CN217583195U

CN217583195U - Electric stop valve

Info

Publication number: CN217583195U
Application number: CN202221660773.9U
Authority: CN
Inventors: 王瑞东
Original assignee: Weishi Energy Technology Co Ltd
Current assignee: Weishi Energy Technology Co Ltd
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-10-14
Anticipated expiration: 2032-06-29

Abstract

The utility model belongs to the technical field of the valve, specifically disclose an electric stop valve, this electric stop valve's electric actuator and valve rod subassembly and case subassembly form the driving chain, thereby make the case subassembly can block the stop valve cavity of the main valve body, and then play the effect of stopping the circulation medium, the case subassembly forms sealed vice with the main valve body, it is sealed reliable, electric actuator includes driving motor, gear and first valve rod, driving motor's output and gear connection, driving motor drives the gear and rotates, the lateral wall of first valve rod is equipped with the rack, gear and rack meshing transmission, when the outage of electric execution structure, valve rod subassembly still can continuously provide sufficient sealing force to guarantee the sealing performance of case subassembly, the energy consumption is reduced, the risk after electric stop valve loses the electricity has been avoided simultaneously.

Description

Electric stop valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to an electric stop valve.

Background

The global hydrogen energy industry is in an accelerated development stage, in vehicle-mounted low-temperature liquid gas supply systems, such as LNG, liquid hydrogen and other vehicle-mounted gas supply systems, the cost can be greatly reduced due to liquid storage and transportation, the development direction of hydrogen energy use gradually becomes, the electric stop valve is used as a key valve of a liquid hydrogen vehicle-mounted system gas supply pipeline, the requirement on the sealing performance is higher, if a valve rod is sealed by traditional filling materials, the zero leakage requirement cannot be met, the problem of leakage of a liquid hydrogen medium is easy to occur, and danger is caused.

In addition, current electric stop valve needs the valve rod to continuously provide sufficient sealing force to guarantee the leakproofness of case when sealed, and it is good that the leakproofness of case just can be guaranteed to need supply power always, and on the one hand, the required energy consumption of continuous power supply is higher, and on the other hand just can provide sufficient sealing force during the power supply, and the sealed inefficacy of case after losing power causes danger.

Therefore, an electric shutoff valve is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric stop valve, its compact structure, sealed reliable, and lose the electric back electric stop valve and can keep the normal position, reduce the inefficacy risk, can also energy saving consumed the festival simultaneously.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides an electric stop valve, this electric stop valve includes:

the valve body assembly comprises a main valve body and a connecting pipe, wherein an inlet and an outlet are formed in the main valve body, and the inlet, the outlet and the connecting pipe are communicated through a stop valve chamber;

the valve core assembly is arranged in the stop valve chamber and has a communication position and a blocking position relative to the stop valve chamber, when the valve core assembly is in the communication position, the inlet is communicated with the outlet, and when the valve core assembly is in the blocking position, the inlet is disconnected from the outlet;

the valve rod assembly is arranged in the connecting pipe, and the bottom end of the valve rod assembly is connected with the top end of the valve core assembly;

electric actuator, inside driving motor, gear and the first valve rod of being equipped with of electric actuator, driving motor's output with gear connection, driving motor drives gear revolve, the lateral wall of first valve rod is equipped with the rack, the gear with rack toothing, stretch out the bottom of first valve rod electric actuator with valve rod assembly's top is connected.

Optionally, the valve rod assembly comprises a second valve rod, a valve rod extension pipe and a corrugated pipe, the corrugated pipe is sleeved on the second valve rod, the top end of the second valve rod is connected with the bottom end of the first valve rod, the bottom end of the second valve rod is connected with the top end of the valve rod extension pipe, and the bottom end of the valve rod extension pipe is connected with the top end of the valve core assembly.

Optionally, the electric stop valve includes a valve cover, a top end of the valve cover is connected with a bottom end of the electric actuator, and the connecting pipe is detachably connected with a bottom end of the valve cover through a locking nut.

