Emergency cut-off valve device for gas pipeline

Abstract

The utility model relates to the technical field of gas pipeline safety corollary equipment, and discloses an emergency cut-off valve device for a gas pipeline, which comprises a cut-off valve body and a delivery pipe, a throttle mechanism is arranged at the top of the outer wall of the cut-off valve body, and a clamping mechanism is arranged at the bottom of the outer wall of the cut-off valve body. The throttling mechanism comprises a supporting frame, a connecting column slidably connected into the supporting frame and a knife switch fixed to the bottom of the connecting column, the connecting column is driven by a spring, and the spring is controlled to be released through cooperation of a limiting pipe and a positioning pin, the clamping mechanism comprises a fixing column, a supporting column and a connecting pipe, and an inner threaded pipe and a threaded rod are installed on the supporting column; a telescopic column is slidably connected into the connecting pipe, and the threaded rod and the telescopic column are jointly connected with a rotating joint. The spring releases potential energy to drive the knife switch to instantly fall to cut off a gas path, and in cooperation with a mechanical screwing-in mode of the clamping mechanism, rapid emergency cut-off of a gas pipeline and rapid and stable connection of the valve body and a conveying pipe are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas pipeline safety matching equipment technical field especially for the emergency cut-off valve device for gas pipeline. BACKGROUND

[0002] As the main artery of city energy transmission, the safe operation of gas pipeline is directly related to public safety and property safety. In the event of pipeline rupture, serious leakage or fire during gas transmission, the gas source must be completely cut off in a very short time to block the danger source. However, the existing gas pipeline cut-off control mostly adopts manual rotary hand wheel drive or relies on power-driven actuator to control the opening and closing of the valve. This traditional driving method needs a long mechanical stroke to complete the closing action, which cannot achieve millisecond-level rapid response cut-off when facing changing danger.

[0003] The existing gas cut-off valve body and the conveying pipeline are generally fixedly connected by flange bolt butt joint or field welding. Although this traditional connection method is relatively stable in long-term fixed use, it is extremely cumbersome and time-consuming in emergency scenes such as emergency repair, temporary blockage or rapid replacement of equipment. The installation personnel need to spend a lot of time in complex field environment for hole alignment, bolt tightening or welding operation. Moreover, the existing rigid connection structure is difficult to adapt to pipelines with different diameters or angle deviations, resulting in low deployment efficiency of the entire emergency cut-off system, which is difficult to meet the urgent needs of gas pipeline network for rapid disposal and control of emergency.

[0004] Therefore, the utility model provides an emergency cut-off valve device for gas pipeline to solve the problems of the prior art. UTILITY MODEL CONTENT

[0005] In view of the problems in the prior art that the gas pipeline cut-off control mostly adopts manual rotary hand wheel drive or relies on power-driven actuator to cause millisecond-level rapid response cut-off when facing emergency, and the existing gas cut-off valve body and the conveying pipeline are generally fixedly connected by flange bolt butt joint or field welding to cause installation complexity and difficulty in adapting to different pipe diameters or angle deviations in emergency repair or temporary blockage scenes, the utility model aims to provide an emergency cut-off valve device for gas pipeline with improved structure to effectively solve the above problems.

[0006] The utility model provides an emergency cut-off valve device for gas pipeline, which comprises a cut-off valve body and a conveying pipe. The top of the cut-off valve body is provided with a throttling mechanism, and the outer wall bottom of the cut-off valve body is provided with a clamping mechanism.

