Anti-overcharge device in pressure vessel
By designing an anti-overcharge device with float ball and baffle, the problems of large size, heavy, high cost and effective anti-overcharge space of traditional devices are solved, and the simple structure, high sensitivity and fast reaction are achieved. The anti-overcharge effect reduces the preparation cost.
Patent Information
- Application Number
- CN202421275393.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-06-05
AI Technical Summary
Traditional LNG cylinder anti-overcharge device has problems such as large size, heavy weight, high cost and effective anti-overcharge space, which is difficult to meet the needs of lightweight and low cost.
An anti-overcharge device including liquid inlet pipe, float ball and baffle is designed. The float ball moves up and down with the change of liquid level, driving the swing rod and baffle to achieve a quick separation between the liquid inlet and the drain port to avoid Overcharge.
It realizes the anti-overcharge effect of simple structure, small size, high sensitivity and fast reaction, reduces the preparation cost and meets the needs of lightweight and low cost.
Smart Images
Figure CN222527407U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure vessels, in particular to an overfill prevention device in a pressure vessel. Background Art
[0002] In order to avoid safety accidents, pressure vessels usually have liquid level requirements when filling to prevent them from being filled or overfilled. For example, LNG cylinders. Since liquefied natural gas is a low-temperature gas and there is a certain pressure in the vehicle-mounted LNG cylinder, the LNG liquid in the LNG cylinder cannot be filled to the brim. A certain amount of space needs to be left. Usually, the maximum volume of LNG liquid cannot exceed about 90% of the volume of the LNG cylinder. The structure of the anti-overfilling device in the traditional LNG cylinder includes: an anti-overfilling cylinder is welded at a coaxial position on the rear head of the LNG cylinder, and the interior of the anti-overfilling cylinder is an anti-overfilling space. A small hole is opened at the bottom of the anti-overfilling cylinder, which is connected to the inner cavity of the vehicle-mounted cylinder. Once the LNG liquid level in the vehicle-mounted cylinder exceeds the maximum value, the LNG liquid in the vehicle-mounted cylinder will enter the anti-overfilling space through the small hole, thereby preventing the LNG cylinder from being overfilled.
[0003] The applicant found that the above-mentioned traditional anti-overfilling device has the following defects during long-term use: First, the volume of the anti-overfilling cylinder is relatively large and the weight is relatively heavy, which is not conducive to the lightweight development of vehicle-mounted gas cylinders; Second, the anti-overfilling cylinder needs to be welded and installed in the vehicle-mounted gas cylinder, which greatly increases the cost of the vehicle-mounted gas cylinder; Third, the anti-overfilling space reaches a gas-liquid balance in the two spaces after the LNG gas cylinder completes the first filling, and the high-level liquid gradually flows into the anti-overfilling space through the small holes at the bottom. During use, the inner tank liquid is used first. During the subsequent filling process, due to the presence of liquid in the anti-overfilling space, the effective anti-overfilling space becomes smaller, which cannot meet the requirements of the initial design of the anti-overfilling effective space.
[0004] In order to overcome the above defects, the applicant has developed a new type of overcharging prevention device. Utility Model Content
[0005] The technical problem to be solved by the utility model is to provide an overfill prevention device in a pressure vessel, which has a simple, light and small structure, high sensitivity, fast response, practicality and low preparation cost.
