Emergency cut-off valve

Abstract

The utility model discloses an emergency cut-off valve, which belongs to the technical field of gas valves, and adopts the technical scheme that the emergency cut-off valve comprises a valve body, a base, a connecting seat and a driving mechanism, the valve body is provided with a gas inlet runner, an assembly groove, a transfer cavity and a gas outlet runner, the gas inlet runner is communicated with the assembly groove, the assembly groove is communicated with the transfer cavity, and the transfer cavity is communicated with the gas outlet runner; the base is connected to the valve body and seals the transfer cavity, the connecting base is rotationally connected to the end of the driving mechanism, the driving mechanism is connected with the base through the connecting base, and the driving mechanism can rotate relative to the valve body; an executing mechanism is arranged in the assembling groove, and the driving mechanism can drive the executing mechanism to move so as to control connection and disconnection of the transfer cavity and the assembling groove. The driving mechanism can rotate by 360 degrees relative to the valve body, connection and control between the driving mechanism and the executing mechanism are not affected, even if the stop valve is installed in a narrow space or close to the wall, the driving mechanism cannot interfere with the wall, and applicability is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas valves, and particularly relates to an emergency cut-off valve. Background Art

[0002] The gas emergency shut-off valve is an important safety device, usually installed on the gas pipeline. Its key function is to quickly cut off the gas supply in the event of a gas leak or other emergency. The gas emergency shut-off valve can be connected to a variety of equipment such as combustible gas leak monitoring instruments, extreme temperature or pressure safety controllers of thermal equipment, and central fire alarm systems of high-rise buildings. When a combustible gas leak is detected, the equipment temperature or pressure exceeds the set limit, or a fire occurs in a high-rise building, the gas emergency shut-off valve will automatically and quickly close the gas supply valve, cut off the gas supply, and prevent accidents. At the same time, under the premise of ensuring safety, the gas emergency shut-off valve can also be manually reset to restore the equipment to working condition. In addition, the gas emergency shut-off valve is also widely used in the gas supply network of cities or factories. It is centrally controlled by the central control room and remotely controlled to emergency cut off the gas supply of the pipeline at the accident site.

[0003] For example, the bottled liquefied petroleum gas safety alarm cut-off device disclosed in the Chinese patent with announcement number CN106016380A includes a pressure regulator, a gas concentration detector and an alarm. One end of the pressure regulator is connected to the liquefied gas cylinder, and the other end is connected to the gas stove through a ball valve. The gas concentration detector and the alarm are both installed on the wall of the space where the liquefied gas cylinder is located, and the gas concentration detector is electrically connected to the alarm. The cut-off device also includes a gas cut-off valve, which is connected to the driving end of the ball valve and is electrically connected to the alarm. The gas cut-off valve is an electrically controlled valve. The cut-off device does not specifically disclose the specific structure of the gas cut-off valve.

[0004] The Chinese patent with announcement number CN219889327U discloses an emergency shut-off valve and a combination valve for a high-pressure end of a bottled gas. The emergency shut-off valve for a high-pressure end of a bottled gas comprises a valve body with an air inlet and an air outlet, an air passage connecting the air inlet and the air outlet is arranged in the valve body, an air inlet joint is connected to the valve body, one end of the air inlet joint is threadedly connected to the air inlet, a push rod is vertically arranged in the valve body, a valve seat is connected to the valve body, and the push rod is penetrated in the valve seat; a driving mechanism which can drive the push rod to move up and down and position the push rod after it moves into place is connected to the side of the valve body, and the driving mechanism comprises an electromagnetic control component and a reset spring acting on the push rod in a direction away from the sealing member. An annular sealing seat is arranged in the air passage, and the sealing seat abuts against the annular partition; an action spring and a sealing member under the push rod are also arranged in the air passage, and a tapered guide surface is arranged in the hole at one end of the sealing seat, and the sealing member abuts against the hole at the end of the sealing seat, and there is a clearance between the sealing member and the inner wall of the valve body along the axial direction of the push rod. When the sealing member blocks the hole at the end of the sealing seat, emergency shut-off can be achieved, and when the push rod pushes the sealing member away from the sealing seat, the emergency shut-off valve can be opened.

