Safety protection device for pressure vessel

Abstract

The utility model relates to the technical field of pressure vessel safety, in particular to a pressure vessel safety protection device which comprises a device body, the device body is composed of a valve seat, a valve body, a valve rod, a rod sealing head, a reset spring and a pull ring, the valve seat is provided with a valve cavity and a clamping sealing ring groove, the valve seat is provided with a first inner screw groove and an embedded sealing pad, the valve body is provided with an embedded groove and an outer thread, and the valve body is provided with a second inner screw groove and an embedded sealing pad. A sealing convex ring is arranged on the valve body, the reset spring is arranged on the valve rod in a sleeving mode, a sealing ring and a stud are arranged on the rod sealing head, and a second inner spiral groove and a ring hook hole are formed in the valve rod. The detachable valve body is arranged on the valve seat, the valve rod structure with the detachable rod end socket is arranged, and meanwhile, the annular hook hole structure is arranged on the valve rod, so that the valve rod, the rod end socket, the pull ring and the reset spring can be independently and conveniently detached and replaced; and the good sealing performance of the device body can be kept under extreme temperature and pressure conditions as a whole.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure vessel safety, in particular to a pressure vessel safety protection device. Background Art

[0002] The pressure vessel safety protection device is an extremely important safety device, widely used in boilers, pressure vessels and piping systems. Its main function is to automatically open when the pressure in the system rises abnormally and exceeds the preset safety value, releasing excess pressure, thereby protecting the pressure vessel and related equipment from overpressure damage and ensuring the safety of operators and the production environment.

[0003] The working principle of pressure vessel safety protection device is based on the balance of forces:

[0004] Under normal operating conditions, the system pressure is lower than or equal to the set pressure of the pressure vessel safety protection device. The downward pressure of the spring on the sealing rod is greater than the upward thrust of the medium pressure on the sealing rod. The sealing rod remains closed to prevent the medium from flowing out.

[0005] In the case of overpressure, when the pressure in the system exceeds the set pressure of the pressure vessel safety protection device, the upward thrust of the medium pressure on the sealing rod exceeds the force of the spring, the sealing rod opens, and the medium is discharged into the atmosphere or a designated safe location until the system pressure drops to a safe range.

[0006] After the pressure drops, as the medium is discharged, when the system pressure drops below the reset pressure of the pressure vessel safety protection device, the spring seals the rod again and closes the valve, and the safety valve returns to normal operation.

[0007] At present, the anti-loosening sealing performance of the pressure vessel safety protection body is relatively weak. In addition, its various components will age and need to be replaced after long-term use. However, most of the components of the pressure vessel safety protection body are not convenient to dismantle and replace independently, and the modular design is low. Utility Model Content

[0008] The purpose of the present invention is to solve the above-mentioned shortcomings in the prior art and to propose a pressure vessel safety protection device.

[0009] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0010] A pressure vessel safety protection device is designed, including a device body, which is composed of a valve seat, a valve body, a valve stem, a rod head, a reset spring, and a pull ring. The valve seat is provided with a valve cavity and a sealing ring groove, the valve seat is provided with a first internal thread groove and an embedded sealing gasket, the valve body is provided with an embedded groove and an external thread, the valve body is provided with a sealing convex ring, the reset spring is sleeved on the valve stem, the rod head is provided with a sealing ring and a stud, and the valve stem is provided with a second internal thread groove and a ring hook hole.

[0011] Furthermore, the valve seat is threadedly connected to the external thread via the first internal thread groove, so that the valve body can be easily removed from the valve seat at a later time.

[0012] Furthermore, the sealing convex ring is squeezed and clamped with the sealing ring groove, and the top cross-section of the sealing convex ring and the sealing ring groove is a ring-shaped structure. When the sealing convex ring is squeezed and inserted into the sealing ring groove, the highly elastic sealing convex ring will generate a vertical rebound force, which acts on the first internal thread groove and the external thread to ensure the sealing degree, and at the same time achieves the anti-loosening effect of the valve body installed on the valve seat.

[0013] Furthermore, the valve stem is threadedly connected to the stud via the second inner thread groove, making it convenient to replace the stem head at a later time.