[0006] In order to solve the above problems, the technical solution adopted by the utility model is: an overfill prevention device in a pressure vessel, comprising a liquid inlet mechanism fixedly arranged in the pressure vessel, the liquid inlet mechanism comprising: a liquid inlet pipeline, both ends of the liquid inlet pipeline are respectively provided with a liquid inlet and a liquid discharge port for communicating with the inner cavity of the pressure vessel, a containing shell is arranged at the bottom of the liquid inlet pipeline, and the inner cavity of the containing shell is connected with the liquid inlet pipeline;
[0007] A mounting shaft is hinged in the accommodating shell, and a baffle is fixedly arranged on the mounting shaft. One end of the mounting shaft extends out of the accommodating shell and is fixed to one end of a swing rod, and the other end of the swing rod is provided with a float ball that can float in the liquid contained in the pressure vessel; an upper blocking mechanism is provided in the liquid inlet pipeline, and the up and down movement of the float ball can drive the swing rod to drive the baffle plate to rotate downward from the position of the upper blocking mechanism to be located in the accommodating shell or to rotate upward from the accommodating shell to be blocked by the upper blocking mechanism. When the baffle plate is blocked by the upper blocking mechanism, the liquid inlet and liquid discharge port of the liquid inlet pipeline are separated; after the baffle plate is separated from the upper blocking mechanism, the liquid inlet and liquid discharge port of the liquid inlet pipeline are connected; the liquid inlet port is arranged relative to the baffle plate on the side where the liquid in the liquid inlet port can have an upward pushing effect on the upwardly flipped baffle plate when the baffle plate is flipped upward to the free end of the baffle plate is located in the liquid inlet pipeline.
[0008] Furthermore, in the aforementioned overfill prevention device in the pressure vessel, the bottom plate of the containment shell is an inclined plate, and the baffle rotates downward from the upper blocking mechanism position into the containment shell until it fits on the bottom plate of the containment shell.
[0009] Furthermore, in the aforementioned overfill prevention device in the pressure vessel, the structure of the upper blocking mechanism includes: an upper partition plate arranged in the liquid inlet pipe, a connecting port being opened on the upper partition plate; the baffle plate is blocked by the upper partition plate and covers the connecting port, thereby separating the liquid inlet and the liquid discharge port of the liquid inlet pipe.
[0010] Furthermore, in the aforementioned overfill prevention device in the pressure vessel, the upper partition is obliquely arranged in the liquid inlet pipe, and the horizontal angle between the upper partition and one side of the liquid inlet is 20° to 70°.
[0011] Furthermore, in the aforementioned overfill prevention device in the pressure vessel, a connecting plate is provided on the top of the liquid inlet pipe, and the connecting plate is fixed to the top of the inner cavity of the pressure vessel.
[0012] The utility model has the advantages that the float moves up and down with the change of the liquid level in the containment shell, thereby driving the swing rod to drive the baffle to rotate downward from the upper blocking mechanism to the containment shell or rotate upward from the containment shell to be blocked by the upper blocking mechanism. Once the liquid level in the pressure vessel reaches the maximum limit, the free end of the baffle is located in the liquid inlet pipe. Under the impact of the liquid in the liquid inlet, the baffle can accelerate to flip upward to the upper blocking mechanism stuck in the liquid inlet pipe and quickly block the liquid inlet and the liquid discharge port, which can effectively prevent the pressure vessel from being overfilled. The structure of the entire anti-overfilling device is simple and ingenious, small in size, high in sensitivity, fast in response, practical, and low in preparation cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1It is a structural schematic diagram of the overfill prevention device in the pressure vessel described in the utility model.
[0014] Figure 2 yes Figure 1 Schematic diagram of the installation structure of the middle swing rod and the float.
[0015] Figure 3 It is a schematic structural diagram of a state in which a baffle in an overfill prevention device in a pressure vessel of the utility model rotates downward to fit on a bottom plate of a containing shell.
[0016] Figure 4 The utility model is a schematic structural diagram of a state in which a baffle in an overfill prevention device in a pressure vessel rotates upward until it is blocked by an upper blocking mechanism. DETAILED DESCRIPTION
[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments.
