CN113324095B - Internal pilot type gate valve - Google Patents
Internal pilot type gate valve Download PDFInfo
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- CN113324095B CN113324095B CN202110743360.0A CN202110743360A CN113324095B CN 113324095 B CN113324095 B CN 113324095B CN 202110743360 A CN202110743360 A CN 202110743360A CN 113324095 B CN113324095 B CN 113324095B
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- valve
- groove
- sleeve
- flashboard
- valve rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K39/00—Devices for relieving the pressure on the sealing faces
- F16K39/04—Devices for relieving the pressure on the sealing faces for sliding valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/0209—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor the valve having a particular passage, e.g. provided with a filter, throttle or safety device
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
- Sliding Valves (AREA)
Abstract
The invention discloses an internal pilot gate valve, which comprises a valve body, a valve seat, a flashboard, a valve rod and a valve cover, and is characterized in that: the valve rod can be lifted and rotated to penetrate through the valve cover, the upper section of the valve rod is connected with a driving mechanism, the lower section of the valve rod is sleeved with an inner sleeve and an outer sleeve, the lower end of the inner sleeve is connected with the flashboard, the inner circle of the inner sleeve is provided with a vertical groove, an inner spiral groove and a transverse groove which are sequentially communicated, the corresponding valve rod is provided with a lower key arranged in the inner spiral groove in a matching way, the outer sleeve is positioned outside the inner sleeve, the outer circle of the outer sleeve is provided with a guide groove and an outer spiral groove which are communicated, the corresponding valve body is provided with a guide rod arranged in the guide groove in a matching way, the outer sleeve is also provided with two transverse pins in a penetrating way, and the two transverse pins extend into the transverse grooves; be equipped with the pressure release passageway in the flashboard, liquid inlet hole on the flashboard left side, establish the liquid outlet on the flashboard right side, and pressure release passageway sets and leads the valve clack, and lead the valve clack and can reciprocate and arrange in the flashboard, and but the pilot valve clack upper end circumferential direction, axial drive connect in the valve rod lower extreme. The flashboard is easy to open and labor-saving.
Description
Technical Field
The invention relates to an improved gate valve, in particular to an improved internal pilot gate valve.
Background
The gate valve is mainly used in petroleum, chemical industry, pharmacy, electric power and other industrial industries, and when the traditional gate valve, especially a large-caliber or high-pressure gate valve is opened, the opening torque is large and the opening is difficult due to large differential pressure in front of and behind the gate plate.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides the internal guide type gate valve with the easily opened and closed gate plate and the labor-saving function.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme: the internal guide type gate valve comprises a valve body, a valve seat, a gate plate, a valve rod and a valve cover, wherein a medium channel is arranged on the lower portion of the valve body, a cavity is arranged on the upper portion of the valve body, the valve seat and the gate plate are in sealing fit in the medium channel, and the valve cover is arranged on the upper end of the valve body and is characterized in that: the valve rod can be lifted and rotated to penetrate through the valve cover, the upper section of the valve rod is connected with a driving mechanism, an inner sleeve and an outer sleeve are sleeved on the lower section of the valve rod, the lower end of the inner sleeve is connected with the flashboard, a vertical groove, an inner spiral groove and a transverse groove are formed in the inner circle of the inner sleeve, the transverse groove is communicated with the upper end of the inner spiral groove, the lower end of the inner spiral groove is communicated with the upper end of the vertical groove, a lower key arranged in the inner spiral groove is arranged on the corresponding valve rod in a matched mode, the outer sleeve is located on the outer side of the inner sleeve, a guide groove and an outer spiral groove are formed in the outer circle of the outer sleeve, the lower end of the outer spiral groove is communicated with the upper end of the guide groove, a guide rod arranged in the guide groove is arranged on the corresponding valve body in a matched mode, two transverse pins are further arranged on the outer sleeve in a penetrating mode, the two transverse pins extend into the transverse grooves, and the two transverse pins are provided with intervals corresponding to the upper ports of the inner spiral groove; be equipped with the pressure release passageway in the flashboard, be equipped with the feed liquor hole of intercommunication pressure release passageway lower part on the flashboard left side, be equipped with the liquid outlet hole on intercommunication pressure release passageway upper portion on the flashboard right side, and pressure release passageway sets and leads the valve clack, but leads the valve clack and reciprocate to arrange in the flashboard, but and the pilot valve clack upper end circumferential direction, axial transmission connect in the valve rod lower extreme.
