CN-224214707-U - Shaftless electromagnetic emergency cut-off valve

CN224214707UCN 224214707 UCN224214707 UCN 224214707UCN-224214707-U

Abstract

The application relates to the technical field of shut-off valves, in particular to a shaftless electromagnetic emergency shut-off valve which comprises a valve body, wherein the valve body comprises a pipeline section and a valve body connecting section, the pipeline section is arranged in the middle of the pipeline section, two ends of the pipeline section are mutually communicated, a lifting shell is fixedly connected to the upper part of the valve body connecting section, a lifting cavity is formed in the lifting shell, an electromagnet, a lifting rod, a valve rod iron column and an upper magnetic part are sequentially arranged in the lifting cavity from top to bottom, a valve cover is arranged above the valve body connecting section in a sealing manner, a lower magnetic part and a sealing part are integrally formed below the valve cover, the lower magnetic part is arranged above the sealing part, a lower elastic part is abutted between the sealing part and the valve body connecting section, the lower elastic part is used for driving the sealing part to move downwards to close the pipeline section, and therefore, the structural path of a traditional pull rod penetrating through the valve cover is eliminated, and the problem of axial leakage caused by dynamic sealing abrasion between the valve cover and the pull rod is avoided.

Inventors

ZHONG ZHEN
XU BIN
CAI YU
GAN SHIJIE
HAN NING

Assignees

深圳市燃气集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250718

Claims (10)

1. A shaftless electromagnetic emergency shut-off valve for shutting off a gas delivery conduit, the shaftless electromagnetic emergency shut-off valve comprising: The valve comprises a valve body, a valve body and a valve body, wherein the valve body comprises a pipeline section and a valve body connecting section; The lifting shell is fixedly connected to the upper part of the valve body connecting section, a lifting cavity is formed in the lifting shell, and an electromagnet, a lifting rod, a valve rod iron column and an upper magnetic part are sequentially arranged in the lifting cavity from top to bottom; the valve cover is arranged above the valve body connecting section in a sealing connection manner, a lower magnetic piece and a sealing piece which are integrally formed are arranged below the valve cover, and the lower magnetic piece is arranged above the sealing piece; the lower elastic piece is abutted between the sealing piece and the valve body connecting section and is used for driving the sealing piece to move downwards to close the pipeline section; When the lifting rod is manually pressed downwards, the upper magnetic piece moves downwards along with the lifting rod and attracts the lower magnetic piece to move upwards, so that the sealing piece is driven to move upwards, and the pipeline sections are communicated; When the electromagnet is electrified, the electromagnet generates electromagnetic force to attract the valve rod iron column to move upwards and magnetically attract and fix the valve rod iron column and the upper magnetic part, the lower magnetic part is in a state of losing the magnetic attraction of the upper magnetic part, the sealing part is reset downwards under the acting force of the lower elastic part, and the communication passage of the pipeline section is cut off.
2. The shaftless electromagnetic emergency shut-off valve of claim 1, wherein, The sealing element comprises the following components which are sequentially arranged from top to bottom: A pressing piece, wherein one end of the pressing piece is in abutting connection with the lower elastic piece; The round sealing rubber sheet is arranged in a way that one end of the round sealing rubber sheet is in butt joint with the other end of the pressing sheet; And the fixing nails are used for fixing the circular sealing rubber sheet and the pressing sheet in the lower magnetic piece.
3. The shaftless electromagnetic emergency shut-off valve of claim 2, wherein, A left threaded opening and a right threaded opening are arranged in the pipeline section, and the left threaded opening and the right threaded opening are both used for being connected with a gas pipeline; The left thread opening is provided with left threads, and the right thread opening is provided with right threads; a channel area is arranged between the left thread opening and the right thread opening, a round opening is arranged at the top of the channel area, and the round opening is matched with the round sealing rubber sheet to be used for communicating or cutting off a communicating passage of the pipeline section.
4. A shaftless electromagnetic emergency shut-off valve according to claim 3, wherein, The shaftless electromagnetic emergency cut-off valve further comprises an O-shaped sealing ring, and the valve cover and the valve body connecting section are connected and sealed through the O-shaped sealing ring.
5. A shaftless electromagnetic emergency shut-off valve according to claim 3, wherein, The transverse section of the valve rod iron column is provided with a convex shape, the valve rod iron column is provided with two convex shoulders, and the convex shoulders are in butt joint with the electromagnet.
6. The shaftless electromagnetic emergency shut-off valve of claim 5, wherein, The lifting shell further comprises an upper elastic piece, wherein the upper elastic piece is abutted between the valve rod iron column and the valve cover, and the upper elastic piece is used for preventing the valve rod iron column from moving downwards under the action of gravity when the valve rod iron column is not subjected to downward acting force of the lifting rod, so that the sealing piece is driven to move upwards, and the pipeline sections are communicated.
7. The shaftless electromagnetic emergency shut-off valve of claim 5, wherein, The lifting shell further comprises a protective film clamping table, wherein the protective film clamping table is arranged on the outer side of the lifting cavity and used for preventing impurities from entering the lifting rod to be inserted into the hole of the lifting cavity.
8. The shaftless electromagnetic emergency shut-off valve of claim 6, wherein, The shaftless electromagnetic emergency shut-off valve further comprises: The protective cap is detachably connected with the lifting shell and is used for preventing the lifting rod from being pressed by mistake.
9. The shaftless electromagnetic emergency shut-off valve of claim 8, wherein, The side wall of the lifting shell is also provided with an outlet tube, and the outlet tube is used for leading out a cable of the electromagnet.
10. The shaftless electromagnetic emergency shut-off valve of claim 1, wherein, The shaftless electromagnetic emergency shut-off valve further comprises: The alarm sensor is connected with the electromagnetic iron, and is used for energizing the electromagnet after converting an alarm signal into current.

