CN114517851A - Linkage type hydraulic control fire valve - Google Patents

Linkage type hydraulic control fire valve Download PDF

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Publication number
CN114517851A
CN114517851A CN202210061675.1A CN202210061675A CN114517851A CN 114517851 A CN114517851 A CN 114517851A CN 202210061675 A CN202210061675 A CN 202210061675A CN 114517851 A CN114517851 A CN 114517851A
Authority
CN
China
Prior art keywords
control
pipe
valve
fire
lateral
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210061675.1A
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Chinese (zh)
Inventor
夏建东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Hongdi Purification Engineering Co ltd
Original Assignee
Jiangsu Hongdi Purification Engineering Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Hongdi Purification Engineering Co ltd filed Critical Jiangsu Hongdi Purification Engineering Co ltd
Priority to CN202210061675.1A priority Critical patent/CN114517851A/en
Publication of CN114517851A publication Critical patent/CN114517851A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/36Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • F16K17/38Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C31/00Delivery of fire-extinguishing material
    • A62C31/005Delivery of fire-extinguishing material using nozzles
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C37/00Control of fire-fighting equipment
    • A62C37/36Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
    • A62C37/38Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device by both sensor and actuator, e.g. valve, being in the danger zone

Abstract

The invention relates to the technical field of fire control, in particular to a linkage type hydraulic control fire valve which comprises a main valve shell, an electric control reversing valve, a temperature sensing control switch, a pressure sensing control switch, a fire-fighting spray header and an external liquid conveying pipe, wherein the main valve shell is arranged at the position of an air port of a pipeline, and the external liquid conveying pipe is used for connecting a fire-fighting high-pressure water pipe. According to the linkage type hydraulic control fire valve, the water pressure in a fire pipeline is controlled to control the valve through the electric control reversing valve, so that the air port is controlled to be closed, a driving mechanism is not needed, the mechanical mechanism is adopted for driving, the durability and the safety are greatly improved, meanwhile, the cost is low, the application range is wider, and the popularization and the promotion are facilitated; the hydraulic control devices controlled by the water pressure in the external infusion tube are arranged at the two ends of the outer side surface of the transverse guide tube, and the opening, closing and resetting are automatically controlled through the temperature sensing control switch and the pressure sensing control switch, so that the manual control operation is not needed, the operation is simple and convenient, and the induction is sensitive.

