Pressure relief straight-through type sealing stop valve

Abstract

The utility model relates to the technical field of stop valves, in particular to a pressure relief straight-through type sealing stop valve which comprises a valve body, a pressure relief pipe is fixedly connected to the bottom of the valve body, the pressure relief pipe is communicated with the interior of the valve body, a fixing plate is fixedly connected to the inner wall of the pressure relief pipe, a first through hole is formed in the middle of the fixing plate, and a second through hole is formed in the middle of the fixing plate. A bottom plate is fixedly connected to the bottom of the pressure relief pipe, a second through hole is formed in the surface of the bottom plate, a screw rod is in threaded connection with the interior of the bottom plate, a movable plate is movably connected to the top of the screw rod and located below the first through hole, and a spring is installed on the lower surface of the movable plate; the bottoms of the springs are attached to the upper surface of the bottom plate. The utility model provides the straight-through type sealing stop valve with the pressure relief function, which can automatically release the pressure when the system pressure is too high and protect the safety of pipelines and equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of stop valve especially relates to a take pressure relief straight through formula sealed stop valve. BACKGROUND

[0002] The stop valve belongs to the forced sealing type valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to be leakproof. When the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the friction of the valve stem and the packing and the thrust generated by the pressure of the medium. The force for closing the valve is greater than the force for opening the valve, so the diameter of the valve stem needs to be large, otherwise the valve stem will be bent.

[0003] The pressure relief straight through formula sealed stop valve is a special valve combining the cutting function of the stop valve and the pressure relief protection device. The straight through structure design makes the fluid path straight, reduces the flow resistance, and the built-in pressure relief mechanism can automatically release pressure when the system pressure is too high, ensuring the safety of the pipeline. SUMMARY

[0004] Therefore, the utility model provides a take pressure relief straight through formula sealed stop valve, which can automatically release pressure when the system pressure is too high, and protects the safety of the pipeline and equipment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a take pressure relief straight through formula sealed stop valve, comprising a valve body, the bottom of the valve body is fixedly connected with a pressure relief pipe, the pressure relief pipe is communicated with the inside of the valve body, the inner wall of the pressure relief pipe is fixedly connected with a fixed plate, the middle part of the fixed plate is provided with a first through hole, the bottom of the pressure relief pipe is fixedly connected with a bottom plate, the surface of the bottom plate is provided with a second through hole, the inside of the bottom plate is screwedly connected with a screw rod, the top of the screw rod is movably connected with a moving plate, the moving plate is below the first through hole, the lower surface of the moving plate is provided with a spring, and the bottom of the spring is attached to the upper surface of the bottom plate.

[0006] By adopting the above technical scheme, the position of the moving plate can be adjusted by rotating the screw rod during use. When the screw rod is rotated inward to the innermost part, the moving plate is tightly attached to the fixed plate, so that the first through hole in the fixed plate can be completely sealed, avoiding leakage of liquid and the like from the valve body. When the screw rod is rotated outward from the innermost part by a distance, the moving plate will be separated from the fixed plate, but the moving plate will still be tightly attached to the fixed plate under the action of the spring. When liquid pressure acts on the moving plate, the moving plate will move downward under the action of the pressure, discharging part of the liquid from the pressure relief pipe, so that the pressure can be automatically released when the system pressure is too high, protecting the safety of the pipeline and equipment.

[0007] As a further description of the above technical scheme:

[0008] The inner plate is fixedly connected to the inside of the valve body, and a connecting hole is formed in the middle of the inner plate.

[0009] By adopting the above technical scheme, the use of the valve body is facilitated.

[0010] As a further description of the above technical scheme:

[0011] The valve cover is fixedly connected to the top of the valve body, the sealing cover is fixedly connected to the top of the valve cover, the valve rod is threadedly connected to the inside of the sealing cover, the valve flap is fixedly connected to the bottom of the valve rod, and the valve flap is located directly above the connecting hole.

[0012] By adopting the above technical scheme, rotating the valve rod can control the up-and-down movement of the valve flap, thereby controlling the opening and closing of the inside of the valve body.

[0013] As a further description of the above technical scheme:

[0014] The sealing ring is installed in the inside of the sealing cover, and the sealing ring is in close contact with the outer surface of the valve rod.

[0015] By adopting the above technical scheme, liquid leakage between the sealing cover and the valve rod is avoided.

[0016] As a further description of the above technical scheme:

[0017] The connecting port is fixedly connected to the left and right ends of the valve body, and the connecting flange is arranged at the end of the connecting port away from the valve body.

