High-pressure steam safety valve

Abstract

The utility model discloses a high-pressure steam safety valve, and particularly relates to the field of safety valves, which comprises a valve body, an exhaust port is arranged on one side of the valve body, a valve seat is mounted at the bottom end in the valve body, a valve clack is arranged above the valve seat, a recoil part is sleeved on the valve clack, a valve cover is mounted at the top of the valve body, and the valve cover is sleeved on the valve clack. A lower extrusion disc is arranged at the bottom end of the interior of the valve deck, a sealing cover is installed at the top of the valve deck, a valve rod is installed in the middle of the top of the lower extrusion disc, and a spring is arranged on the outer side of the portion, above the lower extrusion disc, of the valve rod in a winding mode. By arranging the reinforcing sleeve, the connecting position of the first flange and the second flange can be reinforced, so that the pressure bearing capacity of the safety valve is improved, meanwhile, the guide disc is further embedded between the first flange and the second flange, the sealing rubber ring is bonded to the periphery of the guide disc, and the use sealing performance of the safety valve can be improved; and high-pressure steam is prevented from leaking from the joint of the valve body and the valve cover.

Description

Technical Field

[0001] The utility model relates to the field of safety valves, and more specifically, to a high-pressure steam safety valve. Background Art

[0002] The safety valve is a special device used for overpressure protection of the pressure system. It is an automatic valve. When the system pressure reaches the set pressure, it does not rely on any external force, but uses the force of the medium itself to discharge a certain rated amount of fluid to prevent the pressure in the system from exceeding the predetermined safety value. When the pressure returns to normal, the valve will close again to prevent the medium from continuing to flow out. The high-temperature and high-pressure gas safety valve is a pressure-limiting safety device for gas pressure overload protection in the energy gas pipeline of the extrusion servo system;

[0003] After searching, the existing patent (publication number: CN217815230U) discloses a high temperature and high pressure safety valve, including a safety valve body, a flange and a reinforcement component, the top of the safety valve body is provided with an upper valve body, the upper valve body and the safety valve body are connected by a flange, the outer part of the flange is provided with a reinforcement component, the reinforcement component includes a first half ring, a second half ring, a first sleeve ring, a second sleeve ring and a clamp, the side of the first half ring is provided with a second half ring, and the inner side of the first half ring is fixedly connected to the first sleeve ring. The high temperature and high pressure safety valve is provided with a reinforcement component at the connection of the flange, so that the effect of double reinforcement and pressurization can be achieved. Once the pressure on the safety valve itself is too strong, it will not cause stamping leakage at the connection of the flange. The reinforcement component will compress the connection strength of the flange, which greatly improves the pressure bearing capacity of the connection of the safety valve. The overall structure is simple and the functionality is strong.

[0004] The existing safety valve is essentially to release pressure rather than to increase the threshold of the valve's pressure tolerance. Therefore, the safety valve itself has a weak pressure tolerance. Once the pressure on the valve is too high and cannot be relieved immediately, the valve is prone to leakage due to the excessive pressure. In addition, the existing safety valve discharge pressure adjustment is relatively inconvenient. At the same time, the above-cited patent documents do not propose relevant solutions to solve the above problems.

[0005] Therefore, a high-pressure steam safety valve is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a high-pressure steam safety valve to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the utility model provides the following technical solution: a high-pressure steam safety valve, comprising a valve body, a vent is provided on one side of the valve body, a valve seat is installed at the bottom end of the inner part of the valve body, a valve disc is provided above the valve seat, and a recoil piece is sleeved on the valve disc, a valve cover is installed on the top of the valve body, a lower extrusion disc is provided at the bottom end of the inner part of the valve cover, and a sealing cover is installed on the top of the valve cover;

[0008] A valve stem is installed at the middle position of the top of the lower extrusion plate, and a spring is wound around the outer side of the valve stem above the lower extrusion plate, a threaded sleeve is provided at the top of the valve cover, and an upper pressure plate is provided at the top inside the valve cover, an adjusting screw passes through the threaded sleeve, and the bottom of the adjusting screw is rotatably connected to the upper pressure plate, and the top of the valve stem passes through the adjusting screw and the upper pressure plate.

[0009] Preferably, the top of the valve body is integrally connected with a second flange, and the bottom of the valve cover is integrally connected with a first flange, and reinforcement sleeves are distributed in an annular array on the outside of the first flange and the second flange.

[0010] Preferably, three reinforcement sleeves are provided, and grooves are provided at the central positions of the top and bottom ends of the reinforcement sleeves, protrusions matching the shape of the grooves are evenly provided at the edge positions of the top of the first flange and the edge positions of the bottom of the second flange, and mounting holes corresponding to the through holes of the first flange and the second flange are evenly opened on the reinforcement sleeve.

