LNG vehicle-mounted gas cylinder pressurized gas return rear end overflow valve device

Abstract

The utility model discloses a LNG vehicle-mounted gas cylinder pressure-increasing back gas rear end overflow valve device relates to LNG vehicle-mounted gas cylinder technical field, including LNG vehicle-mounted gas cylinder main part, the upper end surface intercommunication connection of LNG vehicle-mounted gas cylinder main part has the pressure-increasing back gas pipeline, the natural gas of the vaporizer liquefaction is guided to the valve body main part in the utility model, and the sealing plate is pressed by spring and telescopic sleeve rod on the fixed plate, and the sealing plate is separated with the clamping groove seat, and the guidance of natural gas is carried out, when stopping work, the sealing plate is affected by spring, and the sealing plate is pasted with the clamping groove seat through the rubber ring, and the tightness of sealing surface is strengthened, prevents the backflow, thereby avoids the leakage risk that possibly causes backflow, and specifically when working, natural gas can smoothly pass through the valve body, and the normal operation of pressure-increasing back gas system is ensured, and when stopping work, the sealing plate can reset quickly, prevents gas leakage, thereby improve the operation efficiency of whole system.

Description

TECHNICAL FIELD

[0001] The utility model relates to LNG vehicle-mounted gas cylinder technical field, specifically to a kind of LNG vehicle-mounted gas cylinder pressure-increasing back-end overflow valve device. BACKGROUND

[0002] LNG is a kind of clean energy, and its application in the field of transportation is more and more extensive. LNG vehicle-mounted gas cylinder, as an important equipment for storing LNG, its safety and reliability are the primary consideration in design and use.

[0003] During the use of the gas cylinder, the pressure-increasing back gas is the process of liquefying gaseous natural gas and returning to the gas cylinder. During this process, the stability and safety of the gas flow need to be controlled.

[0004] The existing LNG vehicle-mounted gas cylinder pressure-increasing back gas system lacks the function of real-time monitoring of the pressure in the system, making it difficult for the operator to discover and handle potential pressure abnormalities in a timely manner, thereby increasing the instability and safety hazards of the system. In particular, when the gas flow is abnormal, the traditional overflow valve device is often not convenient to shut off or limit the flow, leading to safety accidents such as overpressure of the gas cylinder or damage to the pipeline, and the overflow valve device is prone to backflow and leakage risk when it stops working while guiding natural gas.

[0005] Therefore, in view of the above problems, the existing structure is improved, and a LNG vehicle-mounted gas cylinder pressure-increasing back-end overflow valve device and its control method are proposed. INVENTION CONTENTS

[0006] The utility model aims at providing a LNG vehicle-mounted gas cylinder pressure-increasing back-end overflow valve device to solve the problem of the existing LNG vehicle-mounted gas cylinder pressure-increasing back gas system lacking real-time monitoring of the pressure in the system, making it difficult for the operator to discover and handle potential pressure abnormalities in a timely manner, thereby increasing the instability and safety hazards of the system. In particular, when the gas flow is abnormal, the traditional overflow valve device is often not convenient to shut off or limit the flow, leading to safety accidents such as overpressure of the gas cylinder or damage to the pipeline, and the overflow valve device is prone to backflow and leakage risk when it stops working while guiding natural gas.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: a LNG vehicle-mounted gas cylinder pressure-increasing back-end overflow valve device, comprising a LNG vehicle-mounted gas cylinder main body, the upper end surface of the LNG vehicle-mounted gas cylinder main body is connected with a pressure-increasing back gas pipeline through communication, the outer wall of the pressure-increasing back gas pipeline is provided with a pressure gauge, the other end of the pressure-increasing back gas pipeline is connected with a vaporizer, the other end of the vaporizer is provided with a valve body main body connected through a communication assembly;

[0008] The inner wall of the valve body main part is fixedly connected with a fixed support, the inner wall of the fixed support is provided with a fixed plate connected through a fixed component, the inner wall of the fixed plate is fixedly connected with a spring, the tail end of the spring is fixedly connected with a sealing plate, the front of the sealing plate is fixedly connected with a clamping groove seat in the inner wall of the valve body main part, the clamping groove seat is connected with the sealing plate in correspondence, and the inside of the valve body main part is provided with a group of valve core seats for opening and closing of flow.

