Safety valve

Abstract

The utility model relates to the technical field of valves, and discloses a safety valve which comprises a valve body and a pressure plugging mechanism, the valve body is provided with an output port and an input port, the pressure plugging mechanism is used for plugging the input port, and the pressure plugging mechanism comprises a mounting cover, a first screw rod, a spring, a plugging barrel and a fixing piece. A mounting opening communicated with the interior of the valve body is formed in the top of the valve body, the mounting cover covers the mounting opening and is fixedly connected with the valve body, the plugging barrel is slidably mounted in the mounting opening, a first threaded hole is formed in the mounting cover, the first screw is in threaded connection in the first threaded hole, and the spring is arranged between the first screw and the inner bottom of the plugging barrel. One end of the fixing piece is installed on the plugging cylinder, and the other end is detachably connected with the valve body. The safety valve can solve the problem that in the prior art, when the safety valve is maintained, inspection can be conducted only after equipment or a pipeline is closed, and operation efficiency is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a safety valve. Background Art

[0002] Safety valve is a safety protection valve, mainly used in high-pressure equipment, pipelines, etc. When the pressure in the equipment or pipeline increases and exceeds the threshold of the safety valve, the safety valve automatically opens to release the pressure, which plays an important role in protecting personal safety and equipment operation.

[0003] For example, a low-temperature and high-pressure micro-opening safety valve disclosed in Chinese patent [Announcement No.: CN220600558U] includes a valve body shell; the top end of the valve body shell is detachably connected to a connecting shell, and a through hole is opened at the top end of the valve body shell; the inner side of the connecting shell is provided with a first slide plate, a second slide plate and a limit ring from top to bottom, a spring is provided between the first slide plate and the second slide plate, a threaded rod is rotatably installed on the top end of the connecting shell, the first slide plate is threadedly connected to the threaded rod, a connecting rod is fixed to the bottom end of the second slide plate, the bottom end of the connecting rod is movably arranged on the inner side of the valve body shell and is connected to a sealing head, a first sealing gasket is arranged on the sealing head, a partition is fixed to the inner bottom end of the valve body shell, and a sealing hole is opened on the partition plate; a transparent observation glass is provided on the connecting shell, and a scale is provided on the transparent observation glass.

[0004] Since the spring in the safety valve is in a compressed state for a long time, there is a problem of pressure drop after long-term use, which affects the normal use of the safety valve. Therefore, during use, the safety valve will be inspected and maintained irregularly. In the prior art, when maintaining the safety valve, it is necessary to shut down the equipment or pipeline before inspection, which greatly affects the operating efficiency. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a safety valve to solve the problem in the prior art that when the safety valve is maintained, it is necessary to shut down the equipment or pipeline before inspection, which affects the working efficiency.

[0006] The utility model solves the above technical problems through the following technical means:

[0007] A safety valve comprises a valve body and a pressure sealing mechanism, wherein the valve body is provided with an output port and an input port, the pressure sealing mechanism is used to seal the input port, the pressure sealing mechanism comprises a mounting cover, a first screw, a spring, a sealing cylinder and a fixing part, the top of the valve body is provided with a mounting port connected to the interior of the valve body, the mounting cover is arranged at the mounting port and is fixedly connected to the valve body, the sealing cylinder is slidably installed in the mounting port, the mounting cover is provided with a first threaded hole, the first screw is threadedly connected to the first threaded hole, the spring is arranged between the first screw and the bottom of the sealing cylinder, one end of the fixing part is installed on the sealing cylinder, and the other end is detachably connected to the valve body, when the fixing part is fixedly connected to the valve body, the sealing cylinder is fixed to the valve body and seals the input port.

[0008] Furthermore, the fixing member includes a sliding rod and a second screw rod fixedly connected to the bottom of the sliding rod, the mounting cover is provided with a through hole at a position corresponding to the sliding rod, the sliding rod is inserted into the through hole, a fixing ring is provided at the top of the sealing cylinder, a second threaded hole is provided on the fixing ring, a third threaded hole is provided at a position corresponding to the second threaded hole on the upper end surface of the valve body, the second screw rod is threadedly connected to the second threaded hole, and when the second screw rod is threadedly connected to the third threaded hole, the sealing cylinder is fixed to the valve body and blocks the input port.

[0009] Furthermore, a first mounting plate is disposed on the top of the valve body, and a second mounting plate is disposed on the bottom of the mounting cover, and the first mounting plate is fixedly connected to the second mounting plate.