The pressure relief channel is also internally provided with a pulling plate capable of moving left and right, the pulling plate is provided with a compression spring, the pulling plate is positioned below the liquid inlet hole, the lower end of the pulling plate is provided with a hook head, the hook head extends out of the bottom hole of the gate plate, a corresponding valve body is internally provided with a cushion block, the cushion block is provided with a groove, the groove is in limit fit with the hook head, the upper end face of the cushion block is provided with a sealing ring, and the sealing ring is in sealing fit with the lower end face of the gate plate; the lower end of the guide valve clack is connected with a push rod, and the push rod is in transmission fit with the pull plate.
The upper section of the pulling plate is provided with a driving inclined plane which is in transmission fit with the lower end of the push rod.
The driving mechanism comprises a hand wheel, a support and a conversion sleeve, the support is mounted at the upper end of the valve cover, the conversion sleeve can rotate in the circumferential direction and is sleeved on the upper section of the valve rod in an axial transmission manner, an upper key is arranged at the lower part of the conversion sleeve, an upper key groove is formed in the corresponding support and is matched with the upper key groove, a threaded sleeve is rotatably arranged at the upper end of the support, a threaded connection sleeve of the threaded sleeve is arranged on the conversion sleeve, and the threaded sleeve is connected with the hand wheel in a transmission manner.
The upper end of the pilot valve is provided with an inverted T-shaped groove, the lower end of the valve rod is provided with an inverted T-shaped head, and the inverted T-shaped head can rotate in the circumferential direction and is axially limited and arranged in the T-shaped groove.
The improved inner pilot type gate valve has the advantages that the improved inner pilot type gate valve is provided with the inner sleeve, the outer sleeve and the pilot valve flap, the pilot valve flap is opened easily and conveniently before the gate valve is opened, a medium at an inlet side enters an outlet side from a liquid inlet hole and a liquid outlet hole, the pressure difference between the inlet side and the outlet side is reduced, then the gate plate is driven to be opened upwards easily, meanwhile, the pilot valve flap is closed after the gate plate is closed, the pressure difference between the inlet side and the outlet side is small in the process of closing the gate plate, and when the gate plate is closed, the gate plate is closed easily and labor-saving. Meanwhile, the manufacturing cost is low, the number of external interfaces is small, and leakage is not easy to occur.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the closed state of the present invention.
FIG. 2 is a schematic structural diagram of the open state of the present invention.
Fig. 3 is a schematic diagram of the inner sleeve structure of the present invention.
Fig. 4 is a schematic view of the structure of the jacket of the present invention.
Fig. 5 is a cross-sectional view D-D of fig. 1 in accordance with the present invention.
Fig. 6 is a cross-sectional view E-E of fig. 2 of the present invention.
Fig. 7 is a partially enlarged view of fig. 1 of the present invention.
Detailed Description
The drawings show the structure of the invention, and the details thereof are further described below with reference to the drawings. In the embodiment, the internal guide type gate valve comprises a valve body 1, a valve seat 3, a gate plate 7, a valve rod 15 and a valve cover 17, wherein a medium channel is arranged at the lower part of the valve body 1, a cavity is arranged at the upper part of the valve body 1, the valve seat 3 and the gate plate 7 are in sealing fit in the medium channel, the valve seat 3 is arranged in the valve body 1 through a seat sleeve 2, the valve cover 17 is arranged at the upper end of the valve body 1 and is connected through a fastening piece 16, the valve rod 15 can be lifted and rotatably arranged on the valve cover 17, a driving mechanism is connected at the upper section of the valve rod 15, an inner sleeve 11 and an outer sleeve 9 are sleeved on the lower section of the valve rod 15, the lower end of the inner sleeve 11 is connected with the gate plate 7 and fixed through an anti-rotation pin 30, a vertical groove 12, an inner spiral groove 39 and a transverse groove 28 are arranged on the inner circle of the inner sleeve 11, the transverse groove 28 is communicated with the upper end of the inner spiral groove 39, the lower end of the inner spiral groove 39 is communicated with the upper end of the vertical groove 12, the corresponding valve rod 15 is provided with a lower key 13 arranged in the inner spiral groove 39, the outer sleeve 9 is positioned outside the inner sleeve 11, the outer circle of the outer sleeve 9 is provided with a guide groove 10 and an outer spiral groove 41, the lower end of the outer spiral groove 41 is communicated with the upper end of the guide groove 10, the corresponding valve body 1 is provided with a guide rod 14 arranged in the guide groove 10, the outer sleeve 9 is also provided with two transverse pins 29 in a penetrating manner, the corresponding outer sleeve 9 is provided with a transverse hole 40, the two transverse pins 29 extend into the transverse groove 28, and the two transverse pins 29 have intervals corresponding to the upper end openings of the inner spiral groove 39; be equipped with the pressure release passageway in the flashboard 7, be equipped with the feed liquor hole 4 of intercommunication pressure release passageway lower part on the flashboard 7 left side, be equipped with the liquid outlet hole 31 that communicates pressure release passageway upper portion on the flashboard 7 right side, and pressure release passageway sets up guide valve lamella 8, and guide valve lamella 8 can reciprocate to be arranged in flashboard 7, and but guide valve lamella 8 upper end circumferential direction, axial transmission connect in the lower extreme of valve rod 15.