Optionally, the valve rod assembly comprises an upper flange, the upper flange is sleeved on the second valve rod, and the locking nut compresses the upper flange on the connecting pipe.

Optionally, the top of second valve rod is equipped with first boss, the bottom of first valve rod is equipped with T type draw-in groove, first boss card is established in the T type draw-in groove.

The inner wall of the main valve body is provided with a first bulge and a second bulge, the first bulge and the second bulge form a sealing surface, the valve core assembly comprises a valve core body and a first sealing element arranged at the bottom end of the valve core body, and the first sealing element can be abutted to the sealing surface.

Optionally, an elastic mechanism is arranged between the valve core assembly and the valve rod assembly, the elastic mechanism includes a third valve rod, a spring seat and a spring, the third valve rod penetrates through the spring seat, the top end of the third valve rod is connected with the valve rod assembly, the bottom end of the third valve rod is connected with the valve core assembly, the spring is sleeved on the spring seat, the upper end and the lower end of the spring are respectively abutted to the valve rod assembly and the spring seat, and the bottom end of the spring seat is abutted to the valve core assembly.

Optionally, the bottom of valve rod extension pipe is equipped with the lower flange, the inside first storage tank that is equipped with of lower flange, the top of third valve rod is equipped with the second boss, the second boss sets up in the first storage tank, the inner wall of first storage tank is equipped with annular joint groove, annular joint groove site in the below of second boss, annular joint inslot is equipped with the retaining ring, the retaining ring will the second boss card is established in the first storage tank.

Optionally, the valve core assembly further includes a valve core gland, the valve core gland is connected to the valve core body, a second accommodating groove is formed in the top end of the valve core body, the bottom end of the third valve rod penetrates through the valve core gland, a third boss is arranged at the bottom end of the third valve rod, and the third boss is clamped in the second accommodating groove by the valve core gland.

Optionally, the electric stop valve includes a heat-insulating jacket, the heat-insulating jacket is disposed outside the valve body assembly, and the heat-insulating jacket is connected to the connecting pipe.

The beneficial effects of the utility model are that:

the utility model provides an electric stop valve, this electric stop valve includes the valve body subassembly, the case subassembly, valve rod subassembly and electric actuator, the valve body subassembly includes the main valve body, electric actuator forms the driving chain with valve rod subassembly and case subassembly, thereby make the case subassembly can block the stop valve cavity of the main valve body, and then play the effect of stopping the circulation medium, the case subassembly forms reliable sealed vice with the main valve body, guarantee that sealing performance is good, electric actuator includes driving motor, gear and first valve rod, driving motor's output and gear connection, driving motor drives the gear and rotates, the lateral wall of first valve rod is equipped with the rack, gear and rack meshing transmission, electric actuator need not to supply power all the time, when electric actuator cuts off the power supply, the valve rod subassembly still can continuously provide sufficient sealing force to guarantee the sealing performance of case subassembly, the energy consumption is reduced, the risk after electric stop valve loses the electricity has been avoided simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of an electric stop valve provided in an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a partial enlarged view of the portion B in FIG. 1;

fig. 4 is a schematic structural diagram of a valve body assembly provided in an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a valve stem assembly provided in an embodiment of the present invention.

In the figure:

100. a valve cover; 110. locking the nut; 120. a second seal member; 130. a third seal member;

210. a main valve body; 211. an inlet; 212. an outlet; 213. a first protrusion; 214. a second protrusion; 220. a connecting pipe; 221. a purge port;

310. a valve core body; 320. a first seal member; 330. a valve core gland bush; 340. a fixing member; 341. a spring washer; 342. a flat washer;

410. a second valve stem; 411. a first boss; 420. a valve stem extension tube; 430. a bellows; 440. an upper flange; 450. a lower flange; 451. a first accommodating groove; 452. an annular clamping groove;

500. an electric actuator; 510. a gear; 520. a first valve stem; 521. a rack; 522. a T-shaped clamping groove;

