Dynamic proportional pressure relief device for pressure vessel
By setting a balance chamber and a balance piston in the pressure vessel and using the pressure provided by the dynamic variable pump, dynamic proportional pressure relief to the pressure vessel is achieved, solving the problems of fluctuations in the pressure relief speed and poor stability in the prior art, and improving the stability of the pressure relief system.
Patent Information
- Application Number
- CN202421547239.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The existing pressure vessel pressure relief technology has problems such as fluctuation in the pressure relief speed and poor stability, resulting in pressure relief hysteresis and system instability.
By setting a balance chamber between the pressure relief end of the pressure vessel and the pressure replenishment end, and sliding the balance piston in the balance chamber, the dynamic balance between the pressure provided by the dynamic variable pump and the pressure inside the pressure vessel is controlled to open or block the pressure relief port to achieve dynamic proportional pressure relief.
It effectively avoids large fluctuations in the pressure relief speed, ensures the smooth pressure relief of the pressure vessel, and improves the stability of the pressure relief system.
Smart Images
Figure CN223049842U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pressure relief of pressure vessels, and relates to a dynamic proportional pressure relief device for pressure vessels. Background Technique
[0002] Pressure vessels are used to store high-pressure fluids, and the internal pressure thereof is usually above 100 Mpa. When pressure relief is performed on a pressure vessel, in the prior art, pressure relief valves of different caliber specifications are usually combined, and the opening and closing of several pressure relief valves are controlled by setting the pressure difference between the set pressure and the actual pressure time, so as to realize the pressure relief operation of pressure ventilation. However, the above pressure relief structure has the following disadvantages:
[0003] First, the control of several coupled pressure relief valves has a delay, and the delay time of several pressure relief valves will cause the pressure relief of the pressure vessel to lag after being superimposed; second, directly controlling the opening and closing of the pressure relief valve for pressure relief easily causes a large fluctuation in the pressure relief speed, thereby affecting the stability of the pressure vessel and the pressure relief system.
[0004] Therefore, in view of the above technical problems existing in the prior art of directly performing pressure relief on a pressure vessel by combining several pressure relief valves, the utility model discloses a dynamic proportional pressure relief device for pressure vessels. Content of the Utility Model
[0005] The purpose of the utility model is to provide a dynamic proportional pressure relief device for pressure vessels, which controls the pressure vessel to perform dynamic and stable pressure relief through the dynamic balance between the unloading pressure of the pressure relief valve and the supplementary pressure of the dynamic variable pump, and avoids large fluctuations in the pressure relief speed during the whole pressure relief process.
[0006] The utility model is realized by the following technical solutions:
[0007] A dynamic proportional pressure relief device for pressure vessels, comprising a pressure vessel and a pressure controller, the pressure vessel includes a pressure relief end and a pressure supplement end, the pressure relief end is connected with a pressure relief valve group, the pressure supplement end is connected with a dynamic variable pump, a balance cavity is arranged inside the pressure vessel between the pressure relief end and the pressure supplement end, a balance piston is arranged inside the balance cavity, one end of the balance piston is communicated with the inside of the pressure vessel, and the other end of the balance piston is communicated with the pressure supplement end; a pressure relief port connected with the pressure relief end is arranged on the side wall of the balance cavity, the balance piston opens or blocks the pressure relief port through its own movement, and the pressure controller is connected with the pressure relief valve group and the dynamic variable pump.
[0008] The first pressure inside the pressure vessel acts on one end of the balance piston, and the second pressure provided by the dynamic variable pump acts on the other end of the balance piston through the pressure replenishing end. In the balanced state, the first pressure is equal to the second pressure. At this time, the balance piston is in a balanced state and blocks the pressure relief port on the wall of the balance chamber. When it is necessary to relieve the pressure of the pressure vessel, the second pressure provided by the dynamic variable pump decreases. At this time, the first pressure is greater than the second pressure, causing the balance piston to move to open the pressure relief port, and the pressure relief valve group opens. At this time, the fluid inside the pressure vessel flows out through the pressure relief port and the pressure relief valve to relieve the pressure of the pressure vessel.
