Pre-protection device for pressure vessel

Abstract

The pre-protection device for the pressure container comprises a protection pipe, a first baffle, a second baffle and an elastic piece, the protection pipe is provided with a liquid inlet and a liquid outlet opposite to the liquid inlet, and the pipe diameter of the protection pipe is larger than that of a liquid outlet pipe of a pressure source; the first baffle is arranged in the protection pipe and hinged to the protection pipe, the first baffle is provided with a first pressure sensing section used for sensing the fluctuation load, and when the liquid outlet pipe of the pressure source has the fluctuation load larger than a set value, the first baffle rotates in the direction of closing the protection pipe under the action of the first pressure sensing section; the second baffle is arranged in the protection pipe and hinged to the protection pipe, and the second baffle can rotate in the direction of closing the protection pipe along with the first baffle; the elastic piece is arranged in the protection pipe and acts on the first baffle and the second baffle, and when the first baffle and the second baffle rotate in the direction of closing the protection pipe, the elastic piece deforms and exerts opposite acting force on the first baffle and the second baffle.

Description

Technical Field

[0001] This application belongs to the technical field of container protection, and particularly relates to a pre-protection device for a pressure vessel. Background Art

[0002] When a pressure vessel device is operating, it is inevitable to be affected by the fluctuating load of an external pressure source. The fluctuating load will bring an impact force to the pressure vessel, and then cause an impact hazard to the internal structure of the pressure vessel. At the same time, the fluctuating load will also cause the internal pressure of the device to exceed the safe pressure that the pressure vessel can withstand, bringing a risk of overpressure explosion to the pressure vessel.

[0003] In order to reduce the harm caused by the impact on the internal structure of the pressure vessel and reduce the risk of explosion of the pressure vessel, there are currently two common measures. One is to add a fixed baffle inside the pressure vessel, and then the fixed baffle blocks the fluctuating load. However, it cannot self-adjust according to the size of the fluctuating load, so there is a defect of poor mitigation effect. And the fixed baffle is installed inside the pressure vessel, which can only slow down the impact force of the fluctuating load on the internal structure of the pressure vessel, but it cannot eliminate the risk of pressure increase caused by the fluctuating load. The other is to install a safety valve on the pressure vessel to prevent the pressure vessel from overpressurizing. However, the operation of the safety valve has a lag, that is, the fluctuating load will first enter the inside of the pressure vessel, and the safety valve will only work after the internal pressure of the pressure vessel increases. In this way, there is still a risk of explosion of the pressure vessel due to overpressure. Utility Model Content

[0004] This application provides a pre-protection device for a pressure vessel to reduce the impact force of the fluctuating load on the internal structure of the pressure vessel and reduce the risk of overpressure explosion of the pressure vessel caused by the fluctuating load.

[0005] The technical solution adopted by this application is as follows:

[0006] A pre-protection device for a pressure vessel, comprising:

[0007] A protection pipe, which has a liquid inlet and a liquid outlet opposite to the liquid inlet. The liquid inlet is communicated with the liquid outlet pipe of the pressure source, the liquid outlet is communicated with the liquid inlet pipe of the pressure vessel, and the diameter of the protection pipe is larger than the diameter of the liquid outlet pipe of the pressure source;

[0008] A first baffle, which is arranged inside the protection pipe and hinged to the protection pipe. The first baffle has a first pressure-sensing section for sensing the fluctuating load. When the liquid outlet pipe of the pressure source has a fluctuating load greater than a set value, the first baffle rotates in the direction of closing the protection pipe under the action of the first pressure-sensing section;

[0009] A second baffle plate, which is arranged inside the protection tube and hinged to the protection tube, and the second baffle plate can rotate in the direction of closing the protection tube following the first baffle plate;

[0010] An elastic member, which is arranged inside the protection tube and acts on the first baffle plate and the second baffle plate. When the first baffle plate and the second baffle plate rotate in the direction of closing the protection tube, the elastic member deforms and exerts a reverse acting force on the first baffle plate and the second baffle plate.

[0011] By adopting the above technical solution, when the fluctuating load in the pressure source enters the protection tube through the liquid inlet and the fluctuating load is greater than the set value, the first pressure-sensing section drives the first baffle plate to rotate, and then the first baffle plate rotates in the direction of closing the protection tube. At this time, the second baffle plate also rotates in the direction of closing the protection tube under the action of the first baffle plate, so as to reduce the flow-through area of the protection tube, so that the first baffle plate and the second baffle plate block the fluctuating load, so as to greatly reduce the impact force of the fluctuating load on the internal container of the pressure vessel, and further avoid the possible damage of the internal structure of the pressure vessel. At the same time, the situation that the fluctuating load may cause the overpressure explosion of the pressure vessel is avoided, so as to extend the service life of the pressure vessel.

[0012] When the first baffle plate and the second baffle plate rotate in the direction of closing the protection tube, the first baffle plate and the second baffle plate exert a force on the elastic member, so that the elastic member deforms and exerts a reverse acting force on the first baffle plate and the second baffle plate. Thus, after the fluctuating load is less than the set value, the elastic member recovers its deformation, so that the first baffle plate and the second baffle plate return to their original positions.