Description

Linkage type hydraulic control fire valve
Technical Field
The invention relates to the technical field of fire prevention control, in particular to a linkage type hydraulic control fire prevention valve.
Background
The fire valve is a normally closed valve, is usually opened by a control center through electric or manual operation, is automatically closed at 280 ℃, and is manually reset. It has the following functions: when the temperature of the flue gas reaches 280 ℃, people are basically evacuated, the actual meaning of the flue gas discharge is not realized, and the valve is automatically closed when the fire is brought in the flue gas, so that the fire is prevented from spreading. The smoke exhaust port of the system can also be a normally closed fireproof smoke exhaust port, and a smoke exhaust fireproof valve on a branch pipe is omitted.
The fire damper on the traditional market is simple in structure and single in function, needs to be controlled by means of an independent driving unit, cannot be automatically adjusted and controlled according to the actual condition of an air port, and accordingly the application range of the fire damper is single, and operation is inconvenient.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems existing in the background art, an improved fire damper with linkage type hydraulic control is provided, and the problems that the traditional fire damper on the market is simple in structure and relatively single in function, needs to be controlled by an independent driving unit, cannot be automatically adjusted and controlled according to the actual condition of an air port, is relatively single in application range and is inconvenient to operate are solved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a linkage type hydraulic control fire valve comprises a main valve shell arranged at the position of a pipeline air port, an electric control reversing valve, a temperature sensing control switch, a pressure sensing control switch, a fire-fighting spray header and an external liquid conveying pipe used for connecting a fire-fighting high-pressure water pipe, the lower surface of the main valve shell is provided with a plurality of upward convex integrated structure internal assembly pipes, the internal assembly pipes are movably inserted with a bottom adjusting pipe with an opening at the lower end, the outer side arc surface of the inner assembly pipe is provided with a lateral linkage control hole, the outer side arc surface of the bottom adjusting pipe is provided with an annular control tooth socket corresponding to the lateral linkage control hole, a transverse guide pipe with a built-in transverse adjusting rod is fixedly connected inside the main valve shell and positioned at the outer side of the inner assembling pipe close to the lateral linkage control hole, the outer side surface of the transverse guide pipe is fixedly connected with a hydraulic control device controlled by the internal water pressure of the external infusion pipe.
The hydraulic control device comprises lateral control cylinders fixed at two ends of the outer side face of the transverse guide pipe, a hydraulic cylinder body inserted in the lateral control cylinders, a hydraulic piston rod inserted in the hydraulic cylinder body, a linkage extrusion block coaxially fixed at the top end of the hydraulic piston rod and an external pressurization communicating pipe for fixedly communicating the electronic control reversing valve.
The main valve shell inner top surface on fixed be equipped with the top connection sealing valve body that is used for installing automatically controlled switching-over valve, the top connect on the sealing valve body lateral surface fixedly connected with be used for connecting the outside connection catheter of outside transfer line and outside pressure boost communicating pipe.
The outer side arc surface of the transverse adjusting rod is provided with a strip-shaped driving tooth groove, the annular control tooth groove and the strip-shaped driving tooth groove are in meshing transmission through a linkage gear, and the outer side surface of the transverse adjusting rod is provided with a strip-shaped guide extrusion control groove corresponding to the position of the linkage extrusion block.
And a lateral assembly blind hole for fixedly connecting a pressure sensing control switch is formed in the inner wall of the end, close to the linkage extrusion block, of the lateral control cylinder.
The lateral control cylinder is characterized in that the inner wall of the left side of the lateral control cylinder is positioned at the lower end of the pressure sensing control switch and is provided with a lateral extrusion control blind hole internally provided with an elastic extrusion control block, and the left side of the lower surface of the lateral control cylinder is fixedly connected with a tee joint bottom communicating pipe.
The lower surface of the main valve shell is provided with a strip-shaped mounting groove, a transverse drain pipe communicated with a tee joint bottom communicating pipe is fixedly clamped inside the strip-shaped mounting groove, and the lower end of the transverse drain pipe is provided with a plurality of bottom inner screw holes for fixing the fire sprinkler head through threads.
The bottom communicating pipe of the tee joint is respectively and fixedly communicated with the water outlet of the electric control reversing valve, the lateral extrusion control blind hole and the transverse drain pipe, and an internal sealing piston which is regulated and controlled by the elastic extrusion control block is inserted into the bottom communicating pipe of the tee joint.
And an external fixed frame for mounting a temperature sensing control switch is fixedly connected to the outer side surface of the main valve shell.
The outer side surface of the bottom adjusting pipe is provided with an outer side assembling screw hole internally provided with a lateral locking bolt, and the outer side surface of the inner assembling pipe is provided with a lateral control port internally provided with a detachable closing plate.
The invention has the beneficial effects that:
(1) the linkage type hydraulic control fire valve controls the water pressure in the fire pipeline to the valve through the electric control reversing valve, so that the air port is controlled to be closed, a driving mechanism is not needed, the valve is driven by a mechanical mechanism, the durability and the safety are greatly improved, and meanwhile, the linkage type hydraulic control fire valve is low in cost, wider in application range and convenient to popularize and promote;
(2) the hydraulic control devices controlled by the water pressure in the external infusion tube are arranged at the two ends of the outer side surface of the transverse guide tube, and the opening, closing and resetting are automatically controlled by the temperature sensing control switch and the pressure sensing control switch without manual control operation, so that the transverse guide tube is simple and convenient to operate and sensitive in induction;
(3) the bottom adjusting pipe movably inserted in the assembling pipe in the lower surface of the main valve shell is connected with the sealing blade in the air port, so that the assembly is convenient, and the internal sealing performance of the main valve shell can be effectively improved;
(4) through the horizontal drain pipe of putting the fire sprinkler head at bottom of main valve shell lower extreme installation, be connected outside transfer line and fire sprinkler head when closed sealed, adopt the mode that initiatively sprays to promote thermal-insulated and fire extinguishing capacity, the functionality promotes greatly.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is an internal sectional view of the hydraulic control apparatus of the present invention.
