High-reliability vertical normally-closed electromagnetic gas emergency cut-off valve

Abstract

The utility model provides a high-reliability vertical normally-closed electromagnetic type gas emergency cut-off valve which comprises a valve body, a valve cover arranged on the valve body, an electromagnetic air cylinder arranged above the valve cover, a valve column arranged below a piston rod of the electromagnetic air cylinder, a gas inlet cavity, a gas outlet cavity and a partition plate arranged in the valve body, and an installation hole formed in the partition plate. A normally-closed valve element is arranged on the mounting hole and comprises a core shell with an inner cavity formed in the bottom face and a core cover arranged on the bottom face of the core shell, a guide shaft hole and an upper air outlet hole are formed in the top face of the core shell, a lower air outlet hole is formed in the core cover, a movable core shaft with the top connected with the valve column is arranged on the guide shaft hole in a penetrating mode, and a movable core plate is arranged in the inner cavity in a sliding mode. A middle vent hole is formed in the movable core plate, a valve closing plug connected with the lower air inlet hole in an inserted mode is arranged on the bottom face of the movable core plate, and a valve closing spring is arranged between the top face of the movable core plate and the top wall of the inner cavity. The high-reliability vertical normally-closed electromagnetic type gas emergency cut-off valve can be automatically opened and closed, and the labor intensity of workers can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of a gas emergency cut-off valve, in particular to a high-reliability vertical normally closed electromagnetic gas emergency cut-off valve. Background Art

[0002] Gas valves are generally used on natural gas pipelines to control the on and off of natural gas pipelines. In daily life, gas alarms are generally installed on natural gas pipelines. When a gas leak occurs in the pipeline, the gas alarm can generate an alarm signal to notify people to close the gas valve or stay away from the leakage area. However, when no one is around, if the gas valve is not closed for a long time, the concentration of the leaked gas may reach the explosion limit, causing a gas explosion accident. In addition, when the user does not hear the alarm signal, the leaked gas may cause gas poisoning to the user, endangering human health.

[0003] Cut-off valves are widely used in industrial manufacturing industries such as chemical and petroleum, especially in pipelines that require the transportation of special gases such as oil and natural gas. The gas emergency cut-off valve is a safety device used in gas transmission pipelines. It is mainly installed at the outlet of the gas storage tank pipeline. It can be quickly cut off in an emergency. In the event of equipment failure, corrosion damage, seal failure, leakage, or emergency, emergency cut-off can be used to avoid accidents and other safety issues.

[0004] The Chinese patent with the existing authorization announcement number CN215806322U discloses a gas device with an emergency shut-off valve, including a pipeline, a valve body, a valve core, a locking rod plate, a valve column, a spring frame A, an airbag, a guide plate, and a shut-off mechanism. The valve body is located in the pipeline, a valve core is arranged on the upper side of the valve body, a locking rod plate is welded on the upper side of the valve core, a valve column is welded on the upper side of the locking rod plate, the valve column is located on the inner side of the pipeline, a guide plate is welded on the outer side of the valve column, a spring frame A is sleeved on the outer side of the valve column, one side of the spring frame A is welded on the upper side of the locking rod plate, the other side of the spring frame A is welded on the inner side of the pipeline, an airbag is sleeved on the outer side of the spring frame A, the airbag is glued to the outer side of the locking rod plate by glue, and the other side of the airbag is glued to the inner side of the pipeline by glue;

[0005] The cutting mechanism includes a spring frame B, a guide plate, a column, a pressure plate, a clamping rod, and a spring frame C. A guide plate is arranged on the upper side of the pipeline, and a groove, a clamping groove and a slide groove are respectively opened in the guide plate. A column is arranged in the groove, and the column is welded to the upper side of the pipeline. A through hole is opened in the column, and a clamping rod is arranged in the through hole. A spring frame C is mounted on the outside of the clamping rod, one side of the spring frame C is welded to the inside of the clamping rod, and the other side of the spring frame C is welded to the outside of the column. A pressure plate is welded to the outside of the clamping rod, and the pressure plate is an "L"-shaped structure. The pressure plate is located in the clamping groove, a spring frame B is welded on the lower side of the guide plate, and the other side of the spring frame B is welded to the upper side of the pipeline. The spring frame B is wrapped around the outside of the valve column, and the valve column is a sliding structure in the slide groove.