[0014] Furthermore, the pull ring is connected to the ring hook hole. The pull ring can be made of stainless steel elastic metal material used for key rings, which is rolled into an elastic ring shape structure. The elastic metal ring made of stainless steel usually has an opening to facilitate the removal and assembly of the pull ring from the ring hook hole.

[0015] Furthermore, the two ends of the reset spring are respectively in compression contact with the inner groove wall of the embedded groove and the upper end surface of the rod head, which makes it convenient to remove the reset spring from the valve stem from bottom to top later.

[0016] Furthermore, the rod seal head is of a conical structure as a whole, and the rod seal head is in squeeze contact with the embedded gasket through the sealing ring, thereby achieving an extrusion sealing effect on the valve cavity.

[0017] The pressure vessel safety protection device proposed in this utility model has the following beneficial effects:

[0018] 1. The utility model provides a detachable valve body on the valve seat, and provides a valve stem structure with a detachable stem head. At the same time, a ring hook hole structure is provided on the valve stem. This allows the valve stem, stem head, pull ring, and return spring to be independently and conveniently disassembled and replaced, which significantly improves ease of use and maintenance efficiency.

[0019] 2. The utility model adopts a sealing convex ring and a sealing ring made of high-performance sealing materials, thereby improving the overall sealing performance of the device body even under extreme temperature and pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a schematic front view of the overall structure of the utility model;

[0022] Figure 3 For the utility model Figure 2 Middle YY section;

[0023] Figure 4 For the utility model Figure 3 A partial enlarged view of the middle Z position;

[0024] Figure 5 It is a bottom view schematic diagram of the overall structure of the present invention.

[0025] In the figure: 1 device body; 2 valve seat; 21 valve cavity; 22 first internal thread groove; 23 sealing ring groove; 24 embedded gasket; 3 valve body; 31 embedded groove; 32 sealing convex ring; 33 external thread; 4 valve stem; 40 second internal thread groove; 41 ring hook hole; 5 rod head; 51 sealing ring; 52 stud; 6 return spring; 7 pull ring. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Reference Figure 1-5 , a pressure vessel safety protection device includes a device body 1, which is composed of a valve seat 2, a valve body 3, a valve stem 4, a rod head 5, a reset spring 6, and a pull ring 7. The valve seat 2 is provided with a valve cavity 21 and a sealing ring groove 23, and the valve seat 2 is provided with a first inner screw groove 22 and an embedded sealing gasket 24. The valve body 3 is provided with an embedded groove 31 and an external thread 33. The valve body 3 is provided with a sealing convex ring 32. The reset spring 6 is sleeved on the valve stem 4, and the rod head 5 is provided with a sealing ring 51 and a stud 52. The valve stem 4 is provided with a second inner screw groove 40 and a ring hook hole 41. The device body 1 is a pressure vessel safety protection device, which is a prior art. Some existing structures are not drawn and marked, and there is no need to repeat them. The relevant working principles have been recorded in the background technology of this patent.

[0028] Furthermore, the device body 1 described in this patent is a product that occupies a small space as a whole and is lightweight, so that it can be better integrated into various compact devices and systems, meeting the lightweight requirements.

[0029] Moreover, the sealing convex ring 32 and the sealing ring 51 are both made of IIR high-elasticity butyl rubber, which has excellent high elasticity and is a high-performance sealing material, which overall improves the device body 1 to maintain good sealing performance under extreme temperature and pressure conditions.

[0030] In detail, the valve seat 2 is threadedly connected to the external thread 33 via the first internal thread groove 22 , so that the valve body 3 can be easily removed from the valve seat 2 at a later time.

[0031] Furthermore, the sealing convex ring 32 is squeezed and clamped with the sealing ring groove 23. The top cross-section of the sealing convex ring 32 and the sealing ring groove 23 is a ring-shaped structure. When the sealing convex ring 32 is squeezed and inserted into the sealing ring groove 23, the highly elastic sealing convex ring 32 will generate a vertical rebound force, which acts on the first inner thread groove 22 and the outer thread 33 to ensure the sealing degree, and at the same time achieve the anti-loosening effect of the valve body 3 installed on the valve seat 2.

