Safety valve lifting button type valve cap

Abstract

The utility model relates to the technical field of safety valves, in particular to a safety valve lifting button type valve bonnet which comprises a valve body, a valve rod is movably installed in the valve body, and a valve clack is arranged at the bottom end of the valve rod. A valve seat is in threaded connection with the interior of the bottom end of the valve body, and a positioning mechanism is arranged between the valve seat and the valve body. A valve bonnet body is movably installed at the upper end of the valve body, and a lifting mechanism is arranged between the valve bonnet body and the valve rod. When the pressure in a pipeline system reaches a set pressure and the safety valve does not jump accurately, the valve bonnet body can be lifted manually, when the valve bonnet body is lifted, the lifting button body is lifted, the lifting frame is lifted by the lifting button body through the cotter pin, the lifting frame drives the pin shaft to lift the valve rod, the valve rod drives the valve clack to be lifted synchronously, and after the valve bonnet body is lifted and the valve clack is lifted, the valve bonnet body is closed. And the passage of the valve body and the valve seat is opened, so that the safety valve can be manually operated to be opened in emergency.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a safety valve lifting button type valve cap. Background Technique

[0002] A safety valve is an automatic regulating device used to prevent the system pressure from exceeding the set value. It releases the excess pressure by opening or closing the passage to ensure the safety of equipment and pipelines, and is commonly used in boiler, pressure vessel and pipeline systems.

[0003] In the case where the pipeline system reaches the set pressure but the safety valve does not accurately lift, since the valve cap cannot be manually lifted for emergency opening, the pressure in the pipeline may continue to rise. For example, in a petrochemical pipeline system, if this situation occurs, the excessive pressure may cause the pipeline to rupture, leading to leakage accidents, and may further cause serious safety accidents such as fires and explosions, posing a great threat to the lives of personnel and the environment. Content of the Utility Model

[0004] The purpose of the utility model is to provide a safety valve lifting button type valve cap to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A safety valve lifting button type valve cap, comprising

[0007] A valve body, in which a valve stem is movably installed inside the valve body, and a valve flap is arranged at the bottom end of the valve stem;

[0008] A valve seat is threadedly connected to the inner bottom end of the valve body, and a positioning mechanism is arranged between the valve seat and the valve body;

[0009] A valve cap body is movably installed at the upper end of the valve body, and a lifting mechanism is arranged between the valve cap body and the valve stem.

[0010] Preferably, a screw sleeve is also sleeved in the middle of the top end of the valve body, and a locking nut is movably installed between the upper outer parts of the valve body and the screw sleeve;

[0011] Preferably, a second mounting seat is arranged on the outer part of the end of the valve stem close to the valve flap, a first mounting seat is arranged at the bottom end of the screw sleeve and on the outer part of the valve stem, and a spring is arranged between the first mounting seat and the second mounting seat and on the outer part of the valve stem;

[0012] Preferably, the lifting mechanism includes a pin shaft, the pin shaft is fixedly connected to the top end of the valve stem, a lifting frame is arranged at the top end of the pin shaft, a split pin is arranged at the top end of the lifting frame, and the top end of the split pin penetrates through the valve cap body to be provided with a hand-held button body;

[0013] Preferably, an O-ring is provided between the valve cap body and the split pin;

[0014] Preferably, the positioning mechanism includes an adjusting ring. The adjusting ring is arranged outside the top end of the valve seat. A screw is movably installed outside the bottom end of the valve body. The end of the screw is clamped with the adjusting ring, and a hexagonal nut is arranged at one end of the screw away from the adjusting ring.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] For this safety valve with a lifting button type valve cap, when the set pressure is reached in the pipeline system and the safety valve fails to trip accurately, the valve cap body can be manually lifted. When lifting, the hand-held button body is pulled, and the hand-held button body lifts the lifting frame through the split pin. The lifting frame drives the pin shaft to pull the valve stem, and the valve stem drives the valve flap to lift synchronously, and at the same time, the valve cap body is lifted. After the valve flap is lifted, the passage between the valve body and the valve seat is opened, so that the safety valve can be manually operated to open in an emergency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall front view structural schematic diagram of the present utility model;

[0018] Figure 2 is of the present utility model Figure 1 the enlarged schematic diagram at A in;

[0019] Figure 3 is of the present utility model Figure 1 the enlarged schematic diagram at B in;

[0020] Figure 4 is of the present utility model Figure 1 the enlarged schematic diagram at C in.

[0021] In the figure: 1, valve body; 2, valve stem; 3, valve flap; 4, valve seat; 5, valve cap body; 6, screw sleeve; 7, lock nut; 8, mounting seat two; 9, mounting seat one; 10, spring; 11, pin shaft; 12, lifting frame; 13, split pin; 14, hand-held button body; 15, O-ring; 16, adjusting ring; 17, screw; 18, hexagonal nut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] AsFigures 1-4 As shown, a technical solution provided by the present utility model is as follows:

