Combined buffer tank based on ultrahigh-pressure hydrogen compressor and use method of combined buffer tank

Abstract

The invention relates to the technical field of buffer tanks, in particular to a combined buffer tank based on an ultrahigh-pressure hydrogen compressor and a using method thereof.The combined buffer tank comprises a buffer tank body, damping seats used for damping are installed on the two sides of the lower end of the buffer tank body, and a first-stage outlet is formed in one side of the buffer tank body; a second flange plate is fixedly welded to the end, away from the buffer tank body, of the first-stage outlet, the second flange plate is fixedly connected with the first flange plate through connecting screws, a connecting pipe is fixedly welded to one end of the first flange plate, and an anti-unscrewing unit is installed on the outer side of the connecting pipe; and the anti-unscrewing unit comprises a protective shell, the open end of the protective shell is fixedly connected with the positioning shell, and a buffer mechanism is installed in the protective shell. In the anti-unscrewing device, the rotating end of the connected connecting screw can be controlled, positioning is achieved through a plurality of hexagonal prisms, and the situation that in the equipment operation process, the rotating end of the connecting screw is damaged can be effectively prevented. And the problem that the connecting screws are loosened due to vibration is solved, the inspection frequency is reduced, and convenience is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of buffer tanks, and in particular to a combined buffer tank based on an ultra-high pressure hydrogen compressor and a method for using the same. Background Art

[0002] The combined buffer tank of the hydrogen compressor is an auxiliary equipment used in the hydrogen compression system. It is composed of multiple buffer tanks and is usually installed at the outlet or inlet of the compressor. Its main function is to reduce the pulsation and pressure fluctuations generated during the compression and transportation of hydrogen, thereby improving the stability and reliability of the system. The combined buffer tank, through the coordinated operation of multiple tanks, can effectively increase hydrogen storage capacity, balance hydrogen flow, and reduce the impact of pressure changes on compressors and downstream equipment. In addition, it can also help reduce noise levels in the system and improve the efficiency and safety of the entire hydrogen supply system. The elbow of the outlet buffer tank of the reforming hydrogen compressor has a serious vibration problem during operation. The maximum vibration speed of the buffer tank reaches 28.5 mm / s, and the maximum vibration displacement reaches 0.218 mm. Long-term strong vibration has caused serious damage to the outlet buffer tank and its ancillary structures. Among them, the first-level outlet buffer tank vibrates greatly, and the flange bolts of the outlet buffer tank often become loose, causing hydrogen leakage. After the on-site staff discovers it, they need to tighten the bolts immediately with a copper wrench, and have to check frequently, which is cumbersome. Therefore, in response to the above problems, a combined buffer tank based on an ultra-high pressure hydrogen compressor and a method for using the same are proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide a combined buffer tank based on an ultra-high pressure hydrogen compressor and a method for using the same, so as to solve the problem of the bent pipe of the outlet buffer tank of the reforming hydrogen compressor. During operation, the outlet buffer tank and its connecting pipe have a relatively serious vibration problem. The maximum vibration speed of the buffer tank reaches 28.5 mm / s, and the maximum vibration displacement reaches 0.218 mm. Long-term strong vibration has caused serious damage to the outlet buffer tank and its ancillary structures. Among them, the first-level outlet buffer tank vibrates greatly, and the flange bolts of the outlet buffer tank often become loose, causing hydrogen leakage. After the on-site staff discovers it, they need to immediately use a copper wrench to tighten the bolts, and have to conduct frequent inspections, which is a relatively cumbersome problem.