[0013] In addition, the diameter of the protection tube in the present application is larger than the diameter of the liquid outlet pipe of the pressure source. On the one hand, it can play a role in reducing the pressure of the fluctuating load, so as to also reduce the impact force of the fluctuating load on the internal structure of the pressure vessel, and further greatly extend the service life of the pressure vessel. On the other hand, it can make more liquid flow to the first pressure-sensing section, so as to greatly improve the response efficiency of the first pressure-sensing section, and further improve the protection effect on the pressure vessel.

[0014] Optionally, the first pressure-sensing section is located on a side of the first baffle plate's rotation axis close to the liquid inlet, the first baffle plate also has a first following section located on a side of its own rotation axis away from the liquid inlet, the second baffle plate has a second pressure-sensing section located on a side of its own rotation axis close to the liquid inlet and a second following section located on a side of its own rotation axis away from the liquid inlet, the sum of the lengths of the first pressure-sensing section and the second pressure-sensing section is greater than the distance between the first baffle plate's rotation axis and the second baffle plate's rotation axis, and the first pressure-sensing section can act on the second pressure-sensing section so that when the first baffle plate rotates in a direction to close the protective tube, the second baffle plate can rotate in a direction to close the protective tube under the action of the second pressure-sensing section.

[0015] By adopting the above technical solution, after a fluctuating load greater than a set value enters the protective tube, the fluctuating load acts on the first pressure-sensing section, and then the first pressure-sensing section overcomes the elastic force of the elastic member under the action of the fluctuating load and moves in a direction away from the liquid inlet. The first follower section moves in a direction to close the protective tube under the action of the first pressure-sensing section. At the same time, the first pressure-sensing section acts on the second pressure-sensing section to make the second pressure-sensing section move in a direction away from the liquid inlet. The second follower section moves in a direction to close the protective tube under the action of the second pressure-sensing section, thereby reducing the flow area of ​​the protective tube to block the fluctuating load and protect the pressure vessel.

[0016] Optionally, the length of the first pressure-sensing section is greater than the length of the second pressure-sensing section.

[0017] By adopting the above technical solution, since the length of the first pressure-sensing section is greater than that of the second pressure-sensing section, the area of ​​the first baffle plate that bears the fluctuating load is increased, so as to greatly improve the force that the fluctuating load can apply to the first pressure-sensing section, thereby greatly improving the response efficiency of the first baffle plate, and further greatly improving the protection effect on the pressure vessel.

[0018] Optionally, the first baffle is provided with a first gear coaxially arranged with its own rotation axis, and the second baffle is provided with a second gear coaxially arranged with its own rotation axis, and the first gear and the second gear are meshingly connected with each other.

[0019] By adopting the above technical solution, after the fluctuating load greater than the set value enters the protection tube, the fluctuating load acts on the first pressure-sensing section, and then causes the first pressure-sensing section to move in a direction away from the liquid inlet against the elastic force of the elastic member under the action of the fluctuating load. The first follower section moves in a direction to close the protection tube under the action of the first pressure-sensing section. At the same time, the first baffle drives the first gear to rotate, and the second gear drives the second baffle to move, so that the second baffle also moves in a direction to close the protection tube, thereby reducing the flow area of the protection tube to block the fluctuating load and playing a role in protecting the pressure vessel.

[0020] Optionally, the first baffle further has a first follower section, the second baffle has a second follower section located on the side of its rotation axis away from the liquid inlet, the elastic member is in an arc-shaped plate structure, and both ends of the elastic member are respectively connected to the first follower section and the second follower section.

[0021] By adopting the above technical solution, when the first follower section and the second follower section rotate in a direction to close the protection tube, the elastic member deforms under the action of the first follower section and the second follower section, and then the elastic member changes towards a gradually straight state. After the fluctuating load is less than the set value, the elastic member recovers its deformation, so that the first follower section and the second follower section gradually return to their original positions. By setting the elastic member as an arc-shaped plate structure, the elastic effect of the elastic member on the first baffle and the second baffle can be increased, and at the same time, the service life of the elastic member can be ensured, so as to extend the service life of the pre-protection device.

[0022] Optionally, a plurality of connecting grooves are arranged at intervals along the length direction of the first follower section and the second follower section, and both ends of the elastic member are hinged with connecting blocks that are snap-fitted with one of the connecting grooves.

[0023] By adopting the above technical solution, since a plurality of connecting grooves are arranged at intervals along the length directions of the first baffle and the second baffle, it is possible to adjust the elasticity of the elastic member by snap-fitting the connecting blocks into different connecting grooves, thereby adjusting the impact force required for the first baffle and the second baffle to rotate towards the pressure-regulating position, that is, realizing the blocking and pressure reduction of different fluctuating loads, and further increasing the flexibility of the pre-protection device. And, as the use time of the pre-protection device increases, the elastic effect of the elastic member will become worse. At this time, the elastic force of the elastic member can also be adjusted by snap-fitting the connecting blocks into different connecting grooves, so as to ensure that the first baffle and the second baffle can respond only when the fluctuating load is greater than the set pressure, thereby ensuring the efficiency of liquid entering the pressure vessel, and at the same time increasing the service life of the elastic member and the service life of the pre-protection device, so as to reduce the use cost of the pre-protection device.

[0024] Optionally, the elastic member is a tension spring, and two ends of the tension spring are respectively connected to one ends of the first baffle and the second baffle close to the liquid outlet.