As a further improved specific embodiment, a pulling plate 36 capable of moving left and right is further arranged in the pressure relief channel, the pulling plate 36 is provided with a compression spring 38, the pulling plate 36 is positioned below the liquid inlet hole 4, a hook head 37 is arranged at the lower end of the pulling plate 36, the hook head 37 extends out of a bottom hole 35 of the gate plate 7, a cushion block 34 is correspondingly arranged in the valve body 1, a groove is arranged on the cushion block 34, the groove is in limit fit with the hook head 37, a sealing ring 33 is arranged on the upper end face of the cushion block 34, and the sealing ring 33 is in sealing fit with the lower end face of the gate plate 7; the lower end of the guide valve flap 8 is connected with a push rod 5, and the push rod 5 is in transmission fit with the pulling plate 36.
As a further improved embodiment, the upper section of the pulling plate 36 is provided with a driving inclined surface, and the driving inclined surface is in transmission fit with the lower end of the push rod 5.
As a specific embodiment of further improvement, the driving mechanism includes a hand wheel 23, a support 18 and a conversion sleeve 19, the support 18 is mounted at the upper end of the valve cap 17, the conversion sleeve 19 is circumferentially rotatable and axially sleeved on the upper section of the valve rod 15, the upper end of the specific valve rod 15 is axially and drivingly connected to the upper end of the conversion sleeve 19 through a split ring 25, the split ring 25 is fixed by a limit sleeve 24, an upper key 27 is disposed at the lower part of the conversion sleeve 19, an upper key groove 26 is disposed on the corresponding support 18, the upper key 27 is matched with the upper key groove 26, a threaded sleeve 20 is rotatably disposed at the upper end of the support 18 through a bearing 21, the threaded sleeve 20 is threadedly and rotatably sleeved on the conversion sleeve 19, the threaded sleeve 20 is drivingly connected to the hand wheel 23, and the hand wheel 23 is fixedly sleeved on the outer circle of the threaded sleeve 20 through a positioning sleeve 22.
As a further improved specific implementation mode, the upper end of the guide valve clack 8 is provided with an inverted T-shaped groove, the lower end of the valve rod 15 is provided with an inverted T-shaped head, and the inverted T-shaped head can rotate in the circumferential direction and is axially limited and arranged in the T-shaped groove.
The using method of the invention comprises the following steps:
the starting process comprises the following steps: the handwheel 23 is rotated to drive the threaded sleeve 20 to rotate in the same direction, the threaded connection is formed between the threaded sleeve 20 and the conversion sleeve 19, meanwhile, the upper key 27 is arranged at the lower part of the conversion sleeve 19 to prevent the conversion sleeve 19 from rotating, the conversion sleeve 19 moves upwards to drive the valve rod 15 to move upwards, the lower key 13 is arranged at the middle part of the valve rod 15, the lower key 13 is arranged in the inner spiral groove 39, the valve rod 15 rotates and moves upwards, the valve rod 15 drives the guide valve clack 8 to move upwards, the liquid inlet hole 4 is communicated with the liquid outlet hole 31, partial medium at the inlet side 6 passes through the liquid inlet hole 4 and the liquid outlet hole 31 to enter the outlet side 32, the front and back pressure difference of the flashboard 7 is reduced, the lower key 13 enters the transverse groove 28 along the inner spiral groove 39 and is arranged at a position between the two transverse pins 29, at this time, the push rod 5 has been disengaged from the bottom hole 35, the pull plate 36 has moved to the right under the action of the compression spring 38, the hook head 37 is disengaged from the groove of the pad 34, the valve rod 15 continues to move up, the lower key 13 and the cross pin 29 drive the inner sleeve 11, the outer sleeve 9 and the shutter 7 to move up together, under the cooperation of the guide rod 14 and the outer spiral groove 41, the outer sleeve 9 moves up and forms a rotary motion, the cross pin 29 drives the lower key 13 to move in the cross groove 28, the lower key 13 is disengaged from the upper port of the inner spiral groove 39, when the guide rod 14 moves to the guide groove 10, the outer sleeve 9 stops rotating, and the hand wheel 23 continues to rotate to drive the valve rod 15, the inner sleeve 11, the outer sleeve 9 and the shutter 7 to move up until the shutter 7 is completely opened. In the whole opening process, the device is easy and labor-saving.