[0010] Furthermore, a first support block is slidably disposed in the sealing cylinder, and the first support block is located between the first screw rod and the spring.

[0011] Furthermore, a rod body is inserted into the blocking cylinder, the first support block is slidably arranged on the rod body, the spring is sleeved on the rod body, and a redundant hole is opened at the position of the first screw rod corresponding to the rod body.

[0012] Furthermore, a second support block is slidably arranged on the rod body, the spring is arranged between the first support block and the second support block, and a limit block for preventing the second support block from moving downward is arranged on the rod body.

[0013] Furthermore, a plugging head is fixedly provided at the bottom of the plugging cylinder, and a sealing ring is provided at the position of the input port corresponding to the plugging head.

[0014] Furthermore, a liquid discharge port is provided on one side of the valve body, and a sealing plug is sealedly connected inside the liquid discharge port.

[0015] Beneficial effects of the utility model:

[0016] 1. The utility model provides a plugging cylinder and a fixing part connected to the plugging cylinder. When maintaining the safety valve, it is only necessary to fix the fixing part to the valve body to keep the plugging cylinder in a state of blocking the input port. After removing the mounting cover, the spring in the plugging cylinder can be taken out and replaced or repaired without shutting down the equipment or pipeline, thereby ensuring the working efficiency.

[0017] 2. The utility model provides a slide rod and a second screw rod, and the second screw rod can be driven to rotate by rotating the slide rod, thereby achieving a fixed connection between the fixing member and the valve body, and does not affect the removal of the installation cover.

[0018] 3. The utility model provides a rod body, a first support block and a second support block, which, on the one hand, ensures the squeezing effect of the first screw on the spring, and on the other hand, prevents the spring from contacting the bottom of the plugging tube, thereby avoiding corrosion and damage to the spring due to water accumulation at the bottom of the plugging tube.

[0019] 4. The utility model provides a drain port, so that when the sealing plug is pulled out, the liquid in the valve body can flow out through the drain port, thereby preventing the liquid from remaining in the valve body and corroding and damaging the sealing head and the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional structural schematic diagram of a safety valve of the utility model;

[0021] Figure 2 It is a schematic diagram of the cross-sectional split structure of a valve body and a mounting cover in a safety valve of the utility model;

[0022] Figure 3 It is a schematic diagram of the cross-sectional structure of a plugging cylinder in a safety valve of the utility model;

[0023] in,

[0024] 1. Valve body; 11. Output port; 12. Input port; 121. Sealing ring; 13. Mounting port; 14. First mounting plate; 15. Third threaded hole; 16. Drain port; 161. Sealing plug;

[0025] 2. Mounting cover; 21. Second mounting plate; 22. First threaded hole; 23. Through hole;

[0026] 3. first screw; 31. redundant hole;

[0027] 4. Spring;

[0028] 5. Sealing tube; 51. Sealing head; 52. Fixing ring; 521. Second threaded hole;

[0029] 6. fixing member; 61. sliding rod; 611. hexagon socket hole; 62. second screw;

[0030] 7. Rod body; 71. First support block; 72. Second support block; 73. Limit block. DETAILED DESCRIPTION

[0031] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the illustrations provided in the following embodiments are only for exemplary descriptions, and they are only schematic diagrams, not physical diagrams, and cannot be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts in the figures may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the figures may be omitted.

[0032] The same or similar numbers in the figures of the embodiments of the present invention correspond to the same or similar parts. In the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the figures are only used for illustrative purposes and cannot be understood as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] like Figure 1-Figure 3 As shown, a safety valve of the utility model comprises a valve body 1 and a pressure blocking mechanism, wherein an output port 11 and an input port 12 are provided on the valve body 1, wherein the input port 12 is used to connect to a device or a pipeline, and the pressure blocking mechanism is used to block the input port 12. When the pressure in the device or pipeline increases and exceeds the threshold of the safety valve, the pressure blocking mechanism releases the blocking of the input port 12, so that the gas or liquid in the device or pipeline is discharged through the input port 12, the valve body 1 and the output port 11, thereby reducing the pressure in the device or pipeline.

[0034] In this embodiment, the pressure sealing mechanism includes a mounting cover 2, a first screw 3, a spring 4, a sealing cylinder 5 and a fixing part 6. A mounting port 13 connected to the interior of the valve body 1 is opened at the top of the valve body 1. The mounting cover 2 is arranged at the mounting port 13 to seal the mounting port 13. A first mounting plate 14 is arranged on the top of the valve body 1, and a second mounting plate 21 is arranged on the bottom of the mounting cover 2. The first mounting plate 14 is fixedly connected to the second mounting plate 21 by fixing bolts, thereby realizing a fixed connection between the valve body 1 and the mounting cover 2.