[0005] The above technical solution has the following defects: the above emergency switching valve needs to be powered or electrically connected to the alarm, specifically, the electromagnetic control component needs to be powered by a wire to work normally, and the electromagnetic control component can also be manually controlled in power outages or emergency situations; the emergency switching valve is generally connected to the mouth of the liquefied gas cylinder. For safety or storage reasons, the liquefied gas cylinder will be placed under the cabinet countertop. The space under the cabinet countertop is limited and close to the wall, but the electromagnetic control component is threadedly connected to the valve body through the valve seat, so that the angle of the electromagnetic control component and the valve body after assembly is fixed, and the external mesh tail of the electromagnetic control component is relatively long, resulting in the emergency switching valve being close to the wall or the installation space is narrow. The installation and use of the above emergency switching valve is not convenient, that is, the above emergency switching valve is not suitable for use in actual applications. Utility Model Content

[0006] The purpose of the utility model is to propose an emergency shut-off valve in view of the above-mentioned problems existing in the prior art. The technical problem to be solved by the utility model is: how to improve the applicability of the shut-off valve.

[0007] The above technical objectives of the utility model can be achieved through the following technical solutions:

[0008] An emergency shut-off valve comprises a valve body, a base, a connecting seat and a driving mechanism, wherein the valve body has an inlet flow channel, an assembly groove, a transfer chamber and an outlet flow channel, wherein the inlet flow channel is connected to the assembly groove, the assembly groove is connected to the transfer chamber, and the transfer chamber is connected to the outlet flow channel; the base is connected to the valve body and seals the transfer chamber, the connecting seat is rotatably connected to the end of the driving mechanism, the driving mechanism is connected to the base via the connecting seat, and the driving mechanism can rotate relative to the valve body; an actuator is arranged in the assembly groove, and the driving mechanism can drive the actuator to move, thereby controlling the on-off of the transfer chamber and the assembly groove.

[0009] In the above-mentioned emergency shut-off valve, the driving mechanism includes a shell, a bracket, an iron core, and a magnetic block. The lower end of the shell is provided with an annular groove, and the annular groove is adapted to the protrusion provided on the connecting seat. The bracket is provided in the shell, and a coil is provided outside the bracket. The iron core is slidably provided in the bracket, and the iron core can drive the actuator to move. The magnetic block is provided in the shell, and the magnetic block can position the iron core.

[0010] In the above emergency shut-off valve, at least one annular groove is provided, and the number of the protrusions corresponds to the number of the annular grooves.

[0011] In the above-mentioned emergency shut-off valve, the connecting seat is injection-molded at the lower end of the shell.

[0012] In the above-mentioned emergency shut-off valve, the coil is connected to a power supply line, and a mesh tail wrapping the power supply line is provided on the shell.

[0013] In the above emergency shut-off valve, the upper end of the shell has an escape hole for the iron core to slide, the shell is provided with an end cover, the upper end of the iron core is provided with a pull rod, and the upper end of the pull rod passes through the end cover and is located outside the shell.

[0014] In the above-mentioned emergency shut-off valve, the housing has a connecting portion, and a protective cap is provided on the connecting portion, and the protective cap covers the upper end of the pull rod.

[0015] In the above-mentioned emergency shut-off valve, the actuator includes a pressure cap, a spring, a plug, and a push rod. The pressure cap is arranged at the notch of the assembly groove. The pressure cap has a clearance hole connecting the assembly groove and the transfer cavity. The spring is arranged at the bottom of the assembly groove. The plug is slidably arranged in the assembly groove. The spring can apply a pre-tightening force to the plug pointing in the direction of the pressure cap so that the plug blocks the clearance hole. One end of the push rod is connected to the plug, and the other end of the push rod passes through the clearance hole and the center hole opened on the base and then abuts against the iron core.

[0016] In the above emergency shut-off valve, the diameter of the relief hole is larger than the diameter of the push rod.

[0017] In the above-mentioned emergency shut-off valve, a mounting groove connected to the center hole is provided on the base, a sealing ring is provided in the mounting groove, and the inner ring of the sealing ring is pressed against the outer wall of the push rod; a limiting groove is provided at the notch of the mounting groove, a gasket for limiting the sealing ring is provided in the limiting groove, and the limiting groove limits the gasket.