[0011] Preferably, the bottom of the inner surface of the cover is provided with limiting grooves in an annular array, and the surface of the threaded sleeve is evenly provided with limiting blocks that match the shape of the limiting grooves, and the limiting blocks are first clamped with the limiting grooves and then fixed by bolts.

[0012] Preferably, the inner diameter of the adjusting screw matches the outer diameter of the valve stem, and the adjusting screw is threadedly connected to the threaded sleeve, and the top of the adjusting screw is integrally connected with a rotating handle.

[0013] Preferably, a downwardly recessed sinking groove is provided at the central position of the top of the second flange, and a through guide groove is opened at the central position of the sinking groove, a guide plate with a shape matching the sinking groove is provided in the sinking groove, and a pipe sleeve matching the inner diameter of the guide groove is integrally connected to the middle position of the bottom of the guide plate, the outer diameter of the guide plate is larger than the inner diameter of the valve cover, and a sealing rubber ring is bonded to the outer periphery of the guide plate.

[0014] Preferably, the recoil part includes a top abutment tube and a bottom recoil disk, and a valve groove matching the shape of the valve disc is provided inside the recoil disk, the outer diameter of the abutment tube matches the inner diameter of the pipe sleeve, an abutment head is integrally connected to the middle position of the bottom of the lower extrusion disk, and a abutment groove matching the shape of the abutment head is provided at the top of the abutment tube.

[0015] Technical effects and advantages of the utility model:

[0016] 1. Compared with the prior art, the high-pressure steam safety valve is provided with a rotating handle at the top of the adjusting screw, so that the height of the adjusting screw is easier to rotate and adjust, and then the height of the upper pressure plate is adjusted to control the compression amount of the spring, so as to adjust the discharge pressure, and the operation is very convenient.

[0017] 2. Compared with the prior art, the high-pressure steam safety valve is provided with a reinforcement sleeve to reinforce the connection between the first flange and the second flange, thereby improving the pressure-bearing capacity of the safety valve itself. At the same time, a guide plate is embedded between the first flange and the second flange, and a sealing rubber ring is bonded to its outer periphery, which can improve the sealing performance of the safety valve and prevent high-pressure steam from leaking from the connection between the valve body and the valve cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the appearance structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the partial cutaway structure of the utility model.

[0020] Figure 3 It is a schematic diagram of the split structure of the utility model.

[0021] Figure 4 This is a schematic diagram of the valve seat structure of the utility model.

[0022] Figure 5 It is a schematic diagram of the cutaway structure of the valve seat of the utility model.

[0023] The accompanying drawings are marked as follows: 1. exhaust port; 2. valve body; 3. reinforcement sleeve; 301. mounting hole; 302. groove; 4. valve cover; 5. sealing cover; 501. limit slot; 6. adjusting screw; 601. upper pressure plate; 7. spring; 8. valve stem; 9. guide plate; 901. pipe sleeve; 10. first flange; 1001. bump; 11. second flange; 1101. sinking groove; 1102. guide groove; 12. valve seat; 13. threaded sleeve; 1301. limit block; 14. rotating handle; 15. lower extrusion plate; 1501. abutment; 16. recoil piece; 1601. abutment groove; 1602. abutment tube; 1603. flap groove; 1604. recoil plate; 17. valve flap. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Embodiment 1

[0026] As attached Figure 1 A high-pressure steam safety valve shown in the figure comprises a valve body 2, an exhaust port 1 is arranged on one side of the valve body 2, a valve seat 12 is installed at the bottom end of the valve body 2, a valve disc 17 is arranged above the valve seat 12, and a recoil piece 16 is sleeved on the valve disc 17, a valve cover 4 is installed on the top of the valve body 2, a lower extrusion plate 15 is arranged at the bottom end of the valve cover 4, and a sealing cover 5 is installed on the top of the valve cover 4;

[0027] A valve stem 8 is installed at the middle position of the top of the lower extrusion plate 15, and a spring 7 is wound around the outer side of the valve stem 8 above the lower extrusion plate 15, a threaded sleeve 13 is provided at the top of the valve cover 4, and an upper pressure plate 601 is provided at the top inside the valve cover 4, an adjusting screw 6 passes through the threaded sleeve 13, and the bottom of the adjusting screw 6 is rotatably connected to the upper pressure plate 601, and the top of the valve stem 8 passes through the adjusting screw 6 and the upper pressure plate 601.

[0028] Among them: when in use, the valve disc 17 is pressed against the valve seat 12 under the elastic force of the spring 7. When the steam support force at the bottom of the valve disc 17 is greater than the elastic force of the spring 7 acting on the upper part of the valve disc 17, the spring 7 is compressed, the valve disc 17 and the recoil piece 16 are lifted up, and the steam leaving the valve seat 12 is discharged outward through the gap between the valve disc 17 and the valve seat 12. When the steam support force at the bottom of the valve disc 17 is less than the elastic force of the spring 7 acting on the upper part of the valve disc 17, the spring 7 is extended, so that the valve disc 17 and the valve seat 12 are tightly combined again, and the steam stops being discharged.

