Normally-open gas emergency cut-off valve

Abstract

The utility model is applicable to the technical field of emergency cut-off valves, and provides a normally open gas emergency cut-off valve, which comprises a cut-off valve body and a mounting seat, the bottom of the mounting seat is fixedly connected with a mounting disc, and the bottom of the mounting disc is provided with a guide groove. The stop valve can make contact with a main valve element in the stop valve body when gas circulation is cut off, double sealing can be conducted on the upper end face and the lower end face of a valve port, and therefore the sealing effect of gas cut-off is improved, meanwhile, when the stop valve body is powered off, an adjusting rod can be rotated to be away from a moving block, a toothed plate is conveniently pulled to be away from a gear, and the sealing effect of gas cut-off is improved. And then the adjusting column is manually rotated, so that the connecting pipe installed outside the adjusting column moves upwards, the lower sealing block and the upper sealing block can move into the valve port for cutting off and sealing, the situation that gas still flows normally due to the fact that the cut-off valve body cannot be used normally due to power failure is avoided, and the use safety is effectively improved.

Description

Technical Field

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

[0002] A normally open gas emergency cut-off valve is an important safety device used to provide safety protection in a gas pipeline system. It is in an open state under normal circumstances to ensure the normal supply of gas, but in case of an emergency, it can quickly close to cut off the gas supply, thus avoiding the occurrence and expansion of accidents.

[0003] However, when a power outage occurs at the working site, the open gas emergency cut-off valve cannot be closed, and it can only be closed when the power is on at the site, resulting in the gas still flowing normally. At the same time, the emergency cut-off valve can only achieve a single sealing effect when normally cutting off the gas and cannot perform double sealing, thus there are certain potential safety hazards. Summary of the Utility Model

[0004] The utility model provides a normally open gas emergency cut-off valve, aiming to solve the problems that the cut-off valve cannot be closed when there is a power outage and the emergency cut-off valve can only achieve a single sealing effect when normally cutting off the gas.

[0005] The utility model is realized as follows. A normally open gas emergency cut-off valve includes a cut-off valve body and a mounting seat: a mounting plate is fixedly connected to the bottom of the mounting seat, a guiding groove is opened at the bottom of the mounting plate, a fixing block is fixedly connected to the bottom of the mounting plate, an adjusting rod is movably connected to the inner wall of the fixing block, a limiting block is movably connected to the inner wall of the guiding groove, a moving block is fixedly connected to one side of the limiting block, an electric push rod is fixedly connected to one side of the moving block, a toothed plate is fixedly connected to the output end of the electric push rod, a gear is movably connected to the outer wall of the toothed plate, an adjusting column is fixedly connected to the inner wall of the gear, a connecting pipe is movably connected to the outer wall of the adjusting column, a guiding block is fixedly connected to the outer wall of the connecting pipe, a vertical rod is movably connected to the inner wall of the guiding block, a lower sealing block is fixedly connected to one end of the connecting pipe, and an upper sealing block is fixedly connected to the top of the lower sealing block.

[0006] Preferably, threads are provided on both the outer wall of the adjusting column and the inner wall of the connecting pipe, and the adjusting column is threadedly connected to the connecting pipe.

[0007] Preferably, the connecting pipe is movably connected to the vertical rod through the guiding block, a through groove matching the vertical rod is opened at the top of the guiding block, and one end of the vertical rod is fixedly connected to the inner bottom wall of the mounting seat.

[0008] Preferably, through grooves are opened at both the bottom of the mounting seat and the bottom of the mounting plate, bearings and sealing rings are respectively installed on the inner walls of the through grooves, and both the bearings and the sealing rings are fixedly connected to the adjusting column.

[0009] Preferably, threads are provided on the inner wall of the fixed block and the outer wall of the adjusting rod, and the fixed block is threadedly connected to the adjusting rod, and one end of the adjusting rod is movably connected to the top of the moving block.

