Valve locking device of stop valve

Abstract

The utility model relates to the field of locking devices, in particular to a stop valve locking device which comprises a valve lock body, a lock beam, a lock arm and a lock cylinder assembly arranged on the valve lock body, a magnetic element and at least one installation clamping groove are arranged on the lock beam, and a passive magnetic induction component is arranged on the valve lock body. The lock beam penetrates through the top of the stop valve and then is arranged on the valve lock body in a drawing and inserting mode, when the lock beam is installed in place, the lock cylinder assembly and an installation clamping groove in the lock beam are mutually clamped, and a magnetic element on the lock beam and a passive magnetic induction element on the valve lock body are mutually inducted. One end of the lock arm is arranged on the valve lock body, the other end of the lock arm penetrates through the base of the stop valve and is fixed to the base of the stop valve, locking can be achieved under the condition that the stop valve is not transformed, and after locking, the stop valve cannot rotate by an angle any more. And the constructor can quickly judge the locking condition of the stop valve through mutual induction conduction of the passive magnetic induction component and the magnetic element.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of locking device, more particularly to a kind of stop valve gate locking device. BACKGROUND

[0002] The stop valve is a kind of valve commonly used in market at present, which is widely used in water, oil, steam and liquefied petroleum gas pipeline.

[0003] In the application process of the current stop valve, in order to prevent unauthorized construction personnel from operating, the stop valve is generally locked, such as the utility model patent with patent number "2018216616888" discloses an instrument valve with locking structure, which needs to modify the structure of the stop valve, and realizes the locking of the stop valve by the way of external padlock. It can be seen that this type of locking method needs to modify the stop valve before locking the stop valve. However, this is very inconvenient for the construction party, and professional valve factory is needed for modification. In addition, whether the current stop valve is locked or not, there is no application state electronic feedback management system, so the construction personnel can only detect on site to know the locking state of the stop valve. Moreover, the current locking method of the stop valve relies only on padlock and locking nut for locking when locking the stop valve. In the case of not unlocking, the stop valve gate can still be rotated by a certain angle. Therefore, it is necessary to provide a stop valve gate locking device to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of stop valve gate locking device to overcome at least one of the defects (deficiency) of the prior art described above.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows: a kind of stop valve gate locking device, including valve lock body, lock beam, lock arm and lock core assembly arranged on valve lock body;

[0006] The lock beam is provided with a magnetic element and at least one mounting slot, and the valve lock body is provided with a passive magnetic induction component;

[0007] The lock beam can be inserted and extracted on the valve lock body after passing through the top of the stop valve. When the lock beam is installed in place, the lock core assembly and the mounting slot on the lock beam are mutually clamped, and the magnetic element on the lock beam and the passive magnetic induction component on the valve lock body are mutually inducted.

[0008] One end of the lock arm is arranged on the valve lock body, and the other end is arranged in the base of the stop valve and fixed with the base of the stop valve, since the lock beam is arranged through the top of the stop valve, and the lock arm is arranged through the base of the stop valve, the stop valve can be better installed and fixed, once the stop valve is locked, the rotation of the stop valve will not occur again, since the magnetic element is arranged on the lock beam, and the passive magnetic induction element is arranged on the valve lock body, the locking state of the stop valve can be quickly judged according to the induction state of the magnetic element and the passive magnetic induction element or the locking position, and the stop valve locking device is suitable for stop valves of different sizes, and does not need to be transformed when used, which is simple and convenient.

[0009] Further, the passive magnetic induction element and the mounting clamping groove are two, the two passive magnetic induction elements are arranged on the valve lock body in sequence from top to bottom along the insertion direction of the lock beam, in actual application, the number of the passive magnetic induction element, the magnetic element and the mounting clamping groove can be set according to the need, which is easily thought by the person skilled in the art.

[0010] Further, it further comprises a pressing block, an adjusting spring, a positioning pin, a mounting connecting plate, a supporting plate and a locking block arranged on the supporting plate.

[0011] The pressing block and the supporting plate are arranged on the valve lock body, and the pressing groove is arranged on the pressing block.

[0012] The locking block is arranged on the valve lock body through the positioning pin, the adjusting spring is sleeved on the positioning pin, and the lock beam and the locking block are pressed together.

[0013] The mounting connecting plate is provided with a limiting clamping block, and the mounting connecting plate and the locking block are engaged with each other through the clamping teeth.