[0029] Embodiment 2

[0030] Based on the first embodiment, the solution in the first embodiment is further detailed in combination with the following specific working methods. Figures 1 to 5 As shown, see the following description for details:

[0031] As a preferred embodiment, the top of the valve body 2 is integrally connected to the second flange 11, and the bottom of the valve cover 4 is integrally connected to the first flange 10, and reinforcement sleeves 3 are distributed in a circular array on the outside of the first flange 10 and the second flange 11; further, the reinforcement sleeve 3 is designed to reinforce the connection between the first flange 10 and the second flange 11, thereby improving the pressure-bearing capacity of the safety valve itself.

[0032] As a preferred embodiment, three reinforcement sleeves 3 are provided, and grooves 302 are provided at the central positions of the top and bottom ends of the reinforcement sleeves 3, and protrusions 1001 that match the shape of the grooves 302 are evenly provided at the edge positions of the top of the first flange 10 and the edge positions of the bottom of the second flange 11, and mounting holes 301 corresponding to the through holes of the first flange 10 and the second flange 11 are evenly opened on the reinforcement sleeve 3; further, during installation, the grooves 302 in the reinforcement sleeve 3 are first engaged with the protrusions 1001, and then the bolts are used to penetrate the mounting holes 301 to limit and fix the reinforcement sleeve 3, so that the connection of the reinforcement sleeve 3 is tighter and more stable, further improving the pressure-bearing capacity of the safety valve itself.

[0033] As a preferred embodiment, the bottom of the inner surface of the cover 5 is distributed with limiting slots 501 in a circular array, and the surface of the threaded sleeve 13 is evenly provided with limiting blocks 1301 that match the shape of the limiting slots 501. The limiting blocks 1301 and the limiting slots 501 are first clamped and then fixed by bolts. Furthermore, the connection is first clamped and then fixed by bolts, which makes the connection tighter and more stable, less likely to loosen, and safer to use.

[0034] As a preferred embodiment, the inner diameter of the adjusting screw 6 matches the outer diameter of the valve stem 8, and the adjusting screw 6 is threadedly connected to the threaded sleeve 13, and the top of the adjusting screw 6 is integrally connected with a rotating handle 14; further, rotating the rotating handle 14 can drive the adjusting screw 6 to rotate relative to the threaded sleeve 13, and then adjust the height of the upper pressure plate 601, control the compression amount of the spring 7, and realize the adjustment of the discharge pressure. The operation is very convenient, and the design of the rotating handle 14 makes the discharge pressure adjustment more convenient and labor-saving.

[0035] As a preferred embodiment, a downwardly recessed sinking groove 1101 is provided at the central position of the top of the second flange 11, and a through guide groove 1102 is opened at the central position of the sinking groove 1101, a guide plate 9 with a shape matching the sinking groove 1101 is provided in the sinking groove 1101, and a pipe sleeve 901 matching the inner diameter of the guide groove 1102 is integrally connected at the middle position of the bottom of the guide plate 9, the outer diameter of the guide plate 9 is larger than the inner diameter of the valve cover 4, and a sealing rubber ring is bonded to the outer periphery of the guide plate 9; further, the sealing rubber ring bonded to the guide plate 9 can improve the sealing performance of the safety valve and prevent high-pressure steam from leaking from the connection between the valve body 2 and the valve cover 4.

[0036] As a preferred embodiment, the recoil member 16 includes a top abutment tube 1602 and a bottom recoil disk 1604, and the interior of the recoil disk 1604 is provided with a flap groove 1603 that matches the shape of the valve flap 17, the outer diameter of the abutment tube 1602 matches the inner diameter of the pipe sleeve 901, a butt head 1501 is integrally connected to the middle position of the bottom of the lower extrusion disk 15, and a butt groove 1601 that matches the shape of the butt head 1501 is provided on the top of the abutment tube 1602; further, the pipe sleeve 901 at the bottom of the guide disk 9 can guide the movement of the recoil member 16 so that it can only move vertically and is not prone to tilting. The upward movement of the recoil member 16 can drive the butt head 1501 to move upward, that is, the lower extrusion disk 15 moves upward, the spring 7 is compressed, and the steam discharge is realized, and the design is more reasonable.

