Booster pump

Abstract

The utility model discloses a booster pump, and relates to the technical field of gas pressurization. The booster pump comprises a driving cylinder body, a piston rod, a first driving piston, a second driving piston, a first booster cylinder body and a second booster cylinder body, the driving cylinder body is provided with a first driving cavity and a second driving cavity which are symmetrically arranged; the piston rod penetrates through the partition wall, and the two ends of the piston rod extend into the first driving cavity and the second driving cavity correspondingly. The first pressurizing cylinder body is connected with one end of the driving cylinder body, and a first pressurizing piston connected with the first driving piston is arranged in the first pressurizing cavity; the second pressurizing cylinder body is connected with the other end of the driving cylinder body, and a second pressurizing piston connected with the second driving piston is arranged in the second pressurizing cavity. The structure of the booster pump is improved, and the single-pole double-acting double-drive booster pump is high in strength, good in sealing performance, reasonable in structure, suitable for low-temperature and high-pressure environments and particularly suitable for boosting liquid carbon dioxide.

Description

Technical Field

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

[0002] With the development of industrial technology, the application of low-temperature and high-pressure gases is becoming increasingly widespread. For example, liquid carbon dioxide has important applications in food processing, machinery cleaning, and oil extraction. However, liquid carbon dioxide has characteristics such as low temperature (below -50℃), easy vaporization, and strong corrosiveness, which places extremely high demands on the performance of booster pumps.

[0003] Existing booster pumps, when used for boosting liquid carbon dioxide, employ single-drive, single-acting pumps, resulting in low boosting efficiency. To improve efficiency, the number of pumps or their operating speed must be increased, but this only increases the waste of the drive source and shortens its lifespan. Utility Model Content

[0004] The main purpose of this utility model is to provide a booster pump that achieves dual-action dual-drive boosting to improve boosting efficiency, thereby avoiding waste and shortened lifespan of the drive source.

[0005] To achieve the above objectives, this utility model proposes a booster pump, comprising:

[0006] The drive cylinder has a first drive chamber and a second drive chamber arranged symmetrically. At least one of the first drive chamber and the second drive chamber is adapted to be introduced with compressed gas. The first drive chamber and the second drive chamber are separated by a partition wall.

[0007] A piston rod is disposed through the partition wall and extends at both ends into the first drive cavity and the second drive cavity, respectively.

[0008] The first driving piston is located inside the first driving chamber and is disposed on one end of the piston rod;

[0009] The second driving piston is located inside the second driving chamber and is disposed on the other end of the piston rod;

[0010] A first booster cylinder body is connected to one end of the drive cylinder body. The first booster cylinder body has a first booster chamber and a first inlet and a first outlet respectively connected to the first booster chamber. A first booster piston connected to the first drive piston is provided in the first booster chamber. The first inlet is adapted to introduce liquid to be boosted, and the first outlet is adapted to discharge the boosted liquid.

[0011] The second booster cylinder is connected to the other end of the drive cylinder. The second booster cylinder is provided with a second booster chamber and a second inlet and a second outlet respectively connected to the second booster chamber. The second booster chamber is provided with a second booster piston connected to the second drive piston. The second inlet is suitable for introducing liquid to be boosted, and the second outlet is suitable for discharging the boosted liquid.

[0012] Optionally, a first buffer chamber and a second buffer chamber are respectively provided at both ends of the drive cylinder. The first buffer chamber is connected to the first drive chamber and is used to reduce gas pressure fluctuations, and the second buffer chamber is connected to the second drive chamber and is used to reduce gas pressure fluctuations.

[0013] Optionally, the radial dimension of the first buffer cavity is smaller than the radial dimension of the first drive cavity, and the radial dimension of the second buffer cavity is smaller than the radial dimension of the second drive cavity.

[0014] Optionally, both the first suction port and the second suction port are provided with a one-way liquid inlet valve.

[0015] Optionally, both the first outlet and the second outlet are equipped with a one-way discharge valve.

[0016] Optionally, both the first suction port and the second suction port are provided with a first seal for sealing the mounting location of the one-way liquid inlet valve, and both the first discharge port and the second discharge port are provided with a second seal for sealing the mounting location of the one-way liquid outlet valve.

[0017] Optionally, both the first seal and the second seal are made of fluororubber or polytetrafluoroethylene.

[0018] Optionally, sealing components are provided at the contact points between the first booster piston and the inner wall of the first booster cylinder, and at the contact points between the second booster piston and the inner wall of the second booster cylinder.

[0019] Optionally, both the first and second booster cylinder bodies are made of alloy steel.