[0010] Preferably, both the lower sealing block and the upper sealing block are rubber sealing blocks, and the diameter of the lower sealing block is greater than that of the upper sealing block.

[0011] Preferably, threads are installed at the bottom of the mounting plate, and the mounting plate is fixedly connected to the mounting seat through bolts.

[0012] Compared with the prior art, the embodiments of the present application mainly have the following beneficial effects:

[0013] By providing the lower sealing block and the upper sealing block, it can contact the main valve core in the cut-off valve body when cutting off the gas flow, and can double-seal the upper and lower end faces of the valve port, thereby improving the sealing effect of gas cut-off. At the same time, when the cut-off valve body encounters a power failure, the adjusting rod can be rotated away from the moving block, so as to facilitate pulling the toothed plate away from the gear, and then by manually rotating the adjusting column, the connecting pipe installed outside the adjusting column can be moved upward, so that the lower sealing block and the upper sealing block can move into the valve port for cut-off sealing, avoiding the situation that the gas is still flowing normally due to the cut-off valve body being unable to be used normally due to power failure, and effectively improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front sectional structure schematic diagram of the present utility model;

[0015] Figure 2 is a front view structure schematic diagram of the present utility model;

[0016] Figure 3 is a structure schematic diagram of the adjusting rod and the toothed plate of the present utility model;

[0017] Figure 4 is a structure schematic diagram of the connecting pipe of the present utility model.

[0018] In the figure: 1, cut-off valve body; 2, mounting seat; 3, mounting plate; 4, guide groove; 5, fixed block; 6, adjusting rod; 7, moving block; 8, limit block; 9, electric push rod; 10, toothed plate; 11, gear; 12, adjusting column; 13, connecting pipe; 14, guide block; 15, vertical rod; 16, lower sealing block; 17, upper sealing block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of this application or the above drawings are used to distinguish different objects and not to describe a specific order.

[0020] Reference to "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0021] An embodiment of the present utility model provides a normally open gas emergency cut-off valve, as Figures 1-4 shown, including a cut-off valve body 1 and a mounting seat 2: a mounting plate 3 is fixedly connected to the bottom of the mounting seat 2, a guiding groove 4 is opened at the bottom of the mounting plate 3, a fixing block 5 is fixedly connected to the bottom of the mounting plate 3, a regulating rod 6 is movably connected to the inner wall of the fixing block 5, a limiting block 8 is movably connected to the inner wall of the guiding groove 4, a moving block 7 is fixedly connected to one side of the limiting block 8, an electric push rod 9 is fixedly connected to one side of the moving block 7, a tooth plate 10 is fixedly connected to the output end of the electric push rod 9, a gear 11 is movably connected to the outer wall of the tooth plate 10, a regulating column 12 is fixedly connected to the inner wall of the gear 11, a connecting pipe 13 is movably connected to the outer wall of the regulating column 12, a guiding block 14 is fixedly connected to the outer wall of the connecting pipe 13, a vertical rod 15 is movably connected to the inner wall of the guiding block 14, one end of the connecting pipe 13 is fixedly connected to a lower sealing block 16, and an upper sealing block 17 is fixedly connected to the top of the lower sealing block 16.

[0022] It should be noted that when a power outage occurs at the working site, the opened gas emergency cut-off valve cannot be closed, and it can only be closed when the site is powered on, resulting in the gas still flowing normally. At the same time, the emergency cut-off valve can only achieve a single sealing effect when normally cutting off the gas and cannot perform double sealing, thus there are certain potential safety hazards. Therefore, in order to solve the problems that the cut-off valve cannot be closed during a power outage and the emergency cut-off valve can only achieve a single sealing effect when normally cutting off the gas, this solution sets a lower sealing block 16 and an upper sealing block 17, which can contact the main valve core in the cut-off valve body 1 when cutting off the gas flow, and can perform double sealing on the upper and lower end faces of the valve port, thereby improving the sealing effect of gas cut-off. At the same time, when a power outage occurs in the cut-off valve body 1, the adjusting rod 6 can be rotated away from the moving block 7, so as to facilitate pulling the toothed plate 10 away from the gear 11, and then by manually rotating the adjusting column 12, the connecting pipe 13 installed outside the adjusting column 12 can be moved upward, so that the lower sealing block 16 and the upper sealing block 17 can move into the valve port for cut-off sealing, avoiding the situation that the gas still flows normally due to the cut-off valve body 1 being unable to be used normally due to a power outage, and effectively improving the safety of use.