[0024] A safety valve lifting button type valve cap, comprising a valve body 1, a valve stem 2 is movably installed inside the valve body 1, a valve flap 3 is arranged at the bottom end of the valve stem 2, a valve cap body 5 is movably installed at the upper end of the valve body 1, a lifting mechanism is arranged between the valve cap body 5 and the valve stem 2, a screw sleeve 6 is also sleeved in the middle of the top end of the valve body 1, a locking nut 7 is movably installed between the upper ends of the valve body 1 and the screw sleeve 6, a mounting seat two 8 is arranged on the outer side of one end of the valve stem 2 close to the valve flap 3, a mounting seat one 9 is arranged at the bottom end of the screw sleeve 6 and on the outer side of the valve stem 2, a spring 10 is arranged between the mounting seat one 9 and the mounting seat two 8 and on the outer side of the valve stem 2. The lifting mechanism includes a pin shaft 11, the pin shaft 11 is fixedly connected to the top end of the valve stem 2, a lifting frame 12 is arranged at the top end of the pin shaft 11, an open pin 13 is arranged at the top end of the lifting frame 12, a hand-held button body 14 is arranged through the valve cap body 5 at the top end of the open pin 13, and an O-ring 15 is arranged between the valve cap body 5 and the open pin 13;

[0025] In this embodiment, when the set pressure is reached in the pipeline system and the safety valve does not accurately lift, the valve cap body 5 can be manually lifted. When lifting, the hand-held button body 14 is lifted, the hand-held button body 14 lifts the lifting frame 12 through the open pin 13, the lifting frame 12 drives the pin shaft 11 to lift the valve stem 2, the valve stem 2 drives the valve flap 3 to lift synchronously, and at the same time, the valve cap body 5 is lifted. After the valve flap 3 is lifted, the passage between the valve body 1 and the valve seat 4 is opened, so that the safety valve can be manually operated to open in an emergency.

[0026] As Figure 1 and Figure 4 shown, a valve seat 4 is threadedly connected to the inner bottom end of the valve body 1, a positioning mechanism is arranged between the valve seat 4 and the valve body 1. The positioning mechanism includes an adjusting ring 16, the adjusting ring 16 is arranged on the outer side of the top end of the valve seat 4, a screw 17 is movably installed on the outer bottom end of the valve body 1, the end of the screw 17 is clamped with the adjusting ring 16, and a hexagonal nut 18 is arranged at the end of the screw 17 away from the adjusting ring 16;

[0027] In this embodiment, when disassembling the valve seat 4, a tool is used to twist the hexagonal nut 18, the hexagonal nut 18 controls the screw 17 to rotate and extend out, and the other end of the screw 17 synchronously withdraws from the outside of the adjusting ring 16, so that the unlocking between the valve body 1 and the valve stem 2 can be achieved, and then the valve seat 4 is rotated to remove the valve seat 4 from the lower end of the valve body 1.

[0028] Working principle: When the set pressure is reached in the pipeline system and the safety valve fails to lift accurately, the valve cap body 5 can be manually lifted. When lifting, the hand-held button body 14 is pulled. The hand-held button body 14 lifts the lifting frame 12 through the split pin 13. The lifting frame 12 drives the pin shaft 11 to pull the valve stem 2, and the valve stem 2 drives the valve disc 3 to lift synchronously, and at the same time lifts the valve cap body 5. After the valve disc 3 is lifted, the passage between the valve body 1 and the valve seat 4 is opened. When disassembling the valve seat 4, use a tool to twist the hexagon nut 18. The hexagon nut 18 controls the rotation and extension of the screw 17, and the other end of the screw 17 synchronously withdraws from the outside of the adjusting ring 16. In this way, the unlocking between the valve body 1 and the valve stem 2 can be achieved, and then the valve seat 4 is rotated to remove the valve seat 4 from the lower end of the valve body 1.

[0029] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only the preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety valve lifting button type bonnet, characterized in that: It comprises a valve body (1), a valve stem (2) is movably mounted inside the valve body (1), and a valve flap (3) is arranged at the bottom end of the valve stem (2); A valve seat (4) is internally threadedly connected to the bottom end of the valve body (1), and a positioning mechanism is provided between the valve seat (4) and the valve body (1); A valve cap body (5) is movably mounted on the upper end of the valve body (1), and a lifting mechanism is provided between the valve cap body (5) and the valve stem (2).

2. A safety valve lifting button type bonnet according to claim 1, characterized in that: A threaded sleeve (6) is sleeved on the middle portion of the top end of the valve body (1), and a locking nut (7) is movably mounted between the valve body (1) and the outer portion of the upper end of the threaded sleeve (6).

3. A safety valve lifting button type bonnet according to claim 2, characterized in that: A second mounting seat (8) is arranged outside one end of the valve stem (2) close to the valve disc (3), a first mounting seat (9) is arranged at the bottom end of the screw sleeve (6) and outside the valve stem (2), and a spring (10) is arranged between the first mounting seat (9) and the second mounting seat (8) and outside the valve stem (2).

4. A safety valve lifting button type bonnet according to claim 1, characterized in that: The lifting mechanism comprises a pin shaft (11), the pin shaft (11) is fixedly connected to the top end of the valve stem (2), a lifting frame (12) is arranged at the top end of the pin shaft (11), a cotter pin (13) is arranged at the top end of the lifting frame (12), and a hand-held button body (14) is arranged at the top end of the cotter pin (13) that penetrates the valve cap body (5).

5. A safety valve lifting button type bonnet according to claim 4, characterized in that: An O-ring (15) is provided between the valve cap body (5) and the split pin (13).

6. A safety valve lifting button type bonnet according to claim 1, characterized in that: The positioning mechanism comprises an adjusting ring (16), the adjusting ring (16) being arranged outside the top end of the valve seat (4), a screw (17) being movably mounted outside the bottom end of the valve body (1), the end of the screw (17) being snap-fitted to the adjusting ring (16), and a hexagonal nut (18) being arranged at one end of the screw (17) away from the adjusting ring (16).

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