[0020] Optionally, the booster pump can withstand a maximum pressure of 100 bar.

[0021] In the technical solution of this utility model, the booster pump includes a drive cylinder body, a piston rod, a first drive piston, a second drive piston, a first booster cylinder body, and a second booster cylinder body; the drive cylinder body has a first drive chamber and a second drive chamber symmetrically arranged, at least one of the first drive chamber and the second drive chamber is adapted to be supplied with compressed gas, and the first drive chamber and the second drive chamber are separated by a partition wall; the piston rod is disposed through the partition wall and extends to the first drive chamber and the second drive chamber at both ends respectively; the first drive piston is located in the first drive chamber and is disposed on one end of the piston rod; the second drive piston is located in the second drive chamber and is disposed on the other end of the piston rod; the first booster cylinder body and the second booster cylinder body are respectively disposed on the first drive chamber and the second drive cylinder body. A first booster cylinder is connected to one end of the drive cylinder. It has a first booster chamber and a first inlet and a first outlet connected to the first booster chamber. A first booster piston connected to a first drive piston is located within the first booster chamber. The first inlet is suitable for introducing the liquid to be boosted, and the first outlet is suitable for discharging the boosted liquid. A second booster cylinder is connected to the other end of the drive cylinder. It has a second booster chamber and a second inlet and a second outlet connected to the second booster chamber. A second booster piston connected to a second drive piston is located within the second booster chamber. The second inlet is suitable for introducing the liquid to be boosted, and the second outlet is suitable for discharging the boosted liquid. It can be understood that this invention improves the structure of the booster pump. By setting a symmetrical cavity structure in one drive cylinder and setting drive pistons at both ends of the same piston rod, with the two drive pistons connected to two booster structures respectively, a double-acting, double-drive booster is achieved, greatly improving booster efficiency and avoiding waste and shortened lifespan of the drive source. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the booster pump of this utility model;

[0024] Figure 2 This is a cross-sectional view of an embodiment of the booster pump of this utility model;

[0025] Figure 3 This is a partial cross-sectional view of an embodiment of the booster pump of this utility model.

[0026] Explanation of icon numbers:

[0027] 10. Drive cylinder; 20. Piston rod; 30. First drive piston; 40. Second drive piston; 50. First booster cylinder; 60. Second booster cylinder; 70. First booster piston; 80. Second booster piston; 10a. First drive chamber; 10b. Second drive chamber; 50a. First booster chamber; 50b. First suction port; 50c. First discharge port; 60a. Second booster chamber; 60b. Second suction port; 60c. Second discharge port; 10a. First buffer chamber; 10b1. Second buffer chamber; 11. One-way inlet valve; 12. One-way outlet valve; 13. First seal; 14. Second seal; 15. Sealing assembly.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0031] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. If the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. The technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] This invention proposes a booster pump that can be used to boost the pressure of gases or liquids, especially low-temperature, high-pressure liquids such as liquid carbon dioxide, but is not limited to this.

[0034] Reference Figures 1 to 3 In one embodiment of this utility model, the booster pump includes a drive cylinder 10, a piston rod 20, a first drive piston 30, a second drive piston 40, a first booster cylinder 50, and a second booster cylinder 60. The drive cylinder 10 has a first drive chamber 10a and a second drive chamber 10b symmetrically arranged. At least one of the first drive chamber 10a and the second drive chamber 10b is adapted to be purged with compressed gas. The first drive chamber 10a and the second drive chamber 10b are separated by a partition wall. The piston rod 20 passes through the partition wall and extends to the first drive chamber 10a and the second drive chamber 10b at both ends, respectively. The first drive piston 30 is located in the first drive chamber 10a and is disposed on one end of the piston rod 20. The second drive piston 40 is located in the second drive chamber 10b and is disposed on the other end of the piston rod 20. The first booster cylinder 50 and the second booster cylinder 60 are connected. One end of the driving cylinder 10 is connected to a first booster cylinder 50, which is provided with a first booster chamber 50a and a first inlet 50b and a first outlet 50c respectively connected to the first booster chamber 50a. The first booster chamber 50a is provided with a first booster piston 70 connected to the first driving piston 30. The first inlet 50b is suitable for introducing liquid to be boosted, and the first outlet 50c is suitable for discharging the boosted liquid. The other end of the second booster cylinder 60 is connected to the driving cylinder 10. The second booster cylinder 60 is provided with a second booster chamber 60a and a second inlet 60b and a second outlet 60c respectively connected to the second booster chamber 60a. The second booster chamber 60a is provided with a second booster piston 80 connected to the second driving piston 40. The second inlet 60b is suitable for introducing liquid to be boosted, and the second outlet 60c is suitable for discharging the boosted liquid.