[0007] The throttle mechanism includes a support frame fixedly connected to the top of the outer wall of the cut-off valve body, a connecting column slidingly connected to the middle of the inner wall of the support frame, the connecting column being capable of vertically reciprocating along the guide path provided by the support frame, a gate fixedly connected to the bottom of the outer wall of the connecting column, the gate being located in the internal flow passage of the cut-off valve body and being capable of cutting off the gas flow by moving downward with the connecting column, an upper baffle and a lower baffle being fixedly connected to the upper and lower sides of the middle of the outer wall of the connecting column respectively, a spring being installed between the top of the outer wall of the lower baffle and the top of the inner wall of the support frame, the spring continuously exerting a downward driving force on the lower baffle, the clamping mechanism including a fixed column fixedly connected to the bottom of the outer wall of the cut-off valve body, a support column and a connecting pipe being fixedly connected to the top of the outer wall of the fixed column respectively, a telescopic column slidingly connected to the middle of the inner wall of the connecting pipe, an internally-threaded pipe being installed on the top of the outer wall of the support column, a threaded rod being threadedly connected to the middle of the inner wall of the internally-threaded pipe, a rotary joint being rotatably connected to one end of the threaded rod, the rotary joint being fixedly connected to the top of the outer wall of the telescopic column, a connecting plate being fixedly connected to the other side of the outer wall of the rotary joint, a clamping plate being installed on the other end of the connecting plate, the clamping plate abutting against the outer wall of the conveying pipe.

[0008] Moreover, the cut-off valve body realizes the rapid cutting action of the gate driven by the spring potential energy through the throttle mechanism at the top, and realizes the rapid and adaptive clamping and fixing of the conveying pipe through the clamping mechanism at the bottom by the threaded rod pushing and multi-joint adjustment.

[0009] Preferably, a limiting pipe is installed on the front side of the outer wall of the support frame, a positioning pin one is slidingly connected to the middle of the inner wall of the limiting pipe, a connecting block is fixedly connected to the rear side of the outer wall of the positioning pin one, the connecting block being installed on the bottom of the outer wall of the lower baffle, the connecting block being used for abutting against the end face of the limiting pipe to support and limit the position of the lower baffle.

[0010] Preferably, a positioning pin two is slidingly connected to the middle of the inner wall of the support frame, the positioning pin two penetrating through the support frame and abutting against the outer wall of the positioning pin one, the positioning pin two being used for fixing the relative position of the positioning pin one in the limiting pipe through mechanical resistance.

[0011] Preferably, the upper baffle is located on the top of the outer wall of the support frame, the lower baffle is located in the middle of the inner wall of the support frame, the support frame limits the sliding of the connecting column within a preset range through cooperation with the upper baffle and the lower baffle, the spring is in a compressed state and exerts a downward pushing force on the lower baffle to store action energy.

[0012] Preferably, a sealing ring is installed on the outer wall of the gate, the sealing ring being interference-fitted between the gate and the internal passage of the cut-off valve body, when the connecting column slides downward, the gate drives the sealing ring to block the internal passage of the cut-off valve body and form airtight blocking.

[0013] Preferably, the outer wall of the threaded rod is fixedly connected with a rotating handle at the other end, the rotating handle is used to drive the threaded rod to rotate in the inner threaded pipe and to move axially, thereby pushing the rotating joint, the connecting plate and the clamping plate to move towards the conveying pipe.

[0014] Preferably, the outer wall of the connecting pipe is threadedly connected with a screw one, the end of the screw one penetrates through the connecting pipe and abuts against the outer wall of the telescopic column, and the screw one is used to lock the relative position of the connecting pipe and the telescopic column to fix the clamping height.

[0015] Preferably, the outer wall of the connecting plate is threadedly connected with a screw two at both sides, the screw two penetrates through the connecting plate and is connected to the clamping plate, and the screw two is used to realize quick disassembly and assembly of the clamping plate on the connecting plate, so as to facilitate replacement or maintenance.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model discloses a spring energy storage drive connecting column and a gate assembly are arranged on the top of the cut-off valve body, and a trigger locking mechanism composed of a limiting pipe and a positioning pin is arranged, so that the problem that the existing gas valve is closed by manual rotation and the emergency cutting response speed is slow is solved, the huge potential energy released by the spring is utilized to drive the gate to fall instantaneously and cut off the gas path after the locking is released, the effect of realizing rapid cutting and significantly improving the safety of the gas pipeline is achieved.