[0014] The lock arm is arranged on the mounting connecting plate, and the pressing groove of the pressing block is clamped on the limiting clamping block of the mounting connecting plate, since the locking block, the pressing block and the supporting plate are fixed on the valve lock body, the locking block, the pressing block and the supporting plate are fixed, and the mounting connecting plate and the locking block are connected through the clamping teeth, so that the mounting connecting plate and the locking block cannot move left and right, in addition, the bottom of the mounting connecting plate is supported by the supporting plate, and the limiting clamping block at the top of the mounting connecting plate is limited by the pressing groove on the pressing block, so that the mounting connecting plate can be firmly connected with the valve lock body.

[0015] Further, the locking block is provided with a groove, and the locking block can be automatically adjusted when the locking block is pressed by the insertion of the lock beam, so that the false locking of the lock beam during insertion is avoided.

[0016] Further, the lock beam is obliquely arranged on the valve lock body, so that the same stop valve locking device can be used to lock different sizes of stop valves.

[0017] Further, the lock arm comprises a first lock arm, a second lock arm and a bolt;

[0018] The first lock arm and the second lock arm are provided with a plurality of bolt holes, and the bolt is fixed in the bolt hole of the second lock arm after passing through the bolt hole of the first lock arm, so that the bolt can be inserted into the corresponding position of the first lock arm and the second lock arm according to the size and position of the base of the stop valve, thereby better locking the base of the stop valve.

[0019] Further, the lock beam is obliquely arranged on the valve lock body, so that the same stop valve locking device can be used to lock different sizes of stop valves.

[0020] Further, the lock core assembly comprises a lock core body, a conversion piece, a spring, a limiting pin and a clamping groove arranged on the limiting pin;

[0021] The lock core body is arranged on the valve lock body;

[0022] The end of the conversion piece is in the shape of "D";

[0023] The first end of the conversion piece is connected with the lock core body, and the end of the conversion piece is clamped in the clamping groove of the limiting pin;

[0024] The spring sleeve is arranged on the limiting pin, and when the construction personnel is authorized, the lock core body can be rotated by inserting the key into the key hole, the conversion piece is connected with the lock core body, so that the conversion piece rotates with the lock core body, the end of the conversion piece is in the shape of "D", when the straight line edge of the "D" shape abuts against the edge of the clamping groove of the limiting pin, the limiting pin is inserted into the mounting clamping groove of the lock beam and clamped and fixed with the lock beam under the action of the spring, when the conversion piece rotates by 90 degrees, the intersection of the straight line edge and the arc edge of the "D" shape structure at the end of the conversion piece abuts against the edge of the clamping groove of the limiting pin, and the limiting pin exits the mounting clamping groove to realize the separation of the limiting pin and the lock beam.

[0025] Further, the passive magnetic induction component is a reed switch or a proximity switch, and the magnetic element is a magnet, when the passive magnetic induction component is a reed switch, when the magnetic element is close to the reed switch, two reed switches are magnetized to generate magnetic fields of different polarities, when the magnetic element is attached to the reed switch, the two reed switches are attracted together, so that conduction is realized, when the magnetic element is separated from the reed switch, the two reed switches are gradually demagnetized and disconnected, so that disconnection is realized, when the passive magnetic induction component is a proximity switch, if the magnetic element is attached to the proximity switch, the proximity switch can detect the approach of the magnetic element and trigger the proximity switch to open, when the magnetic element is separated from the proximity switch, the proximity switch is closed, in actual application, the passive magnetic induction component and the magnetic element can also be replaced by other similar components, which are all within the protection scope of the utility model.

[0026] Further, the valve lock body 1 is provided with a PCB fixing plate, the PCB fixing plate is provided with an MCU controller and an NFC antenna, the NFC antenna and the passive magnetic induction component are connected with the MCU controller, the MCU controller can transmit the induction condition of the passive magnetic induction component and the magnetic element to the outside through the NFC antenna, so that people can make a judgment on the locking condition of the stop valve in real time, in the utility model, the model of the MCU controller is CH444G.