[0018] By adopting the above technical scheme, the valve body is facilitated to be connected and used with the pipeline.

[0019] As a further description of the above technical scheme:

[0020] The flange is fixedly connected to the lower surface of the moving plate, and the top of the screw rod is located in the inside of the flange.

[0021] By adopting the above technical scheme, the screw rod can push the moving plate upwards to move, and the moving plate is facilitated to seal the first through hole on the fixed plate.

[0022] As a further description of the above technical scheme:

[0023] The clamping groove is formed in the upper surface of the moving plate, the rubber ring is fixedly connected to the inside of the clamping groove, and the upper surface of the rubber ring is in close contact with the lower surface of the fixed plate.

[0024] By adopting the above technical scheme, the sealing property between the fixed plate and the moving plate is increased.

[0025] By the above technical scheme, the utility model discloses a kind of sealing stop valve with pressure relief straight-through at least has following beneficial effects:

[0026] Compared with prior art, the sealing stop valve with pressure relief straight-through, when rotating screw adjusts the position of moving plate, when screw rotates to the inside most, moving plate is close to fixed plate, at this time, the first through hole in fixed plate can be completely sealed, avoid liquid etc. from the valve body discharge leakage, when screw is rotated by the inside most to the outside and out a distance, moving plate will be separated from fixed plate at this time, but moving plate will still be close to fixed plate under the action of spring, when liquid pressure acts on moving plate, moving plate will move downward under the action of pressure, part liquid etc. is discharged from pressure relief pipe, can automatically release pressure when system pressure is too high, protect pipeline and equipment safety. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a first visual angle overall structure schematic diagram of the sealing stop valve with pressure relief straight-through proposed in the utility model;

[0028] Figure 2 It is a second visual angle overall structure schematic diagram of the sealing stop valve with pressure relief straight-through proposed in the utility model;

[0029] Figure 3 It is the internal structure sectional view of the sealing stop valve with pressure relief straight-through proposed in the utility model;

[0030] Figure 4 It is the sealing stop valve with pressure relief straight-through proposed in the utility model; Figure 3 It is the structure enlarged view of A place in the utility model.

[0031] LEGEND:

[0032] 1, valve body;2, inner plate;3, connecting hole;4, valve cover;5, sealing cover;6, sealing ring;7, valve rod;8, valve flap;9, connecting port;10, pressure relief pipe;11, fixed plate;12, bottom plate;13, screw;14, moving plate;15, flange;16, spring;17, rubber ring. DETAILED DESCRIPTION

[0033] REFERENCE Figures 1-4The utility model provides a kind of with pressure relief straight-through type sealed stop valve: including valve body 1, the bottom of valve body 1 is fixedly connected with pressure relief pipe 10, pressure relief pipe 10 is connected with the inside of valve body 1, the inner wall of pressure relief pipe 10 is fixedly connected with fixed plate 11, the middle part of fixed plate 11 is provided with first through-hole, the bottom of pressure relief pipe 10 is fixedly connected with bottom plate 12, the surface of bottom plate 12 is equipped with second through-hole, the inside of bottom plate 12 is threadedly connected with screw rod 13, the top of screw rod 13 is movably connected with moving plate 14, moving plate 14 is below first through-hole, the lower surface of moving plate 14 is equipped with spring 16, the bottom of spring 16 is attached to the upper surface of bottom plate 12, when using, rotate screw rod 13 and adjust the position of moving plate 14, when screw rod 13 is rotated to the most inside, moving plate 14 is tightly attached to fixed plate 11, first through-hole in fixed plate 11 can be completely sealed at this time, avoid liquid and the like from valve body 1 inside discharge leakage, when screw rod 13 is rotated from the most inside to the outside a distance, moving plate 14 will be separated from fixed plate 11 at this time, but moving plate 14 will still be tightly attached to fixed plate 11 under the action of spring 16, when liquid pressure acts on moving plate 14, moving plate 14 will move downward under the action of pressure, part liquid and the like are discharged from pressure relief pipe 10, can automatically release pressure when system pressure is too high, protect pipeline and equipment safety.

[0034] The inside of valve body 1 is fixedly connected with inner plate 2, the middle part of inner plate 2 is equipped with connecting hole 3, to facilitate the use of valve body 1, the left and right ends of valve body 1 are fixedly connected with connecting port 9, the end, away from valve body 1, of connecting port 9 is provided with connecting flange, to facilitate the use of valve body 1 and pipeline connection.

