greatly improved, the phenomena of leakage, overflow, dripping and leakage of the high-pressure valve which commonly exist are avoided, and meanwhile. The valve body 1 is internally provided with a bypass flow passage 16, an inlet flow passage 17 and an outlet flow passage 18, the bypass flow passage 16 is positioned above the inlet flow passage 17 and is communicated with the inlet flow passage 17 through an upper valve seat guide cylinder 5, the upper valve seat guide cylinder 5 is of a small hole structure, the vibration and noise reduction effects can be realized, the valve vibration is small, and the noise is low. The upper valve seat guide cylinder 5 is arranged on the valve body 1 and sealed by an O-shaped sealing ring 4, an outlet flow passage 18 is arranged below the inlet flow passage 17, a lower valve seat 2 is arranged between the inlet flow passage and the outlet flow passage, and the cobalt-based hard alloy with small linear expansion coefficient and high red hardness is selected as a surfacing welding material of a sealing surface of the lower valve seat 2. A stress reduction groove is designed on the lower valve seat 2, and the deformation of the sealing surface of the lower valve seat 2 caused by the welding deformation of the valve body 1 is avoided, so that the sealing performance of the valve is improved, and the service life of the valve is prolonged. Set up valve clack 3 between lower disk seat 2 and the last valve seat draft tube 5 and control and open and close, connect valve rod 6 on the valve clack 3, valve rod 6 upwards wears out last valve seat draft tube 5 and is connected to the electric actuator 15 at top, and electric actuator 15 passes through support 11 and installs on 1 top of valve body, installs valve gap 7 in 1 top of valve body and seals through from sealing washer 8, and valve gap 7 and 1 sealed adoption self-sealing structure of valve body, sealed reliable, pressure is higher, and sealing performance is better. Four-open ring 9 and supporting plate 10 are installed above valve cover 7, guide block 12 is arranged in support 11 to guide valve rod 6, and valve rod 6 is installed at the top of support 11 through valve rod nut and nut steel bushing 13 and one-way thrust ball bearing 14 in a matching mode. The valve rod 6 adopts a double-line trapezoidal thread design, the lead of the double-line trapezoidal thread is twice that of the single-line trapezoidal thread, the full opening and closing time is shortened to a half of that of a common single-line trapezoidal thread valve, and the quick response time is doubled.
The utility model discloses the theory of operation: after receiving a 4-20 mA water level alarm feedback signal of the high-pressure heater, the electric device 15 of the forge welding inlet valve drives the valve rod 6 to ascend or descend to drive the valve clack 3 to make up-and-down linear displacement so as to achieve the purpose of opening and closing.
The closing principle of the forge welding inlet valve is as follows: the lower sealing surface of the valve clack 3 is tightly attached to the sealing surface of the lower valve seat 2 by means of the pressure of the valve rod 6, so that boiler feed water is prevented from flowing into the high-pressure heater, and the boiler feed water flows into the bypass flow channel 16 from the guide cylinder 5 of the upper valve seat.
The opening principle of the forge welding inlet valve is as follows: by means of the pulling force of the valve rod 6, the upper sealing surface of the valve clack 6 is tightly attached to the sealing surface of the upper valve seat guide cylinder 5, boiler feed water is prevented from flowing into the bypass flow passage 16 from the upper valve seat guide cylinder 5, and the boiler feed water flows into the high-pressure heater.
It should be understood that equivalent substitutions or changes to the technical solution and the inventive concept of the present invention should be considered to fall within the scope of the appended claims for the skilled person.
Claims (7)
1. A forge welded construction inlet valve comprising: mainly comprises a valve body (1), a lower valve seat (2), a valve clack (3), an O-shaped sealing ring (4), an upper valve seat guide cylinder (5), a valve rod (6), a valve cover (7), a self-sealing ring (8), a four-open ring (9), a support plate (10), a support (11), a guide block (12), a valve rod nut and nut steel sleeve (13), a one-way thrust ball bearing (14), an electric device (15), a bypass flow channel (16), an inlet flow channel (17) and an outlet flow channel (18), wherein the valve body (1) is internally provided with the bypass flow channel (16), the inlet flow channel (17) and the outlet flow channel (18), the bypass flow channel (16) is positioned above the inlet flow channel (17) and communicated with the inlet flow channel (17) through the upper valve seat guide cylinder (5), the upper valve seat guide cylinder (5) is arranged on the valve body (1) and sealed by the O-shaped sealing ring (4), the outlet flow channel (18, set up valve clack (3) control between lower disk seat (2) and last disk seat draft tube (5) and open and close, connect valve rod (6) on valve clack (3), valve rod (6) upwards wear out last disk seat draft tube (5) and are connected to electric actuator (15) at top, electric actuator (15) are installed on valve body (1) top through support (11), install valve gap (7) and seal through from sealing washer (8) in valve body (1) top, four ring opening (9) and backup pad (10) are installed to valve gap (7) top, support (11) inside is equipped with guide block (12) direction valve rod (6), valve rod nut and nut steel bushing (13) and thrust ball bearing (14) cooperation installation valve rod (6) are passed through at support (11) top.
2. A forge welding construction inlet valve according to claim 1, wherein: the valve body (1) is machined by adopting a forging piece.
3. A forge welding construction inlet valve according to claim 1, wherein: and the surfacing welding material of the sealing surface of the lower valve seat (2) is cobalt-based hard alloy with small linear expansion coefficient and high red hardness.
4. A forge welded construction inlet valve according to claim 1 or 3, wherein: and a stress reducing groove is designed on the lower valve seat (2).
5. A forge welding construction inlet valve according to claim 1, wherein: the valve rod (6) adopts a double-line trapezoidal thread design.
6. A forge welding construction inlet valve according to claim 1, wherein: the valve cover (7) and the valve body (1) are sealed by adopting a self-sealing structure.
7. A forge welding construction inlet valve according to claim 1, wherein: the upper valve seat guide cylinder (5) is of a small hole structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020340708.2U CN211901668U (en) | 2020-03-18 | 2020-03-18 | Forge welding structure inlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020340708.2U CN211901668U (en) | 2020-03-18 | 2020-03-18 | Forge welding structure inlet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211901668U true CN211901668U (en) | 2020-11-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020340708.2U Active CN211901668U (en) | 2020-03-18 | 2020-03-18 | Forge welding structure inlet valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211901668U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325194A (en) * | 2022-10-17 | 2022-11-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Energy-saving valve easy and convenient to disassemble, assemble and maintain |
-
2020
- 2020-03-18 CN CN202020340708.2U patent/CN211901668U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325194A (en) * | 2022-10-17 | 2022-11-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Energy-saving valve easy and convenient to disassemble, assemble and maintain |
| CN115325194B (en) * | 2022-10-17 | 2023-02-03 | 中国空气动力研究与发展中心高速空气动力研究所 | Energy-saving valve easy and convenient to disassemble, assemble and maintain |
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