Constant pressure shock absorbing booster pump

Abstract

This utility model discloses a constant pressure shock-absorbing booster pump, comprising: a booster pump and a constant pressure valve, wherein a buffer tube is detachably installed at the output end of the constant pressure valve; the buffer tube includes a spiral metal tube and connectors fixed at both ends; one end of the connector is connected to the gas outlet of the constant pressure valve, and the other end is adapted to the gas pipe of the gas stove; this utility model uses the buffer tube to buffer the shock generated by the fluid, and uses a spiral copper-nickel alloy metal tube instead of a traditional rubber hose, combined with a polytetrafluoroethylene anti-corrosion coating on the surface, which significantly improves the pressure resistance limit and corrosion resistance of the pipeline, and extends its service life; the spiral structure design utilizes a uniform bending radius to efficiently disperse the fluid pulsation stress generated by the booster pump, suppressing flame vibration; the connector and the gas outlet of the constant pressure valve are connected by a triangular sawtooth external thread for anti-loosening, and integrate a conical sealing surface and an O-ring for radial compression sealing, ensuring the detachability of the interface while preventing gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of gas transmission technology, and in particular to a constant pressure damping booster pump. Background Technology

[0002] In gas delivery systems, the combination of booster pumps and constant pressure valves is widely used in the gas supply path from LPG tanks to gas stoves. However, the periodic fluid pressure pulsations (typically 20-50Hz) generated by the booster pump can be transmitted to the gas stove through the pipeline, causing flame flickering, reduced combustion efficiency, and even posing a risk of flameout.

[0003] Currently, the industry mainly uses rubber hoses for connections. While these offer some shock absorption, they have significant drawbacks: low pressure resistance (typically ≤0.3MPa), making them prone to bulging or bursting under long-term pressure; the rubber material is easily swelled and aged in a gas environment, resulting in a short lifespan (generally less than 2 years); and the hoses have poor bending resistance, making them easily ignited by the high temperatures of stoves. Therefore, there is an urgent need for a pipe connection solution that combines high pressure resistance with efficient shock absorption to address the issues of pressure pulsation transmission and interface reliability. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the above-mentioned problems with a constant pressure damping booster pump, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a constant pressure damping booster pump, which is used to solve the problems of "existing rubber hose connections having low pressure resistance, short service life and poor bending resistance".

[0007] To solve the above technical problems, this utility model provides the following technical solution: a constant pressure damping booster pump, comprising: a booster pump and a constant pressure valve, wherein a buffer tube is detachably installed at the output end of the constant pressure valve for damping the vibration generated by the fluid;

[0008] The buffer tube includes a spiral metal tube and connectors fixed at both ends;

[0009] One end of the connector is connected to the gas outlet of the constant pressure valve, and the other end is adapted to the gas pipe of the gas stove.

[0010] As a preferred embodiment of the constant pressure shock-absorbing booster pump of this utility model, the constant pressure valve is an integral unit, with its valve body integrating an air inlet and an air outlet. An air inlet channel is provided in the air inlet and the air outlet, and the air inlet is detachably connected to the output end of the booster pump via a thread.

[0011] As a preferred embodiment of the constant pressure damping booster pump of this utility model, the constant pressure valve has a built-in pressure regulating chamber in its valve body, and a spring-pre-tightened diaphragm structure is provided in the chamber to maintain the output pressure constant within the range of 0.2-0.5 MPa.

[0012] As a preferred embodiment of the constant pressure damping booster pump of this utility model, the air outlet end is provided with an external thread, the cross-section of which is a triangular sawtooth thread, to enhance the anti-loosening performance.

[0013] As a preferred embodiment of the constant pressure damping booster pump of this utility model, the connector is fixed to the spiral metal tube by brazing, and the inner wall of the connector is provided with a conical sealing surface.

[0014] As a preferred embodiment of the constant pressure damping booster pump of this utility model, the pitch of the spiral metal tube is 1.5-2 times the tube diameter, the spiral diameter is ≥50mm, and the bending radius is evenly distributed to disperse vibration stress.