And (3) closing process: the hand wheel 23 is rotated in the opposite direction to drive the screw sleeve 20 to rotate in the same direction, the screw sleeve 20 is connected with the conversion sleeve 19 in a threaded manner, meanwhile, the upper key 27 is arranged at the lower part of the conversion sleeve 19 to prevent the conversion sleeve 19 from rotating, the conversion sleeve 19 moves downwards to drive the valve rod 15 to move downwards, the lower key 13 is arranged at the middle part of the valve rod 15, the lower key 13 is arranged in the transverse groove 28, and the lower key 13 deviates from the upper end opening of the inner spiral groove 39, so that the inner sleeve 11, the outer sleeve 9 and the gate plate 7 are driven to move downwards together, when the lower end surface of the gate plate 7 is lower than the lowest part of the valve seat 3, the guide rod 14 enters the outer spiral groove 41, the valve rod 15, the inner sleeve 11, the outer sleeve 9 and the gate plate 7 continue to move downwards, the transverse pin 29 and the lower key 13 are driven to move in the opposite directions, when the lower end surface of the gate plate 7 contacts the sealing ring 33, the lower key 13 moves to the upper end opening of the inner spiral groove 39, the lower key 15 continues to move downwards, the lower key 13 enters the inner spiral groove 39, the valve rod 15 rotates and moves downwards, the valve rod 15 completely closes the straight guide valve rod 35, and the liquid inlet hole 35 and completely closes the straight outlet hole 35. In the whole closing process, the device is easy and labor-saving.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides an interior guide's formula gate valve, includes valve body, disk seat, flashboard, valve rod and valve gap, the valve body lower part is equipped with medium channel, and valve body upper portion is equipped with the cavity, disk seat and flashboard sealing fit are in medium channel, the valve gap lid is located the valve body upper end, its characterized in that: the valve rod can be lifted and rotated to penetrate through the valve cover, the upper section of the valve rod is connected with a driving mechanism, an inner sleeve and an outer sleeve are sleeved on the lower section of the valve rod, the lower end of the inner sleeve is connected with the flashboard, a vertical groove, an inner spiral groove and a transverse groove are arranged on the inner circle of the inner sleeve, the transverse groove is communicated with the upper end of the inner spiral groove, the lower end of the inner spiral groove is communicated with the upper end of the vertical groove, a lower key arranged in the inner spiral groove is arranged on the corresponding valve rod in a matching mode, the outer sleeve is positioned on the outer side of the inner sleeve, a guide groove and an outer spiral groove are arranged on the outer circle of the outer sleeve, the lower end of the outer spiral groove is communicated with the upper end of the guide groove, a guide rod arranged in the guide groove is arranged on the corresponding valve body in a matching mode, two transverse pins are arranged on the outer sleeve in a penetrating mode, the two transverse pins extend into the transverse grooves, and the two transverse pins have intervals corresponding to the upper ports of the inner spiral groove; a pressure relief channel is arranged in the flashboard, a liquid inlet hole communicated with the lower part of the pressure relief channel is arranged on the left side of the flashboard, a liquid outlet hole communicated with the upper part of the pressure relief channel is arranged on the right side of the flashboard, the pressure relief channel is provided with a guide valve flap, the guide valve flap can move up and down and is arranged in the flashboard, and the upper end of the guide valve flap can rotate in the circumferential direction and is connected to the lower end of the valve rod in an axial transmission manner; the driving mechanism comprises a hand wheel, a support and a conversion sleeve, the support is installed at the upper end of the valve cover, the conversion sleeve can rotate in the circumferential direction and is axially sleeved on the upper section of the valve rod in a transmission mode, an upper key is arranged at the lower portion of the conversion sleeve, an upper key groove is formed in the corresponding support and is matched with the upper key groove, a threaded sleeve is rotatably arranged at the upper end of the support, a threaded connecting sleeve of the threaded sleeve is arranged on the conversion sleeve, and the threaded sleeve is in transmission connection with the hand wheel.