610. a third valve stem; 611. a second boss; 612. a third boss; 620. a spring seat; 630. a spring; 640. a retainer ring;

700. a heat-preserving jacket.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures associated with the present invention are shown in the drawings, not all of them.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to fig. 3, the present embodiment provides an electric stop valve, which includes a valve body assembly, a valve core assembly, a valve rod assembly and an electric actuator 500, a bottom end of the valve rod assembly is connected to a top end of the valve core assembly, a top end of the valve rod assembly is connected to the electric actuator 500, the valve rod assembly and the valve core assembly form a driving chain, the valve rod assembly can be driven by the electric actuator 500 to drive the valve rod assembly to move the valve core assembly upwards or downwards, the valve core assembly can contact the valve body assembly, thereby blocking a circulation medium in the valve body assembly and avoiding leakage of the circulation medium.

Specifically, the valve body assembly in this embodiment includes a main valve body 210 and a connecting pipe 220, the main valve body 210 is provided with an inlet 211 and an outlet 212, the inlet 211, the outlet 212 and the connecting pipe 220 are communicated through a stop valve chamber inside the main valve body 210, the spool assembly is disposed in the stop valve chamber, the spool assembly has a communication position and a blocking position relative to the stop valve chamber, when the spool assembly is in the communication position, the inlet 211 is communicated with the outlet 212, and a flowing medium flows into the stop valve chamber inside the main valve body 210 from the inlet 211 and then flows out of the stop valve chamber from the outlet 212; when the valve core assembly is in the blocking position, the inlet 211 is disconnected from the outlet 212, a reliable sealing pair can be formed between the valve core assembly and the main valve body 210, and the flowing medium is cut off, at the moment, the valve core assembly divides the chamber of the stop valve into a first chamber and a second chamber, the first chamber is communicated with the inlet 211, and the second chamber is communicated with the outlet 212.

The inside driving motor that is equipped with of electric actuator 500, gear 510 and first valve rod 520, driving motor's output is connected with gear 510, driving motor can drive gear 510 and rotate, the lateral wall on the top of first valve rod 520 is equipped with rack 521, gear 510 and rack 521 mesh, electric actuator 500 is stretched out to the bottom of first valve rod 520, and pass valve gap 100 and be connected with the valve rod subassembly top, the valve rod subassembly sets up in connecting pipe 220, when driving motor drive gear 510 rotated, because gear 510 and rack 521 mesh, rack 521 can the up-and-down motion, and then drive the axial up-and-down motion of valve rod subassembly along connecting pipe 220. Electric actuator 500 in this embodiment simple structure, and need not to supply power all the time, when electric actuator cuts off the power supply, driving motor stall, driving motor's output can not take place to rotate this moment, gear 510's rigidity, gear 510 can not take place to overturn, and then rack 521's rigidity, valve rod assembly's rigidity, thereby valve rod assembly still can continuously provide sufficient sealing force and guarantee the sealing performance of case subassembly, the energy consumption is reduced, the risk after electric stop valve loses the electricity has been avoided simultaneously, the reliability is higher.

Further, referring to fig. 4, in order to adapt the electric shutoff valve in this embodiment to a pipeline in which a flowing medium is liquid hydrogen, a purge port 221 is opened on a side wall of the connecting pipe 220, the purge port 221 is communicated with the shutoff valve chamber, and before the inlet 211 and the outlet 212 are communicated with the flowing medium (liquid hydrogen), gas inside the main valve body 210 and the connecting pipe 220 is exhausted through the purge port 221, so that collision and friction between the liquid hydrogen and solid gas condensed inside the connecting pipe 220 are avoided, and the risk of explosion is avoided.