[0035] In this embodiment, the plugging cylinder 5 is slidably installed in the installation port 13, a plugging head 51 is fixedly provided at the bottom of the plugging cylinder 5, and a sealing ring 121 is provided at the position of the input port 12 corresponding to the plugging head 51. When the plugging cylinder 5 moves downward, the plugging head 51 and the sealing ring 121 are pressed tightly against each other, and the input port 12 of the valve body 1 is sealed. When the plugging cylinder 5 moves upward, the plugging head 51 and the sealing ring 121 are separated, and the input port 12 of the valve body 1 is opened.

[0036] In this embodiment, a first threaded hole 22 is provided on the mounting cover 2, and the first screw rod 3 is threadedly connected in the first threaded hole 22. The spring 4 is arranged between the first screw rod 3 and the bottom of the plugging tube 5. The spring 4 is a compression spring 4. The spring 4 is used to keep the plugging tube 5 moving downward, so that the plugging head 51 and the sealing ring 121 are kept in a tight state, and the input port 12 is blocked. When the pressure in the equipment or pipeline exceeds the elastic force of the spring 4, the plugging head 51 is forced to move upward, the input port 12 of the valve body 1 is opened, and the gas or liquid in the equipment or pipeline is discharged through the input port 12, the valve body 1 and the output port 11, thereby reducing the pressure in the equipment or pipeline. It should be noted that the compression degree of the spring 4 can be changed by rotating the turntable of the first screw rod 3, thereby changing the pressure that pushes the plugging head 51 to move upward.

[0037] In this embodiment, one end of the fixing member 6 is mounted on the blocking tube 5, and the other end is detachably connected to the valve body 1. When the fixing member 6 is fixedly connected to the valve body 1, the blocking tube 5 is fixed to the valve body 1 and blocks the input port 12. In this embodiment, four fixing members 6 are provided, and the four fixing members 6 are distributed along the circumference of the blocking sleeve. Specifically, the fixing member 6 includes a slide bar 61 and a second screw bar 62 fixedly connected to the bottom of the slide bar 61. In this embodiment, the slide bar 61 and the second screw bar 62 are integrally formed. In some other embodiments, welding, bonding and the like can also be used to achieve the fixed connection between the slide bar 61 and the second screw bar 62. A fixing ring 52 is provided at the top of the blocking tube 5, and a second threaded hole 521 is provided on the fixing ring 52. The second screw bar 62 is threadedly connected in the second threaded hole 521 to achieve the fixed connection between the fixing member 6 and the blocking tube 5. The mounting cover 2 is provided with a through hole 23 at a position corresponding to the slide bar 61, and the slide bar 61 is inserted into the through hole 23. The upper end surface of the valve body 1 is provided with a third threaded hole 15 at a position corresponding to the second threaded hole 521. When the slide bar 61 is rotated, the second screw 62 can be driven to rotate. When the second screw 62 is threadedly connected in the third threaded hole 15, the blocking cylinder 5 is fixed to the valve body 1 and blocks the input port 12. It should be noted that the second threaded hole 521 has the same thread direction as the third threaded hole 15. In this embodiment, a hexagonal hole 611 is provided at the top of the slide bar 61 to facilitate the rotation of the slide bar 61. And by sliding the slide bar 61 in the through hole 23, when the mounting cover 2 is removed, the slide bar 61 is prevented from affecting the mounting cover 2 from being separated from the valve body 1. In some other embodiments, the fixing member 6 can also be detachably connected to the valve body 1 by plugging, clamping, etc., so that the blocking cylinder 5 keeps the state of blocking the input port 12.

[0038] In this embodiment, a rod body 7 is inserted into the plugging tube 5, and a first support block 71 and a second support block 72 are slidably arranged on the rod body 7. The first support block 71 is located between the first screw 3 and the spring 4. The contact surface is increased by the first support block 71 to ensure the squeezing effect of the first screw 3 on the spring 4. The spring 4 is sleeved on the rod body 7, and the spring 4 is pressed tightly between the first support block 71 and the second support block 72. A limit block 73 is arranged on the rod body 7 to prevent the second support block 72 from moving downward. The second support block 72 and the limit block 73 are arranged to prevent the spring 4 from contacting the bottom of the plugging tube 5, and to avoid the situation where the spring 4 is corroded and damaged due to water accumulation at the bottom of the plugging tube 5. A redundant hole 31 is opened at the position of the first screw 3 corresponding to the rod body 7, and the redundant hole 31 is used to provide an escape space for the rod body 7 when it rises.

