Electromagnetic type gas emergency cut-off valve and anti-explosion executing mechanism thereof

Abstract

The embodiment of the utility model provides an electromagnetic type gas emergency cut-off valve and an anti-explosion executing mechanism thereof. The electromagnetic type gas emergency cut-off valve comprises a valve opening handle assembly, the anti-explosion executing mechanism, a movable shaft core, a movable component and a main valve body. The explosion-proof executing mechanism comprises a permanent magnet lock assembly and a control module, the permanent magnet lock assembly comprises a permanent magnet lock and a plastic shell wrapping the permanent magnet lock through a pouring and sealing process, the plastic shell is further provided with a containing space, and the control module is arranged in the containing space. And the control module is electrically connected with the permanent magnet lock so as to control the permanent magnet lock. Compared with the prior art, according to the anti-explosion executing mechanism of the electromagnetic type gas emergency cut-off valve, the plastic shell is encapsulated outside the permanent magnet lock and the control module, an overall encapsulation anti-explosion structure is formed, the strength and the sealing performance of the plastic shell are improved, sealing and protection of the permanent magnet lock and the control module are achieved, and therefore the reliability of a product is improved, and the service life of the product is prolonged. And the product cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas valves, in particular to an electromagnetic gas emergency cut-off valve and an explosion-proof actuator thereof. Background Art

[0002] Gas valve explosion-proof actuators are widely used in industrial, commercial and residential gas systems to drive the opening and closing of gas valves. Therefore, gas valve explosion-proof actuators are key components to ensure the safety of gas systems and need to ensure their safe operation in potentially explosive environments.

[0003] At the same time, in order to prevent gas leakage, the actuator needs to have good sealing performance to ensure reliable sealing between all moving parts. Moreover, in potentially explosive environments, the actuator must avoid sparks to reduce the risk of igniting the gas.

[0004] Therefore, the structural design of the explosion-proof actuator is relatively complex. If manual control is used, emergency automatic cut-off cannot be achieved; if automatic control is used to cut off the solenoid valve, its manufacturing cost is too high, and professional knowledge is required for operation and maintenance. In addition, when a fault occurs and manual control is required, non-professionals cannot operate quickly. Utility Model Content

[0005] In view of this, it is necessary to provide an electromagnetic gas emergency shut-off valve and an explosion-proof actuator thereof.

[0006] On the one hand, an embodiment of the utility model provides an explosion-proof actuator for an electromagnetic gas emergency shut-off valve, the explosion-proof actuator comprising a permanent magnetic lock assembly and a control module, the permanent magnetic lock assembly comprising a permanent magnetic lock and a plastic shell wrapped around the permanent magnetic lock by a casting process, the plastic shell also having a accommodating space, the control module being arranged in the accommodating space, and the control module being electrically connected to the permanent magnetic lock for controlling the permanent magnetic lock.

[0007] Compared with the prior art, the explosion-proof actuator of the electromagnetic gas emergency shut-off valve provided in the embodiment of the present application forms an overall cast-in explosion-proof structure by covering the permanent magnetic lock and the control module with a plastic shell through a casting process, thereby improving the strength and sealing of the plastic shell, achieving sealing and protection of the permanent magnetic lock and the control module, and achieving electrical isolation, thereby avoiding electric shock and ignition of gas. It is also suitable for use in harsh environments, and can provide a certain degree of electromagnetic shielding to avoid external influences on the permanent magnetic lock and control components inside, thereby improving the reliability of the product. At the same time, the use of a plastic shell facilitates the production and processing of various structures, which can effectively reduce product costs.

[0008] In one embodiment, the control module is used for the on / off, fault diagnosis and / or remote functions of the permanent magnetic lock, and the control module includes a control circuit board; the plastic shell includes a first part and a second part, the first part is covered outside the permanent magnetic lock, the second part is connected to the first part and has the accommodation space, the control module is installed in the accommodation space and is connected to an external device through a first electrical connector that passes through the second part and / or is electrically connected to the permanent magnetic lock through a second electrical connector that passes through the first part. The plastic shell is divided into two parts to respectively encapsulate the control module and the permanent magnetic lock, respectively achieving electrical isolation, improving sealing safety, and better protecting internal components.