Fig. 3 is a side sectional view of the hydraulic control apparatus of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
The linkage type hydraulic control fire valve shown in figures 1, 2 and 3 comprises a main valve shell 1 arranged at the position of a pipeline air port and an electric control reversing valve 2, temperature sensing control switch 3, pressure sensing control switch 4, fire sprinkler head 5 and the outside transfer line 6 that is used for connecting the fire control high pressure water pipe, main valve shell 1 lower surface has a plurality of bellied integrative structure internal assembly pipes 7 that make progress, the inside activity of internal assembly pipe 7 is pegged graft there is lower extreme open-ended bottom control pipe 8, lateral direction linkage control hole 9 has been seted up on the 7 outside arcwall faces of internal assembly pipe, 8 outside arcwall faces of bottom control pipe have annular control tooth's socket 10 corresponding to lateral direction linkage control hole 9 positions, main valve shell 1 is inside to be located internal assembly pipe 7 and is close to lateral direction linkage control hole 9 outside fixedly connected with the horizontal stand pipe 12 of built-in horizontal regulation pole 11 of fixedly connected with, horizontal stand pipe 12 lateral surface fixedly connected with by the hydraulic control device of the inside water pressure control of outside transfer line 6.
Wherein automatically controlled switching-over valve 2, temperature sensing control switch 3, pressure sensing control switch 4 and fire sprinkler head 5 are prior art, for direct purchase on the market obtains, and automatically controlled switching-over valve is the tee bend switching-over valve, and a connection outside transfer line 6, other two connect hydraulic control device, then possess and rotate closed and open the function.
Further, for the purpose of matching control, the hydraulic control device comprises a lateral control cylinder 13 fixed at two ends of the outer side surface of the transverse guide pipe 12, a hydraulic cylinder body 14 inserted in the lateral control cylinder 13, a hydraulic piston rod 15 inserted in the hydraulic cylinder body 14, a linkage extrusion block 16 coaxially fixed at the top end of the hydraulic piston rod 15 and an external pressurization communicating pipe 17 for fixedly communicating the electronic control reversing valve 2.
Further, in order to be matched, connected and sealed, a top connecting and sealing valve body 18 for installing the electric control reversing valve 3 is fixedly assembled on the inner top surface of the main valve shell 1, and an outer side connecting liquid guide pipe 19 for connecting an external liquid conveying pipe 6 and an external pressurizing communicating pipe 17 is fixedly connected to the outer side surface of the top connecting and sealing valve body 18.
Furthermore, in order to control the rotation of the bottom adjusting pipe 8 through translation, a strip-shaped driving tooth groove 20 is formed in the arc-shaped surface of the outer side of the transverse adjusting rod 11, the annular control tooth groove 10 and the strip-shaped driving tooth groove 20 are in meshing transmission through a linkage gear 21, and a strip-shaped guiding extrusion control groove 22 is formed in the outer side surface of the transverse adjusting rod 11 corresponding to the position of the linkage extrusion block 16.
Further, for the matched installation, a lateral assembly blind hole for fixedly connecting the pressure sensing control switch 4 is formed in the inner wall of the end, close to the linkage extrusion block 16, of the lateral control cylinder 13.
Further, in order to match with lateral linkage adjustment, a lateral extrusion control blind hole 24 with a built-in elastic extrusion control block 23 is formed in the inner wall of the left side of the lateral control cylinder 13 and located at the lower end of the pressure sensing control switch 4, and a three-way bottom communicating pipe 25 is fixedly connected to the left side of the lower surface of the lateral control cylinder 13.
The elastic extrusion control block 23 is composed of an extrusion block and a return spring connected to the inner side surface of the extrusion block.
Further, in order to match the bottom spraying, the active fire extinguishing capacity is improved, the lower surface of the main valve shell 1 is provided with a strip-shaped mounting groove, the inside of the strip-shaped mounting groove is clamped and fixed with a transverse drain pipe 26 communicated with a tee joint bottom communicating pipe 25, and the lower end of the transverse drain pipe 26 is provided with a plurality of bottom inner screw holes for fixing the fire sprinkler head 5 through threads.
Further, in order to match with the automatic flow direction adjustment during extrusion, the three-way bottom communicating pipe 25 is respectively and fixedly communicated with the water outlet of the electric control reversing valve 2, the lateral extrusion control blind hole 24 and the transverse drain pipe 26, and an internal sealing piston 27 which is adjusted and controlled by the elastic extrusion control block 23 is inserted into the three-way bottom communicating pipe 25.
Further, in order to cooperate with real-time monitoring of the temperature inside the tuyere, an external fixing frame 28 for installing the temperature sensing control switch 3 is fixedly connected to the outer side surface of the main valve housing 1.
When the temperature sensing control switch 3 detects high temperature and exceeds 280 ℃, the electronic control reversing valve 2 is opened, then the external liquid conveying pipe 6 guides high-pressure water into the hydraulic cylinder 14 at the left end of the outer side surface of the transverse guide pipe 12, the hydraulic cylinder 14 drives the hydraulic piston rod 15 inside to extrude and translate leftwards, the linkage extrusion block 16 at the top end of the hydraulic piston rod 15 drives the transverse adjusting rod 11 to translate leftwards and control the bottom adjusting pipe 8 to rotate clockwise, the air port blades arranged inside the bottom adjusting pipe 8 turn over to close the air port, when the transverse adjusting rod 11 translates leftwards to a position close to the leftmost inner wall, the elastic extrusion control block 23 is extruded, the elastic extrusion control block 23 drives the internal sealing piston 27 to translate leftwards, and at the moment, the external pressurizing communicating pipe 17 is communicated with the opening inside the lateral extrusion control blind hole 24 and communicated with the inside of the transverse water discharging pipe 26 to start to supply water to the fire sprinkler head 5, then the transverse adjusting rod 11 continues to translate leftwards until the transverse adjusting rod is extruded to the pressure sensing control switch 4, and the electric control reversing valve 2 starts to be controlled to reset, so that the external infusion tube 6 is disconnected with the external pressurizing communicating tube 17; similarly, when the temperature drops to the normal temperature, the electronic control reversing valve 2 is opened, then the external infusion tube 6 leads the high-pressure water into the hydraulic cylinder 14 at the right end of the outer side surface of the transverse guide tube 12, and the reverse operation is started, and the principle is the same as that of the prior art.
Furthermore, in order to facilitate the control of the assembling and disassembling, an outer side assembling screw hole with a built-in side locking bolt 29 is formed on the outer side surface of the bottom adjusting pipe 8, and a side control port with a built-in detachable closing plate 30 is formed on the outer side surface of the inner assembling pipe 7.