[0027] Compared with the prior art, the utility model technical scheme has the beneficial effects that:

[0028] The utility model discloses a stop valve lock device, because the lock beam is by the top of stop valve and passes, and the lock arm is by the base of stop valve and passes, can therefore better installation and fixed of stop valve, and stop valve once lock, will not appear the condition of rotation again, and because setting up magnetic element on the lock beam, setting up passive magnetic induction element on the lock body of valve, through the induction situation of magnetic element and passive magnetic induction element or its lock position, people can fast judgement of the locking state of stop valve, and this stop valve lock device is suitable for the stop valve of different size and uses, when using, need not to transform the stop valve, simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the structure schematic drawing of the stop valve lock device of the utility model being installed on the stop valve, but being in the structure schematic drawing of the stop valve of not locking.

[0030] Figure 2 It is the structure schematic drawing of the stop valve lock device of the utility model being installed on the stop valve, and locking the structure schematic drawing of the stop valve.

[0031] Figure 3 It is the structure schematic drawing of the stop valve lock device of the utility model being in the structure schematic drawing of not locking the stop valve.

[0032] Figure 4 It is the structure schematic drawing of the stop valve lock device of the utility model being in locking the stop valve.

[0033] Figure 5 It is the first internal structure schematic drawing of the stop valve lock device of the utility model being in the state of not locking the stop valve.

[0034] Figure 6 It is the second internal structure schematic drawing of the stop valve lock device of the utility model being in the state of not locking the stop valve.

[0035] Figure 7 It is the third internal structure schematic drawing of the stop valve lock device of the utility model being in the state of not locking the stop valve.

[0036] Figure 8 It is the fourth internal structure schematic drawing of the stop valve lock device of the utility model being in the state of not locking the stop valve.

[0037] Figure 9 It is the first internal structure schematic drawing of the stop valve lock device of the utility model being in locking the stop valve.

[0038] Figure 10 It is the second internal structure schematic drawing of the stop valve lock device of the utility model being in locking the stop valve.

[0039] Figure 11 Figure 3 is the third internal structure schematic view of the valve locking device of the utility model in the locking of the stop valve state.

[0040] Figure 12 Figure 4 is the fourth internal structure schematic view of the valve locking device of the utility model in the locking of the stop valve state.

[0041] Figure 13 Figure 5 is the structure schematic view of the MCU controller of the utility model being arranged in the valve lock body.

[0042] Figure 14 Figure 6 is the structure schematic view of the NFC antenna of the utility model being arranged in the valve lock body.

[0043] In the figure, 1 is a valve lock body, 2 is a lock beam, 3 is a lock arm, 4 is a lock core assembly, 5 is a magnetic element, 6 is a mounting clamping groove, 7 is a passive magnetic induction component, 8 is a stop valve, 9 is a base, 10 is a pressing block, 11 is an adjusting spring, 12 is a positioning pin, 13 is a mounting connecting plate, 14 is a supporting plate, 15 is a locking block, 16 is a pressing groove, 17 is a limiting clamping block, 18 is a clamping tooth, 19 is a groove body, 20 is a first lock arm, 21 is a second lock arm, 22 is a bolt, 23 is a bolt hole, 24 is an insertion state identification ring, 25 is a lock core body, 26 is a conversion piece, 27 is a spring, 28 is a limiting pin, 29 is a clamping groove, 30 is a PCB fixing plate, 31 is an MCU controller, and 32 is an NFC antenna. DETAILED DESCRIPTION

[0044] The drawings are only used for illustrative description, and cannot be understood as the limitation of the patent; in order to better illustrate the embodiment, some components of the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings can be omitted.

[0045] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, and can be said to be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. The technical scheme of the utility model is further explained below in combination with the drawings and examples.