[0023] Specifically, in this embodiment, the outer wall of the adjusting column 12 and the inner wall of the connecting pipe 13 are both provided with threads, and the adjusting column 12 is threadedly connected to the connecting pipe 13, which can adjust the up and down movement of the connecting pipe 13, so as to manually or automatically cut off the gas.

[0024] In a further preferred embodiment of the present utility model, as Figures 1-4 shown, the connecting pipe 13 is movably connected to the vertical rod 15 through a guide block 14, and a through groove matching the vertical rod 15 is opened at the top of the guide block 14, and one end of the vertical rod 15 is fixedly connected to the inner bottom wall of the mounting seat 2, which can make the connecting pipe 13 move up and down linearly, avoiding the situation that the connecting pipe 13 rotates synchronously when being adjusted.

[0025] In this embodiment, starting the motor push rod 9 drives the toothed plate 10 to move. When the moving plate 10 moves, it meshes with the outer wall of the gear 11, thereby driving the gear 11 to rotate. When the adjusting column 12 rotates, it drives the connecting pipe 13 on the outer wall to move. When the connecting pipe 13 moves, the guiding block 14 provided on the outer wall moves outside the vertical rod 15, enabling the connecting pipe 13 to move steadily upward, and enabling the lower sealing block 16 and the upper sealing block 17 to seal and cut off the valve port, which can cooperate with the valve core of the cut-off valve body 1 to achieve a double-sealing effect. And when a power failure occurs, the adjusting rod 6 can be rotated away from the moving block 7, and then the moving block 7 is pushed to move in the guiding groove 4 through the limiting block 8, so that the toothed plate 10 moves away from the outside of the gear 11. Then, manually rotating the adjusting column 12 can drive the connecting pipe 13 to move and enable the lower sealing block 16 and the upper sealing block 17 to seal and cut off the valve port, and the cut-off adjustment can be made according to the usage requirements.

[0026] In a further preferred embodiment of the present utility model, as Figures 1-2 shown, through grooves are respectively provided at the bottoms of the mounting seat 2 and the mounting disc 3, and bearings and sealing rings are respectively installed on the inner walls of the through grooves, and both the bearing and the sealing ring are fixedly connected to the adjusting column 12.

[0027] In this embodiment, it can be movably installed with the adjusting column 12, so that it can rotate normally, and the sealing performance between the adjusting rod 12 and the mounting seat 2 and the mounting disc 3 can also be improved during use.

[0028] In a further preferred embodiment of the present utility model, as Figure 3 shown, threads are provided on the inner wall of the fixed block 5 and the outer wall of the adjusting rod 6, and the fixed block 5 is threadedly connected to the adjusting rod 6, and one end of the adjusting rod 6 is movably connected to the top of the moving block 7.

[0029] In this embodiment, it can limit the moving block 7. At the same time, when it is necessary to manually cut off the gas, the adjusting rod 6 can be rotated away from the moving block 7 to facilitate the separation of the toothed plate 10 from the gear 11.

[0030] In a further preferred embodiment of the present utility model, as Figure 4 shown, both the lower sealing block 16 and the upper sealing block 17 are rubber sealing blocks, and the diameter of the lower sealing block 16 is larger than that of the upper sealing block 17.