[0009] During the pressure relief process, by monitoring the first pressure and the second pressure in real time, and then dynamically adjusting the second pressure. When the second pressure increases, the opening degree of the pressure relief port decreases; when the second pressure decreases, the opening degree of the pressure relief port increases, so as to perform dynamic proportional pressure relief according to the real-time pressure inside the pressure vessel.
[0010] In order to better implement the present utility model, further, a first pressure sensor is arranged inside the pressure vessel, a second pressure sensor is arranged at the pressure replenishing end, and both the first pressure sensor and the second pressure sensor are connected to a pressure controller.
[0011] In order to better implement the present utility model, further, an elastic flow guiding member is arranged inside the balance chamber corresponding to the pressure replenishing end, and a plurality of flow guiding holes are arranged on the elastic flow guiding member.
[0012] In order to better implement the present utility model, further, the elastic flow guiding member includes a spring and a flow guiding disc. The flow guiding disc is slidably arranged inside the balance chamber. One side of the flow guiding disc close to the pressure replenishing end is connected to the inner wall of the balance chamber through a spring, and a plurality of flow guiding holes are circumferentially arranged on the flow guiding disc.
[0013] In order to better implement the present utility model, further, the flow guiding hole is a tapered hole. The small diameter end of the tapered hole is arranged corresponding to the pressure replenishing end, and the large diameter end of the tapered hole is arranged corresponding to one end of the balance piston.
[0014] In order to better implement the present utility model, further, the pressure relief valve group includes a first pressure relief valve, a second pressure relief valve, and a third pressure relief valve. The first pressure relief valve, the second pressure relief valve, and the third pressure relief valve are connected in parallel to the pressure relief end in sequence.
[0015] In order to better implement the present utility model, further, a liquid supply station is also included. The outlet end of the pressure relief valve group is connected to the liquid supply station, and the inlet end of the dynamic variable pump is connected to the liquid supply station.
[0016] Compared with the prior art, the present utility model has the following advantages and beneficial effects:
[0017] The utility model sets a balance cavity between the pressure relief end and the pressure compensation end of a pressure vessel, and slidably arranges a balance piston inside the balance cavity. By applying a first pressure inside the pressure vessel to one end of the balance piston and applying a second pressure provided by a variable displacement pump to the other end of the balance piston, and then by controlling the second pressure output by the variable displacement pump, the pressure difference between the first pressure and the second pressure changes. The change in the pressure difference drives the balance piston to move to open the pressure relief port and adjust the opening degree of the pressure relief port. Moreover, it can dynamically adjust the second pressure output by the variable displacement pump according to the real-time pressure in the pressure vessel, and then control the balance piston with an appropriate pressure difference to maintain an appropriate opening degree of the pressure relief port, thereby ensuring the smoothness of the pressure relief rate and avoiding large fluctuations in the pressure relief speed. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic structural diagram of a dynamic proportional pressure relief device for a pressure vessel;
[0019] Figure 2 is a schematic diagram of the pressure relief port being blocked by the balance piston;
[0020] Figure 3 is a schematic diagram of the balance piston opening the pressure relief port;
[0021] Figure 4 is a schematic diagram of the distribution of the diversion holes of the diversion plate.
[0022] Wherein: 1 - pressure vessel; 2 - pressure relief valve group; 3 - variable displacement pump; 4 - balance cavity; 5 - balance piston; 6 - elastic diversion member; 7 - liquid supply station; 21 - first pressure relief valve; 22 - second pressure relief valve; 23 - third pressure relief valve; 61 - spring; 62 - diversion plate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] The following detailed descriptions are all illustrative and are intended to provide further explanations of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.