[0046] As Figures 1-4As shown, a kind of stop valve valve locking device, including valve lock body 1, lock beam 2, lock arm 3 and lock core assembly 4 arranged on valve lock body 1;Lock beam 2 is equipped with magnetic element 5 and at least one installation card slot 6, and valve lock body 1 is equipped with passive magnetic induction component 7;Lock beam 2 can be inserted and extracted after passing through the top of stop valve 8 and being arranged on valve lock body 1, when lock beam 2 is installed in place, lock core assembly 4 and installation card slot 6 on lock beam 2 are mutually clamped, and magnetic element 5 on lock beam 2 and passive magnetic induction component 7 on valve lock body 1 are mutually inducted;Lock arm 3 is arranged on valve lock body 1 at one end, and the other end passes through the base 9 of stop valve 8 and is mutually fixed with the base 9 of stop valve 8, since lock beam 2 is passed through the top of stop valve 8, and lock arm 3 is passed through the base 9 of stop valve 8, therefore, stop valve 8 can be better installed and fixed, and once stop valve 8 valve is locked, it will not appear rotating condition, and since magnetic element 5 is arranged on lock beam 2, and passive magnetic induction component 7 is arranged on valve lock body 1, people can quickly judge the locking state of stop valve 8 by the induction condition of magnetic element 5 and passive magnetic induction component 7 or the locking position thereof, and the stop valve valve locking device is suitable for different sizes of stop valve 8, and when being used, stop valve 8 does not need to be transformed, and it is simple and convenient, in the utility model, passive magnetic induction component 7 and installation card slot 6 are two, two passive magnetic induction components 7 are sequentially arranged on valve lock body 1 along the insertion direction of lock beam 2 from top to bottom, in actual application, the number of passive magnetic induction component 7, magnetic element 5 and installation card slot 6 can be set according to needs, and they are easily thought by the person skilled in the art.

[0047] As Figures 5-8As shown, it further comprises a pressing block 10, an adjusting spring 11, a positioning pin 12, a mounting connecting plate 13, a supporting plate 14 and a locking block 15 arranged on the supporting plate 14; the pressing block 10 and the supporting plate 14 are both arranged on the valve lock body 1, the pressing block 10 is provided with a pressing groove 16; the locking block 15 is arranged on the valve lock body 1 through the positioning pin 12, the adjusting spring 11 is sleeved on the positioning pin 12, the locking beam 2 and the locking block 15 are pressed together; the mounting connecting plate 13 is provided with a limiting clamping block 17, the mounting connecting plate 13 and the locking block 15 are engaged with each other through a clamping tooth 18; the locking arm 3 is arranged on the mounting connecting plate 13, the pressing groove 16 of the pressing block 10 is clamped on the limiting clamping block 17 of the mounting connecting plate 13; since the locking block 15, the pressing block 10 and the supporting plate 14 are all fixed on the valve lock body 1, the locking block 15, the pressing block 10 and the supporting plate 14 are fixed, the mounting connecting plate 13 and the locking block 15 are connected through the clamping tooth 18, so that the mounting connecting plate 13 and the locking block 15 cannot move left and right, in addition, the bottom of the mounting connecting plate 13 is supported by the supporting plate 14, and the limiting clamping block 17 on the top of the mounting connecting plate 13 is limited by the pressing groove 16 on the pressing block 10, so that the mounting connecting plate 13 can be firmly connected with the valve lock body 1.

[0048] As Figures 9-12As shown, the locking block 15 is provided with a groove 19, through the setting of the groove 19, the locking block 15 can be automatically adjusted when being pressed by the insertion of the lock beam 2, avoiding the false locking condition caused by the difficulty of insertion of the lock beam 2, wherein the lock beam 2 is inclined on the valve lock body 1, thus ensuring that the same stop valve locking device can be used to lock the stop valve 8 of different sizes, wherein the lock arm 3 comprises a first lock arm 20, a second lock arm 21 and a bolt 22; the first lock arm 20 and the second lock arm 21 are provided with a plurality of bolt holes 23, the bolt 22 passes through the bolt hole 23 on the first lock arm 20 and is fixed on the bolt hole 23 of the second lock arm 21, in the utility model, the first lock arm 20 is connected with the mounting connecting plate 13, since the first lock arm 20 and the second lock arm 21 are provided with a plurality of bolt holes 23, thus in actual application, the bolt 22 can be inserted in the corresponding position of the first lock arm 20 and the second lock arm 21 according to the size and position of the base 9 of the stop valve 8, thereby better locking the base 9 of the stop valve 8, wherein the lock beam 2 is provided with an insertion state identification ring 24, in the utility model, the insertion state identification ring 24 is two, the lower insertion state identification ring 24 is green, and the upper insertion state identification ring 24 is red, when the mounting clamping groove 6 at the bottom of the lock beam 2 is clamped with the lock cylinder assembly 4, at this time, the passive magnetic induction element 7 on the valve lock body 1 detects the magnetic element 5 on the lock beam 2, the green insertion state identification ring 24 is also flush with the valve lock body 1, when the lock cylinder assembly 4 is rotated and separated from the mounting clamping groove 6 at the bottom of the lock beam 2, at this time, the lock beam 2 can continue to be inserted downward, when the lock beam 2 is inserted in place, the mounting clamping groove 6 on the lock beam 2 is clamped with the lock cylinder assembly 4 again, at this time, the passive magnetic induction element 7 on the valve lock body 1 detects the magnetic element 5 on the lock beam 2, the red insertion state identification ring 24 is also flush with the valve lock body 1, thus, through the conduction of the passive magnetic induction element 7 and the magnetic element 5 and the position of the insertion state identification ring 24 on the lock beam 2, the locking state of the lock beam 2 can be judged by the construction personnel.