[0035] The top of valve body 1 is fixedly connected with valve cover 4, the inside of valve cover 4 is provided with packing, to assist sealing, the top of valve cover 4 is fixedly connected with sealing cover 5, the inside of sealing cover 5 is threadedly connected with valve rod 7, the bottom of valve rod 7 is fixedly connected with valve flap 8, valve flap 8 is located directly above connecting hole 3, rotate valve rod 7 can control valve flap 8 to move up and down, to control the opening and closing of the inside of valve body 1, sealing ring 6 is installed in the inside of sealing cover 5, sealing ring 6 is attached to the outer surface of valve rod 7, to avoid liquid from leaking between sealing cover 5 and valve rod 7.

[0036] The lower surface of moving plate 14 is fixedly connected with flange 15, the top of screw rod 13 is located in the inside of flange 15, so that screw rod 13 can push moving plate 14 to move upward, to facilitate moving plate 14 to seal first through-hole on fixed plate 11, the upper surface of moving plate 14 is equipped with clamping groove, rubber ring 17 is fixedly connected in the inside of clamping groove, the upper surface of rubber ring 17 is attached to the lower surface of fixed plate 11, to increase the sealing property between fixed plate 11 and moving plate 14.

[0037] Working principle: in use, the rotating screw 13 adjusts the position of the moving plate 14, when the screw 13 rotates inward to the innermost, the moving plate 14 is close to the fixed plate 11, at this time the first through hole in the fixed plate 11 can be completely sealed, avoiding liquid leakage from the valve body 1, when the screw 13 rotates outward from the innermost to a distance, at this time the moving plate 14 will be separated from the fixed plate 11, but under the action of the spring 16, the moving plate 14 will still be close to the fixed plate 11, when there is liquid pressure acting on the moving plate 14, the moving plate 14 will move downward under the action of the pressure, part of the liquid will be discharged from the pressure relief pipe 10, which can automatically release the pressure when the system pressure is too high, protecting the pipeline and equipment safety.

[0038] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A direct mounted pressure relief seal stop valve comprising a valve body (1) characterised in that: The bottom of the valve body (1) is fixedly connected with a pressure relief pipe (10), the pressure relief pipe (10) is communicated with the inside of the valve body (1), the inner wall of the pressure relief pipe (10) is fixedly connected with a fixed plate (11), the middle part of the fixed plate (11) is provided with a first through hole, the bottom of the pressure relief pipe (10) is fixedly connected with a bottom plate (12), the surface of the bottom plate (12) is provided with a second through hole, the inside of the bottom plate (12) is threadedly connected with a screw rod (13), the top of the screw rod (13) is movably connected with a moving plate (14), the moving plate (14) is below the first through hole, the lower surface of the moving plate (14) is mounted with a spring (16), the bottom of the spring (16) is attached to the upper surface of the bottom plate (12).

2. A direct seated pressure relief globe valve according to claim 1, wherein: The inside of the valve body (1) is fixedly connected with an inner plate (2), the middle part of the inner plate (2) is provided with a connecting hole (3).

3. A direct seated pressure relief globe valve according to claim 2, wherein: The top of the valve body (1) is fixedly connected with a valve cover (4), the top of the valve cover (4) is fixedly connected with a sealing cover (5), the inside of the sealing cover (5) is threadedly connected with a valve rod (7), the bottom of the valve rod (7) is fixedly connected with a valve flap (8), the valve flap (8) is directly above the connecting hole (3).

4. A direct seated pressure relief globe valve according to claim 3, wherein: The inside of the sealing cover (5) is mounted with a sealing ring (6), the sealing ring (6) is attached to the outer surface of the valve rod (7).

5. A direct seated pressure relief globe valve according to claim 1, wherein: The left and right ends of the valve body (1) are fixedly connected with connecting mouths (9), one end of the connecting mouth (9) away from the valve body (1) is provided with a connecting flange.

6. A direct seated pressure relief globe valve according to claim 1, wherein: The lower surface of the moving plate (14) is fixedly connected with a flange (15), the top of the screw rod (13) is inside the flange (15).

7. A direct seated pressure relief globe valve according to claim 1, wherein: The upper surface of the moving plate (14) is provided with a clamping groove, the inside of the clamping groove is fixedly connected with a rubber ring (17), the upper surface of the rubber ring (17) is attached to the lower surface of the fixed plate (11). The lower surface of the moving plate (14) is fixedly connected with a flange (15), the top of the screw rod (13) is inside the flange (15). The upper surface of the moving plate (14) is provided with a clamping groove, the inside of the clamping groove is fixedly connected with a rubber ring (17), the upper surface of the rubber ring (17) is attached to the lower surface of the fixed plate (11).

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