[0015] As a preferred embodiment of the constant pressure damping booster pump of this utility model, the spiral metal tube is made of copper-nickel alloy with a wall thickness of 0.8-1.2mm and is covered with a polytetrafluoroethylene anti-corrosion coating.

[0016] As a preferred embodiment of the constant pressure damping booster pump of this utility model, the connector has a threaded groove that matches the external thread, and an annular sealing groove is provided at the end of the threaded groove, with an O-ring embedded in the groove to form a radial compression seal.

[0017] The beneficial effects of this utility model are as follows: the buffer tube is used to buffer the shock generated by the fluid, and the spiral copper-nickel alloy metal tube is used instead of the traditional rubber hose. With the polytetrafluoroethylene anti-corrosion coating on the surface, the pressure resistance limit and corrosion resistance of the pipeline are significantly improved, and the service life is extended. The spiral structure design utilizes a uniform bending radius to efficiently disperse the fluid pulsation stress generated by the booster pump and suppress flame vibration. The connector and the gas outlet of the constant pressure valve are connected by a triangular sawtooth external thread to prevent loosening, and an integrated conical sealing surface and O-ring rubber ring are used for radial compression sealing, which ensures the detachability of the interface while preventing gas leakage. The integrated constant pressure valve has a built-in spring pre-tightening diaphragm structure to maintain stable pressure, and the inherent bending resistance and high temperature resistance of the metal tube further eliminate the safety hazards of rubber hose bulging, bursting and high temperature ignition. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0019] Figure 1 This is a schematic diagram of the structure of a constant pressure damping booster pump according to the present invention.

[0020] Figure 2 This is a schematic diagram of the buffer tube in this utility model.

[0021] Figure 3 This is a schematic diagram of the booster pump and constant pressure valve in this utility model.

[0022] Figure descriptions: 100, booster pump; 200, constant pressure valve; 201, valve body; 202, air outlet; 202a, external thread; 300, buffer tube; 301, spiral metal tube; 302, connector; 302a, conical sealing surface; 302b, thread groove. Detailed Implementation

[0023] To make the above-mentioned objectives, 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.

[0024] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0026] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0027] Example 1

[0028] Reference Figures 1 to 3 This is the first embodiment of the present utility model. This embodiment provides a constant pressure damping booster pump, which includes: a booster pump 100 and a constant pressure valve 200. The output end of the constant pressure valve 200 is detachably equipped with a buffer tube 300 for use in...

[0029] Reference Figure 2 The buffer tube 300 includes a spiral metal tube 301 and a connector 302 fixed at both ends. One end of the connector 302 is connected to the gas outlet 202 of the constant pressure valve 200, and the other end is adapted to the gas pipe of the gas stove.

[0030] During use, natural gas is pressurized to the target value by booster pump 100 and then enters constant pressure valve 200, which stably outputs natural gas to buffer pipe 300. Buffer pipe 300 is used to buffer the shock generated by the fluid.

[0031] Example 2

[0032] Reference Figures 1 to 3 This is the second embodiment of the present invention. Unlike the previous embodiment, the constant pressure valve 200 is an integral unit. Its valve body 201 integrates an air inlet and an air outlet 202. An air inlet channel is provided in the air inlet and the air outlet 202. Natural gas enters the valve body 201 through the air inlet and is discharged through the air outlet 202. The valve body 201 of the constant pressure valve 200 has a built-in pressure regulating chamber. The chamber is provided with a spring-pre-tightened diaphragm structure to maintain the output pressure constant within the range of 0.2-0.5MPa. The air inlet is detachably connected to the output end of the booster pump 100 by a thread.

[0033] Furthermore, refer to Figure 3 The end of the air outlet 202 is provided with an external thread 202a, the cross section of which is a triangular sawtooth thread, which serves to prevent loosening.

[0034] Furthermore, refer to Figure 2 The connector 302 is fixed to the spiral metal tube 301 by brazing, and the inner wall of the connector 302 is provided with a conical sealing surface 302a to improve the sealing performance.

[0035] Furthermore, refer to Figure 2 The pitch of the spiral metal tube 301 is 1.5 to 2 times the tube diameter, the spiral diameter is ≥50mm, and the bending radius is evenly distributed to uniformly disperse vibration stress.