[0004] To achieve the above object, the present invention provides the following technical solutions: A combined buffer tank based on an ultra-high pressure hydrogen compressor and a method of using the same include a buffer tank body, wherein shock-absorbing seats for shock absorption are installed on both sides of the lower end of the buffer tank body, a first-level outlet is installed on one side of the buffer tank body, and a second flange plate is welded and fixed to the end of the first-level outlet away from the buffer tank body, the second flange plate is fixedly connected to the first flange plate by connecting screws, a connecting pipe is welded and fixed to one end of the first flange plate, and an anti-wire back-off unit is installed on the outside of the connecting pipe; the anti-wire back-off unit includes a protective shell, the open end of the protective shell is fixedly connected to the positioning shell, a buffer mechanism is installed inside the protective shell, a hexagonal prism is fixedly connected to one side of the buffer mechanism, and a connector is installed on the side of the positioning shell; the protective shell includes a hollow ring plate, an annular groove is provided inside the hollow ring plate, the positioning shell includes two positioning ring plates, a hexagonal hole is provided on the inner side of the positioning ring plate, one of the positioning ring plates has a card slot provided on the upper and lower ends, and the other positioning ring plate has a card block fixedly connected on the upper and lower ends, and the buffer mechanism includes a rubber plate, and a mounting hole is provided on the inner side of the rubber plate.

[0005] As a further optimization of the present invention, there are two shock-absorbing seats, which are horizontally distributed on both sides of the lower end of the buffer tank body, and the bottom ends of the shock-absorbing seats are fixedly connected to the cement base installed on the buffer tank through expansion bolts.

[0006] As a further optimization of the present invention, the first flange plate is provided with annularly equidistantly distributed through-holes on the inner side of the edge, the second flange plate is provided with annularly equidistantly distributed threaded holes on the inner side of the edge, the lateral projections of the first flange plate and the second flange plate are equal in size, and the connecting screws pass through the through-holes on the inner side of the first flange plate and are spirally connected to the threaded holes on the inner side of the second flange plate.

[0007] As a further optimized content of the present invention, the connector includes a fixed block, the outer side of the fixed block is rotatably connected to a connecting frame via a rotating shaft, and the end of the connecting frame away from the rotating shaft is fixedly connected to an anti-slip pad.

[0008] As a further optimization of the present invention, the fixing block is welded and fixed to the positioning ring plate, the connecting frame is L-shaped, and the connecting frame is connected to the second flange plate through an anti-slip pad provided at the top.

[0009] As a further optimization of the present invention, the hollow ring plate is provided with two sections, the hollow ring plate corresponds to the rubber plate one-to-one, the rubber plate is installed in the ring groove opened inside the hollow ring plate, and the rubber plate is fixedly connected to one end of the hexagonal prism through the mounting hole.

[0010] As a further optimized content of the present invention, wherein: the positioning ring plate is provided with two sections, the two sections of the positioning ring plate are connected by a clamping groove and a clamping block, and the vertical section of the clamping groove is L-shaped.

[0011] There are multiple hexagonal prisms, which correspond one to one with the hexagonal holes. The hexagonal prisms are slidably connected to the positioning ring plate through the hexagonal holes. The end of the hexagonal prism away from the rubber plate and the end of the positioning ring plate away from the hollow ring plate are arranged on the same vertical plane.

[0012] As a further optimization of the present invention, there are multiple hexagonal prisms, the edge of one end of the hexagonal prism away from the rubber plate is arc-shaped, and the hexagonal prisms are distributed in a ring shape.