[0018] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0019] The magnetic block positions the iron core so that the iron core will not be displaced in the bracket, and the push rod and spring control the height of the plug in the assembly groove. When the plug is separated from the pressure cap, the assembly groove and the transfer chamber are connected, that is, the inlet flow channel, the assembly groove, the transfer chamber, and the outlet flow channel are in a connected state, and the shut-off valve is in an open state; in case of emergency, the electromagnetic force generated by the coil after power is turned on offsets the magnetic force of the magnetic block, so that the magnetic block can no longer adsorb the iron core, and the spring can easily push the plug, the push rod, the iron core, and the pull rod upward, and the plug can press the pressure cap, thereby isolating the assembly groove from the transfer chamber, and the shut-off valve is in a closed state. In addition, when manual control is required, the protective cap is removed and the pull rod is pressed, so that the pull rod drives the iron core, the push rod, and the plug to move downward, the assembly groove is connected to the transfer chamber, the spring is compressed, and the magnetic block positions the iron core, thereby keeping the iron core in the bracket unchanged, and the shut-off valve is in a normally open state; lift the pull rod, the plug can move up and block the lower end of the clearance hole, and the shut-off valve is in a normally closed state. Since the drive mechanism can rotate 360° relative to the valve body, the connection and control between the drive mechanism and the actuator are not affected. Even if the cut-off valve is installed in a narrow space or close to a wall, the power supply line and the tail of the net will not interfere with the wall or face the wall. Compared with the existing cut-off valves, it is more suitable for installation and use and has a wider range of applicability. In addition, the connection seat is injection molded on the drive mechanism, which reduces the gap between the ring groove and the protrusion. The resistance to the rotation of the drive mechanism is relatively large. After the drive mechanism rotates, it can maintain the position after displacement. The ring groove can also guide the protrusion, thereby improving the stability of the rotating mechanism during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the external structure of the embodiment;

[0021] Figure 2 is a cross-sectional schematic diagram of a valve body;

[0022] Figure 3 for Figure 1 A cross-sectional schematic diagram of

[0023] Figure 4is a cross-sectional schematic diagram of a driving mechanism;

[0024] Figure 5 It is a schematic diagram of the explosion structure of the driving mechanism;

[0025] Figure 6 is a cross-sectional schematic diagram of the actuator;

[0026] Figure 7 It is a structural schematic diagram of the embodiment in the open state.

[0027] Reference numerals: 100, valve body; 110, inlet flow passage; 120, assembly groove; 130, transfer chamber; 140, outlet flow passage; 150, connection hole;

[0028] 200, base; 210, center hole; 220, mounting groove; 221, sealing ring; 230, limiting groove; 231, gasket; 232, closing;

[0029] 300, connecting seat; 310, protrusion;

[0030] 400, driving mechanism; 410, housing; 411, housing 1; 412, housing 2; 413, ring groove; 414, net tail; 415, avoidance hole; 416, connecting part; 420, bracket; 421, coil; 422, power supply line; 430, iron core; 431, pull rod; 432, hand wheel; 440, magnetic block;

[0031] 500, actuator; 510, pressure cap; 511, clearance hole; 520, spring; 530, plug; 531, positioning seat; 540, ejector rod;

[0032] 600, end cover; 700, protective cap. DETAILED DESCRIPTION

[0033] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0034] An emergency shut-off valve, such as Figures 1 to 7As shown, it includes a valve body 100, a base 200, a connecting seat 300 and a driving mechanism 400. The valve body 100 has an inlet flow channel 110, an assembly groove 120, a transfer chamber 130, and an outlet flow channel 140. The inlet flow channel 110 is connected to the assembly groove 120, the assembly groove 120 is connected to the transfer chamber 130, and the outlet flow channel 140 is connected to the transfer chamber 130 through a connecting hole 150; the base 200 is connected to the valve body 100 and seals the transfer chamber 130, the connecting seat 300 is rotatably connected to the end of the driving mechanism 400, the driving mechanism 400 is connected to the base 200 through the connecting seat 300, and the driving mechanism 400 can rotate relative to the valve body 100; an actuator 500 is arranged in the assembly groove 120, and the driving mechanism 400 can drive the actuator 500 to move, thereby controlling the connection and disconnection of the transfer chamber 130 and the assembly groove 120.