[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the overfill prevention device in the pressure vessel comprises a liquid inlet mechanism fixedly arranged in the pressure vessel 1, the liquid inlet mechanism comprises: a liquid inlet pipeline 2, the two ends of the liquid inlet pipeline 2 are respectively provided with a liquid inlet 21 and a liquid discharge port 22 for communicating with the inner cavity of the pressure vessel 1, and a containing shell 3 is arranged at the bottom of the liquid inlet pipeline 2, and the inner cavity of the containing shell 3 is connected with the liquid inlet pipeline 2. In this embodiment, the fixed installation structure of the liquid inlet mechanism in the pressure vessel 1 comprises: a connecting plate 8 is arranged at the top of the liquid inlet pipeline 2, and the connecting plate 8 is fixed at the top of the inner cavity of the pressure vessel 1. The liquid inlet 21 can be used to connect with the liquid inlet pipeline.
[0019] A mounting shaft 31 is hingedly connected in the housing 3, and a baffle 4 is fixedly arranged on the mounting shaft 31. One end of the mounting shaft 31 extends out of the housing 3 and is fixed to one end of a swing rod 5. The other end of the swing rod 5 is provided with a float 6 that can float in the liquid contained in the pressure vessel 1. An upper blocking mechanism 7 is provided in the liquid inlet pipeline 2. The upward and downward movement of the float 6 can drive the swing rod 5 to drive the baffle 4 to rotate downward from the position of the upper blocking mechanism 7 to be located in the housing 3 or to rotate upward from the housing 3 to be blocked by the upper blocking mechanism 7. When the baffle 4 is blocked by the upper blocking mechanism 4, the liquid inlet 21 of the liquid inlet pipeline 2 is separated from the liquid discharge port 22. When the baffle 4 is separated from the blocking state of the upper blocking mechanism 4, the liquid inlet 21 of the liquid inlet pipeline 2 is connected with the liquid discharge port 22. The liquid inlet 21 is arranged relative to the baffle 4 on a side where, when the baffle 4 is flipped upwards and the free end of the baffle 4 is located in the liquid inlet pipe 2, the liquid in the liquid inlet 21 can push the flipped baffle 4 upwards.
[0020] In this embodiment, the bottom plate 32 of the accommodating shell 3 is an inclined plate, and the baffle 4 rotates downward from the upper blocking mechanism 7 into the accommodating shell 3 until it is attached to the bottom plate 32 of the accommodating shell 3 .
[0021] Specifically, the structure of the upper blocking mechanism 7 includes: an upper baffle 71 disposed in the liquid inlet pipe 2, and a communication port 72 is provided on the upper baffle 71; the baffle 4 is blocked by the upper baffle 71 and covers the communication port 72, so that the liquid inlet 21 and the liquid discharge port 22 of the liquid inlet pipe 2 are separated. In order to achieve a rapid separation of the liquid inlet 21 and the liquid discharge port 22, the upper baffle 71 is tiltedly disposed in the liquid inlet pipe 2, and the horizontal angle θ between the upper baffle 71 and one side of the liquid inlet 21 is 20° to 70°, and the angle θ can be determined according to actual needs.
[0022] The working process is as follows: when the liquid level in the pressure vessel 1 is lower than the limit minimum liquid level, the gravity of the float 6 is greater than the buoyancy of the float 6. At this time, the float 6 will move downward and drive the swing rod 5 to drive the baffle 4 on the mounting shaft 31 to flip downward and break away from the upper blocking mechanism 7, so that the liquid inlet 21 is connected to the liquid outlet 22. In this state, the liquid enters the inner cavity of the pressure vessel 1 through the liquid inlet 21, the connecting port 72, and the liquid outlet 22 of the liquid inlet pipe 2. See FIG. Figure 3 shown.
[0023] When the liquid level in the pressure vessel 1 gradually rises to the point where the gravity of the float 6 is equal to the buoyancy of the float 6 , the float 6 will gradually move upward as the liquid level rises, thereby driving the swing rod 5 to drive the baffle 4 on the mounting shaft 31 to gradually flip upward.