[0009] Further, the communication assembly comprises a first pipeline connected in communication at the other end of the vaporizer, the valve body main part is located at the tail end of the first pipeline, the other end of the valve body main part is connected in communication with a second pipeline, and the output end of the second pipeline is connected in communication with the LNG vehicle-mounted gas cylinder main part.

[0010] Further, the upper end surface of the LNG vehicle-mounted gas cylinder main part is provided with a group of control systems, the control systems are electrically connected with pressure gauges, and the control systems are provided with a group of indicator lamps.

[0011] Further, the inner wall of the clamping groove seat is fixedly connected with a rubber ring, the fixed component comprises a plurality of supporting rods fixedly connected in uniformity on the inner wall of the fixed support, the fixed plate is fixedly connected at the tail end of the supporting rods, the sealing plate is fixedly connected with an expansion sleeve rod at the edge of the spring side wall, and the other end of the expansion sleeve rod is fixedly connected with the fixed plate.

[0012] Further, a threaded rod is screwedly connected to the inside center of the valve core seat, a valve core plate is rotatably connected to the lower end of the threaded rod, the valve core plate is slidably connected with the valve core seat, and a nut is fixedly connected to the upper end of the threaded rod.

[0013] Further, the upper end surface edge of the LNG vehicle-mounted gas cylinder main part is fixedly connected with an annular guard plate.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] Firstly, when the natural gas liquefied by the vaporizer is guided to the valve body main part, the sealing plate is compressed on the fixed plate through the spring and the expansion sleeve rod after the valve core seat, the sealing plate is separated from the clamping groove seat, the natural gas is guided, when the work is stopped, the sealing plate is combined with the clamping groove seat through the rubber ring under the action of the spring, the tightness of the sealing surface is enhanced, backflow is prevented, the risk of leakage caused by backflow is avoided, specifically, when the work is carried out, the natural gas can smoothly pass through the valve body, the normal operation of the pressure boosting back gas system is ensured, when the work is stopped, the sealing plate can be quickly reset, gas leakage is prevented, and the operation efficiency of the whole system is improved.

[0016] Secondly, the pressure gauge arranged on the outer wall of the pressurizing return gas pipeline enables the operator to monitor the pressure condition in the system in real time, which helps to find and handle potential pressure abnormality in time, ensures stable operation of the system, the control system receives the signal of the pressure gauge, monitors the pressure condition in the gas cylinder in real time, displays the pressure state through the indicator light, then rotates the threaded rod through the nut, drives the valve core plate to slide in the valve core seat, controls the opening of the valve core seat, thereby controls the flow of natural gas, improves the flexibility of the device, can automatically cut off or limit the flow when the gas flow is abnormal, prevents overpressure of the gas cylinder or damage of the pipeline, ensures safe operation of the system, and prevents safety accidents. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic view of the three-dimensional structure of the LNG vehicle-mounted gas cylinder body;

[0018] Figure 2 is a schematic view of the three-dimensional structure of the upper end face of the LNG vehicle-mounted gas cylinder body;

[0019] Figure 3 is a schematic view of the connection of the valve body inside;

[0020] Figure 4 is a schematic view of the connection inside the valve core seat.

[0021] In the figure: 1, LNG vehicle-mounted gas cylinder body; 2, annular guard plate; 201, pressurizing return gas pipeline; 202, pressure gauge; 3, control system; 301, indicator light; 4, vaporizer; 401, first pipeline; 402, valve body; 403, second pipeline; 5, valve core seat; 6, fixed support; 601, support rod; 602, fixed plate; 603, spring; 604, sealing plate; 7, clamping groove seat; 701, rubber ring; 8, threaded rod; 801, valve core plate; 802, nut. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0023] Embodiment one