[0018] 2. The utility model discloses a clamping mechanism including a telescopic column, a rotating joint and a threaded drive assembly is arranged on the bottom of the cut-off valve body, so that the problem that the existing cutting device and the conveying pipe are connected, disassembled and assembled complicatedly and are difficult to adapt to different pipe diameters or installation angles is solved, the effect that the clamping height and angle can be flexibly adjusted, the valve body is quickly and stably fixed to the outer wall of the conveying pipe by mechanical rotation, the on-site installation process is simplified and the post-maintenance disassembly is facilitated is achieved.

[0019] 3. The utility model discloses a sealing ring is installed on the outer wall of the gate and cooperates with the inner wall of the cut-off valve body, so that the problem that the existing emergency cutting device is prone to gas leakage due to the inaccuracy of the sealing surface after rapid operation is solved, the effect that the gas tightness is ensured by the interference fit of the sealing ring when the gate falls and cuts off the flow passage, thereby effectively preventing the expansion of the gas leakage accident is achieved. ACCURATE DRAWINGS

[0020] Figure 1 The utility model discloses an emergency cut-off valve device for a gas pipeline;

[0021] Figure 2 The utility model discloses an emergency cut-off valve device for a gas pipeline;

[0022] Figure 3The utility model provides a local structure perspective drawing of emergency cut-off valve device for gas pipeline,

[0023] Figure 4 The utility model provides a local structure front view of emergency cut-off valve device for gas pipeline,

[0024] Figure 5 The utility model provides a local structure schematic view of emergency cut-off valve device for gas pipeline.

[0025] Legend:

[0026] 1, cut-off valve body;2, throttling mechanism;201, support frame;202, connecting column;203, upper baffle;204, lower baffle;205, spring;206, connecting block;207, positioning pin one;208, limiting pipe;209, positioning pin two;210, gate;211, sealing ring;3, clamping mechanism;301, fixed column;302, connecting pipe;303, telescopic column;304, screw one;305, rotary joint;306, connecting plate;307, screw two;308, clamping plate;309, support column;310, internal thread pipe;311, threaded rod;312, rotary handle;4, delivery pipe. DETAILED DESCRIPTION

[0027] In order to make the utility model purposes, technical scheme and advantages more clearly, the following will combine the drawings in the utility model embodiment, and the technical scheme in the utility model embodiment is clearly and completely described. Obviously, the described embodiment is only a part of the utility model embodiment, not all embodiments. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of the utility model protection.

[0028] Embodiment:

[0029] Please refer to Figures 1 to 5 The utility model embodiment provides emergency cut-off valve device for gas pipeline, and aims at solving the problems of slow response speed of gas pipeline cut-off device in emergency, and complicated connection and disconnection between valve body and delivery pipe 4 and inconvenient sealing and fixing.