In some embodiments, referring to fig. 3 and 4, a first protrusion 213 and a second protrusion 214 are disposed on an inner wall of the main valve body 210, the first protrusion 213 and the second protrusion 214 form a sealing surface, the valve core assembly is disposed in the main valve body 210, the valve core assembly includes a valve core body 310 and a first sealing member 320 disposed at a bottom end of the valve core body 310, the valve core assembly is driven by the electric actuator 500, so that the valve core assembly can drive the valve core body 310 to move downward, the first sealing member 320 disposed at the bottom end of the valve core body 310 can abut against the sealing surface of the main valve body 210, a sealing pair is formed between the first sealing member 320 and the sealing surface, and the flowing medium is cut off, at this time, the valve core assembly is in a blocking position relative to the stop valve chamber, the stop valve chamber is divided into a first chamber and a second chamber, the first chamber is communicated with the inlet 211, and the second chamber is communicated with the outlet 212, and since the first sealing member 320 adopts a linear sealing structure, an operating force can be reduced as much as possible on the premise that a sealing strength is ensured, thereby reducing a size and a weight of the electric actuator 500.

As an alternative, the first sealing member 320 is fixed at the bottom end of the valve core body 310 through a fixing member 340, a spring washer 341 and a flat washer 342 are further disposed between the fixing member 340 and the valve core body 310, the fixing member 340 can be prevented from being loosened through the spring washer 341, and the first sealing member 320 can be prevented from being damaged by the spring washer 341 and the fixing member 340 through the flat washer 342. In some embodiments, the fixing member 340 may be a bolt, a screw, or the like. Of course, in other embodiments, the fixing element 340 may also be made of other parts as long as the first sealing element 320 can be fixed on the valve core body 310, which is not limited in this embodiment.

Referring to fig. 1 and 5, the valve stem assembly in this embodiment includes a second valve stem 410, a valve stem extension pipe 420 and a bellows 430, the bellows 430 is sleeved on the second valve stem 410, the top end of the second valve stem 410 is connected to the bottom end of the first valve stem 520, the bottom end of the second valve stem 410 is connected to the top end of the valve stem extension pipe 420, and the bottom end of the valve stem extension pipe 420 is connected to the top end of the valve core assembly. Through the setting of bellows 430, can block the contact of valve stem subassembly and circulation medium, guarantee the requirement of electric stop valve ease nature, bellows 430 can also provide axial tensile or compression simultaneously, satisfies the requirement to axial stroke among the electric stop valve opening and closing process.

With continued reference to fig. 1 and 2, the connection pipe 220 in the present embodiment is detachably connected to the bottom end of the valve cap 100 by the locking nut 110, for example, an external thread is formed on an outer wall of the top end of the connection pipe 220, the locking nut 110 is screwed to the connection pipe 220 by the external thread, so that the bottom end of the valve cap 100 is fixed to the connection pipe 220, and the top end of the valve cap 100 is connected to the bottom end of the electric actuator 500.

The valve rod assembly comprises an upper flange 440, the upper flange 440 is sleeved on the second valve rod 410, the upper flange 440 is arranged between the locking nut 110 and the connecting pipe 220, the locking nut 110 is in threaded connection with the connecting pipe 220, and the upper flange 440 can be tightly pressed on the connecting pipe 220 through the locking nut 110, so that the valve rod assembly is fixed. Second sealing members 120 are disposed between the valve cover 100 and the upper flange 440 and between the connection pipe 220 and the upper flange 440, so that the sealing performance of the electric shutoff valve is further ensured, and the escape of a circulating medium is avoided. The top of second valve stem 410 is equipped with first boss 411, and the bottom of first valve stem 520 is equipped with T type draw-in groove 522, and first boss 411 card is established in T type draw-in groove 522 to accomplish the transmission of first valve stem 520 and second valve stem 410 and be connected, realize the transmission of axial force.