[0006] When the gas equipment with emergency shut-off valve is in use, after the gas enters, the gas pressure of the gas pushes the valve stem and the valve core upward, so that the gas can flow out through the other side, so that the gas can be transported and used. After the gas is cut off, the valve stem and the valve core are recovered by the elastic force of the spring frame A and restored to their original positions. When the operator finds that there is a gas leak inside the overall device according to the external gas alarm, the operator only needs to press the pressure plate inward with both hands. When the pressure plate moves inward to be parallel to the inner groove of the guide plate, the guide plate moves downward by the elastic force of the spring frame C, and the guide plate moves downward during the downward movement. The inner guide plate is moved downward to move the valve column downward. The downward movement of the valve column drives the valve core to support the valve body to complete the emergency cut-off, thereby cutting off the use of gas, which is convenient for the operator to quickly cut off the gas; after the gas equipment is repaired and leaks, the operator presses the pressure plate inward, and then moves the guide plate up to make the pressure plate and the groove in the guide plate spliced. At this time, the clamping rod is driven by the elastic force of the spring frame B to move the pressure plate outward, so that the pressure plate and the groove are locked, and the equipment resumes normal use; in the case of serious gas leakage, the internal air pressure of the device is reduced, and the valve core moves downward under the elastic force of the spring frame A, thereby automatically cutting off the gas.

[0007] The above-mentioned prior art solutions have the following defects: the gas equipment with the emergency shut-off valve needs to be opened and closed manually by workers, which increases the labor intensity of the workers. Utility Model Content

[0008] The problem to be solved by the utility model is to provide a highly reliable vertical normally closed electromagnetic gas emergency shut-off valve in view of the above-mentioned deficiencies existing in the prior art, which solves the problem of high labor intensity existing in the prior art.

[0009] The above utility model object of the utility model is achieved through the following technical solutions: a highly reliable vertical normally closed electromagnetic gas emergency shut-off valve, comprising a valve body, a valve cover arranged on the valve body, an electromagnetic cylinder is arranged above the valve cover, a valve column penetrating the valve cover is arranged below the piston rod of the electromagnetic cylinder, an air inlet cavity, an air outlet cavity and a partition between the air inlet cavity and the air outlet cavity are arranged in the valve body, a mounting hole is opened on the partition, a normally closed valve core is arranged on the mounting hole, and the normally closed valve core includes a valve body and a valve body connected to the mounting hole. A core shell which is plug-in and has an inner cavity on the bottom surface, and a core cover arranged on the bottom surface of the core shell, a guide shaft hole and an upper air outlet hole are opened on the top surface of the core shell, a lower air outlet hole is opened on the core cover, a movable core shaft connected to the valve column at the top is passed through the guide shaft hole, a movable core plate which is coaxially connected to the movable core shaft is slidably arranged in the inner cavity, a middle air hole is opened on the movable core plate, a valve closing plug which is plugged with the lower air inlet hole is arranged on the bottom surface of the movable core plate, and a valve closing spring is arranged between the top surface of the movable core plate and the top wall of the inner cavity.

[0010] The utility model is further configured as follows: the cross section of the guide shaft hole is a regular hexagon, and the cross section of the movable mandrel is a regular hexagon.

[0011] The utility model is further configured as follows: a column connection platform is arranged on the top of the movable core shaft, and a column connection threaded hole which is threadedly connected to the bottom of the valve column is opened on the top surface of the column connection platform.