[0025] By adopting the above technical solution, since two ends of the tension spring are respectively connected to one ends of the first baffle and the second baffle close to the liquid outlet, when the first baffle and the second baffle rotate towards the direction of closing the protection tube, both the first baffle and the second baffle apply a pulling force to the tension spring, so that the tension spring deforms and applies a reverse acting force to the first baffle and the second baffle. After the fluctuating load is less than the set value, the tension spring gradually recovers its deformation, and further makes the first baffle and the second baffle rotate to the initial position. By setting the elastic member as the tension spring, on the one hand, the production cost of the pre-protection device can be reduced, and on the other hand, the effect of facilitating the replacement of the elastic member can be achieved.

[0026] Optionally, the diameter of the liquid outlet pipe of the pressure source is smaller than the diameter of the liquid inlet pipe of the pressure vessel, and both are coaxially arranged with the protection tube.

[0027] By adopting the above technical solution, since the diameter of the liquid outlet pipe of the pressure source is smaller than the diameter of the liquid inlet pipe of the pressure vessel and both are coaxially arranged with the protection tube, on the one hand, the acting force exerted by the fluctuating load on the first pressure sensing section can be increased to further improve the response efficiency of the first sensing section, and on the other hand, the diameter ratio of the liquid outlet pipe of the pressure source to the protection tube can be further increased to further improve the pressure reduction effect of the protection tube on the fluctuating load.

[0028] Optionally, the diameter of the liquid outlet pipe of the pressure source is equal to the diameter of the liquid inlet pipe of the pressure vessel, a flow guide pipe located upstream of the first baffle and the second baffle is arranged in the protection tube, and the diameter of the flow guide pipe gradually increases along the direction away from the first baffle and the second baffle.

[0029] By adopting the above technical solution, after the liquid enters the protection tube, it enters the flow guide pipe, and then the liquid flows towards the first pressure sensing section under the action of the flow guide pipe. Since the diameter of the flow guide pipe gradually increases along the direction away from the first baffle and the second baffle, more liquid flows towards the first pressure sensing section, so as to greatly improve the response efficiency of the first pressure sensing section. At the same time, the impact force that the fluctuating load can exert on the first pressure sensing section is increased to ensure that when the fluctuating load is greater than the set value, the first baffle and the second baffle can rotate towards the direction of closing the protection tube to ensure the protection effect on the pressure vessel.

[0030] Optionally, the rotation axes of the first baffle and the second baffle are both located on a flow-through surface perpendicular to the axial direction of the protection tube;

[0031] And / or, the first baffle further includes a pressure boosting section provided at the end of the pressure sensing section. The pressure boosting section is arranged at an angle with the first pressure sensing section and is located on the side of the first pressure sensing section close to the second baffle.

[0032] By adopting the above technical solution, since the rotation axes of both the first baffle and the second baffle are located on the flow-through surface perpendicular to the axial direction of the protection pipe, when the first baffle and the second baffle are in the limit positions in the direction of closing the protection pipe, there are angles between the elastic member and both the first baffle and the second baffle, so that the elastic member can recover its deformation, and further ensure that the elastic member can drive the first baffle and the second baffle to the initial positions.

[0033] Since the pressure boosting section is arranged at an angle with the first pressure sensing section and is located on the side of the first pressure sensing section close to the second baffle, it further increases the area on which the fluctuating load can act on the first baffle, so as to further increase the impact force exerted by the fluctuating load on the first baffle, and further improve the response efficiency of the first baffle, thereby greatly improving the protection effect on the pressure vessel.

[0034] Due to the adoption of the above technical solution, the beneficial effects obtained by this application are as follows:

[0035] 1. The pre-protection device in this application includes a protection pipe, a first baffle, a second baffle and an elastic member. The protection pipe has a liquid inlet and a liquid outlet opposite to the liquid inlet, and the diameter of the protection pipe is larger than the diameter of the liquid outlet pipe of the pressure source; the first baffle is arranged inside the protection pipe and is hinged to the protection pipe. The first baffle has a first pressure sensing section for sensing the fluctuating load. When the liquid outlet pipe of the pressure source has a fluctuating load greater than the set value, the first baffle rotates in the direction of closing the protection pipe under the action of the first pressure sensing section; the second baffle is arranged inside the protection pipe and is hinged to the protection pipe. The second baffle can follow the first baffle and rotate in the direction of closing the protection pipe; the elastic member is arranged inside the protection pipe and acts on the first baffle and the second baffle. When the first baffle and the second baffle rotate in the direction of closing the protection pipe, the elastic member deforms and exerts a reverse acting force on the first baffle and the second baffle. When the fluctuating load in the pressure source enters the protection pipe through the liquid inlet and the fluctuating load is greater than the set value, the first pressure sensing section drives the first baffle to rotate, and then the first baffle rotates in the direction of closing the protection pipe. At this time, the second baffle also rotates in the direction of closing the protection pipe under the action of the first baffle, so as to reduce the flow-through area of the protection pipe, so that the first baffle and the second baffle block the fluctuating load, so as to greatly reduce the impact force of the fluctuating load on the inner container of the pressure vessel, and further avoid the possible damage of the internal structure of the pressure vessel. At the same time, it avoids the occurrence of the situation that the fluctuating load may cause the overpressure explosion of the pressure vessel, so as to extend the service life of the pressure vessel.