[0013] As a further optimized content of the present invention, the following steps are included: Step I: connecting the buffer tank body and the connecting pipe: connecting the buffer tank body through the first-level outlet, the second flange plate, the first flange plate and the connecting pipe by connecting screws; During the connection process, a plurality of connecting screws pass through the second flange plate and are connected and positioned with the first flange plate. During the connection process, a sealing gasket is installed between the first flange plate and the second flange plate; Step II: Assembling the wire unwinding unit: Connect the two positioning ring plates through the card blocks and card slots to achieve positioning. During the connection process, the card blocks are inserted into the corresponding card slots. After the connection is completed, the protective shells are automatically docked. Step III: Positioning the wire unwinding unit: The wire unwinding unit is positioned by contacting the anti-slip pads provided on the inner sides of the multiple connectors with the end of the second flange plate close to the buffer tank body; During the positioning process of the wire release unit, the hexagonal prism is inserted into the position outside the connecting screw, thereby positioning the edge of the hexagonal part of the connecting screw; Step IV: Later maintenance of the interface: When the sealing gasket installed between the first flange plate and the second flange plate needs to be maintained or replaced later, the staff will disassemble the wire release unit through the provided connector, and then remove the connecting screws to separate the first flange plate and the second flange plate to achieve maintenance and replacement of the sealing gasket.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the rotating end of the connecting screw can be controlled by the provided wire-releasing unit, and positioning is achieved by multiple provided hexagonal prisms, which can effectively prevent the loosening of the connecting screw due to vibration during the operation of the equipment, thereby reducing the frequency of inspections and being more convenient. 2. In the present invention, the structure for positioning the connecting screws is convenient for assembly and disassembly during actual use, which can improve the convenience of maintaining and replacing the sealing gasket installed between the first flange plate and the second flange plate in the later stage; 3. In the present invention, the rubber plate can be positioned by setting up a protective shell, and then the hexagonal prism can be positioned. At the same time, the hexagonal prism exposed on the outside of the positioning shell can be sealed and protected. After the entire device is installed, it cooperates with the first flange plate to achieve sealing of the other end of the positioning shell, thereby ensuring the actual service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the wire unwinding unit of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of the structure at A in the middle; Figure 4 This is a schematic diagram of the installation position structure of the connecting screws of the present invention; Figure 5 This is a schematic diagram of the protective shell structure of the present invention; Figure 6 This is a schematic diagram of the positioning shell structure of the present invention; Figure 7 This is a schematic diagram of the connector structure of the present invention; Figure 8 It is a schematic structural diagram of the buffer mechanism of the present invention.

[0016] In the figure: 1. Shock absorber; 2. Buffer tank body; 3. Primary outlet; 4. Connecting pipe; 5. Anti-wire backlash unit; 51. Protective shell; 511. Hollow ring plate; 512. Ring groove; 52. Positioning shell; 521. Positioning ring plate; 522. Hexagonal hole; 523. Card slot; 524. Card block; 53. Connector; 531. Fixing block; 532. Rotating shaft; 533. Connecting frame; 534. Anti-slip pad; 54. Buffer mechanism; 541. Rubber plate; 542. Mounting hole; 55. Hexagonal prism; 6. Connecting screws; 7. First flange plate; 8. Second flange plate. DETAILED DESCRIPTION

[0017] See also Figure 1-8 , the present invention provides a technical solution: A combined buffer tank based on an ultra-high pressure hydrogen compressor and a method of using the same include a buffer tank body 2, with shock-absorbing seats 1 for shock absorption installed on both sides of the lower end of the buffer tank body 2, a first-level outlet 3 installed on one side of the buffer tank body 2, a second flange plate 8 welded and fixed to the end of the first-level outlet 3 away from the buffer tank body 2, the second flange plate 8 is fixedly connected to the first flange plate 7 by connecting screws 6, a connecting pipe 4 is welded and fixed to one end of the first flange plate 7, an anti-thread-backward unit 5 is installed on the outside of the connecting pipe 4; the anti-thread-backward unit 5 includes a protective shell 51, the open end of the protective shell 51 is fixedly connected to the positioning shell 52, and the protective shell 51 is fixedly provided with a plurality of protective shells. A buffer mechanism 54 is installed on the top, and a hexagonal prism 55 is fixedly connected to one side of the buffer mechanism 54, and a connector 53 is installed on the side of the positioning shell 52; the protective shell 51 includes a hollow ring plate 511, and a ring groove 512 is opened inside the hollow ring plate 511; the positioning shell 52 includes two positioning ring plates 521, and a hexagonal hole 522 is opened on the inner side of the positioning ring plate 521, one of the positioning ring plates 521 has a card groove 523 on the upper and lower ends, and the other positioning ring plate 521 has a card block 524 fixedly connected to the upper and lower ends. The buffer mechanism 54 includes a rubber plate 541, and a mounting hole 542 is opened on the inner side of the rubber plate 541.