[0012] The utility model is further configured as follows: a mounting plate is arranged on the top of the outer side wall of the core shell, the bottom surface of the mounting plate abuts against the top surface of the flat portion of the partition, and the mounting plate is screwed to the top surface of the partition.

[0013] The utility model is further configured as follows: a valve sealing groove is opened on the top surface of the valve body, a convex ring embedded in the valve sealing groove is arranged on the bottom surface of the valve cover, and a valve sealing ring embedded in the valve sealing groove is arranged on the bottom surface of the convex ring.

[0014] The utility model is further configured as follows: a plurality of lower through holes are opened on the top surface of the valve body, a plurality of upper through holes aligned with the lower through holes are opened on the bottom surface of the valve cover, valve locking screws are passed through the upper and lower through holes, and the valve locking screws pass through the lower and upper through holes in sequence and are threadedly connected with valve locking nuts.

[0015] The utility model is further configured as follows: a cylinder frame is arranged between the valve cover and the electromagnetic cylinder, the cylinder frame includes a bottom plate arranged on the top surface of the valve cover, a vertical rod arranged on the top surface of the bottom plate, and a top plate arranged on the top of the vertical rod; the electromagnetic cylinder is arranged on the top surface of the top plate; the piston rod of the electromagnetic cylinder passes through the top plate; and the valve column passes through the bottom plate.

[0016] The utility model is further configured as follows: an upper column hole, an opening, a column sealing groove, and a lower column hole are sequentially opened on the top surface of the valve cover downward; a plurality of column sealing rings sleeved on the valve column are embedded in the column sealing groove; a pressing ring block for pressing and fixing the column sealing ring in the column sealing groove is arranged in the opening; a middle column hole is opened in the middle of the pressing ring block; the valve column passes through the bottom plate, the upper column hole, the middle column hole, the column sealing groove, and the lower column hole in sequence.

[0017] The utility model is further configured as follows: a locking rod frame is arranged on the outer side wall of the valve cover, the locking rod frame includes two locking rod plates fixedly connected to the outer side wall of the valve cover, each of the locking rod plates is provided with an outer locking rod hole, a locking block screw is passed through the through hole, an inner locking rod hole aligned with the outer locking rod hole is formed at the bottom of the locking block screw, a locking rod pin is passed through the outer locking rod hole and the inner locking rod hole, a locking block nut is threadedly connected to the top of the locking block screw after passing through the through hole, a locking block washer is sleeved on the locking block screw, and the locking block washer is located between the locking block nut and the top surface of the pressure ring block.

[0018] To sum up, the beneficial technical effects of the utility model are as follows: the high-reliability vertical normally closed electromagnetic gas emergency shut-off valve is in a normally closed state. When the gas needs to be loaded or unloaded, the high-reliability vertical normally closed electromagnetic gas emergency shut-off valve can be automatically opened. After the loading or unloading work is completed, the high-reliability vertical normally closed electromagnetic gas emergency shut-off valve can be automatically closed, which is beneficial to reduce the labor intensity of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a high-reliability vertical normally closed electromagnetic gas emergency shut-off valve in the utility model;

[0020] Figure 2 It is a partial schematic diagram of the high-reliability vertical normally closed electromagnetic gas emergency shut-off valve in the utility model;

[0021] Figure 3 It is a cross-sectional structural diagram of the normally closed valve core in the utility model;

[0022] Figure 4 It is a schematic diagram of the explosion structure of the normally closed valve core in the utility model;

[0023] Figure 5 It is a structural schematic diagram of the valve cover in the utility model.