[0036] 2. In this application, the first pressure-sensitive section is located on the side of the rotation axis of the first baffle plate closer to the liquid inlet. The first baffle plate also has a first follower section on the side of its rotation axis away from the liquid inlet. The second baffle plate has a second pressure-sensitive section on the side of its rotation axis closer to the liquid inlet and a second follower section on the side of its rotation axis away from the liquid inlet. The sum of the lengths of the first pressure-sensitive section and the second pressure-sensitive section is greater than the distance between the rotation axis of the first baffle plate and the rotation axis of the second baffle plate, and the first pressure-sensitive section can act on the second pressure-sensitive section so that when the first baffle plate rotates towards the direction of closing the protection tube, the second baffle plate can rotate towards the direction of closing the protection tube under the action of the second pressure-sensitive section. After a fluctuating load greater than the set value enters the protection tube, the fluctuating load acts on the first pressure-sensitive section, and then the first pressure-sensitive section moves towards the direction away from the liquid inlet under the action of the fluctuating load, overcoming the elastic force of the elastic member. The first follower section moves towards the direction of closing the protection tube under the action of the first pressure-sensitive section. At the same time, the first pressure-sensitive section acts on the second pressure-sensitive section so that the second pressure-sensitive section moves towards the direction away from the liquid inlet, and the second follower section moves towards the direction of closing the protection tube under the action of the second pressure-sensitive section, thereby reducing the flow area of the protection tube to block the fluctuating load and playing a role in protecting the pressure vessel.

[0037] 3. The length of the first pressure-sensitive section of the pre-protection device in this application is greater than the length of the second pressure-sensitive section, thereby increasing the area of the first baffle plate that bears the fluctuating load, greatly improving the force that the fluctuating load can exert on the first pressure-sensitive section, thus greatly improving the response efficiency of the first baffle plate, and further greatly improving the protection effect on the pressure vessel. Description of the Drawings

[0038] The drawings described herein are used to provide a further understanding of this application and form a part of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0039] Figure 1 It is a schematic structural diagram of the pre-protection device described in the first embodiment of this application. The direction indicated by the solid arrow in the figure is the direction in which the first baffle plate rotates towards closing the protection tube, and the direction indicated by the dashed arrow is the direction in which the second baffle plate rotates towards closing the protection tube;

[0040] Figure 2 It is a schematic structural diagram of the pre-protection device described in the second embodiment of this application;

[0041] Figure 3 It is a schematic connection structure diagram of the first baffle plate and the second baffle plate and the elastic member described in the third embodiment of this application;

[0042] Figure 4This is a schematic structural diagram of the pre - protection device described in the fourth embodiment of the present application, mainly showing the diversion pipe;

[0043] Figure 5 This is a schematic structural diagram of the pre - protection device described in the fifth embodiment of the present application, mainly showing the pressurization section.

[0044] Reference numerals:

[0045] 1. Protection pipe; 11. Diversion pipe; 12. Flange; 2. First baffle; 21. First pressure - sensing section; 211. First gear; 22. First follower section; 221. Connection groove; 23. Pressurization section; 3. Second baffle; 31. Second pressure - sensing section; 311. Second gear; 32. Second follower section; 4. Elastic member; 41. Connection block; 5. Liquid inlet pipe; 6. Liquid outlet pipe. Detailed implementation manners

[0046] In order to more clearly illustrate the overall concept of the present application, the following will be described in detail by way of examples in conjunction with the accompanying drawings of the specification.

[0047] In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that, without conflict, the embodiments of the present application and the features in each embodiment may be combined with each other.

[0048] In addition, in the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0049] In the present application, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application may be understood according to specific circumstances.

[0050] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do 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.

[0051] Referring to Figures 1 to 5 , a pre-protection device for a pressure vessel is disclosed, which includes a protection tube 1, a first baffle 2, a second baffle 3, and an elastic member 4. The protection tube 1 has a liquid inlet and a liquid outlet opposite to the liquid inlet. The liquid inlet is communicated with the liquid outlet pipe 6 of the pressure source, and the liquid outlet is communicated with the liquid inlet pipe 5 of the pressure vessel. The diameter of the protection tube 1 is larger than the diameter of the liquid outlet pipe 6 of the pressure source; the first baffle 2 is arranged inside the protection tube 1 and hinged to the protection tube 1. The first baffle 2 has a first pressure-sensing section 21 for sensing the fluctuating load. When the liquid outlet pipe 6 of the pressure source has a fluctuating load greater than the set value, the first baffle 2 rotates in the direction of closing the protection tube 1 under the action of the first pressure-sensing section 21; the second baffle 3 is arranged inside the protection tube 1 and hinged to the protection tube 1. The second baffle 3 can follow the first baffle 2 and rotate in the direction of closing the protection tube 1; the elastic member 4 is arranged inside the protection tube 1 and acts on the first baffle 2 and the second baffle 3. When the first baffle 2 and the second baffle 3 rotate in the direction of closing the protection tube 1, the elastic member 4 deforms and exerts a reverse acting force on the first baffle 2 and the second baffle 3.

