Low-temperature-resistant emergency release valve

Abstract

The utility model belongs to the technical field of valves, and discloses a low-temperature-resistant emergency release valve which comprises a valve disc, a first metal ring is coaxially arranged at the lower end of the valve disc, the first metal ring is made of corrosion-resistant and wear-resistant materials, and the first metal ring is fixedly connected to the lower end face of the valve disc; the valve seat is in a shell cylinder shape with two through ends, the valve seat is located at the lower end of the valve disc and coaxially arranged with the valve disc, a second metal ring coaxially arranged is fixed to the upper end of the valve seat and made of corrosion-resistant and wear-resistant materials, and the upper end face of the second metal ring is attached to the lower end face of the first metal ring; one end of the support is horizontally placed and located at the upper end of the valve disc, the other end of the support is vertically and downwards placed and located on one side of the peripheral wall of the valve seat, and a telescopic rod coaxially placed is fixed to the upper end of the valve disc; the problem that the sealing performance of most release valves in the prior art is reduced in a low-temperature environment is solved, and the use risk of the emergency release valve is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and in particular relates to a low-temperature resistant emergency relief valve. Background Art

[0002] The emergency relief valve is a safety device, which is mainly used to quickly release the pressure in the system in an emergency to ensure the safety of equipment and personnel. However, the existing emergency relief valve sealing form mainly adopts FEP film or O-ring to contact and seal with the valve seat and valve disc. However, these two methods have the problem that the material cannot withstand in low temperature environment. When the system is in a low temperature environment, the material of the FEP film or O-ring may become hardened or brittle, resulting in its inability to seal effectively, thereby increasing the failure rate of the emergency relief valve during use; therefore, the relief valves in the prior art mostly have the problem of reduced sealing performance in low temperature environment, which increases the risk of using the emergency relief valve. Utility Model Content

[0003] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a low-temperature resistant emergency relief valve, which solves the problem that most of the relief valves in the prior art have reduced sealing performance in low-temperature environments.

[0004] The purpose of this disclosure can be achieved through the following technical solutions:

[0005] A low temperature resistant emergency relief valve, comprising:

[0006] A valve disc, a first metal ring coaxially arranged at the lower end of the valve disc, the first metal ring is made of a corrosion-resistant and wear-resistant material, and the first metal ring is fixedly connected to the lower end surface of the valve disc;

[0007] The valve seat is in the shape of a shell with two ends connected. The valve seat is located at the lower end of the valve disc and is placed coaxially with it. A second metal ring placed coaxially is fixed to the upper end of the valve seat. The second metal ring is made of corrosion-resistant and wear-resistant material. The upper end surface of the second metal ring fits with the lower end surface of the first metal ring.

[0008] The bracket has one end which is horizontally placed and located on the upper end of the valve disc, and the other end which is vertically placed downward and located on one side of the peripheral wall of the valve seat. A telescopic rod which is coaxially placed is fixed to the upper end of the valve disc, and the other end of the telescopic rod is fixed to the bracket. A connecting plate is fixed to the peripheral wall of the valve seat, and the connecting plate is detachably connected to the bracket.

[0009] The principle and effect of the above technical solution are as follows:

[0010] During operation, when the pressure in the tank has not reached the set pressure, the first metal ring on the valve disc and the second metal ring on the valve seat fit and seal; when the pressure in the tank reaches and exceeds the set pressure, the air pressure pushes the valve disc upward, causing the valve disc to open and release pressure; when the pressure in the tank drops below the set pressure, the valve disc falls again, and the first metal ring and the second metal ring fit and seal again; in the present application, the first metal ring and the second metal ring are used to replace the traditional FEP film or O-ring seal, and the fit and seal between the first metal ring and the second metal ring are less affected by temperature, which can improve the adaptability to low temperature environment.

[0011] The outer diameter of the first metal ring is equal to the outer diameter of the second metal ring, a sponge ring is fixed at the lower end of the valve disc, the inner diameter of the sponge ring is equal to the outer diameter of the first metal ring, and the height of the lower end surface of the sponge ring is lower than that of the lower end surface of the first metal ring;

[0012] A circular ring-shaped protrusion is provided at the lower end of the first metal ring, and a circular ring groove matching the protrusion at the lower end of the first metal ring is provided at the upper end of the second metal ring;

[0013] A spring is sleeved on the telescopic rod, one end of the spring is fixed to the valve disc, and the other end of the spring is fixed to the bracket;

[0014] There are ear plates on both sides of the connecting plate, the ear plates are fixed to the brackets, and the ear plates on both sides and the connecting plate are connected by bolts;

[0015] The material of the first metal ring is tungsten carbide, cobalt-based alloy or nickel-based alloy;

[0016] The material of the second metal ring is tungsten carbide, cobalt-based alloy or nickel-based alloy;

[0017] The inner wall of the annular groove is coated with lubricating oil.