[0009] In one embodiment, the permanent magnetic lock includes a static iron core, a magnet, a frame, an electromagnetic coil, a magnetic shell, and a baffle. The static iron core and the magnet form a permanent magnetic lock component. The frame has a central channel. The frame and the electromagnetic coil are sleeved around the permanent magnetic lock component. The magnetic shell and the baffle are arranged outside the electromagnetic coil. The electromagnetic coil is electrically connected to the control module. The magnetic shell can reduce the impact of external electromagnetic interference on the permanent magnetic lock component, and can also prevent activation caused by friction or contact, thereby reducing the risk of igniting gas.

[0010] In one embodiment, the permanent magnetic lock component is located at one end of the skeleton, the magnetic conductive shell is sleeved around the electromagnetic coil and located between the electromagnetic coil and the plastic shell, and the baffle is arranged at one end of the skeleton away from the permanent magnetic lock component.

[0011] In one embodiment, the magnet is an annular magnet and is sleeved on the static iron core, and the static iron core is connected or welded to the magnetic conductive shell; the permanent magnetic lock also includes a magnetic isolation metal part, and the magnetic isolation metal part is arranged on the inner wall of the skeleton.

[0012] In one embodiment, the explosion-proof actuator further comprises a metal shell, the metal shell is fixedly mounted on the outside of the plastic shell; the metal shell has a first guide structure, the plastic shell has a second guide structure matched with the first guide structure, the metal shell is guided and installed with the plastic shell through the first guide structure and the second guide structure; one of the first guide structure and the second guide structure is a guide protrusion, and the other of the first guide structure and the second guide structure is a guide groove. Adding the metal shell can enhance the protection strength of the actuator; setting the guide structure facilitates the assembly of the metal shell, thereby improving production efficiency and reducing production costs.

[0013] In one embodiment, the explosion-proof actuator further includes an induction device, which is disposed in the accommodation space and electrically connected to the control module, and is used to sense the on / off state of the permanent magnetic lock and send an induction signal to the control module; the induction device includes a magnetic induction switch or a magnetic induction circuit. The induction device is provided to sense the on / off state of the permanent magnetic lock, so as to facilitate automatic judgment and control of the product, thereby facilitating the control module to realize different functions.

[0014] In one embodiment, the explosion-proof actuator further includes a waterproof structure, the plastic shell includes a main body and a boss structure connected to the main body and arranged around an opening on one side of the central channel of the explosion-proof actuator, the waterproof structure includes a waterproof seal gasket arranged corresponding to the opening and a fixing member fixing the waterproof seal gasket; the fixing member is a retaining spring abutting between the boss structure and the waterproof seal gasket. The provision of the waterproof structure can better prevent impurities or water from entering the permanent magnetic lock, thereby avoiding affecting the operation of the permanent magnetic lock and reducing the failure rate of the product.

[0015] On the other hand, the utility model also provides an electromagnetic gas emergency shut-off valve, which includes a valve opening handle assembly, an explosion-proof actuator as described above, a moving shaft core, a movable component, and a main valve body. The valve opening handle assembly is arranged on one side of the explosion-proof actuator and at least partially extends into the central channel of the explosion-proof actuator. The moving shaft core is arranged in the central channel to connect the valve opening handle assembly, and the permanent magnetic lock is wound around the outer periphery of the moving shaft core. The movable component is connected to the moving shaft core. The main valve body includes a fluid inlet channel, a fluid outlet channel, and a connecting channel connected between the fluid inlet channel and the fluid outlet channel. The movable component is arranged in the connecting channel to control the fluid inlet channel and the fluid outlet channel to be connected or closed via the connecting channel under the drive of the moving shaft core when the permanent magnetic lock or the valve opening handle assembly drives the moving shaft core.

[0016] In one embodiment, the electromagnetic gas emergency shut-off valve also includes a driving member, which is arranged on the main valve body and connected to the movable part, and is used to drive the movable part, the main valve body includes a first valve body and a second valve body, the first valve body and the second valve body are arranged in sequence, and the explosion-proof actuator is fixed on the side of the second valve body away from the first valve body; the valve opening handle assembly includes a handle and a button, the handle has a through mounting groove, the button is slidably installed in the mounting groove and connected to the moving shaft core, when the electromagnetic gas emergency shut-off valve is turned on, the button protrudes from the mounting groove, and when the electromagnetic gas emergency shut-off valve is closed, the button is hidden in the mounting groove.