[0052] It should be noted that the statement "the first baffle 2 has a first pressure-sensing section 21 for sensing the fluctuating load" means that the liquid flowing into the protection tube 1 through the liquid inlet can flow to the first pressure-sensing section 21 and exert an impact force on the first pressure-sensing section 21. And when the fluctuating load of the pressure source enters the protection tube 1 and is greater than the set value, the impact force exerted on the first pressure-sensing section 21 by the fluctuating load greater than the set value is greater than the force exerted on the first baffle 2 by the elastic member 4, so that the first sensing section can drive the first baffle 2 to rotate, and finally the first baffle 2 rotates in the direction of closing the protection tube 1.

[0053] Referring to Figure 1, the direction in which the first baffle 2 faces to close the protection tube 1 and the direction in which the second baffle 3 closes the protection tube 1 are opposite to each other, and to close the protection tube 1, it can be that the first baffle 2 and the second baffle 3 are adapted to the shape of the protection tube 1 so as to be able to completely close the protection tube 1, or it can also be to adjust the flow area of the protection tube 1 to reduce the flow area of the protection tube 1.

[0054] Specifically, when the fluctuating load in the pressure source enters the protection tube 1 through the liquid inlet and the fluctuating load is greater than the set value, the first pressure-sensing section 21 drives the first baffle 2 to rotate, and then the first baffle 2 rotates in the direction of closing the protection tube 1. At this time, the second baffle 3 also rotates in the direction of closing the protection tube 1 under the action of the first baffle 2 to reduce the flow area of the protection tube 1, so that the first baffle 2 and the second baffle 3 block the fluctuating load, greatly reducing the impact force of the fluctuating load on the inner container of the pressure vessel, thereby avoiding the possible damage to the internal structure of the pressure vessel, and at the same time avoiding the situation that the fluctuating load may cause the overpressure explosion of the pressure vessel, so as to extend the service life of the pressure vessel.

[0055] When the first baffle 2 and the second baffle 3 rotate in the direction of closing the protection tube 1, the first baffle 2 and the second baffle 3 apply forces to the elastic member 4, causing the elastic member 4 to deform and apply a reverse acting force to the first baffle 2 and the second baffle 3. Thus, after the fluctuating load is less than the set value, the elastic member 4 resumes deformation, causing the first baffle 2 and the second baffle 3 to reset.

[0056] In addition, the diameter of the protection tube 1 in this application is larger than the diameter of the liquid outlet pipe 6 of the pressure source. On the one hand, it can play a role in reducing the pressure of the fluctuating load, also achieving the effect of reducing the impact of the fluctuating load on the internal structure of the pressure vessel, thereby greatly extending the service life of the pressure vessel. On the other hand, it can make more liquid flow to the first pressure-sensing section 21, greatly improving the response efficiency of the first pressure-sensing section 21, and thus improving the protection effect on the pressure vessel.

[0057] Moreover, the pre-protection device in this application can adjust the positions of the first baffle 2 and the second baffle 3 according to the magnitude of the fluctuating load, greatly reducing the impact of the fluctuating load on the internal structure of the pressure vessel, and at the same time increasing the flexibility and applicability of the pre-protection device.

[0058] This application does not make specific limitations on the shape of the protection tube 1. It can be a pipe with a circular cross-sectional shape, or it can also be a pipe with a square cross-sectional shape or other shapes.

[0059] This application does not make specific limitations on the way in which the second baffle 3 can follow the first baffle 2 to rotate in the direction of closing the protection tube 1. It can adopt any one of the following embodiments:

[0060] Embodiment 1, in this embodiment, refer to Figure 1 The first pressure-sensing section 21 is located on the side of the rotation axis of the first baffle 2 close to the liquid inlet. The first baffle 2 also has a first follower section 22 located on the side of its own rotation axis away from the liquid inlet. The second baffle 3 has a second pressure-sensing section 31 located on the side of its own rotation axis close to the liquid inlet and a second follower section 32 located on the side of its own rotation axis away from the liquid inlet. The sum of the lengths of the first pressure-sensing section 21 and the second pressure-sensing section 31 is greater than the distance between the rotation axis of the first baffle 2 and the rotation axis of the second baffle 3, and the first pressure-sensing section 21 can act on the second pressure-sensing section 31, so that when the first baffle 2 rotates in the direction of closing the protective tube 1, the second baffle 3 can rotate in the direction of closing the protective tube 1 under the action of the second pressure-sensing section 31.

[0061] Specifically, after a fluctuating load greater than a set value enters the protection tube 1, the fluctuating load acts on the first pressure-sensing segment 21, and then the first pressure-sensing segment 21 overcomes the elastic force of the elastic member 4 under the action of the fluctuating load and moves in a direction away from the liquid inlet. The first follower segment 22 moves in a direction to close the protection tube 1 under the action of the first pressure-sensing segment 21. At the same time, the first pressure-sensing segment 21 acts on the second pressure-sensing segment 31 to cause the second pressure-sensing segment 31 to move in a direction away from the liquid inlet. The second follower segment 32 moves in a direction to close the protection tube 1 under the action of the second pressure-sensing segment 31, thereby reducing the flow area of ​​the protection tube 1 to block the fluctuating load and protect the pressure vessel.

[0062] Furthermore, the length of the first pressure-sensing section 21 is greater than the length of the second pressure-sensing section 31, thereby increasing the area of ​​the first baffle 2 that bears the fluctuating load, so as to greatly increase the force that the fluctuating load can apply to the first pressure-sensing section 21, thereby greatly improving the response efficiency of the first baffle 2, and further greatly improving the protection effect on the pressure vessel.