[0024] As Figure 1 - Figure 4As shown, a LNG vehicle gas cylinder pressurized gas return rear end overflow valve device, including LNG vehicle gas cylinder body 1, the upper end surface of LNG vehicle gas cylinder body 1 is connected with pressurized gas return pipeline 201, the outer wall of pressurized gas return pipeline 201 is provided with pressure gauge 202, the pressure gauge 202 provided on the outer wall of pressurized gas return pipeline 201 enables the operator to monitor the pressure in the system in real time, which helps to discover and handle potential pressure abnormalities in time, ensuring the stable operation of the system, the other end of pressurized gas return pipeline 201 is connected with vaporizer 4, the other end of vaporizer 4 is provided with valve body 402 connected through a communication assembly, during the use of the gas cylinder, pressurized gas return pipeline 201 is the process of liquefying gaseous natural gas and returning to the gas cylinder, specifically, pressurized gas return pipeline 201 guides the gaseous natural gas in the gas cylinder to vaporizer 4 for liquefaction, then returns to the gas cylinder after controlling the flow through valve body 402, to maintain the pressure stability in the gas cylinder, mainly using the cooling effect of vaporizer 4 to liquefy gaseous natural gas;

[0025] The inner wall of valve body 402 is fixedly connected with fixed support 6, the inner wall of fixed support 6 is provided with fixed plate 602 connected through a fixed assembly, the inner wall of fixed plate 602 is fixedly connected with spring 603, the distal end of spring 603 is fixedly connected with sealing plate 604, the front of sealing plate 604 is fixedly connected with clamping groove seat 7 in the inner wall of valve body 402, clamping groove seat 7 is connected with sealing plate 604 in correspondence, the inside of valve body 402 is provided with a group of valve core seats 5 for opening and closing the flow.

[0026] Further, the communication assembly includes first pipeline 401 connected in communication at the other end of vaporizer 4, valve body 402 is located at the distal end of first pipeline 401, the other end of valve body 402 is connected in communication with second pipeline 403, the output end of second pipeline 403 is in communication with LNG vehicle gas cylinder body 1, after warming and expansion by vaporizer 4, LNG vaporizes into gaseous natural gas, this process can prevent the pressure in the pipeline from being too high, ensuring the safe operation of the system, guiding the liquefied natural gas after vaporizer 4 to valve body 402 for flow control, then returning to the gas cylinder through second pipeline 403.

[0027] Further, the upper end surface of LNG vehicle gas cylinder body 1 is provided with a group of control systems 3, control system 3 is electrically connected with pressure gauge 202, a group of indicator lights 301 are provided on control system 3, control system 3 monitors the pressure in the gas cylinder in real time by receiving the signal of pressure gauge 202, and displays the pressure state through indicator light 301, specifically, the pressure in the gas cylinder is converted into an electrical signal by a pressure sensor, then transmitted to control system 3 for processing and display, which belongs to the prior art and will not be described in more detail.

[0028] Further, the inner wall of the clamping groove seat 7 is fixedly connected with a rubber ring 701, the fixing assembly includes that the inner wall of the fixing support 6 is uniformly fixedly connected with a supporting rod 601, a fixing plate 602 is fixedly connected at the end of the supporting rod 601, a sealing plate 604 is fixedly connected with an elastic sleeve rod 605 at the edge of the side wall of the spring 603, the other end of the elastic sleeve rod 605 is fixedly connected with the fixing plate 602, when the liquefied natural gas after the vaporizer 4 is guided to the valve body main part 402, after passing through the valve core seat 5, the sealing plate 604 is pressed, the sealing plate 604 is compressed on the fixing plate 602 through the spring 603 and the elastic sleeve rod 605, the sealing plate 604 is separated from the clamping groove seat 7, and the natural gas is guided, when stopping working, the sealing plate 604 is pressed by the spring 603, the sealing plate 604 is attached to the clamping groove seat 7 through the rubber ring 701, the tightness of the sealing surface is enhanced, backflow is prevented, and thus the risk of leakage caused by backflow is avoided, specifically, when working, the natural gas can smoothly pass through the valve body, the normal operation of the pressure boosting gas return system is ensured, and when stopping working, the sealing plate can be quickly reset, gas leakage is prevented, and thus the operation efficiency of the whole system is improved.