[0018] As a further technical solution for implementing this solution, two shock-absorbing seats 1 are provided. The shock-absorbing seats 1 are horizontally distributed on both sides of the lower end of the buffer tank body 2. The bottom ends of the shock-absorbing seats 1 are fixedly connected to the cement base installed on the buffer tank by expansion bolts. Through the above arrangement, the shock-absorbing effect of the buffer tank during actual use can be further improved. As a further technical solution for implementing this solution, the inner edge of the first flange plate 7 is provided with an annularly equidistantly distributed through-holes, and the inner edge of the second flange plate 8 is provided with an annularly equidistantly distributed threaded holes. The lateral projections of the first flange plate 7 and the second flange plate 8 are equal in size. The connecting screws 6 pass through the through-holes provided on the inner side of the first flange plate 7 and are screwed together with the threaded holes provided on the inner side of the second flange plate 8. With this arrangement, the primary outlet 3 and the connecting pipe 4 can be stably connected during actual use. As a further technical solution of this solution, the connector 53 includes a fixed block 531, the outer side of the fixed block 531 is rotatably connected to a connecting frame 533 via a rotating shaft 532, and the end of the connecting frame 533 away from the rotating shaft 532 is fixedly connected to an anti-slip pad 534. Through the above arrangement, the anti-wire backlash unit 5 can be connected to the second flange plate 8; As a further technical solution implemented in this solution, the fixing block 531 is welded to the positioning ring plate 521, and the connecting frame 533 is L-shaped. The connecting frame 533 is connected to the second flange plate 8 through the anti-slip pad 534 provided on the top. Through the above arrangement, the stability of the wire unwinding unit 5 after installation can be further improved. As a further technical solution for implementing this solution, the hollow ring plate 511 is provided with two sections, and the hollow ring plate 511 corresponds to the rubber plate 541 in a one-to-one manner. The rubber plate 541 is installed in the annular groove 512 provided inside the hollow ring plate 511. The rubber plate 541 is fixedly connected to one end of the hexagonal prism 55 through the mounting hole 542. With the above arrangement, the hexagonal prism 55 can be stably limited and fixed. As a further technical solution implemented in this solution, the positioning ring plate 521 is provided with two sections, and the two sections of the positioning ring plates 521 are connected by a clamping groove 523 and a clamping block 524. The vertical cross-section of the clamping groove 523 is L-shaped. Through the above arrangement, the stability of the connection between the two positioning ring plates 521 can be improved; As a further technical solution for implementing this solution, a plurality of hexagonal prisms 55 are provided, and the hexagonal prisms 55 correspond one to one with the hexagonal holes 522. The hexagonal prisms 55 are slidably connected to the positioning ring plate 521 through the hexagonal holes 522. The end of the hexagonal prism 55 away from the rubber plate 541 and the end of the positioning ring plate 521 away from the hollow ring plate 511 are arranged on the same vertical plane. Through the above arrangement, the stability of the hexagonal prisms 55 during movement can be effectively improved. As a further technical solution for implementing this solution, a plurality of hexagonal prisms 55 are provided. The edge of one end of the hexagonal prism 55 away from the rubber plate 541 is arc-shaped, and the hexagonal prisms 55 are distributed in a ring shape. Through the above arrangement, the connecting screws 6 can be stably limited, which can prevent the problem of loosening of the connecting screws due to vibration. As a further technical solution for implementing this solution, the following steps are included: Step I: Connecting the buffer tank body 2 and the connecting pipe 4: Connect the buffer tank body 2 through the primary outlet 3, the second flange plate 8, the first flange plate 7 and the connecting pipe 4 by connecting screws 6; During the connection process, a plurality of connecting screws 6 pass through the second flange plate 8 and are connected and positioned with the first flange plate 7. During the connection process, a sealing gasket is installed between the first flange plate 7 and the second flange plate 8; Step II: Assembling the wire unwinding unit 5: Connect the two positioning ring plates 521 with the clamping block 524 and the clamping slot 523 to achieve positioning. During the connection process, the clamping block 524 is inserted into the corresponding clamping slot 523. After the connection is completed, the protective shell 51 is automatically docked. Step III: Positioning the wire unwinding unit 5: The anti-slip pads 534 provided on the inner sides of the multiple connectors 53 are brought into contact with the end of the second flange plate 8 close to the buffer tank body 2 to achieve positioning of the wire unwinding unit 5; During the positioning of the wire unwinding unit 5, the hexagonal prism 55 is inserted into the position outside the connecting screw 6, thereby positioning the edge of the hexagonal portion of the connecting screw 6; Step IV: Later maintenance of the interface: When the sealing gasket installed between the first flange plate 7 and the second flange plate 8 needs to be maintained or replaced in the later stage, the staff will disassemble the wire release unit 5 through the provided connector 53, and then remove the connecting screws 6 to separate the first flange plate 7 and the second flange plate 8 to achieve maintenance and replacement of the sealing gasket.

