A pressure relief valve for rapid decompression
By introducing a vertical linear drive device and a pressure gauge in a coordinated design in the pressure relief valve, the problem of lag response in traditional pressure relief valves is solved, enabling rapid pressure reduction and real-time monitoring, ensuring stable system pressure and preventing equipment damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI HUALING ELECTRIC EQUIP CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-02
AI Technical Summary
Existing pressure relief valves cannot open quickly when system pressure rises sharply, resulting in untimely pressure release and increasing the risk of equipment damage. At the same time, they lack real-time monitoring functions, which can easily lead to excessive or insufficient pressure release.
A pressure relief valve for rapid pressure reduction was designed. It adopts a vertical linear drive device and a pressure gauge to work together to monitor the system pressure changes in real time. When the pressure rises sharply, the movable valve shell is quickly activated, and the release hole and docking hole are instantly aligned to achieve rapid pressure relief. The negative pressure intake component balances the pressure difference inside and outside the pipeline during the pressure relief process, which helps to reduce pressure rapidly.
It achieves timely and accurate pressure release, avoids equipment damage due to overpressure, ensures stable system pressure, avoids excessive or insufficient pressure release, and guarantees safe system operation.
Smart Images
Figure CN224315550U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the technical field of pressure relief valves, and more specifically, to a pressure relief valve for rapid pressure reduction. Background Technology
[0002] In industrial production, pressure relief valves are widely used in pressure-bearing equipment such as boilers, pressure vessels, and pipelines, serving as crucial components for ensuring the safe operation of equipment and systems. When the internal pressure of the system exceeds a set threshold, the pressure relief valve must open quickly to release pressure, preventing serious accidents such as equipment rupture or leakage due to overpressure. However, existing pressure relief valves have significant shortcomings in practical applications.
[0003] Traditional pressure relief valves mostly employ spring-loaded or counterweight-type structures, relying on pressure to overcome the spring force or the weight of the counterweight during opening, resulting in a relatively delayed response mechanism. When system pressure rises sharply, these valves cannot open quickly enough, leading to delayed pressure release and increasing the risk of equipment damage. Furthermore, most pressure relief valves lack real-time pressure monitoring capabilities after opening and releasing pressure, failing to dynamically adjust the valve opening according to system pressure fluctuations. This can easily lead to over- or insufficient pressure release, wasting media and failing to effectively ensure system pressure stability. With the increasing automation and intelligence of industrial production, higher demands are placed on the rapid response capabilities and real-time pressure monitoring functions of pressure relief valves. Developing a pressure relief valve capable of rapid pressure reduction and continuous pressure monitoring is urgently needed. Utility Model Content
[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a pressure relief valve for rapid pressure reduction, which solves the technical problem that traditional pressure relief valves in the prior art mostly adopt spring loading or counterweight structure, and when the system pressure rises sharply, these valves cannot open quickly in a short time, resulting in the pressure not being released in time.
[0005] According to one aspect, at least one embodiment of the present disclosure provides a pressure relief valve for rapid pressure reduction, characterized in that it comprises:
[0006] The assembly includes a connecting pipe, a flange, and a fixed valve body, wherein the flange is fixed to the connecting pipe, and the fixed valve body is disposed at the upper end of the connecting pipe;
[0007] The movable valve housing is movably fitted outside the fixed valve housing, and the release switch assembly is disposed between the fixed valve housing and the movable valve housing;
[0008] A secondary pipe and a negative pressure air intake assembly, wherein the secondary pipe is fixed on the connecting pipe and is horizontally connected, and the negative pressure air intake assembly is disposed on the secondary pipe;
[0009] The release switch assembly includes several release holes, which are formed around the outer surface of the movable valve housing. The fixed valve housing and the movable valve housing are connected by a vertical linear drive. Several mating holes are formed around the side surface of the fixed valve housing. A pressure gauge is installed on the top of the movable valve housing.
[0010] As a further technical solution, an outer sleeve is provided at the top of the movable valve housing, the outer sleeve is fitted and connected to the lower end of the pressure gauge, and a disc is provided at the lower end of the outer sleeve, with several through holes on the surface of the disc.
[0011] As a further technical solution, the negative pressure air intake assembly includes an air intake hood, which is fixed to one end of the secondary pipe. Several round rods are arranged inside the air intake hood, and an air intake port is opened on the side surface of the air intake hood.
[0012] As a further technical solution, a sealing plate is movably connected to the round rod, and a pressure spring is also fitted onto the round rod. The cross-section of the air inlet and the sealing plate contact area are both stepped structures.
[0013] As a further technical solution, a mating groove is provided at the bottom of the fixed valve housing, and the inner diameter of the mating groove matches the outer diameter of the disc.