[0063] Better, refer to Figure 1 The first pressure-sensing section 21 and the first follower section 22 are coplanarly arranged, and the second pressure-sensing section 31 and the second follower section 32 are coplanarly arranged, so as to reduce the production difficulty of the first baffle 2 and the second baffle 3, so as to reduce the production difficulty of the pre-protection device, and thereby reduce the production cost of the pre-protection device.

[0064] Embodiment 2, in this embodiment, referring to Figure 2 The first baffle plate 2 is provided with a first gear 211 coaxially arranged with its own rotation axis, and the second baffle plate 3 is provided with a second gear 311 coaxially arranged with its own rotation axis. The first gear 211 and the second gear 311 are meshed and transmission-connected.

[0065] Specifically, after the fluctuating load greater than the set value enters the protection tube 1, the fluctuating load acts on the first pressure-sensing section 21, and then causes the first pressure-sensing section 21 to move in the direction away from the liquid inlet under the action of the fluctuating load, overcoming the elastic force of the elastic member 4. The first follower section 22 moves in the direction of closing the protection tube 1 under the action of the first pressure-sensing section 21. At the same time, the first baffle 2 drives the first gear 211 to rotate, and the second gear 311 drives the second baffle 3 to move, so that the second baffle 3 also moves in the direction of closing the protection tube 1, thereby reducing the flow area of the protection tube 1 to block the fluctuating load and play a role in protecting the pressure vessel.

[0066] The present application does not specifically limit the structure of the elastic member 4, and any one of the following embodiments can be adopted:

[0067] In some embodiments, referring to Figures 1 to 5 , the first baffle 2 further has a first follower section 22, and the second baffle 3 has a second follower section 32 located on the side of its rotation axis away from the liquid inlet. The elastic member 4 is in an arc-shaped plate structure, and both ends of the elastic member 4 are respectively connected to the first follower section 22 and the second follower section 32.

[0068] Specifically, when the first follower section 22 and the second follower section 32 rotate in the direction of closing the protection tube 1, the elastic member 4 deforms under the action of the first follower section 22 and the second follower section 32, and then the elastic member 4 changes towards a gradually straight state. After the fluctuating load is less than the set value, the elastic member 4 recovers its deformation, so that the first follower section 22 and the second follower section 32 gradually return to their original positions. By setting the elastic member 4 as an arc-shaped plate structure, the elastic effect of the elastic member 4 on the first baffle 2 and the second baffle 3 can be increased, and at the same time, the service life of the elastic member 4 can be guaranteed, so as to extend the service life of the pre-protection device.

[0069] Preferably, the elastic member 4 is a leaf spring to increase the elastic force that the elastic member 4 can exert on the first baffle 2 and the second baffle 3, so as to ensure the reset effect of the first baffle 2 and the second baffle 3.

[0070] Embodiment 3. In this embodiment, referring to Figure 3 , a plurality of connecting grooves 221 are arranged at intervals along the length direction of both the first follower section 22 and the second follower section 32, and both ends of the elastic member 4 are hinged with connecting blocks 41 that are snap-fitted with one of the connecting grooves 221.

[0071] Since a plurality of connecting grooves 221 are arranged at intervals along the length directions of the first baffle 2 and the second baffle 3, it is possible to adjust the elasticity of the elastic member 4 by clamping the connecting block 41 into different connecting grooves 221, so as to adjust the impact force required when the first baffle 2 and the second baffle 3 rotate towards the pressure regulating position, that is, to realize the blocking and pressure reduction of different fluctuating loads, thereby increasing the flexibility of the pre-protection device.

[0072] Moreover, as the use time of the pre-protection device increases continuously, the elastic effect of the elastic member 4 will become worse. At this time, the elastic force of the elastic member 4 can also be adjusted by clamping the connecting block 41 into different connecting grooves 221, so as to ensure that when the fluctuating load is greater than the set pressure, the first baffle 2 and the second baffle 3 can respond, thereby ensuring the efficiency of liquid entering the pressure vessel, and at the same time increasing the service life of the elastic member 4 and the service life of the pre-protection device, so as to reduce the use cost of the pre-protection device.

[0073] The present application does not specifically limit the structures of the connecting groove 221 and the connecting block 41. Preferably, referring to Figure 3 , the connecting groove 221 is a structure with a T-shaped cross-section, and the connecting block 41 is also a structure with a T-shaped cross-section to ensure the connection stability between the elastic member 4 and the first baffle 2 and the second baffle 3. In other embodiments, the connecting groove 221 can also be a structure with an L-shaped cross-section, and the shape of the connecting block 41 is adapted thereto.

[0074] In some other embodiments, the elastic member 4 is a tension spring. The two ends of the tension spring are respectively connected to one ends of the first baffle 2 and the second baffle 3 close to the liquid outlet. Then, when the first baffle 2 and the second baffle 3 rotate towards the direction of closing the protection pipe 1, the first baffle 2 and the second baffle 3 both apply a pulling force to the tension spring, so that the tension spring deforms and applies a reverse acting force to the first baffle 2 and the second baffle 3, so that after the fluctuating load is less than the set value, the tension spring gradually recovers its deformation, and then the first baffle 2 and the second baffle 3 rotate to the initial position. By setting the elastic member 4 as a tension spring, on the one hand, the production cost of the pre-protection device can be reduced, and on the other hand, the effect of facilitating the replacement of the elastic member 4 can be achieved.