[0049] As Figures 13-14As shown, the lock cylinder assembly 4 comprises a lock cylinder body 25, a conversion piece 26, a spring 27, a limiting pin 28 and a clamping groove 29 arranged on the limiting pin 28; the lock cylinder body 25 is arranged on the valve lock body 1; the tail end of the conversion piece 26 is in the shape of a "D"; the head end of the conversion piece 26 is connected with the lock cylinder body 25, and the tail end of the conversion piece 26 is clamped on the clamping groove 29 of the limiting pin 28; the spring 27 is sleeved on the limiting pin 28; when the construction personnel is authorized, the lock cylinder body 25 can be rotated by inserting a key into the key hole, and since the conversion piece 26 is connected with the lock cylinder body 25, the conversion piece 26 will also rotate with the lock cylinder body 25, and since the tail end of the conversion piece 26 is in the shape of a "D", when the straight line edge of the "D" shape is in abutment with the edge of the clamping groove 29 of the limiting pin 28, at this time the limiting pin 28 is inserted into the mounting clamping groove 6 of the lock beam 2 under the action of the spring 27 and is clamped and fixed with the lock beam 2, and when the conversion piece 26 is rotated by 90 degrees, at this time the intersection of the straight line edge and the arc edge of the "D" shape structure at the tail end of the conversion piece 26 is in abutment with the edge of the clamping groove 29 of the limiting pin 28, and the limiting pin 28 exits the mounting clamping groove 6 to realize the separation of the limiting pin 28 and the lock beam 2; in the utility model, the passive magnetic induction element 7 is a reed switch or a proximity switch, and the magnetic element 5 is a magnet; when the passive magnetic induction element 7 is a reed switch, when the magnetic element 5 is close to the reed switch, the two spring leaves of the reed switch are magnetized to generate magnetic fields of different polarities; when the magnetic element 5 is attached to the reed switch, the two spring leaves are attracted together, so that conduction is realized; when the magnetic element 5 is separated from the reed switch, the two spring leaves gradually demagnetize and disconnect, so that disconnection is realized; when the passive magnetic induction element 7 is a proximity switch, if the magnetic element 5 is attached to the proximity switch, the proximity switch can detect the approach of the magnetic element 5 to trigger the proximity switch to open; when the magnetic element 5 is separated from the proximity switch, the proximity switch is closed; in actual application, the passive magnetic induction element 7 and the magnetic element 5 can also be replaced by other similar elements, which are all within the protection scope of the utility model; in the utility model, the PCB fixing plate 30 is arranged in the valve lock body 1, the MCU controller 31 and the NFC antenna 32 are arranged on the PCB fixing plate 30, the NFC antenna 32 and the passive magnetic induction element 7 are connected with the MCU controller 31, and the MCU controller 31 can transmit the induction conditions of the passive magnetic induction element 7 and the magnetic element 5 to the outside through the NFC antenna 32, so that people can judge the locking condition of the stop valve 8 in real time.

[0050] Embodiment

[0051] In the embodiment, the two insertion state identification rings are green and red, when the mounting clamping groove at the bottom of the lock beam is clamped with the lock cylinder assembly, the passive magnetic induction element on the valve lock body detects the magnetic element on the lock beam, and the green insertion state identification ring is flush with the valve lock body, when the lock cylinder assembly is rotated and separated from the mounting clamping groove at the bottom of the lock beam, the lock beam can continue to be inserted, when the lock beam is inserted in place, the mounting clamping groove above the lock beam is clamped with the lock cylinder assembly again, the passive magnetic induction element on the valve lock body detects the magnetic element on the lock beam, and the red insertion state identification ring is flush with the valve lock body, therefore, the locking state of the lock beam can be judged by the on-off state of the passive magnetic induction element and the magnetic element and the position of the insertion state identification ring arranged on the lock beam.