[0035] In this embodiment, both the first pressurization chamber 50a and the second pressurization chamber 60a can adopt a streamlined flow channel design to reduce fluid resistance and help improve pressurization efficiency.

[0036] It is understood that this utility model improves the structure of the booster pump by setting a symmetrical cavity structure in a drive cylinder 10 and setting drive pistons at both ends of the same piston rod 20. The two drive pistons are respectively connected to two booster structures, thereby realizing double-acting double-drive boosting, which greatly improves boosting efficiency and avoids waste of drive source and shortened life.

[0037] To improve the stability of the drive piston movement of the booster pump and further enhance the boosting effect, refer to Figure 1 and Figure 2 In one embodiment, a first buffer chamber 10a and a second buffer chamber 10b1 are respectively provided in the two ends of the drive cylinder 10. The first buffer chamber 10a is connected to the first drive chamber 10a and is used to reduce gas pressure fluctuations. The second buffer chamber 10b1 is connected to the second drive chamber 10b and is used to reduce gas pressure fluctuations.

[0038] In this embodiment, the radial dimension of the first buffer chamber 10a is smaller than the radial dimension of the first drive chamber 10a, and the radial dimension of the second buffer chamber 10b1 is smaller than the radial dimension of the second drive chamber 10b. This achieves a better buffering effect, effectively reducing pressure fluctuations and further improving pressurization stability.

[0039] Reference Figures 1 to 3 In one embodiment, a one-way liquid inlet valve 11 is provided at both the first suction port 50b and the second suction port 60b, and a one-way liquid outlet valve 12 is provided at both the first discharge port 50c and the second discharge port 60c.

[0040] Traditional booster pumps have an unreasonable structural design, making it difficult to adapt to the easily vaporized characteristics of liquid carbon dioxide, which can easily cause cavitation, affecting boosting efficiency and service life. In contrast, the valve bodies of the one-way inlet valve 11 and the one-way outlet valve 12 of this invention can be made of high-strength precision-machined stainless steel and polymer materials to adapt to the easily vaporized characteristics of liquid carbon dioxide and prevent cavitation and leakage.

[0041] Taking liquid carbon dioxide pressurization as an example, when the booster pump is working, liquid carbon dioxide is first drawn from the storage tank, filtered, and then enters the one-way inlet valve 11 of the booster pump; the dried and filtered compressed air serves as power to drive the drive unit to work, driving the piston to move the booster piston back and forth, drawing the liquid carbon dioxide into the booster cylinder and compressing it; the compressed liquid carbon dioxide is discharged through the one-way outlet valve 12 and enters the high-pressure pipeline; the above process is repeated, thus achieving continuous pressurization of liquid carbon dioxide.

[0042] To improve boosting efficiency, one of the first boosting cylinder 50 and the second boosting cylinder 60 may be provided with an interface for external compressed gas, and the other may be connected to the drive cylinder 10 through a pipeline.

[0043] To further improve the sealing performance at the connection between the valve body and the cylinder, refer to Figure 2 and Figure 3 Both the first suction port 50b and the second suction port 60b are provided with a first seal 13 for sealing the mounting location of the one-way liquid inlet valve 11, and both the first discharge port 50c and the second discharge port 60c are provided with a second seal 14 for sealing the mounting location of the one-way liquid outlet valve 12.

[0044] In this embodiment, the materials of the first sealing element 13 and the second sealing element 14 are both low-temperature resistant and corrosion-resistant fluororubber or polytetrafluoroethylene, etc., and no limitation is made here.

[0045] Furthermore, sealing components 15 can be provided at the contact points between the first booster piston 70 and the inner wall of the first booster cylinder 50, and at the contact points between the second booster piston 80 and the inner wall of the second booster cylinder 60. The sealing components 15 can be a combination of rubber sealing rings and retaining rings, etc., and are not limited here.

[0046] In low-temperature environments, traditional booster pumps use ordinary sealing materials, which are prone to hardening and failure, leading to leakage. This invention, however, improves sealing reliability and prevents leakage by using low-temperature resistant and corrosion-resistant sealing materials and a combined sealing ring structure, making it suitable for environments below -50℃.

[0047] Reference Figures 1 to 3 In one embodiment, both the first booster cylinder 50 and the second booster cylinder 60 can be made of alloy steel. Specifically, the first booster cylinder 50 and the second booster cylinder 60 can be made of high-strength alloy steel, which helps to improve their strength and pressure resistance.

