Low-temperature high-pressure pump outlet liquid buffer device

Abstract

The utility model relates to low temperature high pressure pump technical field especially relates to a low temperature high pressure pump liquid outlet buffer device, including base, still including the liquid inlet subassembly, buffer subassembly, liquid outlet subassembly that are connected in proper order through pipeline and are established at the base, buffer subassembly is used for buffering the liquid pressure of liquid inlet subassembly output, and through liquid outlet subassembly, liquid is discharged, wherein, buffer subassembly includes support no.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic high-pressure pump technology, and in particular to a cryogenic high-pressure pump outlet buffer device. Background Technology

[0002] Cryogenic reciprocating pump dampers typically employ a straight-tube cylindrical structure with a vertical arrangement. After the internal liquid vaporizes, the gas is located at the top, acting as an air bladder to balance the pulsating pressure of the liquid entering the interior, thereby reducing the impact of pump outlet pulsations on the pipeline.

[0003] This type of damper has a small heat absorption area. Under ultra-high pressure (≥50MPa), the upper gas position is prone to heating and bulging due to the high pressure pulse impact, posing a safety risk. It requires high strength of the circular tube, has a large wall thickness, and is difficult to manufacture. It has a weak ability to suppress pulses, and the remaining pressure pulse is still large, affecting the normal configuration and use of safety valves and pressure sensors. Generally, pressure sensors and safety valves are not installed at the upper part, resulting in low overall reliability. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a low-temperature high-pressure pump outlet buffer device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cryogenic high-pressure pump discharge buffer device is designed, including a base, and an inlet assembly, a buffer assembly, and an outlet assembly disposed on the base and connected in sequence by pipelines. The buffer assembly is used to buffer the liquid pressure output by the inlet assembly and discharge the liquid through the outlet assembly. The buffer assembly includes a support, a fixing part for fixing multiple coil dampers on the support, a high-pressure elbow disposed at the end of the coil damper, and a connecting pipe connecting the upper and lower adjacent high-pressure elbows.

[0007] Furthermore, the fixing part includes a positioning block fixed to the bracket by bolts and a through hole through the positioning block for the coil damper to pass through.

[0008] Furthermore, one side of the bracket is provided with bracket two and bracket three. The bracket two is provided with a three-way valve one, and the bracket three is provided with a safety valve. The inlet of the three-way valve one is connected to the outlet of the coil damper. One outlet of the three-way valve one is connected to the inlet of the safety valve through the connecting pipeline, and the other outlet of the three-way valve one is connected to a pressure sensor.

[0009] Furthermore, the outlet of the safety valve is connected to the inlet of the three-way valve two through the pipeline, one outlet of the three-way valve two is connected to the vent pipe joint, and the other outlet of the three-way valve two is connected to the inlet of the venting air valve.

[0010] Furthermore, the liquid discharge assembly includes a three-way valve, a liquid discharge pneumatic valve, a liquid discharge check valve, and a liquid discharge adapter connected in sequence through the pipeline. The inlet of the three-way valve is connected to the outlet of the venting pneumatic valve through the pipeline.

[0011] Furthermore, the liquid inlet assembly includes a liquid inlet check valve and a three-way valve four connected through the pipeline, and the outlet of the three-way valve four is connected to the inlet of the coil damper.

[0012] The low-temperature high-pressure pump outlet buffer device proposed in this utility model has the following advantages:

[0013] This invention solves the problem of suppressing the pressure pulse at the outlet of a low-temperature high-pressure pump by setting up a buffer component. It adopts a coil damper to increase the heat absorption area, increase the internal gas phase space, and increase the pulse suppression capability, reducing the outlet pressure pulse to a reasonable value. After adopting the coil damper, the pipe diameter is reduced, and adjacent coil dampers are connected by a high-pressure elbow and connecting pipe, which is safe and reliable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a top view of the present invention; Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Example, refer to Figure 1-2 A low-temperature high-pressure pump liquid outlet buffer device includes a base 1, and also includes an inlet assembly 2, a buffer assembly 3, and an outlet assembly 4, which are disposed on the base 1 and connected in sequence through a pipeline 5. The buffer assembly 3 is used to buffer the liquid pressure output by the inlet assembly 2 and discharge the liquid through the outlet assembly 4. The buffer assembly 3 includes a support 301, a fixing part 302 that fixes multiple coil dampers 303 on the support 301, a high-pressure elbow 304 disposed at the end of the coil damper 303, and a connecting pipe 305 connecting the upper and lower adjacent high-pressure elbows 304. The spiral coil structure increases the length of the liquid flow channel and the heat absorption area, promotes partial vaporization of the liquid to form a gas phase space, and uses the compressibility of gas to absorb pressure fluctuations.

[0018] This invention solves the problem of suppressing the pressure pulse at the outlet of a low-temperature high-pressure pump by setting a buffer component 3. It adopts a coil damper 303 to increase the heat absorption area, increase the internal gas phase space, and increase the pulse suppression capability, reducing the outlet pressure pulse to a reasonable value. After adopting the coil damper 303, the pipe diameter is reduced. Adjacent coil dampers 303 are connected by a high-pressure elbow 304 and a connecting pipe 305, which is safe and reliable.

[0019] In an optional embodiment of this utility model, the fixing part 302 includes a positioning block 3022 fixed to the bracket 301 by bolts 3021, and a through hole 3023 through the positioning block 3022 for the coil damper 303 to pass through. Preferably, in this embodiment, there are at least two fixing parts 302 on each bracket 301 corresponding to each coil damper 303. The through hole 3023 of the positioning block 3022 can accurately constrain the position of the coil, and the bolts 3021 provide rigid support. The coil damper 303 is fixed together by the bracket 301 and the fixing part 302. The number of coil dampers 303 can be increased or decreased according to the size of the liquid flow. They are connected by a high-pressure elbow 304 and a connecting pipe 305 to adapt to different pressure suppression requirements.