The detachable closing plate 30 is fixed and closed with the lateral control port through fixing bolts on two sides, and the tightness of the lateral locking bolt 29 can be adjusted by a screwdriver after the lateral control port is opened, so that locking and separation control of a mounting shaft inside the bottom adjusting pipe 8 is improved.
According to the linkage type hydraulic control fire-proof valve, the water pressure in the fire-fighting pipeline is controlled to the valve through the electric control reversing valve 2, so that the air port is controlled to be closed, a driving mechanism is not needed, the valve is driven by a mechanical mechanism, the durability and the safety are greatly improved, meanwhile, the cost is low, the application range is wider, and the valve is convenient to popularize; the hydraulic control devices controlled by the water pressure in the external infusion tube 6 are arranged at the two ends of the outer side surface of the transverse guide tube 12, and the opening, closing and resetting are automatically controlled by the temperature sensing control switch 3 and the pressure sensing control switch 4, so that the manual control operation is not needed, the operation is simple and convenient, and the induction is sensitive; the bottom adjusting pipe 8 movably inserted in the assembling pipe 7 in the lower surface of the main valve shell 1 is connected with the sealing blade in the air port, so that the assembly is convenient, and the internal sealing performance of the main valve shell can be effectively improved; through the horizontal drain pipe 26 of putting fire sprinkler head 5 at the bottom of main valve housing 1 lower extreme installation, be connected outside transfer line 6 with fire sprinkler head 5 when closed sealed, adopt the mode of initiatively spraying to promote thermal-insulated and fire extinguishing ability, the functionality promotes greatly.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. The utility model provides a have coordinated type liquid accuse fire prevention valve, is including installing main valve housing (1), automatically controlled switching-over valve (2), temperature sensing control switch (3), pressure sensing control switch (4), fire sprinkler head (5) and outside transfer line (6) that are used for connecting fire control high pressure water pipe in pipeline wind gap position, characterized by: main valve housing (1) lower surface a plurality of bellied integrative structure inside assembly pipe (7) that make progress have, inside activity grafting of inside assembly pipe (7) have lower extreme open-ended bottom control pipe (8), inside assembly pipe (7) outside arcwall on seted up side direction linkage control hole (9), bottom control pipe (8) outside arcwall position that corresponds side direction linkage control hole has annular control tooth's socket (10), main valve housing (1) inside be located inside assembly pipe (7) and be close to horizontal stand pipe (12) of side direction linkage control hole (9) outside fixedly connected with built-in horizontal regulation pole (11), horizontal stand pipe (12) lateral surface fixedly connected with by the hydraulic control device of the inside water pressure control of outside transfer line (6).
2. The linked hydraulic control fire valve as claimed in claim 1, wherein: the hydraulic control device comprises lateral control cylinders (13) fixed at two ends of the outer side surface of the transverse guide pipe (12), a hydraulic cylinder body (14) inserted in the lateral control cylinders (13), a hydraulic piston rod (15) inserted in the hydraulic cylinder body (14), a linkage extrusion block (16) coaxially fixed at the top end of the hydraulic piston rod (15) and an external pressurization communicating pipe (17) for fixedly communicating the electronic control reversing valve (2).
3. The linked hydraulic control fire valve as claimed in claim 1, wherein: the main valve shell (1) on the top surface fixed be equipped with the top connection sealing valve body (18) that is used for installing automatically controlled switching-over valve (2), the top connect sealing valve body (18) on the lateral surface fixedly connected with be used for connecting outside transfer line (6) and outside pressurization communicating pipe (17) outside connect catheter (19).
4. The linked hydraulic control fire valve as claimed in claim 2, wherein: the bar-shaped driving tooth grooves (20) are formed in the arc-shaped surface of the outer side of the transverse adjusting rod (11), the annular control tooth grooves (10) and the bar-shaped driving tooth grooves (20) are in meshing transmission through a linkage gear (21), and the bar-shaped guiding extrusion control grooves (22) are formed in the position, corresponding to the linkage extrusion block (16), of the outer side surface of the transverse adjusting rod (11).
5. The linked hydraulic control fire valve as claimed in claim 2, wherein: and a lateral assembly blind hole for fixedly connecting the pressure sensing control switch (4) is formed in the inner wall of the end, close to the linkage extrusion block (16), of the lateral control cylinder (13).
6. The linkage type hydraulic control fire prevention valve as claimed in claim 5, wherein: the lateral control device is characterized in that the inner wall of the left side of the lateral control cylinder (13) is positioned at the lower end of the pressure sensing control switch (4) and is provided with a lateral extrusion control blind hole (24) internally provided with an elastic extrusion control block (23), and the left side of the lower surface of the lateral control cylinder (13) is fixedly connected with a tee bottom communicating pipe (25).
7. The linked hydraulic control fire valve as claimed in claim 6, wherein: main valve housing (1) lower surface seted up the bar mounting groove, the inside joint of bar mounting groove be fixed with horizontal drain pipe (26) that are linked together with tee bend bottom communicating pipe (25), horizontal drain pipe (26) lower extreme seted up a plurality of bottom inner screw holes that are used for thread tightening fire sprinkler head (5).
8. The linked hydraulic control fire valve as claimed in claim 7, wherein: the three-way bottom communicating pipe (25) is respectively and fixedly communicated with a water outlet of the electric control reversing valve (2), the lateral extrusion control blind hole (24) and the transverse drain pipe (26), and an internal sealing piston (27) which is adjusted and controlled by the elastic extrusion control block (23) is inserted into the three-way bottom communicating pipe (25).
9. The linked hydraulic control fire valve as claimed in claim 1, wherein: the outer side surface of the main valve shell (1) is fixedly connected with an external fixed frame (28) used for mounting a temperature sensing control switch (3).
10. The linked hydraulic control fire valve as claimed in claim 1, wherein: the outer side surface of the bottom adjusting pipe (8) is provided with an outer side assembling screw hole with a built-in side locking bolt (29), and the outer side surface of the inner assembling pipe (7) is provided with a side control port with a built-in detachable closing plate (30).
CN202210061675.1A 2022-01-19 2022-01-19 Linkage type hydraulic control fire valve Pending CN114517851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210061675.1A CN114517851A (en) 2022-01-19 2022-01-19 Linkage type hydraulic control fire valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210061675.1A CN114517851A (en) 2022-01-19 2022-01-19 Linkage type hydraulic control fire valve

