A pneumatic natural gas pressurizing device

Abstract

The utility model discloses a kind of pneumatic natural gas pressurizing devices, the pneumatic natural gas pressurizing device, comprising: pressurizing cylinder, pressurizing cylinder is provided with the cavity of cylindrical shape, the inside movable piston rod of cavity is provided with, piston rod is used to separate into first cavity and second cavity with cavity, first cavity is connected with first gas supply tank by first pipeline, second cavity is connected with second gas tank by second pipeline, second cavity is connected with third gas tank by third pipeline, both ends of piston rod are sequentially sleeved with elastic member, first sealing ring and second sealing ring, one end of elastic member abuts on first sealing ring, first sealing ring is provided with clamping portion, second sealing ring is provided with the clamping groove matched with the clamping portion. The pneumatic natural gas pressurizing device of above structure is moved by compressed air to push piston rod, and the cooperation of first sealing ring and second sealing ring is used to improve sealing, and it is beneficial to improve the pressurization effect of natural gas.

Description

Technical Field

[0001] This utility model relates to the technical field of natural gas pressurization, and in particular to a pneumatic natural gas pressurization device. Background Technology

[0002] Currently, natural gas boosting technologies mainly include centrifugal compression and reciprocating compression. Among them, the core working principle of reciprocating compression is to drive a piston to reciprocate within a cylinder using a power source. Gas compression is achieved by utilizing the volume change of the sealed space formed by the piston and cylinder. It features a wide pressure range and high efficiency, and plays an important role in medium- and high-pressure natural gas boosting applications. However, existing pneumatic piston rods often have sealing rings installed, but these rings are prone to wear and leakage after long-term use, affecting the natural gas boosting effect. Utility Model Content

[0003] To address the above shortcomings, this utility model proposes a pneumatic natural gas booster device. It uses compressed air to drive the piston rod to move, and utilizes the cooperation of the first and second sealing rings to improve the sealing effect of the piston rod, which is beneficial to improving the boosting effect of natural gas.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A pneumatic natural gas booster device includes: a booster cylinder, the booster cylinder having a cylindrical cavity, a piston rod movably disposed inside the cavity, the piston rod dividing the cavity into a first chamber and a second chamber, the first chamber being connected to a first gas tank via a first pipeline, the first gas tank being used to deliver compressed air, the second chamber being connected to a second gas tank via a second pipeline, the second gas tank being used to deliver natural gas, and the second chamber being connected to a third gas tank via a third pipeline, both ends of the piston rod being sequentially fitted with an elastic element, a first sealing ring, and a second sealing ring, one end of the elastic element abutting against the first sealing ring, the first sealing ring having a snap-fit ​​portion, and the second sealing ring having a snap-fit ​​groove, the snap-fit ​​portion being inserted into the snap-fit ​​groove to drive the second sealing ring in the corresponding area to adhere to the inner wall of the booster cylinder.

[0006] Furthermore, the snap-fit ​​portion includes a frustum portion and an annular portion connected to each other, and the snap-fit ​​groove includes a frustum hole and an annular groove that are connected to each other. The larger end of the frustum hole faces the annular portion, and the annular portion is inserted into the annular groove. The frustum portion is used to drive the second sealing ring in the corresponding area to deform.

[0007] Furthermore, a first limiting plate and a second limiting plate are provided parallel to each end of the piston rod. The first limiting plate is detachably disposed at the end of the piston rod, and the second limiting plate is fixedly disposed at the piston rod. The elastic element is connected to the first limiting plate, one side of the second sealing ring abuts against the second limiting plate, and the first sealing ring is movably disposed between the elastic element and the second sealing ring.

[0008] Furthermore, the piston rod has a boss at its end, and the outer peripheral wall of the boss has an external thread. The first limiting plate has a groove, and the inner wall of the groove has an internal thread that engages with the external thread.

[0009] Furthermore, the elastic element is a spring connected to the first limiting plate, the piston rod is provided with an annular protrusion, and the second sealing ring is provided with an annular groove that cooperates with the annular protrusion.