[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the present utility model clearly states otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0025] For the convenience of description, in the present utility model, if the words "upper", "lower", "left", or "right" appear, they only indicate the same directions as the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0026] Term explanation part: Terms such as "installation", "connection", "connection", and "fixation" in the present utility model should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be an internal connection between two components, or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0027] Embodiment 1:
[0028] A dynamic proportional pressure relief device for a pressure vessel in this embodiment, as Figures 1-3 shown, includes a pressure vessel 1 and a pressure controller. The pressure vessel 1 includes a pressure relief end and a pressure replenishment end. The pressure relief end is connected with a pressure relief valve group 2, and the pressure replenishment end is connected with a dynamic variable pump 3. Inside the pressure vessel 1, a balance chamber 4 is arranged between the pressure relief end and the pressure replenishment end. Inside the balance chamber 4, a balance piston 5 is arranged. One end of the balance piston 5 is communicated with the inside of the pressure vessel 1, and the other end of the balance piston 5 is communicated with the pressure replenishment end; on the side wall of the balance chamber 4, there is a pressure relief port connected with the pressure relief end. The balance piston 5 opens or blocks the pressure relief port through its own movement. The pressure controller is connected with the pressure relief valve group 2 and the dynamic variable pump 3.
[0029] The pressure controller is connected with the pressure relief valve group 2 and the dynamic variable pump 3. The opening and closing of the pressure relief valve group 2 and the second pressure output by the dynamic variable pump 3 to the pressure replenishment end are controlled through the pressure controller. One end of the balance chamber 4 is communicated with the inside of the pressure vessel 1, and the first pressure inside the pressure vessel 1 acts on one end of the balance piston 5. The other end of the balance chamber 4 is communicated with the pressure replenishment end, and the second pressure provided by the dynamic variable pump 3 acts on the other end of the balance piston 5. A strip-shaped pressure relief port is arranged on the chamber wall of the balance chamber 4. When the balance piston 5 is in the initial position, the pressure relief port is completely blocked to ensure that the fluid inside the pressure vessel 1 does not leak. The pressure relief port is connected with the pressure relief valve group 2 as the pressure relief end.
[0030] In the initial state, the first pressure and the second pressure at both ends of the balance piston 5 are equal, so that the balance piston 5 remains balanced and completely blocks the pressure relief port. When it is necessary to relieve the pressure of the pressure vessel 1, the pressure controller controls the second pressure output by the dynamic variable pump 3 to decrease. At this time, the first pressure is greater than the second pressure to break the balance state of the balance piston 5, so that the balance piston 5 moves and opens the pressure relief port. At the same time, the pressure controller controls the pressure relief valve group 2 to open. At this time, the fluid inside the pressure vessel 1 can be discharged through the pressure relief port and the pressure relief valve group 2, realizing the pressure relief of the pressure vessel 1.
[0031] During the pressure relief process, the first pressure acting on one end of the balance piston 5 by the pressure vessel and the second pressure provided by the dynamic variable pump 3 are monitored in real time. According to the change of the first pressure inside the pressure vessel 1, the second pressure provided by the dynamic variable pump 3 is dynamically adjusted in real time through the pressure controller, and then the opening degree of the pressure relief port by the balance piston 5 is adjusted, and finally the dynamic adjustment of the pressure relief rate is realized. Specifically:
[0032] When the second pressure decreases, the opening degree of the pressure relief port increases, so that the pressure relief rate increases; when the second pressure increases, the opening degree of the pressure relief port decreases, so that the pressure relief rate decreases.
[0033] Embodiment 2:
[0034] A dynamic proportional pressure relief device for a pressure vessel is improved on the basis of Embodiment 1. A first pressure sensor is arranged inside the pressure vessel 1, and a second pressure sensor is arranged at the pressure replenishing end. The first pressure sensor and the second pressure sensor are both connected to the pressure controller.