Publications (1)

Publication Number Publication Date
CN114517851A true CN114517851A (en) 2022-05-20

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ID=81597009

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210061675.1A Pending CN114517851A (en) 2022-01-19 2022-01-19 Linkage type hydraulic control fire valve

Country Status (1)

Country Link
CN (1) CN114517851A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115054857A (en) * 2022-08-18 2022-09-16 江苏国荣安防装备科技有限公司 Special remote control actuating mechanism of indoor fire hydrant of intelligence
CN116336205A (en) * 2023-05-29 2023-06-27 江苏世能化工设备有限公司 Coke oven flue valve with heat exchange adjusting device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115054857A (en) * 2022-08-18 2022-09-16 江苏国荣安防装备科技有限公司 Special remote control actuating mechanism of indoor fire hydrant of intelligence
CN115054857B (en) * 2022-08-18 2023-01-06 江苏龙力神安防装备科技有限公司 Special remote control actuating mechanism of indoor fire hydrant of intelligence
CN116336205A (en) * 2023-05-29 2023-06-27 江苏世能化工设备有限公司 Coke oven flue valve with heat exchange adjusting device
CN116336205B (en) * 2023-05-29 2024-01-09 江苏世能化工设备有限公司 Coke oven flue valve with heat exchange adjusting device

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Application publication date: 20220520