[0032] Furthermore, the valve stem 4 is threadedly connected to the stud 52 via the second inner thread groove 40 , so that the stem head 5 can be easily replaced later.

[0033] In more detail, the pull ring 7 is hooked with the ring hook hole 41. The pull ring 7 can be made of stainless steel elastic metal material used for key rings, which is rolled into an elastic ring-shaped structure. The elastic metal ring made of stainless steel usually has an opening to facilitate the removal and assembly of the pull ring 7 from the ring hook hole 41.

[0034] In general, the two ends of the reset spring 6 are respectively in compression contact with the inner groove wall of the embedded groove 31 and the upper end surface of the rod head 5, which makes it convenient to remove the reset spring 6 from the valve stem 4 from bottom to top later.

[0035] Finally, the rod seal 5 is a conical structure as a whole. The rod seal 5 is in squeeze contact with the embedded gasket 24 through the sealing ring 51 to achieve an extrusion sealing effect on the valve cavity 21.

[0036] Working method: First, rotate the valve body 3 counterclockwise, and through the thread transmission of the first internal screw groove 22 and the external thread 33, drive the valve body 3 to withdraw from the valve seat 2 upward, and then rotate the elastic pull ring 7 along the ring hook hole 41. When the pull ring 7 is completely withdrawn from the ring hook hole 41, it can be easily disassembled. A new pull ring 7 can be easily replaced later;

[0037] Then, the reset spring 6 can be removed from the valve stem 4 from bottom to top, and a new reset spring 6 can be sleeved on the valve stem 4 later to facilitate replacement.

[0038] Furthermore, the rod head 5 is rotated counterclockwise to drive the stud 52 to rotate counterclockwise and exit the second inner screw groove 40, so that a new rod head 5 can be easily replaced later;

[0039] Moreover, the valve stem 4 can also be replaced;

[0040] The above configuration enables the valve stem 4, stem seal 5, pull ring 7 and return spring 6 to be independently and conveniently disassembled and replaced, thereby significantly improving ease of use and maintenance efficiency.

[0041] In addition, the sealing convex ring 32 and the sealing ring 51 are both made of IIR high-elasticity butyl rubber, which has excellent high elasticity and is a high-performance sealing material, which overall improves the device body 1 to maintain good sealing performance under extreme temperature and pressure conditions.

[0042] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure vessel safety protection device, comprising a device body (1), characterized in that: The device body (1) is composed of a valve seat (2), a valve body (3), a valve stem (4), a rod seal (5), a reset spring (6), and a pull ring (7); the valve seat (2) is provided with a valve cavity (21) and a sealing ring groove (23); the valve seat (2) is provided with a first internal screw groove (22) and an embedded sealing gasket (24); the valve body (3) is provided with an embedded groove (31) and an external thread (33); the valve body (3) is provided with a sealing convex ring (32); the reset spring (6) is sleeved on the valve stem (4); the rod seal (5) is provided with a sealing ring (51) and a stud (52); the valve stem (4) is provided with a second internal screw groove (40) and a ring hook hole (41).

2. The pressure vessel safety protection device according to claim 1, characterized in that: The valve seat (2) is threadedly connected to the external thread (33) via a first internal thread groove (22).

3. The pressure vessel safety protection device according to claim 1, characterized in that: The sealing convex ring (32) is squeezed and clamped with the sealing ring groove (23); the top view cross-section of the sealing convex ring (32) and the sealing ring groove (23) is a ring-shaped structure.

4. The pressure vessel safety protection device according to claim 1, characterized in that: The valve stem (4) is threadedly connected to the stud (52) via the second inner thread groove (40).

5. The pressure vessel safety protection device according to claim 1, characterized in that: The pull ring (7) is hooked to the ring hook hole (41).

6. The pressure vessel safety protection device according to claim 1, characterized in that: The two ends of the return spring (6) are respectively in compression contact with the inner groove wall of the embedded groove (31) and the upper end surface of the rod seal head (5).

7. The pressure vessel safety protection device according to claim 1, characterized in that: The rod seal head (5) is a conical structure as a whole, and the rod seal head (5) is in extrusion contact with the embedded seal gasket (24) through the sealing ring (51).

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