[0010] Furthermore, the first pipeline, the second pipeline, and the third pipeline are all equipped with switching valves, the first pipeline is equipped with a switching valve, and the switching valve and the switching valve are electrically connected to a controller.

[0011] Furthermore, a pressure gauge is provided between the switching valve and the switching valve, the first pipeline is connected to a pressure relief valve through a branch pipe, one end of the pressure relief valve is connected to the first gas tank, and the pressure gauge and the pressure relief valve are electrically connected to the controller.

[0012] Furthermore, both the second pipeline and the third pipeline are equipped with one-way valves to restrict gas backflow.

[0013] Compared with existing technologies, this utility model has at least the following beneficial effects:

[0014] 1. In this invention, compressed air drives the piston rod to move, thereby making the process of compressing natural gas clean and pollution-free.

[0015] 2. In this utility model, by setting a first sealing ring and a second sealing ring, and by having the elastic element drive the snap-fit ​​part to be inserted into the slot, it is beneficial to drive the second sealing ring in the corresponding area to fit tightly against the inner wall of the booster cylinder, thereby avoiding wear of the second sealing ring and the presence of gaps at the seal, which helps to prevent mutual leakage between natural gas and compressed air, and ultimately improves the sealing of the piston rod to improve the boosting effect of natural gas. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1This is a schematic diagram of the structure of one embodiment of a pneumatic natural gas booster device according to the present invention;

[0018] Figure 2 for Figure 1 A partial structural diagram of the piston rod;

[0019] Figure 3 for Figure 2 Internal sectional view.

[0020] In the diagram: booster cylinder 100, first chamber 101, second chamber 102, piston rod 110, first limiting plate 111, second limiting plate 112, boss 113, annular protrusion 114, elastic element 120, first sealing ring 130, frustum portion 131, annular portion 132, second sealing ring 140, annular groove 141, first pipeline 200, first air tank 210, second pipeline 300, second air tank 310, third pipeline 400, third air tank 410, switch valve 500, switching valve 510, pressure gauge 520, pressure relief valve 530, check valve 540. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0022] In the description of this utility model, it should be noted that the terms "inner", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] See Figures 1 to 3 A pneumatic natural gas booster device includes: a booster cylinder 100, which has a cylindrical cavity. A piston rod 110 is movably disposed inside the cavity, dividing the cavity into a first cavity 101 and a second cavity 102. The first cavity 101 is connected to a first gas tank 210 via a first pipeline 200, and the first gas tank 210 is used to deliver compressed air. The second cavity 102 is connected to a second gas tank 310 via a second pipeline 300. 310 is used to transport natural gas. The second cavity 102 is connected to the third gas tank 410 through the third pipeline 400. Both ends of the piston rod 110 are sequentially fitted with an elastic element 120, a first sealing ring 130 and a second sealing ring 140. One end of the elastic element 120 abuts against the first sealing ring 130. The first sealing ring 130 is provided with a snap-fit ​​part, and the second sealing ring 140 is provided with a snap-fit ​​groove. The snap-fit ​​part is inserted into the snap-fit ​​groove to drive the second sealing ring 140 in the corresponding area to fit against the inner wall of the booster cylinder 100.

[0026] The pneumatic natural gas booster device with the above structure first delivers low-pressure natural gas to the second chamber 102, and then delivers it to the first chamber 101 via compressed air. The pressure difference drives the piston rod 110 to move towards one side of the second chamber 102, which helps reduce the volume of the second chamber 102 to achieve natural gas compression and boosting. Finally, the first chamber 101 is filled or vented with compressed air, thus continuously outputting high-pressure natural gas. This device is clean, pollution-free, and easy to control. During the movement of the piston rod 110, the elastic element 120 drives the locking part to insert into the locking groove, which helps to ensure that the second sealing ring 140 in the corresponding area is tightly fitted against the inner wall of the booster cylinder 100. This prevents wear of the second sealing ring 140 and the resulting gaps at the seal, effectively preventing leakage between natural gas and compressed air.