[0018] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0019] Connection: refers to the process of connecting two separate profiles or parts into a complex part or component using fasteners such as screws, bolts and rivets.

[0020] Detachable connection: refers to a design that allows two or more components to be easily connected and separated when necessary.

[0021] Beneficial effects of the present disclosure:

[0022] 1. During operation, when the pressure in the tank has not reached the set pressure, the first metal ring on the valve disc and the second metal ring on the valve seat are fitted and sealed; when the pressure in the tank reaches and exceeds the set pressure, the air pressure pushes the valve disc upward, so that the valve disc opens to release the pressure; when the pressure in the tank drops below the set pressure, the valve disc falls again, and the first metal ring and the second metal ring are fitted and sealed again; in this application, the first metal ring and the second metal ring are used to replace the traditional FEP film or O-ring seal, and the fitting seal between the first metal ring and the second metal ring is less affected by temperature, which can improve the adaptability to low temperature environment and reduce the risk of using the emergency relief valve.

[0023] 2. The protrusion at the lower end of the first metal ring cooperates with the circular groove at the upper end of the second metal ring to improve the sealing performance of the first metal ring and the second metal ring when they are fitted together; at the same time, the sponge ring is provided to keep the first metal ring and the second metal ring dry, and prevent water vapor from freezing at the contact part of the first metal ring and the second metal ring at low temperature;

[0024] 3. The coordination of the telescopic rod and the spring can improve the guidance of the valve disc movement and facilitate the automatic downward movement and reset of the valve disc after it is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present disclosure;

[0027] Figure 2 is a partial structural schematic diagram of an embodiment of the present disclosure;

[0028] Figure 3 is a cross-sectional view of a valve disc and a valve seat of an embodiment of the present disclosure;

[0029] Figure 4 4 is a cross-sectional view of the valve seat and the second metal ring of the embodiment of the present disclosure. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0031] Combined with this Figures 1 to 4An embodiment of a low temperature resistant emergency relief valve is described. Specifically, the low-temperature resistant emergency relief valve is constructed as a split structure, which has seven components, namely a valve disc 100, a first metal ring 200, a valve seat 300, a second metal ring 400, a bracket 500, a telescopic rod 600 and a connecting plate 700. During operation, when the pressure in the tank has not reached the set pressure, the first metal ring 200 on the valve disc 100 and the second metal ring 400 on the valve seat 300 are fitted and sealed; when the pressure in the tank reaches and exceeds the set pressure, the air pressure pushes the valve disc 100 upward, so that the valve disc 100 opens to release the pressure; when the pressure in the tank drops below the set pressure, the valve disc 100 falls again, and the first metal ring 200 and the second metal ring 400 are fitted and sealed again; in the present application, the first metal ring 200 and the second metal ring 400 are used to replace the traditional FEP film or O-ring seal, and the fitting seal between the first metal ring 200 and the second metal ring 400 is less affected by temperature, which can improve the adaptability to low-temperature environment.

[0032] Please refer to Figures 1 to 4 , a low temperature resistant emergency relief valve, comprising:

[0033] The valve disc 100 has a first metal ring 200 coaxially arranged at the lower end of the valve disc 100. The first metal ring 200 is made of a corrosion-resistant and wear-resistant material and is fixedly connected to the lower end surface of the valve disc 100.

[0034] The valve seat 300 is in the shape of a shell with two ends connected. The valve seat 300 is located at the lower end of the valve disc 100 and is placed coaxially therewith. A second metal ring 400 placed coaxially therewith is fixed to the upper end of the valve seat 300. The second metal ring 400 is made of a corrosion-resistant and wear-resistant material. The upper end surface of the second metal ring 400 is in contact with the lower end surface of the first metal ring 200.