[0024] In the above drawings: 1, valve body; 2, valve cover; 3, air inlet cavity; 4, air outlet cavity; 5, partition; 6, mounting hole; 7, normally closed valve core; 71, core shell; 72, core cover; 8, mounting plate; 9, inner cavity; 10, upper air outlet hole; 11, lower air inlet hole; 12, guide shaft hole; 13, movable core shaft; 14, column connection platform; 15, column connection threaded hole; 16, movable core plate; 17, middle vent hole; 18, valve closing plug; 19, valve closing spring; 20, lower through hole; 21, upper through hole; 22, valve locking screw; 23, valve locking nut; 24, valve sealing groove; 25. convex ring; 26. valve sealing ring; 27. upper column hole; 28. opening; 29. ​​column sealing groove; 30. column sealing ring; 31. lower column hole; 32. pressure ring block; 33. through hole; 34. middle column hole; 35. locking rod frame; 351. locking rod plate; 36. outer locking rod hole; 37. locking block screw; 38. inner locking rod hole; 39. locking rod pin; 40. locking block nut; 41. locking block gasket; 42. cylinder frame; 421. bottom plate; 422. vertical rod; 423. top plate; 43. electromagnetic cylinder; 431. piston rod; 44. valve column. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figure 1 As shown, the utility model provides a high-reliability vertical normally closed electromagnetic gas emergency shut-off valve, comprising a valve body 1 and a valve cover 2 arranged on the valve body 1.

[0027] like Figure 2 and 3 As shown, an air inlet cavity 3, an air outlet cavity 4 and a partition 5 located between the air inlet cavity 3 and the air outlet cavity 4 are provided in the valve body 1, a mounting hole 6 is opened on the top surface of the flat part of the partition 5, a normally closed valve core 7 is inserted in the mounting hole 6, and the normally closed valve core 7 includes a core shell 71 and a core cover 72.

[0028] like Figure 2 and 3 As shown, the core shell 71 is cylindrical, and the core shell 71 is plugged into the mounting hole 6. The top of the outer wall of the core shell 71 is fixedly connected with a mounting plate 8, the bottom surface of the mounting plate 8 is against the top surface of the flat part of the partition 5, and the mounting plate 8 is screwed to the top surface of the partition 5.

[0029] like Figure 2 and 3 As shown, the bottom surface of the core shell 71 is provided with an inner cavity 9, and the cross section of the inner cavity 9 is circular. The top surface of the core shell 71 is provided with three upper air outlet holes 10 at equal distances from the circumference, and the cross section of the upper air outlet holes 10 is fan-shaped. The bottom surface of the core shell 71 is screwed with a core cover 72, which closes the opening at the lower part of the inner cavity 9, and the core cover 72 is provided with three lower air inlet holes 11, which are distributed at equal distances from the circumference, and the cross section of the lower air inlet holes 11 is fan-shaped.

[0030] like Figure 3 and 4 As shown, a guide shaft hole 12 is provided at the center of the top surface of the core shell 71, and the cross section of the guide shaft hole 12 is a regular hexagon. A movable mandrel 13 is provided at the center of the inner cavity 9, and the movable mandrel 13 passes through the guide shaft hole 12, and the cross section of the movable mandrel 13 is a regular hexagon. The movable mandrel 13 and the guide shaft hole 12 are slidably matched, so when the movable mandrel 13 performs up and down reciprocating linear motion, the movable mandrel 13 is restricted from rotating. A column receiving platform 14 is fixedly connected to the top of the movable mandrel 13, and the cross section of the column receiving platform 14 is circular, and a column receiving threaded hole 15 is provided on the top surface of the column receiving platform 14.

[0031] like Figure 3 and 4 As shown, the bottom of the movable core shaft 13 is coaxially fixedly connected with a movable core plate 16, the cross section of the movable core plate 16 is circular, the movable core plate 16 is slidably matched with the inner cavity 9 of the core shell 71, and three middle air holes 17 are opened through the movable core plate 16, the three middle air holes 17 are equidistantly distributed around the circumference, and the cross section of the middle air hole 17 is fan-shaped.