[0017] Compared with the prior art, the electromagnetic gas emergency shut-off valve provided in the embodiment of the present application adopts the aforementioned explosion-proof actuator and also has the beneficial effects of the explosion-proof actuator; at the same time, the valve opening handle assembly is provided, which can realize manual control while automatically controlling the shut-off, and is convenient for manual operation in an emergency, providing double protection and ensuring the safety of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a stereoscopic diagram of an electromagnetic gas emergency shut-off valve provided by an embodiment of the utility model.

[0020] Figure 2 yes Figure 1 A three-dimensional view of the electromagnetic gas emergency shut-off valve from another angle is shown.

[0021] Figure 3 yes Figure 1 The three-dimensional exploded view of the electromagnetic gas emergency shut-off valve is shown.

[0022] Figure 4 yes Figure 1 Another exploded perspective view of the electromagnetic gas emergency shut-off valve shown.

[0023] Figure 5 yes Figure 1 The three-dimensional exploded view of the explosion-proof actuator of the electromagnetic gas emergency shut-off valve is shown.

[0024] Figure 6 yes Figure 1 Another three-dimensional exploded view of the explosion-proof actuator of the electromagnetic gas emergency shut-off valve shown.

[0025] Figure 7 yes Figure 1 The schematic cross-sectional view of the electromagnetic gas emergency shut-off valve along line VII-VII is shown.

[0026] Figure 8 yes Figure 1 The schematic cross-sectional view of the electromagnetic gas emergency shut-off valve along line Ⅷ-Ⅷ is shown.

[0027] Description of reference numerals:

[0028] 100. Electromagnetic gas emergency shut-off valve; 1. Explosion-proof actuator; 2. Valve opening handle assembly; 3. Moving shaft core; 4. Movable parts; 5. Main valve body; 6. Driving part; 7. Protective cover; 11. Permanent magnetic lock; 12. Control module; 13. Plastic shell; 14. Metal shell; 15. Inductive device; 16. Waterproof structure; 21. Handle; 21a. Mounting slot; 22. Button; 51. Fluid inlet channel; 52. Fluid outlet channel; 53. Connecting channel; 54. The first valve body; 55, the second valve body; 111, the static iron core; 112, the magnet; 113, the skeleton; 114, the electromagnetic coil; 115, the magnetic conductive shell; 116, the baffle; 117, the magnetic isolation metal member; 131, the first part; 132, the second part; 132a, the accommodating space; 133, the second guide structure; 134, the main body; 135, the boss structure; 141, the first guide structure; 121, the control circuit board; 161, the waterproof sealing gasket; 162, the fixing member. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0031] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0032] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0034] See also Figure 1 and Figure 2 As shown, Figure 1 and Figure 2 The electromagnetic gas emergency shut-off valve 100 provided by the embodiment of the utility model is a three-dimensional diagram at two angles. The electromagnetic gas emergency shut-off valve 100 can be used in industrial, commercial or residential gas systems to drive the opening and closing of gas valves.

[0035] See also Figure 3 and Figure 4 The electromagnetic gas emergency shut-off valve 100 provided in this embodiment includes a valve opening handle assembly 2, an explosion-proof actuator 1, a moving shaft core 3, a movable component 4, and a main valve body 5; the valve opening handle assembly 2 is arranged on one side of the explosion-proof actuator 1, and at least partially extends into the central channel of the explosion-proof actuator 1; the moving shaft core 3 is arranged in the central channel to connect the valve opening handle assembly 2, and the permanent magnetic lock 11 of the explosion-proof actuator 1 is wound around the outer periphery of the moving shaft core 3, and the movable component 4 is connected to the moving shaft core 3; the main valve body 5 includes a fluid inlet channel 51, a fluid outlet channel 52, and a connecting channel 53 connected between the fluid inlet channel 51 and the fluid outlet channel 52, and the movable component 4 is arranged in the connecting channel 53, which is used to control the fluid inlet channel 51 and the fluid outlet channel 52 to be connected or closed via the connecting channel 53 under the drive of the moving shaft core 3 when the permanent magnetic lock 11 or the valve opening handle assembly 2 drives the moving shaft core 3. In this embodiment, the movable shaft core 3 is a movable iron core. The valve opening handle assembly 2 can realize manual control while automatically controlling the cut-off, which is convenient for manual operation in an emergency, and double protection ensures the safety of the product.