[0035] like Figure 3-Figure 5 As shown, the driving mechanism 400 includes a shell 410, a bracket 420, an iron core 430, and a magnetic block 440. The lower end of the shell 410 is provided with an annular groove 413, and the annular groove 413 is adapted to the protrusion 310 provided on the connecting seat 300. The annular groove 413 and the protrusion 310 cooperate to limit the axial position of the shell 410 and the connecting seat 300, and the shell 410 can rotate 360° relative to the central axis of the connecting seat 300; the bracket 420 is arranged in the shell 410, and a coil 421 is arranged outside the bracket 420. The iron core 430 is slidably arranged in the bracket 420 and can drive the actuator 500 to move. The magnetic block 440 is arranged in the shell 410, and the magnetic block 440 can adsorb the iron core 430, thereby positioning the iron core 430.

[0036] At least one annular groove 413 is provided, and the number of protrusions 310 corresponds to the number of annular grooves 413; when multiple annular grooves 413 are provided, each annular groove 413 is provided at intervals. In at least one embodiment, the connection seat 300 is injection molded at the lower end of the shell 410, thereby forming the protrusion 310 in the annular groove 413, and at the same time, the connection seat 300 is not adhered to the shell 410, thereby ensuring that the shell 410 can achieve 360° rotation relative to the connection seat 300. Regardless of the number of annular grooves 413, after the connection seat 300 is injection molded, a protrusion 310 will be formed in each annular groove 413. Alternatively, the connection seat 300 is produced separately and symmetrically cut into two halves, and after the two halves of the connection seat 300 are clamped at the lower end of the shell 410, the connection seat 300 is bonded as a whole, which can also achieve the purpose of clamping the protrusion 310 into the annular groove 413.

[0037] The coil 421 is connected to a power supply line 422 or a signal control line, and a mesh tail 414 for protecting the power supply line 422 is disposed on the outer wall of the housing 410 .

[0038] In this embodiment, the housing 410 is injection molded and packaged outside the bracket 420 and the magnetic block 440, so that the driving mechanism 400 becomes an integral component; Figure 5 As shown, as another solution, the housing 410 is split into two parts, a housing 1 411 and a housing 2 412 , and the housing 1 411 and the housing 2 412 are snap-fitted or bonded into a whole, which also does not affect the normal implementation of this embodiment.

[0039] The upper end of the shell 410 has an avoidance hole 415 for the iron core 430 to slide, and the shell 410 is snap-fitted or threaded with an end cover 600. The upper end of the iron core 430 is provided with a pull rod 431, and the upper end of the pull rod 431 passes through the end cover 600 and is located outside the shell 410; the upper end of the pull rod 431 is provided with a hand wheel 432 for the user to hold.

[0040] The housing 410 has a connecting portion 416 , and a protective cap 700 is snap-fitted or threadedly connected to the connecting portion 416 . The protective cap 700 covers the upper end of the pull rod 431 , thereby preventing the pull rod 431 from being misoperated.

[0041] Specifically, if Figure 3 , Figure 6 As shown, the actuator 500 includes a pressure cap 510, a spring 520, a plug 530, and a push rod 540. The pressure cap 510 is arranged at the notch of the assembly groove 120. The pressure cap 510 has a clearance hole 511 that connects the assembly groove 120 and the transfer chamber 130, and the lower end of the clearance hole 511 can be connected to the intake channel 110; the spring 520 is arranged at the bottom of the assembly groove 120, and the plug 530 is slidably arranged in the assembly groove 120 and abuts against the spring 520. The spring 520 can apply a pre-tightening force to the plug 530 in the direction of the pressure cap 510, so that the plug 530 blocks the clearance hole 511, one end of the push rod 540 is connected to the plug 530, and the other end of the push rod 540 passes through the clearance hole 511 and the center hole 210 opened on the base 200 and then abuts against the iron core 430. The aperture of the clearance hole 511 is larger than the diameter of the push rod 540, so that there is a gap between the clearance hole 511 and the push rod 540 for gas to pass through. Since the upper end of the push rod 540 only abuts against the iron core 430, the driving mechanism 400 will not affect the driving of the iron core 430 on the actuator 500 when the driving mechanism 400 rotates at any angle.