2. The internal pilot operated gate valve of claim 1, wherein: the pressure relief channel is also internally provided with a pulling plate capable of moving left and right, the pulling plate is provided with a compression spring, the pulling plate is positioned below the liquid inlet hole, the lower end of the pulling plate is provided with a hook head, the hook head extends out of the bottom hole of the gate plate, a corresponding valve body is internally provided with a cushion block, the cushion block is provided with a groove, the groove is in limit fit with the hook head, the upper end face of the cushion block is provided with a sealing ring, and the sealing ring is in sealing fit with the lower end face of the gate plate; the lower end of the guide valve clack is connected with a push rod, and the push rod is in transmission fit with the pull plate.
3. The internal pilot gate valve of claim 2, wherein: the upper section of the pulling plate is provided with a driving inclined plane which is in transmission fit with the lower end of the push rod.
4. The internal pilot gate valve of claim 1, wherein: the upper end of the pilot valve flap is provided with an inverted T-shaped groove, the lower end of the valve rod is provided with an inverted T-shaped head, and the inverted T-shaped head can rotate in the circumferential direction and is axially limited and arranged in the T-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110743360.0A CN113324095B (en) | 2021-07-01 | 2021-07-01 | Internal pilot type gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110743360.0A CN113324095B (en) | 2021-07-01 | 2021-07-01 | Internal pilot type gate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113324095A CN113324095A (en) | 2021-08-31 |
| CN113324095B true CN113324095B (en) | 2023-02-17 |
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ID=77425409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110743360.0A Active CN113324095B (en) | 2021-07-01 | 2021-07-01 | Internal pilot type gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113324095B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3662778A (en) * | 1971-01-05 | 1972-05-16 | Mueller Co | Gate valve structure |
| CN101029690A (en) * | 2007-04-25 | 2007-09-05 | 钟世全 | PE electric-melting pipeline valve |
| CN103174856A (en) * | 2013-03-21 | 2013-06-26 | 迁安市科技发展促进中心 | Smoke flow control valve |
| CN203363241U (en) * | 2013-07-04 | 2013-12-25 | 洪永忠 | Brake valve with moving gate |
| CN207777664U (en) * | 2018-01-26 | 2018-08-28 | 山西隆达御威流体控制设备有限公司 | A kind of Outside screw stem rising through handwheel type gate valve |
| JP2018159467A (en) * | 2017-01-16 | 2018-10-11 | バット ホールディング アーゲー | Seal of vacuum valve and production method therefor |
-
2021
- 2021-07-01 CN CN202110743360.0A patent/CN113324095B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3662778A (en) * | 1971-01-05 | 1972-05-16 | Mueller Co | Gate valve structure |
| CN101029690A (en) * | 2007-04-25 | 2007-09-05 | 钟世全 | PE electric-melting pipeline valve |
| CN103174856A (en) * | 2013-03-21 | 2013-06-26 | 迁安市科技发展促进中心 | Smoke flow control valve |
| CN203363241U (en) * | 2013-07-04 | 2013-12-25 | 洪永忠 | Brake valve with moving gate |
| JP2018159467A (en) * | 2017-01-16 | 2018-10-11 | バット ホールディング アーゲー | Seal of vacuum valve and production method therefor |
| CN207777664U (en) * | 2018-01-26 | 2018-08-28 | 山西隆达御威流体控制设备有限公司 | A kind of Outside screw stem rising through handwheel type gate valve |
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| Publication number | Publication date |
|---|---|
| CN113324095A (en) | 2021-08-31 |
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Effective date of registration: 20230117 Address after: 253500 east of Yingbin street and north of Huifeng Road, economic development zone, Lingcheng District, De Zhou City, Shandong Province Applicant after: Guotaitong Energy Equipment Group Co.,Ltd. Address before: 325002 building 3, teachers college dormitory, xiawu community, Hongdian street, Lucheng District, Wenzhou City, Zhejiang Province Applicant before: Zheng Ziye |
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