[0052] In addition, because the lock beam is inclinedly arranged on the valve lock body, different sizes of stop valves can be locked by the same stop valve locking device, and because the groove is arranged on the locking block, the locking block can be automatically adjusted when the locking block is pressed by the lock beam, so that the false locking caused by the difficulty in inserting the lock beam is avoided.

[0053] In the embodiment, the lock beam passes through the top of the stop valve to lock the valve, and the lock arm passes through the bottom of the stop valve and is fixed with the bottom of the stop valve, so that the stop valve can be better installed and fixed, the stop valve cannot be rotated after being locked, and the stop valve does not need to be modified during use.

[0054] In the drawings, the position relationship is only used for example description, and cannot be understood as a limitation of the patent; obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation of the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, all the embodiments cannot be exhausted. Any modification, equivalent replacement and improvement made in the spirit and principle of the utility model should be included in the protection scope of the utility model claims.

Claims

1. A valve locking device of a stop valve, comprising a valve lock body, a lock beam, a lock arm and a lock cylinder assembly arranged on the valve lock body, characterized in that: the lock beam is provided with a magnetic element and at least one mounting slot, and the valve lock body is provided with a passive magnetic induction element; the lock beam is arranged to be inserted and extracted on the valve lock body after passing through the top of the stop valve, the lock cylinder assembly is arranged to be clamped with the mounting slot on the lock beam when the lock beam is installed in place, and the magnetic element on the lock beam is arranged to be inductively coupled with the passive magnetic induction element on the valve lock body; one end of the lock arm is arranged on the valve lock body, and the other end of the lock arm is arranged to pass through the base of the stop valve and is fixed with the base of the stop valve. The passive magnetic induction element and the mounting slot are both two, and the two passive magnetic induction elements are arranged on the valve lock body in sequence from top to bottom along the insertion direction of the lock beam. Further comprising a pressing block, an adjusting spring, a positioning pin, a mounting connecting plate, a supporting plate and a locking block arranged on the supporting plate; The pressing block and the supporting plate are arranged on the valve lock body, and the pressing block is provided with a pressing groove; 2. The shutoff valve latching device of claim 1, wherein: The locking block is arranged on the valve lock body through the positioning pin, the adjusting spring is sleeved on the positioning pin, and the lock beam is arranged to be pressed with the locking block; 3. The shutoff valve latching device of claim 1, wherein: The mounting connecting plate is provided with a limiting block, and the mounting connecting plate is arranged to be engaged with the locking block through a clamping tooth; The lock arm is arranged on the mounting connecting plate, and the pressing groove of the pressing block is arranged to be clamped on the limiting block of the mounting connecting plate. The locking block is provided with a groove. The lock beam is arranged to be inclined on the valve lock body. The lock arm comprises a first lock arm, a second lock arm and a plug; 4. The shutoff valve latching device of claim 3, wherein: The first lock arm and the second lock arm are provided with a plurality of plug holes, and the plug is arranged to be fixed on the plug hole of the second lock arm after passing through the plug hole of the first lock arm.

5. The shutoff valve latching device of claim 1, wherein: The lock beam is provided with an insertion state identification ring.

6. The shutoff valve latching device of claim 1, wherein: The lock cylinder assembly comprises a lock cylinder body, a conversion piece, a spring, a limiting pin and a clamping groove arranged on the limiting pin; The lock cylinder body is arranged on the valve lock body; 7. The shutoff valve latching device of claim 1, wherein: The end of the conversion piece is in the shape of "D"; 8. The shutoff valve latching device of claim 1, wherein: The first end of the conversion piece is connected with the lock cylinder body, and the end of the conversion piece is arranged to be clamped on the clamping groove of the limiting pin; The spring is sleeved on the limiting pin. The passive magnetic induction element is a reed switch or a proximity switch, and the magnetic element is a magnet. The valve lock body is provided with a PCB fixing plate, the PCB fixing plate is provided with an MCU controller and an NFC antenna, and the NFC antenna and the passive magnetic induction element are connected with the MCU controller. ​ 9. The shutoff valve latching device of claim 1, wherein: ​ 10. The shutoff valve latching device of claim 1, wherein: ​

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