[0042] In some embodiments, the plug 530 is made of a deformable soft material such as rubber or silicone, and a positioning seat 531 is provided at the lower end of the plug 530 to improve the structural strength of the plug 530. The plug 530 is in contact with the end of the spring 520 through the positioning seat 531, and the other end of the spring 520 is pressed against the bottom of the assembly groove 120.

[0043] like Figure 4 , Figure 6As shown, the base 200 is provided with an installation groove 220 connected to the center hole 210, and a sealing ring 221 is provided in the installation groove 220. The inner ring of the sealing ring 221 is pressed against the outer wall of the top rod 540, thereby ensuring the air tightness of the transfer chamber 130; a limiting groove 230 is provided at the notch of the installation groove 220, and a gasket 231 is provided in the limiting groove 230 for limiting the sealing ring 221, and a closing opening 232 for limiting the gasket 231 is provided at the notch of the limiting groove 230.

[0044] The working principle of the utility model is as follows:

[0045] The shut-off valve is connected to the gas outlet of the liquefied gas cylinder through a pipeline, so that the inlet flow channel 110 is connected to the liquefied gas cylinder, and the outlet flow channel 140 is connected to the gas stove through a pipeline; the gas concentration detector or alarm establishes a signal connection with the coil 421. Since the driving mechanism 400 can rotate 360 ​​degrees relative to the valve body 100, according to the actual installation environment, the driving mechanism 400 is rotated so that the mesh tail 414 on the outside of the shell 410 faces a direction without obstacles to prevent the power supply line 422 from being entangled on the shell 410.

[0046] like Figure 7 As shown, when the shut-off valve is in the open state, the plug 530 moves downward and separates from the pressure cap 510, the spring 520 is compressed, the magnetic block 440 adsorbs the iron core 430, and the iron core 430 is maintained at the current height in the bracket 420. The lower end of the iron core 430 can press against the push rod 540, and the push rod 540 and the spring 520 can maintain the state of the plug 530 being separated from the clearance hole 511. The gas in the liquefied gas cylinder is discharged from the inlet flow channel 110, the assembly groove 120, the clearance hole 511, the transfer chamber 130, and the outlet flow channel 140 in sequence. At this time, the shut-off valve can supply gas normally.

[0047] The gas concentration detector or alarm determines that the indoor gas is leaking and energizes the coil 421, so that the electromagnetic force generated by the coil 421 offsets the magnetic force of the magnetic block 440, and the magnetic block 440 can no longer absorb the iron core 430. The spring 520 can easily push the plug 530, the push rod 540, the iron core 430, and the pull rod 431 to move upward as a whole. The plug 530 can press against the lower end of the pressure cap 510 and block the clearance hole 511, so that the assembly groove 120 is separated from the transfer chamber 130, and the gas in the inlet flow channel 110 can no longer enter the assembly groove 120 and the clearance hole 511. Figure 3 As shown, the shut-off valve is in the closed state.

[0048] In addition, when manual control is required, the protective cap 700 is removed and the pull rod 431 is pressed, so that the pull rod 431 drives the iron core 430, the push rod 540, and the plug 530 to move downward as a whole, and the plug 530 opens the lower end of the clearance hole 511, and the clearance hole 511 can connect the inlet flow channel 110, the assembly groove 120 and the transfer chamber 130, and the spring 520 is compressed, and the magnetic block 440 positions the iron core 430, thereby keeping the iron core 430 at the current position, and the shut-off valve is in an open state;

[0049] Lifting the pull rod 431 causes the iron core 430 to move upward, and the push rod 540 loses the limit of the iron core 430. The spring 520 will push the plug 530 and the push rod 540 to move upward and reset, and keep the plug 530 against the lower end of the pressure cap 510. The plug 530 will block the lower end of the clearance hole 511 again. At this time, the push rod 540 presses against the iron core 430, and the magnetic block 440 still adsorbs the iron core 430 and maintains the position of the iron core 430 after the displacement. The shut-off valve is in a normally closed state.

[0050] The specific embodiments described in this article are merely examples of the spirit of the utility model; technicians in the technical field to which the utility model belongs can make various modifications or additions to the described specific embodiments or replace them in a similar manner, but will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.