[0039] In this embodiment, a drain port 16 is provided on one side of the valve body 1, and a sealing plug 161 is sealed in the drain port 16. When the sealing plug 161 is pulled out, the liquid in the valve body 1 can flow out through the drain port 16, thereby preventing the liquid from remaining in the valve body 1 and corroding and damaging the sealing head 51 and the sealing ring 121.

[0040] When inspecting and maintaining the safety valve of the utility model:

[0041] First, by rotating the four slide bars 61 , the slide bars 61 drive the second screw bar 62 to rotate, so that the second screw bar 62 is screwed into the third threaded hole 15 , so that the blocking tube 5 keeps blocking the input port 12 .

[0042] Subsequently, the mounting cover 2 is removed from the valve body 1 by rotating the fixing bolts, and the spring 4 in the plugging cylinder 5 is taken out for replacement or repair.

[0043] The above embodiments are only used to illustrate the technical solution of the utility model and are not intended to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art 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. The technology, shape, and structure that are not described in detail in the utility model are all well-known technologies.

Claims

1. A safety valve, comprising a valve body (1) and a pressure blocking mechanism, wherein the valve body (1) is provided with an output port (11) and an input port (12), and the pressure blocking mechanism is used to block the input port (12), and is characterized in that: The pressure blocking mechanism comprises a mounting cover (2), a first screw rod (3), a spring (4), a blocking tube (5) and a fixing member (6); a mounting port (13) communicating with the interior of the valve body (1) is provided at the top of the valve body (1); the mounting cover (2) is arranged at the mounting port (13) and is fixedly connected to the valve body (1); the blocking tube (5) is slidably mounted in the mounting port (13); a first threaded hole (22) is provided on the mounting cover (2); the first screw rod (3) is threadedly connected to the first threaded hole (22); the spring (4) is arranged between the first screw rod (3) and the bottom of the blocking tube (5); one end of the fixing member (6) is mounted on the blocking tube (5) and the other end is detachably connected to the valve body (1); when the fixing member (6) is fixedly connected to the valve body (1), the blocking tube (5) is fixed to the valve body (1) and blocks the input port (12).

2. A safety valve according to claim 1, characterized in that: The fixing member (6) comprises a sliding rod (61) and a second screw rod (62) fixedly connected to the bottom of the sliding rod (61); a through hole (23) is provided on the mounting cover (2) at a position corresponding to the sliding rod (61); the sliding rod (61) is inserted into the through hole (23); a fixing ring (52) is provided on the top of the blocking tube (5); a second threaded hole (521) is provided on the fixing ring (52); a third threaded hole (15) is provided on the upper end surface of the valve body (1) at a position corresponding to the second threaded hole (521); the second screw rod (62) is threadedly connected to the second threaded hole (521); when the second screw rod (62) is threadedly connected to the third threaded hole (15), the blocking tube (5) is fixed to the valve body (1) and blocks the input port (12).

3. A safety valve according to claim 1, characterized in that: A first mounting plate (14) is arranged on the top of the valve body (1), and a second mounting plate (21) is arranged on the bottom of the mounting cover (2); the first mounting plate (14) is fixedly connected to the second mounting plate (21).

4. A safety valve according to claim 1, characterized in that: A first support block (71) is slidably disposed in the blocking cylinder (5), and the first support block (71) is located between the first screw rod (3) and the spring (4).

5. A safety valve according to claim 4, characterized in that: A rod body (7) is inserted into the blocking cylinder (5), the first support block (71) is slidably arranged on the rod body (7), the spring (4) is sleeved on the rod body (7), and a redundant hole (31) is opened at a position of the first screw rod (3) corresponding to the rod body (7).

6. A safety valve according to claim 5, characterized in that: A second support block (72) is slidably arranged on the rod body (7), the spring (4) is arranged between the first support block (71) and the second support block (72), and a limit block (73) is arranged on the rod body (7) for preventing the second support block (72) from moving downward.

7. A safety valve according to claim 1, characterized in that: A plugging head (51) is fixedly arranged at the bottom of the plugging cylinder (5), and a sealing ring (121) is arranged at a position of the input port (12) corresponding to the plugging head (51).

8. A safety valve according to claim 1, characterized in that: A liquid discharge port (16) is provided on one side of the valve body (1), and a sealing plug (161) is sealedly connected inside the liquid discharge port (16).

Images