[0036] In this embodiment, the permanent magnetic lock 11 can be used to drive the moving shaft core 3 to drive the movable component 4 to open or close the connection channel 53, and the driving is realized by the control module 12 in the explosion-proof actuator 1, so as to realize automatic control of the moving shaft core 3 to realize automatic connection or closing of the connection channel 53, and then realize the control of opening or closing of the gas; the moving shaft core 3 can also be driven by the valve opening handle assembly 2, that is, the valve opening handle assembly 2 is manually controlled to realize the opening or closing of the gas. In other embodiments, only one of them can be used to drive the moving shaft core 3.

[0037] Specifically, the electromagnetic gas emergency shut-off valve 100 further includes a driving member 6, which is arranged on the main valve body 5 and connected to the movable component 4, and is used to drive the movable component 4. The main valve body 5 includes a first valve body 54 and a second valve body 55, and the first valve body 54 and the second valve body 55 are arranged in sequence, and the explosion-proof actuator 1 is fixed on the side of the second valve body 55 away from the first valve body 54. The valve opening handle assembly 2 includes a handle 21 and a button 22, and the handle 21 has a through installation groove 21a, and the button 22 is slidably installed in the installation groove 21a and connected to the moving shaft core 3. When the electromagnetic gas emergency shut-off valve 100 is turned on, the button 22 protrudes from the installation groove 21a, and when the electromagnetic gas emergency shut-off valve 100 is closed, the button 22 is hidden in the installation groove 21a. Specifically, the second valve body 55 is a valve cover, which covers the first valve body 54.

[0038] In this embodiment, the driving member 6 is an elastic member, and the two ends of the elastic member are respectively connected to the second valve body 55 and the movable member 4. The elastic member is in a compressed state and has elastic force. Since the second valve body 55 is connected to the first valve body 54, the movable member 4 is arranged therein. Under the action of this elastic force, the elastic member drives the movable member 4 to move toward the direction of the first valve body 55. However, since the moving shaft core 3 is subjected to the magnetic force of the permanent magnetic lock 11, it can drive the movable member 4 to approach or move away from the first valve body 55.

[0039] Specifically, the electromagnetic gas emergency shut-off valve 100 is taken as a normally closed shut-off valve for explanation. The electromagnetic gas emergency shut-off valve 100 is powered on (energized) and works normally, and is in an open state, that is, the gas is conducted. At this time, the elastic member is in a first compression state, and the magnetic force of the permanent magnetic lock 11 on the moving shaft core 3 is greater than the elastic force of the elastic member, and the movable member 4 is away from the first valve body 55, thereby ensuring the conduction of the gas; when the electromagnetic gas emergency shut-off valve 100 is powered off (powered off), the magnetic force of the permanent magnetic lock 11 is less than the elastic force of the elastic member, and the movable member 4 abuts against the first valve body 55 under the action of the elastic force, thereby making the electromagnetic gas emergency shut-off valve 10 0 is closed, and the gas is shut off. At this time, the elastic member is in the second compressed state. Under the action of this elastic force, the movable member 4 is tightly buckled on the first valve body 55, thereby ensuring that the connecting channel 53 is firmly closed; when the electromagnetic gas emergency shut-off valve 100 is powered on again, the movable shaft core 3 and the movable member 4 are moved to the permanent magnetic lock 11 through the valve opening handle assembly 2. At this time, the magnetic force of the permanent magnetic lock 11 is greater than the elastic force of the elastic member, thereby locking the movable shaft core 3 and realizing the conduction of the gas. At this time, the elastic member is deformed and restored from the second compressed state to the first compressed state.

[0040] In this embodiment, the electromagnetic gas emergency shut-off valve 100 further includes a protective cover 7, which covers the valve opening double handle 21 assembly to protect it, prevent water or foreign dust from falling into it, and also prevent accidental touching of the valve opening handle assembly 2. When it is needed, the protective cover 7 can be opened to operate the valve opening handle assembly 2.

[0041] In the embodiment of the present application, the explosion-proof actuator 1 serves as an important control component of the electromagnetic gas emergency shut-off valve 100, and this structure will be described in detail below.