[0032] like Figure 3 and4 As shown, a plurality of valve closing plugs 18 which are plugged into the lower air inlet hole 11 are fixedly connected to the end surface of the movable core plate 16 facing the lower air inlet hole 11, and a valve closing spring 19 is sleeved on the movable core shaft 13. One end of the valve closing spring 19 abuts against the top wall of the inner cavity 9, and the other end abuts against the top surface of the movable core plate 16. The valve closing spring 19 is used to push the movable core plate 16 downward, thereby keeping the valve closing plug 18 inserted into the lower air inlet hole 11, so that the normally closed valve core 7 can maintain a normally closed state.

[0033] like Figure 2 As shown, a plurality of lower through holes 20 are equidistantly provided on the top surface of the valve body 1, a plurality of upper through holes 21 aligned with the lower through holes 20 are equidistantly provided on the bottom surface of the valve cover 2, and valve locking screws 22 are passed through the upper through holes 21 and the lower through holes 20. The valve locking screws 22 pass through the lower through holes 20 and the upper through holes 21 in sequence and are threadedly connected with valve locking nuts 23.

[0034] like Figure 2 As shown, a valve sealing groove 24 is provided on the top surface of the valve body 1, and the cross section of the valve sealing groove 24 is annular. A circular convex ring 25 is fixedly connected to the bottom surface of the valve cover 2, and the convex ring 25 is engaged with the valve sealing groove 24. A valve sealing ring 26 is glued to the bottom surface of the convex ring 25, and the valve sealing ring 26 is engaged with the valve sealing groove 24.

[0035] like Figure 2 As shown, the top surface of the valve cover 2 is provided with an upper column hole 27, an opening 28, a column sealing groove 29, and a lower column hole 31 in sequence from top to bottom. The upper column hole 27 is a circular hole. Both ends of the opening 28 extend to the side walls of the valve cover 2. The cross-section of the column sealing groove 29 is circular. In this embodiment, eight column sealing rings 30 stacked in sequence are embedded in the column sealing groove 29, and the lower column hole 31 is a circular hole.

[0036] like Figure 2 and 5 As shown, a pressure ring block 32 is provided in the opening 28, and the pressure ring block 32 is used to press and fix the column sealing ring 30 in the column sealing groove 29. Two through holes 33 are symmetrically provided on the top surface of the pressure ring block 32, and a middle column hole 34 is provided through the middle of the pressure ring block 32. The middle column hole 34 is a circular hole, and the middle column hole 34 is aligned with the upper column hole 27 and the lower column hole 31.

[0037] like Figure 2 and 5As shown, two locking rod frames 35 are symmetrically arranged on the outer wall of the valve cover 2, and the locking rod frames 35 include two locking rod plates 351 fixedly connected to the outer wall of the valve cover 2, and each locking rod plate 351 is penetrated with an outer locking rod hole 36, and the outer locking rod hole 36 is a circular hole. A locking block screw 37 is penetrated through the through hole 33, and the bottom of the locking block screw 37 is located between the two locking rod plates 351. The locking block screw 37 is penetrated with an inner locking rod hole 38 aligned with the outer locking rod hole 36, and the inner locking rod hole 38 is a circular hole.

[0038] like Figure 2 and 5 As shown, the outer locking rod hole 36 and the inner locking rod hole 38 are provided with a locking rod pin 39, and the locking rod pin 39 is interference fit with the outer locking rod hole 36 and the inner locking rod hole 38. When the locking rod pin 39 passes through the outer locking rod hole 36 and the inner locking rod hole 38 at the same time, the lower end of the locking block screw 37 is restricted from separating from the locking rod pin 39. The top of the locking block screw 37 passes through the through hole 33 and is threadedly connected with a locking block nut 40. The locking block screw 37 is sleeved with a locking block washer 41, and the locking block washer 41 is located between the locking block nut 40 and the top surface of the pressure ring block 32.

[0039] like Figure 1 As shown, a cylinder frame 42 is arranged on the top surface of the valve cover 2, and the cylinder frame 42 includes a bottom plate 421, a vertical rod 422, and a top plate 423. The bottom plate 421 is screwed to the top surface of the valve cover 2, and the vertical rod 422 is fixedly connected between the bottom plate 421 and the top plate 423. There are four vertical rods 422, and the four vertical rods 422 are distributed in a rectangular shape. The top plate 423 is fixedly installed on the top of the four vertical rods 422.