[0019] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method of the present invention and its core ideas. The above is only a preferred implementation method of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the scope of protection of the present invention.

Claims

1. A combined buffer tank based on an ultra-high pressure hydrogen compressor, comprising a buffer tank body (2), characterized in that: Shock-absorbing seats (1) for shock absorption are installed on both sides of the lower end of the buffer tank body (2), a first-level outlet (3) is installed on one side of the buffer tank body (2), a second flange plate (8) is welded and fixed to the end of the first-level outlet (3) away from the buffer tank body (2), the second flange plate (8) is fixedly connected to the first flange plate (7) by connecting screws (6), a connecting pipe (4) is welded and fixed to one end of the first flange plate (7), and a wire-retraction prevention unit (5) is installed on the outside of the connecting pipe (4); The anti-wire-retraction unit (5) comprises a protective shell (51), an open end of the protective shell (51) is fixedly connected to a positioning shell (52), a buffer mechanism (54) is installed inside the protective shell (51), a hexagonal prism (55) is fixedly connected to one side of the buffer mechanism (54), and a connector (53) is installed on the side of the positioning shell (52); The protective shell (51) includes a hollow ring plate (511), an annular groove (512) is provided inside the hollow ring plate (511), the positioning shell (52) includes two positioning ring plates (521), hexagonal holes (522) are provided inside the positioning ring plates (521), a clamping groove (523) is provided at the upper and lower ends of one of the positioning ring plates (521), and a clamping block (524) is fixedly connected at the upper and lower ends of the other positioning ring plate (521), the buffer mechanism (54) includes a rubber plate (541), and a mounting hole (542) is provided inside the rubber plate (541).

2. The combined buffer tank based on the ultra-high pressure hydrogen compressor according to claim 1 is characterized in that: Two shock-absorbing seats (1) are provided. The shock-absorbing seats (1) are horizontally distributed on both sides of the lower end of the buffer tank body (2). The bottom ends of the shock-absorbing seats (1) are fixedly connected to the cement base installed on the buffer tank through expansion bolts.

3. The combined buffer tank based on the ultra-high pressure hydrogen compressor according to claim 1 is characterized in that: The first flange plate (7) is provided with annular equidistantly distributed through holes on the inner side of the edge, and the second flange plate (8) is provided with annular equidistantly distributed threaded holes on the inner side of the edge. The transverse projections of the first flange plate (7) and the second flange plate (8) are equal in size. The connecting screws (6) pass through the through holes provided on the inner side of the first flange plate (7) and are screwedly connected to the threaded holes provided on the inner side of the second flange plate (8).