[0042] See also Figure 5 and Figure 6 , an explosion-proof actuator 1 of an electromagnetic gas emergency shut-off valve 100 provided in an embodiment of the utility model, the explosion-proof actuator 1 includes a permanent magnetic lock component and a control module 12, the permanent magnetic lock component includes a permanent magnetic lock 11 and a plastic shell 13 coated on the outside of the permanent magnetic lock 11 by a casting process, the plastic shell 13 also has a accommodating space 132a, the control module 12 is arranged in the accommodating space 132a, and the control module 12 is electrically connected to the permanent magnetic lock 11 for controlling the permanent magnetic lock 11.

[0043] Compared with the prior art, the explosion-proof actuator 1 of the electromagnetic gas emergency shut-off valve 100 provided in the embodiment of the present application forms an integral cast-in explosion-proof structure by encapsulating the plastic shell 13 outside the permanent magnetic lock 11 and the control module 12 through a casting process, thereby improving the strength and sealing of the plastic shell 13, achieving sealing and protection of the permanent magnetic lock 11 and the control module 12, and achieving electrical isolation, thereby avoiding electric shock and ignition of gas. It is also suitable for use in harsh environments, and can provide a certain degree of electromagnetic shielding to avoid external influences on the permanent magnetic lock 11 and control components inside, thereby improving the reliability of the product; at the same time, the use of the plastic shell 13 is convenient for the production and processing of various structures, which can effectively reduce product costs.

[0044] Further, the control module 12 is used for the on / off, fault diagnosis and / or remote function of the permanent magnetic lock 11, and the control module 12 includes a control circuit board 121; the plastic shell 13 includes a first part 131 and a second part 132, the first part 131 is covered outside the permanent magnetic lock 11, the second part 132 is connected to the first part 131 and has the accommodation space 132a, the control module 12 is installed in the accommodation space 132a and is connected to an external device through a first electrical connector (not shown in the figure) that passes through the second part 132 and / or is electrically connected to the permanent magnetic lock 11 through a second electrical connector (not shown in the figure) that passes through the first part 131. The plastic shell 13 is divided into two parts to respectively encapsulate the control module 12 and the permanent magnetic lock 11, respectively achieve electrical isolation, improve sealing safety, and better protect internal components.

[0045] In this embodiment, the control module 12 can be equipped with different functional modules to achieve different functions, such as an Internet of Things functional module, a fault self-diagnosis functional module, a passive control functional module, etc. Specifically, in this embodiment, when the control module 12 receives an alarm signal, the output pipe valve signal controls the permanent magnetic lock 11 to close the valve to achieve gas shutoff; the control module 12 also has a wireless communication module to upload the working status and operation of the valve to the cloud or client, so that the staff or users can understand the working status of the valve. Of course, this application does not make any specific restrictions on what functions the control module 12 adopts.

[0046] In this embodiment, the plastic housing 13 is provided with a hole that passes through the second part 132 and connects the accommodating space 132a with the outside of the explosion-proof actuator 1, which is used to pass through the first electrical connector to electrically connect to an external device; and is also provided with a hole that passes through the first part 131 and connects to the accommodating space 132a, which is used to pass through the second electrical connector to achieve electrical connection between the control module 12 and the permanent magnetic lock 11. Of course, in other embodiments, only one hole may be provided, as long as the control module 12 can be electrically connected to the permanent magnetic lock 11 or the control module 12 can be electrically connected to an external device.

[0047] See also Figure 7 and Figure 8 In this embodiment, the permanent magnetic lock 11 includes a static iron core 111, a magnet 112, a frame 113, an electromagnetic coil 114, a magnetic shell 115, and a baffle 116. The static iron core 111 and the magnet 112 form a permanent magnetic lock component. The frame 113 and the electromagnetic coil 114 are sleeved on the periphery of the permanent magnetic lock component. The magnetic shell 115 and the baffle 116 are arranged on the outside of the electromagnetic coil 114. The electromagnetic coil 114 is electrically connected to the control module 12. The magnetic shell 115 can reduce the influence of external electromagnetic interference on the permanent magnetic lock component, and can also prevent activation caused by friction or contact, thereby reducing the risk of igniting gas.