[0014] As a further technical solution, a number of uprights are provided around the top of the movable valve housing, and an annular strip is provided at the lower end of the uprights. The annular strip is sealed and fitted around the inner wall of the fixed valve housing.
[0015] As a further technical solution, sealing strips are provided on both the inner and outer surfaces of the fixed valve housing, and the cross-section of the sealing strips has a boss-shaped structure.
[0016] As a further technical solution, a battery pack and a controller are provided on the top of the movable valve housing.
[0017] The beneficial effects of the embodiments disclosed herein are as follows:
[0018] In this disclosure, the release switch assembly solves the problem of lag response in traditional pressure relief valves through the coordinated design of a vertical linear drive device and a pressure gauge. The pressure gauge monitors the system pressure in real time. When the pressure rises sharply, the controller can quickly activate the vertical linear drive device, causing the movable valve body to move upward rapidly, instantly aligning the release port with the docking port, allowing high-pressure gas to be discharged quickly. This avoids the opening delay caused by the need to overcome elasticity or gravity in traditional spring-loaded or counterweight structures, ensuring timely pressure release and effectively reducing the risk of equipment damage due to overpressure. Simultaneously, the pressure gauge continuously provides feedback on pressure changes during the pressure relief process, allowing operators to monitor the system status and achieve precise control of the pressure relief process, avoiding excessive or insufficient pressure relief and ensuring stable system pressure. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0020] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;
[0021] Figure 2 This is an isometric drawing of the present disclosure;
[0022] Figure 3 This is an isometric sectional view of the present disclosure;
[0023] Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle;
[0024] In the diagram: 1. Connecting pipe; 2. Flange; 3. Fixed valve body; 4. Movable valve body; 5. Secondary pipe; 6. Release switch assembly; 6-1. Release hole; 6-2. Connecting hole; 6-3. Pressure gauge; 6-4. Outer sleeve; 6-5. Disc; 6-6. Through hole; 7. Negative pressure air intake assembly; 7-1. Air intake hood; 7-2. Round rod; 7-3. Air inlet; 7-4. Sealing plate; 7-5. Pressure spring; 8. Connecting groove; 9. Upright rod; 10. Annular strip; 11. Sealing strip; 12. Battery pack; 13. Controller. Detailed Implementation
[0025] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0026] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0028] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0031] like Figures 1-4 As shown, a pressure relief valve for rapid pressure reduction in one embodiment of this disclosure is illustrated, comprising:
[0032] The assembly includes a connecting pipe 1, a flange 2, and a fixed valve body 3. The flange 2 is fixed to the connecting pipe 1, and the fixed valve body 3 is located at the upper end of the connecting pipe 1.
[0033] The movable valve housing 4 and the release switch assembly 6 are provided. The movable valve housing 4 is movably fitted outside the fixed valve housing 3, and the release switch assembly 6 is disposed between the fixed valve housing 3 and the movable valve housing 4.
[0034] The secondary pipe 5 and the negative pressure air intake assembly 7 are provided. The secondary pipe 5 is fixed on the docking pipe 1 and is connected laterally. The negative pressure air intake assembly 7 is provided on the secondary pipe 5.
[0035] The release switch assembly 6 includes several release holes 6-1, which are formed around the outer surface of the movable valve housing 4. The fixed valve housing 3 and the movable valve housing 4 are connected by a vertical linear drive. Several mating holes 6-2 are formed around the side surface of the fixed valve housing 3. A pressure gauge 6-3 is installed on the top of the movable valve housing 4. An outer sleeve 6-4 is provided inside the top of the movable valve housing 4. The outer sleeve 6-4 is fitted and connected to the lower end of the pressure gauge 6-3. A disc 6-5 is provided at the lower end of the outer sleeve 6-4. Several through holes 6-6 are formed on the surface of the disc 6-5.
[0036] In some examples, a release switch assembly 6 is designed to achieve rapid pressure release and real-time monitoring. The release port 6-1 on the outside of the movable valve housing 4 and the mating hole 6-2 on the side surface of the fixed valve housing 3 form a pressure release channel. When the system pressure rises, the pressure gauge 6-3 at the top inside the movable valve housing 4 monitors the pressure change in real time, and the pressure data is displayed intuitively on the dial, allowing operators to monitor the system pressure status at any time. Once the pressure exceeds the set threshold, the vertical linear drive device is activated, pushing the movable valve housing 4 downwards, precisely aligning the release port 6-1 with the mating hole 6-2. The previously closed channel opens instantly, allowing the high-pressure gas in the system to be quickly discharged, achieving rapid pressure reduction. Simultaneously, the pressure gauge 6-3 continues to operate, providing real-time feedback on pressure changes during the pressure relief process, facilitating operators' judgment of the pressure reduction process and system pressure recovery. The design of the outer casing 6-4 and the disc 6-5 not only protects the pressure gauge 6-3 but also ensures the accuracy and timeliness of pressure detection through the through hole 6-6 on the disc 6-5, ensuring the efficient operation of the release switch assembly 6.