[0030] Please refer to Figure 1 And Figure 2The utility model provides an emergency cut-off valve device for gas pipeline, which comprises a cut-off valve body 1 and a conveying pipe 4, the cut-off valve body 1 is used for connecting a gas pipeline and providing a gas flow passage as a main structure of the emergency cut-off valve device for gas pipeline, the conveying pipe 4 is used for conveying a gas medium, a throttling mechanism 2 is arranged on the top of the outer wall of the cut-off valve body 1, the throttling mechanism 2 is used for quickly blocking the passage in the cut-off valve body 1 in an emergency state, a clamping mechanism 3 is arranged on the bottom of the outer wall of the cut-off valve body 1, the clamping mechanism 3 is used for stably and sealingly fixing the cut-off valve body 1 on the conveying pipe 4, the throttling mechanism 2 comprises a support frame 201 fixedly connected to the top of the outer wall of the cut-off valve body 1, the support frame 201 plays a main supporting and guiding role, a connecting column 202 is slidably connected to the middle of the inner wall of the support frame 201, the connecting column 202 can reciprocate in the vertical direction to transmit a mechanical action, a shutter 210 is fixedly connected to the bottom of the outer wall of the connecting column 202, the shutter 210 is located in the internal flow passage of the cut-off valve body 1, an upper baffle 203 and a lower baffle 204 are respectively fixedly connected to the upper and lower sides of the middle of the outer wall of the connecting column 202, the upper baffle 203 is located on the top of the outer wall of the support frame 201, the lower baffle 204 is located on the middle of the inner wall of the support frame 201, the sliding stroke of the connecting column 202 is limited by the positions of the upper baffle 203 and the lower baffle 204 relative to the support frame 201, a spring 205 is installed between the top of the outer wall of the lower baffle 204 and the top of the inner wall of the support frame 201, the spring 205 is sleeved on the outer periphery of the connecting column 202 and is in a compressed energy storage state, the spring 205 continuously applies a downward thrust to the lower baffle 204, a sealing ring 211 is installed on the outer wall of the shutter 210, the sealing ring 211 is in interference fit between the shutter 210 and the inner wall of the cut-off valve body 1, when the connecting column 202 slides downward under the action of force, the shutter 210 drives the sealing ring 211 to tightly adhere to the inner wall of the flow passage, so that the internal passage of the cut-off valve body 1 is blocked.

[0031] Please refer to Figure 3 and Figure 5The outer wall front side of the support frame 201 is provided with a limiting pipe 208, which is a hollow tubular structure and extends horizontally forward. A positioning pin one 207 is slidably connected to the middle part of the inner wall of the limiting pipe 208 and can slide in the front-rear direction within the limiting pipe 208. The outer wall rear side of the positioning pin one 207 is fixedly connected with a connecting block 206, which is installed on the outer wall bottom of the lower baffle plate 204. The rigid connection of the connecting block 206 and the positioning pin one 207 enables the connecting block 206 to move synchronously with the positioning pin one 207. In the locked state, the connecting block 206 abuts against the rear end face of the limiting pipe 208, thereby supporting the lower baffle plate 204 to stay at the middle part of the inner wall of the support frame 201, and maintaining the spring 205 in the compressed energy storage state. When the positioning pin one 207 moves backward and the connecting block 206 slides into the middle part of the inner wall of the limiting pipe 208, the connecting block 206 loses the vertical supporting effect on the lower baffle plate 204, and the lower baffle plate 204 can be driven downward by the spring 205. At the same time, a positioning pin two 209 is slidably connected to the middle part of the inner wall of the support frame 201 and abuts against the outer wall of the positioning pin one 207. The positioning pin two 209 penetrates through the side wall of the support frame 201 and is used to limit the relative position of the positioning pin one 207 within the limiting pipe 208 by friction or clamping, so as to prevent the unexpected displacement of the positioning pin one 207 due to vibration and other accidental factors, thereby ensuring the safety and stability of the device in the non-emergency state.

[0032] As a preferred embodiment, the outer wall bottom of the cutoff valve body 1 is provided with a clamping mechanism 3. The core load-bearing component of the clamping mechanism 3 is a fixed column 301 fixedly connected to the outer wall bottom of the cutoff valve body 1. The fixed column 301 is a rigid support structure. The outer wall top front and rear sides of the fixed column 301 are fixedly connected with a support column 309 and a connecting pipe 302, respectively. The support column 309 is located on one side of the fixed column 301 and extends vertically upward. The outer wall top of the support column 309 is horizontally provided with an internally threaded pipe 310. The internally threaded pipe 310 has a through internally threaded hole in the inside. The internally threaded pipe 310 is threadedly connected with a threaded rod 311 at the middle part of the inner wall. The threaded rod 311 and the internally threaded pipe 310 form a screw-nut pair transmission structure. The other end of the threaded rod 311 is fixedly connected with a rotating handle 312. The rotating handle 312 can drive the threaded rod 311 to rotate within the internally threaded pipe 310 and generate an axial feeding motion. One end of the threaded rod 311 is rotatably connected with a rotating joint 305, so that when the threaded rod 311 rotates and advances, it can push the rotating joint 305 to move linearly without rotating the rotating joint 305.