4. The combined buffer tank based on the ultra-high pressure hydrogen compressor according to claim 1 is characterized in that: The connector (53) comprises a fixed block (531), the outer side of the fixed block (531) being rotatably connected to a connecting frame (533) via a rotating shaft (532), and an end of the connecting frame (533) away from the rotating shaft (532) being fixedly connected to an anti-slip pad (534).

5. The combined buffer tank based on the ultra-high pressure hydrogen compressor according to claim 4 is characterized in that: The fixing block (531) is welded and fixed to the positioning ring plate (521). The connecting frame (533) is L-shaped. The connecting frame (533) is connected to the second flange plate (8) via an anti-slip pad (534) provided at the top.

6. The combined buffer tank based on the ultra-high pressure hydrogen compressor according to claim 1 is characterized in that: The hollow ring plate (511) is provided with two sections, and the hollow ring plate (511) corresponds to the rubber plate (541) on a one-to-one basis. The rubber plate (541) is installed inside the annular groove (512) provided inside the hollow ring plate (511). The rubber plate (541) is fixedly connected to one end of the hexagonal prism (55) through the mounting hole (542).

7. The combined buffer tank based on the ultra-high pressure hydrogen compressor according to claim 1 is characterized in that: The positioning ring plate (521) is provided with two sections, and the two sections of the positioning ring plate (521) are connected via a clamping groove (523) and a clamping block (524), and the vertical section of the clamping groove (523) is L-shaped.

8. The combined buffer tank based on the ultra-high pressure hydrogen compressor according to claim 1 is characterized in that: A plurality of hexagonal prisms (55) are provided, and the hexagonal prisms (55) correspond to the hexagonal holes (522) in a one-to-one manner. The hexagonal prisms (55) are slidably connected to the positioning ring plate (521) through the hexagonal holes (522). An end of the hexagonal prism (55) away from the rubber plate (541) and an end of the positioning ring plate (521) away from the hollow ring plate (511) are arranged on the same vertical plane.

9. The combined buffer tank based on the ultra-high pressure hydrogen compressor according to claim 1, characterized in that: A plurality of hexagonal prisms (55) are provided, and an edge of one end of the hexagonal prism (55) away from the rubber plate (541) is arc-shaped, and the hexagonal prisms (55) are distributed in a ring shape.

10. The method for using the combined buffer tank based on the ultra-high pressure hydrogen compressor according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step I: Connecting the buffer tank body (2) and the connecting pipe (4): Connect the buffer tank body (2) through the first-stage outlet (3), the second flange plate (8), the first flange plate (7) and the connecting pipe (4) using connecting screws (6); During the connection process, a plurality of connecting screws (6) pass through the second flange plate (8) and are connected and positioned with the first flange plate (7). During the connection process, a sealing gasket is installed between the first flange plate (7) and the second flange plate (8); Step II: Assembling the wire unwinding unit (5): connecting the two positioning ring plates (521) through the clamping block (524) and the clamping slot (523) to achieve positioning. During the connection process, the clamping block (524) is inserted into the corresponding clamping slot (523). After the connection is completed, the protective shell (51) automatically completes the docking; Step III: Positioning the wire unwinding unit (5): The anti-slip pads (534) provided on the inner sides of the plurality of connectors (53) are brought into contact with one end of the second flange plate (8) close to the buffer tank body (2), thereby achieving positioning of the wire unwinding unit (5); During the positioning of the wire-releasing unit (5), the hexagonal prism (55) is inserted into the position outside the connecting screw (6), thereby positioning the edge of the hexagonal portion of the connecting screw (6); Step IV: Later maintenance of the interface: When the sealing gasket installed between the first flange plate (7) and the second flange plate (8) needs to be maintained or replaced later, the staff will disassemble the wire release unit (5) through the provided connector (53), and then remove the connecting screws (6) to separate the first flange plate (7) and the second flange plate (8) to achieve maintenance and replacement of the sealing gasket.

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