[0040] like Figure 1 and 3 As shown, an electromagnetic cylinder 43 is fixedly installed on the top surface of the top plate 423. The electromagnetic cylinder 43 is a driving component. The electromagnetic cylinder 43 has a piston rod 431, which is mainly used to drive the piston rod 431 to reciprocate up and down. The piston rod 431 of the electromagnetic cylinder 43 penetrates the top plate 423 and is flange-connected with a valve column 44. The valve column 44 passes through the bottom plate 421, the upper column hole 27, the middle column hole 34, the column sealing groove 29, and the lower column hole 31 in sequence and then extends into the air outlet cavity 4. The bottom of the valve column 44 is threadedly connected to the column threaded hole 15 of the column receiving platform 14, and the column sealing ring 30 is sleeved on the valve column 44.

[0041] When the high-reliability vertical normally closed electromagnetic gas emergency shut-off valve is working, the elastic force generated by the valve closing spring 19 acts on the movable core plate 16, so that the valve closing plug 18 remains inserted into the lower air inlet hole 11. At this time, the high-reliability vertical normally closed electromagnetic gas emergency shut-off valve is in a normally closed state.

[0042] When gas needs to be loaded or unloaded, the electromagnetic cylinder 43 drives the valve column 44 upward through the piston rod 431, and the upward movement of the valve column 44 will drive the movable core shaft 13 and the movable core plate 16 upward, and the upward movement of the movable core plate 16 will drive the valve closing plug 18 to be withdrawn from the lower air inlet hole 11. At this time, the high-reliability vertical normally closed electromagnetic gas emergency shut-off valve is in an open state, and the gas can stably pass through the air inlet chamber 3, the lower air inlet hole 11, the middle air hole 17, the upper air outlet hole 10, and the air outlet chamber 4 in sequence. The high-reliability vertical normally closed electromagnetic gas emergency shut-off valve has the advantage of high reliability.

[0043] The high-reliability vertical normally closed electromagnetic gas emergency shut-off valve is in a normally closed state. When gas needs to be loaded or unloaded, the high-reliability vertical normally closed electromagnetic gas emergency shut-off valve can automatically open. After the loading or unloading work is completed, the high-reliability vertical normally closed electromagnetic gas emergency shut-off valve can automatically close, which is beneficial to reducing the labor intensity of workers.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A highly reliable vertical normally closed electromagnetic gas emergency shut-off valve, comprising a valve body (1) and a valve cover (2) disposed on the valve body (1), characterized in that: An electromagnetic cylinder (43) is arranged above the valve cover (2); a valve column (44) penetrating the valve cover (2) is arranged below the piston rod (431) of the electromagnetic cylinder (43); an air inlet cavity (3), an air outlet cavity (4) and a partition (5) located between the air inlet cavity (3) and the air outlet cavity (4) are arranged in the valve body (1); a mounting hole (6) is provided on the partition (5); a normally closed valve core (7) is provided on the mounting hole (6); the normally closed valve core (7) comprises a core shell (71) which is plugged into the mounting hole (6) and has an inner cavity (9) on its bottom surface; and a core cover (72) arranged on the bottom surface of the core shell (71); the core shell ( A guide shaft hole (12) and an upper air outlet (10) are provided on the top surface of the core cover (71), a lower air outlet is provided on the core cover (72), a movable core shaft (13) connected to the top of the valve column (44) is passed through the guide shaft hole (12), a movable core plate (16) coaxially connected to the movable core shaft (13) is slidably arranged in the inner cavity (9), a middle air vent (17) is provided on the movable core plate (16), a valve closing plug (18) connected to the lower air inlet (11) is provided on the bottom surface of the movable core plate (16), and a valve closing spring (19) is provided between the top surface of the movable core plate (16) and the top wall of the inner cavity (9).