[0048] The permanent magnetic lock 11 is an efficient lock structure. The static iron core 111 directs the magnetic product energy of the magnet 112 to the central end face of the static iron core 111, and its attraction to the magnetic conductive material is the largest. Therefore, in this embodiment, the moving shaft core 3 is made of metal iron to ensure the magnetic attraction to the moving shaft core 3. The electromagnetic coil 114 can generate a magnetic field after being energized, thereby controlling the movement of the moving shaft core 3; when the direction of the magnetic field is the same as the direction of the magnetic field of the magnet 112, the superposition of magnetic forces makes the permanent magnetic force greater than the elastic force of the elastic member; when the direction of the magnetic field is opposite to the direction of the magnetic field of the magnet 112, the elastic force of the elastic member drives the moving shaft core 3 to move toward the direction of the first valve body 55, thereby reliably shutting off the gas.

[0049] In this embodiment, the magnetically conductive housing 115 can shield the magnetic fields of the magnet 112 and the electromagnetic coil 114 and adjust the distribution state of the magnetic field, thereby optimizing the magnetic force acting on the moving shaft core 3 .

[0050] In this embodiment, the skeleton 113 is a cylindrical structure, with a central channel in the middle of the skeleton 113 and openings at both ends. The permanent magnetic lock component is located in the opening at one end of the skeleton 113, and the magnetic conductive shell 115 is sleeved on the periphery of the electromagnetic coil 114 and is located between the electromagnetic coil 114 and the plastic shell 13. The baffle 116 is arranged at one end of the skeleton 113 away from the permanent magnetic lock component.

[0051] In order to prevent plastic parts such as the plastic shell 13 from thermal shrinkage and deformation, in the present embodiment, a magnetic isolation metal part 117 is also embedded in the skeleton 113. Specifically, the magnetic isolation metal part 117 is arranged on the inner wall of the central channel, so as to enhance the supporting strength of the skeleton 113 and effectively prevent deformation. It can also weaken the magnetic field strength in the central channel and avoid the generation of additional magnetic field influence on the moving shaft core 3.

[0052] Specifically, in this embodiment, the permanent magnetic lock component is arranged at one end of the skeleton 113 close to the valve opening handle assembly 2, so that when the valve opening handle assembly 2 is manually operated, it is less affected by the permanent magnetic lock component; at the same time, the position of the permanent magnetic lock component is also far away from the main valve body 5, increasing the formation distance of the moving shaft core 3, so that when the magnetic field strength of the magnet 112 is adjusted to control the opening or closing of the gas, the collision force between the moving shaft core 3 and the permanent magnetic lock component can be weakened, thereby avoiding sparks generated by collision and ensuring safety.

[0053] The magnet 112 is an annular magnet and is sleeved on the static iron core 111, and the static iron core 111 is connected or welded to the magnetic shell 115. It can be understood that in other embodiments, the static iron core 111 can also be connected to the magnetic shell 115 in other ways, such as hot pressing, gluing, or screwing. In this embodiment, the static iron core 111 and the magnetic shell 115 are integrated by stamping and other processes.

[0054] In order to better protect the explosion-proof actuator 1, the explosion-proof actuator 1 further includes a metal shell 14, which is fixedly mounted on the outside of the plastic shell 13; the metal shell 14 has a first guide structure 141, and the plastic shell 13 has a second guide structure 133 that cooperates with the first guide structure 141, and the metal shell 14 is guided and installed with the plastic shell 13 through the first guide structure 141 and the second guide structure 133; one of the first guide structure 141 and the second guide structure 133 is a guide protrusion, and the other of the first guide structure 141 and the second guide structure 133 is a guide groove. In this embodiment, the first guide structure 141 is a guide protrusion, and the second guide structure 133 is a guide groove. In other embodiments, the first guide structure 141 can be a guide groove, and the second guide structure 133 can be a guide protrusion. Adding the metal shell 14 can enhance the protection strength of the actuator; setting the guide structure facilitates the assembly of the metal shell 14, thereby improving production efficiency and reducing production costs.

[0055] In this embodiment, the metal shell 14 and the second valve body 55 are connected by screwing or riveting, so that the explosion-proof actuator 1 is fixed to the second valve body 55. The metal shell 14 can be formed by casting, die-casting, stretching, welding and other processes, and is provided with threads connected to the explosion-proof flexible hose, so as to improve the strength of the metal shell 14 and the convenience of connecting with the outside.