With reference to fig. 3, in this embodiment, an elastic mechanism is disposed between the valve core assembly and the valve rod assembly, the elastic mechanism includes a third valve rod 610, a spring seat 620 and a spring 630, the third valve rod 610 passes through the spring seat 620, the top end of the third valve rod 610 is connected to the valve rod assembly, the bottom end of the third valve rod 610 is connected to the valve core assembly, the spring 630 is sleeved on the spring seat 620, the upper and lower ends of the spring 630 are respectively abutted to the valve rod assembly and the spring seat 620, and the bottom end of the spring seat 620 is abutted to the valve core assembly. The sealing force of the valve core assembly is compensated through the arrangement of the elastic mechanism, and a certain pretightening force is provided for the valve core assembly through the downward pressure of the spring 630 on the spring seat 620, so that the first sealing element 320 of the valve core assembly can be tightly pressed on the sealing surface of the main valve body 210, and the sealing is more reliable.

Further, the bottom of valve rod extension pipe 420 is equipped with lower flange 450, the inside first storage tank 451 that is equipped with of lower flange 450, the top of third valve rod 610 is equipped with second boss 611, second boss 611 sets up in first storage tank 451, the inner wall of first storage tank 451 is equipped with annular joint groove 452, annular joint groove 452 is located the below of second boss 611, be equipped with retaining ring 640 in annular joint groove 452, can establish second boss 611 card in first storage tank 451 through retaining ring 640, thereby be connected valve rod assembly and elastic mechanism.

The valve core assembly further comprises a valve core gland 330, the valve core gland 330 comprises a cylindrical portion, an external thread is arranged on the outer wall of the cylindrical portion, a second accommodating groove is formed in the top end of the valve core body 310, an internal thread is arranged on the inner wall of the second accommodating groove, and the external thread and the internal thread can be matched with each other, so that the valve core gland 330 is fixedly connected with the valve core body 310. Further, the bottom end of the third valve rod 610 penetrates through the valve core gland 330, the bottom end of the third valve rod 610 is provided with a third boss 612, after the cylindrical portion of the valve core gland 330 is in threaded connection with the valve core body 310, the third boss 612 can be clamped in the second accommodating groove by the bottom end of the cylindrical portion, so that the connection between the elastic mechanism and the valve core assembly is completed, then the electric actuator 500, the valve rod assembly, the elastic mechanism and the valve core assembly form a complete drive chain, and the valve core assembly can be driven to move up and down by the electric actuator 500.

With reference to fig. 1, the third sealing element 130 is sleeved on the first valve rod 520 in this embodiment, the third sealing element 130 is annular, the inner ring of the third sealing element 130 abuts against the outer wall of the first valve rod 520, the outer ring of the third sealing ring abuts against the inner wall of the valve cover 100, and by means of the third sealing ring, after the corrugated pipe 430 is abnormally broken, uncontrollable leakage of circulating media is avoided, the sealing reliability of the electric stop valve is improved, and the safety performance is good.

As an optional scheme, the electric stop valve in this embodiment further includes a heat-insulating jacket 700, the heat-insulating jacket 700 is disposed outside the valve body assembly, the heat-insulating jacket 700 is connected to the connecting pipe 220, and the heat-insulating jacket 700 can wrap the valve body assembly, so as to prevent heat exchange between a circulating medium inside the valve body assembly and the outside, thereby performing a heat-insulating function. More preferably, the space between the insulating jacket 700 and the connection pipe 220 may be vacuumized to further improve the insulating effect.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements, and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An electric shutoff valve, comprising:

the valve body assembly comprises a main valve body (210) and a connecting pipe (220), an inlet (211) and an outlet (212) are formed in the main valve body (210), and the inlet (211), the outlet (212) and the connecting pipe (220) are communicated through a stop valve chamber;

a spool assembly disposed within the shut-off valve chamber, the spool assembly having a communicating position and a blocking position relative to the shut-off valve chamber, the inlet (211) communicating with the outlet (212) when the spool assembly is in the communicating position, the inlet (211) being out of communication with the outlet (212) when the spool assembly is in the blocking position;

the valve rod assembly is arranged in the connecting pipe (220), and the bottom end of the valve rod assembly is connected with the top end of the valve core assembly;

electric actuator (500), inside driving motor, gear (510) and the first valve rod (520) of being equipped with of electric actuator (500), driving motor's output with gear (510) are connected, driving motor drives gear (510) rotate, the lateral wall of first valve rod (520) is equipped with rack (521), gear (510) with rack (521) meshing, the bottom of first valve rod (520) is stretched out electric actuator (500) with the top of valve rod subassembly is connected.