[0035] The first pressure inside the pressure vessel 1 is monitored in real time through the first pressure sensor, and the second pressure provided by the dynamic variable pump 3 is monitored in real time through the second pressure sensor. The monitored first pressure and second pressure are sent to the pressure controller. The pressure controller calculates the opening degree of the pressure relief port by the balance piston 5 according to the difference between the first pressure and the second pressure, and then dynamically adjusts the second pressure provided by the dynamic variable pump 3 to ensure the stable pressure relief of the pressure vessel 1.
[0036] Other parts of this embodiment are the same as those of Embodiment 1, so they will not be described in detail.
[0037] Embodiment 3:
[0038] A dynamic proportional pressure relief device for a pressure vessel is improved on the basis of Embodiment 1 or 2. As Figures 2-4 shown, an elastic flow guiding member 6 is arranged corresponding to the pressure replenishing end inside the balance cavity 4, and a plurality of flow guiding holes are arranged on the elastic flow guiding member 6.
[0039] By setting the elastic flow guide member 6 to elastically guide the fluid provided by the dynamic variable pump 3, it is ensured that the fluid provided by the dynamic variable pump 3 can act more uniformly on the end of the balance piston 5, avoiding uneven distribution of the second pressure at the end of the balance piston 5.
[0040] Further, the elastic flow guide member 6 includes a spring 61 and a flow guide disc 62. The flow guide disc 62 is slidably disposed inside the balance chamber 4. One side of the flow guide disc 62 close to the pressure replenishing end is connected to the inner wall of the balance chamber 4 through the spring 61, and a plurality of flow guide holes are circumferentially arranged on the flow guide disc 62.
[0041] The fluid provided by the dynamic variable pump 3 acts on the side of the flow guide disc 62 away from the balance piston 5, forcing the spring 61 to stretch. The fluid is buffered by the stretching of the spring 61 to avoid damage to the balance piston 5 caused by a sudden increase in pressure at the initial start of the dynamic variable pump 3. Then, the fluid is uniformly guided to the end of the balance piston 5 through the circumferentially evenly distributed flow guide holes on the flow guide disc 62, so that the fluid acts relatively uniformly on the end of the balance piston 5, avoiding the occurrence of jamming of the balance piston 5 due to uneven pressure distribution.
[0042] Further, the flow guide hole is a tapered hole. The small-diameter end of the tapered hole is arranged corresponding to the pressure replenishing end, and the large-diameter end of the tapered hole is arranged corresponding to one end of the balance piston 5.
[0043] Other parts of this embodiment are the same as those of Embodiment 1 or 2, so they will not be elaborated here.
[0044] Embodiment 4:
[0045] A dynamic proportional pressure relief device for a pressure vessel, which is improved on the basis of any one of Embodiments 1-3. As Figure 1 shown, the pressure relief valve group 2 includes a first pressure relief valve 21, a second pressure relief valve 22, and a third pressure relief valve 23. The first pressure relief valve 21, the second pressure relief valve 22, and the third pressure relief valve 23 are connected in parallel to the pressure relief end in sequence.
[0046] The pressure controller controls the first pressure relief valve 21, the second pressure relief valve 22, and the third pressure relief valve 23 to open in sequence according to the pressure inside the pressure vessel 1. Specifically:
[0047] When the pressure inside the pressure vessel 1 is greater than or equal to 200 Mpa, the pressure controller controls the first pressure relief valve 21, the second pressure relief valve 22, and the third pressure relief valve 23 to open simultaneously, and the pressure vessel 1 is depressurized through the first pressure relief valve 21, the second pressure relief valve 22, and the third pressure relief valve 23. The three branches where the first pressure relief valve 21, the second pressure relief valve 22, and the third pressure relief valve 23 are located can divert the fluid, avoiding excessive pressure inside a single pipeline.
[0048] When the internal pressure of the pressure vessel 1 is between 100 Mpa and 200 Mpa, the pressure controller controls the first pressure relief valve 21 and the second pressure relief valve 22 to open, controls the third pressure relief valve 23 to close, and at the same time relieves the pressure of the pressure vessel 1 through the first pressure relief valve 21 and the second pressure relief valve 22.