[0035] A bracket 500, one end of the bracket 500 is horizontally placed and located at the upper end of the valve disc 100, and the other end of the bracket 500 is vertically placed downward and located at one side of the peripheral wall of the valve seat 300. A telescopic rod 600 placed coaxially is fixed to the upper end of the valve disc 100, and the other end of the telescopic rod 600 is fixed to the bracket 500. A connecting plate 700 is fixed to the peripheral wall of the valve seat 300, and the connecting plate 700 is detachably connected to the bracket 500;

[0036] The first metal ring 200 can be made of tungsten carbide, cobalt-based alloy or nickel-based alloy, etc. Its excellent corrosion resistance and wear resistance ensure the long-term reliability of the sealing system. The first metal ring 200 can adopt advanced PVD surface coating technology to enhance surface hardness and wear resistance and improve the sealing effect.

[0037] The telescopic rod 600 is a key component at the upper end of the valve disc 100 and has the function of adjusting the opening and closing positions of the valve disc 100. It can be made of high-strength alloy steel to ensure its stability and reliability when subjected to pressure and load. At the same time, the telescopic rod 600 can be precision machined and heat treated, with a smooth and wear-resistant surface, thereby ensuring the flexibility and smoothness of the operation of the valve disc 100.

[0038] The connecting plate 700, as a key connecting component between the bracket 500 and the valve seat 300, is made of stainless steel alloy to ensure a firm structure and excellent corrosion resistance. Its surface is polished to reduce surface roughness, and an anti-corrosion coating is used to enhance durability, ensuring the stability and durability of the system operation.

[0039] Preferably, the first metal ring 200 can be fixedly connected to the lower end of the valve disc 100 by surfacing welding; the second metal ring 400 can be fixed to the valve seat 300 by surfacing welding;

[0040] Preferably, the emergency relief valve is subjected to cryogenic treatment as a whole so as to adapt to the low temperature environment;

[0041] During operation, when the pressure in the tank has not reached the set pressure, the first metal ring 200 on the valve disc 100 and the second metal ring 400 on the valve seat 300 are fitted and sealed; when the pressure in the tank reaches and exceeds the set pressure, the air pressure pushes the valve disc 100 upward, so that the valve disc 100 opens and releases the pressure; when the pressure in the tank drops below the set pressure, the valve disc 100 falls again, and the first metal ring 200 and the second metal ring 400 are fitted and sealed again; in the present application, the first metal ring 200 and the second metal ring 400 are used to replace the traditional FEP film or O-ring seal, and the fitting seal between the first metal ring 200 and the second metal ring 400 is less affected by temperature, which can improve the adaptability to low-temperature environments and reduce the risk of using the emergency relief valve.

[0042] The outer diameter of the first metal ring 200 is equal to the outer diameter of the second metal ring 400, a sponge ring 800 is fixed to the lower end of the valve disc 100, the inner diameter of the sponge ring 800 is equal to the outer diameter of the first metal ring 200, and the height of the lower end surface of the sponge ring 800 is lower than the height of the lower end surface of the first metal ring 200; by the provision of the sponge ring 800, water vapor on the outer wall close to the first metal ring 200 and the second metal ring 400 can be adsorbed, and after the first metal ring 200 and the second metal ring 400 are attached, the sponge ring 800 can keep the contact point of the first metal ring 200 and the second metal ring 400 dry, so as to prevent water vapor from freezing at the contact point of the first metal ring 200 and the second metal ring 400 at low temperature.

[0043] In order to improve the sealing performance when the first metal ring 200 and the second metal ring 400 are fitted together, a circular ring-shaped protrusion is provided at the lower end of the first metal ring 200, and a circular ring groove 401 matching the protrusion at the lower end of the first metal ring 200 is opened at the upper end of the second metal ring 400; when the first metal ring 200 and the second metal ring 400 are fitted together, the protrusion at the lower end of the first metal ring 200 is inserted into the circular ring groove 401 at the upper end of the second metal ring 400, thereby improving the sealing performance of the fitting between the first metal ring 200 and the second metal ring 400.

[0044] In order to facilitate the automatic downward movement and reset of the valve disc 100 after opening, a spring 900 is sleeved on the telescopic rod 600, one end of the spring 900 is fixed to the valve disc 100, and the other end of the spring 900 is fixed to the bracket 500; when the pressure in the tank reaches and exceeds the set pressure, the air pressure pushes the valve disc 100 to move upward, and the valve disc 100 pushes the telescopic rod 600 and the spring 900 to compress, so that the valve disc 100 is opened; when the pressure in the tank drops below the set pressure, the spring 900 pushes the valve disc 100 to automatically move downward and reset under the action of the elastic force of the spring 900;

[0045] When the pressure in the tank reaches the set pressure, the thrust of the gas pressure in the tank on the valve disc 100 is equal to the elastic force of the spring 900 on the valve disc 100.