[0037] like Figures 1-4 As shown in the figure, the negative pressure air intake assembly 7 in this embodiment includes an air intake hood 7-1, which is fixed to one end of the secondary pipe 5. Several round rods 7-2 are provided inside the air intake hood. An air intake port 7-3 is opened on the side surface of the air intake hood. A sealing plate 7-4 is movably connected to the round rod 7-2. A pressure spring 7-5 is connected to each round rod 7-2. The cross-section of the air intake port 7-3 and the sealing plate 7-4 at the contact point is a stepped structure.
[0038] In some examples, a negative pressure intake assembly 7 is designed to assist the system in rapidly reducing pressure. The intake hood is fixed to one end of the secondary pipe 5. The stepped structure at the junction of the intake port 7-3 and the sealing plate 7-4, under normal conditions, relies on the elasticity of the pressure spring 7-5 to keep the sealing plate 7-4 tightly fitted to the intake port 7-3, preventing outside air from entering the system. When the internal pressure of the system is rapidly released, a negative pressure environment is formed inside the pipe. When the negative pressure value reaches the critical value of the pressure spring 7-5, the suction force generated by the negative pressure overcomes the spring force, pulling the sealing plate 7-4 to slide along the round rod 7-2, causing the sealing plate 7-4 to separate from the intake port 7-3, allowing outside air to quickly enter the pipe through the intake port 7-3.
[0039] This design can actively introduce air when the system depressurizes, balance the pressure difference inside and outside the pipeline, accelerate the pressure release process, avoid damage to equipment due to excessive negative pressure, and ensure that the pressure relief valve can work stably and efficiently under different operating conditions.
[0040] For example, such as Figure 3 As shown, a mating groove 8 is provided at the bottom of the fixed valve housing 3, and the inner diameter of the mating groove 8 matches the outer diameter of the disc 6-5.
[0041] In some examples, the mating groove 8 at the bottom of the fixed valve housing 3 matches the size of the disc 6-5. When the movable valve housing 4 moves downward to reset under vertical linear drive, the disc 6-5 can be precisely embedded in the mating groove 8, which can concentrate the released pressure at the sensor of the pressure gauge 6-3, and can detect pressure changes more intuitively and sensitively.
[0042] For example, such as Figure 3 As shown, a number of uprights 9 are arranged around the top of the movable valve housing 4, and an annular strip 10 is provided at the lower end of the uprights 9. The annular strip 10 is sealed and fitted around the inner wall of the fixed valve housing 3.
[0043] In some examples, the uprights 9 and the annular strips 10 arranged around the top of the movable valve housing 4 play a sealing role as the movable valve housing 4 moves along the fixed valve housing 3. The annular strips 10 are sealed and fitted to the inner wall of the fixed valve housing 3, which can effectively prevent the medium in the system from leaking from the gap between the movable valve housing 4 and the fixed valve housing 3, improve the overall sealing performance of the valve, ensure smooth and efficient pressure release, and extend the service life of key valve components.
[0044] For example, such as Figure 3 As shown, sealing strips 11 are provided on both the inner and outer surfaces of the fixed valve housing 3, and the cross-section of the sealing strip 11 is a boss-shaped structure.
[0045] In some examples, the boss-shaped sealing strip 11 provided on the inner and outer surfaces of the fixed valve body 3 enhances the sealing effect through its structure. When the movable valve body 4 and the fixed valve body 3 are engaged, the boss-shaped sealing strip 11 undergoes elastic deformation under compression, tightly filling the gaps between the components and effectively preventing media leakage. This not only ensures the sealing performance of the pressure relief valve under different operating conditions, but also reduces the wear on the sealing components caused by frequent opening and closing, thereby improving the reliability and durability of the valve.
[0046] For example, such as Figure 1 As shown, a battery pack 12 and a controller 13 are provided on the top of the movable valve housing 4.
[0047] In some examples, the battery pack 12 mounted on top of the movable valve housing 4, together with the controller 13, forms the intelligent control core of the pressure relief valve. The battery pack 12 provides stable power support for electrical components such as the pressure gauge 6-3 and the vertical linear drive device, ensuring the continuous operation of each functional module of the valve. The controller 13 receives pressure data transmitted from the pressure gauge 6-3 in real time and judges the system pressure status through a preset program. When the pressure exceeds the set threshold, the controller 13 immediately issues a command to start the vertical linear drive device, controlling the movable valve housing 4 to open and release pressure. During the pressure release process, the drive strategy is continuously adjusted according to the pressure change data, realizing intelligent and precise control of pressure release and providing reliable protection for the safe operation of the system.
