CNG pressure reducing pry

Abstract

The utility model discloses a CNG pressure reducing crowbar, including pipeline one and pipeline two, pipeline one is equipped with sealing ring, and sealing ring is in contact with the outer wall of pipeline two, and the outer winding of sealing ring has annular compression band, and the installation of limit frame is on pipeline one, and the rotary installation of limit frame has rotary lever in, and annular compression band is wound on rotary lever after limit frame, and the inclined slot is equipped on rotary lever. Through the setting of annular compression band, thereby can be under the pressurization of counterweight pressure block to rotary lever, and annular compression band is tightened, thereby annular compression band can cause extrusion to sealing ring, make its edge even if wear, also can be extruded sealing, reduce the possibility of leakage when reducing pressure, through the cooperation setting of annular compression band and counterweight pressure block, make annular compression band slight wear, can be made up through annular compression band extrusion and do not have to dismount replacement, thereby reduced use cost, and counterweight pressure block avoids using the condition of spring etc. when driving rotary lever, and easy elastic fatigue and bad pressurization effect.

Description

Technical Field

[0001] This utility model relates to the field of CNG decompression skid technology, and in particular to a CNG decompression skid. Background Technology

[0002] To increase stability, when CNG tank trucks deliver bottled CNG to natural gas refueling stations, the CNG needs to be depressurized using a pressure reducing device to lower the pressure of the compressed natural gas to the required pressure before being transported into the natural gas pipeline network.

[0003] Existing technologies, such as CN210107063U, describe a CNG pressure relief skid that improves sealing performance through multi-layered Q-type and O-type cross-section sealing rings. However, its installation method is similar to that of ordinary sealing rings, and leakage is still prone to occur when corrosion or wear occurs at the sealing ring contact surface. Utility Model Content

[0004] Therefore, it is necessary to provide a CNG pressure relief skid to address the aforementioned technical problem of poor sealing performance of the CNG pressure relief skid.

[0005] To achieve the above objectives, this utility model provides a CNG pressure relief skid, including a first pipe and a second pipe. The first pipe is equipped with a sealing ring, which abuts against the outer wall of the second pipe. An annular pressure band is wrapped around the sealing ring. A limit frame is installed on the first pipe, and a rotating rod is rotatably installed inside the limit frame. The annular pressure band passes through the limit frame and wraps around the rotating rod. The rotating rod is provided with an inclined groove. A counterweight block is slidably engaged inside the limit frame, and the counterweight block abuts against the inclined groove.

[0006] Preferably, the sealing ring is provided with a lower pressure groove, and the annular pressure band is located in the lower pressure groove.

[0007] Preferably, a fixing plate is installed inside the limiting frame, the rotating rod is rotatably mounted on the fixing plate, a rotating ring is installed at the bottom of the rotating rod, and an annular pressure band is wound around the rotating ring.

[0008] Preferably, the limiting frame has rounded corners, and the annular pressure band abuts against the rounded corners.

[0009] Preferably, the limiting frame is provided with a slot, and the counterweight block is slidably engaged in the slot.

[0010] Preferably, a sealing cap is installed on the top of the limiting frame.

[0011] Compared with existing technologies, this technical solution has at least one of the following beneficial effects: 1. By setting the annular pressure band, the annular pressure band can be tightened under the pressure of the counterweight block on the rotating rod. The annular pressure band can squeeze the sealing ring, so that even if the edge is worn, it can be squeezed and sealed, reducing the possibility of leakage during pressure reduction. 2. By combining the annular pressure belt with the counterweight block, the slight wear of the annular pressure belt can be compensated by the pressure of the annular pressure belt without the need for disassembly and replacement, thereby reducing the cost of use. The counterweight block avoids the situation where the pressure is not effective due to elastic fatigue when using a crank spring or other drive rod. Attached Figure Description

[0012] Figure 1 This is a front sectional view of an embodiment of the present invention; Figure 2 This is a side sectional view of an embodiment of the present invention; Figure 3 This is an exploded view of the limiting frame according to an embodiment of the present invention; Figure 4 This is a perspective view of an embodiment of the present utility model; In the diagram, 1. Pipe 1; 2. Pipe 2; 3. Sealing ring; 4. Annular pressure band; 5. Limiting frame; 6. Rotating rod; 7. Inclined groove; 8. Counterweight block; 9. Lower pressure groove; 10. Fixing plate; 11. Rotating ring; 12. Slot; 13. Sealing cover. Detailed Implementation

[0013] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0014] Please see Figures 1 to 4 This application provides a CNG pressure relief skid, including a first pipe 1 and a second pipe 2. The first pipe 1 is equipped with a sealing ring 3, which abuts against the outer wall of the second pipe 2. An annular pressure band 4 is wrapped around the sealing ring 3. A limit frame 5 is fixedly installed on the first pipe 1. A rotating rod 6 is rotatably installed inside the limit frame 5. The annular pressure band 4 passes through the limit frame 5 and then wraps around the rotating rod 6. A slanted groove 7 is provided on the rotating rod 6. A counterweight block 8 is slidably engaged inside the limit frame 5. The counterweight block 8 abuts against the slanted groove 7. The slanted groove 7 is spirally arranged along the axial direction of the rotating rod 6, so that the rotating rod 6 can be squeezed and rotated.