Claims

1. An emergency shut-off valve, characterized in that: The invention comprises a valve body (100), a base (200), a connecting seat (300) and a driving mechanism (400); the valve body (100) has an inlet flow channel (110), an assembly groove (120), a transfer chamber (130) and an outlet flow channel (140); the inlet flow channel (110) is connected to the assembly groove (120), the assembly groove (120) is connected to the transfer chamber (130), and the transfer chamber (130) is connected to the outlet flow channel (140); the base (200) is connected to the valve body (100) and the transfer chamber (130) is connected to the outlet flow channel (140); The transfer chamber (130) is sealed, the connecting seat (300) is rotatably connected to the end of the driving mechanism (400), the driving mechanism (400) is connected to the base (200) via the connecting seat (300), and the driving mechanism (400) can rotate relative to the valve body (100); an actuator (500) is arranged in the assembly groove (120), and the driving mechanism (400) can drive the actuator (500) to move, thereby controlling the connection and disconnection of the transfer chamber (130) and the assembly groove (120).

2. The emergency shut-off valve according to claim 1, characterized in that: The driving mechanism (400) comprises a housing (410), a bracket (420), an iron core (430), and a magnetic block (440); a ring groove (413) is provided at the lower end of the housing (410); the ring groove (413) is adapted to a protrusion (310) provided on the connecting seat (300); the bracket (420) is provided in the housing (410); a coil (421) is provided outside the bracket (420); the iron core (430) is slidably provided in the bracket (420); the iron core (430) can drive the actuator (500) to move; the magnetic block (440) is provided in the housing (410); and the magnetic block (440) can position the iron core (430).

3. The emergency shut-off valve according to claim 2, characterized in that: At least one annular groove (413) is provided, and the number of the protrusions (310) corresponds one-to-one to the number of the annular grooves (413).

4. The emergency shut-off valve according to claim 2, characterized in that: The connection seat (300) is injection molded at the lower end of the housing (410).

5. The emergency shut-off valve according to claim 2, characterized in that: The coil (421) is connected to a power supply line (422), and the housing (410) is provided with a mesh tail (414) that wraps around the power supply line (422).

6. The emergency shut-off valve according to claim 2, characterized in that: The upper end of the shell (410) has an avoidance hole (415) for the iron core (430) to slide, the shell (410) is provided with an end cover (600), the upper end of the iron core (430) is provided with a pull rod (431), and the upper end of the pull rod (431) passes through the end cover (600) and is located outside the shell (410).

7. The emergency shut-off valve according to claim 6, characterized in that: The housing (410) has a connecting portion (416), and a protective cap (700) is provided on the connecting portion (416), and the protective cap (700) covers the upper end of the pull rod (431).

8. The emergency shut-off valve according to any one of claims 2 to 7, characterized in that: The actuator (500) comprises a pressure cap (510), a spring (520), a plug (530), and a push rod (540); the pressure cap (510) is arranged at the notch of the assembly groove (120); the pressure cap (510) has a clearance hole (511) for connecting the assembly groove (120) and the transfer cavity (130); the spring (520) is arranged at the bottom of the assembly groove (120); the plug (530) is slidably arranged at the bottom of the assembly groove (120); In the matching groove (120), the spring (520) can apply a pre-tightening force to the plug (530) pointing in the direction of the pressure cap (510), so that the plug (530) blocks the clearance hole (511), one end of the push rod (540) is connected to the plug (530), and the other end of the push rod (540) passes through the clearance hole (511) and the center hole (210) opened on the base (200) and then abuts against the iron core (430).

9. The emergency shut-off valve according to claim 8, characterized in that: The diameter of the clearance hole (511) is larger than the diameter of the push rod (540).

10. The emergency shut-off valve according to claim 8, characterized in that: The base (200) is provided with a mounting groove (220) connected to the central hole (210), a sealing ring (221) is provided in the mounting groove (220), and the inner ring of the sealing ring (221) is pressed against the outer wall of the push rod (540); a limiting groove (230) is provided at the notch of the mounting groove (220), a gasket (231) for limiting the sealing ring (221) is provided in the limiting groove (230), and the limiting groove (230) limits the gasket (231).

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