[0036] Furthermore, the spiral metal tube 301 is made of copper-nickel alloy with a wall thickness of 0.8-1.2mm and is coated with a polytetrafluoroethylene anti-corrosion coating, which improves its anti-corrosion performance and increases its service life.

[0037] Furthermore, a threaded groove 302b matching the external thread 202a is provided inside the connector 302, and an annular sealing groove is provided at the end of the threaded groove 302b, with an O-ring embedded in the groove to form a radial compression seal and improve the sealing performance; it should also be noted that, for those skilled in the art, other existing sealing structures can be used without creative effort.

[0038] In use, this application replaces traditional rubber hoses with spiral copper-nickel alloy metal tubes, combined with a polytetrafluoroethylene anti-corrosion coating, significantly improving the pressure resistance and corrosion resistance of the pipeline and extending its service life. The spiral structure design utilizes a uniform bending radius to efficiently disperse the fluid pulsation stress generated by the booster pump 100, suppressing flame flickering. The connector 302 and the outlet 202 of the constant pressure valve 200 are connected to the valve via a triangular sawtooth external thread 202a for anti-loosening, and an integrated conical sealing surface 302a and an O-ring provide radial compression sealing, ensuring the interface is detachable while preventing gas leakage. The integrated constant pressure valve 200 has a built-in spring pre-tightening diaphragm structure to maintain stable pressure, while the inherent bending resistance and high-temperature resistance of the metal tube further eliminate the safety hazards of rubber hose bulging, bursting, and high-temperature ignition.

[0039] It is worth noting that: all standard parts used in this application can be purchased from the market, and irregular parts can be customized according to the description and drawings. The machinery, parts and equipment all adopt conventional models in the prior art.

[0040] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A constant pressure shock absorbing booster pump comprising a booster pump (100) and a constant pressure valve (200), characterized in that: The output end of the constant pressure valve (200) is detachably equipped with a buffer tube (300) for buffering the shock generated by the fluid. The buffer tube (300) includes a spiral metal tube (301) and connectors (302) fixed at both ends; One end of the connector (302) is connected to the gas outlet (202) of the constant pressure valve (200), and the other end is adapted to the gas pipe of the gas stove.

2. The constant pressure shock mitigating booster pump of claim 1, wherein: The constant pressure valve (200) is an integral unit, with its valve body (201) integrating an air inlet and an air outlet (202). An air inlet channel is provided in the air inlet and the air outlet (202). The air inlet is detachably connected to the output end of the booster pump (100) via a thread.

3. The constant pressure shock mitigating booster pump of claim 1, wherein: The constant pressure valve (200) has a built-in pressure regulating chamber in its valve body (201), and a spring-pre-tightened diaphragm structure is provided in the chamber to maintain the output pressure constant within the range of 0.2-0.5MPa.

4. The constant pressure shock mitigating booster pump of claim 1, wherein: The air outlet (202) has an external thread (202a) at its end, which has a triangular sawtooth-shaped thread in cross section to enhance the anti-loosening performance.

5. The constant pressure shock mitigating booster pump of claim 1, wherein: The connector (302) is fixed to the spiral metal tube (301) by brazing, and the inner wall of the connector (302) is provided with a conical sealing surface (302a).

6. The constant pressure shock mitigating booster pump of claim 1, wherein: The pitch of the spiral metal tube (301) is 1.5 to 2 times the tube diameter, the spiral diameter is ≥50mm, and the bending radius is evenly distributed to disperse vibration stress.

7. The constant pressure damping booster pump according to claim 1, characterized in that: The spiral metal tube (301) is made of copper-nickel alloy with a wall thickness of 0.8-1.2 mm and is covered with a polytetrafluoroethylene anti-corrosion coating.

8. The constant pressure damping booster pump according to claim 1, characterized in that: The connector (302) has a threaded groove (302b) that matches the external thread (202a), and an annular sealing groove is provided at the end of the threaded groove (302b), with an O-ring embedded in the groove to form a radial compression seal.

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