[0024] When the liquid level in the pressure vessel 1 reaches the maximum liquid level, the baffle 4 flips upward until the free end of the baffle is located in the liquid inlet pipe. Under the impact of the liquid in the liquid inlet 21, the baffle 4 can accelerate to flip upward to block the upper partition 71 in the liquid inlet pipe 2 and block the connecting port 72, thereby blocking the liquid inlet 21 and the liquid discharge port 22, so as to effectively prevent the pressure vessel 1 from being overfilled. Figure 4 shown.
[0025] The utility model provides an overfill prevention device in a pressure vessel. The float moves up and down with the change of the liquid level, which drives the swing rod to drive the baffle to rotate downward from the upper blocking mechanism to the position in the containing shell or rotate upward from the containing shell to be blocked by the upper blocking mechanism. Once the liquid level in the pressure vessel reaches the maximum limit level and the baffle 4 flips upward to enter the liquid inlet pipe 2, under the impact of the liquid in the liquid inlet 21, the baffle 4 can accelerate the upward flip to the upper partition 71 stuck in the liquid inlet pipe 2, and quickly block the connecting port 72 to block the liquid inlet 21 and the liquid discharge port 22, which can effectively prevent the pressure vessel 1 from being overfilled. The structure of the entire overfill prevention device is simple and ingenious, small in size, high in sensitivity, fast in response, practical, and low in preparation cost.
Claims
1. An overfill prevention device in a pressure vessel, comprising a liquid inlet mechanism fixedly arranged in the pressure vessel, characterized in that: The liquid inlet mechanism comprises: a liquid inlet pipeline, wherein both ends of the liquid inlet pipeline are respectively provided with a liquid inlet and a liquid discharge port for communicating with the inner cavity of the pressure container, and a containing shell is provided at the bottom of the liquid inlet pipeline, and the inner cavity of the containing shell is connected with the liquid inlet pipeline; A mounting shaft is hinged in the accommodating shell, a baffle is fixedly arranged on the mounting shaft, one end of the mounting shaft extends out of the accommodating shell and is fixed to one end of a swing rod, and the other end of the swing rod is provided with a float ball that can float in the liquid contained in the pressure vessel; an upper blocking mechanism is provided in the liquid inlet pipeline, and the up and down movement of the float ball can drive the swing rod to drive the baffle plate to rotate downward from the position of the upper blocking mechanism to be located in the accommodating shell, or to rotate upward from the accommodating shell to be blocked by the upper blocking mechanism, and when the baffle plate is blocked by the upper blocking mechanism, the liquid inlet and the liquid discharge port of the liquid inlet pipeline are separated; after the baffle plate is separated from the upper blocking mechanism, the liquid inlet and the liquid discharge port of the liquid inlet pipeline are connected; the liquid inlet port is arranged relative to the baffle plate on the side where the liquid in the liquid inlet port can have an upward pushing effect on the upwardly flipped baffle plate when the baffle plate is flipped upward to the free end of the baffle plate is located in the liquid inlet pipeline.
2. The overfill prevention device in a pressure vessel according to claim 1, characterized in that: The bottom plate of the accommodating shell is an inclined plate, and the baffle plate rotates downward from the upper blocking mechanism position into the accommodating shell until it is attached to the bottom plate of the accommodating shell.
3. The overfill prevention device in a pressure vessel according to claim 1, characterized in that: The structure of the upper blocking mechanism includes: an upper partition plate arranged in the liquid inlet pipeline, on which a communication port is opened; the baffle plate is blocked by the upper partition plate and covers the communication port, thereby isolating the liquid inlet and the liquid discharge port of the liquid inlet pipeline.
4. The overfill prevention device in the pressure vessel according to claim 3, characterized in that: The upper partition is tiltedly arranged in the liquid inlet pipe, and the horizontal angle between the upper partition and one side of the liquid inlet is 20° to 70°.
5. The overfill prevention device in a pressure vessel according to claim 1, characterized in that: A connecting plate is arranged on the top of the liquid inlet pipe, and the connecting plate is fixed on the top of the inner cavity of the pressure container.