[0027] See Figures 1 to 3Furthermore, the engaging portion includes a frustum portion 131 and an annular portion 132 connected to each other, and the engaging groove includes a frustum hole and an annular groove 141 connected to each other. The larger end of the frustum hole faces the annular portion 132, and the annular portion 132 is inserted into the annular groove 141. The frustum portion 131 is used to drive the second sealing ring 140 in the corresponding area to deform. Specifically, in use, the smaller end of the frustum portion 131 faces the annular portion 132, and the elastic member 120 drives the frustum portion 131 to move towards the side of the annular portion 132. This facilitates the higher side of the frustum portion 131 to drive the second sealing ring 140 to expand outward, thereby enabling the second sealing ring 140 to compensate for wear on its outer side. Ultimately, this ensures that the second sealing ring 140 remains tightly attached to the inner wall of the booster cylinder 100, which helps to improve the sealing performance between the piston rod 110 and the booster cylinder 100.

[0028] See Figures 1 to 3 Furthermore, a first limiting plate 111 and a second limiting plate 112 are provided parallel to each other at both ends of the piston rod 110. The first limiting plate 111 is detachably provided at the end of the piston rod 110, and the second limiting plate 112 is fixedly provided at the piston rod 110. The elastic element 120 is connected to the first limiting plate 111, one side of the second sealing ring 140 abuts against the second limiting plate 112, and the first sealing ring 130 is movably provided between the elastic element 120 and the second sealing ring 140, thereby installing the first sealing ring 130, the second sealing ring 140 and the elastic element 120 on the piston rod 110.

[0029] See Figures 1 to 3 Furthermore, the piston rod 110 has a boss 113 at its end, the outer peripheral wall of the boss 113 has an external thread, the first limiting plate 111 has a groove, the inner wall of the groove has an internal thread, the internal thread and the external thread cooperate, so that the first limiting plate 111 can be detachably installed on the piston rod 110, which is conducive to removing the first limiting plate 111 to install or remove other parts.

[0030] See Figures 1 to 3Furthermore, the elastic element 120 is a spring connected to the first limiting plate 111, the piston rod 110 is provided with an annular protrusion 114, and the second sealing ring 140 is provided with an annular groove that mates with the annular protrusion 114. Specifically, during installation, the second sealing ring 140 is first fitted onto the piston rod 110, so that the annular groove engages with the annular protrusion 114, thereby fixing the position of the second sealing ring 140. Then, the first sealing ring 130 is fitted onto the piston rod 110, so that the engaging part of the second sealing ring 140 is inserted into the slot of the first sealing ring 130. Finally, the spring is fitted onto the piston rod 110, and the first limiting plate 111 is threaded onto the boss 113, thereby enabling the first elastic element 120 to generate an elastic force that drives the first sealing ring 130 to move. It can be understood that one end of the spring is fixed to the first limiting plate 111, and the spring is in a compressed state during use.

[0031] See Figure 1 Furthermore, the first pipeline 200, the second pipeline 300, and the third pipeline 400 are all equipped with a switch valve 500, and the first pipeline 200 is equipped with a switching valve 510. The switch valves 500 and the switching valves 510 are electrically connected to a controller. Specifically, when the second chamber 102 needs to be filled with natural gas, the switch valves 500 of the first pipeline 200 and the third pipeline 400 are closed, while the switch valve 500 of the second pipeline 300 is opened, allowing the low-pressure natural gas from the second gas tank 310 to be delivered into the second chamber 102 until the natural gas in the second chamber 102 reaches a certain volume, at which point the switch valve 500 of the second pipeline 300 is closed. When pressurized natural gas is required, the switching valves 500 of the second pipeline 300 and the third pipeline 400 are closed, and then the switching valve 500 of the first pipeline 200 is opened, allowing compressed air from the first gas tank 210 to be delivered into the first chamber 101. This causes the piston rod 110 to move towards the second chamber 102 under the influence of the pressure difference, thereby compressing and pressurizing the natural gas in the second chamber 102. A switching valve 510 is used to switch the direction of compressed air delivery, thus enabling the venting and filling operations of the first chamber 101. Switching valves 500 are installed on the first pipeline 200, the second pipeline 300, and the third pipeline 400 to control the flow of gas from different pipelines.