2. The electric stop valve according to claim 1, characterized in that the valve rod assembly comprises a second valve rod (410), a valve rod extension pipe (420) and a corrugated pipe (430), the corrugated pipe (430) is sleeved on the second valve rod (410), the top end of the second valve rod (410) is connected with the bottom end of the first valve rod (520), the bottom end of the second valve rod (410) is connected with the top end of the valve rod extension pipe (420), and the bottom end of the valve rod extension pipe (420) is connected with the top end of the valve core assembly.

3. The electric stop valve according to claim 2, characterized in that the electric stop valve comprises a valve cover (100), the top end of the valve cover (100) is connected with the bottom end of the electric actuator (500), and the connecting pipe (220) is detachably connected with the bottom end of the valve cover (100) through a lock nut (110).

4. The electrical shut-off valve of claim 3, wherein the valve stem assembly includes an upper flange (440), the upper flange (440) fitting over the second valve stem (410), the locking nut (110) compressing the upper flange (440) against the connector tube (220).

5. The electric stop valve as claimed in claim 2, wherein a first boss (411) is arranged at the top end of the second valve rod (410), a T-shaped clamping groove (522) is arranged at the bottom end of the first valve rod (520), and the first boss (411) is clamped in the T-shaped clamping groove (522).

6. The electric stop valve according to claim 2, wherein the main valve body (210) is provided with a first protrusion (213) and a second protrusion (214) on the inner wall, the first protrusion (213) and the second protrusion (214) form a sealing surface, the spool assembly comprises a spool body (310) and a first sealing member (320) arranged at the bottom end of the spool body (310), and the first sealing member (320) can abut against the sealing surface.

7. The electric stop valve according to claim 6, characterized in that an elastic mechanism is arranged between the valve core assembly and the valve rod assembly, the elastic mechanism comprises a third valve rod (610), a spring seat (620) and a spring (630), the third valve rod (610) passes through the spring seat (620), the top end of the third valve rod (610) is connected with the valve rod assembly, the bottom end of the third valve rod (610) is connected with the valve core assembly, the spring (630) is sleeved on the spring seat (620), the upper end and the lower end of the spring (630) are respectively abutted against the valve rod assembly and the spring seat (620), and the bottom end of the spring seat (620) is abutted against the valve core assembly.

8. The electric stop valve according to claim 7, characterized in that a lower flange (450) is arranged at the bottom end of the valve rod extension pipe (420), a first accommodating groove (451) is formed inside the lower flange (450), a second boss (611) is arranged at the top end of the third valve rod (610), the second boss (611) is arranged in the first accommodating groove (451), an annular clamping groove (452) is arranged on the inner wall of the first accommodating groove (451), the annular clamping groove (452) is located below the second boss (611), a retaining ring (640) is arranged in the annular clamping groove (452), and the second boss (611) is clamped in the first accommodating groove (451) by the retaining ring (640).

9. The electrically actuated stop valve of claim 7, wherein the spool assembly further comprises a spool cover (330), the spool cover (330) is connected to the spool body (310), the top end of the spool body (310) is provided with a second receiving groove, the bottom end of the third valve rod (610) is disposed through the spool cover (330), and the bottom end of the third valve rod (610) is provided with a third boss (612), and the spool cover (330) clamps the third boss (612) in the second receiving groove.

10. The electric shut-off valve according to claim 1, characterized in that it comprises an insulating jacket (700), said insulating jacket (700) being disposed outside said valve body assembly, said insulating jacket (700) being connected to said connection pipe (220).