[0029] Further, the inner wall of the clamping groove seat 7 is fixedly connected with a rubber ring 701, the fixing assembly includes that the inner wall of the fixing support 6 is uniformly fixedly connected with a supporting rod 601, a fixing plate 602 is fixedly connected at the end of the supporting rod 601, a sealing plate 604 is fixedly connected with an elastic sleeve rod 605 at the edge of the side wall of the spring 603, the other end of the elastic sleeve rod 605 is fixedly connected with the fixing plate 602, when the liquefied natural gas after the vaporizer 4 is guided to the valve body main part 402, after passing through the valve core seat 5, the sealing plate 604 is pressed, the sealing plate 604 is compressed on the fixing plate 602 through the spring 603 and the elastic sleeve rod 605, the sealing plate 604 is separated from the clamping groove seat 7, and the natural gas is guided, when stopping working, the sealing plate 604 is pressed by the spring 603, the sealing plate 604 is attached to the clamping groove seat 7 through the rubber ring 701, the tightness of the sealing surface is enhanced, backflow is prevented, and thus the risk of leakage caused by backflow is avoided, specifically, when working, the natural gas can smoothly pass through the valve body, the normal operation of the pressure boosting gas return system is ensured, and when stopping working, the sealing plate can be quickly reset, gas leakage is prevented, and thus the operation efficiency of the whole system is improved.

[0030] Embodiment two

[0031] As Figure 1 and Figure 4 shown, the utility model provides a kind of LNG vehicle-mounted gas cylinder pressure boosting gas return rear-end overflow valve device, compared with embodiment one, as another embodiment of the utility model, the upper end surface edge of LNG vehicle-mounted gas cylinder main part 1 is fixedly connected with annular guard plate 2, gas cylinder upper end surface is protected, while increasing aesthetic property.

[0032] The use method includes the following steps:

[0033] Step one: first, the pressurized gas return line 201 will guide the gaseous natural gas in the cylinder to the vaporizer 4 for liquefaction, and the vaporizer 4 uses the cooling effect to liquefy the gaseous natural gas, ensuring that the natural gas returns to the cylinder in liquid form. Specifically, during the use of the cylinder, the pressurized gas return line 201 is the process of re-liquefying the gaseous natural gas and returning it to the cylinder. Specifically, the pressurized gas return line 201 guides the gaseous natural gas in the cylinder to the vaporizer 4 for liquefaction, and then returns to the cylinder after controlling the flow through the valve body 402 to maintain the pressure stability in the cylinder, mainly using the cooling effect of the vaporizer 4 to liquefy the gaseous natural gas.

[0034] Step two: the liquefied natural gas enters the valve body 402 through the first pipeline 401, where the flow is controlled. The valve core seat 5 and sealing plate 604 and other components inside the valve body 402 work together to adjust the flow of natural gas according to system requirements.

[0035] Step three: the natural gas after flow control returns to the cylinder through the second pipeline 403. When stopping work, the sealing plate 604 is tightly fitted with the rubber ring 701 on the clamping groove seat 7 under the action of the spring 603, preventing backflow or leakage of natural gas. Specifically, when the vaporizer 4 liquefied natural gas is guided to the valve body 402, the sealing plate 604 is under pressure after passing through the valve core seat 5. The sealing plate 604 is compressed on the fixed plate 602 by the spring 603 and the telescopic sleeve rod 605, and the sealing plate 604 is separated from the clamping groove seat 7 to guide the natural gas. When stopping work, the sealing plate 604 is affected by the spring 603, and the sealing plate 604 is fitted with the clamping groove seat 7 through the rubber ring 701, enhancing the tightness of the sealing surface and preventing backflow.

[0036] Step four: by rotating the nut 802, the threaded rod 8 is rotated inside the valve core seat 5, thereby controlling the opening of the valve core seat 5, realizing the accurate adjustment of the natural gas flow. Specifically, the threaded rod 8 is rotated by the nut 802, driving the valve core plate 801 to slide inside the valve core seat 5, controlling the opening of the valve core seat 5, thereby controlling the flow of natural gas, and improving the flexibility of the device.