Description

Shaftless electromagnetic emergency cut-off valve Technical Field The application relates to the technical field of shut-off valves, in particular to a shaftless electromagnetic emergency shut-off valve. Background The common cut-off valve in an automatic system is generally composed of a multi-lower elastic piece pneumatic film executing mechanism or a floating piston executing mechanism and a regulating valve, and is widely used for rapidly cutting off media such as coal gas, combustion air, cold air, flue gas and the like. However, the existing hold-type electromagnetic emergency cut-off valve in industry generally adopts a structure that a pull rod penetrates through a valve cover and utilizes double-O-shaped ring dynamic seal, the double-O-shaped ring dynamic seal is easy to wear under long-term reciprocating motion, once a sealing surface is damaged, leakage can occur along the axial direction, and potential hidden hazards are brought to the safety and reliability of a system. Accordingly, the prior art has drawbacks and disadvantages, and needs to be further improved and developed. Disclosure of utility model In view of the above-mentioned shortcomings of the prior art, the present application aims to provide a shaftless electromagnetic emergency shut-off valve, which aims to solve the problem that the emergency shut-off valve in the prior art is easy to cause damage to a sealing surface and cause gas to leak axially along the emergency shut-off valve after long-term use. The application solves the technical problems by adopting the technical scheme that the shaftless electromagnetic emergency cut-off valve is used for cutting off a gas conveying pipeline and comprises the following components: The valve comprises a valve body, a valve body and a valve body, wherein the valve body comprises a pipeline section and a valve body connecting section; The lifting shell is fixedly connected to the upper part of the valve body connecting section, a lifting cavity is formed in the lifting shell, and an electromagnet, a lifting rod, a valve rod iron column and an upper magnetic part are sequentially arranged in the lifting cavity from top to bottom; the valve cover is arranged above the valve body connecting section in a sealing connection manner, a lower magnetic piece and a sealing piece which are integrally formed are arranged below the valve cover, and the lower magnetic piece is arranged above the sealing piece; the lower elastic piece is abutted between the sealing piece and the valve body connecting section and is used for driving the sealing piece to move downwards to close the pipeline section; When the lifting rod is manually pressed downwards, the upper magnetic piece moves downwards along with the lifting rod and attracts the lower magnetic piece to move upwards, so that the sealing piece is driven to move upwards, and the pipeline sections are communicated; When the electromagnet is electrified, the electromagnet generates electromagnetic force to attract the valve rod iron column to move upwards and magnetically attract and fix the valve rod iron column and the upper magnetic part, the lower magnetic part is in a state of losing the magnetic attraction of the upper magnetic part, the sealing part is reset downwards under the acting force of the lower elastic part, and the communication passage of the pipeline section is cut off. Optionally, the sealing element comprises the following components in sequence from top to bottom: A pressing piece, wherein one end of the pressing piece is in abutting connection with the lower elastic piece; The round sealing rubber sheet is arranged in a way that one end of the round sealing rubber sheet is in butt joint with the other end of the pressing sheet; And the fixing nails are used for fixing the circular sealing rubber sheet and the pressing sheet in the lower magnetic piece. Optionally, a left threaded opening and a right threaded opening are arranged in the pipeline section, and the left threaded opening and the right threaded opening are both used for being connected with a gas pipeline; The left thread opening is provided with left threads, and the right thread opening is provided with right threads; a channel area is arranged between the left thread opening and the right thread opening, a round opening is arranged at the top of the channel area, and the round opening is matched with the round sealing rubber sheet to be used for communicating or cutting off a communicating passage of the pipeline section. Optionally, the shaftless electromagnetic emergency cut-off valve further comprises an O-shaped sealing ring, and the valve cover and the valve body connecting section are connected and sealed through the O-shaped sealing ring. Optionally, the transverse section of the valve rod iron post is provided with a convex shape, and the valve rod iron post is provided with two convex shoulders which are in abutting connection with the electromagnet. Optionally