[0049] When the internal pressure of the pressure vessel 1 is less than or equal to 100 Mpa, the pressure controller controls the first pressure relief valve 21 to open, controls the second pressure relief valve 22 and the third pressure relief valve 23 to close, and relieves the pressure of the pressure vessel 1 through the first pressure relief valve 21.
[0050] Further, it further includes a liquid supply station 7. The outlet end of the pressure relief valve group 2 is connected to the liquid supply station 7, and the inlet end of the variable displacement pump 3 is connected to the liquid supply station 7. The fluid flowing out during pressure relief flows through the outlet end of the pressure relief valve group 2 to the liquid supply station 7 for storage. At the same time, the inlet end of the variable displacement pump 3 sucks the fluid through the liquid supply station 7 and transports it to the pressure replenishment end, thereby realizing the circulation function of the fluid.
[0051] Other parts of this embodiment are the same as any one of Embodiments 1-3, so they will not be described in detail.
[0052] The above is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Any simple modification and equivalent change made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.
Claims
1. A dynamic proportional pressure relief device for a pressure vessel, comprising a pressure vessel (1) and a pressure controller, characterized in that: The pressure vessel (1) comprises a pressure relief end and a pressure replenishing end, the pressure relief end is connected to a pressure relief valve group (2), the pressure replenishing end is connected to a dynamic variable pump (3), a balancing chamber (4) is arranged inside the pressure vessel (1) between the pressure relief end and the pressure replenishing end, a balancing piston (5) is arranged inside the balancing chamber (4), one end of the balancing piston (5) is connected to the inside of the pressure vessel (1), and the other end of the balancing piston (5) is connected to the pressure replenishing end; a pressure relief port connected to the pressure relief end is arranged on the side wall of the balancing chamber (4), the balancing piston (5) opens or blocks the pressure relief port by moving itself, and the pressure controller is connected to the pressure relief valve group (2) and the dynamic variable pump (3).
2. A dynamic proportional pressure relief device for a pressure vessel according to claim 1, characterized in that: A first pressure sensor is arranged inside the pressure container (1), and a second pressure sensor is arranged at the pressure compensation end; the first pressure sensor and the second pressure sensor are both connected to a pressure controller.
3. A dynamic proportional pressure relief device for a pressure vessel according to claim 2, characterized in that: An elastic flow guide (6) is provided inside the balancing chamber (4) corresponding to the pressure-compensating end, and a plurality of flow guide holes are provided on the elastic flow guide (6).
4. A dynamic proportional pressure relief device for a pressure vessel according to claim 3, characterized in that: The elastic flow guide member (6) comprises a spring (61) and a flow guide plate (62). The flow guide plate (62) is slidably arranged inside the balancing chamber (4). A side of the flow guide plate (62) close to the pressure compensation end is connected to the inner wall of the balancing chamber (4) via the spring (61). A plurality of flow guide holes are circumferentially arranged on the surface of the flow guide plate (62).
5. A dynamic proportional pressure relief device for a pressure vessel according to claim 4, characterized in that: The guide hole is a tapered hole, the small diameter end of the tapered hole is arranged corresponding to the pressure compensation end, and the large diameter end of the tapered hole is arranged corresponding to one end of the balancing piston (5).
6. A dynamic proportional pressure relief device for a pressure vessel according to any one of claims 1 to 5, characterized in that: The pressure relief valve group (2) comprises a first pressure relief valve (21), a second pressure relief valve (22), and a third pressure relief valve (23); the first pressure relief valve (21), the second pressure relief valve (22), and the third pressure relief valve (23) are sequentially connected in parallel to the pressure relief end.
7. A dynamic proportional pressure relief device for a pressure vessel according to claim 6, characterized in that: It also comprises a liquid supply station (7), the outlet end of the pressure relief valve group (2) is connected to the liquid supply station (7), and the inlet end of the dynamic variable pump (3) is connected to the liquid supply station (7).