[0033] As another preferred embodiment, the connecting pipe 302 is located on the other side of the fixed column 301 and is vertically arranged, the inner wall of the connecting pipe 302 is slidably connected with the telescopic column 303 in the middle, the telescopic column 303 can slide up and down in the connecting pipe 302 to adjust the clamping height, the outer wall of the connecting pipe 302 is threadedly connected with the screw one 304, the end of the screw one 304 penetrates through the side wall of the connecting pipe 302 and abuts against the outer wall of the telescopic column 303, the height position of the telescopic column 303 relative to the connecting pipe 302 can be locked by screwing the screw one 304, the outer wall of the telescopic column 303 is fixedly connected with the rotating joint 305 at the top, the rotating joint 305 here is the same component or linkage component as the threaded rod 311, the other side of the outer wall of the rotating joint 305 is fixedly connected with the connecting plate 306, the connecting plate 306 can be multi-angle rotated around the axis of the rotating joint 305, the other end of the connecting plate 306 is installed with the clamping plate 308, the outer wall of the connecting plate 306 is threadedly connected with the screw two 307 on both sides, the screw two 307 penetrates through the connecting plate 306 and is connected to the clamping plate 308, the screw two 307 is used for detachably fixing the clamping plate 308 on the connecting plate 306, when the threaded rod 311 drives the rotating joint 305 to move, the connecting plate 306 and the clamping plate 308 are driven to move towards the conveying pipe 4 and finally abut against the outer wall of the conveying pipe 4, so as to realize the clamping and fixing of the conveying pipe 4 in cooperation with the fixed structure on the other side of the shut-off valve body 1 or the other set of clamping assemblies symmetrically arranged.

[0034] Working principle: when the gas pipeline system detects an abnormal condition that needs to be shut off urgently, the operator or the automatic control system first releases the locking of the positioning pin two 209 to the positioning pin one 207, and then drives the positioning pin one 207 to slide backward in the limiting pipe 208, when the positioning pin one 207 drives the connecting block 206 to move to the middle of the inner wall of the limiting pipe 208, that is, no longer supports the lower baffle 204, the lower baffle 204 loses the rigid support from below instantaneously, at this time, the spring 205 in the compressed energy storage state immediately releases the elastic potential energy, and the spring 205 pushes the lower baffle 204 downward violently, because the lower baffle 204 is fixedly connected with the connecting column 202, the huge pushing force forces the connecting column 202 to slide downward along the guide hole of the support frame 201 rapidly, the connecting column 202 drives the gate knife 210 at the bottom to sink synchronously, the gate knife 210 quickly cuts into the flow passage of the shut-off valve body 1, the sealing ring 211 installed on the outer wall of the gate knife 210 is pressed into the flow passage section and forms an interference fit with the inner wall of the shut-off valve body 1, so as to tightly block the gas passage and realize rapid cutting;

[0035] When the installation or maintenance of the emergency shut-off valve device for gas pipeline is needed, the operator first places the shut-off valve body 1 at the predetermined connection position of the conveying pipe 4, loosens the screw 304 and adjusts the extension length of the telescopic column 303 in the connecting pipe 302 according to the specific height and angle of the conveying pipe 4, tightens the screw 304 to fix the telescopic column 303 after the position is appropriate, then rotates the connecting plate 306 to make the clamping plate 308 align with the outer wall of the conveying pipe 4, and then the operator rotates the rotating handle 312, which drives the threaded rod 311 to rotate in the internal threaded pipe 310 and advance forward, the threaded rod 311 pushes the connecting plate 306 and the clamping plate 308 to move towards the conveying pipe 4 through the rotating joint 305, until the clamping plate 308 tightly abuts against the outer wall of the conveying pipe 4, at this time the clamping mechanism 3 firmly locks the shut-off valve body 1 on the conveying pipe 4 through mechanical pressure, and the quick installation and sealed connection of the emergency shut-off valve device for gas pipeline are completed.