[0037] The working process of the utility model is as follows:

[0038] When in use, the reinforcing sleeve 3 is designed to reinforce the connection between the first flange 10 and the second flange 11, thereby improving the pressure-bearing capacity of the safety valve itself. The sealing rubber ring bonded to the guide plate 9 can improve the sealing performance of the safety valve. Turning the rotary handle 14 can drive the adjusting screw 6 to rotate relative to the threaded sleeve 13, and then adjust the height of the upper pressure plate 601, control the compression amount of the spring 7, and realize the adjustment of the discharge pressure. When working, the valve disc 17 is pressed against the valve seat 12 under the elastic force of the spring 7. When the steam support force at the bottom of the valve disc 17 is greater than the elastic force of the spring 7 acting on the upper part of the valve disc 17, the valve disc 17 and the recoil piece 16 are lifted up and leave the valve seat 12. At the same time, the spring 7 is compressed, and the steam is discharged outward through the gap between the valve disc 17 and the valve seat 12. When the steam support force at the bottom of the valve disc 17 is less than the elastic force of the spring 7 acting on the upper part of the valve disc 17, the spring 7 is reset, so that the valve disc 17 is tightly combined with the valve seat 12 again, and the steam stops being discharged.

[0039] Finally: The above are only preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A high-pressure steam safety valve, comprising a valve body (2), characterized in that: An exhaust port (1) is provided on one side of the valve body (2), and a valve seat (12) is installed at the bottom end of the valve body (2), a valve flap (17) is provided above the valve seat (12), and a recoil piece (16) is sleeved on the valve flap (17), a valve cover (4) is installed on the top of the valve body (2), and a lower extrusion plate (15) is provided at the bottom end of the valve cover (4), and a sealing cover (5) is installed on the top of the valve cover (4); A valve stem (8) is installed at the middle position of the top of the lower extrusion plate (15), and a spring (7) is wound around the outer side of the valve stem (8) above the lower extrusion plate (15). A threaded sleeve (13) is provided at the top of the valve cover (4), and an upper pressure plate (601) is provided at the top of the valve cover (4). An adjusting screw (6) passes through the threaded sleeve (13), and the bottom of the adjusting screw (6) is rotatably connected to the upper pressure plate (601). The top of the valve stem (8) passes through the adjusting screw (6) and the upper pressure plate (601).

2. A high pressure steam safety valve according to claim 1, characterized in that: The top of the valve body (2) is integrally connected to a second flange (11), and the bottom of the valve cover (4) is integrally connected to a first flange (10), and reinforcement sleeves (3) are distributed in an annular array on the outside of the first flange (10) and the second flange (11).

3. A high pressure steam safety valve according to claim 2, characterized in that: The reinforcement sleeves (3) are provided with three grooves (302) at the central positions of the top and bottom ends of the reinforcement sleeves (3); protrusions (1001) matching the shapes of the grooves (302) are evenly arranged at the edge positions of the top of the first flange (10) and the edge positions of the bottom of the second flange (11); and mounting holes (301) corresponding to the through holes of the first flange (10) and the second flange (11) are evenly opened on the reinforcement sleeves (3).

4. A high pressure steam safety valve according to claim 1, characterized in that: The bottom of the inner surface of the sealing cover (5) is provided with limiting slots (501) distributed in an annular array, and the surface of the threaded sleeve (13) is evenly provided with limiting blocks (1301) that match the shape of the limiting slots (501), and the limiting blocks (1301) and the limiting slots (501) are first clamped and then fixed by bolts.

5. A high pressure steam safety valve according to claim 1, characterized in that: The inner diameter of the adjusting screw (6) matches the outer diameter of the valve stem (8), and the adjusting screw (6) is threadedly connected to the threaded sleeve (13). The top of the adjusting screw (6) is integrally connected with a rotating handle (14).

6. A high pressure steam safety valve according to claim 2, characterized in that: A downwardly recessed sinking groove (1101) is provided at the central position of the top of the second flange (11), and a through guide groove (1102) is provided at the central position of the sinking groove (1101). A guide plate (9) of a shape matching the sinking groove (1101) is provided in the sinking groove (1101), and a pipe sleeve (901) matching the inner diameter of the guide groove (1102) is integrally connected at the middle position of the bottom of the guide plate (9). The outer diameter of the guide plate (9) is larger than the inner diameter of the valve cover (4), and a sealing rubber ring is bonded to the outer periphery of the guide plate (9).

7. A high pressure steam safety valve according to claim 6, characterized in that: The recoil member (16) comprises a top abutment tube (1602) and a bottom recoil disc (1604), and a flap groove (1603) matching the shape of the valve flap (17) is provided inside the recoil disc (1604). The outer diameter of the abutment tube (1602) matches the inner diameter of the pipe sleeve (901). A butt head (1501) is integrally connected to the middle position of the bottom of the lower extrusion disc (15), and a butt groove (1601) matching the shape of the butt head (1501) is provided at the top of the abutment tube (1602).

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