[0048] In actual use: The pressure gauge 6-3 on the top of the movable valve housing 4 is electrically connected to the battery pack 12 and the controller 13. When the system pressure rises, the pressure gauge 6-3 monitors the pressure change in real time and transmits the data to the controller 13. If the pressure exceeds the set threshold, the controller 13 activates the vertical linear drive device between the fixed valve housing 3 and the movable valve housing 4, pushing the movable valve housing 4 downward so that the release hole 6-1 on the outside of the movable valve housing 4 is precisely aligned with the mating hole 6-2 on the side surface of the fixed valve housing 3. At this time, the high-pressure gas in the system is quickly discharged through the channel formed by the release hole 6-1 and the mating hole 6-2, achieving rapid pressure reduction.
[0049] During the pressure relief process, the pressure gauge 6-3 continuously monitors the pressure. When the system pressure drops, causing a negative pressure to form in the pipeline, the sealing plate 7-4 of the negative pressure intake assembly 7 overcomes the elastic force of the pressure spring 7-5 under the action of negative pressure suction and slides along the round rod 7-2, opening the air inlet 7-3. Outside air enters the system through the air inlet 7-3 and the secondary pipeline 5, balancing the pressure difference inside and outside the pipeline and accelerating the pressure release process. After the pressure returns to normal, the vertical linear drive device drives the movable valve shell 4 to reset, and the release hole 6-1 is misaligned with the docking hole 6-2, closing the pressure relief channel.
[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A pressure relief valve for rapid pressure reduction, characterized in that, include: The assembly includes a connecting pipe (1), a flange (2), and a fixed valve body (3), wherein the flange (2) is fixed on the connecting pipe (1), and the fixed valve body (3) is disposed at the upper end of the connecting pipe (1); The movable valve housing (4) and the release switch assembly (6) are provided. The movable valve housing (4) is movably fitted outside the fixed valve housing (3), and the release switch assembly (6) is disposed between the fixed valve housing (3) and the movable valve housing (4). A secondary pipe (5) and a negative pressure air intake assembly (7) are provided. The secondary pipe (5) is fixed on the connecting pipe (1). The secondary pipe (5) is horizontally connected. The negative pressure air intake assembly (7) is provided on the secondary pipe (5). The release switch assembly (6) includes several release holes (6-1), which are formed around the outer surface of the movable valve housing (4). The fixed valve housing (3) and the movable valve housing (4) are connected by a vertical linear drive. Several docking holes (6-2) are formed around the side surface of the fixed valve housing (3). A pressure gauge (6-3) is installed on the top of the movable valve housing (4).
2. The pressure relief valve for rapid pressure reduction according to claim 1, characterized in that, The movable valve housing (4) is provided with an outer sleeve (6-4) at the top. The outer sleeve (6-4) is fitted and connected to the lower end of the pressure gauge (6-3). The lower end of the outer sleeve (6-4) is provided with a disc (6-5). The surface of the disc (6-5) is provided with several through holes (6-6).
3. The pressure relief valve for rapid pressure reduction according to claim 1, characterized in that, The negative pressure air intake assembly (7) includes an air intake hood (7-1), which is fixed to one end of the secondary pipe (5). Several round rods (7-2) are provided inside the air intake hood (7-1), and an air intake port (7-3) is opened on the side surface of the air intake hood (7-1).
4. A pressure relief valve for rapid pressure reduction according to claim 3, characterized in that, A sealing plate (7-4) is movably connected to the round rod (7-2), and a pressure spring (7-5) is also connected to the round rod (7-2). The cross-section of the air inlet (7-3) and the sealing plate (7-4) at the contact point is a stepped structure.
5. A pressure relief valve for rapid pressure reduction according to claim 2, characterized in that, The bottom of the fixed valve housing (3) is provided with a mating groove (8), the inner diameter of which matches the outer diameter of the disc (6-5).
6. A pressure relief valve for rapid pressure reduction according to claim 1, characterized in that, The movable valve housing (4) has several uprights (9) arranged around the top circumference. The lower end of the uprights (9) is provided with an annular strip (10), and the annular strip (10) is sealed and fitted around the inner wall of the fixed valve housing (3).
7. A pressure relief valve for rapid pressure reduction according to claim 1, characterized in that, The fixed valve housing (3) is provided with sealing strips (11) on both its inner and outer surfaces. The sealing strips (11) have a boss-shaped cross-section.
8. A pressure relief valve for rapid pressure reduction according to claim 1, characterized in that, The top of the movable valve housing (4) is provided with a battery pack (12) and a controller (13).