[0032] See Figure 1 Furthermore, a pressure gauge 520 is provided between the switching valve 500 and the switching valve 510. The first pipeline 200 is connected to a pressure relief valve 530 through a branch pipe. One end of the pressure relief valve 530 is connected to the first gas tank 210. The pressure gauge 520 and the pressure relief valve 530 are electrically connected to the controller, so that the pressure gauge 520 can detect the gas pressure of the first pipeline 200, and the controller can use the pressure relief valve 530 to release some gas, so as to avoid the gas pressure of the first pipeline 200 being too high.

[0033] See Figure 1 Furthermore, both the second pipeline 300 and the third pipeline 400 are equipped with one-way valves 540 to restrict gas backflow, thereby avoiding confusion between the gas inlet and outlet directions.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pneumatic natural gas booster device, characterized in that, include: A booster cylinder (100) is provided with a cylindrical cavity. A piston rod (110) is movably disposed inside the cavity. The piston rod (110) is used to divide the cavity into a first cavity (101) and a second cavity (102). The first cavity (101) is connected to a first gas tank (210) through a first pipeline (200). The first gas tank (210) is used to transport compressed air. The second cavity (102) is connected to a second gas tank (310) through a second pipeline (300). The second gas tank (310) is used to transport natural gas. The second cavity (102) is connected to a third gas tank (410) through a third pipeline (400). Both ends of the piston rod (110) are fitted with an elastic element (120), a first sealing ring (130) and a second sealing ring (140) in sequence. One end of the elastic element (120) abuts against the first sealing ring (130). The first sealing ring (130) is provided with a snap-fit ​​part, and the second sealing ring (140) is provided with a slot. The snap-fit ​​part is inserted into the slot to drive the second sealing ring (140) in the corresponding area to fit against the inner wall of the booster cylinder (100).

2. The pneumatic natural gas booster device according to claim 1, characterized in that, The snap-fit ​​portion includes a frustum portion (131) and an annular portion (132) connected to each other. The snap-fit ​​groove includes a frustum hole and an annular groove (141) connected to each other. The larger end of the frustum hole faces the annular portion (132). The annular portion (132) is inserted into the annular groove (141). The frustum portion (131) is used to drive the second sealing ring (140) in the corresponding area to deform.

3. A pneumatic natural gas booster device according to claim 2, characterized in that, The piston rod (110) has a first limiting plate (111) and a second limiting plate (112) arranged parallel to each other at both ends. The first limiting plate (111) is detachably disposed at the end of the piston rod (110), and the second limiting plate (112) is fixedly disposed at the piston rod (110). The elastic element (120) is connected to the first limiting plate (111), one side of the second sealing ring (140) abuts against the second limiting plate (112), and the first sealing ring (130) is movably disposed between the elastic element (120) and the second sealing ring (140).

4. A pneumatic natural gas booster device according to claim 3, characterized in that, The piston rod (110) has a boss (113) at its end. The outer peripheral wall of the boss (113) is provided with an external thread. The first limiting plate (111) is provided with a groove. The inner wall of the groove is provided with an internal thread. The internal thread cooperates with the external thread.

5. A pneumatic natural gas booster device according to claim 3, characterized in that, The elastic element (120) is a spring connected to the first limiting plate (111), the piston rod (110) is provided with an annular protrusion (114), and the second sealing ring (140) is provided with an annular groove that cooperates with the annular protrusion (114).

6. A pneumatic natural gas booster device according to claim 1, characterized in that, The first pipeline (200), the second pipeline (300) and the third pipeline (400) are all equipped with a switch valve (500), and the first pipeline (200) is equipped with a switching valve (510). The switch valve (500) and the switching valve (510) are electrically connected to a controller.

7. A pneumatic natural gas booster device according to claim 6, characterized in that, A pressure gauge (520) is provided between the switching valve (500) and the switching valve (510). The first pipeline (200) is connected to a pressure relief valve (530) through a branch pipe. One end of the pressure relief valve (530) is connected to the first gas tank (210). The pressure gauge (520) and the pressure relief valve (530) are electrically connected to the controller.

8. A pneumatic natural gas booster device according to claim 6, characterized in that, Both the second pipeline (300) and the third pipeline (400) are equipped with one-way valves (540) for limiting gas backflow.

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