[0020] In an optional embodiment of this utility model, a second bracket 6 and a third bracket 7 are provided on one side of the first bracket 301. A three-way valve 8 is provided on the second bracket 6, and a safety valve 9 is provided on the third bracket 7. The inlet of the three-way valve 8 is connected to the outlet of the coil damper 303. One outlet of the three-way valve 8 is connected to the inlet of the safety valve 9 through the connecting pipe 5. The other outlet of the three-way valve 8 is connected to the pressure sensor 10. By setting the pressure sensor 10, pressure interlock protection can be set on the electrical control to prevent continued operation after overpressure. At the same time, the safety valve 9 also plays a protective role, further ensuring the safe operation of the unit.

[0021] In an optional embodiment of this utility model, the outlet of safety valve 9 is connected to the inlet of three-way valve 2 11 via pipeline 5. One outlet of three-way valve 2 11 is connected to vent pipe joint 12, and the other outlet of three-way valve 2 11 is connected to the inlet of venting pneumatic valve 13. Preferably, the venting pneumatic valve 13 in this embodiment is controlled by dry gas, has no explosion-proof requirements, and is safe and reliable.

[0022] In an optional embodiment of this utility model, the liquid discharge assembly 4 includes a three-way valve 401, a liquid discharge pneumatic valve 402, a liquid discharge check valve 403, and a liquid discharge adapter 404 connected in sequence via a pipeline 5. The inlet of the three-way valve 401 is connected to the outlet of the venting pneumatic valve 13 via the pipeline 5. Preferably, the liquid discharge pneumatic valve 402 in this embodiment is controlled by dry gas, has no explosion-proof requirements, and is safe and reliable. The liquid discharge check valve 403 is installed after the liquid discharge pneumatic valve 402. On the one hand, it can avoid the impact of the liquid discharge pressure on the valve when the pump stops. At the same time, when the liquid discharge pneumatic valve 402 is closed, the liquid in the liquid discharge pneumatic valve 402 and the liquid discharge check valve 403 vaporizes and can automatically open when the pressure rises, avoiding the pressure between the two valves having nowhere to be released, which would bring safety risks.

[0023] In an optional embodiment of this utility model, the liquid inlet assembly 2 includes a liquid inlet check valve 201 and a three-way valve 202 connected by a pipeline 5. The outlet of the three-way valve 202 is connected to the inlet of the coil damper 303. The liquid inlet check valve 201 can prevent high-pressure liquid or gas in the assembly from returning to the pump chamber, and at the same time improves the service life of the liquid outlet valve in the pump.

[0024] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "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 based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the technical solution of this patent 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, and therefore should not be construed as a limitation on this patent application.

[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 patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this specification, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0027] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A cryogenic high-pressure pump outlet buffer device, comprising a base (1), characterized in that: It also includes an inlet assembly (2), a buffer assembly (3), and an outlet assembly (4) that are installed on the base (1) and connected in sequence through a pipeline (5). The buffer assembly (3) is used to buffer the liquid pressure output by the inlet assembly (2) and discharge the liquid through the outlet assembly (4). The buffer assembly (3) includes a support (301), a fixing part (302) that fixes multiple coil dampers (303) on the support (301), a high-pressure elbow (304) at the end of the coil damper (303), and a connecting pipe (305) that connects the upper and lower adjacent high-pressure elbows (304).

2. The cryogenic high-pressure pump outlet buffer device according to claim 1, characterized in that: The fixing part (302) includes a positioning block (3022) fixed to the bracket (301) by bolts (3021) and a through hole (3023) through the positioning block (3022) for the coil damper (303) to pass through.

3. The cryogenic high-pressure pump outlet buffer device according to claim 1, characterized in that: One side of the bracket 1 (301) is provided with bracket 2 (6) and bracket 3 (7). The bracket 2 (6) is provided with three-way valve 1 (8) and the bracket 3 (7) is provided with safety valve (9). The inlet of the three-way valve 1 (8) is connected to the outlet of the coil damper (303). One outlet of the three-way valve 1 (8) is connected to the inlet of the safety valve (9) through the connecting pipe (5). The other outlet of the three-way valve 1 (8) is connected to the pressure sensor (10).

4. The cryogenic high-pressure pump outlet buffer device according to claim 3, characterized in that: The outlet of the safety valve (9) is connected to the inlet of the three-way valve (11) through the pipeline (5). One outlet of the three-way valve (11) is connected to the vent pipe joint (12), and the other outlet of the three-way valve (11) is connected to the inlet of the vent valve (13).

5. The cryogenic high-pressure pump outlet buffer device according to claim 4, characterized in that: The liquid discharge assembly (4) includes a three-way valve (401), a liquid discharge pneumatic valve (402), a liquid discharge check valve (403), and a liquid discharge adapter (404) connected in sequence through the pipeline (5). The inlet of the three-way valve (401) is connected to the outlet of the venting pneumatic valve (13) through the pipeline (5).

6. The cryogenic high-pressure pump outlet buffer device according to claim 1, characterized in that: The liquid inlet assembly (2) includes a liquid inlet check valve (201) and a three-way valve (202) connected through the pipeline (5), with the outlet of the three-way valve (202) connected to the inlet of the coil damper (303).

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