[0015] In this embodiment, before fitting pipe 1 onto pipe 2, an annular pressure band 4 and a sealing ring 3 can be installed from inside pipe 1. During installation, the open ends of the annular pressure band 4 should first be inserted into the limiting frame 5. Then, the annular pressure band 4 and the sealing ring 3 should be inserted into the pre-set annular groove on pipe 1. Finally, the annular pressure band 4 should be wound around the rotating rod 6 to complete the preparation. After fitting pipe 1 onto pipe 2, the rotating rod 6 can be driven to rotate to a suitable position, so that the counterweight block 8 can be placed into the limiting frame 5 and abut against the inclined groove 7 on the rotating rod 6. The weight of the counterweight block 8 can be used to rotate the rotating rod 6 through the inclined groove 7 to straighten the annular pressure band 4. Then, a rotational pre-tightening force is applied to the rotating rod 6. Under the action of the pre-tightening force, the annular pressure band 4 can be continuously pulled to compress the sealing ring 3, so that the sealing ring 3 can better seal pipe 1 and pipe 2. Even if slight corrosion or wear occurs, the sealing ring 3 can still seal the pipe 1 and pipe 2. Meanwhile, the annular pressure band 4 can also compress the sealing ring 3, so that the worn and missing parts of the sealing ring 3 can still abut against the pipe 1 and the pipe 2 to perform sealing work; the annular pressure band 4 can be a static rope, aramid rope, etc. with strong toughness and not easy to break; the pipe 1 and the pipe 2 should also be equipped with connecting plates, limit bolts, etc. to maintain the stability of the connection between the two (not shown in the figure); the limit frame 5 can correct the annular pressure band 4 that has twisted to a certain extent when wrapped around the rotating rod 6, so that the part that fits against the sealing ring 3 can remain flat.

[0016] In some embodiments, to further improve the sealing effect, a pressure groove 9 is provided on the sealing ring 3, and an annular pressure band 4 is located in the pressure groove 9. The annular pressure band 4 can squeeze the sealing ring 3 towards the joint between the two pipes 1 and 2 through the trapezoidal pressure groove 9, thereby further preventing material leakage from this point when the pressure is reduced.

[0017] In some embodiments, to facilitate the installation of the rotating rod 6 and the annular pressure band 4, a fixing plate 10 is fixedly installed inside the limiting frame 5. The rotating rod 6 is rotatably mounted on the fixing plate 10, and a rotating ring 11 is installed at the bottom of the rotating rod 6. The annular pressure band 4 is wound around the rotating ring 11. The fixing plate 10 is a square plate with gaps between its two sides and the limiting frame 5, so that workers can reach down from both sides to wrap the annular pressure band 4 around the rotating ring 11.

[0018] In some embodiments, to reduce friction between the annular pressure band 4 and the limiting frame 5, the limiting frame 5 is provided with rounded corners, and the annular pressure band 4 abuts against the rounded corners. The distance between the limiting frame 5 and the sealing ring 3 is only the thickness of the annular pressure band 4, so that the sealing ring 3 at the limiting frame 5 can still achieve a good sealing effect through the compression of the annular pressure band 4 by the limiting frame 5, and the rounded corners on the limiting frame 5 reduce the wear of the annular pressure band 4 when it slides.

[0019] In some embodiments, in order to enable the counterweight block 8 to slide and engage within the limiting frame 5, a slot 12 is provided on the limiting frame 5, and the counterweight block 8 slides and engages within the slot 12.

[0020] In some embodiments, to prevent material leakage from the limiting frame 5, a sealing cap 13 is installed on the top of the limiting frame 5. After installation, the sealing cap 13 can be welded or otherwise used to completely seal the top of the limiting frame 5.

[0021] The fixed connection and rotating installation in the above embodiments can all be achieved by welding, screw fasteners and other forms in the prior art, and the rotating installation can be achieved by bearings, circular rotating blocks and circular grooves. All of the above components are standard parts, and those that are not standard parts can also be specially customized, so the inventor will not elaborate further.

[0022] 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.

[0023] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A CNG depressurization skid, comprising a first pipe (1) and a second pipe (2), characterized in that, The first pipe (1) is equipped with a sealing ring (3), which abuts against the outer wall of the second pipe (2). An annular pressure band (4) is wrapped around the sealing ring (3). A limit frame (5) is installed on the first pipe (1). A rotating rod (6) is rotatably installed inside the limit frame (5). The annular pressure band (4) is wrapped around the rotating rod (6) after passing through the limit frame (5). A slanted groove (7) is provided on the rotating rod (6). A counterweight block (8) is slidably engaged inside the limit frame (5). The counterweight block (8) abuts against the slanted groove (7).

2. The CNG depressurization skid according to claim 1, characterized in that, The sealing ring (3) is provided with a lower pressure groove (9), and the annular pressure band (4) is located in the lower pressure groove (9).

3. The CNG depressurization skid according to claim 1, characterized in that, A fixing plate (10) is installed inside the limiting frame (5), and a rotating rod (6) is rotatably installed on the fixing plate (10). A rotating ring (11) is installed at the bottom of the rotating rod (6), and an annular pressure band (4) is wound around the rotating ring (11).

4. The CNG depressurization skid according to claim 1, characterized in that, The limiting frame (5) has rounded corners, and the annular pressure strip (4) abuts against the rounded corners.

5. The CNG depressurization skid according to claim 1, characterized in that, The limiting frame (5) is provided with a slot (12), and the counterweight block (8) is slidably engaged in the slot (12).

6. The CNG depressurization skid according to claim 1, characterized in that, The top of the limiting frame (5) is sealed with a sealing cap (13).

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