[0031] In this embodiment, the lower sealing block 16 can seal the bottom end of the valve port, and the upper sealing block 17 can extend into the valve port to contact the valve core, thereby achieving a double-sealing effect.

[0032] In a further preferred embodiment of the present utility model, as Figure 2 shown, threads are provided at the bottom of the mounting disc 3, and the mounting disc 3 is fixedly connected to the mounting seat 2 through bolts.

[0033] In this embodiment, the mounting disk 3 can be bolt-fixed to the bottom of the mounting base 2.

[0034] It should be noted that, for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present utility model is not limited by the described action sequence, because according to the present utility model, some steps may be adopted in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present utility model.

[0035] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the above division of units can have other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the shown or discussed coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0036] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0037] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions, or other adjustments to the features in the embodiments of the present utility model according to the situation without creative efforts, so as to obtain different technical solutions that essentially do not deviate from the concept of the present utility model, and these technical solutions also belong to the scope of protection of the present utility model.

Claims

1. A normally open gas emergency shut-off valve, characterized in that: The invention comprises a cut-off valve body (1) and a mounting seat (2): a mounting plate (3) is fixedly connected to the bottom of the mounting seat (2); a guide groove (4) is provided at the bottom of the mounting plate (3); a fixing block (5) is fixedly connected to the bottom of the mounting plate (3); an adjusting rod (6) is movably connected to the inner wall of the fixing block (5); a limiting block (8) is movably connected to the inner wall of the guide groove (4); a moving block (7) is fixedly connected to one side of the limiting block (8); an electric push rod (9) is fixedly connected to one side of the moving block (7); and the electric push rod (9) is The output end is fixedly connected with a toothed plate (10), the outer wall of the toothed plate (10) is movably connected with a gear (11), the inner wall of the gear (11) is fixedly connected with an adjustment column (12), the outer wall of the adjustment column (12) is movably connected with a connecting pipe (13), the outer wall of the connecting pipe (13) is fixedly connected with a guide block (14), the inner wall of the guide block (14) is movably connected with a vertical rod (15), one end of the connecting pipe (13) is fixedly connected with a lower sealing block (16), and the top of the lower sealing block (16) is fixedly connected with an upper sealing block (17).

2. A normally open gas emergency shut-off valve as claimed in claim 1, characterized in that: The outer wall of the adjusting column (12) and the inner wall of the connecting pipe (13) are both provided with threads, and the adjusting column (12) and the connecting pipe (13) are connected by threads.

3. A normally open gas emergency shut-off valve as claimed in claim 1, characterized in that: The connecting pipe (13) is movably connected to the vertical rod (15) through a guide block (14), and a through groove matching the vertical rod (15) is provided on the top of the guide block (14), and one end of the vertical rod (15) is fixedly connected to the inner bottom wall of the mounting seat (2).

4. A normally open gas emergency shut-off valve as claimed in claim 1, characterized in that: The bottom of the mounting seat (2) and the bottom of the mounting plate (3) are both provided with through grooves, and the inner walls of the through grooves are respectively provided with bearings and sealing rings, and the bearings and sealing rings are both fixedly connected to the adjustment column (12).

5. A normally open gas emergency shut-off valve as claimed in claim 1, characterized in that: The inner wall of the fixed block (5) and the outer wall of the adjusting rod (6) are both provided with threads, and the fixed block (5) is threadedly connected to the adjusting rod (6), and one end of the adjusting rod (6) is movably connected to the top of the moving block (7).

6. A normally open gas emergency shut-off valve as claimed in claim 1, characterized in that: The lower sealing block (16) and the upper sealing block (17) are both rubber sealing blocks, and the diameter of the lower sealing block (16) is greater than the diameter of the upper sealing block (17).

7. A normally open gas emergency shut-off valve as claimed in claim 1, characterized in that: The bottom of the mounting plate (3) is provided with a thread, and the mounting plate (3) is fixedly connected to the mounting seat (2) via bolts.

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