[0046] Ear plates 701 are provided on both sides of the connecting plate 700, and the ear plates 701 are fixed to the bracket 500. The ear plates 701 on both sides and the connecting plate 700 are connected by bolts 702, which facilitates the disassembly and assembly of the connecting plate 700 and the bracket 500, and facilitates the subsequent maintenance and replacement of the valve seat 300.

[0047] The material of the first metal ring 200 is tungsten carbide, cobalt-based alloy or nickel-based alloy;

[0048] The material of the second metal ring 400 is tungsten carbide, cobalt-based alloy or nickel-based alloy;

[0049] Preferably, both the first metal ring 200 and the second metal ring 400 may be subjected to PVD surface coating technology to enhance surface hardness and wear resistance and improve sealing effect.

[0050] The inner wall of the annular groove 401 is coated with lubricating oil, which reduces the wear between the first metal ring 200 and the second metal ring 400, and improves the sealing performance when the first metal ring 200 and the second metal ring 400 are attached.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above shows and describes the basic principles, main features and advantages of the present disclosure. Those skilled in the art should understand that the present disclosure is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present disclosure. Without departing from the spirit and scope of the present disclosure, the present disclosure may have various changes and improvements, and these changes and improvements fall within the scope of the present disclosure to be protected.

Claims

1. A low temperature resistant emergency relief valve, characterized in that: include: A valve disc (100), wherein a first metal ring (200) is coaxially arranged at the lower end of the valve disc (100), the first metal ring (200) is made of a corrosion-resistant and wear-resistant material, and the first metal ring (200) is fixedly connected to the lower end surface of the valve disc (100); The valve seat (300) is in the shape of a shell with two ends connected. The valve seat (300) is located at the lower end of the valve disc (100) and is placed coaxially therewith. A second metal ring (400) placed coaxially therewith is fixed to the upper end of the valve seat (300). The second metal ring (400) is made of a corrosion-resistant and wear-resistant material. The upper end surface of the second metal ring (400) is in contact with the lower end surface of the first metal ring (200). A bracket (500), one end of the bracket (500) is horizontally placed and located on the upper end of the valve disc (100), the other end of the bracket (500) is vertically placed downward and located on one side of the peripheral wall of the valve seat (300), a telescopic rod (600) placed coaxially is fixed to the upper end of the valve disc (100), the other end of the telescopic rod (600) is fixed to the bracket (500), a connecting plate (700) is fixed to the peripheral wall of the valve seat (300), and the connecting plate (700) is detachably connected to the bracket (500).

2. A low temperature resistant emergency relief valve according to claim 1, characterized in that: The outer diameter of the first metal ring (200) is equal to the outer diameter of the second metal ring (400); a sponge ring (800) is fixed to the lower end of the valve disc (100); the inner diameter of the sponge ring (800) is equal to the outer diameter of the first metal ring (200); and the height of the lower end surface of the sponge ring (800) is lower than the height of the lower end surface of the first metal ring (200).

3. A low temperature resistant emergency relief valve according to claim 2, characterized in that: The lower end of the first metal ring (200) is provided with a circular protrusion, and the upper end of the second metal ring (400) is provided with a circular groove (401) adapted to the protrusion at the lower end of the first metal ring (200).

4. A low temperature resistant emergency relief valve according to claim 3, characterized in that: A spring (900) is sleeved on the telescopic rod (600), one end of the spring (900) is fixed to the valve disc (100), and the other end of the spring (900) is fixed to the bracket (500).

5. A low temperature resistant emergency relief valve according to claim 4, characterized in that: Ear plates (701) are provided on both sides of the connecting plate (700), and the ear plates (701) are fixed to the bracket (500). The ear plates (701) on both sides and the connecting plate (700) are connected by bolts (702).

6. A low temperature resistant emergency relief valve according to claim 1, characterized in that: The material of the first metal ring (200) is tungsten carbide, cobalt-based alloy or nickel-based alloy.

7. A low temperature resistant emergency relief valve according to claim 1, characterized in that: The material of the second metal ring (400) is tungsten carbide, cobalt-based alloy or nickel-based alloy.

8. A low temperature resistant emergency relief valve according to claim 3, characterized in that: The inner wall of the annular groove (401) is smeared with lubricating oil.

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