2. A highly reliable vertical normally closed electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: The cross section of the guide shaft hole (12) is a regular hexagon, and the cross section of the movable mandrel (13) is a regular hexagon.

3. A highly reliable vertical normally closed electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: A column connection platform (14) is arranged on the top of the movable core shaft (13), and a column connection threaded hole (15) threadedly connected to the bottom of the valve column (44) is provided on the top surface of the column connection platform (14).

4. A highly reliable vertical normally closed electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: A mounting plate (8) is provided on the top of the outer wall of the core shell (71), the bottom surface of the mounting plate (8) abuts against the top surface of the flat portion of the partition (5), and the mounting plate (8) is screwed to the top surface of the partition (5).

5. A highly reliable vertical normally closed electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: The top surface of the valve body (1) is provided with a valve sealing groove (24), the bottom surface of the valve cover (2) is provided with a convex ring (25) which is embedded in the valve sealing groove (24), and the bottom surface of the convex ring (25) is provided with a valve sealing ring (26) which is embedded in the valve sealing groove (24).

6. A highly reliable vertical normally closed electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: The top surface of the valve body (1) is provided with a plurality of lower through holes (20), the bottom surface of the valve cover (2) is provided with a plurality of upper through holes (21) aligned with the lower through holes (20), a valve locking screw (22) is passed through the upper through hole (21) and the lower through hole (20), and the valve locking screw (22) passes through the lower through hole (20) and the upper through hole (21) in sequence and is then threadedly connected to a valve locking nut (23).

7. A highly reliable vertical normally closed electromagnetic gas emergency shut-off valve according to claim 1, characterized in that: A cylinder frame (42) is arranged between the valve cover (2) and the electromagnetic cylinder (43), and the cylinder frame (42) comprises a bottom plate (421) arranged on the top surface of the valve cover (2), a vertical rod (422) arranged on the top surface of the bottom plate (421), and a top plate (423) arranged on the top of the vertical rod (422); the electromagnetic cylinder (43) is arranged on the top surface of the top plate (423), the piston rod (431) of the electromagnetic cylinder (43) passes through the top plate (423), and the valve column (44) passes through the bottom plate (421).

8. A highly reliable vertical normally closed electromagnetic gas emergency shut-off valve according to claim 7, characterized in that: The top surface of the valve cover (2) is provided with an upper column hole (27), an opening (28), a column sealing groove (29), and a lower column hole (31) in sequence downwardly; a plurality of column sealing rings (30) sleeved on the valve column (44) are embedded in the column sealing groove (29); a pressure ring block (32) is provided in the opening (28) for pressing and fixing the column sealing ring (30) in the column sealing groove (29); two through holes (33) are symmetrically provided on the top surface of the pressure ring block (32); a middle column hole (34) is provided in the middle of the pressure ring block (32); the valve column (44) passes through the bottom plate (421), the upper column hole (27), the middle column hole (34), the column sealing groove (29), and the lower column hole (31) in sequence.

9. A high-reliability vertical normally closed electromagnetic gas emergency shut-off valve according to claim 8, characterized in that: A locking rod frame (35) is provided on the outer wall of the valve cover (2), and the locking rod frame (35) includes two locking rod plates (351) fixedly connected to the outer wall of the valve cover (2), each of the locking rod plates (351) is provided with an outer locking rod hole (36), a locking block screw (37) is passed through the through hole (33), an inner locking rod hole (38) aligned with the outer locking rod hole (36) is formed at the bottom of the locking block screw (37), and a locking rod pin shaft (39) is passed through the outer locking rod hole (36) and the inner locking rod hole (38), and the top of the locking block screw (37) passes through the through hole (33) and is threadedly connected to a locking block nut (40), and a locking block washer (41) is sleeved on the locking block screw (37), and the locking block washer (41) is located between the locking block nut (40) and the top surface of the pressure ring block (32).

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