[0075] Preferably, a plurality of hanging hooks are arranged at intervals along the length direction of one ends of the first baffle 2 and the second baffle 3 close to the liquid outlet, and the two ends of the tension spring are respectively hung on one of the corresponding hanging hooks, so as to be able to adjust the elastic force of the tension spring.

[0076] The present application does not specifically limit the relationship between the pipe diameter of the liquid outlet pipe 6 of the pressure source and the pipe diameter of the liquid inlet pipe 5 of the pressure vessel, and any one of the following embodiments can be adopted:

[0077] In some embodiments, referring to Figure 1, the diameter of the liquid outlet pipe 6 of the pressure source is smaller than that of the liquid inlet pipe 5 of the pressure vessel, and both are coaxially arranged with the protection pipe 1. On the one hand, it can increase the acting force exerted by the fluctuating load on the first pressure-sensing section 21 to further improve the response efficiency of the first sensing section. On the other hand, it can further increase the diameter ratio of the liquid outlet pipe 6 of the pressure source to the protection pipe 1 to further improve the pressure-reducing effect of the protection pipe 1 on the fluctuating load.

[0078] Embodiment 4. In this embodiment, refer to Figure 4 , the diameter of the liquid outlet pipe 6 of the pressure source is equal to that of the liquid inlet pipe 5 of the pressure vessel. A diversion pipe 11 is arranged in the protection pipe 1 upstream of the first baffle 2 and the second baffle 3, and the diameter of the diversion pipe 11 gradually increases in the direction away from the first baffle 2 and the second baffle 3.

[0079] After the liquid enters the protection pipe 1, it enters the diversion pipe 11, and then the liquid flows towards the first pressure-sensing section 21 under the action of the diversion pipe 11. Since the diameter of the diversion pipe 11 gradually increases in the direction away from the first baffle 2 and the second baffle 3, more liquid flows towards the first pressure-sensing section 21, so as to greatly improve the response efficiency of the first pressure-sensing section 21. At the same time, it increases the impact force that the fluctuating load can exert on the first pressure-sensing section 21, so as to ensure that when the fluctuating load is greater than the set value, the first baffle 2 and the second baffle 3 can rotate towards the direction of closing the protection pipe 1 to ensure the protection effect on the pressure vessel.

[0080] In a preferred embodiment, refer to Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , the rotation axes of the first baffle 2 and the second baffle 3 are both located on the flow-through surface perpendicular to the axial direction of the protection pipe 1. Then, when the first baffle 2 and the second baffle 3 are in the limit positions in the direction of closing the protection pipe 1, there are angles between the elastic member 4 and the first baffle 2 and the second baffle 3, so that the elastic member 4 can restore its deformation, and further ensure that the elastic member 4 can drive the first baffle 2 and the second baffle 3 to the initial positions.

[0081] Embodiment 5. In this embodiment, refer to Figure 5 , the first baffle 2 further includes a pressure-increasing section 23 provided at the end of the pressure-sensing section. The pressure-increasing section 23 is arranged at an angle with the first pressure-sensing section 21 and is located on the side of the first pressure-sensing section 21 close to the second baffle 3. Then, it further increases the area on which the fluctuating load can act on the first baffle 2, further increases the impact force exerted by the fluctuating load on the first baffle 2, and further improves the response efficiency of the first baffle 2, so as to greatly improve the protection effect on the pressure vessel.

[0082] Preferably, the first baffle 2 and the second baffle 3 have an initial position where the included angle between them is the smallest and a closed position where the included angle between them is the largest. When the first baffle 2 is in the initial position, the pressurizing section 23 is arranged perpendicular to the axial direction of the protection tube 1 to increase the impact force that the fluctuating load can exert on the pressurizing section 23, so as to further improve the response efficiency of the first baffle 2.

[0083] This application does not specifically limit the hinged manner of the first baffle 2 and the second baffle 3 to the protection tube 1. Preferably, hinge tubes are fixedly connected to the sides of the first baffle 2 and the second baffle 3 facing the liquid outlet, and hinge shafts connected to the protection tube 1 are arranged through the hinge tubes to realize the hinging of the first baffle 2 and the second baffle 3 to the protection tube 1. In other embodiments, the hinging of the first baffle 2 and the second baffle 3 to the protection tube 1 can also be realized by arranging hinge shafts through the first baffle 2 and the second baffle 3.

[0084] This application does not specifically limit the connection manner of the liquid inlet to the liquid outlet pipe 6 of the pressure source and the liquid outlet to the liquid inlet pipe 5 of the pressure vessel. Preferably, referring to Figure 1 and Figure 4 , flanges 12 are fixedly connected to both ends of the protection tube 1. That is to say, the liquid inlet is connected to the liquid outlet pipe 6 of the pressure source through the flange 12, and the liquid outlet is connected to the liquid inlet pipe 5 of the pressure vessel through the flange 12, so as to achieve the effect of facilitating the maintenance of the pre-protection device, and at the same time, it is also convenient to optimize the sealing between the protection tube 1 and the pressure source and the pressure vessel. In other embodiments, the liquid inlet and the liquid outlet can also be respectively connected to the liquid outlet pipe 6 of the pressure source and the liquid inlet pipe 5 of the pressure vessel by welding.