[0048] Traditional booster pumps lack sufficient strength, and under high-pressure environments, the pump body is prone to deformation or even cracking, posing safety hazards. The optimized strength design of this invention enables the booster pump to withstand pressures up to 100 bar, ensuring safety and reliability, and making it suitable for high-pressure environments.

[0049] The booster pump of this utility model has at least the following advantages:

[0050] 1) High strength: The optimized strength design enables the booster pump to withstand pressures up to 100 bar, ensuring safety and reliability;

[0051] 2) Excellent sealing performance: It adopts low-temperature resistant and corrosion-resistant sealing materials and a combined sealing structure to effectively prevent leakage and is suitable for low-temperature environments below -50℃;

[0052] 3) Reasonable structure: The optimized structural design effectively solves the problems of easy vaporization and corrosion of liquid carbon dioxide, and improves pressurization efficiency and service life;

[0053] 4) Efficiency improvement: Dual drive enables the boost ratio to be doubled with the addition of a few parts or cost, and the dual-action design doubles the boost efficiency;

[0054] 5) Wide range of applications: It is particularly suitable for pressurizing liquid carbon dioxide, and can also be used for pressurizing other low-temperature and high-pressure gases.

[0055] In summary, this utility model provides a single-stage double-acting dual-drive gas booster pump, which has the advantages of high strength, good sealing performance, reasonable structure, and suitability for low temperature and high pressure environments. It is particularly suitable for boosting liquid carbon dioxide, effectively solving the problem of boosting special gas-liquid mixtures such as carbon dioxide that are low temperature and have a corrosive mechanism, and has broad application prospects.

[0056] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A booster pump, characterized in that, include: The drive cylinder has a first drive chamber and a second drive chamber arranged symmetrically. At least one of the first drive chamber and the second drive chamber is adapted to be introduced with compressed gas. The first drive chamber and the second drive chamber are separated by a partition wall. A piston rod is disposed through the partition wall and extends at both ends into the first drive cavity and the second drive cavity, respectively. The first driving piston is located inside the first driving chamber and is disposed on one end of the piston rod; The second driving piston is located inside the second driving chamber and is disposed on the other end of the piston rod; A first booster cylinder body is connected to one end of the drive cylinder body. The first booster cylinder body is provided with a first booster chamber and a first inlet and a first outlet respectively connected to the first booster chamber. A first booster piston connected to the first drive piston is provided in the first booster chamber. The first inlet is suitable for introducing liquid to be boosted and the first outlet is suitable for discharging the boosted liquid. as well as The second booster cylinder is connected to the other end of the drive cylinder. The second booster cylinder is provided with a second booster chamber and a second inlet and a second outlet respectively connected to the second booster chamber. The second booster chamber is provided with a second booster piston connected to the second drive piston. The second inlet is suitable for introducing liquid to be boosted, and the second outlet is suitable for discharging the boosted liquid.

2. The booster pump as described in claim 1, characterized in that, The drive cylinder is further provided with a first buffer chamber and a second buffer chamber at both ends. The first buffer chamber is connected to the first drive chamber and is used to reduce gas pressure fluctuations. The second buffer chamber is connected to the second drive chamber and is used to reduce gas pressure fluctuations.

3. The booster pump as described in claim 2, characterized in that, The radial dimension of the first buffer cavity is smaller than the radial dimension of the first drive cavity, and the radial dimension of the second buffer cavity is smaller than the radial dimension of the second drive cavity.

4. The booster pump as described in claim 1, characterized in that, Both the first and second suction ports are equipped with one-way liquid inlet valves.

5. The booster pump as described in claim 4, characterized in that, Both the first and second outlets are equipped with one-way discharge valves.

6. The booster pump as described in claim 5, characterized in that, Both the first suction port and the second suction port are provided with a first seal for sealing the mounting location of the one-way liquid inlet valve, and both the first discharge port and the second discharge port are provided with a second seal for sealing the mounting location of the one-way liquid outlet valve.

7. The booster pump as described in claim 6, characterized in that, Both the first and second seals are made of fluororubber or polytetrafluoroethylene.

8. The booster pump as described in claim 1, characterized in that, Sealing components are provided at the contact points between the first booster piston and the inner wall of the first booster cylinder, and at the contact points between the second booster piston and the inner wall of the second booster cylinder.

9. The booster pump as described in claim 1, characterized in that, Both the first and second booster cylinders are made of alloy steel.

10. The booster pump as described in claim 1, characterized in that, The maximum pressure that the booster pump can withstand is 100 bar.

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