[0056] Since the permanent magnetic lock 11 is encapsulated with a plastic shell 13 and a metal shell 14 on the outside in this embodiment, it is difficult to judge whether the permanent magnetic lock 11 is on or off. Therefore, the explosion-proof actuator 1 further includes an induction device 15, which is arranged in the accommodation space 132a and electrically connected to the control module 12, and is used to sense the on and off state of the permanent magnetic lock 11 and send an induction signal to the control module 12; the induction device 15 includes a magnetic induction switch or a magnetic induction circuit. The induction device 15 is arranged to sense the on and off state of the permanent magnetic lock 11, which is convenient for the product to automatically judge and control, thereby facilitating the control module 12 to realize different functions. In this embodiment, the magnetic conductive shell 115 has a defective position, and the magnetic field of the magnet 112 is transmitted to the induction device 15 through the defective position. When the induction device 15 is a magnetic induction switch, the on and off state of the permanent magnetic lock 11 is judged by measuring the on and off of the magnetic induction switch; when the induction device 15 is equipped with a magnetic induction circuit, the on and off state of the permanent magnetic lock 11 is judged by the induced magnetic field.

[0057] Specifically, the explosion-proof actuator 1 further includes a waterproof structure 16, and the plastic housing 13 includes a main body 134 and a boss structure 135 connected to the main body 134 and arranged around an opening on one side of the central channel of the explosion-proof actuator 1. Specifically, the boss structure 135 is arranged at one end of the first part 131 close to the static iron core 111. The waterproof structure 16 includes a waterproof sealing gasket 161 arranged corresponding to the opening and a fixing member 162 fixing the waterproof sealing gasket 161; the fixing member 162 is a retaining spring abutting between the boss structure 135 and the waterproof sealing gasket 161. The provision of the waterproof structure 16 can better prevent impurities or water from entering the permanent magnetic lock 11, thereby avoiding affecting the working operation of the permanent magnetic lock 11 and reducing the failure rate of the product.

[0058] In this embodiment, the combination of the explosion-proof actuator 1 and the main valve body 5 can realize different control modes, such as maintained normally open, maintained normally closed, and normally closed valves, so that it can be applied to different gas control scenarios and expand the scope of application of the product.

[0059] In this embodiment, the working principle of the explosion-proof actuator 1 is as follows: different control modes can be achieved in the explosion-proof actuator 1 by adjusting the magnetic field strength of the magnet 112 in the permanent magnetic lock 11. When the magnetic field strength of the magnet 112 in the permanent magnetic lock 11 is large enough, the static iron core 111 is more attractive to the moving shaft core 3 than the body force of the moving shaft core 3, and the lock is reliably locked. By receiving the control module 12 or external electrical signals, the electromagnetic coil 114 generates a magnetic field in the same direction as the permanent magnetic field to achieve the purpose of mutual repulsion of the same-direction magnetic field to achieve efficient unlocking; when the magnetic field strength of the magnet 112 in the permanent magnetic lock 11 is small, and the static iron core 111 is less attractive to the moving shaft core 3 than the body force of the moving shaft core 3, the magnetic field generated by the electromagnetic coil 114 can be superimposed on the permanent magnetic field to achieve mutual attraction of the opposite-direction magnetic fields to achieve reliable locking, and when the electromagnetic coil 114 is powered off, the lock is automatically unlocked.

[0060] The electromagnetic gas emergency shut-off valve disclosed in the embodiment of the utility model is introduced in detail above. The principle and implementation mode of the utility model are explained in this article by using specific examples. The description of the above embodiments is only used to help understand the electromagnetic gas emergency shut-off valve of the utility model and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. An explosion-proof actuator for an electromagnetic gas emergency shut-off valve, characterized in that: The explosion-proof actuator includes a permanent magnetic lock component and a control module. The permanent magnetic lock component includes a permanent magnetic lock and a plastic shell wrapped around the permanent magnetic lock by a casting process. The plastic shell also has a accommodating space. The control module is arranged in the accommodating space, and the control module is electrically connected to the permanent magnetic lock for controlling the permanent magnetic lock.

2. The explosion-proof actuator according to claim 1, characterized in that: The control module is used for the on / off, fault diagnosis and / or remote functions of the permanent magnetic lock, and the control module includes a control circuit board; the plastic shell includes a first part and a second part, the first part is covered on the outside of the permanent magnetic lock, the second part is connected to the first part and has the accommodating space, the control module is installed in the accommodating space and is connected to an external device through a first electrical connector passing through the second part and / or is electrically connected to the permanent magnetic lock through a second electrical connector passing through the first part.