[0085] What is not described in this application can be realized by adopting or referring to the existing technology.

[0086] Each embodiment in this specification is described in a progressive manner. The same or similar parts between the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0087] The above are only the embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. A pre-protection device for a pressure vessel, characterized in that: include: A protective tube (1) having a liquid inlet and a liquid outlet opposite to the liquid inlet, the liquid inlet being connected to a liquid outlet pipe (6) of a pressure source, the liquid outlet being connected to a liquid inlet pipe (5) of a pressure vessel, the diameter of the protective tube (1) being greater than the diameter of the liquid outlet pipe (6) of the pressure source; a first baffle (2) which is arranged inside the protection tube (1) and is hinged to the protection tube (1); the first baffle (2) has a first pressure-sensing section (21) for sensing a fluctuating load; when the liquid outlet pipe (6) of the pressure source has a fluctuating load greater than a set value, the first baffle (2) rotates in a direction of closing the protection tube (1) under the action of the first pressure-sensing section (21); a second baffle (3) which is arranged inside the protective tube (1) and is hinged to the protective tube (1), the second baffle (3) being able to follow the first baffle (2) and rotate in a direction to close the protective tube (1); An elastic member (4) is arranged inside the protective tube (1) and acts on the first baffle plate (2) and the second baffle plate (3); when the first baffle plate (2) and the second baffle plate (3) rotate in a direction to close the protective tube (1), the elastic member (4) is deformed and exerts a reverse force on the first baffle plate (2) and the second baffle plate (3).

2. A pre-protection device for a pressure vessel according to claim 1, characterized in that: The first pressure-sensitive section (21) is located on the side of the rotation axis of the first baffle (2) close to the liquid inlet, the first baffle (2) also has a first follower section (22) located on the side of its own rotation axis away from the liquid inlet, the second baffle (3) has a second pressure-sensitive section (31) located on the side of its own rotation axis close to the liquid inlet and a second follower section (32) located on the side of its own rotation axis away from the liquid inlet, the sum of the lengths of the first pressure-sensitive section (21) and the second pressure-sensitive section (31) is greater than the distance between the rotation axis of the first baffle (2) and the rotation axis of the second baffle (3), and the first pressure-sensitive section (21) can act on the second pressure-sensitive section (31) so that when the first baffle (2) rotates in the direction of closing the protective tube (1), the second baffle (3) can rotate in the direction of closing the protective tube (1) under the action of the second pressure-sensitive section (31).

3. A pre-protection device for a pressure vessel according to claim 2, characterized in that: The length of the first pressure-sensing section (21) is greater than the length of the second pressure-sensing section (31).

4. A pre-protection device for a pressure vessel according to claim 1, characterized in that: The first baffle (2) is provided with a first gear (211) coaxially arranged with its own rotation axis, and the second baffle (3) is provided with a second gear (311) coaxially arranged with its own rotation axis, and the first gear (211) and the second gear (311) are meshed and transmission-connected.

5. A pre-protection device for a pressure vessel according to claim 1, characterized in that: The first baffle (2) also has a first follower segment (22), the second baffle (3) has a second follower segment (32) located on the side of its own rotation axis away from the liquid inlet, the elastic member (4) is an arc-shaped plate structure, and the two ends of the elastic member (4) are respectively connected to the first follower segment (22) and the second follower segment (32).

6. A pre-protection device for a pressure vessel according to claim 5, characterized in that: The first follower section (22) and the second follower section (32) are both provided with a plurality of connection grooves (221) spaced apart along their length direction, and both ends of the elastic member (4) are hingedly connected with a connection block (41) that is snap-fitted with one of the connection grooves (221).

7. A pre-protection device for a pressure vessel according to claim 1, characterized in that: The elastic member (4) is a tension spring, and both ends of the tension spring are respectively connected to one end of the first baffle plate (2) and the second baffle plate (3) close to the liquid outlet.

8. A pre-protection device for a pressure vessel according to claim 1, characterized in that: The diameter of the liquid outlet pipe (6) of the pressure source is smaller than the diameter of the liquid inlet pipe (5) of the pressure container, and both are coaxially arranged with the protection pipe (1).

9. A pre-protection device for a pressure vessel according to claim 1, characterized in that: The diameter of the liquid outlet pipe (6) of the pressure source is equal to the diameter of the liquid inlet pipe (5) of the pressure vessel, and the protection pipe (1) is provided with a flow guide pipe (11) located upstream of the first baffle (2) and the second baffle (3), and the diameter of the flow guide pipe (11) gradually increases in a direction away from the first baffle (2) and the second baffle (3).

10. A pre-protection device for a pressure vessel according to any one of claims 1 to 9, characterized in that: The rotation axis of the first baffle (2) and the rotation axis of the second baffle (3) are both located on a flow-through surface arranged perpendicular to the axial direction of the protective tube (1); And / or, the first baffle (2) further comprises a pressure-boosting section (23) arranged at the end of the first pressure-sensing section (21), the pressure-boosting section (23) being arranged at an angle with the first pressure-sensing section (21) and being located on a side of the first pressure-sensing section (21) close to the second baffle (3).

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