[0037] Working principle: in the use process of the gas cylinder, the pressurizing return gas pipeline 201 is the process of liquefying gaseous natural gas and returning to the gas cylinder, specifically, the pressurizing return gas pipeline 201 guides the gaseous natural gas in the gas cylinder to the vaporizer 4 for liquefaction, then returns to the gas cylinder after controlling the flow through the valve body main part 402, so as to maintain the pressure stability in the gas cylinder, then the pressure gauge 202 arranged on the outer wall of the pressurizing return gas pipeline 201 enables the operator to monitor the pressure condition in the system in real time, which helps to find and handle potential pressure abnormalities in time, ensures the stable operation of the system, and the screw cap 802 is used to rotate the threaded rod 8, drives the valve core plate 801 to slide in the valve core seat 5, controls the opening effect of the valve core seat 5, thereby controlling the flow of natural gas, improves the flexibility of the device, finally when the liquefied natural gas of the vaporizer 4 is guided to the valve body main part 402, passes through the valve core seat 5, the sealing plate 604 is pressed, the sealing plate 604 is compressed on the fixed plate 602 through the spring 603 and the telescopic sleeve rod 605, the sealing plate 604 is separated from the clamping groove seat 7, and the natural gas is guided, when stopping working, the sealing plate 604 is pressed by the spring 603, the sealing plate 604 is attached to the clamping groove seat 7 through the rubber ring 701, the tightness of the sealing surface is enhanced, and backflow is prevented.

[0038] Embodiments of the present application are given for the purpose of example and description, and are not exhaustive or limit the present application to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles and practical application of the present application, and to enable those of ordinary skill in the art to understand the present application so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A LNG vehicle cylinder pressure boosting gas return rear end over flow valve device, comprising a LNG vehicle cylinder main body (1), characterized in that, The upper end surface of the LNG vehicle-mounted gas cylinder body (1) is connected with a booster return gas pipeline (201), the outer wall of the booster return gas pipeline (201) is provided with a pressure gauge (202), the other end of the booster return gas pipeline (201) is connected with a vaporizer (4), and the other end of the vaporizer (4) is provided with a valve body (402) connected through a communication assembly. The inner wall of the valve body (402) is fixedly connected with a fixed support (6), the inner wall of the fixed support (6) is provided with a fixed plate (602) connected through a fixed assembly, the inner wall of the fixed plate (602) is fixedly connected with a spring (603), the distal end of the spring (603) is fixedly connected with a sealing plate (604), the front of the sealing plate (604) is fixedly connected with a clamping groove seat (7) in the inner wall of the valve body (402), the clamping groove seat (7) is connected with the sealing plate (604), and the inside of the valve body (402) is provided with a group of valve core seats (5) for opening and closing the flow.

2. The LNG vehicle-mounted gas cylinder pressure-increasing back gas return end overflow valve device according to claim 1, characterized in that, The communication assembly includes a first pipeline (401) connected in communication with the other end of the vaporizer (4), the valve body (402) is located at the distal end of the first pipeline (401), and the other end of the valve body (402) is connected in communication with a second pipeline (403), and the output end of the second pipeline (403) is connected in communication with the LNG vehicle-mounted gas cylinder body (1).

3. The LNG vehicle-mounted gas cylinder pressure-increasing return gas rear-end overcurrent valve device according to claim 1, characterized in that, A group of control systems (3) are arranged on the upper end surface of the LNG vehicle-mounted gas cylinder body (1), the control systems (3) are electrically connected with the pressure gauge (202), and a group of indicator lights (301) are arranged on the control systems (3).

4. The LNG vehicle-mounted gas cylinder pressure-increasing back gas end overflow valve device according to claim 1, characterized in that, The inner wall of the clamping groove seat (7) is fixedly connected with a rubber ring (701), the fixed assembly includes a plurality of supporting rods (601) fixedly connected to the inner wall of the fixed support (6), the fixed plate (602) is fixedly connected to the distal end of the supporting rod (601), the sealing plate (604) is fixedly connected to the edge of the spring (603) on one side wall, and the sealing plate (604) is fixedly connected to the other end of the fixed plate (602).

5. The LNG vehicle-mounted gas cylinder pressure boosting return gas rear-end overcurrent valve device according to claim 4, characterized in that, The inside of the valve core seat (5) is threadedly connected with a threaded rod (8), the lower end of the threaded rod (8) is rotatably connected with a valve core plate (801), the valve core plate (801) is slidably connected with the valve core seat (5), and the upper end of the threaded rod (8) is fixedly connected with a nut (802).

6. The LNG vehicle-mounted cylinder pressure boosting gas return rear-end overcurrent valve device according to claim 1, characterized in that, The upper end surface of the LNG vehicle-mounted gas cylinder body (1) is fixedly connected with an annular guard plate (2).

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