3. The explosion-proof actuator according to claim 1, characterized in that: The permanent magnetic lock includes a static iron core, a magnet, a skeleton, an electromagnetic coil, a magnetically conductive shell, and a baffle. The static iron core and the magnet form a permanent magnetic lock component. The skeleton has a central channel. The skeleton and the electromagnetic coil are sleeved on the periphery of the permanent magnetic lock component. The magnetically conductive shell and the baffle are arranged on the outside of the electromagnetic coil. The electromagnetic coil is electrically connected to the control module.

4. The explosion-proof actuator according to claim 3, characterized in that: The permanent magnetic lock component is located at one end of the frame, the magnetic conductive shell is sleeved around the electromagnetic coil and located between the electromagnetic coil and the plastic shell, and the baffle is arranged at one end of the frame away from the permanent magnetic lock component.

5. The explosion-proof actuator according to claim 3, characterized in that: The magnet is an annular magnet and is sleeved on the static iron core, and the static iron core is connected or welded to the magnetic conductive shell; the permanent magnetic lock also includes a magnetic isolation metal piece, and the magnetic isolation metal piece is arranged on the inner wall of the frame.

6. The explosion-proof actuator according to claim 1, characterized in that: The explosion-proof actuator also includes a metal shell, which is fixed to the outside of the plastic shell; the metal shell has a first guide structure, and the plastic shell has a second guide structure that cooperates with the first guide structure, and the metal shell is guided and installed with the plastic shell through the first guide structure and the second guide structure; one of the first guide structure and the second guide structure is a guide protrusion, and the other of the first guide structure and the second guide structure is a guide groove.

7. The explosion-proof actuator according to claim 1, characterized in that: The explosion-proof actuator also includes an induction device, which is arranged in the accommodating space and electrically connected to the control module, and is used to sense the on and off state of the permanent magnetic lock and send an induction signal to the control module; the induction device includes a magnetic induction switch or a magnetic induction circuit.

8. The explosion-proof actuator according to claim 1, characterized in that: The explosion-proof actuator also includes a waterproof structure, the plastic shell includes a main body and a boss structure connected to the main body and arranged around an opening on one side of the central channel of the explosion-proof actuator, the waterproof structure includes a waterproof sealing gasket arranged corresponding to the opening and a fixing member for fixing the waterproof sealing gasket; the fixing member is a retaining spring abutting between the boss structure and the waterproof sealing gasket.

9. An electromagnetic gas emergency shut-off valve, characterized in that: The electromagnetic gas emergency shut-off valve includes a valve opening handle assembly, an explosion-proof actuator as described in any one of claims 1 to 8, a moving shaft core, a movable component, and a main valve body. The valve opening handle assembly is arranged on one side of the explosion-proof actuator and at least partially extends into the central channel of the explosion-proof actuator. The moving shaft core is arranged in the central channel to connect the valve opening handle assembly, and the permanent magnetic lock is wound around the outer periphery of the moving shaft core. The movable component is connected to the moving shaft core. The main valve body includes a fluid inlet channel, a fluid outlet channel, and a connecting channel connected between the fluid inlet channel and the fluid outlet channel. The movable component is arranged in the connecting channel to control the fluid inlet channel and the fluid outlet channel to be connected or closed via the connecting channel under the drive of the moving shaft core when the permanent magnetic lock or the valve opening handle assembly drives the moving shaft core.

10. The electromagnetic gas emergency shut-off valve according to claim 9, characterized in that: The electromagnetic gas emergency shut-off valve also includes a driving member, which is arranged on the main valve body and connected to the movable part, and is used to drive the movable part. The main valve body includes a first valve body and a second valve body, and the first valve body and the second valve body are arranged in sequence. The explosion-proof actuator is fixed on the side of the second valve body away from the first valve body; the valve opening handle assembly includes a handle and a button, and the handle has a through mounting groove. The button is slidably installed in the mounting groove and connected to the moving shaft core. When the electromagnetic gas emergency shut-off valve is turned on, the button protrudes from the mounting groove, and when the electromagnetic gas emergency shut-off valve is closed, the button is hidden in the mounting groove.

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