Claims

1. An emergency shut-off valve apparatus for a gas pipeline, comprising: The utility model provides a cutting valve body (1), the left and right sides of cutting valve body (1) are communicated with the delivery pipe (4), the top of cutting valve body (1) is provided with throttling mechanism (2), the bottom of cutting valve body (1) is provided with clamping mechanism (3), It is characterized in that the throttling mechanism (2) includes a support frame (201) fixedly connected to the top of the outer wall of the cutting valve body (1), a connecting column (202) slidably connected to the middle of the inner wall of the support frame (201), an upper baffle (203) and a lower baffle (204) fixedly connected to the upper and lower sides of the middle of the outer wall of the connecting column (202), respectively, a spring (205) installed between the top of the outer wall of the lower baffle (204) and the top of the inner wall of the support frame (201), and a gate (210) fixedly connected to the bottom of the outer wall of the connecting column (202).

2. Emergency shut-off valve device for gas pipes according to claim 1, characterized in that The clamping mechanism (3) includes a fixed column (301) fixedly connected to the bottom of the outer wall of the cutting valve body (1), a support column (309) and a connecting pipe (302) fixedly connected to the top of the outer wall of the fixed column (301), respectively, an internally threaded pipe (310) installed on the top of the outer wall of the support column (309), a threaded rod (311) threadedly connected to the middle of the inner wall of the internally threaded pipe (310), a telescopic column (303) slidably connected to the middle of the inner wall of the connecting pipe (302), a rotary joint (305) fixedly connected to the top of the outer wall of the telescopic column (303), a connecting plate (306) fixedly connected to the other side of the outer wall of the rotary joint (305), and a clamping plate (308) installed on the other end of the connecting plate (306).

3. Emergency shut-off valve device for gas pipes according to claim 2, characterized in that The outer wall of the support frame (201) is installed with a limiting tube (208), the middle of the inner wall of the limiting tube (208) is slidably connected with a positioning pin (207), the rear side of the outer wall of the positioning pin (207) is fixedly connected with a connecting block (206), the connecting block (206) is installed on the bottom of the outer wall of the lower baffle (204), the middle of the inner wall of the support frame (201) is slidably connected with a positioning pin (209), and the positioning pin (209) penetrates through the support frame (201) and abuts against the outer wall of the positioning pin (207).

4. The emergency shut-off valve apparatus for a gas pipeline according to claim 1, characterized by, The upper baffle (203) is located on the top of the outer wall of the support frame (201), and the lower baffle (204) is located in the middle of the inner wall of the support frame (201).

5. The emergency shut-off valve apparatus for a gas pipeline according to claim 1, characterized by, The outer wall of the gate (210) is installed with a sealing ring (211), and the sealing ring (211) is interference-fitted in the internal passage of the cutting valve body (1).

6. The emergency shut-off valve apparatus for a gas pipeline according to claim 2, characterized by, The other end of the outer wall of the threaded rod (311) is fixedly connected with a rotating handle (312).

7. The emergency shut-off valve apparatus for a gas pipeline according to claim 2, characterized by, The outer wall of the connecting pipe (302) is threadedly connected with a screw (304), and the end of the screw (304) abuts against the outer wall of the telescopic column (303).

8. The emergency shut-off valve apparatus for a gas pipeline according to claim 2, characterized by, The outer wall of the connecting plate (306) is threadedly connected with a screw (307) on both sides, the screw (307) penetrates through the connecting plate (306) and is connected to the clamping plate (308).

Images